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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
d87bef3a | 2 | Copyright (C) 1999-2023 Free Software Foundation, Inc. |
fac0d250 RH |
3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
fac0d250 RH |
10 | any later version. |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
fac0d250 | 21 | |
89b66cde | 22 | /* Logical line numbers can be controlled by the compiler via the |
bd0eb99b | 23 | following directives: |
fac0d250 RH |
24 | |
25 | .file FILENO "file.c" | |
ecea7679 | 26 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
92846e72 | 27 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] \ |
4a075b25 | 28 | [discriminator VALUE] [view VALUE] |
bd0eb99b | 29 | */ |
fac0d250 | 30 | |
fac0d250 | 31 | #include "as.h" |
bd0eb99b | 32 | #include "safe-ctype.h" |
42dbf88c | 33 | #include <limits.h> |
70658493 | 34 | #include "dwarf2dbg.h" |
a7ed1ca2 | 35 | #include <filenames.h> |
70658493 | 36 | |
56487c55 NC |
37 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
38 | /* We need to decide which character to use as a directory separator. | |
39 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
40 | necessarily mean that the backslash character is the one to use. | |
41 | Some environments, eg Cygwin, can support both naming conventions. | |
42 | So we use the heuristic that we only need to use the backslash if | |
43 | the path is an absolute path starting with a DOS style drive | |
44 | selector. eg C: or D: */ | |
45 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
46 | do \ | |
47 | { \ | |
48 | if (offset > 1 \ | |
7fd3924a AM |
49 | && string[0] != 0 \ |
50 | && string[1] == ':') \ | |
56487c55 NC |
51 | string [offset] = '\\'; \ |
52 | else \ | |
53 | string [offset] = '/'; \ | |
54 | } \ | |
55 | while (0) | |
56 | #else | |
57 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
58 | #endif | |
59 | ||
14e777e0 | 60 | #ifndef DWARF2_FORMAT |
413a266c | 61 | # define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
14e777e0 KB |
62 | #endif |
63 | ||
9605f328 | 64 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 65 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
66 | #endif |
67 | ||
01e1a5bc NC |
68 | #ifndef DWARF2_FILE_NAME |
69 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
70 | #endif | |
71 | ||
72 | #ifndef DWARF2_FILE_TIME_NAME | |
5496f3c6 | 73 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
74 | #endif |
75 | ||
76 | #ifndef DWARF2_FILE_SIZE_NAME | |
5496f3c6 | 77 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
78 | #endif |
79 | ||
fc0eebac | 80 | #ifndef DWARF2_VERSION |
31bf1864 | 81 | #define DWARF2_VERSION dwarf_level |
fc0eebac TG |
82 | #endif |
83 | ||
88ebb0a1 MW |
84 | /* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */ |
85 | #ifndef DWARF2_ARANGES_VERSION | |
86 | #define DWARF2_ARANGES_VERSION 2 | |
87 | #endif | |
88 | ||
6cb7f6d9 | 89 | /* The .debug_line version is the same as the .debug_info version. */ |
88ebb0a1 | 90 | #ifndef DWARF2_LINE_VERSION |
6cb7f6d9 | 91 | #define DWARF2_LINE_VERSION DWARF2_VERSION |
88ebb0a1 MW |
92 | #endif |
93 | ||
bdd3b953 MW |
94 | /* The .debug_rnglists has only been in DWARF version 5. */ |
95 | #ifndef DWARF2_RNGLISTS_VERSION | |
96 | #define DWARF2_RNGLISTS_VERSION 5 | |
97 | #endif | |
98 | ||
fac0d250 RH |
99 | #include "subsegs.h" |
100 | ||
fa8f86ff | 101 | #include "dwarf2.h" |
fac0d250 | 102 | |
fac0d250 RH |
103 | /* Since we can't generate the prolog until the body is complete, we |
104 | use three different subsegments for .debug_line: one holding the | |
105 | prolog, one for the directory and filename info, and one for the | |
106 | body ("statement program"). */ | |
107 | #define DL_PROLOG 0 | |
108 | #define DL_FILES 1 | |
109 | #define DL_BODY 2 | |
110 | ||
1737851b BW |
111 | /* If linker relaxation might change offsets in the code, the DWARF special |
112 | opcodes and variable-length operands cannot be used. If this macro is | |
113 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
114 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
453dc3f0 | 115 | # define DWARF2_USE_FIXED_ADVANCE_PC linkrelax |
1737851b BW |
116 | #endif |
117 | ||
33eaf5de | 118 | /* First special line opcode - leave room for the standard opcodes. |
fac0d250 RH |
119 | Note: If you want to change this, you'll have to update the |
120 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b | 121 | out_debug_line(). */ |
6cb7f6d9 | 122 | #define DWARF2_LINE_OPCODE_BASE (DWARF2_LINE_VERSION == 2 ? 10 : 13) |
fac0d250 RH |
123 | |
124 | #ifndef DWARF2_LINE_BASE | |
125 | /* Minimum line offset in a special line info. opcode. This value | |
126 | was chosen to give a reasonable range of values. */ | |
127 | # define DWARF2_LINE_BASE -5 | |
128 | #endif | |
129 | ||
130 | /* Range of line offsets in a special line info. opcode. */ | |
131 | #ifndef DWARF2_LINE_RANGE | |
132 | # define DWARF2_LINE_RANGE 14 | |
133 | #endif | |
134 | ||
135 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
136 | /* Define the architecture-dependent minimum instruction length (in | |
137 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 138 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
139 | #endif |
140 | ||
bd0eb99b | 141 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
142 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
143 | ||
5496f3c6 NC |
144 | #ifndef DWARF2_LINE_MAX_OPS_PER_INSN |
145 | #define DWARF2_LINE_MAX_OPS_PER_INSN 1 | |
146 | #endif | |
147 | ||
cb30237e | 148 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
149 | #define SPECIAL_LINE(op) \ |
150 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
151 | ||
152 | /* Given a special op, return the address skip amount (in units of | |
153 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
154 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
155 | ||
cb30237e | 156 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
157 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
158 | ||
62ebcb5c AM |
159 | #ifndef TC_PARSE_CONS_RETURN_NONE |
160 | #define TC_PARSE_CONS_RETURN_NONE BFD_RELOC_NONE | |
161 | #endif | |
162 | ||
5578fbf6 NC |
163 | #define GAS_ABBREV_COMP_UNIT 1 |
164 | #define GAS_ABBREV_SUBPROG 2 | |
165 | #define GAS_ABBREV_NO_TYPE 3 | |
166 | ||
ba8826a8 AO |
167 | struct line_entry |
168 | { | |
220e750f | 169 | struct line_entry *next; |
07a53e5c | 170 | symbolS *label; |
220e750f | 171 | struct dwarf2_line_info loc; |
e6c774b4 | 172 | }; |
fac0d250 | 173 | |
ba8826a8 AO |
174 | /* Don't change the offset of next in line_entry. set_or_check_view |
175 | calls in dwarf2_gen_line_info_1 depend on it. */ | |
176 | static char unused[offsetof(struct line_entry, next) ? -1 : 1] | |
177 | ATTRIBUTE_UNUSED; | |
178 | ||
179 | struct line_subseg | |
180 | { | |
220e750f RH |
181 | struct line_subseg *next; |
182 | subsegT subseg; | |
183 | struct line_entry *head; | |
184 | struct line_entry **ptail; | |
e410add4 | 185 | struct line_entry **pmove_tail; |
220e750f | 186 | }; |
353e2c69 | 187 | |
ba8826a8 AO |
188 | struct line_seg |
189 | { | |
220e750f RH |
190 | struct line_seg *next; |
191 | segT seg; | |
192 | struct line_subseg *head; | |
193 | symbolS *text_start; | |
194 | symbolS *text_end; | |
195 | }; | |
196 | ||
197 | /* Collects data for all line table entries during assembly. */ | |
198 | static struct line_seg *all_segs; | |
1e9cc1c2 | 199 | static struct line_seg **last_seg_ptr; |
220e750f | 200 | |
5496f3c6 NC |
201 | #define NUM_MD5_BYTES 16 |
202 | ||
ba8826a8 AO |
203 | struct file_entry |
204 | { | |
5496f3c6 NC |
205 | const char * filename; |
206 | unsigned int dir; | |
207 | unsigned char md5[NUM_MD5_BYTES]; | |
220e750f RH |
208 | }; |
209 | ||
210 | /* Table of files used by .debug_line. */ | |
211 | static struct file_entry *files; | |
212 | static unsigned int files_in_use; | |
213 | static unsigned int files_allocated; | |
214 | ||
a7ed1ca2 | 215 | /* Table of directories used by .debug_line. */ |
82cb2524 AM |
216 | static char ** dirs; |
217 | static unsigned int dirs_in_use; | |
218 | static unsigned int dirs_allocated; | |
a7ed1ca2 | 219 | |
b34976b6 | 220 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
edc7a80a MW |
221 | doing work when there's nothing to do. Will be reset by |
222 | dwarf2_consume_line_info. */ | |
5b7c81bd | 223 | bool dwarf2_loc_directive_seen; |
220e750f | 224 | |
edc7a80a MW |
225 | /* TRUE when we've seen any .loc directive at any time during parsing. |
226 | Indicates the user wants us to generate a .debug_line section. | |
227 | Used in dwarf2_finish as sanity check. */ | |
5b7c81bd | 228 | static bool dwarf2_any_loc_directive_seen; |
edc7a80a | 229 | |
07a53e5c RH |
230 | /* TRUE when we're supposed to set the basic block mark whenever a |
231 | label is seen. */ | |
5b7c81bd | 232 | bool dwarf2_loc_mark_labels; |
07a53e5c | 233 | |
220e750f | 234 | /* Current location as indicated by the most recent .loc directive. */ |
82cb2524 | 235 | static struct dwarf2_line_info current; |
220e750f | 236 | |
ba8826a8 AO |
237 | /* This symbol is used to recognize view number forced resets in loc |
238 | lists. */ | |
239 | static symbolS *force_reset_view; | |
240 | ||
241 | /* This symbol evaluates to an expression that, if nonzero, indicates | |
242 | some view assert check failed. */ | |
243 | static symbolS *view_assert_failed; | |
244 | ||
220e750f RH |
245 | /* The size of an address on the target. */ |
246 | static unsigned int sizeof_address; | |
247 | \f | |
c5c0a210 | 248 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 249 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 250 | |
6174d9c8 RH |
251 | /* Create an offset to .dwarf2_*. */ |
252 | ||
253 | static void | |
a2e22468 | 254 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 255 | { |
91d6fa6a | 256 | expressionS exp; |
6174d9c8 | 257 | |
031e3350 | 258 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
259 | exp.X_op = O_symbol; |
260 | exp.X_add_symbol = symbol; | |
261 | exp.X_add_number = 0; | |
262 | emit_expr (&exp, size); | |
6174d9c8 | 263 | } |
c5c0a210 | 264 | #endif |
6174d9c8 | 265 | |
e410add4 | 266 | /* Find or create (if CREATE_P) an entry for SEG+SUBSEG in ALL_SEGS. */ |
220e750f RH |
267 | |
268 | static struct line_subseg * | |
5b7c81bd | 269 | get_line_subseg (segT seg, subsegT subseg, bool create_p) |
220e750f | 270 | { |
5f3fd8b4 | 271 | struct line_seg *s = seg_info (seg)->dwarf2_line_seg; |
91d6fa6a | 272 | struct line_subseg **pss, *lss; |
fac0d250 | 273 | |
1e9cc1c2 NC |
274 | if (s == NULL) |
275 | { | |
e410add4 RS |
276 | if (!create_p) |
277 | return NULL; | |
278 | ||
325801bd | 279 | s = XNEW (struct line_seg); |
1e9cc1c2 NC |
280 | s->next = NULL; |
281 | s->seg = seg; | |
282 | s->head = NULL; | |
283 | *last_seg_ptr = s; | |
284 | last_seg_ptr = &s->next; | |
5f3fd8b4 | 285 | seg_info (seg)->dwarf2_line_seg = s; |
1e9cc1c2 | 286 | } |
5496f3c6 | 287 | |
1e9cc1c2 | 288 | gas_assert (seg == s->seg); |
220e750f | 289 | |
91d6fa6a | 290 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 291 | { |
91d6fa6a | 292 | if (lss->subseg == subseg) |
ee515fb7 | 293 | goto found_subseg; |
91d6fa6a | 294 | if (lss->subseg > subseg) |
220e750f | 295 | break; |
fac0d250 | 296 | } |
220e750f | 297 | |
325801bd | 298 | lss = XNEW (struct line_subseg); |
91d6fa6a NC |
299 | lss->next = *pss; |
300 | lss->subseg = subseg; | |
301 | lss->head = NULL; | |
302 | lss->ptail = &lss->head; | |
e410add4 | 303 | lss->pmove_tail = &lss->head; |
91d6fa6a | 304 | *pss = lss; |
220e750f RH |
305 | |
306 | found_subseg: | |
91d6fa6a | 307 | return lss; |
fac0d250 RH |
308 | } |
309 | ||
ba8826a8 AO |
310 | /* (Un)reverse the line_entry list starting from H. */ |
311 | ||
312 | static struct line_entry * | |
313 | reverse_line_entry_list (struct line_entry *h) | |
314 | { | |
315 | struct line_entry *p = NULL, *e, *n; | |
316 | ||
317 | for (e = h; e; e = n) | |
318 | { | |
319 | n = e->next; | |
320 | e->next = p; | |
321 | p = e; | |
322 | } | |
323 | return p; | |
324 | } | |
325 | ||
326 | /* Compute the view for E based on the previous entry P. If we | |
327 | introduce an (undefined) view symbol for P, and H is given (P must | |
328 | be the tail in this case), introduce view symbols for earlier list | |
329 | entries as well, until one of them is constant. */ | |
330 | ||
331 | static void | |
332 | set_or_check_view (struct line_entry *e, struct line_entry *p, | |
333 | struct line_entry *h) | |
334 | { | |
335 | expressionS viewx; | |
336 | ||
337 | memset (&viewx, 0, sizeof (viewx)); | |
338 | viewx.X_unsigned = 1; | |
339 | ||
340 | /* First, compute !(E->label > P->label), to tell whether or not | |
341 | we're to reset the view number. If we can't resolve it to a | |
342 | constant, keep it symbolic. */ | |
51298b33 | 343 | if (!p || (e->loc.u.view == force_reset_view && force_reset_view)) |
ba8826a8 AO |
344 | { |
345 | viewx.X_op = O_constant; | |
346 | viewx.X_add_number = 0; | |
347 | viewx.X_add_symbol = NULL; | |
348 | viewx.X_op_symbol = NULL; | |
349 | } | |
350 | else | |
351 | { | |
352 | viewx.X_op = O_gt; | |
353 | viewx.X_add_number = 0; | |
354 | viewx.X_add_symbol = e->label; | |
355 | viewx.X_op_symbol = p->label; | |
356 | resolve_expression (&viewx); | |
357 | if (viewx.X_op == O_constant) | |
358 | viewx.X_add_number = !viewx.X_add_number; | |
359 | else | |
360 | { | |
361 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
362 | viewx.X_add_number = 0; | |
363 | viewx.X_op_symbol = NULL; | |
364 | viewx.X_op = O_logical_not; | |
365 | } | |
366 | } | |
367 | ||
51298b33 | 368 | if (S_IS_DEFINED (e->loc.u.view) && symbol_constant_p (e->loc.u.view)) |
ba8826a8 | 369 | { |
51298b33 | 370 | expressionS *value = symbol_get_value_expression (e->loc.u.view); |
ba8826a8 AO |
371 | /* We can't compare the view numbers at this point, because in |
372 | VIEWX we've only determined whether we're to reset it so | |
373 | far. */ | |
374 | if (viewx.X_op == O_constant) | |
375 | { | |
376 | if (!value->X_add_number != !viewx.X_add_number) | |
377 | as_bad (_("view number mismatch")); | |
378 | } | |
379 | /* Record the expression to check it later. It is the result of | |
380 | a logical not, thus 0 or 1. We just add up all such deferred | |
381 | expressions, and resolve it at the end. */ | |
382 | else if (!value->X_add_number) | |
383 | { | |
384 | symbolS *deferred = make_expr_symbol (&viewx); | |
385 | if (view_assert_failed) | |
386 | { | |
387 | expressionS chk; | |
031e3350 | 388 | |
ba8826a8 AO |
389 | memset (&chk, 0, sizeof (chk)); |
390 | chk.X_unsigned = 1; | |
391 | chk.X_op = O_add; | |
392 | chk.X_add_number = 0; | |
393 | chk.X_add_symbol = view_assert_failed; | |
394 | chk.X_op_symbol = deferred; | |
395 | deferred = make_expr_symbol (&chk); | |
396 | } | |
397 | view_assert_failed = deferred; | |
398 | } | |
399 | } | |
400 | ||
401 | if (viewx.X_op != O_constant || viewx.X_add_number) | |
402 | { | |
403 | expressionS incv; | |
fb0e49d8 | 404 | expressionS *p_view; |
ba8826a8 | 405 | |
51298b33 | 406 | if (!p->loc.u.view) |
fb0e49d8 | 407 | p->loc.u.view = symbol_temp_make (); |
ba8826a8 AO |
408 | |
409 | memset (&incv, 0, sizeof (incv)); | |
410 | incv.X_unsigned = 1; | |
411 | incv.X_op = O_symbol; | |
51298b33 | 412 | incv.X_add_symbol = p->loc.u.view; |
ba8826a8 | 413 | incv.X_add_number = 1; |
