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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
250d07de | 2 | Copyright (C) 1999-2021 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 CC |
27 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] \ |
28 | [discriminator 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 | ||
8acbe8ff | 89 | /* This implementation outputs version 3 .debug_line information. */ |
88ebb0a1 | 90 | #ifndef DWARF2_LINE_VERSION |
5496f3c6 | 91 | #define DWARF2_LINE_VERSION (dwarf_level > 3 ? dwarf_level : 3) |
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 RH |
121 | out_debug_line(). */ |
122 | #define DWARF2_LINE_OPCODE_BASE 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 | ||
ba8826a8 AO |
163 | struct line_entry |
164 | { | |
220e750f | 165 | struct line_entry *next; |
07a53e5c | 166 | symbolS *label; |
220e750f | 167 | struct dwarf2_line_info loc; |
e6c774b4 | 168 | }; |
fac0d250 | 169 | |
ba8826a8 AO |
170 | /* Don't change the offset of next in line_entry. set_or_check_view |
171 | calls in dwarf2_gen_line_info_1 depend on it. */ | |
172 | static char unused[offsetof(struct line_entry, next) ? -1 : 1] | |
173 | ATTRIBUTE_UNUSED; | |
174 | ||
175 | struct line_subseg | |
176 | { | |
220e750f RH |
177 | struct line_subseg *next; |
178 | subsegT subseg; | |
179 | struct line_entry *head; | |
180 | struct line_entry **ptail; | |
e410add4 | 181 | struct line_entry **pmove_tail; |
220e750f | 182 | }; |
353e2c69 | 183 | |
ba8826a8 AO |
184 | struct line_seg |
185 | { | |
220e750f RH |
186 | struct line_seg *next; |
187 | segT seg; | |
188 | struct line_subseg *head; | |
189 | symbolS *text_start; | |
190 | symbolS *text_end; | |
191 | }; | |
192 | ||
193 | /* Collects data for all line table entries during assembly. */ | |
194 | static struct line_seg *all_segs; | |
1e9cc1c2 | 195 | static struct line_seg **last_seg_ptr; |
220e750f | 196 | |
5496f3c6 NC |
197 | #define NUM_MD5_BYTES 16 |
198 | ||
ba8826a8 AO |
199 | struct file_entry |
200 | { | |
5496f3c6 NC |
201 | const char * filename; |
202 | unsigned int dir; | |
203 | unsigned char md5[NUM_MD5_BYTES]; | |
220e750f RH |
204 | }; |
205 | ||
206 | /* Table of files used by .debug_line. */ | |
207 | static struct file_entry *files; | |
208 | static unsigned int files_in_use; | |
209 | static unsigned int files_allocated; | |
210 | ||
a7ed1ca2 | 211 | /* Table of directories used by .debug_line. */ |
5496f3c6 NC |
212 | static char ** dirs = NULL; |
213 | static unsigned int dirs_in_use = 0; | |
214 | static unsigned int dirs_allocated = 0; | |
a7ed1ca2 | 215 | |
b34976b6 | 216 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
edc7a80a MW |
217 | doing work when there's nothing to do. Will be reset by |
218 | dwarf2_consume_line_info. */ | |
5b7c81bd | 219 | bool dwarf2_loc_directive_seen; |
220e750f | 220 | |
edc7a80a MW |
221 | /* TRUE when we've seen any .loc directive at any time during parsing. |
222 | Indicates the user wants us to generate a .debug_line section. | |
223 | Used in dwarf2_finish as sanity check. */ | |
5b7c81bd | 224 | static bool dwarf2_any_loc_directive_seen; |
edc7a80a | 225 | |
07a53e5c RH |
226 | /* TRUE when we're supposed to set the basic block mark whenever a |
227 | label is seen. */ | |
5b7c81bd | 228 | bool dwarf2_loc_mark_labels; |
07a53e5c | 229 | |
220e750f | 230 | /* Current location as indicated by the most recent .loc directive. */ |
ba8826a8 AO |
231 | static struct dwarf2_line_info current = |
232 | { | |
bd0eb99b | 233 | 1, 1, 0, 0, |
92846e72 | 234 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
51298b33 | 235 | 0, { NULL } |
bd0eb99b | 236 | }; |
220e750f | 237 | |
ba8826a8 AO |
238 | /* This symbol is used to recognize view number forced resets in loc |
239 | lists. */ | |
240 | static symbolS *force_reset_view; | |
241 | ||
242 | /* This symbol evaluates to an expression that, if nonzero, indicates | |
243 | some view assert check failed. */ | |
244 | static symbolS *view_assert_failed; | |
245 | ||
220e750f RH |
246 | /* The size of an address on the target. */ |
247 | static unsigned int sizeof_address; | |
248 | \f | |
c5c0a210 | 249 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 250 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 251 | |
6174d9c8 RH |
252 | /* Create an offset to .dwarf2_*. */ |
253 | ||
254 | static void | |
a2e22468 | 255 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 256 | { |
91d6fa6a | 257 | expressionS exp; |
6174d9c8 | 258 | |
031e3350 | 259 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
260 | exp.X_op = O_symbol; |
261 | exp.X_add_symbol = symbol; | |
262 | exp.X_add_number = 0; | |
263 | emit_expr (&exp, size); | |
6174d9c8 | 264 | } |
c5c0a210 | 265 | #endif |
6174d9c8 | 266 | |
e410add4 | 267 | /* Find or create (if CREATE_P) an entry for SEG+SUBSEG in ALL_SEGS. */ |
220e750f RH |
268 | |
269 | static struct line_subseg * | |
5b7c81bd | 270 | get_line_subseg (segT seg, subsegT subseg, bool create_p) |
220e750f | 271 | { |
5f3fd8b4 | 272 | struct line_seg *s = seg_info (seg)->dwarf2_line_seg; |
91d6fa6a | 273 | struct line_subseg **pss, *lss; |
fac0d250 | 274 | |
1e9cc1c2 NC |
275 | if (s == NULL) |
276 | { | |
e410add4 RS |
277 | if (!create_p) |
278 | return NULL; | |
279 | ||
325801bd | 280 | s = XNEW (struct line_seg); |
1e9cc1c2 NC |
281 | s->next = NULL; |
282 | s->seg = seg; | |
283 | s->head = NULL; | |
284 | *last_seg_ptr = s; | |
285 | last_seg_ptr = &s->next; | |
5f3fd8b4 | 286 | seg_info (seg)->dwarf2_line_seg = s; |
1e9cc1c2 | 287 | } |
5496f3c6 | 288 | |
1e9cc1c2 | 289 | gas_assert (seg == s->seg); |
220e750f | 290 | |
91d6fa6a | 291 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 292 | { |
91d6fa6a | 293 | if (lss->subseg == subseg) |
ee515fb7 | 294 | goto found_subseg; |
91d6fa6a | 295 | if (lss->subseg > subseg) |
220e750f | 296 | break; |
fac0d250 | 297 | } |
220e750f | 298 | |
325801bd | 299 | lss = XNEW (struct line_subseg); |
91d6fa6a NC |
300 | lss->next = *pss; |
301 | lss->subseg = subseg; | |
302 | lss->head = NULL; | |
303 | lss->ptail = &lss->head; | |
e410add4 | 304 | lss->pmove_tail = &lss->head; |
91d6fa6a | 305 | *pss = lss; |
220e750f RH |
306 | |
307 | found_subseg: | |
91d6fa6a | 308 | return lss; |
fac0d250 RH |
309 | } |
310 | ||
ba8826a8 AO |
311 | /* (Un)reverse the line_entry list starting from H. */ |
312 | ||
313 | static struct line_entry * | |
314 | reverse_line_entry_list (struct line_entry *h) | |
315 | { | |
316 | struct line_entry *p = NULL, *e, *n; | |
317 | ||
318 | for (e = h; e; e = n) | |
319 | { | |
320 | n = e->next; | |
321 | e->next = p; | |
322 | p = e; | |
323 | } | |
324 | return p; | |
325 | } | |
326 | ||
327 | /* Compute the view for E based on the previous entry P. If we | |
328 | introduce an (undefined) view symbol for P, and H is given (P must | |
329 | be the tail in this case), introduce view symbols for earlier list | |
330 | entries as well, until one of them is constant. */ | |
331 | ||
332 | static void | |
333 | set_or_check_view (struct line_entry *e, struct line_entry *p, | |
334 | struct line_entry *h) | |
335 | { | |
336 | expressionS viewx; | |
337 | ||
338 | memset (&viewx, 0, sizeof (viewx)); | |
339 | viewx.X_unsigned = 1; | |
340 | ||
341 | /* First, compute !(E->label > P->label), to tell whether or not | |
342 | we're to reset the view number. If we can't resolve it to a | |
343 | constant, keep it symbolic. */ | |
51298b33 | 344 | if (!p || (e->loc.u.view == force_reset_view && force_reset_view)) |
ba8826a8 AO |
345 | { |
346 | viewx.X_op = O_constant; | |
347 | viewx.X_add_number = 0; | |
348 | viewx.X_add_symbol = NULL; | |
349 | viewx.X_op_symbol = NULL; | |
350 | } | |
351 | else | |
352 | { | |
353 | viewx.X_op = O_gt; | |
354 | viewx.X_add_number = 0; | |
355 | viewx.X_add_symbol = e->label; | |
356 | viewx.X_op_symbol = p->label; | |
357 | resolve_expression (&viewx); | |
358 | if (viewx.X_op == O_constant) | |
359 | viewx.X_add_number = !viewx.X_add_number; | |
360 | else | |
361 | { | |
362 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
363 | viewx.X_add_number = 0; | |
364 | viewx.X_op_symbol = NULL; | |
365 | viewx.X_op = O_logical_not; | |
366 | } | |
367 | } | |
368 | ||
51298b33 | 369 | if (S_IS_DEFINED (e->loc.u.view) && symbol_constant_p (e->loc.u.view)) |
ba8826a8 | 370 | { |
51298b33 | 371 | expressionS *value = symbol_get_value_expression (e->loc.u.view); |
ba8826a8 AO |
372 | /* We can't compare the view numbers at this point, because in |
373 | VIEWX we've only determined whether we're to reset it so | |
374 | far. */ | |
375 | if (viewx.X_op == O_constant) | |
376 | { | |
377 | if (!value->X_add_number != !viewx.X_add_number) | |
378 | as_bad (_("view number mismatch")); | |
379 | } | |
380 | /* Record the expression to check it later. It is the result of | |
381 | a logical not, thus 0 or 1. We just add up all such deferred | |
382 | expressions, and resolve it at the end. */ | |
383 | else if (!value->X_add_number) | |
384 | { | |
385 | symbolS *deferred = make_expr_symbol (&viewx); | |
386 | if (view_assert_failed) | |
387 | { | |
388 | expressionS chk; | |
031e3350 | 389 | |
ba8826a8 AO |
390 | memset (&chk, 0, sizeof (chk)); |
391 | chk.X_unsigned = 1; | |
392 | chk.X_op = O_add; | |
393 | chk.X_add_number = 0; | |
394 | chk.X_add_symbol = view_assert_failed; | |
395 | chk.X_op_symbol = deferred; | |
396 | deferred = make_expr_symbol (&chk); | |
397 | } | |
398 | view_assert_failed = deferred; | |
399 | } | |
400 | } | |
401 | ||
402 | if (viewx.X_op != O_constant || viewx.X_add_number) | |
403 | { | |
404 | expressionS incv; | |
405 | ||
51298b33 | 406 | if (!p->loc.u.view) |
ba8826a8 | 407 | { |
51298b33 AM |
408 | p->loc.u.view = symbol_temp_make (); |
409 | gas_assert (!S_IS_DEFINED (p->loc.u.view)); | |
ba8826a8 AO |
410 | } |
411 | ||
412 | memset (&incv, 0, sizeof (incv)); | |
413 | incv.X_unsigned = 1; | |
414 | incv.X_op = O_symbol; | |
51298b33 | 415 | incv.X_add_symbol = p->loc.u.view; |
ba8826a8 AO |
416 | incv.X_add_number = 1; |
417 | ||
418 | if (viewx.X_op == O_constant) | |
419 | { | |
420 | gas_assert (viewx.X_add_number == 1); | |
421 | viewx = incv; | |
422 | } | |
423 | else | |
424 | { | |
425 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
426 | viewx.X_add_number = 0; | |
427 | viewx.X_op_symbol = make_expr_symbol (&incv); | |
428 | viewx.X_op = O_multiply; | |
429 | } | |
430 | } | |
431 | ||
51298b33 | 432 | if (!S_IS_DEFINED (e->loc.u.view)) |
ba8826a8 | 433 | { |
51298b33 AM |
434 | symbol_set_value_expression (e->loc.u.view, &viewx); |
435 | S_SET_SEGMENT (e->loc.u.view, expr_section); | |
436 | symbol_set_frag (e->loc.u.view, &zero_address_frag); | |
ba8826a8 AO |
437 | } |
438 | ||
439 | /* Define and attempt to simplify any earlier views needed to | |
440 | compute E's. */ | |
51298b33 | 441 | if (h && p && p->loc.u.view && !S_IS_DEFINED (p->loc.u.view)) |
ba8826a8 AO |
442 | { |
443 | struct line_entry *h2; | |
444 | /* Reverse the list to avoid quadratic behavior going backwards | |
445 | in a single-linked list. */ | |
446 | struct line_entry *r = reverse_line_entry_list (h); | |
447 | ||
448 | gas_assert (r == p); | |
449 | /* Set or check views until we find a defined or absent view. */ | |
450 | do | |
62e6b7b3 AO |
451 | { |
452 | /* Do not define the head of a (sub?)segment view while | |
453 | handling others. It would be defined too early, without | |
454 | regard to the last view of other subsegments. | |
455 | set_or_check_view will be called for every head segment | |
456 | that needs it. */ | |
457 | if (r == h) | |
458 | break; | |
459 | set_or_check_view (r, r->next, NULL); | |
460 | } | |
51298b33 AM |
461 | while (r->next |
462 | && r->next->loc.u.view | |
463 | && !S_IS_DEFINED (r->next->loc.u.view) | |
ba8826a8 AO |
464 | && (r = r->next)); |
465 | ||
466 | /* Unreverse the list, so that we can go forward again. */ | |
467 | h2 = reverse_line_entry_list (p); | |
468 | gas_assert (h2 == h); | |
469 | ||
470 | /* Starting from the last view we just defined, attempt to | |
471 | simplify the view expressions, until we do so to P. */ | |
472 | do | |
473 | { | |
62e6b7b3 AO |
474 | /* The head view of a subsegment may remain undefined while |
475 | handling other elements, before it is linked to the last | |
476 | view of the previous subsegment. */ | |
477 | if (r == h) | |
478 | continue; | |
51298b33 AM |
479 | gas_assert (S_IS_DEFINED (r->loc.u.view)); |
480 | resolve_expression (symbol_get_value_expression (r->loc.u.view)); | |
ba8826a8 AO |
481 | } |
482 | while (r != p && (r = r->next)); | |
483 | ||
484 | /* Now that we've defined and computed all earlier views that might | |
485 | be needed to compute E's, attempt to simplify it. */ | |
51298b33 | 486 | resolve_expression (symbol_get_value_expression (e->loc.u.view)); |
ba8826a8 AO |
487 | } |
488 | } | |
489 | ||
6a50d470 | 490 | /* Record an entry for LOC occurring at LABEL. */ |
07a53e5c RH |
491 | |
492 | static void | |
6a50d470 | 493 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) |
07a53e5c | 494 | { |
6a50d470 | 495 | struct line_subseg *lss; |
07a53e5c | 496 | struct line_entry *e; |
058430b4 | 497 | flagword need_flags = SEC_LOAD | SEC_CODE; |
bcb78b47 | 498 | |
058430b4 AM |
499 | /* PR 26850: Do not record LOCs in non-executable or non-loaded |
500 | sections. SEC_ALLOC isn't tested for non-ELF because obj-coff.c | |
