Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
b3adc24a | 2 | Copyright (C) 1999-2020 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" |
92eb7b32 | 33 | |
42dbf88c NC |
34 | #ifdef HAVE_LIMITS_H |
35 | #include <limits.h> | |
92625c16 | 36 | #else |
6717891c NC |
37 | #ifdef HAVE_SYS_PARAM_H |
38 | #include <sys/param.h> | |
39 | #endif | |
6256f9dd | 40 | #ifndef INT_MAX |
ee515fb7 | 41 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 42 | #endif |
b8f080d6 | 43 | #endif |
42dbf88c | 44 | |
70658493 | 45 | #include "dwarf2dbg.h" |
a7ed1ca2 | 46 | #include <filenames.h> |
70658493 | 47 | |
56487c55 NC |
48 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
49 | /* We need to decide which character to use as a directory separator. | |
50 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
51 | necessarily mean that the backslash character is the one to use. | |
52 | Some environments, eg Cygwin, can support both naming conventions. | |
53 | So we use the heuristic that we only need to use the backslash if | |
54 | the path is an absolute path starting with a DOS style drive | |
55 | selector. eg C: or D: */ | |
56 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
57 | do \ | |
58 | { \ | |
59 | if (offset > 1 \ | |
7fd3924a AM |
60 | && string[0] != 0 \ |
61 | && string[1] == ':') \ | |
56487c55 NC |
62 | string [offset] = '\\'; \ |
63 | else \ | |
64 | string [offset] = '/'; \ | |
65 | } \ | |
66 | while (0) | |
67 | #else | |
68 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
69 | #endif | |
70 | ||
14e777e0 | 71 | #ifndef DWARF2_FORMAT |
413a266c | 72 | # define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
14e777e0 KB |
73 | #endif |
74 | ||
9605f328 | 75 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 76 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
77 | #endif |
78 | ||
01e1a5bc NC |
79 | #ifndef DWARF2_FILE_NAME |
80 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
81 | #endif | |
82 | ||
83 | #ifndef DWARF2_FILE_TIME_NAME | |
5496f3c6 | 84 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
85 | #endif |
86 | ||
87 | #ifndef DWARF2_FILE_SIZE_NAME | |
5496f3c6 | 88 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
89 | #endif |
90 | ||
fc0eebac | 91 | #ifndef DWARF2_VERSION |
31bf1864 | 92 | #define DWARF2_VERSION dwarf_level |
fc0eebac TG |
93 | #endif |
94 | ||
88ebb0a1 MW |
95 | /* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */ |
96 | #ifndef DWARF2_ARANGES_VERSION | |
97 | #define DWARF2_ARANGES_VERSION 2 | |
98 | #endif | |
99 | ||
8acbe8ff | 100 | /* This implementation outputs version 3 .debug_line information. */ |
88ebb0a1 | 101 | #ifndef DWARF2_LINE_VERSION |
5496f3c6 | 102 | #define DWARF2_LINE_VERSION (dwarf_level > 3 ? dwarf_level : 3) |
88ebb0a1 MW |
103 | #endif |
104 | ||
bdd3b953 MW |
105 | /* The .debug_rnglists has only been in DWARF version 5. */ |
106 | #ifndef DWARF2_RNGLISTS_VERSION | |
107 | #define DWARF2_RNGLISTS_VERSION 5 | |
108 | #endif | |
109 | ||
fac0d250 RH |
110 | #include "subsegs.h" |
111 | ||
fa8f86ff | 112 | #include "dwarf2.h" |
fac0d250 | 113 | |
fac0d250 RH |
114 | /* Since we can't generate the prolog until the body is complete, we |
115 | use three different subsegments for .debug_line: one holding the | |
116 | prolog, one for the directory and filename info, and one for the | |
117 | body ("statement program"). */ | |
118 | #define DL_PROLOG 0 | |
119 | #define DL_FILES 1 | |
120 | #define DL_BODY 2 | |
121 | ||
1737851b BW |
122 | /* If linker relaxation might change offsets in the code, the DWARF special |
123 | opcodes and variable-length operands cannot be used. If this macro is | |
124 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
125 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
453dc3f0 | 126 | # define DWARF2_USE_FIXED_ADVANCE_PC linkrelax |
1737851b BW |
127 | #endif |
128 | ||
33eaf5de | 129 | /* First special line opcode - leave room for the standard opcodes. |
fac0d250 RH |
130 | Note: If you want to change this, you'll have to update the |
131 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
132 | out_debug_line(). */ |
133 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
134 | |
135 | #ifndef DWARF2_LINE_BASE | |
136 | /* Minimum line offset in a special line info. opcode. This value | |
137 | was chosen to give a reasonable range of values. */ | |
138 | # define DWARF2_LINE_BASE -5 | |
139 | #endif | |
140 | ||
141 | /* Range of line offsets in a special line info. opcode. */ | |
142 | #ifndef DWARF2_LINE_RANGE | |
143 | # define DWARF2_LINE_RANGE 14 | |
144 | #endif | |
145 | ||
146 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
147 | /* Define the architecture-dependent minimum instruction length (in | |
148 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 149 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
150 | #endif |
151 | ||
bd0eb99b | 152 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
153 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
154 | ||
5496f3c6 NC |
155 | #ifndef DWARF2_LINE_MAX_OPS_PER_INSN |
156 | #define DWARF2_LINE_MAX_OPS_PER_INSN 1 | |
157 | #endif | |
158 | ||
cb30237e | 159 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
160 | #define SPECIAL_LINE(op) \ |
161 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
162 | ||
163 | /* Given a special op, return the address skip amount (in units of | |
164 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
165 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
166 | ||
cb30237e | 167 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
168 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
169 | ||
62ebcb5c AM |
170 | #ifndef TC_PARSE_CONS_RETURN_NONE |
171 | #define TC_PARSE_CONS_RETURN_NONE BFD_RELOC_NONE | |
172 | #endif | |
173 | ||
ba8826a8 AO |
174 | struct line_entry |
175 | { | |
220e750f | 176 | struct line_entry *next; |
07a53e5c | 177 | symbolS *label; |
220e750f | 178 | struct dwarf2_line_info loc; |
e6c774b4 | 179 | }; |
fac0d250 | 180 | |
ba8826a8 AO |
181 | /* Don't change the offset of next in line_entry. set_or_check_view |
182 | calls in dwarf2_gen_line_info_1 depend on it. */ | |
183 | static char unused[offsetof(struct line_entry, next) ? -1 : 1] | |
184 | ATTRIBUTE_UNUSED; | |
185 | ||
186 | struct line_subseg | |
187 | { | |
220e750f RH |
188 | struct line_subseg *next; |
189 | subsegT subseg; | |
190 | struct line_entry *head; | |
191 | struct line_entry **ptail; | |
e410add4 | 192 | struct line_entry **pmove_tail; |
220e750f | 193 | }; |
353e2c69 | 194 | |
ba8826a8 AO |
195 | struct line_seg |
196 | { | |
220e750f RH |
197 | struct line_seg *next; |
198 | segT seg; | |
199 | struct line_subseg *head; | |
200 | symbolS *text_start; | |
201 | symbolS *text_end; | |
202 | }; | |
203 | ||
204 | /* Collects data for all line table entries during assembly. */ | |
205 | static struct line_seg *all_segs; | |
1e9cc1c2 | 206 | static struct line_seg **last_seg_ptr; |
220e750f | 207 | |
5496f3c6 NC |
208 | #define NUM_MD5_BYTES 16 |
209 | ||
ba8826a8 AO |
210 | struct file_entry |
211 | { | |
5496f3c6 NC |
212 | const char * filename; |
213 | unsigned int dir; | |
714e6c96 | 214 | bfd_boolean auto_assigned; |
5496f3c6 | 215 | unsigned char md5[NUM_MD5_BYTES]; |
220e750f RH |
216 | }; |
217 | ||
218 | /* Table of files used by .debug_line. */ | |
219 | static struct file_entry *files; | |
220 | static unsigned int files_in_use; | |
221 | static unsigned int files_allocated; | |
222 | ||
a7ed1ca2 | 223 | /* Table of directories used by .debug_line. */ |
5496f3c6 NC |
224 | static char ** dirs = NULL; |
225 | static unsigned int dirs_in_use = 0; | |
226 | static unsigned int dirs_allocated = 0; | |
a7ed1ca2 | 227 | |
b34976b6 | 228 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 229 | doing work when there's nothing to do. */ |
1eee4adc | 230 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 231 | |
07a53e5c RH |
232 | /* TRUE when we're supposed to set the basic block mark whenever a |
233 | label is seen. */ | |
234 | bfd_boolean dwarf2_loc_mark_labels; | |
235 | ||
220e750f | 236 | /* Current location as indicated by the most recent .loc directive. */ |
ba8826a8 AO |
237 | static struct dwarf2_line_info current = |
238 | { | |
bd0eb99b | 239 | 1, 1, 0, 0, |
92846e72 | 240 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
ba8826a8 | 241 | 0, NULL |
bd0eb99b | 242 | }; |
220e750f | 243 | |
ba8826a8 AO |
244 | /* This symbol is used to recognize view number forced resets in loc |
245 | lists. */ | |
246 | static symbolS *force_reset_view; | |
247 | ||
248 | /* This symbol evaluates to an expression that, if nonzero, indicates | |
249 | some view assert check failed. */ | |
250 | static symbolS *view_assert_failed; | |
251 | ||
220e750f RH |
252 | /* The size of an address on the target. */ |
253 | static unsigned int sizeof_address; | |
254 | \f | |
c5c0a210 | 255 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 256 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 257 | |
6174d9c8 RH |
258 | /* Create an offset to .dwarf2_*. */ |
259 | ||
260 | static void | |
a2e22468 | 261 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 262 | { |
91d6fa6a | 263 | expressionS exp; |
6174d9c8 | 264 | |
031e3350 | 265 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
266 | exp.X_op = O_symbol; |
267 | exp.X_add_symbol = symbol; | |
268 | exp.X_add_number = 0; | |
269 | emit_expr (&exp, size); | |
6174d9c8 | 270 | } |
c5c0a210 | 271 | #endif |
6174d9c8 | 272 | |
e410add4 | 273 | /* Find or create (if CREATE_P) an entry for SEG+SUBSEG in ALL_SEGS. */ |
220e750f RH |
274 | |
275 | static struct line_subseg * | |
e410add4 | 276 | get_line_subseg (segT seg, subsegT subseg, bfd_boolean create_p) |
220e750f | 277 | { |
5f3fd8b4 | 278 | struct line_seg *s = seg_info (seg)->dwarf2_line_seg; |
91d6fa6a | 279 | struct line_subseg **pss, *lss; |
fac0d250 | 280 | |
1e9cc1c2 NC |
281 | if (s == NULL) |
282 | { | |
e410add4 RS |
283 | if (!create_p) |
284 | return NULL; | |
285 | ||
325801bd | 286 | s = XNEW (struct line_seg); |
1e9cc1c2 NC |
287 | s->next = NULL; |
288 | s->seg = seg; | |
289 | s->head = NULL; | |
290 | *last_seg_ptr = s; | |
291 | last_seg_ptr = &s->next; | |
5f3fd8b4 | 292 | seg_info (seg)->dwarf2_line_seg = s; |
1e9cc1c2 | 293 | } |
5496f3c6 | 294 | |
1e9cc1c2 | 295 | gas_assert (seg == s->seg); |
220e750f | 296 | |
91d6fa6a | 297 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 298 | { |
91d6fa6a | 299 | if (lss->subseg == subseg) |
ee515fb7 | 300 | goto found_subseg; |
91d6fa6a | 301 | if (lss->subseg > subseg) |
220e750f | 302 | break; |
fac0d250 | 303 | } |
220e750f | 304 | |
325801bd | 305 | lss = XNEW (struct line_subseg); |
91d6fa6a NC |
306 | lss->next = *pss; |
307 | lss->subseg = subseg; | |
308 | lss->head = NULL; | |
309 | lss->ptail = &lss->head; | |
e410add4 | 310 | lss->pmove_tail = &lss->head; |
91d6fa6a | 311 | *pss = lss; |
220e750f RH |
312 | |
313 | found_subseg: | |
91d6fa6a | 314 | return lss; |
fac0d250 RH |
315 | } |
316 | ||
ba8826a8 AO |
317 | /* (Un)reverse the line_entry list starting from H. */ |
318 | ||
319 | static struct line_entry * | |
320 | reverse_line_entry_list (struct line_entry *h) | |
321 | { | |
322 | struct line_entry *p = NULL, *e, *n; | |
323 | ||
324 | for (e = h; e; e = n) | |
325 | { | |
326 | n = e->next; | |
327 | e->next = p; | |
328 | p = e; | |
329 | } | |
330 | return p; | |
331 | } | |
332 | ||
333 | /* Compute the view for E based on the previous entry P. If we | |
334 | introduce an (undefined) view symbol for P, and H is given (P must | |
335 | be the tail in this case), introduce view symbols for earlier list | |
336 | entries as well, until one of them is constant. */ | |
337 | ||
338 | static void | |
339 | set_or_check_view (struct line_entry *e, struct line_entry *p, | |
340 | struct line_entry *h) | |
341 | { | |
342 | expressionS viewx; | |
343 | ||
344 | memset (&viewx, 0, sizeof (viewx)); | |
345 | viewx.X_unsigned = 1; | |
346 | ||
347 | /* First, compute !(E->label > P->label), to tell whether or not | |
348 | we're to reset the view number. If we can't resolve it to a | |
349 | constant, keep it symbolic. */ | |
350 | if (!p || (e->loc.view == force_reset_view && force_reset_view)) | |
351 | { | |
352 | viewx.X_op = O_constant; | |
353 | viewx.X_add_number = 0; | |
354 | viewx.X_add_symbol = NULL; | |
355 | viewx.X_op_symbol = NULL; | |
356 | } | |
357 | else | |
358 | { | |
359 | viewx.X_op = O_gt; | |
360 | viewx.X_add_number = 0; | |
361 | viewx.X_add_symbol = e->label; | |
362 | viewx.X_op_symbol = p->label; | |
363 | resolve_expression (&viewx); | |
364 | if (viewx.X_op == O_constant) | |
365 | viewx.X_add_number = !viewx.X_add_number; | |
366 | else | |
367 | { | |
368 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
369 | viewx.X_add_number = 0; | |
370 | viewx.X_op_symbol = NULL; | |
371 | viewx.X_op = O_logical_not; | |
372 | } | |
373 | } | |
374 | ||
375 | if (S_IS_DEFINED (e->loc.view) && symbol_constant_p (e->loc.view)) | |
376 | { | |
377 | expressionS *value = symbol_get_value_expression (e->loc.view); | |
378 | /* We can't compare the view numbers at this point, because in | |
379 | VIEWX we've only determined whether we're to reset it so | |
380 | far. */ | |
