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 | ||
01e1a5bc NC |
79 | #ifndef DWARF2_FILE_NAME |
80 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
81 | #endif | |
82 | ||
83 | #ifndef DWARF2_FILE_TIME_NAME | |
84 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) 0 | |
85 | #endif | |
86 | ||
87 | #ifndef DWARF2_FILE_SIZE_NAME | |
88 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) 0 | |
89 | #endif | |
90 | ||
fac0d250 RH |
91 | #include "subsegs.h" |
92 | ||
d9ac5a3b | 93 | #include "elf/dwarf2.h" |
fac0d250 | 94 | |
fac0d250 RH |
95 | /* Since we can't generate the prolog until the body is complete, we |
96 | use three different subsegments for .debug_line: one holding the | |
97 | prolog, one for the directory and filename info, and one for the | |
98 | body ("statement program"). */ | |
99 | #define DL_PROLOG 0 | |
100 | #define DL_FILES 1 | |
101 | #define DL_BODY 2 | |
102 | ||
1737851b BW |
103 | /* If linker relaxation might change offsets in the code, the DWARF special |
104 | opcodes and variable-length operands cannot be used. If this macro is | |
105 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
106 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
107 | # define DWARF2_USE_FIXED_ADVANCE_PC 0 | |
108 | #endif | |
109 | ||
fac0d250 RH |
110 | /* First special line opcde - leave room for the standard opcodes. |
111 | Note: If you want to change this, you'll have to update the | |
112 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
113 | out_debug_line(). */ |
114 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
115 | |
116 | #ifndef DWARF2_LINE_BASE | |
117 | /* Minimum line offset in a special line info. opcode. This value | |
118 | was chosen to give a reasonable range of values. */ | |
119 | # define DWARF2_LINE_BASE -5 | |
120 | #endif | |
121 | ||
122 | /* Range of line offsets in a special line info. opcode. */ | |
123 | #ifndef DWARF2_LINE_RANGE | |
124 | # define DWARF2_LINE_RANGE 14 | |
125 | #endif | |
126 | ||
127 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
128 | /* Define the architecture-dependent minimum instruction length (in | |
129 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 130 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
131 | #endif |
132 | ||
bd0eb99b | 133 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
134 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
135 | ||
cb30237e | 136 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
137 | #define SPECIAL_LINE(op) \ |
138 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
139 | ||
140 | /* Given a special op, return the address skip amount (in units of | |
141 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
142 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
143 | ||
cb30237e | 144 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
145 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
146 | ||
ee515fb7 | 147 | struct line_entry { |
220e750f | 148 | struct line_entry *next; |
07a53e5c | 149 | symbolS *label; |
220e750f | 150 | struct dwarf2_line_info loc; |
e6c774b4 | 151 | }; |
fac0d250 | 152 | |
ee515fb7 | 153 | struct line_subseg { |
220e750f RH |
154 | struct line_subseg *next; |
155 | subsegT subseg; | |
156 | struct line_entry *head; | |
157 | struct line_entry **ptail; | |
158 | }; | |
353e2c69 | 159 | |
ee515fb7 | 160 | struct line_seg { |
220e750f RH |
161 | struct line_seg *next; |
162 | segT seg; | |
163 | struct line_subseg *head; | |
164 | symbolS *text_start; | |
165 | symbolS *text_end; | |
166 | }; | |
167 | ||
168 | /* Collects data for all line table entries during assembly. */ | |
169 | static struct line_seg *all_segs; | |
170 | ||
ee515fb7 | 171 | struct file_entry { |
a7ed1ca2 | 172 | const char *filename; |
220e750f RH |
173 | unsigned int dir; |
174 | }; | |
175 | ||
176 | /* Table of files used by .debug_line. */ | |
177 | static struct file_entry *files; | |
178 | static unsigned int files_in_use; | |
179 | static unsigned int files_allocated; | |
180 | ||
a7ed1ca2 NC |
181 | /* Table of directories used by .debug_line. */ |
182 | static char **dirs; | |
183 | static unsigned int dirs_in_use; | |
184 | static unsigned int dirs_allocated; | |
185 | ||
b34976b6 | 186 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 187 | doing work when there's nothing to do. */ |
1eee4adc | 188 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 189 | |
07a53e5c RH |
190 | /* TRUE when we're supposed to set the basic block mark whenever a |
191 | label is seen. */ | |
192 | bfd_boolean dwarf2_loc_mark_labels; | |
193 | ||