501 | obj_coff_section is careless in setting SEC_ALLOC. */ | |
502 | if (IS_ELF) | |
503 | need_flags |= SEC_ALLOC; | |
bcb78b47 NC |
504 | if ((now_seg->flags & need_flags) != need_flags) |
505 | { | |
058430b4 | 506 | /* FIXME: Add code to suppress multiple warnings ? */ |
be07043e AM |
507 | if (debug_type != DEBUG_DWARF2) |
508 | as_warn ("dwarf line number information for %s ignored", | |
509 | segment_name (now_seg)); | |
bcb78b47 NC |
510 | return; |
511 | } | |
07a53e5c | 512 | |
325801bd | 513 | e = XNEW (struct line_entry); |
07a53e5c | 514 | e->next = NULL; |
6a50d470 | 515 | e->label = label; |
07a53e5c RH |
516 | e->loc = *loc; |
517 | ||
5b7c81bd | 518 | lss = get_line_subseg (now_seg, now_subseg, true); |
ba8826a8 | 519 | |
62e6b7b3 AO |
520 | /* Subseg heads are chained to previous subsegs in |
521 | dwarf2_finish. */ | |
51298b33 AM |
522 | if (loc->filenum != -1u && loc->u.view && lss->head) |
523 | set_or_check_view (e, (struct line_entry *) lss->ptail, lss->head); | |
ba8826a8 | 524 | |
6a50d470 RS |
525 | *lss->ptail = e; |
526 | lss->ptail = &e->next; | |
07a53e5c RH |
527 | } |
528 | ||
436d9e46 | 529 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 530 | |
220e750f | 531 | void |
a2e22468 | 532 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 533 | { |
6a50d470 RS |
534 | symbolS *sym; |
535 | ||
220e750f | 536 | /* Early out for as-yet incomplete location information. */ |
5496f3c6 NC |
537 | if (loc->line == 0) |
538 | return; | |
498ff032 | 539 | if (loc->filenum == 0) |
705989f1 | 540 | { |
498ff032 AM |
541 | if (dwarf_level < 5) |
542 | dwarf_level = 5; | |
705989f1 L |
543 | if (DWARF2_LINE_VERSION < 5) |
544 | return; | |
545 | } | |
220e750f | 546 | |
ffa554ed GK |
547 | /* Don't emit sequences of line symbols for the same line when the |
548 | symbols apply to assembler code. It is necessary to emit | |
549 | duplicate line symbols when a compiler asks for them, because GDB | |
550 | uses them to determine the end of the prologue. */ | |
51298b33 AM |
551 | if (debug_type == DEBUG_DWARF2) |
552 | { | |
553 | static unsigned int line = -1; | |
554 | static const char *filename = NULL; | |
555 | ||
556 | if (line == loc->line) | |
557 | { | |
558 | if (filename == loc->u.filename) | |
559 | return; | |
560 | if (filename_cmp (filename, loc->u.filename) == 0) | |
561 | { | |
562 | filename = loc->u.filename; | |
563 | return; | |
564 | } | |
565 | } | |
1ea5c325 | 566 | |
51298b33 AM |
567 | line = loc->line; |
568 | filename = loc->u.filename; | |
569 | } | |
1ea5c325 | 570 | |
453dc3f0 NC |
571 | if (linkrelax) |
572 | { | |
51298b33 AM |
573 | static int label_num = 0; |
574 | char name[32]; | |
453dc3f0 NC |
575 | |
576 | /* Use a non-fake name for the line number location, | |
577 | so that it can be referred to by relocations. */ | |
51298b33 AM |
578 | sprintf (name, ".Loc.%u", label_num); |
579 | label_num++; | |
e01e1cee | 580 | sym = symbol_new (name, now_seg, frag_now, ofs); |
453dc3f0 NC |
581 | } |
582 | else | |
e01e1cee | 583 | sym = symbol_temp_new (now_seg, frag_now, ofs); |
6a50d470 | 584 | dwarf2_gen_line_info_1 (sym, loc); |
220e750f | 585 | } |
fac0d250 | 586 | |
5496f3c6 NC |
587 | static const char * |
588 | get_basename (const char * pathname) | |
589 | { | |
590 | const char * file; | |
591 | ||
592 | file = lbasename (pathname); | |
593 | /* Don't make empty string from / or A: from A:/ . */ | |
594 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
595 | if (file <= pathname + 3) | |
596 | file = pathname; | |
597 | #else | |
598 | if (file == pathname + 1) | |
599 | file = pathname; | |
600 | #endif | |
601 | return file; | |
602 | } | |
603 | ||
604 | static unsigned int | |
5b7c81bd | 605 | get_directory_table_entry (const char *dirname, |
58f3b6a3 | 606 | const char *file0_dirname, |
5b7c81bd AM |
607 | size_t dirlen, |
608 | bool can_use_zero) | |
5496f3c6 NC |
609 | { |
610 | unsigned int d; | |
611 | ||
612 | if (dirlen == 0) | |
613 | return 0; | |
614 | ||
615 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR | |
616 | if (IS_DIR_SEPARATOR (dirname[dirlen - 1])) | |
617 | { | |
618 | -- dirlen; | |
619 | if (dirlen == 0) | |
620 | return 0; | |
621 | } | |
622 | #endif | |
623 | ||
624 | for (d = 0; d < dirs_in_use; ++d) | |
625 | { | |
626 | if (dirs[d] != NULL | |
627 | && filename_ncmp (dirname, dirs[d], dirlen) == 0 | |
628 | && dirs[d][dirlen] == '\0') | |
629 | return d; | |
630 | } | |
631 | ||
632 | if (can_use_zero) | |
633 | { | |
634 | if (dirs == NULL || dirs[0] == NULL) | |
3417bfca | 635 | { |
58f3b6a3 | 636 | const char * pwd = file0_dirname ? file0_dirname : getpwd (); |
3417bfca | 637 | |
51298b33 | 638 | if (dwarf_level >= 5 && filename_cmp (dirname, pwd) != 0) |
3417bfca | 639 | { |
51298b33 AM |
640 | /* In DWARF-5 the 0 entry in the directory table is |
641 | expected to be the same as the DW_AT_comp_dir (which | |
642 | is set to the current build directory). Since we are | |
643 | about to create a directory entry that is not the | |
644 | same, allocate the current directory first. | |
645 | FIXME: Alternatively we could generate an error | |
646 | message here. */ | |
58f3b6a3 L |
647 | (void) get_directory_table_entry (pwd, NULL, strlen (pwd), |
648 | true); | |
3417bfca NC |
649 | d = 1; |
650 | } | |
651 | else | |
652 | d = 0; | |
653 | } | |
5496f3c6 NC |
654 | } |
655 | else if (d == 0) | |
656 | d = 1; | |
657 | ||
658 | if (d >= dirs_allocated) | |
659 | { | |
660 | unsigned int old = dirs_allocated; | |
3417bfca NC |
661 | #define DIR_TABLE_INCREMENT 32 |
662 | dirs_allocated = d + DIR_TABLE_INCREMENT; | |
5496f3c6 NC |
663 | dirs = XRESIZEVEC (char *, dirs, dirs_allocated); |
664 | memset (dirs + old, 0, (dirs_allocated - old) * sizeof (char *)); | |
665 | } | |
666 | ||
667 | dirs[d] = xmemdup0 (dirname, dirlen); | |
668 | if (dirs_in_use <= d) | |
669 | dirs_in_use = d + 1; | |
670 | ||
671 | return d; | |
672 | } | |
673 | ||
5b7c81bd | 674 | static bool |
6915020b | 675 | assign_file_to_slot (unsigned long i, const char *file, unsigned int dir) |
714e6c96 NC |
676 | { |
677 | if (i >= files_allocated) | |
678 | { | |
679 | unsigned int old = files_allocated; | |
680 | ||
681 | files_allocated = i + 32; | |
682 | /* Catch wraparound. */ | |
683 | if (files_allocated <= old) | |
684 | { | |
685 | as_bad (_("file number %lu is too big"), (unsigned long) i); | |
5b7c81bd | 686 | return false; |
714e6c96 NC |
687 | } |
688 | ||
689 | files = XRESIZEVEC (struct file_entry, files, files_allocated); | |
690 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
691 | } | |
692 | ||
693 | files[i].filename = file; | |
694 | files[i].dir = dir; | |
714e6c96 NC |
695 | memset (files[i].md5, 0, NUM_MD5_BYTES); |
696 | ||
697 | if (files_in_use < i + 1) | |
698 | files_in_use = i + 1; | |
699 | ||
5b7c81bd | 700 | return true; |
714e6c96 NC |
701 | } |
702 | ||
5496f3c6 NC |
703 | /* Get a .debug_line file number for PATHNAME. If there is a |
704 | directory component to PATHNAME, then this will be stored | |
705 | in the directory table, if it is not already present. | |
706 | Returns the slot number allocated to that filename or -1 | |
707 | if there was a problem. */ | |
708 | ||
709 | static signed int | |
710 | allocate_filenum (const char * pathname) | |
711 | { | |
712 | static signed int last_used = -1, last_used_dir_len = 0; | |
713 | const char *file; | |
714 | size_t dir_len; | |
715 | unsigned int i, dir; | |
716 | ||
717 | /* Short circuit the common case of adding the same pathname | |
718 | as last time. */ | |
719 | if (last_used != -1) | |
720 | { | |
721 | const char * dirname = NULL; | |
722 | ||
723 | if (dirs != NULL) | |
724 | dirname = dirs[files[last_used].dir]; | |
725 | ||
726 | if (dirname == NULL) | |
727 | { | |
728 | if (filename_cmp (pathname, files[last_used].filename) == 0) | |
729 | return last_used; | |
730 | } | |
731 | else | |
732 | { | |
d4673354 AM |
733 | if (filename_ncmp (pathname, dirname, last_used_dir_len - 1) == 0 |
734 | && IS_DIR_SEPARATOR (pathname [last_used_dir_len - 1]) | |
735 | && filename_cmp (pathname + last_used_dir_len, | |
5496f3c6 NC |
736 | files[last_used].filename) == 0) |
737 | return last_used; | |
738 | } | |
739 | } | |
740 | ||
741 | file = get_basename (pathname); | |
742 | dir_len = file - pathname; | |
743 | ||
58f3b6a3 | 744 | dir = get_directory_table_entry (pathname, NULL, dir_len, false); |
5496f3c6 | 745 | |
714e6c96 | 746 | /* Do not use slot-0. That is specifically reserved for use by |
5496f3c6 NC |
747 | the '.file 0 "name"' directive. */ |
748 | for (i = 1; i < files_in_use; ++i) | |
749 | if (files[i].dir == dir | |
750 | && files[i].filename | |
751 | && filename_cmp (file, files[i].filename) == 0) | |
752 | { | |
753 | last_used = i; | |
754 | last_used_dir_len = dir_len; | |
755 | return i; | |
756 | } | |
757 | ||
6915020b | 758 | if (!assign_file_to_slot (i, file, dir)) |
714e6c96 | 759 | return -1; |
5496f3c6 | 760 | |
5496f3c6 NC |
761 | last_used = i; |
762 | last_used_dir_len = dir_len; | |
763 | ||
764 | return i; | |
765 | } | |
766 | ||
51298b33 AM |
767 | /* Run through the list of line entries starting at E, allocating |
768 | file entries for gas generated debug. */ | |
769 | ||
770 | static void | |
771 | do_allocate_filenum (struct line_entry *e) | |
772 | { | |
773 | do | |
774 | { | |
775 | if (e->loc.filenum == -1u) | |
776 | { | |
777 | e->loc.filenum = allocate_filenum (e->loc.u.filename); | |
778 | e->loc.u.view = NULL; | |
779 | } | |
780 | e = e->next; | |
781 | } | |
782 | while (e); | |
783 | } | |
784 | ||
ef9768e3 AM |
785 | /* Remove any generated line entries. These don't live comfortably |
786 | with compiler generated line info. */ | |
787 | ||
788 | static void | |
789 | purge_generated_debug (void) | |
790 | { | |
791 | struct line_seg *s; | |
792 | ||
793 | for (s = all_segs; s; s = s->next) | |
794 | { | |
5b484628 | 795 | struct line_subseg *lss; |
ef9768e3 | 796 | |
5b484628 | 797 | for (lss = s->head; lss; lss = lss->next) |
ef9768e3 | 798 | { |
5b484628 AM |
799 | struct line_entry *e, *next; |
800 | ||
801 | for (e = lss->head; e; e = next) | |
802 | { | |
803 | know (e->loc.filenum == -1u); | |
804 | next = e->next; | |
805 | free (e); | |
806 | } | |
ef9768e3 | 807 | |
5b484628 AM |
808 | lss->head = NULL; |
809 | lss->ptail = &lss->head; | |
810 | lss->pmove_tail = &lss->head; | |
811 | } | |
ef9768e3 AM |
812 | } |
813 | } | |
814 | ||
5496f3c6 NC |
815 | /* Allocate slot NUM in the .debug_line file table to FILENAME. |
816 | If DIRNAME is not NULL or there is a directory component to FILENAME | |
817 | then this will be stored in the directory table, if not already present. | |
818 | if WITH_MD5 is TRUE then there is a md5 value in generic_bignum. | |
819 | Returns TRUE if allocation succeeded, FALSE otherwise. */ | |
820 | ||
5b7c81bd AM |
821 | static bool |
822 | allocate_filename_to_slot (const char *dirname, | |
823 | const char *filename, | |
824 | unsigned int num, | |
825 | bool with_md5) | |
5496f3c6 NC |
826 | { |
827 | const char *file; | |
828 | size_t dirlen; | |
829 | unsigned int i, d; | |
58f3b6a3 | 830 | const char *file0_dirname = dirname; |
5496f3c6 NC |
831 | |
832 | /* Short circuit the common case of adding the same pathname | |
833 | as last time. */ | |
834 | if (num < files_allocated && files[num].filename != NULL) | |
835 | { | |
836 | const char * dir = NULL; | |
837 | ||
80b652ef | 838 | if (dirs != NULL) |
5496f3c6 NC |
839 | dir = dirs[files[num].dir]; |
840 | ||
841 | if (with_md5 | |
842 | && memcmp (generic_bignum, files[num].md5, NUM_MD5_BYTES) != 0) | |
843 | goto fail; | |
844 | ||
845 | if (dirname != NULL) | |
846 | { | |
847 | if (dir != NULL && filename_cmp (dir, dirname) != 0) | |
848 | goto fail; | |
849 | ||
850 | if (filename_cmp (filename, files[num].filename) != 0) | |
851 | goto fail; | |
852 | ||
853 | /* If the filenames match, but the directory table entry was | |
854 | empty, then fill it with the provided directory name. */ | |
855 | if (dir == NULL) | |
80b652ef NC |
856 | { |
857 | if (dirs == NULL) | |
858 | { | |
3417bfca | 859 | dirs_allocated = files[num].dir + DIR_TABLE_INCREMENT; |
80b652ef NC |
860 | dirs = XCNEWVEC (char *, dirs_allocated); |
861 | } | |
862 | ||
863 | dirs[files[num].dir] = xmemdup0 (dirname, strlen (dirname)); | |
864 | } | |
5496f3c6 | 865 | |
5b7c81bd | 866 | return true; |
5496f3c6 NC |
867 | } |
868 | else if (dir != NULL) | |
869 | { | |
870 | dirlen = strlen (dir); | |
871 | if (filename_ncmp (filename, dir, dirlen) == 0 | |
872 | && IS_DIR_SEPARATOR (filename [dirlen]) | |
873 | && filename_cmp (filename + dirlen + 1, files[num].filename) == 0) | |
5b7c81bd | 874 | return true; |
5496f3c6 NC |
875 | } |
876 | else /* dir == NULL */ | |
877 | { | |
878 | file = get_basename (filename); | |
879 | if (filename_cmp (file, files[num].filename) == 0) | |
880 | { | |
9a12b194 AM |
881 | /* The filenames match, but the directory table entry is empty. |
882 | Fill it with the provided directory name. */ | |
5496f3c6 | 883 | if (file > filename) |
9a12b194 AM |
884 | { |
885 | if (dirs == NULL) | |
886 | { | |
3417bfca | 887 | dirs_allocated = files[num].dir + DIR_TABLE_INCREMENT; |
9a12b194 AM |
888 | dirs = XCNEWVEC (char *, dirs_allocated); |
889 | } | |
890 | ||
891 | dirs[files[num].dir] = xmemdup0 (filename, file - filename); | |
892 | } | |
5b7c81bd | 893 | return true; |
5496f3c6 NC |