fb0e49d8 AM |
414 | p_view = symbol_get_value_expression (p->loc.u.view); |
415 | if (p_view->X_op == O_constant || p_view->X_op == O_symbol) | |
416 | { | |
417 | /* If we can, constant fold increments so that a chain of | |
418 | expressions v + 1 + 1 ... + 1 is not created. | |
419 | resolve_expression isn't ideal for this purpose. The | |
420 | base v might not be resolvable until later. */ | |
421 | incv.X_op = p_view->X_op; | |
422 | incv.X_add_symbol = p_view->X_add_symbol; | |
423 | incv.X_add_number = p_view->X_add_number + 1; | |
424 | } | |
ba8826a8 AO |
425 | |
426 | if (viewx.X_op == O_constant) | |
427 | { | |
428 | gas_assert (viewx.X_add_number == 1); | |
429 | viewx = incv; | |
430 | } | |
431 | else | |
432 | { | |
433 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
434 | viewx.X_add_number = 0; | |
435 | viewx.X_op_symbol = make_expr_symbol (&incv); | |
436 | viewx.X_op = O_multiply; | |
437 | } | |
438 | } | |
439 | ||
51298b33 | 440 | if (!S_IS_DEFINED (e->loc.u.view)) |
ba8826a8 | 441 | { |
51298b33 AM |
442 | symbol_set_value_expression (e->loc.u.view, &viewx); |
443 | S_SET_SEGMENT (e->loc.u.view, expr_section); | |
444 | symbol_set_frag (e->loc.u.view, &zero_address_frag); | |
ba8826a8 AO |
445 | } |
446 | ||
447 | /* Define and attempt to simplify any earlier views needed to | |
448 | compute E's. */ | |
51298b33 | 449 | if (h && p && p->loc.u.view && !S_IS_DEFINED (p->loc.u.view)) |
ba8826a8 AO |
450 | { |
451 | struct line_entry *h2; | |
452 | /* Reverse the list to avoid quadratic behavior going backwards | |
453 | in a single-linked list. */ | |
454 | struct line_entry *r = reverse_line_entry_list (h); | |
455 | ||
456 | gas_assert (r == p); | |
457 | /* Set or check views until we find a defined or absent view. */ | |
458 | do | |
62e6b7b3 AO |
459 | { |
460 | /* Do not define the head of a (sub?)segment view while | |
461 | handling others. It would be defined too early, without | |
462 | regard to the last view of other subsegments. | |
463 | set_or_check_view will be called for every head segment | |
464 | that needs it. */ | |
465 | if (r == h) | |
466 | break; | |
467 | set_or_check_view (r, r->next, NULL); | |
468 | } | |
51298b33 AM |
469 | while (r->next |
470 | && r->next->loc.u.view | |
471 | && !S_IS_DEFINED (r->next->loc.u.view) | |
ba8826a8 AO |
472 | && (r = r->next)); |
473 | ||
474 | /* Unreverse the list, so that we can go forward again. */ | |
475 | h2 = reverse_line_entry_list (p); | |
476 | gas_assert (h2 == h); | |
477 | ||
478 | /* Starting from the last view we just defined, attempt to | |
479 | simplify the view expressions, until we do so to P. */ | |
480 | do | |
481 | { | |
62e6b7b3 AO |
482 | /* The head view of a subsegment may remain undefined while |
483 | handling other elements, before it is linked to the last | |
484 | view of the previous subsegment. */ | |
485 | if (r == h) | |
486 | continue; | |
51298b33 AM |
487 | gas_assert (S_IS_DEFINED (r->loc.u.view)); |
488 | resolve_expression (symbol_get_value_expression (r->loc.u.view)); | |
ba8826a8 AO |
489 | } |
490 | while (r != p && (r = r->next)); | |
491 | ||
492 | /* Now that we've defined and computed all earlier views that might | |
493 | be needed to compute E's, attempt to simplify it. */ | |
51298b33 | 494 | resolve_expression (symbol_get_value_expression (e->loc.u.view)); |
ba8826a8 AO |
495 | } |
496 | } | |
497 | ||
6a50d470 | 498 | /* Record an entry for LOC occurring at LABEL. */ |
07a53e5c RH |
499 | |
500 | static void | |
6a50d470 | 501 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) |
07a53e5c | 502 | { |
6a50d470 | 503 | struct line_subseg *lss; |
07a53e5c | 504 | struct line_entry *e; |
058430b4 | 505 | flagword need_flags = SEC_LOAD | SEC_CODE; |
bcb78b47 | 506 | |
058430b4 AM |
507 | /* PR 26850: Do not record LOCs in non-executable or non-loaded |
508 | sections. SEC_ALLOC isn't tested for non-ELF because obj-coff.c | |
509 | obj_coff_section is careless in setting SEC_ALLOC. */ | |
510 | if (IS_ELF) | |
511 | need_flags |= SEC_ALLOC; | |
bcb78b47 NC |
512 | if ((now_seg->flags & need_flags) != need_flags) |
513 | { | |
058430b4 | 514 | /* FIXME: Add code to suppress multiple warnings ? */ |
be07043e AM |
515 | if (debug_type != DEBUG_DWARF2) |
516 | as_warn ("dwarf line number information for %s ignored", | |
517 | segment_name (now_seg)); | |
bcb78b47 NC |
518 | return; |
519 | } | |
07a53e5c | 520 | |
325801bd | 521 | e = XNEW (struct line_entry); |
07a53e5c | 522 | e->next = NULL; |
6a50d470 | 523 | e->label = label; |
07a53e5c RH |
524 | e->loc = *loc; |
525 | ||
5b7c81bd | 526 | lss = get_line_subseg (now_seg, now_subseg, true); |
ba8826a8 | 527 | |
62e6b7b3 AO |
528 | /* Subseg heads are chained to previous subsegs in |
529 | dwarf2_finish. */ | |
51298b33 AM |
530 | if (loc->filenum != -1u && loc->u.view && lss->head) |
531 | set_or_check_view (e, (struct line_entry *) lss->ptail, lss->head); | |
ba8826a8 | 532 | |
6a50d470 RS |
533 | *lss->ptail = e; |
534 | lss->ptail = &e->next; | |
07a53e5c RH |
535 | } |
536 | ||
436d9e46 | 537 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 538 | |
a2aee680 AM |
539 | static unsigned int dw2_line; |
540 | static const char *dw2_filename; | |
541 | static int label_num; | |
542 | ||
220e750f | 543 | void |
a2e22468 | 544 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 545 | { |
6a50d470 RS |
546 | symbolS *sym; |
547 | ||
220e750f | 548 | /* Early out for as-yet incomplete location information. */ |
5496f3c6 NC |
549 | if (loc->line == 0) |
550 | return; | |
498ff032 | 551 | if (loc->filenum == 0) |
705989f1 | 552 | { |
498ff032 AM |
553 | if (dwarf_level < 5) |
554 | dwarf_level = 5; | |
705989f1 L |
555 | if (DWARF2_LINE_VERSION < 5) |
556 | return; | |
557 | } | |
220e750f | 558 | |
ffa554ed GK |
559 | /* Don't emit sequences of line symbols for the same line when the |
560 | symbols apply to assembler code. It is necessary to emit | |
561 | duplicate line symbols when a compiler asks for them, because GDB | |
562 | uses them to determine the end of the prologue. */ | |
51298b33 AM |
563 | if (debug_type == DEBUG_DWARF2) |
564 | { | |
a2aee680 | 565 | if (dw2_line == loc->line) |
51298b33 | 566 | { |
a2aee680 | 567 | if (dw2_filename == loc->u.filename) |
51298b33 | 568 | return; |
a2aee680 | 569 | if (filename_cmp (dw2_filename, loc->u.filename) == 0) |
51298b33 | 570 | { |
a2aee680 | 571 | dw2_filename = loc->u.filename; |
51298b33 AM |
572 | return; |
573 | } | |
574 | } | |
1ea5c325 | 575 | |
a2aee680 AM |
576 | dw2_line = loc->line; |
577 | dw2_filename = loc->u.filename; | |
51298b33 | 578 | } |
1ea5c325 | 579 | |
453dc3f0 NC |
580 | if (linkrelax) |
581 | { | |
51298b33 | 582 | char name[32]; |
453dc3f0 NC |
583 | |
584 | /* Use a non-fake name for the line number location, | |
585 | so that it can be referred to by relocations. */ | |
51298b33 AM |
586 | sprintf (name, ".Loc.%u", label_num); |
587 | label_num++; | |
e01e1cee | 588 | sym = symbol_new (name, now_seg, frag_now, ofs); |
453dc3f0 NC |
589 | } |
590 | else | |
e01e1cee | 591 | sym = symbol_temp_new (now_seg, frag_now, ofs); |
6a50d470 | 592 | dwarf2_gen_line_info_1 (sym, loc); |
220e750f | 593 | } |
fac0d250 | 594 | |
5496f3c6 NC |
595 | static const char * |
596 | get_basename (const char * pathname) | |
597 | { | |
598 | const char * file; | |
599 | ||
600 | file = lbasename (pathname); | |
601 | /* Don't make empty string from / or A: from A:/ . */ | |
602 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
603 | if (file <= pathname + 3) | |
604 | file = pathname; | |
605 | #else | |
606 | if (file == pathname + 1) | |
607 | file = pathname; | |
608 | #endif | |
609 | return file; | |
610 | } | |
611 | ||
612 | static unsigned int | |
5b7c81bd | 613 | get_directory_table_entry (const char *dirname, |
58f3b6a3 | 614 | const char *file0_dirname, |
5b7c81bd AM |
615 | size_t dirlen, |
616 | bool can_use_zero) | |
5496f3c6 NC |
617 | { |
618 | unsigned int d; | |
619 | ||
620 | if (dirlen == 0) | |
621 | return 0; | |
622 | ||
623 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR | |
624 | if (IS_DIR_SEPARATOR (dirname[dirlen - 1])) | |
625 | { | |
626 | -- dirlen; | |
627 | if (dirlen == 0) | |
628 | return 0; | |
629 | } | |
630 | #endif | |
631 | ||
632 | for (d = 0; d < dirs_in_use; ++d) | |
633 | { | |
634 | if (dirs[d] != NULL | |
635 | && filename_ncmp (dirname, dirs[d], dirlen) == 0 | |
636 | && dirs[d][dirlen] == '\0') | |
637 | return d; | |
638 | } | |
639 | ||
640 | if (can_use_zero) | |
641 | { | |
642 | if (dirs == NULL || dirs[0] == NULL) | |
3417bfca | 643 | { |
58f3b6a3 | 644 | const char * pwd = file0_dirname ? file0_dirname : getpwd (); |
3417bfca | 645 | |
51298b33 | 646 | if (dwarf_level >= 5 && filename_cmp (dirname, pwd) != 0) |
3417bfca | 647 | { |
51298b33 AM |
648 | /* In DWARF-5 the 0 entry in the directory table is |
649 | expected to be the same as the DW_AT_comp_dir (which | |
650 | is set to the current build directory). Since we are | |
651 | about to create a directory entry that is not the | |
f9402cca EB |
652 | same, allocate the current directory first. */ |
653 | (void) get_directory_table_entry (pwd, file0_dirname, | |
654 | strlen (pwd), true); | |
3417bfca NC |
655 | d = 1; |
656 | } | |
657 | else | |
658 | d = 0; | |
659 | } | |
5496f3c6 NC |
660 | } |
661 | else if (d == 0) | |
662 | d = 1; | |
663 | ||
664 | if (d >= dirs_allocated) | |
665 | { | |
666 | unsigned int old = dirs_allocated; | |
3417bfca NC |
667 | #define DIR_TABLE_INCREMENT 32 |
668 | dirs_allocated = d + DIR_TABLE_INCREMENT; | |
5496f3c6 NC |
669 | dirs = XRESIZEVEC (char *, dirs, dirs_allocated); |
670 | memset (dirs + old, 0, (dirs_allocated - old) * sizeof (char *)); | |
671 | } | |
672 | ||
673 | dirs[d] = xmemdup0 (dirname, dirlen); | |
674 | if (dirs_in_use <= d) | |
675 | dirs_in_use = d + 1; | |
676 | ||
677 | return d; | |
678 | } | |
679 | ||
5b7c81bd | 680 | static bool |
6f87d3fd | 681 | assign_file_to_slot (unsigned int i, const char *file, unsigned int dir) |
714e6c96 NC |
682 | { |
683 | if (i >= files_allocated) | |
684 | { | |
82cb2524 | 685 | unsigned int want = i + 32; |
714e6c96 | 686 | |
714e6c96 | 687 | /* Catch wraparound. */ |
82cb2524 AM |
688 | if (want < files_allocated |
689 | || want < i | |
690 | || want > UINT_MAX / sizeof (struct file_entry)) | |
714e6c96 | 691 | { |
6f87d3fd | 692 | as_bad (_("file number %u is too big"), i); |
5b7c81bd | 693 | return false; |
714e6c96 NC |
694 | } |
695 | ||
82cb2524 AM |
696 | files = XRESIZEVEC (struct file_entry, files, want); |
697 | memset (files + files_allocated, 0, | |
698 | (want - files_allocated) * sizeof (struct file_entry)); | |
699 | files_allocated = want; | |
714e6c96 NC |
700 | } |
701 | ||
702 | files[i].filename = file; | |
703 | files[i].dir = dir; | |
714e6c96 NC |
704 | memset (files[i].md5, 0, NUM_MD5_BYTES); |
705 | ||
706 | if (files_in_use < i + 1) | |
707 | files_in_use = i + 1; | |
708 | ||
5b7c81bd | 709 | return true; |
714e6c96 NC |
710 | } |
711 | ||
5496f3c6 NC |
712 | /* Get a .debug_line file number for PATHNAME. If there is a |
713 | directory component to PATHNAME, then this will be stored | |
714 | in the directory table, if it is not already present. | |
715 | Returns the slot number allocated to that filename or -1 | |
716 | if there was a problem. */ | |
717 | ||
a2aee680 AM |
718 | static int last_used; |
719 | static int last_used_dir_len; | |
720 | ||
5496f3c6 NC |
721 | static signed int |
722 | allocate_filenum (const char * pathname) | |
723 | { | |
5496f3c6 NC |
724 | const char *file; |
725 | size_t dir_len; | |
726 | unsigned int i, dir; | |
727 | ||
728 | /* Short circuit the common case of adding the same pathname | |
729 | as last time. */ | |
730 | if (last_used != -1) | |
731 | { | |
732 | const char * dirname = NULL; | |
733 | ||
734 | if (dirs != NULL) | |
735 | dirname = dirs[files[last_used].dir]; | |
736 | ||
737 | if (dirname == NULL) | |
738 | { | |
739 | if (filename_cmp (pathname, files[last_used].filename) == 0) | |
740 | return last_used; | |
741 | } | |
742 | else | |
743 | { | |
d4673354 AM |
744 | if (filename_ncmp (pathname, dirname, last_used_dir_len - 1) == 0 |
745 | && IS_DIR_SEPARATOR (pathname [last_used_dir_len - 1]) | |
746 | && filename_cmp (pathname + last_used_dir_len, | |
5496f3c6 NC |
747 | files[last_used].filename) == 0) |
748 | return last_used; | |
749 | } | |
750 | } | |
751 | ||
752 | file = get_basename (pathname); | |
753 | dir_len = file - pathname; | |
754 | ||
58f3b6a3 | 755 | dir = get_directory_table_entry (pathname, NULL, dir_len, false); |
5496f3c6 | 756 | |
714e6c96 | 757 | /* Do not use slot-0. That is specifically reserved for use by |
5496f3c6 NC |
758 | the '.file 0 "name"' directive. */ |
759 | for (i = 1; i < files_in_use; ++i) | |
760 | if (files[i].dir == dir | |
761 | && files[i].filename | |
762 | && filename_cmp (file, files[i].filename) == 0) | |
763 | { | |
764 | last_used = i; | |
765 | last_used_dir_len = dir_len; | |
766 | return i; | |
767 | } | |
768 | ||
6915020b | 769 | if (!assign_file_to_slot (i, file, dir)) |
714e6c96 | 770 | return -1; |
5496f3c6 | 771 | |
5496f3c6 NC |
772 | last_used = i; |
773 | last_used_dir_len = dir_len; | |
774 | ||
775 | return i; | |
776 | } | |
777 | ||
51298b33 AM |
778 | /* Run through the list of line entries starting at E, allocating |
779 | file entries for gas generated debug. */ | |
780 | ||
781 | static void | |
782 | do_allocate_filenum (struct line_entry *e) | |
783 | { | |
784 | do | |
785 | { | |
786 | if (e->loc.filenum == -1u) | |
787 | { | |
788 | e->loc.filenum = allocate_filenum (e->loc.u.filename); | |
789 | e->loc.u.view = NULL; | |
790 | } | |
791 | e = e->next; | |
792 | } | |
793 | while (e); | |
794 | } | |
795 | ||
ef9768e3 | 796 | /* Remove any generated line entries. These don't live comfortably |
82cb2524 AM |
797 | with compiler generated line info. If THELOT then remove |
798 | everything, freeing all list entries we have created. */ | |
ef9768e3 AM |
799 | |
800 | static void | |
82cb2524 | 801 | purge_generated_debug (bool thelot) |
ef9768e3 | 802 | { |
82cb2524 | 803 | struct line_seg *s, *nexts; |
ef9768e3 | 804 | |
82cb2524 | 805 | for (s = all_segs; s; s = nexts) |
ef9768e3 | 806 | { |
82cb2524 | 807 | struct line_subseg *lss, *nextlss; |
ef9768e3 | 808 | |
82cb2524 | 809 | for (lss = s->head; lss; lss = nextlss) |
ef9768e3 | 810 | { |
5b484628 AM |
811 | struct line_entry *e, *next; |
812 | ||
813 | for (e = lss->head; e; e = next) | |
814 | { | |
82cb2524 AM |
815 | if (!thelot) |
816 | know (e->loc.filenum == -1u); | |
5b484628 AM |
817 | next = e->next; |
818 | free (e); | |
819 | } | |
ef9768e3 | 820 | |
5b484628 AM |
821 | lss->head = NULL; |
822 | lss->ptail = &lss->head; | |
823 | lss->pmove_tail = &lss->head; | |
82cb2524 AM |
824 | nextlss = lss->next; |
825 | if (thelot) | |
826 | free (lss); | |
827 | } | |
828 | nexts = s->next; | |
829 | if (thelot) | |
830 | { | |
831 | seg_info (s->seg)->dwarf2_line_seg = NULL; | |
832 | free (s); | |
5b484628 | 833 | } |
ef9768e3 AM |
834 | } |
835 | } | |
836 | ||
5496f3c6 NC |
837 | /* Allocate slot NUM in the .debug_line file table to FILENAME. |
838 | If DIRNAME is not NULL or there is a directory component to FILENAME | |
839 | then this will be stored in the directory table, if not already present. | |
840 | if WITH_MD5 is TRUE then there is a md5 value in generic_bignum. | |
