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Commit | Line | Data |
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a3f97cbb | 1 | /* Output Dwarf2 format symbol table information from the GNU C compiler. |
1917ef85 | 2 | Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
06ceef4e | 3 | Free Software Foundation, Inc. |
e9a25f70 JL |
4 | Contributed by Gary Funck (gary@intrepid.com). |
5 | Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com). | |
469ac993 | 6 | Extensively modified by Jason Merrill (jason@cygnus.com). |
a3f97cbb JW |
7 | |
8 | This file is part of GNU CC. | |
9 | ||
10 | GNU CC is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | GNU CC is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with GNU CC; see the file COPYING. If not, write to | |
5f38fdda JL |
22 | the Free Software Foundation, 59 Temple Place - Suite 330, |
23 | Boston, MA 02111-1307, USA. */ | |
a3f97cbb | 24 | |
a96c67ec | 25 | /* TODO: Implement .debug_str handling, and share entries somehow. |
348bb3c7 JM |
26 | Emit .debug_line header even when there are no functions, since |
27 | the file numbers are used by .debug_info. Alternately, leave | |
28 | out locations for types and decls. | |
29 | Avoid talking about ctors and op= for PODs. | |
30 | Factor out common prologue sequences into multiple CIEs. */ | |
31 | ||
3f76745e JM |
32 | /* The first part of this file deals with the DWARF 2 frame unwind |
33 | information, which is also used by the GCC efficient exception handling | |
34 | mechanism. The second part, controlled only by an #ifdef | |
35 | DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging | |
36 | information. */ | |
37 | ||
0021b564 | 38 | #include "config.h" |
670ee920 | 39 | #include "system.h" |
a3f97cbb JW |
40 | #include "tree.h" |
41 | #include "flags.h" | |
42 | #include "rtl.h" | |
43 | #include "hard-reg-set.h" | |
44 | #include "regs.h" | |
45 | #include "insn-config.h" | |
46 | #include "reload.h" | |
47 | #include "output.h" | |
71dfc51f | 48 | #include "expr.h" |
3f76745e | 49 | #include "except.h" |
a7cc7f29 | 50 | #include "dwarf2.h" |
76ead72b | 51 | #include "dwarf2out.h" |
2e4b9b8c | 52 | #include "dwarf2asm.h" |
10f0ad3d | 53 | #include "toplev.h" |
1865dbb5 | 54 | #include "varray.h" |
951a525f | 55 | #include "ggc.h" |
881c6935 | 56 | #include "md5.h" |
57bed152 | 57 | #include "tm_p.h" |
a3f97cbb | 58 | |
770ca8c6 JO |
59 | /* DWARF2 Abbreviation Glossary: |
60 | CFA = Canonical Frame Address | |
00a42e21 JM |
61 | a fixed address on the stack which identifies a call frame. |
62 | We define it to be the value of SP just before the call insn. | |
63 | The CFA register and offset, which may change during the course | |
64 | of the function, are used to calculate its value at runtime. | |
a401107d JO |
65 | CFI = Call Frame Instruction |
66 | an instruction for the DWARF2 abstract machine | |
770ca8c6 JO |
67 | CIE = Common Information Entry |
68 | information describing information common to one or more FDEs | |
69 | DIE = Debugging Information Entry | |
70 | FDE = Frame Description Entry | |
71 | information describing the stack call frame, in particular, | |
72 | how to restore registers | |
73 | ||
74 | DW_CFA_... = DWARF2 CFA call frame instruction | |
75 | DW_TAG_... = DWARF2 DIE tag */ | |
76 | ||
0021b564 JM |
77 | /* Decide whether we want to emit frame unwind information for the current |
78 | translation unit. */ | |
79 | ||
80 | int | |
81 | dwarf2out_do_frame () | |
82 | { | |
83 | return (write_symbols == DWARF2_DEBUG | |
9ec36da5 | 84 | #ifdef DWARF2_FRAME_INFO |
556273e0 | 85 | || DWARF2_FRAME_INFO |
9ec36da5 | 86 | #endif |
0021b564 | 87 | #ifdef DWARF2_UNWIND_INFO |
14a774a9 | 88 | || flag_unwind_tables |
0021b564 JM |
89 | || (flag_exceptions && ! exceptions_via_longjmp) |
90 | #endif | |
91 | ); | |
92 | } | |
93 | ||
94 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
95 | ||
eaf95893 RK |
96 | /* How to start an assembler comment. */ |
97 | #ifndef ASM_COMMENT_START | |
98 | #define ASM_COMMENT_START ";#" | |
99 | #endif | |
100 | ||
a3f97cbb JW |
101 | typedef struct dw_cfi_struct *dw_cfi_ref; |
102 | typedef struct dw_fde_struct *dw_fde_ref; | |
103 | typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref; | |
a3f97cbb JW |
104 | |
105 | /* Call frames are described using a sequence of Call Frame | |
106 | Information instructions. The register number, offset | |
107 | and address fields are provided as possible operands; | |
108 | their use is selected by the opcode field. */ | |
71dfc51f | 109 | |
a3f97cbb | 110 | typedef union dw_cfi_oprnd_struct |
71dfc51f RK |
111 | { |
112 | unsigned long dw_cfi_reg_num; | |
113 | long int dw_cfi_offset; | |
d3e3972c | 114 | const char *dw_cfi_addr; |
7d9d8943 | 115 | struct dw_loc_descr_struct *dw_cfi_loc; |
71dfc51f | 116 | } |
a3f97cbb JW |
117 | dw_cfi_oprnd; |
118 | ||
119 | typedef struct dw_cfi_struct | |
71dfc51f RK |
120 | { |
121 | dw_cfi_ref dw_cfi_next; | |
122 | enum dwarf_call_frame_info dw_cfi_opc; | |
123 | dw_cfi_oprnd dw_cfi_oprnd1; | |
124 | dw_cfi_oprnd dw_cfi_oprnd2; | |
125 | } | |
a3f97cbb JW |
126 | dw_cfi_node; |
127 | ||
7d9d8943 AM |
128 | /* This is how we define the location of the CFA. We use to handle it |
129 | as REG + OFFSET all the time, but now it can be more complex. | |
130 | It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET. | |
556273e0 | 131 | Instead of passing around REG and OFFSET, we pass a copy |
7d9d8943 AM |
132 | of this structure. */ |
133 | typedef struct cfa_loc | |
134 | { | |
556273e0 | 135 | unsigned long reg; |
7d9d8943 AM |
136 | long offset; |
137 | long base_offset; | |
138 | int indirect; /* 1 if CFA is accessed via a dereference. */ | |
139 | } dw_cfa_location; | |
140 | ||
a3f97cbb | 141 | /* All call frame descriptions (FDE's) in the GCC generated DWARF |
4b674448 | 142 | refer to a single Common Information Entry (CIE), defined at |
a3f97cbb JW |
143 | the beginning of the .debug_frame section. This used of a single |
144 | CIE obviates the need to keep track of multiple CIE's | |
145 | in the DWARF generation routines below. */ | |
71dfc51f | 146 | |
a3f97cbb | 147 | typedef struct dw_fde_struct |
71dfc51f | 148 | { |
d3e3972c KG |
149 | const char *dw_fde_begin; |
150 | const char *dw_fde_current_label; | |
151 | const char *dw_fde_end; | |
71dfc51f | 152 | dw_cfi_ref dw_fde_cfi; |
737faf14 | 153 | int nothrow; |
71dfc51f | 154 | } |
a3f97cbb JW |
155 | dw_fde_node; |
156 | ||
a3f97cbb JW |
157 | /* Maximum size (in bytes) of an artificially generated label. */ |
158 | #define MAX_ARTIFICIAL_LABEL_BYTES 30 | |
159 | ||
a1a4189d | 160 | /* The size of the target's pointer type. */ |
a3f97cbb | 161 | #ifndef PTR_SIZE |
a9d38797 | 162 | #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT) |
a3f97cbb JW |
163 | #endif |
164 | ||
a1a4189d JB |
165 | /* The size of addresses as they appear in the Dwarf 2 data. |
166 | Some architectures use word addresses to refer to code locations, | |
167 | but Dwarf 2 info always uses byte addresses. On such machines, | |
168 | Dwarf 2 addresses need to be larger than the architecture's | |
169 | pointers. */ | |
170 | #ifndef DWARF2_ADDR_SIZE | |
171 | #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
172 | #endif | |
173 | ||
7e23cb16 | 174 | /* The size in bytes of a DWARF field indicating an offset or length |
a1a4189d JB |
175 | relative to a debug info section, specified to be 4 bytes in the |
176 | DWARF-2 specification. The SGI/MIPS ABI defines it to be the same | |
b13fe8bf | 177 | as PTR_SIZE. */ |
71dfc51f | 178 | |
7e23cb16 JM |
179 | #ifndef DWARF_OFFSET_SIZE |
180 | #define DWARF_OFFSET_SIZE 4 | |
181 | #endif | |
182 | ||
9a666dda JM |
183 | #define DWARF_VERSION 2 |
184 | ||
7e23cb16 JM |
185 | /* Round SIZE up to the nearest BOUNDARY. */ |
186 | #define DWARF_ROUND(SIZE,BOUNDARY) \ | |
262b6384 | 187 | ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY)) |
a3f97cbb | 188 | |
a3f97cbb | 189 | /* Offsets recorded in opcodes are a multiple of this alignment factor. */ |
27c35f4b | 190 | #ifndef DWARF_CIE_DATA_ALIGNMENT |
469ac993 | 191 | #ifdef STACK_GROWS_DOWNWARD |
08cb3d38 | 192 | #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) |
469ac993 | 193 | #else |
08cb3d38 | 194 | #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) |
469ac993 | 195 | #endif |
27c35f4b | 196 | #endif /* not DWARF_CIE_DATA_ALIGNMENT */ |
a3f97cbb | 197 | |
3f76745e JM |
198 | /* A pointer to the base of a table that contains frame description |
199 | information for each routine. */ | |
200 | static dw_fde_ref fde_table; | |
a3f97cbb | 201 | |
3f76745e JM |
202 | /* Number of elements currently allocated for fde_table. */ |
203 | static unsigned fde_table_allocated; | |
a94dbf2c | 204 | |
3f76745e JM |
205 | /* Number of elements in fde_table currently in use. */ |
206 | static unsigned fde_table_in_use; | |
a3f97cbb | 207 | |
3f76745e JM |
208 | /* Size (in elements) of increments by which we may expand the |
209 | fde_table. */ | |
210 | #define FDE_TABLE_INCREMENT 256 | |
a3f97cbb | 211 | |
a94dbf2c JM |
212 | /* A list of call frame insns for the CIE. */ |
213 | static dw_cfi_ref cie_cfi_head; | |
214 | ||
a3f97cbb JW |
215 | /* The number of the current function definition for which debugging |
216 | information is being generated. These numbers range from 1 up to the | |
217 | maximum number of function definitions contained within the current | |
218 | compilation unit. These numbers are used to create unique label id's | |
219 | unique to each function definition. */ | |
4f988ea2 | 220 | static unsigned current_funcdef_number = 0; |
a3f97cbb JW |
221 | |
222 | /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram | |
223 | attribute that accelerates the lookup of the FDE associated | |
556273e0 | 224 | with the subprogram. This variable holds the table index of the FDE |
a3f97cbb JW |
225 | associated with the current function (body) definition. */ |
226 | static unsigned current_funcdef_fde; | |
227 | ||
a3f97cbb | 228 | /* Forward declarations for functions defined in this file. */ |
71dfc51f | 229 | |
83d2b3b9 KG |
230 | static char *stripattributes PARAMS ((const char *)); |
231 | static const char *dwarf_cfi_name PARAMS ((unsigned)); | |
232 | static dw_cfi_ref new_cfi PARAMS ((void)); | |
233 | static void add_cfi PARAMS ((dw_cfi_ref *, dw_cfi_ref)); | |
d3e3972c | 234 | static void add_fde_cfi PARAMS ((const char *, dw_cfi_ref)); |
7d9d8943 AM |
235 | static void lookup_cfa_1 PARAMS ((dw_cfi_ref, dw_cfa_location *)); |
236 | static void lookup_cfa PARAMS ((dw_cfa_location *)); | |
d3e3972c KG |
237 | static void reg_save PARAMS ((const char *, unsigned, |
238 | unsigned, long)); | |
83d2b3b9 | 239 | static void initial_return_save PARAMS ((rtx)); |
5e640c56 | 240 | static long stack_adjust_offset PARAMS ((rtx)); |
83d2b3b9 KG |
241 | static void output_cfi PARAMS ((dw_cfi_ref, dw_fde_ref)); |
242 | static void output_call_frame_info PARAMS ((int)); | |
83d2b3b9 | 243 | static void dwarf2out_stack_adjust PARAMS ((rtx)); |
d3e3972c | 244 | static void dwarf2out_frame_debug_expr PARAMS ((rtx, const char *)); |
a3f97cbb | 245 | |
7d9d8943 AM |
246 | /* Support for complex CFA locations. */ |
247 | static void output_cfa_loc PARAMS ((dw_cfi_ref)); | |
556273e0 | 248 | static void get_cfa_from_loc_descr PARAMS ((dw_cfa_location *, |
7d9d8943 AM |
249 | struct dw_loc_descr_struct *)); |
250 | static struct dw_loc_descr_struct *build_cfa_loc | |
251 | PARAMS ((dw_cfa_location *)); | |
252 | static void def_cfa_1 PARAMS ((const char *, dw_cfa_location *)); | |
253 | ||
2e4b9b8c RH |
254 | /* How to start an assembler comment. */ |
255 | #ifndef ASM_COMMENT_START | |
256 | #define ASM_COMMENT_START ";#" | |
a3f97cbb JW |
257 | #endif |
258 | ||
7e23cb16 JM |
259 | /* Data and reference forms for relocatable data. */ |
260 | #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4) | |
261 | #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4) | |
262 | ||
a3f97cbb JW |
263 | /* Pseudo-op for defining a new section. */ |
264 | #ifndef SECTION_ASM_OP | |
0a3e1f45 | 265 | #define SECTION_ASM_OP "\t.section\t" |
a3f97cbb JW |
266 | #endif |
267 | ||
268 | /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to | |
269 | print the SECTION_ASM_OP and the section name. The default here works for | |
270 | almost all svr4 assemblers, except for the sparc, where the section name | |
271 | must be enclosed in double quotes. (See sparcv4.h). */ | |
272 | #ifndef SECTION_FORMAT | |
c53aa195 JM |
273 | #ifdef PUSHSECTION_FORMAT |
274 | #define SECTION_FORMAT PUSHSECTION_FORMAT | |
275 | #else | |
e8638df0 | 276 | #define SECTION_FORMAT "%s%s\n" |
c53aa195 | 277 | #endif |
a3f97cbb JW |
278 | #endif |
279 | ||
a3f97cbb JW |
280 | #ifndef FRAME_SECTION |
281 | #define FRAME_SECTION ".debug_frame" | |
282 | #endif | |
a3f97cbb | 283 | |
5c90448c JM |
284 | #ifndef FUNC_BEGIN_LABEL |
285 | #define FUNC_BEGIN_LABEL "LFB" | |
a3f97cbb | 286 | #endif |
5c90448c JM |
287 | #ifndef FUNC_END_LABEL |
288 | #define FUNC_END_LABEL "LFE" | |
a3f97cbb | 289 | #endif |
a6ab3aad JM |
290 | #define CIE_AFTER_SIZE_LABEL "LSCIE" |
291 | #define CIE_END_LABEL "LECIE" | |
2ed2af28 | 292 | #define CIE_LENGTH_LABEL "LLCIE" |
2e4b9b8c RH |
293 | #define FDE_LABEL "LSFDE" |
294 | #define FDE_AFTER_SIZE_LABEL "LASFDE" | |
a6ab3aad | 295 | #define FDE_END_LABEL "LEFDE" |
2ed2af28 | 296 | #define FDE_LENGTH_LABEL "LLFDE" |
2e4b9b8c RH |
297 | #define LINE_NUMBER_BEGIN_LABEL "LTSTART" |
298 | #define LINE_NUMBER_END_LABEL "LTEND" | |
881c6935 | 299 | #define DIE_LABEL_PREFIX "DW" |
a3f97cbb | 300 | |
a3f97cbb JW |
301 | /* Definitions of defaults for various types of primitive assembly language |
302 | output operations. These may be overridden from within the tm.h file, | |
956d6950 | 303 | but typically, that is unnecessary. */ |
71dfc51f | 304 | |
a3f97cbb JW |
305 | #ifndef ASM_OUTPUT_SECTION |
306 | #define ASM_OUTPUT_SECTION(FILE, SECTION) \ | |
307 | fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION) | |
308 | #endif | |
309 | ||
2ed2af28 PDM |
310 | #ifdef SET_ASM_OP |
311 | #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL | |
7bb9fb0e JM |
312 | #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \ |
313 | do { \ | |
e8638df0 | 314 | fprintf (FILE, "%s", SET_ASM_OP); \ |
7bb9fb0e JM |
315 | assemble_name (FILE, SY); \ |
316 | fputc (',', FILE); \ | |
317 | assemble_name (FILE, HI); \ | |
318 | fputc ('-', FILE); \ | |
319 | assemble_name (FILE, LO); \ | |
320 | } while (0) | |
2ed2af28 PDM |
321 | #endif |
322 | #endif /* SET_ASM_OP */ | |
323 | ||
c8cc5c4a | 324 | /* The DWARF 2 CFA column which tracks the return address. Normally this |
a94dbf2c JM |
325 | is the column for PC, or the first column after all of the hard |
326 | registers. */ | |
c8cc5c4a | 327 | #ifndef DWARF_FRAME_RETURN_COLUMN |
a94dbf2c JM |
328 | #ifdef PC_REGNUM |
329 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) | |
330 | #else | |
3073d01c | 331 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS |
a94dbf2c | 332 | #endif |
c8cc5c4a JM |
333 | #endif |
334 | ||
335 | /* The mapping from gcc register number to DWARF 2 CFA column number. By | |
469ac993 | 336 | default, we just provide columns for all registers. */ |
c8cc5c4a | 337 | #ifndef DWARF_FRAME_REGNUM |
469ac993 | 338 | #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) |
c8cc5c4a | 339 | #endif |
3f76745e | 340 | |
0021b564 JM |
341 | /* Hook used by __throw. */ |
342 | ||
343 | rtx | |
344 | expand_builtin_dwarf_fp_regnum () | |
345 | { | |
346 | return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM)); | |
347 | } | |
348 | ||
a6ab3aad JM |
349 | /* The offset from the incoming value of %sp to the top of the stack frame |
350 | for the current function. */ | |
351 | #ifndef INCOMING_FRAME_SP_OFFSET | |
352 | #define INCOMING_FRAME_SP_OFFSET 0 | |
353 | #endif | |
354 | ||
71dfc51f | 355 | /* Return a pointer to a copy of the section string name S with all |
bf20f341 | 356 | attributes stripped off, and an asterisk prepended (for assemble_name). */ |
71dfc51f RK |
357 | |
358 | static inline char * | |
a3f97cbb | 359 | stripattributes (s) |
d560ee52 | 360 | const char *s; |
a3f97cbb | 361 | { |
bf20f341 | 362 | char *stripped = xmalloc (strlen (s) + 2); |
71dfc51f RK |
363 | char *p = stripped; |
364 | ||
bf20f341 JW |
365 | *p++ = '*'; |
366 | ||
367 | while (*s && *s != ',') | |
368 | *p++ = *s++; | |
71dfc51f | 369 | |
a3f97cbb JW |
370 | *p = '\0'; |
371 | return stripped; | |
372 | } | |
373 | ||
d9d5c9de | 374 | /* Generate code to initialize the register size table. */ |
2f3ca9e7 | 375 | |
d9d5c9de BS |
376 | void |
377 | expand_builtin_init_dwarf_reg_sizes (address) | |
378 | tree address; | |
2f3ca9e7 | 379 | { |
d9d5c9de BS |
380 | int i; |
381 | enum machine_mode mode = TYPE_MODE (char_type_node); | |
382 | rtx addr = expand_expr (address, NULL_RTX, VOIDmode, 0); | |
383 | rtx mem = gen_rtx_MEM (mode, addr); | |
2f3ca9e7 | 384 | |
376e12ab | 385 | for (i = 0; i < DWARF_FRAME_REGISTERS; ++i) |
2f3ca9e7 | 386 | { |
e0e07bd1 | 387 | int offset = DWARF_FRAME_REGNUM (i) * GET_MODE_SIZE (mode); |
d9d5c9de | 388 | int size = GET_MODE_SIZE (reg_raw_mode[i]); |
2f3ca9e7 | 389 | |
c699cee9 JM |
390 | if (offset < 0) |
391 | continue; | |
392 | ||
d9d5c9de BS |
393 | emit_move_insn (change_address (mem, mode, |
394 | plus_constant (addr, offset)), | |
395 | GEN_INT (size)); | |
2f3ca9e7 | 396 | } |
2f3ca9e7 JM |
397 | } |
398 | ||
3f76745e | 399 | /* Convert a DWARF call frame info. operation to its string name */ |
a3f97cbb | 400 | |
d560ee52 | 401 | static const char * |
3f76745e JM |
402 | dwarf_cfi_name (cfi_opc) |
403 | register unsigned cfi_opc; | |
404 | { | |
405 | switch (cfi_opc) | |
406 | { | |
407 | case DW_CFA_advance_loc: | |
408 | return "DW_CFA_advance_loc"; | |
409 | case DW_CFA_offset: | |
410 | return "DW_CFA_offset"; | |
411 | case DW_CFA_restore: | |
412 | return "DW_CFA_restore"; | |
413 | case DW_CFA_nop: | |
414 | return "DW_CFA_nop"; | |
415 | case DW_CFA_set_loc: | |
416 | return "DW_CFA_set_loc"; | |
417 | case DW_CFA_advance_loc1: | |
418 | return "DW_CFA_advance_loc1"; | |
419 | case DW_CFA_advance_loc2: | |
420 | return "DW_CFA_advance_loc2"; | |
421 | case DW_CFA_advance_loc4: | |
422 | return "DW_CFA_advance_loc4"; | |
423 | case DW_CFA_offset_extended: | |
424 | return "DW_CFA_offset_extended"; | |
425 | case DW_CFA_restore_extended: | |
426 | return "DW_CFA_restore_extended"; | |
427 | case DW_CFA_undefined: | |
428 | return "DW_CFA_undefined"; | |
429 | case DW_CFA_same_value: | |
430 | return "DW_CFA_same_value"; | |
431 | case DW_CFA_register: | |
432 | return "DW_CFA_register"; | |
433 | case DW_CFA_remember_state: | |
434 | return "DW_CFA_remember_state"; | |
435 | case DW_CFA_restore_state: | |
436 | return "DW_CFA_restore_state"; | |
437 | case DW_CFA_def_cfa: | |
438 | return "DW_CFA_def_cfa"; | |
439 | case DW_CFA_def_cfa_register: | |
440 | return "DW_CFA_def_cfa_register"; | |
441 | case DW_CFA_def_cfa_offset: | |
442 | return "DW_CFA_def_cfa_offset"; | |
7d9d8943 AM |
443 | case DW_CFA_def_cfa_expression: |
444 | return "DW_CFA_def_cfa_expression"; | |
c53aa195 | 445 | |
3f76745e JM |
446 | /* SGI/MIPS specific */ |
447 | case DW_CFA_MIPS_advance_loc8: | |
448 | return "DW_CFA_MIPS_advance_loc8"; | |
c53aa195 JM |
449 | |
450 | /* GNU extensions */ | |
451 | case DW_CFA_GNU_window_save: | |
452 | return "DW_CFA_GNU_window_save"; | |
0021b564 JM |
453 | case DW_CFA_GNU_args_size: |
454 | return "DW_CFA_GNU_args_size"; | |
3f388b42 GK |
455 | case DW_CFA_GNU_negative_offset_extended: |
456 | return "DW_CFA_GNU_negative_offset_extended"; | |
c53aa195 | 457 | |
3f76745e JM |
458 | default: |
459 | return "DW_CFA_<unknown>"; | |
460 | } | |
461 | } | |
a3f97cbb | 462 | |
3f76745e | 463 | /* Return a pointer to a newly allocated Call Frame Instruction. */ |
71dfc51f | 464 | |
3f76745e JM |
465 | static inline dw_cfi_ref |
466 | new_cfi () | |
467 | { | |
468 | register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node)); | |
71dfc51f | 469 | |
3f76745e JM |
470 | cfi->dw_cfi_next = NULL; |
471 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0; | |
472 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0; | |
a3f97cbb | 473 | |
3f76745e JM |
474 | return cfi; |
475 | } | |
a3f97cbb | 476 | |
3f76745e | 477 | /* Add a Call Frame Instruction to list of instructions. */ |
a3f97cbb | 478 | |
3f76745e JM |
479 | static inline void |
480 | add_cfi (list_head, cfi) | |
481 | register dw_cfi_ref *list_head; | |
482 | register dw_cfi_ref cfi; | |
483 | { | |
484 | register dw_cfi_ref *p; | |
a3f97cbb | 485 | |
3f76745e JM |
486 | /* Find the end of the chain. */ |
487 | for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next) | |
488 | ; | |
489 | ||
490 | *p = cfi; | |
a3f97cbb JW |
491 | } |
492 | ||
3f76745e | 493 | /* Generate a new label for the CFI info to refer to. */ |
71dfc51f | 494 | |
c53aa195 | 495 | char * |
3f76745e | 496 | dwarf2out_cfi_label () |
a3f97cbb | 497 | { |
3f76745e JM |
498 | static char label[20]; |
499 | static unsigned long label_num = 0; | |
556273e0 | 500 | |
3f76745e JM |
501 | ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++); |
502 | ASM_OUTPUT_LABEL (asm_out_file, label); | |
503 | ||
504 | return label; | |
a3f97cbb JW |
505 | } |
506 | ||
3f76745e JM |
507 | /* Add CFI to the current fde at the PC value indicated by LABEL if specified, |
508 | or to the CIE if LABEL is NULL. */ | |
71dfc51f | 509 | |
3f76745e JM |
510 | static void |
511 | add_fde_cfi (label, cfi) | |
d3e3972c | 512 | register const char *label; |
3f76745e | 513 | register dw_cfi_ref cfi; |
a3f97cbb | 514 | { |
3f76745e JM |
515 | if (label) |
516 | { | |
517 | register dw_fde_ref fde = &fde_table[fde_table_in_use - 1]; | |
a3f97cbb | 518 | |
3f76745e JM |
519 | if (*label == 0) |
520 | label = dwarf2out_cfi_label (); | |
71dfc51f | 521 | |
3f76745e JM |
522 | if (fde->dw_fde_current_label == NULL |
523 | || strcmp (label, fde->dw_fde_current_label) != 0) | |
524 | { | |
525 | register dw_cfi_ref xcfi; | |
a3f97cbb | 526 | |
3f76745e | 527 | fde->dw_fde_current_label = label = xstrdup (label); |
71dfc51f | 528 | |
3f76745e JM |
529 | /* Set the location counter to the new label. */ |
530 | xcfi = new_cfi (); | |
531 | xcfi->dw_cfi_opc = DW_CFA_advance_loc4; | |
532 | xcfi->dw_cfi_oprnd1.dw_cfi_addr = label; | |
533 | add_cfi (&fde->dw_fde_cfi, xcfi); | |
534 | } | |
71dfc51f | 535 | |
3f76745e JM |
536 | add_cfi (&fde->dw_fde_cfi, cfi); |
537 | } | |
538 | ||
539 | else | |
540 | add_cfi (&cie_cfi_head, cfi); | |
a3f97cbb JW |
541 | } |
542 | ||
3f76745e | 543 | /* Subroutine of lookup_cfa. */ |
71dfc51f | 544 | |
3f76745e | 545 | static inline void |
7d9d8943 | 546 | lookup_cfa_1 (cfi, loc) |
3f76745e | 547 | register dw_cfi_ref cfi; |
7d9d8943 | 548 | register dw_cfa_location *loc; |
a3f97cbb | 549 | { |
3f76745e JM |
550 | switch (cfi->dw_cfi_opc) |
551 | { | |
552 | case DW_CFA_def_cfa_offset: | |
7d9d8943 | 553 | loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset; |
3f76745e JM |
554 | break; |
555 | case DW_CFA_def_cfa_register: | |
7d9d8943 | 556 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
3f76745e JM |
557 | break; |
558 | case DW_CFA_def_cfa: | |
7d9d8943 AM |
559 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
560 | loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset; | |
561 | break; | |
562 | case DW_CFA_def_cfa_expression: | |
563 | get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc); | |
3f76745e | 564 | break; |
e9a25f70 JL |
565 | default: |
566 | break; | |
3f76745e | 567 | } |
a3f97cbb JW |
568 | } |
569 | ||
3f76745e | 570 | /* Find the previous value for the CFA. */ |
71dfc51f | 571 | |
3f76745e | 572 | static void |
7d9d8943 AM |
573 | lookup_cfa (loc) |
574 | register dw_cfa_location *loc; | |
a3f97cbb | 575 | { |
3f76745e JM |
576 | register dw_cfi_ref cfi; |
577 | ||
7d9d8943 AM |
578 | loc->reg = (unsigned long) -1; |
579 | loc->offset = 0; | |
580 | loc->indirect = 0; | |
581 | loc->base_offset = 0; | |
3f76745e JM |
582 | |
583 | for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next) | |
7d9d8943 | 584 | lookup_cfa_1 (cfi, loc); |
3f76745e JM |
585 | |
586 | if (fde_table_in_use) | |
a3f97cbb | 587 | { |
3f76745e JM |
588 | register dw_fde_ref fde = &fde_table[fde_table_in_use - 1]; |
589 | for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next) | |
7d9d8943 | 590 | lookup_cfa_1 (cfi, loc); |
a3f97cbb JW |
591 | } |
592 | } | |
593 | ||
3f76745e | 594 | /* The current rule for calculating the DWARF2 canonical frame address. */ |
7d9d8943 | 595 | dw_cfa_location cfa; |
71dfc51f | 596 | |
3f76745e JM |
597 | /* The register used for saving registers to the stack, and its offset |
598 | from the CFA. */ | |
7d9d8943 | 599 | dw_cfa_location cfa_store; |
3f76745e | 600 | |
0021b564 JM |
601 | /* The running total of the size of arguments pushed onto the stack. */ |
602 | static long args_size; | |
603 | ||
b57d9225 JM |
604 | /* The last args_size we actually output. */ |
605 | static long old_args_size; | |
606 | ||
3f76745e JM |
607 | /* Entry point to update the canonical frame address (CFA). |
608 | LABEL is passed to add_fde_cfi. The value of CFA is now to be | |
609 | calculated from REG+OFFSET. */ | |
610 | ||
611 | void | |
612 | dwarf2out_def_cfa (label, reg, offset) | |
d3e3972c | 613 | register const char *label; |
7d9d8943 AM |
614 | unsigned reg; |
615 | long offset; | |
616 | { | |
617 | dw_cfa_location loc; | |
618 | loc.indirect = 0; | |
619 | loc.base_offset = 0; | |
620 | loc.reg = reg; | |
621 | loc.offset = offset; | |
622 | def_cfa_1 (label, &loc); | |
623 | } | |
624 | ||
770ca8c6 | 625 | /* This routine does the actual work. The CFA is now calculated from |
7d9d8943 AM |
626 | the dw_cfa_location structure. */ |
627 | static void | |
628 | def_cfa_1 (label, loc_p) | |
629 | register const char *label; | |
630 | dw_cfa_location *loc_p; | |
a3f97cbb | 631 | { |
3f76745e | 632 | register dw_cfi_ref cfi; |
7d9d8943 | 633 | dw_cfa_location old_cfa, loc; |
3f76745e | 634 | |
7d9d8943 AM |
635 | cfa = *loc_p; |
636 | loc = *loc_p; | |
5bef9b1f | 637 | |
7d9d8943 AM |
638 | if (cfa_store.reg == loc.reg && loc.indirect == 0) |
639 | cfa_store.offset = loc.offset; | |
3f76745e | 640 | |
7d9d8943 AM |
641 | loc.reg = DWARF_FRAME_REGNUM (loc.reg); |
642 | lookup_cfa (&old_cfa); | |
643 | ||
644 | if (loc.reg == old_cfa.reg && loc.offset == old_cfa.offset && | |
645 | loc.indirect == old_cfa.indirect) | |
646 | { | |
e09bbb25 JM |
647 | if (loc.indirect == 0 |
648 | || loc.base_offset == old_cfa.base_offset) | |
770ca8c6 JO |
649 | /* Nothing changed so no need to issue any call frame |
650 | instructions. */ | |
7d9d8943 | 651 | return; |
7d9d8943 | 652 | } |
3f76745e JM |
653 | |
654 | cfi = new_cfi (); | |
655 | ||
e09bbb25 | 656 | if (loc.reg == old_cfa.reg && !loc.indirect) |
a3f97cbb | 657 | { |
770ca8c6 JO |
658 | /* Construct a "DW_CFA_def_cfa_offset <offset>" instruction, |
659 | indicating the CFA register did not change but the offset | |
660 | did. */ | |
3f76745e | 661 | cfi->dw_cfi_opc = DW_CFA_def_cfa_offset; |
7d9d8943 | 662 | cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset; |
3f76745e | 663 | } |
a3f97cbb | 664 | |
3f76745e | 665 | #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */ |
7d9d8943 | 666 | else if (loc.offset == old_cfa.offset && old_cfa.reg != (unsigned long) -1 |
e09bbb25 | 667 | && !loc.indirect) |
3f76745e | 668 | { |
770ca8c6 JO |
669 | /* Construct a "DW_CFA_def_cfa_register <register>" instruction, |
670 | indicating the CFA register has changed to <register> but the | |
671 | offset has not changed. */ | |
3f76745e | 672 | cfi->dw_cfi_opc = DW_CFA_def_cfa_register; |
7d9d8943 | 673 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; |
3f76745e JM |
674 | } |
675 | #endif | |
a3f97cbb | 676 | |
7d9d8943 | 677 | else if (loc.indirect == 0) |
3f76745e | 678 | { |
770ca8c6 JO |
679 | /* Construct a "DW_CFA_def_cfa <register> <offset>" instruction, |
680 | indicating the CFA register has changed to <register> with | |
681 | the specified offset. */ | |
3f76745e | 682 | cfi->dw_cfi_opc = DW_CFA_def_cfa; |
7d9d8943 AM |
683 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; |
684 | cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset; | |
685 | } | |
686 | else | |
687 | { | |
770ca8c6 JO |
688 | /* Construct a DW_CFA_def_cfa_expression instruction to |
689 | calculate the CFA using a full location expression since no | |
690 | register-offset pair is available. */ | |
556273e0 | 691 | struct dw_loc_descr_struct *loc_list; |
7d9d8943 AM |
692 | cfi->dw_cfi_opc = DW_CFA_def_cfa_expression; |
693 | loc_list = build_cfa_loc (&loc); | |
694 | cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list; | |
a3f97cbb | 695 | } |
3f76745e JM |
696 | |
697 | add_fde_cfi (label, cfi); | |
a3f97cbb JW |
698 | } |
699 | ||
3f76745e JM |
700 | /* Add the CFI for saving a register. REG is the CFA column number. |
701 | LABEL is passed to add_fde_cfi. | |
702 | If SREG is -1, the register is saved at OFFSET from the CFA; | |
703 | otherwise it is saved in SREG. */ | |
71dfc51f | 704 | |
3f76745e JM |
705 | static void |
706 | reg_save (label, reg, sreg, offset) | |
d3e3972c | 707 | register const char *label; |
3f76745e JM |
708 | register unsigned reg; |
709 | register unsigned sreg; | |
710 | register long offset; | |
a3f97cbb | 711 | { |
3f76745e JM |
712 | register dw_cfi_ref cfi = new_cfi (); |
713 | ||
714 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg; | |
715 | ||
85066503 MH |
716 | /* The following comparison is correct. -1 is used to indicate that |
717 | the value isn't a register number. */ | |
718 | if (sreg == (unsigned int) -1) | |
a3f97cbb | 719 | { |
3f76745e JM |
720 | if (reg & ~0x3f) |
721 | /* The register number won't fit in 6 bits, so we have to use | |
722 | the long form. */ | |
723 | cfi->dw_cfi_opc = DW_CFA_offset_extended; | |
724 | else | |
725 | cfi->dw_cfi_opc = DW_CFA_offset; | |
726 | ||
27c35f4b HPN |
727 | #ifdef ENABLE_CHECKING |
728 | { | |
729 | /* If we get an offset that is not a multiple of | |
730 | DWARF_CIE_DATA_ALIGNMENT, there is either a bug in the | |
731 | definition of DWARF_CIE_DATA_ALIGNMENT, or a bug in the machine | |
732 | description. */ | |
733 | long check_offset = offset / DWARF_CIE_DATA_ALIGNMENT; | |
734 | ||
735 | if (check_offset * DWARF_CIE_DATA_ALIGNMENT != offset) | |
736 | abort (); | |
737 | } | |
738 | #endif | |
3f76745e | 739 | offset /= DWARF_CIE_DATA_ALIGNMENT; |
3a88cbd1 | 740 | if (offset < 0) |
3f388b42 GK |
741 | { |
742 | cfi->dw_cfi_opc = DW_CFA_GNU_negative_offset_extended; | |
743 | offset = -offset; | |
744 | } | |
3f76745e JM |
745 | cfi->dw_cfi_oprnd2.dw_cfi_offset = offset; |
746 | } | |
2c849145 JM |
747 | else if (sreg == reg) |
748 | /* We could emit a DW_CFA_same_value in this case, but don't bother. */ | |
749 | return; | |
3f76745e JM |
750 | else |
751 | { | |
752 | cfi->dw_cfi_opc = DW_CFA_register; | |
753 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg; | |
754 | } | |
755 | ||
756 | add_fde_cfi (label, cfi); | |
757 | } | |
758 | ||
c53aa195 JM |
759 | /* Add the CFI for saving a register window. LABEL is passed to reg_save. |
760 | This CFI tells the unwinder that it needs to restore the window registers | |
761 | from the previous frame's window save area. | |
556273e0 | 762 | |
c53aa195 JM |
763 | ??? Perhaps we should note in the CIE where windows are saved (instead of |
764 | assuming 0(cfa)) and what registers are in the window. */ | |
765 | ||
766 | void | |
767 | dwarf2out_window_save (label) | |
d3e3972c | 768 | register const char *label; |
c53aa195 JM |
769 | { |
770 | register dw_cfi_ref cfi = new_cfi (); | |
771 | cfi->dw_cfi_opc = DW_CFA_GNU_window_save; | |
772 | add_fde_cfi (label, cfi); | |
773 | } | |
774 | ||
0021b564 JM |
775 | /* Add a CFI to update the running total of the size of arguments |
776 | pushed onto the stack. */ | |
777 | ||
778 | void | |
779 | dwarf2out_args_size (label, size) | |
d3e3972c | 780 | const char *label; |
0021b564 JM |
781 | long size; |
782 | { | |
b57d9225 JM |
783 | register dw_cfi_ref cfi; |
784 | ||
785 | if (size == old_args_size) | |
786 | return; | |
787 | old_args_size = size; | |
788 | ||
789 | cfi = new_cfi (); | |
0021b564 JM |
790 | cfi->dw_cfi_opc = DW_CFA_GNU_args_size; |
791 | cfi->dw_cfi_oprnd1.dw_cfi_offset = size; | |
792 | add_fde_cfi (label, cfi); | |
793 | } | |
794 | ||
c53aa195 JM |
795 | /* Entry point for saving a register to the stack. REG is the GCC register |
796 | number. LABEL and OFFSET are passed to reg_save. */ | |
3f76745e JM |
797 | |
798 | void | |
799 | dwarf2out_reg_save (label, reg, offset) | |
d3e3972c | 800 | register const char *label; |
3f76745e JM |
801 | register unsigned reg; |
802 | register long offset; | |
803 | { | |
804 | reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset); | |
805 | } | |
806 | ||
c53aa195 JM |
807 | /* Entry point for saving the return address in the stack. |
808 | LABEL and OFFSET are passed to reg_save. */ | |
809 | ||
810 | void | |
811 | dwarf2out_return_save (label, offset) | |
d3e3972c | 812 | register const char *label; |
c53aa195 JM |
813 | register long offset; |
814 | { | |
815 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset); | |
816 | } | |
817 | ||
818 | /* Entry point for saving the return address in a register. | |
819 | LABEL and SREG are passed to reg_save. */ | |
820 | ||
821 | void | |
822 | dwarf2out_return_reg (label, sreg) | |
d3e3972c | 823 | register const char *label; |
c53aa195 JM |
824 | register unsigned sreg; |
825 | { | |
826 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0); | |
827 | } | |
828 | ||
3f76745e JM |
829 | /* Record the initial position of the return address. RTL is |
830 | INCOMING_RETURN_ADDR_RTX. */ | |
831 | ||
832 | static void | |
833 | initial_return_save (rtl) | |
834 | register rtx rtl; | |
835 | { | |
973838fd | 836 | unsigned int reg = (unsigned int) -1; |
3f76745e JM |
837 | long offset = 0; |
838 | ||
839 | switch (GET_CODE (rtl)) | |
840 | { | |
841 | case REG: | |
842 | /* RA is in a register. */ | |
2c849145 | 843 | reg = DWARF_FRAME_REGNUM (REGNO (rtl)); |
3f76745e JM |
844 | break; |
845 | case MEM: | |
846 | /* RA is on the stack. */ | |
847 | rtl = XEXP (rtl, 0); | |
848 | switch (GET_CODE (rtl)) | |
849 | { | |
850 | case REG: | |
3a88cbd1 JL |
851 | if (REGNO (rtl) != STACK_POINTER_REGNUM) |
852 | abort (); | |
3f76745e JM |
853 | offset = 0; |
854 | break; | |
855 | case PLUS: | |
3a88cbd1 JL |
856 | if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM) |
857 | abort (); | |
3f76745e JM |
858 | offset = INTVAL (XEXP (rtl, 1)); |
859 | break; | |
860 | case MINUS: | |
3a88cbd1 JL |
861 | if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM) |
862 | abort (); | |
3f76745e JM |
863 | offset = -INTVAL (XEXP (rtl, 1)); |
864 | break; | |
865 | default: | |
866 | abort (); | |
867 | } | |
868 | break; | |
c53aa195 JM |
869 | case PLUS: |
870 | /* The return address is at some offset from any value we can | |
871 | actually load. For instance, on the SPARC it is in %i7+8. Just | |
872 | ignore the offset for now; it doesn't matter for unwinding frames. */ | |
3a88cbd1 JL |
873 | if (GET_CODE (XEXP (rtl, 1)) != CONST_INT) |
874 | abort (); | |
c53aa195 JM |
875 | initial_return_save (XEXP (rtl, 0)); |
876 | return; | |
a3f97cbb | 877 | default: |
3f76745e | 878 | abort (); |
a3f97cbb | 879 | } |
3f76745e | 880 | |
7d9d8943 | 881 | reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset); |
a3f97cbb JW |
882 | } |
883 | ||
1ba5ae8f AH |
884 | /* Given a SET, calculate the amount of stack adjustment it |
885 | contains. */ | |
886 | ||
5e640c56 AH |
887 | static long |
888 | stack_adjust_offset (pattern) | |
1ba5ae8f AH |
889 | rtx pattern; |
890 | { | |
891 | rtx src = SET_SRC (pattern); | |
892 | rtx dest = SET_DEST (pattern); | |
893 | long offset = 0; | |
894 | enum rtx_code code; | |
895 | ||
896 | if (dest == stack_pointer_rtx) | |
897 | { | |
898 | /* (set (reg sp) (plus (reg sp) (const_int))) */ | |
899 | code = GET_CODE (src); | |
900 | if (! (code == PLUS || code == MINUS) | |
901 | || XEXP (src, 0) != stack_pointer_rtx | |
902 | || GET_CODE (XEXP (src, 1)) != CONST_INT) | |
903 | return 0; | |
904 | ||
905 | offset = INTVAL (XEXP (src, 1)); | |
906 | } | |
907 | else if (GET_CODE (dest) == MEM) | |
908 | { | |
909 | /* (set (mem (pre_dec (reg sp))) (foo)) */ | |
910 | src = XEXP (dest, 0); | |
911 | code = GET_CODE (src); | |
912 | ||
e2134eea JH |
913 | if (! (code == PRE_DEC || code == PRE_INC |
914 | || code == PRE_MODIFY) | |
1ba5ae8f AH |
915 | || XEXP (src, 0) != stack_pointer_rtx) |
916 | return 0; | |
917 | ||
e2134eea JH |
918 | if (code == PRE_MODIFY) |
919 | { | |
920 | rtx val = XEXP (XEXP (src, 1), 1); | |
921 | /* We handle only adjustments by constant amount. */ | |
922 | if (GET_CODE (XEXP (src, 1)) != PLUS || | |
923 | GET_CODE (val) != CONST_INT) | |
924 | abort(); | |
925 | offset = -INTVAL (val); | |
926 | } | |
927 | else offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1ba5ae8f AH |
928 | } |
929 | else | |
930 | return 0; | |
931 | ||
932 | if (code == PLUS || code == PRE_INC) | |
933 | offset = -offset; | |
934 | ||
935 | return offset; | |
936 | } | |
937 | ||
0021b564 JM |
938 | /* Check INSN to see if it looks like a push or a stack adjustment, and |
939 | make a note of it if it does. EH uses this information to find out how | |
940 | much extra space it needs to pop off the stack. */ | |
941 | ||
942 | static void | |
943 | dwarf2out_stack_adjust (insn) | |
944 | rtx insn; | |
945 | { | |
0021b564 | 946 | long offset; |
d3e3972c | 947 | const char *label; |
0021b564 | 948 | |
b57d9225 JM |
949 | if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN) |
950 | { | |
951 | /* Extract the size of the args from the CALL rtx itself. */ | |
952 | ||
953 | insn = PATTERN (insn); | |
954 | if (GET_CODE (insn) == PARALLEL) | |
955 | insn = XVECEXP (insn, 0, 0); | |
956 | if (GET_CODE (insn) == SET) | |
957 | insn = SET_SRC (insn); | |
3db35af4 MM |
958 | if (GET_CODE (insn) != CALL) |
959 | abort (); | |
b57d9225 JM |
960 | dwarf2out_args_size ("", INTVAL (XEXP (insn, 1))); |
961 | return; | |
962 | } | |
963 | ||
964 | /* If only calls can throw, and we have a frame pointer, | |
965 | save up adjustments until we see the CALL_INSN. */ | |
966 | else if (! asynchronous_exceptions | |
7d9d8943 | 967 | && cfa.reg != STACK_POINTER_REGNUM) |
b57d9225 JM |
968 | return; |
969 | ||
6020d360 | 970 | if (GET_CODE (insn) == BARRIER) |
0021b564 | 971 | { |
6020d360 JM |
972 | /* When we see a BARRIER, we know to reset args_size to 0. Usually |
973 | the compiler will have already emitted a stack adjustment, but | |
974 | doesn't bother for calls to noreturn functions. */ | |
975 | #ifdef STACK_GROWS_DOWNWARD | |
976 | offset = -args_size; | |
977 | #else | |
978 | offset = args_size; | |
979 | #endif | |
0021b564 | 980 | } |
6020d360 | 981 | else if (GET_CODE (PATTERN (insn)) == SET) |
0021b564 | 982 | { |
1ba5ae8f AH |
983 | offset = stack_adjust_offset (PATTERN (insn)); |
984 | } | |
985 | else if (GET_CODE (PATTERN (insn)) == PARALLEL | |
986 | || GET_CODE (PATTERN (insn)) == SEQUENCE) | |
987 | { | |
988 | /* There may be stack adjustments inside compound insns. Search | |
989 | for them. */ | |
990 | int j; | |
0021b564 | 991 | |
1ba5ae8f AH |
992 | offset = 0; |
993 | for (j = XVECLEN (PATTERN (insn), 0) - 1; j >= 0; j--) | |
6020d360 | 994 | { |
1ba5ae8f AH |
995 | rtx pattern = XVECEXP (PATTERN (insn), 0, j); |
996 | if (GET_CODE (pattern) == SET) | |
997 | offset += stack_adjust_offset (pattern); | |
6020d360 | 998 | } |
0021b564 JM |
999 | } |
1000 | else | |
1001 | return; | |
0b34cf1e | 1002 | |
6020d360 JM |
1003 | if (offset == 0) |
1004 | return; | |
1005 | ||
7d9d8943 AM |
1006 | if (cfa.reg == STACK_POINTER_REGNUM) |
1007 | cfa.offset += offset; | |
0021b564 JM |
1008 | |
1009 | #ifndef STACK_GROWS_DOWNWARD | |
1010 | offset = -offset; | |
1011 | #endif | |
1012 | args_size += offset; | |
1013 | if (args_size < 0) | |
1014 | args_size = 0; | |
1015 | ||
1016 | label = dwarf2out_cfi_label (); | |
7d9d8943 | 1017 | def_cfa_1 (label, &cfa); |
0021b564 JM |
1018 | dwarf2out_args_size (label, args_size); |
1019 | } | |
1020 | ||
770ca8c6 JO |
1021 | /* A temporary register holding an integral value used in adjusting SP |
1022 | or setting up the store_reg. The "offset" field holds the integer | |
1023 | value, not an offset. */ | |
1024 | dw_cfa_location cfa_temp; | |
1025 | ||
1026 | /* Record call frame debugging information for an expression EXPR, | |
1027 | which either sets SP or FP (adjusting how we calculate the frame | |
1028 | address) or saves a register to the stack. LABEL indicates the | |
1029 | address of EXPR. | |
1030 | ||
1031 | This function encodes a state machine mapping rtxes to actions on | |
1032 | cfa, cfa_store, and cfa_temp.reg. We describe these rules so | |
1033 | users need not read the source code. | |
1034 | ||
a401107d JO |
1035 | The High-Level Picture |
1036 | ||
1037 | Changes in the register we use to calculate the CFA: Currently we | |
1038 | assume that if you copy the CFA register into another register, we | |
1039 | should take the other one as the new CFA register; this seems to | |
1040 | work pretty well. If it's wrong for some target, it's simple | |
1041 | enough not to set RTX_FRAME_RELATED_P on the insn in question. | |
1042 | ||
1043 | Changes in the register we use for saving registers to the stack: | |
1044 | This is usually SP, but not always. Again, we deduce that if you | |
1045 | copy SP into another register (and SP is not the CFA register), | |
1046 | then the new register is the one we will be using for register | |
1047 | saves. This also seems to work. | |
1048 | ||
1049 | Register saves: There's not much guesswork about this one; if | |
1050 | RTX_FRAME_RELATED_P is set on an insn which modifies memory, it's a | |
1051 | register save, and the register used to calculate the destination | |
1052 | had better be the one we think we're using for this purpose. | |
1053 | ||
1054 | Except: If the register being saved is the CFA register, and the | |
1055 | offset is non-zero, we are saving the CFA, so we assume we have to | |
1056 | use DW_CFA_def_cfa_expression. If the offset is 0, we assume that | |
1057 | the intent is to save the value of SP from the previous frame. | |
1058 | ||
770ca8c6 JO |
1059 | Invariants / Summaries of Rules |
1060 | ||
a401107d JO |
1061 | cfa current rule for calculating the CFA. It usually |
1062 | consists of a register and an offset. | |
770ca8c6 JO |
1063 | cfa_store register used by prologue code to save things to the stack |
1064 | cfa_store.offset is the offset from the value of | |
1065 | cfa_store.reg to the actual CFA | |
1066 | cfa_temp register holding an integral value. cfa_temp.offset | |
1067 | stores the value, which will be used to adjust the | |
1068 | stack pointer. | |
1069 | ||
1070 | Rules 1- 4: Setting a register's value to cfa.reg or an expression | |
1071 | with cfa.reg as the first operand changes the cfa.reg and its | |
1072 | cfa.offset. | |
770ca8c6 JO |
1073 | |
1074 | Rules 6- 9: Set a non-cfa.reg register value to a constant or an | |
1075 | expression yielding a constant. This sets cfa_temp.reg | |
1076 | and cfa_temp.offset. | |
1077 | ||
1078 | Rule 5: Create a new register cfa_store used to save items to the | |
1079 | stack. | |
1080 | ||
a401107d JO |
1081 | Rules 10-13: Save a register to the stack. Define offset as the |
1082 | difference of the original location and cfa_store's | |
1083 | location. | |
770ca8c6 JO |
1084 | |
1085 | The Rules | |
1086 | ||
1087 | "{a,b}" indicates a choice of a xor b. | |
1088 | "<reg>:cfa.reg" indicates that <reg> must equal cfa.reg. | |
1089 | ||
1090 | Rule 1: | |
1091 | (set <reg1> <reg2>:cfa.reg) | |
1092 | effects: cfa.reg = <REG1> | |
1093 | cfa.offset unchanged | |
1094 | ||
1095 | Rule 2: | |
1096 | (set sp ({minus,plus} {sp,fp}:cfa.reg {<const_int>,<reg>:cfa_temp.reg})) | |
1097 | effects: cfa.reg = sp if fp used | |
1098 | cfa.offset += {+/- <const_int>, cfa_temp.offset} if cfa.reg==sp | |
1099 | cfa_store.offset += {+/- <const_int>, cfa_temp.offset} | |
1100 | if cfa_store.reg==sp | |
1101 | ||
1102 | Rule 3: | |
1103 | (set fp ({minus,plus} <reg>:cfa.reg <const_int>)) | |
1104 | effects: cfa.reg = fp | |
1105 | cfa_offset += +/- <const_int> | |
1106 | ||
1107 | Rule 4: | |
1108 | (set <reg1> (plus <reg2>:cfa.reg <const_int>)) | |
1109 | constraints: <reg1> != fp | |
1110 | <reg1> != sp | |
1111 | effects: cfa.reg = <reg1> | |
770ca8c6 JO |
1112 | |
1113 | Rule 5: | |
1114 | (set <reg1> (plus <reg2>:cfa_temp.reg sp:cfa.reg)) | |
1115 | constraints: <reg1> != fp | |
1116 | <reg1> != sp | |
1117 | effects: cfa_store.reg = <reg1> | |
1118 | cfa_store.offset = cfa.offset - cfa_temp.offset | |
1119 | ||
1120 | Rule 6: | |
1121 | (set <reg> <const_int>) | |
1122 | effects: cfa_temp.reg = <reg> | |
1123 | cfa_temp.offset = <const_int> | |
1124 | ||
1125 | Rule 7: | |
1126 | (set <reg1>:cfa_temp.reg (ior <reg2>:cfa_temp.reg <const_int>)) | |
1127 | effects: cfa_temp.reg = <reg1> | |
1128 | cfa_temp.offset |= <const_int> | |
1129 | ||
1130 | Rule 8: | |
1131 | (set <reg> (high <exp>)) | |
1132 | effects: none | |
1133 | ||
1134 | Rule 9: | |
1135 | (set <reg> (lo_sum <exp> <const_int>)) | |
1136 | effects: cfa_temp.reg = <reg> | |
1137 | cfa_temp.offset = <const_int> | |
1138 | ||
1139 | Rule 10: | |
1140 | (set (mem (pre_modify sp:cfa_store (???? <reg1> <const_int>))) <reg2>) | |
1141 | effects: cfa_store.offset -= <const_int> | |
1142 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
1143 | offset = -cfa_store.offset | |
1144 | cfa.reg = sp | |
1145 | cfa.base_offset = offset | |
1146 | ||
1147 | Rule 11: | |
1148 | (set (mem ({pre_inc,pre_dec} sp:cfa_store.reg)) <reg>) | |
1149 | effects: cfa_store.offset += -/+ mode_size(mem) | |
1150 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
1151 | offset = -cfa_store.offset | |
1152 | cfa.reg = sp | |
1153 | cfa.base_offset = offset | |
1154 | ||
1155 | Rule 12: | |
1156 | (set (mem ({minus,plus} <reg1>:cfa_store <const_int>)) <reg2>) | |
1157 | effects: cfa_store.offset += -/+ <const_int> | |
1158 | offset = -cfa_store.offset | |
1159 | cfa.reg = <reg1 | |
1160 | cfa.base_offset = offset | |
1161 | ||
1162 | Rule 13: | |
1163 | (set (mem <reg1>:cfa_store) <reg2>) | |
1164 | effects: offset = -cfa_store.offset | |
1165 | cfa.reg = <reg1> | |
1166 | cfa.base_offset = offset */ | |
b664de3a AM |
1167 | |
1168 | static void | |
1169 | dwarf2out_frame_debug_expr (expr, label) | |
1170 | rtx expr; | |
d3e3972c | 1171 | const char *label; |
b664de3a AM |
1172 | { |
1173 | rtx src, dest; | |
1174 | long offset; | |
556273e0 KH |
1175 | |
1176 | /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of | |
1177 | the PARALLEL independently. The first element is always processed if | |
770ca8c6 | 1178 | it is a SET. This is for backward compatibility. Other elements |
556273e0 KH |
1179 | are processed only if they are SETs and the RTX_FRAME_RELATED_P |
1180 | flag is set in them. */ | |
b664de3a | 1181 | |
79d13342 NC |
1182 | if (GET_CODE (expr) == PARALLEL |
1183 | || GET_CODE (expr) == SEQUENCE) | |
556273e0 | 1184 | { |
b664de3a AM |
1185 | int par_index; |
1186 | int limit = XVECLEN (expr, 0); | |
1187 | ||
1188 | for (par_index = 0; par_index < limit; par_index++) | |
556273e0 KH |
1189 | { |
1190 | rtx x = XVECEXP (expr, 0, par_index); | |
1191 | ||
1192 | if (GET_CODE (x) == SET && | |
b664de3a | 1193 | (RTX_FRAME_RELATED_P (x) || par_index == 0)) |
2618f955 | 1194 | dwarf2out_frame_debug_expr (x, label); |
556273e0 | 1195 | } |
b664de3a AM |
1196 | return; |
1197 | } | |
556273e0 | 1198 | |
b664de3a AM |
1199 | if (GET_CODE (expr) != SET) |
1200 | abort (); | |
1201 | ||
1202 | src = SET_SRC (expr); | |
1203 | dest = SET_DEST (expr); | |
1204 | ||
1205 | switch (GET_CODE (dest)) | |
1206 | { | |
1207 | case REG: | |
770ca8c6 | 1208 | /* Rule 1 */ |
b664de3a AM |
1209 | /* Update the CFA rule wrt SP or FP. Make sure src is |
1210 | relative to the current CFA register. */ | |
1211 | switch (GET_CODE (src)) | |
556273e0 KH |
1212 | { |
1213 | /* Setting FP from SP. */ | |
1214 | case REG: | |
1215 | if (cfa.reg == (unsigned) REGNO (src)) | |
1216 | /* OK. */ | |
1217 | ; | |
626d1efd | 1218 | else |
556273e0 | 1219 | abort (); |
2c849145 JM |
1220 | |
1221 | /* We used to require that dest be either SP or FP, but the | |
1222 | ARM copies SP to a temporary register, and from there to | |
1223 | FP. So we just rely on the backends to only set | |
1224 | RTX_FRAME_RELATED_P on appropriate insns. */ | |
556273e0 KH |
1225 | cfa.reg = REGNO (dest); |
1226 | break; | |
b664de3a | 1227 | |
556273e0 KH |
1228 | case PLUS: |
1229 | case MINUS: | |
1230 | if (dest == stack_pointer_rtx) | |
1231 | { | |
770ca8c6 | 1232 | /* Rule 2 */ |
2618f955 MM |
1233 | /* Adjusting SP. */ |
1234 | switch (GET_CODE (XEXP (src, 1))) | |
1235 | { | |
1236 | case CONST_INT: | |
1237 | offset = INTVAL (XEXP (src, 1)); | |
1238 | break; | |
1239 | case REG: | |
770ca8c6 | 1240 | if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp.reg) |
2618f955 | 1241 | abort (); |
770ca8c6 | 1242 | offset = cfa_temp.offset; |
2618f955 MM |
1243 | break; |
1244 | default: | |
1245 | abort (); | |
1246 | } | |
1247 | ||
1248 | if (XEXP (src, 0) == hard_frame_pointer_rtx) | |
1249 | { | |
1250 | /* Restoring SP from FP in the epilogue. */ | |
7d9d8943 | 1251 | if (cfa.reg != (unsigned) HARD_FRAME_POINTER_REGNUM) |
2618f955 | 1252 | abort (); |
7d9d8943 | 1253 | cfa.reg = STACK_POINTER_REGNUM; |
2618f955 MM |
1254 | } |
1255 | else if (XEXP (src, 0) != stack_pointer_rtx) | |
1256 | abort (); | |
1257 | ||
1258 | if (GET_CODE (src) == PLUS) | |
1259 | offset = -offset; | |
7d9d8943 AM |
1260 | if (cfa.reg == STACK_POINTER_REGNUM) |
1261 | cfa.offset += offset; | |
1262 | if (cfa_store.reg == STACK_POINTER_REGNUM) | |
1263 | cfa_store.offset += offset; | |
556273e0 KH |
1264 | } |
1265 | else if (dest == hard_frame_pointer_rtx) | |
1266 | { | |
770ca8c6 | 1267 | /* Rule 3 */ |
2618f955 MM |
1268 | /* Either setting the FP from an offset of the SP, |
1269 | or adjusting the FP */ | |
2c849145 | 1270 | if (! frame_pointer_needed) |
2618f955 MM |
1271 | abort (); |
1272 | ||
2c849145 | 1273 | if (GET_CODE (XEXP (src, 0)) == REG |
7d9d8943 | 1274 | && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg |
2618f955 MM |
1275 | && GET_CODE (XEXP (src, 1)) == CONST_INT) |
1276 | { | |
2618f955 MM |
1277 | offset = INTVAL (XEXP (src, 1)); |
1278 | if (GET_CODE (src) == PLUS) | |
1279 | offset = -offset; | |
7d9d8943 AM |
1280 | cfa.offset += offset; |
1281 | cfa.reg = HARD_FRAME_POINTER_REGNUM; | |
2618f955 | 1282 | } |
556273e0 KH |
1283 | else |
1284 | abort (); | |
1285 | } | |
1286 | else | |
1287 | { | |
b53ef1a2 | 1288 | if (GET_CODE (src) != PLUS) |
2618f955 | 1289 | abort (); |
b53ef1a2 | 1290 | |
770ca8c6 | 1291 | /* Rule 4 */ |
b53ef1a2 NC |
1292 | if (GET_CODE (XEXP (src, 0)) == REG |
1293 | && REGNO (XEXP (src, 0)) == cfa.reg | |
1294 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
34ce3d7b JM |
1295 | { |
1296 | /* Setting a temporary CFA register that will be copied | |
1297 | into the FP later on. */ | |
1298 | offset = INTVAL (XEXP (src, 1)); | |
1299 | if (GET_CODE (src) == PLUS) | |
1300 | offset = -offset; | |
1301 | cfa.offset += offset; | |
1302 | cfa.reg = REGNO (dest); | |
1303 | } | |
770ca8c6 | 1304 | /* Rule 5 */ |
b53ef1a2 NC |
1305 | else |
1306 | { | |
00a42e21 JM |
1307 | /* Setting a scratch register that we will use instead |
1308 | of SP for saving registers to the stack. */ | |
b53ef1a2 NC |
1309 | if (XEXP (src, 1) != stack_pointer_rtx) |
1310 | abort (); | |
1311 | if (GET_CODE (XEXP (src, 0)) != REG | |
770ca8c6 | 1312 | || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp.reg) |
b53ef1a2 NC |
1313 | abort (); |
1314 | if (cfa.reg != STACK_POINTER_REGNUM) | |
1315 | abort (); | |
1316 | cfa_store.reg = REGNO (dest); | |
770ca8c6 | 1317 | cfa_store.offset = cfa.offset - cfa_temp.offset; |
b53ef1a2 | 1318 | } |
556273e0 KH |
1319 | } |
1320 | break; | |
b664de3a | 1321 | |
770ca8c6 | 1322 | /* Rule 6 */ |
556273e0 | 1323 | case CONST_INT: |
770ca8c6 JO |
1324 | cfa_temp.reg = REGNO (dest); |
1325 | cfa_temp.offset = INTVAL (src); | |
556273e0 | 1326 | break; |
b664de3a | 1327 | |
770ca8c6 | 1328 | /* Rule 7 */ |
556273e0 KH |
1329 | case IOR: |
1330 | if (GET_CODE (XEXP (src, 0)) != REG | |
770ca8c6 | 1331 | || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp.reg |
2618f955 | 1332 | || GET_CODE (XEXP (src, 1)) != CONST_INT) |
556273e0 | 1333 | abort (); |
770ca8c6 JO |
1334 | if ((unsigned) REGNO (dest) != cfa_temp.reg) |
1335 | cfa_temp.reg = REGNO (dest); | |
1336 | cfa_temp.offset |= INTVAL (XEXP (src, 1)); | |
556273e0 | 1337 | break; |
b664de3a | 1338 | |
556273e0 KH |
1339 | default: |
1340 | abort (); | |
1341 | } | |
7d9d8943 | 1342 | def_cfa_1 (label, &cfa); |
2618f955 | 1343 | break; |
b664de3a | 1344 | |
ab577d8a MM |
1345 | /* Skip over HIGH, assuming it will be followed by a LO_SUM, which |
1346 | will fill in all of the bits. */ | |
770ca8c6 | 1347 | /* Rule 8 */ |
ab577d8a MM |
1348 | case HIGH: |
1349 | break; | |
1350 | ||
770ca8c6 | 1351 | /* Rule 9 */ |
ab577d8a | 1352 | case LO_SUM: |
770ca8c6 JO |
1353 | if (GET_CODE (XEXP (src, 1)) != CONST_INT) |
1354 | abort (); | |
1355 | cfa_temp.reg = REGNO (dest); | |
1356 | cfa_temp.offset = INTVAL (XEXP (src, 1)); | |
ab577d8a MM |
1357 | break; |
1358 | ||
2618f955 | 1359 | case MEM: |
2618f955 MM |
1360 | if (GET_CODE (src) != REG) |
1361 | abort (); | |
7d9d8943 | 1362 | |
7d9d8943 AM |
1363 | /* Saving a register to the stack. Make sure dest is relative to the |
1364 | CFA register. */ | |
2618f955 MM |
1365 | switch (GET_CODE (XEXP (dest, 0))) |
1366 | { | |
770ca8c6 | 1367 | /* Rule 10 */ |
2618f955 | 1368 | /* With a push. */ |
e2134eea JH |
1369 | case PRE_MODIFY: |
1370 | /* We can't handle variable size modifications. */ | |
1371 | if (GET_CODE (XEXP (XEXP (XEXP (dest, 0), 1), 1)) != CONST_INT) | |
1372 | abort(); | |
1373 | offset = -INTVAL (XEXP (XEXP (XEXP (dest, 0), 1), 1)); | |
1374 | ||
1375 | if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM | |
1376 | || cfa_store.reg != STACK_POINTER_REGNUM) | |
1377 | abort (); | |
1378 | cfa_store.offset += offset; | |
1379 | if (cfa.reg == STACK_POINTER_REGNUM) | |
1380 | cfa.offset = cfa_store.offset; | |
1381 | ||
1382 | offset = -cfa_store.offset; | |
1383 | break; | |
770ca8c6 | 1384 | /* Rule 11 */ |
2618f955 MM |
1385 | case PRE_INC: |
1386 | case PRE_DEC: | |
1387 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1388 | if (GET_CODE (XEXP (dest, 0)) == PRE_INC) | |
1389 | offset = -offset; | |
b664de3a | 1390 | |
2618f955 | 1391 | if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM |
7d9d8943 | 1392 | || cfa_store.reg != STACK_POINTER_REGNUM) |
2618f955 | 1393 | abort (); |
7d9d8943 AM |
1394 | cfa_store.offset += offset; |
1395 | if (cfa.reg == STACK_POINTER_REGNUM) | |
1396 | cfa.offset = cfa_store.offset; | |
b664de3a | 1397 | |
7d9d8943 | 1398 | offset = -cfa_store.offset; |
2618f955 | 1399 | break; |
b664de3a | 1400 | |
770ca8c6 | 1401 | /* Rule 12 */ |
2618f955 MM |
1402 | /* With an offset. */ |
1403 | case PLUS: | |
1404 | case MINUS: | |
770ca8c6 JO |
1405 | if (GET_CODE (XEXP (XEXP (dest, 0), 1)) != CONST_INT) |
1406 | abort (); | |
2618f955 MM |
1407 | offset = INTVAL (XEXP (XEXP (dest, 0), 1)); |
1408 | if (GET_CODE (XEXP (dest, 0)) == MINUS) | |
1409 | offset = -offset; | |
b664de3a | 1410 | |
7d9d8943 | 1411 | if (cfa_store.reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0))) |
2618f955 | 1412 | abort (); |
7d9d8943 | 1413 | offset -= cfa_store.offset; |
2618f955 MM |
1414 | break; |
1415 | ||
770ca8c6 | 1416 | /* Rule 13 */ |
2618f955 MM |
1417 | /* Without an offset. */ |
1418 | case REG: | |
7d9d8943 | 1419 | if (cfa_store.reg != (unsigned) REGNO (XEXP (dest, 0))) |
556273e0 | 1420 | abort (); |
7d9d8943 | 1421 | offset = -cfa_store.offset; |
2618f955 MM |
1422 | break; |
1423 | ||
1424 | default: | |
1425 | abort (); | |
1426 | } | |
e09bbb25 | 1427 | |
556273e0 | 1428 | if (REGNO (src) != STACK_POINTER_REGNUM |
e09bbb25 JM |
1429 | && REGNO (src) != HARD_FRAME_POINTER_REGNUM |
1430 | && (unsigned) REGNO (src) == cfa.reg) | |
1431 | { | |
1432 | /* We're storing the current CFA reg into the stack. */ | |
1433 | ||
1434 | if (cfa.offset == 0) | |
1435 | { | |
1436 | /* If the source register is exactly the CFA, assume | |
1437 | we're saving SP like any other register; this happens | |
1438 | on the ARM. */ | |
1439 | ||
1440 | def_cfa_1 (label, &cfa); | |
1441 | dwarf2out_reg_save (label, STACK_POINTER_REGNUM, offset); | |
1442 | break; | |
1443 | } | |
1444 | else | |
1445 | { | |
1446 | /* Otherwise, we'll need to look in the stack to | |
1447 | calculate the CFA. */ | |
1448 | ||
1449 | rtx x = XEXP (dest, 0); | |
1450 | if (GET_CODE (x) != REG) | |
1451 | x = XEXP (x, 0); | |
1452 | if (GET_CODE (x) != REG) | |
1453 | abort (); | |
1454 | cfa.reg = (unsigned) REGNO (x); | |
1455 | cfa.base_offset = offset; | |
1456 | cfa.indirect = 1; | |
1457 | def_cfa_1 (label, &cfa); | |
1458 | break; | |
1459 | } | |
1460 | } | |
1461 | ||
7d9d8943 | 1462 | def_cfa_1 (label, &cfa); |
2618f955 MM |
1463 | dwarf2out_reg_save (label, REGNO (src), offset); |
1464 | break; | |
1465 | ||
1466 | default: | |
1467 | abort (); | |
1468 | } | |
b664de3a AM |
1469 | } |
1470 | ||
3f76745e JM |
1471 | /* Record call frame debugging information for INSN, which either |