894 | } |
895 | } | |
896 | ||
897 | fail: | |
bd0c565e L |
898 | as_bad (_("file table slot %u is already occupied by a different file (%s%s%s vs %s%s%s)"), |
899 | num, | |
900 | dir == NULL ? "" : dir, | |
901 | dir == NULL ? "" : "/", | |
902 | files[num].filename, | |
903 | dirname == NULL ? "" : dirname, | |
904 | dirname == NULL ? "" : "/", | |
905 | filename); | |
5b7c81bd | 906 | return false; |
5496f3c6 NC |
907 | } |
908 | ||
909 | if (dirname == NULL) | |
910 | { | |
911 | dirname = filename; | |
912 | file = get_basename (filename); | |
913 | dirlen = file - filename; | |
914 | } | |
915 | else | |
916 | { | |
917 | dirlen = strlen (dirname); | |
918 | file = filename; | |
919 | } | |
3417bfca | 920 | |
58f3b6a3 L |
921 | d = get_directory_table_entry (dirname, file0_dirname, dirlen, |
922 | num == 0); | |
5496f3c6 NC |
923 | i = num; |
924 | ||
6915020b | 925 | if (! assign_file_to_slot (i, file, d)) |
5b7c81bd | 926 | return false; |
5496f3c6 | 927 | |
5496f3c6 NC |
928 | if (with_md5) |
929 | { | |
930 | if (target_big_endian) | |
931 | { | |
932 | /* md5's are stored in litte endian format. */ | |
933 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
934 | unsigned int byte = NUM_MD5_BYTES; | |
935 | unsigned int bignum_index = 0; | |
936 | ||
937 | while (bits_remaining) | |
938 | { | |
939 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
940 | valueT bignum_value = generic_bignum [bignum_index]; | |
941 | bignum_index ++; | |
942 | ||
943 | while (bignum_bits_remaining) | |
944 | { | |
945 | files[i].md5[--byte] = bignum_value & 0xff; | |
946 | bignum_value >>= 8; | |
947 | bignum_bits_remaining -= 8; | |
948 | bits_remaining -= 8; | |
949 | } | |
950 | } | |
951 | } | |
952 | else | |
953 | { | |
954 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
955 | unsigned int byte = 0; | |
956 | unsigned int bignum_index = 0; | |
957 | ||
958 | while (bits_remaining) | |
959 | { | |
960 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
961 | valueT bignum_value = generic_bignum [bignum_index]; | |
962 | ||
963 | bignum_index ++; | |
964 | ||
965 | while (bignum_bits_remaining) | |
966 | { | |
967 | files[i].md5[byte++] = bignum_value & 0xff; | |
968 | bignum_value >>= 8; | |
969 | bignum_bits_remaining -= 8; | |
970 | bits_remaining -= 8; | |
971 | } | |
972 | } | |
973 | } | |
974 | } | |
975 | else | |
976 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
977 | ||
5b7c81bd | 978 | return true; |
5496f3c6 NC |
979 | } |
980 | ||
ecea7679 RH |
981 | /* Returns the current source information. If .file directives have |
982 | been encountered, the info for the corresponding source file is | |
983 | returned. Otherwise, the info for the assembly source file is | |
984 | returned. */ | |
985 | ||
220e750f | 986 | void |
a2e22468 | 987 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
988 | { |
989 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 990 | { |
51298b33 AM |
991 | line->u.filename = as_where (&line->line); |
992 | line->filenum = -1u; | |
220e750f | 993 | line->column = 0; |
bd0eb99b | 994 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 995 | line->isa = current.isa; |
92846e72 | 996 | line->discriminator = current.discriminator; |
fac0d250 | 997 | } |
220e750f RH |
998 | else |
999 | *line = current; | |
fac0d250 RH |
1000 | } |
1001 | ||
7fd3924a | 1002 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
1003 | machine of isa changes when assembler debug info is enabled. */ |
1004 | ||
1005 | void | |
1006 | dwarf2_set_isa (unsigned int isa) | |
1007 | { | |
1008 | current.isa = isa; | |
1009 | } | |
1010 | ||
220e750f RH |
1011 | /* Called for each machine instruction, or relatively atomic group of |
1012 | machine instructions (ie built-in macro). The instruction or group | |
1013 | is SIZE bytes in length. If dwarf2 line number generation is called | |
1014 | for, emit a line statement appropriately. */ | |
353e2c69 | 1015 | |
220e750f | 1016 | void |
a2e22468 | 1017 | dwarf2_emit_insn (int size) |
fac0d250 | 1018 | { |
220e750f | 1019 | struct dwarf2_line_info loc; |
fac0d250 | 1020 | |
ba8826a8 AO |
1021 | if (debug_type != DEBUG_DWARF2 |
1022 | ? !dwarf2_loc_directive_seen | |
1023 | : !seen_at_least_1_file ()) | |
220e750f | 1024 | return; |
7fd3924a AM |
1025 | |
1026 | dwarf2_where (&loc); | |
b6675117 | 1027 | |
71250b94 | 1028 | dwarf2_gen_line_info ((frag_now_fix_octets () - size) / OCTETS_PER_BYTE, &loc); |
661ba50f BW |
1029 | dwarf2_consume_line_info (); |
1030 | } | |
1031 | ||
e410add4 RS |
1032 | /* Move all previously-emitted line entries for the current position by |
1033 | DELTA bytes. This function cannot be used to move the same entries | |
1034 | twice. */ | |
1035 | ||
1036 | void | |
1037 | dwarf2_move_insn (int delta) | |
1038 | { | |
1039 | struct line_subseg *lss; | |
1040 | struct line_entry *e; | |
1041 | valueT now; | |
1042 | ||
1043 | if (delta == 0) | |
1044 | return; | |
1045 | ||
5b7c81bd | 1046 | lss = get_line_subseg (now_seg, now_subseg, false); |
e410add4 RS |
1047 | if (!lss) |
1048 | return; | |
1049 | ||
1050 | now = frag_now_fix (); | |
1051 | while ((e = *lss->pmove_tail)) | |
1052 | { | |
1053 | if (S_GET_VALUE (e->label) == now) | |
1054 | S_SET_VALUE (e->label, now + delta); | |
1055 | lss->pmove_tail = &e->next; | |
1056 | } | |
1057 | } | |
1058 | ||
661ba50f BW |
1059 | /* Called after the current line information has been either used with |
1060 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
1061 | This resets the state of the line number information to reflect that | |
1062 | it has been used. */ | |
1063 | ||
1064 | void | |
1065 | dwarf2_consume_line_info (void) | |
1066 | { | |
1067 | /* Unless we generate DWARF2 debugging information for each | |
1068 | assembler line, we only emit one line symbol for one LOC. */ | |
5b7c81bd | 1069 | dwarf2_loc_directive_seen = false; |
bd0eb99b RH |
1070 | |
1071 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
1072 | | DWARF2_FLAG_PROLOGUE_END | |
1073 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 1074 | current.discriminator = 0; |
51298b33 | 1075 | current.u.view = NULL; |
220e750f | 1076 | } |
fac0d250 | 1077 | |
07a53e5c RH |
1078 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
1079 | is enabled, emit a basic block marker. */ | |
1080 | ||
1081 | void | |
1082 | dwarf2_emit_label (symbolS *label) | |
1083 | { | |
1084 | struct dwarf2_line_info loc; | |
1085 | ||
1086 | if (!dwarf2_loc_mark_labels) | |
1087 | return; | |
1088 | if (S_GET_SEGMENT (label) != now_seg) | |
1089 | return; | |
fd361982 | 1090 | if (!(bfd_section_flags (now_seg) & SEC_CODE)) |
07a53e5c | 1091 | return; |
7fd3924a AM |
1092 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
1093 | return; | |
1094 | ||
1095 | dwarf2_where (&loc); | |
07a53e5c RH |
1096 | |
1097 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1098 | ||
6a50d470 | 1099 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 1100 | dwarf2_consume_line_info (); |
07a53e5c RH |
1101 | } |
1102 | ||
ecb4347a DJ |
1103 | /* Handle two forms of .file directive: |
1104 | - Pass .file "source.c" to s_app_file | |
1105 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 1106 | |
68d20676 | 1107 | If an entry is added to the file table, return a pointer to the filename. */ |
ecb4347a DJ |
1108 | |
1109 | char * | |
68d20676 | 1110 | dwarf2_directive_filename (void) |
220e750f | 1111 | { |
5b7c81bd | 1112 | bool with_md5 = false; |
8f02ae5b | 1113 | valueT num; |
e46d99eb | 1114 | char *filename; |
5496f3c6 | 1115 | const char * dirname = NULL; |
220e750f RH |
1116 | int filename_len; |
1117 | ||
1118 | /* Continue to accept a bare string and pass it off. */ | |
1119 | SKIP_WHITESPACE (); | |
1120 | if (*input_line_pointer == '"') | |
fac0d250 | 1121 | { |
220e750f | 1122 | s_app_file (0); |
ecb4347a | 1123 | return NULL; |
fac0d250 RH |
1124 | } |
1125 | ||
220e750f | 1126 | num = get_absolute_expression (); |
220e750f | 1127 | |
498ff032 | 1128 | if ((offsetT) num < 1) |
fac0d250 | 1129 | { |
498ff032 AM |
1130 | if (num == 0 && dwarf_level < 5) |
1131 | dwarf_level = 5; | |
1132 | if ((offsetT) num < 0 || DWARF2_LINE_VERSION < 5) | |
705989f1 L |
1133 | { |
1134 | as_bad (_("file number less than one")); | |
1135 | ignore_rest_of_line (); | |
1136 | return NULL; | |
1137 | } | |
fac0d250 RH |
1138 | } |
1139 | ||
5496f3c6 NC |
1140 | /* FIXME: Should we allow ".file <N>\n" as an expression meaning |
1141 | "switch back to the already allocated file <N> as the current | |
1142 | file" ? */ | |
84d9ab33 NC |
1143 | |
1144 | filename = demand_copy_C_string (&filename_len); | |
1145 | if (filename == NULL) | |
1146 | /* demand_copy_C_string will have already generated an error message. */ | |
1147 | return NULL; | |
1148 | ||
5496f3c6 NC |
1149 | /* For DWARF-5 support we also accept: |
1150 | .file <NUM> ["<dir>"] "<file>" [md5 <NUM>] */ | |
1151 | if (DWARF2_LINE_VERSION > 4) | |
1152 | { | |
1153 | SKIP_WHITESPACE (); | |
1154 | if (*input_line_pointer == '"') | |
1155 | { | |
1156 | dirname = filename; | |
1157 | filename = demand_copy_C_string (&filename_len); | |
1158 | SKIP_WHITESPACE (); | |
1159 | } | |
1160 | ||
d34049e8 | 1161 | if (startswith (input_line_pointer, "md5")) |
5496f3c6 NC |
1162 | { |
1163 | input_line_pointer += 3; | |
1164 | SKIP_WHITESPACE (); | |
1165 | ||
1166 | expressionS exp; | |
1167 | expression_and_evaluate (& exp); | |
1168 | if (exp.X_op != O_big) | |
1169 | as_bad (_("md5 value too small or not a constant")); | |
1170 | else | |
5b7c81bd | 1171 | with_md5 = true; |
5496f3c6 NC |
1172 | } |
1173 | } | |
1174 | ||
84d9ab33 NC |
1175 | demand_empty_rest_of_line (); |
1176 | ||
7cadeb2c AM |
1177 | /* A .file directive implies compiler generated debug information is |
1178 | being supplied. Turn off gas generated debug info. */ | |
ef9768e3 AM |
1179 | if (debug_type == DEBUG_DWARF2) |
1180 | purge_generated_debug (); | |
7cadeb2c AM |
1181 | debug_type = DEBUG_NONE; |
1182 | ||
8f02ae5b AM |
1183 | if (num != (unsigned int) num |
1184 | || num >= (size_t) -1 / sizeof (struct file_entry) - 32) | |
220e750f | 1185 | { |
8f02ae5b | 1186 | as_bad (_("file number %lu is too big"), (unsigned long) num); |
ecb4347a | 1187 | return NULL; |
249e3833 | 1188 | } |
220e750f | 1189 | |
5496f3c6 NC |
1190 | if (! allocate_filename_to_slot (dirname, filename, (unsigned int) num, |
1191 | with_md5)) | |
1192 | return NULL; | |
ecb4347a DJ |
1193 | |
1194 | return filename; | |
fac0d250 RH |
1195 | } |
1196 | ||
68d20676 NC |
1197 | /* Calls dwarf2_directive_filename, but discards its result. |
1198 | Used in pseudo-op tables where the function result is ignored. */ | |
1199 | ||
1200 | void | |
1201 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) | |
1202 | { | |
1203 | (void) dwarf2_directive_filename (); | |
1204 | } | |
1205 | ||
220e750f | 1206 | void |
a2e22468 | 1207 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 1208 | { |
ecea7679 RH |
1209 | offsetT filenum, line; |
1210 | ||
851feff8 DJ |
1211 | /* If we see two .loc directives in a row, force the first one to be |
1212 | output now. */ | |
7cadeb2c | 1213 | if (dwarf2_loc_directive_seen) |
6a50d470 | 1214 | dwarf2_emit_insn (0); |
851feff8 | 1215 | |
ecea7679 RH |
1216 | filenum = get_absolute_expression (); |
1217 | SKIP_WHITESPACE (); | |
1218 | line = get_absolute_expression (); | |
1219 | ||
1220 | if (filenum < 1) | |
1221 | { | |
498ff032 AM |
1222 | if (filenum == 0 && dwarf_level < 5) |
1223 | dwarf_level = 5; | |
1224 | if (filenum < 0 || DWARF2_LINE_VERSION < 5) | |
5496f3c6 | 1225 | { |
498ff032 AM |
1226 | as_bad (_("file number less than one")); |
1227 | return; | |
5496f3c6 | 1228 | } |
ecea7679 | 1229 | } |
5496f3c6 | 1230 | |
498ff032 | 1231 | if ((valueT) filenum >= files_in_use || files[filenum].filename == NULL) |
ecea7679 RH |
1232 | { |
1233 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
1234 | return; | |
1235 | } | |
1236 | ||
51298b33 AM |
1237 | /* debug_type will be turned off by dwarf2_directive_filename, and |
1238 | if we don't have a dwarf style .file then files_in_use will be | |
1239 | zero and the above error will trigger. */ | |
1240 | gas_assert (debug_type == DEBUG_NONE); | |
1241 | ||
ecea7679 RH |
1242 | current.filenum = filenum; |
1243 | current.line = line; | |
92846e72 | 1244 | current.discriminator = 0; |
ecea7679 RH |
1245 | |
1246 | #ifndef NO_LISTING | |
1247 | if (listing) | |
1248 | { | |
1249 | if (files[filenum].dir) | |
1250 | { | |
1251 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
1252 | size_t file_len = strlen (files[filenum].filename); | |
add39d23 | 1253 | char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1); |
ecea7679 RH |
1254 | |
1255 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 1256 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
1257 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
1258 | cp[dir_len + file_len + 1] = '\0'; | |
1259 | listing_source_file (cp); | |
e1fa0163 | 1260 | free (cp); |
ecea7679 RH |
1261 | } |
1262 | else | |
1263 | listing_source_file (files[filenum].filename); | |
1264 | listing_source_line (line); | |
1265 | } | |
1266 | #endif | |
1267 | ||
220e750f | 1268 | SKIP_WHITESPACE (); |
ecea7679 RH |
1269 | if (ISDIGIT (*input_line_pointer)) |
1270 | { | |
1271 | current.column = get_absolute_expression (); | |
1272 | SKIP_WHITESPACE (); | |
1273 | } | |