841 | Returns TRUE if allocation succeeded, FALSE otherwise. */ | |
842 | ||
5b7c81bd AM |
843 | static bool |
844 | allocate_filename_to_slot (const char *dirname, | |
845 | const char *filename, | |
846 | unsigned int num, | |
847 | bool with_md5) | |
5496f3c6 NC |
848 | { |
849 | const char *file; | |
850 | size_t dirlen; | |
851 | unsigned int i, d; | |
f9402cca | 852 | const char *file0_dirname; |
5496f3c6 NC |
853 | |
854 | /* Short circuit the common case of adding the same pathname | |
855 | as last time. */ | |
856 | if (num < files_allocated && files[num].filename != NULL) | |
857 | { | |
858 | const char * dir = NULL; | |
859 | ||
80b652ef | 860 | if (dirs != NULL) |
5496f3c6 NC |
861 | dir = dirs[files[num].dir]; |
862 | ||
863 | if (with_md5 | |
864 | && memcmp (generic_bignum, files[num].md5, NUM_MD5_BYTES) != 0) | |
865 | goto fail; | |
866 | ||
867 | if (dirname != NULL) | |
868 | { | |
869 | if (dir != NULL && filename_cmp (dir, dirname) != 0) | |
870 | goto fail; | |
871 | ||
872 | if (filename_cmp (filename, files[num].filename) != 0) | |
873 | goto fail; | |
874 | ||
875 | /* If the filenames match, but the directory table entry was | |
876 | empty, then fill it with the provided directory name. */ | |
877 | if (dir == NULL) | |
80b652ef NC |
878 | { |
879 | if (dirs == NULL) | |
880 | { | |
3417bfca | 881 | dirs_allocated = files[num].dir + DIR_TABLE_INCREMENT; |
80b652ef NC |
882 | dirs = XCNEWVEC (char *, dirs_allocated); |
883 | } | |
884 | ||
885 | dirs[files[num].dir] = xmemdup0 (dirname, strlen (dirname)); | |
886 | } | |
5496f3c6 | 887 | |
5b7c81bd | 888 | return true; |
5496f3c6 NC |
889 | } |
890 | else if (dir != NULL) | |
891 | { | |
892 | dirlen = strlen (dir); | |
893 | if (filename_ncmp (filename, dir, dirlen) == 0 | |
894 | && IS_DIR_SEPARATOR (filename [dirlen]) | |
895 | && filename_cmp (filename + dirlen + 1, files[num].filename) == 0) | |
5b7c81bd | 896 | return true; |
5496f3c6 NC |
897 | } |
898 | else /* dir == NULL */ | |
899 | { | |
900 | file = get_basename (filename); | |
901 | if (filename_cmp (file, files[num].filename) == 0) | |
902 | { | |
9a12b194 AM |
903 | /* The filenames match, but the directory table entry is empty. |
904 | Fill it with the provided directory name. */ | |
5496f3c6 | 905 | if (file > filename) |
9a12b194 AM |
906 | { |
907 | if (dirs == NULL) | |
908 | { | |
3417bfca | 909 | dirs_allocated = files[num].dir + DIR_TABLE_INCREMENT; |
9a12b194 AM |
910 | dirs = XCNEWVEC (char *, dirs_allocated); |
911 | } | |
912 | ||
913 | dirs[files[num].dir] = xmemdup0 (filename, file - filename); | |
914 | } | |
5b7c81bd | 915 | return true; |
5496f3c6 NC |
916 | } |
917 | } | |
918 | ||
919 | fail: | |
bd0c565e L |
920 | as_bad (_("file table slot %u is already occupied by a different file (%s%s%s vs %s%s%s)"), |
921 | num, | |
922 | dir == NULL ? "" : dir, | |
923 | dir == NULL ? "" : "/", | |
924 | files[num].filename, | |
925 | dirname == NULL ? "" : dirname, | |
926 | dirname == NULL ? "" : "/", | |
927 | filename); | |
5b7c81bd | 928 | return false; |
5496f3c6 NC |
929 | } |
930 | ||
f9402cca EB |
931 | /* For file .0, the directory name is the current directory and the file |
932 | may be in another directory contained in the file name. */ | |
933 | if (num == 0) | |
5496f3c6 | 934 | { |
f9402cca EB |
935 | file0_dirname = dirname; |
936 | ||
5496f3c6 | 937 | file = get_basename (filename); |
f9402cca EB |
938 | |
939 | if (dirname && file == filename) | |
940 | dirlen = strlen (dirname); | |
941 | else | |
942 | { | |
943 | dirname = filename; | |
944 | dirlen = file - filename; | |
945 | } | |
5496f3c6 NC |
946 | } |
947 | else | |
948 | { | |
f9402cca EB |
949 | file0_dirname = NULL; |
950 | ||
951 | if (dirname == NULL) | |
952 | { | |
953 | dirname = filename; | |
954 | file = get_basename (filename); | |
955 | dirlen = file - filename; | |
956 | } | |
957 | else | |
958 | { | |
959 | dirlen = strlen (dirname); | |
960 | file = filename; | |
961 | } | |
5496f3c6 | 962 | } |
3417bfca | 963 | |
f9402cca | 964 | d = get_directory_table_entry (dirname, file0_dirname, dirlen, num == 0); |
5496f3c6 NC |
965 | i = num; |
966 | ||
6915020b | 967 | if (! assign_file_to_slot (i, file, d)) |
5b7c81bd | 968 | return false; |
5496f3c6 | 969 | |
5496f3c6 NC |
970 | if (with_md5) |
971 | { | |
972 | if (target_big_endian) | |
973 | { | |
974 | /* md5's are stored in litte endian format. */ | |
975 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
976 | unsigned int byte = NUM_MD5_BYTES; | |
977 | unsigned int bignum_index = 0; | |
978 | ||
979 | while (bits_remaining) | |
980 | { | |
981 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
982 | valueT bignum_value = generic_bignum [bignum_index]; | |
983 | bignum_index ++; | |
984 | ||
985 | while (bignum_bits_remaining) | |
986 | { | |
987 | files[i].md5[--byte] = bignum_value & 0xff; | |
988 | bignum_value >>= 8; | |
989 | bignum_bits_remaining -= 8; | |
990 | bits_remaining -= 8; | |
991 | } | |
992 | } | |
993 | } | |
994 | else | |
995 | { | |
996 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
997 | unsigned int byte = 0; | |
998 | unsigned int bignum_index = 0; | |
999 | ||
1000 | while (bits_remaining) | |
1001 | { | |
1002 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
1003 | valueT bignum_value = generic_bignum [bignum_index]; | |
1004 | ||
1005 | bignum_index ++; | |
1006 | ||
1007 | while (bignum_bits_remaining) | |
1008 | { | |
1009 | files[i].md5[byte++] = bignum_value & 0xff; | |
1010 | bignum_value >>= 8; | |
1011 | bignum_bits_remaining -= 8; | |
1012 | bits_remaining -= 8; | |
1013 | } | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | else | |
1018 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
1019 | ||
5b7c81bd | 1020 | return true; |
5496f3c6 NC |
1021 | } |
1022 | ||
ecea7679 RH |
1023 | /* Returns the current source information. If .file directives have |
1024 | been encountered, the info for the corresponding source file is | |
1025 | returned. Otherwise, the info for the assembly source file is | |
1026 | returned. */ | |
1027 | ||
220e750f | 1028 | void |
a2e22468 | 1029 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
1030 | { |
1031 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 1032 | { |
51298b33 AM |
1033 | line->u.filename = as_where (&line->line); |
1034 | line->filenum = -1u; | |
220e750f | 1035 | line->column = 0; |
bd0eb99b | 1036 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 1037 | line->isa = current.isa; |
92846e72 | 1038 | line->discriminator = current.discriminator; |
fac0d250 | 1039 | } |
220e750f RH |
1040 | else |
1041 | *line = current; | |
fac0d250 RH |
1042 | } |
1043 | ||
7fd3924a | 1044 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
1045 | machine of isa changes when assembler debug info is enabled. */ |
1046 | ||
1047 | void | |
1048 | dwarf2_set_isa (unsigned int isa) | |
1049 | { | |
1050 | current.isa = isa; | |
1051 | } | |
1052 | ||
220e750f RH |
1053 | /* Called for each machine instruction, or relatively atomic group of |
1054 | machine instructions (ie built-in macro). The instruction or group | |
1055 | is SIZE bytes in length. If dwarf2 line number generation is called | |
1056 | for, emit a line statement appropriately. */ | |
353e2c69 | 1057 | |
220e750f | 1058 | void |
a2e22468 | 1059 | dwarf2_emit_insn (int size) |
fac0d250 | 1060 | { |
220e750f | 1061 | struct dwarf2_line_info loc; |
fac0d250 | 1062 | |
ba8826a8 AO |
1063 | if (debug_type != DEBUG_DWARF2 |
1064 | ? !dwarf2_loc_directive_seen | |
1065 | : !seen_at_least_1_file ()) | |
220e750f | 1066 | return; |
7fd3924a AM |
1067 | |
1068 | dwarf2_where (&loc); | |
b6675117 | 1069 | |
71250b94 | 1070 | dwarf2_gen_line_info ((frag_now_fix_octets () - size) / OCTETS_PER_BYTE, &loc); |
661ba50f BW |
1071 | dwarf2_consume_line_info (); |
1072 | } | |
1073 | ||
e410add4 RS |
1074 | /* Move all previously-emitted line entries for the current position by |
1075 | DELTA bytes. This function cannot be used to move the same entries | |
1076 | twice. */ | |
1077 | ||
1078 | void | |
1079 | dwarf2_move_insn (int delta) | |
1080 | { | |
1081 | struct line_subseg *lss; | |
1082 | struct line_entry *e; | |
1083 | valueT now; | |
1084 | ||
1085 | if (delta == 0) | |
1086 | return; | |
1087 | ||
5b7c81bd | 1088 | lss = get_line_subseg (now_seg, now_subseg, false); |
e410add4 RS |
1089 | if (!lss) |
1090 | return; | |
1091 | ||
1092 | now = frag_now_fix (); | |
1093 | while ((e = *lss->pmove_tail)) | |
1094 | { | |
1095 | if (S_GET_VALUE (e->label) == now) | |
1096 | S_SET_VALUE (e->label, now + delta); | |
1097 | lss->pmove_tail = &e->next; | |
1098 | } | |
1099 | } | |
1100 | ||
661ba50f BW |
1101 | /* Called after the current line information has been either used with |
1102 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
1103 | This resets the state of the line number information to reflect that | |
1104 | it has been used. */ | |
1105 | ||
1106 | void | |
1107 | dwarf2_consume_line_info (void) | |
1108 | { | |
1109 | /* Unless we generate DWARF2 debugging information for each | |
1110 | assembler line, we only emit one line symbol for one LOC. */ | |
5b7c81bd | 1111 | dwarf2_loc_directive_seen = false; |
bd0eb99b RH |
1112 | |
1113 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
1114 | | DWARF2_FLAG_PROLOGUE_END | |
1115 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 1116 | current.discriminator = 0; |
51298b33 | 1117 | current.u.view = NULL; |
220e750f | 1118 | } |
fac0d250 | 1119 | |
07a53e5c RH |
1120 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
1121 | is enabled, emit a basic block marker. */ | |
1122 | ||
1123 | void | |
1124 | dwarf2_emit_label (symbolS *label) | |
1125 | { | |
1126 | struct dwarf2_line_info loc; | |
1127 | ||
1128 | if (!dwarf2_loc_mark_labels) | |
1129 | return; | |
1130 | if (S_GET_SEGMENT (label) != now_seg) | |
1131 | return; | |
fd361982 | 1132 | if (!(bfd_section_flags (now_seg) & SEC_CODE)) |
07a53e5c | 1133 | return; |
7fd3924a AM |
1134 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
1135 | return; | |
1136 | ||
1137 | dwarf2_where (&loc); | |
07a53e5c RH |
1138 | |
1139 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1140 | ||
6a50d470 | 1141 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 1142 | dwarf2_consume_line_info (); |
07a53e5c RH |
1143 | } |
1144 | ||
ecb4347a | 1145 | /* Handle two forms of .file directive: |
c39e89c3 | 1146 | - Pass .file "source.c" to s_file |
ecb4347a | 1147 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table |
220e750f | 1148 | |
68d20676 | 1149 | If an entry is added to the file table, return a pointer to the filename. */ |
ecb4347a DJ |
1150 | |
1151 | char * | |
68d20676 | 1152 | dwarf2_directive_filename (void) |
220e750f | 1153 | { |
5b7c81bd | 1154 | bool with_md5 = false; |
8f02ae5b | 1155 | valueT num; |
e46d99eb | 1156 | char *filename; |
5496f3c6 | 1157 | const char * dirname = NULL; |
220e750f RH |
1158 | int filename_len; |
1159 | ||
1160 | /* Continue to accept a bare string and pass it off. */ | |
1161 | SKIP_WHITESPACE (); | |
1162 | if (*input_line_pointer == '"') | |
fac0d250 | 1163 | { |
c39e89c3 | 1164 | s_file (0); |
ecb4347a | 1165 | return NULL; |
fac0d250 RH |
1166 | } |
1167 | ||
220e750f | 1168 | num = get_absolute_expression (); |
220e750f | 1169 | |
498ff032 | 1170 | if ((offsetT) num < 1) |
fac0d250 | 1171 | { |
498ff032 AM |
1172 | if (num == 0 && dwarf_level < 5) |
1173 | dwarf_level = 5; | |
1174 | if ((offsetT) num < 0 || DWARF2_LINE_VERSION < 5) | |
705989f1 L |
1175 | { |
1176 | as_bad (_("file number less than one")); | |
1177 | ignore_rest_of_line (); | |
1178 | return NULL; | |
1179 | } | |
fac0d250 RH |
1180 | } |
1181 | ||
5496f3c6 NC |
1182 | /* FIXME: Should we allow ".file <N>\n" as an expression meaning |
1183 | "switch back to the already allocated file <N> as the current | |
1184 | file" ? */ | |
84d9ab33 NC |
1185 | |
1186 | filename = demand_copy_C_string (&filename_len); | |
1187 | if (filename == NULL) | |
1188 | /* demand_copy_C_string will have already generated an error message. */ | |
1189 | return NULL; | |
1190 | ||
5496f3c6 NC |
1191 | /* For DWARF-5 support we also accept: |
1192 | .file <NUM> ["<dir>"] "<file>" [md5 <NUM>] */ | |
1193 | if (DWARF2_LINE_VERSION > 4) | |
1194 | { | |
1195 | SKIP_WHITESPACE (); | |
1196 | if (*input_line_pointer == '"') | |
1197 | { | |
1198 | dirname = filename; | |
1199 | filename = demand_copy_C_string (&filename_len); | |
dd61b2d1 AM |
1200 | if (filename == NULL) |
1201 | return NULL; | |
5496f3c6 NC |
1202 | SKIP_WHITESPACE (); |
1203 | } | |
1204 | ||
d34049e8 | 1205 | if (startswith (input_line_pointer, "md5")) |
5496f3c6 NC |
1206 | { |
1207 | input_line_pointer += 3; | |
1208 | SKIP_WHITESPACE (); | |
1209 | ||
1210 | expressionS exp; | |
1211 | expression_and_evaluate (& exp); | |
1212 | if (exp.X_op != O_big) | |
1213 | as_bad (_("md5 value too small or not a constant")); | |
1214 | else | |
5b7c81bd | 1215 | with_md5 = true; |
5496f3c6 NC |
1216 | } |
1217 | } | |
1218 | ||
84d9ab33 NC |
1219 | demand_empty_rest_of_line (); |
1220 | ||
7cadeb2c AM |
1221 | /* A .file directive implies compiler generated debug information is |
1222 | being supplied. Turn off gas generated debug info. */ | |
ef9768e3 | 1223 | if (debug_type == DEBUG_DWARF2) |
82cb2524 | 1224 | purge_generated_debug (false); |
7cadeb2c AM |
1225 | debug_type = DEBUG_NONE; |
1226 | ||
8f02ae5b AM |
1227 | if (num != (unsigned int) num |
1228 | || num >= (size_t) -1 / sizeof (struct file_entry) - 32) | |
220e750f | 1229 | { |
8f02ae5b | 1230 | as_bad (_("file number %lu is too big"), (unsigned long) num); |
ecb4347a | 1231 | return NULL; |
249e3833 | 1232 | } |
220e750f | 1233 | |
5496f3c6 NC |
1234 | if (! allocate_filename_to_slot (dirname, filename, (unsigned int) num, |
1235 | with_md5)) | |
1236 | return NULL; | |
ecb4347a DJ |
1237 | |
1238 | return filename; | |
fac0d250 RH |
1239 | } |
1240 | ||
68d20676 NC |
1241 | /* Calls dwarf2_directive_filename, but discards its result. |
1242 | Used in pseudo-op tables where the function result is ignored. */ | |
1243 | ||
1244 | void | |
1245 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) | |
1246 | { | |
1247 | (void) dwarf2_directive_filename (); | |
1248 | } | |
1249 | ||
220e750f | 1250 | void |
a2e22468 | 1251 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 1252 | { |
ecea7679 RH |
1253 | offsetT filenum, line; |
1254 | ||
851feff8 DJ |
1255 | /* If we see two .loc directives in a row, force the first one to be |
1256 | output now. */ | |
7cadeb2c | 1257 | if (dwarf2_loc_directive_seen) |
6a50d470 | 1258 | dwarf2_emit_insn (0); |
851feff8 | 1259 | |
ecea7679 RH |
1260 | filenum = get_absolute_expression (); |
1261 | SKIP_WHITESPACE (); | |
1262 | line = get_absolute_expression (); | |
1263 | ||
1264 | if (filenum < 1) | |
1265 | { | |
498ff032 AM |
1266 | if (filenum == 0 && dwarf_level < 5) |
1267 | dwarf_level = 5; | |
1268 | if (filenum < 0 || DWARF2_LINE_VERSION < 5) | |
5496f3c6 | 1269 | { |
498ff032 AM |
1270 | as_bad (_("file number less than one")); |
1271 | return; | |
5496f3c6 | 1272 | } |
ecea7679 | 1273 | } |
5496f3c6 | 1274 | |
498ff032 | 1275 | if ((valueT) filenum >= files_in_use || files[filenum].filename == NULL) |
ecea7679 RH |
1276 | { |
1277 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
