Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
7ddd14de | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
2da5c037 | 3 | Free Software Foundation, Inc. |
fac0d250 RH |
4 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
fac0d250 RH |
11 | any later version. |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
fac0d250 | 22 | |
89b66cde | 23 | /* Logical line numbers can be controlled by the compiler via the |
bd0eb99b | 24 | following directives: |
fac0d250 RH |
25 | |
26 | .file FILENO "file.c" | |
ecea7679 RH |
27 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
28 | [epilogue_begin] [is_stmt VALUE] [isa 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 | ||
fac0d250 RH |
79 | #include "subsegs.h" |
80 | ||
d9ac5a3b | 81 | #include "elf/dwarf2.h" |
fac0d250 | 82 | |
fac0d250 RH |
83 | /* Since we can't generate the prolog until the body is complete, we |
84 | use three different subsegments for .debug_line: one holding the | |
85 | prolog, one for the directory and filename info, and one for the | |
86 | body ("statement program"). */ | |
87 | #define DL_PROLOG 0 | |
88 | #define DL_FILES 1 | |
89 | #define DL_BODY 2 | |
90 | ||
1737851b BW |
91 | /* If linker relaxation might change offsets in the code, the DWARF special |
92 | opcodes and variable-length operands cannot be used. If this macro is | |
93 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
94 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
95 | # define DWARF2_USE_FIXED_ADVANCE_PC 0 | |
96 | #endif | |
97 | ||
fac0d250 RH |
98 | /* First special line opcde - leave room for the standard opcodes. |
99 | Note: If you want to change this, you'll have to update the | |
100 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
101 | out_debug_line(). */ |
102 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
103 | |
104 | #ifndef DWARF2_LINE_BASE | |
105 | /* Minimum line offset in a special line info. opcode. This value | |
106 | was chosen to give a reasonable range of values. */ | |
107 | # define DWARF2_LINE_BASE -5 | |
108 | #endif | |
109 | ||
110 | /* Range of line offsets in a special line info. opcode. */ | |
111 | #ifndef DWARF2_LINE_RANGE | |
112 | # define DWARF2_LINE_RANGE 14 | |
113 | #endif | |
114 | ||
115 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
116 | /* Define the architecture-dependent minimum instruction length (in | |
117 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 118 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
119 | #endif |
120 | ||
bd0eb99b | 121 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
122 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
123 | ||
cb30237e | 124 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
125 | #define SPECIAL_LINE(op) \ |
126 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
127 | ||
128 | /* Given a special op, return the address skip amount (in units of | |
129 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
130 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
131 | ||
cb30237e | 132 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
133 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
134 | ||
ee515fb7 | 135 | struct line_entry { |
220e750f | 136 | struct line_entry *next; |
07a53e5c | 137 | symbolS *label; |
220e750f | 138 | struct dwarf2_line_info loc; |
e6c774b4 | 139 | }; |
fac0d250 | 140 | |
ee515fb7 | 141 | struct line_subseg { |
220e750f RH |
142 | struct line_subseg *next; |
143 | subsegT subseg; | |
144 | struct line_entry *head; | |
145 | struct line_entry **ptail; | |
146 | }; | |
353e2c69 | 147 | |
ee515fb7 | 148 | struct line_seg { |
220e750f RH |
149 | struct line_seg *next; |
150 | segT seg; | |
151 | struct line_subseg *head; | |
152 | symbolS *text_start; | |
153 | symbolS *text_end; | |
154 | }; | |
155 | ||
156 | /* Collects data for all line table entries during assembly. */ | |
157 | static struct line_seg *all_segs; | |
158 | ||
ee515fb7 | 159 | struct file_entry { |
a7ed1ca2 | 160 | const char *filename; |
220e750f RH |
161 | unsigned int dir; |
162 | }; | |
163 | ||
164 | /* Table of files used by .debug_line. */ | |
165 | static struct file_entry *files; | |
166 | static unsigned int files_in_use; | |
167 | static unsigned int files_allocated; | |
168 | ||
a7ed1ca2 NC |
169 | /* Table of directories used by .debug_line. */ |
170 | static char **dirs; | |
171 | static unsigned int dirs_in_use; | |
172 | static unsigned int dirs_allocated; | |
173 | ||
b34976b6 | 174 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 175 | doing work when there's nothing to do. */ |
1eee4adc | 176 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 177 | |
07a53e5c RH |
178 | /* TRUE when we're supposed to set the basic block mark whenever a |
179 | label is seen. */ | |
180 | bfd_boolean dwarf2_loc_mark_labels; | |
181 | ||
220e750f | 182 | /* Current location as indicated by the most recent .loc directive. */ |
bd0eb99b RH |
183 | static struct dwarf2_line_info current = { |
184 | 1, 1, 0, 0, | |
185 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0 | |
186 | }; | |
220e750f | 187 | |
220e750f RH |
188 | /* The size of an address on the target. */ |
189 | static unsigned int sizeof_address; | |
190 | \f | |
a2e22468 | 191 | static unsigned int get_filenum (const char *, unsigned int); |
413a266c | 192 | |
c5c0a210 | 193 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 194 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 195 | |
6174d9c8 RH |
196 | /* Create an offset to .dwarf2_*. */ |
197 | ||
198 | static void | |
a2e22468 | 199 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 RH |
200 | { |
201 | expressionS expr; | |
202 | ||
203 | expr.X_op = O_symbol; | |
204 | expr.X_add_symbol = symbol; | |
205 | expr.X_add_number = 0; | |
206 | emit_expr (&expr, size); | |
207 | } | |
c5c0a210 | 208 | #endif |
6174d9c8 | 209 | |
220e750f RH |
210 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
211 | ||
212 | static struct line_subseg * | |
a2e22468 | 213 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
214 | { |
215 | static segT last_seg; | |
216 | static subsegT last_subseg; | |
217 | static struct line_subseg *last_line_subseg; | |
218 | ||
001ae1a4 | 219 | struct line_seg **ps, *s; |
220e750f | 220 | struct line_subseg **pss, *ss; |
fac0d250 | 221 | |
220e750f RH |
222 | if (seg == last_seg && subseg == last_subseg) |
223 | return last_line_subseg; | |
224 | ||
001ae1a4 | 225 | for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next) |
220e750f RH |
226 | if (s->seg == seg) |
227 | goto found_seg; | |
228 | ||
229 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
001ae1a4 | 230 | s->next = NULL; |
220e750f RH |
231 | s->seg = seg; |
232 | s->head = NULL; | |
001ae1a4 | 233 | *ps = s; |
220e750f RH |
234 | |
235 | found_seg: | |
236 | for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) | |
fac0d250 | 237 | { |
220e750f | 238 | if (ss->subseg == subseg) |
ee515fb7 | 239 | goto found_subseg; |
220e750f RH |
240 | if (ss->subseg > subseg) |
241 | break; | |
fac0d250 | 242 | } |
220e750f RH |
243 | |
244 | ss = (struct line_subseg *) xmalloc (sizeof (*ss)); | |
245 | ss->next = *pss; | |
246 | ss->subseg = subseg; | |
247 | ss->head = NULL; | |
248 | ss->ptail = &ss->head; | |
249 | *pss = ss; | |
250 | ||
251 | found_subseg: | |
252 | last_seg = seg; | |
253 | last_subseg = subseg; | |
254 | last_line_subseg = ss; | |
255 | ||
256 | return ss; | |
fac0d250 RH |
257 | } |
258 | ||
07a53e5c RH |