220e750f | 194 | /* Current location as indicated by the most recent .loc directive. */ |
bd0eb99b RH |
195 | static struct dwarf2_line_info current = { |
196 | 1, 1, 0, 0, | |
197 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0 | |
198 | }; | |
220e750f | 199 | |
220e750f RH |
200 | /* The size of an address on the target. */ |
201 | static unsigned int sizeof_address; | |
202 | \f | |
a2e22468 | 203 | static unsigned int get_filenum (const char *, unsigned int); |
413a266c | 204 | |
c5c0a210 | 205 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 206 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 207 | |
6174d9c8 RH |
208 | /* Create an offset to .dwarf2_*. */ |
209 | ||
210 | static void | |
a2e22468 | 211 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 RH |
212 | { |
213 | expressionS expr; | |
214 | ||
215 | expr.X_op = O_symbol; | |
216 | expr.X_add_symbol = symbol; | |
217 | expr.X_add_number = 0; | |
218 | emit_expr (&expr, size); | |
219 | } | |
c5c0a210 | 220 | #endif |
6174d9c8 | 221 | |
220e750f RH |
222 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
223 | ||
224 | static struct line_subseg * | |
a2e22468 | 225 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
226 | { |
227 | static segT last_seg; | |
228 | static subsegT last_subseg; | |
229 | static struct line_subseg *last_line_subseg; | |
230 | ||
001ae1a4 | 231 | struct line_seg **ps, *s; |
220e750f | 232 | struct line_subseg **pss, *ss; |
fac0d250 | 233 | |
220e750f RH |
234 | if (seg == last_seg && subseg == last_subseg) |
235 | return last_line_subseg; | |
236 | ||
001ae1a4 | 237 | for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next) |
220e750f RH |
238 | if (s->seg == seg) |
239 | goto found_seg; | |
240 | ||
241 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
001ae1a4 | 242 | s->next = NULL; |
220e750f RH |
243 | s->seg = seg; |
244 | s->head = NULL; | |
001ae1a4 | 245 | *ps = s; |
220e750f RH |
246 | |
247 | found_seg: | |
248 | for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) | |
fac0d250 | 249 | { |
220e750f | 250 | if (ss->subseg == subseg) |
ee515fb7 | 251 | goto found_subseg; |
220e750f RH |
252 | if (ss->subseg > subseg) |
253 | break; | |
fac0d250 | 254 | } |
220e750f RH |
255 | |
256 | ss = (struct line_subseg *) xmalloc (sizeof (*ss)); | |
257 | ss->next = *pss; | |
258 | ss->subseg = subseg; | |
259 | ss->head = NULL; | |
260 | ss->ptail = &ss->head; | |
261 | *pss = ss; | |
262 | ||
263 | found_subseg: | |
264 | last_seg = seg; | |
265 | last_subseg = subseg; | |
266 | last_line_subseg = ss; | |
267 | ||
268 | return ss; | |
fac0d250 RH |
269 | } |
270 | ||
07a53e5c RH |
271 | /* Record an entry for LOC occurring at LABEL. */ |
272 | ||
273 | static void | |
274 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) | |
275 | { | |
276 | struct line_subseg *ss; | |
277 | struct line_entry *e; | |
278 | ||
279 | e = (struct line_entry *) xmalloc (sizeof (*e)); | |
280 | e->next = NULL; | |
281 | e->label = label; | |
282 | e->loc = *loc; | |
283 | ||
284 | ss = get_line_subseg (now_seg, now_subseg); | |
285 | *ss->ptail = e; | |
286 | ss->ptail = &e->next; | |
287 | } | |
288 | ||
436d9e46 | 289 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 290 | |
220e750f | 291 | void |
a2e22468 | 292 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 293 | { |
1ea5c325 MS |
294 | static unsigned int line = -1; |
295 | static unsigned int filenum = -1; | |
220e750f | 296 | |
07a53e5c RH |
297 | symbolS *sym; |
298 | ||
220e750f RH |
299 | /* Early out for as-yet incomplete location information. */ |
300 | if (loc->filenum == 0 || loc->line == 0) | |
301 | return; | |
302 | ||
ffa554ed GK |
303 | /* Don't emit sequences of line symbols for the same line when the |
304 | symbols apply to assembler code. It is necessary to emit | |
305 | duplicate line symbols when a compiler asks for them, because GDB | |
306 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 307 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 308 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
309 | return; |
310 | ||
311 | line = loc->line; | |
312 | filenum = loc->filenum; | |
313 | ||
07a53e5c RH |
314 | sym = symbol_temp_new (now_seg, ofs, frag_now); |
315 | dwarf2_gen_line_info_1 (sym, loc); | |
220e750f | 316 | } |
fac0d250 | 317 | |
ecea7679 RH |
318 | /* Returns the current source information. If .file directives have |
319 | been encountered, the info for the corresponding source file is | |
320 | returned. Otherwise, the info for the assembly source file is | |
321 | returned. */ | |
322 | ||