1274 | ||
1275 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 1276 | { |
bd0eb99b RH |
1277 | char *p, c; |
1278 | offsetT value; | |
1279 | ||
d02603dc | 1280 | c = get_symbol_name (& p); |
bd0eb99b RH |
1281 | |
1282 | if (strcmp (p, "basic_block") == 0) | |
1283 | { | |
1284 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1285 | *input_line_pointer = c; | |
1286 | } | |
1287 | else if (strcmp (p, "prologue_end") == 0) | |
1288 | { | |
1289 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
1290 | *input_line_pointer = c; | |
1291 | } | |
1292 | else if (strcmp (p, "epilogue_begin") == 0) | |
1293 | { | |
1294 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
1295 | *input_line_pointer = c; | |
1296 | } | |
1297 | else if (strcmp (p, "is_stmt") == 0) | |
1298 | { | |
d02603dc | 1299 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1300 | value = get_absolute_expression (); |
1301 | if (value == 0) | |
1302 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
1303 | else if (value == 1) | |
1304 | current.flags |= DWARF2_FLAG_IS_STMT; | |
1305 | else | |
ecea7679 RH |
1306 | { |
1307 | as_bad (_("is_stmt value not 0 or 1")); | |
1308 | return; | |
1309 | } | |
bd0eb99b RH |
1310 | } |
1311 | else if (strcmp (p, "isa") == 0) | |
1312 | { | |
d02603dc | 1313 | (void) restore_line_pointer (c); |
bd0eb99b | 1314 | value = get_absolute_expression (); |
ecea7679 | 1315 | if (value >= 0) |
bd0eb99b | 1316 | current.isa = value; |
ecea7679 RH |
1317 | else |
1318 | { | |
1319 | as_bad (_("isa number less than zero")); | |
1320 | return; | |
1321 | } | |
bd0eb99b | 1322 | } |
92846e72 CC |
1323 | else if (strcmp (p, "discriminator") == 0) |
1324 | { | |
d02603dc | 1325 | (void) restore_line_pointer (c); |
92846e72 CC |
1326 | value = get_absolute_expression (); |
1327 | if (value >= 0) | |
1328 | current.discriminator = value; | |
1329 | else | |
1330 | { | |
1331 | as_bad (_("discriminator less than zero")); | |
1332 | return; | |
1333 | } | |
1334 | } | |
ba8826a8 AO |
1335 | else if (strcmp (p, "view") == 0) |
1336 | { | |
1337 | symbolS *sym; | |
1338 | ||
1339 | (void) restore_line_pointer (c); | |
1340 | SKIP_WHITESPACE (); | |
1341 | ||
1342 | if (ISDIGIT (*input_line_pointer) | |
1343 | || *input_line_pointer == '-') | |
1344 | { | |
5b7c81bd | 1345 | bool force_reset = *input_line_pointer == '-'; |
ba8826a8 AO |
1346 | |
1347 | value = get_absolute_expression (); | |
1348 | if (value != 0) | |
1349 | { | |
1350 | as_bad (_("numeric view can only be asserted to zero")); | |
1351 | return; | |
1352 | } | |
1353 | if (force_reset && force_reset_view) | |
1354 | sym = force_reset_view; | |
1355 | else | |
1356 | { | |
e01e1cee AM |
1357 | sym = symbol_temp_new (absolute_section, &zero_address_frag, |
1358 | value); | |
ba8826a8 AO |
1359 | if (force_reset) |
1360 | force_reset_view = sym; | |
1361 | } | |
1362 | } | |
1363 | else | |
1364 | { | |
1365 | char *name = read_symbol_name (); | |
1366 | ||
1367 | if (!name) | |
1368 | return; | |
1369 | sym = symbol_find_or_make (name); | |
38cf168b | 1370 | if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) |
ba8826a8 | 1371 | { |
38cf168b | 1372 | if (S_IS_VOLATILE (sym)) |
ba8826a8 | 1373 | sym = symbol_clone (sym, 1); |
38cf168b AM |
1374 | else if (!S_CAN_BE_REDEFINED (sym)) |
1375 | { | |
1376 | as_bad (_("symbol `%s' is already defined"), name); | |
1377 | return; | |
1378 | } | |
ba8826a8 | 1379 | } |
38cf168b AM |
1380 | S_SET_SEGMENT (sym, undefined_section); |
1381 | S_SET_VALUE (sym, 0); | |
1382 | symbol_set_frag (sym, &zero_address_frag); | |
ba8826a8 | 1383 | } |
51298b33 | 1384 | current.u.view = sym; |
ba8826a8 | 1385 | } |
bd0eb99b RH |
1386 | else |
1387 | { | |
ecea7679 | 1388 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
d02603dc | 1389 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1390 | return; |
1391 | } | |
1392 | ||
d02603dc | 1393 | SKIP_WHITESPACE_AFTER_NAME (); |
bd0eb99b RH |
1394 | } |
1395 | ||
1396 | demand_empty_rest_of_line (); | |
5b7c81bd | 1397 | dwarf2_any_loc_directive_seen = dwarf2_loc_directive_seen = true; |
ba8826a8 AO |
1398 | |
1399 | /* If we were given a view id, emit the row right away. */ | |
51298b33 | 1400 | if (current.u.view) |
ba8826a8 | 1401 | dwarf2_emit_insn (0); |
220e750f | 1402 | } |
07a53e5c RH |
1403 | |
1404 | void | |
1405 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
1406 | { | |
1407 | offsetT value = get_absolute_expression (); | |
1408 | ||
1409 | if (value != 0 && value != 1) | |
1410 | { | |
1411 | as_bad (_("expected 0 or 1")); | |
1412 | ignore_rest_of_line (); | |
1413 | } | |
1414 | else | |
1415 | { | |
1416 | dwarf2_loc_mark_labels = value != 0; | |
1417 | demand_empty_rest_of_line (); | |
1418 | } | |
1419 | } | |
220e750f RH |
1420 | \f |
1421 | static struct frag * | |
a2e22468 | 1422 | first_frag_for_seg (segT seg) |
220e750f | 1423 | { |
c9049d30 | 1424 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
1425 | } |
1426 | ||
1427 | static struct frag * | |
a2e22468 | 1428 | last_frag_for_seg (segT seg) |
220e750f | 1429 | { |
c9049d30 | 1430 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 1431 | |
c9049d30 AM |
1432 | while (f->frch_next != NULL) |
1433 | f = f->frch_next; | |
220e750f | 1434 | |
c9049d30 | 1435 | return f->frch_last; |
220e750f RH |
1436 | } |
1437 | \f | |
1438 | /* Emit a single byte into the current segment. */ | |
1439 | ||
1440 | static inline void | |
a2e22468 | 1441 | out_byte (int byte) |
220e750f RH |
1442 | { |
1443 | FRAG_APPEND_1_CHAR (byte); | |
1444 | } | |
1445 | ||
1446 | /* Emit a statement program opcode into the current segment. */ | |
1447 | ||
1448 | static inline void | |
a2e22468 | 1449 | out_opcode (int opc) |
220e750f RH |
1450 | { |
1451 | out_byte (opc); | |
1452 | } | |
1453 | ||
1454 | /* Emit a two-byte word into the current segment. */ | |
1455 | ||
1456 | static inline void | |
a2e22468 | 1457 | out_two (int data) |
220e750f RH |
1458 | { |
1459 | md_number_to_chars (frag_more (2), data, 2); | |
1460 | } | |
1461 | ||
1462 | /* Emit a four byte word into the current segment. */ | |
1463 | ||
1464 | static inline void | |
a2e22468 | 1465 | out_four (int data) |
220e750f RH |
1466 | { |
1467 | md_number_to_chars (frag_more (4), data, 4); | |
1468 | } | |
1469 | ||
1470 | /* Emit an unsigned "little-endian base 128" number. */ | |
1471 | ||
fac0d250 | 1472 | static void |
a2e22468 | 1473 | out_uleb128 (addressT value) |
220e750f RH |
1474 | { |
1475 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
1476 | } | |
1477 | ||
92846e72 CC |
1478 | /* Emit a signed "little-endian base 128" number. */ |
1479 | ||
1480 | static void | |
1481 | out_leb128 (addressT value) | |
1482 | { | |
1483 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
1484 | } | |
1485 | ||
220e750f RH |
1486 | /* Emit a tuple for .debug_abbrev. */ |
1487 | ||
1488 | static inline void | |
a2e22468 | 1489 | out_abbrev (int name, int form) |
fac0d250 | 1490 | { |
220e750f RH |
1491 | out_uleb128 (name); |
1492 | out_uleb128 (form); | |
1493 | } | |
fac0d250 | 1494 | |
220e750f | 1495 | /* Get the size of a fragment. */ |
fac0d250 | 1496 | |
220e750f | 1497 | static offsetT |
c9049d30 | 1498 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
1499 | { |
1500 | frchainS *fr; | |
1501 | ||
1502 | if (frag->fr_next) | |
1503 | return frag->fr_fix; | |
1504 | ||
1505 | /* If a fragment is the last in the chain, special measures must be | |
1506 | taken to find its size before relaxation, since it may be pending | |
1507 | on some subsegment chain. */ | |
c9049d30 | 1508 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 1509 | if (fr->frch_last == frag) |
c5c0a210 | 1510 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
1511 | |
1512 | abort (); | |
1513 | } | |
fac0d250 | 1514 | |
220e750f | 1515 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 1516 | |
220e750f | 1517 | static void |
07a53e5c | 1518 | out_set_addr (symbolS *sym) |
220e750f | 1519 | { |
91d6fa6a | 1520 | expressionS exp; |
9e3af0e7 | 1521 | |
031e3350 | 1522 | memset (&exp, 0, sizeof exp); |
e2b9a97e CE |
1523 | out_opcode (DW_LNS_extended_op); |
1524 | out_uleb128 (sizeof_address + 1); | |
fac0d250 | 1525 | |
e2b9a97e | 1526 | out_opcode (DW_LNE_set_address); |
91d6fa6a NC |
1527 | exp.X_op = O_symbol; |
1528 | exp.X_add_symbol = sym; | |
1529 | exp.X_add_number = 0; | |
1530 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
1531 | } |
1532 | ||
a2e22468 | 1533 | static void scale_addr_delta (addressT *); |
c8970b4b | 1534 | |
a3b75434 | 1535 | static void |
d7342424 | 1536 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
1537 | { |
1538 | static int printed_this = 0; | |
8fbf7334 | 1539 | if (DWARF2_LINE_MIN_INSN_LENGTH > 1) |
a3b75434 | 1540 | { |
8fbf7334 | 1541 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this) |
8f02ae5b | 1542 | { |
8fbf7334 | 1543 | as_bad("unaligned opcodes detected in executable segment"); |
8f02ae5b AM |
1544 | printed_this = 1; |
1545 | } | |
8fbf7334 | 1546 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; |
a3b75434 | 1547 | } |
a3b75434 | 1548 | } |
a3b75434 | 1549 | |
220e750f RH |
1550 | /* Encode a pair of line and address skips as efficiently as possible. |
1551 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 1552 | |
220e750f RH |
1553 | The following two routines *must* be kept in sync. This is |
1554 | enforced by making emit_inc_line_addr abort if we do not emit | |
1555 | exactly the expected number of bytes. */ | |
1556 | ||
1557 | static int | |
a2e22468 | 1558 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 1559 | { |
220e750f RH |
1560 | unsigned int tmp, opcode; |
1561 | int len = 0; | |
fac0d250 | 1562 | |
220e750f | 1563 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 1564 | scale_addr_delta (&addr_delta); |
220e750f RH |
1565 | |
1566 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
1567 | We cannot use special opcodes here, since we want the end_sequence | |
1568 | to emit the matrix entry. */ | |
1569 | if (line_delta == INT_MAX) | |
fac0d250 | 1570 | { |
220e750f RH |
1571 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1572 | len = 1; | |
62e6b7b3 | 1573 | else if (addr_delta) |
220e750f RH |
1574 | len = 1 + sizeof_leb128 (addr_delta, 0); |
1575 | return len + 3; | |
fac0d250 | 1576 | } |
fac0d250 | 1577 | |
220e750f RH |
1578 | /* Bias the line delta by the base. */ |
1579 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 1580 | |
220e750f RH |
1581 | /* If the line increment is out of range of a special opcode, we |
1582 | must encode it with DW_LNS_advance_line. */ | |
1583 | if (tmp >= DWARF2_LINE_RANGE) | |
1584 | { | |
1585 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1586 | line_delta = 0; | |
1587 | tmp = 0 - DWARF2_LINE_BASE; | |
1588 | } | |
fac0d250 | 1589 | |
220e750f RH |
1590 | /* Bias the opcode by the special opcode base. */ |
1591 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 1592 | |
220e750f RH |
1593 | /* Avoid overflow when addr_delta is large. */ |
1594 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
1595 | { | |
1596 | /* Try using a special opcode. */ | |
1597 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1598 | if (opcode <= 255) | |
1599 | return len + 1; | |
1600 | ||
1601 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1602 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1603 | if (opcode <= 255) | |
1604 | return len + 2; | |
1605 | } | |
1606 | ||
1607 | /* Otherwise use DW_LNS_advance_pc. */ | |
1608 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
1609 | ||
1610 | /* DW_LNS_copy or special opcode. */ | |
1611 | len += 1; | |
1612 | ||
1613 | return len; | |
1614 | } | |
fac0d250 | 1615 | |
220e750f | 1616 | static void |
a2e22468 | 1617 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
1618 | { |
1619 | unsigned int tmp, opcode; | |
1620 | int need_copy = 0; | |
1621 | char *end = p + len; | |
fac0d250 | 1622 | |
07a53e5c RH |
1623 | /* Line number sequences cannot go backward in addresses. This means |
1624 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1625 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 1626 | |
220e750f | 1627 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
1628 | scale_addr_delta (&addr_delta); |
1629 | ||
220e750f RH |
1630 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
1631 | We cannot use special opcodes here, since we want the end_sequence | |
1632 | to emit the matrix entry. */ | |
1633 | if (line_delta == INT_MAX) | |
fac0d250 | 1634 | { |
220e750f RH |
1635 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1636 | *p++ = DW_LNS_const_add_pc; | |
62e6b7b3 | 1637 | else if (addr_delta) |
fac0d250 | 1638 | { |
220e750f RH |
1639 | *p++ = DW_LNS_advance_pc; |
1640 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 1641 | } |
220e750f RH |
1642 | |
1643 | *p++ = DW_LNS_extended_op; | |
1644 | *p++ = 1; | |
1645 | *p++ = DW_LNE_end_sequence; | |
1646 | goto done; | |
fac0d250 RH |
1647 | } |
1648 | ||
220e750f RH |
1649 | /* Bias the line delta by the base. */ |
1650 | tmp = line_delta - DWARF2_LINE_BASE; | |
1651 | ||
1652 | /* If the line increment is out of range of a special opcode, we | |
1653 | must encode it with DW_LNS_advance_line. */ | |
1654 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 1655 | { |
220e750f RH |
1656 | *p++ = DW_LNS_advance_line; |