1472 | sets SP or FP (adjusting how we calculate the frame address) or saves a | |
1473 | register to the stack. If INSN is NULL_RTX, initialize our state. */ | |
71dfc51f | 1474 | |
3f76745e JM |
1475 | void |
1476 | dwarf2out_frame_debug (insn) | |
1477 | rtx insn; | |
a3f97cbb | 1478 | { |
d3e3972c | 1479 | const char *label; |
b664de3a | 1480 | rtx src; |
3f76745e JM |
1481 | |
1482 | if (insn == NULL_RTX) | |
a3f97cbb | 1483 | { |
3f76745e | 1484 | /* Set up state for generating call frame debug info. */ |
7d9d8943 AM |
1485 | lookup_cfa (&cfa); |
1486 | if (cfa.reg != (unsigned long) DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM)) | |
3a88cbd1 | 1487 | abort (); |
7d9d8943 AM |
1488 | cfa.reg = STACK_POINTER_REGNUM; |
1489 | cfa_store = cfa; | |
770ca8c6 JO |
1490 | cfa_temp.reg = -1; |
1491 | cfa_temp.offset = 0; | |
3f76745e JM |
1492 | return; |
1493 | } | |
1494 | ||
0021b564 JM |
1495 | if (! RTX_FRAME_RELATED_P (insn)) |
1496 | { | |
6020d360 | 1497 | dwarf2out_stack_adjust (insn); |
0021b564 JM |
1498 | return; |
1499 | } | |
1500 | ||
3f76745e | 1501 | label = dwarf2out_cfi_label (); |
556273e0 | 1502 | |
07ebc930 RH |
1503 | src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX); |
1504 | if (src) | |
1505 | insn = XEXP (src, 0); | |
556273e0 | 1506 | else |
07ebc930 RH |
1507 | insn = PATTERN (insn); |
1508 | ||
b664de3a | 1509 | dwarf2out_frame_debug_expr (insn, label); |
3f76745e JM |
1510 | } |
1511 | ||
3f76745e JM |
1512 | /* Output a Call Frame Information opcode and its operand(s). */ |
1513 | ||
1514 | static void | |
1515 | output_cfi (cfi, fde) | |
1516 | register dw_cfi_ref cfi; | |
1517 | register dw_fde_ref fde; | |
1518 | { | |
1519 | if (cfi->dw_cfi_opc == DW_CFA_advance_loc) | |
1520 | { | |
2e4b9b8c RH |
1521 | dw2_asm_output_data (1, (cfi->dw_cfi_opc |
1522 | | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f)), | |
1523 | "DW_CFA_advance_loc 0x%lx", | |
1524 | cfi->dw_cfi_oprnd1.dw_cfi_offset); | |
3f76745e | 1525 | } |
3f76745e JM |
1526 | else if (cfi->dw_cfi_opc == DW_CFA_offset) |
1527 | { | |
2e4b9b8c RH |
1528 | dw2_asm_output_data (1, (cfi->dw_cfi_opc |
1529 | | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f)), | |
1530 | "DW_CFA_offset, column 0x%lx", | |
1531 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num); | |
1532 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); | |
3f76745e JM |
1533 | } |
1534 | else if (cfi->dw_cfi_opc == DW_CFA_restore) | |
1535 | { | |
2e4b9b8c RH |
1536 | dw2_asm_output_data (1, (cfi->dw_cfi_opc |
1537 | | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f)), | |
1538 | "DW_CFA_restore, column 0x%lx", | |
1539 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num); | |
3f76745e JM |
1540 | } |
1541 | else | |
1542 | { | |
2e4b9b8c RH |
1543 | dw2_asm_output_data (1, cfi->dw_cfi_opc, |
1544 | "%s", dwarf_cfi_name (cfi->dw_cfi_opc)); | |
3f76745e | 1545 | |
3f76745e JM |
1546 | switch (cfi->dw_cfi_opc) |
1547 | { | |
1548 | case DW_CFA_set_loc: | |
2e4b9b8c RH |
1549 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, |
1550 | cfi->dw_cfi_oprnd1.dw_cfi_addr, NULL); | |
3f76745e JM |
1551 | break; |
1552 | case DW_CFA_advance_loc1: | |
2e4b9b8c RH |
1553 | dw2_asm_output_delta (1, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1554 | fde->dw_fde_current_label, NULL); | |
bb727b5a | 1555 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
3f76745e JM |
1556 | break; |
1557 | case DW_CFA_advance_loc2: | |
2e4b9b8c RH |
1558 | dw2_asm_output_delta (2, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1559 | fde->dw_fde_current_label, NULL); | |
3f76745e JM |
1560 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
1561 | break; | |
1562 | case DW_CFA_advance_loc4: | |
2e4b9b8c RH |
1563 | dw2_asm_output_delta (4, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1564 | fde->dw_fde_current_label, NULL); | |
3f76745e JM |
1565 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
1566 | break; | |
3f76745e | 1567 | case DW_CFA_MIPS_advance_loc8: |
2e4b9b8c RH |
1568 | dw2_asm_output_delta (8, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
1569 | fde->dw_fde_current_label, NULL); | |
1570 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; | |
3f76745e | 1571 | break; |
3f76745e | 1572 | case DW_CFA_offset_extended: |
3f388b42 | 1573 | case DW_CFA_GNU_negative_offset_extended: |
3f76745e | 1574 | case DW_CFA_def_cfa: |
2e4b9b8c RH |
1575 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, NULL); |
1576 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); | |
3f76745e JM |
1577 | break; |
1578 | case DW_CFA_restore_extended: | |
1579 | case DW_CFA_undefined: | |
3f76745e JM |
1580 | case DW_CFA_same_value: |
1581 | case DW_CFA_def_cfa_register: | |
2e4b9b8c | 1582 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, NULL); |
3f76745e JM |
1583 | break; |
1584 | case DW_CFA_register: | |
2e4b9b8c RH |
1585 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, NULL); |
1586 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num, NULL); | |
3f76745e JM |
1587 | break; |
1588 | case DW_CFA_def_cfa_offset: | |
2e4b9b8c RH |
1589 | case DW_CFA_GNU_args_size: |
1590 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset, NULL); | |
3f76745e | 1591 | break; |
c53aa195 JM |
1592 | case DW_CFA_GNU_window_save: |
1593 | break; | |
7d9d8943 AM |
1594 | case DW_CFA_def_cfa_expression: |
1595 | output_cfa_loc (cfi); | |
1596 | break; | |
3f76745e JM |
1597 | default: |
1598 | break; | |
1599 | } | |
556273e0 | 1600 | } |
3f76745e JM |
1601 | } |
1602 | ||
1603 | /* Output the call frame information used to used to record information | |
1604 | that relates to calculating the frame pointer, and records the | |
1605 | location of saved registers. */ | |
1606 | ||
1607 | static void | |
1608 | output_call_frame_info (for_eh) | |
1609 | int for_eh; | |
1610 | { | |
2d8b0f3a | 1611 | register unsigned long i; |
3f76745e | 1612 | register dw_fde_ref fde; |
3f76745e | 1613 | register dw_cfi_ref cfi; |
a6ab3aad | 1614 | char l1[20], l2[20]; |
2ed2af28 PDM |
1615 | #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL |
1616 | char ld[20]; | |
1617 | #endif | |
a6ab3aad JM |
1618 | |
1619 | /* Do we want to include a pointer to the exception table? */ | |
1620 | int eh_ptr = for_eh && exception_table_p (); | |
3f76745e | 1621 | |
737faf14 JM |
1622 | /* If we don't have any functions we'll want to unwind out of, don't |
1623 | emit any EH unwind information. */ | |
1624 | if (for_eh) | |
1625 | { | |
1626 | for (i = 0; i < fde_table_in_use; ++i) | |
1627 | if (! fde_table[i].nothrow) | |
1628 | goto found; | |
1629 | return; | |
1630 | found:; | |
1631 | } | |
1632 | ||
aa0c1401 JL |
1633 | /* We're going to be generating comments, so turn on app. */ |
1634 | if (flag_debug_asm) | |
1635 | app_enable (); | |
956d6950 | 1636 | |
3f76745e JM |
1637 | if (for_eh) |
1638 | { | |
1639 | #ifdef EH_FRAME_SECTION | |
0021b564 | 1640 | EH_FRAME_SECTION (); |
3f76745e | 1641 | #else |
496651db | 1642 | tree label = get_file_function_name ('F'); |
0021b564 | 1643 | |
3167de5b | 1644 | force_data_section (); |
a1a4189d | 1645 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE)); |
0021b564 JM |
1646 | ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label)); |
1647 | ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label)); | |
3f76745e JM |
1648 | #endif |
1649 | assemble_label ("__FRAME_BEGIN__"); | |
1650 | } | |
1651 | else | |
1652 | ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION); | |
1653 | ||
556273e0 | 1654 | /* Output the CIE. */ |
a6ab3aad JM |
1655 | ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh); |
1656 | ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh); | |
2ed2af28 PDM |
1657 | #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL |
1658 | ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh); | |
2e4b9b8c RH |
1659 | dw2_asm_output_offset (for_eh ? 4 : DWARF_OFFSET_SIZE, ld, |
1660 | "Length of Common Information Entry"); | |
2ed2af28 | 1661 | #else |
2e4b9b8c RH |
1662 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
1663 | "Length of Common Information Entry"); | |
2ed2af28 | 1664 | #endif |
a6ab3aad JM |
1665 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
1666 | ||
2e4b9b8c RH |
1667 | /* Now that the CIE pointer is PC-relative for EH, |
1668 | use 0 to identify the CIE. */ | |
1669 | dw2_asm_output_data ((for_eh ? 4 : DWARF_OFFSET_SIZE), | |
1670 | (for_eh ? 0 : DW_CIE_ID), | |
1671 | "CIE Identifier Tag"); | |
3f76745e | 1672 | |
2e4b9b8c | 1673 | dw2_asm_output_data (1, DW_CIE_VERSION, "CIE Version"); |
3f76745e | 1674 | |
a6ab3aad JM |
1675 | if (eh_ptr) |
1676 | { | |
d84e64d4 JM |
1677 | /* The CIE contains a pointer to the exception region info for the |
1678 | frame. Make the augmentation string three bytes (including the | |
1679 | trailing null) so the pointer is 4-byte aligned. The Solaris ld | |
1680 | can't handle unaligned relocs. */ | |
e7f4d38a | 1681 | dw2_asm_output_nstring ("eh", -1, "CIE Augmentation"); |
2e4b9b8c RH |
1682 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, "__EXCEPTION_TABLE__", |
1683 | "pointer to exception region info"); | |
a6ab3aad JM |
1684 | } |
1685 | else | |
1686 | { | |
2e4b9b8c | 1687 | dw2_asm_output_data (1, 0, "CIE Augmentation (none)"); |
a6ab3aad | 1688 | } |
3f76745e | 1689 | |
2e4b9b8c | 1690 | dw2_asm_output_data_uleb128 (1, "CIE Code Alignment Factor"); |
3f76745e | 1691 | |
2e4b9b8c RH |
1692 | dw2_asm_output_data_sleb128 (DWARF_CIE_DATA_ALIGNMENT, |
1693 | "CIE Data Alignment Factor"); | |
3f76745e | 1694 | |
2e4b9b8c | 1695 | dw2_asm_output_data (1, DWARF_FRAME_RETURN_COLUMN, "CIE RA Column"); |
3f76745e JM |
1696 | |
1697 | for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next) | |
1698 | output_cfi (cfi, NULL); | |
1699 | ||
1700 | /* Pad the CIE out to an address sized boundary. */ | |
a1a4189d | 1701 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE)); |
a6ab3aad | 1702 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
2ed2af28 PDM |
1703 | #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL |
1704 | ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1); | |
7bb9fb0e JM |
1705 | if (flag_debug_asm) |
1706 | fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START); | |
1707 | fputc ('\n', asm_out_file); | |
2ed2af28 | 1708 | #endif |
3f76745e JM |
1709 | |
1710 | /* Loop through all of the FDE's. */ | |
1711 | for (i = 0; i < fde_table_in_use; ++i) | |
1712 | { | |
1713 | fde = &fde_table[i]; | |
3f76745e | 1714 | |
737faf14 JM |
1715 | /* Don't emit EH unwind info for leaf functions. */ |
1716 | if (for_eh && fde->nothrow) | |
1717 | continue; | |
1718 | ||
2e4b9b8c | 1719 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, FDE_LABEL, for_eh + i * 2); |
556273e0 KH |
1720 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i * 2); |
1721 | ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i * 2); | |
2ed2af28 | 1722 | #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL |
556273e0 | 1723 | ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i * 2); |
2e4b9b8c | 1724 | dw2_asm_output_offset (for_eh ? 4 : DWARF_OFFSET_SIZE, ld, "FDE Length"); |
2ed2af28 | 1725 | #else |
2e4b9b8c RH |
1726 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
1727 | "FDE Length"); | |
2ed2af28 | 1728 | #endif |
a6ab3aad JM |
1729 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
1730 | ||
eef906d6 JW |
1731 | /* ??? This always emits a 4 byte offset when for_eh is true, but it |
1732 | emits a target dependent sized offset when for_eh is not true. | |
1733 | This inconsistency may confuse gdb. The only case where we need a | |
1734 | non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI | |
1735 | compatibility if we emit a 4 byte offset. We need a 4 byte offset | |
1736 | though in order to be compatible with the dwarf_fde struct in frame.c. | |
1737 | If the for_eh case is changed, then the struct in frame.c has | |
1738 | to be adjusted appropriately. */ | |
3f76745e | 1739 | if (for_eh) |
2e4b9b8c | 1740 | dw2_asm_output_delta (4, l1, "__FRAME_BEGIN__", "FDE CIE offset"); |
3f76745e | 1741 | else |
2e4b9b8c RH |
1742 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, |
1743 | stripattributes (FRAME_SECTION), | |
1744 | "FDE CIE offset"); | |
3f76745e | 1745 | |
2e4b9b8c RH |
1746 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, fde->dw_fde_begin, |
1747 | "FDE initial location"); | |
3f76745e | 1748 | |
2e4b9b8c RH |
1749 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, fde->dw_fde_end, |
1750 | fde->dw_fde_begin, "FDE address range"); | |
3f76745e JM |
1751 | |
1752 | /* Loop through the Call Frame Instructions associated with | |
1753 | this FDE. */ | |
1754 | fde->dw_fde_current_label = fde->dw_fde_begin; | |
1755 | for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next) | |
1756 | output_cfi (cfi, fde); | |
1757 | ||
a6ab3aad | 1758 | /* Pad the FDE out to an address sized boundary. */ |
a1a4189d | 1759 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE)); |
a6ab3aad | 1760 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
2ed2af28 PDM |
1761 | #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL |
1762 | ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1); | |
7bb9fb0e JM |
1763 | if (flag_debug_asm) |
1764 | fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START); | |
1765 | fputc ('\n', asm_out_file); | |
2ed2af28 | 1766 | #endif |
3f76745e | 1767 | } |
2e4b9b8c | 1768 | |
3f76745e JM |
1769 | #ifndef EH_FRAME_SECTION |
1770 | if (for_eh) | |
2e4b9b8c | 1771 | dw2_asm_output_data (4, 0, "End of Table"); |
3f76745e | 1772 | #endif |
a6ab3aad JM |
1773 | #ifdef MIPS_DEBUGGING_INFO |
1774 | /* Work around Irix 6 assembler bug whereby labels at the end of a section | |
1775 | get a value of 0. Putting .align 0 after the label fixes it. */ | |
1776 | ASM_OUTPUT_ALIGN (asm_out_file, 0); | |
1777 | #endif | |
aa0c1401 JL |
1778 | |
1779 | /* Turn off app to make assembly quicker. */ | |
1780 | if (flag_debug_asm) | |
1781 | app_disable (); | |
a6ab3aad JM |
1782 | } |
1783 | ||
3f76745e JM |
1784 | /* Output a marker (i.e. a label) for the beginning of a function, before |
1785 | the prologue. */ | |
1786 | ||
1787 | void | |
1788 | dwarf2out_begin_prologue () | |
1789 | { | |
1790 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
1791 | register dw_fde_ref fde; | |
1792 | ||
4f988ea2 JM |
1793 | ++current_funcdef_number; |
1794 | ||
3f76745e JM |
1795 | function_section (current_function_decl); |
1796 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL, | |
1797 | current_funcdef_number); | |
1798 | ASM_OUTPUT_LABEL (asm_out_file, label); | |
00262c8a | 1799 | current_function_func_begin_label = get_identifier (label); |
3f76745e JM |
1800 | |
1801 | /* Expand the fde table if necessary. */ | |
1802 | if (fde_table_in_use == fde_table_allocated) | |
1803 | { | |
1804 | fde_table_allocated += FDE_TABLE_INCREMENT; | |
1805 | fde_table | |
1806 | = (dw_fde_ref) xrealloc (fde_table, | |
1807 | fde_table_allocated * sizeof (dw_fde_node)); | |
a3f97cbb | 1808 | } |
3f76745e JM |
1809 | |
1810 | /* Record the FDE associated with this function. */ | |
1811 | current_funcdef_fde = fde_table_in_use; | |
1812 | ||
1813 | /* Add the new FDE at the end of the fde_table. */ | |
1814 | fde = &fde_table[fde_table_in_use++]; | |
1815 | fde->dw_fde_begin = xstrdup (label); | |
1816 | fde->dw_fde_current_label = NULL; | |
1817 | fde->dw_fde_end = NULL; | |
1818 | fde->dw_fde_cfi = NULL; | |
fb13d4d0 | 1819 | fde->nothrow = current_function_nothrow; |
737faf14 | 1820 | |
b57d9225 | 1821 | args_size = old_args_size = 0; |
3f76745e JM |
1822 | } |
1823 | ||
1824 | /* Output a marker (i.e. a label) for the absolute end of the generated code | |
1825 | for a function definition. This gets called *after* the epilogue code has | |
1826 | been generated. */ | |
1827 | ||
1828 | void | |
1829 | dwarf2out_end_epilogue () | |
1830 | { | |
1831 | dw_fde_ref fde; | |
1832 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
1833 | ||
1834 | /* Output a label to mark the endpoint of the code generated for this | |
1835 | function. */ | |
1836 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number); | |
1837 | ASM_OUTPUT_LABEL (asm_out_file, label); | |
1838 | fde = &fde_table[fde_table_in_use - 1]; | |
1839 | fde->dw_fde_end = xstrdup (label); | |
3f76745e JM |
1840 | } |
1841 | ||
1842 | void | |
1843 | dwarf2out_frame_init () | |
1844 | { | |
1845 | /* Allocate the initial hunk of the fde_table. */ | |
3de90026 | 1846 | fde_table = (dw_fde_ref) xcalloc (FDE_TABLE_INCREMENT, sizeof (dw_fde_node)); |
3f76745e JM |
1847 | fde_table_allocated = FDE_TABLE_INCREMENT; |
1848 | fde_table_in_use = 0; | |
1849 | ||
1850 | /* Generate the CFA instructions common to all FDE's. Do it now for the | |
1851 | sake of lookup_cfa. */ | |
1852 | ||
a6ab3aad | 1853 | #ifdef DWARF2_UNWIND_INFO |
91193900 AS |
1854 | /* On entry, the Canonical Frame Address is at SP. */ |
1855 | dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET); | |
1856 | initial_return_save (INCOMING_RETURN_ADDR_RTX); | |
3f76745e JM |
1857 | #endif |
1858 | } | |
1859 | ||
1860 | void | |
1861 | dwarf2out_frame_finish () | |
1862 | { | |
3f76745e | 1863 | /* Output call frame information. */ |
a6ab3aad | 1864 | #ifdef MIPS_DEBUGGING_INFO |
3f76745e JM |
1865 | if (write_symbols == DWARF2_DEBUG) |
1866 | output_call_frame_info (0); | |
14a774a9 | 1867 | if (flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp)) |
3f76745e | 1868 | output_call_frame_info (1); |
a6ab3aad JM |
1869 | #else |
1870 | if (write_symbols == DWARF2_DEBUG | |
14a774a9 | 1871 | || flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp)) |
556273e0 | 1872 | output_call_frame_info (1); |
a6ab3aad | 1873 | #endif |
556273e0 | 1874 | } |
7d9d8943 AM |
1875 | \f |
1876 | /* And now, the subset of the debugging information support code necessary | |
1877 | for emitting location expressions. */ | |
3f76745e | 1878 | |
7d9d8943 AM |
1879 | typedef struct dw_val_struct *dw_val_ref; |
1880 | typedef struct die_struct *dw_die_ref; | |
1881 | typedef struct dw_loc_descr_struct *dw_loc_descr_ref; | |
3f76745e JM |
1882 | |
1883 | /* Each DIE may have a series of attribute/value pairs. Values | |
1884 | can take on several forms. The forms that are used in this | |
1885 | implementation are listed below. */ | |
1886 | ||
1887 | typedef enum | |
1888 | { | |
1889 | dw_val_class_addr, | |
1890 | dw_val_class_loc, | |
1891 | dw_val_class_const, | |
1892 | dw_val_class_unsigned_const, | |
1893 | dw_val_class_long_long, | |
1894 | dw_val_class_float, | |
1895 | dw_val_class_flag, | |
1896 | dw_val_class_die_ref, | |
1897 | dw_val_class_fde_ref, | |
1898 | dw_val_class_lbl_id, | |
8b790721 | 1899 | dw_val_class_lbl_offset, |
3f76745e | 1900 | dw_val_class_str |
a3f97cbb | 1901 | } |
3f76745e | 1902 | dw_val_class; |
a3f97cbb | 1903 | |
3f76745e | 1904 | /* Describe a double word constant value. */ |
21217bd0 | 1905 | /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */ |
3f76745e JM |
1906 | |
1907 | typedef struct dw_long_long_struct | |
a3f97cbb | 1908 | { |
3f76745e JM |
1909 | unsigned long hi; |
1910 | unsigned long low; | |
1911 | } | |
1912 | dw_long_long_const; | |
1913 | ||
1914 | /* Describe a floating point constant value. */ | |
1915 | ||
1916 | typedef struct dw_fp_struct | |
1917 | { | |
1918 | long *array; | |
1919 | unsigned length; | |
1920 | } | |
1921 | dw_float_const; | |
1922 | ||
956d6950 | 1923 | /* The dw_val_node describes an attribute's value, as it is |
3f76745e JM |
1924 | represented internally. */ |
1925 | ||
1926 | typedef struct dw_val_struct | |
1927 | { | |
1928 | dw_val_class val_class; | |
1929 | union | |
a3f97cbb | 1930 | { |
1865dbb5 | 1931 | rtx val_addr; |
3f76745e JM |
1932 | dw_loc_descr_ref val_loc; |
1933 | long int val_int; | |
1934 | long unsigned val_unsigned; | |
1935 | dw_long_long_const val_long_long; | |
1936 | dw_float_const val_float; | |
881c6935 JM |
1937 | struct { |
1938 | dw_die_ref die; | |
1939 | int external; | |
1940 | } val_die_ref; | |
3f76745e JM |
1941 | unsigned val_fde_index; |
1942 | char *val_str; | |
1943 | char *val_lbl_id; | |
3f76745e | 1944 | unsigned char val_flag; |
a3f97cbb | 1945 | } |
3f76745e JM |
1946 | v; |
1947 | } | |
1948 | dw_val_node; | |
1949 | ||
1950 | /* Locations in memory are described using a sequence of stack machine | |
1951 | operations. */ | |
1952 | ||
1953 | typedef struct dw_loc_descr_struct | |
1954 | { | |
1955 | dw_loc_descr_ref dw_loc_next; | |
1956 | enum dwarf_location_atom dw_loc_opc; | |
1957 | dw_val_node dw_loc_oprnd1; | |
1958 | dw_val_node dw_loc_oprnd2; | |
d8041cc8 | 1959 | int dw_loc_addr; |
3f76745e JM |
1960 | } |
1961 | dw_loc_descr_node; | |
1962 | ||
7d9d8943 AM |
1963 | static const char *dwarf_stack_op_name PARAMS ((unsigned)); |
1964 | static dw_loc_descr_ref new_loc_descr PARAMS ((enum dwarf_location_atom, | |
1965 | unsigned long, | |
1966 | unsigned long)); | |
1967 | static void add_loc_descr PARAMS ((dw_loc_descr_ref *, | |
1968 | dw_loc_descr_ref)); | |
1969 | static unsigned long size_of_loc_descr PARAMS ((dw_loc_descr_ref)); | |
1970 | static unsigned long size_of_locs PARAMS ((dw_loc_descr_ref)); | |
1971 | static void output_loc_operands PARAMS ((dw_loc_descr_ref)); | |
1972 | static void output_loc_sequence PARAMS ((dw_loc_descr_ref)); | |
3f76745e | 1973 | |
7d9d8943 | 1974 | /* Convert a DWARF stack opcode into its string name. */ |
3f76745e | 1975 | |
7d9d8943 AM |
1976 | static const char * |
1977 | dwarf_stack_op_name (op) | |
1978 | register unsigned op; | |
ef76d03b | 1979 | { |
7d9d8943 AM |
1980 | switch (op) |
1981 | { | |
1982 | case DW_OP_addr: | |
1983 | return "DW_OP_addr"; | |
1984 | case DW_OP_deref: | |
1985 | return "DW_OP_deref"; | |
1986 | case DW_OP_const1u: | |
1987 | return "DW_OP_const1u"; | |
1988 | case DW_OP_const1s: | |
1989 | return "DW_OP_const1s"; | |
1990 | case DW_OP_const2u: | |
1991 | return "DW_OP_const2u"; | |
1992 | case DW_OP_const2s: | |
1993 | return "DW_OP_const2s"; | |
1994 | case DW_OP_const4u: | |
1995 | return "DW_OP_const4u"; | |
1996 | case DW_OP_const4s: | |
1997 | return "DW_OP_const4s"; | |
1998 | case DW_OP_const8u: | |
1999 | return "DW_OP_const8u"; | |
2000 | case DW_OP_const8s: | |
2001 | return "DW_OP_const8s"; | |
2002 | case DW_OP_constu: | |
2003 | return "DW_OP_constu"; | |
2004 | case DW_OP_consts: | |
2005 | return "DW_OP_consts"; | |
2006 | case DW_OP_dup: | |
2007 | return "DW_OP_dup"; | |
2008 | case DW_OP_drop: | |
2009 | return "DW_OP_drop"; | |
2010 | case DW_OP_over: | |
2011 | return "DW_OP_over"; | |
2012 | case DW_OP_pick: | |
2013 | return "DW_OP_pick"; | |
2014 | case DW_OP_swap: | |
2015 | return "DW_OP_swap"; | |
2016 | case DW_OP_rot: | |
2017 | return "DW_OP_rot"; | |
2018 | case DW_OP_xderef: | |
2019 | return "DW_OP_xderef"; | |
2020 | case DW_OP_abs: | |
2021 | return "DW_OP_abs"; | |
2022 | case DW_OP_and: | |
2023 | return "DW_OP_and"; | |
2024 | case DW_OP_div: | |
2025 | return "DW_OP_div"; | |
2026 | case DW_OP_minus: | |
2027 | return "DW_OP_minus"; | |
2028 | case DW_OP_mod: | |
2029 | return "DW_OP_mod"; | |
2030 | case DW_OP_mul: | |
2031 | return "DW_OP_mul"; | |
2032 | case DW_OP_neg: | |
2033 | return "DW_OP_neg"; | |
2034 | case DW_OP_not: | |
2035 | return "DW_OP_not"; | |
2036 | case DW_OP_or: | |
2037 | return "DW_OP_or"; | |
2038 | case DW_OP_plus: | |
2039 | return "DW_OP_plus"; | |
2040 | case DW_OP_plus_uconst: | |
2041 | return "DW_OP_plus_uconst"; | |
2042 | case DW_OP_shl: | |
2043 | return "DW_OP_shl"; | |
2044 | case DW_OP_shr: | |
2045 | return "DW_OP_shr"; | |
2046 | case DW_OP_shra: | |
2047 | return "DW_OP_shra"; | |
2048 | case DW_OP_xor: | |
2049 | return "DW_OP_xor"; | |
2050 | case DW_OP_bra: | |
2051 | return "DW_OP_bra"; | |
2052 | case DW_OP_eq: | |
2053 | return "DW_OP_eq"; | |
2054 | case DW_OP_ge: | |
2055 | return "DW_OP_ge"; | |
2056 | case DW_OP_gt: | |
2057 | return "DW_OP_gt"; | |
2058 | case DW_OP_le: | |
2059 | return "DW_OP_le"; | |
2060 | case DW_OP_lt: | |
2061 | return "DW_OP_lt"; | |
2062 | case DW_OP_ne: | |
2063 | return "DW_OP_ne"; | |
2064 | case DW_OP_skip: | |
2065 | return "DW_OP_skip"; | |
2066 | case DW_OP_lit0: | |
2067 | return "DW_OP_lit0"; | |
2068 | case DW_OP_lit1: | |
2069 | return "DW_OP_lit1"; | |
2070 | case DW_OP_lit2: | |
2071 | return "DW_OP_lit2"; | |
2072 | case DW_OP_lit3: | |
2073 | return "DW_OP_lit3"; | |
2074 | case DW_OP_lit4: | |
2075 | return "DW_OP_lit4"; | |
2076 | case DW_OP_lit5: | |
2077 | return "DW_OP_lit5"; | |
2078 | case DW_OP_lit6: | |
2079 | return "DW_OP_lit6"; | |
2080 | case DW_OP_lit7: | |
2081 | return "DW_OP_lit7"; | |
2082 | case DW_OP_lit8: | |
2083 | return "DW_OP_lit8"; | |
2084 | case DW_OP_lit9: | |
2085 | return "DW_OP_lit9"; | |
2086 | case DW_OP_lit10: | |
2087 | return "DW_OP_lit10"; | |
2088 | case DW_OP_lit11: | |
2089 | return "DW_OP_lit11"; | |
2090 | case DW_OP_lit12: | |
2091 | return "DW_OP_lit12"; | |
2092 | case DW_OP_lit13: | |
2093 | return "DW_OP_lit13"; | |
2094 | case DW_OP_lit14: | |
2095 | return "DW_OP_lit14"; | |
2096 | case DW_OP_lit15: | |
2097 | return "DW_OP_lit15"; | |
2098 | case DW_OP_lit16: | |
2099 | return "DW_OP_lit16"; | |
2100 | case DW_OP_lit17: | |
2101 | return "DW_OP_lit17"; | |
2102 | case DW_OP_lit18: | |
2103 | return "DW_OP_lit18"; | |
2104 | case DW_OP_lit19: | |
2105 | return "DW_OP_lit19"; | |
2106 | case DW_OP_lit20: | |
2107 | return "DW_OP_lit20"; | |
2108 | case DW_OP_lit21: | |
2109 | return "DW_OP_lit21"; | |
2110 | case DW_OP_lit22: | |
2111 | return "DW_OP_lit22"; | |
2112 | case DW_OP_lit23: | |
2113 | return "DW_OP_lit23"; | |
2114 | case DW_OP_lit24: | |
2115 | return "DW_OP_lit24"; | |
2116 | case DW_OP_lit25: | |
2117 | return "DW_OP_lit25"; | |
2118 | case DW_OP_lit26: | |
2119 | return "DW_OP_lit26"; | |
2120 | case DW_OP_lit27: | |
2121 | return "DW_OP_lit27"; | |
2122 | case DW_OP_lit28: | |
2123 | return "DW_OP_lit28"; | |
2124 | case DW_OP_lit29: | |
2125 | return "DW_OP_lit29"; | |
2126 | case DW_OP_lit30: | |
2127 | return "DW_OP_lit30"; | |
2128 | case DW_OP_lit31: | |
2129 | return "DW_OP_lit31"; | |
2130 | case DW_OP_reg0: | |
2131 | return "DW_OP_reg0"; | |
2132 | case DW_OP_reg1: | |
2133 | return "DW_OP_reg1"; | |
2134 | case DW_OP_reg2: | |
2135 | return "DW_OP_reg2"; | |
2136 | case DW_OP_reg3: | |
2137 | return "DW_OP_reg3"; | |
2138 | case DW_OP_reg4: | |
2139 | return "DW_OP_reg4"; | |
2140 | case DW_OP_reg5: | |
2141 | return "DW_OP_reg5"; | |
2142 | case DW_OP_reg6: | |
2143 | return "DW_OP_reg6"; | |
2144 | case DW_OP_reg7: | |
2145 | return "DW_OP_reg7"; | |
2146 | case DW_OP_reg8: | |
2147 | return "DW_OP_reg8"; | |
2148 | case DW_OP_reg9: | |
2149 | return "DW_OP_reg9"; | |
2150 | case DW_OP_reg10: | |
2151 | return "DW_OP_reg10"; | |
2152 | case DW_OP_reg11: | |
2153 | return "DW_OP_reg11"; | |
2154 | case DW_OP_reg12: | |
2155 | return "DW_OP_reg12"; | |
2156 | case DW_OP_reg13: | |
2157 | return "DW_OP_reg13"; | |
2158 | case DW_OP_reg14: | |
2159 | return "DW_OP_reg14"; | |
2160 | case DW_OP_reg15: | |
2161 | return "DW_OP_reg15"; | |
2162 | case DW_OP_reg16: | |
2163 | return "DW_OP_reg16"; | |
2164 | case DW_OP_reg17: | |
2165 | return "DW_OP_reg17"; | |
2166 | case DW_OP_reg18: | |
2167 | return "DW_OP_reg18"; | |
2168 | case DW_OP_reg19: | |
2169 | return "DW_OP_reg19"; | |
2170 | case DW_OP_reg20: | |
2171 | return "DW_OP_reg20"; | |
2172 | case DW_OP_reg21: | |
2173 | return "DW_OP_reg21"; | |
2174 | case DW_OP_reg22: | |
2175 | return "DW_OP_reg22"; | |
2176 | case DW_OP_reg23: | |
2177 | return "DW_OP_reg23"; | |
2178 | case DW_OP_reg24: | |
2179 | return "DW_OP_reg24"; | |
2180 | case DW_OP_reg25: | |
2181 | return "DW_OP_reg25"; | |
2182 | case DW_OP_reg26: | |
2183 | return "DW_OP_reg26"; | |
2184 | case DW_OP_reg27: | |
2185 | return "DW_OP_reg27"; | |
2186 | case DW_OP_reg28: | |
2187 | return "DW_OP_reg28"; | |
2188 | case DW_OP_reg29: | |
2189 | return "DW_OP_reg29"; | |
2190 | case DW_OP_reg30: | |
2191 | return "DW_OP_reg30"; | |
2192 | case DW_OP_reg31: | |
2193 | return "DW_OP_reg31"; | |
2194 | case DW_OP_breg0: | |
2195 | return "DW_OP_breg0"; | |
2196 | case DW_OP_breg1: | |
2197 | return "DW_OP_breg1"; | |
2198 | case DW_OP_breg2: | |
2199 | return "DW_OP_breg2"; | |
2200 | case DW_OP_breg3: | |
2201 | return "DW_OP_breg3"; | |
2202 | case DW_OP_breg4: | |
2203 | return "DW_OP_breg4"; | |
2204 | case DW_OP_breg5: | |
2205 | return "DW_OP_breg5"; | |
2206 | case DW_OP_breg6: | |
2207 | return "DW_OP_breg6"; | |
2208 | case DW_OP_breg7: | |
2209 | return "DW_OP_breg7"; | |
2210 | case DW_OP_breg8: | |
2211 | return "DW_OP_breg8"; | |
2212 | case DW_OP_breg9: | |
2213 | return "DW_OP_breg9"; | |
2214 | case DW_OP_breg10: | |
2215 | return "DW_OP_breg10"; | |
2216 | case DW_OP_breg11: | |
2217 | return "DW_OP_breg11"; | |
2218 | case DW_OP_breg12: | |
2219 | return "DW_OP_breg12"; | |
2220 | case DW_OP_breg13: | |
2221 | return "DW_OP_breg13"; | |
2222 | case DW_OP_breg14: | |
2223 | return "DW_OP_breg14"; | |
2224 | case DW_OP_breg15: | |
2225 | return "DW_OP_breg15"; | |
2226 | case DW_OP_breg16: | |
2227 | return "DW_OP_breg16"; | |
2228 | case DW_OP_breg17: | |
2229 | return "DW_OP_breg17"; | |
2230 | case DW_OP_breg18: | |
2231 | return "DW_OP_breg18"; | |
2232 | case DW_OP_breg19: | |
2233 | return "DW_OP_breg19"; | |
2234 | case DW_OP_breg20: | |
2235 | return "DW_OP_breg20"; | |
2236 | case DW_OP_breg21: | |
2237 | return "DW_OP_breg21"; | |
2238 | case DW_OP_breg22: | |
2239 | return "DW_OP_breg22"; | |
2240 | case DW_OP_breg23: | |
2241 | return "DW_OP_breg23"; | |
2242 | case DW_OP_breg24: | |
2243 | return "DW_OP_breg24"; | |
2244 | case DW_OP_breg25: | |
2245 | return "DW_OP_breg25"; | |
2246 | case DW_OP_breg26: | |
2247 | return "DW_OP_breg26"; | |
2248 | case DW_OP_breg27: | |
2249 | return "DW_OP_breg27"; | |
2250 | case DW_OP_breg28: | |
2251 | return "DW_OP_breg28"; | |
2252 | case DW_OP_breg29: | |
2253 | return "DW_OP_breg29"; | |
2254 | case DW_OP_breg30: | |
2255 | return "DW_OP_breg30"; | |
2256 | case DW_OP_breg31: | |
2257 | return "DW_OP_breg31"; | |
2258 | case DW_OP_regx: | |
2259 | return "DW_OP_regx"; | |
2260 | case DW_OP_fbreg: | |
2261 | return "DW_OP_fbreg"; | |
2262 | case DW_OP_bregx: | |
2263 | return "DW_OP_bregx"; | |
2264 | case DW_OP_piece: | |
2265 | return "DW_OP_piece"; | |
2266 | case DW_OP_deref_size: | |
2267 | return "DW_OP_deref_size"; | |
2268 | case DW_OP_xderef_size: | |
2269 | return "DW_OP_xderef_size"; | |
2270 | case DW_OP_nop: | |
2271 | return "DW_OP_nop"; | |
3f76745e | 2272 | default: |
7d9d8943 | 2273 | return "OP_<unknown>"; |
3f76745e | 2274 | } |
bdb669cb | 2275 | } |
a3f97cbb | 2276 | |
7d9d8943 AM |
2277 | /* Return a pointer to a newly allocated location description. Location |
2278 | descriptions are simple expression terms that can be strung | |
2279 | together to form more complicated location (address) descriptions. */ | |
2280 | ||
2281 | static inline dw_loc_descr_ref | |
2282 | new_loc_descr (op, oprnd1, oprnd2) | |
2283 | register enum dwarf_location_atom op; | |
2284 | register unsigned long oprnd1; | |
2285 | register unsigned long oprnd2; | |
4b674448 | 2286 | { |
5de0e8d4 JM |
2287 | /* Use xcalloc here so we clear out all of the long_long constant in |
2288 | the union. */ | |
7d9d8943 | 2289 | register dw_loc_descr_ref descr |
5de0e8d4 | 2290 | = (dw_loc_descr_ref) xcalloc (1, sizeof (dw_loc_descr_node)); |
71dfc51f | 2291 | |
7d9d8943 AM |
2292 | descr->dw_loc_opc = op; |
2293 | descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const; | |
2294 | descr->dw_loc_oprnd1.v.val_unsigned = oprnd1; | |
2295 | descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const; | |
2296 | descr->dw_loc_oprnd2.v.val_unsigned = oprnd2; | |
71dfc51f | 2297 | |
7d9d8943 AM |
2298 | return descr; |
2299 | } | |
2300 | ||
2301 | /* Add a location description term to a location description expression. */ | |
2302 | ||
2303 | static inline void | |
2304 | add_loc_descr (list_head, descr) | |
2305 | register dw_loc_descr_ref *list_head; | |
2306 | register dw_loc_descr_ref descr; | |
2307 | { | |
2308 | register dw_loc_descr_ref *d; | |
2309 | ||
2310 | /* Find the end of the chain. */ | |
2311 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) | |
2312 | ; | |
2313 | ||
2314 | *d = descr; | |
2315 | } | |
2316 | ||
2317 | /* Return the size of a location descriptor. */ | |
2318 | ||
2319 | static unsigned long | |
2320 | size_of_loc_descr (loc) | |
2321 | register dw_loc_descr_ref loc; | |
2322 | { | |
2323 | register unsigned long size = 1; | |
2324 | ||
2325 | switch (loc->dw_loc_opc) | |
2326 | { | |
2327 | case DW_OP_addr: | |
2328 | size += DWARF2_ADDR_SIZE; | |
2329 | break; | |
2330 | case DW_OP_const1u: | |
2331 | case DW_OP_const1s: | |
2332 | size += 1; | |
2333 | break; | |
2334 | case DW_OP_const2u: | |
2335 | case DW_OP_const2s: | |
2336 | size += 2; | |
2337 | break; | |
2338 | case DW_OP_const4u: | |
2339 | case DW_OP_const4s: | |
2340 | size += 4; | |
2341 | break; | |
2342 | case DW_OP_const8u: | |
2343 | case DW_OP_const8s: | |
2344 | size += 8; | |
2345 | break; | |
2346 | case DW_OP_constu: | |
2347 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2348 | break; | |
2349 | case DW_OP_consts: | |
2350 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
2351 | break; | |
2352 | case DW_OP_pick: | |
2353 | size += 1; | |
2354 | break; | |
2355 | case DW_OP_plus_uconst: | |
2356 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2357 | break; | |
2358 | case DW_OP_skip: | |
2359 | case DW_OP_bra: | |
2360 | size += 2; | |
2361 | break; | |
2362 | case DW_OP_breg0: | |
2363 | case DW_OP_breg1: | |
2364 | case DW_OP_breg2: | |
2365 | case DW_OP_breg3: | |
2366 | case DW_OP_breg4: | |
2367 | case DW_OP_breg5: | |
2368 | case DW_OP_breg6: | |
2369 | case DW_OP_breg7: | |
2370 | case DW_OP_breg8: | |
2371 | case DW_OP_breg9: | |
2372 | case DW_OP_breg10: | |
2373 | case DW_OP_breg11: | |
2374 | case DW_OP_breg12: | |
2375 | case DW_OP_breg13: | |
2376 | case DW_OP_breg14: | |
2377 | case DW_OP_breg15: | |
2378 | case DW_OP_breg16: | |
2379 | case DW_OP_breg17: | |
2380 | case DW_OP_breg18: | |
2381 | case DW_OP_breg19: | |
2382 | case DW_OP_breg20: | |
2383 | case DW_OP_breg21: | |
2384 | case DW_OP_breg22: | |
2385 | case DW_OP_breg23: | |
2386 | case DW_OP_breg24: | |
2387 | case DW_OP_breg25: | |
2388 | case DW_OP_breg26: | |
2389 | case DW_OP_breg27: | |
2390 | case DW_OP_breg28: | |
2391 | case DW_OP_breg29: | |
2392 | case DW_OP_breg30: | |
2393 | case DW_OP_breg31: | |
2394 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
2395 | break; | |
2396 | case DW_OP_regx: | |
2397 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2398 | break; | |
2399 | case DW_OP_fbreg: | |
2400 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
2401 | break; | |
2402 | case DW_OP_bregx: | |
2403 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2404 | size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int); | |
2405 | break; | |
2406 | case DW_OP_piece: | |
2407 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
2408 | break; | |
2409 | case DW_OP_deref_size: | |
2410 | case DW_OP_xderef_size: | |
2411 | size += 1; | |
2412 | break; | |
3f76745e | 2413 | default: |
7d9d8943 | 2414 | break; |
4b674448 | 2415 | } |
7d9d8943 AM |
2416 | |
2417 | return size; | |
4b674448 JM |
2418 | } |
2419 | ||
7d9d8943 | 2420 | /* Return the size of a series of location descriptors. */ |
71dfc51f | 2421 | |
7d9d8943 AM |
2422 | static unsigned long |
2423 | size_of_locs (loc) | |
2424 | register dw_loc_descr_ref loc; | |
4b674448 | 2425 | { |
7d9d8943 AM |
2426 | register unsigned long size = 0; |
2427 | ||
2428 | for (; loc != NULL; loc = loc->dw_loc_next) | |
d8041cc8 RH |
2429 | { |
2430 | loc->dw_loc_addr = size; | |
2431 | size += size_of_loc_descr (loc); | |
2432 | } | |
7d9d8943 AM |
2433 | |
2434 | return size; | |
4b674448 JM |
2435 | } |
2436 | ||
7d9d8943 | 2437 | /* Output location description stack opcode's operands (if any). */ |
71dfc51f | 2438 | |
7d9d8943 AM |
2439 | static void |
2440 | output_loc_operands (loc) | |
2441 | register dw_loc_descr_ref loc; | |
a3f97cbb | 2442 | { |
7d9d8943 AM |
2443 | register dw_val_ref val1 = &loc->dw_loc_oprnd1; |
2444 | register dw_val_ref val2 = &loc->dw_loc_oprnd2; | |
2445 | ||
2446 | switch (loc->dw_loc_opc) | |
a3f97cbb | 2447 | { |
0517872a | 2448 | #ifdef DWARF2_DEBUGGING_INFO |
3f76745e | 2449 | case DW_OP_addr: |
2e4b9b8c | 2450 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, val1->v.val_addr, NULL); |
7d9d8943 | 2451 | break; |
3f76745e | 2452 | case DW_OP_const2u: |
3f76745e | 2453 | case DW_OP_const2s: |
2e4b9b8c | 2454 | dw2_asm_output_data (2, val1->v.val_int, NULL); |
7d9d8943 | 2455 | break; |
3f76745e | 2456 | case DW_OP_const4u: |
3f76745e | 2457 | case DW_OP_const4s: |
2e4b9b8c | 2458 | dw2_asm_output_data (4, val1->v.val_int, NULL); |
7d9d8943 | 2459 | break; |
3f76745e | 2460 | case DW_OP_const8u: |
3f76745e | 2461 | case DW_OP_const8s: |
2e4b9b8c RH |
2462 | if (HOST_BITS_PER_LONG < 64) |
2463 | abort (); | |
2464 | dw2_asm_output_data (8, val1->v.val_int, NULL); | |
7d9d8943 | 2465 | break; |
0517872a JM |
2466 | case DW_OP_skip: |
2467 | case DW_OP_bra: | |
d8041cc8 RH |
2468 | { |
2469 | int offset; | |
2470 | ||
2471 | if (val1->val_class == dw_val_class_loc) | |
2472 | offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3); | |
2473 | else | |
2474 | abort (); | |
2475 | ||
2e4b9b8c | 2476 | dw2_asm_output_data (2, offset, NULL); |
d8041cc8 | 2477 | } |
0517872a | 2478 | break; |
3139472f JM |
2479 | #else |
2480 | case DW_OP_addr: | |
2481 | case DW_OP_const2u: | |
2482 | case DW_OP_const2s: | |
2483 | case DW_OP_const4u: | |
2484 | case DW_OP_const4s: | |
2485 | case DW_OP_const8u: | |
2486 | case DW_OP_const8s: | |
2487 | case DW_OP_skip: | |
2488 | case DW_OP_bra: | |
2489 | /* We currently don't make any attempt to make sure these are | |
2490 | aligned properly like we do for the main unwind info, so | |
2491 | don't support emitting things larger than a byte if we're | |
2492 | only doing unwinding. */ | |
2493 | abort (); | |
0517872a JM |
2494 | #endif |
2495 | case DW_OP_const1u: | |
2496 | case DW_OP_const1s: | |
2e4b9b8c | 2497 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
0517872a | 2498 | break; |
3f76745e | 2499 | case DW_OP_constu: |
2e4b9b8c | 2500 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 2501 | break; |
3f76745e | 2502 | case DW_OP_consts: |
2e4b9b8c | 2503 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 AM |
2504 | break; |
2505 | case DW_OP_pick: | |
2e4b9b8c | 2506 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
7d9d8943 AM |
2507 | break; |
2508 | case DW_OP_plus_uconst: | |
2e4b9b8c | 2509 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 2510 | break; |
3f76745e | 2511 | case DW_OP_breg0: |
3f76745e | 2512 | case DW_OP_breg1: |
3f76745e | 2513 | case DW_OP_breg2: |
3f76745e | 2514 | case DW_OP_breg3: |
3f76745e | 2515 | case DW_OP_breg4: |
3f76745e | 2516 | case DW_OP_breg5: |
3f76745e | 2517 | case DW_OP_breg6: |
3f76745e | 2518 | case DW_OP_breg7: |
3f76745e | 2519 | case DW_OP_breg8: |
3f76745e | 2520 | case DW_OP_breg9: |
3f76745e | 2521 | case DW_OP_breg10: |
3f76745e | 2522 | case DW_OP_breg11: |
3f76745e | 2523 | case DW_OP_breg12: |
3f76745e | 2524 | case DW_OP_breg13: |
3f76745e | 2525 | case DW_OP_breg14: |
3f76745e | 2526 | case DW_OP_breg15: |
3f76745e | 2527 | case DW_OP_breg16: |
3f76745e | 2528 | case DW_OP_breg17: |
3f76745e | 2529 | case DW_OP_breg18: |
3f76745e | 2530 | case DW_OP_breg19: |
3f76745e | 2531 | case DW_OP_breg20: |
3f76745e | 2532 | case DW_OP_breg21: |
3f76745e | 2533 | case DW_OP_breg22: |
3f76745e | 2534 | case DW_OP_breg23: |
3f76745e | 2535 | case DW_OP_breg24: |
3f76745e | 2536 | case DW_OP_breg25: |
3f76745e | 2537 | case DW_OP_breg26: |
3f76745e | 2538 | case DW_OP_breg27: |
3f76745e | 2539 | case DW_OP_breg28: |
3f76745e | 2540 | case DW_OP_breg29: |
3f76745e | 2541 | case DW_OP_breg30: |
3f76745e | 2542 | case DW_OP_breg31: |
2e4b9b8c | 2543 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 | 2544 | break; |
3f76745e | 2545 | case DW_OP_regx: |
2e4b9b8c | 2546 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 2547 | break; |
3f76745e | 2548 | case DW_OP_fbreg: |
2e4b9b8c | 2549 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 | 2550 | break; |
3f76745e | 2551 | case DW_OP_bregx: |
2e4b9b8c RH |
2552 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
2553 | dw2_asm_output_data_sleb128 (val2->v.val_int, NULL); | |
7d9d8943 | 2554 | break; |
3f76745e | 2555 | case DW_OP_piece: |
2e4b9b8c | 2556 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 2557 | break; |
3f76745e | 2558 | case DW_OP_deref_size: |
3f76745e | 2559 | case DW_OP_xderef_size: |
2e4b9b8c | 2560 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
7d9d8943 AM |
2561 | break; |
2562 | default: | |
3139472f JM |
2563 | /* Other codes have no operands. */ |
2564 | break; | |
7d9d8943 AM |
2565 | } |
2566 | } | |
2567 | ||
2568 | /* Output a sequence of location operations. */ | |
2569 | ||
2570 | static void | |
2571 | output_loc_sequence (loc) | |
2572 | dw_loc_descr_ref loc; | |
2573 | { | |
2574 | for (; loc != NULL; loc = loc->dw_loc_next) | |
2575 | { | |
2576 | /* Output the opcode. */ | |
2e4b9b8c RH |
2577 | dw2_asm_output_data (1, loc->dw_loc_opc, |
2578 | "%s", dwarf_stack_op_name (loc->dw_loc_opc)); | |
7d9d8943 AM |
2579 | |
2580 | /* Output the operand(s) (if any). */ | |
2581 | output_loc_operands (loc); | |
2582 | } | |
2583 | } | |
2584 | ||
2585 | /* This routine will generate the correct assembly data for a location | |
2586 | description based on a cfi entry with a complex address. */ | |
2587 | ||
2588 | static void | |
2589 | output_cfa_loc (cfi) | |
2590 | dw_cfi_ref cfi; | |
2591 | { | |
2592 | dw_loc_descr_ref loc; | |
2593 | unsigned long size; | |
2594 | ||
2595 | /* Output the size of the block. */ | |
2596 | loc = cfi->dw_cfi_oprnd1.dw_cfi_loc; | |
2597 | size = size_of_locs (loc); | |
2e4b9b8c | 2598 | dw2_asm_output_data_uleb128 (size, NULL); |
7d9d8943 AM |
2599 | |
2600 | /* Now output the operations themselves. */ | |
2601 | output_loc_sequence (loc); | |
2602 | } | |
2603 | ||
556273e0 KH |
2604 | /* This function builds a dwarf location descriptor seqeunce from |
2605 | a dw_cfa_location. */ | |
7d9d8943 AM |
2606 | |
2607 | static struct dw_loc_descr_struct * | |
2608 | build_cfa_loc (cfa) | |
2609 | dw_cfa_location *cfa; | |
2610 | { | |
2611 | struct dw_loc_descr_struct *head, *tmp; | |
2612 | ||
2613 | if (cfa->indirect == 0) | |
2614 | abort (); | |
2615 | ||
2616 | if (cfa->base_offset) | |
f299afab HPN |
2617 | { |
2618 | if (cfa->reg <= 31) | |
2619 | head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0); | |
2620 | else | |
2621 | head = new_loc_descr (DW_OP_bregx, cfa->reg, cfa->base_offset); | |
2622 | } | |
2623 | else if (cfa->reg <= 31) | |
7d9d8943 | 2624 | head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0); |
f299afab HPN |
2625 | else |
2626 | head = new_loc_descr (DW_OP_regx, cfa->reg, 0); | |
7d9d8943 AM |
2627 | head->dw_loc_oprnd1.val_class = dw_val_class_const; |
2628 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
2629 | add_loc_descr (&head, tmp); | |
2630 | if (cfa->offset != 0) | |
2631 | { | |
2632 | tmp = new_loc_descr (DW_OP_plus_uconst, cfa->offset, 0); | |
2633 | add_loc_descr (&head, tmp); | |
2634 | } | |
2635 | return head; | |
2636 | } | |
2637 | ||
556273e0 | 2638 | /* This function fills in aa dw_cfa_location structure from a |
7d9d8943 AM |
2639 | dwarf location descriptor sequence. */ |
2640 | ||
2641 | static void | |
2642 | get_cfa_from_loc_descr (cfa, loc) | |
2643 | dw_cfa_location *cfa; | |
556273e0 | 2644 | struct dw_loc_descr_struct *loc; |
7d9d8943 | 2645 | { |
556273e0 | 2646 | struct dw_loc_descr_struct *ptr; |
7d9d8943 AM |
2647 | cfa->offset = 0; |
2648 | cfa->base_offset = 0; | |
2649 | cfa->indirect = 0; | |
2650 | cfa->reg = -1; | |
2651 | ||
2652 | for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next) | |
2653 | { | |
2654 | enum dwarf_location_atom op = ptr->dw_loc_opc; | |
2655 | switch (op) | |
556273e0 | 2656 | { |
7d9d8943 AM |
2657 | case DW_OP_reg0: |
2658 | case DW_OP_reg1: | |
2659 | case DW_OP_reg2: | |
2660 | case DW_OP_reg3: | |
2661 | case DW_OP_reg4: | |
2662 | case DW_OP_reg5: | |
2663 | case DW_OP_reg6: | |
2664 | case DW_OP_reg7: | |
2665 | case DW_OP_reg8: | |
2666 | case DW_OP_reg9: | |
2667 | case DW_OP_reg10: | |
2668 | case DW_OP_reg11: | |
2669 | case DW_OP_reg12: | |
2670 | case DW_OP_reg13: | |
2671 | case DW_OP_reg14: | |
2672 | case DW_OP_reg15: | |
2673 | case DW_OP_reg16: | |
2674 | case DW_OP_reg17: | |
2675 | case DW_OP_reg18: | |
2676 | case DW_OP_reg19: | |
2677 | case DW_OP_reg20: | |
2678 | case DW_OP_reg21: | |
2679 | case DW_OP_reg22: | |
2680 | case DW_OP_reg23: | |
2681 | case DW_OP_reg24: | |
2682 | case DW_OP_reg25: | |
2683 | case DW_OP_reg26: | |
2684 | case DW_OP_reg27: | |
2685 | case DW_OP_reg28: | |
2686 | case DW_OP_reg29: | |
2687 | case DW_OP_reg30: | |
2688 | case DW_OP_reg31: | |
2689 | cfa->reg = op - DW_OP_reg0; | |
2690 | break; | |
2691 | case DW_OP_regx: | |
2692 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
2693 | break; | |
2694 | case DW_OP_breg0: | |
2695 | case DW_OP_breg1: | |
2696 | case DW_OP_breg2: | |
2697 | case DW_OP_breg3: | |
2698 | case DW_OP_breg4: | |
2699 | case DW_OP_breg5: | |
2700 | case DW_OP_breg6: | |
2701 | case DW_OP_breg7: | |
2702 | case DW_OP_breg8: | |
2703 | case DW_OP_breg9: | |
2704 | case DW_OP_breg10: | |
2705 | case DW_OP_breg11: | |
2706 | case DW_OP_breg12: | |
2707 | case DW_OP_breg13: | |
2708 | case DW_OP_breg14: | |
2709 | case DW_OP_breg15: | |
2710 | case DW_OP_breg16: | |
2711 | case DW_OP_breg17: | |
2712 | case DW_OP_breg18: | |
2713 | case DW_OP_breg19: | |
2714 | case DW_OP_breg20: | |
2715 | case DW_OP_breg21: | |
2716 | case DW_OP_breg22: | |
2717 | case DW_OP_breg23: | |
2718 | case DW_OP_breg24: | |
2719 | case DW_OP_breg25: | |
2720 | case DW_OP_breg26: | |
2721 | case DW_OP_breg27: | |
2722 | case DW_OP_breg28: | |
2723 | case DW_OP_breg29: | |
2724 | case DW_OP_breg30: | |
2725 | case DW_OP_breg31: | |
2726 | cfa->reg = op - DW_OP_breg0; | |
2727 | cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int; | |
2728 | break; | |
2729 | case DW_OP_bregx: | |
2730 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
2731 | cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int; | |
2732 | break; | |
2733 | case DW_OP_deref: | |
2734 | cfa->indirect = 1; | |
2735 | break; | |
2736 | case DW_OP_plus_uconst: | |
556273e0 | 2737 | cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned; |
7d9d8943 AM |
2738 | break; |
2739 | default: | |
400500c4 RK |
2740 | internal_error ("DW_LOC_OP %s not implememnted\n", |
2741 | dwarf_stack_op_name (ptr->dw_loc_opc)); | |
7d9d8943 AM |
2742 | } |
2743 | } | |
2744 | } | |
2745 | #endif /* .debug_frame support */ | |
2746 | \f | |
2747 | /* And now, the support for symbolic debugging information. */ | |
2748 | #ifdef DWARF2_DEBUGGING_INFO | |
2749 | ||
2750 | /* NOTE: In the comments in this file, many references are made to | |
2751 | "Debugging Information Entries". This term is abbreviated as `DIE' | |
2752 | throughout the remainder of this file. */ | |
2753 | ||
2754 | /* An internal representation of the DWARF output is built, and then | |
2755 | walked to generate the DWARF debugging info. The walk of the internal | |
2756 | representation is done after the entire program has been compiled. | |
2757 | The types below are used to describe the internal representation. */ | |
2758 | ||
2759 | /* Various DIE's use offsets relative to the beginning of the | |
2760 | .debug_info section to refer to each other. */ | |
2761 | ||
2762 | typedef long int dw_offset; | |
2763 | ||
2764 | /* Define typedefs here to avoid circular dependencies. */ | |
2765 | ||
2766 | typedef struct dw_attr_struct *dw_attr_ref; | |
2767 | typedef struct dw_line_info_struct *dw_line_info_ref; | |
2768 | typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref; | |
2769 | typedef struct pubname_struct *pubname_ref; | |
2770 | typedef dw_die_ref *arange_ref; | |
2771 | ||
2772 | /* Each entry in the line_info_table maintains the file and | |
2773 | line number associated with the label generated for that | |
2774 | entry. The label gives the PC value associated with | |
2775 | the line number entry. */ | |
2776 | ||
2777 | typedef struct dw_line_info_struct | |
2778 | { | |
2779 | unsigned long dw_file_num; | |
2780 | unsigned long dw_line_num; | |
2781 | } | |
2782 | dw_line_info_entry; | |
2783 | ||
2784 | /* Line information for functions in separate sections; each one gets its | |
2785 | own sequence. */ | |
2786 | typedef struct dw_separate_line_info_struct | |
2787 | { | |
2788 | unsigned long dw_file_num; | |
2789 | unsigned long dw_line_num; | |
2790 | unsigned long function; | |
2791 | } | |
2792 | dw_separate_line_info_entry; | |
2793 | ||
2794 | /* Each DIE attribute has a field specifying the attribute kind, | |
2795 | a link to the next attribute in the chain, and an attribute value. | |
2796 | Attributes are typically linked below the DIE they modify. */ | |
2797 | ||
2798 | typedef struct dw_attr_struct | |
2799 | { | |
2800 | enum dwarf_attribute dw_attr; | |
2801 | dw_attr_ref dw_attr_next; | |
2802 | dw_val_node dw_attr_val; | |
2803 | } | |
2804 | dw_attr_node; | |
2805 | ||
2806 | /* The Debugging Information Entry (DIE) structure */ | |
2807 | ||
2808 | typedef struct die_struct | |
2809 | { | |
2810 | enum dwarf_tag die_tag; | |
881c6935 | 2811 | char *die_symbol; |
7d9d8943 AM |
2812 | dw_attr_ref die_attr; |
2813 | dw_die_ref die_parent; | |
2814 | dw_die_ref die_child; | |
2815 | dw_die_ref die_sib; | |
2816 | dw_offset die_offset; | |
2817 | unsigned long die_abbrev; | |
1bfb5f8f | 2818 | int die_mark; |
7d9d8943 AM |
2819 | } |
2820 | die_node; | |
2821 | ||
2822 | /* The pubname structure */ | |
2823 | ||
2824 | typedef struct pubname_struct | |
2825 | { | |
2826 | dw_die_ref die; | |
556273e0 | 2827 | char *name; |
7d9d8943 AM |
2828 | } |
2829 | pubname_entry; | |
2830 | ||
2831 | /* The limbo die list structure. */ | |
2832 | typedef struct limbo_die_struct | |
2833 | { | |
2834 | dw_die_ref die; | |
2835 | struct limbo_die_struct *next; | |
2836 | } | |
2837 | limbo_die_node; | |
2838 | ||
2839 | /* How to start an assembler comment. */ | |
2840 | #ifndef ASM_COMMENT_START | |
2841 | #define ASM_COMMENT_START ";#" | |
2842 | #endif | |
2843 | ||
2844 | /* Define a macro which returns non-zero for a TYPE_DECL which was | |
2845 | implicitly generated for a tagged type. | |
2846 | ||
2847 | Note that unlike the gcc front end (which generates a NULL named | |
2848 | TYPE_DECL node for each complete tagged type, each array type, and | |
2849 | each function type node created) the g++ front end generates a | |
2850 | _named_ TYPE_DECL node for each tagged type node created. | |
2851 | These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to | |
2852 | generate a DW_TAG_typedef DIE for them. */ | |
2853 | ||
2854 | #define TYPE_DECL_IS_STUB(decl) \ | |
2855 | (DECL_NAME (decl) == NULL_TREE \ | |
2856 | || (DECL_ARTIFICIAL (decl) \ | |
2857 | && is_tagged_type (TREE_TYPE (decl)) \ | |
2858 | && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \ | |
2859 | /* This is necessary for stub decls that \ | |
2860 | appear in nested inline functions. */ \ | |
2861 | || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \ | |
2862 | && (decl_ultimate_origin (decl) \ | |
2863 | == TYPE_STUB_DECL (TREE_TYPE (decl))))))) | |
2864 | ||
2865 | /* Information concerning the compilation unit's programming | |
2866 | language, and compiler version. */ | |
2867 | ||
2868 | extern int flag_traditional; | |
2869 | ||
2870 | /* Fixed size portion of the DWARF compilation unit header. */ | |
2871 | #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3) | |
2872 | ||
2873 | /* Fixed size portion of debugging line information prolog. */ | |
2874 | #define DWARF_LINE_PROLOG_HEADER_SIZE 5 | |
2875 | ||
2876 | /* Fixed size portion of public names info. */ | |
2877 | #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2) | |
2878 | ||
2879 | /* Fixed size portion of the address range info. */ | |
2880 | #define DWARF_ARANGES_HEADER_SIZE \ | |
2881 | (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \ | |
2882 | - DWARF_OFFSET_SIZE) | |
2883 | ||
2884 | /* Size of padding portion in the address range info. It must be | |
2885 | aligned to twice the pointer size. */ | |
2886 | #define DWARF_ARANGES_PAD_SIZE \ | |
2887 | (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \ | |
2888 | - (2 * DWARF_OFFSET_SIZE + 4)) | |
2889 | ||
9d147085 | 2890 | /* Use assembler line directives if available. */ |
7d9d8943 | 2891 | #ifndef DWARF2_ASM_LINE_DEBUG_INFO |
9d147085 RH |
2892 | #ifdef HAVE_AS_DWARF2_DEBUG_LINE |
2893 | #define DWARF2_ASM_LINE_DEBUG_INFO 1 | |
2894 | #else | |
7d9d8943 AM |
2895 | #define DWARF2_ASM_LINE_DEBUG_INFO 0 |
2896 | #endif | |
9d147085 | 2897 | #endif |
7d9d8943 AM |
2898 | |
2899 | /* Define the architecture-dependent minimum instruction length (in bytes). | |
2900 | In this implementation of DWARF, this field is used for information | |
2901 | purposes only. Since GCC generates assembly language, we have | |
2902 | no a priori knowledge of how many instruction bytes are generated | |
2903 | for each source line, and therefore can use only the DW_LNE_set_address | |
2904 | and DW_LNS_fixed_advance_pc line information commands. */ | |
2905 | ||
2906 | #ifndef DWARF_LINE_MIN_INSTR_LENGTH | |
2907 | #define DWARF_LINE_MIN_INSTR_LENGTH 4 | |
2908 | #endif | |
2909 | ||
2910 | /* Minimum line offset in a special line info. opcode. | |
2911 | This value was chosen to give a reasonable range of values. */ | |
2912 | #define DWARF_LINE_BASE -10 | |
2913 | ||
2914 | /* First special line opcde - leave room for the standard opcodes. */ | |
2915 | #define DWARF_LINE_OPCODE_BASE 10 | |
2916 | ||
2917 | /* Range of line offsets in a special line info. opcode. */ | |
2918 | #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1) | |
2919 | ||
2920 | /* Flag that indicates the initial value of the is_stmt_start flag. | |
2921 | In the present implementation, we do not mark any lines as | |
2922 | the beginning of a source statement, because that information | |
2923 | is not made available by the GCC front-end. */ | |
2924 | #define DWARF_LINE_DEFAULT_IS_STMT_START 1 | |
2925 | ||
2926 | /* This location is used by calc_die_sizes() to keep track | |
2927 | the offset of each DIE within the .debug_info section. */ | |
2928 | static unsigned long next_die_offset; | |
2929 | ||
2930 | /* Record the root of the DIE's built for the current compilation unit. */ | |
2931 | static dw_die_ref comp_unit_die; | |
2932 | ||
2933 | /* A list of DIEs with a NULL parent waiting to be relocated. */ | |
2934 | static limbo_die_node *limbo_die_list = 0; | |
2935 | ||
2e18bbae RH |
2936 | /* Structure used by lookup_filename to manage sets of filenames. */ |
2937 | struct file_table | |
2938 | { | |
2939 | char **table; | |
2940 | unsigned allocated; | |
2941 | unsigned in_use; | |
2942 | unsigned last_lookup_index; | |
2943 | }; | |
7d9d8943 AM |
2944 | |
2945 | /* Size (in elements) of increments by which we may expand the filename | |
2946 | table. */ | |
2947 | #define FILE_TABLE_INCREMENT 64 | |
2948 | ||
2e18bbae RH |
2949 | /* Filenames referenced by declarations this compilation unit. */ |
2950 | static struct file_table decl_file_table; | |
2951 | ||
2952 | /* Filenames referenced by line numbers in this compilation unit. */ | |
2953 | static struct file_table line_file_table; | |
2954 | ||
7d9d8943 AM |
2955 | /* Local pointer to the name of the main input file. Initialized in |
2956 | dwarf2out_init. */ | |
2957 | static const char *primary_filename; | |
2958 | ||
2959 | /* A pointer to the base of a table of references to DIE's that describe | |
2960 | declarations. The table is indexed by DECL_UID() which is a unique | |
2961 | number identifying each decl. */ | |
2962 | static dw_die_ref *decl_die_table; | |
2963 | ||
2964 | /* Number of elements currently allocated for the decl_die_table. */ | |
2965 | static unsigned decl_die_table_allocated; | |
2966 | ||
2967 | /* Number of elements in decl_die_table currently in use. */ | |
2968 | static unsigned decl_die_table_in_use; | |
2969 | ||
2970 | /* Size (in elements) of increments by which we may expand the | |
2971 | decl_die_table. */ | |
2972 | #define DECL_DIE_TABLE_INCREMENT 256 | |
2973 | ||
2974 | /* A pointer to the base of a table of references to declaration | |
2975 | scopes. This table is a display which tracks the nesting | |
2976 | of declaration scopes at the current scope and containing | |
2977 | scopes. This table is used to find the proper place to | |
2978 | define type declaration DIE's. */ | |
2979 | static tree *decl_scope_table; | |
2980 | ||
2981 | /* Number of elements currently allocated for the decl_scope_table. */ | |
2982 | static int decl_scope_table_allocated; | |
2983 | ||
2984 | /* Current level of nesting of declaration scopes. */ | |
2985 | static int decl_scope_depth; | |
2986 | ||
2987 | /* Size (in elements) of increments by which we may expand the | |
2988 | decl_scope_table. */ | |
2989 | #define DECL_SCOPE_TABLE_INCREMENT 64 | |
2990 | ||
2991 | /* A pointer to the base of a list of references to DIE's that | |
2992 | are uniquely identified by their tag, presence/absence of | |