220e750f | 323 | void |
a2e22468 | 324 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
325 | { |
326 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 327 | { |
220e750f RH |
328 | char *filename; |
329 | as_where (&filename, &line->line); | |
a7ed1ca2 | 330 | line->filenum = get_filenum (filename, 0); |
220e750f | 331 | line->column = 0; |
bd0eb99b | 332 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 333 | line->isa = current.isa; |
fac0d250 | 334 | } |
220e750f RH |
335 | else |
336 | *line = current; | |
fac0d250 RH |
337 | } |
338 | ||
7fd3924a | 339 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
340 | machine of isa changes when assembler debug info is enabled. */ |
341 | ||
342 | void | |
343 | dwarf2_set_isa (unsigned int isa) | |
344 | { | |
345 | current.isa = isa; | |
346 | } | |
347 | ||
220e750f RH |
348 | /* Called for each machine instruction, or relatively atomic group of |
349 | machine instructions (ie built-in macro). The instruction or group | |
350 | is SIZE bytes in length. If dwarf2 line number generation is called | |
351 | for, emit a line statement appropriately. */ | |
353e2c69 | 352 | |
220e750f | 353 | void |
a2e22468 | 354 | dwarf2_emit_insn (int size) |
fac0d250 | 355 | { |
220e750f | 356 | struct dwarf2_line_info loc; |
fac0d250 | 357 | |
7fd3924a | 358 | if (!dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2) |
220e750f | 359 | return; |
7fd3924a AM |
360 | |
361 | dwarf2_where (&loc); | |
b6675117 | 362 | |
220e750f | 363 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
661ba50f BW |
364 | dwarf2_consume_line_info (); |
365 | } | |
366 | ||
367 | /* Called after the current line information has been either used with | |
368 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
369 | This resets the state of the line number information to reflect that | |
370 | it has been used. */ | |
371 | ||
372 | void | |
373 | dwarf2_consume_line_info (void) | |
374 | { | |
375 | /* Unless we generate DWARF2 debugging information for each | |
376 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 377 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
378 | |
379 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
380 | | DWARF2_FLAG_PROLOGUE_END | |
381 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
220e750f | 382 | } |
fac0d250 | 383 | |
07a53e5c RH |
384 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
385 | is enabled, emit a basic block marker. */ | |
386 | ||
387 | void | |
388 | dwarf2_emit_label (symbolS *label) | |
389 | { | |
390 | struct dwarf2_line_info loc; | |
391 | ||
392 | if (!dwarf2_loc_mark_labels) | |
393 | return; | |
394 | if (S_GET_SEGMENT (label) != now_seg) | |
395 | return; | |
396 | if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)) | |
397 | return; | |
7fd3924a AM |
398 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
399 | return; | |
400 | ||
401 | dwarf2_where (&loc); | |
07a53e5c RH |
402 | |
403 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
404 | ||
07a53e5c | 405 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 406 | dwarf2_consume_line_info (); |
07a53e5c RH |
407 | } |
408 | ||
a7ed1ca2 NC |
409 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
410 | allocate it on that file table slot, otherwise return the first | |
411 | empty one. */ | |
220e750f RH |
412 | |
413 | static unsigned int | |
a2e22468 | 414 | get_filenum (const char *filename, unsigned int num) |
220e750f | 415 | { |
a7ed1ca2 NC |
416 | static unsigned int last_used, last_used_dir_len; |
417 | const char *file; | |
418 | size_t dir_len; | |
419 | unsigned int i, dir; | |
220e750f | 420 | |
a7ed1ca2 NC |
421 | if (num == 0 && last_used) |
422 | { | |
423 | if (! files[last_used].dir | |
424 | && strcmp (filename, files[last_used].filename) == 0) | |
425 | return last_used; | |
426 | if (files[last_used].dir | |
427 | && strncmp (filename, dirs[files[last_used].dir], | |
428 | last_used_dir_len) == 0 | |
429 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
430 | && strcmp (filename + last_used_dir_len + 1, | |
431 | files[last_used].filename) == 0) | |
432 | return last_used; | |
433 | } | |
220e750f | 434 | |
a7ed1ca2 NC |
435 | file = lbasename (filename); |
436 | /* Don't make empty string from / or A: from A:/ . */ | |
437 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
438 | if (file <= filename + 3) | |
439 | file = filename; | |
440 | #else | |
441 | if (file == filename + 1) | |
442 | file = filename; | |
443 | #endif | |
444 | dir_len = file - filename; | |
445 | ||
446 | dir = 0; | |
447 | if (dir_len) | |
448 | { | |