259 | /* Record an entry for LOC occurring at LABEL. */ |
260 | ||
261 | static void | |
262 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) | |
263 | { | |
264 | struct line_subseg *ss; | |
265 | struct line_entry *e; | |
266 | ||
267 | e = (struct line_entry *) xmalloc (sizeof (*e)); | |
268 | e->next = NULL; | |
269 | e->label = label; | |
270 | e->loc = *loc; | |
271 | ||
272 | ss = get_line_subseg (now_seg, now_subseg); | |
273 | *ss->ptail = e; | |
274 | ss->ptail = &e->next; | |
275 | } | |
276 | ||
436d9e46 | 277 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 278 | |
220e750f | 279 | void |
a2e22468 | 280 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 281 | { |
1ea5c325 MS |
282 | static unsigned int line = -1; |
283 | static unsigned int filenum = -1; | |
220e750f | 284 | |
07a53e5c RH |
285 | symbolS *sym; |
286 | ||
220e750f RH |
287 | /* Early out for as-yet incomplete location information. */ |
288 | if (loc->filenum == 0 || loc->line == 0) | |
289 | return; | |
290 | ||
ffa554ed GK |
291 | /* Don't emit sequences of line symbols for the same line when the |
292 | symbols apply to assembler code. It is necessary to emit | |
293 | duplicate line symbols when a compiler asks for them, because GDB | |
294 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 295 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 296 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
297 | return; |
298 | ||
299 | line = loc->line; | |
300 | filenum = loc->filenum; | |
301 | ||
07a53e5c RH |
302 | sym = symbol_temp_new (now_seg, ofs, frag_now); |
303 | dwarf2_gen_line_info_1 (sym, loc); | |
220e750f | 304 | } |
fac0d250 | 305 | |
ecea7679 RH |
306 | /* Returns the current source information. If .file directives have |
307 | been encountered, the info for the corresponding source file is | |
308 | returned. Otherwise, the info for the assembly source file is | |
309 | returned. */ | |
310 | ||
220e750f | 311 | void |
a2e22468 | 312 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
313 | { |
314 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 315 | { |
220e750f RH |
316 | char *filename; |
317 | as_where (&filename, &line->line); | |
a7ed1ca2 | 318 | line->filenum = get_filenum (filename, 0); |
220e750f | 319 | line->column = 0; |
bd0eb99b | 320 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 321 | line->isa = current.isa; |
fac0d250 | 322 | } |
220e750f RH |
323 | else |
324 | *line = current; | |
fac0d250 RH |
325 | } |
326 | ||
7fd3924a | 327 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
328 | machine of isa changes when assembler debug info is enabled. */ |
329 | ||
330 | void | |
331 | dwarf2_set_isa (unsigned int isa) | |
332 | { | |
333 | current.isa = isa; | |
334 | } | |
335 | ||
220e750f RH |
336 | /* Called for each machine instruction, or relatively atomic group of |
337 | machine instructions (ie built-in macro). The instruction or group | |
338 | is SIZE bytes in length. If dwarf2 line number generation is called | |
339 | for, emit a line statement appropriately. */ | |
353e2c69 | 340 | |
220e750f | 341 | void |
a2e22468 | 342 | dwarf2_emit_insn (int size) |
fac0d250 | 343 | { |
220e750f | 344 | struct dwarf2_line_info loc; |
fac0d250 | 345 | |
7fd3924a | 346 | if (!dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2) |
220e750f | 347 | return; |
7fd3924a AM |
348 | |
349 | dwarf2_where (&loc); | |
b6675117 | 350 | |
220e750f | 351 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
661ba50f BW |
352 | dwarf2_consume_line_info (); |
353 | } | |
354 | ||
355 | /* Called after the current line information has been either used with | |
356 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
357 | This resets the state of the line number information to reflect that | |
358 | it has been used. */ | |
359 | ||
360 | void | |
361 | dwarf2_consume_line_info (void) | |
362 | { | |
363 | /* Unless we generate DWARF2 debugging information for each | |
364 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 365 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
366 | |
367 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
368 | | DWARF2_FLAG_PROLOGUE_END | |
369 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
220e750f | 370 | } |
fac0d250 | 371 | |
07a53e5c RH |
372 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
373 | is enabled, emit a basic block marker. */ | |
374 | ||
375 | void | |
376 | dwarf2_emit_label (symbolS *label) | |
377 | { | |
378 | struct dwarf2_line_info loc; | |
379 | ||
380 | if (!dwarf2_loc_mark_labels) | |
381 | return; | |
382 | if (S_GET_SEGMENT (label) != now_seg) | |
383 | return; | |
384 | if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)) | |
385 | return; | |
7fd3924a AM |
386 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
387 | return; | |
388 | ||
389 | dwarf2_where (&loc); | |
07a53e5c RH |
390 | |
391 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
392 | ||
07a53e5c | 393 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 394 | dwarf2_consume_line_info (); |
07a53e5c RH |
395 | } |
396 | ||
a7ed1ca2 NC |
397 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
398 | allocate it on that file table slot, otherwise return the first | |
399 | empty one. */ | |
220e750f RH |
400 | |
401 | static unsigned int | |
a2e22468 | 402 | get_filenum (const char *filename, unsigned int num) |
220e750f | 403 | { |
a7ed1ca2 NC |
404 | static unsigned int last_used, last_used_dir_len; |
405 | const char *file; | |
406 | size_t dir_len; | |
407 | unsigned int i, dir; | |
220e750f | 408 | |
a7ed1ca2 NC |
409 | if (num == 0 && last_used) |
410 | { | |
411 | if (! files[last_used].dir | |
412 | && strcmp (filename, files[last_used].filename) == 0) | |
413 | return last_used; | |
414 | if (files[last_used].dir | |
415 | && strncmp (filename, dirs[files[last_used].dir], | |
416 | last_used_dir_len) == 0 | |
417 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
418 | && strcmp (filename + last_used_dir_len + 1, | |
419 | files[last_used].filename) == 0) | |
420 | return last_used; | |
421 | } | |
220e750f | 422 | |
a7ed1ca2 NC |
423 | file = lbasename (filename); |
424 | /* Don't make empty string from / or A: from A:/ . */ | |
425 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
426 | if (file <= filename + 3) | |
427 | file = filename; | |
428 | #else | |
429 | if (file == filename + 1) | |
430 | file = filename; | |
431 | #endif | |
432 | dir_len = file - filename; | |
433 | ||
434 | dir = 0; | |
435 | if (dir_len) | |
436 | { | |
437 | --dir_len; | |
438 | for (dir = 1; dir < dirs_in_use; ++dir) | |
4dde8e61 | 439 | if (strncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
440 | && dirs[dir][dir_len] == '\0') |
441 | break; | |
442 | ||
443 | if (dir >= dirs_in_use) | |
444 | { | |
445 | if (dir >= dirs_allocated) | |
446 | { | |
447 | dirs_allocated = dir + 32; | |
448 | dirs = (char **) | |
449 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
450 | } | |
451 | ||
452 | dirs[dir] = xmalloc (dir_len + 1); | |
453 | memcpy (dirs[dir], filename, dir_len); | |
454 | dirs[dir][dir_len] = '\0'; | |
455 | dirs_in_use = dir + 1; | |
456 | } | |
457 | } | |
458 | ||
459 | if (num == 0) | |
460 | { | |
461 | for (i = 1; i < files_in_use; ++i) | |
462 | if (files[i].dir == dir | |
88b4ca40 | 463 | && files[i].filename |
a7ed1ca2 NC |
464 | && strcmp (file, files[i].filename) == 0) |
465 | { | |
466 | last_used = i; | |
467 | last_used_dir_len = dir_len; | |
468 | return i; | |
469 | } | |
470 | } | |