2993 | children DIE's, and list of attribute/value pairs. */ | |
2994 | static dw_die_ref *abbrev_die_table; | |
2995 | ||
2996 | /* Number of elements currently allocated for abbrev_die_table. */ | |
2997 | static unsigned abbrev_die_table_allocated; | |
2998 | ||
2999 | /* Number of elements in type_die_table currently in use. */ | |
3000 | static unsigned abbrev_die_table_in_use; | |
3001 | ||
3002 | /* Size (in elements) of increments by which we may expand the | |
3003 | abbrev_die_table. */ | |
3004 | #define ABBREV_DIE_TABLE_INCREMENT 256 | |
3005 | ||
3006 | /* A pointer to the base of a table that contains line information | |
3007 | for each source code line in .text in the compilation unit. */ | |
3008 | static dw_line_info_ref line_info_table; | |
3009 | ||
3010 | /* Number of elements currently allocated for line_info_table. */ | |
3011 | static unsigned line_info_table_allocated; | |
3012 | ||
3013 | /* Number of elements in separate_line_info_table currently in use. */ | |
3014 | static unsigned separate_line_info_table_in_use; | |
3015 | ||
3016 | /* A pointer to the base of a table that contains line information | |
3017 | for each source code line outside of .text in the compilation unit. */ | |
3018 | static dw_separate_line_info_ref separate_line_info_table; | |
3019 | ||
3020 | /* Number of elements currently allocated for separate_line_info_table. */ | |
3021 | static unsigned separate_line_info_table_allocated; | |
3022 | ||
3023 | /* Number of elements in line_info_table currently in use. */ | |
3024 | static unsigned line_info_table_in_use; | |
3025 | ||
3026 | /* Size (in elements) of increments by which we may expand the | |
3027 | line_info_table. */ | |
3028 | #define LINE_INFO_TABLE_INCREMENT 1024 | |
3029 | ||
3030 | /* A pointer to the base of a table that contains a list of publicly | |
3031 | accessible names. */ | |
3032 | static pubname_ref pubname_table; | |
3033 | ||
3034 | /* Number of elements currently allocated for pubname_table. */ | |
3035 | static unsigned pubname_table_allocated; | |
3036 | ||
3037 | /* Number of elements in pubname_table currently in use. */ | |
3038 | static unsigned pubname_table_in_use; | |
3039 | ||
3040 | /* Size (in elements) of increments by which we may expand the | |
3041 | pubname_table. */ | |
3042 | #define PUBNAME_TABLE_INCREMENT 64 | |
3043 | ||
3044 | /* A pointer to the base of a table that contains a list of publicly | |
3045 | accessible names. */ | |
3046 | static arange_ref arange_table; | |
3047 | ||
3048 | /* Number of elements currently allocated for arange_table. */ | |
3049 | static unsigned arange_table_allocated; | |
3050 | ||
3051 | /* Number of elements in arange_table currently in use. */ | |
3052 | static unsigned arange_table_in_use; | |
3053 | ||
3054 | /* Size (in elements) of increments by which we may expand the | |
3055 | arange_table. */ | |
3056 | #define ARANGE_TABLE_INCREMENT 64 | |
3057 | ||
3058 | /* A pointer to the base of a list of incomplete types which might be | |
3059 | completed at some later time. */ | |
3060 | ||
3061 | static tree *incomplete_types_list; | |
3062 | ||
3063 | /* Number of elements currently allocated for the incomplete_types_list. */ | |
3064 | static unsigned incomplete_types_allocated; | |
3065 | ||
3066 | /* Number of elements of incomplete_types_list currently in use. */ | |
3067 | static unsigned incomplete_types; | |
3068 | ||
3069 | /* Size (in elements) of increments by which we may expand the incomplete | |
3070 | types list. Actually, a single hunk of space of this size should | |
3071 | be enough for most typical programs. */ | |
3072 | #define INCOMPLETE_TYPES_INCREMENT 64 | |
3073 | ||
3074 | /* Record whether the function being analyzed contains inlined functions. */ | |
3075 | static int current_function_has_inlines; | |
3076 | #if 0 && defined (MIPS_DEBUGGING_INFO) | |
3077 | static int comp_unit_has_inlines; | |
3078 | #endif | |
3079 | ||
3080 | /* Array of RTXes referenced by the debugging information, which therefore | |
3081 | must be kept around forever. We do this rather than perform GC on | |
3082 | the dwarf info because almost all of the dwarf info lives forever, and | |
3083 | it's easier to support non-GC frontends this way. */ | |
3084 | static varray_type used_rtx_varray; | |
3085 | ||
3086 | /* Forward declarations for functions defined in this file. */ | |
3087 | ||
3088 | static int is_pseudo_reg PARAMS ((rtx)); | |
3089 | static tree type_main_variant PARAMS ((tree)); | |
3090 | static int is_tagged_type PARAMS ((tree)); | |
3091 | static const char *dwarf_tag_name PARAMS ((unsigned)); | |
3092 | static const char *dwarf_attr_name PARAMS ((unsigned)); | |
3093 | static const char *dwarf_form_name PARAMS ((unsigned)); | |
3094 | #if 0 | |
3095 | static const char *dwarf_type_encoding_name PARAMS ((unsigned)); | |
3096 | #endif | |
3097 | static tree decl_ultimate_origin PARAMS ((tree)); | |
3098 | static tree block_ultimate_origin PARAMS ((tree)); | |
3099 | static tree decl_class_context PARAMS ((tree)); | |
3100 | static void add_dwarf_attr PARAMS ((dw_die_ref, dw_attr_ref)); | |
3101 | static void add_AT_flag PARAMS ((dw_die_ref, | |
3102 | enum dwarf_attribute, | |
3103 | unsigned)); | |
3104 | static void add_AT_int PARAMS ((dw_die_ref, | |
3105 | enum dwarf_attribute, long)); | |
3106 | static void add_AT_unsigned PARAMS ((dw_die_ref, | |
3107 | enum dwarf_attribute, | |
3108 | unsigned long)); | |
3109 | static void add_AT_long_long PARAMS ((dw_die_ref, | |
3110 | enum dwarf_attribute, | |
3111 | unsigned long, | |
3112 | unsigned long)); | |
3113 | static void add_AT_float PARAMS ((dw_die_ref, | |
3114 | enum dwarf_attribute, | |
3115 | unsigned, long *)); | |
3116 | static void add_AT_string PARAMS ((dw_die_ref, | |
3117 | enum dwarf_attribute, | |
3118 | const char *)); | |
3119 | static void add_AT_die_ref PARAMS ((dw_die_ref, | |
3120 | enum dwarf_attribute, | |
3121 | dw_die_ref)); | |
3122 | static void add_AT_fde_ref PARAMS ((dw_die_ref, | |
3123 | enum dwarf_attribute, | |
3124 | unsigned)); | |
3125 | static void add_AT_loc PARAMS ((dw_die_ref, | |
3126 | enum dwarf_attribute, | |
3127 | dw_loc_descr_ref)); | |
3128 | static void add_AT_addr PARAMS ((dw_die_ref, | |
3129 | enum dwarf_attribute, | |
3130 | rtx)); | |
3131 | static void add_AT_lbl_id PARAMS ((dw_die_ref, | |
3132 | enum dwarf_attribute, | |
3133 | const char *)); | |
3134 | static void add_AT_lbl_offset PARAMS ((dw_die_ref, | |
3135 | enum dwarf_attribute, | |
3136 | const char *)); | |
3137 | static dw_attr_ref get_AT PARAMS ((dw_die_ref, | |
3138 | enum dwarf_attribute)); | |
3139 | static const char *get_AT_low_pc PARAMS ((dw_die_ref)); | |
3140 | static const char *get_AT_hi_pc PARAMS ((dw_die_ref)); | |
3141 | static const char *get_AT_string PARAMS ((dw_die_ref, | |
3142 | enum dwarf_attribute)); | |
3143 | static int get_AT_flag PARAMS ((dw_die_ref, | |
3144 | enum dwarf_attribute)); | |
3145 | static unsigned get_AT_unsigned PARAMS ((dw_die_ref, | |
3146 | enum dwarf_attribute)); | |
3147 | static inline dw_die_ref get_AT_ref PARAMS ((dw_die_ref, | |
3148 | enum dwarf_attribute)); | |
3149 | static int is_c_family PARAMS ((void)); | |
28985b81 | 3150 | static int is_java PARAMS ((void)); |
7d9d8943 AM |
3151 | static int is_fortran PARAMS ((void)); |
3152 | static void remove_AT PARAMS ((dw_die_ref, | |
3153 | enum dwarf_attribute)); | |
3154 | static void remove_children PARAMS ((dw_die_ref)); | |
3155 | static void add_child_die PARAMS ((dw_die_ref, dw_die_ref)); | |
3156 | static dw_die_ref new_die PARAMS ((enum dwarf_tag, dw_die_ref)); | |
3157 | static dw_die_ref lookup_type_die PARAMS ((tree)); | |
3158 | static void equate_type_number_to_die PARAMS ((tree, dw_die_ref)); | |
3159 | static dw_die_ref lookup_decl_die PARAMS ((tree)); | |
3160 | static void equate_decl_number_to_die PARAMS ((tree, dw_die_ref)); | |
3161 | static void print_spaces PARAMS ((FILE *)); | |
3162 | static void print_die PARAMS ((dw_die_ref, FILE *)); | |
3163 | static void print_dwarf_line_table PARAMS ((FILE *)); | |
881c6935 JM |
3164 | static void reverse_die_lists PARAMS ((dw_die_ref)); |
3165 | static void reverse_all_dies PARAMS ((dw_die_ref)); | |
3166 | static dw_die_ref push_new_compile_unit PARAMS ((dw_die_ref, dw_die_ref)); | |
3167 | static dw_die_ref pop_compile_unit PARAMS ((dw_die_ref)); | |
3168 | static void loc_checksum PARAMS ((dw_loc_descr_ref, struct md5_ctx *)); | |
3169 | static void attr_checksum PARAMS ((dw_attr_ref, struct md5_ctx *)); | |
3170 | static void die_checksum PARAMS ((dw_die_ref, struct md5_ctx *)); | |
3171 | static void compute_section_prefix PARAMS ((dw_die_ref)); | |
3172 | static int is_type_die PARAMS ((dw_die_ref)); | |
3173 | static int is_comdat_die PARAMS ((dw_die_ref)); | |
3174 | static int is_symbol_die PARAMS ((dw_die_ref)); | |
3175 | static char *gen_internal_sym PARAMS ((void)); | |
3176 | static void assign_symbol_names PARAMS ((dw_die_ref)); | |
3177 | static void break_out_includes PARAMS ((dw_die_ref)); | |
7d9d8943 AM |
3178 | static void add_sibling_attributes PARAMS ((dw_die_ref)); |
3179 | static void build_abbrev_table PARAMS ((dw_die_ref)); | |
3180 | static unsigned long size_of_string PARAMS ((const char *)); | |
3181 | static int constant_size PARAMS ((long unsigned)); | |
3182 | static unsigned long size_of_die PARAMS ((dw_die_ref)); | |
3183 | static void calc_die_sizes PARAMS ((dw_die_ref)); | |
1bfb5f8f JM |
3184 | static void mark_dies PARAMS ((dw_die_ref)); |
3185 | static void unmark_dies PARAMS ((dw_die_ref)); | |
7d9d8943 AM |
3186 | static unsigned long size_of_line_prolog PARAMS ((void)); |
3187 | static unsigned long size_of_pubnames PARAMS ((void)); | |
3188 | static unsigned long size_of_aranges PARAMS ((void)); | |
3189 | static enum dwarf_form value_format PARAMS ((dw_attr_ref)); | |
3190 | static void output_value_format PARAMS ((dw_attr_ref)); | |
3191 | static void output_abbrev_section PARAMS ((void)); | |
881c6935 | 3192 | static void output_die_symbol PARAMS ((dw_die_ref)); |
7d9d8943 AM |
3193 | static void output_die PARAMS ((dw_die_ref)); |
3194 | static void output_compilation_unit_header PARAMS ((void)); | |
881c6935 | 3195 | static void output_comp_unit PARAMS ((dw_die_ref)); |
7d9d8943 AM |
3196 | static const char *dwarf2_name PARAMS ((tree, int)); |
3197 | static void add_pubname PARAMS ((tree, dw_die_ref)); | |
3198 | static void output_pubnames PARAMS ((void)); | |
3199 | static void add_arange PARAMS ((tree, dw_die_ref)); | |
3200 | static void output_aranges PARAMS ((void)); | |
3201 | static void output_line_info PARAMS ((void)); | |
0b34cf1e | 3202 | static void output_file_names PARAMS ((void)); |
7d9d8943 AM |
3203 | static dw_die_ref base_type_die PARAMS ((tree)); |
3204 | static tree root_type PARAMS ((tree)); | |
3205 | static int is_base_type PARAMS ((tree)); | |
3206 | static dw_die_ref modified_type_die PARAMS ((tree, int, int, dw_die_ref)); | |
3207 | static int type_is_enum PARAMS ((tree)); | |
3208 | static unsigned int reg_number PARAMS ((rtx)); | |
3209 | static dw_loc_descr_ref reg_loc_descriptor PARAMS ((rtx)); | |
d8041cc8 | 3210 | static dw_loc_descr_ref int_loc_descriptor PARAMS ((HOST_WIDE_INT)); |
7d9d8943 AM |
3211 | static dw_loc_descr_ref based_loc_descr PARAMS ((unsigned, long)); |
3212 | static int is_based_loc PARAMS ((rtx)); | |
3213 | static dw_loc_descr_ref mem_loc_descriptor PARAMS ((rtx, enum machine_mode mode)); | |
3214 | static dw_loc_descr_ref concat_loc_descriptor PARAMS ((rtx, rtx)); | |
3215 | static dw_loc_descr_ref loc_descriptor PARAMS ((rtx)); | |
d8041cc8 | 3216 | static dw_loc_descr_ref loc_descriptor_from_tree PARAMS ((tree, int)); |
7d9d8943 AM |
3217 | static HOST_WIDE_INT ceiling PARAMS ((HOST_WIDE_INT, unsigned int)); |
3218 | static tree field_type PARAMS ((tree)); | |
3219 | static unsigned int simple_type_align_in_bits PARAMS ((tree)); | |
5f446d21 | 3220 | static unsigned int simple_decl_align_in_bits PARAMS ((tree)); |
7d9d8943 AM |
3221 | static unsigned HOST_WIDE_INT simple_type_size_in_bits PARAMS ((tree)); |
3222 | static HOST_WIDE_INT field_byte_offset PARAMS ((tree)); | |
3223 | static void add_AT_location_description PARAMS ((dw_die_ref, | |
3224 | enum dwarf_attribute, rtx)); | |
3225 | static void add_data_member_location_attribute PARAMS ((dw_die_ref, tree)); | |
3226 | static void add_const_value_attribute PARAMS ((dw_die_ref, rtx)); | |
d8041cc8 | 3227 | static rtx rtl_for_decl_location PARAMS ((tree)); |
7d9d8943 | 3228 | static void add_location_or_const_value_attribute PARAMS ((dw_die_ref, tree)); |
1bfb5f8f | 3229 | static void tree_add_const_value_attribute PARAMS ((dw_die_ref, tree)); |
7d9d8943 AM |
3230 | static void add_name_attribute PARAMS ((dw_die_ref, const char *)); |
3231 | static void add_bound_info PARAMS ((dw_die_ref, | |
3232 | enum dwarf_attribute, tree)); | |
3233 | static void add_subscript_info PARAMS ((dw_die_ref, tree)); | |
3234 | static void add_byte_size_attribute PARAMS ((dw_die_ref, tree)); | |
3235 | static void add_bit_offset_attribute PARAMS ((dw_die_ref, tree)); | |
3236 | static void add_bit_size_attribute PARAMS ((dw_die_ref, tree)); | |
3237 | static void add_prototyped_attribute PARAMS ((dw_die_ref, tree)); | |
3238 | static void add_abstract_origin_attribute PARAMS ((dw_die_ref, tree)); | |
3239 | static void add_pure_or_virtual_attribute PARAMS ((dw_die_ref, tree)); | |
3240 | static void add_src_coords_attributes PARAMS ((dw_die_ref, tree)); | |
3241 | static void add_name_and_src_coords_attributes PARAMS ((dw_die_ref, tree)); | |
3242 | static void push_decl_scope PARAMS ((tree)); | |
3243 | static dw_die_ref scope_die_for PARAMS ((tree, dw_die_ref)); | |
3244 | static void pop_decl_scope PARAMS ((void)); | |
3245 | static void add_type_attribute PARAMS ((dw_die_ref, tree, int, int, | |
3246 | dw_die_ref)); | |
3247 | static const char *type_tag PARAMS ((tree)); | |
3248 | static tree member_declared_type PARAMS ((tree)); | |
3249 | #if 0 | |
3250 | static const char *decl_start_label PARAMS ((tree)); | |
3251 | #endif | |
3252 | static void gen_array_type_die PARAMS ((tree, dw_die_ref)); | |
3253 | static void gen_set_type_die PARAMS ((tree, dw_die_ref)); | |
3254 | #if 0 | |
3255 | static void gen_entry_point_die PARAMS ((tree, dw_die_ref)); | |
3256 | #endif | |
3257 | static void gen_inlined_enumeration_type_die PARAMS ((tree, dw_die_ref)); | |
3258 | static void gen_inlined_structure_type_die PARAMS ((tree, dw_die_ref)); | |
3259 | static void gen_inlined_union_type_die PARAMS ((tree, dw_die_ref)); | |
3260 | static void gen_enumeration_type_die PARAMS ((tree, dw_die_ref)); | |
3261 | static dw_die_ref gen_formal_parameter_die PARAMS ((tree, dw_die_ref)); | |
3262 | static void gen_unspecified_parameters_die PARAMS ((tree, dw_die_ref)); | |
3263 | static void gen_formal_types_die PARAMS ((tree, dw_die_ref)); | |
3264 | static void gen_subprogram_die PARAMS ((tree, dw_die_ref)); | |
3265 | static void gen_variable_die PARAMS ((tree, dw_die_ref)); | |
3266 | static void gen_label_die PARAMS ((tree, dw_die_ref)); | |
3267 | static void gen_lexical_block_die PARAMS ((tree, dw_die_ref, int)); | |
3268 | static void gen_inlined_subroutine_die PARAMS ((tree, dw_die_ref, int)); | |
3269 | static void gen_field_die PARAMS ((tree, dw_die_ref)); | |
3270 | static void gen_ptr_to_mbr_type_die PARAMS ((tree, dw_die_ref)); | |
3271 | static dw_die_ref gen_compile_unit_die PARAMS ((const char *)); | |
3272 | static void gen_string_type_die PARAMS ((tree, dw_die_ref)); | |
3273 | static void gen_inheritance_die PARAMS ((tree, dw_die_ref)); | |
3274 | static void gen_member_die PARAMS ((tree, dw_die_ref)); | |
3275 | static void gen_struct_or_union_type_die PARAMS ((tree, dw_die_ref)); | |
3276 | static void gen_subroutine_type_die PARAMS ((tree, dw_die_ref)); | |
3277 | static void gen_typedef_die PARAMS ((tree, dw_die_ref)); | |
3278 | static void gen_type_die PARAMS ((tree, dw_die_ref)); | |
3279 | static void gen_tagged_type_instantiation_die PARAMS ((tree, dw_die_ref)); | |
3280 | static void gen_block_die PARAMS ((tree, dw_die_ref, int)); | |
3281 | static void decls_for_scope PARAMS ((tree, dw_die_ref, int)); | |
3282 | static int is_redundant_typedef PARAMS ((tree)); | |
3283 | static void gen_decl_die PARAMS ((tree, dw_die_ref)); | |
2e18bbae RH |
3284 | static unsigned lookup_filename PARAMS ((struct file_table *, |
3285 | const char *)); | |
3286 | static void init_file_table PARAMS ((struct file_table *)); | |
7d9d8943 AM |
3287 | static void add_incomplete_type PARAMS ((tree)); |
3288 | static void retry_incomplete_types PARAMS ((void)); | |
3289 | static void gen_type_die_for_member PARAMS ((tree, tree, dw_die_ref)); | |
7d9d8943 AM |
3290 | static rtx save_rtx PARAMS ((rtx)); |
3291 | static void splice_child_die PARAMS ((dw_die_ref, dw_die_ref)); | |
fc608b03 | 3292 | static int file_info_cmp PARAMS ((const void *, const void *)); |
7d9d8943 AM |
3293 | |
3294 | /* Section names used to hold DWARF debugging information. */ | |
3295 | #ifndef DEBUG_INFO_SECTION | |
3296 | #define DEBUG_INFO_SECTION ".debug_info" | |
3297 | #endif | |
3298 | #ifndef ABBREV_SECTION | |
3299 | #define ABBREV_SECTION ".debug_abbrev" | |
3300 | #endif | |
3301 | #ifndef ARANGES_SECTION | |
3302 | #define ARANGES_SECTION ".debug_aranges" | |
3303 | #endif | |
3304 | #ifndef DW_MACINFO_SECTION | |
3305 | #define DW_MACINFO_SECTION ".debug_macinfo" | |
3306 | #endif | |
3307 | #ifndef DEBUG_LINE_SECTION | |
3308 | #define DEBUG_LINE_SECTION ".debug_line" | |
3309 | #endif | |
3310 | #ifndef LOC_SECTION | |
3311 | #define LOC_SECTION ".debug_loc" | |
3312 | #endif | |
3313 | #ifndef PUBNAMES_SECTION | |
3314 | #define PUBNAMES_SECTION ".debug_pubnames" | |
3315 | #endif | |
3316 | #ifndef STR_SECTION | |
3317 | #define STR_SECTION ".debug_str" | |
3318 | #endif | |
3319 | ||
3320 | /* Standard ELF section names for compiled code and data. */ | |
3321 | #ifndef TEXT_SECTION | |
3322 | #define TEXT_SECTION ".text" | |
3323 | #endif | |
3324 | #ifndef DATA_SECTION | |
3325 | #define DATA_SECTION ".data" | |
3326 | #endif | |
3327 | #ifndef BSS_SECTION | |
3328 | #define BSS_SECTION ".bss" | |
3329 | #endif | |
3330 | ||
3331 | /* Labels we insert at beginning sections we can reference instead of | |
556273e0 | 3332 | the section names themselves. */ |
7d9d8943 AM |
3333 | |
3334 | #ifndef TEXT_SECTION_LABEL | |
3335 | #define TEXT_SECTION_LABEL "Ltext" | |
3336 | #endif | |
3337 | #ifndef DEBUG_LINE_SECTION_LABEL | |
3338 | #define DEBUG_LINE_SECTION_LABEL "Ldebug_line" | |
3339 | #endif | |
3340 | #ifndef DEBUG_INFO_SECTION_LABEL | |
3341 | #define DEBUG_INFO_SECTION_LABEL "Ldebug_info" | |
3342 | #endif | |
3343 | #ifndef ABBREV_SECTION_LABEL | |
3344 | #define ABBREV_SECTION_LABEL "Ldebug_abbrev" | |
3345 | #endif | |
3346 | ||
7d9d8943 AM |
3347 | /* Definitions of defaults for formats and names of various special |
3348 | (artificial) labels which may be generated within this file (when the -g | |
3349 | options is used and DWARF_DEBUGGING_INFO is in effect. | |
3350 | If necessary, these may be overridden from within the tm.h file, but | |
3351 | typically, overriding these defaults is unnecessary. */ | |
3352 | ||
3353 | static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3354 | static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3355 | static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3356 | static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3357 | static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
3358 | ||
3359 | #ifndef TEXT_END_LABEL | |
3360 | #define TEXT_END_LABEL "Letext" | |
3361 | #endif | |
3362 | #ifndef DATA_END_LABEL | |
3363 | #define DATA_END_LABEL "Ledata" | |
3364 | #endif | |
3365 | #ifndef BSS_END_LABEL | |
3366 | #define BSS_END_LABEL "Lebss" | |
3367 | #endif | |
7d9d8943 AM |
3368 | #ifndef BLOCK_BEGIN_LABEL |
3369 | #define BLOCK_BEGIN_LABEL "LBB" | |
3370 | #endif | |
3371 | #ifndef BLOCK_END_LABEL | |
3372 | #define BLOCK_END_LABEL "LBE" | |
3373 | #endif | |
3374 | #ifndef BODY_BEGIN_LABEL | |
3375 | #define BODY_BEGIN_LABEL "Lbb" | |
3376 | #endif | |
3377 | #ifndef BODY_END_LABEL | |
3378 | #define BODY_END_LABEL "Lbe" | |
3379 | #endif | |
3380 | #ifndef LINE_CODE_LABEL | |
3381 | #define LINE_CODE_LABEL "LM" | |
3382 | #endif | |
3383 | #ifndef SEPARATE_LINE_CODE_LABEL | |
3384 | #define SEPARATE_LINE_CODE_LABEL "LSM" | |
3385 | #endif | |
3386 | \f | |
3387 | /* We allow a language front-end to designate a function that is to be | |
3388 | called to "demangle" any name before it it put into a DIE. */ | |
3389 | ||
3390 | static const char *(*demangle_name_func) PARAMS ((const char *)); | |
3391 | ||
3392 | void | |
3393 | dwarf2out_set_demangle_name_func (func) | |
3394 | const char *(*func) PARAMS ((const char *)); | |
3395 | { | |
3396 | demangle_name_func = func; | |
3397 | } | |
3398 | \f | |
3399 | /* Return an rtx like ORIG which lives forever. If we're doing GC, | |
3400 | that means adding it to used_rtx_varray. If not, that means making | |
3401 | a copy on the permanent_obstack. */ | |
3402 | ||
3403 | static rtx | |
3404 | save_rtx (orig) | |
3405 | register rtx orig; | |
3406 | { | |
1f8f4a0b | 3407 | VARRAY_PUSH_RTX (used_rtx_varray, orig); |
7d9d8943 AM |
3408 | |
3409 | return orig; | |
3410 | } | |
3411 | ||
3412 | /* Test if rtl node points to a pseudo register. */ | |
3413 | ||
3414 | static inline int | |
3415 | is_pseudo_reg (rtl) | |
3416 | register rtx rtl; | |
3417 | { | |
3418 | return ((GET_CODE (rtl) == REG && REGNO (rtl) >= FIRST_PSEUDO_REGISTER) | |
3419 | || (GET_CODE (rtl) == SUBREG | |
3420 | && REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)); | |
3421 | } | |
3422 | ||
3423 | /* Return a reference to a type, with its const and volatile qualifiers | |
3424 | removed. */ | |
3425 | ||
3426 | static inline tree | |
3427 | type_main_variant (type) | |
3428 | register tree type; | |
3429 | { | |
3430 | type = TYPE_MAIN_VARIANT (type); | |
3431 | ||
556273e0 | 3432 | /* There really should be only one main variant among any group of variants |
7d9d8943 AM |
3433 | of a given type (and all of the MAIN_VARIANT values for all members of |
3434 | the group should point to that one type) but sometimes the C front-end | |
3435 | messes this up for array types, so we work around that bug here. */ | |
3436 | ||
3437 | if (TREE_CODE (type) == ARRAY_TYPE) | |
3438 | while (type != TYPE_MAIN_VARIANT (type)) | |
3439 | type = TYPE_MAIN_VARIANT (type); | |
3440 | ||
3441 | return type; | |
3442 | } | |
3443 | ||
3444 | /* Return non-zero if the given type node represents a tagged type. */ | |
3445 | ||
3446 | static inline int | |
3447 | is_tagged_type (type) | |
3448 | register tree type; | |
3449 | { | |
3450 | register enum tree_code code = TREE_CODE (type); | |
3451 | ||
3452 | return (code == RECORD_TYPE || code == UNION_TYPE | |
3453 | || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE); | |
3454 | } | |
3455 | ||
3456 | /* Convert a DIE tag into its string name. */ | |
3457 | ||
3458 | static const char * | |
3459 | dwarf_tag_name (tag) | |
3460 | register unsigned tag; | |
3461 | { | |
3462 | switch (tag) | |
3463 | { | |
3464 | case DW_TAG_padding: | |
3465 | return "DW_TAG_padding"; | |
3466 | case DW_TAG_array_type: | |
3467 | return "DW_TAG_array_type"; | |
3468 | case DW_TAG_class_type: | |
3469 | return "DW_TAG_class_type"; | |
3470 | case DW_TAG_entry_point: | |
3471 | return "DW_TAG_entry_point"; | |
3472 | case DW_TAG_enumeration_type: | |
3473 | return "DW_TAG_enumeration_type"; | |
3474 | case DW_TAG_formal_parameter: | |
3475 | return "DW_TAG_formal_parameter"; | |
3476 | case DW_TAG_imported_declaration: | |
3477 | return "DW_TAG_imported_declaration"; | |
3478 | case DW_TAG_label: | |
3479 | return "DW_TAG_label"; | |
3480 | case DW_TAG_lexical_block: | |
3481 | return "DW_TAG_lexical_block"; | |
3482 | case DW_TAG_member: | |
3483 | return "DW_TAG_member"; | |
3484 | case DW_TAG_pointer_type: | |
3485 | return "DW_TAG_pointer_type"; | |
3486 | case DW_TAG_reference_type: | |
3487 | return "DW_TAG_reference_type"; | |
3488 | case DW_TAG_compile_unit: | |
3489 | return "DW_TAG_compile_unit"; | |
3490 | case DW_TAG_string_type: | |
3491 | return "DW_TAG_string_type"; | |
3492 | case DW_TAG_structure_type: | |
3493 | return "DW_TAG_structure_type"; | |
3494 | case DW_TAG_subroutine_type: | |
3495 | return "DW_TAG_subroutine_type"; | |
3496 | case DW_TAG_typedef: | |
3497 | return "DW_TAG_typedef"; | |
3498 | case DW_TAG_union_type: | |
3499 | return "DW_TAG_union_type"; | |
3500 | case DW_TAG_unspecified_parameters: | |
3501 | return "DW_TAG_unspecified_parameters"; | |
3502 | case DW_TAG_variant: | |
3503 | return "DW_TAG_variant"; | |
3504 | case DW_TAG_common_block: | |
3505 | return "DW_TAG_common_block"; | |
3506 | case DW_TAG_common_inclusion: | |
3507 | return "DW_TAG_common_inclusion"; | |
3508 | case DW_TAG_inheritance: | |
3509 | return "DW_TAG_inheritance"; | |
3510 | case DW_TAG_inlined_subroutine: | |
3511 | return "DW_TAG_inlined_subroutine"; | |
3512 | case DW_TAG_module: | |
3513 | return "DW_TAG_module"; | |
3514 | case DW_TAG_ptr_to_member_type: | |
3515 | return "DW_TAG_ptr_to_member_type"; | |
3516 | case DW_TAG_set_type: | |
3517 | return "DW_TAG_set_type"; | |
3518 | case DW_TAG_subrange_type: | |
3519 | return "DW_TAG_subrange_type"; | |
3520 | case DW_TAG_with_stmt: | |
3521 | return "DW_TAG_with_stmt"; | |
3522 | case DW_TAG_access_declaration: | |
3523 | return "DW_TAG_access_declaration"; | |
3524 | case DW_TAG_base_type: | |
3525 | return "DW_TAG_base_type"; | |
3526 | case DW_TAG_catch_block: | |
3527 | return "DW_TAG_catch_block"; | |
3528 | case DW_TAG_const_type: | |
3529 | return "DW_TAG_const_type"; | |
3530 | case DW_TAG_constant: | |
3531 | return "DW_TAG_constant"; | |
3532 | case DW_TAG_enumerator: | |
3533 | return "DW_TAG_enumerator"; | |
3534 | case DW_TAG_file_type: | |
3535 | return "DW_TAG_file_type"; | |
3536 | case DW_TAG_friend: | |
3537 | return "DW_TAG_friend"; | |
3538 | case DW_TAG_namelist: | |
3539 | return "DW_TAG_namelist"; | |
3540 | case DW_TAG_namelist_item: | |
3541 | return "DW_TAG_namelist_item"; | |
3542 | case DW_TAG_packed_type: | |
3543 | return "DW_TAG_packed_type"; | |
3544 | case DW_TAG_subprogram: | |
3545 | return "DW_TAG_subprogram"; | |
3546 | case DW_TAG_template_type_param: | |
3547 | return "DW_TAG_template_type_param"; | |
3548 | case DW_TAG_template_value_param: | |
3549 | return "DW_TAG_template_value_param"; | |
3550 | case DW_TAG_thrown_type: | |
3551 | return "DW_TAG_thrown_type"; | |
3552 | case DW_TAG_try_block: | |
3553 | return "DW_TAG_try_block"; | |
3554 | case DW_TAG_variant_part: | |
3555 | return "DW_TAG_variant_part"; | |
3556 | case DW_TAG_variable: | |
3557 | return "DW_TAG_variable"; | |
3558 | case DW_TAG_volatile_type: | |
3559 | return "DW_TAG_volatile_type"; | |
3560 | case DW_TAG_MIPS_loop: | |
3561 | return "DW_TAG_MIPS_loop"; | |
3562 | case DW_TAG_format_label: | |
3563 | return "DW_TAG_format_label"; | |
3564 | case DW_TAG_function_template: | |
3565 | return "DW_TAG_function_template"; | |
3566 | case DW_TAG_class_template: | |
3567 | return "DW_TAG_class_template"; | |
881c6935 JM |
3568 | case DW_TAG_GNU_BINCL: |
3569 | return "DW_TAG_GNU_BINCL"; | |
3570 | case DW_TAG_GNU_EINCL: | |
3571 | return "DW_TAG_GNU_EINCL"; | |
7d9d8943 AM |
3572 | default: |
3573 | return "DW_TAG_<unknown>"; | |
3574 | } | |
3575 | } | |
3576 | ||
3577 | /* Convert a DWARF attribute code into its string name. */ | |
3578 | ||
3579 | static const char * | |
3580 | dwarf_attr_name (attr) | |
3581 | register unsigned attr; | |
3582 | { | |
3583 | switch (attr) | |
3584 | { | |
3585 | case DW_AT_sibling: | |
3586 | return "DW_AT_sibling"; | |
3587 | case DW_AT_location: | |
3588 | return "DW_AT_location"; | |
3589 | case DW_AT_name: | |
3590 | return "DW_AT_name"; | |
3591 | case DW_AT_ordering: | |
3592 | return "DW_AT_ordering"; | |
3593 | case DW_AT_subscr_data: | |
3594 | return "DW_AT_subscr_data"; | |
3595 | case DW_AT_byte_size: | |
3596 | return "DW_AT_byte_size"; | |
3597 | case DW_AT_bit_offset: | |
3598 | return "DW_AT_bit_offset"; | |
3599 | case DW_AT_bit_size: | |
3600 | return "DW_AT_bit_size"; | |
3601 | case DW_AT_element_list: | |
3602 | return "DW_AT_element_list"; | |
3603 | case DW_AT_stmt_list: | |
3604 | return "DW_AT_stmt_list"; | |
3605 | case DW_AT_low_pc: | |
3606 | return "DW_AT_low_pc"; | |
3607 | case DW_AT_high_pc: | |
3608 | return "DW_AT_high_pc"; | |
3609 | case DW_AT_language: | |
3610 | return "DW_AT_language"; | |
3611 | case DW_AT_member: | |
3612 | return "DW_AT_member"; | |
3613 | case DW_AT_discr: | |
3614 | return "DW_AT_discr"; | |
3615 | case DW_AT_discr_value: | |
3616 | return "DW_AT_discr_value"; | |
3617 | case DW_AT_visibility: | |
3618 | return "DW_AT_visibility"; | |
3619 | case DW_AT_import: | |
3620 | return "DW_AT_import"; | |
3621 | case DW_AT_string_length: | |
3622 | return "DW_AT_string_length"; | |
3623 | case DW_AT_common_reference: | |
3624 | return "DW_AT_common_reference"; | |
3625 | case DW_AT_comp_dir: | |
3626 | return "DW_AT_comp_dir"; | |
3627 | case DW_AT_const_value: | |
3628 | return "DW_AT_const_value"; | |
3629 | case DW_AT_containing_type: | |
3630 | return "DW_AT_containing_type"; | |
3631 | case DW_AT_default_value: | |
3632 | return "DW_AT_default_value"; | |
3633 | case DW_AT_inline: | |
3634 | return "DW_AT_inline"; | |
3635 | case DW_AT_is_optional: | |
3636 | return "DW_AT_is_optional"; | |
3637 | case DW_AT_lower_bound: | |
3638 | return "DW_AT_lower_bound"; | |
3639 | case DW_AT_producer: | |
3640 | return "DW_AT_producer"; | |
3641 | case DW_AT_prototyped: | |
3642 | return "DW_AT_prototyped"; | |
3643 | case DW_AT_return_addr: | |
3644 | return "DW_AT_return_addr"; | |
3645 | case DW_AT_start_scope: | |
3646 | return "DW_AT_start_scope"; | |
3647 | case DW_AT_stride_size: | |
3648 | return "DW_AT_stride_size"; | |
3649 | case DW_AT_upper_bound: | |
3650 | return "DW_AT_upper_bound"; | |
3651 | case DW_AT_abstract_origin: | |
3652 | return "DW_AT_abstract_origin"; | |
3653 | case DW_AT_accessibility: | |
3654 | return "DW_AT_accessibility"; | |
3655 | case DW_AT_address_class: | |
3656 | return "DW_AT_address_class"; | |
3657 | case DW_AT_artificial: | |
3658 | return "DW_AT_artificial"; | |
3659 | case DW_AT_base_types: | |
3660 | return "DW_AT_base_types"; | |
3661 | case DW_AT_calling_convention: | |
3662 | return "DW_AT_calling_convention"; | |
3663 | case DW_AT_count: | |
3664 | return "DW_AT_count"; | |
3665 | case DW_AT_data_member_location: | |
3666 | return "DW_AT_data_member_location"; | |
3667 | case DW_AT_decl_column: | |
3668 | return "DW_AT_decl_column"; | |
3669 | case DW_AT_decl_file: | |
3670 | return "DW_AT_decl_file"; | |
3671 | case DW_AT_decl_line: | |
3672 | return "DW_AT_decl_line"; | |
3673 | case DW_AT_declaration: | |
3674 | return "DW_AT_declaration"; | |
3675 | case DW_AT_discr_list: | |
3676 | return "DW_AT_discr_list"; | |
3677 | case DW_AT_encoding: | |
3678 | return "DW_AT_encoding"; | |
3679 | case DW_AT_external: | |
3680 | return "DW_AT_external"; | |
3681 | case DW_AT_frame_base: | |
3682 | return "DW_AT_frame_base"; | |
3683 | case DW_AT_friend: | |
3684 | return "DW_AT_friend"; | |
3685 | case DW_AT_identifier_case: | |
3686 | return "DW_AT_identifier_case"; | |
3687 | case DW_AT_macro_info: | |
3688 | return "DW_AT_macro_info"; | |
3689 | case DW_AT_namelist_items: | |
3690 | return "DW_AT_namelist_items"; | |
3691 | case DW_AT_priority: | |
3692 | return "DW_AT_priority"; | |
3693 | case DW_AT_segment: | |
3694 | return "DW_AT_segment"; | |
3695 | case DW_AT_specification: | |
3696 | return "DW_AT_specification"; | |
3697 | case DW_AT_static_link: | |
3698 | return "DW_AT_static_link"; | |
3699 | case DW_AT_type: | |
3700 | return "DW_AT_type"; | |
3701 | case DW_AT_use_location: | |
3702 | return "DW_AT_use_location"; | |
3703 | case DW_AT_variable_parameter: | |
3704 | return "DW_AT_variable_parameter"; | |
3705 | case DW_AT_virtuality: | |
3706 | return "DW_AT_virtuality"; | |
3707 | case DW_AT_vtable_elem_location: | |
3708 | return "DW_AT_vtable_elem_location"; | |
3709 | ||
3710 | case DW_AT_MIPS_fde: | |
3711 | return "DW_AT_MIPS_fde"; | |
3712 | case DW_AT_MIPS_loop_begin: | |
3713 | return "DW_AT_MIPS_loop_begin"; | |
3714 | case DW_AT_MIPS_tail_loop_begin: | |
3715 | return "DW_AT_MIPS_tail_loop_begin"; | |
3716 | case DW_AT_MIPS_epilog_begin: | |
3717 | return "DW_AT_MIPS_epilog_begin"; | |
3718 | case DW_AT_MIPS_loop_unroll_factor: | |
3719 | return "DW_AT_MIPS_loop_unroll_factor"; | |
3720 | case DW_AT_MIPS_software_pipeline_depth: | |
3721 | return "DW_AT_MIPS_software_pipeline_depth"; | |
3722 | case DW_AT_MIPS_linkage_name: | |
3723 | return "DW_AT_MIPS_linkage_name"; | |
3724 | case DW_AT_MIPS_stride: | |
3725 | return "DW_AT_MIPS_stride"; | |
3726 | case DW_AT_MIPS_abstract_name: | |
3727 | return "DW_AT_MIPS_abstract_name"; | |
3728 | case DW_AT_MIPS_clone_origin: | |
3729 | return "DW_AT_MIPS_clone_origin"; | |
3730 | case DW_AT_MIPS_has_inlines: | |
3731 | return "DW_AT_MIPS_has_inlines"; | |
3732 | ||
3733 | case DW_AT_sf_names: | |
3734 | return "DW_AT_sf_names"; | |
3735 | case DW_AT_src_info: | |
3736 | return "DW_AT_src_info"; | |
3737 | case DW_AT_mac_info: | |
3738 | return "DW_AT_mac_info"; | |
3739 | case DW_AT_src_coords: | |
3740 | return "DW_AT_src_coords"; | |
3741 | case DW_AT_body_begin: | |
3742 | return "DW_AT_body_begin"; | |
3743 | case DW_AT_body_end: | |
3744 | return "DW_AT_body_end"; | |
3745 | default: | |
3746 | return "DW_AT_<unknown>"; | |
3747 | } | |
3748 | } | |
3749 | ||
3750 | /* Convert a DWARF value form code into its string name. */ | |
3751 | ||
3752 | static const char * | |
3753 | dwarf_form_name (form) | |
3754 | register unsigned form; | |
3755 | { | |
3756 | switch (form) | |
3757 | { | |
3758 | case DW_FORM_addr: | |
3759 | return "DW_FORM_addr"; | |
3760 | case DW_FORM_block2: | |
3761 | return "DW_FORM_block2"; | |
3762 | case DW_FORM_block4: | |
3763 | return "DW_FORM_block4"; | |
3764 | case DW_FORM_data2: | |
3765 | return "DW_FORM_data2"; | |
3766 | case DW_FORM_data4: | |
3767 | return "DW_FORM_data4"; | |
3768 | case DW_FORM_data8: | |
3769 | return "DW_FORM_data8"; | |
3770 | case DW_FORM_string: | |
3771 | return "DW_FORM_string"; | |
3772 | case DW_FORM_block: | |
3773 | return "DW_FORM_block"; | |
3774 | case DW_FORM_block1: | |
3775 | return "DW_FORM_block1"; | |
3776 | case DW_FORM_data1: | |
3777 | return "DW_FORM_data1"; | |
3778 | case DW_FORM_flag: | |
3779 | return "DW_FORM_flag"; | |
3780 | case DW_FORM_sdata: | |
3781 | return "DW_FORM_sdata"; | |
3782 | case DW_FORM_strp: | |
3783 | return "DW_FORM_strp"; | |
3784 | case DW_FORM_udata: | |
3785 | return "DW_FORM_udata"; | |
3786 | case DW_FORM_ref_addr: | |
3787 | return "DW_FORM_ref_addr"; | |
3788 | case DW_FORM_ref1: | |
3789 | return "DW_FORM_ref1"; | |
3790 | case DW_FORM_ref2: | |
3791 | return "DW_FORM_ref2"; | |
3792 | case DW_FORM_ref4: | |
3793 | return "DW_FORM_ref4"; | |
3794 | case DW_FORM_ref8: | |
3795 | return "DW_FORM_ref8"; | |
3796 | case DW_FORM_ref_udata: | |
3797 | return "DW_FORM_ref_udata"; | |
3798 | case DW_FORM_indirect: | |
3799 | return "DW_FORM_indirect"; | |
3f76745e | 3800 | default: |
7d9d8943 | 3801 | return "DW_FORM_<unknown>"; |
a3f97cbb JW |
3802 | } |
3803 | } | |
3804 | ||
3f76745e | 3805 | /* Convert a DWARF type code into its string name. */ |
71dfc51f | 3806 | |
487a6e06 | 3807 | #if 0 |
d560ee52 | 3808 | static const char * |
3f76745e JM |
3809 | dwarf_type_encoding_name (enc) |
3810 | register unsigned enc; | |
a3f97cbb | 3811 | { |
3f76745e | 3812 | switch (enc) |
a3f97cbb | 3813 | { |
3f76745e JM |
3814 | case DW_ATE_address: |
3815 | return "DW_ATE_address"; | |
3816 | case DW_ATE_boolean: | |
3817 | return "DW_ATE_boolean"; | |
3818 | case DW_ATE_complex_float: | |
3819 | return "DW_ATE_complex_float"; | |
3820 | case DW_ATE_float: | |
3821 | return "DW_ATE_float"; | |
3822 | case DW_ATE_signed: | |
3823 | return "DW_ATE_signed"; | |
3824 | case DW_ATE_signed_char: | |
3825 | return "DW_ATE_signed_char"; | |
3826 | case DW_ATE_unsigned: | |
3827 | return "DW_ATE_unsigned"; | |
3828 | case DW_ATE_unsigned_char: | |
3829 | return "DW_ATE_unsigned_char"; | |
3830 | default: | |
3831 | return "DW_ATE_<unknown>"; | |
3832 | } | |
a3f97cbb | 3833 | } |
487a6e06 | 3834 | #endif |
3f76745e JM |
3835 | \f |
3836 | /* Determine the "ultimate origin" of a decl. The decl may be an inlined | |
3837 | instance of an inlined instance of a decl which is local to an inline | |
3838 | function, so we have to trace all of the way back through the origin chain | |
3839 | to find out what sort of node actually served as the original seed for the | |
3840 | given block. */ | |
a3f97cbb | 3841 | |
3f76745e JM |
3842 | static tree |
3843 | decl_ultimate_origin (decl) | |
3844 | register tree decl; | |
a3f97cbb | 3845 | { |
10a11b75 JM |
3846 | /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the |
3847 | nodes in the function to point to themselves; ignore that if | |
3848 | we're trying to output the abstract instance of this function. */ | |
3849 | if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl) | |
3850 | return NULL_TREE; | |
3851 | ||
556273e0 | 3852 | #ifdef ENABLE_CHECKING |
02e24c7a MM |
3853 | if (DECL_FROM_INLINE (DECL_ORIGIN (decl))) |
3854 | /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the | |
3855 | most distant ancestor, this should never happen. */ | |
3856 | abort (); | |
3857 | #endif | |
3f76745e | 3858 | |
02e24c7a | 3859 | return DECL_ABSTRACT_ORIGIN (decl); |
a3f97cbb JW |
3860 | } |
3861 | ||
3f76745e JM |
3862 | /* Determine the "ultimate origin" of a block. The block may be an inlined |
3863 | instance of an inlined instance of a block which is local to an inline | |
3864 | function, so we have to trace all of the way back through the origin chain | |
3865 | to find out what sort of node actually served as the original seed for the | |
3866 | given block. */ | |
71dfc51f | 3867 | |
3f76745e JM |
3868 | static tree |
3869 | block_ultimate_origin (block) | |
3870 | register tree block; | |
a3f97cbb | 3871 | { |
3f76745e | 3872 | register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block); |
71dfc51f | 3873 | |
10a11b75 JM |
3874 | /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the |
3875 | nodes in the function to point to themselves; ignore that if | |
3876 | we're trying to output the abstract instance of this function. */ | |
3877 | if (BLOCK_ABSTRACT (block) && immediate_origin == block) | |
3878 | return NULL_TREE; | |
3879 | ||
3f76745e JM |
3880 | if (immediate_origin == NULL_TREE) |
3881 | return NULL_TREE; | |
3882 | else | |
3883 | { | |
3884 | register tree ret_val; | |
3885 | register tree lookahead = immediate_origin; | |
71dfc51f | 3886 | |
3f76745e JM |
3887 | do |
3888 | { | |
3889 | ret_val = lookahead; | |
3890 | lookahead = (TREE_CODE (ret_val) == BLOCK) | |
3891 | ? BLOCK_ABSTRACT_ORIGIN (ret_val) | |
3892 | : NULL; | |
3893 | } | |
3894 | while (lookahead != NULL && lookahead != ret_val); | |
3895 | ||
3896 | return ret_val; | |
3897 | } | |
a3f97cbb JW |
3898 | } |
3899 | ||
3f76745e JM |
3900 | /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT |
3901 | of a virtual function may refer to a base class, so we check the 'this' | |
3902 | parameter. */ | |
71dfc51f | 3903 | |
3f76745e JM |
3904 | static tree |
3905 | decl_class_context (decl) | |
3906 | tree decl; | |
a3f97cbb | 3907 | { |
3f76745e | 3908 | tree context = NULL_TREE; |
71dfc51f | 3909 | |
3f76745e JM |
3910 | if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl)) |
3911 | context = DECL_CONTEXT (decl); | |
3912 | else | |
3913 | context = TYPE_MAIN_VARIANT | |
3914 | (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))))); | |
71dfc51f | 3915 | |
2f939d94 | 3916 | if (context && !TYPE_P (context)) |
3f76745e JM |
3917 | context = NULL_TREE; |
3918 | ||
3919 | return context; | |
a3f97cbb JW |
3920 | } |
3921 | \f | |
a96c67ec | 3922 | /* Add an attribute/value pair to a DIE. We build the lists up in reverse |
881c6935 | 3923 | addition order, and correct that in reverse_all_dies. */ |
71dfc51f RK |
3924 | |
3925 | static inline void | |
3f76745e JM |
3926 | add_dwarf_attr (die, attr) |
3927 | register dw_die_ref die; | |
3928 | register dw_attr_ref attr; | |
a3f97cbb | 3929 | { |
3f76745e | 3930 | if (die != NULL && attr != NULL) |
a3f97cbb | 3931 | { |
a96c67ec JM |
3932 | attr->dw_attr_next = die->die_attr; |
3933 | die->die_attr = attr; | |
a3f97cbb JW |
3934 | } |
3935 | } | |
3936 | ||
c6991660 | 3937 | static inline dw_val_class AT_class PARAMS ((dw_attr_ref)); |
a96c67ec JM |
3938 | static inline dw_val_class |
3939 | AT_class (a) | |
3940 | dw_attr_ref a; | |
3941 | { | |
3942 | return a->dw_attr_val.val_class; | |
3943 | } | |
3944 | ||
3f76745e | 3945 | /* Add a flag value attribute to a DIE. */ |
71dfc51f | 3946 | |
3f76745e JM |
3947 | static inline void |
3948 | add_AT_flag (die, attr_kind, flag) | |
3949 | register dw_die_ref die; | |
3950 | register enum dwarf_attribute attr_kind; | |
3951 | register unsigned flag; | |
a3f97cbb | 3952 | { |
3f76745e | 3953 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
71dfc51f | 3954 | |
3f76745e JM |
3955 | attr->dw_attr_next = NULL; |
3956 | attr->dw_attr = attr_kind; | |
3957 | attr->dw_attr_val.val_class = dw_val_class_flag; | |
3958 | attr->dw_attr_val.v.val_flag = flag; | |
3959 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
3960 | } |
3961 | ||
c6991660 | 3962 | static inline unsigned AT_flag PARAMS ((dw_attr_ref)); |
a96c67ec JM |
3963 | static inline unsigned |
3964 | AT_flag (a) | |
3965 | register dw_attr_ref a; | |
3966 | { | |
3967 | if (a && AT_class (a) == dw_val_class_flag) | |
3968 | return a->dw_attr_val.v.val_flag; | |
3969 | ||
40e8cc95 | 3970 | abort (); |
a96c67ec JM |
3971 | } |
3972 | ||
3f76745e | 3973 | /* Add a signed integer attribute value to a DIE. */ |
71dfc51f | 3974 | |
3f76745e JM |
3975 | static inline void |
3976 | add_AT_int (die, attr_kind, int_val) | |
3977 | register dw_die_ref die; | |
3978 | register enum dwarf_attribute attr_kind; | |
3979 | register long int int_val; | |
a3f97cbb | 3980 | { |
3f76745e JM |
3981 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
3982 | ||
3983 | attr->dw_attr_next = NULL; | |
3984 | attr->dw_attr = attr_kind; | |
3985 | attr->dw_attr_val.val_class = dw_val_class_const; | |
3986 | attr->dw_attr_val.v.val_int = int_val; | |
3987 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
3988 | } |
3989 | ||
c6991660 | 3990 | static inline long int AT_int PARAMS ((dw_attr_ref)); |
a96c67ec JM |
3991 | static inline long int |
3992 | AT_int (a) | |
3993 | register dw_attr_ref a; | |
3994 | { | |
3995 | if (a && AT_class (a) == dw_val_class_const) | |
3996 | return a->dw_attr_val.v.val_int; | |
3997 | ||
40e8cc95 | 3998 | abort (); |
a96c67ec JM |
3999 | } |
4000 | ||
3f76745e | 4001 | /* Add an unsigned integer attribute value to a DIE. */ |
71dfc51f | 4002 | |
3f76745e JM |
4003 | static inline void |
4004 | add_AT_unsigned (die, attr_kind, unsigned_val) | |
4005 | register dw_die_ref die; | |
4006 | register enum dwarf_attribute attr_kind; | |
4007 | register unsigned long unsigned_val; | |
a3f97cbb | 4008 | { |
3f76745e JM |
4009 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
4010 | ||
4011 | attr->dw_attr_next = NULL; | |
4012 | attr->dw_attr = attr_kind; | |
4013 | attr->dw_attr_val.val_class = dw_val_class_unsigned_const; | |
4014 | attr->dw_attr_val.v.val_unsigned = unsigned_val; | |
4015 | add_dwarf_attr (die, attr); | |
a3f97cbb | 4016 | } |
71dfc51f | 4017 | |
c6991660 | 4018 | static inline unsigned long AT_unsigned PARAMS ((dw_attr_ref)); |
a96c67ec JM |
4019 | static inline unsigned long |
4020 | AT_unsigned (a) | |
4021 | register dw_attr_ref a; | |
4022 | { | |
4023 | if (a && AT_class (a) == dw_val_class_unsigned_const) | |
4024 | return a->dw_attr_val.v.val_unsigned; | |
4025 | ||
40e8cc95 | 4026 | abort (); |
a96c67ec JM |
4027 | } |
4028 | ||
3f76745e JM |
4029 | /* Add an unsigned double integer attribute value to a DIE. */ |
4030 | ||
4031 | static inline void | |
4032 | add_AT_long_long (die, attr_kind, val_hi, val_low) | |
a3f97cbb | 4033 | register dw_die_ref die; |
3f76745e JM |
4034 | register enum dwarf_attribute attr_kind; |
4035 | register unsigned long val_hi; | |
4036 | register unsigned long val_low; | |
a3f97cbb | 4037 | { |
3f76745e | 4038 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
71dfc51f | 4039 | |
3f76745e JM |
4040 | attr->dw_attr_next = NULL; |
4041 | attr->dw_attr = attr_kind; | |
4042 | attr->dw_attr_val.val_class = dw_val_class_long_long; | |
4043 | attr->dw_attr_val.v.val_long_long.hi = val_hi; | |
4044 | attr->dw_attr_val.v.val_long_long.low = val_low; | |
4045 | add_dwarf_attr (die, attr); | |
4046 | } | |
71dfc51f | 4047 | |
3f76745e | 4048 | /* Add a floating point attribute value to a DIE and return it. */ |
71dfc51f | 4049 | |
3f76745e JM |
4050 | static inline void |
4051 | add_AT_float (die, attr_kind, length, array) | |
4052 | register dw_die_ref die; | |
4053 | register enum dwarf_attribute attr_kind; | |
4054 | register unsigned length; | |
4055 | register long *array; | |
4056 | { | |
4057 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); | |
4058 | ||
4059 | attr->dw_attr_next = NULL; | |
4060 | attr->dw_attr = attr_kind; | |
4061 | attr->dw_attr_val.val_class = dw_val_class_float; | |
4062 | attr->dw_attr_val.v.val_float.length = length; | |
4063 | attr->dw_attr_val.v.val_float.array = array; | |
4064 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4065 | } |
4066 | ||
3f76745e | 4067 | /* Add a string attribute value to a DIE. */ |
71dfc51f | 4068 | |
3f76745e JM |
4069 | static inline void |
4070 | add_AT_string (die, attr_kind, str) | |
a3f97cbb | 4071 | register dw_die_ref die; |
3f76745e | 4072 | register enum dwarf_attribute attr_kind; |
d560ee52 | 4073 | register const char *str; |
a3f97cbb | 4074 | { |
3f76745e | 4075 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
71dfc51f | 4076 | |
3f76745e JM |
4077 | attr->dw_attr_next = NULL; |
4078 | attr->dw_attr = attr_kind; | |
4079 | attr->dw_attr_val.val_class = dw_val_class_str; | |
4080 | attr->dw_attr_val.v.val_str = xstrdup (str); | |
4081 | add_dwarf_attr (die, attr); | |
4082 | } | |
71dfc51f | 4083 | |
c6991660 | 4084 | static inline const char *AT_string PARAMS ((dw_attr_ref)); |
a96c67ec JM |
4085 | static inline const char * |
4086 | AT_string (a) | |
4087 | register dw_attr_ref a; | |
4088 | { | |
4089 | if (a && AT_class (a) == dw_val_class_str) | |
4090 | return a->dw_attr_val.v.val_str; | |
4091 | ||
40e8cc95 | 4092 | abort (); |
a96c67ec JM |
4093 | } |
4094 | ||
3f76745e | 4095 | /* Add a DIE reference attribute value to a DIE. */ |
71dfc51f | 4096 | |
3f76745e JM |
4097 | static inline void |
4098 | add_AT_die_ref (die, attr_kind, targ_die) | |
4099 | register dw_die_ref die; | |
4100 | register enum dwarf_attribute attr_kind; | |
4101 | register dw_die_ref targ_die; | |
4102 | { | |
4103 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); | |
71dfc51f | 4104 | |
3f76745e JM |
4105 | attr->dw_attr_next = NULL; |
4106 | attr->dw_attr = attr_kind; | |
4107 | attr->dw_attr_val.val_class = dw_val_class_die_ref; | |
881c6935 JM |
4108 | attr->dw_attr_val.v.val_die_ref.die = targ_die; |
4109 | attr->dw_attr_val.v.val_die_ref.external = 0; | |
3f76745e JM |
4110 | add_dwarf_attr (die, attr); |
4111 | } | |
b1ccbc24 | 4112 | |
c6991660 | 4113 | static inline dw_die_ref AT_ref PARAMS ((dw_attr_ref)); |
a96c67ec JM |
4114 | static inline dw_die_ref |
4115 | AT_ref (a) | |
4116 | register dw_attr_ref a; | |
4117 | { | |
4118 | if (a && AT_class (a) == dw_val_class_die_ref) | |
881c6935 | 4119 | return a->dw_attr_val.v.val_die_ref.die; |
a96c67ec | 4120 | |
40e8cc95 | 4121 | abort (); |
a96c67ec JM |
4122 | } |
4123 | ||
881c6935 JM |
4124 | static inline int AT_ref_external PARAMS ((dw_attr_ref)); |
4125 | static inline int | |
4126 | AT_ref_external (a) | |
4127 | register dw_attr_ref a; | |
4128 | { | |
4129 | if (a && AT_class (a) == dw_val_class_die_ref) | |
4130 | return a->dw_attr_val.v.val_die_ref.external; | |
4131 | ||
4132 | return 0; | |
4133 | } | |
4134 | ||
4135 | static inline void set_AT_ref_external PARAMS ((dw_attr_ref, int)); | |
4136 | static inline void | |
4137 | set_AT_ref_external (a, i) | |
4138 | register dw_attr_ref a; | |
4139 | int i; | |
4140 | { | |
4141 | if (a && AT_class (a) == dw_val_class_die_ref) | |
4142 | a->dw_attr_val.v.val_die_ref.external = i; | |
4143 | else | |
4144 | abort (); | |
4145 | } | |
4146 | ||
3f76745e | 4147 | /* Add an FDE reference attribute value to a DIE. */ |
b1ccbc24 | 4148 | |
3f76745e JM |
4149 | static inline void |
4150 | add_AT_fde_ref (die, attr_kind, targ_fde) | |
4151 | register dw_die_ref die; | |
4152 | register enum dwarf_attribute attr_kind; | |
4153 | register unsigned targ_fde; | |
4154 | { | |
4155 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); | |
b1ccbc24 | 4156 | |
3f76745e JM |
4157 | attr->dw_attr_next = NULL; |
4158 | attr->dw_attr = attr_kind; | |
4159 | attr->dw_attr_val.val_class = dw_val_class_fde_ref; | |
4160 | attr->dw_attr_val.v.val_fde_index = targ_fde; | |
4161 | add_dwarf_attr (die, attr); | |
a3f97cbb | 4162 | } |
71dfc51f | 4163 | |
3f76745e | 4164 | /* Add a location description attribute value to a DIE. */ |
71dfc51f | 4165 | |
3f76745e JM |
4166 | static inline void |
4167 | add_AT_loc (die, attr_kind, loc) | |
4168 | register dw_die_ref die; | |
4169 | register enum dwarf_attribute attr_kind; | |
4170 | register dw_loc_descr_ref loc; | |
4171 | { | |
4172 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); | |
71dfc51f | 4173 | |
3f76745e JM |
4174 | attr->dw_attr_next = NULL; |
4175 | attr->dw_attr = attr_kind; | |
4176 | attr->dw_attr_val.val_class = dw_val_class_loc; | |
4177 | attr->dw_attr_val.v.val_loc = loc; | |
4178 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4179 | } |
4180 | ||
c6991660 | 4181 | static inline dw_loc_descr_ref AT_loc PARAMS ((dw_attr_ref)); |
a96c67ec JM |
4182 | static inline dw_loc_descr_ref |
4183 | AT_loc (a) | |
4184 | register dw_attr_ref a; | |
4185 | { | |
4186 | if (a && AT_class (a) == dw_val_class_loc) | |
4187 | return a->dw_attr_val.v.val_loc; | |
4188 | ||
40e8cc95 | 4189 | abort (); |
a96c67ec JM |
4190 | } |
4191 | ||
3f76745e | 4192 | /* Add an address constant attribute value to a DIE. */ |
71dfc51f | 4193 | |
3f76745e JM |
4194 | static inline void |
4195 | add_AT_addr (die, attr_kind, addr) | |
4196 | register dw_die_ref die; | |
4197 | register enum dwarf_attribute attr_kind; | |
1865dbb5 | 4198 | rtx addr; |
a3f97cbb | 4199 | { |
3f76745e | 4200 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
71dfc51f | 4201 | |
3f76745e JM |
4202 | attr->dw_attr_next = NULL; |
4203 | attr->dw_attr = attr_kind; | |
4204 | attr->dw_attr_val.val_class = dw_val_class_addr; | |
4205 | attr->dw_attr_val.v.val_addr = addr; | |
4206 | add_dwarf_attr (die, attr); | |
a3f97cbb JW |
4207 | } |
4208 | ||
c6991660 | 4209 | static inline rtx AT_addr PARAMS ((dw_attr_ref)); |
1865dbb5 | 4210 | static inline rtx |
a96c67ec JM |
4211 | AT_addr (a) |
4212 | register dw_attr_ref a; | |
4213 | { | |
4214 | if (a && AT_class (a) == dw_val_class_addr) | |
4215 | return a->dw_attr_val.v.val_addr; | |
4216 | ||
40e8cc95 | 4217 | abort (); |
a96c67ec JM |
4218 | } |
4219 | ||
3f76745e | 4220 | /* Add a label identifier attribute value to a DIE. */ |
71dfc51f | 4221 | |
3f76745e JM |
4222 | static inline void |
4223 | add_AT_lbl_id (die, attr_kind, lbl_id) | |
4224 | register dw_die_ref die; | |
4225 | register enum dwarf_attribute attr_kind; | |
d3e3972c | 4226 | register const char *lbl_id; |
a3f97cbb | 4227 | { |
3f76745e | 4228 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); |
71dfc51f | 4229 | |
3f76745e JM |
4230 | attr->dw_attr_next = NULL; |
4231 | attr->dw_attr = attr_kind; | |
4232 | attr->dw_attr_val.val_class = dw_val_class_lbl_id; | |
4233 | attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id); | |
4234 | add_dwarf_attr (die, attr); | |
4235 | } | |
71dfc51f | 4236 | |
3f76745e JM |
4237 | /* Add a section offset attribute value to a DIE. */ |
4238 | ||
4239 | static inline void | |
8b790721 | 4240 | add_AT_lbl_offset (die, attr_kind, label) |
3f76745e JM |
4241 | register dw_die_ref die; |
4242 | register enum dwarf_attribute attr_kind; | |
d3e3972c | 4243 | register const char *label; |
3f76745e JM |
4244 | { |
4245 | register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node)); | |
71dfc51f | 4246 | |
3f76745e JM |
4247 | attr->dw_attr_next = NULL; |
4248 | attr->dw_attr = attr_kind; | |
8b790721 | 4249 | attr->dw_attr_val.val_class = dw_val_class_lbl_offset; |
a96c67ec | 4250 | attr->dw_attr_val.v.val_lbl_id = xstrdup (label); |
3f76745e | 4251 | add_dwarf_attr (die, attr); |
a3f97cbb JW |
4252 | } |
4253 | ||
c6991660 | 4254 | static inline const char *AT_lbl PARAMS ((dw_attr_ref)); |
a96c67ec JM |
4255 | static inline const char * |
4256 | AT_lbl (a) | |
4257 | register dw_attr_ref a; | |
a3f97cbb | 4258 | { |
a96c67ec JM |
4259 | if (a && (AT_class (a) == dw_val_class_lbl_id |
4260 | || AT_class (a) == dw_val_class_lbl_offset)) | |
4261 | return a->dw_attr_val.v.val_lbl_id; | |
71dfc51f | 4262 | |
40e8cc95 | 4263 | abort (); |
a3f97cbb JW |
4264 | } |
4265 | ||
3f76745e | 4266 | /* Get the attribute of type attr_kind. */ |
71dfc51f | 4267 | |
3f76745e JM |
4268 | static inline dw_attr_ref |
4269 | get_AT (die, attr_kind) | |
4270 | register dw_die_ref die; | |
4271 | register enum dwarf_attribute attr_kind; | |
f37230f0 | 4272 | { |
3f76745e JM |
4273 | register dw_attr_ref a; |
4274 | register dw_die_ref spec = NULL; | |
556273e0 | 4275 | |
3f76745e JM |
4276 | if (die != NULL) |
4277 | { | |
4278 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) | |
4279 | { | |
4280 | if (a->dw_attr == attr_kind) | |
4281 | return a; | |
71dfc51f | 4282 | |
3f76745e JM |
4283 | if (a->dw_attr == DW_AT_specification |
4284 | || a->dw_attr == DW_AT_abstract_origin) | |
a96c67ec | 4285 | spec = AT_ref (a); |
3f76745e | 4286 | } |
71dfc51f | 4287 | |
3f76745e JM |
4288 | if (spec) |
4289 | return get_AT (spec, attr_kind); | |
4290 | } | |
4291 | ||
4292 | return NULL; | |
f37230f0 JM |
4293 | } |
4294 | ||
3f76745e JM |
4295 | /* Return the "low pc" attribute value, typically associated with |
4296 | a subprogram DIE. Return null if the "low pc" attribute is | |
4297 | either not prsent, or if it cannot be represented as an | |
4298 | assembler label identifier. */ | |
71dfc51f | 4299 | |
a96c67ec | 4300 | static inline const char * |
3f76745e JM |
4301 | get_AT_low_pc (die) |
4302 | register dw_die_ref die; | |
7e23cb16 | 4303 | { |
3f76745e | 4304 | register dw_attr_ref a = get_AT (die, DW_AT_low_pc); |
40e8cc95 | 4305 | return a ? AT_lbl (a) : NULL; |
7e23cb16 JM |
4306 | } |
4307 | ||
3f76745e JM |
4308 | /* Return the "high pc" attribute value, typically associated with |
4309 | a subprogram DIE. Return null if the "high pc" attribute is | |
4310 | either not prsent, or if it cannot be represented as an | |
4311 | assembler label identifier. */ | |
71dfc51f | 4312 | |
a96c67ec | 4313 | static inline const char * |
3f76745e | 4314 | get_AT_hi_pc (die) |
a3f97cbb JW |
4315 | register dw_die_ref die; |
4316 | { | |
3f76745e | 4317 | register dw_attr_ref a = get_AT (die, DW_AT_high_pc); |
40e8cc95 | 4318 | return a ? AT_lbl (a) : NULL; |
3f76745e JM |
4319 | } |
4320 | ||
4321 | /* Return the value of the string attribute designated by ATTR_KIND, or | |
4322 | NULL if it is not present. */ | |
71dfc51f | 4323 | |
a96c67ec | 4324 | static inline const char * |
3f76745e JM |
4325 | get_AT_string (die, attr_kind) |
4326 | register dw_die_ref die; | |
4327 | register enum dwarf_attribute attr_kind; | |
4328 | { | |
4329 | register dw_attr_ref a = get_AT (die, attr_kind); | |
40e8cc95 | 4330 | return a ? AT_string (a) : NULL; |
a3f97cbb JW |
4331 | } |
4332 | ||
3f76745e JM |
4333 | /* Return the value of the flag attribute designated by ATTR_KIND, or -1 |
4334 | if it is not present. */ | |
71dfc51f | 4335 | |
3f76745e JM |
4336 | static inline int |
4337 | get_AT_flag (die, attr_kind) | |
4338 | register dw_die_ref die; | |
4339 | register enum dwarf_attribute attr_kind; | |
a3f97cbb | 4340 | { |
3f76745e | 4341 | register dw_attr_ref a = get_AT (die, attr_kind); |
40e8cc95 | 4342 | return a ? AT_flag (a) : 0; |
a3f97cbb JW |
4343 | } |
4344 | ||
3f76745e JM |
4345 | /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0 |
4346 | if it is not present. */ | |
71dfc51f | 4347 | |
3f76745e JM |
4348 | static inline unsigned |
4349 | get_AT_unsigned (die, attr_kind) | |
4350 | register dw_die_ref die; | |
4351 | register enum dwarf_attribute attr_kind; | |
a3f97cbb | 4352 | { |
3f76745e | 4353 | register dw_attr_ref a = get_AT (die, attr_kind); |
40e8cc95 | 4354 | return a ? AT_unsigned (a) : 0; |
a96c67ec | 4355 | } |
71dfc51f | 4356 | |
a96c67ec JM |
4357 | static inline dw_die_ref |
4358 | get_AT_ref (die, attr_kind) | |
4359 | dw_die_ref die; | |
4360 | register enum dwarf_attribute attr_kind; | |
4361 | { | |
4362 | register dw_attr_ref a = get_AT (die, attr_kind); | |
40e8cc95 | 4363 | return a ? AT_ref (a) : NULL; |
3f76745e | 4364 | } |
71dfc51f | 4365 | |
3f76745e JM |
4366 | static inline int |
4367 | is_c_family () | |
4368 | { | |
4369 | register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language); | |
71dfc51f | 4370 | |
3f76745e JM |
4371 | return (lang == DW_LANG_C || lang == DW_LANG_C89 |