381 | if (viewx.X_op == O_constant) | |
382 | { | |
383 | if (!value->X_add_number != !viewx.X_add_number) | |
384 | as_bad (_("view number mismatch")); | |
385 | } | |
386 | /* Record the expression to check it later. It is the result of | |
387 | a logical not, thus 0 or 1. We just add up all such deferred | |
388 | expressions, and resolve it at the end. */ | |
389 | else if (!value->X_add_number) | |
390 | { | |
391 | symbolS *deferred = make_expr_symbol (&viewx); | |
392 | if (view_assert_failed) | |
393 | { | |
394 | expressionS chk; | |
031e3350 | 395 | |
ba8826a8 AO |
396 | memset (&chk, 0, sizeof (chk)); |
397 | chk.X_unsigned = 1; | |
398 | chk.X_op = O_add; | |
399 | chk.X_add_number = 0; | |
400 | chk.X_add_symbol = view_assert_failed; | |
401 | chk.X_op_symbol = deferred; | |
402 | deferred = make_expr_symbol (&chk); | |
403 | } | |
404 | view_assert_failed = deferred; | |
405 | } | |
406 | } | |
407 | ||
408 | if (viewx.X_op != O_constant || viewx.X_add_number) | |
409 | { | |
410 | expressionS incv; | |
411 | ||
412 | if (!p->loc.view) | |
413 | { | |
414 | p->loc.view = symbol_temp_make (); | |
415 | gas_assert (!S_IS_DEFINED (p->loc.view)); | |
416 | } | |
417 | ||
418 | memset (&incv, 0, sizeof (incv)); | |
419 | incv.X_unsigned = 1; | |
420 | incv.X_op = O_symbol; | |
421 | incv.X_add_symbol = p->loc.view; | |
422 | incv.X_add_number = 1; | |
423 | ||
424 | if (viewx.X_op == O_constant) | |
425 | { | |
426 | gas_assert (viewx.X_add_number == 1); | |
427 | viewx = incv; | |
428 | } | |
429 | else | |
430 | { | |
431 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
432 | viewx.X_add_number = 0; | |
433 | viewx.X_op_symbol = make_expr_symbol (&incv); | |
434 | viewx.X_op = O_multiply; | |
435 | } | |
436 | } | |
437 | ||
438 | if (!S_IS_DEFINED (e->loc.view)) | |
439 | { | |
440 | symbol_set_value_expression (e->loc.view, &viewx); | |
38cf168b | 441 | S_SET_SEGMENT (e->loc.view, expr_section); |
ba8826a8 AO |
442 | symbol_set_frag (e->loc.view, &zero_address_frag); |
443 | } | |
444 | ||
445 | /* Define and attempt to simplify any earlier views needed to | |
446 | compute E's. */ | |
447 | if (h && p && p->loc.view && !S_IS_DEFINED (p->loc.view)) | |
448 | { | |
449 | struct line_entry *h2; | |
450 | /* Reverse the list to avoid quadratic behavior going backwards | |
451 | in a single-linked list. */ | |
452 | struct line_entry *r = reverse_line_entry_list (h); | |
453 | ||
454 | gas_assert (r == p); | |
455 | /* Set or check views until we find a defined or absent view. */ | |
456 | do | |
62e6b7b3 AO |
457 | { |
458 | /* Do not define the head of a (sub?)segment view while | |
459 | handling others. It would be defined too early, without | |
460 | regard to the last view of other subsegments. | |
461 | set_or_check_view will be called for every head segment | |
462 | that needs it. */ | |
463 | if (r == h) | |
464 | break; | |
465 | set_or_check_view (r, r->next, NULL); | |
466 | } | |
ba8826a8 AO |
467 | while (r->next && r->next->loc.view && !S_IS_DEFINED (r->next->loc.view) |
468 | && (r = r->next)); | |
469 | ||
470 | /* Unreverse the list, so that we can go forward again. */ | |
471 | h2 = reverse_line_entry_list (p); | |
472 | gas_assert (h2 == h); | |
473 | ||
474 | /* Starting from the last view we just defined, attempt to | |
475 | simplify the view expressions, until we do so to P. */ | |
476 | do | |
477 | { | |
62e6b7b3 AO |
478 | /* The head view of a subsegment may remain undefined while |
479 | handling other elements, before it is linked to the last | |
480 | view of the previous subsegment. */ | |
481 | if (r == h) | |
482 | continue; | |
ba8826a8 AO |
483 | gas_assert (S_IS_DEFINED (r->loc.view)); |
484 | resolve_expression (symbol_get_value_expression (r->loc.view)); | |
485 | } | |
486 | while (r != p && (r = r->next)); | |
487 | ||
488 | /* Now that we've defined and computed all earlier views that might | |
489 | be needed to compute E's, attempt to simplify it. */ | |
490 | resolve_expression (symbol_get_value_expression (e->loc.view)); | |
491 | } | |
492 | } | |
493 | ||
6a50d470 | 494 | /* Record an entry for LOC occurring at LABEL. */ |
07a53e5c RH |
495 | |
496 | static void | |
6a50d470 | 497 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) |
07a53e5c | 498 | { |
6a50d470 | 499 | struct line_subseg *lss; |
07a53e5c RH |
500 | struct line_entry *e; |
501 | ||
325801bd | 502 | e = XNEW (struct line_entry); |
07a53e5c | 503 | e->next = NULL; |
6a50d470 | 504 | e->label = label; |
07a53e5c RH |
505 | e->loc = *loc; |
506 | ||
e410add4 | 507 | lss = get_line_subseg (now_seg, now_subseg, TRUE); |
ba8826a8 | 508 | |
62e6b7b3 AO |
509 | /* Subseg heads are chained to previous subsegs in |
510 | dwarf2_finish. */ | |
511 | if (loc->view && lss->head) | |
ba8826a8 | 512 | set_or_check_view (e, |
62e6b7b3 | 513 | (struct line_entry *)lss->ptail, |
ba8826a8 AO |
514 | lss->head); |
515 | ||
6a50d470 RS |
516 | *lss->ptail = e; |
517 | lss->ptail = &e->next; | |
07a53e5c RH |
518 | } |
519 | ||
436d9e46 | 520 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 521 | |
220e750f | 522 | void |
a2e22468 | 523 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 524 | { |
1ea5c325 MS |
525 | static unsigned int line = -1; |
526 | static unsigned int filenum = -1; | |
220e750f | 527 | |
6a50d470 RS |
528 | symbolS *sym; |
529 | ||
220e750f | 530 | /* Early out for as-yet incomplete location information. */ |
5496f3c6 NC |
531 | if (loc->line == 0) |
532 | return; | |
533 | if (loc->filenum == 0 && DWARF2_LINE_VERSION < 5) | |
220e750f RH |
534 | return; |
535 | ||
ffa554ed GK |
536 | /* Don't emit sequences of line symbols for the same line when the |
537 | symbols apply to assembler code. It is necessary to emit | |
538 | duplicate line symbols when a compiler asks for them, because GDB | |
539 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 540 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 541 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
542 | return; |
543 | ||
544 | line = loc->line; | |
545 | filenum = loc->filenum; | |
546 | ||
453dc3f0 NC |
547 | if (linkrelax) |
548 | { | |
549 | char name[120]; | |
550 | ||
551 | /* Use a non-fake name for the line number location, | |
552 | so that it can be referred to by relocations. */ | |
553 | sprintf (name, ".Loc.%u.%u", line, filenum); | |
e01e1cee | 554 | sym = symbol_new (name, now_seg, frag_now, ofs); |
453dc3f0 NC |
555 | } |
556 | else | |
e01e1cee | 557 | sym = symbol_temp_new (now_seg, frag_now, ofs); |
6a50d470 | 558 | dwarf2_gen_line_info_1 (sym, loc); |
220e750f | 559 | } |
fac0d250 | 560 | |
5496f3c6 NC |
561 | static const char * |
562 | get_basename (const char * pathname) | |
563 | { | |
564 | const char * file; | |
565 | ||
566 | file = lbasename (pathname); | |
567 | /* Don't make empty string from / or A: from A:/ . */ | |
568 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
569 | if (file <= pathname + 3) | |
570 | file = pathname; | |
571 | #else | |
572 | if (file == pathname + 1) | |
573 | file = pathname; | |
574 | #endif | |
575 | return file; | |
576 | } | |
577 | ||
578 | static unsigned int | |
579 | get_directory_table_entry (const char * dirname, | |
580 | size_t dirlen, | |
581 | bfd_boolean can_use_zero) | |
582 | { | |
583 | unsigned int d; | |
584 | ||
585 | if (dirlen == 0) | |
586 | return 0; | |
587 | ||
588 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR | |
589 | if (IS_DIR_SEPARATOR (dirname[dirlen - 1])) | |
590 | { | |
591 | -- dirlen; | |
592 | if (dirlen == 0) | |
593 | return 0; | |
594 | } | |
595 | #endif | |
596 | ||
597 | for (d = 0; d < dirs_in_use; ++d) | |
598 | { | |
599 | if (dirs[d] != NULL | |
600 | && filename_ncmp (dirname, dirs[d], dirlen) == 0 | |
601 | && dirs[d][dirlen] == '\0') | |
602 | return d; | |
603 | } | |
604 | ||
605 | if (can_use_zero) | |
606 | { | |
607 | if (dirs == NULL || dirs[0] == NULL) | |
608 | d = 0; | |
609 | } | |
610 | else if (d == 0) | |
611 | d = 1; | |
612 | ||
613 | if (d >= dirs_allocated) | |
614 | { | |
615 | unsigned int old = dirs_allocated; | |
616 | ||
617 | dirs_allocated = d + 32; | |
618 | dirs = XRESIZEVEC (char *, dirs, dirs_allocated); | |
619 | memset (dirs + old, 0, (dirs_allocated - old) * sizeof (char *)); | |
620 | } | |
621 | ||
622 | dirs[d] = xmemdup0 (dirname, dirlen); | |
623 | if (dirs_in_use <= d) | |
624 | dirs_in_use = d + 1; | |
625 | ||
626 | return d; | |
627 | } | |
628 | ||
714e6c96 NC |
629 | static bfd_boolean |
630 | assign_file_to_slot (unsigned long i, const char *file, unsigned int dir, bfd_boolean auto_assign) | |
631 | { | |
632 | if (i >= files_allocated) | |
633 | { | |
634 | unsigned int old = files_allocated; | |
635 | ||
636 | files_allocated = i + 32; | |
637 | /* Catch wraparound. */ | |
638 | if (files_allocated <= old) | |
639 | { | |
640 | as_bad (_("file number %lu is too big"), (unsigned long) i); | |
641 | return FALSE; | |
642 | } | |
643 | ||
644 | files = XRESIZEVEC (struct file_entry, files, files_allocated); | |
645 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
646 | } | |
647 | ||
648 | files[i].filename = file; | |
649 | files[i].dir = dir; | |
650 | files[i].auto_assigned = auto_assign; | |
651 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
652 | ||
653 | if (files_in_use < i + 1) | |
654 | files_in_use = i + 1; | |
655 | ||
656 | return TRUE; | |
657 | } | |
658 | ||
5496f3c6 NC |
659 | /* Get a .debug_line file number for PATHNAME. If there is a |
660 | directory component to PATHNAME, then this will be stored | |
661 | in the directory table, if it is not already present. | |
662 | Returns the slot number allocated to that filename or -1 | |
663 | if there was a problem. */ | |
664 | ||
665 | static signed int | |
666 | allocate_filenum (const char * pathname) | |
667 | { | |
668 | static signed int last_used = -1, last_used_dir_len = 0; | |
669 | const char *file; | |
670 | size_t dir_len; | |
671 | unsigned int i, dir; | |
672 | ||
673 | /* Short circuit the common case of adding the same pathname | |
674 | as last time. */ | |
675 | if (last_used != -1) | |
676 | { | |
677 | const char * dirname = NULL; | |
678 | ||
679 | if (dirs != NULL) | |
680 | dirname = dirs[files[last_used].dir]; | |
681 | ||
682 | if (dirname == NULL) | |
683 | { | |
684 | if (filename_cmp (pathname, files[last_used].filename) == 0) | |
685 | return last_used; | |
686 | } | |
687 | else | |
688 | { | |
689 | if (filename_ncmp (pathname, dirname, last_used_dir_len) == 0 | |
690 | && IS_DIR_SEPARATOR (pathname [last_used_dir_len]) | |
691 | && filename_cmp (pathname + last_used_dir_len + 1, | |
692 | files[last_used].filename) == 0) | |
693 | return last_used; | |
694 | } | |
695 | } | |
696 | ||
697 | file = get_basename (pathname); | |
698 | dir_len = file - pathname; | |
699 | ||
700 | dir = get_directory_table_entry (pathname, dir_len, FALSE); | |
701 | ||
714e6c96 | 702 | /* Do not use slot-0. That is specifically reserved for use by |
5496f3c6 NC |
703 | the '.file 0 "name"' directive. */ |
704 | for (i = 1; i < files_in_use; ++i) | |
705 | if (files[i].dir == dir | |
706 | && files[i].filename | |
707 | && filename_cmp (file, files[i].filename) == 0) | |
708 | { | |
709 | last_used = i; | |
710 | last_used_dir_len = dir_len; | |
711 | return i; | |
712 | } | |
713 | ||
714e6c96 NC |
714 | if (!assign_file_to_slot (i, file, dir, TRUE)) |
715 | return -1; | |
5496f3c6 | 716 | |
5496f3c6 NC |
717 | last_used = i; |
718 | last_used_dir_len = dir_len; | |
719 | ||
720 | return i; | |
721 | } | |
722 | ||
723 | /* Allocate slot NUM in the .debug_line file table to FILENAME. | |
724 | If DIRNAME is not NULL or there is a directory component to FILENAME | |
725 | then this will be stored in the directory table, if not already present. | |
726 | if WITH_MD5 is TRUE then there is a md5 value in generic_bignum. | |
727 | Returns TRUE if allocation succeeded, FALSE otherwise. */ | |
728 | ||
729 | static bfd_boolean | |
730 | allocate_filename_to_slot (const char * dirname, | |
731 | const char * filename, | |
732 | unsigned int num, | |
733 | bfd_boolean with_md5) | |
734 | { | |
735 | const char *file; | |
736 | size_t dirlen; | |
737 | unsigned int i, d; | |
738 | ||
739 | /* Short circuit the common case of adding the same pathname | |
740 | as last time. */ | |
741 | if (num < files_allocated && files[num].filename != NULL) | |
742 | { | |
743 | const char * dir = NULL; | |
744 | ||
745 | if (dirs) | |
746 | dir = dirs[files[num].dir]; | |
747 | ||
748 | if (with_md5 | |
749 | && memcmp (generic_bignum, files[num].md5, NUM_MD5_BYTES) != 0) | |
750 | goto fail; | |
751 | ||
752 | if (dirname != NULL) | |
753 | { | |
754 | if (dir != NULL && filename_cmp (dir, dirname) != 0) | |
755 | goto fail; | |
756 | ||
757 | if (filename_cmp (filename, files[num].filename) != 0) | |
758 | goto fail; | |
759 | ||
760 | /* If the filenames match, but the directory table entry was | |
761 | empty, then fill it with the provided directory name. */ | |
762 | if (dir == NULL) | |
763 | dirs[files[num].dir] = xmemdup0 (dirname, strlen (dirname)); | |
764 | ||
765 | return TRUE; | |
766 | } | |
767 | else if (dir != NULL) | |
768 | { | |
769 | dirlen = strlen (dir); | |
770 | if (filename_ncmp (filename, dir, dirlen) == 0 | |