471 | else | |
472 | i = num; | |
220e750f RH |
473 | |
474 | if (i >= files_allocated) | |
fac0d250 | 475 | { |
249e3833 RH |
476 | unsigned int old = files_allocated; |
477 | ||
220e750f RH |
478 | files_allocated = i + 32; |
479 | files = (struct file_entry *) | |
ee515fb7 | 480 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
481 | |
482 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
483 | } |
484 | ||
a7ed1ca2 NC |
485 | files[i].filename = num ? file : xstrdup (file); |
486 | files[i].dir = dir; | |
10cd14b4 AM |
487 | if (files_in_use < i + 1) |
488 | files_in_use = i + 1; | |
220e750f | 489 | last_used = i; |
a7ed1ca2 | 490 | last_used_dir_len = dir_len; |
220e750f RH |
491 | |
492 | return i; | |
493 | } | |
fac0d250 | 494 | |
ecb4347a DJ |
495 | /* Handle two forms of .file directive: |
496 | - Pass .file "source.c" to s_app_file | |
497 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 498 | |
ecb4347a DJ |
499 | If an entry is added to the file table, return a pointer to the filename. */ |
500 | ||
501 | char * | |
a2e22468 | 502 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
503 | { |
504 | offsetT num; | |
e46d99eb | 505 | char *filename; |
220e750f RH |
506 | int filename_len; |
507 | ||
508 | /* Continue to accept a bare string and pass it off. */ | |
509 | SKIP_WHITESPACE (); | |
510 | if (*input_line_pointer == '"') | |
fac0d250 | 511 | { |
220e750f | 512 | s_app_file (0); |
ecb4347a | 513 | return NULL; |
fac0d250 RH |
514 | } |
515 | ||
220e750f RH |
516 | num = get_absolute_expression (); |
517 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
518 | if (filename == NULL) |
519 | return NULL; | |
220e750f RH |
520 | demand_empty_rest_of_line (); |
521 | ||
249e3833 | 522 | if (num < 1) |
fac0d250 | 523 | { |
0e389e77 | 524 | as_bad (_("file number less than one")); |
ecb4347a | 525 | return NULL; |
fac0d250 RH |
526 | } |
527 | ||
7cadeb2c AM |
528 | /* A .file directive implies compiler generated debug information is |
529 | being supplied. Turn off gas generated debug info. */ | |
530 | debug_type = DEBUG_NONE; | |
531 | ||
0e1a166b | 532 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 533 | { |
0e389e77 | 534 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 535 | return NULL; |
249e3833 | 536 | } |
220e750f | 537 | |
a7ed1ca2 | 538 | get_filenum (filename, num); |
ecb4347a DJ |
539 | |
540 | return filename; | |
fac0d250 RH |
541 | } |
542 | ||
220e750f | 543 | void |
a2e22468 | 544 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 545 | { |
ecea7679 RH |
546 | offsetT filenum, line; |
547 | ||
851feff8 DJ |
548 | /* If we see two .loc directives in a row, force the first one to be |
549 | output now. */ | |
7cadeb2c | 550 | if (dwarf2_loc_directive_seen) |
851feff8 DJ |
551 | dwarf2_emit_insn (0); |
552 | ||
ecea7679 RH |
553 | filenum = get_absolute_expression (); |
554 | SKIP_WHITESPACE (); | |
555 | line = get_absolute_expression (); | |
556 | ||
557 | if (filenum < 1) | |
558 | { | |
559 | as_bad (_("file number less than one")); | |
560 | return; | |
561 | } | |
562 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
563 | { | |
564 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
565 | return; | |
566 | } | |
567 | ||
568 | current.filenum = filenum; | |
569 | current.line = line; | |
570 | ||
571 | #ifndef NO_LISTING | |
572 | if (listing) | |
573 | { | |
574 | if (files[filenum].dir) | |
575 | { | |
576 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
577 | size_t file_len = strlen (files[filenum].filename); | |
578 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
579 | ||
580 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 581 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
582 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
583 | cp[dir_len + file_len + 1] = '\0'; | |
584 | listing_source_file (cp); | |
585 | } | |
586 | else | |
587 | listing_source_file (files[filenum].filename); | |
588 | listing_source_line (line); | |
589 | } | |
590 | #endif | |
591 | ||
220e750f | 592 | SKIP_WHITESPACE (); |
ecea7679 RH |
593 | if (ISDIGIT (*input_line_pointer)) |
594 | { | |
595 | current.column = get_absolute_expression (); | |
596 | SKIP_WHITESPACE (); | |
597 | } | |
598 | ||
599 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 600 | { |
bd0eb99b RH |
601 | char *p, c; |
602 | offsetT value; | |
603 | ||
604 | p = input_line_pointer; | |
605 | c = get_symbol_end (); | |
606 | ||
607 | if (strcmp (p, "basic_block") == 0) | |
608 | { | |
609 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
610 | *input_line_pointer = c; | |
611 | } | |
612 | else if (strcmp (p, "prologue_end") == 0) | |
613 | { | |
614 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
615 | *input_line_pointer = c; | |
616 | } | |
617 | else if (strcmp (p, "epilogue_begin") == 0) | |
618 | { | |
619 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
620 | *input_line_pointer = c; | |
621 | } | |
622 | else if (strcmp (p, "is_stmt") == 0) | |
623 | { | |
624 | *input_line_pointer = c; | |
625 | value = get_absolute_expression (); | |
626 | if (value == 0) | |
627 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
628 | else if (value == 1) | |
629 | current.flags |= DWARF2_FLAG_IS_STMT; | |
630 | else | |
ecea7679 RH |
631 | { |
632 | as_bad (_("is_stmt value not 0 or 1")); | |
633 | return; | |
634 | } | |
bd0eb99b RH |
635 | } |
636 | else if (strcmp (p, "isa") == 0) | |
637 | { | |
7fd3924a | 638 | *input_line_pointer = c; |
bd0eb99b | 639 | value = get_absolute_expression (); |
ecea7679 | 640 | if (value >= 0) |
bd0eb99b | 641 | current.isa = value; |
ecea7679 RH |
642 | else |
643 | { | |
644 | as_bad (_("isa number less than zero")); | |
645 | return; | |
646 | } | |
bd0eb99b RH |
647 | } |
648 | else | |
649 | { | |
ecea7679 | 650 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
7fd3924a | 651 | *input_line_pointer = c; |
bd0eb99b RH |
652 | return; |
653 | } | |
654 | ||
ecea7679 | 655 | SKIP_WHITESPACE (); |
bd0eb99b RH |
656 | } |
657 | ||
658 | demand_empty_rest_of_line (); | |
1eee4adc | 659 | dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 660 | debug_type = DEBUG_NONE; |
220e750f | 661 | } |
07a53e5c RH |
662 | |
663 | void | |
664 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
665 | { | |
666 | offsetT value = get_absolute_expression (); | |
667 | ||
668 | if (value != 0 && value != 1) | |
669 | { | |
670 | as_bad (_("expected 0 or 1")); | |
671 | ignore_rest_of_line (); | |
672 | } | |
673 | else | |
674 | { | |
675 | dwarf2_loc_mark_labels = value != 0; | |
676 | demand_empty_rest_of_line (); | |
677 | } | |
678 | } | |
220e750f RH |
679 | \f |
680 | static struct frag * | |
a2e22468 | 681 | first_frag_for_seg (segT seg) |
220e750f | 682 | { |
c9049d30 | 683 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
684 | } |
685 | ||
686 | static struct frag * | |
a2e22468 | 687 | last_frag_for_seg (segT seg) |
220e750f | 688 | { |
c9049d30 | 689 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 690 | |
c9049d30 AM |
691 | while (f->frch_next != NULL) |
692 | f = f->frch_next; | |
220e750f | 693 | |
c9049d30 | 694 | return f->frch_last; |
220e750f RH |
695 | } |
696 | \f | |
697 | /* Emit a single byte into the current segment. */ | |
698 | ||
699 | static inline void | |
a2e22468 | 700 | out_byte (int byte) |
220e750f RH |
701 | { |
702 | FRAG_APPEND_1_CHAR (byte); | |
703 | } | |
704 | ||
705 | /* Emit a statement program opcode into the current segment. */ | |
706 | ||