4372 | || lang == DW_LANG_C_plus_plus); | |
556273e0 | 4373 | } |
71dfc51f | 4374 | |
3f76745e JM |
4375 | static inline int |
4376 | is_fortran () | |
4377 | { | |
4378 | register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language); | |
71dfc51f | 4379 | |
3f76745e | 4380 | return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90); |
556273e0 | 4381 | } |
71dfc51f | 4382 | |
28985b81 AG |
4383 | static inline int |
4384 | is_java () | |
4385 | { | |
4386 | register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language); | |
4387 | ||
4388 | return (lang == DW_LANG_Java); | |
4389 | } | |
4390 | ||
10a11b75 | 4391 | /* Free up the memory used by A. */ |
71dfc51f | 4392 | |
c6991660 | 4393 | static inline void free_AT PARAMS ((dw_attr_ref)); |
3f76745e | 4394 | static inline void |
10a11b75 JM |
4395 | free_AT (a) |
4396 | dw_attr_ref a; | |
4397 | { | |
4398 | switch (AT_class (a)) | |
4399 | { | |
10a11b75 JM |
4400 | case dw_val_class_str: |
4401 | case dw_val_class_lbl_id: | |
4402 | case dw_val_class_lbl_offset: | |
4403 | free (a->dw_attr_val.v.val_str); | |
4404 | break; | |
4405 | ||
3724ec07 WC |
4406 | case dw_val_class_float: |
4407 | free (a->dw_attr_val.v.val_float.array); | |
4408 | break; | |
0b34cf1e | 4409 | |
10a11b75 JM |
4410 | default: |
4411 | break; | |
4412 | } | |
4413 | ||
4414 | free (a); | |
556273e0 | 4415 | } |
10a11b75 JM |
4416 | |
4417 | /* Remove the specified attribute if present. */ | |
4418 | ||
4419 | static void | |
3f76745e JM |
4420 | remove_AT (die, attr_kind) |
4421 | register dw_die_ref die; | |
4422 | register enum dwarf_attribute attr_kind; | |
4423 | { | |
a96c67ec | 4424 | register dw_attr_ref *p; |
6d649d26 | 4425 | register dw_attr_ref removed = NULL; |
a3f97cbb | 4426 | |
3f76745e JM |
4427 | if (die != NULL) |
4428 | { | |
a96c67ec JM |
4429 | for (p = &(die->die_attr); *p; p = &((*p)->dw_attr_next)) |
4430 | if ((*p)->dw_attr == attr_kind) | |
4431 | { | |
4432 | removed = *p; | |
4433 | *p = (*p)->dw_attr_next; | |
4434 | break; | |
4435 | } | |
71dfc51f | 4436 | |
a96c67ec | 4437 | if (removed != 0) |
10a11b75 JM |
4438 | free_AT (removed); |
4439 | } | |
4440 | } | |
71dfc51f | 4441 | |
10a11b75 | 4442 | /* Free up the memory used by DIE. */ |
71dfc51f | 4443 | |
c6991660 | 4444 | static inline void free_die PARAMS ((dw_die_ref)); |
10a11b75 JM |
4445 | static inline void |
4446 | free_die (die) | |
4447 | dw_die_ref die; | |
4448 | { | |
4449 | remove_children (die); | |
4450 | free (die); | |
3f76745e | 4451 | } |
71dfc51f | 4452 | |
3f76745e | 4453 | /* Discard the children of this DIE. */ |
71dfc51f | 4454 | |
10a11b75 | 4455 | static void |
3f76745e JM |
4456 | remove_children (die) |
4457 | register dw_die_ref die; | |
4458 | { | |
4459 | register dw_die_ref child_die = die->die_child; | |
4460 | ||
4461 | die->die_child = NULL; | |
3f76745e JM |
4462 | |
4463 | while (child_die != NULL) | |
a3f97cbb | 4464 | { |
3f76745e JM |
4465 | register dw_die_ref tmp_die = child_die; |
4466 | register dw_attr_ref a; | |
71dfc51f | 4467 | |
3f76745e | 4468 | child_die = child_die->die_sib; |
556273e0 KH |
4469 | |
4470 | for (a = tmp_die->die_attr; a != NULL;) | |
a3f97cbb | 4471 | { |
3f76745e | 4472 | register dw_attr_ref tmp_a = a; |
71dfc51f | 4473 | |
3f76745e | 4474 | a = a->dw_attr_next; |
10a11b75 | 4475 | free_AT (tmp_a); |
a3f97cbb | 4476 | } |
71dfc51f | 4477 | |
10a11b75 | 4478 | free_die (tmp_die); |
3f76745e JM |
4479 | } |
4480 | } | |
71dfc51f | 4481 | |
a96c67ec | 4482 | /* Add a child DIE below its parent. We build the lists up in reverse |
881c6935 | 4483 | addition order, and correct that in reverse_all_dies. */ |
71dfc51f | 4484 | |
3f76745e JM |
4485 | static inline void |
4486 | add_child_die (die, child_die) | |
4487 | register dw_die_ref die; | |
4488 | register dw_die_ref child_die; | |
4489 | { | |
4490 | if (die != NULL && child_die != NULL) | |
e90b62db | 4491 | { |
3a88cbd1 JL |
4492 | if (die == child_die) |
4493 | abort (); | |
3f76745e | 4494 | child_die->die_parent = die; |
a96c67ec JM |
4495 | child_die->die_sib = die->die_child; |
4496 | die->die_child = child_die; | |
3f76745e JM |
4497 | } |
4498 | } | |
4499 | ||
2081603c JM |
4500 | /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT |
4501 | is the specification, to the front of PARENT's list of children. */ | |
10a11b75 JM |
4502 | |
4503 | static void | |
4504 | splice_child_die (parent, child) | |
4505 | dw_die_ref parent, child; | |
4506 | { | |
4507 | dw_die_ref *p; | |
4508 | ||
4509 | /* We want the declaration DIE from inside the class, not the | |
4510 | specification DIE at toplevel. */ | |
4511 | if (child->die_parent != parent) | |
2081603c JM |
4512 | { |
4513 | dw_die_ref tmp = get_AT_ref (child, DW_AT_specification); | |
4514 | if (tmp) | |
4515 | child = tmp; | |
4516 | } | |
10a11b75 | 4517 | |
2081603c JM |
4518 | if (child->die_parent != parent |
4519 | && child->die_parent != get_AT_ref (parent, DW_AT_specification)) | |
10a11b75 JM |
4520 | abort (); |
4521 | ||
5de0e8d4 | 4522 | for (p = &(child->die_parent->die_child); *p; p = &((*p)->die_sib)) |
10a11b75 JM |
4523 | if (*p == child) |
4524 | { | |
4525 | *p = child->die_sib; | |
4526 | break; | |
4527 | } | |
4528 | ||
4529 | child->die_sib = parent->die_child; | |
4530 | parent->die_child = child; | |
4531 | } | |
4532 | ||
3f76745e JM |
4533 | /* Return a pointer to a newly created DIE node. */ |
4534 | ||
4535 | static inline dw_die_ref | |
4536 | new_die (tag_value, parent_die) | |
4537 | register enum dwarf_tag tag_value; | |
4538 | register dw_die_ref parent_die; | |
4539 | { | |
3f4907a6 | 4540 | register dw_die_ref die = (dw_die_ref) xcalloc (1, sizeof (die_node)); |
3f76745e JM |
4541 | |
4542 | die->die_tag = tag_value; | |
3f76745e JM |
4543 | |
4544 | if (parent_die != NULL) | |
4545 | add_child_die (parent_die, die); | |
4546 | else | |
ef76d03b JW |
4547 | { |
4548 | limbo_die_node *limbo_node; | |
4549 | ||
4550 | limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node)); | |
4551 | limbo_node->die = die; | |
4552 | limbo_node->next = limbo_die_list; | |
4553 | limbo_die_list = limbo_node; | |
4554 | } | |
71dfc51f | 4555 | |
3f76745e JM |
4556 | return die; |
4557 | } | |
71dfc51f | 4558 | |
3f76745e | 4559 | /* Return the DIE associated with the given type specifier. */ |
71dfc51f | 4560 | |
3f76745e JM |
4561 | static inline dw_die_ref |
4562 | lookup_type_die (type) | |
4563 | register tree type; | |
4564 | { | |
4061f623 BS |
4565 | if (TREE_CODE (type) == VECTOR_TYPE) |
4566 | type = TYPE_DEBUG_REPRESENTATION_TYPE (type); | |
3f76745e JM |
4567 | return (dw_die_ref) TYPE_SYMTAB_POINTER (type); |
4568 | } | |
e90b62db | 4569 | |
3f76745e | 4570 | /* Equate a DIE to a given type specifier. */ |
71dfc51f | 4571 | |
10a11b75 | 4572 | static inline void |
3f76745e JM |
4573 | equate_type_number_to_die (type, type_die) |
4574 | register tree type; | |
4575 | register dw_die_ref type_die; | |
4576 | { | |
4577 | TYPE_SYMTAB_POINTER (type) = (char *) type_die; | |
4578 | } | |
71dfc51f | 4579 | |
3f76745e | 4580 | /* Return the DIE associated with a given declaration. */ |
71dfc51f | 4581 | |
3f76745e JM |
4582 | static inline dw_die_ref |
4583 | lookup_decl_die (decl) | |
4584 | register tree decl; | |
4585 | { | |
4586 | register unsigned decl_id = DECL_UID (decl); | |
4587 | ||
4588 | return (decl_id < decl_die_table_in_use | |
4589 | ? decl_die_table[decl_id] : NULL); | |
a3f97cbb JW |
4590 | } |
4591 | ||
3f76745e | 4592 | /* Equate a DIE to a particular declaration. */ |
71dfc51f | 4593 | |
3f76745e JM |
4594 | static void |
4595 | equate_decl_number_to_die (decl, decl_die) | |
4596 | register tree decl; | |
4597 | register dw_die_ref decl_die; | |
a3f97cbb | 4598 | { |
3f76745e | 4599 | register unsigned decl_id = DECL_UID (decl); |
3f76745e | 4600 | register unsigned num_allocated; |
d291dd49 | 4601 | |
3f76745e | 4602 | if (decl_id >= decl_die_table_allocated) |
a3f97cbb | 4603 | { |
3f76745e JM |
4604 | num_allocated |
4605 | = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1) | |
4606 | / DECL_DIE_TABLE_INCREMENT) | |
4607 | * DECL_DIE_TABLE_INCREMENT; | |
4608 | ||
4609 | decl_die_table | |
4610 | = (dw_die_ref *) xrealloc (decl_die_table, | |
4611 | sizeof (dw_die_ref) * num_allocated); | |
4612 | ||
961192e1 | 4613 | memset ((char *) &decl_die_table[decl_die_table_allocated], 0, |
3f76745e JM |
4614 | (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref)); |
4615 | decl_die_table_allocated = num_allocated; | |
a3f97cbb | 4616 | } |
71dfc51f | 4617 | |
3f76745e JM |
4618 | if (decl_id >= decl_die_table_in_use) |
4619 | decl_die_table_in_use = (decl_id + 1); | |
4620 | ||
4621 | decl_die_table[decl_id] = decl_die; | |
a3f97cbb | 4622 | } |
3f76745e JM |
4623 | \f |
4624 | /* Keep track of the number of spaces used to indent the | |
4625 | output of the debugging routines that print the structure of | |
4626 | the DIE internal representation. */ | |
4627 | static int print_indent; | |
71dfc51f | 4628 | |
3f76745e JM |
4629 | /* Indent the line the number of spaces given by print_indent. */ |
4630 | ||
4631 | static inline void | |
4632 | print_spaces (outfile) | |
4633 | FILE *outfile; | |
4634 | { | |
4635 | fprintf (outfile, "%*s", print_indent, ""); | |
a3f97cbb JW |
4636 | } |
4637 | ||
956d6950 | 4638 | /* Print the information associated with a given DIE, and its children. |
3f76745e | 4639 | This routine is a debugging aid only. */ |
71dfc51f | 4640 | |
a3f97cbb | 4641 | static void |
3f76745e JM |
4642 | print_die (die, outfile) |
4643 | dw_die_ref die; | |
4644 | FILE *outfile; | |
a3f97cbb | 4645 | { |
3f76745e JM |
4646 | register dw_attr_ref a; |
4647 | register dw_die_ref c; | |
71dfc51f | 4648 | |
3f76745e | 4649 | print_spaces (outfile); |
2d8b0f3a | 4650 | fprintf (outfile, "DIE %4lu: %s\n", |
3f76745e JM |
4651 | die->die_offset, dwarf_tag_name (die->die_tag)); |
4652 | print_spaces (outfile); | |
2d8b0f3a JL |
4653 | fprintf (outfile, " abbrev id: %lu", die->die_abbrev); |
4654 | fprintf (outfile, " offset: %lu\n", die->die_offset); | |
3f76745e JM |
4655 | |
4656 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) | |
a3f97cbb | 4657 | { |
3f76745e JM |
4658 | print_spaces (outfile); |
4659 | fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr)); | |
4660 | ||
a96c67ec | 4661 | switch (AT_class (a)) |
3f76745e JM |
4662 | { |
4663 | case dw_val_class_addr: | |
4664 | fprintf (outfile, "address"); | |
4665 | break; | |
4666 | case dw_val_class_loc: | |
4667 | fprintf (outfile, "location descriptor"); | |
4668 | break; | |
4669 | case dw_val_class_const: | |
a96c67ec | 4670 | fprintf (outfile, "%ld", AT_int (a)); |
3f76745e JM |
4671 | break; |
4672 | case dw_val_class_unsigned_const: | |
a96c67ec | 4673 | fprintf (outfile, "%lu", AT_unsigned (a)); |
3f76745e JM |
4674 | break; |
4675 | case dw_val_class_long_long: | |
2d8b0f3a | 4676 | fprintf (outfile, "constant (%lu,%lu)", |
556273e0 KH |
4677 | a->dw_attr_val.v.val_long_long.hi, |
4678 | a->dw_attr_val.v.val_long_long.low); | |
3f76745e JM |
4679 | break; |
4680 | case dw_val_class_float: | |
4681 | fprintf (outfile, "floating-point constant"); | |
4682 | break; | |
4683 | case dw_val_class_flag: | |
a96c67ec | 4684 | fprintf (outfile, "%u", AT_flag (a)); |
3f76745e JM |
4685 | break; |
4686 | case dw_val_class_die_ref: | |
a96c67ec | 4687 | if (AT_ref (a) != NULL) |
881c6935 | 4688 | { |
1bfb5f8f | 4689 | if (AT_ref (a)->die_symbol) |
881c6935 JM |
4690 | fprintf (outfile, "die -> label: %s", AT_ref (a)->die_symbol); |
4691 | else | |
4692 | fprintf (outfile, "die -> %lu", AT_ref (a)->die_offset); | |
4693 | } | |
3f76745e JM |
4694 | else |
4695 | fprintf (outfile, "die -> <null>"); | |
4696 | break; | |
4697 | case dw_val_class_lbl_id: | |
8b790721 | 4698 | case dw_val_class_lbl_offset: |
a96c67ec | 4699 | fprintf (outfile, "label: %s", AT_lbl (a)); |
3f76745e | 4700 | break; |
3f76745e | 4701 | case dw_val_class_str: |
a96c67ec JM |
4702 | if (AT_string (a) != NULL) |
4703 | fprintf (outfile, "\"%s\"", AT_string (a)); | |
3f76745e JM |
4704 | else |
4705 | fprintf (outfile, "<null>"); | |
4706 | break; | |
e9a25f70 JL |
4707 | default: |
4708 | break; | |
3f76745e JM |
4709 | } |
4710 | ||
4711 | fprintf (outfile, "\n"); | |
4712 | } | |
4713 | ||
4714 | if (die->die_child != NULL) | |
4715 | { | |
4716 | print_indent += 4; | |
4717 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
4718 | print_die (c, outfile); | |
71dfc51f | 4719 | |
3f76745e | 4720 | print_indent -= 4; |
a3f97cbb | 4721 | } |
881c6935 JM |
4722 | if (print_indent == 0) |
4723 | fprintf (outfile, "\n"); | |
a3f97cbb JW |
4724 | } |
4725 | ||
3f76745e JM |
4726 | /* Print the contents of the source code line number correspondence table. |
4727 | This routine is a debugging aid only. */ | |
71dfc51f | 4728 | |
3f76745e JM |
4729 | static void |
4730 | print_dwarf_line_table (outfile) | |
4731 | FILE *outfile; | |
a3f97cbb | 4732 | { |
3f76745e JM |
4733 | register unsigned i; |
4734 | register dw_line_info_ref line_info; | |
4735 | ||
4736 | fprintf (outfile, "\n\nDWARF source line information\n"); | |
4737 | for (i = 1; i < line_info_table_in_use; ++i) | |
a3f97cbb | 4738 | { |
3f76745e JM |
4739 | line_info = &line_info_table[i]; |
4740 | fprintf (outfile, "%5d: ", i); | |
2e18bbae | 4741 | fprintf (outfile, "%-20s", line_file_table.table[line_info->dw_file_num]); |
2d8b0f3a | 4742 | fprintf (outfile, "%6ld", line_info->dw_line_num); |
3f76745e | 4743 | fprintf (outfile, "\n"); |
a3f97cbb | 4744 | } |
3f76745e JM |
4745 | |
4746 | fprintf (outfile, "\n\n"); | |
f37230f0 JM |
4747 | } |
4748 | ||
3f76745e JM |
4749 | /* Print the information collected for a given DIE. */ |
4750 | ||
4751 | void | |
4752 | debug_dwarf_die (die) | |
4753 | dw_die_ref die; | |
4754 | { | |
4755 | print_die (die, stderr); | |
4756 | } | |
4757 | ||
4758 | /* Print all DWARF information collected for the compilation unit. | |
4759 | This routine is a debugging aid only. */ | |
4760 | ||
4761 | void | |
4762 | debug_dwarf () | |
4763 | { | |
4764 | print_indent = 0; | |
4765 | print_die (comp_unit_die, stderr); | |
b2244e22 JW |
4766 | if (! DWARF2_ASM_LINE_DEBUG_INFO) |
4767 | print_dwarf_line_table (stderr); | |
3f76745e JM |
4768 | } |
4769 | \f | |
a96c67ec JM |
4770 | /* We build up the lists of children and attributes by pushing new ones |
4771 | onto the beginning of the list. Reverse the lists for DIE so that | |
4772 | they are in order of addition. */ | |
71dfc51f | 4773 | |
f37230f0 | 4774 | static void |
a96c67ec | 4775 | reverse_die_lists (die) |
3f76745e | 4776 | register dw_die_ref die; |
f37230f0 | 4777 | { |
a96c67ec JM |
4778 | register dw_die_ref c, cp, cn; |
4779 | register dw_attr_ref a, ap, an; | |
71dfc51f | 4780 | |
a96c67ec | 4781 | for (a = die->die_attr, ap = 0; a; a = an) |
7d9d8943 AM |
4782 | { |
4783 | an = a->dw_attr_next; | |
4784 | a->dw_attr_next = ap; | |
4785 | ap = a; | |
a3f97cbb | 4786 | } |
7d9d8943 | 4787 | die->die_attr = ap; |
3f76745e | 4788 | |
7d9d8943 AM |
4789 | for (c = die->die_child, cp = 0; c; c = cn) |
4790 | { | |
4791 | cn = c->die_sib; | |
4792 | c->die_sib = cp; | |
4793 | cp = c; | |
4794 | } | |
4795 | die->die_child = cp; | |
a3f97cbb JW |
4796 | } |
4797 | ||
881c6935 JM |
4798 | /* reverse_die_lists only reverses the single die you pass it. Since |
4799 | we used to reverse all dies in add_sibling_attributes, which runs | |
4800 | through all the dies, it would reverse all the dies. Now, however, | |
4801 | since we don't call reverse_die_lists in add_sibling_attributes, we | |
4802 | need a routine to recursively reverse all the dies. This is that | |
4803 | routine. */ | |
71dfc51f | 4804 | |
7d9d8943 | 4805 | static void |
881c6935 | 4806 | reverse_all_dies (die) |
7d9d8943 | 4807 | register dw_die_ref die; |
a3f97cbb | 4808 | { |
7d9d8943 | 4809 | register dw_die_ref c; |
71dfc51f | 4810 | |
7d9d8943 | 4811 | reverse_die_lists (die); |
3f76745e | 4812 | |
881c6935 JM |
4813 | for (c = die->die_child; c; c = c->die_sib) |
4814 | reverse_all_dies (c); | |
4815 | } | |
4816 | ||
4817 | /* Start a new compilation unit DIE for an include file. OLD_UNIT is | |
4818 | the CU for the enclosing include file, if any. BINCL_DIE is the | |
4819 | DW_TAG_GNU_BINCL DIE that marks the start of the DIEs for this | |
4820 | include file. */ | |
4821 | ||
4822 | static dw_die_ref | |
4823 | push_new_compile_unit (old_unit, bincl_die) | |
4824 | dw_die_ref old_unit, bincl_die; | |
4825 | { | |
4826 | const char *filename = get_AT_string (bincl_die, DW_AT_name); | |
4827 | dw_die_ref new_unit = gen_compile_unit_die (filename); | |
4828 | new_unit->die_sib = old_unit; | |
4829 | return new_unit; | |
4830 | } | |
4831 | ||
4832 | /* Close an include-file CU and reopen the enclosing one. */ | |
4833 | ||
4834 | static dw_die_ref | |
4835 | pop_compile_unit (old_unit) | |
4836 | dw_die_ref old_unit; | |
4837 | { | |
4838 | dw_die_ref new_unit = old_unit->die_sib; | |
4839 | old_unit->die_sib = NULL; | |
4840 | return new_unit; | |
4841 | } | |
4842 | ||
4843 | #define PROCESS(FOO) md5_process_bytes (&(FOO), sizeof (FOO), ctx) | |
4844 | #define PROCESS_STRING(FOO) md5_process_bytes ((FOO), strlen (FOO), ctx) | |
4845 | ||
4846 | /* Calculate the checksum of a location expression. */ | |
4847 | ||
4848 | static inline void | |
4849 | loc_checksum (loc, ctx) | |
4850 | dw_loc_descr_ref loc; | |
4851 | struct md5_ctx *ctx; | |
4852 | { | |
4853 | PROCESS (loc->dw_loc_opc); | |
4854 | PROCESS (loc->dw_loc_oprnd1); | |
4855 | PROCESS (loc->dw_loc_oprnd2); | |
4856 | } | |
4857 | ||
4858 | /* Calculate the checksum of an attribute. */ | |
4859 | ||
4860 | static void | |
4861 | attr_checksum (at, ctx) | |
4862 | dw_attr_ref at; | |
4863 | struct md5_ctx *ctx; | |
4864 | { | |
4865 | dw_loc_descr_ref loc; | |
4866 | rtx r; | |
4867 | ||
4868 | PROCESS (at->dw_attr); | |
4869 | ||
4870 | /* We don't care about differences in file numbering. */ | |
5f632b5e JM |
4871 | if (at->dw_attr == DW_AT_decl_file |
4872 | /* Or that this was compiled with a different compiler snapshot; if | |
4873 | the output is the same, that's what matters. */ | |
4874 | || at->dw_attr == DW_AT_producer) | |
881c6935 JM |
4875 | return; |
4876 | ||
4877 | switch (AT_class (at)) | |
4878 | { | |
4879 | case dw_val_class_const: | |
4880 | PROCESS (at->dw_attr_val.v.val_int); | |
4881 | break; | |
4882 | case dw_val_class_unsigned_const: | |
4883 | PROCESS (at->dw_attr_val.v.val_unsigned); | |
4884 | break; | |
4885 | case dw_val_class_long_long: | |
4886 | PROCESS (at->dw_attr_val.v.val_long_long); | |
4887 | break; | |
4888 | case dw_val_class_float: | |
4889 | PROCESS (at->dw_attr_val.v.val_float); | |
4890 | break; | |
4891 | case dw_val_class_flag: | |
4892 | PROCESS (at->dw_attr_val.v.val_flag); | |
4893 | break; | |
4894 | ||
4895 | case dw_val_class_str: | |
4896 | PROCESS_STRING (AT_string (at)); | |
4897 | break; | |
4898 | case dw_val_class_addr: | |
4899 | r = AT_addr (at); | |
4900 | switch (GET_CODE (r)) | |
4901 | { | |
4902 | case SYMBOL_REF: | |
4903 | PROCESS_STRING (XSTR (r, 0)); | |
4904 | break; | |
4905 | ||
4906 | default: | |
4907 | abort (); | |
4908 | } | |
4909 | break; | |
4910 | ||
4911 | case dw_val_class_loc: | |
4912 | for (loc = AT_loc (at); loc; loc = loc->dw_loc_next) | |
4913 | loc_checksum (loc, ctx); | |
4914 | break; | |
4915 | ||
4916 | case dw_val_class_die_ref: | |
4917 | if (AT_ref (at)->die_offset) | |
4918 | PROCESS (AT_ref (at)->die_offset); | |
4919 | /* FIXME else use target die name or something. */ | |
4920 | ||
4921 | case dw_val_class_fde_ref: | |
4922 | case dw_val_class_lbl_id: | |
4923 | case dw_val_class_lbl_offset: | |
4924 | ||
4925 | default: | |
4926 | break; | |
4927 | } | |
4928 | } | |
4929 | ||
4930 | /* Calculate the checksum of a DIE. */ | |
4931 | ||
4932 | static void | |
4933 | die_checksum (die, ctx) | |
4934 | dw_die_ref die; | |
4935 | struct md5_ctx *ctx; | |
4936 | { | |
4937 | dw_die_ref c; | |
4938 | dw_attr_ref a; | |
4939 | ||
4940 | PROCESS (die->die_tag); | |
4941 | ||
4942 | for (a = die->die_attr; a; a = a->dw_attr_next) | |
4943 | attr_checksum (a, ctx); | |
4944 | ||
4945 | for (c = die->die_child; c; c = c->die_sib) | |
4946 | die_checksum (c, ctx); | |
4947 | } | |
4948 | ||
4949 | #undef PROCESS | |
4950 | #undef PROCESS_STRING | |
4951 | ||
4952 | /* The prefix to attach to symbols on DIEs in the current comdat debug | |
4953 | info section. */ | |
4954 | static char *comdat_symbol_id; | |
4955 | ||
4956 | /* The index of the current symbol within the current comdat CU. */ | |
4957 | static unsigned int comdat_symbol_number; | |
4958 | ||
4959 | /* Calculate the MD5 checksum of the compilation unit DIE UNIT_DIE and its | |
4960 | children, and set comdat_symbol_id accordingly. */ | |
4961 | ||
4962 | static void | |
4963 | compute_section_prefix (unit_die) | |
4964 | dw_die_ref unit_die; | |
4965 | { | |
4966 | char *p, *name; | |
4967 | int i; | |
4968 | unsigned char checksum[16]; | |
4969 | struct md5_ctx ctx; | |
4970 | ||
4971 | md5_init_ctx (&ctx); | |
4972 | die_checksum (unit_die, &ctx); | |
4973 | md5_finish_ctx (&ctx, checksum); | |
4974 | ||
b3e68a79 | 4975 | p = lbasename (get_AT_string (unit_die, DW_AT_name)); |
881c6935 JM |
4976 | name = (char *) alloca (strlen (p) + 64); |
4977 | sprintf (name, "%s.", p); | |
4978 | ||
4979 | clean_symbol_name (name); | |
4980 | ||
4981 | p = name + strlen (name); | |
4982 | for (i = 0; i < 4; ++i) | |
4983 | { | |
4984 | sprintf (p, "%.2x", checksum[i]); | |
4985 | p += 2; | |
4986 | } | |
4987 | ||
4988 | comdat_symbol_id = unit_die->die_symbol = xstrdup (name); | |
4989 | comdat_symbol_number = 0; | |
4990 | } | |
4991 | ||
4992 | /* Returns nonzero iff DIE represents a type, in the sense of TYPE_P. */ | |
4993 | ||
4994 | static int | |
4995 | is_type_die (die) | |
4996 | dw_die_ref die; | |
4997 | { | |
4998 | switch (die->die_tag) | |
4999 | { | |
5000 | case DW_TAG_array_type: | |
5001 | case DW_TAG_class_type: | |
5002 | case DW_TAG_enumeration_type: | |
5003 | case DW_TAG_pointer_type: | |
5004 | case DW_TAG_reference_type: | |
5005 | case DW_TAG_string_type: | |
5006 | case DW_TAG_structure_type: | |
5007 | case DW_TAG_subroutine_type: | |
5008 | case DW_TAG_union_type: | |
5009 | case DW_TAG_ptr_to_member_type: | |
5010 | case DW_TAG_set_type: | |
5011 | case DW_TAG_subrange_type: | |
5012 | case DW_TAG_base_type: | |
5013 | case DW_TAG_const_type: | |
5014 | case DW_TAG_file_type: | |
5015 | case DW_TAG_packed_type: | |
5016 | case DW_TAG_volatile_type: | |
5017 | return 1; | |
5018 | default: | |
5019 | return 0; | |
5020 | } | |
5021 | } | |
5022 | ||
5023 | /* Returns 1 iff C is the sort of DIE that should go into a COMDAT CU. | |
5024 | Basically, we want to choose the bits that are likely to be shared between | |
5025 | compilations (types) and leave out the bits that are specific to individual | |
5026 | compilations (functions). */ | |
5027 | ||
5028 | static int | |
5029 | is_comdat_die (c) | |
5030 | dw_die_ref c; | |
5031 | { | |
5032 | #if 1 | |
5033 | /* I think we want to leave base types and __vtbl_ptr_type in the | |
5034 | main CU, as we do for stabs. The advantage is a greater | |
5035 | likelihood of sharing between objects that don't include headers | |
5036 | in the same order (and therefore would put the base types in a | |
5037 | different comdat). jason 8/28/00 */ | |
5038 | if (c->die_tag == DW_TAG_base_type) | |
5039 | return 0; | |
5040 | ||
5041 | if (c->die_tag == DW_TAG_pointer_type | |
5042 | || c->die_tag == DW_TAG_reference_type | |
5043 | || c->die_tag == DW_TAG_const_type | |
5044 | || c->die_tag == DW_TAG_volatile_type) | |
5045 | { | |
5046 | dw_die_ref t = get_AT_ref (c, DW_AT_type); | |
5047 | return t ? is_comdat_die (t) : 0; | |
5048 | } | |
5049 | #endif | |
5050 | ||
5051 | return is_type_die (c); | |
5052 | } | |
5053 | ||
5054 | /* Returns 1 iff C is the sort of DIE that might be referred to from another | |
5055 | compilation unit. */ | |
5056 | ||
5057 | static int | |
5058 | is_symbol_die (c) | |
5059 | dw_die_ref c; | |
5060 | { | |
5061 | if (is_type_die (c)) | |
5062 | return 1; | |
5063 | if (get_AT (c, DW_AT_declaration) | |
5064 | && ! get_AT (c, DW_AT_specification)) | |
5065 | return 1; | |
5066 | return 0; | |
5067 | } | |
5068 | ||
5069 | static char * | |
5070 | gen_internal_sym () | |
5071 | { | |
5072 | char buf[256]; | |
5073 | static int label_num; | |
5074 | ASM_GENERATE_INTERNAL_LABEL (buf, "LDIE", label_num++); | |
5075 | return xstrdup (buf); | |
5076 | } | |
5077 | ||
5078 | /* Assign symbols to all worthy DIEs under DIE. */ | |
5079 | ||
5080 | static void | |
5081 | assign_symbol_names (die) | |
5082 | register dw_die_ref die; | |
5083 | { | |
5084 | register dw_die_ref c; | |
5085 | ||
5086 | if (is_symbol_die (die)) | |
5087 | { | |
5088 | if (comdat_symbol_id) | |
5089 | { | |
5090 | char *p = alloca (strlen (comdat_symbol_id) + 64); | |
5091 | sprintf (p, "%s.%s.%x", DIE_LABEL_PREFIX, | |
5092 | comdat_symbol_id, comdat_symbol_number++); | |
5093 | die->die_symbol = xstrdup (p); | |
5094 | } | |
5095 | else | |
5096 | die->die_symbol = gen_internal_sym (); | |
5097 | } | |
5098 | ||
5099 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
5100 | assign_symbol_names (c); | |
5101 | } | |
5102 | ||
5103 | /* Traverse the DIE (which is always comp_unit_die), and set up | |
5104 | additional compilation units for each of the include files we see | |
5105 | bracketed by BINCL/EINCL. */ | |
5106 | ||
5107 | static void | |
5108 | break_out_includes (die) | |
5109 | register dw_die_ref die; | |
5110 | { | |
5111 | dw_die_ref *ptr; | |
5112 | register dw_die_ref unit = NULL; | |
5113 | limbo_die_node *node; | |
5114 | ||
5115 | for (ptr = &(die->die_child); *ptr; ) | |
5116 | { | |
5117 | register dw_die_ref c = *ptr; | |
5118 | ||
5119 | if (c->die_tag == DW_TAG_GNU_BINCL | |
5120 | || c->die_tag == DW_TAG_GNU_EINCL | |
5121 | || (unit && is_comdat_die (c))) | |
5122 | { | |
5123 | /* This DIE is for a secondary CU; remove it from the main one. */ | |
5124 | *ptr = c->die_sib; | |
5125 | ||
5126 | if (c->die_tag == DW_TAG_GNU_BINCL) | |
5127 | { | |
5128 | unit = push_new_compile_unit (unit, c); | |
5129 | free_die (c); | |
5130 | } | |
5131 | else if (c->die_tag == DW_TAG_GNU_EINCL) | |
5132 | { | |
5133 | unit = pop_compile_unit (unit); | |
5134 | free_die (c); | |
5135 | } | |
5136 | else | |
5137 | add_child_die (unit, c); | |
5138 | } | |
5139 | else | |
5140 | { | |
5141 | /* Leave this DIE in the main CU. */ | |
5142 | ptr = &(c->die_sib); | |
5143 | continue; | |
5144 | } | |
5145 | } | |
5146 | ||
5147 | #if 0 | |
5148 | /* We can only use this in debugging, since the frontend doesn't check | |
0b34cf1e | 5149 | to make sure that we leave every include file we enter. */ |
881c6935 JM |
5150 | if (unit != NULL) |
5151 | abort (); | |
5152 | #endif | |
5153 | ||
5154 | assign_symbol_names (die); | |
5155 | for (node = limbo_die_list; node; node = node->next) | |
5156 | { | |
5157 | compute_section_prefix (node->die); | |
5158 | assign_symbol_names (node->die); | |
5159 | } | |
5160 | } | |
5161 | ||
5162 | /* Traverse the DIE and add a sibling attribute if it may have the | |
5163 | effect of speeding up access to siblings. To save some space, | |
5164 | avoid generating sibling attributes for DIE's without children. */ | |
5165 | ||
5166 | static void | |
5167 | add_sibling_attributes (die) | |
5168 | register dw_die_ref die; | |
5169 | { | |
5170 | register dw_die_ref c; | |
5171 | ||
5172 | if (die->die_tag != DW_TAG_compile_unit | |
5173 | && die->die_sib && die->die_child != NULL) | |
7d9d8943 AM |
5174 | /* Add the sibling link to the front of the attribute list. */ |
5175 | add_AT_die_ref (die, DW_AT_sibling, die->die_sib); | |
5176 | ||
5177 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
5178 | add_sibling_attributes (c); | |
5179 | } | |
5180 | ||
5181 | /* The format of each DIE (and its attribute value pairs) | |
5182 | is encoded in an abbreviation table. This routine builds the | |
5183 | abbreviation table and assigns a unique abbreviation id for | |
5184 | each abbreviation entry. The children of each die are visited | |
5185 | recursively. */ | |
5186 | ||
5187 | static void | |
5188 | build_abbrev_table (die) | |
5189 | register dw_die_ref die; | |
5190 | { | |
5191 | register unsigned long abbrev_id; | |
5192 | register unsigned long n_alloc; | |
5193 | register dw_die_ref c; | |
5194 | register dw_attr_ref d_attr, a_attr; | |
881c6935 JM |
5195 | |
5196 | /* Scan the DIE references, and mark as external any that refer to | |
1bfb5f8f | 5197 | DIEs from other CUs (i.e. those which are not marked). */ |
881c6935 JM |
5198 | for (d_attr = die->die_attr; d_attr; d_attr = d_attr->dw_attr_next) |
5199 | { | |
5200 | if (AT_class (d_attr) == dw_val_class_die_ref | |
1bfb5f8f | 5201 | && AT_ref (d_attr)->die_mark == 0) |
881c6935 JM |
5202 | { |
5203 | if (AT_ref (d_attr)->die_symbol == 0) | |
5204 | abort (); | |
5205 | set_AT_ref_external (d_attr, 1); | |
5206 | } | |
5207 | } | |
5208 | ||
7d9d8943 AM |
5209 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
5210 | { | |
5211 | register dw_die_ref abbrev = abbrev_die_table[abbrev_id]; | |
5212 | ||
5213 | if (abbrev->die_tag == die->die_tag) | |
5214 | { | |
5215 | if ((abbrev->die_child != NULL) == (die->die_child != NULL)) | |
5216 | { | |
5217 | a_attr = abbrev->die_attr; | |
5218 | d_attr = die->die_attr; | |
5219 | ||
5220 | while (a_attr != NULL && d_attr != NULL) | |
5221 | { | |
5222 | if ((a_attr->dw_attr != d_attr->dw_attr) | |
5223 | || (value_format (a_attr) != value_format (d_attr))) | |
5224 | break; | |
5225 | ||
5226 | a_attr = a_attr->dw_attr_next; | |
5227 | d_attr = d_attr->dw_attr_next; | |
5228 | } | |
5229 | ||
5230 | if (a_attr == NULL && d_attr == NULL) | |
5231 | break; | |
5232 | } | |
5233 | } | |
5234 | } | |
5235 | ||
5236 | if (abbrev_id >= abbrev_die_table_in_use) | |
5237 | { | |
5238 | if (abbrev_die_table_in_use >= abbrev_die_table_allocated) | |
5239 | { | |
5240 | n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT; | |
556273e0 | 5241 | abbrev_die_table |
7d9d8943 AM |
5242 | = (dw_die_ref *) xrealloc (abbrev_die_table, |
5243 | sizeof (dw_die_ref) * n_alloc); | |
5244 | ||
961192e1 | 5245 | memset ((char *) &abbrev_die_table[abbrev_die_table_allocated], 0, |
7d9d8943 AM |
5246 | (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref)); |
5247 | abbrev_die_table_allocated = n_alloc; | |
5248 | } | |
5249 | ||
5250 | ++abbrev_die_table_in_use; | |
5251 | abbrev_die_table[abbrev_id] = die; | |
5252 | } | |
5253 | ||
5254 | die->die_abbrev = abbrev_id; | |
5255 | for (c = die->die_child; c != NULL; c = c->die_sib) | |
5256 | build_abbrev_table (c); | |
5257 | } | |
5258 | \f | |
5259 | /* Return the size of a string, including the null byte. | |
5260 | ||
5261 | This used to treat backslashes as escapes, and hence they were not included | |
5262 | in the count. However, that conflicts with what ASM_OUTPUT_ASCII does, | |
5263 | which treats a backslash as a backslash, escaping it if necessary, and hence | |
5264 | we must include them in the count. */ | |
5265 | ||
5266 | static unsigned long | |
5267 | size_of_string (str) | |
5268 | register const char *str; | |
5269 | { | |
5270 | return strlen (str) + 1; | |
3f76745e JM |
5271 | } |
5272 | ||
5273 | /* Return the power-of-two number of bytes necessary to represent VALUE. */ | |
5274 | ||
5275 | static int | |
5276 | constant_size (value) | |
5277 | long unsigned value; | |
5278 | { | |
5279 | int log; | |
5280 | ||
5281 | if (value == 0) | |
5282 | log = 0; | |
a3f97cbb | 5283 | else |
3f76745e | 5284 | log = floor_log2 (value); |
71dfc51f | 5285 | |
3f76745e JM |
5286 | log = log / 8; |
5287 | log = 1 << (floor_log2 (log) + 1); | |
5288 | ||
5289 | return log; | |
a3f97cbb JW |
5290 | } |
5291 | ||
3f76745e JM |
5292 | /* Return the size of a DIE, as it is represented in the |
5293 | .debug_info section. */ | |
71dfc51f | 5294 | |
3f76745e JM |
5295 | static unsigned long |
5296 | size_of_die (die) | |
a3f97cbb JW |
5297 | register dw_die_ref die; |
5298 | { | |
3f76745e | 5299 | register unsigned long size = 0; |
a3f97cbb | 5300 | register dw_attr_ref a; |
71dfc51f | 5301 | |
3f76745e | 5302 | size += size_of_uleb128 (die->die_abbrev); |
a3f97cbb JW |
5303 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) |
5304 | { | |
a96c67ec | 5305 | switch (AT_class (a)) |
a3f97cbb JW |
5306 | { |
5307 | case dw_val_class_addr: | |
a1a4189d | 5308 | size += DWARF2_ADDR_SIZE; |
a3f97cbb JW |
5309 | break; |
5310 | case dw_val_class_loc: | |
3f76745e | 5311 | { |
a96c67ec | 5312 | register unsigned long lsize = size_of_locs (AT_loc (a)); |
71dfc51f | 5313 | |
3f76745e JM |
5314 | /* Block length. */ |
5315 | size += constant_size (lsize); | |
5316 | size += lsize; | |
5317 | } | |
a3f97cbb JW |
5318 | break; |
5319 | case dw_val_class_const: | |
25dd13ec | 5320 | size += size_of_sleb128 (AT_int (a)); |
a3f97cbb JW |
5321 | break; |
5322 | case dw_val_class_unsigned_const: | |
a96c67ec | 5323 | size += constant_size (AT_unsigned (a)); |
a3f97cbb | 5324 | break; |
469ac993 | 5325 | case dw_val_class_long_long: |
2e4b9b8c | 5326 | size += 1 + 2*HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR; /* block */ |
469ac993 JM |
5327 | break; |
5328 | case dw_val_class_float: | |
3f76745e | 5329 | size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */ |
a3f97cbb JW |
5330 | break; |
5331 | case dw_val_class_flag: | |
3f76745e | 5332 | size += 1; |
a3f97cbb JW |
5333 | break; |
5334 | case dw_val_class_die_ref: | |
3f76745e | 5335 | size += DWARF_OFFSET_SIZE; |
a3f97cbb JW |
5336 | break; |
5337 | case dw_val_class_fde_ref: | |
3f76745e | 5338 | size += DWARF_OFFSET_SIZE; |
a3f97cbb JW |
5339 | break; |
5340 | case dw_val_class_lbl_id: | |
a1a4189d | 5341 | size += DWARF2_ADDR_SIZE; |
3f76745e | 5342 | break; |
8b790721 | 5343 | case dw_val_class_lbl_offset: |
3f76745e JM |
5344 | size += DWARF_OFFSET_SIZE; |
5345 | break; | |
5346 | case dw_val_class_str: | |
a96c67ec | 5347 | size += size_of_string (AT_string (a)); |
3f76745e JM |
5348 | break; |
5349 | default: | |
5350 | abort (); | |
5351 | } | |
a3f97cbb | 5352 | } |
3f76745e JM |
5353 | |
5354 | return size; | |
a3f97cbb JW |
5355 | } |
5356 | ||
956d6950 | 5357 | /* Size the debugging information associated with a given DIE. |
3f76745e JM |
5358 | Visits the DIE's children recursively. Updates the global |
5359 | variable next_die_offset, on each time through. Uses the | |
956d6950 | 5360 | current value of next_die_offset to update the die_offset |
3f76745e | 5361 | field in each DIE. */ |
71dfc51f | 5362 | |
a3f97cbb | 5363 | static void |
3f76745e JM |
5364 | calc_die_sizes (die) |
5365 | dw_die_ref die; | |
a3f97cbb | 5366 | { |
3f76745e JM |
5367 | register dw_die_ref c; |
5368 | die->die_offset = next_die_offset; | |
5369 | next_die_offset += size_of_die (die); | |
71dfc51f | 5370 | |
3f76745e JM |
5371 | for (c = die->die_child; c != NULL; c = c->die_sib) |
5372 | calc_die_sizes (c); | |
71dfc51f | 5373 | |
3f76745e JM |
5374 | if (die->die_child != NULL) |
5375 | /* Count the null byte used to terminate sibling lists. */ | |
5376 | next_die_offset += 1; | |
a3f97cbb JW |
5377 | } |
5378 | ||
1bfb5f8f | 5379 | /* Set the marks for a die and its children. We do this so |
881c6935 | 5380 | that we know whether or not a reference needs to use FORM_ref_addr; only |
1bfb5f8f JM |
5381 | DIEs in the same CU will be marked. We used to clear out the offset |
5382 | and use that as the flag, but ran into ordering problems. */ | |
881c6935 JM |
5383 | |
5384 | static void | |
1bfb5f8f | 5385 | mark_dies (die) |
881c6935 JM |
5386 | dw_die_ref die; |
5387 | { | |
5388 | register dw_die_ref c; | |
1bfb5f8f JM |
5389 | die->die_mark = 1; |
5390 | for (c = die->die_child; c; c = c->die_sib) | |
5391 | mark_dies (c); | |
5392 | } | |
5393 | ||
5394 | /* Clear the marks for a die and its children. */ | |
5395 | ||
5396 | static void | |
5397 | unmark_dies (die) | |
5398 | dw_die_ref die; | |
5399 | { | |
5400 | register dw_die_ref c; | |
5401 | die->die_mark = 0; | |
881c6935 | 5402 | for (c = die->die_child; c; c = c->die_sib) |
1bfb5f8f | 5403 | unmark_dies (c); |
881c6935 JM |
5404 | } |
5405 | ||
3f76745e JM |
5406 | /* Return the size of the line information prolog generated for the |
5407 | compilation unit. */ | |
469ac993 | 5408 | |
3f76745e JM |
5409 | static unsigned long |
5410 | size_of_line_prolog () | |
a94dbf2c | 5411 | { |
3f76745e JM |
5412 | register unsigned long size; |
5413 | register unsigned long ft_index; | |
a94dbf2c | 5414 | |
3f76745e | 5415 | size = DWARF_LINE_PROLOG_HEADER_SIZE; |
469ac993 | 5416 | |
3f76745e JM |
5417 | /* Count the size of the table giving number of args for each |
5418 | standard opcode. */ | |
5419 | size += DWARF_LINE_OPCODE_BASE - 1; | |
71dfc51f | 5420 | |
3f76745e | 5421 | /* Include directory table is empty (at present). Count only the |
38e01259 | 5422 | null byte used to terminate the table. */ |
3f76745e | 5423 | size += 1; |
71dfc51f | 5424 | |
2e18bbae | 5425 | for (ft_index = 1; ft_index < decl_file_table.in_use; ++ft_index) |
3f76745e JM |
5426 | { |
5427 | /* File name entry. */ | |
2e18bbae | 5428 | size += size_of_string (decl_file_table.table[ft_index]); |
a94dbf2c | 5429 | |
3f76745e JM |
5430 | /* Include directory index. */ |
5431 | size += size_of_uleb128 (0); | |
a94dbf2c | 5432 | |
3f76745e JM |
5433 | /* Modification time. */ |
5434 | size += size_of_uleb128 (0); | |
71dfc51f | 5435 | |
3f76745e JM |
5436 | /* File length in bytes. */ |
5437 | size += size_of_uleb128 (0); | |
a94dbf2c | 5438 | } |
71dfc51f | 5439 | |
3f76745e JM |
5440 | /* Count the file table terminator. */ |
5441 | size += 1; | |
5442 | return size; | |
a94dbf2c JM |
5443 | } |
5444 | ||
3f76745e JM |
5445 | /* Return the size of the .debug_pubnames table generated for the |
5446 | compilation unit. */ | |
a94dbf2c | 5447 | |
3f76745e JM |
5448 | static unsigned long |
5449 | size_of_pubnames () | |
a94dbf2c | 5450 | { |
3f76745e JM |
5451 | register unsigned long size; |
5452 | register unsigned i; | |
469ac993 | 5453 | |
3f76745e JM |
5454 | size = DWARF_PUBNAMES_HEADER_SIZE; |
5455 | for (i = 0; i < pubname_table_in_use; ++i) | |
a94dbf2c | 5456 | { |
3f76745e JM |
5457 | register pubname_ref p = &pubname_table[i]; |
5458 | size += DWARF_OFFSET_SIZE + size_of_string (p->name); | |
a94dbf2c JM |
5459 | } |
5460 | ||
3f76745e JM |
5461 | size += DWARF_OFFSET_SIZE; |
5462 | return size; | |
a94dbf2c JM |
5463 | } |
5464 | ||
956d6950 | 5465 | /* Return the size of the information in the .debug_aranges section. */ |
469ac993 | 5466 | |
3f76745e JM |
5467 | static unsigned long |
5468 | size_of_aranges () | |
469ac993 | 5469 | { |
3f76745e | 5470 | register unsigned long size; |
469ac993 | 5471 | |
3f76745e | 5472 | size = DWARF_ARANGES_HEADER_SIZE; |
469ac993 | 5473 | |
3f76745e | 5474 | /* Count the address/length pair for this compilation unit. */ |
a1a4189d JB |
5475 | size += 2 * DWARF2_ADDR_SIZE; |
5476 | size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use; | |
469ac993 | 5477 | |
3f76745e | 5478 | /* Count the two zero words used to terminated the address range table. */ |
a1a4189d | 5479 | size += 2 * DWARF2_ADDR_SIZE; |
3f76745e JM |
5480 | return size; |
5481 | } | |
5482 | \f | |
5483 | /* Select the encoding of an attribute value. */ | |
5484 | ||
5485 | static enum dwarf_form | |
a96c67ec JM |
5486 | value_format (a) |
5487 | dw_attr_ref a; | |
3f76745e | 5488 | { |
a96c67ec | 5489 | switch (a->dw_attr_val.val_class) |
469ac993 | 5490 | { |
3f76745e JM |
5491 | case dw_val_class_addr: |
5492 | return DW_FORM_addr; | |
5493 | case dw_val_class_loc: | |
a96c67ec | 5494 | switch (constant_size (size_of_locs (AT_loc (a)))) |
469ac993 | 5495 | { |
3f76745e JM |
5496 | case 1: |
5497 | return DW_FORM_block1; | |
5498 | case 2: | |
5499 | return DW_FORM_block2; | |
469ac993 JM |
5500 | default: |
5501 | abort (); | |
5502 | } | |
3f76745e | 5503 | case dw_val_class_const: |
25dd13ec | 5504 | return DW_FORM_sdata; |
3f76745e | 5505 | case dw_val_class_unsigned_const: |
a96c67ec | 5506 | switch (constant_size (AT_unsigned (a))) |
3f76745e JM |
5507 | { |
5508 | case 1: | |
5509 | return DW_FORM_data1; | |
5510 | case 2: | |
5511 | return DW_FORM_data2; | |
5512 | case 4: | |
5513 | return DW_FORM_data4; | |
5514 | case 8: | |
5515 | return DW_FORM_data8; | |
5516 | default: | |
5517 | abort (); | |
5518 | } | |
5519 | case dw_val_class_long_long: | |
5520 | return DW_FORM_block1; | |
5521 | case dw_val_class_float: | |
5522 | return DW_FORM_block1; | |
5523 | case dw_val_class_flag: | |
5524 | return DW_FORM_flag; | |
5525 | case dw_val_class_die_ref: | |
881c6935 JM |
5526 | if (AT_ref_external (a)) |
5527 | return DW_FORM_ref_addr; | |
5528 | else | |
5529 | return DW_FORM_ref; | |
3f76745e JM |
5530 | case dw_val_class_fde_ref: |
5531 | return DW_FORM_data; | |
5532 | case dw_val_class_lbl_id: | |
5533 | return DW_FORM_addr; | |
8b790721 | 5534 | case dw_val_class_lbl_offset: |
3f76745e JM |
5535 | return DW_FORM_data; |
5536 | case dw_val_class_str: | |
5537 | return DW_FORM_string; | |
469ac993 JM |
5538 | default: |
5539 | abort (); | |
5540 | } | |
a94dbf2c JM |
5541 | } |
5542 | ||
3f76745e | 5543 | /* Output the encoding of an attribute value. */ |
469ac993 | 5544 | |
3f76745e | 5545 | static void |
a96c67ec JM |
5546 | output_value_format (a) |
5547 | dw_attr_ref a; | |
a94dbf2c | 5548 | { |
a96c67ec | 5549 | enum dwarf_form form = value_format (a); |
2e4b9b8c | 5550 | dw2_asm_output_data_uleb128 (form, "(%s)", dwarf_form_name (form)); |
3f76745e | 5551 | } |
469ac993 | 5552 | |
3f76745e JM |
5553 | /* Output the .debug_abbrev section which defines the DIE abbreviation |
5554 | table. */ | |
469ac993 | 5555 | |
3f76745e JM |
5556 | static void |
5557 | output_abbrev_section () | |
5558 | { | |
5559 | unsigned long abbrev_id; | |
71dfc51f | 5560 | |
3f76745e JM |
5561 | dw_attr_ref a_attr; |
5562 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) | |
5563 | { | |
5564 | register dw_die_ref abbrev = abbrev_die_table[abbrev_id]; | |
71dfc51f | 5565 | |
2e4b9b8c | 5566 | dw2_asm_output_data_uleb128 (abbrev_id, "(abbrev code)"); |
469ac993 | 5567 | |
2e4b9b8c RH |
5568 | dw2_asm_output_data_uleb128 (abbrev->die_tag, "(TAG: %s)", |
5569 | dwarf_tag_name (abbrev->die_tag)); | |
71dfc51f | 5570 | |
2e4b9b8c RH |
5571 | if (abbrev->die_child != NULL) |
5572 | dw2_asm_output_data (1, DW_children_yes, "DW_children_yes"); | |
5573 | else | |
5574 | dw2_asm_output_data (1, DW_children_no, "DW_children_no"); | |
3f76745e JM |
5575 | |
5576 | for (a_attr = abbrev->die_attr; a_attr != NULL; | |
5577 | a_attr = a_attr->dw_attr_next) | |
5578 | { | |
2e4b9b8c RH |
5579 | dw2_asm_output_data_uleb128 (a_attr->dw_attr, "(%s)", |
5580 | dwarf_attr_name (a_attr->dw_attr)); | |
a96c67ec | 5581 | output_value_format (a_attr); |
469ac993 | 5582 | } |
469ac993 | 5583 | |
2e4b9b8c RH |
5584 | dw2_asm_output_data (1, 0, NULL); |
5585 | dw2_asm_output_data (1, 0, NULL); | |
469ac993 | 5586 | } |
81f374eb HPN |
5587 | |
5588 | /* Terminate the table. */ | |
2e4b9b8c | 5589 | dw2_asm_output_data (1, 0, NULL); |
a94dbf2c JM |
5590 | } |
5591 | ||
881c6935 JM |
5592 | /* Output a symbol we can use to refer to this DIE from another CU. */ |
5593 | ||
5594 | static inline void | |
5595 | output_die_symbol (die) | |
5596 | register dw_die_ref die; | |
5597 | { | |
5598 | char *sym = die->die_symbol; | |
5599 | ||
5600 | if (sym == 0) | |
5601 | return; | |
5602 | ||
5603 | if (strncmp (sym, DIE_LABEL_PREFIX, sizeof (DIE_LABEL_PREFIX) - 1) == 0) | |
5604 | /* We make these global, not weak; if the target doesn't support | |
5605 | .linkonce, it doesn't support combining the sections, so debugging | |
5606 | will break. */ | |
5607 | ASM_GLOBALIZE_LABEL (asm_out_file, sym); | |
5608 | ASM_OUTPUT_LABEL (asm_out_file, sym); | |
5609 | } | |
5610 | ||
3f76745e JM |
5611 | /* Output the DIE and its attributes. Called recursively to generate |
5612 | the definitions of each child DIE. */ | |
71dfc51f | 5613 | |
a3f97cbb | 5614 | static void |
3f76745e JM |
5615 | output_die (die) |
5616 | register dw_die_ref die; | |
a3f97cbb | 5617 | { |
3f76745e JM |
5618 | register dw_attr_ref a; |
5619 | register dw_die_ref c; | |
3f76745e | 5620 | register unsigned long size; |
a94dbf2c | 5621 | |
881c6935 JM |
5622 | /* If someone in another CU might refer to us, set up a symbol for |
5623 | them to point to. */ | |
5624 | if (die->die_symbol) | |
5625 | output_die_symbol (die); | |
5626 | ||
2e4b9b8c RH |
5627 | dw2_asm_output_data_uleb128 (die->die_abbrev, "(DIE (0x%lx) %s)", |
5628 | die->die_offset, dwarf_tag_name (die->die_tag)); | |
a94dbf2c | 5629 | |
3f76745e | 5630 | for (a = die->die_attr; a != NULL; a = a->dw_attr_next) |
a3f97cbb | 5631 | { |
2e4b9b8c RH |
5632 | const char *name = dwarf_attr_name (a->dw_attr); |
5633 | ||
a96c67ec | 5634 | switch (AT_class (a)) |
3f76745e JM |
5635 | { |
5636 | case dw_val_class_addr: | |
2e4b9b8c | 5637 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, AT_addr (a), "%s", name); |
3f76745e | 5638 | break; |
a3f97cbb | 5639 | |
3f76745e | 5640 | case dw_val_class_loc: |
a96c67ec | 5641 | size = size_of_locs (AT_loc (a)); |
71dfc51f | 5642 | |
3f76745e | 5643 | /* Output the block length for this list of location operations. */ |
2e4b9b8c | 5644 | dw2_asm_output_data (constant_size (size), size, "%s", name); |
71dfc51f | 5645 | |
7d9d8943 | 5646 | output_loc_sequence (AT_loc (a)); |
a3f97cbb | 5647 | break; |
3f76745e JM |
5648 | |
5649 | case dw_val_class_const: | |
25dd13ec JW |
5650 | /* ??? It would be slightly more efficient to use a scheme like is |
5651 | used for unsigned constants below, but gdb 4.x does not sign | |
5652 | extend. Gdb 5.x does sign extend. */ | |
2e4b9b8c | 5653 | dw2_asm_output_data_sleb128 (AT_int (a), "%s", name); |
a3f97cbb | 5654 | break; |
3f76745e JM |
5655 | |
5656 | case dw_val_class_unsigned_const: | |
2e4b9b8c RH |
5657 | dw2_asm_output_data (constant_size (AT_unsigned (a)), |
5658 | AT_unsigned (a), "%s", name); | |
a3f97cbb | 5659 | break; |
3f76745e JM |
5660 | |
5661 | case dw_val_class_long_long: | |
2e4b9b8c RH |
5662 | { |
5663 | unsigned HOST_WIDE_INT first, second; | |
3f76745e | 5664 | |
2e4b9b8c RH |
5665 | dw2_asm_output_data (1, 2*HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR, |
5666 | "%s", name); | |
556273e0 | 5667 | |
2e4b9b8c RH |
5668 | if (WORDS_BIG_ENDIAN) |
5669 | { | |
5670 | first = a->dw_attr_val.v.val_long_long.hi; | |
5671 | second = a->dw_attr_val.v.val_long_long.low; | |
5672 | } | |
5673 | else | |
5674 | { | |
5675 | first = a->dw_attr_val.v.val_long_long.low; | |
5676 | second = a->dw_attr_val.v.val_long_long.hi; | |
5677 | } | |
5678 | dw2_asm_output_data (HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR, | |
5679 | first, "long long constant"); | |
5680 | dw2_asm_output_data (HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR, | |
5681 | second, NULL); | |
5682 | } | |
a3f97cbb | 5683 | break; |
3f76745e JM |
5684 | |
5685 | case dw_val_class_float: | |
c84e2712 KG |
5686 | { |
5687 | register unsigned int i; | |
c84e2712 | 5688 | |
2e4b9b8c RH |
5689 | dw2_asm_output_data (1, a->dw_attr_val.v.val_float.length * 4, |
5690 | "%s", name); | |
c84e2712 | 5691 | |
2e4b9b8c RH |
5692 | for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i) |
5693 | dw2_asm_output_data (4, a->dw_attr_val.v.val_float.array[i], | |
5694 | "fp constant word %u", i); | |
556273e0 | 5695 | break; |
c84e2712 | 5696 | } |
3f76745e JM |
5697 | |
5698 | case dw_val_class_flag: | |
2e4b9b8c | 5699 | dw2_asm_output_data (1, AT_flag (a), "%s", name); |
a3f97cbb | 5700 | break; |
3f76745e JM |
5701 | |
5702 | case dw_val_class_die_ref: | |
881c6935 | 5703 | if (AT_ref_external (a)) |
2e4b9b8c RH |
5704 | { |
5705 | char *sym = AT_ref (a)->die_symbol; | |
5706 | if (sym == 0) | |
5707 | abort (); | |
5708 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, sym, "%s", name); | |
5709 | } | |
3f4907a6 JM |
5710 | else if (AT_ref (a)->die_offset == 0) |
5711 | abort (); | |
881c6935 | 5712 | else |
2e4b9b8c RH |
5713 | dw2_asm_output_data (DWARF_OFFSET_SIZE, AT_ref (a)->die_offset, |
5714 | "%s", name); | |
a3f97cbb | 5715 | break; |
3f76745e JM |
5716 | |
5717 | case dw_val_class_fde_ref: | |
a6ab3aad JM |
5718 | { |
5719 | char l1[20]; | |
2e4b9b8c RH |
5720 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_LABEL, |
5721 | a->dw_attr_val.v.val_fde_index * 2); | |
5722 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, l1, "%s", name); | |
a6ab3aad | 5723 | } |
a3f97cbb | 5724 | break; |
a3f97cbb | 5725 | |
3f76745e | 5726 | case dw_val_class_lbl_id: |
2e4b9b8c | 5727 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, AT_lbl (a), "%s", name); |
3f76745e | 5728 | break; |
71dfc51f | 5729 | |
8b790721 | 5730 | case dw_val_class_lbl_offset: |
2e4b9b8c | 5731 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a), "%s", name); |
3f76745e | 5732 | break; |
a3f97cbb | 5733 | |
3f76745e | 5734 | case dw_val_class_str: |
2e4b9b8c | 5735 | dw2_asm_output_nstring (AT_string (a), -1, "%s", name); |
3f76745e | 5736 | break; |
b2932ae5 | 5737 | |
3f76745e JM |
5738 | default: |
5739 | abort (); | |
5740 | } | |
3f76745e | 5741 | } |
71dfc51f | 5742 | |
3f76745e JM |
5743 | for (c = die->die_child; c != NULL; c = c->die_sib) |
5744 | output_die (c); | |
71dfc51f | 5745 | |
3f76745e | 5746 | if (die->die_child != NULL) |
7e23cb16 | 5747 | { |
556273e0 | 5748 | /* Add null byte to terminate sibling list. */ |
2e4b9b8c RH |
5749 | dw2_asm_output_data (1, 0, "end of children of DIE 0x%lx", |
5750 | die->die_offset); | |
7e23cb16 | 5751 | } |
3f76745e | 5752 | } |
71dfc51f | 5753 | |
3f76745e JM |
5754 | /* Output the compilation unit that appears at the beginning of the |
5755 | .debug_info section, and precedes the DIE descriptions. */ | |
71dfc51f | 5756 | |
3f76745e JM |
5757 | static void |
5758 | output_compilation_unit_header () | |
5759 | { | |
2e4b9b8c RH |
5760 | dw2_asm_output_data (DWARF_OFFSET_SIZE, next_die_offset - DWARF_OFFSET_SIZE, |
5761 | "Length of Compilation Unit Info"); | |
71dfc51f | 5762 | |
2e4b9b8c | 5763 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF version number"); |
71dfc51f | 5764 | |
2e4b9b8c RH |
5765 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, abbrev_section_label, |
5766 | "Offset Into Abbrev. Section"); | |
71dfc51f | 5767 | |
2e4b9b8c | 5768 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Pointer Size (in bytes)"); |
a3f97cbb JW |
5769 | } |
5770 | ||
881c6935 JM |
5771 | /* Output the compilation unit DIE and its children. */ |
5772 | ||
5773 | static void | |
5774 | output_comp_unit (die) | |
5775 | dw_die_ref die; | |
5776 | { | |
ce1cc601 | 5777 | const char *secname; |
881c6935 JM |
5778 | |
5779 | if (die->die_child == 0) | |
5780 | return; | |
5781 | ||
1bfb5f8f JM |
5782 | /* Mark all the DIEs in this CU so we know which get local refs. */ |
5783 | mark_dies (die); | |
5784 | ||
5785 | build_abbrev_table (die); | |
5786 | ||
881c6935 JM |
5787 | /* Initialize the beginning DIE offset - and calculate sizes/offsets. */ |
5788 | next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE; | |
5789 | calc_die_sizes (die); | |
5790 | ||
881c6935 JM |
5791 | if (die->die_symbol) |
5792 | { | |
ce1cc601 KG |
5793 | char *tmp = (char *) alloca (strlen (die->die_symbol) + 24); |
5794 | sprintf (tmp, ".gnu.linkonce.wi.%s", die->die_symbol); | |
5795 | secname = tmp; | |
881c6935 JM |
5796 | die->die_symbol = NULL; |
5797 | } | |
5798 | else | |
ce1cc601 | 5799 | secname = (const char *) DEBUG_INFO_SECTION; |
881c6935 JM |
5800 | |
5801 | /* Output debugging information. */ | |
881c6935 JM |
5802 | ASM_OUTPUT_SECTION (asm_out_file, secname); |
5803 | output_compilation_unit_header (); | |
5804 | output_die (die); | |
5805 | ||
1bfb5f8f JM |
5806 | /* Leave the marks on the main CU, so we can check them in |
5807 | output_pubnames. */ | |
881c6935 | 5808 | if (die->die_symbol) |
1bfb5f8f | 5809 | unmark_dies (die); |
881c6935 JM |
5810 | } |
5811 | ||
a1d7ffe3 JM |
5812 | /* The DWARF2 pubname for a nested thingy looks like "A::f". The output |
5813 | of decl_printable_name for C++ looks like "A::f(int)". Let's drop the | |
5814 | argument list, and maybe the scope. */ | |
5815 | ||
d560ee52 | 5816 | static const char * |
a1d7ffe3 JM |
5817 | dwarf2_name (decl, scope) |
5818 | tree decl; | |
5819 | int scope; | |
5820 | { | |
5821 | return (*decl_printable_name) (decl, scope ? 1 : 0); | |
5822 | } | |
5823 | ||
d291dd49 | 5824 | /* Add a new entry to .debug_pubnames if appropriate. */ |
71dfc51f | 5825 | |
d291dd49 JM |
5826 | static void |
5827 | add_pubname (decl, die) | |
5828 | tree decl; | |
5829 | dw_die_ref die; | |
5830 | { | |
5831 | pubname_ref p; | |
5832 | ||
5833 | if (! TREE_PUBLIC (decl)) | |
5834 | return; | |
5835 | ||
5836 | if (pubname_table_in_use == pubname_table_allocated) | |
5837 | { | |
5838 | pubname_table_allocated += PUBNAME_TABLE_INCREMENT; | |
5839 | pubname_table = (pubname_ref) xrealloc | |
5840 | (pubname_table, pubname_table_allocated * sizeof (pubname_entry)); | |
5841 | } | |
71dfc51f | 5842 | |
d291dd49 JM |
5843 | p = &pubname_table[pubname_table_in_use++]; |
5844 | p->die = die; | |
a1d7ffe3 JM |
5845 | |
5846 | p->name = xstrdup (dwarf2_name (decl, 1)); | |
d291dd49 JM |
5847 | } |
5848 | ||
a3f97cbb JW |
5849 | /* Output the public names table used to speed up access to externally |
5850 | visible names. For now, only generate entries for externally | |
5851 | visible procedures. */ | |
71dfc51f | 5852 | |
a3f97cbb JW |
5853 | static void |
5854 | output_pubnames () | |
5855 | { | |
d291dd49 | 5856 | register unsigned i; |
71dfc51f RK |
5857 | register unsigned long pubnames_length = size_of_pubnames (); |
5858 | ||
2e4b9b8c RH |
5859 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length, |
5860 | "Length of Public Names Info"); | |
71dfc51f | 5861 | |
2e4b9b8c | 5862 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
71dfc51f | 5863 | |
2e4b9b8c RH |
5864 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
5865 | "Offset of Compilation Unit Info"); | |
71dfc51f | 5866 | |
2e4b9b8c RH |
5867 | dw2_asm_output_data (DWARF_OFFSET_SIZE, next_die_offset, |
5868 | "Compilation Unit Length"); | |
71dfc51f | 5869 | |
d291dd49 | 5870 | for (i = 0; i < pubname_table_in_use; ++i) |
a3f97cbb | 5871 | { |
d291dd49 | 5872 | register pubname_ref pub = &pubname_table[i]; |
71dfc51f | 5873 | |
881c6935 | 5874 | /* We shouldn't see pubnames for DIEs outside of the main CU. */ |
1bfb5f8f | 5875 | if (pub->die->die_mark == 0) |
881c6935 JM |
5876 | abort (); |
5877 | ||
2e4b9b8c RH |
5878 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pub->die->die_offset, |
5879 | "DIE offset"); | |
71dfc51f | 5880 | |
2e4b9b8c | 5881 | dw2_asm_output_nstring (pub->name, -1, "external name"); |
a3f97cbb | 5882 | } |
71dfc51f | 5883 | |
2e4b9b8c | 5884 | dw2_asm_output_data (DWARF_OFFSET_SIZE, 0, NULL); |
a3f97cbb JW |
5885 | } |
5886 | ||
d291dd49 | 5887 | /* Add a new entry to .debug_aranges if appropriate. */ |
71dfc51f | 5888 | |
d291dd49 JM |
5889 | static void |
5890 | add_arange (decl, die) | |
5891 | tree decl; | |
5892 | dw_die_ref die; | |
5893 | { | |
5894 | if (! DECL_SECTION_NAME (decl)) | |
5895 | return; | |
5896 | ||
5897 | if (arange_table_in_use == arange_table_allocated) | |
5898 | { | |
5899 | arange_table_allocated += ARANGE_TABLE_INCREMENT; | |
71dfc51f RK |
5900 | arange_table |
5901 | = (arange_ref) xrealloc (arange_table, | |
5902 | arange_table_allocated * sizeof (dw_die_ref)); | |
d291dd49 | 5903 | } |
71dfc51f | 5904 | |
d291dd49 JM |
5905 | arange_table[arange_table_in_use++] = die; |
5906 | } | |
5907 | ||
a3f97cbb JW |
5908 | /* Output the information that goes into the .debug_aranges table. |
5909 | Namely, define the beginning and ending address range of the | |
5910 | text section generated for this compilation unit. */ | |
71dfc51f | 5911 | |
a3f97cbb JW |
5912 | static void |
5913 | output_aranges () | |
5914 | { | |
d291dd49 | 5915 | register unsigned i; |
71dfc51f RK |
5916 | register unsigned long aranges_length = size_of_aranges (); |
5917 | ||
2e4b9b8c RH |
5918 | dw2_asm_output_data (DWARF_OFFSET_SIZE, aranges_length, |
5919 | "Length of Address Ranges Info"); | |
71dfc51f | 5920 | |
2e4b9b8c | 5921 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
71dfc51f | 5922 | |
2e4b9b8c RH |
5923 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
5924 | "Offset of Compilation Unit Info"); | |
71dfc51f | 5925 | |
2e4b9b8c | 5926 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Size of Address"); |
71dfc51f | 5927 | |
2e4b9b8c | 5928 | dw2_asm_output_data (1, 0, "Size of Segment Descriptor"); |
71dfc51f | 5929 | |
262b6384 SC |
5930 | /* We need to align to twice the pointer size here. */ |
5931 | if (DWARF_ARANGES_PAD_SIZE) | |
5932 | { | |
2e4b9b8c RH |
5933 | /* Pad using a 2 byte words so that padding is correct for any |
5934 | pointer size. */ | |
5935 | dw2_asm_output_data (2, 0, "Pad to %d byte boundary", | |
5936 | 2 * DWARF2_ADDR_SIZE); | |
770ca8c6 | 5937 | for (i = 2; i < (unsigned) DWARF_ARANGES_PAD_SIZE; i += 2) |
2e4b9b8c | 5938 | dw2_asm_output_data (2, 0, NULL); |
262b6384 | 5939 | } |
71dfc51f | 5940 | |
2e4b9b8c RH |
5941 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, text_section_label, "Address"); |
5942 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label, | |
5943 | text_section_label, "Length"); | |
71dfc51f | 5944 | |
d291dd49 JM |
5945 | for (i = 0; i < arange_table_in_use; ++i) |
5946 | { | |