1278 | return; | |
1279 | } | |
1280 | ||
51298b33 AM |
1281 | /* debug_type will be turned off by dwarf2_directive_filename, and |
1282 | if we don't have a dwarf style .file then files_in_use will be | |
1283 | zero and the above error will trigger. */ | |
1284 | gas_assert (debug_type == DEBUG_NONE); | |
1285 | ||
ecea7679 RH |
1286 | current.filenum = filenum; |
1287 | current.line = line; | |
92846e72 | 1288 | current.discriminator = 0; |
ecea7679 RH |
1289 | |
1290 | #ifndef NO_LISTING | |
1291 | if (listing) | |
1292 | { | |
1293 | if (files[filenum].dir) | |
1294 | { | |
1295 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
1296 | size_t file_len = strlen (files[filenum].filename); | |
add39d23 | 1297 | char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1); |
ecea7679 RH |
1298 | |
1299 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 1300 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
1301 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
1302 | cp[dir_len + file_len + 1] = '\0'; | |
1303 | listing_source_file (cp); | |
e1fa0163 | 1304 | free (cp); |
ecea7679 RH |
1305 | } |
1306 | else | |
1307 | listing_source_file (files[filenum].filename); | |
1308 | listing_source_line (line); | |
1309 | } | |
1310 | #endif | |
1311 | ||
220e750f | 1312 | SKIP_WHITESPACE (); |
ecea7679 RH |
1313 | if (ISDIGIT (*input_line_pointer)) |
1314 | { | |
1315 | current.column = get_absolute_expression (); | |
1316 | SKIP_WHITESPACE (); | |
1317 | } | |
1318 | ||
1319 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 1320 | { |
bd0eb99b RH |
1321 | char *p, c; |
1322 | offsetT value; | |
1323 | ||
d02603dc | 1324 | c = get_symbol_name (& p); |
bd0eb99b RH |
1325 | |
1326 | if (strcmp (p, "basic_block") == 0) | |
1327 | { | |
1328 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1329 | *input_line_pointer = c; | |
1330 | } | |
1331 | else if (strcmp (p, "prologue_end") == 0) | |
1332 | { | |
6cb7f6d9 TV |
1333 | if (dwarf_level < 3) |
1334 | dwarf_level = 3; | |
bd0eb99b RH |
1335 | current.flags |= DWARF2_FLAG_PROLOGUE_END; |
1336 | *input_line_pointer = c; | |
1337 | } | |
1338 | else if (strcmp (p, "epilogue_begin") == 0) | |
1339 | { | |
6cb7f6d9 TV |
1340 | if (dwarf_level < 3) |
1341 | dwarf_level = 3; | |
bd0eb99b RH |
1342 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; |
1343 | *input_line_pointer = c; | |
1344 | } | |
1345 | else if (strcmp (p, "is_stmt") == 0) | |
1346 | { | |
d02603dc | 1347 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1348 | value = get_absolute_expression (); |
1349 | if (value == 0) | |
1350 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
1351 | else if (value == 1) | |
1352 | current.flags |= DWARF2_FLAG_IS_STMT; | |
1353 | else | |
ecea7679 RH |
1354 | { |
1355 | as_bad (_("is_stmt value not 0 or 1")); | |
1356 | return; | |
1357 | } | |
bd0eb99b RH |
1358 | } |
1359 | else if (strcmp (p, "isa") == 0) | |
1360 | { | |
6cb7f6d9 TV |
1361 | if (dwarf_level < 3) |
1362 | dwarf_level = 3; | |
d02603dc | 1363 | (void) restore_line_pointer (c); |
bd0eb99b | 1364 | value = get_absolute_expression (); |
ecea7679 | 1365 | if (value >= 0) |
bd0eb99b | 1366 | current.isa = value; |
ecea7679 RH |
1367 | else |
1368 | { | |
1369 | as_bad (_("isa number less than zero")); | |
1370 | return; | |
1371 | } | |
bd0eb99b | 1372 | } |
92846e72 CC |
1373 | else if (strcmp (p, "discriminator") == 0) |
1374 | { | |
d02603dc | 1375 | (void) restore_line_pointer (c); |
92846e72 CC |
1376 | value = get_absolute_expression (); |
1377 | if (value >= 0) | |
1378 | current.discriminator = value; | |
1379 | else | |
1380 | { | |
1381 | as_bad (_("discriminator less than zero")); | |
1382 | return; | |
1383 | } | |
1384 | } | |
ba8826a8 AO |
1385 | else if (strcmp (p, "view") == 0) |
1386 | { | |
1387 | symbolS *sym; | |
1388 | ||
1389 | (void) restore_line_pointer (c); | |
1390 | SKIP_WHITESPACE (); | |
1391 | ||
1392 | if (ISDIGIT (*input_line_pointer) | |
1393 | || *input_line_pointer == '-') | |
1394 | { | |
5b7c81bd | 1395 | bool force_reset = *input_line_pointer == '-'; |
ba8826a8 AO |
1396 | |
1397 | value = get_absolute_expression (); | |
1398 | if (value != 0) | |
1399 | { | |
1400 | as_bad (_("numeric view can only be asserted to zero")); | |
1401 | return; | |
1402 | } | |
1403 | if (force_reset && force_reset_view) | |
1404 | sym = force_reset_view; | |
1405 | else | |
1406 | { | |
e01e1cee AM |
1407 | sym = symbol_temp_new (absolute_section, &zero_address_frag, |
1408 | value); | |
ba8826a8 AO |
1409 | if (force_reset) |
1410 | force_reset_view = sym; | |
1411 | } | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | char *name = read_symbol_name (); | |
1416 | ||
1417 | if (!name) | |
1418 | return; | |
1419 | sym = symbol_find_or_make (name); | |
82cb2524 | 1420 | free (name); |
38cf168b | 1421 | if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) |
ba8826a8 | 1422 | { |
38cf168b | 1423 | if (S_IS_VOLATILE (sym)) |
ba8826a8 | 1424 | sym = symbol_clone (sym, 1); |
38cf168b AM |
1425 | else if (!S_CAN_BE_REDEFINED (sym)) |
1426 | { | |
82cb2524 AM |
1427 | as_bad (_("symbol `%s' is already defined"), |
1428 | S_GET_NAME (sym)); | |
38cf168b AM |
1429 | return; |
1430 | } | |
ba8826a8 | 1431 | } |
38cf168b AM |
1432 | S_SET_SEGMENT (sym, undefined_section); |
1433 | S_SET_VALUE (sym, 0); | |
1434 | symbol_set_frag (sym, &zero_address_frag); | |
ba8826a8 | 1435 | } |
51298b33 | 1436 | current.u.view = sym; |
ba8826a8 | 1437 | } |
bd0eb99b RH |
1438 | else |
1439 | { | |
ecea7679 | 1440 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
d02603dc | 1441 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1442 | return; |
1443 | } | |
1444 | ||
d02603dc | 1445 | SKIP_WHITESPACE_AFTER_NAME (); |
bd0eb99b RH |
1446 | } |
1447 | ||
1448 | demand_empty_rest_of_line (); | |
5b7c81bd | 1449 | dwarf2_any_loc_directive_seen = dwarf2_loc_directive_seen = true; |
ba8826a8 AO |
1450 | |
1451 | /* If we were given a view id, emit the row right away. */ | |
51298b33 | 1452 | if (current.u.view) |
ba8826a8 | 1453 | dwarf2_emit_insn (0); |
220e750f | 1454 | } |
07a53e5c RH |
1455 | |
1456 | void | |
1457 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
1458 | { | |
1459 | offsetT value = get_absolute_expression (); | |
1460 | ||
1461 | if (value != 0 && value != 1) | |
1462 | { | |
1463 | as_bad (_("expected 0 or 1")); | |
1464 | ignore_rest_of_line (); | |
1465 | } | |
1466 | else | |
1467 | { | |
1468 | dwarf2_loc_mark_labels = value != 0; | |
1469 | demand_empty_rest_of_line (); | |
1470 | } | |
1471 | } | |
220e750f RH |
1472 | \f |
1473 | static struct frag * | |
a2e22468 | 1474 | first_frag_for_seg (segT seg) |
220e750f | 1475 | { |
c9049d30 | 1476 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
1477 | } |
1478 | ||
1479 | static struct frag * | |
a2e22468 | 1480 | last_frag_for_seg (segT seg) |
220e750f | 1481 | { |
c9049d30 | 1482 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 1483 | |
c9049d30 AM |
1484 | while (f->frch_next != NULL) |
1485 | f = f->frch_next; | |
220e750f | 1486 | |
c9049d30 | 1487 | return f->frch_last; |
220e750f RH |
1488 | } |
1489 | \f | |
1490 | /* Emit a single byte into the current segment. */ | |
1491 | ||
1492 | static inline void | |
a2e22468 | 1493 | out_byte (int byte) |
220e750f RH |
1494 | { |
1495 | FRAG_APPEND_1_CHAR (byte); | |
1496 | } | |
1497 | ||
1498 | /* Emit a statement program opcode into the current segment. */ | |
1499 | ||
1500 | static inline void | |
a2e22468 | 1501 | out_opcode (int opc) |
220e750f RH |
1502 | { |
1503 | out_byte (opc); | |
1504 | } | |
1505 | ||
1506 | /* Emit a two-byte word into the current segment. */ | |
1507 | ||
1508 | static inline void | |
a2e22468 | 1509 | out_two (int data) |
220e750f RH |
1510 | { |
1511 | md_number_to_chars (frag_more (2), data, 2); | |
1512 | } | |
1513 | ||
1514 | /* Emit a four byte word into the current segment. */ | |
1515 | ||
1516 | static inline void | |
a2e22468 | 1517 | out_four (int data) |
220e750f RH |
1518 | { |
1519 | md_number_to_chars (frag_more (4), data, 4); | |
1520 | } | |
1521 | ||
1522 | /* Emit an unsigned "little-endian base 128" number. */ | |
1523 | ||
fac0d250 | 1524 | static void |
a2e22468 | 1525 | out_uleb128 (addressT value) |
220e750f RH |
1526 | { |
1527 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
1528 | } | |
1529 | ||
92846e72 CC |
1530 | /* Emit a signed "little-endian base 128" number. */ |
1531 | ||
1532 | static void | |
1533 | out_leb128 (addressT value) | |
1534 | { | |
1535 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
1536 | } | |
1537 | ||
220e750f RH |
1538 | /* Emit a tuple for .debug_abbrev. */ |
1539 | ||
1540 | static inline void | |
a2e22468 | 1541 | out_abbrev (int name, int form) |
fac0d250 | 1542 | { |
220e750f RH |
1543 | out_uleb128 (name); |
1544 | out_uleb128 (form); | |
1545 | } | |
fac0d250 | 1546 | |
220e750f | 1547 | /* Get the size of a fragment. */ |
fac0d250 | 1548 | |
220e750f | 1549 | static offsetT |
c9049d30 | 1550 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
1551 | { |
1552 | frchainS *fr; | |
1553 | ||
1554 | if (frag->fr_next) | |
1555 | return frag->fr_fix; | |
1556 | ||
1557 | /* If a fragment is the last in the chain, special measures must be | |
1558 | taken to find its size before relaxation, since it may be pending | |
1559 | on some subsegment chain. */ | |
c9049d30 | 1560 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 1561 | if (fr->frch_last == frag) |
c5c0a210 | 1562 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
1563 | |
1564 | abort (); | |
1565 | } | |
fac0d250 | 1566 | |
220e750f | 1567 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 1568 | |
220e750f | 1569 | static void |
07a53e5c | 1570 | out_set_addr (symbolS *sym) |
220e750f | 1571 | { |
91d6fa6a | 1572 | expressionS exp; |
9e3af0e7 | 1573 | |
031e3350 | 1574 | memset (&exp, 0, sizeof exp); |
e2b9a97e CE |
1575 | out_opcode (DW_LNS_extended_op); |
1576 | out_uleb128 (sizeof_address + 1); | |
fac0d250 | 1577 | |
e2b9a97e | 1578 | out_opcode (DW_LNE_set_address); |
91d6fa6a NC |
1579 | exp.X_op = O_symbol; |
1580 | exp.X_add_symbol = sym; | |
1581 | exp.X_add_number = 0; | |
1582 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
1583 | } |
1584 | ||
a3b75434 | 1585 | static void |
6f6f5b0a | 1586 | scale_addr_delta (int line_delta, addressT *addr_delta) |
a3b75434 DD |
1587 | { |
1588 | static int printed_this = 0; | |
8fbf7334 | 1589 | if (DWARF2_LINE_MIN_INSN_LENGTH > 1) |
a3b75434 | 1590 | { |
6f6f5b0a AM |
1591 | /* Don't error on non-instruction bytes at end of section. */ |
1592 | if (line_delta != INT_MAX | |
1593 | && *addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this) | |
8f02ae5b | 1594 | { |
8fbf7334 | 1595 | as_bad("unaligned opcodes detected in executable segment"); |
8f02ae5b AM |
1596 | printed_this = 1; |
1597 | } | |
8fbf7334 | 1598 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; |
a3b75434 | 1599 | } |
a3b75434 | 1600 | } |
a3b75434 | 1601 | |
220e750f RH |
1602 | /* Encode a pair of line and address skips as efficiently as possible. |
1603 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 1604 | |
220e750f RH |
1605 | The following two routines *must* be kept in sync. This is |
1606 | enforced by making emit_inc_line_addr abort if we do not emit | |
1607 | exactly the expected number of bytes. */ | |
1608 | ||
1609 | static int | |
a2e22468 | 1610 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 1611 | { |
220e750f RH |
1612 | unsigned int tmp, opcode; |
1613 | int len = 0; | |
fac0d250 | 1614 | |
220e750f | 1615 | /* Scale the address delta by the minimum instruction length. */ |
6f6f5b0a | 1616 | scale_addr_delta (line_delta, &addr_delta); |
220e750f RH |
1617 | |
1618 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
1619 | We cannot use special opcodes here, since we want the end_sequence | |
1620 | to emit the matrix entry. */ | |
1621 | if (line_delta == INT_MAX) | |
fac0d250 | 1622 | { |
220e750f RH |
1623 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1624 | len = 1; | |
62e6b7b3 | 1625 | else if (addr_delta) |
220e750f RH |
1626 | len = 1 + sizeof_leb128 (addr_delta, 0); |
1627 | return len + 3; | |
fac0d250 | 1628 | } |
fac0d250 | 1629 | |
220e750f RH |
1630 | /* Bias the line delta by the base. */ |
1631 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 1632 | |
220e750f RH |
1633 | /* If the line increment is out of range of a special opcode, we |
1634 | must encode it with DW_LNS_advance_line. */ | |
1635 | if (tmp >= DWARF2_LINE_RANGE) | |
1636 | { | |
1637 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1638 | line_delta = 0; | |
1639 | tmp = 0 - DWARF2_LINE_BASE; | |
1640 | } | |
fac0d250 | 1641 | |
220e750f RH |
1642 | /* Bias the opcode by the special opcode base. */ |
1643 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 1644 | |
220e750f | 1645 | /* Avoid overflow when addr_delta is large. */ |
4788abde | 1646 | if (addr_delta < 256U + MAX_SPECIAL_ADDR_DELTA) |
220e750f RH |
1647 | { |
1648 | /* Try using a special opcode. */ | |
1649 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1650 | if (opcode <= 255) | |
1651 | return len + 1; | |
1652 | ||
1653 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1654 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1655 | if (opcode <= 255) | |
1656 | return len + 2; | |
1657 | } | |
1658 | ||
1659 | /* Otherwise use DW_LNS_advance_pc. */ | |
1660 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
1661 | ||
1662 | /* DW_LNS_copy or special opcode. */ | |
1663 | len += 1; | |
1664 | ||
1665 | return len; | |
1666 | } | |
fac0d250 | 1667 | |
220e750f | 1668 | static void |
a2e22468 | 1669 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
1670 | { |
1671 | unsigned int tmp, opcode; | |
1672 | int need_copy = 0; | |
1673 | char *end = p + len; | |
fac0d250 | 1674 | |
07a53e5c RH |
1675 | /* Line number sequences cannot go backward in addresses. This means |
1676 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1677 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 1678 | |
220e750f | 1679 | /* Scale the address delta by the minimum instruction length. */ |
6f6f5b0a | 1680 | scale_addr_delta (line_delta, &addr_delta); |
a3b75434 | 1681 | |
220e750f RH |
1682 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
1683 | We cannot use special opcodes here, since we want the end_sequence | |
1684 | to emit the matrix entry. */ | |
1685 | if (line_delta == INT_MAX) | |
fac0d250 | 1686 | { |
220e750f RH |
1687 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1688 | *p++ = DW_LNS_const_add_pc; | |
62e6b7b3 | 1689 | else if (addr_delta) |
fac0d250 | 1690 | { |
220e750f RH |
1691 | *p++ = DW_LNS_advance_pc; |
1692 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 1693 | } |
220e750f RH |
1694 | |
1695 | *p++ = DW_LNS_extended_op; | |
1696 | *p++ = 1; | |
1697 | *p++ = DW_LNE_end_sequence; | |
1698 | goto done; | |
fac0d250 RH |
1699 | } |
1700 | ||
220e750f RH |
1701 | /* Bias the line delta by the base. */ |
1702 | tmp = line_delta - DWARF2_LINE_BASE; | |
1703 | ||
1704 | /* If the line increment is out of range of a special opcode, we | |
1705 | must encode it with DW_LNS_advance_line. */ | |
1706 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 1707 | { |
220e750f RH |
1708 | *p++ = DW_LNS_advance_line; |