771 | && IS_DIR_SEPARATOR (filename [dirlen]) | |
772 | && filename_cmp (filename + dirlen + 1, files[num].filename) == 0) | |
773 | return TRUE; | |
774 | } | |
775 | else /* dir == NULL */ | |
776 | { | |
777 | file = get_basename (filename); | |
778 | if (filename_cmp (file, files[num].filename) == 0) | |
779 | { | |
780 | if (file > filename) | |
781 | /* The filenames match, but the directory table entry is empty. | |
782 | Fill it with the provided directory name. */ | |
783 | dirs[files[num].dir] = xmemdup0 (filename, file - filename); | |
784 | return TRUE; | |
785 | } | |
786 | } | |
787 | ||
788 | fail: | |
714e6c96 NC |
789 | /* If NUM was previously allocated automatically then |
790 | choose another slot for it, so that we can reuse NUM. */ | |
791 | if (files[num].auto_assigned) | |
792 | { | |
793 | /* Find an unused slot. */ | |
794 | for (i = 1; i < files_in_use; ++i) | |
795 | if (files[i].filename == NULL) | |
796 | break; | |
797 | if (! assign_file_to_slot (i, files[num].filename, files[num].dir, TRUE)) | |
798 | return FALSE; | |
799 | files[num].filename = NULL; | |
800 | } | |
801 | else | |
802 | { | |
803 | as_bad (_("file table slot %u is already occupied by a different file (%s%s%s vs %s%s%s)"), | |
804 | num, | |
805 | dir == NULL ? "" : dir, | |
806 | dir == NULL ? "" : "/", | |
807 | files[num].filename, | |
808 | dirname == NULL ? "" : dirname, | |
809 | dirname == NULL ? "" : "/", | |
810 | filename); | |
811 | return FALSE; | |
812 | } | |
5496f3c6 NC |
813 | } |
814 | ||
815 | if (dirname == NULL) | |
816 | { | |
817 | dirname = filename; | |
818 | file = get_basename (filename); | |
819 | dirlen = file - filename; | |
820 | } | |
821 | else | |
822 | { | |
823 | dirlen = strlen (dirname); | |
824 | file = filename; | |
825 | } | |
826 | ||
827 | d = get_directory_table_entry (dirname, dirlen, num == 0); | |
828 | i = num; | |
829 | ||
714e6c96 NC |
830 | if (! assign_file_to_slot (i, file, d, FALSE)) |
831 | return FALSE; | |
5496f3c6 | 832 | |
5496f3c6 NC |
833 | if (with_md5) |
834 | { | |
835 | if (target_big_endian) | |
836 | { | |
837 | /* md5's are stored in litte endian format. */ | |
838 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
839 | unsigned int byte = NUM_MD5_BYTES; | |
840 | unsigned int bignum_index = 0; | |
841 | ||
842 | while (bits_remaining) | |
843 | { | |
844 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
845 | valueT bignum_value = generic_bignum [bignum_index]; | |
846 | bignum_index ++; | |
847 | ||
848 | while (bignum_bits_remaining) | |
849 | { | |
850 | files[i].md5[--byte] = bignum_value & 0xff; | |
851 | bignum_value >>= 8; | |
852 | bignum_bits_remaining -= 8; | |
853 | bits_remaining -= 8; | |
854 | } | |
855 | } | |
856 | } | |
857 | else | |
858 | { | |
859 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
860 | unsigned int byte = 0; | |
861 | unsigned int bignum_index = 0; | |
862 | ||
863 | while (bits_remaining) | |
864 | { | |
865 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
866 | valueT bignum_value = generic_bignum [bignum_index]; | |
867 | ||
868 | bignum_index ++; | |
869 | ||
870 | while (bignum_bits_remaining) | |
871 | { | |
872 | files[i].md5[byte++] = bignum_value & 0xff; | |
873 | bignum_value >>= 8; | |
874 | bignum_bits_remaining -= 8; | |
875 | bits_remaining -= 8; | |
876 | } | |
877 | } | |
878 | } | |
879 | } | |
880 | else | |
881 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
882 | ||
5496f3c6 NC |
883 | return TRUE; |
884 | } | |
885 | ||
ecea7679 RH |
886 | /* Returns the current source information. If .file directives have |
887 | been encountered, the info for the corresponding source file is | |
888 | returned. Otherwise, the info for the assembly source file is | |
889 | returned. */ | |
890 | ||
220e750f | 891 | void |
a2e22468 | 892 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
893 | { |
894 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 895 | { |
ba8826a8 AO |
896 | const char *filename; |
897 | ||
898 | memset (line, 0, sizeof (*line)); | |
899 | filename = as_where (&line->line); | |
5496f3c6 NC |
900 | line->filenum = allocate_filenum (filename); |
901 | /* FIXME: We should check the return value from allocate_filenum. */ | |
220e750f | 902 | line->column = 0; |
bd0eb99b | 903 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 904 | line->isa = current.isa; |
92846e72 | 905 | line->discriminator = current.discriminator; |
ba8826a8 | 906 | line->view = NULL; |
fac0d250 | 907 | } |
220e750f RH |
908 | else |
909 | *line = current; | |
fac0d250 RH |
910 | } |
911 | ||
7fd3924a | 912 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
913 | machine of isa changes when assembler debug info is enabled. */ |
914 | ||
915 | void | |
916 | dwarf2_set_isa (unsigned int isa) | |
917 | { | |
918 | current.isa = isa; | |
919 | } | |
920 | ||
220e750f RH |
921 | /* Called for each machine instruction, or relatively atomic group of |
922 | machine instructions (ie built-in macro). The instruction or group | |
923 | is SIZE bytes in length. If dwarf2 line number generation is called | |
924 | for, emit a line statement appropriately. */ | |
353e2c69 | 925 | |
220e750f | 926 | void |
a2e22468 | 927 | dwarf2_emit_insn (int size) |
fac0d250 | 928 | { |
220e750f | 929 | struct dwarf2_line_info loc; |
fac0d250 | 930 | |
ba8826a8 AO |
931 | if (debug_type != DEBUG_DWARF2 |
932 | ? !dwarf2_loc_directive_seen | |
933 | : !seen_at_least_1_file ()) | |
220e750f | 934 | return; |
7fd3924a AM |
935 | |
936 | dwarf2_where (&loc); | |
b6675117 | 937 | |
71250b94 | 938 | dwarf2_gen_line_info ((frag_now_fix_octets () - size) / OCTETS_PER_BYTE, &loc); |
661ba50f BW |
939 | dwarf2_consume_line_info (); |
940 | } | |
941 | ||
e410add4 RS |
942 | /* Move all previously-emitted line entries for the current position by |
943 | DELTA bytes. This function cannot be used to move the same entries | |
944 | twice. */ | |
945 | ||
946 | void | |
947 | dwarf2_move_insn (int delta) | |
948 | { | |
949 | struct line_subseg *lss; | |
950 | struct line_entry *e; | |
951 | valueT now; | |
952 | ||
953 | if (delta == 0) | |
954 | return; | |
955 | ||
956 | lss = get_line_subseg (now_seg, now_subseg, FALSE); | |
957 | if (!lss) | |
958 | return; | |
959 | ||
960 | now = frag_now_fix (); | |
961 | while ((e = *lss->pmove_tail)) | |
962 | { | |
963 | if (S_GET_VALUE (e->label) == now) | |
964 | S_SET_VALUE (e->label, now + delta); | |
965 | lss->pmove_tail = &e->next; | |
966 | } | |
967 | } | |
968 | ||
661ba50f BW |
969 | /* Called after the current line information has been either used with |
970 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
971 | This resets the state of the line number information to reflect that | |
972 | it has been used. */ | |
973 | ||
974 | void | |
975 | dwarf2_consume_line_info (void) | |
976 | { | |
977 | /* Unless we generate DWARF2 debugging information for each | |
978 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 979 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
980 | |
981 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
982 | | DWARF2_FLAG_PROLOGUE_END | |
983 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 984 | current.discriminator = 0; |
3a00b02d | 985 | current.view = NULL; |
220e750f | 986 | } |
fac0d250 | 987 | |
07a53e5c RH |
988 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
989 | is enabled, emit a basic block marker. */ | |
990 | ||
991 | void | |
992 | dwarf2_emit_label (symbolS *label) | |
993 | { | |
994 | struct dwarf2_line_info loc; | |
995 | ||
996 | if (!dwarf2_loc_mark_labels) | |
997 | return; | |
998 | if (S_GET_SEGMENT (label) != now_seg) | |
999 | return; | |
fd361982 | 1000 | if (!(bfd_section_flags (now_seg) & SEC_CODE)) |
07a53e5c | 1001 | return; |
7fd3924a AM |
1002 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
1003 | return; | |
1004 | ||
1005 | dwarf2_where (&loc); | |
07a53e5c RH |
1006 | |
1007 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1008 | ||
6a50d470 | 1009 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 1010 | dwarf2_consume_line_info (); |
07a53e5c RH |
1011 | } |
1012 | ||
ecb4347a DJ |
1013 | /* Handle two forms of .file directive: |
1014 | - Pass .file "source.c" to s_app_file | |
1015 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 1016 | |
68d20676 | 1017 | If an entry is added to the file table, return a pointer to the filename. */ |
ecb4347a DJ |
1018 | |
1019 | char * | |
68d20676 | 1020 | dwarf2_directive_filename (void) |
220e750f | 1021 | { |
b0b3ea7e | 1022 | bfd_boolean with_md5 = FALSE; |
8f02ae5b | 1023 | valueT num; |
e46d99eb | 1024 | char *filename; |
5496f3c6 | 1025 | const char * dirname = NULL; |
220e750f RH |
1026 | int filename_len; |
1027 | ||
1028 | /* Continue to accept a bare string and pass it off. */ | |
1029 | SKIP_WHITESPACE (); | |
1030 | if (*input_line_pointer == '"') | |
fac0d250 | 1031 | { |
220e750f | 1032 | s_app_file (0); |
ecb4347a | 1033 | return NULL; |
fac0d250 RH |
1034 | } |
1035 | ||
220e750f | 1036 | num = get_absolute_expression (); |
220e750f | 1037 | |
5496f3c6 | 1038 | if ((offsetT) num < 1 && DWARF2_LINE_VERSION < 5) |
fac0d250 | 1039 | { |
0e389e77 | 1040 | as_bad (_("file number less than one")); |
84d9ab33 | 1041 | ignore_rest_of_line (); |
ecb4347a | 1042 | return NULL; |
fac0d250 RH |
1043 | } |
1044 | ||
5496f3c6 NC |
1045 | /* FIXME: Should we allow ".file <N>\n" as an expression meaning |
1046 | "switch back to the already allocated file <N> as the current | |
1047 | file" ? */ | |
84d9ab33 NC |
1048 | |
1049 | filename = demand_copy_C_string (&filename_len); | |
1050 | if (filename == NULL) | |
1051 | /* demand_copy_C_string will have already generated an error message. */ | |
1052 | return NULL; | |
1053 | ||
5496f3c6 NC |
1054 | /* For DWARF-5 support we also accept: |
1055 | .file <NUM> ["<dir>"] "<file>" [md5 <NUM>] */ | |
1056 | if (DWARF2_LINE_VERSION > 4) | |
1057 | { | |
1058 | SKIP_WHITESPACE (); | |
1059 | if (*input_line_pointer == '"') | |
1060 | { | |
1061 | dirname = filename; | |
1062 | filename = demand_copy_C_string (&filename_len); | |
1063 | SKIP_WHITESPACE (); | |
1064 | } | |
1065 | ||
1066 | if (strncmp (input_line_pointer, "md5", 3) == 0) | |
1067 | { | |
1068 | input_line_pointer += 3; | |
1069 | SKIP_WHITESPACE (); | |
1070 | ||
1071 | expressionS exp; | |
1072 | expression_and_evaluate (& exp); | |
1073 | if (exp.X_op != O_big) | |
1074 | as_bad (_("md5 value too small or not a constant")); | |
1075 | else | |
1076 | with_md5 = TRUE; | |
1077 | } | |
1078 | } | |
1079 | ||
84d9ab33 NC |
1080 | demand_empty_rest_of_line (); |
1081 | ||
7cadeb2c AM |
1082 | /* A .file directive implies compiler generated debug information is |
1083 | being supplied. Turn off gas generated debug info. */ | |
1084 | debug_type = DEBUG_NONE; | |
1085 | ||
8f02ae5b AM |
1086 | if (num != (unsigned int) num |
1087 | || num >= (size_t) -1 / sizeof (struct file_entry) - 32) | |
220e750f | 1088 | { |
8f02ae5b | 1089 | as_bad (_("file number %lu is too big"), (unsigned long) num); |
ecb4347a | 1090 | return NULL; |
249e3833 | 1091 | } |
220e750f | 1092 | |
5496f3c6 NC |
1093 | if (! allocate_filename_to_slot (dirname, filename, (unsigned int) num, |
1094 | with_md5)) | |
1095 | return NULL; | |
ecb4347a DJ |
1096 | |
1097 | return filename; | |
fac0d250 RH |
1098 | } |
1099 | ||
68d20676 NC |
1100 | /* Calls dwarf2_directive_filename, but discards its result. |
1101 | Used in pseudo-op tables where the function result is ignored. */ | |
1102 | ||
1103 | void | |
1104 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) | |
1105 | { | |
1106 | (void) dwarf2_directive_filename (); | |
1107 | } | |
1108 | ||
220e750f | 1109 | void |
a2e22468 | 1110 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 1111 | { |
ecea7679 RH |
1112 | offsetT filenum, line; |
1113 | ||
851feff8 DJ |
1114 | /* If we see two .loc directives in a row, force the first one to be |
1115 | output now. */ | |
7cadeb2c | 1116 | if (dwarf2_loc_directive_seen) |
6a50d470 | 1117 | dwarf2_emit_insn (0); |
851feff8 | 1118 | |
ecea7679 RH |
1119 | filenum = get_absolute_expression (); |
1120 | SKIP_WHITESPACE (); | |
1121 | line = get_absolute_expression (); | |
1122 | ||
1123 | if (filenum < 1) | |
1124 | { | |
5496f3c6 NC |
1125 | if (filenum != 0 || DWARF2_LINE_VERSION < 5) |
1126 | { | |
1127 | as_bad (_("file number less than one")); | |
1128 | return; | |
1129 | } | |
ecea7679 | 1130 | } |
5496f3c6 NC |
1131 | |
1132 | if (filenum >= (int) files_in_use || files[filenum].filename == NULL) | |
ecea7679 RH |
1133 | { |
1134 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
1135 | return; | |
1136 | } | |
1137 | ||
1138 | current.filenum = filenum; | |
1139 | current.line = line; | |
92846e72 | 1140 | current.discriminator = 0; |
ecea7679 RH |
1141 | |
1142 | #ifndef NO_LISTING | |
1143 | if (listing) | |
1144 | { | |
1145 | if (files[filenum].dir) | |
1146 | { | |
1147 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
1148 | size_t file_len = strlen (files[filenum].filename); | |
add39d23 | 1149 | char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1); |
ecea7679 RH |
1150 | |
1151 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 1152 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