e689ae67 | 5947 | dw_die_ref die = arange_table[i]; |
71dfc51f | 5948 | |
881c6935 | 5949 | /* We shouldn't see aranges for DIEs outside of the main CU. */ |
1bfb5f8f | 5950 | if (die->die_mark == 0) |
881c6935 JM |
5951 | abort (); |
5952 | ||
e689ae67 | 5953 | if (die->die_tag == DW_TAG_subprogram) |
2e4b9b8c RH |
5954 | { |
5955 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, get_AT_low_pc (die), | |
5956 | "Address"); | |
5957 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, get_AT_hi_pc (die), | |
5958 | get_AT_low_pc (die), "Length"); | |
5959 | } | |
d291dd49 | 5960 | else |
a1d7ffe3 | 5961 | { |
e689ae67 JM |
5962 | /* A static variable; extract the symbol from DW_AT_location. |
5963 | Note that this code isn't currently hit, as we only emit | |
5964 | aranges for functions (jason 9/23/99). */ | |
71dfc51f | 5965 | |
e689ae67 JM |
5966 | dw_attr_ref a = get_AT (die, DW_AT_location); |
5967 | dw_loc_descr_ref loc; | |
a96c67ec | 5968 | if (! a || AT_class (a) != dw_val_class_loc) |
e689ae67 JM |
5969 | abort (); |
5970 | ||
a96c67ec | 5971 | loc = AT_loc (a); |
e689ae67 JM |
5972 | if (loc->dw_loc_opc != DW_OP_addr) |
5973 | abort (); | |
5974 | ||
2e4b9b8c RH |
5975 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, |
5976 | loc->dw_loc_oprnd1.v.val_addr, "Address"); | |
5977 | dw2_asm_output_data (DWARF2_ADDR_SIZE, | |
5978 | get_AT_unsigned (die, DW_AT_byte_size), | |
5979 | "Length"); | |
a1d7ffe3 | 5980 | } |
d291dd49 | 5981 | } |
71dfc51f | 5982 | |
a3f97cbb | 5983 | /* Output the terminator words. */ |
2e4b9b8c RH |
5984 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); |
5985 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
a3f97cbb JW |
5986 | } |
5987 | ||
0b34cf1e UD |
5988 | |
5989 | /* Data structure containing information about input files. */ | |
5990 | struct file_info | |
5991 | { | |
5992 | char *path; /* Complete file name. */ | |
5993 | char *fname; /* File name part. */ | |
5994 | int length; /* Length of entire string. */ | |
5995 | int file_idx; /* Index in input file table. */ | |
5996 | int dir_idx; /* Index in directory table. */ | |
5997 | }; | |
5998 | ||
5999 | /* Data structure containing information about directories with source | |
6000 | files. */ | |
6001 | struct dir_info | |
6002 | { | |
6003 | char *path; /* Path including directory name. */ | |
6004 | int length; /* Path length. */ | |
6005 | int prefix; /* Index of directory entry which is a prefix. */ | |
6006 | int nbytes; /* Total number of bytes in all file names excluding | |
6007 | paths. */ | |
6008 | int count; /* Number of files in this directory. */ | |
6009 | int dir_idx; /* Index of directory used as base. */ | |
6010 | int used; /* Used in the end? */ | |
6011 | }; | |
6012 | ||
6013 | /* Callback function for file_info comparison. We sort by looking at | |
6014 | the directories in the path. */ | |
6015 | static int | |
6016 | file_info_cmp (p1, p2) | |
6017 | const void *p1; | |
6018 | const void *p2; | |
6019 | { | |
6020 | const struct file_info *s1 = p1; | |
6021 | const struct file_info *s2 = p2; | |
6022 | unsigned char *cp1; | |
6023 | unsigned char *cp2; | |
6024 | ||
6025 | /* Take care of file names without directories. */ | |
6026 | if (s1->path == s1->fname) | |
6027 | return -1; | |
6028 | else if (s2->path == s2->fname) | |
6029 | return 1; | |
6030 | ||
6031 | cp1 = (unsigned char *) s1->path; | |
6032 | cp2 = (unsigned char *) s2->path; | |
6033 | ||
6034 | while (1) | |
6035 | { | |
6036 | ++cp1; | |
6037 | ++cp2; | |
6038 | /* Reached the end of the first path? */ | |
6039 | if (cp1 == (unsigned char *) s1->fname) | |
6040 | /* It doesn't really matter in which order files from the | |
6041 | same directory are sorted in. Therefore don't test for | |
6042 | the second path reaching the end. */ | |
6043 | return -1; | |
6044 | else if (cp2 == (unsigned char *) s2->fname) | |
6045 | return 1; | |
6046 | ||
6047 | /* Character of current path component the same? */ | |
6048 | if (*cp1 != *cp2) | |
6049 | return *cp1 - *cp2; | |
6050 | } | |
6051 | } | |
6052 | ||
e57cabac UD |
6053 | /* Compute the maximum prefix of P2 appearing also in P1. Entire |
6054 | directory names must match. */ | |
6055 | static int prefix_of PARAMS ((struct dir_info *, struct dir_info *)); | |
6056 | static int | |
6057 | prefix_of (p1, p2) | |
6058 | struct dir_info *p1; | |
6059 | struct dir_info *p2; | |
6060 | { | |
6061 | char *s1 = p1->path; | |
6062 | char *s2 = p2->path; | |
6063 | int len = p1->length < p2->length ? p1->length : p2->length; | |
6064 | ||
6065 | while (*s1 == *s2 && s1 < p1->path + len) | |
6066 | ++s1, ++s2; | |
6067 | ||
6068 | if (*s1 == '/' && *s2 == '/') | |
6069 | /* The whole of P1 is the prefix. */ | |
6070 | return p1->length; | |
6071 | ||
6072 | /* Go back to the last directory component. */ | |
6073 | while (s1 > p1->path) | |
6074 | if (*--s1 == '/') | |
6075 | return s1 - p1->path + 1; | |
6076 | ||
6077 | return 0; | |
6078 | } | |
6079 | ||
0b34cf1e UD |
6080 | /* Output the directory table and the file name table. We try to minimize |
6081 | the total amount of memory needed. A heuristic is used to avoid large | |
6082 | slowdowns with many input files. */ | |
6083 | static void | |
6084 | output_file_names () | |
6085 | { | |
6086 | struct file_info *files; | |
6087 | struct dir_info *dirs; | |
6088 | int *saved; | |
6089 | int *savehere; | |
6090 | int *backmap; | |
6091 | int ndirs; | |
6092 | int idx_offset; | |
6093 | int i; | |
6094 | int idx; | |
6095 | ||
6096 | /* Allocate the various arrays we need. */ | |
6097 | files = (struct file_info *) alloca (line_file_table.in_use | |
6098 | * sizeof (struct file_info)); | |
e57cabac | 6099 | dirs = (struct dir_info *) alloca (line_file_table.in_use * 2 |
0b34cf1e UD |
6100 | * sizeof (struct dir_info)); |
6101 | ||
6102 | /* Sort the file names. */ | |
6103 | for (i = 1; i < (int) line_file_table.in_use; ++i) | |
6104 | { | |
6105 | char *f; | |
6106 | ||
6107 | /* Skip all leading "./". */ | |
6108 | f = line_file_table.table[i]; | |
6109 | while (f[0] == '.' && f[1] == '/') | |
6110 | f += 2; | |
6111 | ||
6112 | /* Create a new array entry. */ | |
6113 | files[i].path = f; | |
6114 | files[i].length = strlen (f); | |
6115 | files[i].file_idx = i; | |
6116 | ||
6117 | /* Search for the file name part. */ | |
6118 | f = strrchr (f, '/'); | |
6119 | files[i].fname = f == NULL ? files[i].path : f + 1; | |
6120 | } | |
6121 | qsort (files + 1, line_file_table.in_use - 1, sizeof (files[0]), | |
6122 | file_info_cmp); | |
6123 | ||
6124 | /* Find all the different directories used. */ | |
6125 | dirs[0].path = files[1].path; | |
6126 | dirs[0].length = files[1].fname - files[1].path; | |
6127 | dirs[0].prefix = -1; | |
6128 | dirs[0].nbytes = files[1].length - dirs[1].length + 1; | |
6129 | dirs[0].count = 1; | |
6130 | dirs[0].dir_idx = 0; | |
6131 | dirs[0].used = 0; | |
6132 | files[1].dir_idx = 0; | |
6133 | ndirs = 1; | |
6134 | ||
6135 | for (i = 2; i < (int) line_file_table.in_use; ++i) | |
6136 | if (files[i].fname - files[i].path == dirs[ndirs - 1].length | |
6137 | && memcmp (dirs[ndirs - 1].path, files[i].path, | |
6138 | dirs[ndirs - 1].length) == 0) | |
6139 | { | |
6140 | /* Same directory as last entry. */ | |
6141 | files[i].dir_idx = ndirs - 1; | |
6142 | dirs[ndirs - 1].nbytes += files[i].length - dirs[ndirs - 1].length + 1; | |
6143 | ++dirs[ndirs - 1].count; | |
6144 | } | |
6145 | else | |
6146 | { | |
6147 | int j; | |
e57cabac UD |
6148 | int max_idx; |
6149 | int max_len; | |
0b34cf1e UD |
6150 | |
6151 | /* This is a new directory. */ | |
6152 | dirs[ndirs].path = files[i].path; | |
6153 | dirs[ndirs].length = files[i].fname - files[i].path; | |
6154 | dirs[ndirs].nbytes = files[i].length - dirs[i].length + 1; | |
6155 | dirs[ndirs].count = 1; | |
6156 | dirs[ndirs].dir_idx = ndirs; | |
6157 | dirs[ndirs].used = 0; | |
6158 | files[i].dir_idx = ndirs; | |
6159 | ||
6160 | /* Search for a prefix. */ | |
e57cabac UD |
6161 | max_len = 0; |
6162 | max_idx = 0; | |
0b34cf1e | 6163 | for (j = 0; j < ndirs; ++j) |
e57cabac UD |
6164 | if (dirs[j].length > max_len) |
6165 | { | |
6166 | int this_len = prefix_of (&dirs[j], &dirs[ndirs]); | |
6167 | ||
6168 | if (this_len > max_len) | |
6169 | { | |
6170 | max_len = this_len; | |
6171 | max_idx = j; | |
6172 | } | |
6173 | } | |
6174 | ||
6175 | /* Remember the prefix. If this is a known prefix simply | |
6176 | remember the index. Otherwise we will have to create an | |
6177 | artificial entry. */ | |
6178 | if (max_len == dirs[max_idx].length) | |
6179 | /* This is our prefix. */ | |
6180 | dirs[ndirs].prefix = max_idx; | |
6181 | else if (max_len > 0) | |
6182 | { | |
6183 | /* Create an entry without associated file. Since we have | |
6184 | to keep the dirs array sorted (means, entries with paths | |
6185 | which come first) we have to move the new entry in the | |
6186 | place of the old one. */ | |
6187 | dirs[++ndirs] = dirs[max_idx]; | |
6188 | ||
6189 | /* We don't have to set .path. */ | |
6190 | dirs[max_idx].length = max_len; | |
6191 | dirs[max_idx].nbytes = 0; | |
6192 | dirs[max_idx].count = 0; | |
6193 | dirs[max_idx].dir_idx = ndirs; | |
6194 | dirs[max_idx].used = 0; | |
6195 | dirs[max_idx].prefix = dirs[ndirs].prefix; | |
6196 | ||
6197 | dirs[ndirs - 1].prefix = dirs[ndirs].prefix = max_idx; | |
6198 | } | |
6199 | else | |
6200 | dirs[ndirs].prefix = -1; | |
0b34cf1e UD |
6201 | |
6202 | ++ndirs; | |
6203 | } | |
6204 | ||
6205 | /* Now to the actual work. We have to find a subset of the | |
6206 | directories which allow expressing the file name using references | |
6207 | to the directory table with the least amount of characters. We | |
6208 | do not do an exhaustive search where we would have to check out | |
6209 | every combination of every single possible prefix. Instead we | |
6210 | use a heuristic which provides nearly optimal results in most | |
6211 | cases and never is much off. */ | |
6212 | saved = (int *) alloca (ndirs * sizeof (int)); | |
6213 | savehere = (int *) alloca (ndirs * sizeof (int)); | |
6214 | ||
6215 | memset (saved, '\0', ndirs * sizeof (saved[0])); | |
6216 | for (i = 0; i < ndirs; ++i) | |
6217 | { | |
6218 | int j; | |
6219 | int total; | |
6220 | ||
6221 | /* We can always safe some space for the current directory. But | |
6222 | this does not mean it will be enough to justify adding the | |
6223 | directory. */ | |
6224 | savehere[i] = dirs[i].length; | |
6225 | total = (savehere[i] - saved[i]) * dirs[i].count; | |
6226 | ||
6227 | for (j = i + 1; j < ndirs; ++j) | |
6228 | { | |
6229 | savehere[j] = 0; | |
6230 | ||
6231 | if (saved[j] < dirs[i].length) | |
6232 | { | |
6233 | /* Determine whether the dirs[i] path is a prefix of the | |
6234 | dirs[j] path. */ | |
6235 | int k; | |
6236 | ||
6237 | k = dirs[j].prefix; | |
6238 | while (k != -1 && k != i) | |
6239 | k = dirs[k].prefix; | |
6240 | ||
6241 | if (k == i) | |
6242 | { | |
6243 | /* Yes it is. We can possibly safe some memory but | |
6244 | writing the filenames in dirs[j] relative to | |
6245 | dirs[i]. */ | |
6246 | savehere[j] = dirs[i].length; | |
6247 | total += (savehere[j] - saved[j]) * dirs[j].count; | |
6248 | } | |
6249 | } | |
6250 | } | |
6251 | ||
6252 | /* Check whether we can safe enough to justify adding the dirs[i] | |
6253 | directory. */ | |
6254 | if (total > dirs[i].length + 1) | |
6255 | { | |
6256 | /* It's worthwhile adding. */ | |
6257 | for (j = i; j < ndirs; ++j) | |
6258 | if (savehere[j] > 0) | |
6259 | { | |
6260 | /* Remember how much we saved for this directory so far. */ | |
6261 | saved[j] = savehere[j]; | |
6262 | ||
6263 | /* Remember the prefix directory. */ | |
6264 | dirs[j].dir_idx = i; | |
6265 | } | |
6266 | } | |
6267 | } | |
6268 | ||
6269 | /* We have to emit them in the order they appear in the line_file_table | |
6270 | array since the index is used in the debug info generation. To | |
6271 | do this efficiently we generate a back-mapping of the indices | |
6272 | first. */ | |
6273 | backmap = (int *) alloca (line_file_table.in_use * sizeof (int)); | |
6274 | for (i = 1; i < (int) line_file_table.in_use; ++i) | |
6275 | { | |
6276 | backmap[files[i].file_idx] = i; | |
6277 | /* Mark this directory as used. */ | |
6278 | dirs[dirs[files[i].dir_idx].dir_idx].used = 1; | |
6279 | } | |
6280 | ||
6281 | /* That was it. We are ready to emit the information. First the | |
6282 | directory name table. Here we have to make sure that the first | |
6283 | actually emitted directory name has the index one. Zero is | |
6284 | reserved for the current working directory. Make sure we do not | |
6285 | confuse these indices with the one for the constructed table | |
6286 | (even though most of the time they are identical). */ | |
6287 | idx = 1; | |
e57cabac | 6288 | idx_offset = dirs[0].length > 0 ? 1 : 0; |
0b34cf1e UD |
6289 | for (i = 1 - idx_offset; i < ndirs; ++i) |
6290 | if (dirs[i].used != 0) | |
6291 | { | |
6292 | dirs[i].used = idx++; | |
2e4b9b8c RH |
6293 | dw2_asm_output_nstring (dirs[i].path, dirs[i].length - 1, |
6294 | "Directory Entry: 0x%x", dirs[i].used); | |
0b34cf1e | 6295 | } |
2e4b9b8c RH |
6296 | dw2_asm_output_data (1, 0, "End directory table"); |
6297 | ||
0b34cf1e UD |
6298 | /* Correct the index for the current working directory entry if it |
6299 | exists. */ | |
6300 | if (idx_offset == 0) | |
6301 | dirs[0].used = 0; | |
0b34cf1e UD |
6302 | |
6303 | /* Now write all the file names. */ | |
6304 | for (i = 1; i < (int) line_file_table.in_use; ++i) | |
6305 | { | |
6306 | int file_idx = backmap[i]; | |
6307 | int dir_idx = dirs[files[file_idx].dir_idx].dir_idx; | |
6308 | ||
2e4b9b8c RH |
6309 | dw2_asm_output_nstring (files[file_idx].path + dirs[dir_idx].length, -1, |
6310 | "File Entry: 0x%x", i); | |
0b34cf1e UD |
6311 | |
6312 | /* Include directory index. */ | |
2e4b9b8c | 6313 | dw2_asm_output_data_uleb128 (dirs[dir_idx].used, NULL); |
0b34cf1e UD |
6314 | |
6315 | /* Modification time. */ | |
2e4b9b8c | 6316 | dw2_asm_output_data_uleb128 (0, NULL); |
0b34cf1e UD |
6317 | |
6318 | /* File length in bytes. */ | |
2e4b9b8c | 6319 | dw2_asm_output_data_uleb128 (0, NULL); |
0b34cf1e | 6320 | } |
2e4b9b8c | 6321 | dw2_asm_output_data (1, 0, "End file name table"); |
0b34cf1e UD |
6322 | } |
6323 | ||
6324 | ||
a3f97cbb | 6325 | /* Output the source line number correspondence information. This |
14a774a9 | 6326 | information goes into the .debug_line section. */ |
71dfc51f | 6327 | |
a3f97cbb JW |
6328 | static void |
6329 | output_line_info () | |
6330 | { | |
2e4b9b8c | 6331 | char l1[20], l2[20]; |
a3f97cbb JW |
6332 | char line_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
6333 | char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
6334 | register unsigned opc; | |
6335 | register unsigned n_op_args; | |
a3f97cbb JW |
6336 | register unsigned long lt_index; |
6337 | register unsigned long current_line; | |
6338 | register long line_offset; | |
6339 | register long line_delta; | |
6340 | register unsigned long current_file; | |
e90b62db | 6341 | register unsigned long function; |
71dfc51f | 6342 | |
2e4b9b8c RH |
6343 | ASM_GENERATE_INTERNAL_LABEL (l1, LINE_NUMBER_BEGIN_LABEL, 0); |
6344 | ASM_GENERATE_INTERNAL_LABEL (l2, LINE_NUMBER_END_LABEL, 0); | |
71dfc51f | 6345 | |
2e4b9b8c RH |
6346 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, l2, l1, |
6347 | "Length of Source Line Info"); | |
6348 | ASM_OUTPUT_LABEL (asm_out_file, l1); | |
71dfc51f | 6349 | |
2e4b9b8c | 6350 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
71dfc51f | 6351 | |
2e4b9b8c RH |
6352 | dw2_asm_output_data (DWARF_OFFSET_SIZE, size_of_line_prolog (), |
6353 | "Prolog Length"); | |
71dfc51f | 6354 | |
2e4b9b8c RH |
6355 | dw2_asm_output_data (1, DWARF_LINE_MIN_INSTR_LENGTH, |
6356 | "Minimum Instruction Length"); | |
71dfc51f | 6357 | |
2e4b9b8c RH |
6358 | dw2_asm_output_data (1, DWARF_LINE_DEFAULT_IS_STMT_START, |
6359 | "Default is_stmt_start flag"); | |
71dfc51f | 6360 | |
2e4b9b8c RH |
6361 | dw2_asm_output_data (1, DWARF_LINE_BASE, |
6362 | "Line Base Value (Special Opcodes)"); | |
71dfc51f | 6363 | |
2e4b9b8c RH |
6364 | dw2_asm_output_data (1, DWARF_LINE_RANGE, |
6365 | "Line Range Value (Special Opcodes)"); | |
6366 | ||
6367 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE, | |
6368 | "Special Opcode Base"); | |
71dfc51f | 6369 | |
a3f97cbb JW |
6370 | for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc) |
6371 | { | |
6372 | switch (opc) | |
6373 | { | |
6374 | case DW_LNS_advance_pc: | |
6375 | case DW_LNS_advance_line: | |
6376 | case DW_LNS_set_file: | |
6377 | case DW_LNS_set_column: | |
6378 | case DW_LNS_fixed_advance_pc: | |
6379 | n_op_args = 1; | |
6380 | break; | |
6381 | default: | |
6382 | n_op_args = 0; | |
6383 | break; | |
6384 | } | |
2e4b9b8c RH |
6385 | |
6386 | dw2_asm_output_data (1, n_op_args, "opcode: 0x%x has %d args", | |
6387 | opc, n_op_args); | |
a3f97cbb | 6388 | } |
71dfc51f | 6389 | |
0b34cf1e UD |
6390 | /* Write out the information about the files we use. */ |
6391 | output_file_names (); | |
a3f97cbb | 6392 | |
2f22d404 JM |
6393 | /* We used to set the address register to the first location in the text |
6394 | section here, but that didn't accomplish anything since we already | |
6395 | have a line note for the opening brace of the first function. */ | |
a3f97cbb JW |
6396 | |
6397 | /* Generate the line number to PC correspondence table, encoded as | |
6398 | a series of state machine operations. */ | |
6399 | current_file = 1; | |
6400 | current_line = 1; | |
8b790721 | 6401 | strcpy (prev_line_label, text_section_label); |
a3f97cbb JW |
6402 | for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index) |
6403 | { | |
2f22d404 JM |
6404 | register dw_line_info_ref line_info = &line_info_table[lt_index]; |
6405 | ||
10a11b75 JM |
6406 | #if 0 |
6407 | /* Disable this optimization for now; GDB wants to see two line notes | |
6408 | at the beginning of a function so it can find the end of the | |
6409 | prologue. */ | |
6410 | ||
2f22d404 JM |
6411 | /* Don't emit anything for redundant notes. Just updating the |
6412 | address doesn't accomplish anything, because we already assume | |
6413 | that anything after the last address is this line. */ | |
6414 | if (line_info->dw_line_num == current_line | |
6415 | && line_info->dw_file_num == current_file) | |
6416 | continue; | |
10a11b75 | 6417 | #endif |
71dfc51f | 6418 | |
2e4b9b8c RH |
6419 | /* Emit debug info for the address of the current line. |
6420 | ||
6421 | Unfortunately, we have little choice here currently, and must always | |
6422 | use the most general form. Gcc does not know the address delta | |
6423 | itself, so we can't use DW_LNS_advance_pc. Many ports do have length | |
6424 | attributes which will give an upper bound on the address range. We | |
6425 | could perhaps use length attributes to determine when it is safe to | |
6426 | use DW_LNS_fixed_advance_pc. */ | |
6427 | ||
5c90448c | 6428 | ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index); |
f19a6894 JW |
6429 | if (0) |
6430 | { | |
6431 | /* This can handle deltas up to 0xffff. This takes 3 bytes. */ | |
2e4b9b8c RH |
6432 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
6433 | "DW_LNS_fixed_advance_pc"); | |
6434 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
6435 | } |
6436 | else | |
6437 | { | |
a1a4189d JB |
6438 | /* This can handle any delta. This takes |
6439 | 4+DWARF2_ADDR_SIZE bytes. */ | |
2e4b9b8c RH |
6440 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
6441 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
6442 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
6443 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, line_label, NULL); | |
f19a6894 JW |
6444 | } |
6445 | strcpy (prev_line_label, line_label); | |
6446 | ||
6447 | /* Emit debug info for the source file of the current line, if | |
6448 | different from the previous line. */ | |
a3f97cbb JW |
6449 | if (line_info->dw_file_num != current_file) |
6450 | { | |
6451 | current_file = line_info->dw_file_num; | |
2e4b9b8c RH |
6452 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
6453 | dw2_asm_output_data_uleb128 (current_file, "(\"%s\")", | |
6454 | line_file_table.table[current_file]); | |
a3f97cbb | 6455 | } |
71dfc51f | 6456 | |
f19a6894 JW |
6457 | /* Emit debug info for the current line number, choosing the encoding |
6458 | that uses the least amount of space. */ | |
2f22d404 | 6459 | if (line_info->dw_line_num != current_line) |
a3f97cbb | 6460 | { |
2f22d404 JM |
6461 | line_offset = line_info->dw_line_num - current_line; |
6462 | line_delta = line_offset - DWARF_LINE_BASE; | |
6463 | current_line = line_info->dw_line_num; | |
6464 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
6465 | { | |
6466 | /* This can handle deltas from -10 to 234, using the current | |
6467 | definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This | |
6468 | takes 1 byte. */ | |
2e4b9b8c RH |
6469 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, |
6470 | "line %lu", current_line); | |
2f22d404 JM |
6471 | } |
6472 | else | |
6473 | { | |
6474 | /* This can handle any delta. This takes at least 4 bytes, | |
6475 | depending on the value being encoded. */ | |
2e4b9b8c RH |
6476 | dw2_asm_output_data (1, DW_LNS_advance_line, |
6477 | "advance to line %lu", current_line); | |
6478 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
6479 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
2f22d404 | 6480 | } |
a94dbf2c JM |
6481 | } |
6482 | else | |
6483 | { | |
2f22d404 | 6484 | /* We still need to start a new row, so output a copy insn. */ |
2e4b9b8c | 6485 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); |
a3f97cbb | 6486 | } |
a3f97cbb JW |
6487 | } |
6488 | ||
f19a6894 JW |
6489 | /* Emit debug info for the address of the end of the function. */ |
6490 | if (0) | |
6491 | { | |
2e4b9b8c RH |
6492 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
6493 | "DW_LNS_fixed_advance_pc"); | |
6494 | dw2_asm_output_delta (2, text_end_label, prev_line_label, NULL); | |
f19a6894 JW |
6495 | } |
6496 | else | |
6497 | { | |
2e4b9b8c RH |
6498 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
6499 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
6500 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
6501 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, text_end_label, NULL); | |
f19a6894 | 6502 | } |
bdb669cb | 6503 | |
2e4b9b8c RH |
6504 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
6505 | dw2_asm_output_data_uleb128 (1, NULL); | |
6506 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
e90b62db JM |
6507 | |
6508 | function = 0; | |
6509 | current_file = 1; | |
6510 | current_line = 1; | |
556273e0 | 6511 | for (lt_index = 0; lt_index < separate_line_info_table_in_use;) |
e90b62db JM |
6512 | { |
6513 | register dw_separate_line_info_ref line_info | |
6514 | = &separate_line_info_table[lt_index]; | |
71dfc51f | 6515 | |
10a11b75 | 6516 | #if 0 |
2f22d404 JM |
6517 | /* Don't emit anything for redundant notes. */ |
6518 | if (line_info->dw_line_num == current_line | |
6519 | && line_info->dw_file_num == current_file | |
6520 | && line_info->function == function) | |
6521 | goto cont; | |
10a11b75 | 6522 | #endif |
2f22d404 | 6523 | |
f19a6894 JW |
6524 | /* Emit debug info for the address of the current line. If this is |
6525 | a new function, or the first line of a function, then we need | |
6526 | to handle it differently. */ | |
5c90448c JM |
6527 | ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL, |
6528 | lt_index); | |
e90b62db JM |
6529 | if (function != line_info->function) |
6530 | { | |
6531 | function = line_info->function; | |
71dfc51f | 6532 | |
e90b62db | 6533 | /* Set the address register to the first line in the function */ |
2e4b9b8c RH |
6534 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
6535 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
6536 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
6537 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, line_label, NULL); | |
e90b62db JM |
6538 | } |
6539 | else | |
6540 | { | |
f19a6894 JW |
6541 | /* ??? See the DW_LNS_advance_pc comment above. */ |
6542 | if (0) | |
6543 | { | |
2e4b9b8c RH |
6544 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
6545 | "DW_LNS_fixed_advance_pc"); | |
6546 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
6547 | } |
6548 | else | |
6549 | { | |
2e4b9b8c RH |
6550 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
6551 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
6552 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
6553 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, line_label, NULL); | |
f19a6894 | 6554 | } |
e90b62db | 6555 | } |
f19a6894 | 6556 | strcpy (prev_line_label, line_label); |
71dfc51f | 6557 | |
f19a6894 JW |
6558 | /* Emit debug info for the source file of the current line, if |
6559 | different from the previous line. */ | |
e90b62db JM |
6560 | if (line_info->dw_file_num != current_file) |
6561 | { | |
6562 | current_file = line_info->dw_file_num; | |
2e4b9b8c RH |
6563 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
6564 | dw2_asm_output_data_uleb128 (current_file, "(\"%s\")", | |
6565 | line_file_table.table[current_file]); | |
e90b62db | 6566 | } |
71dfc51f | 6567 | |
f19a6894 JW |
6568 | /* Emit debug info for the current line number, choosing the encoding |
6569 | that uses the least amount of space. */ | |
e90b62db JM |
6570 | if (line_info->dw_line_num != current_line) |
6571 | { | |
6572 | line_offset = line_info->dw_line_num - current_line; | |
6573 | line_delta = line_offset - DWARF_LINE_BASE; | |
6574 | current_line = line_info->dw_line_num; | |
6575 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
2e4b9b8c RH |
6576 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, |
6577 | "line %lu", current_line); | |
e90b62db JM |
6578 | else |
6579 | { | |
2e4b9b8c RH |
6580 | dw2_asm_output_data (1, DW_LNS_advance_line, |
6581 | "advance to line %lu", current_line); | |
6582 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
6583 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
e90b62db JM |
6584 | } |
6585 | } | |
2f22d404 | 6586 | else |
2e4b9b8c | 6587 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); |
71dfc51f | 6588 | |
10a11b75 | 6589 | #if 0 |
2f22d404 | 6590 | cont: |
10a11b75 | 6591 | #endif |
e90b62db | 6592 | ++lt_index; |
e90b62db JM |
6593 | |
6594 | /* If we're done with a function, end its sequence. */ | |
6595 | if (lt_index == separate_line_info_table_in_use | |
6596 | || separate_line_info_table[lt_index].function != function) | |
6597 | { | |
6598 | current_file = 1; | |
6599 | current_line = 1; | |
71dfc51f | 6600 | |
f19a6894 | 6601 | /* Emit debug info for the address of the end of the function. */ |
5c90448c | 6602 | ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function); |
f19a6894 JW |
6603 | if (0) |
6604 | { | |
2e4b9b8c RH |
6605 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
6606 | "DW_LNS_fixed_advance_pc"); | |
6607 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
6608 | } |
6609 | else | |
6610 | { | |
2e4b9b8c RH |
6611 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
6612 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
6613 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
6614 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, line_label, NULL); | |
f19a6894 | 6615 | } |
e90b62db JM |
6616 | |
6617 | /* Output the marker for the end of this sequence. */ | |
2e4b9b8c RH |
6618 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
6619 | dw2_asm_output_data_uleb128 (1, NULL); | |
6620 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
e90b62db JM |
6621 | } |
6622 | } | |
f19f17e0 JM |
6623 | |
6624 | /* Output the marker for the end of the line number info. */ | |
2e4b9b8c | 6625 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
a3f97cbb JW |
6626 | } |
6627 | \f | |
a3f97cbb JW |
6628 | /* Given a pointer to a tree node for some base type, return a pointer to |
6629 | a DIE that describes the given type. | |
6630 | ||
6631 | This routine must only be called for GCC type nodes that correspond to | |
6632 | Dwarf base (fundamental) types. */ | |
71dfc51f | 6633 | |
a3f97cbb JW |
6634 | static dw_die_ref |
6635 | base_type_die (type) | |
6636 | register tree type; | |
6637 | { | |
a9d38797 | 6638 | register dw_die_ref base_type_result; |
ec0ce6e2 | 6639 | register const char *type_name; |
a9d38797 | 6640 | register enum dwarf_type encoding; |
71dfc51f | 6641 | register tree name = TYPE_NAME (type); |
a3f97cbb | 6642 | |
a9d38797 JM |
6643 | if (TREE_CODE (type) == ERROR_MARK |
6644 | || TREE_CODE (type) == VOID_TYPE) | |
a3f97cbb JW |
6645 | return 0; |
6646 | ||
405f63da MM |
6647 | if (name) |
6648 | { | |
6649 | if (TREE_CODE (name) == TYPE_DECL) | |
6650 | name = DECL_NAME (name); | |
6651 | ||
6652 | type_name = IDENTIFIER_POINTER (name); | |
6653 | } | |
6654 | else | |
6655 | type_name = "__unknown__"; | |
a9d38797 | 6656 | |
a3f97cbb JW |
6657 | switch (TREE_CODE (type)) |
6658 | { | |
a3f97cbb | 6659 | case INTEGER_TYPE: |
a9d38797 | 6660 | /* Carefully distinguish the C character types, without messing |
a3f97cbb | 6661 | up if the language is not C. Note that we check only for the names |
556273e0 | 6662 | that contain spaces; other names might occur by coincidence in other |
a3f97cbb | 6663 | languages. */ |
a9d38797 JM |
6664 | if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE |
6665 | && (type == char_type_node | |
6666 | || ! strcmp (type_name, "signed char") | |
6667 | || ! strcmp (type_name, "unsigned char")))) | |
a3f97cbb | 6668 | { |
a9d38797 JM |
6669 | if (TREE_UNSIGNED (type)) |
6670 | encoding = DW_ATE_unsigned; | |
6671 | else | |
6672 | encoding = DW_ATE_signed; | |
6673 | break; | |
a3f97cbb | 6674 | } |
556273e0 | 6675 | /* else fall through. */ |
a3f97cbb | 6676 | |
a9d38797 JM |
6677 | case CHAR_TYPE: |
6678 | /* GNU Pascal/Ada CHAR type. Not used in C. */ | |
6679 | if (TREE_UNSIGNED (type)) | |
6680 | encoding = DW_ATE_unsigned_char; | |
6681 | else | |
6682 | encoding = DW_ATE_signed_char; | |
a3f97cbb JW |
6683 | break; |
6684 | ||
6685 | case REAL_TYPE: | |
a9d38797 | 6686 | encoding = DW_ATE_float; |
a3f97cbb JW |
6687 | break; |
6688 | ||
405f63da MM |
6689 | /* Dwarf2 doesn't know anything about complex ints, so use |
6690 | a user defined type for it. */ | |
a3f97cbb | 6691 | case COMPLEX_TYPE: |
405f63da MM |
6692 | if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) |
6693 | encoding = DW_ATE_complex_float; | |
6694 | else | |
6695 | encoding = DW_ATE_lo_user; | |
a3f97cbb JW |
6696 | break; |
6697 | ||
6698 | case BOOLEAN_TYPE: | |
a9d38797 JM |
6699 | /* GNU FORTRAN/Ada/C++ BOOLEAN type. */ |
6700 | encoding = DW_ATE_boolean; | |
a3f97cbb JW |
6701 | break; |
6702 | ||
6703 | default: | |
a9d38797 | 6704 | abort (); /* No other TREE_CODEs are Dwarf fundamental types. */ |
a3f97cbb JW |
6705 | } |
6706 | ||
a9d38797 | 6707 | base_type_result = new_die (DW_TAG_base_type, comp_unit_die); |
14a774a9 RK |
6708 | if (demangle_name_func) |
6709 | type_name = (*demangle_name_func) (type_name); | |
6710 | ||
a9d38797 JM |
6711 | add_AT_string (base_type_result, DW_AT_name, type_name); |
6712 | add_AT_unsigned (base_type_result, DW_AT_byte_size, | |
4e5a8d7b | 6713 | int_size_in_bytes (type)); |
a9d38797 | 6714 | add_AT_unsigned (base_type_result, DW_AT_encoding, encoding); |
a3f97cbb JW |
6715 | |
6716 | return base_type_result; | |
6717 | } | |
6718 | ||
6719 | /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to | |
6720 | the Dwarf "root" type for the given input type. The Dwarf "root" type of | |
6721 | a given type is generally the same as the given type, except that if the | |
6722 | given type is a pointer or reference type, then the root type of the given | |
6723 | type is the root type of the "basis" type for the pointer or reference | |
6724 | type. (This definition of the "root" type is recursive.) Also, the root | |
6725 | type of a `const' qualified type or a `volatile' qualified type is the | |
6726 | root type of the given type without the qualifiers. */ | |
71dfc51f | 6727 | |
a3f97cbb JW |
6728 | static tree |
6729 | root_type (type) | |
6730 | register tree type; | |
6731 | { | |
6732 | if (TREE_CODE (type) == ERROR_MARK) | |
6733 | return error_mark_node; | |
6734 | ||
6735 | switch (TREE_CODE (type)) | |
6736 | { | |
6737 | case ERROR_MARK: | |
6738 | return error_mark_node; | |
6739 | ||
6740 | case POINTER_TYPE: | |
6741 | case REFERENCE_TYPE: | |
6742 | return type_main_variant (root_type (TREE_TYPE (type))); | |
6743 | ||
6744 | default: | |
6745 | return type_main_variant (type); | |
6746 | } | |
6747 | } | |
6748 | ||
6749 | /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the | |
6750 | given input type is a Dwarf "fundamental" type. Otherwise return null. */ | |
71dfc51f RK |
6751 | |
6752 | static inline int | |
a3f97cbb JW |
6753 | is_base_type (type) |
6754 | register tree type; | |
6755 | { | |
6756 | switch (TREE_CODE (type)) | |
6757 | { | |
6758 | case ERROR_MARK: | |
6759 | case VOID_TYPE: | |
6760 | case INTEGER_TYPE: | |
6761 | case REAL_TYPE: | |
6762 | case COMPLEX_TYPE: | |
6763 | case BOOLEAN_TYPE: | |
6764 | case CHAR_TYPE: | |
6765 | return 1; | |
6766 | ||
6767 | case SET_TYPE: | |
6768 | case ARRAY_TYPE: | |
6769 | case RECORD_TYPE: | |
6770 | case UNION_TYPE: | |
6771 | case QUAL_UNION_TYPE: | |
6772 | case ENUMERAL_TYPE: | |
6773 | case FUNCTION_TYPE: | |
6774 | case METHOD_TYPE: | |
6775 | case POINTER_TYPE: | |
6776 | case REFERENCE_TYPE: | |
6777 | case FILE_TYPE: | |
6778 | case OFFSET_TYPE: | |
6779 | case LANG_TYPE: | |
604bb87d | 6780 | case VECTOR_TYPE: |
a3f97cbb JW |
6781 | return 0; |
6782 | ||
6783 | default: | |
6784 | abort (); | |
6785 | } | |
71dfc51f | 6786 | |
a3f97cbb JW |
6787 | return 0; |
6788 | } | |
6789 | ||
6790 | /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging | |
6791 | entry that chains various modifiers in front of the given type. */ | |
71dfc51f | 6792 | |
a3f97cbb JW |
6793 | static dw_die_ref |
6794 | modified_type_die (type, is_const_type, is_volatile_type, context_die) | |
6795 | register tree type; | |
6796 | register int is_const_type; | |
6797 | register int is_volatile_type; | |
6798 | register dw_die_ref context_die; | |
6799 | { | |
6800 | register enum tree_code code = TREE_CODE (type); | |
6801 | register dw_die_ref mod_type_die = NULL; | |
6802 | register dw_die_ref sub_die = NULL; | |
dfcf9891 | 6803 | register tree item_type = NULL; |
a3f97cbb JW |
6804 | |
6805 | if (code != ERROR_MARK) | |
6806 | { | |
a94dbf2c | 6807 | type = build_type_variant (type, is_const_type, is_volatile_type); |
bdb669cb JM |
6808 | |
6809 | mod_type_die = lookup_type_die (type); | |
6810 | if (mod_type_die) | |
6811 | return mod_type_die; | |
6812 | ||
556273e0 | 6813 | /* Handle C typedef types. */ |
a94dbf2c JM |
6814 | if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
6815 | && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) | |
6816 | { | |
6817 | tree dtype = TREE_TYPE (TYPE_NAME (type)); | |
6818 | if (type == dtype) | |
6819 | { | |
6820 | /* For a named type, use the typedef. */ | |
6821 | gen_type_die (type, context_die); | |
6822 | mod_type_die = lookup_type_die (type); | |
6823 | } | |
71dfc51f | 6824 | |
a94dbf2c JM |
6825 | else if (is_const_type < TYPE_READONLY (dtype) |
6826 | || is_volatile_type < TYPE_VOLATILE (dtype)) | |
6827 | /* cv-unqualified version of named type. Just use the unnamed | |
6828 | type to which it refers. */ | |
71dfc51f RK |
6829 | mod_type_die |
6830 | = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)), | |
6831 | is_const_type, is_volatile_type, | |
6832 | context_die); | |
6833 | /* Else cv-qualified version of named type; fall through. */ | |
a94dbf2c JM |
6834 | } |
6835 | ||
6836 | if (mod_type_die) | |
556273e0 KH |
6837 | /* OK. */ |
6838 | ; | |
a94dbf2c | 6839 | else if (is_const_type) |
a3f97cbb | 6840 | { |
ab72d377 | 6841 | mod_type_die = new_die (DW_TAG_const_type, comp_unit_die); |
a9d38797 | 6842 | sub_die = modified_type_die (type, 0, is_volatile_type, context_die); |
a3f97cbb JW |
6843 | } |
6844 | else if (is_volatile_type) | |
6845 | { | |
ab72d377 | 6846 | mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die); |
a9d38797 | 6847 | sub_die = modified_type_die (type, 0, 0, context_die); |
a3f97cbb JW |
6848 | } |
6849 | else if (code == POINTER_TYPE) | |
6850 | { | |
ab72d377 | 6851 | mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die); |
a3f97cbb | 6852 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
61b32c02 | 6853 | #if 0 |
a3f97cbb | 6854 | add_AT_unsigned (mod_type_die, DW_AT_address_class, 0); |
61b32c02 | 6855 | #endif |
a3f97cbb | 6856 | item_type = TREE_TYPE (type); |
a3f97cbb JW |
6857 | } |
6858 | else if (code == REFERENCE_TYPE) | |
6859 | { | |
ab72d377 | 6860 | mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die); |
a3f97cbb | 6861 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
61b32c02 | 6862 | #if 0 |
a3f97cbb | 6863 | add_AT_unsigned (mod_type_die, DW_AT_address_class, 0); |
556273e0 | 6864 | #endif |
a3f97cbb | 6865 | item_type = TREE_TYPE (type); |
a3f97cbb JW |
6866 | } |
6867 | else if (is_base_type (type)) | |
71dfc51f | 6868 | mod_type_die = base_type_die (type); |
a3f97cbb JW |
6869 | else |
6870 | { | |
4b674448 JM |
6871 | gen_type_die (type, context_die); |
6872 | ||
a3f97cbb JW |
6873 | /* We have to get the type_main_variant here (and pass that to the |
6874 | `lookup_type_die' routine) because the ..._TYPE node we have | |
6875 | might simply be a *copy* of some original type node (where the | |
6876 | copy was created to help us keep track of typedef names) and | |
6877 | that copy might have a different TYPE_UID from the original | |
a94dbf2c | 6878 | ..._TYPE node. */ |
a3f97cbb | 6879 | mod_type_die = lookup_type_die (type_main_variant (type)); |
3a88cbd1 JL |
6880 | if (mod_type_die == NULL) |
6881 | abort (); | |
a3f97cbb JW |
6882 | } |
6883 | } | |
71dfc51f | 6884 | |
dfcf9891 JW |
6885 | equate_type_number_to_die (type, mod_type_die); |
6886 | if (item_type) | |
71dfc51f RK |
6887 | /* We must do this after the equate_type_number_to_die call, in case |
6888 | this is a recursive type. This ensures that the modified_type_die | |
6889 | recursion will terminate even if the type is recursive. Recursive | |
6890 | types are possible in Ada. */ | |
6891 | sub_die = modified_type_die (item_type, | |
6892 | TYPE_READONLY (item_type), | |
6893 | TYPE_VOLATILE (item_type), | |
6894 | context_die); | |
6895 | ||
a3f97cbb | 6896 | if (sub_die != NULL) |
71dfc51f RK |
6897 | add_AT_die_ref (mod_type_die, DW_AT_type, sub_die); |
6898 | ||
a3f97cbb JW |
6899 | return mod_type_die; |
6900 | } | |
6901 | ||
a3f97cbb JW |
6902 | /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is |
6903 | an enumerated type. */ | |
71dfc51f RK |
6904 | |
6905 | static inline int | |
a3f97cbb JW |
6906 | type_is_enum (type) |
6907 | register tree type; | |
6908 | { | |
6909 | return TREE_CODE (type) == ENUMERAL_TYPE; | |
6910 | } | |
6911 | ||
7d9d8943 AM |
6912 | /* Return the register number described by a given RTL node. */ |
6913 | ||
6914 | static unsigned int | |
6915 | reg_number (rtl) | |
6916 | register rtx rtl; | |
6917 | { | |
6918 | register unsigned regno = REGNO (rtl); | |
6919 | ||
6920 | if (regno >= FIRST_PSEUDO_REGISTER) | |
6921 | { | |
6922 | warning ("internal regno botch: regno = %d\n", regno); | |
6923 | regno = 0; | |
6924 | } | |
6925 | ||
6926 | regno = DBX_REGISTER_NUMBER (regno); | |
6927 | return regno; | |
6928 | } | |
6929 | ||
a3f97cbb | 6930 | /* Return a location descriptor that designates a machine register. */ |
71dfc51f | 6931 | |
a3f97cbb JW |
6932 | static dw_loc_descr_ref |
6933 | reg_loc_descriptor (rtl) | |
6934 | register rtx rtl; | |
6935 | { | |
6936 | register dw_loc_descr_ref loc_result = NULL; | |
6937 | register unsigned reg = reg_number (rtl); | |
71dfc51f | 6938 | |
85066503 | 6939 | if (reg <= 31) |
71dfc51f | 6940 | loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0); |
a3f97cbb | 6941 | else |
71dfc51f RK |
6942 | loc_result = new_loc_descr (DW_OP_regx, reg, 0); |
6943 | ||
a3f97cbb JW |
6944 | return loc_result; |
6945 | } | |
6946 | ||
d8041cc8 RH |
6947 | /* Return a location descriptor that designates a constant. */ |
6948 | ||
6949 | static dw_loc_descr_ref | |
6950 | int_loc_descriptor (i) | |
6951 | HOST_WIDE_INT i; | |
6952 | { | |
6953 | enum dwarf_location_atom op; | |
6954 | ||
6955 | /* Pick the smallest representation of a constant, rather than just | |
6956 | defaulting to the LEB encoding. */ | |
6957 | if (i >= 0) | |
6958 | { | |
6959 | if (i <= 31) | |
6960 | op = DW_OP_lit0 + i; | |
6961 | else if (i <= 0xff) | |
6962 | op = DW_OP_const1u; | |
6963 | else if (i <= 0xffff) | |
6964 | op = DW_OP_const2u; | |
6965 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
6966 | || i <= 0xffffffff) | |
6967 | op = DW_OP_const4u; | |
6968 | else | |
6969 | op = DW_OP_constu; | |
6970 | } | |
6971 | else | |
6972 | { | |
6973 | if (i >= -0x80) | |
6974 | op = DW_OP_const1s; | |
6975 | else if (i >= -0x8000) | |
6976 | op = DW_OP_const2s; | |
6977 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
6978 | || i >= -0x80000000) | |
6979 | op = DW_OP_const4s; | |
6980 | else | |
6981 | op = DW_OP_consts; | |
6982 | } | |
6983 | ||
6984 | return new_loc_descr (op, i, 0); | |
6985 | } | |
6986 | ||
a3f97cbb | 6987 | /* Return a location descriptor that designates a base+offset location. */ |
71dfc51f | 6988 | |
a3f97cbb JW |
6989 | static dw_loc_descr_ref |
6990 | based_loc_descr (reg, offset) | |
6991 | unsigned reg; | |
6992 | long int offset; | |
6993 | { | |
6994 | register dw_loc_descr_ref loc_result; | |
810429b7 JM |
6995 | /* For the "frame base", we use the frame pointer or stack pointer |
6996 | registers, since the RTL for local variables is relative to one of | |
6997 | them. */ | |
6998 | register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed | |
b1ccbc24 | 6999 | ? HARD_FRAME_POINTER_REGNUM |
810429b7 | 7000 | : STACK_POINTER_REGNUM); |
71dfc51f | 7001 | |
a3f97cbb | 7002 | if (reg == fp_reg) |
71dfc51f | 7003 | loc_result = new_loc_descr (DW_OP_fbreg, offset, 0); |
85066503 | 7004 | else if (reg <= 31) |
71dfc51f | 7005 | loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0); |
a3f97cbb | 7006 | else |
71dfc51f RK |
7007 | loc_result = new_loc_descr (DW_OP_bregx, reg, offset); |
7008 | ||
a3f97cbb JW |
7009 | return loc_result; |
7010 | } | |
7011 | ||
7012 | /* Return true if this RTL expression describes a base+offset calculation. */ | |
71dfc51f RK |
7013 | |
7014 | static inline int | |
a3f97cbb JW |
7015 | is_based_loc (rtl) |
7016 | register rtx rtl; | |
7017 | { | |
71dfc51f RK |
7018 | return (GET_CODE (rtl) == PLUS |
7019 | && ((GET_CODE (XEXP (rtl, 0)) == REG | |
7020 | && GET_CODE (XEXP (rtl, 1)) == CONST_INT))); | |
a3f97cbb JW |
7021 | } |
7022 | ||
7023 | /* The following routine converts the RTL for a variable or parameter | |
7024 | (resident in memory) into an equivalent Dwarf representation of a | |
7025 | mechanism for getting the address of that same variable onto the top of a | |
7026 | hypothetical "address evaluation" stack. | |
71dfc51f | 7027 | |
a3f97cbb JW |
7028 | When creating memory location descriptors, we are effectively transforming |
7029 | the RTL for a memory-resident object into its Dwarf postfix expression | |
7030 | equivalent. This routine recursively descends an RTL tree, turning | |
e60d4d7b JL |
7031 | it into Dwarf postfix code as it goes. |
7032 | ||
7033 | MODE is the mode of the memory reference, needed to handle some | |
7034 | autoincrement addressing modes. */ | |
71dfc51f | 7035 | |
a3f97cbb | 7036 | static dw_loc_descr_ref |
e60d4d7b | 7037 | mem_loc_descriptor (rtl, mode) |
a3f97cbb | 7038 | register rtx rtl; |
e60d4d7b | 7039 | enum machine_mode mode; |
a3f97cbb JW |
7040 | { |
7041 | dw_loc_descr_ref mem_loc_result = NULL; | |
556273e0 | 7042 | /* Note that for a dynamically sized array, the location we will generate a |
a3f97cbb JW |
7043 | description of here will be the lowest numbered location which is |
7044 | actually within the array. That's *not* necessarily the same as the | |
7045 | zeroth element of the array. */ | |
71dfc51f | 7046 | |
1865dbb5 JM |
7047 | #ifdef ASM_SIMPLIFY_DWARF_ADDR |
7048 | rtl = ASM_SIMPLIFY_DWARF_ADDR (rtl); | |
7049 | #endif | |
7050 | ||
a3f97cbb JW |
7051 | switch (GET_CODE (rtl)) |
7052 | { | |
e60d4d7b JL |
7053 | case POST_INC: |
7054 | case POST_DEC: | |
e2134eea | 7055 | case POST_MODIFY: |
e60d4d7b JL |
7056 | /* POST_INC and POST_DEC can be handled just like a SUBREG. So we |
7057 | just fall into the SUBREG code. */ | |
7058 | ||
556273e0 | 7059 | /* Fall through. */ |
e60d4d7b | 7060 | |
a3f97cbb JW |
7061 | case SUBREG: |
7062 | /* The case of a subreg may arise when we have a local (register) | |
7063 | variable or a formal (register) parameter which doesn't quite fill | |
7064 | up an entire register. For now, just assume that it is | |
7065 | legitimate to make the Dwarf info refer to the whole register which | |
7066 | contains the given subreg. */ | |
7067 | rtl = XEXP (rtl, 0); | |
71dfc51f | 7068 | |
556273e0 | 7069 | /* Fall through. */ |
a3f97cbb JW |
7070 | |
7071 | case REG: | |
7072 | /* Whenever a register number forms a part of the description of the | |
7073 | method for calculating the (dynamic) address of a memory resident | |
556273e0 | 7074 | object, DWARF rules require the register number be referred to as |
a3f97cbb JW |
7075 | a "base register". This distinction is not based in any way upon |
7076 | what category of register the hardware believes the given register | |
7077 | belongs to. This is strictly DWARF terminology we're dealing with | |
7078 | here. Note that in cases where the location of a memory-resident | |
7079 | data object could be expressed as: OP_ADD (OP_BASEREG (basereg), | |
7080 | OP_CONST (0)) the actual DWARF location descriptor that we generate | |
7081 | may just be OP_BASEREG (basereg). This may look deceptively like | |
7082 | the object in question was allocated to a register (rather than in | |
7083 | memory) so DWARF consumers need to be aware of the subtle | |
7084 | distinction between OP_REG and OP_BASEREG. */ | |
7085 | mem_loc_result = based_loc_descr (reg_number (rtl), 0); | |
7086 | break; | |
7087 | ||
7088 | case MEM: | |
f7d2b0ed RH |
7089 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl)); |
7090 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0)); | |
a3f97cbb JW |
7091 | break; |
7092 | ||
d8041cc8 RH |
7093 | case LABEL_REF: |
7094 | /* Some ports can transform a symbol ref into a label ref, because | |
368f4cd6 NC |
7095 | the symbol ref is too far away and has to be dumped into a constant |
7096 | pool. */ | |
a3f97cbb JW |
7097 | case CONST: |
7098 | case SYMBOL_REF: | |
7099 | mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0); | |
7100 | mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
1865dbb5 | 7101 | mem_loc_result->dw_loc_oprnd1.v.val_addr = save_rtx (rtl); |
a3f97cbb JW |
7102 | break; |
7103 | ||
e2134eea JH |
7104 | case PRE_MODIFY: |
7105 | /* Extract the PLUS expression nested inside and fall into | |
7106 | PLUS code bellow. */ | |
7107 | rtl = XEXP (rtl, 1); | |
7108 | goto plus; | |
7109 | ||
e60d4d7b JL |
7110 | case PRE_INC: |
7111 | case PRE_DEC: | |
7112 | /* Turn these into a PLUS expression and fall into the PLUS code | |
7113 | below. */ | |
7114 | rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0), | |
7115 | GEN_INT (GET_CODE (rtl) == PRE_INC | |
556273e0 KH |
7116 | ? GET_MODE_UNIT_SIZE (mode) |
7117 | : -GET_MODE_UNIT_SIZE (mode))); | |
7118 | ||
7119 | /* Fall through. */ | |
e60d4d7b | 7120 | |
a3f97cbb | 7121 | case PLUS: |
e2134eea | 7122 | plus: |
a3f97cbb | 7123 | if (is_based_loc (rtl)) |
71dfc51f RK |
7124 | mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)), |
7125 | INTVAL (XEXP (rtl, 1))); | |
a3f97cbb JW |
7126 | else |
7127 | { | |
d8041cc8 RH |
7128 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode); |
7129 | ||
7130 | if (GET_CODE (XEXP (rtl, 1)) == CONST_INT | |
7131 | && INTVAL (XEXP (rtl, 1)) >= 0) | |
7132 | { | |
7133 | add_loc_descr (&mem_loc_result, | |
7134 | new_loc_descr (DW_OP_plus_uconst, | |
7135 | INTVAL (XEXP (rtl, 1)), 0)); | |
7136 | } | |
7137 | else | |
7138 | { | |
7139 | add_loc_descr (&mem_loc_result, | |
7140 | mem_loc_descriptor (XEXP (rtl, 1), mode)); | |
7141 | add_loc_descr (&mem_loc_result, | |
7142 | new_loc_descr (DW_OP_plus, 0, 0)); | |
7143 | } | |
a3f97cbb JW |
7144 | } |
7145 | break; | |
7146 | ||
dd2478ae JW |
7147 | case MULT: |
7148 | /* If a pseudo-reg is optimized away, it is possible for it to | |
7149 | be replaced with a MEM containing a multiply. */ | |
d8041cc8 RH |
7150 | add_loc_descr (&mem_loc_result, |
7151 | mem_loc_descriptor (XEXP (rtl, 0), mode)); | |
7152 | add_loc_descr (&mem_loc_result, | |
7153 | mem_loc_descriptor (XEXP (rtl, 1), mode)); | |
dd2478ae JW |
7154 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0)); |
7155 | break; | |
7156 | ||
a3f97cbb | 7157 | case CONST_INT: |
d8041cc8 | 7158 | mem_loc_result = int_loc_descriptor (INTVAL (rtl)); |
a3f97cbb JW |
7159 | break; |
7160 | ||
7161 | default: | |
7162 | abort (); | |
7163 | } | |
71dfc51f | 7164 | |
a3f97cbb JW |
7165 | return mem_loc_result; |
7166 | } | |
7167 | ||
956d6950 | 7168 | /* Return a descriptor that describes the concatenation of two locations. |
4401bf24 JL |
7169 | This is typically a complex variable. */ |
7170 | ||
7171 | static dw_loc_descr_ref | |
7172 | concat_loc_descriptor (x0, x1) | |
7173 | register rtx x0, x1; | |
7174 | { | |
7175 | dw_loc_descr_ref cc_loc_result = NULL; | |
7176 | ||
7177 | if (!is_pseudo_reg (x0) | |
7178 | && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0)))) | |
7179 | add_loc_descr (&cc_loc_result, loc_descriptor (x0)); | |
7180 | add_loc_descr (&cc_loc_result, | |
7181 | new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0)); | |
7182 | ||
7183 | if (!is_pseudo_reg (x1) | |
7184 | && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0)))) | |
7185 | add_loc_descr (&cc_loc_result, loc_descriptor (x1)); | |
7186 | add_loc_descr (&cc_loc_result, | |
7187 | new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0)); | |
7188 | ||
7189 | return cc_loc_result; | |
7190 | } | |
7191 | ||
a3f97cbb JW |
7192 | /* Output a proper Dwarf location descriptor for a variable or parameter |
7193 | which is either allocated in a register or in a memory location. For a | |
7194 | register, we just generate an OP_REG and the register number. For a | |
7195 | memory location we provide a Dwarf postfix expression describing how to | |
7196 | generate the (dynamic) address of the object onto the address stack. */ | |
71dfc51f | 7197 | |
a3f97cbb JW |
7198 | static dw_loc_descr_ref |
7199 | loc_descriptor (rtl) | |
7200 | register rtx rtl; | |
7201 | { | |
7202 | dw_loc_descr_ref loc_result = NULL; | |
7203 | switch (GET_CODE (rtl)) | |
7204 | { | |
7205 | case SUBREG: | |
a3f97cbb JW |
7206 | /* The case of a subreg may arise when we have a local (register) |
7207 | variable or a formal (register) parameter which doesn't quite fill | |
71dfc51f | 7208 | up an entire register. For now, just assume that it is |
a3f97cbb JW |
7209 | legitimate to make the Dwarf info refer to the whole register which |
7210 | contains the given subreg. */ | |
a3f97cbb | 7211 | rtl = XEXP (rtl, 0); |
71dfc51f | 7212 | |
556273e0 | 7213 | /* Fall through. */ |
a3f97cbb JW |
7214 | |
7215 | case REG: | |
5c90448c | 7216 | loc_result = reg_loc_descriptor (rtl); |
a3f97cbb JW |
7217 | break; |
7218 | ||
7219 | case MEM: | |
e60d4d7b | 7220 | loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl)); |
a3f97cbb JW |
7221 | break; |
7222 | ||
4401bf24 JL |
7223 | case CONCAT: |
7224 | loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1)); | |
7225 | break; | |
7226 | ||
a3f97cbb | 7227 | default: |
71dfc51f | 7228 | abort (); |
a3f97cbb | 7229 | } |
71dfc51f | 7230 | |
a3f97cbb JW |
7231 | return loc_result; |
7232 | } | |
7233 | ||
d8041cc8 RH |
7234 | /* Similar, but generate the descriptor from trees instead of rtl. |
7235 | This comes up particularly with variable length arrays. */ | |
7236 | ||
7237 | static dw_loc_descr_ref | |
7238 | loc_descriptor_from_tree (loc, addressp) | |
7239 | tree loc; | |
7240 | int addressp; | |
7241 | { | |
7242 | dw_loc_descr_ref ret = NULL; | |
7243 | int indirect_size = 0; | |
7244 | int unsignedp = TREE_UNSIGNED (TREE_TYPE (loc)); | |
7245 | enum dwarf_location_atom op; | |
7246 | ||
7247 | /* ??? Most of the time we do not take proper care for sign/zero | |
7248 | extending the values properly. Hopefully this won't be a real | |
7249 | problem... */ | |
7250 | ||
7251 | switch (TREE_CODE (loc)) | |
7252 | { | |
7253 | case ERROR_MARK: | |
7254 | break; | |
7255 | ||
b4ae5201 RK |
7256 | case WITH_RECORD_EXPR: |
7257 | /* This case involves extracting fields from an object to determine the | |
7258 | position of other fields. We don't try to encode this here. The | |
7259 | only user of this is Ada, which encodes the needed information using | |
7260 | the names of types. */ | |
7261 | return ret; | |
7262 | ||
d8041cc8 RH |
7263 | case VAR_DECL: |
7264 | case PARM_DECL: | |
7265 | { | |
7266 | rtx rtl = rtl_for_decl_location (loc); | |
7267 | enum machine_mode mode = DECL_MODE (loc); | |
7268 | ||
a97c9600 RH |
7269 | if (rtl == NULL_RTX) |
7270 | break; | |
7271 | else if (CONSTANT_P (rtl)) | |
d8041cc8 RH |
7272 | { |
7273 | ret = new_loc_descr (DW_OP_addr, 0, 0); | |
7274 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
7275 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
7276 | indirect_size = GET_MODE_SIZE (mode); | |
7277 | } | |
7278 | else | |
7279 | { | |
7280 | if (GET_CODE (rtl) == MEM) | |
7281 | { | |
7282 | indirect_size = GET_MODE_SIZE (mode); | |
7283 | rtl = XEXP (rtl, 0); | |
7284 | } | |
7285 | ret = mem_loc_descriptor (rtl, mode); | |
7286 | } | |
7287 | } | |
7288 | break; | |
7289 | ||
7290 | case INDIRECT_REF: | |
7291 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
7292 | indirect_size = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (loc))); | |
7293 | break; | |
7294 | ||
ed972b14 RK |
7295 | case NOP_EXPR: |
7296 | case CONVERT_EXPR: | |
7297 | case NON_LVALUE_EXPR: | |
b4ae5201 | 7298 | case SAVE_EXPR: |
ed972b14 | 7299 | return loc_descriptor_from_tree (TREE_OPERAND (loc, 0), addressp); |
e57cabac | 7300 | |
d8041cc8 RH |
7301 | case COMPONENT_REF: |
7302 | case BIT_FIELD_REF: | |
7303 | case ARRAY_REF: | |
7304 | { | |
7305 | tree obj, offset; | |
7306 | HOST_WIDE_INT bitsize, bitpos, bytepos; | |
7307 | enum machine_mode mode; | |
7308 | int volatilep; | |
7309 | unsigned int alignment; | |
7310 | ||
7311 | obj = get_inner_reference (loc, &bitsize, &bitpos, &offset, &mode, | |
7312 | &unsignedp, &volatilep, &alignment); | |
7313 | ret = loc_descriptor_from_tree (obj, 1); | |
7314 | ||
7315 | if (offset != NULL_TREE) | |
7316 | { | |
7317 | /* Variable offset. */ | |
7318 | add_loc_descr (&ret, loc_descriptor_from_tree (offset, 0)); | |
7319 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); | |
7320 | } | |
7321 | ||
7322 | if (addressp) | |
7323 | { | |
7324 | /* We cannot address anything not on a unit boundary. */ | |
7325 | if (bitpos % BITS_PER_UNIT != 0) | |
7326 | abort (); | |
7327 | } | |
7328 | else | |
7329 | { | |
7330 | if (bitpos % BITS_PER_UNIT != 0 | |
7331 | || bitsize % BITS_PER_UNIT != 0) | |
7332 | { | |
7333 | /* ??? We could handle this by loading and shifting etc. | |
7334 | Wait until someone needs it before expending the effort. */ | |
7335 | abort (); | |
7336 | } | |
7337 | ||
7338 | indirect_size = bitsize / BITS_PER_UNIT; | |
7339 | } | |
7340 | ||
7341 | bytepos = bitpos / BITS_PER_UNIT; | |
7342 | if (bytepos > 0) | |
7343 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus_uconst, bytepos, 0)); | |
7344 | else if (bytepos < 0) | |
7345 | { | |
7346 | add_loc_descr (&ret, int_loc_descriptor (bytepos)); | |
7347 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); | |
7348 | } | |
7349 | break; | |
7350 | } | |
7351 | ||
7352 | case INTEGER_CST: | |
7353 | if (host_integerp (loc, 0)) | |
7354 | ret = int_loc_descriptor (tree_low_cst (loc, 0)); | |
7355 | break; | |
d8041cc8 RH |
7356 | |
7357 | case BIT_AND_EXPR: | |
7358 | op = DW_OP_and; | |
7359 | goto do_binop; | |
7360 | case BIT_XOR_EXPR: | |
7361 | op = DW_OP_xor; | |
7362 | goto do_binop; | |
7363 | case BIT_IOR_EXPR: | |
7364 | op = DW_OP_or; | |
7365 | goto do_binop; | |
7366 | case TRUNC_DIV_EXPR: | |
7367 | op = DW_OP_div; | |
7368 | goto do_binop; | |
7369 | case MINUS_EXPR: | |
7370 | op = DW_OP_minus; | |
7371 | goto do_binop; | |
7372 | case TRUNC_MOD_EXPR: | |
7373 | op = DW_OP_mod; | |
7374 | goto do_binop; | |
7375 | case MULT_EXPR: | |
7376 | op = DW_OP_mul; | |
7377 | goto do_binop; | |
7378 | case LSHIFT_EXPR: | |
7379 | op = DW_OP_shl; | |
7380 | goto do_binop; | |
7381 | case RSHIFT_EXPR: | |
7382 | op = (unsignedp ? DW_OP_shr : DW_OP_shra); | |
7383 | goto do_binop; | |
7384 | case PLUS_EXPR: | |
7385 | if (TREE_CODE (TREE_OPERAND (loc, 1)) == INTEGER_CST | |
7386 | && host_integerp (TREE_OPERAND (loc, 1), 0)) | |
7387 | { | |
7388 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
7389 | add_loc_descr (&ret, | |
7390 | new_loc_descr (DW_OP_plus_uconst, | |
7391 | tree_low_cst (TREE_OPERAND (loc, 1), | |
7392 | 0), | |
7393 | 0)); | |
7394 | break; | |
7395 | } | |
7396 | op = DW_OP_plus; | |
7397 | goto do_binop; | |