01e1a5bc | 449 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR |
a7ed1ca2 | 450 | --dir_len; |
01e1a5bc | 451 | #endif |
a7ed1ca2 | 452 | for (dir = 1; dir < dirs_in_use; ++dir) |
4dde8e61 | 453 | if (strncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
454 | && dirs[dir][dir_len] == '\0') |
455 | break; | |
456 | ||
457 | if (dir >= dirs_in_use) | |
458 | { | |
459 | if (dir >= dirs_allocated) | |
460 | { | |
461 | dirs_allocated = dir + 32; | |
462 | dirs = (char **) | |
463 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
464 | } | |
465 | ||
466 | dirs[dir] = xmalloc (dir_len + 1); | |
467 | memcpy (dirs[dir], filename, dir_len); | |
468 | dirs[dir][dir_len] = '\0'; | |
469 | dirs_in_use = dir + 1; | |
470 | } | |
471 | } | |
472 | ||
473 | if (num == 0) | |
474 | { | |
475 | for (i = 1; i < files_in_use; ++i) | |
476 | if (files[i].dir == dir | |
88b4ca40 | 477 | && files[i].filename |
a7ed1ca2 NC |
478 | && strcmp (file, files[i].filename) == 0) |
479 | { | |
480 | last_used = i; | |
481 | last_used_dir_len = dir_len; | |
482 | return i; | |
483 | } | |
484 | } | |
485 | else | |
486 | i = num; | |
220e750f RH |
487 | |
488 | if (i >= files_allocated) | |
fac0d250 | 489 | { |
249e3833 RH |
490 | unsigned int old = files_allocated; |
491 | ||
220e750f RH |
492 | files_allocated = i + 32; |
493 | files = (struct file_entry *) | |
ee515fb7 | 494 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
495 | |
496 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
497 | } |
498 | ||
a7ed1ca2 NC |
499 | files[i].filename = num ? file : xstrdup (file); |
500 | files[i].dir = dir; | |
10cd14b4 AM |
501 | if (files_in_use < i + 1) |
502 | files_in_use = i + 1; | |
220e750f | 503 | last_used = i; |
a7ed1ca2 | 504 | last_used_dir_len = dir_len; |
220e750f RH |
505 | |
506 | return i; | |
507 | } | |
fac0d250 | 508 | |
ecb4347a DJ |
509 | /* Handle two forms of .file directive: |
510 | - Pass .file "source.c" to s_app_file | |
511 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 512 | |
ecb4347a DJ |
513 | If an entry is added to the file table, return a pointer to the filename. */ |
514 | ||
515 | char * | |
a2e22468 | 516 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
517 | { |
518 | offsetT num; | |
e46d99eb | 519 | char *filename; |
220e750f RH |
520 | int filename_len; |
521 | ||
522 | /* Continue to accept a bare string and pass it off. */ | |
523 | SKIP_WHITESPACE (); | |
524 | if (*input_line_pointer == '"') | |
fac0d250 | 525 | { |
220e750f | 526 | s_app_file (0); |
ecb4347a | 527 | return NULL; |
fac0d250 RH |
528 | } |
529 | ||
220e750f RH |
530 | num = get_absolute_expression (); |
531 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
532 | if (filename == NULL) |
533 | return NULL; | |
220e750f RH |
534 | demand_empty_rest_of_line (); |
535 | ||
249e3833 | 536 | if (num < 1) |
fac0d250 | 537 | { |
0e389e77 | 538 | as_bad (_("file number less than one")); |
ecb4347a | 539 | return NULL; |
fac0d250 RH |
540 | } |
541 | ||
7cadeb2c AM |
542 | /* A .file directive implies compiler generated debug information is |
543 | being supplied. Turn off gas generated debug info. */ | |
544 | debug_type = DEBUG_NONE; | |
545 | ||
0e1a166b | 546 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 547 | { |
0e389e77 | 548 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 549 | return NULL; |
249e3833 | 550 | } |
220e750f | 551 | |
a7ed1ca2 | 552 | get_filenum (filename, num); |
ecb4347a DJ |
553 | |
554 | return filename; | |
fac0d250 RH |
555 | } |
556 | ||
220e750f | 557 | void |
a2e22468 | 558 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 559 | { |
ecea7679 RH |
560 | offsetT filenum, line; |
561 | ||
851feff8 DJ |
562 | /* If we see two .loc directives in a row, force the first one to be |
563 | output now. */ | |
7cadeb2c | 564 | if (dwarf2_loc_directive_seen) |
851feff8 DJ |
565 | dwarf2_emit_insn (0); |
566 | ||
ecea7679 RH |
567 | filenum = get_absolute_expression (); |
568 | SKIP_WHITESPACE (); | |
569 | line = get_absolute_expression (); | |
570 | ||
571 | if (filenum < 1) | |
572 | { | |
573 | as_bad (_("file number less than one")); | |
574 | return; | |
575 | } | |
576 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
577 | { | |
578 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
579 | return; | |
580 | } | |
581 | ||
582 | current.filenum = filenum; | |
583 | current.line = line; | |
584 | ||
585 | #ifndef NO_LISTING | |
586 | if (listing) | |
587 | { | |
588 | if (files[filenum].dir) | |
589 | { | |
590 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