1709 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 1710 | |
220e750f RH |
1711 | line_delta = 0; |
1712 | tmp = 0 - DWARF2_LINE_BASE; | |
1713 | need_copy = 1; | |
1714 | } | |
fac0d250 | 1715 | |
bd0eb99b RH |
1716 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
1717 | special opcode. */ | |
1718 | if (line_delta == 0 && addr_delta == 0) | |
1719 | { | |
1720 | *p++ = DW_LNS_copy; | |
1721 | goto done; | |
1722 | } | |
1723 | ||
220e750f RH |
1724 | /* Bias the opcode by the special opcode base. */ |
1725 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1726 | |
220e750f | 1727 | /* Avoid overflow when addr_delta is large. */ |
4788abde | 1728 | if (addr_delta < 256U + MAX_SPECIAL_ADDR_DELTA) |
fac0d250 | 1729 | { |
220e750f RH |
1730 | /* Try using a special opcode. */ |
1731 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1732 | if (opcode <= 255) | |
1733 | { | |
1734 | *p++ = opcode; | |
1735 | goto done; | |
1736 | } | |
1737 | ||
1738 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1739 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1740 | if (opcode <= 255) | |
fac0d250 | 1741 | { |
220e750f RH |
1742 | *p++ = DW_LNS_const_add_pc; |
1743 | *p++ = opcode; | |
1744 | goto done; | |
fac0d250 RH |
1745 | } |
1746 | } | |
220e750f RH |
1747 | |
1748 | /* Otherwise use DW_LNS_advance_pc. */ | |
1749 | *p++ = DW_LNS_advance_pc; | |
1750 | p += output_leb128 (p, addr_delta, 0); | |
1751 | ||
1752 | if (need_copy) | |
1753 | *p++ = DW_LNS_copy; | |
fac0d250 | 1754 | else |
220e750f | 1755 | *p++ = tmp; |
fac0d250 | 1756 | |
220e750f | 1757 | done: |
9c2799c2 | 1758 | gas_assert (p == end); |
220e750f | 1759 | } |
a8316fe2 | 1760 | |
220e750f | 1761 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1762 | |
220e750f | 1763 | static void |
a2e22468 | 1764 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1765 | { |
1766 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1767 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1768 | } | |
9de8d8f1 | 1769 | |
1737851b BW |
1770 | /* Write out an alternative form of line and address skips using |
1771 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1772 | line and address information, but it is required if linker relaxation |
1773 | could change the code offsets. The following two routines *must* be | |
1774 | kept in sync. */ | |
453dc3f0 | 1775 | #define ADDR_DELTA_LIMIT 50000 |
1737851b | 1776 | |
7ddd14de BW |
1777 | static int |
1778 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1779 | { |
7ddd14de | 1780 | int len = 0; |
1737851b BW |
1781 | |
1782 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1783 | if (line_delta != INT_MAX) |
1784 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1785 | ||
453dc3f0 | 1786 | if (addr_delta > ADDR_DELTA_LIMIT) |
7ddd14de BW |
1787 | { |
1788 | /* DW_LNS_extended_op */ | |
1789 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1790 | /* DW_LNE_set_address */ | |
1791 | len += 1 + sizeof_address; | |
1792 | } | |
1793 | else | |
1794 | /* DW_LNS_fixed_advance_pc */ | |
1795 | len += 3; | |
1796 | ||
1737851b | 1797 | if (line_delta == INT_MAX) |
7ddd14de BW |
1798 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1799 | len += 3; | |
1800 | else | |
1801 | /* DW_LNS_copy */ | |
1802 | len += 1; | |
1803 | ||
1804 | return len; | |
1805 | } | |
1806 | ||
1807 | static void | |
1808 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1809 | char *p, int len) | |
1810 | { | |
91d6fa6a | 1811 | expressionS *pexp; |
7ddd14de BW |
1812 | char *end = p + len; |
1813 | ||
1814 | /* Line number sequences cannot go backward in addresses. This means | |
1815 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1816 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de | 1817 | |
b40bf0a2 NC |
1818 | /* Verify that we have kept in sync with size_fixed_inc_line_addr. */ |
1819 | gas_assert (len == size_fixed_inc_line_addr (line_delta, addr_delta)); | |
1820 | ||
7ddd14de BW |
1821 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ |
1822 | if (line_delta != INT_MAX) | |
1823 | { | |
1824 | *p++ = DW_LNS_advance_line; | |
1825 | p += output_leb128 (p, line_delta, 1); | |
1826 | } | |
1827 | ||
91d6fa6a | 1828 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1829 | |
1830 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1831 | advance the address by at most 64K. Linker relaxation (without | |
1832 | which this function would not be used) could change the operand by | |
1833 | an unknown amount. If the address increment is getting close to | |
1834 | the limit, just reset the address. */ | |
453dc3f0 | 1835 | if (addr_delta > ADDR_DELTA_LIMIT) |
1737851b | 1836 | { |
7ddd14de | 1837 | symbolS *to_sym; |
91d6fa6a | 1838 | expressionS exp; |
7ddd14de | 1839 | |
031e3350 | 1840 | memset (&exp, 0, sizeof exp); |
9f6db0d3 | 1841 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1842 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1843 | |
1844 | *p++ = DW_LNS_extended_op; | |
1845 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1846 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1847 | exp.X_op = O_symbol; |
1848 | exp.X_add_symbol = to_sym; | |
1849 | exp.X_add_number = 0; | |
62ebcb5c | 1850 | emit_expr_fix (&exp, sizeof_address, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de BW |
1851 | p += sizeof_address; |
1852 | } | |
1853 | else | |
1854 | { | |
1855 | *p++ = DW_LNS_fixed_advance_pc; | |
62ebcb5c | 1856 | emit_expr_fix (pexp, 2, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de | 1857 | p += 2; |
1737851b BW |
1858 | } |
1859 | ||
7ddd14de BW |
1860 | if (line_delta == INT_MAX) |
1861 | { | |
1862 | *p++ = DW_LNS_extended_op; | |
1863 | *p++ = 1; | |
1864 | *p++ = DW_LNE_end_sequence; | |
1865 | } | |
1866 | else | |
1867 | *p++ = DW_LNS_copy; | |
1737851b | 1868 | |
9c2799c2 | 1869 | gas_assert (p == end); |
1737851b BW |
1870 | } |
1871 | ||
220e750f RH |
1872 | /* Generate a variant frag that we can use to relax address/line |
1873 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1874 | |
220e750f | 1875 | static void |
07a53e5c | 1876 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1877 | { |
91d6fa6a | 1878 | expressionS exp; |
220e750f | 1879 | int max_chars; |
6576f0b5 | 1880 | |
031e3350 | 1881 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
1882 | exp.X_op = O_subtract; |
1883 | exp.X_add_symbol = to_sym; | |
1884 | exp.X_op_symbol = from_sym; | |
1885 | exp.X_add_number = 0; | |
fac0d250 | 1886 | |
220e750f RH |
1887 | /* The maximum size of the frag is the line delta with a maximum |
1888 | sized address delta. */ | |
7ddd14de BW |
1889 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1890 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1891 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1892 | else | |
1893 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1894 | |
220e750f | 1895 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1896 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1897 | } |
fac0d250 | 1898 | |
220e750f RH |
1899 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1900 | based on the current values of the symbols. It is called before | |
1901 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1902 | |
220e750f | 1903 | int |
a2e22468 | 1904 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1905 | { |
1906 | offsetT addr_delta; | |
1907 | int size; | |
fac0d250 | 1908 | |
6386f3a7 | 1909 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1910 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1911 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1912 | else | |
1913 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1914 | |
220e750f | 1915 | frag->fr_subtype = size; |
fac0d250 | 1916 | |
220e750f RH |
1917 | return size; |
1918 | } | |
1919 | ||
1920 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1921 | current values of the symbols. fr_subtype is the current length | |
1922 | of the frag. This returns the change in frag length. */ | |
1923 | ||
1924 | int | |
a2e22468 | 1925 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1926 | { |
1927 | int old_size, new_size; | |
fac0d250 | 1928 | |
220e750f RH |
1929 | old_size = frag->fr_subtype; |
1930 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1931 | |
220e750f | 1932 | return new_size - old_size; |
fac0d250 RH |
1933 | } |
1934 | ||
220e750f RH |
1935 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1936 | fill frag. This is called after all relaxation has been done. | |
1937 | fr_subtype will be the desired length of the frag. */ | |
1938 | ||
1939 | void | |
a2e22468 | 1940 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1941 | { |
220e750f RH |
1942 | offsetT addr_diff; |
1943 | ||
453dc3f0 NC |
1944 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1945 | { | |
2b0f3761 | 1946 | /* If linker relaxation is enabled then the distance between the two |
453dc3f0 NC |
1947 | symbols in the frag->fr_symbol expression might change. Hence we |
1948 | cannot rely upon the value computed by resolve_symbol_value. | |
1949 | Instead we leave the expression unfinalized and allow | |
1950 | emit_fixed_inc_line_addr to create a fixup (which later becomes a | |
1951 | relocation) that will allow the linker to correctly compute the | |
1952 | actual address difference. We have to use a fixed line advance for | |
1953 | this as we cannot (easily) relocate leb128 encoded values. */ | |
1954 | int saved_finalize_syms = finalize_syms; | |
1955 | ||
1956 | finalize_syms = 0; | |
1957 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
1958 | finalize_syms = saved_finalize_syms; | |
1959 | } | |
1960 | else | |
1961 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
fac0d250 | 1962 | |
220e750f RH |
1963 | /* fr_var carries the max_chars that we created the fragment with. |
1964 | fr_subtype carries the current expected length. We must, of | |
1965 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1966 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1967 | |
7ddd14de BW |
1968 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1969 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1970 | frag->fr_literal + frag->fr_fix, | |
1971 | frag->fr_subtype); | |
1972 | else | |
1973 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1974 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1975 | |
1976 | frag->fr_fix += frag->fr_subtype; | |
1977 | frag->fr_type = rs_fill; | |
1978 | frag->fr_var = 0; | |
1979 | frag->fr_offset = 0; | |
1980 | } | |
1981 | ||
1982 | /* Generate .debug_line content for the chain of line number entries | |
1983 | beginning at E, for segment SEG. */ | |
1984 | ||
1985 | static void | |
a2e22468 | 1986 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1987 | { |
1988 | unsigned filenum = 1; | |
1989 | unsigned line = 1; | |
1990 | unsigned column = 0; | |
bd0eb99b RH |
1991 | unsigned isa = 0; |
1992 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1993 | fragS *last_frag = NULL, *frag; |
1994 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1995 | symbolS *last_lab = NULL, *lab; |
220e750f | 1996 | |
b40bf0a2 NC |
1997 | if (flag_dwarf_sections) |
1998 | { | |
1999 | char * name; | |
2000 | const char * sec_name; | |
2001 | ||
2b0f3761 | 2002 | /* Switch to the relevant sub-section before we start to emit |
b40bf0a2 NC |
2003 | the line number table. |
2004 | ||
2005 | FIXME: These sub-sections do not have a normal Line Number | |
2006 | Program Header, thus strictly speaking they are not valid | |
2007 | DWARF sections. Unfortunately the DWARF standard assumes | |
2008 | a one-to-one relationship between compilation units and | |
2009 | line number tables. Thus we have to have a .debug_line | |
2010 | section, as well as our sub-sections, and we have to ensure | |
2011 | that all of the sub-sections are merged into a proper | |
2012 | .debug_line section before a debugger sees them. */ | |
3739860c | 2013 | |
fd361982 | 2014 | sec_name = bfd_section_name (seg); |
b40bf0a2 NC |
2015 | if (strcmp (sec_name, ".text") != 0) |
2016 | { | |
29a2809e | 2017 | name = concat (".debug_line", sec_name, (char *) NULL); |
5b7c81bd | 2018 | subseg_set (subseg_get (name, false), 0); |
b40bf0a2 NC |
2019 | } |
2020 | else | |
2021 | /* Don't create a .debug_line.text section - | |
2022 | that is redundant. Instead just switch back to the | |
2023 | normal .debug_line section. */ | |
5b7c81bd | 2024 | subseg_set (subseg_get (".debug_line", false), 0); |
b40bf0a2 NC |
2025 | } |
2026 | ||
fead5cd9 | 2027 | do |
fac0d250 | 2028 | { |
07a53e5c | 2029 | int line_delta; |
220e750f RH |
2030 | |
2031 | if (filenum != e->loc.filenum) | |
fac0d250 | 2032 | { |
220e750f RH |
2033 | filenum = e->loc.filenum; |
2034 | out_opcode (DW_LNS_set_file); | |
2035 | out_uleb128 (filenum); | |
220e750f RH |
2036 | } |
2037 | ||
2038 | if (column != e->loc.column) | |
2039 | { | |
2040 | column = e->loc.column; | |
2041 | out_opcode (DW_LNS_set_column); | |
2042 | out_uleb128 (column); | |
220e750f RH |
2043 | } |
2044 | ||
92846e72 CC |
2045 | if (e->loc.discriminator != 0) |
2046 | { | |
2047 | out_opcode (DW_LNS_extended_op); | |
2048 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
2049 | out_opcode (DW_LNE_set_discriminator); | |
2050 | out_uleb128 (e->loc.discriminator); | |
2051 | } | |
2052 | ||
bd0eb99b RH |
2053 | if (isa != e->loc.isa) |
2054 | { | |
2055 | isa = e->loc.isa; | |
2056 | out_opcode (DW_LNS_set_isa); | |
2057 | out_uleb128 (isa); | |
bd0eb99b RH |
2058 | } |
2059 | ||
2060 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
2061 | { |
2062 | flags = e->loc.flags; | |
2063 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
2064 | } |
2065 | ||
bd0eb99b | 2066 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 2067 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 2068 | |
bd0eb99b | 2069 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 2070 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
2071 | |
2072 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 2073 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 2074 | |
fb81275c JM |
2075 | /* Don't try to optimize away redundant entries; gdb wants two |
2076 | entries for a function where the code starts on the same line as | |
2077 | the {, and there's no way to identify that case here. Trust gcc | |
2078 | to optimize appropriately. */ | |
07a53e5c RH |
2079 | line_delta = e->loc.line - line; |
2080 | lab = e->label; | |
2081 | frag = symbol_get_frag (lab); | |
2082 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 2083 | |
ba8826a8 | 2084 | if (last_frag == NULL |
51298b33 | 2085 | || (e->loc.u.view == force_reset_view && force_reset_view |
ba8826a8 AO |
2086 | /* If we're going to reset the view, but we know we're |
2087 | advancing the PC, we don't have to force with | |
2088 | set_address. We know we do when we're at the same | |
2089 | address of the same frag, and we know we might when | |
2090 | we're in the beginning of a frag, and we were at the | |
2091 | end of the previous frag. */ | |
2092 | && (frag == last_frag | |
2093 | ? (last_frag_ofs == frag_ofs) | |
2094 | : (frag_ofs == 0 | |
2095 | && ((offsetT)last_frag_ofs | |
2096 | >= get_frag_fix (last_frag, seg)))))) | |
220e750f | 2097 | { |
07a53e5c RH |
2098 | out_set_addr (lab); |
2099 | out_inc_line_addr (line_delta, 0); | |
220e750f | 2100 | } |