1153 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
1154 | cp[dir_len + file_len + 1] = '\0'; | |
1155 | listing_source_file (cp); | |
e1fa0163 | 1156 | free (cp); |
ecea7679 RH |
1157 | } |
1158 | else | |
1159 | listing_source_file (files[filenum].filename); | |
1160 | listing_source_line (line); | |
1161 | } | |
1162 | #endif | |
1163 | ||
220e750f | 1164 | SKIP_WHITESPACE (); |
ecea7679 RH |
1165 | if (ISDIGIT (*input_line_pointer)) |
1166 | { | |
1167 | current.column = get_absolute_expression (); | |
1168 | SKIP_WHITESPACE (); | |
1169 | } | |
1170 | ||
1171 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 1172 | { |
bd0eb99b RH |
1173 | char *p, c; |
1174 | offsetT value; | |
1175 | ||
d02603dc | 1176 | c = get_symbol_name (& p); |
bd0eb99b RH |
1177 | |
1178 | if (strcmp (p, "basic_block") == 0) | |
1179 | { | |
1180 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1181 | *input_line_pointer = c; | |
1182 | } | |
1183 | else if (strcmp (p, "prologue_end") == 0) | |
1184 | { | |
1185 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
1186 | *input_line_pointer = c; | |
1187 | } | |
1188 | else if (strcmp (p, "epilogue_begin") == 0) | |
1189 | { | |
1190 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
1191 | *input_line_pointer = c; | |
1192 | } | |
1193 | else if (strcmp (p, "is_stmt") == 0) | |
1194 | { | |
d02603dc | 1195 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1196 | value = get_absolute_expression (); |
1197 | if (value == 0) | |
1198 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
1199 | else if (value == 1) | |
1200 | current.flags |= DWARF2_FLAG_IS_STMT; | |
1201 | else | |
ecea7679 RH |
1202 | { |
1203 | as_bad (_("is_stmt value not 0 or 1")); | |
1204 | return; | |
1205 | } | |
bd0eb99b RH |
1206 | } |
1207 | else if (strcmp (p, "isa") == 0) | |
1208 | { | |
d02603dc | 1209 | (void) restore_line_pointer (c); |
bd0eb99b | 1210 | value = get_absolute_expression (); |
ecea7679 | 1211 | if (value >= 0) |
bd0eb99b | 1212 | current.isa = value; |
ecea7679 RH |
1213 | else |
1214 | { | |
1215 | as_bad (_("isa number less than zero")); | |
1216 | return; | |
1217 | } | |
bd0eb99b | 1218 | } |
92846e72 CC |
1219 | else if (strcmp (p, "discriminator") == 0) |
1220 | { | |
d02603dc | 1221 | (void) restore_line_pointer (c); |
92846e72 CC |
1222 | value = get_absolute_expression (); |
1223 | if (value >= 0) | |
1224 | current.discriminator = value; | |
1225 | else | |
1226 | { | |
1227 | as_bad (_("discriminator less than zero")); | |
1228 | return; | |
1229 | } | |
1230 | } | |
ba8826a8 AO |
1231 | else if (strcmp (p, "view") == 0) |
1232 | { | |
1233 | symbolS *sym; | |
1234 | ||
1235 | (void) restore_line_pointer (c); | |
1236 | SKIP_WHITESPACE (); | |
1237 | ||
1238 | if (ISDIGIT (*input_line_pointer) | |
1239 | || *input_line_pointer == '-') | |
1240 | { | |
1241 | bfd_boolean force_reset = *input_line_pointer == '-'; | |
1242 | ||
1243 | value = get_absolute_expression (); | |
1244 | if (value != 0) | |
1245 | { | |
1246 | as_bad (_("numeric view can only be asserted to zero")); | |
1247 | return; | |
1248 | } | |
1249 | if (force_reset && force_reset_view) | |
1250 | sym = force_reset_view; | |
1251 | else | |
1252 | { | |
e01e1cee AM |
1253 | sym = symbol_temp_new (absolute_section, &zero_address_frag, |
1254 | value); | |
ba8826a8 AO |
1255 | if (force_reset) |
1256 | force_reset_view = sym; | |
1257 | } | |
1258 | } | |
1259 | else | |
1260 | { | |
1261 | char *name = read_symbol_name (); | |
1262 | ||
1263 | if (!name) | |
1264 | return; | |
1265 | sym = symbol_find_or_make (name); | |
38cf168b | 1266 | if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) |
ba8826a8 | 1267 | { |
38cf168b | 1268 | if (S_IS_VOLATILE (sym)) |
ba8826a8 | 1269 | sym = symbol_clone (sym, 1); |
38cf168b AM |
1270 | else if (!S_CAN_BE_REDEFINED (sym)) |
1271 | { | |
1272 | as_bad (_("symbol `%s' is already defined"), name); | |
1273 | return; | |
1274 | } | |
ba8826a8 | 1275 | } |
38cf168b AM |
1276 | S_SET_SEGMENT (sym, undefined_section); |
1277 | S_SET_VALUE (sym, 0); | |
1278 | symbol_set_frag (sym, &zero_address_frag); | |
ba8826a8 AO |
1279 | } |
1280 | current.view = sym; | |
1281 | } | |
bd0eb99b RH |
1282 | else |
1283 | { | |
ecea7679 | 1284 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
d02603dc | 1285 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1286 | return; |
1287 | } | |
1288 | ||
d02603dc | 1289 | SKIP_WHITESPACE_AFTER_NAME (); |
bd0eb99b RH |
1290 | } |
1291 | ||
1292 | demand_empty_rest_of_line (); | |
1eee4adc | 1293 | dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 1294 | debug_type = DEBUG_NONE; |
ba8826a8 AO |
1295 | |
1296 | /* If we were given a view id, emit the row right away. */ | |
1297 | if (current.view) | |
1298 | dwarf2_emit_insn (0); | |
220e750f | 1299 | } |
07a53e5c RH |
1300 | |
1301 | void | |
1302 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
1303 | { | |
1304 | offsetT value = get_absolute_expression (); | |
1305 | ||
1306 | if (value != 0 && value != 1) | |
1307 | { | |
1308 | as_bad (_("expected 0 or 1")); | |
1309 | ignore_rest_of_line (); | |
1310 | } | |
1311 | else | |
1312 | { | |
1313 | dwarf2_loc_mark_labels = value != 0; | |
1314 | demand_empty_rest_of_line (); | |
1315 | } | |
1316 | } | |
220e750f RH |
1317 | \f |
1318 | static struct frag * | |
a2e22468 | 1319 | first_frag_for_seg (segT seg) |
220e750f | 1320 | { |
c9049d30 | 1321 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
1322 | } |
1323 | ||
1324 | static struct frag * | |
a2e22468 | 1325 | last_frag_for_seg (segT seg) |
220e750f | 1326 | { |
c9049d30 | 1327 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 1328 | |
c9049d30 AM |
1329 | while (f->frch_next != NULL) |
1330 | f = f->frch_next; | |
220e750f | 1331 | |
c9049d30 | 1332 | return f->frch_last; |
220e750f RH |
1333 | } |
1334 | \f | |
1335 | /* Emit a single byte into the current segment. */ | |
1336 | ||
1337 | static inline void | |
a2e22468 | 1338 | out_byte (int byte) |
220e750f RH |
1339 | { |
1340 | FRAG_APPEND_1_CHAR (byte); | |
1341 | } | |
1342 | ||
1343 | /* Emit a statement program opcode into the current segment. */ | |
1344 | ||
1345 | static inline void | |
a2e22468 | 1346 | out_opcode (int opc) |
220e750f RH |
1347 | { |
1348 | out_byte (opc); | |
1349 | } | |
1350 | ||
1351 | /* Emit a two-byte word into the current segment. */ | |
1352 | ||
1353 | static inline void | |
a2e22468 | 1354 | out_two (int data) |
220e750f RH |
1355 | { |
1356 | md_number_to_chars (frag_more (2), data, 2); | |
1357 | } | |
1358 | ||
1359 | /* Emit a four byte word into the current segment. */ | |
1360 | ||
1361 | static inline void | |
a2e22468 | 1362 | out_four (int data) |
220e750f RH |
1363 | { |
1364 | md_number_to_chars (frag_more (4), data, 4); | |
1365 | } | |
1366 | ||
1367 | /* Emit an unsigned "little-endian base 128" number. */ | |
1368 | ||
fac0d250 | 1369 | static void |
a2e22468 | 1370 | out_uleb128 (addressT value) |
220e750f RH |
1371 | { |
1372 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
1373 | } | |
1374 | ||
92846e72 CC |
1375 | /* Emit a signed "little-endian base 128" number. */ |
1376 | ||
1377 | static void | |
1378 | out_leb128 (addressT value) | |
1379 | { | |
1380 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
1381 | } | |
1382 | ||
220e750f RH |
1383 | /* Emit a tuple for .debug_abbrev. */ |
1384 | ||
1385 | static inline void | |
a2e22468 | 1386 | out_abbrev (int name, int form) |
fac0d250 | 1387 | { |
220e750f RH |
1388 | out_uleb128 (name); |
1389 | out_uleb128 (form); | |
1390 | } | |
fac0d250 | 1391 | |
220e750f | 1392 | /* Get the size of a fragment. */ |
fac0d250 | 1393 | |
220e750f | 1394 | static offsetT |
c9049d30 | 1395 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
1396 | { |
1397 | frchainS *fr; | |
1398 | ||
1399 | if (frag->fr_next) | |
1400 | return frag->fr_fix; | |
1401 | ||
1402 | /* If a fragment is the last in the chain, special measures must be | |
1403 | taken to find its size before relaxation, since it may be pending | |
1404 | on some subsegment chain. */ | |
c9049d30 | 1405 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 1406 | if (fr->frch_last == frag) |
c5c0a210 | 1407 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
1408 | |
1409 | abort (); | |
1410 | } | |
fac0d250 | 1411 | |
220e750f | 1412 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 1413 | |
220e750f | 1414 | static void |
07a53e5c | 1415 | out_set_addr (symbolS *sym) |
220e750f | 1416 | { |
91d6fa6a | 1417 | expressionS exp; |
9e3af0e7 | 1418 | |
031e3350 | 1419 | memset (&exp, 0, sizeof exp); |
e2b9a97e CE |
1420 | out_opcode (DW_LNS_extended_op); |
1421 | out_uleb128 (sizeof_address + 1); | |
fac0d250 | 1422 | |
e2b9a97e | 1423 | out_opcode (DW_LNE_set_address); |
91d6fa6a NC |
1424 | exp.X_op = O_symbol; |
1425 | exp.X_add_symbol = sym; | |
1426 | exp.X_add_number = 0; | |
1427 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
1428 | } |
1429 | ||
a2e22468 | 1430 | static void scale_addr_delta (addressT *); |
c8970b4b | 1431 | |
a3b75434 | 1432 | static void |
d7342424 | 1433 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
1434 | { |
1435 | static int printed_this = 0; | |
8fbf7334 | 1436 | if (DWARF2_LINE_MIN_INSN_LENGTH > 1) |
a3b75434 | 1437 | { |
8fbf7334 | 1438 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this) |
8f02ae5b | 1439 | { |
8fbf7334 | 1440 | as_bad("unaligned opcodes detected in executable segment"); |
8f02ae5b AM |
1441 | printed_this = 1; |
1442 | } | |
8fbf7334 | 1443 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; |
a3b75434 | 1444 | } |
a3b75434 | 1445 | } |
a3b75434 | 1446 | |
220e750f RH |
1447 | /* Encode a pair of line and address skips as efficiently as possible. |
1448 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 1449 | |
220e750f RH |
1450 | The following two routines *must* be kept in sync. This is |
1451 | enforced by making emit_inc_line_addr abort if we do not emit | |
1452 | exactly the expected number of bytes. */ | |
1453 | ||
1454 | static int | |
a2e22468 | 1455 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 1456 | { |
220e750f RH |
1457 | unsigned int tmp, opcode; |
1458 | int len = 0; | |
fac0d250 | 1459 | |
220e750f | 1460 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 1461 | scale_addr_delta (&addr_delta); |
220e750f RH |
1462 | |
1463 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
1464 | We cannot use special opcodes here, since we want the end_sequence | |
1465 | to emit the matrix entry. */ | |
1466 | if (line_delta == INT_MAX) | |
fac0d250 | 1467 | { |
220e750f RH |
1468 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1469 | len = 1; | |
62e6b7b3 | 1470 | else if (addr_delta) |
220e750f RH |
1471 | len = 1 + sizeof_leb128 (addr_delta, 0); |
1472 | return len + 3; | |
fac0d250 | 1473 | } |
fac0d250 | 1474 | |
220e750f RH |
1475 | /* Bias the line delta by the base. */ |
1476 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 1477 | |
220e750f RH |
1478 | /* If the line increment is out of range of a special opcode, we |
1479 | must encode it with DW_LNS_advance_line. */ | |
1480 | if (tmp >= DWARF2_LINE_RANGE) | |
1481 | { | |
1482 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1483 | line_delta = 0; | |
1484 | tmp = 0 - DWARF2_LINE_BASE; | |
1485 | } | |
fac0d250 | 1486 | |
220e750f RH |
1487 | /* Bias the opcode by the special opcode base. */ |
1488 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 1489 | |
220e750f RH |
1490 | /* Avoid overflow when addr_delta is large. */ |
1491 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
1492 | { | |
1493 | /* Try using a special opcode. */ | |
1494 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1495 | if (opcode <= 255) | |
1496 | return len + 1; | |
1497 | ||
1498 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1499 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1500 | if (opcode <= 255) | |
1501 | return len + 2; | |
1502 | } | |
1503 | ||
1504 | /* Otherwise use DW_LNS_advance_pc. */ | |
1505 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
1506 | ||
1507 | /* DW_LNS_copy or special opcode. */ | |
1508 | len += 1; | |
1509 | ||
1510 | return len; | |
1511 | } | |
fac0d250 | 1512 | |
220e750f | 1513 | static void |
a2e22468 | 1514 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
1515 | { |
1516 | unsigned int tmp, opcode; | |
1517 | int need_copy = 0; | |
1518 | char *end = p + len; | |
fac0d250 | 1519 | |
07a53e5c RH |
1520 | /* Line number sequences cannot go backward in addresses. This means |
1521 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1522 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 1523 | |
220e750f | 1524 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
1525 | scale_addr_delta (&addr_delta); |
1526 | ||
220e750f RH |
1527 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
1528 | We cannot use special opcodes here, since we want the end_sequence | |
1529 | to emit the matrix entry. */ | |
1530 | if (line_delta == INT_MAX) | |
fac0d250 | 1531 | { |
220e750f RH |
1532 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1533 | *p++ = DW_LNS_const_add_pc; | |
62e6b7b3 | 1534 | else if (addr_delta) |
fac0d250 | 1535 | { |
220e750f RH |