707 | static inline void | |
a2e22468 | 708 | out_opcode (int opc) |
220e750f RH |
709 | { |
710 | out_byte (opc); | |
711 | } | |
712 | ||
713 | /* Emit a two-byte word into the current segment. */ | |
714 | ||
715 | static inline void | |
a2e22468 | 716 | out_two (int data) |
220e750f RH |
717 | { |
718 | md_number_to_chars (frag_more (2), data, 2); | |
719 | } | |
720 | ||
721 | /* Emit a four byte word into the current segment. */ | |
722 | ||
723 | static inline void | |
a2e22468 | 724 | out_four (int data) |
220e750f RH |
725 | { |
726 | md_number_to_chars (frag_more (4), data, 4); | |
727 | } | |
728 | ||
729 | /* Emit an unsigned "little-endian base 128" number. */ | |
730 | ||
fac0d250 | 731 | static void |
a2e22468 | 732 | out_uleb128 (addressT value) |
220e750f RH |
733 | { |
734 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
735 | } | |
736 | ||
737 | /* Emit a tuple for .debug_abbrev. */ | |
738 | ||
739 | static inline void | |
a2e22468 | 740 | out_abbrev (int name, int form) |
fac0d250 | 741 | { |
220e750f RH |
742 | out_uleb128 (name); |
743 | out_uleb128 (form); | |
744 | } | |
fac0d250 | 745 | |
220e750f | 746 | /* Get the size of a fragment. */ |
fac0d250 | 747 | |
220e750f | 748 | static offsetT |
c9049d30 | 749 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
750 | { |
751 | frchainS *fr; | |
752 | ||
753 | if (frag->fr_next) | |
754 | return frag->fr_fix; | |
755 | ||
756 | /* If a fragment is the last in the chain, special measures must be | |
757 | taken to find its size before relaxation, since it may be pending | |
758 | on some subsegment chain. */ | |
c9049d30 | 759 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 760 | if (fr->frch_last == frag) |
c5c0a210 | 761 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
762 | |
763 | abort (); | |
764 | } | |
fac0d250 | 765 | |
220e750f | 766 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 767 | |
220e750f | 768 | static void |
07a53e5c | 769 | out_set_addr (symbolS *sym) |
220e750f RH |
770 | { |
771 | expressionS expr; | |
9e3af0e7 | 772 | |
fac0d250 | 773 | out_opcode (DW_LNS_extended_op); |
220e750f | 774 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
775 | |
776 | out_opcode (DW_LNE_set_address); | |
777 | expr.X_op = O_symbol; | |
778 | expr.X_add_symbol = sym; | |
779 | expr.X_add_number = 0; | |
220e750f | 780 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
781 | } |
782 | ||
a3b75434 | 783 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 784 | static void scale_addr_delta (addressT *); |
c8970b4b | 785 | |
a3b75434 | 786 | static void |
d7342424 | 787 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
788 | { |
789 | static int printed_this = 0; | |
790 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
791 | { | |
792 | if (!printed_this) | |
793 | as_bad("unaligned opcodes detected in executable segment"); | |
794 | printed_this = 1; | |
795 | } | |
796 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
797 | } | |
798 | #else | |
799 | #define scale_addr_delta(A) | |
800 | #endif | |
801 | ||
220e750f RH |
802 | /* Encode a pair of line and address skips as efficiently as possible. |
803 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 804 | |
220e750f RH |
805 | The following two routines *must* be kept in sync. This is |
806 | enforced by making emit_inc_line_addr abort if we do not emit | |
807 | exactly the expected number of bytes. */ | |
808 | ||
809 | static int | |
a2e22468 | 810 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 811 | { |
220e750f RH |
812 | unsigned int tmp, opcode; |
813 | int len = 0; | |
fac0d250 | 814 | |
220e750f | 815 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 816 | scale_addr_delta (&addr_delta); |
220e750f RH |
817 | |
818 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
819 | We cannot use special opcodes here, since we want the end_sequence | |
820 | to emit the matrix entry. */ | |
821 | if (line_delta == INT_MAX) | |
fac0d250 | 822 | { |
220e750f RH |
823 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
824 | len = 1; | |
fac0d250 | 825 | else |
220e750f RH |
826 | len = 1 + sizeof_leb128 (addr_delta, 0); |
827 | return len + 3; | |
fac0d250 | 828 | } |
fac0d250 | 829 | |
220e750f RH |
830 | /* Bias the line delta by the base. */ |
831 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 832 | |
220e750f RH |
833 | /* If the line increment is out of range of a special opcode, we |
834 | must encode it with DW_LNS_advance_line. */ | |
835 | if (tmp >= DWARF2_LINE_RANGE) | |
836 | { | |
837 | len = 1 + sizeof_leb128 (line_delta, 1); | |
838 | line_delta = 0; | |
839 | tmp = 0 - DWARF2_LINE_BASE; | |
840 | } | |
fac0d250 | 841 | |
220e750f RH |
842 | /* Bias the opcode by the special opcode base. */ |
843 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 844 | |
220e750f RH |
845 | /* Avoid overflow when addr_delta is large. */ |
846 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
847 | { | |
848 | /* Try using a special opcode. */ | |
849 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
850 | if (opcode <= 255) | |
851 | return len + 1; | |
852 | ||
853 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
854 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
855 | if (opcode <= 255) | |
856 | return len + 2; | |
857 | } | |
858 | ||
859 | /* Otherwise use DW_LNS_advance_pc. */ | |
860 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
861 | ||
862 | /* DW_LNS_copy or special opcode. */ | |
863 | len += 1; | |
864 | ||
865 | return len; | |
866 | } | |
fac0d250 | 867 | |
220e750f | 868 | static void |
a2e22468 | 869 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
870 | { |
871 | unsigned int tmp, opcode; | |
872 | int need_copy = 0; | |
873 | char *end = p + len; | |
fac0d250 | 874 | |
07a53e5c RH |
875 | /* Line number sequences cannot go backward in addresses. This means |
876 | we've incorrectly ordered the statements in the sequence. */ | |
877 | assert ((offsetT) addr_delta >= 0); | |
878 | ||
220e750f | 879 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
880 | scale_addr_delta (&addr_delta); |
881 | ||
220e750f RH |
882 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
883 | We cannot use special opcodes here, since we want the end_sequence | |
884 | to emit the matrix entry. */ | |
885 | if (line_delta == INT_MAX) | |
fac0d250 | 886 | { |
220e750f RH |
887 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
888 | *p++ = DW_LNS_const_add_pc; | |
889 | else | |
fac0d250 | 890 | { |
220e750f RH |
891 | *p++ = DW_LNS_advance_pc; |
892 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 893 | } |
220e750f RH |
894 | |
895 | *p++ = DW_LNS_extended_op; | |
896 | *p++ = 1; | |
897 | *p++ = DW_LNE_end_sequence; | |
898 | goto done; | |
fac0d250 RH |
899 | } |
900 | ||
220e750f RH |
901 | /* Bias the line delta by the base. */ |
902 | tmp = line_delta - DWARF2_LINE_BASE; | |
903 | ||
904 | /* If the line increment is out of range of a special opcode, we | |
905 | must encode it with DW_LNS_advance_line. */ | |
906 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 907 | { |
220e750f RH |
908 | *p++ = DW_LNS_advance_line; |
909 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 910 | |
220e750f RH |
911 | line_delta = 0; |
912 | tmp = 0 - DWARF2_LINE_BASE; | |
913 | need_copy = 1; | |
914 | } | |
fac0d250 | 915 | |
bd0eb99b RH |
916 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
917 | special opcode. */ | |
918 | if (line_delta == 0 && addr_delta == 0) | |