7ddd14de | 2101 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
2102 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
2103 | else | |
2104 | relax_inc_line_addr (line_delta, lab, last_lab); | |
2105 | ||
2106 | line = e->loc.line; | |
2107 | last_lab = lab; | |
2108 | last_frag = frag; | |
2109 | last_frag_ofs = frag_ofs; | |
220e750f | 2110 | |
82cb2524 | 2111 | e = e->next; |
fac0d250 | 2112 | } |
fead5cd9 | 2113 | while (e); |
353e2c69 | 2114 | |
220e750f | 2115 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 2116 | frag = last_frag_for_seg (seg); |
c9049d30 | 2117 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 2118 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 2119 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 2120 | else |
07a53e5c | 2121 | { |
e01e1cee | 2122 | lab = symbol_temp_new (seg, frag, frag_ofs); |
07a53e5c RH |
2123 | relax_inc_line_addr (INT_MAX, lab, last_lab); |
2124 | } | |
fac0d250 RH |
2125 | } |
2126 | ||
d2a54558 MW |
2127 | /* Switch to LINE_STR_SEG and output the given STR. Return the |
2128 | symbol pointing to the new string in the section. */ | |
2129 | ||
2130 | static symbolS * | |
2131 | add_line_strp (segT line_str_seg, const char *str) | |
2132 | { | |
2133 | char *cp; | |
2134 | size_t size; | |
2135 | symbolS *sym; | |
2136 | ||
2137 | subseg_set (line_str_seg, 0); | |
2138 | ||
2139 | sym = symbol_temp_new_now_octets (); | |
2140 | ||
2141 | size = strlen (str) + 1; | |
2142 | cp = frag_more (size); | |
2143 | memcpy (cp, str, size); | |
2144 | ||
2145 | return sym; | |
2146 | } | |
2147 | ||
2148 | ||
220e750f RH |
2149 | /* Emit the directory and file tables for .debug_line. */ |
2150 | ||
fac0d250 | 2151 | static void |
d2a54558 | 2152 | out_dir_and_file_list (segT line_seg, int sizeof_offset) |
fac0d250 RH |
2153 | { |
2154 | size_t size; | |
82cb2524 | 2155 | char *dir; |
fac0d250 | 2156 | char *cp; |
4780e5e4 | 2157 | unsigned int i, j; |
5b7c81bd AM |
2158 | bool emit_md5 = false; |
2159 | bool emit_timestamps = true; | |
2160 | bool emit_filesize = true; | |
d2a54558 | 2161 | segT line_str_seg = NULL; |
17404258 | 2162 | symbolS *line_strp, *file0_strp = NULL; |
220e750f | 2163 | |
5496f3c6 | 2164 | /* Output the Directory Table. */ |
5496f3c6 NC |
2165 | if (DWARF2_LINE_VERSION >= 5) |
2166 | { | |
546cb2d8 | 2167 | /* We only have one column in the directory table. */ |
5496f3c6 | 2168 | out_byte (1); |
546cb2d8 NC |
2169 | |
2170 | /* Describe the purpose and format of the column. */ | |
5496f3c6 | 2171 | out_uleb128 (DW_LNCT_path); |
d2a54558 MW |
2172 | /* Store these strings in the .debug_line_str section so they |
2173 | can be shared. */ | |
2174 | out_uleb128 (DW_FORM_line_strp); | |
546cb2d8 | 2175 | |
f63d03dd MW |
2176 | /* Now state how many rows there are in the table. We need at |
2177 | least 1 if there is one or more file names to store the | |
2178 | "working directory". */ | |
2179 | if (dirs_in_use == 0 && files_in_use > 0) | |
2180 | out_uleb128 (1); | |
2181 | else | |
2182 | out_uleb128 (dirs_in_use); | |
5496f3c6 NC |
2183 | } |
2184 | ||
a7ed1ca2 | 2185 | /* Emit directory list. */ |
f63d03dd | 2186 | if (DWARF2_LINE_VERSION >= 5 && (dirs_in_use > 0 || files_in_use > 0)) |
5496f3c6 | 2187 | { |
d2a54558 MW |
2188 | line_str_seg = subseg_new (".debug_line_str", 0); |
2189 | bfd_set_section_flags (line_str_seg, | |
2190 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2191 | | SEC_MERGE | SEC_STRINGS); | |
2192 | line_str_seg->entsize = 1; | |
2193 | ||
f63d03dd | 2194 | /* DWARF5 uses slot zero, but that is only set explicitly |
47513fab JB |
2195 | using a .file 0 directive. Otherwise use pwd as main file |
2196 | directory. */ | |
2197 | if (dirs_in_use > 0 && dirs[0] != NULL) | |
5496f3c6 | 2198 | dir = remap_debug_filename (dirs[0]); |
f63d03dd MW |
2199 | else |
2200 | dir = remap_debug_filename (getpwd ()); | |
2201 | ||
d2a54558 | 2202 | line_strp = add_line_strp (line_str_seg, dir); |
82cb2524 | 2203 | free (dir); |
d2a54558 MW |
2204 | subseg_set (line_seg, 0); |
2205 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
5496f3c6 | 2206 | } |
a7ed1ca2 NC |
2207 | for (i = 1; i < dirs_in_use; ++i) |
2208 | { | |
3d6b762c | 2209 | dir = remap_debug_filename (dirs[i]); |
d2a54558 MW |
2210 | if (DWARF2_LINE_VERSION < 5) |
2211 | { | |
2212 | size = strlen (dir) + 1; | |
2213 | cp = frag_more (size); | |
2214 | memcpy (cp, dir, size); | |
2215 | } | |
2216 | else | |
2217 | { | |
2218 | line_strp = add_line_strp (line_str_seg, dir); | |
2219 | subseg_set (line_seg, 0); | |
2220 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2221 | } | |
82cb2524 | 2222 | free (dir); |
a7ed1ca2 | 2223 | } |
fac0d250 | 2224 | |
5496f3c6 NC |
2225 | if (DWARF2_LINE_VERSION < 5) |
2226 | /* Terminate it. */ | |
2227 | out_byte ('\0'); | |
2228 | ||
2229 | /* Output the File Name Table. */ | |
5496f3c6 NC |
2230 | if (DWARF2_LINE_VERSION >= 5) |
2231 | { | |
2232 | unsigned int columns = 4; | |
2233 | ||
2234 | if (((unsigned long) DWARF2_FILE_TIME_NAME ("", "")) == -1UL) | |
2235 | { | |
5b7c81bd | 2236 | emit_timestamps = false; |
5496f3c6 NC |
2237 | -- columns; |
2238 | } | |
2239 | ||
2240 | if (DWARF2_FILE_SIZE_NAME ("", "") == -1) | |
2241 | { | |
5b7c81bd | 2242 | emit_filesize = false; |
5496f3c6 NC |
2243 | -- columns; |
2244 | } | |
2245 | ||
2246 | for (i = 0; i < files_in_use; ++i) | |
2247 | if (files[i].md5[0] != 0) | |
2248 | break; | |
2249 | if (i < files_in_use) | |
2250 | { | |
5b7c81bd | 2251 | emit_md5 = true; |
5496f3c6 NC |
2252 | ++ columns; |
2253 | } | |
2254 | ||
2255 | /* The number of format entries to follow. */ | |
2256 | out_byte (columns); | |
5496f3c6 NC |
2257 | /* The format of the file name. */ |
2258 | out_uleb128 (DW_LNCT_path); | |
d2a54558 MW |
2259 | /* Store these strings in the .debug_line_str section so they |
2260 | can be shared. */ | |
2261 | out_uleb128 (DW_FORM_line_strp); | |
5496f3c6 NC |
2262 | |
2263 | /* The format of the directory index. */ | |
2264 | out_uleb128 (DW_LNCT_directory_index); | |
2265 | out_uleb128 (DW_FORM_udata); | |
2266 | ||
2267 | if (emit_timestamps) | |
2268 | { | |
2269 | /* The format of the timestamp. */ | |
2270 | out_uleb128 (DW_LNCT_timestamp); | |
2271 | out_uleb128 (DW_FORM_udata); | |
2272 | } | |
2273 | ||
2274 | if (emit_filesize) | |
2275 | { | |
2276 | /* The format of the file size. */ | |
2277 | out_uleb128 (DW_LNCT_size); | |
2278 | out_uleb128 (DW_FORM_udata); | |
2279 | } | |
2280 | ||
2281 | if (emit_md5) | |
2282 | { | |
2283 | /* The format of the MD5 sum. */ | |
2284 | out_uleb128 (DW_LNCT_MD5); | |
2285 | out_uleb128 (DW_FORM_data16); | |
2286 | } | |
2287 | ||
2288 | /* The number of entries in the table. */ | |
2289 | out_uleb128 (files_in_use); | |
2290 | } | |
2291 | ||
2292 | for (i = DWARF2_LINE_VERSION > 4 ? 0 : 1; i < files_in_use; ++i) | |
fac0d250 | 2293 | { |
01e1a5bc NC |
2294 | const char *fullfilename; |
2295 | ||
249e3833 RH |
2296 | if (files[i].filename == NULL) |
2297 | { | |
8728bc3d JB |
2298 | if (DWARF2_LINE_VERSION < 5 || i != 0) |
2299 | { | |
2300 | as_bad (_("unassigned file number %ld"), (long) i); | |
2301 | continue; | |
2302 | } | |
2303 | /* DWARF5 uses slot zero, but that is only set explicitly using | |
2304 | a .file 0 directive. If that isn't used, but file 1 is, then | |
2305 | use that as main file name. */ | |
2306 | if (files_in_use > 1 && files[1].filename != NULL) | |
4780e5e4 TV |
2307 | { |
2308 | files[0].filename = files[1].filename; | |
2309 | files[0].dir = files[1].dir; | |
2310 | if (emit_md5) | |
86770591 | 2311 | for (j = 0; j < NUM_MD5_BYTES; ++j) |
4780e5e4 TV |
2312 | files[0].md5[j] = files[1].md5[j]; |
2313 | } | |
f63d03dd | 2314 | else |
8728bc3d | 2315 | files[0].filename = ""; |
249e3833 RH |
2316 | } |
2317 | ||
01e1a5bc NC |
2318 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
2319 | files[i].dir ? dirs [files [i].dir] : ""); | |
d2a54558 MW |
2320 | if (DWARF2_LINE_VERSION < 5) |
2321 | { | |
2322 | size = strlen (fullfilename) + 1; | |
2323 | cp = frag_more (size); | |
2324 | memcpy (cp, fullfilename, size); | |
2325 | } | |
2326 | else | |
2327 | { | |
17404258 JB |
2328 | if (!file0_strp) |
2329 | line_strp = add_line_strp (line_str_seg, fullfilename); | |
2330 | else | |
2331 | line_strp = file0_strp; | |
d2a54558 MW |
2332 | subseg_set (line_seg, 0); |
2333 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
17404258 JB |
2334 | if (i == 0 && files_in_use > 1 |
2335 | && files[0].filename == files[1].filename) | |
2336 | file0_strp = line_strp; | |
2337 | else | |
2338 | file0_strp = NULL; | |
d2a54558 | 2339 | } |
fac0d250 | 2340 | |
5496f3c6 NC |
2341 | /* Directory number. */ |
2342 | out_uleb128 (files[i].dir); | |
2343 | ||
01e1a5bc | 2344 | /* Output the last modification timestamp. */ |
5496f3c6 NC |
2345 | if (emit_timestamps) |
2346 | { | |
2347 | offsetT timestamp; | |
2348 | ||
2349 | timestamp = DWARF2_FILE_TIME_NAME (files[i].filename, | |
2350 | files[i].dir ? dirs [files [i].dir] : ""); | |
2351 | if (timestamp == -1) | |
2352 | timestamp = 0; | |
2353 | out_uleb128 (timestamp); | |
2354 | } | |
2355 | ||
01e1a5bc | 2356 | /* Output the filesize. */ |
5496f3c6 NC |
2357 | if (emit_filesize) |
2358 | { | |
2359 | offsetT filesize; | |
2360 | filesize = DWARF2_FILE_SIZE_NAME (files[i].filename, | |
2361 | files[i].dir ? dirs [files [i].dir] : ""); | |
2362 | if (filesize == -1) | |
2363 | filesize = 0; | |
2364 | out_uleb128 (filesize); | |
2365 | } | |
2366 | ||
2367 | /* Output the md5 sum. */ | |
2368 | if (emit_md5) | |
2369 | { | |
2370 | int b; | |
2371 | ||
2372 | for (b = 0; b < NUM_MD5_BYTES; b++) | |
2373 | out_byte (files[i].md5[b]); | |
2374 | } | |
fac0d250 | 2375 | } |
353e2c69 | 2376 | |
5496f3c6 NC |
2377 | if (DWARF2_LINE_VERSION < 5) |
2378 | /* Terminate filename list. */ | |
2379 | out_byte (0); | |
fac0d250 RH |
2380 | } |
2381 | ||
413a266c AM |
2382 | /* Switch to SEC and output a header length field. Return the size of |
2383 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
d025d5e5 MW |
2384 | to the end of the section. EXPR->X_add_number will be set to the |
2385 | negative size of the header. */ | |
413a266c AM |
2386 | |
2387 | static int | |
91d6fa6a | 2388 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
2389 | { |
2390 | symbolS *start_sym; | |
2391 | symbolS *end_sym; | |
2392 | ||
2393 | subseg_set (sec, 0); | |
b57dc16f | 2394 | |
0f8f0c57 NC |
2395 | if (flag_dwarf_sections) |
2396 | { | |
2397 | /* If we are going to put the start and end symbols in different | |
2398 | sections, then we need real symbols, not just fake, local ones. */ | |
2399 | frag_now_fix (); | |
2400 | start_sym = symbol_make (".Ldebug_line_start"); | |
2401 | end_sym = symbol_make (".Ldebug_line_end"); | |
2402 | symbol_set_value_now (start_sym); | |
2403 | } | |
2404 | else | |
0f8f0c57 | 2405 | { |
72354279 | 2406 | start_sym = symbol_temp_new_now_octets (); |
0f8f0c57 NC |
2407 | end_sym = symbol_temp_make (); |
2408 | } | |
413a266c AM |
2409 | |
2410 | /* Total length of the information. */ | |
91d6fa6a NC |
2411 | exp->X_op = O_subtract; |
2412 | exp->X_add_symbol = end_sym; | |
2413 | exp->X_op_symbol = start_sym; | |
413a266c AM |
2414 | |
2415 | switch (DWARF2_FORMAT (sec)) | |
2416 | { | |
2417 | case dwarf2_format_32bit: | |
91d6fa6a NC |
2418 | exp->X_add_number = -4; |
2419 | emit_expr (exp, 4); | |
413a266c AM |
2420 | return 4; |
2421 | ||
2422 | case dwarf2_format_64bit: | |
91d6fa6a | 2423 | exp->X_add_number = -12; |
413a266c | 2424 | out_four (-1); |
91d6fa6a | 2425 | emit_expr (exp, 8); |
413a266c AM |
2426 | return 8; |
2427 | ||
2428 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
2429 | exp->X_add_number = -8; |
2430 | emit_expr (exp, 8); | |
413a266c AM |
2431 | return 8; |
2432 | } | |
2433 | ||
2434 | as_fatal (_("internal error: unknown dwarf2 format")); | |
2435 | return 0; | |
2436 | } | |
2437 | ||
220e750f RH |
2438 | /* Emit the collected .debug_line data. */ |
2439 | ||
2440 | static void | |
a2e22468 | 2441 | out_debug_line (segT line_seg) |
220e750f | 2442 | { |
91d6fa6a | 2443 | expressionS exp; |
02fe846e | 2444 | symbolS *prologue_start, *prologue_end; |
220e750f RH |
2445 | symbolS *line_end; |
2446 | struct line_seg *s; | |
14e777e0 | 2447 | int sizeof_offset; |
220e750f | 2448 | |
031e3350 | 2449 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2450 | sizeof_offset = out_header (line_seg, &exp); |
2451 | line_end = exp.X_add_symbol; | |
220e750f RH |
2452 | |
2453 | /* Version. */ | |
88ebb0a1 | 2454 | out_two (DWARF2_LINE_VERSION); |
220e750f | 2455 | |
5496f3c6 NC |
2456 | if (DWARF2_LINE_VERSION >= 5) |
2457 | { | |
2458 | out_byte (sizeof_address); | |
2459 | out_byte (0); /* Segment Selector size. */ | |
2460 | } | |
220e750f | 2461 | /* Length of the prologue following this length. */ |
02fe846e | 2462 | prologue_start = symbol_temp_make (); |
413a266c | 2463 | prologue_end = symbol_temp_make (); |
02fe846e | 2464 | exp.X_op = O_subtract; |
91d6fa6a | 2465 | exp.X_add_symbol = prologue_end; |
02fe846e AM |
2466 | exp.X_op_symbol = prologue_start; |
2467 | exp.X_add_number = 0; | |
91d6fa6a | 2468 | emit_expr (&exp, sizeof_offset); |
e2b9a97e | 2469 | symbol_set_value_now (prologue_start); |
220e750f RH |
2470 | |
2471 | /* Parameters of the state machine. */ | |
2472 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
5496f3c6 NC |
2473 | if (DWARF2_LINE_VERSION >= 4) |
2474 | out_byte (DWARF2_LINE_MAX_OPS_PER_INSN); | |
220e750f RH |
2475 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); |
2476 | out_byte (DWARF2_LINE_BASE); | |
2477 | out_byte (DWARF2_LINE_RANGE); | |
2478 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
2479 | ||
2480 | /* Standard opcode lengths. */ | |
2481 | out_byte (0); /* DW_LNS_copy */ | |
2482 | out_byte (1); /* DW_LNS_advance_pc */ | |
2483 | out_byte (1); /* DW_LNS_advance_line */ | |
2484 | out_byte (1); /* DW_LNS_set_file */ | |
2485 | out_byte (1); /* DW_LNS_set_column */ | |
2486 | out_byte (0); /* DW_LNS_negate_stmt */ | |
2487 | out_byte (0); /* DW_LNS_set_basic_block */ | |
2488 | out_byte (0); /* DW_LNS_const_add_pc */ | |
2489 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
6cb7f6d9 TV |
2490 | if (DWARF2_LINE_VERSION >= 3) |
2491 | { | |
2492 | out_byte (0); /* DW_LNS_set_prologue_end */ | |
2493 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
2494 | out_byte (1); /* DW_LNS_set_isa */ | |
2495 | /* We have emitted 12 opcode lengths, so make that this | |
2496 | matches up to the opcode base value we have been using. */ | |
2497 | gas_assert (DWARF2_LINE_OPCODE_BASE == 13); | |
2498 | } | |
2499 | else | |
2500 | gas_assert (DWARF2_LINE_OPCODE_BASE == 10); | |
220e750f | 2501 | |
d2a54558 | 2502 | out_dir_and_file_list (line_seg, sizeof_offset); |
220e750f | 2503 | |
e2b9a97e | 2504 | symbol_set_value_now (prologue_end); |
220e750f RH |
2505 | |
2506 | /* For each section, emit a statement program. */ | |
ee515fb7 | 2507 | for (s = all_segs; s; s = s->next) |
bcb78b47 NC |
2508 | /* Paranoia - this check should have already have |
2509 | been handled in dwarf2_gen_line_info_1(). */ | |
ef9768e3 | 2510 | if (s->head->head && SEG_NORMAL (s->seg)) |
9aec2026 | 2511 | process_entries (s->seg, s->head->head); |
220e750f | 2512 | |
b40bf0a2 NC |
2513 | if (flag_dwarf_sections) |
2514 | /* We have to switch to the special .debug_line_end section | |