1536 | *p++ = DW_LNS_advance_pc; |
1537 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 1538 | } |
220e750f RH |
1539 | |
1540 | *p++ = DW_LNS_extended_op; | |
1541 | *p++ = 1; | |
1542 | *p++ = DW_LNE_end_sequence; | |
1543 | goto done; | |
fac0d250 RH |
1544 | } |
1545 | ||
220e750f RH |
1546 | /* Bias the line delta by the base. */ |
1547 | tmp = line_delta - DWARF2_LINE_BASE; | |
1548 | ||
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) | |
fac0d250 | 1552 | { |
220e750f RH |
1553 | *p++ = DW_LNS_advance_line; |
1554 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 1555 | |
220e750f RH |
1556 | line_delta = 0; |
1557 | tmp = 0 - DWARF2_LINE_BASE; | |
1558 | need_copy = 1; | |
1559 | } | |
fac0d250 | 1560 | |
bd0eb99b RH |
1561 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
1562 | special opcode. */ | |
1563 | if (line_delta == 0 && addr_delta == 0) | |
1564 | { | |
1565 | *p++ = DW_LNS_copy; | |
1566 | goto done; | |
1567 | } | |
1568 | ||
220e750f RH |
1569 | /* Bias the opcode by the special opcode base. */ |
1570 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1571 | |
220e750f RH |
1572 | /* Avoid overflow when addr_delta is large. */ |
1573 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 1574 | { |
220e750f RH |
1575 | /* Try using a special opcode. */ |
1576 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1577 | if (opcode <= 255) | |
1578 | { | |
1579 | *p++ = opcode; | |
1580 | goto done; | |
1581 | } | |
1582 | ||
1583 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1584 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1585 | if (opcode <= 255) | |
fac0d250 | 1586 | { |
220e750f RH |
1587 | *p++ = DW_LNS_const_add_pc; |
1588 | *p++ = opcode; | |
1589 | goto done; | |
fac0d250 RH |
1590 | } |
1591 | } | |
220e750f RH |
1592 | |
1593 | /* Otherwise use DW_LNS_advance_pc. */ | |
1594 | *p++ = DW_LNS_advance_pc; | |
1595 | p += output_leb128 (p, addr_delta, 0); | |
1596 | ||
1597 | if (need_copy) | |
1598 | *p++ = DW_LNS_copy; | |
fac0d250 | 1599 | else |
220e750f | 1600 | *p++ = tmp; |
fac0d250 | 1601 | |
220e750f | 1602 | done: |
9c2799c2 | 1603 | gas_assert (p == end); |
220e750f | 1604 | } |
a8316fe2 | 1605 | |
220e750f | 1606 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1607 | |
220e750f | 1608 | static void |
a2e22468 | 1609 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1610 | { |
1611 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1612 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1613 | } | |
9de8d8f1 | 1614 | |
1737851b BW |
1615 | /* Write out an alternative form of line and address skips using |
1616 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1617 | line and address information, but it is required if linker relaxation |
1618 | could change the code offsets. The following two routines *must* be | |
1619 | kept in sync. */ | |
453dc3f0 | 1620 | #define ADDR_DELTA_LIMIT 50000 |
1737851b | 1621 | |
7ddd14de BW |
1622 | static int |
1623 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1624 | { |
7ddd14de | 1625 | int len = 0; |
1737851b BW |
1626 | |
1627 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1628 | if (line_delta != INT_MAX) |
1629 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1630 | ||
453dc3f0 | 1631 | if (addr_delta > ADDR_DELTA_LIMIT) |
7ddd14de BW |
1632 | { |
1633 | /* DW_LNS_extended_op */ | |
1634 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1635 | /* DW_LNE_set_address */ | |
1636 | len += 1 + sizeof_address; | |
1637 | } | |
1638 | else | |
1639 | /* DW_LNS_fixed_advance_pc */ | |
1640 | len += 3; | |
1641 | ||
1737851b | 1642 | if (line_delta == INT_MAX) |
7ddd14de BW |
1643 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1644 | len += 3; | |
1645 | else | |
1646 | /* DW_LNS_copy */ | |
1647 | len += 1; | |
1648 | ||
1649 | return len; | |
1650 | } | |
1651 | ||
1652 | static void | |
1653 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1654 | char *p, int len) | |
1655 | { | |
91d6fa6a | 1656 | expressionS *pexp; |
7ddd14de BW |
1657 | char *end = p + len; |
1658 | ||
1659 | /* Line number sequences cannot go backward in addresses. This means | |
1660 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1661 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de | 1662 | |
b40bf0a2 NC |
1663 | /* Verify that we have kept in sync with size_fixed_inc_line_addr. */ |
1664 | gas_assert (len == size_fixed_inc_line_addr (line_delta, addr_delta)); | |
1665 | ||
7ddd14de BW |
1666 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ |
1667 | if (line_delta != INT_MAX) | |
1668 | { | |
1669 | *p++ = DW_LNS_advance_line; | |
1670 | p += output_leb128 (p, line_delta, 1); | |
1671 | } | |
1672 | ||
91d6fa6a | 1673 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1674 | |
1675 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1676 | advance the address by at most 64K. Linker relaxation (without | |
1677 | which this function would not be used) could change the operand by | |
1678 | an unknown amount. If the address increment is getting close to | |
1679 | the limit, just reset the address. */ | |
453dc3f0 | 1680 | if (addr_delta > ADDR_DELTA_LIMIT) |
1737851b | 1681 | { |
7ddd14de | 1682 | symbolS *to_sym; |
91d6fa6a | 1683 | expressionS exp; |
7ddd14de | 1684 | |
031e3350 | 1685 | memset (&exp, 0, sizeof exp); |
9f6db0d3 | 1686 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1687 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1688 | |
1689 | *p++ = DW_LNS_extended_op; | |
1690 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1691 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1692 | exp.X_op = O_symbol; |
1693 | exp.X_add_symbol = to_sym; | |
1694 | exp.X_add_number = 0; | |
62ebcb5c | 1695 | emit_expr_fix (&exp, sizeof_address, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de BW |
1696 | p += sizeof_address; |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | *p++ = DW_LNS_fixed_advance_pc; | |
62ebcb5c | 1701 | emit_expr_fix (pexp, 2, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de | 1702 | p += 2; |
1737851b BW |
1703 | } |
1704 | ||
7ddd14de BW |
1705 | if (line_delta == INT_MAX) |
1706 | { | |
1707 | *p++ = DW_LNS_extended_op; | |
1708 | *p++ = 1; | |
1709 | *p++ = DW_LNE_end_sequence; | |
1710 | } | |
1711 | else | |
1712 | *p++ = DW_LNS_copy; | |
1737851b | 1713 | |
9c2799c2 | 1714 | gas_assert (p == end); |
1737851b BW |
1715 | } |
1716 | ||
220e750f RH |
1717 | /* Generate a variant frag that we can use to relax address/line |
1718 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1719 | |
220e750f | 1720 | static void |
07a53e5c | 1721 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1722 | { |
91d6fa6a | 1723 | expressionS exp; |
220e750f | 1724 | int max_chars; |
6576f0b5 | 1725 | |
031e3350 | 1726 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
1727 | exp.X_op = O_subtract; |
1728 | exp.X_add_symbol = to_sym; | |
1729 | exp.X_op_symbol = from_sym; | |
1730 | exp.X_add_number = 0; | |
fac0d250 | 1731 | |
220e750f RH |
1732 | /* The maximum size of the frag is the line delta with a maximum |
1733 | sized address delta. */ | |
7ddd14de BW |
1734 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1735 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1736 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1737 | else | |
1738 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1739 | |
220e750f | 1740 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1741 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1742 | } |
fac0d250 | 1743 | |
220e750f RH |
1744 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1745 | based on the current values of the symbols. It is called before | |
1746 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1747 | |
220e750f | 1748 | int |
a2e22468 | 1749 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1750 | { |
1751 | offsetT addr_delta; | |
1752 | int size; | |
fac0d250 | 1753 | |
6386f3a7 | 1754 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1755 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1756 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1757 | else | |
1758 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1759 | |
220e750f | 1760 | frag->fr_subtype = size; |
fac0d250 | 1761 | |
220e750f RH |
1762 | return size; |
1763 | } | |
1764 | ||
1765 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1766 | current values of the symbols. fr_subtype is the current length | |
1767 | of the frag. This returns the change in frag length. */ | |
1768 | ||
1769 | int | |
a2e22468 | 1770 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1771 | { |
1772 | int old_size, new_size; | |
fac0d250 | 1773 | |
220e750f RH |
1774 | old_size = frag->fr_subtype; |
1775 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1776 | |
220e750f | 1777 | return new_size - old_size; |
fac0d250 RH |
1778 | } |
1779 | ||
220e750f RH |
1780 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1781 | fill frag. This is called after all relaxation has been done. | |
1782 | fr_subtype will be the desired length of the frag. */ | |
1783 | ||
1784 | void | |
a2e22468 | 1785 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1786 | { |
220e750f RH |
1787 | offsetT addr_diff; |
1788 | ||
453dc3f0 NC |
1789 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1790 | { | |
2b0f3761 | 1791 | /* If linker relaxation is enabled then the distance between the two |
453dc3f0 NC |
1792 | symbols in the frag->fr_symbol expression might change. Hence we |
1793 | cannot rely upon the value computed by resolve_symbol_value. | |
1794 | Instead we leave the expression unfinalized and allow | |
1795 | emit_fixed_inc_line_addr to create a fixup (which later becomes a | |
1796 | relocation) that will allow the linker to correctly compute the | |
1797 | actual address difference. We have to use a fixed line advance for | |
1798 | this as we cannot (easily) relocate leb128 encoded values. */ | |
1799 | int saved_finalize_syms = finalize_syms; | |
1800 | ||
1801 | finalize_syms = 0; | |
1802 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
1803 | finalize_syms = saved_finalize_syms; | |
1804 | } | |
1805 | else | |
1806 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
fac0d250 | 1807 | |
220e750f RH |
1808 | /* fr_var carries the max_chars that we created the fragment with. |
1809 | fr_subtype carries the current expected length. We must, of | |
1810 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1811 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1812 | |
7ddd14de BW |
1813 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1814 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1815 | frag->fr_literal + frag->fr_fix, | |
1816 | frag->fr_subtype); | |
1817 | else | |
1818 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1819 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1820 | |
1821 | frag->fr_fix += frag->fr_subtype; | |
1822 | frag->fr_type = rs_fill; | |
1823 | frag->fr_var = 0; | |
1824 | frag->fr_offset = 0; | |
1825 | } | |
1826 | ||
1827 | /* Generate .debug_line content for the chain of line number entries | |
1828 | beginning at E, for segment SEG. */ | |
1829 | ||
1830 | static void | |
a2e22468 | 1831 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1832 | { |
1833 | unsigned filenum = 1; | |
1834 | unsigned line = 1; | |
1835 | unsigned column = 0; | |
bd0eb99b RH |
1836 | unsigned isa = 0; |
1837 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1838 | fragS *last_frag = NULL, *frag; |
1839 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1840 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1841 | struct line_entry *next; |
1842 | ||
b40bf0a2 NC |
1843 | if (flag_dwarf_sections) |
1844 | { | |
1845 | char * name; | |
1846 | const char * sec_name; | |
1847 | ||
2b0f3761 | 1848 | /* Switch to the relevant sub-section before we start to emit |
b40bf0a2 NC |
1849 | the line number table. |
1850 | ||
1851 | FIXME: These sub-sections do not have a normal Line Number | |
1852 | Program Header, thus strictly speaking they are not valid | |
1853 | DWARF sections. Unfortunately the DWARF standard assumes | |
1854 | a one-to-one relationship between compilation units and | |
1855 | line number tables. Thus we have to have a .debug_line | |
1856 | section, as well as our sub-sections, and we have to ensure | |
1857 | that all of the sub-sections are merged into a proper | |
1858 | .debug_line section before a debugger sees them. */ | |
3739860c | 1859 | |
fd361982 | 1860 | sec_name = bfd_section_name (seg); |
b40bf0a2 NC |
1861 | if (strcmp (sec_name, ".text") != 0) |
1862 | { | |
29a2809e | 1863 | name = concat (".debug_line", sec_name, (char *) NULL); |
b40bf0a2 NC |
1864 | subseg_set (subseg_get (name, FALSE), 0); |
1865 | } | |
1866 | else | |
1867 | /* Don't create a .debug_line.text section - | |
1868 | that is redundant. Instead just switch back to the | |
1869 | normal .debug_line section. */ | |
1870 | subseg_set (subseg_get (".debug_line", FALSE), 0); | |
1871 | } | |
1872 | ||
fead5cd9 | 1873 | do |
fac0d250 | 1874 | { |
07a53e5c | 1875 | int line_delta; |
220e750f RH |
1876 | |
1877 | if (filenum != e->loc.filenum) | |
fac0d250 | 1878 | { |
220e750f RH |
1879 | filenum = e->loc.filenum; |