7398 | case LE_EXPR: | |
7399 | if (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) | |
7400 | break; | |
7401 | op = DW_OP_le; | |
7402 | goto do_binop; | |
7403 | case GE_EXPR: | |
7404 | if (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) | |
7405 | break; | |
7406 | op = DW_OP_ge; | |
7407 | goto do_binop; | |
7408 | case LT_EXPR: | |
7409 | if (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) | |
7410 | break; | |
7411 | op = DW_OP_lt; | |
7412 | goto do_binop; | |
7413 | case GT_EXPR: | |
7414 | if (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) | |
7415 | break; | |
7416 | op = DW_OP_gt; | |
7417 | goto do_binop; | |
7418 | case EQ_EXPR: | |
7419 | op = DW_OP_eq; | |
7420 | goto do_binop; | |
7421 | case NE_EXPR: | |
7422 | op = DW_OP_ne; | |
7423 | goto do_binop; | |
7424 | ||
7425 | do_binop: | |
7426 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
7427 | add_loc_descr (&ret, loc_descriptor_from_tree (TREE_OPERAND (loc, 1), 0)); | |
7428 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); | |
7429 | break; | |
7430 | ||
7431 | case BIT_NOT_EXPR: | |
7432 | op = DW_OP_not; | |
7433 | goto do_unop; | |
7434 | case ABS_EXPR: | |
7435 | op = DW_OP_abs; | |
7436 | goto do_unop; | |
7437 | case NEGATE_EXPR: | |
7438 | op = DW_OP_neg; | |
7439 | goto do_unop; | |
7440 | ||
7441 | do_unop: | |
7442 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
7443 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); | |
7444 | break; | |
7445 | ||
7446 | case MAX_EXPR: | |
7447 | loc = build (COND_EXPR, TREE_TYPE (loc), | |
7448 | build (LT_EXPR, integer_type_node, | |
7449 | TREE_OPERAND (loc, 0), TREE_OPERAND (loc, 1)), | |
7450 | TREE_OPERAND (loc, 1), TREE_OPERAND (loc, 0)); | |
7451 | /* FALLTHRU */ | |
7452 | ||
7453 | case COND_EXPR: | |
7454 | { | |
7455 | dw_loc_descr_ref bra_node, jump_node, tmp; | |
7456 | ||
7457 | ret = loc_descriptor_from_tree (TREE_OPERAND (loc, 0), 0); | |
7458 | bra_node = new_loc_descr (DW_OP_bra, 0, 0); | |
7459 | add_loc_descr (&ret, bra_node); | |
7460 | ||
7461 | tmp = loc_descriptor_from_tree (TREE_OPERAND (loc, 2), 0); | |
7462 | add_loc_descr (&ret, tmp); | |
7463 | jump_node = new_loc_descr (DW_OP_skip, 0, 0); | |
7464 | add_loc_descr (&ret, jump_node); | |
7465 | ||
7466 | tmp = loc_descriptor_from_tree (TREE_OPERAND (loc, 1), 0); | |
7467 | add_loc_descr (&ret, tmp); | |
7468 | bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc; | |
7469 | bra_node->dw_loc_oprnd1.v.val_loc = tmp; | |
7470 | ||
7471 | /* ??? Need a node to point the skip at. Use a nop. */ | |
7472 | tmp = new_loc_descr (DW_OP_nop, 0, 0); | |
7473 | add_loc_descr (&ret, tmp); | |
7474 | jump_node->dw_loc_oprnd1.val_class = dw_val_class_loc; | |
7475 | jump_node->dw_loc_oprnd1.v.val_loc = tmp; | |
7476 | } | |
7477 | break; | |
7478 | ||
7479 | default: | |
7480 | abort (); | |
7481 | } | |
7482 | ||
7483 | /* If we can't fill the request for an address, die. */ | |
7484 | if (addressp && indirect_size == 0) | |
7485 | abort (); | |
7486 | ||
7487 | /* If we've got an address and don't want one, dereference. */ | |
7488 | if (!addressp && indirect_size > 0) | |
7489 | { | |
7490 | if (indirect_size > DWARF2_ADDR_SIZE) | |
7491 | abort (); | |
7492 | if (indirect_size == DWARF2_ADDR_SIZE) | |
7493 | op = DW_OP_deref; | |
7494 | else | |
7495 | op = DW_OP_deref_size; | |
7496 | add_loc_descr (&ret, new_loc_descr (op, indirect_size, 0)); | |
7497 | } | |
7498 | ||
7499 | return ret; | |
7500 | } | |
7501 | ||
665f2503 | 7502 | /* Given a value, round it up to the lowest multiple of `boundary' |
a3f97cbb | 7503 | which is not less than the value itself. */ |
71dfc51f | 7504 | |
665f2503 | 7505 | static inline HOST_WIDE_INT |
a3f97cbb | 7506 | ceiling (value, boundary) |
665f2503 RK |
7507 | HOST_WIDE_INT value; |
7508 | unsigned int boundary; | |
a3f97cbb JW |
7509 | { |
7510 | return (((value + boundary - 1) / boundary) * boundary); | |
7511 | } | |
7512 | ||
7513 | /* Given a pointer to what is assumed to be a FIELD_DECL node, return a | |
7514 | pointer to the declared type for the relevant field variable, or return | |
7515 | `integer_type_node' if the given node turns out to be an | |
7516 | ERROR_MARK node. */ | |
71dfc51f RK |
7517 | |
7518 | static inline tree | |
a3f97cbb JW |
7519 | field_type (decl) |
7520 | register tree decl; | |
7521 | { | |
7522 | register tree type; | |
7523 | ||
7524 | if (TREE_CODE (decl) == ERROR_MARK) | |
7525 | return integer_type_node; | |
7526 | ||
7527 | type = DECL_BIT_FIELD_TYPE (decl); | |
71dfc51f | 7528 | if (type == NULL_TREE) |
a3f97cbb JW |
7529 | type = TREE_TYPE (decl); |
7530 | ||
7531 | return type; | |
7532 | } | |
7533 | ||
5f446d21 DD |
7534 | /* Given a pointer to a tree node, return the alignment in bits for |
7535 | it, or else return BITS_PER_WORD if the node actually turns out to | |
7536 | be an ERROR_MARK node. */ | |
71dfc51f RK |
7537 | |
7538 | static inline unsigned | |
a3f97cbb JW |
7539 | simple_type_align_in_bits (type) |
7540 | register tree type; | |
7541 | { | |
7542 | return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD; | |
7543 | } | |
7544 | ||
5f446d21 DD |
7545 | static inline unsigned |
7546 | simple_decl_align_in_bits (decl) | |
7547 | register tree decl; | |
7548 | { | |
7549 | return (TREE_CODE (decl) != ERROR_MARK) ? DECL_ALIGN (decl) : BITS_PER_WORD; | |
7550 | } | |
7551 | ||
a3f97cbb JW |
7552 | /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE |
7553 | node, return the size in bits for the type if it is a constant, or else | |
7554 | return the alignment for the type if the type's size is not constant, or | |
7555 | else return BITS_PER_WORD if the type actually turns out to be an | |
7556 | ERROR_MARK node. */ | |
71dfc51f | 7557 | |
665f2503 | 7558 | static inline unsigned HOST_WIDE_INT |
a3f97cbb JW |
7559 | simple_type_size_in_bits (type) |
7560 | register tree type; | |
7561 | { | |
3df18884 RH |
7562 | tree type_size_tree; |
7563 | ||
a3f97cbb JW |
7564 | if (TREE_CODE (type) == ERROR_MARK) |
7565 | return BITS_PER_WORD; | |
3df18884 | 7566 | type_size_tree = TYPE_SIZE (type); |
a3f97cbb | 7567 | |
3df18884 RH |
7568 | if (type_size_tree == NULL_TREE) |
7569 | return 0; | |
7570 | if (! host_integerp (type_size_tree, 1)) | |
7571 | return TYPE_ALIGN (type); | |
7572 | return tree_low_cst (type_size_tree, 1); | |
a3f97cbb JW |
7573 | } |
7574 | ||
7575 | /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and | |
7576 | return the byte offset of the lowest addressed byte of the "containing | |
7577 | object" for the given FIELD_DECL, or return 0 if we are unable to | |
7578 | determine what that offset is, either because the argument turns out to | |
7579 | be a pointer to an ERROR_MARK node, or because the offset is actually | |
7580 | variable. (We can't handle the latter case just yet). */ | |
71dfc51f | 7581 | |
665f2503 | 7582 | static HOST_WIDE_INT |
a3f97cbb JW |
7583 | field_byte_offset (decl) |
7584 | register tree decl; | |
7585 | { | |
665f2503 | 7586 | unsigned int type_align_in_bits; |
5f446d21 | 7587 | unsigned int decl_align_in_bits; |
665f2503 | 7588 | unsigned HOST_WIDE_INT type_size_in_bits; |
665f2503 RK |
7589 | HOST_WIDE_INT object_offset_in_bits; |
7590 | HOST_WIDE_INT object_offset_in_bytes; | |
7591 | tree type; | |
7592 | tree field_size_tree; | |
7593 | HOST_WIDE_INT bitpos_int; | |
7594 | HOST_WIDE_INT deepest_bitpos; | |
7595 | unsigned HOST_WIDE_INT field_size_in_bits; | |
a3f97cbb JW |
7596 | |
7597 | if (TREE_CODE (decl) == ERROR_MARK) | |
7598 | return 0; | |
7599 | ||
7600 | if (TREE_CODE (decl) != FIELD_DECL) | |
7601 | abort (); | |
7602 | ||
7603 | type = field_type (decl); | |
a3f97cbb JW |
7604 | field_size_tree = DECL_SIZE (decl); |
7605 | ||
3df18884 RH |
7606 | /* The size could be unspecified if there was an error, or for |
7607 | a flexible array member. */ | |
50352c9c | 7608 | if (! field_size_tree) |
3df18884 | 7609 | field_size_tree = bitsize_zero_node; |
50352c9c | 7610 | |
556273e0 | 7611 | /* We cannot yet cope with fields whose positions are variable, so |
a3f97cbb JW |
7612 | for now, when we see such things, we simply return 0. Someday, we may |
7613 | be able to handle such cases, but it will be damn difficult. */ | |
665f2503 | 7614 | if (! host_integerp (bit_position (decl), 0)) |
a3f97cbb | 7615 | return 0; |
14a774a9 | 7616 | |
665f2503 | 7617 | bitpos_int = int_bit_position (decl); |
a3f97cbb | 7618 | |
3df18884 | 7619 | /* If we don't know the size of the field, pretend it's a full word. */ |
665f2503 RK |
7620 | if (host_integerp (field_size_tree, 1)) |
7621 | field_size_in_bits = tree_low_cst (field_size_tree, 1); | |
14a774a9 RK |
7622 | else |
7623 | field_size_in_bits = BITS_PER_WORD; | |
a3f97cbb JW |
7624 | |
7625 | type_size_in_bits = simple_type_size_in_bits (type); | |
a3f97cbb | 7626 | type_align_in_bits = simple_type_align_in_bits (type); |
5f446d21 | 7627 | decl_align_in_bits = simple_decl_align_in_bits (decl); |
a3f97cbb JW |
7628 | |
7629 | /* Note that the GCC front-end doesn't make any attempt to keep track of | |
7630 | the starting bit offset (relative to the start of the containing | |
7631 | structure type) of the hypothetical "containing object" for a bit- | |
7632 | field. Thus, when computing the byte offset value for the start of the | |
556273e0 | 7633 | "containing object" of a bit-field, we must deduce this information on |
a3f97cbb JW |
7634 | our own. This can be rather tricky to do in some cases. For example, |
7635 | handling the following structure type definition when compiling for an | |
7636 | i386/i486 target (which only aligns long long's to 32-bit boundaries) | |
7637 | can be very tricky: | |
7638 | ||
7639 | struct S { int field1; long long field2:31; }; | |
7640 | ||
7641 | Fortunately, there is a simple rule-of-thumb which can be | |
7642 | used in such cases. When compiling for an i386/i486, GCC will allocate | |
556273e0 | 7643 | 8 bytes for the structure shown above. It decides to do this based upon |
a3f97cbb JW |
7644 | one simple rule for bit-field allocation. Quite simply, GCC allocates |
7645 | each "containing object" for each bit-field at the first (i.e. lowest | |
7646 | addressed) legitimate alignment boundary (based upon the required | |
7647 | minimum alignment for the declared type of the field) which it can | |
7648 | possibly use, subject to the condition that there is still enough | |
7649 | available space remaining in the containing object (when allocated at | |
7650 | the selected point) to fully accommodate all of the bits of the | |
7651 | bit-field itself. This simple rule makes it obvious why GCC allocates | |
7652 | 8 bytes for each object of the structure type shown above. When looking | |
7653 | for a place to allocate the "containing object" for `field2', the | |
7654 | compiler simply tries to allocate a 64-bit "containing object" at each | |
7655 | successive 32-bit boundary (starting at zero) until it finds a place to | |
7656 | allocate that 64- bit field such that at least 31 contiguous (and | |
7657 | previously unallocated) bits remain within that selected 64 bit field. | |
7658 | (As it turns out, for the example above, the compiler finds that it is | |
7659 | OK to allocate the "containing object" 64-bit field at bit-offset zero | |
7660 | within the structure type.) Here we attempt to work backwards from the | |
556273e0 | 7661 | limited set of facts we're given, and we try to deduce from those facts, |
a3f97cbb | 7662 | where GCC must have believed that the containing object started (within |
556273e0 KH |
7663 | the structure type). The value we deduce is then used (by the callers of |
7664 | this routine) to generate DW_AT_location and DW_AT_bit_offset attributes | |
a3f97cbb JW |
7665 | for fields (both bit-fields and, in the case of DW_AT_location, regular |
7666 | fields as well). */ | |
7667 | ||
7668 | /* Figure out the bit-distance from the start of the structure to the | |
7669 | "deepest" bit of the bit-field. */ | |
7670 | deepest_bitpos = bitpos_int + field_size_in_bits; | |
7671 | ||
7672 | /* This is the tricky part. Use some fancy footwork to deduce where the | |
7673 | lowest addressed bit of the containing object must be. */ | |
5f446d21 DD |
7674 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; |
7675 | ||
7676 | /* Round up to type_align by default. This works best for bitfields. */ | |
7677 | object_offset_in_bits += type_align_in_bits - 1; | |
7678 | object_offset_in_bits /= type_align_in_bits; | |
7679 | object_offset_in_bits *= type_align_in_bits; | |
a3f97cbb | 7680 | |
5f446d21 DD |
7681 | if (object_offset_in_bits > bitpos_int) |
7682 | { | |
7683 | /* Sigh, the decl must be packed. */ | |
7684 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; | |
7685 | ||
7686 | /* Round up to decl_align instead. */ | |
7687 | object_offset_in_bits += decl_align_in_bits - 1; | |
7688 | object_offset_in_bits /= decl_align_in_bits; | |
7689 | object_offset_in_bits *= decl_align_in_bits; | |
7690 | } | |
a3f97cbb | 7691 | |
5f446d21 | 7692 | object_offset_in_bytes = object_offset_in_bits / BITS_PER_UNIT; |
a3f97cbb JW |
7693 | |
7694 | return object_offset_in_bytes; | |
7695 | } | |
a3f97cbb | 7696 | \f |
71dfc51f RK |
7697 | /* The following routines define various Dwarf attributes and any data |
7698 | associated with them. */ | |
a3f97cbb | 7699 | |
ef76d03b | 7700 | /* Add a location description attribute value to a DIE. |
a3f97cbb | 7701 | |
ef76d03b | 7702 | This emits location attributes suitable for whole variables and |
a3f97cbb JW |
7703 | whole parameters. Note that the location attributes for struct fields are |
7704 | generated by the routine `data_member_location_attribute' below. */ | |
71dfc51f | 7705 | |
a3f97cbb | 7706 | static void |
ef76d03b | 7707 | add_AT_location_description (die, attr_kind, rtl) |
a3f97cbb | 7708 | dw_die_ref die; |
ef76d03b | 7709 | enum dwarf_attribute attr_kind; |
a3f97cbb JW |
7710 | register rtx rtl; |
7711 | { | |
a3f97cbb JW |
7712 | /* Handle a special case. If we are about to output a location descriptor |
7713 | for a variable or parameter which has been optimized out of existence, | |
6a7a9f01 | 7714 | don't do that. A variable which has been optimized out |
a3f97cbb JW |
7715 | of existence will have a DECL_RTL value which denotes a pseudo-reg. |
7716 | Currently, in some rare cases, variables can have DECL_RTL values which | |
7717 | look like (MEM (REG pseudo-reg#)). These cases are due to bugs | |
556273e0 | 7718 | elsewhere in the compiler. We treat such cases as if the variable(s) in |
6a7a9f01 | 7719 | question had been optimized out of existence. */ |
a3f97cbb | 7720 | |
6a7a9f01 JM |
7721 | if (is_pseudo_reg (rtl) |
7722 | || (GET_CODE (rtl) == MEM | |
4401bf24 | 7723 | && is_pseudo_reg (XEXP (rtl, 0))) |
556273e0 | 7724 | /* This can happen for a PARM_DECL with a DECL_INCOMING_RTL which |
bce8fed7 JL |
7725 | references the internal argument pointer (a pseudo) in a function |
7726 | where all references to the internal argument pointer were | |
7727 | eliminated via the optimizers. */ | |
7728 | || (GET_CODE (rtl) == MEM | |
7729 | && GET_CODE (XEXP (rtl, 0)) == PLUS | |
7730 | && is_pseudo_reg (XEXP (XEXP (rtl, 0), 0))) | |
4401bf24 JL |
7731 | || (GET_CODE (rtl) == CONCAT |
7732 | && is_pseudo_reg (XEXP (rtl, 0)) | |
7733 | && is_pseudo_reg (XEXP (rtl, 1)))) | |
6a7a9f01 | 7734 | return; |
a3f97cbb | 7735 | |
6a7a9f01 | 7736 | add_AT_loc (die, attr_kind, loc_descriptor (rtl)); |
a3f97cbb JW |
7737 | } |
7738 | ||
7739 | /* Attach the specialized form of location attribute used for data | |
7740 | members of struct and union types. In the special case of a | |
7741 | FIELD_DECL node which represents a bit-field, the "offset" part | |
7742 | of this special location descriptor must indicate the distance | |
7743 | in bytes from the lowest-addressed byte of the containing struct | |
7744 | or union type to the lowest-addressed byte of the "containing | |
7745 | object" for the bit-field. (See the `field_byte_offset' function | |
7746 | above).. For any given bit-field, the "containing object" is a | |
7747 | hypothetical object (of some integral or enum type) within which | |
7748 | the given bit-field lives. The type of this hypothetical | |
7749 | "containing object" is always the same as the declared type of | |
7750 | the individual bit-field itself (for GCC anyway... the DWARF | |
7751 | spec doesn't actually mandate this). Note that it is the size | |
7752 | (in bytes) of the hypothetical "containing object" which will | |
7753 | be given in the DW_AT_byte_size attribute for this bit-field. | |
7754 | (See the `byte_size_attribute' function below.) It is also used | |
7755 | when calculating the value of the DW_AT_bit_offset attribute. | |
7756 | (See the `bit_offset_attribute' function below). */ | |
71dfc51f | 7757 | |
a3f97cbb JW |
7758 | static void |
7759 | add_data_member_location_attribute (die, decl) | |
7760 | register dw_die_ref die; | |
7761 | register tree decl; | |
7762 | { | |
61b32c02 | 7763 | register unsigned long offset; |
a3f97cbb JW |
7764 | register dw_loc_descr_ref loc_descr; |
7765 | register enum dwarf_location_atom op; | |
7766 | ||
61b32c02 | 7767 | if (TREE_CODE (decl) == TREE_VEC) |
665f2503 | 7768 | offset = tree_low_cst (BINFO_OFFSET (decl), 0); |
61b32c02 JM |
7769 | else |
7770 | offset = field_byte_offset (decl); | |
7771 | ||
a3f97cbb JW |
7772 | /* The DWARF2 standard says that we should assume that the structure address |
7773 | is already on the stack, so we can specify a structure field address | |
7774 | by using DW_OP_plus_uconst. */ | |
71dfc51f | 7775 | |
a3f97cbb JW |
7776 | #ifdef MIPS_DEBUGGING_INFO |
7777 | /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator | |
7778 | correctly. It works only if we leave the offset on the stack. */ | |
7779 | op = DW_OP_constu; | |
7780 | #else | |
7781 | op = DW_OP_plus_uconst; | |
7782 | #endif | |
71dfc51f | 7783 | |
a3f97cbb JW |
7784 | loc_descr = new_loc_descr (op, offset, 0); |
7785 | add_AT_loc (die, DW_AT_data_member_location, loc_descr); | |
7786 | } | |
7787 | ||
7788 | /* Attach an DW_AT_const_value attribute for a variable or a parameter which | |
7789 | does not have a "location" either in memory or in a register. These | |
7790 | things can arise in GNU C when a constant is passed as an actual parameter | |
7791 | to an inlined function. They can also arise in C++ where declared | |
7792 | constants do not necessarily get memory "homes". */ | |
71dfc51f | 7793 | |
a3f97cbb JW |
7794 | static void |
7795 | add_const_value_attribute (die, rtl) | |
7796 | register dw_die_ref die; | |
7797 | register rtx rtl; | |
7798 | { | |
7799 | switch (GET_CODE (rtl)) | |
7800 | { | |
7801 | case CONST_INT: | |
2e4b9b8c RH |
7802 | /* Note that a CONST_INT rtx could represent either an integer |
7803 | or a floating-point constant. A CONST_INT is used whenever | |
7804 | the constant will fit into a single word. In all such | |
7805 | cases, the original mode of the constant value is wiped | |
7806 | out, and the CONST_INT rtx is assigned VOIDmode. */ | |
7807 | { | |
7808 | HOST_WIDE_INT val = INTVAL (rtl); | |
7809 | ||
7810 | /* ??? We really should be using HOST_WIDE_INT throughout. */ | |
7811 | if (val < 0) | |
7812 | { | |
7813 | if ((long) val != val) | |
7814 | abort (); | |
7815 | add_AT_int (die, DW_AT_const_value, (long) val); | |
7816 | } | |
7817 | else | |
7818 | { | |
7819 | if ((unsigned long) val != (unsigned HOST_WIDE_INT) val) | |
7820 | abort (); | |
7821 | add_AT_int (die, DW_AT_const_value, (unsigned long) val); | |
7822 | } | |
7823 | } | |
a3f97cbb JW |
7824 | break; |
7825 | ||
7826 | case CONST_DOUBLE: | |
7827 | /* Note that a CONST_DOUBLE rtx could represent either an integer or a | |
7828 | floating-point constant. A CONST_DOUBLE is used whenever the | |
7829 | constant requires more than one word in order to be adequately | |
469ac993 JM |
7830 | represented. We output CONST_DOUBLEs as blocks. */ |
7831 | { | |
7832 | register enum machine_mode mode = GET_MODE (rtl); | |
7833 | ||
7834 | if (GET_MODE_CLASS (mode) == MODE_FLOAT) | |
7835 | { | |
e389897b | 7836 | register unsigned length = GET_MODE_SIZE (mode) / 4; |
1bfb5f8f | 7837 | long *array = (long *) xmalloc (sizeof (long) * length); |
71dfc51f | 7838 | REAL_VALUE_TYPE rv; |
469ac993 | 7839 | |
71dfc51f | 7840 | REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl); |
469ac993 JM |
7841 | switch (mode) |
7842 | { | |
7843 | case SFmode: | |
71dfc51f | 7844 | REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]); |
469ac993 JM |
7845 | break; |
7846 | ||
7847 | case DFmode: | |
71dfc51f | 7848 | REAL_VALUE_TO_TARGET_DOUBLE (rv, array); |
469ac993 JM |
7849 | break; |
7850 | ||
7851 | case XFmode: | |
7852 | case TFmode: | |
71dfc51f | 7853 | REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array); |
469ac993 JM |
7854 | break; |
7855 | ||
7856 | default: | |
7857 | abort (); | |
7858 | } | |
7859 | ||
469ac993 JM |
7860 | add_AT_float (die, DW_AT_const_value, length, array); |
7861 | } | |
7862 | else | |
2e4b9b8c RH |
7863 | { |
7864 | /* ??? We really should be using HOST_WIDE_INT throughout. */ | |
7865 | if (HOST_BITS_PER_LONG != HOST_BITS_PER_WIDE_INT) | |
7866 | abort (); | |
7867 | add_AT_long_long (die, DW_AT_const_value, | |
7868 | CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl)); | |
7869 | } | |
469ac993 | 7870 | } |
a3f97cbb JW |
7871 | break; |
7872 | ||
7873 | case CONST_STRING: | |
7874 | add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0)); | |
7875 | break; | |
7876 | ||
7877 | case SYMBOL_REF: | |
7878 | case LABEL_REF: | |
7879 | case CONST: | |
1865dbb5 | 7880 | add_AT_addr (die, DW_AT_const_value, save_rtx (rtl)); |
a3f97cbb JW |
7881 | break; |
7882 | ||
7883 | case PLUS: | |
7884 | /* In cases where an inlined instance of an inline function is passed | |
7885 | the address of an `auto' variable (which is local to the caller) we | |
7886 | can get a situation where the DECL_RTL of the artificial local | |
7887 | variable (for the inlining) which acts as a stand-in for the | |
7888 | corresponding formal parameter (of the inline function) will look | |
7889 | like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not | |
556273e0 KH |
7890 | exactly a compile-time constant expression, but it isn't the address |
7891 | of the (artificial) local variable either. Rather, it represents the | |
a3f97cbb | 7892 | *value* which the artificial local variable always has during its |
556273e0 | 7893 | lifetime. We currently have no way to represent such quasi-constant |
6a7a9f01 | 7894 | values in Dwarf, so for now we just punt and generate nothing. */ |
a3f97cbb JW |
7895 | break; |
7896 | ||
7897 | default: | |
7898 | /* No other kinds of rtx should be possible here. */ | |
7899 | abort (); | |
7900 | } | |
7901 | ||
7902 | } | |
7903 | ||
d8041cc8 RH |
7904 | static rtx |
7905 | rtl_for_decl_location (decl) | |
7906 | tree decl; | |
a3f97cbb JW |
7907 | { |
7908 | register rtx rtl; | |
71dfc51f | 7909 | |
a3f97cbb JW |
7910 | /* Here we have to decide where we are going to say the parameter "lives" |
7911 | (as far as the debugger is concerned). We only have a couple of | |
7912 | choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL. | |
71dfc51f | 7913 | |
556273e0 | 7914 | DECL_RTL normally indicates where the parameter lives during most of the |
71dfc51f | 7915 | activation of the function. If optimization is enabled however, this |
556273e0 | 7916 | could be either NULL or else a pseudo-reg. Both of those cases indicate |
a3f97cbb JW |
7917 | that the parameter doesn't really live anywhere (as far as the code |
7918 | generation parts of GCC are concerned) during most of the function's | |
7919 | activation. That will happen (for example) if the parameter is never | |
71dfc51f RK |
7920 | referenced within the function. |
7921 | ||
7922 | We could just generate a location descriptor here for all non-NULL | |
7923 | non-pseudo values of DECL_RTL and ignore all of the rest, but we can be | |
7924 | a little nicer than that if we also consider DECL_INCOMING_RTL in cases | |
7925 | where DECL_RTL is NULL or is a pseudo-reg. | |
7926 | ||
7927 | Note however that we can only get away with using DECL_INCOMING_RTL as | |
7928 | a backup substitute for DECL_RTL in certain limited cases. In cases | |
7929 | where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl), | |
7930 | we can be sure that the parameter was passed using the same type as it is | |
7931 | declared to have within the function, and that its DECL_INCOMING_RTL | |
7932 | points us to a place where a value of that type is passed. | |
7933 | ||
7934 | In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different, | |
7935 | we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL | |
7936 | because in these cases DECL_INCOMING_RTL points us to a value of some | |
7937 | type which is *different* from the type of the parameter itself. Thus, | |
7938 | if we tried to use DECL_INCOMING_RTL to generate a location attribute in | |
7939 | such cases, the debugger would end up (for example) trying to fetch a | |
7940 | `float' from a place which actually contains the first part of a | |
7941 | `double'. That would lead to really incorrect and confusing | |
7942 | output at debug-time. | |
7943 | ||
7944 | So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL | |
7945 | in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There | |
7946 | are a couple of exceptions however. On little-endian machines we can | |
7947 | get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is | |
7948 | not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is | |
7949 | an integral type that is smaller than TREE_TYPE (decl). These cases arise | |
7950 | when (on a little-endian machine) a non-prototyped function has a | |
7951 | parameter declared to be of type `short' or `char'. In such cases, | |
7952 | TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will | |
7953 | be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the | |
7954 | passed `int' value. If the debugger then uses that address to fetch | |
7955 | a `short' or a `char' (on a little-endian machine) the result will be | |
7956 | the correct data, so we allow for such exceptional cases below. | |
7957 | ||
7958 | Note that our goal here is to describe the place where the given formal | |
7959 | parameter lives during most of the function's activation (i.e. between | |
7960 | the end of the prologue and the start of the epilogue). We'll do that | |
7961 | as best as we can. Note however that if the given formal parameter is | |
7962 | modified sometime during the execution of the function, then a stack | |
7963 | backtrace (at debug-time) will show the function as having been | |
7964 | called with the *new* value rather than the value which was | |
7965 | originally passed in. This happens rarely enough that it is not | |
7966 | a major problem, but it *is* a problem, and I'd like to fix it. | |
7967 | ||
7968 | A future version of dwarf2out.c may generate two additional | |
7969 | attributes for any given DW_TAG_formal_parameter DIE which will | |
7970 | describe the "passed type" and the "passed location" for the | |
7971 | given formal parameter in addition to the attributes we now | |
7972 | generate to indicate the "declared type" and the "active | |
7973 | location" for each parameter. This additional set of attributes | |
7974 | could be used by debuggers for stack backtraces. Separately, note | |
7975 | that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be | |
7976 | NULL also. This happens (for example) for inlined-instances of | |
7977 | inline function formal parameters which are never referenced. | |
7978 | This really shouldn't be happening. All PARM_DECL nodes should | |
7979 | get valid non-NULL DECL_INCOMING_RTL values, but integrate.c | |
7980 | doesn't currently generate these values for inlined instances of | |
7981 | inline function parameters, so when we see such cases, we are | |
956d6950 | 7982 | just out-of-luck for the time being (until integrate.c |
a3f97cbb JW |
7983 | gets fixed). */ |
7984 | ||
7985 | /* Use DECL_RTL as the "location" unless we find something better. */ | |
7986 | rtl = DECL_RTL (decl); | |
7987 | ||
7988 | if (TREE_CODE (decl) == PARM_DECL) | |
7989 | { | |
7990 | if (rtl == NULL_RTX || is_pseudo_reg (rtl)) | |
7991 | { | |
d8041cc8 RH |
7992 | tree declared_type = type_main_variant (TREE_TYPE (decl)); |
7993 | tree passed_type = type_main_variant (DECL_ARG_TYPE (decl)); | |
a3f97cbb | 7994 | |
71dfc51f | 7995 | /* This decl represents a formal parameter which was optimized out. |
a3f97cbb JW |
7996 | Note that DECL_INCOMING_RTL may be NULL in here, but we handle |
7997 | all* cases where (rtl == NULL_RTX) just below. */ | |
7998 | if (declared_type == passed_type) | |
71dfc51f RK |
7999 | rtl = DECL_INCOMING_RTL (decl); |
8000 | else if (! BYTES_BIG_ENDIAN | |
8001 | && TREE_CODE (declared_type) == INTEGER_TYPE | |
555b6442 HPN |
8002 | && (GET_MODE_SIZE (TYPE_MODE (declared_type)) |
8003 | <= GET_MODE_SIZE (TYPE_MODE (passed_type)))) | |
556273e0 | 8004 | rtl = DECL_INCOMING_RTL (decl); |
a3f97cbb | 8005 | } |
5a904a61 JW |
8006 | |
8007 | /* If the parm was passed in registers, but lives on the stack, then | |
8008 | make a big endian correction if the mode of the type of the | |
8009 | parameter is not the same as the mode of the rtl. */ | |
8010 | /* ??? This is the same series of checks that are made in dbxout.c before | |
8011 | we reach the big endian correction code there. It isn't clear if all | |
8012 | of these checks are necessary here, but keeping them all is the safe | |
8013 | thing to do. */ | |
8014 | else if (GET_CODE (rtl) == MEM | |
8015 | && XEXP (rtl, 0) != const0_rtx | |
8016 | && ! CONSTANT_P (XEXP (rtl, 0)) | |
8017 | /* Not passed in memory. */ | |
8018 | && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM | |
8019 | /* Not passed by invisible reference. */ | |
8020 | && (GET_CODE (XEXP (rtl, 0)) != REG | |
8021 | || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM | |
8022 | || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM | |
8023 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
8024 | || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM | |
8025 | #endif | |
8026 | ) | |
8027 | /* Big endian correction check. */ | |
8028 | && BYTES_BIG_ENDIAN | |
8029 | && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl) | |
8030 | && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))) | |
8031 | < UNITS_PER_WORD)) | |
8032 | { | |
8033 | int offset = (UNITS_PER_WORD | |
8034 | - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))); | |
8035 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), | |
8036 | plus_constant (XEXP (rtl, 0), offset)); | |
8037 | } | |
a3f97cbb | 8038 | } |
71dfc51f | 8039 | |
d8041cc8 RH |
8040 | if (rtl != NULL_RTX) |
8041 | { | |
8042 | rtl = eliminate_regs (rtl, 0, NULL_RTX); | |
6a7a9f01 | 8043 | #ifdef LEAF_REG_REMAP |
d8041cc8 RH |
8044 | if (current_function_uses_only_leaf_regs) |
8045 | leaf_renumber_regs_insn (rtl); | |
6a7a9f01 | 8046 | #endif |
d8041cc8 RH |
8047 | } |
8048 | ||
8049 | return rtl; | |
8050 | } | |
8051 | ||
8052 | /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value | |
8053 | data attribute for a variable or a parameter. We generate the | |
8054 | DW_AT_const_value attribute only in those cases where the given variable | |
8055 | or parameter does not have a true "location" either in memory or in a | |
8056 | register. This can happen (for example) when a constant is passed as an | |
8057 | actual argument in a call to an inline function. (It's possible that | |
8058 | these things can crop up in other ways also.) Note that one type of | |
8059 | constant value which can be passed into an inlined function is a constant | |
8060 | pointer. This can happen for example if an actual argument in an inlined | |
8061 | function call evaluates to a compile-time constant address. */ | |
8062 | ||
8063 | static void | |
8064 | add_location_or_const_value_attribute (die, decl) | |
8065 | register dw_die_ref die; | |
8066 | register tree decl; | |
8067 | { | |
8068 | register rtx rtl; | |
8069 | ||
8070 | if (TREE_CODE (decl) == ERROR_MARK) | |
8071 | return; | |
8072 | ||
8073 | if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL) | |
8074 | abort (); | |
8075 | ||
8076 | rtl = rtl_for_decl_location (decl); | |
a97c9600 RH |
8077 | if (rtl == NULL_RTX) |
8078 | return; | |
6a7a9f01 | 8079 | |
a3f97cbb JW |
8080 | switch (GET_CODE (rtl)) |
8081 | { | |
e9a25f70 JL |
8082 | case ADDRESSOF: |
8083 | /* The address of a variable that was optimized away; don't emit | |
8084 | anything. */ | |
8085 | break; | |
8086 | ||
a3f97cbb JW |
8087 | case CONST_INT: |
8088 | case CONST_DOUBLE: | |
8089 | case CONST_STRING: | |
8090 | case SYMBOL_REF: | |
8091 | case LABEL_REF: | |
8092 | case CONST: | |
8093 | case PLUS: | |
8094 | /* DECL_RTL could be (plus (reg ...) (const_int ...)) */ | |
8095 | add_const_value_attribute (die, rtl); | |
8096 | break; | |
8097 | ||
8098 | case MEM: | |
8099 | case REG: | |
8100 | case SUBREG: | |
4401bf24 | 8101 | case CONCAT: |
ef76d03b | 8102 | add_AT_location_description (die, DW_AT_location, rtl); |
a3f97cbb JW |
8103 | break; |
8104 | ||
8105 | default: | |
71dfc51f | 8106 | abort (); |
a3f97cbb JW |
8107 | } |
8108 | } | |
8109 | ||
1bfb5f8f JM |
8110 | /* If we don't have a copy of this variable in memory for some reason (such |
8111 | as a C++ member constant that doesn't have an out-of-line definition), | |
8112 | we should tell the debugger about the constant value. */ | |
8113 | ||
8114 | static void | |
8115 | tree_add_const_value_attribute (var_die, decl) | |
8116 | dw_die_ref var_die; | |
8117 | tree decl; | |
8118 | { | |
8119 | tree init = DECL_INITIAL (decl); | |
8120 | tree type = TREE_TYPE (decl); | |
8121 | ||
8122 | if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl) && init | |
8123 | && initializer_constant_valid_p (init, type) == null_pointer_node) | |
8124 | /* OK */; | |
8125 | else | |
8126 | return; | |
8127 | ||
8128 | switch (TREE_CODE (type)) | |
8129 | { | |
8130 | case INTEGER_TYPE: | |
8131 | if (host_integerp (init, 0)) | |
8132 | add_AT_unsigned (var_die, DW_AT_const_value, | |
8133 | TREE_INT_CST_LOW (init)); | |
8134 | else | |
8135 | add_AT_long_long (var_die, DW_AT_const_value, | |
8136 | TREE_INT_CST_HIGH (init), | |
8137 | TREE_INT_CST_LOW (init)); | |
8138 | break; | |
8139 | ||
8140 | default:; | |
8141 | } | |
8142 | } | |
0b34cf1e | 8143 | |
a3f97cbb JW |
8144 | /* Generate an DW_AT_name attribute given some string value to be included as |
8145 | the value of the attribute. */ | |
71dfc51f RK |
8146 | |
8147 | static inline void | |
a3f97cbb JW |
8148 | add_name_attribute (die, name_string) |
8149 | register dw_die_ref die; | |
d560ee52 | 8150 | register const char *name_string; |
a3f97cbb | 8151 | { |
71dfc51f | 8152 | if (name_string != NULL && *name_string != 0) |
14a774a9 RK |
8153 | { |
8154 | if (demangle_name_func) | |
8155 | name_string = (*demangle_name_func) (name_string); | |
8156 | ||
8157 | add_AT_string (die, DW_AT_name, name_string); | |
8158 | } | |
a3f97cbb JW |
8159 | } |
8160 | ||
8161 | /* Given a tree node describing an array bound (either lower or upper) output | |
466446b0 | 8162 | a representation for that bound. */ |
71dfc51f | 8163 | |
a3f97cbb JW |
8164 | static void |
8165 | add_bound_info (subrange_die, bound_attr, bound) | |
8166 | register dw_die_ref subrange_die; | |
8167 | register enum dwarf_attribute bound_attr; | |
8168 | register tree bound; | |
8169 | { | |
ef76d03b JW |
8170 | /* If this is an Ada unconstrained array type, then don't emit any debug |
8171 | info because the array bounds are unknown. They are parameterized when | |
8172 | the type is instantiated. */ | |
8173 | if (contains_placeholder_p (bound)) | |
8174 | return; | |
8175 | ||
a3f97cbb JW |
8176 | switch (TREE_CODE (bound)) |
8177 | { | |
8178 | case ERROR_MARK: | |
8179 | return; | |
8180 | ||
8181 | /* All fixed-bounds are represented by INTEGER_CST nodes. */ | |
8182 | case INTEGER_CST: | |
665f2503 RK |
8183 | if (! host_integerp (bound, 0) |
8184 | || (bound_attr == DW_AT_lower_bound | |
28985b81 | 8185 | && (((is_c_family () || is_java ()) && integer_zerop (bound)) |
665f2503 RK |
8186 | || (is_fortran () && integer_onep (bound))))) |
8187 | /* use the default */ | |
8188 | ; | |
141719a8 | 8189 | else |
665f2503 | 8190 | add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0)); |
a3f97cbb JW |
8191 | break; |
8192 | ||
b1ccbc24 | 8193 | case CONVERT_EXPR: |
a3f97cbb | 8194 | case NOP_EXPR: |
b1ccbc24 RK |
8195 | case NON_LVALUE_EXPR: |
8196 | add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0)); | |
8197 | break; | |
556273e0 | 8198 | |
a3f97cbb JW |
8199 | case SAVE_EXPR: |
8200 | /* If optimization is turned on, the SAVE_EXPRs that describe how to | |
466446b0 JM |
8201 | access the upper bound values may be bogus. If they refer to a |
8202 | register, they may only describe how to get at these values at the | |
8203 | points in the generated code right after they have just been | |
8204 | computed. Worse yet, in the typical case, the upper bound values | |
8205 | will not even *be* computed in the optimized code (though the | |
8206 | number of elements will), so these SAVE_EXPRs are entirely | |
8207 | bogus. In order to compensate for this fact, we check here to see | |
8208 | if optimization is enabled, and if so, we don't add an attribute | |
8209 | for the (unknown and unknowable) upper bound. This should not | |
8210 | cause too much trouble for existing (stupid?) debuggers because | |
8211 | they have to deal with empty upper bounds location descriptions | |
8212 | anyway in order to be able to deal with incomplete array types. | |
8213 | Of course an intelligent debugger (GDB?) should be able to | |
8214 | comprehend that a missing upper bound specification in a array | |
8215 | type used for a storage class `auto' local array variable | |
8216 | indicates that the upper bound is both unknown (at compile- time) | |
8217 | and unknowable (at run-time) due to optimization. | |
8218 | ||
8219 | We assume that a MEM rtx is safe because gcc wouldn't put the | |
8220 | value there unless it was going to be used repeatedly in the | |
8221 | function, i.e. for cleanups. */ | |
1edf43d6 JM |
8222 | if (SAVE_EXPR_RTL (bound) |
8223 | && (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)) | |
a3f97cbb | 8224 | { |
466446b0 JM |
8225 | register dw_die_ref ctx = lookup_decl_die (current_function_decl); |
8226 | register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx); | |
f5963e61 JL |
8227 | register rtx loc = SAVE_EXPR_RTL (bound); |
8228 | ||
8229 | /* If the RTL for the SAVE_EXPR is memory, handle the case where | |
8230 | it references an outer function's frame. */ | |
8231 | ||
8232 | if (GET_CODE (loc) == MEM) | |
8233 | { | |
8234 | rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound); | |
8235 | ||
8236 | if (XEXP (loc, 0) != new_addr) | |
c5c76735 | 8237 | loc = gen_rtx_MEM (GET_MODE (loc), new_addr); |
f5963e61 JL |
8238 | } |
8239 | ||
466446b0 JM |
8240 | add_AT_flag (decl_die, DW_AT_artificial, 1); |
8241 | add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx); | |
f5963e61 | 8242 | add_AT_location_description (decl_die, DW_AT_location, loc); |
466446b0 | 8243 | add_AT_die_ref (subrange_die, bound_attr, decl_die); |
a3f97cbb | 8244 | } |
71dfc51f RK |
8245 | |
8246 | /* Else leave out the attribute. */ | |
a3f97cbb | 8247 | break; |
3f76745e | 8248 | |
ef76d03b | 8249 | case VAR_DECL: |
d8041cc8 RH |
8250 | case PARM_DECL: |
8251 | { | |
8252 | dw_die_ref decl_die = lookup_decl_die (bound); | |
8253 | ||
8254 | /* ??? Can this happen, or should the variable have been bound | |
8255 | first? Probably it can, since I imagine that we try to create | |
8256 | the types of parameters in the order in which they exist in | |
0b34cf1e | 8257 | the list, and won't have created a forward reference to a |
d8041cc8 RH |
8258 | later parameter. */ |
8259 | if (decl_die != NULL) | |
8260 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
8261 | break; | |
8262 | } | |
ef76d03b | 8263 | |
3f76745e | 8264 | default: |
d8041cc8 RH |
8265 | { |
8266 | /* Otherwise try to create a stack operation procedure to | |
8267 | evaluate the value of the array bound. */ | |
8268 | ||
8269 | dw_die_ref ctx, decl_die; | |
8270 | dw_loc_descr_ref loc; | |
8271 | ||
8272 | loc = loc_descriptor_from_tree (bound, 0); | |
8273 | if (loc == NULL) | |
8274 | break; | |
8275 | ||
8276 | ctx = lookup_decl_die (current_function_decl); | |
8277 | ||
8278 | decl_die = new_die (DW_TAG_variable, ctx); | |
8279 | add_AT_flag (decl_die, DW_AT_artificial, 1); | |
8280 | add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx); | |
8281 | add_AT_loc (decl_die, DW_AT_location, loc); | |
8282 | ||
8283 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
8284 | break; | |
8285 | } | |
a3f97cbb JW |
8286 | } |
8287 | } | |
8288 | ||
8289 | /* Note that the block of subscript information for an array type also | |
8290 | includes information about the element type of type given array type. */ | |
71dfc51f | 8291 | |
a3f97cbb JW |
8292 | static void |
8293 | add_subscript_info (type_die, type) | |
8294 | register dw_die_ref type_die; | |
8295 | register tree type; | |
8296 | { | |
081f5e7e | 8297 | #ifndef MIPS_DEBUGGING_INFO |
a3f97cbb | 8298 | register unsigned dimension_number; |
081f5e7e | 8299 | #endif |
a3f97cbb JW |
8300 | register tree lower, upper; |
8301 | register dw_die_ref subrange_die; | |
8302 | ||
556273e0 | 8303 | /* The GNU compilers represent multidimensional array types as sequences of |
a3f97cbb JW |
8304 | one dimensional array types whose element types are themselves array |
8305 | types. Here we squish that down, so that each multidimensional array | |
556273e0 | 8306 | type gets only one array_type DIE in the Dwarf debugging info. The draft |
a3f97cbb JW |
8307 | Dwarf specification say that we are allowed to do this kind of |
8308 | compression in C (because there is no difference between an array or | |
556273e0 | 8309 | arrays and a multidimensional array in C) but for other source languages |
a3f97cbb | 8310 | (e.g. Ada) we probably shouldn't do this. */ |
71dfc51f | 8311 | |
a3f97cbb JW |
8312 | /* ??? The SGI dwarf reader fails for multidimensional arrays with a |
8313 | const enum type. E.g. const enum machine_mode insn_operand_mode[2][10]. | |
8314 | We work around this by disabling this feature. See also | |
8315 | gen_array_type_die. */ | |
8316 | #ifndef MIPS_DEBUGGING_INFO | |
8317 | for (dimension_number = 0; | |
8318 | TREE_CODE (type) == ARRAY_TYPE; | |
8319 | type = TREE_TYPE (type), dimension_number++) | |
8320 | { | |
8321 | #endif | |
8322 | register tree domain = TYPE_DOMAIN (type); | |
8323 | ||
8324 | /* Arrays come in three flavors: Unspecified bounds, fixed bounds, | |
556273e0 | 8325 | and (in GNU C only) variable bounds. Handle all three forms |
a3f97cbb JW |
8326 | here. */ |
8327 | subrange_die = new_die (DW_TAG_subrange_type, type_die); | |
8328 | if (domain) | |
8329 | { | |
8330 | /* We have an array type with specified bounds. */ | |
8331 | lower = TYPE_MIN_VALUE (domain); | |
8332 | upper = TYPE_MAX_VALUE (domain); | |
8333 | ||
a9d38797 JM |
8334 | /* define the index type. */ |
8335 | if (TREE_TYPE (domain)) | |
ef76d03b JW |
8336 | { |
8337 | /* ??? This is probably an Ada unnamed subrange type. Ignore the | |
8338 | TREE_TYPE field. We can't emit debug info for this | |
8339 | because it is an unnamed integral type. */ | |
8340 | if (TREE_CODE (domain) == INTEGER_TYPE | |
8341 | && TYPE_NAME (domain) == NULL_TREE | |
8342 | && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE | |
8343 | && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE) | |
556273e0 | 8344 | ; |
ef76d03b JW |
8345 | else |
8346 | add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0, | |
8347 | type_die); | |
8348 | } | |
a9d38797 | 8349 | |
e1ee5cdc RH |
8350 | /* ??? If upper is NULL, the array has unspecified length, |
8351 | but it does have a lower bound. This happens with Fortran | |
8352 | dimension arr(N:*) | |
8353 | Since the debugger is definitely going to need to know N | |
8354 | to produce useful results, go ahead and output the lower | |
8355 | bound solo, and hope the debugger can cope. */ | |
8356 | ||
141719a8 | 8357 | add_bound_info (subrange_die, DW_AT_lower_bound, lower); |
e1ee5cdc RH |
8358 | if (upper) |
8359 | add_bound_info (subrange_die, DW_AT_upper_bound, upper); | |
a3f97cbb JW |
8360 | } |
8361 | else | |
71dfc51f | 8362 | /* We have an array type with an unspecified length. The DWARF-2 |
a9d38797 JM |
8363 | spec does not say how to handle this; let's just leave out the |
8364 | bounds. */ | |
e49a1d2e | 8365 | {;} |
71dfc51f | 8366 | |
a3f97cbb JW |
8367 | #ifndef MIPS_DEBUGGING_INFO |
8368 | } | |
8369 | #endif | |
8370 | } | |
8371 | ||
8372 | static void | |
8373 | add_byte_size_attribute (die, tree_node) | |
8374 | dw_die_ref die; | |
8375 | register tree tree_node; | |
8376 | { | |
8377 | register unsigned size; | |
8378 | ||
8379 | switch (TREE_CODE (tree_node)) | |
8380 | { | |
8381 | case ERROR_MARK: | |
8382 | size = 0; | |
8383 | break; | |
8384 | case ENUMERAL_TYPE: | |
8385 | case RECORD_TYPE: | |
8386 | case UNION_TYPE: | |
8387 | case QUAL_UNION_TYPE: | |
8388 | size = int_size_in_bytes (tree_node); | |
8389 | break; | |
8390 | case FIELD_DECL: | |
8391 | /* For a data member of a struct or union, the DW_AT_byte_size is | |
8392 | generally given as the number of bytes normally allocated for an | |
8393 | object of the *declared* type of the member itself. This is true | |
8394 | even for bit-fields. */ | |
8395 | size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT; | |
8396 | break; | |
8397 | default: | |
8398 | abort (); | |
8399 | } | |
8400 | ||
8401 | /* Note that `size' might be -1 when we get to this point. If it is, that | |
8402 | indicates that the byte size of the entity in question is variable. We | |
8403 | have no good way of expressing this fact in Dwarf at the present time, | |
8404 | so just let the -1 pass on through. */ | |
8405 | ||
8406 | add_AT_unsigned (die, DW_AT_byte_size, size); | |
8407 | } | |
8408 | ||
8409 | /* For a FIELD_DECL node which represents a bit-field, output an attribute | |
8410 | which specifies the distance in bits from the highest order bit of the | |
8411 | "containing object" for the bit-field to the highest order bit of the | |
8412 | bit-field itself. | |
8413 | ||
b2932ae5 JM |
8414 | For any given bit-field, the "containing object" is a hypothetical |
8415 | object (of some integral or enum type) within which the given bit-field | |
8416 | lives. The type of this hypothetical "containing object" is always the | |
8417 | same as the declared type of the individual bit-field itself. The | |
8418 | determination of the exact location of the "containing object" for a | |
8419 | bit-field is rather complicated. It's handled by the | |
8420 | `field_byte_offset' function (above). | |
a3f97cbb JW |
8421 | |
8422 | Note that it is the size (in bytes) of the hypothetical "containing object" | |
8423 | which will be given in the DW_AT_byte_size attribute for this bit-field. | |
8424 | (See `byte_size_attribute' above). */ | |
71dfc51f RK |
8425 | |
8426 | static inline void | |
a3f97cbb JW |
8427 | add_bit_offset_attribute (die, decl) |
8428 | register dw_die_ref die; | |
8429 | register tree decl; | |
8430 | { | |
665f2503 RK |
8431 | HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl); |
8432 | tree type = DECL_BIT_FIELD_TYPE (decl); | |
8433 | HOST_WIDE_INT bitpos_int; | |
8434 | HOST_WIDE_INT highest_order_object_bit_offset; | |
8435 | HOST_WIDE_INT highest_order_field_bit_offset; | |
8436 | HOST_WIDE_INT unsigned bit_offset; | |
a3f97cbb | 8437 | |
3a88cbd1 JL |
8438 | /* Must be a field and a bit field. */ |
8439 | if (!type | |
8440 | || TREE_CODE (decl) != FIELD_DECL) | |
8441 | abort (); | |
a3f97cbb JW |
8442 | |
8443 | /* We can't yet handle bit-fields whose offsets are variable, so if we | |
8444 | encounter such things, just return without generating any attribute | |
665f2503 RK |
8445 | whatsoever. Likewise for variable or too large size. */ |
8446 | if (! host_integerp (bit_position (decl), 0) | |
8447 | || ! host_integerp (DECL_SIZE (decl), 1)) | |
71dfc51f RK |
8448 | return; |
8449 | ||
665f2503 | 8450 | bitpos_int = int_bit_position (decl); |
a3f97cbb JW |
8451 | |
8452 | /* Note that the bit offset is always the distance (in bits) from the | |
556273e0 KH |
8453 | highest-order bit of the "containing object" to the highest-order bit of |
8454 | the bit-field itself. Since the "high-order end" of any object or field | |
a3f97cbb JW |
8455 | is different on big-endian and little-endian machines, the computation |
8456 | below must take account of these differences. */ | |
8457 | highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT; | |
8458 | highest_order_field_bit_offset = bitpos_int; | |
8459 | ||
71dfc51f | 8460 | if (! BYTES_BIG_ENDIAN) |
a3f97cbb | 8461 | { |
665f2503 | 8462 | highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0); |
a3f97cbb JW |
8463 | highest_order_object_bit_offset += simple_type_size_in_bits (type); |
8464 | } | |
71dfc51f RK |
8465 | |
8466 | bit_offset | |
8467 | = (! BYTES_BIG_ENDIAN | |
8468 | ? highest_order_object_bit_offset - highest_order_field_bit_offset | |
8469 | : highest_order_field_bit_offset - highest_order_object_bit_offset); | |
a3f97cbb JW |
8470 | |
8471 | add_AT_unsigned (die, DW_AT_bit_offset, bit_offset); | |
8472 | } | |
8473 | ||
8474 | /* For a FIELD_DECL node which represents a bit field, output an attribute | |
8475 | which specifies the length in bits of the given field. */ | |
71dfc51f RK |
8476 | |
8477 | static inline void | |
a3f97cbb JW |
8478 | add_bit_size_attribute (die, decl) |
8479 | register dw_die_ref die; | |
8480 | register tree decl; | |
8481 | { | |
3a88cbd1 JL |
8482 | /* Must be a field and a bit field. */ |
8483 | if (TREE_CODE (decl) != FIELD_DECL | |
8484 | || ! DECL_BIT_FIELD_TYPE (decl)) | |
8485 | abort (); | |
665f2503 RK |
8486 | |
8487 | if (host_integerp (DECL_SIZE (decl), 1)) | |
8488 | add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1)); | |
a3f97cbb JW |
8489 | } |
8490 | ||
88dad228 | 8491 | /* If the compiled language is ANSI C, then add a 'prototyped' |
a3f97cbb | 8492 | attribute, if arg types are given for the parameters of a function. */ |
71dfc51f RK |
8493 | |
8494 | static inline void | |
a3f97cbb JW |
8495 | add_prototyped_attribute (die, func_type) |
8496 | register dw_die_ref die; | |
8497 | register tree func_type; | |
8498 | { | |
88dad228 JM |
8499 | if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89 |
8500 | && TYPE_ARG_TYPES (func_type) != NULL) | |
8501 | add_AT_flag (die, DW_AT_prototyped, 1); | |
a3f97cbb JW |
8502 | } |
8503 | ||
a3f97cbb JW |
8504 | /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found |
8505 | by looking in either the type declaration or object declaration | |
8506 | equate table. */ | |
71dfc51f RK |
8507 | |
8508 | static inline void | |
a3f97cbb JW |
8509 | add_abstract_origin_attribute (die, origin) |
8510 | register dw_die_ref die; | |
8511 | register tree origin; | |
8512 | { | |
8513 | dw_die_ref origin_die = NULL; | |
bbc6ae08 | 8514 | |
d10b8e05 | 8515 | if (TREE_CODE (origin) != FUNCTION_DECL) |
e40a1c67 JM |
8516 | { |
8517 | /* We may have gotten separated from the block for the inlined | |
8518 | function, if we're in an exception handler or some such; make | |
8519 | sure that the abstract function has been written out. | |
8520 | ||
8521 | Doing this for nested functions is wrong, however; functions are | |
8522 | distinct units, and our context might not even be inline. */ | |
fb13d4d0 JM |
8523 | tree fn = origin; |
8524 | if (TYPE_P (fn)) | |
8525 | fn = TYPE_STUB_DECL (fn); | |
8526 | fn = decl_function_context (fn); | |
e40a1c67 | 8527 | if (fn) |
1edf43d6 | 8528 | dwarf2out_abstract_function (fn); |
e40a1c67 | 8529 | } |
44db1d9c | 8530 | |
2f939d94 | 8531 | if (DECL_P (origin)) |
71dfc51f | 8532 | origin_die = lookup_decl_die (origin); |
2f939d94 | 8533 | else if (TYPE_P (origin)) |
71dfc51f RK |
8534 | origin_die = lookup_type_die (origin); |
8535 | ||
bbc6ae08 | 8536 | if (origin_die == NULL) |
1ae8994f | 8537 | abort (); |
556273e0 | 8538 | |
a3f97cbb JW |
8539 | add_AT_die_ref (die, DW_AT_abstract_origin, origin_die); |
8540 | } | |
8541 | ||
bdb669cb JM |
8542 | /* We do not currently support the pure_virtual attribute. */ |
8543 | ||
71dfc51f | 8544 | static inline void |
a3f97cbb JW |
8545 | add_pure_or_virtual_attribute (die, func_decl) |
8546 | register dw_die_ref die; | |
8547 | register tree func_decl; | |
8548 | { | |
a94dbf2c | 8549 | if (DECL_VINDEX (func_decl)) |
a3f97cbb | 8550 | { |
bdb669cb | 8551 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); |
665f2503 RK |
8552 | |
8553 | if (host_integerp (DECL_VINDEX (func_decl), 0)) | |
8554 | add_AT_loc (die, DW_AT_vtable_elem_location, | |
8555 | new_loc_descr (DW_OP_constu, | |
8556 | tree_low_cst (DECL_VINDEX (func_decl), 0), | |
8557 | 0)); | |
71dfc51f | 8558 | |
a94dbf2c JM |
8559 | /* GNU extension: Record what type this method came from originally. */ |
8560 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
8561 | add_AT_die_ref (die, DW_AT_containing_type, | |
8562 | lookup_type_die (DECL_CONTEXT (func_decl))); | |
a3f97cbb JW |
8563 | } |
8564 | } | |
8565 | \f | |
b2932ae5 | 8566 | /* Add source coordinate attributes for the given decl. */ |
71dfc51f | 8567 | |
b2932ae5 JM |
8568 | static void |
8569 | add_src_coords_attributes (die, decl) | |
8570 | register dw_die_ref die; | |
8571 | register tree decl; | |
8572 | { | |
2e18bbae RH |
8573 | register unsigned file_index = lookup_filename (&decl_file_table, |
8574 | DECL_SOURCE_FILE (decl)); | |
71dfc51f | 8575 | |
b2932ae5 JM |
8576 | add_AT_unsigned (die, DW_AT_decl_file, file_index); |
8577 | add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl)); | |
8578 | } | |
8579 | ||
a3f97cbb JW |
8580 | /* Add an DW_AT_name attribute and source coordinate attribute for the |
8581 | given decl, but only if it actually has a name. */ | |
71dfc51f | 8582 | |
a3f97cbb JW |
8583 | static void |
8584 | add_name_and_src_coords_attributes (die, decl) | |
8585 | register dw_die_ref die; | |
8586 | register tree decl; | |
8587 | { | |
61b32c02 | 8588 | register tree decl_name; |
71dfc51f | 8589 | |
556273e0 | 8590 | decl_name = DECL_NAME (decl); |
71dfc51f | 8591 | if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL) |
a3f97cbb | 8592 | { |
a1d7ffe3 | 8593 | add_name_attribute (die, dwarf2_name (decl, 0)); |
a96c67ec JM |
8594 | if (! DECL_ARTIFICIAL (decl)) |
8595 | add_src_coords_attributes (die, decl); | |
e689ae67 | 8596 | |
a1d7ffe3 | 8597 | if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL) |
bc808e0b | 8598 | && TREE_PUBLIC (decl) |
5daf7c0a JM |
8599 | && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl) |
8600 | && !DECL_ABSTRACT (decl)) | |
a1d7ffe3 JM |
8601 | add_AT_string (die, DW_AT_MIPS_linkage_name, |
8602 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); | |
a3f97cbb JW |
8603 | } |
8604 | } | |
8605 | ||
556273e0 | 8606 | /* Push a new declaration scope. */ |
71dfc51f | 8607 | |
a3f97cbb JW |
8608 | static void |
8609 | push_decl_scope (scope) | |
8610 | tree scope; | |
8611 | { | |
8612 | /* Make room in the decl_scope_table, if necessary. */ | |
8613 | if (decl_scope_table_allocated == decl_scope_depth) | |
8614 | { | |
8615 | decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT; | |
71dfc51f | 8616 | decl_scope_table |
777ad4c2 JM |
8617 | = (tree *) xrealloc (decl_scope_table, |
8618 | decl_scope_table_allocated * sizeof (tree)); | |
a3f97cbb | 8619 | } |
71dfc51f | 8620 | |
777ad4c2 | 8621 | decl_scope_table[decl_scope_depth] = scope; |
e3e7774e | 8622 | decl_scope_depth++; |
a3f97cbb JW |
8623 | } |
8624 | ||
777ad4c2 JM |
8625 | /* Pop a declaration scope. */ |
8626 | static inline void | |
8627 | pop_decl_scope () | |
8628 | { | |
8629 | if (decl_scope_depth <= 0) | |
8630 | abort (); | |
8631 | --decl_scope_depth; | |
8632 | } | |
8633 | ||
8634 | /* Return the DIE for the scope that immediately contains this type. | |
8635 | Non-named types get global scope. Named types nested in other | |
8636 | types get their containing scope if it's open, or global scope | |
8637 | otherwise. All other types (i.e. function-local named types) get | |
8638 | the current active scope. */ | |
71dfc51f | 8639 | |
a3f97cbb | 8640 | static dw_die_ref |
ab72d377 | 8641 | scope_die_for (t, context_die) |
556273e0 KH |
8642 | register tree t; |
8643 | register dw_die_ref context_die; | |
a3f97cbb JW |
8644 | { |
8645 | register dw_die_ref scope_die = NULL; | |
8646 | register tree containing_scope; | |
e3e7774e | 8647 | register int i; |
a3f97cbb | 8648 | |
777ad4c2 JM |
8649 | /* Non-types always go in the current scope. */ |
8650 | if (! TYPE_P (t)) | |
8651 | abort (); | |
8652 | ||
8653 | containing_scope = TYPE_CONTEXT (t); | |
ab72d377 | 8654 | |
2addbe1d JM |
8655 | /* Ignore namespaces for the moment. */ |
8656 | if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL) | |
8657 | containing_scope = NULL_TREE; | |
8658 | ||
5f2f160c JM |
8659 | /* Ignore function type "scopes" from the C frontend. They mean that |
8660 | a tagged type is local to a parmlist of a function declarator, but | |
8661 | that isn't useful to DWARF. */ | |