2515 | before emitting the end-of-debug_line symbol. The linker | |
2516 | script arranges for this section to be placed after all the | |
2517 | (potentially garbage collected) .debug_line.<foo> sections. | |
2518 | This section contains the line_end symbol which is used to | |
2519 | compute the size of the linked .debug_line section, as seen | |
2520 | in the DWARF Line Number header. */ | |
5b7c81bd | 2521 | subseg_set (subseg_get (".debug_line_end", false), 0); |
b40bf0a2 | 2522 | |
e2b9a97e | 2523 | symbol_set_value_now (line_end); |
220e750f RH |
2524 | } |
2525 | ||
802f5d9e | 2526 | static void |
bdd3b953 | 2527 | out_debug_ranges (segT ranges_seg, symbolS **ranges_sym) |
802f5d9e NC |
2528 | { |
2529 | unsigned int addr_size = sizeof_address; | |
2530 | struct line_seg *s; | |
91d6fa6a | 2531 | expressionS exp; |
802f5d9e NC |
2532 | unsigned int i; |
2533 | ||
031e3350 | 2534 | memset (&exp, 0, sizeof exp); |
802f5d9e NC |
2535 | subseg_set (ranges_seg, 0); |
2536 | ||
bdd3b953 MW |
2537 | /* For DW_AT_ranges to point at (there is no header, so really start |
2538 | of section, but see out_debug_rnglists). */ | |
2539 | *ranges_sym = symbol_temp_new_now_octets (); | |
2540 | ||
802f5d9e | 2541 | /* Base Address Entry. */ |
7fd3924a | 2542 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2543 | out_byte (0xff); |
7fd3924a | 2544 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2545 | out_byte (0); |
2546 | ||
2547 | /* Range List Entry. */ | |
2548 | for (s = all_segs; s; s = s->next) | |
2549 | { | |
2550 | fragS *frag; | |
2551 | symbolS *beg, *end; | |
2552 | ||
2553 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2554 | beg = symbol_temp_new (s->seg, frag, 0); |
802f5d9e NC |
2555 | s->text_start = beg; |
2556 | ||
2557 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2558 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
802f5d9e NC |
2559 | s->text_end = end; |
2560 | ||
91d6fa6a NC |
2561 | exp.X_op = O_symbol; |
2562 | exp.X_add_symbol = beg; | |
2563 | exp.X_add_number = 0; | |
2564 | emit_expr (&exp, addr_size); | |
802f5d9e | 2565 | |
91d6fa6a NC |
2566 | exp.X_op = O_symbol; |
2567 | exp.X_add_symbol = end; | |
2568 | exp.X_add_number = 0; | |
2569 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
2570 | } |
2571 | ||
2572 | /* End of Range Entry. */ | |
7fd3924a | 2573 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2574 | out_byte (0); |
7fd3924a | 2575 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2576 | out_byte (0); |
2577 | } | |
2578 | ||
bdd3b953 MW |
2579 | static void |
2580 | out_debug_rnglists (segT ranges_seg, symbolS **ranges_sym) | |
2581 | { | |
2582 | expressionS exp; | |
2583 | symbolS *ranges_end; | |
2584 | struct line_seg *s; | |
2585 | ||
2586 | /* Unit length. */ | |
2587 | memset (&exp, 0, sizeof exp); | |
2588 | out_header (ranges_seg, &exp); | |
2589 | ranges_end = exp.X_add_symbol; | |
2590 | ||
2591 | out_two (DWARF2_RNGLISTS_VERSION); | |
2592 | out_byte (sizeof_address); | |
2593 | out_byte (0); /* Segment Selector size. */ | |
2594 | out_four (0); /* Offset entry count. */ | |
2595 | ||
2596 | /* For DW_AT_ranges to point at (must be after the header). */ | |
2597 | *ranges_sym = symbol_temp_new_now_octets (); | |
2598 | ||
2599 | for (s = all_segs; s; s = s->next) | |
2600 | { | |
2601 | fragS *frag; | |
2602 | symbolS *beg, *end; | |
2603 | ||
2604 | out_byte (DW_RLE_start_length); | |
2605 | ||
2606 | frag = first_frag_for_seg (s->seg); | |
2607 | beg = symbol_temp_new (s->seg, frag, 0); | |
2608 | s->text_start = beg; | |
2609 | ||
2610 | frag = last_frag_for_seg (s->seg); | |
2611 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); | |
2612 | s->text_end = end; | |
2613 | ||
2614 | exp.X_op = O_symbol; | |
2615 | exp.X_add_symbol = beg; | |
2616 | exp.X_add_number = 0; | |
2617 | emit_expr (&exp, sizeof_address); | |
2618 | ||
2619 | exp.X_op = O_symbol; | |
2620 | exp.X_add_symbol = end; | |
2621 | exp.X_add_number = 0; | |
2622 | emit_leb128_expr (&exp, 0); | |
2623 | } | |
2624 | ||
2625 | out_byte (DW_RLE_end_of_list); | |
2626 | ||
2627 | symbol_set_value_now (ranges_end); | |
2628 | } | |
2629 | ||
220e750f RH |
2630 | /* Emit data for .debug_aranges. */ |
2631 | ||
58b5739a | 2632 | static void |
a2e22468 | 2633 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 2634 | { |
220e750f | 2635 | unsigned int addr_size = sizeof_address; |
d025d5e5 | 2636 | offsetT size; |
220e750f | 2637 | struct line_seg *s; |
91d6fa6a | 2638 | expressionS exp; |
413a266c | 2639 | symbolS *aranges_end; |
220e750f | 2640 | char *p; |
413a266c | 2641 | int sizeof_offset; |
fac0d250 | 2642 | |
031e3350 | 2643 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2644 | sizeof_offset = out_header (aranges_seg, &exp); |
2645 | aranges_end = exp.X_add_symbol; | |
d025d5e5 | 2646 | size = -exp.X_add_number; |
fac0d250 | 2647 | |
220e750f | 2648 | /* Version. */ |
88ebb0a1 | 2649 | out_two (DWARF2_ARANGES_VERSION); |
d025d5e5 | 2650 | size += 2; |
4dc7ead9 | 2651 | |
220e750f | 2652 | /* Offset to .debug_info. */ |
413a266c | 2653 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
d025d5e5 | 2654 | size += sizeof_offset; |
220e750f RH |
2655 | |
2656 | /* Size of an address (offset portion). */ | |
2657 | out_byte (addr_size); | |
d025d5e5 | 2658 | size++; |
220e750f RH |
2659 | |
2660 | /* Size of a segment descriptor. */ | |
2661 | out_byte (0); | |
d025d5e5 | 2662 | size++; |
220e750f RH |
2663 | |
2664 | /* Align the header. */ | |
d025d5e5 MW |
2665 | while ((size++ % (2 * addr_size)) > 0) |
2666 | out_byte (0); | |
4dc7ead9 | 2667 | |
ee515fb7 | 2668 | for (s = all_segs; s; s = s->next) |
220e750f RH |
2669 | { |
2670 | fragS *frag; | |
2671 | symbolS *beg, *end; | |
2672 | ||
2673 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2674 | beg = symbol_temp_new (s->seg, frag, 0); |
220e750f RH |
2675 | s->text_start = beg; |
2676 | ||
2677 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2678 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
220e750f RH |
2679 | s->text_end = end; |
2680 | ||
91d6fa6a NC |
2681 | exp.X_op = O_symbol; |
2682 | exp.X_add_symbol = beg; | |
2683 | exp.X_add_number = 0; | |
2684 | emit_expr (&exp, addr_size); | |
220e750f | 2685 | |
91d6fa6a NC |
2686 | exp.X_op = O_subtract; |
2687 | exp.X_add_symbol = end; | |
2688 | exp.X_op_symbol = beg; | |
2689 | exp.X_add_number = 0; | |
2690 | emit_expr (&exp, addr_size); | |
220e750f | 2691 | } |
4dc7ead9 | 2692 | |
220e750f RH |
2693 | p = frag_more (2 * addr_size); |
2694 | md_number_to_chars (p, 0, addr_size); | |
2695 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c | 2696 | |
e2b9a97e | 2697 | symbol_set_value_now (aranges_end); |
4dc7ead9 RH |
2698 | } |
2699 | ||
220e750f RH |
2700 | /* Emit data for .debug_abbrev. Note that this must be kept in |
2701 | sync with out_debug_info below. */ | |
fac0d250 | 2702 | |
220e750f | 2703 | static void |
413a266c AM |
2704 | out_debug_abbrev (segT abbrev_seg, |
2705 | segT info_seg ATTRIBUTE_UNUSED, | |
591cc9fb JB |
2706 | segT line_seg ATTRIBUTE_UNUSED, |
2707 | unsigned char *func_formP) | |
220e750f | 2708 | { |
dd216e07 | 2709 | int secoff_form; |
591cc9fb JB |
2710 | bool have_efunc = false, have_lfunc = false; |
2711 | ||
2712 | /* Check the symbol table for function symbols which also have their size | |
2713 | specified. */ | |
2714 | if (symbol_rootP) | |
2715 | { | |
2716 | symbolS *symp; | |
2717 | ||
2718 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2719 | { | |
2720 | /* A warning construct is a warning symbol followed by the | |
2721 | symbol warned about. Skip this and the following symbol. */ | |
2722 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
2723 | { | |
2724 | symp = symbol_next (symp); | |
2725 | if (!symp) | |
2726 | break; | |
2727 | continue; | |
2728 | } | |
2729 | ||
2730 | if (!S_IS_DEFINED (symp) || !S_IS_FUNCTION (symp)) | |
2731 | continue; | |
2732 | ||
2733 | #if defined (OBJ_ELF) /* || defined (OBJ_MAYBE_ELF) */ | |
2734 | if (S_GET_SIZE (symp) == 0) | |
2735 | { | |
2736 | if (!IS_ELF || symbol_get_obj (symp)->size == NULL) | |
2737 | continue; | |
2738 | } | |
2739 | #else | |
2740 | continue; | |
2741 | #endif | |
2742 | ||
2743 | if (S_IS_EXTERNAL (symp)) | |
2744 | have_efunc = true; | |
2745 | else | |
2746 | have_lfunc = true; | |
2747 | } | |
2748 | } | |
2749 | ||
220e750f | 2750 | subseg_set (abbrev_seg, 0); |
fac0d250 | 2751 | |
5578fbf6 | 2752 | out_uleb128 (GAS_ABBREV_COMP_UNIT); |
220e750f | 2753 | out_uleb128 (DW_TAG_compile_unit); |
591cc9fb | 2754 | out_byte (have_efunc || have_lfunc ? DW_CHILDREN_yes : DW_CHILDREN_no); |
dd216e07 MW |
2755 | if (DWARF2_VERSION < 4) |
2756 | { | |
2757 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) | |
2758 | secoff_form = DW_FORM_data4; | |
2759 | else | |
2760 | secoff_form = DW_FORM_data8; | |
2761 | } | |
413a266c | 2762 | else |
dd216e07 MW |
2763 | secoff_form = DW_FORM_sec_offset; |
2764 | out_abbrev (DW_AT_stmt_list, secoff_form); | |
220e750f | 2765 | if (all_segs->next == NULL) |
4dc7ead9 | 2766 | { |
220e750f | 2767 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
88ebb0a1 MW |
2768 | if (DWARF2_VERSION < 4) |
2769 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
2770 | else | |
6b9a135d | 2771 | out_abbrev (DW_AT_high_pc, DW_FORM_udata); |
220e750f | 2772 | } |
802f5d9e | 2773 | else |
dd216e07 | 2774 | out_abbrev (DW_AT_ranges, secoff_form); |
49fced12 MW |
2775 | out_abbrev (DW_AT_name, DW_FORM_strp); |
2776 | out_abbrev (DW_AT_comp_dir, DW_FORM_strp); | |
2777 | out_abbrev (DW_AT_producer, DW_FORM_strp); | |
220e750f RH |
2778 | out_abbrev (DW_AT_language, DW_FORM_data2); |
2779 | out_abbrev (0, 0); | |
a987bfc9 | 2780 | |
591cc9fb JB |
2781 | if (have_efunc || have_lfunc) |
2782 | { | |
5578fbf6 | 2783 | out_uleb128 (GAS_ABBREV_SUBPROG); |
591cc9fb JB |
2784 | out_uleb128 (DW_TAG_subprogram); |
2785 | out_byte (DW_CHILDREN_no); | |
2786 | out_abbrev (DW_AT_name, DW_FORM_strp); | |
2787 | if (have_efunc) | |
2788 | { | |
2789 | if (have_lfunc || DWARF2_VERSION < 4) | |
2790 | *func_formP = DW_FORM_flag; | |
2791 | else | |
2792 | *func_formP = DW_FORM_flag_present; | |
2793 | out_abbrev (DW_AT_external, *func_formP); | |
2794 | } | |
2795 | else | |
2796 | /* Any non-zero value other than DW_FORM_flag will do. */ | |
2797 | *func_formP = DW_FORM_block; | |
5578fbf6 NC |
2798 | |
2799 | /* PR 29517: Provide a return type for the function. */ | |
2800 | if (DWARF2_VERSION > 2) | |
2801 | out_abbrev (DW_AT_type, DW_FORM_ref_udata); | |
2802 | ||
591cc9fb JB |
2803 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
2804 | out_abbrev (DW_AT_high_pc, | |
2805 | DWARF2_VERSION < 4 ? DW_FORM_addr : DW_FORM_udata); | |
2806 | out_abbrev (0, 0); | |
5578fbf6 NC |
2807 | |
2808 | if (DWARF2_VERSION > 2) | |
2809 | { | |
2810 | /* PR 29517: We do not actually know the return type of these | |
2811 | functions, so provide an abbrev that uses DWARF's unspecified | |
2812 | type. */ | |
2813 | out_uleb128 (GAS_ABBREV_NO_TYPE); | |
2814 | out_uleb128 (DW_TAG_unspecified_type); | |
2815 | out_byte (DW_CHILDREN_no); | |
2816 | out_abbrev (0, 0); | |
2817 | } | |
591cc9fb JB |
2818 | } |
2819 | ||
a987bfc9 RH |
2820 | /* Terminate the abbreviations for this compilation unit. */ |
2821 | out_byte (0); | |
220e750f | 2822 | } |
4dc7ead9 | 2823 | |
220e750f | 2824 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 2825 | |
220e750f | 2826 | static void |
591cc9fb | 2827 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT str_seg, |
bdd3b953 | 2828 | symbolS *ranges_sym, symbolS *name_sym, |
591cc9fb JB |
2829 | symbolS *comp_dir_sym, symbolS *producer_sym, |
2830 | unsigned char func_form) | |
220e750f | 2831 | { |
91d6fa6a | 2832 | expressionS exp; |
220e750f | 2833 | symbolS *info_end; |
14e777e0 | 2834 | int sizeof_offset; |
4dc7ead9 | 2835 | |
031e3350 | 2836 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2837 | sizeof_offset = out_header (info_seg, &exp); |
2838 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 2839 | |
220e750f | 2840 | /* DWARF version. */ |
fc0eebac | 2841 | out_two (DWARF2_VERSION); |
4dc7ead9 | 2842 | |
a3b3e858 MW |
2843 | if (DWARF2_VERSION < 5) |
2844 | { | |
2845 | /* .debug_abbrev offset */ | |
2846 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2847 | } | |
2848 | else | |
2849 | { | |
2850 | /* unit (header) type */ | |
2851 | out_byte (DW_UT_compile); | |
2852 | } | |
4dc7ead9 | 2853 | |
220e750f RH |
2854 | /* Target address size. */ |
2855 | out_byte (sizeof_address); | |
fac0d250 | 2856 | |
a3b3e858 MW |
2857 | if (DWARF2_VERSION >= 5) |
2858 | { | |
2859 | /* .debug_abbrev offset */ | |
2860 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2861 | } | |
2862 | ||
220e750f | 2863 | /* DW_TAG_compile_unit DIE abbrev */ |
5578fbf6 | 2864 | out_uleb128 (GAS_ABBREV_COMP_UNIT); |
fac0d250 | 2865 | |
220e750f | 2866 | /* DW_AT_stmt_list */ |
413a266c AM |
2867 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
2868 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
2869 | ? 4 : 8)); | |
fac0d250 | 2870 | |
802f5d9e | 2871 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 2872 | if (all_segs->next == NULL) |
58b5739a | 2873 | { |
220e750f | 2874 | /* DW_AT_low_pc */ |
91d6fa6a NC |
2875 | exp.X_op = O_symbol; |
2876 | exp.X_add_symbol = all_segs->text_start; | |
2877 | exp.X_add_number = 0; | |
2878 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
2879 | |
2880 | /* DW_AT_high_pc */ | |
88ebb0a1 MW |
2881 | if (DWARF2_VERSION < 4) |
2882 | exp.X_op = O_symbol; | |
2883 | else | |
2884 | { | |
2885 | exp.X_op = O_subtract; | |
2886 | exp.X_op_symbol = all_segs->text_start; | |
2887 | } | |
91d6fa6a NC |
2888 | exp.X_add_symbol = all_segs->text_end; |
2889 | exp.X_add_number = 0; | |
6b9a135d MW |
2890 | if (DWARF2_VERSION < 4) |
2891 | emit_expr (&exp, sizeof_address); | |
2892 | else | |
2893 | emit_leb128_expr (&exp, 0); | |
58b5739a | 2894 | } |
802f5d9e NC |
2895 | else |
2896 | { | |
eb1fe072 NC |
2897 | /* This attribute is emitted if the code is disjoint. */ |
2898 | /* DW_AT_ranges. */ | |
bdd3b953 | 2899 | TC_DWARF2_EMIT_OFFSET (ranges_sym, sizeof_offset); |
802f5d9e | 2900 | } |
58b5739a | 2901 | |
49fced12 MW |
2902 | /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str |
2903 | setup in out_debug_str below. */ | |
2904 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2905 | TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset); | |
2906 | TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset); | |
2907 | ||
2908 | /* DW_AT_language. Yes, this is probably not really MIPS, but the | |
2909 | dwarf2 draft has no standard code for assembler. */ | |
2910 | out_two (DW_LANG_Mips_Assembler); | |
2911 | ||
591cc9fb JB |
2912 | if (func_form) |
2913 | { | |
2914 | symbolS *symp; | |
0ee31dff NC |
2915 | symbolS *no_type_tag; |
2916 | ||
2917 | if (DWARF2_VERSION > 2) | |
2918 | no_type_tag = symbol_make (".Ldebug_no_type_tag"); | |
2919 | else | |
2920 | no_type_tag = NULL; | |
591cc9fb JB |
2921 | |
2922 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2923 | { | |
2924 | const char *name; | |
2925 | size_t len; | |
d7abcbce | 2926 | expressionS size = { .X_op = O_constant }; |
591cc9fb JB |
2927 | |
2928 | /* Skip warning constructs (see above). */ | |
2929 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
2930 | { | |