1880 | out_opcode (DW_LNS_set_file); | |
1881 | out_uleb128 (filenum); | |
220e750f RH |
1882 | } |
1883 | ||
1884 | if (column != e->loc.column) | |
1885 | { | |
1886 | column = e->loc.column; | |
1887 | out_opcode (DW_LNS_set_column); | |
1888 | out_uleb128 (column); | |
220e750f RH |
1889 | } |
1890 | ||
92846e72 CC |
1891 | if (e->loc.discriminator != 0) |
1892 | { | |
1893 | out_opcode (DW_LNS_extended_op); | |
1894 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1895 | out_opcode (DW_LNE_set_discriminator); | |
1896 | out_uleb128 (e->loc.discriminator); | |
1897 | } | |
1898 | ||
bd0eb99b RH |
1899 | if (isa != e->loc.isa) |
1900 | { | |
1901 | isa = e->loc.isa; | |
1902 | out_opcode (DW_LNS_set_isa); | |
1903 | out_uleb128 (isa); | |
bd0eb99b RH |
1904 | } |
1905 | ||
1906 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1907 | { |
1908 | flags = e->loc.flags; | |
1909 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1910 | } |
1911 | ||
bd0eb99b | 1912 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1913 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1914 | |
bd0eb99b | 1915 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1916 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1917 | |
1918 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1919 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1920 | |
fb81275c JM |
1921 | /* Don't try to optimize away redundant entries; gdb wants two |
1922 | entries for a function where the code starts on the same line as | |
1923 | the {, and there's no way to identify that case here. Trust gcc | |
1924 | to optimize appropriately. */ | |
07a53e5c RH |
1925 | line_delta = e->loc.line - line; |
1926 | lab = e->label; | |
1927 | frag = symbol_get_frag (lab); | |
1928 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1929 | |
ba8826a8 AO |
1930 | if (last_frag == NULL |
1931 | || (e->loc.view == force_reset_view && force_reset_view | |
1932 | /* If we're going to reset the view, but we know we're | |
1933 | advancing the PC, we don't have to force with | |
1934 | set_address. We know we do when we're at the same | |
1935 | address of the same frag, and we know we might when | |
1936 | we're in the beginning of a frag, and we were at the | |
1937 | end of the previous frag. */ | |
1938 | && (frag == last_frag | |
1939 | ? (last_frag_ofs == frag_ofs) | |
1940 | : (frag_ofs == 0 | |
1941 | && ((offsetT)last_frag_ofs | |
1942 | >= get_frag_fix (last_frag, seg)))))) | |
220e750f | 1943 | { |
07a53e5c RH |
1944 | out_set_addr (lab); |
1945 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1946 | } |
7ddd14de | 1947 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1948 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1949 | else | |
1950 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1951 | ||
1952 | line = e->loc.line; | |
1953 | last_lab = lab; | |
1954 | last_frag = frag; | |
1955 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1956 | |
1957 | next = e->next; | |
1958 | free (e); | |
1959 | e = next; | |
fac0d250 | 1960 | } |
fead5cd9 | 1961 | while (e); |
353e2c69 | 1962 | |
220e750f | 1963 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1964 | frag = last_frag_for_seg (seg); |
c9049d30 | 1965 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1966 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1967 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1968 | else |
07a53e5c | 1969 | { |
e01e1cee | 1970 | lab = symbol_temp_new (seg, frag, frag_ofs); |
07a53e5c RH |
1971 | relax_inc_line_addr (INT_MAX, lab, last_lab); |
1972 | } | |
fac0d250 RH |
1973 | } |
1974 | ||
d2a54558 MW |
1975 | /* Switch to LINE_STR_SEG and output the given STR. Return the |
1976 | symbol pointing to the new string in the section. */ | |
1977 | ||
1978 | static symbolS * | |
1979 | add_line_strp (segT line_str_seg, const char *str) | |
1980 | { | |
1981 | char *cp; | |
1982 | size_t size; | |
1983 | symbolS *sym; | |
1984 | ||
1985 | subseg_set (line_str_seg, 0); | |
1986 | ||
1987 | sym = symbol_temp_new_now_octets (); | |
1988 | ||
1989 | size = strlen (str) + 1; | |
1990 | cp = frag_more (size); | |
1991 | memcpy (cp, str, size); | |
1992 | ||
1993 | return sym; | |
1994 | } | |
1995 | ||
1996 | ||
220e750f RH |
1997 | /* Emit the directory and file tables for .debug_line. */ |
1998 | ||
fac0d250 | 1999 | static void |
d2a54558 | 2000 | out_dir_and_file_list (segT line_seg, int sizeof_offset) |
fac0d250 RH |
2001 | { |
2002 | size_t size; | |
3d6b762c | 2003 | const char *dir; |
fac0d250 | 2004 | char *cp; |
220e750f | 2005 | unsigned int i; |
5496f3c6 NC |
2006 | bfd_boolean emit_md5 = FALSE; |
2007 | bfd_boolean emit_timestamps = TRUE; | |
2008 | bfd_boolean emit_filesize = TRUE; | |
d2a54558 MW |
2009 | segT line_str_seg = NULL; |
2010 | symbolS *line_strp; | |
220e750f | 2011 | |
5496f3c6 | 2012 | /* Output the Directory Table. */ |
5496f3c6 NC |
2013 | if (DWARF2_LINE_VERSION >= 5) |
2014 | { | |
546cb2d8 | 2015 | /* We only have one column in the directory table. */ |
5496f3c6 | 2016 | out_byte (1); |
546cb2d8 NC |
2017 | |
2018 | /* Describe the purpose and format of the column. */ | |
5496f3c6 | 2019 | out_uleb128 (DW_LNCT_path); |
d2a54558 MW |
2020 | /* Store these strings in the .debug_line_str section so they |
2021 | can be shared. */ | |
2022 | out_uleb128 (DW_FORM_line_strp); | |
546cb2d8 | 2023 | |
f63d03dd MW |
2024 | /* Now state how many rows there are in the table. We need at |
2025 | least 1 if there is one or more file names to store the | |
2026 | "working directory". */ | |
2027 | if (dirs_in_use == 0 && files_in_use > 0) | |
2028 | out_uleb128 (1); | |
2029 | else | |
2030 | out_uleb128 (dirs_in_use); | |
5496f3c6 NC |
2031 | } |
2032 | ||
a7ed1ca2 | 2033 | /* Emit directory list. */ |
f63d03dd | 2034 | if (DWARF2_LINE_VERSION >= 5 && (dirs_in_use > 0 || files_in_use > 0)) |
5496f3c6 | 2035 | { |
d2a54558 MW |
2036 | line_str_seg = subseg_new (".debug_line_str", 0); |
2037 | bfd_set_section_flags (line_str_seg, | |
2038 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2039 | | SEC_MERGE | SEC_STRINGS); | |
2040 | line_str_seg->entsize = 1; | |
2041 | ||
f63d03dd MW |
2042 | /* DWARF5 uses slot zero, but that is only set explicitly |
2043 | using a .file 0 directive. If that isn't used, but dir | |
2044 | one is used, then use that as main file directory. | |
2045 | Otherwise use pwd as main file directory. */ | |
2046 | if (dirs_in_use > 0 && dirs != NULL && dirs[0] != NULL) | |
5496f3c6 | 2047 | dir = remap_debug_filename (dirs[0]); |
f63d03dd MW |
2048 | else if (dirs_in_use > 1 && dirs != NULL && dirs[1] != NULL) |
2049 | dir = remap_debug_filename (dirs[1]); | |
2050 | else | |
2051 | dir = remap_debug_filename (getpwd ()); | |
2052 | ||
d2a54558 MW |
2053 | line_strp = add_line_strp (line_str_seg, dir); |
2054 | subseg_set (line_seg, 0); | |
2055 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
5496f3c6 | 2056 | } |
a7ed1ca2 NC |
2057 | for (i = 1; i < dirs_in_use; ++i) |
2058 | { | |
3d6b762c | 2059 | dir = remap_debug_filename (dirs[i]); |
d2a54558 MW |
2060 | if (DWARF2_LINE_VERSION < 5) |
2061 | { | |
2062 | size = strlen (dir) + 1; | |
2063 | cp = frag_more (size); | |
2064 | memcpy (cp, dir, size); | |
2065 | } | |
2066 | else | |
2067 | { | |
2068 | line_strp = add_line_strp (line_str_seg, dir); | |
2069 | subseg_set (line_seg, 0); | |
2070 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2071 | } | |
a7ed1ca2 | 2072 | } |
fac0d250 | 2073 | |
5496f3c6 NC |
2074 | if (DWARF2_LINE_VERSION < 5) |
2075 | /* Terminate it. */ | |
2076 | out_byte ('\0'); | |
2077 | ||
2078 | /* Output the File Name Table. */ | |
5496f3c6 NC |
2079 | if (DWARF2_LINE_VERSION >= 5) |
2080 | { | |
2081 | unsigned int columns = 4; | |
2082 | ||
2083 | if (((unsigned long) DWARF2_FILE_TIME_NAME ("", "")) == -1UL) | |
2084 | { | |
2085 | emit_timestamps = FALSE; | |
2086 | -- columns; | |
2087 | } | |
2088 | ||
2089 | if (DWARF2_FILE_SIZE_NAME ("", "") == -1) | |
2090 | { | |
2091 | emit_filesize = FALSE; | |
2092 | -- columns; | |
2093 | } | |
2094 | ||
2095 | for (i = 0; i < files_in_use; ++i) | |
2096 | if (files[i].md5[0] != 0) | |
2097 | break; | |
2098 | if (i < files_in_use) | |
2099 | { | |
2100 | emit_md5 = TRUE; | |
2101 | ++ columns; | |
2102 | } | |
2103 | ||
2104 | /* The number of format entries to follow. */ | |
2105 | out_byte (columns); | |
5496f3c6 NC |
2106 | /* The format of the file name. */ |
2107 | out_uleb128 (DW_LNCT_path); | |
d2a54558 MW |
2108 | /* Store these strings in the .debug_line_str section so they |
2109 | can be shared. */ | |
2110 | out_uleb128 (DW_FORM_line_strp); | |
5496f3c6 NC |
2111 | |
2112 | /* The format of the directory index. */ | |
2113 | out_uleb128 (DW_LNCT_directory_index); | |
2114 | out_uleb128 (DW_FORM_udata); | |
2115 | ||
2116 | if (emit_timestamps) | |
2117 | { | |
2118 | /* The format of the timestamp. */ | |
2119 | out_uleb128 (DW_LNCT_timestamp); | |
2120 | out_uleb128 (DW_FORM_udata); | |
2121 | } | |
2122 | ||
2123 | if (emit_filesize) | |
2124 | { | |
2125 | /* The format of the file size. */ | |
2126 | out_uleb128 (DW_LNCT_size); | |
2127 | out_uleb128 (DW_FORM_udata); | |
2128 | } | |
2129 | ||
2130 | if (emit_md5) | |
2131 | { | |
2132 | /* The format of the MD5 sum. */ | |
2133 | out_uleb128 (DW_LNCT_MD5); | |
2134 | out_uleb128 (DW_FORM_data16); | |
2135 | } | |
2136 | ||
2137 | /* The number of entries in the table. */ | |
2138 | out_uleb128 (files_in_use); | |
2139 | } | |
2140 | ||
2141 | for (i = DWARF2_LINE_VERSION > 4 ? 0 : 1; i < files_in_use; ++i) | |
fac0d250 | 2142 | { |
01e1a5bc NC |
2143 | const char *fullfilename; |
2144 | ||
249e3833 RH |
2145 | if (files[i].filename == NULL) |
2146 | { | |
f63d03dd MW |
2147 | /* Prevent a crash later, particularly for file 1. DWARF5 |
2148 | uses slot zero, but that is only set explicitly using a | |
2149 | .file 0 directive. If that isn't used, but file 1 is, | |
2150 | then use that as main file name. */ | |
2151 | if (DWARF2_LINE_VERSION >= 5 && i == 0 && files_in_use >= 1) | |
2152 | files[0].filename = files[1].filename; | |
2153 | else | |
2154 | files[i].filename = ""; | |
5496f3c6 NC |
2155 | if (DWARF2_LINE_VERSION < 5 || i != 0) |
2156 | { | |
2157 | as_bad (_("unassigned file number %ld"), (long) i); | |
2158 | continue; | |
2159 | } | |
249e3833 RH |
2160 | } |
2161 | ||
01e1a5bc NC |
2162 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
2163 | files[i].dir ? dirs [files [i].dir] : ""); | |
d2a54558 MW |
2164 | if (DWARF2_LINE_VERSION < 5) |
2165 | { | |
2166 | size = strlen (fullfilename) + 1; | |
2167 | cp = frag_more (size); | |
2168 | memcpy (cp, fullfilename, size); | |
2169 | } | |
2170 | else | |
2171 | { | |
2172 | line_strp = add_line_strp (line_str_seg, fullfilename); | |
2173 | subseg_set (line_seg, 0); | |
2174 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2175 | } | |
fac0d250 | 2176 | |
5496f3c6 NC |
2177 | /* Directory number. */ |
2178 | out_uleb128 (files[i].dir); | |
2179 | ||
01e1a5bc | 2180 | /* Output the last modification timestamp. */ |
5496f3c6 NC |
2181 | if (emit_timestamps) |
2182 | { | |
2183 | offsetT timestamp; | |
2184 | ||
2185 | timestamp = DWARF2_FILE_TIME_NAME (files[i].filename, | |
2186 | files[i].dir ? dirs [files [i].dir] : ""); | |
2187 | if (timestamp == -1) | |
2188 | timestamp = 0; | |
2189 | out_uleb128 (timestamp); | |
2190 | } | |
2191 | ||
01e1a5bc | 2192 | /* Output the filesize. */ |
5496f3c6 NC |
2193 | if (emit_filesize) |
2194 | { | |
2195 | offsetT filesize; | |
2196 | filesize = DWARF2_FILE_SIZE_NAME (files[i].filename, | |
2197 | files[i].dir ? dirs [files [i].dir] : ""); | |
2198 | if (filesize == -1) | |
2199 | filesize = 0; | |
2200 | out_uleb128 (filesize); | |
2201 | } | |
2202 | ||
2203 | /* Output the md5 sum. */ | |
2204 | if (emit_md5) | |
2205 | { | |
2206 | int b; | |
2207 | ||
2208 | for (b = 0; b < NUM_MD5_BYTES; b++) | |
2209 | out_byte (files[i].md5[b]); | |
2210 | } | |
fac0d250 | 2211 | } |
353e2c69 | 2212 | |
5496f3c6 NC |
2213 | if (DWARF2_LINE_VERSION < 5) |
2214 | /* Terminate filename list. */ | |
2215 | out_byte (0); | |
fac0d250 RH |
2216 | } |
2217 | ||
413a266c AM |
2218 | /* Switch to SEC and output a header length field. Return the size of |
2219 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
d025d5e5 MW |
2220 | to the end of the section. EXPR->X_add_number will be set to the |
2221 | negative size of the header. */ | |
413a266c AM |
2222 | |
2223 | static int | |
91d6fa6a | 2224 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
2225 | { |
2226 | symbolS *start_sym; | |
2227 | symbolS *end_sym; | |
2228 | ||
2229 | subseg_set (sec, 0); | |
b57dc16f | 2230 | |
0f8f0c57 NC |
2231 | if (flag_dwarf_sections) |
2232 | { | |
2233 | /* If we are going to put the start and end symbols in different | |
2234 | sections, then we need real symbols, not just fake, local ones. */ | |
2235 | frag_now_fix (); | |
2236 | start_sym = symbol_make (".Ldebug_line_start"); | |
2237 | end_sym = symbol_make (".Ldebug_line_end"); | |
2238 | symbol_set_value_now (start_sym); | |
2239 | } | |
2240 | else | |
0f8f0c57 | 2241 | { |
72354279 | 2242 | start_sym = symbol_temp_new_now_octets (); |
0f8f0c57 NC |
2243 | end_sym = symbol_temp_make (); |