919 | { | |
920 | *p++ = DW_LNS_copy; | |
921 | goto done; | |
922 | } | |
923 | ||
220e750f RH |
924 | /* Bias the opcode by the special opcode base. */ |
925 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 926 | |
220e750f RH |
927 | /* Avoid overflow when addr_delta is large. */ |
928 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 929 | { |
220e750f RH |
930 | /* Try using a special opcode. */ |
931 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
932 | if (opcode <= 255) | |
933 | { | |
934 | *p++ = opcode; | |
935 | goto done; | |
936 | } | |
937 | ||
938 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
939 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
940 | if (opcode <= 255) | |
fac0d250 | 941 | { |
220e750f RH |
942 | *p++ = DW_LNS_const_add_pc; |
943 | *p++ = opcode; | |
944 | goto done; | |
fac0d250 RH |
945 | } |
946 | } | |
220e750f RH |
947 | |
948 | /* Otherwise use DW_LNS_advance_pc. */ | |
949 | *p++ = DW_LNS_advance_pc; | |
950 | p += output_leb128 (p, addr_delta, 0); | |
951 | ||
952 | if (need_copy) | |
953 | *p++ = DW_LNS_copy; | |
fac0d250 | 954 | else |
220e750f | 955 | *p++ = tmp; |
fac0d250 | 956 | |
220e750f RH |
957 | done: |
958 | assert (p == end); | |
959 | } | |
a8316fe2 | 960 | |
220e750f | 961 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 962 | |
220e750f | 963 | static void |
a2e22468 | 964 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
965 | { |
966 | int len = size_inc_line_addr (line_delta, addr_delta); | |
967 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
968 | } | |
9de8d8f1 | 969 | |
1737851b BW |
970 | /* Write out an alternative form of line and address skips using |
971 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
972 | line and address information, but it is required if linker relaxation |
973 | could change the code offsets. The following two routines *must* be | |
974 | kept in sync. */ | |
1737851b | 975 | |
7ddd14de BW |
976 | static int |
977 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 978 | { |
7ddd14de | 979 | int len = 0; |
1737851b BW |
980 | |
981 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
982 | if (line_delta != INT_MAX) |
983 | len = 1 + sizeof_leb128 (line_delta, 1); | |
984 | ||
985 | if (addr_delta > 50000) | |
986 | { | |
987 | /* DW_LNS_extended_op */ | |
988 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
989 | /* DW_LNE_set_address */ | |
990 | len += 1 + sizeof_address; | |
991 | } | |
992 | else | |
993 | /* DW_LNS_fixed_advance_pc */ | |
994 | len += 3; | |
995 | ||
1737851b | 996 | if (line_delta == INT_MAX) |
7ddd14de BW |
997 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
998 | len += 3; | |
999 | else | |
1000 | /* DW_LNS_copy */ | |
1001 | len += 1; | |
1002 | ||
1003 | return len; | |
1004 | } | |
1005 | ||
1006 | static void | |
1007 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1008 | char *p, int len) | |
1009 | { | |
1010 | expressionS *exp; | |
1011 | segT line_seg; | |
1012 | char *end = p + len; | |
1013 | ||
1014 | /* Line number sequences cannot go backward in addresses. This means | |
1015 | we've incorrectly ordered the statements in the sequence. */ | |
1016 | assert ((offsetT) addr_delta >= 0); | |
1017 | ||
1018 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
1019 | if (line_delta != INT_MAX) | |
1020 | { | |
1021 | *p++ = DW_LNS_advance_line; | |
1022 | p += output_leb128 (p, line_delta, 1); | |
1023 | } | |
1024 | ||
1025 | exp = symbol_get_value_expression (frag->fr_symbol); | |
1026 | line_seg = subseg_get (".debug_line", 0); | |
1027 | ||
1028 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1029 | advance the address by at most 64K. Linker relaxation (without | |
1030 | which this function would not be used) could change the operand by | |
1031 | an unknown amount. If the address increment is getting close to | |
1032 | the limit, just reset the address. */ | |
1033 | if (addr_delta > 50000) | |
1737851b | 1034 | { |
7ddd14de BW |
1035 | symbolS *to_sym; |
1036 | expressionS expr; | |
1037 | ||
1038 | assert (exp->X_op = O_subtract); | |
1039 | to_sym = exp->X_add_symbol; | |
1040 | ||
1041 | *p++ = DW_LNS_extended_op; | |
1042 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1043 | *p++ = DW_LNE_set_address; | |
1044 | expr.X_op = O_symbol; | |
1737851b | 1045 | expr.X_add_symbol = to_sym; |
1737851b | 1046 | expr.X_add_number = 0; |
7ddd14de BW |
1047 | subseg_change (line_seg, 0); |
1048 | emit_expr_fix (&expr, sizeof_address, frag, p); | |
1049 | p += sizeof_address; | |
1050 | } | |
1051 | else | |
1052 | { | |
1053 | *p++ = DW_LNS_fixed_advance_pc; | |
1054 | subseg_change (line_seg, 0); | |
1055 | emit_expr_fix (exp, 2, frag, p); | |
1056 | p += 2; | |
1737851b BW |
1057 | } |
1058 | ||
7ddd14de BW |
1059 | if (line_delta == INT_MAX) |
1060 | { | |
1061 | *p++ = DW_LNS_extended_op; | |
1062 | *p++ = 1; | |
1063 | *p++ = DW_LNE_end_sequence; | |
1064 | } | |
1065 | else | |
1066 | *p++ = DW_LNS_copy; | |
1737851b | 1067 | |
7ddd14de | 1068 | assert (p == end); |
1737851b BW |
1069 | } |
1070 | ||
220e750f RH |
1071 | /* Generate a variant frag that we can use to relax address/line |
1072 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1073 | |
220e750f | 1074 | static void |
07a53e5c | 1075 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1076 | { |
220e750f RH |
1077 | expressionS expr; |
1078 | int max_chars; | |
6576f0b5 | 1079 | |
220e750f RH |
1080 | expr.X_op = O_subtract; |
1081 | expr.X_add_symbol = to_sym; | |
1082 | expr.X_op_symbol = from_sym; | |
1083 | expr.X_add_number = 0; | |
fac0d250 | 1084 | |
220e750f RH |
1085 | /* The maximum size of the frag is the line delta with a maximum |
1086 | sized address delta. */ | |
7ddd14de BW |
1087 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1088 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1089 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1090 | else | |
1091 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1092 | |
220e750f RH |
1093 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
1094 | make_expr_symbol (&expr), line_delta, NULL); | |
1095 | } | |
fac0d250 | 1096 | |
220e750f RH |
1097 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1098 | based on the current values of the symbols. It is called before | |
1099 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1100 | |
220e750f | 1101 | int |
a2e22468 | 1102 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1103 | { |
1104 | offsetT addr_delta; | |
1105 | int size; | |
fac0d250 | 1106 | |
6386f3a7 | 1107 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1108 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1109 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1110 | else | |
1111 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1112 | |
220e750f | 1113 | frag->fr_subtype = size; |
fac0d250 | 1114 | |
220e750f RH |
1115 | return size; |
1116 | } | |
1117 | ||
1118 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1119 | current values of the symbols. fr_subtype is the current length | |
1120 | of the frag. This returns the change in frag length. */ | |
1121 | ||
1122 | int | |
a2e22468 | 1123 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1124 | { |
1125 | int old_size, new_size; | |
fac0d250 | 1126 | |
220e750f RH |
1127 | old_size = frag->fr_subtype; |
1128 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1129 | |
220e750f | 1130 | return new_size - old_size; |
fac0d250 RH |
1131 | } |
1132 | ||