591 | size_t file_len = strlen (files[filenum].filename); | |
592 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
593 | ||
594 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 595 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
596 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
597 | cp[dir_len + file_len + 1] = '\0'; | |
598 | listing_source_file (cp); | |
599 | } | |
600 | else | |
601 | listing_source_file (files[filenum].filename); | |
602 | listing_source_line (line); | |
603 | } | |
604 | #endif | |
605 | ||
220e750f | 606 | SKIP_WHITESPACE (); |
ecea7679 RH |
607 | if (ISDIGIT (*input_line_pointer)) |
608 | { | |
609 | current.column = get_absolute_expression (); | |
610 | SKIP_WHITESPACE (); | |
611 | } | |
612 | ||
613 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 614 | { |
bd0eb99b RH |
615 | char *p, c; |
616 | offsetT value; | |
617 | ||
618 | p = input_line_pointer; | |
619 | c = get_symbol_end (); | |
620 | ||
621 | if (strcmp (p, "basic_block") == 0) | |
622 | { | |
623 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
624 | *input_line_pointer = c; | |
625 | } | |
626 | else if (strcmp (p, "prologue_end") == 0) | |
627 | { | |
628 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
629 | *input_line_pointer = c; | |
630 | } | |
631 | else if (strcmp (p, "epilogue_begin") == 0) | |
632 | { | |
633 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
634 | *input_line_pointer = c; | |
635 | } | |
636 | else if (strcmp (p, "is_stmt") == 0) | |
637 | { | |
638 | *input_line_pointer = c; | |
639 | value = get_absolute_expression (); | |
640 | if (value == 0) | |
641 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
642 | else if (value == 1) | |
643 | current.flags |= DWARF2_FLAG_IS_STMT; | |
644 | else | |
ecea7679 RH |
645 | { |
646 | as_bad (_("is_stmt value not 0 or 1")); | |
647 | return; | |
648 | } | |
bd0eb99b RH |
649 | } |
650 | else if (strcmp (p, "isa") == 0) | |
651 | { | |
7fd3924a | 652 | *input_line_pointer = c; |
bd0eb99b | 653 | value = get_absolute_expression (); |
ecea7679 | 654 | if (value >= 0) |
bd0eb99b | 655 | current.isa = value; |
ecea7679 RH |
656 | else |
657 | { | |
658 | as_bad (_("isa number less than zero")); | |
659 | return; | |
660 | } | |
bd0eb99b RH |
661 | } |
662 | else | |
663 | { | |
ecea7679 | 664 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
7fd3924a | 665 | *input_line_pointer = c; |
bd0eb99b RH |
666 | return; |
667 | } | |
668 | ||
ecea7679 | 669 | SKIP_WHITESPACE (); |
bd0eb99b RH |
670 | } |
671 | ||
672 | demand_empty_rest_of_line (); | |
1eee4adc | 673 | dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 674 | debug_type = DEBUG_NONE; |
220e750f | 675 | } |
07a53e5c RH |
676 | |
677 | void | |
678 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
679 | { | |
680 | offsetT value = get_absolute_expression (); | |
681 | ||
682 | if (value != 0 && value != 1) | |
683 | { | |
684 | as_bad (_("expected 0 or 1")); | |
685 | ignore_rest_of_line (); | |
686 | } | |
687 | else | |
688 | { | |
689 | dwarf2_loc_mark_labels = value != 0; | |
690 | demand_empty_rest_of_line (); | |
691 | } | |
692 | } | |
220e750f RH |
693 | \f |
694 | static struct frag * | |
a2e22468 | 695 | first_frag_for_seg (segT seg) |
220e750f | 696 | { |
c9049d30 | 697 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
698 | } |
699 | ||
700 | static struct frag * | |
a2e22468 | 701 | last_frag_for_seg (segT seg) |
220e750f | 702 | { |
c9049d30 | 703 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 704 | |
c9049d30 AM |
705 | while (f->frch_next != NULL) |
706 | f = f->frch_next; | |
220e750f | 707 | |
c9049d30 | 708 | return f->frch_last; |
220e750f RH |
709 | } |
710 | \f | |
711 | /* Emit a single byte into the current segment. */ | |
712 | ||
713 | static inline void | |
a2e22468 | 714 | out_byte (int byte) |
220e750f RH |
715 | { |
716 | FRAG_APPEND_1_CHAR (byte); | |
717 | } | |
718 | ||
719 | /* Emit a statement program opcode into the current segment. */ | |
720 | ||
721 | static inline void | |
a2e22468 | 722 | out_opcode (int opc) |
220e750f RH |
723 | { |
724 | out_byte (opc); | |
725 | } | |
726 | ||
727 | /* Emit a two-byte word into the current segment. */ | |
728 | ||
729 | static inline void | |
a2e22468 | 730 | out_two (int data) |
220e750f RH |
731 | { |
732 | md_number_to_chars (frag_more (2), data, 2); | |
733 | } | |
734 | ||
735 | /* Emit a four byte word into the current segment. */ | |
736 | ||
737 | static inline void | |
a2e22468 | 738 | out_four (int data) |
220e750f RH |
739 | { |
740 | md_number_to_chars (frag_more (4), data, 4); | |
