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