8662 | if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE) | |
8663 | containing_scope = NULL_TREE; | |
8664 | ||
71dfc51f RK |
8665 | if (containing_scope == NULL_TREE) |
8666 | scope_die = comp_unit_die; | |
777ad4c2 | 8667 | else if (TYPE_P (containing_scope)) |
348bb3c7 | 8668 | { |
777ad4c2 JM |
8669 | /* For types, we can just look up the appropriate DIE. But |
8670 | first we check to see if we're in the middle of emitting it | |
8671 | so we know where the new DIE should go. */ | |
348bb3c7 JM |
8672 | |
8673 | for (i = decl_scope_depth - 1; i >= 0; --i) | |
777ad4c2 | 8674 | if (decl_scope_table[i] == containing_scope) |
348bb3c7 JM |
8675 | break; |
8676 | ||
8677 | if (i < 0) | |
8678 | { | |
348bb3c7 JM |
8679 | if (debug_info_level > DINFO_LEVEL_TERSE |
8680 | && !TREE_ASM_WRITTEN (containing_scope)) | |
8681 | abort (); | |
8682 | ||
8683 | /* If none of the current dies are suitable, we get file scope. */ | |
8684 | scope_die = comp_unit_die; | |
8685 | } | |
8686 | else | |
777ad4c2 | 8687 | scope_die = lookup_type_die (containing_scope); |
348bb3c7 | 8688 | } |
a3f97cbb | 8689 | else |
777ad4c2 | 8690 | scope_die = context_die; |
71dfc51f | 8691 | |
a3f97cbb JW |
8692 | return scope_die; |
8693 | } | |
8694 | ||
777ad4c2 JM |
8695 | /* Returns nonzero iff CONTEXT_DIE is internal to a function. */ |
8696 | ||
c6991660 | 8697 | static inline int local_scope_p PARAMS ((dw_die_ref)); |
777ad4c2 JM |
8698 | static inline int |
8699 | local_scope_p (context_die) | |
8700 | dw_die_ref context_die; | |
a3f97cbb | 8701 | { |
777ad4c2 JM |
8702 | for (; context_die; context_die = context_die->die_parent) |
8703 | if (context_die->die_tag == DW_TAG_inlined_subroutine | |
8704 | || context_die->die_tag == DW_TAG_subprogram) | |
8705 | return 1; | |
8706 | return 0; | |
a3f97cbb JW |
8707 | } |
8708 | ||
9765e357 JM |
8709 | /* Returns nonzero iff CONTEXT_DIE is a class. */ |
8710 | ||
c6991660 | 8711 | static inline int class_scope_p PARAMS ((dw_die_ref)); |
9765e357 JM |
8712 | static inline int |
8713 | class_scope_p (context_die) | |
8714 | dw_die_ref context_die; | |
8715 | { | |
8716 | return (context_die | |
8717 | && (context_die->die_tag == DW_TAG_structure_type | |
8718 | || context_die->die_tag == DW_TAG_union_type)); | |
8719 | } | |
8720 | ||
a3f97cbb JW |
8721 | /* Many forms of DIEs require a "type description" attribute. This |
8722 | routine locates the proper "type descriptor" die for the type given | |
8723 | by 'type', and adds an DW_AT_type attribute below the given die. */ | |
71dfc51f | 8724 | |
a3f97cbb JW |
8725 | static void |
8726 | add_type_attribute (object_die, type, decl_const, decl_volatile, context_die) | |
8727 | register dw_die_ref object_die; | |
8728 | register tree type; | |
8729 | register int decl_const; | |
8730 | register int decl_volatile; | |
8731 | register dw_die_ref context_die; | |
8732 | { | |
8733 | register enum tree_code code = TREE_CODE (type); | |
a3f97cbb JW |
8734 | register dw_die_ref type_die = NULL; |
8735 | ||
ef76d03b JW |
8736 | /* ??? If this type is an unnamed subrange type of an integral or |
8737 | floating-point type, use the inner type. This is because we have no | |
8738 | support for unnamed types in base_type_die. This can happen if this is | |
8739 | an Ada subrange type. Correct solution is emit a subrange type die. */ | |
b1ccbc24 RK |
8740 | if ((code == INTEGER_TYPE || code == REAL_TYPE) |
8741 | && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0) | |
8742 | type = TREE_TYPE (type), code = TREE_CODE (type); | |
8743 | ||
a3f97cbb | 8744 | if (code == ERROR_MARK) |
b1ccbc24 | 8745 | return; |
a3f97cbb JW |
8746 | |
8747 | /* Handle a special case. For functions whose return type is void, we | |
8748 | generate *no* type attribute. (Note that no object may have type | |
8749 | `void', so this only applies to function return types). */ | |
8750 | if (code == VOID_TYPE) | |
b1ccbc24 | 8751 | return; |
a3f97cbb | 8752 | |
a3f97cbb JW |
8753 | type_die = modified_type_die (type, |
8754 | decl_const || TYPE_READONLY (type), | |
8755 | decl_volatile || TYPE_VOLATILE (type), | |
ab72d377 | 8756 | context_die); |
a3f97cbb | 8757 | if (type_die != NULL) |
71dfc51f | 8758 | add_AT_die_ref (object_die, DW_AT_type, type_die); |
a3f97cbb JW |
8759 | } |
8760 | ||
8761 | /* Given a tree pointer to a struct, class, union, or enum type node, return | |
8762 | a pointer to the (string) tag name for the given type, or zero if the type | |
8763 | was declared without a tag. */ | |
71dfc51f | 8764 | |
d3e3972c | 8765 | static const char * |
a3f97cbb JW |
8766 | type_tag (type) |
8767 | register tree type; | |
8768 | { | |
d3e3972c | 8769 | register const char *name = 0; |
a3f97cbb JW |
8770 | |
8771 | if (TYPE_NAME (type) != 0) | |
8772 | { | |
8773 | register tree t = 0; | |
8774 | ||
8775 | /* Find the IDENTIFIER_NODE for the type name. */ | |
8776 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
8777 | t = TYPE_NAME (type); | |
bdb669cb | 8778 | |
556273e0 | 8779 | /* The g++ front end makes the TYPE_NAME of *each* tagged type point to |
a3f97cbb | 8780 | a TYPE_DECL node, regardless of whether or not a `typedef' was |
bdb669cb | 8781 | involved. */ |
a94dbf2c JM |
8782 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
8783 | && ! DECL_IGNORED_P (TYPE_NAME (type))) | |
a3f97cbb | 8784 | t = DECL_NAME (TYPE_NAME (type)); |
bdb669cb | 8785 | |
a3f97cbb JW |
8786 | /* Now get the name as a string, or invent one. */ |
8787 | if (t != 0) | |
a94dbf2c | 8788 | name = IDENTIFIER_POINTER (t); |
a3f97cbb | 8789 | } |
71dfc51f | 8790 | |
a3f97cbb JW |
8791 | return (name == 0 || *name == '\0') ? 0 : name; |
8792 | } | |
8793 | ||
8794 | /* Return the type associated with a data member, make a special check | |
8795 | for bit field types. */ | |
71dfc51f RK |
8796 | |
8797 | static inline tree | |
a3f97cbb JW |
8798 | member_declared_type (member) |
8799 | register tree member; | |
8800 | { | |
71dfc51f RK |
8801 | return (DECL_BIT_FIELD_TYPE (member) |
8802 | ? DECL_BIT_FIELD_TYPE (member) | |
8803 | : TREE_TYPE (member)); | |
a3f97cbb JW |
8804 | } |
8805 | ||
d291dd49 | 8806 | /* Get the decl's label, as described by its RTL. This may be different |
a3f97cbb | 8807 | from the DECL_NAME name used in the source file. */ |
71dfc51f | 8808 | |
487a6e06 | 8809 | #if 0 |
d3e3972c | 8810 | static const char * |
d291dd49 | 8811 | decl_start_label (decl) |
a3f97cbb JW |
8812 | register tree decl; |
8813 | { | |
8814 | rtx x; | |
d3e3972c | 8815 | const char *fnname; |
a3f97cbb JW |
8816 | x = DECL_RTL (decl); |
8817 | if (GET_CODE (x) != MEM) | |
71dfc51f RK |
8818 | abort (); |
8819 | ||
a3f97cbb JW |
8820 | x = XEXP (x, 0); |
8821 | if (GET_CODE (x) != SYMBOL_REF) | |
71dfc51f RK |
8822 | abort (); |
8823 | ||
a3f97cbb JW |
8824 | fnname = XSTR (x, 0); |
8825 | return fnname; | |
8826 | } | |
487a6e06 | 8827 | #endif |
a3f97cbb | 8828 | \f |
956d6950 | 8829 | /* These routines generate the internal representation of the DIE's for |
a3f97cbb | 8830 | the compilation unit. Debugging information is collected by walking |
88dad228 | 8831 | the declaration trees passed in from dwarf2out_decl(). */ |
a3f97cbb JW |
8832 | |
8833 | static void | |
8834 | gen_array_type_die (type, context_die) | |
8835 | register tree type; | |
8836 | register dw_die_ref context_die; | |
8837 | { | |
ab72d377 | 8838 | register dw_die_ref scope_die = scope_die_for (type, context_die); |
a9d38797 | 8839 | register dw_die_ref array_die; |
a3f97cbb | 8840 | register tree element_type; |
bdb669cb | 8841 | |
a9d38797 JM |
8842 | /* ??? The SGI dwarf reader fails for array of array of enum types unless |
8843 | the inner array type comes before the outer array type. Thus we must | |
8844 | call gen_type_die before we call new_die. See below also. */ | |
8845 | #ifdef MIPS_DEBUGGING_INFO | |
8846 | gen_type_die (TREE_TYPE (type), context_die); | |
8847 | #endif | |
8848 | ||
8849 | array_die = new_die (DW_TAG_array_type, scope_die); | |
8850 | ||
a3f97cbb JW |
8851 | #if 0 |
8852 | /* We default the array ordering. SDB will probably do | |
8853 | the right things even if DW_AT_ordering is not present. It's not even | |
8854 | an issue until we start to get into multidimensional arrays anyway. If | |
8855 | SDB is ever caught doing the Wrong Thing for multi-dimensional arrays, | |
8856 | then we'll have to put the DW_AT_ordering attribute back in. (But if | |
8857 | and when we find out that we need to put these in, we will only do so | |
8858 | for multidimensional arrays. */ | |
8859 | add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major); | |
8860 | #endif | |
8861 | ||
a9d38797 | 8862 | #ifdef MIPS_DEBUGGING_INFO |
4edb7b60 JM |
8863 | /* The SGI compilers handle arrays of unknown bound by setting |
8864 | AT_declaration and not emitting any subrange DIEs. */ | |
a9d38797 JM |
8865 | if (! TYPE_DOMAIN (type)) |
8866 | add_AT_unsigned (array_die, DW_AT_declaration, 1); | |
8867 | else | |
8868 | #endif | |
8869 | add_subscript_info (array_die, type); | |
a3f97cbb | 8870 | |
14a774a9 | 8871 | add_name_attribute (array_die, type_tag (type)); |
a3f97cbb JW |
8872 | equate_type_number_to_die (type, array_die); |
8873 | ||
8874 | /* Add representation of the type of the elements of this array type. */ | |
8875 | element_type = TREE_TYPE (type); | |
71dfc51f | 8876 | |
a3f97cbb JW |
8877 | /* ??? The SGI dwarf reader fails for multidimensional arrays with a |
8878 | const enum type. E.g. const enum machine_mode insn_operand_mode[2][10]. | |
8879 | We work around this by disabling this feature. See also | |
8880 | add_subscript_info. */ | |
8881 | #ifndef MIPS_DEBUGGING_INFO | |
71dfc51f RK |
8882 | while (TREE_CODE (element_type) == ARRAY_TYPE) |
8883 | element_type = TREE_TYPE (element_type); | |
8884 | ||
a3f97cbb | 8885 | gen_type_die (element_type, context_die); |
a9d38797 | 8886 | #endif |
a3f97cbb JW |
8887 | |
8888 | add_type_attribute (array_die, element_type, 0, 0, context_die); | |
8889 | } | |
8890 | ||
8891 | static void | |
8892 | gen_set_type_die (type, context_die) | |
8893 | register tree type; | |
8894 | register dw_die_ref context_die; | |
8895 | { | |
71dfc51f RK |
8896 | register dw_die_ref type_die |
8897 | = new_die (DW_TAG_set_type, scope_die_for (type, context_die)); | |
8898 | ||
a3f97cbb | 8899 | equate_type_number_to_die (type, type_die); |
a3f97cbb JW |
8900 | add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die); |
8901 | } | |
8902 | ||
d6f4ec51 | 8903 | #if 0 |
a3f97cbb JW |
8904 | static void |
8905 | gen_entry_point_die (decl, context_die) | |
8906 | register tree decl; | |
8907 | register dw_die_ref context_die; | |
8908 | { | |
8909 | register tree origin = decl_ultimate_origin (decl); | |
8910 | register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die); | |
8911 | if (origin != NULL) | |
71dfc51f | 8912 | add_abstract_origin_attribute (decl_die, origin); |
a3f97cbb JW |
8913 | else |
8914 | { | |
8915 | add_name_and_src_coords_attributes (decl_die, decl); | |
a3f97cbb JW |
8916 | add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)), |
8917 | 0, 0, context_die); | |
8918 | } | |
71dfc51f | 8919 | |
a3f97cbb | 8920 | if (DECL_ABSTRACT (decl)) |
71dfc51f | 8921 | equate_decl_number_to_die (decl, decl_die); |
a3f97cbb | 8922 | else |
71dfc51f | 8923 | add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl)); |
a3f97cbb | 8924 | } |
d6f4ec51 | 8925 | #endif |
a3f97cbb | 8926 | |
8a8c3656 JM |
8927 | /* Remember a type in the incomplete_types_list. */ |
8928 | ||
8929 | static void | |
8930 | add_incomplete_type (type) | |
8931 | tree type; | |
8932 | { | |
8933 | if (incomplete_types == incomplete_types_allocated) | |
8934 | { | |
8935 | incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT; | |
8936 | incomplete_types_list | |
8937 | = (tree *) xrealloc (incomplete_types_list, | |
8938 | sizeof (tree) * incomplete_types_allocated); | |
8939 | } | |
8940 | ||
8941 | incomplete_types_list[incomplete_types++] = type; | |
8942 | } | |
8943 | ||
8944 | /* Walk through the list of incomplete types again, trying once more to | |
8945 | emit full debugging info for them. */ | |
8946 | ||
8947 | static void | |
8948 | retry_incomplete_types () | |
8949 | { | |
8950 | register tree type; | |
8951 | ||
8952 | while (incomplete_types) | |
8953 | { | |
8954 | --incomplete_types; | |
8955 | type = incomplete_types_list[incomplete_types]; | |
8956 | gen_type_die (type, comp_unit_die); | |
8957 | } | |
8958 | } | |
8959 | ||
a3f97cbb | 8960 | /* Generate a DIE to represent an inlined instance of an enumeration type. */ |
71dfc51f | 8961 | |
a3f97cbb JW |
8962 | static void |
8963 | gen_inlined_enumeration_type_die (type, context_die) | |
8964 | register tree type; | |
8965 | register dw_die_ref context_die; | |
8966 | { | |
71dfc51f | 8967 | register dw_die_ref type_die = new_die (DW_TAG_enumeration_type, |
777ad4c2 | 8968 | context_die); |
bbc6ae08 NC |
8969 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
8970 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
8971 | add_abstract_origin_attribute (type_die, type); |
8972 | } | |
8973 | ||
8974 | /* Generate a DIE to represent an inlined instance of a structure type. */ | |
71dfc51f | 8975 | |
a3f97cbb JW |
8976 | static void |
8977 | gen_inlined_structure_type_die (type, context_die) | |
8978 | register tree type; | |
8979 | register dw_die_ref context_die; | |
8980 | { | |
777ad4c2 JM |
8981 | register dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die); |
8982 | ||
bbc6ae08 NC |
8983 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
8984 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
8985 | add_abstract_origin_attribute (type_die, type); |
8986 | } | |
8987 | ||
8988 | /* Generate a DIE to represent an inlined instance of a union type. */ | |
71dfc51f | 8989 | |
a3f97cbb JW |
8990 | static void |
8991 | gen_inlined_union_type_die (type, context_die) | |
8992 | register tree type; | |
8993 | register dw_die_ref context_die; | |
8994 | { | |
777ad4c2 JM |
8995 | register dw_die_ref type_die = new_die (DW_TAG_union_type, context_die); |
8996 | ||
bbc6ae08 NC |
8997 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
8998 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
8999 | add_abstract_origin_attribute (type_die, type); |
9000 | } | |
9001 | ||
9002 | /* Generate a DIE to represent an enumeration type. Note that these DIEs | |
9003 | include all of the information about the enumeration values also. Each | |
273dbe67 JM |
9004 | enumerated type name/value is listed as a child of the enumerated type |
9005 | DIE. */ | |
71dfc51f | 9006 | |
a3f97cbb | 9007 | static void |
273dbe67 | 9008 | gen_enumeration_type_die (type, context_die) |
a3f97cbb | 9009 | register tree type; |
a3f97cbb JW |
9010 | register dw_die_ref context_die; |
9011 | { | |
273dbe67 JM |
9012 | register dw_die_ref type_die = lookup_type_die (type); |
9013 | ||
a3f97cbb JW |
9014 | if (type_die == NULL) |
9015 | { | |
9016 | type_die = new_die (DW_TAG_enumeration_type, | |
ab72d377 | 9017 | scope_die_for (type, context_die)); |
a3f97cbb JW |
9018 | equate_type_number_to_die (type, type_die); |
9019 | add_name_attribute (type_die, type_tag (type)); | |
a3f97cbb | 9020 | } |
273dbe67 JM |
9021 | else if (! TYPE_SIZE (type)) |
9022 | return; | |
9023 | else | |
9024 | remove_AT (type_die, DW_AT_declaration); | |
9025 | ||
9026 | /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the | |
9027 | given enum type is incomplete, do not generate the DW_AT_byte_size | |
9028 | attribute or the DW_AT_element_list attribute. */ | |
9029 | if (TYPE_SIZE (type)) | |
a3f97cbb | 9030 | { |
273dbe67 | 9031 | register tree link; |
71dfc51f | 9032 | |
a082c85a | 9033 | TREE_ASM_WRITTEN (type) = 1; |
273dbe67 | 9034 | add_byte_size_attribute (type_die, type); |
e9a25f70 | 9035 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
b2932ae5 | 9036 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
71dfc51f | 9037 | |
ef76d03b JW |
9038 | /* If the first reference to this type was as the return type of an |
9039 | inline function, then it may not have a parent. Fix this now. */ | |
9040 | if (type_die->die_parent == NULL) | |
9041 | add_child_die (scope_die_for (type, context_die), type_die); | |
9042 | ||
273dbe67 JM |
9043 | for (link = TYPE_FIELDS (type); |
9044 | link != NULL; link = TREE_CHAIN (link)) | |
a3f97cbb | 9045 | { |
273dbe67 | 9046 | register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die); |
71dfc51f | 9047 | |
273dbe67 JM |
9048 | add_name_attribute (enum_die, |
9049 | IDENTIFIER_POINTER (TREE_PURPOSE (link))); | |
665f2503 RK |
9050 | |
9051 | if (host_integerp (TREE_VALUE (link), 0)) | |
fc9e8a14 JJ |
9052 | { |
9053 | if (tree_int_cst_sgn (TREE_VALUE (link)) < 0) | |
9054 | add_AT_int (enum_die, DW_AT_const_value, | |
9055 | tree_low_cst (TREE_VALUE (link), 0)); | |
9056 | else | |
9057 | add_AT_unsigned (enum_die, DW_AT_const_value, | |
9058 | tree_low_cst (TREE_VALUE (link), 0)); | |
9059 | } | |
a3f97cbb JW |
9060 | } |
9061 | } | |
273dbe67 JM |
9062 | else |
9063 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
a3f97cbb JW |
9064 | } |
9065 | ||
a3f97cbb JW |
9066 | /* Generate a DIE to represent either a real live formal parameter decl or to |
9067 | represent just the type of some formal parameter position in some function | |
9068 | type. | |
71dfc51f | 9069 | |
a3f97cbb JW |
9070 | Note that this routine is a bit unusual because its argument may be a |
9071 | ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which | |
9072 | represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE | |
9073 | node. If it's the former then this function is being called to output a | |
9074 | DIE to represent a formal parameter object (or some inlining thereof). If | |
9075 | it's the latter, then this function is only being called to output a | |
9076 | DW_TAG_formal_parameter DIE to stand as a placeholder for some formal | |
9077 | argument type of some subprogram type. */ | |
71dfc51f | 9078 | |
a94dbf2c | 9079 | static dw_die_ref |
a3f97cbb JW |
9080 | gen_formal_parameter_die (node, context_die) |
9081 | register tree node; | |
9082 | register dw_die_ref context_die; | |
9083 | { | |
71dfc51f RK |
9084 | register dw_die_ref parm_die |
9085 | = new_die (DW_TAG_formal_parameter, context_die); | |
a3f97cbb | 9086 | register tree origin; |
71dfc51f | 9087 | |
a3f97cbb JW |
9088 | switch (TREE_CODE_CLASS (TREE_CODE (node))) |
9089 | { | |
a3f97cbb JW |
9090 | case 'd': |
9091 | origin = decl_ultimate_origin (node); | |
9092 | if (origin != NULL) | |
a94dbf2c | 9093 | add_abstract_origin_attribute (parm_die, origin); |
a3f97cbb JW |
9094 | else |
9095 | { | |
9096 | add_name_and_src_coords_attributes (parm_die, node); | |
9097 | add_type_attribute (parm_die, TREE_TYPE (node), | |
9098 | TREE_READONLY (node), | |
9099 | TREE_THIS_VOLATILE (node), | |
9100 | context_die); | |
bdb669cb JM |
9101 | if (DECL_ARTIFICIAL (node)) |
9102 | add_AT_flag (parm_die, DW_AT_artificial, 1); | |
a3f97cbb | 9103 | } |
71dfc51f | 9104 | |
141719a8 JM |
9105 | equate_decl_number_to_die (node, parm_die); |
9106 | if (! DECL_ABSTRACT (node)) | |
a94dbf2c | 9107 | add_location_or_const_value_attribute (parm_die, node); |
71dfc51f | 9108 | |
a3f97cbb JW |
9109 | break; |
9110 | ||
a3f97cbb | 9111 | case 't': |
71dfc51f | 9112 | /* We were called with some kind of a ..._TYPE node. */ |
a3f97cbb JW |
9113 | add_type_attribute (parm_die, node, 0, 0, context_die); |
9114 | break; | |
9115 | ||
a3f97cbb JW |
9116 | default: |
9117 | abort (); | |
9118 | } | |
71dfc51f | 9119 | |
a94dbf2c | 9120 | return parm_die; |
a3f97cbb JW |
9121 | } |
9122 | ||
9123 | /* Generate a special type of DIE used as a stand-in for a trailing ellipsis | |
9124 | at the end of an (ANSI prototyped) formal parameters list. */ | |
71dfc51f | 9125 | |
a3f97cbb JW |
9126 | static void |
9127 | gen_unspecified_parameters_die (decl_or_type, context_die) | |
2618f955 | 9128 | register tree decl_or_type ATTRIBUTE_UNUSED; |
a3f97cbb JW |
9129 | register dw_die_ref context_die; |
9130 | { | |
487a6e06 | 9131 | new_die (DW_TAG_unspecified_parameters, context_die); |
a3f97cbb JW |
9132 | } |
9133 | ||
9134 | /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a | |
9135 | DW_TAG_unspecified_parameters DIE) to represent the types of the formal | |
9136 | parameters as specified in some function type specification (except for | |
1cfdcc15 | 9137 | those which appear as part of a function *definition*). */ |
71dfc51f | 9138 | |
a3f97cbb JW |
9139 | static void |
9140 | gen_formal_types_die (function_or_method_type, context_die) | |
9141 | register tree function_or_method_type; | |
9142 | register dw_die_ref context_die; | |
9143 | { | |
9144 | register tree link; | |
9145 | register tree formal_type = NULL; | |
5daf7c0a JM |
9146 | register tree first_parm_type; |
9147 | tree arg; | |
a3f97cbb | 9148 | |
5daf7c0a JM |
9149 | if (TREE_CODE (function_or_method_type) == FUNCTION_DECL) |
9150 | { | |
9151 | arg = DECL_ARGUMENTS (function_or_method_type); | |
9152 | function_or_method_type = TREE_TYPE (function_or_method_type); | |
9153 | } | |
9154 | else | |
9155 | arg = NULL_TREE; | |
9156 | ||
9157 | first_parm_type = TYPE_ARG_TYPES (function_or_method_type); | |
a3f97cbb | 9158 | |
556273e0 | 9159 | /* Make our first pass over the list of formal parameter types and output a |
a3f97cbb | 9160 | DW_TAG_formal_parameter DIE for each one. */ |
5daf7c0a | 9161 | for (link = first_parm_type; link; ) |
a3f97cbb | 9162 | { |
a94dbf2c | 9163 | register dw_die_ref parm_die; |
556273e0 | 9164 | |
a3f97cbb JW |
9165 | formal_type = TREE_VALUE (link); |
9166 | if (formal_type == void_type_node) | |
9167 | break; | |
9168 | ||
9169 | /* Output a (nameless) DIE to represent the formal parameter itself. */ | |
a94dbf2c | 9170 | parm_die = gen_formal_parameter_die (formal_type, context_die); |
5daf7c0a JM |
9171 | if ((TREE_CODE (function_or_method_type) == METHOD_TYPE |
9172 | && link == first_parm_type) | |
9173 | || (arg && DECL_ARTIFICIAL (arg))) | |
a94dbf2c | 9174 | add_AT_flag (parm_die, DW_AT_artificial, 1); |
5daf7c0a JM |
9175 | |
9176 | link = TREE_CHAIN (link); | |
9177 | if (arg) | |
9178 | arg = TREE_CHAIN (arg); | |
a3f97cbb JW |
9179 | } |
9180 | ||
9181 | /* If this function type has an ellipsis, add a | |
9182 | DW_TAG_unspecified_parameters DIE to the end of the parameter list. */ | |
9183 | if (formal_type != void_type_node) | |
9184 | gen_unspecified_parameters_die (function_or_method_type, context_die); | |
9185 | ||
556273e0 | 9186 | /* Make our second (and final) pass over the list of formal parameter types |
a3f97cbb JW |
9187 | and output DIEs to represent those types (as necessary). */ |
9188 | for (link = TYPE_ARG_TYPES (function_or_method_type); | |
9189 | link; | |
9190 | link = TREE_CHAIN (link)) | |
9191 | { | |
9192 | formal_type = TREE_VALUE (link); | |
9193 | if (formal_type == void_type_node) | |
9194 | break; | |
9195 | ||
b50c02f9 | 9196 | gen_type_die (formal_type, context_die); |
a3f97cbb JW |
9197 | } |
9198 | } | |
9199 | ||
10a11b75 JM |
9200 | /* We want to generate the DIE for TYPE so that we can generate the |
9201 | die for MEMBER, which has been defined; we will need to refer back | |
9202 | to the member declaration nested within TYPE. If we're trying to | |
9203 | generate minimal debug info for TYPE, processing TYPE won't do the | |
9204 | trick; we need to attach the member declaration by hand. */ | |
9205 | ||
9206 | static void | |
9207 | gen_type_die_for_member (type, member, context_die) | |
9208 | tree type, member; | |
9209 | dw_die_ref context_die; | |
9210 | { | |
9211 | gen_type_die (type, context_die); | |
9212 | ||
9213 | /* If we're trying to avoid duplicate debug info, we may not have | |
9214 | emitted the member decl for this function. Emit it now. */ | |
9215 | if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) | |
9216 | && ! lookup_decl_die (member)) | |
9217 | { | |
9218 | if (decl_ultimate_origin (member)) | |
9219 | abort (); | |
9220 | ||
9221 | push_decl_scope (type); | |
9222 | if (TREE_CODE (member) == FUNCTION_DECL) | |
9223 | gen_subprogram_die (member, lookup_type_die (type)); | |
9224 | else | |
9225 | gen_variable_die (member, lookup_type_die (type)); | |
9226 | pop_decl_scope (); | |
9227 | } | |
9228 | } | |
9229 | ||
9230 | /* Generate the DWARF2 info for the "abstract" instance | |
9231 | of a function which we may later generate inlined and/or | |
9232 | out-of-line instances of. */ | |
9233 | ||
1edf43d6 JM |
9234 | void |
9235 | dwarf2out_abstract_function (decl) | |
10a11b75 JM |
9236 | tree decl; |
9237 | { | |
5daf7c0a | 9238 | register dw_die_ref old_die; |
777ad4c2 | 9239 | tree save_fn; |
5daf7c0a JM |
9240 | tree context; |
9241 | int was_abstract = DECL_ABSTRACT (decl); | |
9242 | ||
9243 | /* Make sure we have the actual abstract inline, not a clone. */ | |
9244 | decl = DECL_ORIGIN (decl); | |
10a11b75 | 9245 | |
5daf7c0a | 9246 | old_die = lookup_decl_die (decl); |
10a11b75 JM |
9247 | if (old_die && get_AT_unsigned (old_die, DW_AT_inline)) |
9248 | /* We've already generated the abstract instance. */ | |
9249 | return; | |
9250 | ||
5daf7c0a JM |
9251 | /* Be sure we've emitted the in-class declaration DIE (if any) first, so |
9252 | we don't get confused by DECL_ABSTRACT. */ | |
9253 | context = decl_class_context (decl); | |
9254 | if (context) | |
9255 | gen_type_die_for_member | |
9256 | (context, decl, decl_function_context (decl) ? NULL : comp_unit_die); | |
9257 | ||
9258 | /* Pretend we've just finished compiling this function. */ | |
777ad4c2 JM |
9259 | save_fn = current_function_decl; |
9260 | current_function_decl = decl; | |
9261 | ||
10a11b75 JM |
9262 | set_decl_abstract_flags (decl, 1); |
9263 | dwarf2out_decl (decl); | |
5daf7c0a JM |
9264 | if (! was_abstract) |
9265 | set_decl_abstract_flags (decl, 0); | |
777ad4c2 JM |
9266 | |
9267 | current_function_decl = save_fn; | |
10a11b75 JM |
9268 | } |
9269 | ||
a3f97cbb JW |
9270 | /* Generate a DIE to represent a declared function (either file-scope or |
9271 | block-local). */ | |
71dfc51f | 9272 | |
a3f97cbb JW |
9273 | static void |
9274 | gen_subprogram_die (decl, context_die) | |
9275 | register tree decl; | |
9276 | register dw_die_ref context_die; | |
9277 | { | |
9278 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
9279 | register tree origin = decl_ultimate_origin (decl); | |
4b674448 | 9280 | register dw_die_ref subr_die; |
b1ccbc24 | 9281 | register rtx fp_reg; |
a3f97cbb JW |
9282 | register tree fn_arg_types; |
9283 | register tree outer_scope; | |
a94dbf2c | 9284 | register dw_die_ref old_die = lookup_decl_die (decl); |
9765e357 JM |
9285 | register int declaration = (current_function_decl != decl |
9286 | || class_scope_p (context_die)); | |
a3f97cbb | 9287 | |
10a11b75 JM |
9288 | /* Note that it is possible to have both DECL_ABSTRACT and `declaration' |
9289 | be true, if we started to generate the abstract instance of an inline, | |
9290 | decided to output its containing class, and proceeded to emit the | |
9291 | declaration of the inline from the member list for the class. In that | |
9292 | case, `declaration' takes priority; we'll get back to the abstract | |
9293 | instance when we're done with the class. */ | |
9294 | ||
1cfdcc15 JM |
9295 | /* The class-scope declaration DIE must be the primary DIE. */ |
9296 | if (origin && declaration && class_scope_p (context_die)) | |
9297 | { | |
9298 | origin = NULL; | |
9299 | if (old_die) | |
9300 | abort (); | |
9301 | } | |
9302 | ||
a3f97cbb JW |
9303 | if (origin != NULL) |
9304 | { | |
777ad4c2 | 9305 | if (declaration && ! local_scope_p (context_die)) |
10a11b75 JM |
9306 | abort (); |
9307 | ||
8d8238b6 JM |
9308 | /* Fixup die_parent for the abstract instance of a nested |
9309 | inline function. */ | |
9310 | if (old_die && old_die->die_parent == NULL) | |
9311 | add_child_die (context_die, old_die); | |
9312 | ||
4b674448 | 9313 | subr_die = new_die (DW_TAG_subprogram, context_die); |
a3f97cbb JW |
9314 | add_abstract_origin_attribute (subr_die, origin); |
9315 | } | |
bdb669cb JM |
9316 | else if (old_die) |
9317 | { | |
4b674448 | 9318 | register unsigned file_index |
2e18bbae | 9319 | = lookup_filename (&decl_file_table, DECL_SOURCE_FILE (decl)); |
a94dbf2c | 9320 | |
1edf43d6 JM |
9321 | if (!get_AT_flag (old_die, DW_AT_declaration) |
9322 | /* We can have a normal definition following an inline one in the | |
9323 | case of redefinition of GNU C extern inlines. | |
9324 | It seems reasonable to use AT_specification in this case. */ | |
9325 | && !get_AT_unsigned (old_die, DW_AT_inline)) | |
b75ab88b NC |
9326 | { |
9327 | /* ??? This can happen if there is a bug in the program, for | |
9328 | instance, if it has duplicate function definitions. Ideally, | |
9329 | we should detect this case and ignore it. For now, if we have | |
9330 | already reported an error, any error at all, then assume that | |
9331 | we got here because of a input error, not a dwarf2 bug. */ | |
b75ab88b NC |
9332 | if (errorcount) |
9333 | return; | |
9334 | abort (); | |
9335 | } | |
4b674448 JM |
9336 | |
9337 | /* If the definition comes from the same place as the declaration, | |
a94dbf2c JM |
9338 | maybe use the old DIE. We always want the DIE for this function |
9339 | that has the *_pc attributes to be under comp_unit_die so the | |
cb9e9d8d JM |
9340 | debugger can find it. We also need to do this for abstract |
9341 | instances of inlines, since the spec requires the out-of-line copy | |
9342 | to have the same parent. For local class methods, this doesn't | |
9343 | apply; we just use the old DIE. */ | |
9344 | if ((old_die->die_parent == comp_unit_die || context_die == NULL) | |
a96c67ec JM |
9345 | && (DECL_ARTIFICIAL (decl) |
9346 | || (get_AT_unsigned (old_die, DW_AT_decl_file) == file_index | |
9347 | && (get_AT_unsigned (old_die, DW_AT_decl_line) | |
556273e0 | 9348 | == (unsigned) DECL_SOURCE_LINE (decl))))) |
bdb669cb | 9349 | { |
4b674448 JM |
9350 | subr_die = old_die; |
9351 | ||
9352 | /* Clear out the declaration attribute and the parm types. */ | |
9353 | remove_AT (subr_die, DW_AT_declaration); | |
9354 | remove_children (subr_die); | |
9355 | } | |
9356 | else | |
9357 | { | |
9358 | subr_die = new_die (DW_TAG_subprogram, context_die); | |
9359 | add_AT_die_ref (subr_die, DW_AT_specification, old_die); | |
bdb669cb JM |
9360 | if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index) |
9361 | add_AT_unsigned (subr_die, DW_AT_decl_file, file_index); | |
9362 | if (get_AT_unsigned (old_die, DW_AT_decl_line) | |
556273e0 | 9363 | != (unsigned) DECL_SOURCE_LINE (decl)) |
bdb669cb JM |
9364 | add_AT_unsigned |
9365 | (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl)); | |
9366 | } | |
9367 | } | |
a3f97cbb JW |
9368 | else |
9369 | { | |
777ad4c2 | 9370 | subr_die = new_die (DW_TAG_subprogram, context_die); |
556273e0 | 9371 | |
273dbe67 JM |
9372 | if (TREE_PUBLIC (decl)) |
9373 | add_AT_flag (subr_die, DW_AT_external, 1); | |
71dfc51f | 9374 | |
a3f97cbb | 9375 | add_name_and_src_coords_attributes (subr_die, decl); |
4927276d JM |
9376 | if (debug_info_level > DINFO_LEVEL_TERSE) |
9377 | { | |
9378 | register tree type = TREE_TYPE (decl); | |
71dfc51f | 9379 | |
4927276d JM |
9380 | add_prototyped_attribute (subr_die, type); |
9381 | add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die); | |
9382 | } | |
71dfc51f | 9383 | |
a3f97cbb | 9384 | add_pure_or_virtual_attribute (subr_die, decl); |
273dbe67 JM |
9385 | if (DECL_ARTIFICIAL (decl)) |
9386 | add_AT_flag (subr_die, DW_AT_artificial, 1); | |
a94dbf2c JM |
9387 | if (TREE_PROTECTED (decl)) |
9388 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected); | |
9389 | else if (TREE_PRIVATE (decl)) | |
9390 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb | 9391 | } |
4edb7b60 | 9392 | |
a94dbf2c JM |
9393 | if (declaration) |
9394 | { | |
1edf43d6 JM |
9395 | if (!(old_die && get_AT_unsigned (old_die, DW_AT_inline))) |
9396 | { | |
9397 | add_AT_flag (subr_die, DW_AT_declaration, 1); | |
9398 | ||
9399 | /* The first time we see a member function, it is in the context of | |
9400 | the class to which it belongs. We make sure of this by emitting | |
9401 | the class first. The next time is the definition, which is | |
9402 | handled above. The two may come from the same source text. */ | |
9403 | if (DECL_CONTEXT (decl) || DECL_ABSTRACT (decl)) | |
9404 | equate_decl_number_to_die (decl, subr_die); | |
9405 | } | |
a94dbf2c JM |
9406 | } |
9407 | else if (DECL_ABSTRACT (decl)) | |
a3f97cbb | 9408 | { |
10a11b75 | 9409 | if (DECL_INLINE (decl) && !flag_no_inline) |
61b32c02 | 9410 | { |
10a11b75 JM |
9411 | /* ??? Checking DECL_DEFER_OUTPUT is correct for static |
9412 | inline functions, but not for extern inline functions. | |
9413 | We can't get this completely correct because information | |
9414 | about whether the function was declared inline is not | |
9415 | saved anywhere. */ | |
9416 | if (DECL_DEFER_OUTPUT (decl)) | |
61b32c02 JM |
9417 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined); |
9418 | else | |
10a11b75 | 9419 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined); |
61b32c02 | 9420 | } |
61b32c02 | 9421 | else |
10a11b75 | 9422 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined); |
61b32c02 | 9423 | |
a3f97cbb JW |
9424 | equate_decl_number_to_die (decl, subr_die); |
9425 | } | |
9426 | else if (!DECL_EXTERNAL (decl)) | |
9427 | { | |
1edf43d6 | 9428 | if (!(old_die && get_AT_unsigned (old_die, DW_AT_inline))) |
ba7b35df | 9429 | equate_decl_number_to_die (decl, subr_die); |
71dfc51f | 9430 | |
5c90448c JM |
9431 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL, |
9432 | current_funcdef_number); | |
7d4440be | 9433 | add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id); |
5c90448c JM |
9434 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, |
9435 | current_funcdef_number); | |
a3f97cbb JW |
9436 | add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id); |
9437 | ||
d291dd49 JM |
9438 | add_pubname (decl, subr_die); |
9439 | add_arange (decl, subr_die); | |
9440 | ||
a3f97cbb | 9441 | #ifdef MIPS_DEBUGGING_INFO |
a3f97cbb JW |
9442 | /* Add a reference to the FDE for this routine. */ |
9443 | add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde); | |
9444 | #endif | |
9445 | ||
810429b7 JM |
9446 | /* Define the "frame base" location for this routine. We use the |
9447 | frame pointer or stack pointer registers, since the RTL for local | |
9448 | variables is relative to one of them. */ | |
b1ccbc24 RK |
9449 | fp_reg |
9450 | = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx; | |
9451 | add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg)); | |
a3f97cbb | 9452 | |
ef76d03b JW |
9453 | #if 0 |
9454 | /* ??? This fails for nested inline functions, because context_display | |
9455 | is not part of the state saved/restored for inline functions. */ | |
88dad228 | 9456 | if (current_function_needs_context) |
ef76d03b JW |
9457 | add_AT_location_description (subr_die, DW_AT_static_link, |
9458 | lookup_static_chain (decl)); | |
9459 | #endif | |
a3f97cbb JW |
9460 | } |
9461 | ||
9462 | /* Now output descriptions of the arguments for this function. This gets | |
556273e0 | 9463 | (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list |
a3f97cbb JW |
9464 | for a FUNCTION_DECL doesn't indicate cases where there was a trailing |
9465 | `...' at the end of the formal parameter list. In order to find out if | |
9466 | there was a trailing ellipsis or not, we must instead look at the type | |
9467 | associated with the FUNCTION_DECL. This will be a node of type | |
9468 | FUNCTION_TYPE. If the chain of type nodes hanging off of this | |
556273e0 | 9469 | FUNCTION_TYPE node ends with a void_type_node then there should *not* be |
a3f97cbb | 9470 | an ellipsis at the end. */ |
71dfc51f | 9471 | |
a3f97cbb | 9472 | /* In the case where we are describing a mere function declaration, all we |
556273e0 | 9473 | need to do here (and all we *can* do here) is to describe the *types* of |
a3f97cbb | 9474 | its formal parameters. */ |
4927276d | 9475 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 9476 | ; |
4edb7b60 | 9477 | else if (declaration) |
5daf7c0a | 9478 | gen_formal_types_die (decl, subr_die); |
a3f97cbb JW |
9479 | else |
9480 | { | |
9481 | /* Generate DIEs to represent all known formal parameters */ | |
9482 | register tree arg_decls = DECL_ARGUMENTS (decl); | |
9483 | register tree parm; | |
9484 | ||
9485 | /* When generating DIEs, generate the unspecified_parameters DIE | |
9486 | instead if we come across the arg "__builtin_va_alist" */ | |
9487 | for (parm = arg_decls; parm; parm = TREE_CHAIN (parm)) | |
71dfc51f RK |
9488 | if (TREE_CODE (parm) == PARM_DECL) |
9489 | { | |
db3cf6fb MS |
9490 | if (DECL_NAME (parm) |
9491 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)), | |
9492 | "__builtin_va_alist")) | |
71dfc51f RK |
9493 | gen_unspecified_parameters_die (parm, subr_die); |
9494 | else | |
9495 | gen_decl_die (parm, subr_die); | |
9496 | } | |
a3f97cbb JW |
9497 | |
9498 | /* Decide whether we need a unspecified_parameters DIE at the end. | |
556273e0 | 9499 | There are 2 more cases to do this for: 1) the ansi ... declaration - |
a3f97cbb JW |
9500 | this is detectable when the end of the arg list is not a |
9501 | void_type_node 2) an unprototyped function declaration (not a | |
9502 | definition). This just means that we have no info about the | |
9503 | parameters at all. */ | |
9504 | fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
71dfc51f | 9505 | if (fn_arg_types != NULL) |
a3f97cbb JW |
9506 | { |
9507 | /* this is the prototyped case, check for ... */ | |
9508 | if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node) | |
71dfc51f | 9509 | gen_unspecified_parameters_die (decl, subr_die); |
a3f97cbb | 9510 | } |
71dfc51f RK |
9511 | else if (DECL_INITIAL (decl) == NULL_TREE) |
9512 | gen_unspecified_parameters_die (decl, subr_die); | |
a3f97cbb JW |
9513 | } |
9514 | ||
9515 | /* Output Dwarf info for all of the stuff within the body of the function | |
9516 | (if it has one - it may be just a declaration). */ | |
9517 | outer_scope = DECL_INITIAL (decl); | |
9518 | ||
d7248bff JM |
9519 | /* Note that here, `outer_scope' is a pointer to the outermost BLOCK |
9520 | node created to represent a function. This outermost BLOCK actually | |
9521 | represents the outermost binding contour for the function, i.e. the | |
9522 | contour in which the function's formal parameters and labels get | |
9523 | declared. Curiously, it appears that the front end doesn't actually | |
9524 | put the PARM_DECL nodes for the current function onto the BLOCK_VARS | |
9525 | list for this outer scope. (They are strung off of the DECL_ARGUMENTS | |
9526 | list for the function instead.) The BLOCK_VARS list for the | |
9527 | `outer_scope' does provide us with a list of the LABEL_DECL nodes for | |
9528 | the function however, and we output DWARF info for those in | |
9529 | decls_for_scope. Just within the `outer_scope' there will be a BLOCK | |
9530 | node representing the function's outermost pair of curly braces, and | |
9531 | any blocks used for the base and member initializers of a C++ | |
9532 | constructor function. */ | |
4edb7b60 | 9533 | if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK) |
7e23cb16 JM |
9534 | { |
9535 | current_function_has_inlines = 0; | |
9536 | decls_for_scope (outer_scope, subr_die, 0); | |
71dfc51f | 9537 | |
ce61cc73 | 9538 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
7e23cb16 JM |
9539 | if (current_function_has_inlines) |
9540 | { | |
9541 | add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1); | |
9542 | if (! comp_unit_has_inlines) | |
9543 | { | |
9544 | add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1); | |
9545 | comp_unit_has_inlines = 1; | |
9546 | } | |
9547 | } | |
9548 | #endif | |
9549 | } | |
a3f97cbb JW |
9550 | } |
9551 | ||
9552 | /* Generate a DIE to represent a declared data object. */ | |
71dfc51f | 9553 | |
a3f97cbb JW |
9554 | static void |
9555 | gen_variable_die (decl, context_die) | |
9556 | register tree decl; | |
9557 | register dw_die_ref context_die; | |
9558 | { | |
9559 | register tree origin = decl_ultimate_origin (decl); | |
9560 | register dw_die_ref var_die = new_die (DW_TAG_variable, context_die); | |
71dfc51f | 9561 | |
bdb669cb | 9562 | dw_die_ref old_die = lookup_decl_die (decl); |
9765e357 JM |
9563 | int declaration = (DECL_EXTERNAL (decl) |
9564 | || class_scope_p (context_die)); | |
4edb7b60 | 9565 | |
a3f97cbb | 9566 | if (origin != NULL) |
71dfc51f | 9567 | add_abstract_origin_attribute (var_die, origin); |
f76b8156 JW |
9568 | /* Loop unrolling can create multiple blocks that refer to the same |
9569 | static variable, so we must test for the DW_AT_declaration flag. */ | |
9570 | /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to | |
9571 | copy decls and set the DECL_ABSTRACT flag on them instead of | |
9572 | sharing them. */ | |
9573 | else if (old_die && TREE_STATIC (decl) | |
9574 | && get_AT_flag (old_die, DW_AT_declaration) == 1) | |
bdb669cb | 9575 | { |
e689ae67 | 9576 | /* This is a definition of a C++ class level static. */ |
bdb669cb JM |
9577 | add_AT_die_ref (var_die, DW_AT_specification, old_die); |
9578 | if (DECL_NAME (decl)) | |
9579 | { | |
9580 | register unsigned file_index | |
2e18bbae | 9581 | = lookup_filename (&decl_file_table, DECL_SOURCE_FILE (decl)); |
71dfc51f | 9582 | |
bdb669cb JM |
9583 | if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index) |
9584 | add_AT_unsigned (var_die, DW_AT_decl_file, file_index); | |
71dfc51f | 9585 | |
bdb669cb | 9586 | if (get_AT_unsigned (old_die, DW_AT_decl_line) |
556273e0 | 9587 | != (unsigned) DECL_SOURCE_LINE (decl)) |
71dfc51f RK |
9588 | |
9589 | add_AT_unsigned (var_die, DW_AT_decl_line, | |
9590 | DECL_SOURCE_LINE (decl)); | |
bdb669cb JM |
9591 | } |
9592 | } | |
a3f97cbb JW |
9593 | else |
9594 | { | |
9595 | add_name_and_src_coords_attributes (var_die, decl); | |
a3f97cbb JW |
9596 | add_type_attribute (var_die, TREE_TYPE (decl), |
9597 | TREE_READONLY (decl), | |
9598 | TREE_THIS_VOLATILE (decl), context_die); | |
71dfc51f | 9599 | |
273dbe67 JM |
9600 | if (TREE_PUBLIC (decl)) |
9601 | add_AT_flag (var_die, DW_AT_external, 1); | |
71dfc51f | 9602 | |
273dbe67 JM |
9603 | if (DECL_ARTIFICIAL (decl)) |
9604 | add_AT_flag (var_die, DW_AT_artificial, 1); | |
71dfc51f | 9605 | |
a94dbf2c JM |
9606 | if (TREE_PROTECTED (decl)) |
9607 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected); | |
71dfc51f | 9608 | |
a94dbf2c JM |
9609 | else if (TREE_PRIVATE (decl)) |
9610 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb | 9611 | } |
4edb7b60 JM |
9612 | |
9613 | if (declaration) | |
9614 | add_AT_flag (var_die, DW_AT_declaration, 1); | |
556273e0 | 9615 | |
9765e357 | 9616 | if (class_scope_p (context_die) || DECL_ABSTRACT (decl)) |
4edb7b60 JM |
9617 | equate_decl_number_to_die (decl, var_die); |
9618 | ||
9619 | if (! declaration && ! DECL_ABSTRACT (decl)) | |
a3f97cbb JW |
9620 | { |
9621 | add_location_or_const_value_attribute (var_die, decl); | |
d291dd49 | 9622 | add_pubname (decl, var_die); |
a3f97cbb | 9623 | } |
1bfb5f8f JM |
9624 | else |
9625 | tree_add_const_value_attribute (var_die, decl); | |
a3f97cbb JW |
9626 | } |
9627 | ||
9628 | /* Generate a DIE to represent a label identifier. */ | |
71dfc51f | 9629 | |
a3f97cbb JW |
9630 | static void |
9631 | gen_label_die (decl, context_die) | |
9632 | register tree decl; | |
9633 | register dw_die_ref context_die; | |
9634 | { | |
9635 | register tree origin = decl_ultimate_origin (decl); | |
9636 | register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die); | |
9637 | register rtx insn; | |
9638 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
71dfc51f | 9639 | |
a3f97cbb | 9640 | if (origin != NULL) |
71dfc51f | 9641 | add_abstract_origin_attribute (lbl_die, origin); |
a3f97cbb | 9642 | else |
71dfc51f RK |
9643 | add_name_and_src_coords_attributes (lbl_die, decl); |
9644 | ||
a3f97cbb | 9645 | if (DECL_ABSTRACT (decl)) |
71dfc51f | 9646 | equate_decl_number_to_die (decl, lbl_die); |
a3f97cbb JW |
9647 | else |
9648 | { | |
9649 | insn = DECL_RTL (decl); | |
088e7160 NC |
9650 | |
9651 | /* Deleted labels are programmer specified labels which have been | |
9652 | eliminated because of various optimisations. We still emit them | |
9653 | here so that it is possible to put breakpoints on them. */ | |
9654 | if (GET_CODE (insn) == CODE_LABEL | |
9655 | || ((GET_CODE (insn) == NOTE | |
9656 | && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL))) | |
a3f97cbb | 9657 | { |
556273e0 KH |
9658 | /* When optimization is enabled (via -O) some parts of the compiler |
9659 | (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which | |
a3f97cbb JW |
9660 | represent source-level labels which were explicitly declared by |
9661 | the user. This really shouldn't be happening though, so catch | |
9662 | it if it ever does happen. */ | |
9663 | if (INSN_DELETED_P (insn)) | |
71dfc51f RK |
9664 | abort (); |
9665 | ||
66234570 | 9666 | ASM_GENERATE_INTERNAL_LABEL (label, "L", CODE_LABEL_NUMBER (insn)); |
a3f97cbb JW |
9667 | add_AT_lbl_id (lbl_die, DW_AT_low_pc, label); |
9668 | } | |
9669 | } | |
9670 | } | |
9671 | ||
9672 | /* Generate a DIE for a lexical block. */ | |
71dfc51f | 9673 | |
a3f97cbb | 9674 | static void |
d7248bff | 9675 | gen_lexical_block_die (stmt, context_die, depth) |
a3f97cbb JW |
9676 | register tree stmt; |
9677 | register dw_die_ref context_die; | |
d7248bff | 9678 | int depth; |
a3f97cbb JW |
9679 | { |
9680 | register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die); | |
9681 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
71dfc51f RK |
9682 | |
9683 | if (! BLOCK_ABSTRACT (stmt)) | |
a3f97cbb | 9684 | { |
5c90448c | 9685 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, |
18c038b9 | 9686 | BLOCK_NUMBER (stmt)); |
a3f97cbb | 9687 | add_AT_lbl_id (stmt_die, DW_AT_low_pc, label); |
18c038b9 MM |
9688 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, |
9689 | BLOCK_NUMBER (stmt)); | |
a3f97cbb JW |
9690 | add_AT_lbl_id (stmt_die, DW_AT_high_pc, label); |
9691 | } | |
71dfc51f | 9692 | |
d7248bff | 9693 | decls_for_scope (stmt, stmt_die, depth); |
a3f97cbb JW |
9694 | } |
9695 | ||
9696 | /* Generate a DIE for an inlined subprogram. */ | |
71dfc51f | 9697 | |
a3f97cbb | 9698 | static void |
d7248bff | 9699 | gen_inlined_subroutine_die (stmt, context_die, depth) |
a3f97cbb JW |
9700 | register tree stmt; |
9701 | register dw_die_ref context_die; | |
d7248bff | 9702 | int depth; |
a3f97cbb | 9703 | { |
71dfc51f | 9704 | if (! BLOCK_ABSTRACT (stmt)) |
a3f97cbb | 9705 | { |
71dfc51f RK |
9706 | register dw_die_ref subr_die |
9707 | = new_die (DW_TAG_inlined_subroutine, context_die); | |
ab72d377 | 9708 | register tree decl = block_ultimate_origin (stmt); |
d7248bff | 9709 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
71dfc51f | 9710 | |
10a11b75 | 9711 | /* Emit info for the abstract instance first, if we haven't yet. */ |
1edf43d6 | 9712 | dwarf2out_abstract_function (decl); |
10a11b75 | 9713 | |
ab72d377 | 9714 | add_abstract_origin_attribute (subr_die, decl); |
5c90448c | 9715 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, |
18c038b9 | 9716 | BLOCK_NUMBER (stmt)); |
a3f97cbb | 9717 | add_AT_lbl_id (subr_die, DW_AT_low_pc, label); |
18c038b9 MM |
9718 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, |
9719 | BLOCK_NUMBER (stmt)); | |
a3f97cbb | 9720 | add_AT_lbl_id (subr_die, DW_AT_high_pc, label); |
d7248bff | 9721 | decls_for_scope (stmt, subr_die, depth); |
7e23cb16 | 9722 | current_function_has_inlines = 1; |
a3f97cbb | 9723 | } |
a3f97cbb JW |
9724 | } |
9725 | ||
9726 | /* Generate a DIE for a field in a record, or structure. */ | |
71dfc51f | 9727 | |
a3f97cbb JW |
9728 | static void |
9729 | gen_field_die (decl, context_die) | |
9730 | register tree decl; | |
9731 | register dw_die_ref context_die; | |
9732 | { | |
9733 | register dw_die_ref decl_die = new_die (DW_TAG_member, context_die); | |
71dfc51f | 9734 | |
a3f97cbb | 9735 | add_name_and_src_coords_attributes (decl_die, decl); |
a3f97cbb JW |
9736 | add_type_attribute (decl_die, member_declared_type (decl), |
9737 | TREE_READONLY (decl), TREE_THIS_VOLATILE (decl), | |
9738 | context_die); | |
71dfc51f | 9739 | |
a3f97cbb JW |
9740 | /* If this is a bit field... */ |
9741 | if (DECL_BIT_FIELD_TYPE (decl)) | |
9742 | { | |
9743 | add_byte_size_attribute (decl_die, decl); | |
9744 | add_bit_size_attribute (decl_die, decl); | |
9745 | add_bit_offset_attribute (decl_die, decl); | |
9746 | } | |
71dfc51f | 9747 | |
a94dbf2c JM |
9748 | if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE) |
9749 | add_data_member_location_attribute (decl_die, decl); | |
71dfc51f | 9750 | |
273dbe67 JM |
9751 | if (DECL_ARTIFICIAL (decl)) |
9752 | add_AT_flag (decl_die, DW_AT_artificial, 1); | |
71dfc51f | 9753 | |
a94dbf2c JM |
9754 | if (TREE_PROTECTED (decl)) |
9755 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected); | |
71dfc51f | 9756 | |
a94dbf2c JM |
9757 | else if (TREE_PRIVATE (decl)) |
9758 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb JW |
9759 | } |
9760 | ||
ab72d377 JM |
9761 | #if 0 |
9762 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. | |
9763 | Use modified_type_die instead. | |
a3f97cbb JW |
9764 | We keep this code here just in case these types of DIEs may be needed to |
9765 | represent certain things in other languages (e.g. Pascal) someday. */ | |
9766 | static void | |
9767 | gen_pointer_type_die (type, context_die) | |
9768 | register tree type; | |
9769 | register dw_die_ref context_die; | |
9770 | { | |
71dfc51f RK |
9771 | register dw_die_ref ptr_die |
9772 | = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die)); | |
9773 | ||
a3f97cbb | 9774 | equate_type_number_to_die (type, ptr_die); |
a3f97cbb | 9775 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
ab72d377 | 9776 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
a3f97cbb JW |
9777 | } |
9778 | ||
ab72d377 JM |
9779 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. |
9780 | Use modified_type_die instead. | |
a3f97cbb JW |
9781 | We keep this code here just in case these types of DIEs may be needed to |
9782 | represent certain things in other languages (e.g. Pascal) someday. */ | |
9783 | static void | |
9784 | gen_reference_type_die (type, context_die) | |
9785 | register tree type; | |
9786 | register dw_die_ref context_die; | |
9787 | { | |
71dfc51f RK |
9788 | register dw_die_ref ref_die |
9789 | = new_die (DW_TAG_reference_type, scope_die_for (type, context_die)); | |
9790 | ||
a3f97cbb | 9791 | equate_type_number_to_die (type, ref_die); |
a3f97cbb | 9792 | add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die); |
ab72d377 | 9793 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
a3f97cbb | 9794 | } |
ab72d377 | 9795 | #endif |
a3f97cbb JW |
9796 | |
9797 | /* Generate a DIE for a pointer to a member type. */ | |
9798 | static void | |
9799 | gen_ptr_to_mbr_type_die (type, context_die) | |
9800 | register tree type; | |
9801 | register dw_die_ref context_die; | |
9802 | { | |
71dfc51f RK |
9803 | register dw_die_ref ptr_die |
9804 | = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die)); | |
9805 | ||
a3f97cbb | 9806 | equate_type_number_to_die (type, ptr_die); |
a3f97cbb | 9807 | add_AT_die_ref (ptr_die, DW_AT_containing_type, |
bdb669cb | 9808 | lookup_type_die (TYPE_OFFSET_BASETYPE (type))); |
a3f97cbb JW |
9809 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
9810 | } | |
9811 | ||
9812 | /* Generate the DIE for the compilation unit. */ | |
71dfc51f | 9813 | |
a96c67ec JM |
9814 | static dw_die_ref |
9815 | gen_compile_unit_die (filename) | |
9816 | register const char *filename; | |
a3f97cbb | 9817 | { |
a96c67ec | 9818 | register dw_die_ref die; |
a3f97cbb | 9819 | char producer[250]; |
d3e3972c | 9820 | const char *wd = getpwd (); |
a96c67ec | 9821 | int language; |
a3f97cbb | 9822 | |
a96c67ec JM |
9823 | die = new_die (DW_TAG_compile_unit, NULL); |
9824 | add_name_attribute (die, filename); | |
bdb669cb | 9825 | |
a96c67ec JM |
9826 | if (wd != NULL && filename[0] != DIR_SEPARATOR) |
9827 | add_AT_string (die, DW_AT_comp_dir, wd); | |
a3f97cbb JW |
9828 | |
9829 | sprintf (producer, "%s %s", language_string, version_string); | |
9830 | ||
9831 | #ifdef MIPS_DEBUGGING_INFO | |
9832 | /* The MIPS/SGI compilers place the 'cc' command line options in the producer | |
9833 | string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do | |
9834 | not appear in the producer string, the debugger reaches the conclusion | |
9835 | that the object file is stripped and has no debugging information. | |
9836 | To get the MIPS/SGI debugger to believe that there is debugging | |
9837 | information in the object file, we add a -g to the producer string. */ | |
4927276d JM |
9838 | if (debug_info_level > DINFO_LEVEL_TERSE) |
9839 | strcat (producer, " -g"); | |
a3f97cbb JW |
9840 | #endif |
9841 | ||
a96c67ec | 9842 | add_AT_string (die, DW_AT_producer, producer); |
a9d38797 | 9843 | |
a3f97cbb | 9844 | if (strcmp (language_string, "GNU C++") == 0) |
a96c67ec | 9845 | language = DW_LANG_C_plus_plus; |
a3f97cbb | 9846 | else if (strcmp (language_string, "GNU Ada") == 0) |
a96c67ec | 9847 | language = DW_LANG_Ada83; |
a9d38797 | 9848 | else if (strcmp (language_string, "GNU F77") == 0) |
a96c67ec | 9849 | language = DW_LANG_Fortran77; |
bc28c45b | 9850 | else if (strcmp (language_string, "GNU Pascal") == 0) |
a96c67ec | 9851 | language = DW_LANG_Pascal83; |
28985b81 AG |
9852 | else if (strcmp (language_string, "GNU Java") == 0) |
9853 | language = DW_LANG_Java; | |
a3f97cbb | 9854 | else if (flag_traditional) |
a96c67ec | 9855 | language = DW_LANG_C; |
a3f97cbb | 9856 | else |
a96c67ec | 9857 | language = DW_LANG_C89; |
a9d38797 | 9858 | |
a96c67ec JM |
9859 | add_AT_unsigned (die, DW_AT_language, language); |
9860 | ||
9861 | return die; | |
a3f97cbb JW |
9862 | } |
9863 | ||
9864 | /* Generate a DIE for a string type. */ | |
71dfc51f | 9865 | |
a3f97cbb JW |
9866 | static void |
9867 | gen_string_type_die (type, context_die) | |
9868 | register tree type; | |
9869 | register dw_die_ref context_die; | |
9870 | { | |
71dfc51f RK |
9871 | register dw_die_ref type_die |
9872 | = new_die (DW_TAG_string_type, scope_die_for (type, context_die)); | |
9873 | ||
bdb669cb | 9874 | equate_type_number_to_die (type, type_die); |
a3f97cbb JW |
9875 | |
9876 | /* Fudge the string length attribute for now. */ | |
556273e0 | 9877 | |
a3f97cbb | 9878 | /* TODO: add string length info. |
71dfc51f | 9879 | string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type))); |
a3f97cbb JW |
9880 | bound_representation (upper_bound, 0, 'u'); */ |
9881 | } | |
9882 | ||
61b32c02 | 9883 | /* Generate the DIE for a base class. */ |
71dfc51f | 9884 | |
61b32c02 JM |
9885 | static void |
9886 | gen_inheritance_die (binfo, context_die) | |
9887 | register tree binfo; | |
9888 | register dw_die_ref context_die; | |
9889 | { | |
9890 | dw_die_ref die = new_die (DW_TAG_inheritance, context_die); | |
71dfc51f | 9891 | |
61b32c02 JM |
9892 | add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die); |
9893 | add_data_member_location_attribute (die, binfo); | |
71dfc51f | 9894 | |
61b32c02 JM |
9895 | if (TREE_VIA_VIRTUAL (binfo)) |
9896 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); | |
9897 | if (TREE_VIA_PUBLIC (binfo)) | |
9898 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public); | |
9899 | else if (TREE_VIA_PROTECTED (binfo)) | |
9900 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected); | |
9901 | } | |
9902 | ||
956d6950 | 9903 | /* Generate a DIE for a class member. */ |
71dfc51f | 9904 | |
a3f97cbb JW |
9905 | static void |
9906 | gen_member_die (type, context_die) | |
9907 | register tree type; | |
9908 | register dw_die_ref context_die; | |
9909 | { | |
61b32c02 | 9910 | register tree member; |
10a11b75 | 9911 | dw_die_ref child; |
71dfc51f | 9912 | |
a3f97cbb JW |
9913 | /* If this is not an incomplete type, output descriptions of each of its |
9914 | members. Note that as we output the DIEs necessary to represent the | |
9915 | members of this record or union type, we will also be trying to output | |
9916 | DIEs to represent the *types* of those members. However the `type' | |
556273e0 KH |
9917 | function (above) will specifically avoid generating type DIEs for member |
9918 | types *within* the list of member DIEs for this (containing) type execpt | |
a3f97cbb JW |
9919 | for those types (of members) which are explicitly marked as also being |
9920 | members of this (containing) type themselves. The g++ front- end can | |
9921 | force any given type to be treated as a member of some other | |
556273e0 | 9922 | (containing) type by setting the TYPE_CONTEXT of the given (member) type |
a3f97cbb JW |
9923 | to point to the TREE node representing the appropriate (containing) |
9924 | type. */ | |
9925 | ||
61b32c02 JM |
9926 | /* First output info about the base classes. */ |
9927 | if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type)) | |
a3f97cbb | 9928 | { |
61b32c02 JM |
9929 | register tree bases = TYPE_BINFO_BASETYPES (type); |
9930 | register int n_bases = TREE_VEC_LENGTH (bases); | |
9931 | register int i; | |
9932 | ||
9933 | for (i = 0; i < n_bases; i++) | |
9934 | gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die); | |
a3f97cbb JW |
9935 | } |
9936 | ||
61b32c02 JM |
9937 | /* Now output info about the data members and type members. */ |
9938 | for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) | |
10a11b75 JM |