741 | } | |
742 | ||
743 | /* Emit an unsigned "little-endian base 128" number. */ | |
744 | ||
fac0d250 | 745 | static void |
a2e22468 | 746 | out_uleb128 (addressT value) |
220e750f RH |
747 | { |
748 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
749 | } | |
750 | ||
751 | /* Emit a tuple for .debug_abbrev. */ | |
752 | ||
753 | static inline void | |
a2e22468 | 754 | out_abbrev (int name, int form) |
fac0d250 | 755 | { |
220e750f RH |
756 | out_uleb128 (name); |
757 | out_uleb128 (form); | |
758 | } | |
fac0d250 | 759 | |
220e750f | 760 | /* Get the size of a fragment. */ |
fac0d250 | 761 | |
220e750f | 762 | static offsetT |
c9049d30 | 763 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
764 | { |
765 | frchainS *fr; | |
766 | ||
767 | if (frag->fr_next) | |
768 | return frag->fr_fix; | |
769 | ||
770 | /* If a fragment is the last in the chain, special measures must be | |
771 | taken to find its size before relaxation, since it may be pending | |
772 | on some subsegment chain. */ | |
c9049d30 | 773 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 774 | if (fr->frch_last == frag) |
c5c0a210 | 775 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
776 | |
777 | abort (); | |
778 | } | |
fac0d250 | 779 | |
220e750f | 780 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 781 | |
220e750f | 782 | static void |
07a53e5c | 783 | out_set_addr (symbolS *sym) |
220e750f RH |
784 | { |
785 | expressionS expr; | |
9e3af0e7 | 786 | |
fac0d250 | 787 | out_opcode (DW_LNS_extended_op); |
220e750f | 788 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
789 | |
790 | out_opcode (DW_LNE_set_address); | |
791 | expr.X_op = O_symbol; | |
792 | expr.X_add_symbol = sym; | |
793 | expr.X_add_number = 0; | |
220e750f | 794 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
795 | } |
796 | ||
a3b75434 | 797 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 798 | static void scale_addr_delta (addressT *); |
c8970b4b | 799 | |
a3b75434 | 800 | static void |
d7342424 | 801 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
802 | { |
803 | static int printed_this = 0; | |
804 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
805 | { | |
806 | if (!printed_this) | |
807 | as_bad("unaligned opcodes detected in executable segment"); | |
808 | printed_this = 1; | |
809 | } | |
810 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
811 | } | |
812 | #else | |
813 | #define scale_addr_delta(A) | |
814 | #endif | |
815 | ||
220e750f RH |
816 | /* Encode a pair of line and address skips as efficiently as possible. |
817 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 818 | |
220e750f RH |
819 | The following two routines *must* be kept in sync. This is |
820 | enforced by making emit_inc_line_addr abort if we do not emit | |
821 | exactly the expected number of bytes. */ | |
822 | ||
823 | static int | |
a2e22468 | 824 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 825 | { |
220e750f RH |
826 | unsigned int tmp, opcode; |
827 | int len = 0; | |
fac0d250 | 828 | |
220e750f | 829 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 830 | scale_addr_delta (&addr_delta); |
220e750f RH |
831 | |
832 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
833 | We cannot use special opcodes here, since we want the end_sequence | |
834 | to emit the matrix entry. */ | |
835 | if (line_delta == INT_MAX) | |
fac0d250 | 836 | { |
220e750f RH |
837 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
838 | len = 1; | |
fac0d250 | 839 | else |
220e750f RH |
840 | len = 1 + sizeof_leb128 (addr_delta, 0); |
841 | return len + 3; | |
fac0d250 | 842 | } |
fac0d250 | 843 | |
220e750f RH |
844 | /* Bias the line delta by the base. */ |
845 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 846 | |
220e750f RH |
847 | /* If the line increment is out of range of a special opcode, we |
848 | must encode it with DW_LNS_advance_line. */ | |
849 | if (tmp >= DWARF2_LINE_RANGE) | |
850 | { | |
851 | len = 1 + sizeof_leb128 (line_delta, 1); | |
852 | line_delta = 0; | |
853 | tmp = 0 - DWARF2_LINE_BASE; | |
854 | } | |
fac0d250 | 855 | |
220e750f RH |
856 | /* Bias the opcode by the special opcode base. */ |
857 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 858 | |
220e750f RH |
859 | /* Avoid overflow when addr_delta is large. */ |
860 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
861 | { | |
862 | /* Try using a special opcode. */ | |
863 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
864 | if (opcode <= 255) | |
865 | return len + 1; | |
866 | ||
867 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