1657 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 1658 | |
220e750f RH |
1659 | line_delta = 0; |
1660 | tmp = 0 - DWARF2_LINE_BASE; | |
1661 | need_copy = 1; | |
1662 | } | |
fac0d250 | 1663 | |
bd0eb99b RH |
1664 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
1665 | special opcode. */ | |
1666 | if (line_delta == 0 && addr_delta == 0) | |
1667 | { | |
1668 | *p++ = DW_LNS_copy; | |
1669 | goto done; | |
1670 | } | |
1671 | ||
220e750f RH |
1672 | /* Bias the opcode by the special opcode base. */ |
1673 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1674 | |
220e750f RH |
1675 | /* Avoid overflow when addr_delta is large. */ |
1676 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 1677 | { |
220e750f RH |
1678 | /* Try using a special opcode. */ |
1679 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1680 | if (opcode <= 255) | |
1681 | { | |
1682 | *p++ = opcode; | |
1683 | goto done; | |
1684 | } | |
1685 | ||
1686 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1687 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1688 | if (opcode <= 255) | |
fac0d250 | 1689 | { |
220e750f RH |
1690 | *p++ = DW_LNS_const_add_pc; |
1691 | *p++ = opcode; | |
1692 | goto done; | |
fac0d250 RH |
1693 | } |
1694 | } | |
220e750f RH |
1695 | |
1696 | /* Otherwise use DW_LNS_advance_pc. */ | |
1697 | *p++ = DW_LNS_advance_pc; | |
1698 | p += output_leb128 (p, addr_delta, 0); | |
1699 | ||
1700 | if (need_copy) | |
1701 | *p++ = DW_LNS_copy; | |
fac0d250 | 1702 | else |
220e750f | 1703 | *p++ = tmp; |
fac0d250 | 1704 | |
220e750f | 1705 | done: |
9c2799c2 | 1706 | gas_assert (p == end); |
220e750f | 1707 | } |
a8316fe2 | 1708 | |
220e750f | 1709 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1710 | |
220e750f | 1711 | static void |
a2e22468 | 1712 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1713 | { |
1714 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1715 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1716 | } | |
9de8d8f1 | 1717 | |
1737851b BW |
1718 | /* Write out an alternative form of line and address skips using |
1719 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1720 | line and address information, but it is required if linker relaxation |
1721 | could change the code offsets. The following two routines *must* be | |
1722 | kept in sync. */ | |
453dc3f0 | 1723 | #define ADDR_DELTA_LIMIT 50000 |
1737851b | 1724 | |
7ddd14de BW |
1725 | static int |
1726 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1727 | { |
7ddd14de | 1728 | int len = 0; |
1737851b BW |
1729 | |
1730 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1731 | if (line_delta != INT_MAX) |
1732 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1733 | ||
453dc3f0 | 1734 | if (addr_delta > ADDR_DELTA_LIMIT) |
7ddd14de BW |
1735 | { |
1736 | /* DW_LNS_extended_op */ | |
1737 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1738 | /* DW_LNE_set_address */ | |
1739 | len += 1 + sizeof_address; | |
1740 | } | |
1741 | else | |
1742 | /* DW_LNS_fixed_advance_pc */ | |
1743 | len += 3; | |
1744 | ||
1737851b | 1745 | if (line_delta == INT_MAX) |
7ddd14de BW |
1746 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1747 | len += 3; | |
1748 | else | |
1749 | /* DW_LNS_copy */ | |
1750 | len += 1; | |
1751 | ||
1752 | return len; | |
1753 | } | |
1754 | ||
1755 | static void | |
1756 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1757 | char *p, int len) | |
1758 | { | |
91d6fa6a | 1759 | expressionS *pexp; |
7ddd14de BW |
1760 | char *end = p + len; |
1761 | ||
1762 | /* Line number sequences cannot go backward in addresses. This means | |
1763 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1764 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de | 1765 | |
b40bf0a2 NC |
1766 | /* Verify that we have kept in sync with size_fixed_inc_line_addr. */ |
1767 | gas_assert (len == size_fixed_inc_line_addr (line_delta, addr_delta)); | |
1768 | ||
7ddd14de BW |
1769 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ |
1770 | if (line_delta != INT_MAX) | |
1771 | { | |
1772 | *p++ = DW_LNS_advance_line; | |
1773 | p += output_leb128 (p, line_delta, 1); | |
1774 | } | |
1775 | ||
91d6fa6a | 1776 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1777 | |
1778 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1779 | advance the address by at most 64K. Linker relaxation (without | |
1780 | which this function would not be used) could change the operand by | |
1781 | an unknown amount. If the address increment is getting close to | |
1782 | the limit, just reset the address. */ | |
453dc3f0 | 1783 | if (addr_delta > ADDR_DELTA_LIMIT) |
1737851b | 1784 | { |
7ddd14de | 1785 | symbolS *to_sym; |
91d6fa6a | 1786 | expressionS exp; |
7ddd14de | 1787 | |
031e3350 | 1788 | memset (&exp, 0, sizeof exp); |
9f6db0d3 | 1789 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1790 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1791 | |
1792 | *p++ = DW_LNS_extended_op; | |
1793 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1794 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1795 | exp.X_op = O_symbol; |
1796 | exp.X_add_symbol = to_sym; | |
1797 | exp.X_add_number = 0; | |
62ebcb5c | 1798 | emit_expr_fix (&exp, sizeof_address, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de BW |
1799 | p += sizeof_address; |
1800 | } | |
1801 | else | |
1802 | { | |
1803 | *p++ = DW_LNS_fixed_advance_pc; | |
62ebcb5c | 1804 | emit_expr_fix (pexp, 2, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de | 1805 | p += 2; |
1737851b BW |
1806 | } |
1807 | ||
7ddd14de BW |
1808 | if (line_delta == INT_MAX) |
1809 | { | |
1810 | *p++ = DW_LNS_extended_op; | |
1811 | *p++ = 1; | |
1812 | *p++ = DW_LNE_end_sequence; | |
1813 | } | |
1814 | else | |
1815 | *p++ = DW_LNS_copy; | |
1737851b | 1816 | |
9c2799c2 | 1817 | gas_assert (p == end); |
1737851b BW |
1818 | } |
1819 | ||
220e750f RH |
1820 | /* Generate a variant frag that we can use to relax address/line |
1821 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1822 | |
220e750f | 1823 | static void |
07a53e5c | 1824 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1825 | { |
91d6fa6a | 1826 | expressionS exp; |
220e750f | 1827 | int max_chars; |
6576f0b5 | 1828 | |
031e3350 | 1829 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
1830 | exp.X_op = O_subtract; |
1831 | exp.X_add_symbol = to_sym; | |
1832 | exp.X_op_symbol = from_sym; | |
1833 | exp.X_add_number = 0; | |
fac0d250 | 1834 | |
220e750f RH |
1835 | /* The maximum size of the frag is the line delta with a maximum |
1836 | sized address delta. */ | |
7ddd14de BW |
1837 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1838 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1839 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1840 | else | |
1841 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1842 | |
220e750f | 1843 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1844 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1845 | } |
fac0d250 | 1846 | |
220e750f RH |
1847 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1848 | based on the current values of the symbols. It is called before | |
1849 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1850 | |
220e750f | 1851 | int |
a2e22468 | 1852 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1853 | { |
1854 | offsetT addr_delta; | |
1855 | int size; | |
fac0d250 | 1856 | |
6386f3a7 | 1857 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1858 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1859 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1860 | else | |
1861 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1862 | |
220e750f | 1863 | frag->fr_subtype = size; |
fac0d250 | 1864 | |
220e750f RH |
1865 | return size; |
1866 | } | |
1867 | ||
1868 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1869 | current values of the symbols. fr_subtype is the current length | |
1870 | of the frag. This returns the change in frag length. */ | |
1871 | ||
1872 | int | |
a2e22468 | 1873 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1874 | { |
1875 | int old_size, new_size; | |
fac0d250 | 1876 | |
220e750f RH |
1877 | old_size = frag->fr_subtype; |
1878 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1879 | |
220e750f | 1880 | return new_size - old_size; |
fac0d250 RH |
1881 | } |
1882 | ||
220e750f RH |
1883 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1884 | fill frag. This is called after all relaxation has been done. | |
1885 | fr_subtype will be the desired length of the frag. */ | |
1886 | ||
1887 | void | |
a2e22468 | 1888 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1889 | { |
220e750f RH |
1890 | offsetT addr_diff; |
1891 | ||
453dc3f0 NC |
1892 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1893 | { | |
2b0f3761 | 1894 | /* If linker relaxation is enabled then the distance between the two |
453dc3f0 NC |
1895 | symbols in the frag->fr_symbol expression might change. Hence we |
1896 | cannot rely upon the value computed by resolve_symbol_value. | |
1897 | Instead we leave the expression unfinalized and allow | |
1898 | emit_fixed_inc_line_addr to create a fixup (which later becomes a | |
1899 | relocation) that will allow the linker to correctly compute the | |
1900 | actual address difference. We have to use a fixed line advance for | |
1901 | this as we cannot (easily) relocate leb128 encoded values. */ | |
1902 | int saved_finalize_syms = finalize_syms; | |
1903 | ||
1904 | finalize_syms = 0; | |
1905 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
1906 | finalize_syms = saved_finalize_syms; | |
1907 | } | |
1908 | else | |
1909 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
fac0d250 | 1910 | |
220e750f RH |
1911 | /* fr_var carries the max_chars that we created the fragment with. |
1912 | fr_subtype carries the current expected length. We must, of | |
1913 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1914 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1915 | |
7ddd14de BW |
1916 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1917 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1918 | frag->fr_literal + frag->fr_fix, | |
1919 | frag->fr_subtype); | |
1920 | else | |
1921 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1922 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1923 | |
1924 | frag->fr_fix += frag->fr_subtype; | |
1925 | frag->fr_type = rs_fill; | |
1926 | frag->fr_var = 0; | |
1927 | frag->fr_offset = 0; | |
1928 | } | |
1929 | ||
1930 | /* Generate .debug_line content for the chain of line number entries | |
1931 | beginning at E, for segment SEG. */ | |
1932 | ||
1933 | static void | |
a2e22468 | 1934 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1935 | { |
1936 | unsigned filenum = 1; | |
1937 | unsigned line = 1; | |
1938 | unsigned column = 0; | |
bd0eb99b RH |
1939 | unsigned isa = 0; |
1940 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1941 | fragS *last_frag = NULL, *frag; |
1942 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1943 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1944 | struct line_entry *next; |
1945 | ||
b40bf0a2 NC |
1946 | if (flag_dwarf_sections) |
1947 | { | |
1948 | char * name; | |
1949 | const char * sec_name; | |
1950 | ||
2b0f3761 | 1951 | /* Switch to the relevant sub-section before we start to emit |
b40bf0a2 NC |
1952 | the line number table. |
1953 | ||
1954 | FIXME: These sub-sections do not have a normal Line Number | |
1955 | Program Header, thus strictly speaking they are not valid | |
1956 | DWARF sections. Unfortunately the DWARF standard assumes | |
1957 | a one-to-one relationship between compilation units and | |
1958 | line number tables. Thus we have to have a .debug_line | |
1959 | section, as well as our sub-sections, and we have to ensure | |
1960 | that all of the sub-sections are merged into a proper | |
1961 | .debug_line section before a debugger sees them. */ | |
3739860c | 1962 | |
fd361982 | 1963 | sec_name = bfd_section_name (seg); |
b40bf0a2 NC |
1964 | if (strcmp (sec_name, ".text") != 0) |
1965 | { | |
29a2809e | 1966 | name = concat (".debug_line", sec_name, (char *) NULL); |
5b7c81bd | 1967 | subseg_set (subseg_get (name, false), 0); |
b40bf0a2 NC |
1968 | } |
1969 | else | |
1970 | /* Don't create a .debug_line.text section - | |
1971 | that is redundant. Instead just switch back to the | |
1972 | normal .debug_line section. */ | |
5b7c81bd | 1973 | subseg_set (subseg_get (".debug_line", false), 0); |
b40bf0a2 NC |
1974 | } |
1975 | ||
fead5cd9 | 1976 | do |
fac0d250 | 1977 | { |
07a53e5c | 1978 | int line_delta; |
220e750f RH |
1979 | |
1980 | if (filenum != e->loc.filenum) | |
fac0d250 | 1981 | { |
220e750f RH |
1982 | filenum = e->loc.filenum; |
1983 | out_opcode (DW_LNS_set_file); | |
1984 | out_uleb128 (filenum); | |
220e750f RH |
1985 | } |
1986 | ||
1987 | if (column != e->loc.column) | |
1988 | { | |
1989 | column = e->loc.column; | |
1990 | out_opcode (DW_LNS_set_column); | |
1991 | out_uleb128 (column); | |
220e750f RH |
1992 | } |
1993 | ||
92846e72 CC |
1994 | if (e->loc.discriminator != 0) |
1995 | { | |
1996 | out_opcode (DW_LNS_extended_op); | |
1997 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1998 | out_opcode (DW_LNE_set_discriminator); | |
1999 | out_uleb128 (e->loc.discriminator); | |
2000 | } | |
2001 | ||
bd0eb99b RH |
2002 | if (isa != e->loc.isa) |