9939 | { |
9940 | /* If we thought we were generating minimal debug info for TYPE | |
9941 | and then changed our minds, some of the member declarations | |
9942 | may have already been defined. Don't define them again, but | |
9943 | do put them in the right order. */ | |
9944 | ||
9945 | child = lookup_decl_die (member); | |
9946 | if (child) | |
9947 | splice_child_die (context_die, child); | |
9948 | else | |
9949 | gen_decl_die (member, context_die); | |
9950 | } | |
61b32c02 | 9951 | |
a3f97cbb | 9952 | /* Now output info about the function members (if any). */ |
61b32c02 | 9953 | for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member)) |
10a11b75 | 9954 | { |
5daf7c0a JM |
9955 | /* Don't include clones in the member list. */ |
9956 | if (DECL_ABSTRACT_ORIGIN (member)) | |
9957 | continue; | |
9958 | ||
10a11b75 JM |
9959 | child = lookup_decl_die (member); |
9960 | if (child) | |
9961 | splice_child_die (context_die, child); | |
9962 | else | |
9963 | gen_decl_die (member, context_die); | |
9964 | } | |
a3f97cbb JW |
9965 | } |
9966 | ||
10a11b75 JM |
9967 | /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG |
9968 | is set, we pretend that the type was never defined, so we only get the | |
9969 | member DIEs needed by later specification DIEs. */ | |
71dfc51f | 9970 | |
a3f97cbb | 9971 | static void |
273dbe67 | 9972 | gen_struct_or_union_type_die (type, context_die) |
a3f97cbb | 9973 | register tree type; |
a3f97cbb JW |
9974 | register dw_die_ref context_die; |
9975 | { | |
273dbe67 | 9976 | register dw_die_ref type_die = lookup_type_die (type); |
a082c85a JM |
9977 | register dw_die_ref scope_die = 0; |
9978 | register int nested = 0; | |
10a11b75 | 9979 | int complete = (TYPE_SIZE (type) |
65e1263a JW |
9980 | && (! TYPE_STUB_DECL (type) |
9981 | || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)))); | |
273dbe67 | 9982 | |
10a11b75 | 9983 | if (type_die && ! complete) |
273dbe67 | 9984 | return; |
a082c85a | 9985 | |
71dfc51f | 9986 | if (TYPE_CONTEXT (type) != NULL_TREE |
5f2f160c | 9987 | && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))) |
a082c85a JM |
9988 | nested = 1; |
9989 | ||
a94dbf2c | 9990 | scope_die = scope_die_for (type, context_die); |
a082c85a JM |
9991 | |
9992 | if (! type_die || (nested && scope_die == comp_unit_die)) | |
273dbe67 | 9993 | /* First occurrence of type or toplevel definition of nested class. */ |
a3f97cbb | 9994 | { |
273dbe67 | 9995 | register dw_die_ref old_die = type_die; |
71dfc51f | 9996 | |
a3f97cbb JW |
9997 | type_die = new_die (TREE_CODE (type) == RECORD_TYPE |
9998 | ? DW_TAG_structure_type : DW_TAG_union_type, | |
a082c85a | 9999 | scope_die); |
a3f97cbb | 10000 | equate_type_number_to_die (type, type_die); |
273dbe67 JM |
10001 | if (old_die) |
10002 | add_AT_die_ref (type_die, DW_AT_specification, old_die); | |
5de0e8d4 JM |
10003 | else |
10004 | add_name_attribute (type_die, type_tag (type)); | |
a3f97cbb | 10005 | } |
4b674448 | 10006 | else |
273dbe67 | 10007 | remove_AT (type_die, DW_AT_declaration); |
a3f97cbb JW |
10008 | |
10009 | /* If this type has been completed, then give it a byte_size attribute and | |
10010 | then give a list of members. */ | |
2081603c | 10011 | if (complete) |
a3f97cbb | 10012 | { |
556273e0 | 10013 | /* Prevent infinite recursion in cases where the type of some member of |
a3f97cbb JW |
10014 | this type is expressed in terms of this type itself. */ |
10015 | TREE_ASM_WRITTEN (type) = 1; | |
273dbe67 | 10016 | add_byte_size_attribute (type_die, type); |
e9a25f70 | 10017 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
b2932ae5 | 10018 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
71dfc51f | 10019 | |
ef76d03b JW |
10020 | /* If the first reference to this type was as the return type of an |
10021 | inline function, then it may not have a parent. Fix this now. */ | |
10022 | if (type_die->die_parent == NULL) | |
10023 | add_child_die (scope_die, type_die); | |
10024 | ||
273dbe67 JM |
10025 | push_decl_scope (type); |
10026 | gen_member_die (type, type_die); | |
10027 | pop_decl_scope (); | |
71dfc51f | 10028 | |
a94dbf2c JM |
10029 | /* GNU extension: Record what type our vtable lives in. */ |
10030 | if (TYPE_VFIELD (type)) | |
10031 | { | |
10032 | tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type)); | |
71dfc51f | 10033 | |
de6e505e JM |
10034 | gen_type_die (vtype, context_die); |
10035 | add_AT_die_ref (type_die, DW_AT_containing_type, | |
10036 | lookup_type_die (vtype)); | |
a94dbf2c | 10037 | } |
a3f97cbb | 10038 | } |
4b674448 | 10039 | else |
8a8c3656 JM |
10040 | { |
10041 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
a30d4514 | 10042 | |
9765e357 | 10043 | /* We don't need to do this for function-local types. */ |
f19f17e0 | 10044 | if (! decl_function_context (TYPE_STUB_DECL (type))) |
a30d4514 | 10045 | add_incomplete_type (type); |
8a8c3656 | 10046 | } |
a3f97cbb JW |
10047 | } |
10048 | ||
10049 | /* Generate a DIE for a subroutine _type_. */ | |
71dfc51f | 10050 | |
a3f97cbb JW |
10051 | static void |
10052 | gen_subroutine_type_die (type, context_die) | |
10053 | register tree type; | |
10054 | register dw_die_ref context_die; | |
10055 | { | |
10056 | register tree return_type = TREE_TYPE (type); | |
71dfc51f RK |
10057 | register dw_die_ref subr_die |
10058 | = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die)); | |
10059 | ||
a3f97cbb JW |
10060 | equate_type_number_to_die (type, subr_die); |
10061 | add_prototyped_attribute (subr_die, type); | |
a3f97cbb | 10062 | add_type_attribute (subr_die, return_type, 0, 0, context_die); |
a94dbf2c | 10063 | gen_formal_types_die (type, subr_die); |
a3f97cbb JW |
10064 | } |
10065 | ||
10066 | /* Generate a DIE for a type definition */ | |
71dfc51f | 10067 | |
a3f97cbb JW |
10068 | static void |
10069 | gen_typedef_die (decl, context_die) | |
10070 | register tree decl; | |
10071 | register dw_die_ref context_die; | |
10072 | { | |
a3f97cbb | 10073 | register dw_die_ref type_die; |
a94dbf2c JM |
10074 | register tree origin; |
10075 | ||
10076 | if (TREE_ASM_WRITTEN (decl)) | |
10077 | return; | |
10078 | TREE_ASM_WRITTEN (decl) = 1; | |
10079 | ||
777ad4c2 | 10080 | type_die = new_die (DW_TAG_typedef, context_die); |
a94dbf2c | 10081 | origin = decl_ultimate_origin (decl); |
a3f97cbb | 10082 | if (origin != NULL) |
a94dbf2c | 10083 | add_abstract_origin_attribute (type_die, origin); |
a3f97cbb JW |
10084 | else |
10085 | { | |
a94dbf2c | 10086 | register tree type; |
a3f97cbb | 10087 | add_name_and_src_coords_attributes (type_die, decl); |
a94dbf2c JM |
10088 | if (DECL_ORIGINAL_TYPE (decl)) |
10089 | { | |
10090 | type = DECL_ORIGINAL_TYPE (decl); | |
62e3bf54 JM |
10091 | |
10092 | if (type == TREE_TYPE (decl)) | |
10093 | abort (); | |
10094 | else | |
10095 | equate_type_number_to_die (TREE_TYPE (decl), type_die); | |
a94dbf2c JM |
10096 | } |
10097 | else | |
10098 | type = TREE_TYPE (decl); | |
10099 | add_type_attribute (type_die, type, TREE_READONLY (decl), | |
10100 | TREE_THIS_VOLATILE (decl), context_die); | |
a3f97cbb | 10101 | } |
71dfc51f | 10102 | |
a3f97cbb | 10103 | if (DECL_ABSTRACT (decl)) |
a94dbf2c | 10104 | equate_decl_number_to_die (decl, type_die); |
a3f97cbb JW |
10105 | } |
10106 | ||
10107 | /* Generate a type description DIE. */ | |
71dfc51f | 10108 | |
a3f97cbb JW |
10109 | static void |
10110 | gen_type_die (type, context_die) | |
10111 | register tree type; | |
10112 | register dw_die_ref context_die; | |
10113 | { | |
348bb3c7 JM |
10114 | int need_pop; |
10115 | ||
71dfc51f RK |
10116 | if (type == NULL_TREE || type == error_mark_node) |
10117 | return; | |
a3f97cbb | 10118 | |
38e01259 | 10119 | /* We are going to output a DIE to represent the unqualified version of |
a3f97cbb JW |
10120 | this type (i.e. without any const or volatile qualifiers) so get the |
10121 | main variant (i.e. the unqualified version) of this type now. */ | |
10122 | type = type_main_variant (type); | |
10123 | ||
10124 | if (TREE_ASM_WRITTEN (type)) | |
71dfc51f | 10125 | return; |
a3f97cbb | 10126 | |
a94dbf2c JM |
10127 | if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
10128 | && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) | |
556273e0 | 10129 | { |
a94dbf2c JM |
10130 | TREE_ASM_WRITTEN (type) = 1; |
10131 | gen_decl_die (TYPE_NAME (type), context_die); | |
10132 | return; | |
10133 | } | |
10134 | ||
a3f97cbb JW |
10135 | switch (TREE_CODE (type)) |
10136 | { | |
10137 | case ERROR_MARK: | |
10138 | break; | |
10139 | ||
10140 | case POINTER_TYPE: | |
10141 | case REFERENCE_TYPE: | |
956d6950 JL |
10142 | /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This |
10143 | ensures that the gen_type_die recursion will terminate even if the | |
10144 | type is recursive. Recursive types are possible in Ada. */ | |
10145 | /* ??? We could perhaps do this for all types before the switch | |
10146 | statement. */ | |
10147 | TREE_ASM_WRITTEN (type) = 1; | |
10148 | ||
a3f97cbb JW |
10149 | /* For these types, all that is required is that we output a DIE (or a |
10150 | set of DIEs) to represent the "basis" type. */ | |
10151 | gen_type_die (TREE_TYPE (type), context_die); | |
10152 | break; | |
10153 | ||
10154 | case OFFSET_TYPE: | |
556273e0 | 10155 | /* This code is used for C++ pointer-to-data-member types. |
71dfc51f | 10156 | Output a description of the relevant class type. */ |
a3f97cbb | 10157 | gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die); |
71dfc51f | 10158 | |
a3f97cbb JW |
10159 | /* Output a description of the type of the object pointed to. */ |
10160 | gen_type_die (TREE_TYPE (type), context_die); | |
71dfc51f | 10161 | |
a3f97cbb JW |
10162 | /* Now output a DIE to represent this pointer-to-data-member type |
10163 | itself. */ | |
10164 | gen_ptr_to_mbr_type_die (type, context_die); | |
10165 | break; | |
10166 | ||
10167 | case SET_TYPE: | |
10168 | gen_type_die (TYPE_DOMAIN (type), context_die); | |
10169 | gen_set_type_die (type, context_die); | |
10170 | break; | |
10171 | ||
10172 | case FILE_TYPE: | |
10173 | gen_type_die (TREE_TYPE (type), context_die); | |
10174 | abort (); /* No way to represent these in Dwarf yet! */ | |
10175 | break; | |
10176 | ||
10177 | case FUNCTION_TYPE: | |
10178 | /* Force out return type (in case it wasn't forced out already). */ | |
10179 | gen_type_die (TREE_TYPE (type), context_die); | |
10180 | gen_subroutine_type_die (type, context_die); | |
10181 | break; | |
10182 | ||
10183 | case METHOD_TYPE: | |
10184 | /* Force out return type (in case it wasn't forced out already). */ | |
10185 | gen_type_die (TREE_TYPE (type), context_die); | |
10186 | gen_subroutine_type_die (type, context_die); | |
10187 | break; | |
10188 | ||
10189 | case ARRAY_TYPE: | |
10190 | if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE) | |
10191 | { | |
10192 | gen_type_die (TREE_TYPE (type), context_die); | |
10193 | gen_string_type_die (type, context_die); | |
10194 | } | |
10195 | else | |
71dfc51f | 10196 | gen_array_type_die (type, context_die); |
a3f97cbb JW |
10197 | break; |
10198 | ||
4061f623 BS |
10199 | case VECTOR_TYPE: |
10200 | gen_type_die (TYPE_DEBUG_REPRESENTATION_TYPE (type), context_die); | |
10201 | break; | |
10202 | ||
a3f97cbb JW |
10203 | case ENUMERAL_TYPE: |
10204 | case RECORD_TYPE: | |
10205 | case UNION_TYPE: | |
10206 | case QUAL_UNION_TYPE: | |
a082c85a | 10207 | /* If this is a nested type whose containing class hasn't been |
348bb3c7 JM |
10208 | written out yet, writing it out will cover this one, too. |
10209 | This does not apply to instantiations of member class templates; | |
10210 | they need to be added to the containing class as they are | |
777ad4c2 | 10211 | generated. FIXME: This hurts the idea of combining type decls |
348bb3c7 JM |
10212 | from multiple TUs, since we can't predict what set of template |
10213 | instantiations we'll get. */ | |
a082c85a | 10214 | if (TYPE_CONTEXT (type) |
5f2f160c | 10215 | && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
a082c85a | 10216 | && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type))) |
a94dbf2c JM |
10217 | { |
10218 | gen_type_die (TYPE_CONTEXT (type), context_die); | |
10219 | ||
348bb3c7 | 10220 | if (TREE_ASM_WRITTEN (type)) |
a94dbf2c JM |
10221 | return; |
10222 | ||
10223 | /* If that failed, attach ourselves to the stub. */ | |
10224 | push_decl_scope (TYPE_CONTEXT (type)); | |
10225 | context_die = lookup_type_die (TYPE_CONTEXT (type)); | |
348bb3c7 | 10226 | need_pop = 1; |
a94dbf2c | 10227 | } |
348bb3c7 JM |
10228 | else |
10229 | need_pop = 0; | |
a94dbf2c JM |
10230 | |
10231 | if (TREE_CODE (type) == ENUMERAL_TYPE) | |
273dbe67 | 10232 | gen_enumeration_type_die (type, context_die); |
a3f97cbb | 10233 | else |
273dbe67 | 10234 | gen_struct_or_union_type_die (type, context_die); |
4b674448 | 10235 | |
348bb3c7 | 10236 | if (need_pop) |
a94dbf2c JM |
10237 | pop_decl_scope (); |
10238 | ||
4b674448 | 10239 | /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix |
a082c85a JM |
10240 | it up if it is ever completed. gen_*_type_die will set it for us |
10241 | when appropriate. */ | |
10242 | return; | |
a3f97cbb JW |
10243 | |
10244 | case VOID_TYPE: | |
10245 | case INTEGER_TYPE: | |
10246 | case REAL_TYPE: | |
10247 | case COMPLEX_TYPE: | |
10248 | case BOOLEAN_TYPE: | |
10249 | case CHAR_TYPE: | |
10250 | /* No DIEs needed for fundamental types. */ | |
10251 | break; | |
10252 | ||
10253 | case LANG_TYPE: | |
10254 | /* No Dwarf representation currently defined. */ | |
10255 | break; | |
10256 | ||
10257 | default: | |
10258 | abort (); | |
10259 | } | |
10260 | ||
10261 | TREE_ASM_WRITTEN (type) = 1; | |
10262 | } | |
10263 | ||
10264 | /* Generate a DIE for a tagged type instantiation. */ | |
71dfc51f | 10265 | |
a3f97cbb JW |
10266 | static void |
10267 | gen_tagged_type_instantiation_die (type, context_die) | |
10268 | register tree type; | |
10269 | register dw_die_ref context_die; | |
10270 | { | |
71dfc51f RK |
10271 | if (type == NULL_TREE || type == error_mark_node) |
10272 | return; | |
a3f97cbb | 10273 | |
38e01259 | 10274 | /* We are going to output a DIE to represent the unqualified version of |
a3f97cbb JW |
10275 | this type (i.e. without any const or volatile qualifiers) so make sure |
10276 | that we have the main variant (i.e. the unqualified version) of this | |
10277 | type now. */ | |
bbc6ae08 | 10278 | if (type != type_main_variant (type)) |
3a88cbd1 | 10279 | abort (); |
a3f97cbb | 10280 | |
203588e7 | 10281 | /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is |
bbc6ae08 | 10282 | an instance of an unresolved type. */ |
556273e0 | 10283 | |
a3f97cbb JW |
10284 | switch (TREE_CODE (type)) |
10285 | { | |
10286 | case ERROR_MARK: | |
10287 | break; | |
10288 | ||
10289 | case ENUMERAL_TYPE: | |
10290 | gen_inlined_enumeration_type_die (type, context_die); | |
10291 | break; | |
10292 | ||
10293 | case RECORD_TYPE: | |
10294 | gen_inlined_structure_type_die (type, context_die); | |
10295 | break; | |
10296 | ||
10297 | case UNION_TYPE: | |
10298 | case QUAL_UNION_TYPE: | |
10299 | gen_inlined_union_type_die (type, context_die); | |
10300 | break; | |
10301 | ||
10302 | default: | |
71dfc51f | 10303 | abort (); |
a3f97cbb JW |
10304 | } |
10305 | } | |
10306 | ||
10307 | /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the | |
10308 | things which are local to the given block. */ | |
71dfc51f | 10309 | |
a3f97cbb | 10310 | static void |
d7248bff | 10311 | gen_block_die (stmt, context_die, depth) |
a3f97cbb JW |
10312 | register tree stmt; |
10313 | register dw_die_ref context_die; | |
d7248bff | 10314 | int depth; |
a3f97cbb JW |
10315 | { |
10316 | register int must_output_die = 0; | |
10317 | register tree origin; | |
10318 | register tree decl; | |
10319 | register enum tree_code origin_code; | |
10320 | ||
10321 | /* Ignore blocks never really used to make RTL. */ | |
10322 | ||
1e7f092a JM |
10323 | if (stmt == NULL_TREE || !TREE_USED (stmt) |
10324 | || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt))) | |
71dfc51f | 10325 | return; |
a3f97cbb JW |
10326 | |
10327 | /* Determine the "ultimate origin" of this block. This block may be an | |
10328 | inlined instance of an inlined instance of inline function, so we have | |
10329 | to trace all of the way back through the origin chain to find out what | |
10330 | sort of node actually served as the original seed for the creation of | |
10331 | the current block. */ | |
10332 | origin = block_ultimate_origin (stmt); | |
10333 | origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK; | |
10334 | ||
10335 | /* Determine if we need to output any Dwarf DIEs at all to represent this | |
10336 | block. */ | |
10337 | if (origin_code == FUNCTION_DECL) | |
71dfc51f RK |
10338 | /* The outer scopes for inlinings *must* always be represented. We |
10339 | generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */ | |
10340 | must_output_die = 1; | |
a3f97cbb JW |
10341 | else |
10342 | { | |
10343 | /* In the case where the current block represents an inlining of the | |
556273e0 | 10344 | "body block" of an inline function, we must *NOT* output any DIE for |
a3f97cbb JW |
10345 | this block because we have already output a DIE to represent the |
10346 | whole inlined function scope and the "body block" of any function | |
10347 | doesn't really represent a different scope according to ANSI C | |
10348 | rules. So we check here to make sure that this block does not | |
10349 | represent a "body block inlining" before trying to set the | |
10350 | `must_output_die' flag. */ | |
d7248bff | 10351 | if (! is_body_block (origin ? origin : stmt)) |
a3f97cbb JW |
10352 | { |
10353 | /* Determine if this block directly contains any "significant" | |
10354 | local declarations which we will need to output DIEs for. */ | |
10355 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
71dfc51f RK |
10356 | /* We are not in terse mode so *any* local declaration counts |
10357 | as being a "significant" one. */ | |
10358 | must_output_die = (BLOCK_VARS (stmt) != NULL); | |
a3f97cbb | 10359 | else |
71dfc51f RK |
10360 | /* We are in terse mode, so only local (nested) function |
10361 | definitions count as "significant" local declarations. */ | |
10362 | for (decl = BLOCK_VARS (stmt); | |
10363 | decl != NULL; decl = TREE_CHAIN (decl)) | |
10364 | if (TREE_CODE (decl) == FUNCTION_DECL | |
10365 | && DECL_INITIAL (decl)) | |
a3f97cbb | 10366 | { |
71dfc51f RK |
10367 | must_output_die = 1; |
10368 | break; | |
a3f97cbb | 10369 | } |
a3f97cbb JW |
10370 | } |
10371 | } | |
10372 | ||
10373 | /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block | |
10374 | DIE for any block which contains no significant local declarations at | |
10375 | all. Rather, in such cases we just call `decls_for_scope' so that any | |
10376 | needed Dwarf info for any sub-blocks will get properly generated. Note | |
10377 | that in terse mode, our definition of what constitutes a "significant" | |
10378 | local declaration gets restricted to include only inlined function | |
10379 | instances and local (nested) function definitions. */ | |
10380 | if (must_output_die) | |
10381 | { | |
10382 | if (origin_code == FUNCTION_DECL) | |
71dfc51f | 10383 | gen_inlined_subroutine_die (stmt, context_die, depth); |
a3f97cbb | 10384 | else |
71dfc51f | 10385 | gen_lexical_block_die (stmt, context_die, depth); |
a3f97cbb JW |
10386 | } |
10387 | else | |
d7248bff | 10388 | decls_for_scope (stmt, context_die, depth); |
a3f97cbb JW |
10389 | } |
10390 | ||
10391 | /* Generate all of the decls declared within a given scope and (recursively) | |
9ec36da5 | 10392 | all of its sub-blocks. */ |
71dfc51f | 10393 | |
a3f97cbb | 10394 | static void |
d7248bff | 10395 | decls_for_scope (stmt, context_die, depth) |
a3f97cbb JW |
10396 | register tree stmt; |
10397 | register dw_die_ref context_die; | |
d7248bff | 10398 | int depth; |
a3f97cbb JW |
10399 | { |
10400 | register tree decl; | |
10401 | register tree subblocks; | |
71dfc51f | 10402 | |
a3f97cbb | 10403 | /* Ignore blocks never really used to make RTL. */ |
71dfc51f RK |
10404 | if (stmt == NULL_TREE || ! TREE_USED (stmt)) |
10405 | return; | |
10406 | ||
88dad228 JM |
10407 | /* Output the DIEs to represent all of the data objects and typedefs |
10408 | declared directly within this block but not within any nested | |
10409 | sub-blocks. Also, nested function and tag DIEs have been | |
10410 | generated with a parent of NULL; fix that up now. */ | |
a3f97cbb JW |
10411 | for (decl = BLOCK_VARS (stmt); |
10412 | decl != NULL; decl = TREE_CHAIN (decl)) | |
10413 | { | |
a94dbf2c JM |
10414 | register dw_die_ref die; |
10415 | ||
88dad228 | 10416 | if (TREE_CODE (decl) == FUNCTION_DECL) |
a94dbf2c | 10417 | die = lookup_decl_die (decl); |
88dad228 | 10418 | else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)) |
a94dbf2c JM |
10419 | die = lookup_type_die (TREE_TYPE (decl)); |
10420 | else | |
10421 | die = NULL; | |
10422 | ||
71dfc51f | 10423 | if (die != NULL && die->die_parent == NULL) |
ef76d03b | 10424 | add_child_die (context_die, die); |
88dad228 JM |
10425 | else |
10426 | gen_decl_die (decl, context_die); | |
a3f97cbb JW |
10427 | } |
10428 | ||
10429 | /* Output the DIEs to represent all sub-blocks (and the items declared | |
10430 | therein) of this block. */ | |
10431 | for (subblocks = BLOCK_SUBBLOCKS (stmt); | |
10432 | subblocks != NULL; | |
10433 | subblocks = BLOCK_CHAIN (subblocks)) | |
71dfc51f | 10434 | gen_block_die (subblocks, context_die, depth + 1); |
a3f97cbb JW |
10435 | } |
10436 | ||
a94dbf2c | 10437 | /* Is this a typedef we can avoid emitting? */ |
71dfc51f RK |
10438 | |
10439 | static inline int | |
a94dbf2c JM |
10440 | is_redundant_typedef (decl) |
10441 | register tree decl; | |
10442 | { | |
10443 | if (TYPE_DECL_IS_STUB (decl)) | |
10444 | return 1; | |
71dfc51f | 10445 | |
a94dbf2c JM |
10446 | if (DECL_ARTIFICIAL (decl) |
10447 | && DECL_CONTEXT (decl) | |
10448 | && is_tagged_type (DECL_CONTEXT (decl)) | |
10449 | && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL | |
10450 | && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl)))) | |
10451 | /* Also ignore the artificial member typedef for the class name. */ | |
10452 | return 1; | |
71dfc51f | 10453 | |
a94dbf2c JM |
10454 | return 0; |
10455 | } | |
10456 | ||
a3f97cbb | 10457 | /* Generate Dwarf debug information for a decl described by DECL. */ |
71dfc51f | 10458 | |
a3f97cbb JW |
10459 | static void |
10460 | gen_decl_die (decl, context_die) | |
10461 | register tree decl; | |
10462 | register dw_die_ref context_die; | |
10463 | { | |
10464 | register tree origin; | |
71dfc51f | 10465 | |
a3f97cbb | 10466 | if (TREE_CODE (decl) == ERROR_MARK) |
71dfc51f | 10467 | return; |
a3f97cbb | 10468 | |
fcd7f76b JM |
10469 | /* If this ..._DECL node is marked to be ignored, then ignore it. */ |
10470 | if (DECL_IGNORED_P (decl)) | |
71dfc51f | 10471 | return; |
a3f97cbb | 10472 | |
a3f97cbb JW |
10473 | switch (TREE_CODE (decl)) |
10474 | { | |
10475 | case CONST_DECL: | |
556273e0 | 10476 | /* The individual enumerators of an enum type get output when we output |
a3f97cbb JW |
10477 | the Dwarf representation of the relevant enum type itself. */ |
10478 | break; | |
10479 | ||
10480 | case FUNCTION_DECL: | |
4edb7b60 JM |
10481 | /* Don't output any DIEs to represent mere function declarations, |
10482 | unless they are class members or explicit block externs. */ | |
10483 | if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE | |
777ad4c2 | 10484 | && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl))) |
71dfc51f | 10485 | break; |
bdb669cb | 10486 | |
5daf7c0a JM |
10487 | /* If we're emitting a clone, emit info for the abstract instance. */ |
10488 | if (DECL_ORIGIN (decl) != decl) | |
10489 | dwarf2out_abstract_function (DECL_ABSTRACT_ORIGIN (decl)); | |
1cfdcc15 JM |
10490 | /* If we're emitting an out-of-line copy of an inline function, |
10491 | emit info for the abstract instance and set up to refer to it. */ | |
5daf7c0a JM |
10492 | else if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl) |
10493 | && ! class_scope_p (context_die) | |
10494 | /* dwarf2out_abstract_function won't emit a die if this is just | |
10495 | a declaration. We must avoid setting DECL_ABSTRACT_ORIGIN in | |
10496 | that case, because that works only if we have a die. */ | |
10497 | && DECL_INITIAL (decl) != NULL_TREE) | |
1cfdcc15 | 10498 | { |
1edf43d6 | 10499 | dwarf2out_abstract_function (decl); |
1cfdcc15 JM |
10500 | set_decl_origin_self (decl); |
10501 | } | |
5daf7c0a JM |
10502 | /* Otherwise we're emitting the primary DIE for this decl. */ |
10503 | else if (debug_info_level > DINFO_LEVEL_TERSE) | |
a94dbf2c JM |
10504 | { |
10505 | /* Before we describe the FUNCTION_DECL itself, make sure that we | |
10506 | have described its return type. */ | |
10507 | gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die); | |
10508 | ||
2081603c JM |
10509 | /* And its virtual context. */ |
10510 | if (DECL_VINDEX (decl) != NULL_TREE) | |
10511 | gen_type_die (DECL_CONTEXT (decl), context_die); | |
10512 | ||
a94dbf2c JM |
10513 | /* And its containing type. */ |
10514 | origin = decl_class_context (decl); | |
71dfc51f | 10515 | if (origin != NULL_TREE) |
10a11b75 | 10516 | gen_type_die_for_member (origin, decl, context_die); |
a94dbf2c | 10517 | } |
a3f97cbb JW |
10518 | |
10519 | /* Now output a DIE to represent the function itself. */ | |
10520 | gen_subprogram_die (decl, context_die); | |
10521 | break; | |
10522 | ||
10523 | case TYPE_DECL: | |
10524 | /* If we are in terse mode, don't generate any DIEs to represent any | |
4927276d | 10525 | actual typedefs. */ |
a3f97cbb | 10526 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
4927276d | 10527 | break; |
a3f97cbb | 10528 | |
556273e0 | 10529 | /* In the special case of a TYPE_DECL node representing the |
5c90448c | 10530 | declaration of some type tag, if the given TYPE_DECL is marked as |
a3f97cbb JW |
10531 | having been instantiated from some other (original) TYPE_DECL node |
10532 | (e.g. one which was generated within the original definition of an | |
10533 | inline function) we have to generate a special (abbreviated) | |
556273e0 | 10534 | DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type |
a3f97cbb | 10535 | DIE here. */ |
2081603c | 10536 | if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE) |
a3f97cbb JW |
10537 | { |
10538 | gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die); | |
10539 | break; | |
10540 | } | |
a3f97cbb | 10541 | |
a94dbf2c JM |
10542 | if (is_redundant_typedef (decl)) |
10543 | gen_type_die (TREE_TYPE (decl), context_die); | |
10544 | else | |
71dfc51f RK |
10545 | /* Output a DIE to represent the typedef itself. */ |
10546 | gen_typedef_die (decl, context_die); | |
a3f97cbb JW |
10547 | break; |
10548 | ||
10549 | case LABEL_DECL: | |
10550 | if (debug_info_level >= DINFO_LEVEL_NORMAL) | |
71dfc51f | 10551 | gen_label_die (decl, context_die); |
a3f97cbb JW |
10552 | break; |
10553 | ||
10554 | case VAR_DECL: | |
10555 | /* If we are in terse mode, don't generate any DIEs to represent any | |
10556 | variable declarations or definitions. */ | |
10557 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
71dfc51f | 10558 | break; |
a3f97cbb JW |
10559 | |
10560 | /* Output any DIEs that are needed to specify the type of this data | |
10561 | object. */ | |
10562 | gen_type_die (TREE_TYPE (decl), context_die); | |
10563 | ||
a94dbf2c JM |
10564 | /* And its containing type. */ |
10565 | origin = decl_class_context (decl); | |
71dfc51f | 10566 | if (origin != NULL_TREE) |
10a11b75 | 10567 | gen_type_die_for_member (origin, decl, context_die); |
a94dbf2c | 10568 | |
a3f97cbb JW |
10569 | /* Now output the DIE to represent the data object itself. This gets |
10570 | complicated because of the possibility that the VAR_DECL really | |
10571 | represents an inlined instance of a formal parameter for an inline | |
10572 | function. */ | |
10573 | origin = decl_ultimate_origin (decl); | |
71dfc51f RK |
10574 | if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL) |
10575 | gen_formal_parameter_die (decl, context_die); | |
a3f97cbb | 10576 | else |
71dfc51f | 10577 | gen_variable_die (decl, context_die); |
a3f97cbb JW |
10578 | break; |
10579 | ||
10580 | case FIELD_DECL: | |
a94dbf2c JM |
10581 | /* Ignore the nameless fields that are used to skip bits, but |
10582 | handle C++ anonymous unions. */ | |
71dfc51f RK |
10583 | if (DECL_NAME (decl) != NULL_TREE |
10584 | || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE) | |
a3f97cbb JW |
10585 | { |
10586 | gen_type_die (member_declared_type (decl), context_die); | |
10587 | gen_field_die (decl, context_die); | |
10588 | } | |
10589 | break; | |
10590 | ||
10591 | case PARM_DECL: | |
10592 | gen_type_die (TREE_TYPE (decl), context_die); | |
10593 | gen_formal_parameter_die (decl, context_die); | |
10594 | break; | |
10595 | ||
348bb3c7 JM |
10596 | case NAMESPACE_DECL: |
10597 | /* Ignore for now. */ | |
10598 | break; | |
10599 | ||
a3f97cbb JW |
10600 | default: |
10601 | abort (); | |
10602 | } | |
a3f97cbb JW |
10603 | } |
10604 | \f | |
14a774a9 RK |
10605 | /* Add Ada "use" clause information for SGI Workshop debugger. */ |
10606 | ||
10607 | void | |
10608 | dwarf2out_add_library_unit_info (filename, context_list) | |
c6991660 KG |
10609 | const char *filename; |
10610 | const char *context_list; | |
14a774a9 RK |
10611 | { |
10612 | unsigned int file_index; | |
10613 | ||
10614 | if (filename != NULL) | |
10615 | { | |
10616 | dw_die_ref unit_die = new_die (DW_TAG_module, comp_unit_die); | |
556273e0 | 10617 | tree context_list_decl |
14a774a9 RK |
10618 | = build_decl (LABEL_DECL, get_identifier (context_list), |
10619 | void_type_node); | |
10620 | ||
10621 | TREE_PUBLIC (context_list_decl) = TRUE; | |
10622 | add_name_attribute (unit_die, context_list); | |
2e18bbae | 10623 | file_index = lookup_filename (&decl_file_table, filename); |
14a774a9 RK |
10624 | add_AT_unsigned (unit_die, DW_AT_decl_file, file_index); |
10625 | add_pubname (context_list_decl, unit_die); | |
10626 | } | |
10627 | } | |
10628 | ||
71dfc51f RK |
10629 | /* Write the debugging output for DECL. */ |
10630 | ||
a3f97cbb | 10631 | void |
88dad228 | 10632 | dwarf2out_decl (decl) |
a3f97cbb | 10633 | register tree decl; |
a3f97cbb | 10634 | { |
88dad228 JM |
10635 | register dw_die_ref context_die = comp_unit_die; |
10636 | ||
a3f97cbb | 10637 | if (TREE_CODE (decl) == ERROR_MARK) |
71dfc51f | 10638 | return; |
a3f97cbb | 10639 | |
fcd7f76b | 10640 | /* If this ..._DECL node is marked to be ignored, then ignore it. */ |
a3f97cbb | 10641 | if (DECL_IGNORED_P (decl)) |
fcd7f76b | 10642 | return; |
a3f97cbb JW |
10643 | |
10644 | switch (TREE_CODE (decl)) | |
10645 | { | |
10646 | case FUNCTION_DECL: | |
556273e0 | 10647 | /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a |
a3f97cbb JW |
10648 | builtin function. Explicit programmer-supplied declarations of |
10649 | these same functions should NOT be ignored however. */ | |
9765e357 | 10650 | if (DECL_EXTERNAL (decl) && DECL_BUILT_IN (decl)) |
b1ccbc24 | 10651 | return; |
a3f97cbb JW |
10652 | |
10653 | /* What we would really like to do here is to filter out all mere | |
10654 | file-scope declarations of file-scope functions which are never | |
10655 | referenced later within this translation unit (and keep all of ones | |
556273e0 KH |
10656 | that *are* referenced later on) but we aren't clairvoyant, so we have |
10657 | no idea which functions will be referenced in the future (i.e. later | |
a3f97cbb | 10658 | on within the current translation unit). So here we just ignore all |
556273e0 | 10659 | file-scope function declarations which are not also definitions. If |
956d6950 | 10660 | and when the debugger needs to know something about these functions, |
556273e0 | 10661 | it will have to hunt around and find the DWARF information associated |
bbc6ae08 | 10662 | with the definition of the function. Note that we can't just check |
a3f97cbb JW |
10663 | `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent |
10664 | definitions and which ones represent mere declarations. We have to | |
10665 | check `DECL_INITIAL' instead. That's because the C front-end | |
10666 | supports some weird semantics for "extern inline" function | |
10667 | definitions. These can get inlined within the current translation | |
10668 | unit (an thus, we need to generate DWARF info for their abstract | |
10669 | instances so that the DWARF info for the concrete inlined instances | |
556273e0 | 10670 | can have something to refer to) but the compiler never generates any |
a3f97cbb JW |
10671 | out-of-lines instances of such things (despite the fact that they |
10672 | *are* definitions). The important point is that the C front-end | |
10673 | marks these "extern inline" functions as DECL_EXTERNAL, but we need | |
273dbe67 | 10674 | to generate DWARF for them anyway. Note that the C++ front-end also |
a3f97cbb | 10675 | plays some similar games for inline function definitions appearing |
556273e0 | 10676 | within include files which also contain |
a3f97cbb JW |
10677 | `#pragma interface' pragmas. */ |
10678 | if (DECL_INITIAL (decl) == NULL_TREE) | |
b1ccbc24 | 10679 | return; |
88dad228 | 10680 | |
9c6cd30e JM |
10681 | /* If we're a nested function, initially use a parent of NULL; if we're |
10682 | a plain function, this will be fixed up in decls_for_scope. If | |
10683 | we're a method, it will be ignored, since we already have a DIE. */ | |
88dad228 | 10684 | if (decl_function_context (decl)) |
9c6cd30e | 10685 | context_die = NULL; |
88dad228 | 10686 | |
a3f97cbb JW |
10687 | break; |
10688 | ||
10689 | case VAR_DECL: | |
556273e0 | 10690 | /* Ignore this VAR_DECL if it refers to a file-scope extern data object |
a3f97cbb JW |
10691 | declaration and if the declaration was never even referenced from |
10692 | within this entire compilation unit. We suppress these DIEs in | |
10693 | order to save space in the .debug section (by eliminating entries | |
10694 | which are probably useless). Note that we must not suppress | |
10695 | block-local extern declarations (whether used or not) because that | |
10696 | would screw-up the debugger's name lookup mechanism and cause it to | |
10697 | miss things which really ought to be in scope at a given point. */ | |
10698 | if (DECL_EXTERNAL (decl) && !TREE_USED (decl)) | |
71dfc51f | 10699 | return; |
a3f97cbb JW |
10700 | |
10701 | /* If we are in terse mode, don't generate any DIEs to represent any | |
10702 | variable declarations or definitions. */ | |
10703 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
71dfc51f | 10704 | return; |
a3f97cbb JW |
10705 | break; |
10706 | ||
10707 | case TYPE_DECL: | |
57fb7689 JM |
10708 | /* Don't emit stubs for types unless they are needed by other DIEs. */ |
10709 | if (TYPE_DECL_SUPPRESS_DEBUG (decl)) | |
10710 | return; | |
10711 | ||
a3f97cbb | 10712 | /* Don't bother trying to generate any DIEs to represent any of the |
a9d38797 JM |
10713 | normal built-in types for the language we are compiling. */ |
10714 | if (DECL_SOURCE_LINE (decl) == 0) | |
a94dbf2c JM |
10715 | { |
10716 | /* OK, we need to generate one for `bool' so GDB knows what type | |
10717 | comparisons have. */ | |
10718 | if ((get_AT_unsigned (comp_unit_die, DW_AT_language) | |
10719 | == DW_LANG_C_plus_plus) | |
10720 | && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE) | |
10721 | modified_type_die (TREE_TYPE (decl), 0, 0, NULL); | |
71dfc51f | 10722 | |
a94dbf2c JM |
10723 | return; |
10724 | } | |
a3f97cbb | 10725 | |
88dad228 | 10726 | /* If we are in terse mode, don't generate any DIEs for types. */ |
a3f97cbb | 10727 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
4927276d | 10728 | return; |
88dad228 JM |
10729 | |
10730 | /* If we're a function-scope tag, initially use a parent of NULL; | |
10731 | this will be fixed up in decls_for_scope. */ | |
10732 | if (decl_function_context (decl)) | |
3f76745e | 10733 | context_die = NULL; |
88dad228 | 10734 | |
a3f97cbb JW |
10735 | break; |
10736 | ||
10737 | default: | |
10738 | return; | |
10739 | } | |
10740 | ||
88dad228 | 10741 | gen_decl_die (decl, context_die); |
a3f97cbb JW |
10742 | } |
10743 | ||
10744 | /* Output a marker (i.e. a label) for the beginning of the generated code for | |
10745 | a lexical block. */ | |
71dfc51f | 10746 | |
a3f97cbb | 10747 | void |
9a666dda | 10748 | dwarf2out_begin_block (blocknum) |
a3f97cbb JW |
10749 | register unsigned blocknum; |
10750 | { | |
a3f97cbb | 10751 | function_section (current_function_decl); |
8215347e | 10752 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum); |
a3f97cbb JW |
10753 | } |
10754 | ||
10755 | /* Output a marker (i.e. a label) for the end of the generated code for a | |
10756 | lexical block. */ | |
71dfc51f | 10757 | |
a3f97cbb | 10758 | void |
9a666dda | 10759 | dwarf2out_end_block (blocknum) |
a3f97cbb JW |
10760 | register unsigned blocknum; |
10761 | { | |
a3f97cbb | 10762 | function_section (current_function_decl); |
8215347e | 10763 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum); |
a3f97cbb JW |
10764 | } |
10765 | ||
64b59a80 JM |
10766 | /* Returns nonzero if it is appropriate not to emit any debugging |
10767 | information for BLOCK, because it doesn't contain any instructions. | |
fcd7f76b | 10768 | |
64b59a80 JM |
10769 | Don't allow this for blocks with nested functions or local classes |
10770 | as we would end up with orphans, and in the presence of scheduling | |
10771 | we may end up calling them anyway. */ | |
10772 | ||
10773 | int | |
fcd7f76b JM |
10774 | dwarf2out_ignore_block (block) |
10775 | tree block; | |
10776 | { | |
10777 | tree decl; | |
10778 | for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl)) | |
64b59a80 JM |
10779 | if (TREE_CODE (decl) == FUNCTION_DECL |
10780 | || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))) | |
10781 | return 0; | |
10782 | return 1; | |
fcd7f76b JM |
10783 | } |
10784 | ||
a3f97cbb | 10785 | /* Lookup a filename (in the list of filenames that we know about here in |
9a666dda | 10786 | dwarf2out.c) and return its "index". The index of each (known) filename is |
a3f97cbb JW |
10787 | just a unique number which is associated with only that one filename. |
10788 | We need such numbers for the sake of generating labels | |
10789 | (in the .debug_sfnames section) and references to those | |
10790 | files numbers (in the .debug_srcinfo and.debug_macinfo sections). | |
10791 | If the filename given as an argument is not found in our current list, | |
10792 | add it to the list and assign it the next available unique index number. | |
10793 | In order to speed up searches, we remember the index of the filename | |
10794 | was looked up last. This handles the majority of all searches. */ | |
71dfc51f | 10795 | |
a3f97cbb | 10796 | static unsigned |
2e18bbae RH |
10797 | lookup_filename (t, file_name) |
10798 | struct file_table *t; | |
d560ee52 | 10799 | const char *file_name; |
a3f97cbb | 10800 | { |
a3f97cbb JW |
10801 | register unsigned i; |
10802 | ||
2e18bbae RH |
10803 | /* Check to see if the file name that was searched on the previous |
10804 | call matches this file name. If so, return the index. */ | |
10805 | if (t->last_lookup_index != 0) | |
10806 | if (strcmp (file_name, t->table[t->last_lookup_index]) == 0) | |
10807 | return t->last_lookup_index; | |
a3f97cbb JW |
10808 | |
10809 | /* Didn't match the previous lookup, search the table */ | |
2e18bbae RH |
10810 | for (i = 1; i < t->in_use; ++i) |
10811 | if (strcmp (file_name, t->table[i]) == 0) | |
71dfc51f | 10812 | { |
2e18bbae | 10813 | t->last_lookup_index = i; |
71dfc51f RK |
10814 | return i; |
10815 | } | |
a3f97cbb | 10816 | |
556273e0 | 10817 | /* Prepare to add a new table entry by making sure there is enough space in |
a3f97cbb | 10818 | the table to do so. If not, expand the current table. */ |
2e18bbae | 10819 | if (i == t->allocated) |
a3f97cbb | 10820 | { |
2e18bbae RH |
10821 | t->allocated = i + FILE_TABLE_INCREMENT; |
10822 | t->table = (char **) | |
10823 | xrealloc (t->table, t->allocated * sizeof (char *)); | |
a3f97cbb JW |
10824 | } |
10825 | ||
71dfc51f | 10826 | /* Add the new entry to the end of the filename table. */ |
2e18bbae RH |
10827 | t->table[i] = xstrdup (file_name); |
10828 | t->in_use = i + 1; | |
10829 | t->last_lookup_index = i; | |
10830 | ||
10831 | return i; | |
10832 | } | |
10833 | ||
10834 | static void | |
10835 | init_file_table (t) | |
10836 | struct file_table *t; | |
10837 | { | |
10838 | /* Allocate the initial hunk of the file_table. */ | |
10839 | t->table = (char **) xcalloc (FILE_TABLE_INCREMENT, sizeof (char *)); | |
10840 | t->allocated = FILE_TABLE_INCREMENT; | |
71dfc51f | 10841 | |
2e18bbae RH |
10842 | /* Skip the first entry - file numbers begin at 1. */ |
10843 | t->in_use = 1; | |
10844 | t->last_lookup_index = 0; | |
a3f97cbb JW |
10845 | } |
10846 | ||
10847 | /* Output a label to mark the beginning of a source code line entry | |
10848 | and record information relating to this source line, in | |
10849 | 'line_info_table' for later output of the .debug_line section. */ | |
71dfc51f | 10850 | |
a3f97cbb | 10851 | void |
9a666dda | 10852 | dwarf2out_line (filename, line) |
d560ee52 | 10853 | register const char *filename; |
a3f97cbb JW |
10854 | register unsigned line; |
10855 | { | |
a3f97cbb JW |
10856 | if (debug_info_level >= DINFO_LEVEL_NORMAL) |
10857 | { | |
10858 | function_section (current_function_decl); | |
a3f97cbb | 10859 | |
b2244e22 JW |
10860 | if (DWARF2_ASM_LINE_DEBUG_INFO) |
10861 | { | |
fc608b03 | 10862 | #if 0 |
2e18bbae | 10863 | unsigned old_in_use = line_file_table.in_use; |
fc608b03 | 10864 | #endif |
2e18bbae | 10865 | unsigned file_num = lookup_filename (&line_file_table, filename); |
b2244e22 JW |
10866 | |
10867 | /* Emit the .file and .loc directives understood by GNU as. */ | |
2e18bbae | 10868 | #if 0 |
0b34cf1e | 10869 | /* ??? As of 2000-11-25, gas has a bug in which it doesn't |
2e18bbae RH |
10870 | actually use the file number argument. It merely remembers |
10871 | the last .file directive emitted. */ | |
10872 | if (file_num >= old_in_use) | |
10873 | fprintf (asm_out_file, "\t.file %d \"%s\"\n", file_num, filename); | |
10874 | fprintf (asm_out_file, "\t.loc %d %d 0\n", file_num, line); | |
10875 | #else | |
0024a804 | 10876 | static unsigned int last_file_num; |
2e18bbae | 10877 | if (file_num != last_file_num) |
b2244e22 | 10878 | { |
2e18bbae | 10879 | last_file_num = file_num; |
b2244e22 | 10880 | fprintf (asm_out_file, "\t.file 0 \"%s\"\n", filename); |
b2244e22 | 10881 | } |
b2244e22 | 10882 | fprintf (asm_out_file, "\t.loc 0 %d 0\n", line); |
2e18bbae | 10883 | #endif |
b2244e22 JW |
10884 | |
10885 | /* Indicate that line number info exists. */ | |
10886 | ++line_info_table_in_use; | |
10887 | ||
10888 | /* Indicate that multiple line number tables exist. */ | |
10889 | if (DECL_SECTION_NAME (current_function_decl)) | |
10890 | ++separate_line_info_table_in_use; | |
10891 | } | |
10892 | else if (DECL_SECTION_NAME (current_function_decl)) | |
a3f97cbb | 10893 | { |
e90b62db | 10894 | register dw_separate_line_info_ref line_info; |
5c90448c JM |
10895 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL, |
10896 | separate_line_info_table_in_use); | |
ac260b05 | 10897 | if (flag_debug_asm) |
2e4b9b8c | 10898 | fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START, |
00a42e21 | 10899 | filename, line); |
e90b62db JM |
10900 | |
10901 | /* expand the line info table if necessary */ | |
10902 | if (separate_line_info_table_in_use | |
10903 | == separate_line_info_table_allocated) | |
10904 | { | |
10905 | separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
10906 | separate_line_info_table | |
71dfc51f RK |
10907 | = (dw_separate_line_info_ref) |
10908 | xrealloc (separate_line_info_table, | |
10909 | separate_line_info_table_allocated | |
10910 | * sizeof (dw_separate_line_info_entry)); | |
e90b62db | 10911 | } |
71dfc51f RK |
10912 | |
10913 | /* Add the new entry at the end of the line_info_table. */ | |
e90b62db JM |
10914 | line_info |
10915 | = &separate_line_info_table[separate_line_info_table_in_use++]; | |
2e18bbae | 10916 | line_info->dw_file_num = lookup_filename (&line_file_table, filename); |
e90b62db JM |
10917 | line_info->dw_line_num = line; |
10918 | line_info->function = current_funcdef_number; | |
10919 | } | |
10920 | else | |
10921 | { | |
10922 | register dw_line_info_ref line_info; | |
71dfc51f | 10923 | |
5c90448c JM |
10924 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL, |
10925 | line_info_table_in_use); | |
ac260b05 | 10926 | if (flag_debug_asm) |
2e4b9b8c | 10927 | fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START, |
00a42e21 | 10928 | filename, line); |
e90b62db | 10929 | |
71dfc51f | 10930 | /* Expand the line info table if necessary. */ |
e90b62db JM |
10931 | if (line_info_table_in_use == line_info_table_allocated) |
10932 | { | |
10933 | line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
10934 | line_info_table | |
71dfc51f RK |
10935 | = (dw_line_info_ref) |
10936 | xrealloc (line_info_table, | |
10937 | (line_info_table_allocated | |
10938 | * sizeof (dw_line_info_entry))); | |
e90b62db | 10939 | } |
71dfc51f RK |
10940 | |
10941 | /* Add the new entry at the end of the line_info_table. */ | |
e90b62db | 10942 | line_info = &line_info_table[line_info_table_in_use++]; |
2e18bbae | 10943 | line_info->dw_file_num = lookup_filename (&line_file_table, filename); |
e90b62db | 10944 | line_info->dw_line_num = line; |
a3f97cbb | 10945 | } |
a3f97cbb JW |
10946 | } |
10947 | } | |
10948 | ||
10949 | /* Record the beginning of a new source file, for later output | |
10950 | of the .debug_macinfo section. At present, unimplemented. */ | |
71dfc51f | 10951 | |
a3f97cbb | 10952 | void |
9a666dda | 10953 | dwarf2out_start_source_file (filename) |
d560ee52 | 10954 | register const char *filename ATTRIBUTE_UNUSED; |
a3f97cbb | 10955 | { |
881c6935 JM |
10956 | if (flag_eliminate_dwarf2_dups) |
10957 | { | |
10958 | /* Record the beginning of the file for break_out_includes. */ | |
10959 | dw_die_ref bincl_die = new_die (DW_TAG_GNU_BINCL, comp_unit_die); | |
10960 | add_AT_string (bincl_die, DW_AT_name, filename); | |
10961 | } | |
a3f97cbb JW |
10962 | } |
10963 | ||
9a666dda | 10964 | /* Record the end of a source file, for later output |
a3f97cbb | 10965 | of the .debug_macinfo section. At present, unimplemented. */ |
71dfc51f | 10966 | |
a3f97cbb | 10967 | void |
9a666dda | 10968 | dwarf2out_end_source_file () |
a3f97cbb | 10969 | { |
881c6935 JM |
10970 | if (flag_eliminate_dwarf2_dups) |
10971 | { | |
10972 | /* Record the end of the file for break_out_includes. */ | |
10973 | new_die (DW_TAG_GNU_EINCL, comp_unit_die); | |
0b34cf1e | 10974 | } |
a3f97cbb JW |
10975 | } |
10976 | ||
10977 | /* Called from check_newline in c-parse.y. The `buffer' parameter contains | |
10978 | the tail part of the directive line, i.e. the part which is past the | |
10979 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
71dfc51f | 10980 | |
a3f97cbb | 10981 | void |
9a666dda | 10982 | dwarf2out_define (lineno, buffer) |
2618f955 | 10983 | register unsigned lineno ATTRIBUTE_UNUSED; |
d560ee52 | 10984 | register const char *buffer ATTRIBUTE_UNUSED; |
a3f97cbb JW |
10985 | { |
10986 | static int initialized = 0; | |
10987 | if (!initialized) | |
10988 | { | |
9a666dda | 10989 | dwarf2out_start_source_file (primary_filename); |
a3f97cbb JW |
10990 | initialized = 1; |
10991 | } | |
10992 | } | |
10993 | ||
10994 | /* Called from check_newline in c-parse.y. The `buffer' parameter contains | |
10995 | the tail part of the directive line, i.e. the part which is past the | |
10996 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
71dfc51f | 10997 | |
a3f97cbb | 10998 | void |
9a666dda | 10999 | dwarf2out_undef (lineno, buffer) |
487a6e06 | 11000 | register unsigned lineno ATTRIBUTE_UNUSED; |
d560ee52 | 11001 | register const char *buffer ATTRIBUTE_UNUSED; |
a3f97cbb JW |
11002 | { |
11003 | } | |
11004 | ||
11005 | /* Set up for Dwarf output at the start of compilation. */ | |
71dfc51f | 11006 | |
a3f97cbb | 11007 | void |
9a666dda | 11008 | dwarf2out_init (asm_out_file, main_input_filename) |
a3f97cbb | 11009 | register FILE *asm_out_file; |
d3e3972c | 11010 | register const char *main_input_filename; |
a3f97cbb | 11011 | { |
a3f97cbb JW |
11012 | /* Remember the name of the primary input file. */ |
11013 | primary_filename = main_input_filename; | |
11014 | ||
2e18bbae RH |
11015 | init_file_table (&decl_file_table); |
11016 | init_file_table (&line_file_table); | |
a3f97cbb | 11017 | |
a3f97cbb JW |
11018 | /* Allocate the initial hunk of the decl_die_table. */ |
11019 | decl_die_table | |
3de90026 | 11020 | = (dw_die_ref *) xcalloc (DECL_DIE_TABLE_INCREMENT, sizeof (dw_die_ref)); |
a3f97cbb JW |
11021 | decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT; |
11022 | decl_die_table_in_use = 0; | |
11023 | ||
11024 | /* Allocate the initial hunk of the decl_scope_table. */ | |
11025 | decl_scope_table | |
777ad4c2 | 11026 | = (tree *) xcalloc (DECL_SCOPE_TABLE_INCREMENT, sizeof (tree)); |
a3f97cbb JW |
11027 | decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT; |
11028 | decl_scope_depth = 0; | |
11029 | ||
11030 | /* Allocate the initial hunk of the abbrev_die_table. */ | |
11031 | abbrev_die_table | |
3de90026 RH |
11032 | = (dw_die_ref *) xcalloc (ABBREV_DIE_TABLE_INCREMENT, |
11033 | sizeof (dw_die_ref)); | |
a3f97cbb | 11034 | abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT; |
71dfc51f | 11035 | /* Zero-th entry is allocated, but unused */ |
a3f97cbb JW |
11036 | abbrev_die_table_in_use = 1; |
11037 | ||
11038 | /* Allocate the initial hunk of the line_info_table. */ | |
11039 | line_info_table | |
3de90026 RH |
11040 | = (dw_line_info_ref) xcalloc (LINE_INFO_TABLE_INCREMENT, |
11041 | sizeof (dw_line_info_entry)); | |
a3f97cbb | 11042 | line_info_table_allocated = LINE_INFO_TABLE_INCREMENT; |
71dfc51f | 11043 | /* Zero-th entry is allocated, but unused */ |
a3f97cbb JW |
11044 | line_info_table_in_use = 1; |
11045 | ||
556273e0 | 11046 | /* Generate the initial DIE for the .debug section. Note that the (string) |
a3f97cbb | 11047 | value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE |
556273e0 | 11048 | will (typically) be a relative pathname and that this pathname should be |
a3f97cbb JW |
11049 | taken as being relative to the directory from which the compiler was |
11050 | invoked when the given (base) source file was compiled. */ | |
a96c67ec | 11051 | comp_unit_die = gen_compile_unit_die (main_input_filename); |
a3f97cbb | 11052 | |
1f8f4a0b MM |
11053 | VARRAY_RTX_INIT (used_rtx_varray, 32, "used_rtx_varray"); |
11054 | ggc_add_rtx_varray_root (&used_rtx_varray, 1); | |
1865dbb5 | 11055 | |
5c90448c | 11056 | ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0); |
8b790721 | 11057 | ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0); |
b366352b MM |
11058 | if (DWARF2_GENERATE_TEXT_SECTION_LABEL) |
11059 | ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0); | |
11060 | else | |
11061 | strcpy (text_section_label, stripattributes (TEXT_SECTION)); | |
556273e0 | 11062 | ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label, |
8b790721 | 11063 | DEBUG_INFO_SECTION_LABEL, 0); |
556273e0 | 11064 | ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label, |
8b790721 JM |
11065 | DEBUG_LINE_SECTION_LABEL, 0); |
11066 | ||
11067 | ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION); | |
11068 | ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label); | |
b366352b | 11069 | if (DWARF2_GENERATE_TEXT_SECTION_LABEL) |
a96c67ec JM |
11070 | { |
11071 | ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION); | |
11072 | ASM_OUTPUT_LABEL (asm_out_file, text_section_label); | |
11073 | } | |
8b790721 JM |
11074 | ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION); |
11075 | ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label); | |
11076 | ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION); | |
11077 | ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label); | |
a3f97cbb JW |
11078 | } |
11079 | ||
11080 | /* Output stuff that dwarf requires at the end of every file, | |
11081 | and generate the DWARF-2 debugging info. */ | |
71dfc51f | 11082 | |
a3f97cbb | 11083 | void |
9a666dda | 11084 | dwarf2out_finish () |
a3f97cbb | 11085 | { |
ef76d03b JW |
11086 | limbo_die_node *node, *next_node; |
11087 | dw_die_ref die; | |
ef76d03b JW |
11088 | |
11089 | /* Traverse the limbo die list, and add parent/child links. The only | |
11090 | dies without parents that should be here are concrete instances of | |
11091 | inline functions, and the comp_unit_die. We can ignore the comp_unit_die. | |
11092 | For concrete instances, we can get the parent die from the abstract | |
11093 | instance. */ | |
11094 | for (node = limbo_die_list; node; node = next_node) | |
11095 | { | |
11096 | next_node = node->next; | |
11097 | die = node->die; | |
11098 | ||
11099 | if (die->die_parent == NULL) | |
11100 | { | |
a96c67ec JM |
11101 | dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin); |
11102 | if (origin) | |
11103 | add_child_die (origin->die_parent, die); | |
ef76d03b | 11104 | else if (die == comp_unit_die) |
a96c67ec | 11105 | ; |
ef76d03b JW |
11106 | else |
11107 | abort (); | |
11108 | } | |
11109 | free (node); | |
11110 | } | |
a96c67ec | 11111 | limbo_die_list = NULL; |
ef76d03b | 11112 | |
8a8c3656 JM |
11113 | /* Walk through the list of incomplete types again, trying once more to |
11114 | emit full debugging info for them. */ | |
11115 | retry_incomplete_types (); | |
11116 | ||
881c6935 JM |
11117 | /* We need to reverse all the dies before break_out_includes, or |
11118 | we'll see the end of an include file before the beginning. */ | |
11119 | reverse_all_dies (comp_unit_die); | |
11120 | ||
11121 | /* Generate separate CUs for each of the include files we've seen. | |
11122 | They will go into limbo_die_list. */ | |
5f632b5e JM |
11123 | if (flag_eliminate_dwarf2_dups) |
11124 | break_out_includes (comp_unit_die); | |
881c6935 JM |
11125 | |
11126 | /* Traverse the DIE's and add add sibling attributes to those DIE's | |
11127 | that have children. */ | |
a3f97cbb | 11128 | add_sibling_attributes (comp_unit_die); |
881c6935 JM |
11129 | for (node = limbo_die_list; node; node = node->next) |
11130 | add_sibling_attributes (node->die); | |
a3f97cbb JW |
11131 | |
11132 | /* Output a terminator label for the .text section. */ | |
a3f97cbb | 11133 | ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION); |
5c90448c | 11134 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0); |
a3f97cbb | 11135 | |
bdb669cb | 11136 | #if 0 |
a3f97cbb | 11137 | /* Output a terminator label for the .data section. */ |
a3f97cbb | 11138 | ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION); |
5c90448c | 11139 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0); |
a3f97cbb JW |
11140 | |
11141 | /* Output a terminator label for the .bss section. */ | |
a3f97cbb | 11142 | ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION); |
5c90448c | 11143 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0); |
bdb669cb | 11144 | #endif |
a3f97cbb | 11145 | |
e90b62db JM |
11146 | /* Output the source line correspondence table. */ |
11147 | if (line_info_table_in_use > 1 || separate_line_info_table_in_use) | |
11148 | { | |
b2244e22 JW |
11149 | if (! DWARF2_ASM_LINE_DEBUG_INFO) |
11150 | { | |
b2244e22 JW |
11151 | ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION); |
11152 | output_line_info (); | |
11153 | } | |
e90b62db JM |
11154 | |
11155 | /* We can only use the low/high_pc attributes if all of the code | |
11156 | was in .text. */ | |
11157 | if (separate_line_info_table_in_use == 0) | |
11158 | { | |
8b790721 | 11159 | add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label); |
5c90448c | 11160 | add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label); |
e90b62db | 11161 | } |
71dfc51f | 11162 | |
8b790721 JM |
11163 | add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list, |
11164 | debug_line_section_label); | |
e90b62db JM |
11165 | } |
11166 | ||
a96c67ec JM |
11167 | #if 0 /* unimplemented */ |
11168 | if (debug_info_level >= DINFO_LEVEL_VERBOSE && primary) | |
11169 | add_AT_unsigned (die, DW_AT_macro_info, 0); | |
11170 | #endif | |
11171 | ||
881c6935 JM |
11172 | /* Output all of the compilation units. We put the main one last so that |
11173 | the offsets are available to output_pubnames. */ | |
11174 | for (node = limbo_die_list; node; node = node->next) | |
11175 | output_comp_unit (node->die); | |
11176 | output_comp_unit (comp_unit_die); | |
11177 | ||
a3f97cbb | 11178 | /* Output the abbreviation table. */ |
a3f97cbb | 11179 | ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION); |
a3f97cbb JW |
11180 | output_abbrev_section (); |
11181 | ||
d291dd49 JM |
11182 | if (pubname_table_in_use) |
11183 | { | |
11184 | /* Output public names table. */ | |
d291dd49 JM |
11185 | ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION); |
11186 | output_pubnames (); | |
11187 | } | |
11188 | ||
e689ae67 JM |
11189 | /* We only put functions in the arange table, so don't write it out if |
11190 | we don't have any. */ | |
a3f97cbb JW |
11191 | if (fde_table_in_use) |
11192 | { | |
a3f97cbb | 11193 | /* Output the address range information. */ |
a3f97cbb JW |
11194 | ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION); |
11195 | output_aranges (); | |
11196 | } | |
11197 | } | |
9a666dda | 11198 | #endif /* DWARF2_DEBUGGING_INFO */ |