868 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
869 | if (opcode <= 255) | |
870 | return len + 2; | |
871 | } | |
872 | ||
873 | /* Otherwise use DW_LNS_advance_pc. */ | |
874 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
875 | ||
876 | /* DW_LNS_copy or special opcode. */ | |
877 | len += 1; | |
878 | ||
879 | return len; | |
880 | } | |
fac0d250 | 881 | |
220e750f | 882 | static void |
a2e22468 | 883 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
884 | { |
885 | unsigned int tmp, opcode; | |
886 | int need_copy = 0; | |
887 | char *end = p + len; | |
fac0d250 | 888 | |
07a53e5c RH |
889 | /* Line number sequences cannot go backward in addresses. This means |
890 | we've incorrectly ordered the statements in the sequence. */ | |
891 | assert ((offsetT) addr_delta >= 0); | |
892 | ||
220e750f | 893 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
894 | scale_addr_delta (&addr_delta); |
895 | ||
220e750f RH |
896 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
897 | We cannot use special opcodes here, since we want the end_sequence | |
898 | to emit the matrix entry. */ | |
899 | if (line_delta == INT_MAX) | |
fac0d250 | 900 | { |
220e750f RH |
901 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
902 | *p++ = DW_LNS_const_add_pc; | |
903 | else | |
fac0d250 | 904 | { |
220e750f RH |
905 | *p++ = DW_LNS_advance_pc; |
906 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 907 | } |
220e750f RH |
908 | |
909 | *p++ = DW_LNS_extended_op; | |
910 | *p++ = 1; | |
911 | *p++ = DW_LNE_end_sequence; | |
912 | goto done; | |
fac0d250 RH |
913 | } |
914 | ||
220e750f RH |
915 | /* Bias the line delta by the base. */ |
916 | tmp = line_delta - DWARF2_LINE_BASE; | |
917 | ||
918 | /* If the line increment is out of range of a special opcode, we | |
919 | must encode it with DW_LNS_advance_line. */ | |
920 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 921 | { |
220e750f RH |
922 | *p++ = DW_LNS_advance_line; |
923 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 924 | |
220e750f RH |
925 | line_delta = 0; |
926 | tmp = 0 - DWARF2_LINE_BASE; | |
927 | need_copy = 1; | |
928 | } | |
fac0d250 | 929 | |
bd0eb99b RH |
930 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
931 | special opcode. */ | |
932 | if (line_delta == 0 && addr_delta == 0) | |
933 | { | |
934 | *p++ = DW_LNS_copy; | |
935 | goto done; | |
936 | } | |
937 | ||
220e750f RH |
938 | /* Bias the opcode by the special opcode base. */ |
939 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 940 | |
220e750f RH |
941 | /* Avoid overflow when addr_delta is large. */ |
942 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 943 | { |
220e750f RH |
944 | /* Try using a special opcode. */ |
945 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
946 | if (opcode <= 255) | |
947 | { | |
948 | *p++ = opcode; | |
949 | goto done; | |
950 | } | |
951 | ||
952 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
953 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
954 | if (opcode <= 255) | |
fac0d250 | 955 | { |
220e750f RH |
956 | *p++ = DW_LNS_const_add_pc; |
957 | *p++ = opcode; | |
958 | goto done; | |
fac0d250 RH |
959 | } |
960 | } | |
220e750f RH |
961 | |
962 | /* Otherwise use DW_LNS_advance_pc. */ | |
963 | *p++ = DW_LNS_advance_pc; | |
964 | p += output_leb128 (p, addr_delta, 0); | |
965 | ||
966 | if (need_copy) | |
967 | *p++ = DW_LNS_copy; | |
fac0d250 | 968 | else |
220e750f | 969 | *p++ = tmp; |
fac0d250 | 970 | |
220e750f RH |
971 | done: |
972 | assert (p == end); | |
973 | } | |
a8316fe2 | 974 | |
220e750f | 975 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 976 | |
220e750f | 977 | static void |
a2e22468 | 978 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
979 | { |
980 | int len = size_inc_line_addr (line_delta, addr_delta); | |
981 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
982 | } | |
9de8d8f1 | 983 | |
1737851b BW |
984 | /* Write out an alternative form of line and address skips using |
985 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
986 | line and address information, but it is required if linker relaxation |
987 | could change the code offsets. The following two routines *must* be | |
988 | kept in sync. */ | |
1737851b | 989 | |
7ddd14de BW |
990 | static int |
991 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 992 | { |
7ddd14de | 993 | int len = 0; |
1737851b BW |
994 | |
995 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
996 | if (line_delta != INT_MAX) |
997 | len = 1 + sizeof_leb128 (line_delta, 1); | |
998 | ||