2003 | { | |
2004 | isa = e->loc.isa; | |
2005 | out_opcode (DW_LNS_set_isa); | |
2006 | out_uleb128 (isa); | |
bd0eb99b RH |
2007 | } |
2008 | ||
2009 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
2010 | { |
2011 | flags = e->loc.flags; | |
2012 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
2013 | } |
2014 | ||
bd0eb99b | 2015 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 2016 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 2017 | |
bd0eb99b | 2018 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 2019 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
2020 | |
2021 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 2022 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 2023 | |
fb81275c JM |
2024 | /* Don't try to optimize away redundant entries; gdb wants two |
2025 | entries for a function where the code starts on the same line as | |
2026 | the {, and there's no way to identify that case here. Trust gcc | |
2027 | to optimize appropriately. */ | |
07a53e5c RH |
2028 | line_delta = e->loc.line - line; |
2029 | lab = e->label; | |
2030 | frag = symbol_get_frag (lab); | |
2031 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 2032 | |
ba8826a8 | 2033 | if (last_frag == NULL |
51298b33 | 2034 | || (e->loc.u.view == force_reset_view && force_reset_view |
ba8826a8 AO |
2035 | /* If we're going to reset the view, but we know we're |
2036 | advancing the PC, we don't have to force with | |
2037 | set_address. We know we do when we're at the same | |
2038 | address of the same frag, and we know we might when | |
2039 | we're in the beginning of a frag, and we were at the | |
2040 | end of the previous frag. */ | |
2041 | && (frag == last_frag | |
2042 | ? (last_frag_ofs == frag_ofs) | |
2043 | : (frag_ofs == 0 | |
2044 | && ((offsetT)last_frag_ofs | |
2045 | >= get_frag_fix (last_frag, seg)))))) | |
220e750f | 2046 | { |
07a53e5c RH |
2047 | out_set_addr (lab); |
2048 | out_inc_line_addr (line_delta, 0); | |
220e750f | 2049 | } |
7ddd14de | 2050 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
2051 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
2052 | else | |
2053 | relax_inc_line_addr (line_delta, lab, last_lab); | |
2054 | ||
2055 | line = e->loc.line; | |
2056 | last_lab = lab; | |
2057 | last_frag = frag; | |
2058 | last_frag_ofs = frag_ofs; | |
220e750f RH |
2059 | |
2060 | next = e->next; | |
2061 | free (e); | |
2062 | e = next; | |
fac0d250 | 2063 | } |
fead5cd9 | 2064 | while (e); |
353e2c69 | 2065 | |
220e750f | 2066 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 2067 | frag = last_frag_for_seg (seg); |
c9049d30 | 2068 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 2069 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 2070 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 2071 | else |
07a53e5c | 2072 | { |
e01e1cee | 2073 | lab = symbol_temp_new (seg, frag, frag_ofs); |
07a53e5c RH |
2074 | relax_inc_line_addr (INT_MAX, lab, last_lab); |
2075 | } | |
fac0d250 RH |
2076 | } |
2077 | ||
d2a54558 MW |
2078 | /* Switch to LINE_STR_SEG and output the given STR. Return the |
2079 | symbol pointing to the new string in the section. */ | |
2080 | ||
2081 | static symbolS * | |
2082 | add_line_strp (segT line_str_seg, const char *str) | |
2083 | { | |
2084 | char *cp; | |
2085 | size_t size; | |
2086 | symbolS *sym; | |
2087 | ||
2088 | subseg_set (line_str_seg, 0); | |
2089 | ||
2090 | sym = symbol_temp_new_now_octets (); | |
2091 | ||
2092 | size = strlen (str) + 1; | |
2093 | cp = frag_more (size); | |
2094 | memcpy (cp, str, size); | |
2095 | ||
2096 | return sym; | |
2097 | } | |
2098 | ||
2099 | ||
220e750f RH |
2100 | /* Emit the directory and file tables for .debug_line. */ |
2101 | ||
fac0d250 | 2102 | static void |
d2a54558 | 2103 | out_dir_and_file_list (segT line_seg, int sizeof_offset) |
fac0d250 RH |
2104 | { |
2105 | size_t size; | |
3d6b762c | 2106 | const char *dir; |
fac0d250 | 2107 | char *cp; |
220e750f | 2108 | unsigned int i; |
5b7c81bd AM |
2109 | bool emit_md5 = false; |
2110 | bool emit_timestamps = true; | |
2111 | bool emit_filesize = true; | |
d2a54558 MW |
2112 | segT line_str_seg = NULL; |
2113 | symbolS *line_strp; | |
220e750f | 2114 | |
5496f3c6 | 2115 | /* Output the Directory Table. */ |
5496f3c6 NC |
2116 | if (DWARF2_LINE_VERSION >= 5) |
2117 | { | |
546cb2d8 | 2118 | /* We only have one column in the directory table. */ |
5496f3c6 | 2119 | out_byte (1); |
546cb2d8 NC |
2120 | |
2121 | /* Describe the purpose and format of the column. */ | |
5496f3c6 | 2122 | out_uleb128 (DW_LNCT_path); |
d2a54558 MW |
2123 | /* Store these strings in the .debug_line_str section so they |
2124 | can be shared. */ | |
2125 | out_uleb128 (DW_FORM_line_strp); | |
546cb2d8 | 2126 | |
f63d03dd MW |
2127 | /* Now state how many rows there are in the table. We need at |
2128 | least 1 if there is one or more file names to store the | |
2129 | "working directory". */ | |
2130 | if (dirs_in_use == 0 && files_in_use > 0) | |
2131 | out_uleb128 (1); | |
2132 | else | |
2133 | out_uleb128 (dirs_in_use); | |
5496f3c6 NC |
2134 | } |
2135 | ||
a7ed1ca2 | 2136 | /* Emit directory list. */ |
f63d03dd | 2137 | if (DWARF2_LINE_VERSION >= 5 && (dirs_in_use > 0 || files_in_use > 0)) |
5496f3c6 | 2138 | { |
d2a54558 MW |
2139 | line_str_seg = subseg_new (".debug_line_str", 0); |
2140 | bfd_set_section_flags (line_str_seg, | |
2141 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2142 | | SEC_MERGE | SEC_STRINGS); | |
2143 | line_str_seg->entsize = 1; | |
2144 | ||
f63d03dd MW |
2145 | /* DWARF5 uses slot zero, but that is only set explicitly |
2146 | using a .file 0 directive. If that isn't used, but dir | |
2147 | one is used, then use that as main file directory. | |
2148 | Otherwise use pwd as main file directory. */ | |
2149 | if (dirs_in_use > 0 && dirs != NULL && dirs[0] != NULL) | |
5496f3c6 | 2150 | dir = remap_debug_filename (dirs[0]); |
3417bfca NC |
2151 | else if (dirs_in_use > 1 |
2152 | && dirs != NULL | |
2153 | && dirs[1] != NULL | |
2154 | /* DWARF-5 directory tables expect dir[0] to be the same as | |
2155 | DW_AT_comp_dir, which is the same as pwd. */ | |
2156 | && dwarf_level < 5) | |
f63d03dd MW |
2157 | dir = remap_debug_filename (dirs[1]); |
2158 | else | |
2159 | dir = remap_debug_filename (getpwd ()); | |
2160 | ||
d2a54558 MW |
2161 | line_strp = add_line_strp (line_str_seg, dir); |
2162 | subseg_set (line_seg, 0); | |
2163 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
5496f3c6 | 2164 | } |
a7ed1ca2 NC |
2165 | for (i = 1; i < dirs_in_use; ++i) |
2166 | { | |
3d6b762c | 2167 | dir = remap_debug_filename (dirs[i]); |
d2a54558 MW |
2168 | if (DWARF2_LINE_VERSION < 5) |
2169 | { | |
2170 | size = strlen (dir) + 1; | |
2171 | cp = frag_more (size); | |
2172 | memcpy (cp, dir, size); | |
2173 | } | |
2174 | else | |
2175 | { | |
2176 | line_strp = add_line_strp (line_str_seg, dir); | |
2177 | subseg_set (line_seg, 0); | |
2178 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2179 | } | |
a7ed1ca2 | 2180 | } |
fac0d250 | 2181 | |
5496f3c6 NC |
2182 | if (DWARF2_LINE_VERSION < 5) |
2183 | /* Terminate it. */ | |
2184 | out_byte ('\0'); | |
2185 | ||
2186 | /* Output the File Name Table. */ | |
5496f3c6 NC |
2187 | if (DWARF2_LINE_VERSION >= 5) |
2188 | { | |
2189 | unsigned int columns = 4; | |
2190 | ||
2191 | if (((unsigned long) DWARF2_FILE_TIME_NAME ("", "")) == -1UL) | |
2192 | { | |
5b7c81bd | 2193 | emit_timestamps = false; |
5496f3c6 NC |
2194 | -- columns; |
2195 | } | |
2196 | ||
2197 | if (DWARF2_FILE_SIZE_NAME ("", "") == -1) | |
2198 | { | |
5b7c81bd | 2199 | emit_filesize = false; |
5496f3c6 NC |
2200 | -- columns; |
2201 | } | |
2202 | ||
2203 | for (i = 0; i < files_in_use; ++i) | |
2204 | if (files[i].md5[0] != 0) | |
2205 | break; | |
2206 | if (i < files_in_use) | |
2207 | { | |
5b7c81bd | 2208 | emit_md5 = true; |
5496f3c6 NC |
2209 | ++ columns; |
2210 | } | |
2211 | ||
2212 | /* The number of format entries to follow. */ | |
2213 | out_byte (columns); | |
5496f3c6 NC |
2214 | /* The format of the file name. */ |
2215 | out_uleb128 (DW_LNCT_path); | |
d2a54558 MW |
2216 | /* Store these strings in the .debug_line_str section so they |
2217 | can be shared. */ | |
2218 | out_uleb128 (DW_FORM_line_strp); | |
5496f3c6 NC |
2219 | |
2220 | /* The format of the directory index. */ | |
2221 | out_uleb128 (DW_LNCT_directory_index); | |
2222 | out_uleb128 (DW_FORM_udata); | |
2223 | ||
2224 | if (emit_timestamps) | |
2225 | { | |
2226 | /* The format of the timestamp. */ | |
2227 | out_uleb128 (DW_LNCT_timestamp); | |
2228 | out_uleb128 (DW_FORM_udata); | |
2229 | } | |
2230 | ||
2231 | if (emit_filesize) | |
2232 | { | |
2233 | /* The format of the file size. */ | |
2234 | out_uleb128 (DW_LNCT_size); | |
2235 | out_uleb128 (DW_FORM_udata); | |
2236 | } | |
2237 | ||
2238 | if (emit_md5) | |
2239 | { | |
2240 | /* The format of the MD5 sum. */ | |
2241 | out_uleb128 (DW_LNCT_MD5); | |
2242 | out_uleb128 (DW_FORM_data16); | |
2243 | } | |
2244 | ||
2245 | /* The number of entries in the table. */ | |
2246 | out_uleb128 (files_in_use); | |
2247 | } | |
2248 | ||
2249 | for (i = DWARF2_LINE_VERSION > 4 ? 0 : 1; i < files_in_use; ++i) | |
fac0d250 | 2250 | { |
01e1a5bc NC |
2251 | const char *fullfilename; |
2252 | ||
249e3833 RH |
2253 | if (files[i].filename == NULL) |
2254 | { | |
f63d03dd MW |
2255 | /* Prevent a crash later, particularly for file 1. DWARF5 |
2256 | uses slot zero, but that is only set explicitly using a | |
2257 | .file 0 directive. If that isn't used, but file 1 is, | |
2258 | then use that as main file name. */ | |
3417bfca NC |
2259 | if (DWARF2_LINE_VERSION >= 5 && i == 0 && files_in_use >= 1 && files[0].filename == NULL) |
2260 | files[0].filename = files[1].filename; | |
f63d03dd MW |
2261 | else |
2262 | files[i].filename = ""; | |
5496f3c6 NC |
2263 | if (DWARF2_LINE_VERSION < 5 || i != 0) |
2264 | { | |
2265 | as_bad (_("unassigned file number %ld"), (long) i); | |
2266 | continue; | |
2267 | } | |
249e3833 RH |
2268 | } |
2269 | ||
01e1a5bc NC |
2270 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
2271 | files[i].dir ? dirs [files [i].dir] : ""); | |
d2a54558 MW |
2272 | if (DWARF2_LINE_VERSION < 5) |
2273 | { | |
2274 | size = strlen (fullfilename) + 1; | |
2275 | cp = frag_more (size); | |
2276 | memcpy (cp, fullfilename, size); | |
2277 | } | |
2278 | else | |
2279 | { | |
2280 | line_strp = add_line_strp (line_str_seg, fullfilename); | |
2281 | subseg_set (line_seg, 0); | |
2282 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2283 | } | |
fac0d250 | 2284 | |
5496f3c6 NC |
2285 | /* Directory number. */ |
2286 | out_uleb128 (files[i].dir); | |
2287 | ||
01e1a5bc | 2288 | /* Output the last modification timestamp. */ |
5496f3c6 NC |
2289 | if (emit_timestamps) |
2290 | { | |
2291 | offsetT timestamp; | |
2292 | ||
2293 | timestamp = DWARF2_FILE_TIME_NAME (files[i].filename, | |
2294 | files[i].dir ? dirs [files [i].dir] : ""); | |
2295 | if (timestamp == -1) | |
2296 | timestamp = 0; | |
2297 | out_uleb128 (timestamp); | |
2298 | } | |
2299 | ||
01e1a5bc | 2300 | /* Output the filesize. */ |
5496f3c6 NC |
2301 | if (emit_filesize) |
2302 | { | |
2303 | offsetT filesize; | |
2304 | filesize = DWARF2_FILE_SIZE_NAME (files[i].filename, | |
2305 | files[i].dir ? dirs [files [i].dir] : ""); | |
2306 | if (filesize == -1) | |
2307 | filesize = 0; | |
2308 | out_uleb128 (filesize); | |
2309 | } | |
2310 | ||
2311 | /* Output the md5 sum. */ | |
2312 | if (emit_md5) | |
2313 | { | |
2314 | int b; | |
2315 | ||
2316 | for (b = 0; b < NUM_MD5_BYTES; b++) | |
2317 | out_byte (files[i].md5[b]); | |
2318 | } | |
fac0d250 | 2319 | } |
353e2c69 | 2320 | |
5496f3c6 NC |
2321 | if (DWARF2_LINE_VERSION < 5) |
2322 | /* Terminate filename list. */ | |
2323 | out_byte (0); | |
fac0d250 RH |
2324 | } |
2325 | ||
413a266c AM |
2326 | /* Switch to SEC and output a header length field. Return the size of |
2327 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
d025d5e5 MW |
2328 | to the end of the section. EXPR->X_add_number will be set to the |
2329 | negative size of the header. */ | |
413a266c AM |
2330 | |
2331 | static int | |
91d6fa6a | 2332 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
2333 | { |
2334 | symbolS *start_sym; | |
2335 | symbolS *end_sym; | |
2336 | ||
2337 | subseg_set (sec, 0); | |
b57dc16f | 2338 | |
0f8f0c57 NC |
2339 | if (flag_dwarf_sections) |
2340 | { | |
2341 | /* If we are going to put the start and end symbols in different | |
2342 | sections, then we need real symbols, not just fake, local ones. */ | |
2343 | frag_now_fix (); | |
2344 | start_sym = symbol_make (".Ldebug_line_start"); | |
2345 | end_sym = symbol_make (".Ldebug_line_end"); | |
2346 | symbol_set_value_now (start_sym); | |
2347 | } | |
2348 | else | |
0f8f0c57 | 2349 | { |
72354279 | 2350 | start_sym = symbol_temp_new_now_octets (); |
0f8f0c57 NC |
2351 | end_sym = symbol_temp_make (); |
2352 | } | |
413a266c AM |
2353 | |
2354 | /* Total length of the information. */ | |
91d6fa6a NC |
2355 | exp->X_op = O_subtract; |
2356 | exp->X_add_symbol = end_sym; | |
2357 | exp->X_op_symbol = start_sym; | |
413a266c AM |
2358 | |
2359 | switch (DWARF2_FORMAT (sec)) | |
2360 | { | |
2361 | case dwarf2_format_32bit: | |
91d6fa6a NC |
2362 | exp->X_add_number = -4; |
2363 | emit_expr (exp, 4); | |
413a266c AM |
2364 | return 4; |
2365 | ||