220e750f RH |
1133 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1134 | fill frag. This is called after all relaxation has been done. | |
1135 | fr_subtype will be the desired length of the frag. */ | |
1136 | ||
1137 | void | |
a2e22468 | 1138 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1139 | { |
220e750f RH |
1140 | offsetT addr_diff; |
1141 | ||
6386f3a7 | 1142 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 1143 | |
220e750f RH |
1144 | /* fr_var carries the max_chars that we created the fragment with. |
1145 | fr_subtype carries the current expected length. We must, of | |
1146 | course, have allocated enough memory earlier. */ | |
bccba5f0 | 1147 | assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1148 | |
7ddd14de BW |
1149 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1150 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1151 | frag->fr_literal + frag->fr_fix, | |
1152 | frag->fr_subtype); | |
1153 | else | |
1154 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1155 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1156 | |
1157 | frag->fr_fix += frag->fr_subtype; | |
1158 | frag->fr_type = rs_fill; | |
1159 | frag->fr_var = 0; | |
1160 | frag->fr_offset = 0; | |
1161 | } | |
1162 | ||
1163 | /* Generate .debug_line content for the chain of line number entries | |
1164 | beginning at E, for segment SEG. */ | |
1165 | ||
1166 | static void | |
a2e22468 | 1167 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1168 | { |
1169 | unsigned filenum = 1; | |
1170 | unsigned line = 1; | |
1171 | unsigned column = 0; | |
bd0eb99b RH |
1172 | unsigned isa = 0; |
1173 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1174 | fragS *last_frag = NULL, *frag; |
1175 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1176 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1177 | struct line_entry *next; |
1178 | ||
fead5cd9 | 1179 | do |
fac0d250 | 1180 | { |
07a53e5c | 1181 | int line_delta; |
220e750f RH |
1182 | |
1183 | if (filenum != e->loc.filenum) | |
fac0d250 | 1184 | { |
220e750f RH |
1185 | filenum = e->loc.filenum; |
1186 | out_opcode (DW_LNS_set_file); | |
1187 | out_uleb128 (filenum); | |
220e750f RH |
1188 | } |
1189 | ||
1190 | if (column != e->loc.column) | |
1191 | { | |
1192 | column = e->loc.column; | |
1193 | out_opcode (DW_LNS_set_column); | |
1194 | out_uleb128 (column); | |
220e750f RH |
1195 | } |
1196 | ||
bd0eb99b RH |
1197 | if (isa != e->loc.isa) |
1198 | { | |
1199 | isa = e->loc.isa; | |
1200 | out_opcode (DW_LNS_set_isa); | |
1201 | out_uleb128 (isa); | |
bd0eb99b RH |
1202 | } |
1203 | ||
1204 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1205 | { |
1206 | flags = e->loc.flags; | |
1207 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1208 | } |
1209 | ||
bd0eb99b | 1210 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1211 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1212 | |
bd0eb99b | 1213 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1214 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1215 | |
1216 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1217 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1218 | |
fb81275c JM |
1219 | /* Don't try to optimize away redundant entries; gdb wants two |
1220 | entries for a function where the code starts on the same line as | |
1221 | the {, and there's no way to identify that case here. Trust gcc | |
1222 | to optimize appropriately. */ | |
07a53e5c RH |
1223 | line_delta = e->loc.line - line; |
1224 | lab = e->label; | |
1225 | frag = symbol_get_frag (lab); | |
1226 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1227 | |
07a53e5c | 1228 | if (last_frag == NULL) |
220e750f | 1229 | { |
07a53e5c RH |
1230 | out_set_addr (lab); |
1231 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1232 | } |
7ddd14de | 1233 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1234 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1235 | else | |
1236 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1237 | ||
1238 | line = e->loc.line; | |
1239 | last_lab = lab; | |
1240 | last_frag = frag; | |
1241 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1242 | |
1243 | next = e->next; | |
1244 | free (e); | |
1245 | e = next; | |
fac0d250 | 1246 | } |
fead5cd9 | 1247 | while (e); |
353e2c69 | 1248 | |
220e750f | 1249 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1250 | frag = last_frag_for_seg (seg); |
c9049d30 | 1251 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1252 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1253 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1254 | else |
07a53e5c RH |
1255 | { |
1256 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1257 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1258 | } | |
fac0d250 RH |
1259 | } |
1260 | ||
220e750f RH |
1261 | /* Emit the directory and file tables for .debug_line. */ |
1262 | ||
fac0d250 | 1263 | static void |
a2e22468 | 1264 | out_file_list (void) |
fac0d250 RH |
1265 | { |
1266 | size_t size; | |
3d6b762c | 1267 | const char *dir; |
fac0d250 | 1268 | char *cp; |
220e750f RH |
1269 | unsigned int i; |
1270 | ||
a7ed1ca2 NC |
1271 | /* Emit directory list. */ |
1272 | for (i = 1; i < dirs_in_use; ++i) | |
1273 | { | |
3d6b762c JM |
1274 | dir = remap_debug_filename (dirs[i]); |
1275 | size = strlen (dir) + 1; | |
a7ed1ca2 | 1276 | cp = frag_more (size); |
3d6b762c | 1277 | memcpy (cp, dir, size); |
a7ed1ca2 NC |
1278 | } |
1279 | /* Terminate it. */ | |
220e750f | 1280 | out_byte ('\0'); |
fac0d250 | 1281 | |
220e750f | 1282 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1283 | { |
249e3833 RH |
1284 | if (files[i].filename == NULL) |
1285 | { | |
0e389e77 | 1286 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1287 | /* Prevent a crash later, particularly for file 1. */ |
1288 | files[i].filename = ""; | |
249e3833 RH |
1289 | continue; |
1290 | } | |
1291 | ||
220e750f | 1292 | size = strlen (files[i].filename) + 1; |
fac0d250 | 1293 | cp = frag_more (size); |
220e750f | 1294 | memcpy (cp, files[i].filename, size); |
fac0d250 | 1295 | |
220e750f | 1296 | out_uleb128 (files[i].dir); /* directory number */ |
fac0d250 RH |
1297 | out_uleb128 (0); /* last modification timestamp */ |
1298 | out_uleb128 (0); /* filesize */ | |
1299 | } | |
353e2c69 KH |
1300 | |
1301 | /* Terminate filename list. */ | |
1302 | out_byte (0); | |
fac0d250 RH |
1303 | } |
1304 | ||
413a266c AM |
1305 | /* Switch to SEC and output a header length field. Return the size of |
1306 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
1307 | to the end of the section. */ | |
1308 | ||
1309 | static int | |
1310 | out_header (asection *sec, expressionS *expr) | |
1311 | { | |
1312 | symbolS *start_sym; | |
1313 | symbolS *end_sym; | |
1314 | ||
1315 | subseg_set (sec, 0); | |
1316 | start_sym = symbol_temp_new_now ();; | |
1317 | end_sym = symbol_temp_make (); | |
1318 | ||
1319 | /* Total length of the information. */ | |
1320 | expr->X_op = O_subtract; | |
1321 | expr->X_add_symbol = end_sym; | |
1322 | expr->X_op_symbol = start_sym; | |
1323 | ||
1324 | switch (DWARF2_FORMAT (sec)) | |
1325 | { | |
1326 | case dwarf2_format_32bit: | |
1327 | expr->X_add_number = -4; | |
1328 | emit_expr (expr, 4); | |
1329 | return 4; | |
1330 | ||
1331 | case dwarf2_format_64bit: | |
1332 | expr->X_add_number = -12; | |
1333 | out_four (-1); | |
1334 | emit_expr (expr, 8); | |
1335 | return 8; | |
1336 | ||
1337 | case dwarf2_format_64bit_irix: | |
1338 | expr->X_add_number = -8; | |