2244 | } | |
413a266c AM |
2245 | |
2246 | /* Total length of the information. */ | |
91d6fa6a NC |
2247 | exp->X_op = O_subtract; |
2248 | exp->X_add_symbol = end_sym; | |
2249 | exp->X_op_symbol = start_sym; | |
413a266c AM |
2250 | |
2251 | switch (DWARF2_FORMAT (sec)) | |
2252 | { | |
2253 | case dwarf2_format_32bit: | |
91d6fa6a NC |
2254 | exp->X_add_number = -4; |
2255 | emit_expr (exp, 4); | |
413a266c AM |
2256 | return 4; |
2257 | ||
2258 | case dwarf2_format_64bit: | |
91d6fa6a | 2259 | exp->X_add_number = -12; |
413a266c | 2260 | out_four (-1); |
91d6fa6a | 2261 | emit_expr (exp, 8); |
413a266c AM |
2262 | return 8; |
2263 | ||
2264 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
2265 | exp->X_add_number = -8; |
2266 | emit_expr (exp, 8); | |
413a266c AM |
2267 | return 8; |
2268 | } | |
2269 | ||
2270 | as_fatal (_("internal error: unknown dwarf2 format")); | |
2271 | return 0; | |
2272 | } | |
2273 | ||
220e750f RH |
2274 | /* Emit the collected .debug_line data. */ |
2275 | ||
2276 | static void | |
a2e22468 | 2277 | out_debug_line (segT line_seg) |
220e750f | 2278 | { |
91d6fa6a | 2279 | expressionS exp; |
02fe846e | 2280 | symbolS *prologue_start, *prologue_end; |
220e750f RH |
2281 | symbolS *line_end; |
2282 | struct line_seg *s; | |
14e777e0 | 2283 | int sizeof_offset; |
220e750f | 2284 | |
031e3350 | 2285 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2286 | sizeof_offset = out_header (line_seg, &exp); |
2287 | line_end = exp.X_add_symbol; | |
220e750f RH |
2288 | |
2289 | /* Version. */ | |
88ebb0a1 | 2290 | out_two (DWARF2_LINE_VERSION); |
220e750f | 2291 | |
5496f3c6 NC |
2292 | if (DWARF2_LINE_VERSION >= 5) |
2293 | { | |
2294 | out_byte (sizeof_address); | |
2295 | out_byte (0); /* Segment Selector size. */ | |
2296 | } | |
220e750f | 2297 | /* Length of the prologue following this length. */ |
02fe846e | 2298 | prologue_start = symbol_temp_make (); |
413a266c | 2299 | prologue_end = symbol_temp_make (); |
02fe846e | 2300 | exp.X_op = O_subtract; |
91d6fa6a | 2301 | exp.X_add_symbol = prologue_end; |
02fe846e AM |
2302 | exp.X_op_symbol = prologue_start; |
2303 | exp.X_add_number = 0; | |
91d6fa6a | 2304 | emit_expr (&exp, sizeof_offset); |
e2b9a97e | 2305 | symbol_set_value_now (prologue_start); |
220e750f RH |
2306 | |
2307 | /* Parameters of the state machine. */ | |
2308 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
5496f3c6 NC |
2309 | if (DWARF2_LINE_VERSION >= 4) |
2310 | out_byte (DWARF2_LINE_MAX_OPS_PER_INSN); | |
220e750f RH |
2311 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); |
2312 | out_byte (DWARF2_LINE_BASE); | |
2313 | out_byte (DWARF2_LINE_RANGE); | |
2314 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
2315 | ||
2316 | /* Standard opcode lengths. */ | |
2317 | out_byte (0); /* DW_LNS_copy */ | |
2318 | out_byte (1); /* DW_LNS_advance_pc */ | |
2319 | out_byte (1); /* DW_LNS_advance_line */ | |
2320 | out_byte (1); /* DW_LNS_set_file */ | |
2321 | out_byte (1); /* DW_LNS_set_column */ | |
2322 | out_byte (0); /* DW_LNS_negate_stmt */ | |
2323 | out_byte (0); /* DW_LNS_set_basic_block */ | |
2324 | out_byte (0); /* DW_LNS_const_add_pc */ | |
2325 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
2326 | out_byte (0); /* DW_LNS_set_prologue_end */ |
2327 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
2328 | out_byte (1); /* DW_LNS_set_isa */ | |
5496f3c6 NC |
2329 | /* We have emitted 12 opcode lengths, so make that this |
2330 | matches up to the opcode base value we have been using. */ | |
2331 | gas_assert (DWARF2_LINE_OPCODE_BASE == 13); | |
220e750f | 2332 | |
d2a54558 | 2333 | out_dir_and_file_list (line_seg, sizeof_offset); |
220e750f | 2334 | |
e2b9a97e | 2335 | symbol_set_value_now (prologue_end); |
220e750f RH |
2336 | |
2337 | /* For each section, emit a statement program. */ | |
ee515fb7 | 2338 | for (s = all_segs; s; s = s->next) |
9aec2026 NC |
2339 | if (SEG_NORMAL (s->seg)) |
2340 | process_entries (s->seg, s->head->head); | |
2341 | else | |
2342 | as_warn ("dwarf line number information for %s ignored", | |
2343 | segment_name (s->seg)); | |
220e750f | 2344 | |
b40bf0a2 NC |
2345 | if (flag_dwarf_sections) |
2346 | /* We have to switch to the special .debug_line_end section | |
2347 | before emitting the end-of-debug_line symbol. The linker | |
2348 | script arranges for this section to be placed after all the | |
2349 | (potentially garbage collected) .debug_line.<foo> sections. | |
2350 | This section contains the line_end symbol which is used to | |
2351 | compute the size of the linked .debug_line section, as seen | |
2352 | in the DWARF Line Number header. */ | |
2353 | subseg_set (subseg_get (".debug_line_end", FALSE), 0); | |
2354 | ||
e2b9a97e | 2355 | symbol_set_value_now (line_end); |
220e750f RH |
2356 | } |
2357 | ||
802f5d9e | 2358 | static void |
bdd3b953 | 2359 | out_debug_ranges (segT ranges_seg, symbolS **ranges_sym) |
802f5d9e NC |
2360 | { |
2361 | unsigned int addr_size = sizeof_address; | |
2362 | struct line_seg *s; | |
91d6fa6a | 2363 | expressionS exp; |
802f5d9e NC |
2364 | unsigned int i; |
2365 | ||
031e3350 | 2366 | memset (&exp, 0, sizeof exp); |
802f5d9e NC |
2367 | subseg_set (ranges_seg, 0); |
2368 | ||
bdd3b953 MW |
2369 | /* For DW_AT_ranges to point at (there is no header, so really start |
2370 | of section, but see out_debug_rnglists). */ | |
2371 | *ranges_sym = symbol_temp_new_now_octets (); | |
2372 | ||
802f5d9e | 2373 | /* Base Address Entry. */ |
7fd3924a | 2374 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2375 | out_byte (0xff); |
7fd3924a | 2376 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2377 | out_byte (0); |
2378 | ||
2379 | /* Range List Entry. */ | |
2380 | for (s = all_segs; s; s = s->next) | |
2381 | { | |
2382 | fragS *frag; | |
2383 | symbolS *beg, *end; | |
2384 | ||
2385 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2386 | beg = symbol_temp_new (s->seg, frag, 0); |
802f5d9e NC |
2387 | s->text_start = beg; |
2388 | ||
2389 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2390 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
802f5d9e NC |
2391 | s->text_end = end; |
2392 | ||
91d6fa6a NC |
2393 | exp.X_op = O_symbol; |
2394 | exp.X_add_symbol = beg; | |
2395 | exp.X_add_number = 0; | |
2396 | emit_expr (&exp, addr_size); | |
802f5d9e | 2397 | |
91d6fa6a NC |
2398 | exp.X_op = O_symbol; |
2399 | exp.X_add_symbol = end; | |
2400 | exp.X_add_number = 0; | |
2401 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
2402 | } |
2403 | ||
2404 | /* End of Range Entry. */ | |
7fd3924a | 2405 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2406 | out_byte (0); |
7fd3924a | 2407 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2408 | out_byte (0); |
2409 | } | |
2410 | ||
bdd3b953 MW |
2411 | static void |
2412 | out_debug_rnglists (segT ranges_seg, symbolS **ranges_sym) | |
2413 | { | |
2414 | expressionS exp; | |
2415 | symbolS *ranges_end; | |
2416 | struct line_seg *s; | |
2417 | ||
2418 | /* Unit length. */ | |
2419 | memset (&exp, 0, sizeof exp); | |
2420 | out_header (ranges_seg, &exp); | |
2421 | ranges_end = exp.X_add_symbol; | |
2422 | ||
2423 | out_two (DWARF2_RNGLISTS_VERSION); | |
2424 | out_byte (sizeof_address); | |
2425 | out_byte (0); /* Segment Selector size. */ | |
2426 | out_four (0); /* Offset entry count. */ | |
2427 | ||
2428 | /* For DW_AT_ranges to point at (must be after the header). */ | |
2429 | *ranges_sym = symbol_temp_new_now_octets (); | |
2430 | ||
2431 | for (s = all_segs; s; s = s->next) | |
2432 | { | |
2433 | fragS *frag; | |
2434 | symbolS *beg, *end; | |
2435 | ||
2436 | out_byte (DW_RLE_start_length); | |
2437 | ||
2438 | frag = first_frag_for_seg (s->seg); | |
2439 | beg = symbol_temp_new (s->seg, frag, 0); | |
2440 | s->text_start = beg; | |
2441 | ||
2442 | frag = last_frag_for_seg (s->seg); | |
2443 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); | |
2444 | s->text_end = end; | |
2445 | ||
2446 | exp.X_op = O_symbol; | |
2447 | exp.X_add_symbol = beg; | |
2448 | exp.X_add_number = 0; | |
2449 | emit_expr (&exp, sizeof_address); | |
2450 | ||
2451 | exp.X_op = O_symbol; | |
2452 | exp.X_add_symbol = end; | |
2453 | exp.X_add_number = 0; | |
2454 | emit_leb128_expr (&exp, 0); | |
2455 | } | |
2456 | ||
2457 | out_byte (DW_RLE_end_of_list); | |
2458 | ||
2459 | symbol_set_value_now (ranges_end); | |
2460 | } | |
2461 | ||
220e750f RH |
2462 | /* Emit data for .debug_aranges. */ |
2463 | ||
58b5739a | 2464 | static void |
a2e22468 | 2465 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 2466 | { |
220e750f | 2467 | unsigned int addr_size = sizeof_address; |
d025d5e5 | 2468 | offsetT size; |
220e750f | 2469 | struct line_seg *s; |
91d6fa6a | 2470 | expressionS exp; |
413a266c | 2471 | symbolS *aranges_end; |
220e750f | 2472 | char *p; |
413a266c | 2473 | int sizeof_offset; |
fac0d250 | 2474 | |
031e3350 | 2475 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2476 | sizeof_offset = out_header (aranges_seg, &exp); |
2477 | aranges_end = exp.X_add_symbol; | |
d025d5e5 | 2478 | size = -exp.X_add_number; |
fac0d250 | 2479 | |
220e750f | 2480 | /* Version. */ |
88ebb0a1 | 2481 | out_two (DWARF2_ARANGES_VERSION); |
d025d5e5 | 2482 | size += 2; |
4dc7ead9 | 2483 | |
220e750f | 2484 | /* Offset to .debug_info. */ |
413a266c | 2485 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
d025d5e5 | 2486 | size += sizeof_offset; |
220e750f RH |
2487 | |
2488 | /* Size of an address (offset portion). */ | |
2489 | out_byte (addr_size); | |
d025d5e5 | 2490 | size++; |
220e750f RH |
2491 | |
2492 | /* Size of a segment descriptor. */ | |
2493 | out_byte (0); | |
d025d5e5 | 2494 | size++; |
220e750f RH |
2495 | |
2496 | /* Align the header. */ | |
d025d5e5 MW |
2497 | while ((size++ % (2 * addr_size)) > 0) |
2498 | out_byte (0); | |
4dc7ead9 | 2499 | |
ee515fb7 | 2500 | for (s = all_segs; s; s = s->next) |
220e750f RH |
2501 | { |
2502 | fragS *frag; | |
2503 | symbolS *beg, *end; | |
2504 | ||
2505 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2506 | beg = symbol_temp_new (s->seg, frag, 0); |
220e750f RH |
2507 | s->text_start = beg; |
2508 | ||
2509 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2510 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
220e750f RH |
2511 | s->text_end = end; |
2512 | ||
91d6fa6a NC |
2513 | exp.X_op = O_symbol; |
2514 | exp.X_add_symbol = beg; | |
2515 | exp.X_add_number = 0; | |
2516 | emit_expr (&exp, addr_size); | |
220e750f | 2517 | |
91d6fa6a NC |
2518 | exp.X_op = O_subtract; |
2519 | exp.X_add_symbol = end; | |
2520 | exp.X_op_symbol = beg; | |
2521 | exp.X_add_number = 0; | |
2522 | emit_expr (&exp, addr_size); | |
220e750f | 2523 | } |
4dc7ead9 | 2524 | |
220e750f RH |
2525 | p = frag_more (2 * addr_size); |
2526 | md_number_to_chars (p, 0, addr_size); | |
2527 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c | 2528 | |
e2b9a97e | 2529 | symbol_set_value_now (aranges_end); |
4dc7ead9 RH |
2530 | } |
2531 | ||
220e750f RH |
2532 | /* Emit data for .debug_abbrev. Note that this must be kept in |
2533 | sync with out_debug_info below. */ | |
fac0d250 | 2534 | |
220e750f | 2535 | static void |
413a266c AM |
2536 | out_debug_abbrev (segT abbrev_seg, |
2537 | segT info_seg ATTRIBUTE_UNUSED, | |
2538 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f | 2539 | { |
dd216e07 | 2540 | int secoff_form; |
220e750f | 2541 | subseg_set (abbrev_seg, 0); |
fac0d250 | 2542 | |
220e750f RH |
2543 | out_uleb128 (1); |
2544 | out_uleb128 (DW_TAG_compile_unit); | |
2545 | out_byte (DW_CHILDREN_no); | |
dd216e07 MW |
2546 | if (DWARF2_VERSION < 4) |
2547 | { | |
2548 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) | |
2549 | secoff_form = DW_FORM_data4; | |
2550 | else | |
2551 | secoff_form = DW_FORM_data8; | |
2552 | } | |
413a266c | 2553 | else |
dd216e07 MW |
2554 | secoff_form = DW_FORM_sec_offset; |
2555 | out_abbrev (DW_AT_stmt_list, secoff_form); | |
220e750f | 2556 | if (all_segs->next == NULL) |
4dc7ead9 | 2557 | { |
220e750f | 2558 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
88ebb0a1 MW |
2559 | if (DWARF2_VERSION < 4) |
2560 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
2561 | else | |
6b9a135d | 2562 | out_abbrev (DW_AT_high_pc, DW_FORM_udata); |
220e750f | 2563 | } |
802f5d9e | 2564 | else |
dd216e07 | 2565 | out_abbrev (DW_AT_ranges, secoff_form); |
49fced12 MW |
2566 | out_abbrev (DW_AT_name, DW_FORM_strp); |
2567 | out_abbrev (DW_AT_comp_dir, DW_FORM_strp); | |
2568 | out_abbrev (DW_AT_producer, DW_FORM_strp); | |
220e750f RH |
2569 | out_abbrev (DW_AT_language, DW_FORM_data2); |
2570 | out_abbrev (0, 0); | |
a987bfc9 RH |
2571 | |
2572 | /* Terminate the abbreviations for this compilation unit. */ | |
2573 | out_byte (0); | |
220e750f | 2574 | } |
4dc7ead9 | 2575 | |
220e750f | 2576 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 2577 | |
220e750f | 2578 | static void |
bdd3b953 MW |
2579 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, |
2580 | symbolS *ranges_sym, symbolS *name_sym, | |
2581 | symbolS *comp_dir_sym, symbolS *producer_sym) | |
220e750f | 2582 | { |
91d6fa6a | 2583 | expressionS exp; |
220e750f | 2584 | symbolS *info_end; |
14e777e0 | 2585 | int sizeof_offset; |
4dc7ead9 | 2586 | |