2366 | case dwarf2_format_64bit: | |
91d6fa6a | 2367 | exp->X_add_number = -12; |
413a266c | 2368 | out_four (-1); |
91d6fa6a | 2369 | emit_expr (exp, 8); |
413a266c AM |
2370 | return 8; |
2371 | ||
2372 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
2373 | exp->X_add_number = -8; |
2374 | emit_expr (exp, 8); | |
413a266c AM |
2375 | return 8; |
2376 | } | |
2377 | ||
2378 | as_fatal (_("internal error: unknown dwarf2 format")); | |
2379 | return 0; | |
2380 | } | |
2381 | ||
220e750f RH |
2382 | /* Emit the collected .debug_line data. */ |
2383 | ||
2384 | static void | |
a2e22468 | 2385 | out_debug_line (segT line_seg) |
220e750f | 2386 | { |
91d6fa6a | 2387 | expressionS exp; |
02fe846e | 2388 | symbolS *prologue_start, *prologue_end; |
220e750f RH |
2389 | symbolS *line_end; |
2390 | struct line_seg *s; | |
14e777e0 | 2391 | int sizeof_offset; |
220e750f | 2392 | |
031e3350 | 2393 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2394 | sizeof_offset = out_header (line_seg, &exp); |
2395 | line_end = exp.X_add_symbol; | |
220e750f RH |
2396 | |
2397 | /* Version. */ | |
88ebb0a1 | 2398 | out_two (DWARF2_LINE_VERSION); |
220e750f | 2399 | |
5496f3c6 NC |
2400 | if (DWARF2_LINE_VERSION >= 5) |
2401 | { | |
2402 | out_byte (sizeof_address); | |
2403 | out_byte (0); /* Segment Selector size. */ | |
2404 | } | |
220e750f | 2405 | /* Length of the prologue following this length. */ |
02fe846e | 2406 | prologue_start = symbol_temp_make (); |
413a266c | 2407 | prologue_end = symbol_temp_make (); |
02fe846e | 2408 | exp.X_op = O_subtract; |
91d6fa6a | 2409 | exp.X_add_symbol = prologue_end; |
02fe846e AM |
2410 | exp.X_op_symbol = prologue_start; |
2411 | exp.X_add_number = 0; | |
91d6fa6a | 2412 | emit_expr (&exp, sizeof_offset); |
e2b9a97e | 2413 | symbol_set_value_now (prologue_start); |
220e750f RH |
2414 | |
2415 | /* Parameters of the state machine. */ | |
2416 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
5496f3c6 NC |
2417 | if (DWARF2_LINE_VERSION >= 4) |
2418 | out_byte (DWARF2_LINE_MAX_OPS_PER_INSN); | |
220e750f RH |
2419 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); |
2420 | out_byte (DWARF2_LINE_BASE); | |
2421 | out_byte (DWARF2_LINE_RANGE); | |
2422 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
2423 | ||
2424 | /* Standard opcode lengths. */ | |
2425 | out_byte (0); /* DW_LNS_copy */ | |
2426 | out_byte (1); /* DW_LNS_advance_pc */ | |
2427 | out_byte (1); /* DW_LNS_advance_line */ | |
2428 | out_byte (1); /* DW_LNS_set_file */ | |
2429 | out_byte (1); /* DW_LNS_set_column */ | |
2430 | out_byte (0); /* DW_LNS_negate_stmt */ | |
2431 | out_byte (0); /* DW_LNS_set_basic_block */ | |
2432 | out_byte (0); /* DW_LNS_const_add_pc */ | |
2433 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
2434 | out_byte (0); /* DW_LNS_set_prologue_end */ |
2435 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
2436 | out_byte (1); /* DW_LNS_set_isa */ | |
5496f3c6 NC |
2437 | /* We have emitted 12 opcode lengths, so make that this |
2438 | matches up to the opcode base value we have been using. */ | |
2439 | gas_assert (DWARF2_LINE_OPCODE_BASE == 13); | |
220e750f | 2440 | |
d2a54558 | 2441 | out_dir_and_file_list (line_seg, sizeof_offset); |
220e750f | 2442 | |
e2b9a97e | 2443 | symbol_set_value_now (prologue_end); |
220e750f RH |
2444 | |
2445 | /* For each section, emit a statement program. */ | |
ee515fb7 | 2446 | for (s = all_segs; s; s = s->next) |
bcb78b47 NC |
2447 | /* Paranoia - this check should have already have |
2448 | been handled in dwarf2_gen_line_info_1(). */ | |
ef9768e3 | 2449 | if (s->head->head && SEG_NORMAL (s->seg)) |
9aec2026 | 2450 | process_entries (s->seg, s->head->head); |
220e750f | 2451 | |
b40bf0a2 NC |
2452 | if (flag_dwarf_sections) |
2453 | /* We have to switch to the special .debug_line_end section | |
2454 | before emitting the end-of-debug_line symbol. The linker | |
2455 | script arranges for this section to be placed after all the | |
2456 | (potentially garbage collected) .debug_line.<foo> sections. | |
2457 | This section contains the line_end symbol which is used to | |
2458 | compute the size of the linked .debug_line section, as seen | |
2459 | in the DWARF Line Number header. */ | |
5b7c81bd | 2460 | subseg_set (subseg_get (".debug_line_end", false), 0); |
b40bf0a2 | 2461 | |
e2b9a97e | 2462 | symbol_set_value_now (line_end); |
220e750f RH |
2463 | } |
2464 | ||
802f5d9e | 2465 | static void |
bdd3b953 | 2466 | out_debug_ranges (segT ranges_seg, symbolS **ranges_sym) |
802f5d9e NC |
2467 | { |
2468 | unsigned int addr_size = sizeof_address; | |
2469 | struct line_seg *s; | |
91d6fa6a | 2470 | expressionS exp; |
802f5d9e NC |
2471 | unsigned int i; |
2472 | ||
031e3350 | 2473 | memset (&exp, 0, sizeof exp); |
802f5d9e NC |
2474 | subseg_set (ranges_seg, 0); |
2475 | ||
bdd3b953 MW |
2476 | /* For DW_AT_ranges to point at (there is no header, so really start |
2477 | of section, but see out_debug_rnglists). */ | |
2478 | *ranges_sym = symbol_temp_new_now_octets (); | |
2479 | ||
802f5d9e | 2480 | /* Base Address Entry. */ |
7fd3924a | 2481 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2482 | out_byte (0xff); |
7fd3924a | 2483 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2484 | out_byte (0); |
2485 | ||
2486 | /* Range List Entry. */ | |
2487 | for (s = all_segs; s; s = s->next) | |
2488 | { | |
2489 | fragS *frag; | |
2490 | symbolS *beg, *end; | |
2491 | ||
2492 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2493 | beg = symbol_temp_new (s->seg, frag, 0); |
802f5d9e NC |
2494 | s->text_start = beg; |
2495 | ||
2496 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2497 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
802f5d9e NC |
2498 | s->text_end = end; |
2499 | ||
91d6fa6a NC |
2500 | exp.X_op = O_symbol; |
2501 | exp.X_add_symbol = beg; | |
2502 | exp.X_add_number = 0; | |
2503 | emit_expr (&exp, addr_size); | |
802f5d9e | 2504 | |
91d6fa6a NC |
2505 | exp.X_op = O_symbol; |
2506 | exp.X_add_symbol = end; | |
2507 | exp.X_add_number = 0; | |
2508 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
2509 | } |
2510 | ||
2511 | /* End of Range Entry. */ | |
7fd3924a | 2512 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2513 | out_byte (0); |
7fd3924a | 2514 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2515 | out_byte (0); |
2516 | } | |
2517 | ||
bdd3b953 MW |
2518 | static void |
2519 | out_debug_rnglists (segT ranges_seg, symbolS **ranges_sym) | |
2520 | { | |
2521 | expressionS exp; | |
2522 | symbolS *ranges_end; | |
2523 | struct line_seg *s; | |
2524 | ||
2525 | /* Unit length. */ | |
2526 | memset (&exp, 0, sizeof exp); | |
2527 | out_header (ranges_seg, &exp); | |
2528 | ranges_end = exp.X_add_symbol; | |
2529 | ||
2530 | out_two (DWARF2_RNGLISTS_VERSION); | |
2531 | out_byte (sizeof_address); | |
2532 | out_byte (0); /* Segment Selector size. */ | |
2533 | out_four (0); /* Offset entry count. */ | |
2534 | ||
2535 | /* For DW_AT_ranges to point at (must be after the header). */ | |
2536 | *ranges_sym = symbol_temp_new_now_octets (); | |
2537 | ||
2538 | for (s = all_segs; s; s = s->next) | |
2539 | { | |
2540 | fragS *frag; | |
2541 | symbolS *beg, *end; | |
2542 | ||
2543 | out_byte (DW_RLE_start_length); | |
2544 | ||
2545 | frag = first_frag_for_seg (s->seg); | |
2546 | beg = symbol_temp_new (s->seg, frag, 0); | |
2547 | s->text_start = beg; | |
2548 | ||
2549 | frag = last_frag_for_seg (s->seg); | |
2550 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); | |
2551 | s->text_end = end; | |
2552 | ||
2553 | exp.X_op = O_symbol; | |
2554 | exp.X_add_symbol = beg; | |
2555 | exp.X_add_number = 0; | |
2556 | emit_expr (&exp, sizeof_address); | |
2557 | ||
2558 | exp.X_op = O_symbol; | |
2559 | exp.X_add_symbol = end; | |
2560 | exp.X_add_number = 0; | |
2561 | emit_leb128_expr (&exp, 0); | |
2562 | } | |
2563 | ||
2564 | out_byte (DW_RLE_end_of_list); | |
2565 | ||
2566 | symbol_set_value_now (ranges_end); | |
2567 | } | |
2568 | ||
220e750f RH |
2569 | /* Emit data for .debug_aranges. */ |
2570 | ||
58b5739a | 2571 | static void |
a2e22468 | 2572 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 2573 | { |
220e750f | 2574 | unsigned int addr_size = sizeof_address; |
d025d5e5 | 2575 | offsetT size; |
220e750f | 2576 | struct line_seg *s; |
91d6fa6a | 2577 | expressionS exp; |
413a266c | 2578 | symbolS *aranges_end; |
220e750f | 2579 | char *p; |
413a266c | 2580 | int sizeof_offset; |
fac0d250 | 2581 | |
031e3350 | 2582 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2583 | sizeof_offset = out_header (aranges_seg, &exp); |
2584 | aranges_end = exp.X_add_symbol; | |
d025d5e5 | 2585 | size = -exp.X_add_number; |
fac0d250 | 2586 | |
220e750f | 2587 | /* Version. */ |
88ebb0a1 | 2588 | out_two (DWARF2_ARANGES_VERSION); |
d025d5e5 | 2589 | size += 2; |
4dc7ead9 | 2590 | |
220e750f | 2591 | /* Offset to .debug_info. */ |
413a266c | 2592 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
d025d5e5 | 2593 | size += sizeof_offset; |
220e750f RH |
2594 | |
2595 | /* Size of an address (offset portion). */ | |
2596 | out_byte (addr_size); | |
d025d5e5 | 2597 | size++; |
220e750f RH |
2598 | |
2599 | /* Size of a segment descriptor. */ | |
2600 | out_byte (0); | |
d025d5e5 | 2601 | size++; |
220e750f RH |
2602 | |
2603 | /* Align the header. */ | |
d025d5e5 MW |
2604 | while ((size++ % (2 * addr_size)) > 0) |
2605 | out_byte (0); | |
4dc7ead9 | 2606 | |
ee515fb7 | 2607 | for (s = all_segs; s; s = s->next) |
220e750f RH |
2608 | { |
2609 | fragS *frag; | |
2610 | symbolS *beg, *end; | |
2611 | ||
2612 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2613 | beg = symbol_temp_new (s->seg, frag, 0); |
220e750f RH |
2614 | s->text_start = beg; |
2615 | ||
2616 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2617 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
220e750f RH |
2618 | s->text_end = end; |
2619 | ||
91d6fa6a NC |
2620 | exp.X_op = O_symbol; |
2621 | exp.X_add_symbol = beg; | |
2622 | exp.X_add_number = 0; | |
2623 | emit_expr (&exp, addr_size); | |
220e750f | 2624 | |
91d6fa6a NC |
2625 | exp.X_op = O_subtract; |
2626 | exp.X_add_symbol = end; | |
2627 | exp.X_op_symbol = beg; | |
2628 | exp.X_add_number = 0; | |
2629 | emit_expr (&exp, addr_size); | |
220e750f | 2630 | } |
4dc7ead9 | 2631 | |
220e750f RH |
2632 | p = frag_more (2 * addr_size); |
2633 | md_number_to_chars (p, 0, addr_size); | |
2634 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c | 2635 | |
e2b9a97e | 2636 | symbol_set_value_now (aranges_end); |
4dc7ead9 RH |
2637 | } |
2638 | ||
220e750f RH |
2639 | /* Emit data for .debug_abbrev. Note that this must be kept in |
2640 | sync with out_debug_info below. */ | |
fac0d250 | 2641 | |
220e750f | 2642 | static void |
413a266c AM |
2643 | out_debug_abbrev (segT abbrev_seg, |
2644 | segT info_seg ATTRIBUTE_UNUSED, | |
2645 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f | 2646 | { |
dd216e07 | 2647 | int secoff_form; |
220e750f | 2648 | subseg_set (abbrev_seg, 0); |
fac0d250 | 2649 | |
220e750f RH |
2650 | out_uleb128 (1); |
2651 | out_uleb128 (DW_TAG_compile_unit); | |
2652 | out_byte (DW_CHILDREN_no); | |
dd216e07 MW |
2653 | if (DWARF2_VERSION < 4) |
2654 | { | |
2655 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) | |
2656 | secoff_form = DW_FORM_data4; | |
2657 | else | |
2658 | secoff_form = DW_FORM_data8; | |
2659 | } | |
413a266c | 2660 | else |
dd216e07 MW |
2661 | secoff_form = DW_FORM_sec_offset; |
2662 | out_abbrev (DW_AT_stmt_list, secoff_form); | |
220e750f | 2663 | if (all_segs->next == NULL) |
4dc7ead9 | 2664 | { |
220e750f | 2665 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
88ebb0a1 MW |
2666 | if (DWARF2_VERSION < 4) |
2667 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
2668 | else | |
6b9a135d | 2669 | out_abbrev (DW_AT_high_pc, DW_FORM_udata); |
220e750f | 2670 | } |
802f5d9e | 2671 | else |
dd216e07 | 2672 | out_abbrev (DW_AT_ranges, secoff_form); |
49fced12 MW |
2673 | out_abbrev (DW_AT_name, DW_FORM_strp); |
2674 | out_abbrev (DW_AT_comp_dir, DW_FORM_strp); | |
2675 | out_abbrev (DW_AT_producer, DW_FORM_strp); | |
220e750f RH |
2676 | out_abbrev (DW_AT_language, DW_FORM_data2); |
2677 | out_abbrev (0, 0); | |
a987bfc9 RH |
2678 | |
2679 | /* Terminate the abbreviations for this compilation unit. */ | |
2680 | out_byte (0); | |
220e750f | 2681 | } |
4dc7ead9 | 2682 | |
220e750f | 2683 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 2684 | |
220e750f | 2685 | static void |
bdd3b953 MW |
2686 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, |
2687 | symbolS *ranges_sym, symbolS *name_sym, | |
2688 | symbolS *comp_dir_sym, symbolS *producer_sym) | |
220e750f | 2689 | { |
91d6fa6a | 2690 | expressionS exp; |
220e750f | 2691 | symbolS *info_end; |
14e777e0 | 2692 | int sizeof_offset; |
4dc7ead9 | 2693 | |
031e3350 | 2694 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2695 | sizeof_offset = out_header (info_seg, &exp); |
2696 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 2697 | |
220e750f | 2698 | /* DWARF version. */ |
fc0eebac | 2699 | out_two (DWARF2_VERSION); |
4dc7ead9 | 2700 | |
a3b3e858 MW |
2701 | if (DWARF2_VERSION < 5) |
2702 | { | |
2703 | /* .debug_abbrev offset */ | |
2704 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2705 | } | |
2706 | else | |
2707 | { | |
2708 | /* unit (header) type */ | |
2709 | out_byte (DW_UT_compile); | |
2710 | } | |