1339 | emit_expr (expr, 8); | |
1340 | return 8; | |
1341 | } | |
1342 | ||
1343 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
220e750f RH |
1347 | /* Emit the collected .debug_line data. */ |
1348 | ||
1349 | static void | |
a2e22468 | 1350 | out_debug_line (segT line_seg) |
220e750f RH |
1351 | { |
1352 | expressionS expr; | |
220e750f RH |
1353 | symbolS *prologue_end; |
1354 | symbolS *line_end; | |
1355 | struct line_seg *s; | |
14e777e0 | 1356 | int sizeof_offset; |
220e750f | 1357 | |
413a266c AM |
1358 | sizeof_offset = out_header (line_seg, &expr); |
1359 | line_end = expr.X_add_symbol; | |
220e750f RH |
1360 | |
1361 | /* Version. */ | |
1362 | out_two (2); | |
1363 | ||
1364 | /* Length of the prologue following this length. */ | |
413a266c | 1365 | prologue_end = symbol_temp_make (); |
220e750f | 1366 | expr.X_add_symbol = prologue_end; |
220e750f | 1367 | expr.X_add_number = - (4 + 2 + 4); |
14e777e0 | 1368 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1369 | |
1370 | /* Parameters of the state machine. */ | |
1371 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1372 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1373 | out_byte (DWARF2_LINE_BASE); | |
1374 | out_byte (DWARF2_LINE_RANGE); | |
1375 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1376 | ||
1377 | /* Standard opcode lengths. */ | |
1378 | out_byte (0); /* DW_LNS_copy */ | |
1379 | out_byte (1); /* DW_LNS_advance_pc */ | |
1380 | out_byte (1); /* DW_LNS_advance_line */ | |
1381 | out_byte (1); /* DW_LNS_set_file */ | |
1382 | out_byte (1); /* DW_LNS_set_column */ | |
1383 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1384 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1385 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1386 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1387 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1388 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1389 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1390 | |
1391 | out_file_list (); | |
1392 | ||
b7d6ed97 | 1393 | symbol_set_value_now (prologue_end); |
220e750f RH |
1394 | |
1395 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1396 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1397 | process_entries (s->seg, s->head->head); |
1398 | ||
b7d6ed97 | 1399 | symbol_set_value_now (line_end); |
220e750f RH |
1400 | } |
1401 | ||
802f5d9e NC |
1402 | static void |
1403 | out_debug_ranges (segT ranges_seg) | |
1404 | { | |
1405 | unsigned int addr_size = sizeof_address; | |
1406 | struct line_seg *s; | |
1407 | expressionS expr; | |
1408 | unsigned int i; | |
1409 | ||
1410 | subseg_set (ranges_seg, 0); | |
1411 | ||
1412 | /* Base Address Entry. */ | |
7fd3924a | 1413 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1414 | out_byte (0xff); |
7fd3924a | 1415 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1416 | out_byte (0); |
1417 | ||
1418 | /* Range List Entry. */ | |
1419 | for (s = all_segs; s; s = s->next) | |
1420 | { | |
1421 | fragS *frag; | |
1422 | symbolS *beg, *end; | |
1423 | ||
1424 | frag = first_frag_for_seg (s->seg); | |
1425 | beg = symbol_temp_new (s->seg, 0, frag); | |
1426 | s->text_start = beg; | |
1427 | ||
1428 | frag = last_frag_for_seg (s->seg); | |
1429 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
1430 | s->text_end = end; | |
1431 | ||
1432 | expr.X_op = O_symbol; | |
1433 | expr.X_add_symbol = beg; | |
1434 | expr.X_add_number = 0; | |
1435 | emit_expr (&expr, addr_size); | |
1436 | ||
1437 | expr.X_op = O_symbol; | |
1438 | expr.X_add_symbol = end; | |
1439 | expr.X_add_number = 0; | |
1440 | emit_expr (&expr, addr_size); | |
1441 | } | |
1442 | ||
1443 | /* End of Range Entry. */ | |
7fd3924a | 1444 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1445 | out_byte (0); |
7fd3924a | 1446 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1447 | out_byte (0); |
1448 | } | |
1449 | ||
220e750f RH |
1450 | /* Emit data for .debug_aranges. */ |
1451 | ||
58b5739a | 1452 | static void |
a2e22468 | 1453 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1454 | { |
220e750f | 1455 | unsigned int addr_size = sizeof_address; |
220e750f RH |
1456 | struct line_seg *s; |
1457 | expressionS expr; | |
413a266c | 1458 | symbolS *aranges_end; |
220e750f | 1459 | char *p; |
413a266c | 1460 | int sizeof_offset; |
fac0d250 | 1461 | |
413a266c AM |
1462 | sizeof_offset = out_header (aranges_seg, &expr); |
1463 | aranges_end = expr.X_add_symbol; | |
fac0d250 | 1464 | |
220e750f RH |
1465 | /* Version. */ |
1466 | out_two (2); | |
4dc7ead9 | 1467 | |
220e750f | 1468 | /* Offset to .debug_info. */ |
413a266c | 1469 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
220e750f RH |
1470 | |
1471 | /* Size of an address (offset portion). */ | |
1472 | out_byte (addr_size); | |
1473 | ||
1474 | /* Size of a segment descriptor. */ | |
1475 | out_byte (0); | |
1476 | ||
1477 | /* Align the header. */ | |
413a266c | 1478 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1479 | |
ee515fb7 | 1480 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1481 | { |
1482 | fragS *frag; | |
1483 | symbolS *beg, *end; | |
1484 | ||
1485 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1486 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1487 | s->text_start = beg; |
1488 | ||
1489 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 1490 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
1491 | s->text_end = end; |
1492 | ||
1493 | expr.X_op = O_symbol; | |
1494 | expr.X_add_symbol = beg; | |
1495 | expr.X_add_number = 0; | |
1496 | emit_expr (&expr, addr_size); | |
1497 | ||
1498 | expr.X_op = O_subtract; | |
1499 | expr.X_add_symbol = end; | |
1500 | expr.X_op_symbol = beg; | |
1501 | expr.X_add_number = 0; | |
1502 | emit_expr (&expr, addr_size); | |
1503 | } | |
4dc7ead9 | 1504 | |
220e750f RH |
1505 | p = frag_more (2 * addr_size); |
1506 | md_number_to_chars (p, 0, addr_size); | |
1507 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c AM |
1508 | |
1509 | symbol_set_value_now (aranges_end); | |
4dc7ead9 RH |
1510 | } |
1511 | ||
220e750f RH |
1512 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1513 | sync with out_debug_info below. */ | |
fac0d250 | 1514 | |
220e750f | 1515 | static void |
413a266c AM |
1516 | out_debug_abbrev (segT abbrev_seg, |
1517 | segT info_seg ATTRIBUTE_UNUSED, | |
1518 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f RH |
1519 | { |
1520 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1521 | |
220e750f RH |
1522 | out_uleb128 (1); |
1523 | out_uleb128 (DW_TAG_compile_unit); | |
1524 | out_byte (DW_CHILDREN_no); | |
413a266c AM |
1525 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) |
1526 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1527 | else | |
1528 | out_abbrev (DW_AT_stmt_list, DW_FORM_data8); | |
220e750f | 1529 | if (all_segs->next == NULL) |
4dc7ead9 | 1530 | { |
220e750f RH |
1531 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1532 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1533 | } | |
802f5d9e NC |
1534 | else |
1535 | { | |
413a266c | 1536 | if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit) |
802f5d9e NC |
1537 | out_abbrev (DW_AT_ranges, DW_FORM_data4); |
1538 | else | |
1539 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
1540 | } | |
48b91938 | 1541 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1542 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1543 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1544 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1545 | out_abbrev (0, 0); | |