2931 | symp = symbol_next (symp); | |
2932 | if (!symp) | |
2933 | break; | |
2934 | continue; | |
2935 | } | |
2936 | ||
2937 | if (!S_IS_DEFINED (symp) || !S_IS_FUNCTION (symp)) | |
2938 | continue; | |
2939 | ||
d7abcbce JB |
2940 | #if defined (OBJ_ELF) /* || defined (OBJ_MAYBE_ELF) */ |
2941 | size.X_add_number = S_GET_SIZE (symp); | |
2942 | if (size.X_add_number == 0 && IS_ELF | |
2943 | && symbol_get_obj (symp)->size != NULL) | |
2944 | { | |
2945 | size.X_op = O_add; | |
2946 | size.X_op_symbol = make_expr_symbol (symbol_get_obj (symp)->size); | |
2947 | } | |
2948 | #endif | |
2949 | if (size.X_op == O_constant && size.X_add_number == 0) | |
2950 | continue; | |
2951 | ||
591cc9fb JB |
2952 | subseg_set (str_seg, 0); |
2953 | name_sym = symbol_temp_new_now_octets (); | |
2954 | name = S_GET_NAME (symp); | |
2955 | len = strlen (name) + 1; | |
2956 | memcpy (frag_more (len), name, len); | |
2957 | ||
2958 | subseg_set (info_seg, 0); | |
2959 | ||
2960 | /* DW_TAG_subprogram DIE abbrev */ | |
5578fbf6 | 2961 | out_uleb128 (GAS_ABBREV_SUBPROG); |
591cc9fb JB |
2962 | |
2963 | /* DW_AT_name */ | |
2964 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2965 | ||
2966 | /* DW_AT_external. */ | |
2967 | if (func_form == DW_FORM_flag) | |
2968 | out_byte (S_IS_EXTERNAL (symp)); | |
2969 | ||
0ee31dff NC |
2970 | /* PR 29517: Let consumers know that we do not have |
2971 | return type information for this function. */ | |
5578fbf6 | 2972 | if (DWARF2_VERSION > 2) |
0ee31dff NC |
2973 | { |
2974 | exp.X_op = O_symbol; | |
2975 | exp.X_add_symbol = no_type_tag; | |
2976 | exp.X_add_number = 0; | |
2977 | emit_leb128_expr (&exp, 0); | |
2978 | } | |
5578fbf6 | 2979 | |
591cc9fb JB |
2980 | /* DW_AT_low_pc */ |
2981 | exp.X_op = O_symbol; | |
2982 | exp.X_add_symbol = symp; | |
2983 | exp.X_add_number = 0; | |
2984 | emit_expr (&exp, sizeof_address); | |
2985 | ||
2986 | /* DW_AT_high_pc */ | |
591cc9fb JB |
2987 | if (DWARF2_VERSION < 4) |
2988 | { | |
d7abcbce JB |
2989 | if (size.X_op == O_constant) |
2990 | size.X_op = O_symbol; | |
2991 | size.X_add_symbol = symp; | |
2992 | emit_expr (&size, sizeof_address); | |
591cc9fb | 2993 | } |
d7abcbce JB |
2994 | else if (size.X_op == O_constant) |
2995 | out_uleb128 (size.X_add_number); | |
591cc9fb | 2996 | else |
d7abcbce | 2997 | emit_leb128_expr (symbol_get_value_expression (size.X_op_symbol), 0); |
591cc9fb JB |
2998 | } |
2999 | ||
0ee31dff NC |
3000 | if (DWARF2_VERSION > 2) |
3001 | { | |
3002 | /* PR 29517: Generate a DIE for the unspecified type abbrev. | |
3003 | We do it here because it cannot be part of the top level DIE. */ | |
3004 | subseg_set (info_seg, 0); | |
3005 | symbol_set_value_now (no_type_tag); | |
3006 | out_uleb128 (GAS_ABBREV_NO_TYPE); | |
3007 | } | |
3008 | ||
591cc9fb JB |
3009 | /* End of children. */ |
3010 | out_leb128 (0); | |
3011 | } | |
3012 | ||
e2b9a97e | 3013 | symbol_set_value_now (info_end); |
49fced12 MW |
3014 | } |
3015 | ||
3016 | /* Emit the three debug strings needed in .debug_str and setup symbols | |
3017 | to them for use in out_debug_info. */ | |
3018 | static void | |
3019 | out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym, | |
3020 | symbolS **producer_sym) | |
3021 | { | |
3022 | char producer[128]; | |
49fced12 MW |
3023 | char *p; |
3024 | int len; | |
5496f3c6 | 3025 | int first_file = DWARF2_LINE_VERSION > 4 ? 0 : 1; |
49fced12 MW |
3026 | |
3027 | subseg_set (str_seg, 0); | |
3028 | ||
48b91938 | 3029 | /* DW_AT_name. We don't have the actual file name that was present |
5496f3c6 | 3030 | on the command line, so assume files[first_file] is the main input file. |
48b91938 RH |
3031 | We're not supposed to get called unless at least one line number |
3032 | entry was emitted, so this should always be defined. */ | |
5c4e5fe6 | 3033 | *name_sym = symbol_temp_new_now_octets (); |
7fd3924a | 3034 | if (files_in_use == 0) |
48b91938 | 3035 | abort (); |
5496f3c6 | 3036 | if (files[first_file].dir) |
a7ed1ca2 | 3037 | { |
82cb2524 | 3038 | char *dirname = remap_debug_filename (dirs[files[first_file].dir]); |
3d6b762c | 3039 | len = strlen (dirname); |
198f1251 TG |
3040 | #ifdef TE_VMS |
3041 | /* Already has trailing slash. */ | |
3042 | p = frag_more (len); | |
3043 | memcpy (p, dirname, len); | |
3044 | #else | |
a7ed1ca2 | 3045 | p = frag_more (len + 1); |
3d6b762c | 3046 | memcpy (p, dirname, len); |
56487c55 | 3047 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 3048 | #endif |
82cb2524 | 3049 | free (dirname); |
a7ed1ca2 | 3050 | } |
5496f3c6 | 3051 | len = strlen (files[first_file].filename) + 1; |
48b91938 | 3052 | p = frag_more (len); |
5496f3c6 | 3053 | memcpy (p, files[first_file].filename, len); |
48b91938 | 3054 | |
220e750f | 3055 | /* DW_AT_comp_dir */ |
5c4e5fe6 | 3056 | *comp_dir_sym = symbol_temp_new_now_octets (); |
82cb2524 | 3057 | char *comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
3058 | len = strlen (comp_dir) + 1; |
3059 | p = frag_more (len); | |
3060 | memcpy (p, comp_dir, len); | |
82cb2524 | 3061 | free (comp_dir); |
fac0d250 | 3062 | |
220e750f | 3063 | /* DW_AT_producer */ |
5c4e5fe6 | 3064 | *producer_sym = symbol_temp_new_now_octets (); |
220e750f RH |
3065 | sprintf (producer, "GNU AS %s", VERSION); |
3066 | len = strlen (producer) + 1; | |
3067 | p = frag_more (len); | |
3068 | memcpy (p, producer, len); | |
fac0d250 RH |
3069 | } |
3070 | ||
1e9cc1c2 NC |
3071 | void |
3072 | dwarf2_init (void) | |
3073 | { | |
82cb2524 | 3074 | all_segs = NULL; |
1e9cc1c2 | 3075 | last_seg_ptr = &all_segs; |
82cb2524 AM |
3076 | files = NULL; |
3077 | files_in_use = 0; | |
3078 | files_allocated = 0; | |
3079 | dirs = NULL; | |
3080 | dirs_in_use = 0; | |
3081 | dirs_allocated = 0; | |
3082 | dwarf2_loc_directive_seen = false; | |
3083 | dwarf2_any_loc_directive_seen = false; | |
3084 | dwarf2_loc_mark_labels = false; | |
3085 | current.filenum = 1; | |
3086 | current.line = 1; | |
3087 | current.column = 0; | |
3088 | current.isa = 0; | |
3089 | current.flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
3090 | current.discriminator = 0; | |
3091 | current.u.view = NULL; | |
3092 | force_reset_view = NULL; | |
3093 | view_assert_failed = NULL; | |
a2aee680 AM |
3094 | dw2_line = -1; |
3095 | dw2_filename = NULL; | |
3096 | label_num = 0; | |
3097 | last_used = -1; | |
0ac2b354 AB |
3098 | |
3099 | /* Select the default CIE version to produce here. The global | |
3100 | starts with a value of -1 and will be modified to a valid value | |
3101 | either by the user providing a command line option, or some | |
3102 | targets will select their own default in md_after_parse_args. If | |
3103 | we get here and the global still contains -1 then it is up to us | |
3104 | to pick a sane default. The default we choose is 1, this is the | |
3105 | CIE version gas has produced for a long time, and there seems no | |
3106 | reason to change it yet. */ | |
3107 | if (flag_dwarf_cie_version == -1) | |
3108 | flag_dwarf_cie_version = 1; | |
1e9cc1c2 NC |
3109 | } |
3110 | ||
82cb2524 AM |
3111 | static void |
3112 | dwarf2_cleanup (void) | |
3113 | { | |
3114 | purge_generated_debug (true); | |
3115 | free (files); | |
d437724a AM |
3116 | for (unsigned int i = 0; i < dirs_in_use; i++) |
3117 | free (dirs[i]); | |
82cb2524 AM |
3118 | free (dirs); |
3119 | } | |
3120 | ||
c6cb92c5 | 3121 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
edc7a80a | 3122 | were any .file/.loc directives, or --gdwarf2 was given, and if the |
df1c40a7 L |
3123 | file has a non-empty .debug_info section and an empty .debug_line |
3124 | section. If we emit .debug_line, and the .debug_info section is | |
3125 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
3126 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
3127 | or --gdwarf2 was given and there were any located instructions | |
3128 | emitted. */ | |
c6cb92c5 | 3129 | |
fac0d250 | 3130 | void |
a2e22468 | 3131 | dwarf2_finish (void) |
fac0d250 | 3132 | { |
220e750f RH |
3133 | segT line_seg; |
3134 | struct line_seg *s; | |
c6cb92c5 NS |
3135 | segT info_seg; |
3136 | int emit_other_sections = 0; | |
df1c40a7 | 3137 | int empty_debug_line = 0; |
c6cb92c5 NS |
3138 | |
3139 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
3140 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 3141 | |
df1c40a7 L |
3142 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
3143 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
3144 | ||
3145 | /* We can't construct a new debug_line section if we already have one. | |
edc7a80a MW |
3146 | Give an error if we have seen any .loc, otherwise trust the user |
3147 | knows what they are doing and want to generate the .debug_line | |
3148 | (and all other debug sections) themselves. */ | |
3149 | if (all_segs && !empty_debug_line && dwarf2_any_loc_directive_seen) | |
df1c40a7 L |
3150 | as_fatal ("duplicate .debug_line sections"); |
3151 | ||
3152 | if ((!all_segs && emit_other_sections) | |
3153 | || (!emit_other_sections && !empty_debug_line)) | |
3154 | /* If there is no line information and no non-empty .debug_info | |
3155 | section, or if there is both a non-empty .debug_info and a non-empty | |
3156 | .debug_line, then we do nothing. */ | |
82cb2524 AM |
3157 | { |
3158 | dwarf2_cleanup (); | |
3159 | return; | |
3160 | } | |
fac0d250 | 3161 | |
220e750f | 3162 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 3163 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 3164 | |
220e750f | 3165 | /* Create and switch to the line number section. */ |
edc7a80a MW |
3166 | if (empty_debug_line) |
3167 | { | |
3168 | line_seg = subseg_new (".debug_line", 0); | |
3169 | bfd_set_section_flags (line_seg, | |
3170 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
3171 | } | |
fac0d250 | 3172 | |
5b484628 AM |
3173 | for (s = all_segs; s; s = s->next) |
3174 | { | |
3175 | struct line_subseg *lss; | |
3176 | ||
3177 | for (lss = s->head; lss; lss = lss->next) | |
3178 | if (lss->head) | |
3179 | do_allocate_filenum (lss->head); | |
3180 | } | |
3181 | ||
220e750f | 3182 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 3183 | for (s = all_segs; s; s = s->next) |
fac0d250 | 3184 | { |
91d6fa6a NC |
3185 | struct line_subseg *lss = s->head; |
3186 | struct line_entry **ptail = lss->ptail; | |
220e750f | 3187 | |
62e6b7b3 AO |
3188 | /* Reset the initial view of the first subsection of the |
3189 | section. */ | |
51298b33 | 3190 | if (lss->head && lss->head->loc.u.view) |
62e6b7b3 AO |
3191 | set_or_check_view (lss->head, NULL, NULL); |
3192 | ||
91d6fa6a | 3193 | while ((lss = lss->next) != NULL) |
220e750f | 3194 | { |
62e6b7b3 AO |
3195 | /* Link the first view of subsequent subsections to the |
3196 | previous view. */ | |
51298b33 | 3197 | if (lss->head && lss->head->loc.u.view) |
62e6b7b3 AO |
3198 | set_or_check_view (lss->head, |
3199 | !s->head ? NULL : (struct line_entry *)ptail, | |
3200 | s->head ? s->head->head : NULL); | |
91d6fa6a | 3201 | *ptail = lss->head; |
82cb2524 | 3202 | lss->head = NULL; |
91d6fa6a | 3203 | ptail = lss->ptail; |
220e750f | 3204 | } |
fac0d250 | 3205 | } |
85a39694 | 3206 | |
edc7a80a MW |
3207 | if (empty_debug_line) |
3208 | out_debug_line (line_seg); | |
85a39694 | 3209 | |
c6cb92c5 | 3210 | /* If this is assembler generated line info, and there is no |
49fced12 MW |
3211 | debug_info already, we need .debug_info, .debug_abbrev and |
3212 | .debug_str sections as well. */ | |
c6cb92c5 | 3213 | if (emit_other_sections) |
220e750f RH |
3214 | { |
3215 | segT abbrev_seg; | |
220e750f | 3216 | segT aranges_seg; |
49fced12 | 3217 | segT str_seg; |
bdd3b953 | 3218 | symbolS *name_sym, *comp_dir_sym, *producer_sym, *ranges_sym; |
591cc9fb | 3219 | unsigned char func_form = 0; |
4dc7ead9 | 3220 | |
9c2799c2 | 3221 | gas_assert (all_segs); |
7fd3924a | 3222 | |
220e750f RH |
3223 | info_seg = subseg_new (".debug_info", 0); |
3224 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
3225 | aranges_seg = subseg_new (".debug_aranges", 0); | |
49fced12 | 3226 | str_seg = subseg_new (".debug_str", 0); |
ef99799a | 3227 | |
61826503 CE |
3228 | bfd_set_section_flags (info_seg, |
3229 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
3230 | bfd_set_section_flags (abbrev_seg, | |
3231 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
3232 | bfd_set_section_flags (aranges_seg, | |
3233 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
3234 | bfd_set_section_flags (str_seg, | |
3235 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
3236 | | SEC_MERGE | SEC_STRINGS); | |
49fced12 | 3237 | str_seg->entsize = 1; |
ef99799a | 3238 | |
ee515fb7 | 3239 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 3240 | |
802f5d9e | 3241 | if (all_segs->next == NULL) |
bdd3b953 | 3242 | ranges_sym = NULL; |
802f5d9e NC |
3243 | else |
3244 | { | |
bdd3b953 MW |
3245 | if (DWARF2_VERSION < 5) |
3246 | { | |
3247 | segT ranges_seg = subseg_new (".debug_ranges", 0); | |
3248 | bfd_set_section_flags (ranges_seg, (SEC_READONLY | |
3249 | | SEC_DEBUGGING | |
3250 | | SEC_OCTETS)); | |
3251 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
3252 | out_debug_ranges (ranges_seg, &ranges_sym); | |
3253 | } | |
3254 | else | |
3255 | { | |
3256 | segT rnglists_seg = subseg_new (".debug_rnglists", 0); | |
3257 | bfd_set_section_flags (rnglists_seg, (SEC_READONLY | |
3258 | | SEC_DEBUGGING | |
3259 | | SEC_OCTETS)); | |
3260 | out_debug_rnglists (rnglists_seg, &ranges_sym); | |
3261 | } | |
802f5d9e NC |
3262 | } |
3263 | ||
220e750f | 3264 | out_debug_aranges (aranges_seg, info_seg); |
591cc9fb | 3265 | out_debug_abbrev (abbrev_seg, info_seg, line_seg, &func_form); |
49fced12 | 3266 | out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym); |
591cc9fb JB |
3267 | out_debug_info (info_seg, abbrev_seg, line_seg, str_seg, |
3268 | ranges_sym, name_sym, comp_dir_sym, producer_sym, | |
3269 | func_form); | |
220e750f | 3270 | } |
82cb2524 | 3271 | dwarf2_cleanup (); |
85a39694 | 3272 | } |
ba8826a8 AO |
3273 | |
3274 | /* Perform any deferred checks pertaining to debug information. */ | |
3275 | ||
3276 | void | |
3277 | dwarf2dbg_final_check (void) | |
3278 | { | |
3279 | /* Perform reset-view checks. Don't evaluate view_assert_failed | |
3280 | recursively: it could be very deep. It's a chain of adds, with | |
3281 | each chain element pointing to the next in X_add_symbol, and | |
3282 | holding the check value in X_op_symbol. */ | |
3283 | while (view_assert_failed) | |
3284 | { | |
723dfee7 | 3285 | expressionS *exp; |
ba8826a8 AO |
3286 | symbolS *sym; |
3287 | offsetT failed; | |
3288 | ||
3289 | gas_assert (!symbol_resolved_p (view_assert_failed)); | |
3290 | ||
723dfee7 | 3291 | exp = symbol_get_value_expression (view_assert_failed); |
ba8826a8 AO |
3292 | sym = view_assert_failed; |
3293 | ||
3294 | /* If view_assert_failed looks like a compound check in the | |
3295 | chain, break it up. */ | |
723dfee7 | 3296 | if (exp->X_op == O_add && exp->X_add_number == 0 && exp->X_unsigned) |
ba8826a8 | 3297 | { |
723dfee7 HPN |
3298 | view_assert_failed = exp->X_add_symbol; |
3299 | sym = exp->X_op_symbol; | |
ba8826a8 AO |
3300 | } |
3301 | else | |
3302 | view_assert_failed = NULL; | |
3303 | ||
3304 | failed = resolve_symbol_value (sym); | |
3305 | if (!symbol_resolved_p (sym) || failed) | |
3306 | { | |
3307 | as_bad (_("view number mismatch")); | |
3308 | break; | |
3309 | } | |
3310 | } | |
3311 | } |