4dc7ead9 | 2711 | |
220e750f RH |
2712 | /* Target address size. */ |
2713 | out_byte (sizeof_address); | |
fac0d250 | 2714 | |
a3b3e858 MW |
2715 | if (DWARF2_VERSION >= 5) |
2716 | { | |
2717 | /* .debug_abbrev offset */ | |
2718 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2719 | } | |
2720 | ||
220e750f RH |
2721 | /* DW_TAG_compile_unit DIE abbrev */ |
2722 | out_uleb128 (1); | |
fac0d250 | 2723 | |
220e750f | 2724 | /* DW_AT_stmt_list */ |
413a266c AM |
2725 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
2726 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
2727 | ? 4 : 8)); | |
fac0d250 | 2728 | |
802f5d9e | 2729 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 2730 | if (all_segs->next == NULL) |
58b5739a | 2731 | { |
220e750f | 2732 | /* DW_AT_low_pc */ |
91d6fa6a NC |
2733 | exp.X_op = O_symbol; |
2734 | exp.X_add_symbol = all_segs->text_start; | |
2735 | exp.X_add_number = 0; | |
2736 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
2737 | |
2738 | /* DW_AT_high_pc */ | |
88ebb0a1 MW |
2739 | if (DWARF2_VERSION < 4) |
2740 | exp.X_op = O_symbol; | |
2741 | else | |
2742 | { | |
2743 | exp.X_op = O_subtract; | |
2744 | exp.X_op_symbol = all_segs->text_start; | |
2745 | } | |
91d6fa6a NC |
2746 | exp.X_add_symbol = all_segs->text_end; |
2747 | exp.X_add_number = 0; | |
6b9a135d MW |
2748 | if (DWARF2_VERSION < 4) |
2749 | emit_expr (&exp, sizeof_address); | |
2750 | else | |
2751 | emit_leb128_expr (&exp, 0); | |
58b5739a | 2752 | } |
802f5d9e NC |
2753 | else |
2754 | { | |
eb1fe072 NC |
2755 | /* This attribute is emitted if the code is disjoint. */ |
2756 | /* DW_AT_ranges. */ | |
bdd3b953 | 2757 | TC_DWARF2_EMIT_OFFSET (ranges_sym, sizeof_offset); |
802f5d9e | 2758 | } |
58b5739a | 2759 | |
49fced12 MW |
2760 | /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str |
2761 | setup in out_debug_str below. */ | |
2762 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2763 | TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset); | |
2764 | TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset); | |
2765 | ||
2766 | /* DW_AT_language. Yes, this is probably not really MIPS, but the | |
2767 | dwarf2 draft has no standard code for assembler. */ | |
2768 | out_two (DW_LANG_Mips_Assembler); | |
2769 | ||
e2b9a97e | 2770 | symbol_set_value_now (info_end); |
49fced12 MW |
2771 | } |
2772 | ||
2773 | /* Emit the three debug strings needed in .debug_str and setup symbols | |
2774 | to them for use in out_debug_info. */ | |
2775 | static void | |
2776 | out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym, | |
2777 | symbolS **producer_sym) | |
2778 | { | |
2779 | char producer[128]; | |
2780 | const char *comp_dir; | |
2781 | const char *dirname; | |
2782 | char *p; | |
2783 | int len; | |
5496f3c6 | 2784 | int first_file = DWARF2_LINE_VERSION > 4 ? 0 : 1; |
49fced12 MW |
2785 | |
2786 | subseg_set (str_seg, 0); | |
2787 | ||
48b91938 | 2788 | /* DW_AT_name. We don't have the actual file name that was present |
5496f3c6 | 2789 | on the command line, so assume files[first_file] is the main input file. |
48b91938 RH |
2790 | We're not supposed to get called unless at least one line number |
2791 | entry was emitted, so this should always be defined. */ | |
5c4e5fe6 | 2792 | *name_sym = symbol_temp_new_now_octets (); |
7fd3924a | 2793 | if (files_in_use == 0) |
48b91938 | 2794 | abort (); |
5496f3c6 | 2795 | if (files[first_file].dir) |
a7ed1ca2 | 2796 | { |
5496f3c6 | 2797 | dirname = remap_debug_filename (dirs[files[first_file].dir]); |
3d6b762c | 2798 | len = strlen (dirname); |
198f1251 TG |
2799 | #ifdef TE_VMS |
2800 | /* Already has trailing slash. */ | |
2801 | p = frag_more (len); | |
2802 | memcpy (p, dirname, len); | |
2803 | #else | |
a7ed1ca2 | 2804 | p = frag_more (len + 1); |
3d6b762c | 2805 | memcpy (p, dirname, len); |
56487c55 | 2806 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 2807 | #endif |
a7ed1ca2 | 2808 | } |
5496f3c6 | 2809 | len = strlen (files[first_file].filename) + 1; |
48b91938 | 2810 | p = frag_more (len); |
5496f3c6 | 2811 | memcpy (p, files[first_file].filename, len); |
48b91938 | 2812 | |
220e750f | 2813 | /* DW_AT_comp_dir */ |
5c4e5fe6 | 2814 | *comp_dir_sym = symbol_temp_new_now_octets (); |
3d6b762c | 2815 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
2816 | len = strlen (comp_dir) + 1; |
2817 | p = frag_more (len); | |
2818 | memcpy (p, comp_dir, len); | |
fac0d250 | 2819 | |
220e750f | 2820 | /* DW_AT_producer */ |
5c4e5fe6 | 2821 | *producer_sym = symbol_temp_new_now_octets (); |
220e750f RH |
2822 | sprintf (producer, "GNU AS %s", VERSION); |
2823 | len = strlen (producer) + 1; | |
2824 | p = frag_more (len); | |
2825 | memcpy (p, producer, len); | |
fac0d250 RH |
2826 | } |
2827 | ||
1e9cc1c2 NC |
2828 | void |
2829 | dwarf2_init (void) | |
2830 | { | |
1e9cc1c2 | 2831 | last_seg_ptr = &all_segs; |
0ac2b354 AB |
2832 | |
2833 | /* Select the default CIE version to produce here. The global | |
2834 | starts with a value of -1 and will be modified to a valid value | |
2835 | either by the user providing a command line option, or some | |
2836 | targets will select their own default in md_after_parse_args. If | |
2837 | we get here and the global still contains -1 then it is up to us | |
2838 | to pick a sane default. The default we choose is 1, this is the | |
2839 | CIE version gas has produced for a long time, and there seems no | |
2840 | reason to change it yet. */ | |
2841 | if (flag_dwarf_cie_version == -1) | |
2842 | flag_dwarf_cie_version = 1; | |
1e9cc1c2 NC |
2843 | } |
2844 | ||
c6cb92c5 | 2845 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
edc7a80a | 2846 | were any .file/.loc directives, or --gdwarf2 was given, and if the |
df1c40a7 L |
2847 | file has a non-empty .debug_info section and an empty .debug_line |
2848 | section. If we emit .debug_line, and the .debug_info section is | |
2849 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
2850 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
2851 | or --gdwarf2 was given and there were any located instructions | |
2852 | emitted. */ | |
c6cb92c5 | 2853 | |
fac0d250 | 2854 | void |
a2e22468 | 2855 | dwarf2_finish (void) |
fac0d250 | 2856 | { |
220e750f RH |
2857 | segT line_seg; |
2858 | struct line_seg *s; | |
c6cb92c5 NS |
2859 | segT info_seg; |
2860 | int emit_other_sections = 0; | |
df1c40a7 | 2861 | int empty_debug_line = 0; |
c6cb92c5 NS |
2862 | |
2863 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
2864 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 2865 | |
df1c40a7 L |
2866 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
2867 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
2868 | ||
2869 | /* We can't construct a new debug_line section if we already have one. | |
edc7a80a MW |
2870 | Give an error if we have seen any .loc, otherwise trust the user |
2871 | knows what they are doing and want to generate the .debug_line | |
2872 | (and all other debug sections) themselves. */ | |
2873 | if (all_segs && !empty_debug_line && dwarf2_any_loc_directive_seen) | |
df1c40a7 L |
2874 | as_fatal ("duplicate .debug_line sections"); |
2875 | ||
2876 | if ((!all_segs && emit_other_sections) | |
2877 | || (!emit_other_sections && !empty_debug_line)) | |
2878 | /* If there is no line information and no non-empty .debug_info | |
2879 | section, or if there is both a non-empty .debug_info and a non-empty | |
2880 | .debug_line, then we do nothing. */ | |
220e750f | 2881 | return; |
fac0d250 | 2882 | |
220e750f | 2883 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 2884 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 2885 | |
220e750f | 2886 | /* Create and switch to the line number section. */ |
edc7a80a MW |
2887 | if (empty_debug_line) |
2888 | { | |
2889 | line_seg = subseg_new (".debug_line", 0); | |
2890 | bfd_set_section_flags (line_seg, | |
2891 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2892 | } | |
fac0d250 | 2893 | |
5b484628 AM |
2894 | for (s = all_segs; s; s = s->next) |
2895 | { | |
2896 | struct line_subseg *lss; | |
2897 | ||
2898 | for (lss = s->head; lss; lss = lss->next) | |
2899 | if (lss->head) | |
2900 | do_allocate_filenum (lss->head); | |
2901 | } | |
2902 | ||
220e750f | 2903 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 2904 | for (s = all_segs; s; s = s->next) |
fac0d250 | 2905 | { |
91d6fa6a NC |
2906 | struct line_subseg *lss = s->head; |
2907 | struct line_entry **ptail = lss->ptail; | |
220e750f | 2908 | |
62e6b7b3 AO |
2909 | /* Reset the initial view of the first subsection of the |
2910 | section. */ | |
51298b33 | 2911 | if (lss->head && lss->head->loc.u.view) |
62e6b7b3 AO |
2912 | set_or_check_view (lss->head, NULL, NULL); |
2913 | ||
91d6fa6a | 2914 | while ((lss = lss->next) != NULL) |
220e750f | 2915 | { |
62e6b7b3 AO |
2916 | /* Link the first view of subsequent subsections to the |
2917 | previous view. */ | |
51298b33 | 2918 | if (lss->head && lss->head->loc.u.view) |
62e6b7b3 AO |
2919 | set_or_check_view (lss->head, |
2920 | !s->head ? NULL : (struct line_entry *)ptail, | |
2921 | s->head ? s->head->head : NULL); | |
91d6fa6a NC |
2922 | *ptail = lss->head; |
2923 | ptail = lss->ptail; | |
220e750f | 2924 | } |
fac0d250 | 2925 | } |
85a39694 | 2926 | |
edc7a80a MW |
2927 | if (empty_debug_line) |
2928 | out_debug_line (line_seg); | |
85a39694 | 2929 | |
c6cb92c5 | 2930 | /* If this is assembler generated line info, and there is no |
49fced12 MW |
2931 | debug_info already, we need .debug_info, .debug_abbrev and |
2932 | .debug_str sections as well. */ | |
c6cb92c5 | 2933 | if (emit_other_sections) |
220e750f RH |
2934 | { |
2935 | segT abbrev_seg; | |
220e750f | 2936 | segT aranges_seg; |
49fced12 | 2937 | segT str_seg; |
bdd3b953 | 2938 | symbolS *name_sym, *comp_dir_sym, *producer_sym, *ranges_sym; |
4dc7ead9 | 2939 | |
9c2799c2 | 2940 | gas_assert (all_segs); |
7fd3924a | 2941 | |
220e750f RH |
2942 | info_seg = subseg_new (".debug_info", 0); |
2943 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
2944 | aranges_seg = subseg_new (".debug_aranges", 0); | |
49fced12 | 2945 | str_seg = subseg_new (".debug_str", 0); |
ef99799a | 2946 | |
61826503 CE |
2947 | bfd_set_section_flags (info_seg, |
2948 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2949 | bfd_set_section_flags (abbrev_seg, | |
2950 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2951 | bfd_set_section_flags (aranges_seg, | |
2952 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2953 | bfd_set_section_flags (str_seg, | |
2954 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2955 | | SEC_MERGE | SEC_STRINGS); | |
49fced12 | 2956 | str_seg->entsize = 1; |
ef99799a | 2957 | |
ee515fb7 | 2958 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 2959 | |
802f5d9e | 2960 | if (all_segs->next == NULL) |
bdd3b953 | 2961 | ranges_sym = NULL; |
802f5d9e NC |
2962 | else |
2963 | { | |
bdd3b953 MW |
2964 | if (DWARF2_VERSION < 5) |
2965 | { | |
2966 | segT ranges_seg = subseg_new (".debug_ranges", 0); | |
2967 | bfd_set_section_flags (ranges_seg, (SEC_READONLY | |
2968 | | SEC_DEBUGGING | |
2969 | | SEC_OCTETS)); | |
2970 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
2971 | out_debug_ranges (ranges_seg, &ranges_sym); | |
2972 | } | |
2973 | else | |
2974 | { | |
2975 | segT rnglists_seg = subseg_new (".debug_rnglists", 0); | |
2976 | bfd_set_section_flags (rnglists_seg, (SEC_READONLY | |
2977 | | SEC_DEBUGGING | |
2978 | | SEC_OCTETS)); | |
2979 | out_debug_rnglists (rnglists_seg, &ranges_sym); | |
2980 | } | |
802f5d9e NC |
2981 | } |
2982 | ||
220e750f | 2983 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 2984 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
49fced12 | 2985 | out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym); |
bdd3b953 | 2986 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_sym, |
49fced12 | 2987 | name_sym, comp_dir_sym, producer_sym); |
220e750f | 2988 | } |
85a39694 | 2989 | } |
ba8826a8 AO |
2990 | |
2991 | /* Perform any deferred checks pertaining to debug information. */ | |
2992 | ||
2993 | void | |
2994 | dwarf2dbg_final_check (void) | |
2995 | { | |
2996 | /* Perform reset-view checks. Don't evaluate view_assert_failed | |
2997 | recursively: it could be very deep. It's a chain of adds, with | |
2998 | each chain element pointing to the next in X_add_symbol, and | |
2999 | holding the check value in X_op_symbol. */ | |
3000 | while (view_assert_failed) | |
3001 | { | |
723dfee7 | 3002 | expressionS *exp; |
ba8826a8 AO |
3003 | symbolS *sym; |
3004 | offsetT failed; | |
3005 | ||
3006 | gas_assert (!symbol_resolved_p (view_assert_failed)); | |
3007 | ||
723dfee7 | 3008 | exp = symbol_get_value_expression (view_assert_failed); |
ba8826a8 AO |
3009 | sym = view_assert_failed; |
3010 | ||
3011 | /* If view_assert_failed looks like a compound check in the | |
3012 | chain, break it up. */ | |
723dfee7 | 3013 | if (exp->X_op == O_add && exp->X_add_number == 0 && exp->X_unsigned) |
ba8826a8 | 3014 | { |
723dfee7 HPN |
3015 | view_assert_failed = exp->X_add_symbol; |
3016 | sym = exp->X_op_symbol; | |
ba8826a8 AO |
3017 | } |
3018 | else | |
3019 | view_assert_failed = NULL; | |
3020 | ||
3021 | failed = resolve_symbol_value (sym); | |
3022 | if (!symbol_resolved_p (sym) || failed) | |
3023 | { | |
3024 | as_bad (_("view number mismatch")); | |
3025 | break; | |
3026 | } | |
3027 | } | |
3028 | } |