a987bfc9 RH |
1546 | |
1547 | /* Terminate the abbreviations for this compilation unit. */ | |
1548 | out_byte (0); | |
220e750f | 1549 | } |
4dc7ead9 | 1550 | |
220e750f | 1551 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1552 | |
220e750f | 1553 | static void |
802f5d9e | 1554 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) |
220e750f RH |
1555 | { |
1556 | char producer[128]; | |
3d6b762c JM |
1557 | const char *comp_dir; |
1558 | const char *dirname; | |
220e750f | 1559 | expressionS expr; |
220e750f RH |
1560 | symbolS *info_end; |
1561 | char *p; | |
1562 | int len; | |
14e777e0 | 1563 | int sizeof_offset; |
4dc7ead9 | 1564 | |
413a266c AM |
1565 | sizeof_offset = out_header (info_seg, &expr); |
1566 | info_end = expr.X_add_symbol; | |
4dc7ead9 | 1567 | |
220e750f RH |
1568 | /* DWARF version. */ |
1569 | out_two (2); | |
4dc7ead9 | 1570 | |
220e750f | 1571 | /* .debug_abbrev offset */ |
6174d9c8 | 1572 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1573 | |
220e750f RH |
1574 | /* Target address size. */ |
1575 | out_byte (sizeof_address); | |
fac0d250 | 1576 | |
220e750f RH |
1577 | /* DW_TAG_compile_unit DIE abbrev */ |
1578 | out_uleb128 (1); | |
fac0d250 | 1579 | |
220e750f | 1580 | /* DW_AT_stmt_list */ |
413a266c AM |
1581 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
1582 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
1583 | ? 4 : 8)); | |
fac0d250 | 1584 | |
802f5d9e | 1585 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 1586 | if (all_segs->next == NULL) |
58b5739a | 1587 | { |
220e750f RH |
1588 | /* DW_AT_low_pc */ |
1589 | expr.X_op = O_symbol; | |
1590 | expr.X_add_symbol = all_segs->text_start; | |
1591 | expr.X_add_number = 0; | |
1592 | emit_expr (&expr, sizeof_address); | |
1593 | ||
1594 | /* DW_AT_high_pc */ | |
1595 | expr.X_op = O_symbol; | |
1596 | expr.X_add_symbol = all_segs->text_end; | |
1597 | expr.X_add_number = 0; | |
1598 | emit_expr (&expr, sizeof_address); | |
58b5739a | 1599 | } |
802f5d9e NC |
1600 | else |
1601 | { | |
eb1fe072 NC |
1602 | /* This attribute is emitted if the code is disjoint. */ |
1603 | /* DW_AT_ranges. */ | |
1604 | TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset); | |
802f5d9e | 1605 | } |
58b5739a | 1606 | |
48b91938 RH |
1607 | /* DW_AT_name. We don't have the actual file name that was present |
1608 | on the command line, so assume files[1] is the main input file. | |
1609 | We're not supposed to get called unless at least one line number | |
1610 | entry was emitted, so this should always be defined. */ | |
7fd3924a | 1611 | if (files_in_use == 0) |
48b91938 | 1612 | abort (); |
a7ed1ca2 NC |
1613 | if (files[1].dir) |
1614 | { | |
3d6b762c JM |
1615 | dirname = remap_debug_filename (dirs[files[1].dir]); |
1616 | len = strlen (dirname); | |
a7ed1ca2 | 1617 | p = frag_more (len + 1); |
3d6b762c | 1618 | memcpy (p, dirname, len); |
56487c55 | 1619 | INSERT_DIR_SEPARATOR (p, len); |
a7ed1ca2 | 1620 | } |
48b91938 RH |
1621 | len = strlen (files[1].filename) + 1; |
1622 | p = frag_more (len); | |
1623 | memcpy (p, files[1].filename, len); | |
1624 | ||
220e750f | 1625 | /* DW_AT_comp_dir */ |
3d6b762c | 1626 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
1627 | len = strlen (comp_dir) + 1; |
1628 | p = frag_more (len); | |
1629 | memcpy (p, comp_dir, len); | |
fac0d250 | 1630 | |
220e750f RH |
1631 | /* DW_AT_producer */ |
1632 | sprintf (producer, "GNU AS %s", VERSION); | |
1633 | len = strlen (producer) + 1; | |
1634 | p = frag_more (len); | |
1635 | memcpy (p, producer, len); | |
fac0d250 | 1636 | |
220e750f RH |
1637 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1638 | dwarf2 draft has no standard code for assembler. */ | |
1639 | out_two (DW_LANG_Mips_Assembler); | |
1640 | ||
b7d6ed97 | 1641 | symbol_set_value_now (info_end); |
fac0d250 RH |
1642 | } |
1643 | ||
c6cb92c5 NS |
1644 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1645 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
1646 | file has a non-empty .debug_info section. If we emit .debug_line, | |
1647 | and the .debug_info section is empty, we also emit .debug_info, | |
1648 | .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if | |
1649 | there were any .file/.loc directives, or --gdwarf2 was given and | |
1650 | there were any located instructions emitted. */ | |
1651 | ||
fac0d250 | 1652 | void |
a2e22468 | 1653 | dwarf2_finish (void) |
fac0d250 | 1654 | { |
220e750f RH |
1655 | segT line_seg; |
1656 | struct line_seg *s; | |
c6cb92c5 NS |
1657 | segT info_seg; |
1658 | int emit_other_sections = 0; | |
1659 | ||
1660 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1661 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1662 | |
c6cb92c5 NS |
1663 | if (!all_segs && emit_other_sections) |
1664 | /* There is no line information and no non-empty .debug_info | |
1665 | section. */ | |
220e750f | 1666 | return; |
fac0d250 | 1667 | |
220e750f | 1668 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1669 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1670 | |
220e750f RH |
1671 | /* Create and switch to the line number section. */ |
1672 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1673 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1674 | |
220e750f | 1675 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1676 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1677 | { |
220e750f RH |
1678 | struct line_subseg *ss = s->head; |
1679 | struct line_entry **ptail = ss->ptail; | |
1680 | ||
1681 | while ((ss = ss->next) != NULL) | |
1682 | { | |
1683 | *ptail = ss->head; | |
1684 | ptail = ss->ptail; | |
1685 | } | |
fac0d250 | 1686 | } |
85a39694 | 1687 | |
220e750f | 1688 | out_debug_line (line_seg); |
85a39694 | 1689 | |
c6cb92c5 NS |
1690 | /* If this is assembler generated line info, and there is no |
1691 | debug_info already, we need .debug_info and .debug_abbrev | |
1692 | sections as well. */ | |
1693 | if (emit_other_sections) | |
220e750f RH |
1694 | { |
1695 | segT abbrev_seg; | |
220e750f | 1696 | segT aranges_seg; |
802f5d9e | 1697 | segT ranges_seg; |
4dc7ead9 | 1698 | |
c6cb92c5 | 1699 | assert (all_segs); |
7fd3924a | 1700 | |
220e750f RH |
1701 | info_seg = subseg_new (".debug_info", 0); |
1702 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1703 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1704 | |
8a7140c3 NC |
1705 | bfd_set_section_flags (stdoutput, info_seg, |
1706 | SEC_READONLY | SEC_DEBUGGING); | |
1707 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1708 | SEC_READONLY | SEC_DEBUGGING); | |
1709 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1710 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1711 | |
ee515fb7 | 1712 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1713 | |
802f5d9e NC |
1714 | if (all_segs->next == NULL) |
1715 | ranges_seg = NULL; | |
1716 | else | |
1717 | { | |
1718 | ranges_seg = subseg_new (".debug_ranges", 0); | |
7fd3924a | 1719 | bfd_set_section_flags (stdoutput, ranges_seg, |
802f5d9e NC |
1720 | SEC_READONLY | SEC_DEBUGGING); |
1721 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
1722 | out_debug_ranges (ranges_seg); | |
1723 | } | |
1724 | ||
220e750f | 1725 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 1726 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
802f5d9e | 1727 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg); |
220e750f | 1728 | } |
85a39694 | 1729 | } |