031e3350 | 2587 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2588 | sizeof_offset = out_header (info_seg, &exp); |
2589 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 2590 | |
220e750f | 2591 | /* DWARF version. */ |
fc0eebac | 2592 | out_two (DWARF2_VERSION); |
4dc7ead9 | 2593 | |
a3b3e858 MW |
2594 | if (DWARF2_VERSION < 5) |
2595 | { | |
2596 | /* .debug_abbrev offset */ | |
2597 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2598 | } | |
2599 | else | |
2600 | { | |
2601 | /* unit (header) type */ | |
2602 | out_byte (DW_UT_compile); | |
2603 | } | |
4dc7ead9 | 2604 | |
220e750f RH |
2605 | /* Target address size. */ |
2606 | out_byte (sizeof_address); | |
fac0d250 | 2607 | |
a3b3e858 MW |
2608 | if (DWARF2_VERSION >= 5) |
2609 | { | |
2610 | /* .debug_abbrev offset */ | |
2611 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2612 | } | |
2613 | ||
220e750f RH |
2614 | /* DW_TAG_compile_unit DIE abbrev */ |
2615 | out_uleb128 (1); | |
fac0d250 | 2616 | |
220e750f | 2617 | /* DW_AT_stmt_list */ |
413a266c AM |
2618 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
2619 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
2620 | ? 4 : 8)); | |
fac0d250 | 2621 | |
802f5d9e | 2622 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 2623 | if (all_segs->next == NULL) |
58b5739a | 2624 | { |
220e750f | 2625 | /* DW_AT_low_pc */ |
91d6fa6a NC |
2626 | exp.X_op = O_symbol; |
2627 | exp.X_add_symbol = all_segs->text_start; | |
2628 | exp.X_add_number = 0; | |
2629 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
2630 | |
2631 | /* DW_AT_high_pc */ | |
88ebb0a1 MW |
2632 | if (DWARF2_VERSION < 4) |
2633 | exp.X_op = O_symbol; | |
2634 | else | |
2635 | { | |
2636 | exp.X_op = O_subtract; | |
2637 | exp.X_op_symbol = all_segs->text_start; | |
2638 | } | |
91d6fa6a NC |
2639 | exp.X_add_symbol = all_segs->text_end; |
2640 | exp.X_add_number = 0; | |
6b9a135d MW |
2641 | if (DWARF2_VERSION < 4) |
2642 | emit_expr (&exp, sizeof_address); | |
2643 | else | |
2644 | emit_leb128_expr (&exp, 0); | |
58b5739a | 2645 | } |
802f5d9e NC |
2646 | else |
2647 | { | |
eb1fe072 NC |
2648 | /* This attribute is emitted if the code is disjoint. */ |
2649 | /* DW_AT_ranges. */ | |
bdd3b953 | 2650 | TC_DWARF2_EMIT_OFFSET (ranges_sym, sizeof_offset); |
802f5d9e | 2651 | } |
58b5739a | 2652 | |
49fced12 MW |
2653 | /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str |
2654 | setup in out_debug_str below. */ | |
2655 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2656 | TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset); | |
2657 | TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset); | |
2658 | ||
2659 | /* DW_AT_language. Yes, this is probably not really MIPS, but the | |
2660 | dwarf2 draft has no standard code for assembler. */ | |
2661 | out_two (DW_LANG_Mips_Assembler); | |
2662 | ||
e2b9a97e | 2663 | symbol_set_value_now (info_end); |
49fced12 MW |
2664 | } |
2665 | ||
2666 | /* Emit the three debug strings needed in .debug_str and setup symbols | |
2667 | to them for use in out_debug_info. */ | |
2668 | static void | |
2669 | out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym, | |
2670 | symbolS **producer_sym) | |
2671 | { | |
2672 | char producer[128]; | |
2673 | const char *comp_dir; | |
2674 | const char *dirname; | |
2675 | char *p; | |
2676 | int len; | |
5496f3c6 | 2677 | int first_file = DWARF2_LINE_VERSION > 4 ? 0 : 1; |
49fced12 MW |
2678 | |
2679 | subseg_set (str_seg, 0); | |
2680 | ||
48b91938 | 2681 | /* DW_AT_name. We don't have the actual file name that was present |
5496f3c6 | 2682 | on the command line, so assume files[first_file] is the main input file. |
48b91938 RH |
2683 | We're not supposed to get called unless at least one line number |
2684 | entry was emitted, so this should always be defined. */ | |
5c4e5fe6 | 2685 | *name_sym = symbol_temp_new_now_octets (); |
7fd3924a | 2686 | if (files_in_use == 0) |
48b91938 | 2687 | abort (); |
5496f3c6 | 2688 | if (files[first_file].dir) |
a7ed1ca2 | 2689 | { |
5496f3c6 | 2690 | dirname = remap_debug_filename (dirs[files[first_file].dir]); |
3d6b762c | 2691 | len = strlen (dirname); |
198f1251 TG |
2692 | #ifdef TE_VMS |
2693 | /* Already has trailing slash. */ | |
2694 | p = frag_more (len); | |
2695 | memcpy (p, dirname, len); | |
2696 | #else | |
a7ed1ca2 | 2697 | p = frag_more (len + 1); |
3d6b762c | 2698 | memcpy (p, dirname, len); |
56487c55 | 2699 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 2700 | #endif |
a7ed1ca2 | 2701 | } |
5496f3c6 | 2702 | len = strlen (files[first_file].filename) + 1; |
48b91938 | 2703 | p = frag_more (len); |
5496f3c6 | 2704 | memcpy (p, files[first_file].filename, len); |
48b91938 | 2705 | |
220e750f | 2706 | /* DW_AT_comp_dir */ |
5c4e5fe6 | 2707 | *comp_dir_sym = symbol_temp_new_now_octets (); |
3d6b762c | 2708 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
2709 | len = strlen (comp_dir) + 1; |
2710 | p = frag_more (len); | |
2711 | memcpy (p, comp_dir, len); | |
fac0d250 | 2712 | |
220e750f | 2713 | /* DW_AT_producer */ |
5c4e5fe6 | 2714 | *producer_sym = symbol_temp_new_now_octets (); |
220e750f RH |
2715 | sprintf (producer, "GNU AS %s", VERSION); |
2716 | len = strlen (producer) + 1; | |
2717 | p = frag_more (len); | |
2718 | memcpy (p, producer, len); | |
fac0d250 RH |
2719 | } |
2720 | ||
1e9cc1c2 NC |
2721 | void |
2722 | dwarf2_init (void) | |
2723 | { | |
1e9cc1c2 | 2724 | last_seg_ptr = &all_segs; |
0ac2b354 AB |
2725 | |
2726 | /* Select the default CIE version to produce here. The global | |
2727 | starts with a value of -1 and will be modified to a valid value | |
2728 | either by the user providing a command line option, or some | |
2729 | targets will select their own default in md_after_parse_args. If | |
2730 | we get here and the global still contains -1 then it is up to us | |
2731 | to pick a sane default. The default we choose is 1, this is the | |
2732 | CIE version gas has produced for a long time, and there seems no | |
2733 | reason to change it yet. */ | |
2734 | if (flag_dwarf_cie_version == -1) | |
2735 | flag_dwarf_cie_version = 1; | |
1e9cc1c2 NC |
2736 | } |
2737 | ||
2738 | ||
c6cb92c5 NS |
2739 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
2740 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
df1c40a7 L |
2741 | file has a non-empty .debug_info section and an empty .debug_line |
2742 | section. If we emit .debug_line, and the .debug_info section is | |
2743 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
2744 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
2745 | or --gdwarf2 was given and there were any located instructions | |
2746 | emitted. */ | |
c6cb92c5 | 2747 | |
fac0d250 | 2748 | void |
a2e22468 | 2749 | dwarf2_finish (void) |
fac0d250 | 2750 | { |
220e750f RH |
2751 | segT line_seg; |
2752 | struct line_seg *s; | |
c6cb92c5 NS |
2753 | segT info_seg; |
2754 | int emit_other_sections = 0; | |
df1c40a7 | 2755 | int empty_debug_line = 0; |
c6cb92c5 NS |
2756 | |
2757 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
2758 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 2759 | |
df1c40a7 L |
2760 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
2761 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
2762 | ||
2763 | /* We can't construct a new debug_line section if we already have one. | |
2764 | Give an error. */ | |
2765 | if (all_segs && !empty_debug_line) | |
2766 | as_fatal ("duplicate .debug_line sections"); | |
2767 | ||
2768 | if ((!all_segs && emit_other_sections) | |
2769 | || (!emit_other_sections && !empty_debug_line)) | |
2770 | /* If there is no line information and no non-empty .debug_info | |
2771 | section, or if there is both a non-empty .debug_info and a non-empty | |
2772 | .debug_line, then we do nothing. */ | |
220e750f | 2773 | return; |
fac0d250 | 2774 | |
220e750f | 2775 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 2776 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 2777 | |
220e750f RH |
2778 | /* Create and switch to the line number section. */ |
2779 | line_seg = subseg_new (".debug_line", 0); | |
61826503 | 2780 | bfd_set_section_flags (line_seg, SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); |
fac0d250 | 2781 | |
220e750f | 2782 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 2783 | for (s = all_segs; s; s = s->next) |
fac0d250 | 2784 | { |
91d6fa6a NC |
2785 | struct line_subseg *lss = s->head; |
2786 | struct line_entry **ptail = lss->ptail; | |
220e750f | 2787 | |
62e6b7b3 AO |
2788 | /* Reset the initial view of the first subsection of the |
2789 | section. */ | |
2790 | if (lss->head && lss->head->loc.view) | |
2791 | set_or_check_view (lss->head, NULL, NULL); | |
2792 | ||
91d6fa6a | 2793 | while ((lss = lss->next) != NULL) |
220e750f | 2794 | { |
62e6b7b3 AO |
2795 | /* Link the first view of subsequent subsections to the |
2796 | previous view. */ | |
2797 | if (lss->head && lss->head->loc.view) | |
2798 | set_or_check_view (lss->head, | |
2799 | !s->head ? NULL : (struct line_entry *)ptail, | |
2800 | s->head ? s->head->head : NULL); | |
91d6fa6a NC |
2801 | *ptail = lss->head; |
2802 | ptail = lss->ptail; | |
220e750f | 2803 | } |
fac0d250 | 2804 | } |
85a39694 | 2805 | |
220e750f | 2806 | out_debug_line (line_seg); |
85a39694 | 2807 | |
c6cb92c5 | 2808 | /* If this is assembler generated line info, and there is no |
49fced12 MW |
2809 | debug_info already, we need .debug_info, .debug_abbrev and |
2810 | .debug_str sections as well. */ | |
c6cb92c5 | 2811 | if (emit_other_sections) |
220e750f RH |
2812 | { |
2813 | segT abbrev_seg; | |
220e750f | 2814 | segT aranges_seg; |
49fced12 | 2815 | segT str_seg; |
bdd3b953 | 2816 | symbolS *name_sym, *comp_dir_sym, *producer_sym, *ranges_sym; |
4dc7ead9 | 2817 | |
9c2799c2 | 2818 | gas_assert (all_segs); |
7fd3924a | 2819 | |
220e750f RH |
2820 | info_seg = subseg_new (".debug_info", 0); |
2821 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
2822 | aranges_seg = subseg_new (".debug_aranges", 0); | |
49fced12 | 2823 | str_seg = subseg_new (".debug_str", 0); |
ef99799a | 2824 | |
61826503 CE |
2825 | bfd_set_section_flags (info_seg, |
2826 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2827 | bfd_set_section_flags (abbrev_seg, | |
2828 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2829 | bfd_set_section_flags (aranges_seg, | |
2830 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2831 | bfd_set_section_flags (str_seg, | |
2832 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2833 | | SEC_MERGE | SEC_STRINGS); | |
49fced12 | 2834 | str_seg->entsize = 1; |
ef99799a | 2835 | |
ee515fb7 | 2836 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 2837 | |
802f5d9e | 2838 | if (all_segs->next == NULL) |
bdd3b953 | 2839 | ranges_sym = NULL; |
802f5d9e NC |
2840 | else |
2841 | { | |
bdd3b953 MW |
2842 | if (DWARF2_VERSION < 5) |
2843 | { | |
2844 | segT ranges_seg = subseg_new (".debug_ranges", 0); | |
2845 | bfd_set_section_flags (ranges_seg, (SEC_READONLY | |
2846 | | SEC_DEBUGGING | |
2847 | | SEC_OCTETS)); | |
2848 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
2849 | out_debug_ranges (ranges_seg, &ranges_sym); | |
2850 | } | |
2851 | else | |
2852 | { | |
2853 | segT rnglists_seg = subseg_new (".debug_rnglists", 0); | |
2854 | bfd_set_section_flags (rnglists_seg, (SEC_READONLY | |
2855 | | SEC_DEBUGGING | |
2856 | | SEC_OCTETS)); | |
2857 | out_debug_rnglists (rnglists_seg, &ranges_sym); | |
2858 | } | |
802f5d9e NC |
2859 | } |
2860 | ||
220e750f | 2861 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 2862 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
49fced12 | 2863 | out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym); |
bdd3b953 | 2864 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_sym, |
49fced12 | 2865 | name_sym, comp_dir_sym, producer_sym); |
220e750f | 2866 | } |
85a39694 | 2867 | } |
ba8826a8 AO |
2868 | |
2869 | /* Perform any deferred checks pertaining to debug information. */ | |
2870 | ||
2871 | void | |
2872 | dwarf2dbg_final_check (void) | |
2873 | { | |
2874 | /* Perform reset-view checks. Don't evaluate view_assert_failed | |
2875 | recursively: it could be very deep. It's a chain of adds, with | |
2876 | each chain element pointing to the next in X_add_symbol, and | |
2877 | holding the check value in X_op_symbol. */ | |
2878 | while (view_assert_failed) | |
2879 | { | |
723dfee7 | 2880 | expressionS *exp; |
ba8826a8 AO |
2881 | symbolS *sym; |
2882 | offsetT failed; | |
2883 | ||
2884 | gas_assert (!symbol_resolved_p (view_assert_failed)); | |
2885 | ||
723dfee7 | 2886 | exp = symbol_get_value_expression (view_assert_failed); |
ba8826a8 AO |
2887 | sym = view_assert_failed; |
2888 | ||
2889 | /* If view_assert_failed looks like a compound check in the | |
2890 | chain, break it up. */ | |
723dfee7 | 2891 | if (exp->X_op == O_add && exp->X_add_number == 0 && exp->X_unsigned) |
ba8826a8 | 2892 | { |
723dfee7 HPN |
2893 | view_assert_failed = exp->X_add_symbol; |
2894 | sym = exp->X_op_symbol; | |
ba8826a8 AO |
2895 | } |
2896 | else | |
2897 | view_assert_failed = NULL; | |
2898 | ||
2899 | failed = resolve_symbol_value (sym); | |
2900 | if (!symbol_resolved_p (sym) || failed) | |
2901 | { | |
2902 | as_bad (_("view number mismatch")); | |
2903 | break; | |
2904 | } | |
2905 | } | |
2906 | } |