999 | if (addr_delta > 50000) | |
1000 | { | |
1001 | /* DW_LNS_extended_op */ | |
1002 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1003 | /* DW_LNE_set_address */ | |
1004 | len += 1 + sizeof_address; | |
1005 | } | |
1006 | else | |
1007 | /* DW_LNS_fixed_advance_pc */ | |
1008 | len += 3; | |
1009 | ||
1737851b | 1010 | if (line_delta == INT_MAX) |
7ddd14de BW |
1011 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1012 | len += 3; | |
1013 | else | |
1014 | /* DW_LNS_copy */ | |
1015 | len += 1; | |
1016 | ||
1017 | return len; | |
1018 | } | |
1019 | ||
1020 | static void | |
1021 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1022 | char *p, int len) | |
1023 | { | |
1024 | expressionS *exp; | |
1025 | segT line_seg; | |
1026 | char *end = p + len; | |
1027 | ||
1028 | /* Line number sequences cannot go backward in addresses. This means | |
1029 | we've incorrectly ordered the statements in the sequence. */ | |
1030 | assert ((offsetT) addr_delta >= 0); | |
1031 | ||
1032 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
1033 | if (line_delta != INT_MAX) | |
1034 | { | |
1035 | *p++ = DW_LNS_advance_line; | |
1036 | p += output_leb128 (p, line_delta, 1); | |
1037 | } | |
1038 | ||
1039 | exp = symbol_get_value_expression (frag->fr_symbol); | |
1040 | line_seg = subseg_get (".debug_line", 0); | |
1041 | ||
1042 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1043 | advance the address by at most 64K. Linker relaxation (without | |
1044 | which this function would not be used) could change the operand by | |
1045 | an unknown amount. If the address increment is getting close to | |
1046 | the limit, just reset the address. */ | |
1047 | if (addr_delta > 50000) | |
1737851b | 1048 | { |
7ddd14de BW |
1049 | symbolS *to_sym; |
1050 | expressionS expr; | |
1051 | ||
1052 | assert (exp->X_op = O_subtract); | |
1053 | to_sym = exp->X_add_symbol; | |
1054 | ||
1055 | *p++ = DW_LNS_extended_op; | |
1056 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1057 | *p++ = DW_LNE_set_address; | |
1058 | expr.X_op = O_symbol; | |
1737851b | 1059 | expr.X_add_symbol = to_sym; |
1737851b | 1060 | expr.X_add_number = 0; |
7ddd14de BW |
1061 | subseg_change (line_seg, 0); |
1062 | emit_expr_fix (&expr, sizeof_address, frag, p); | |
1063 | p += sizeof_address; | |
1064 | } | |
1065 | else | |
1066 | { | |
1067 | *p++ = DW_LNS_fixed_advance_pc; | |
1068 | subseg_change (line_seg, 0); | |
1069 | emit_expr_fix (exp, 2, frag, p); | |
1070 | p += 2; | |
1737851b BW |
1071 | } |
1072 | ||
7ddd14de BW |
1073 | if (line_delta == INT_MAX) |
1074 | { | |
1075 | *p++ = DW_LNS_extended_op; | |
1076 | *p++ = 1; | |
1077 | *p++ = DW_LNE_end_sequence; | |
1078 | } | |
1079 | else | |
1080 | *p++ = DW_LNS_copy; | |
1737851b | 1081 | |
7ddd14de | 1082 | assert (p == end); |
1737851b BW |
1083 | } |
1084 | ||
220e750f RH |
1085 | /* Generate a variant frag that we can use to relax address/line |
1086 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1087 | |
220e750f | 1088 | static void |
07a53e5c | 1089 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1090 | { |
220e750f RH |
1091 | expressionS expr; |
1092 | int max_chars; | |
6576f0b5 | 1093 | |
220e750f RH |
1094 | expr.X_op = O_subtract; |
1095 | expr.X_add_symbol = to_sym; | |
1096 | expr.X_op_symbol = from_sym; | |
1097 | expr.X_add_number = 0; | |
fac0d250 | 1098 | |
220e750f RH |
1099 | /* The maximum size of the frag is the line delta with a maximum |
1100 | sized address delta. */ | |
7ddd14de BW |
1101 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1102 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1103 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1104 | else | |
1105 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1106 | |
220e750f RH |
1107 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
1108 | make_expr_symbol (&expr), line_delta, NULL); | |
1109 | } | |
fac0d250 | 1110 | |
220e750f RH |
1111 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1112 | based on the current values of the symbols. It is called before | |
1113 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1114 | |
220e750f | 1115 | int |
a2e22468 | 1116 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1117 | { |
1118 | offsetT addr_delta; | |
1119 | int size; | |
fac0d250 | 1120 | |
6386f3a7 | 1121 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1122 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1123 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1124 | else | |
1125 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1126 | |
220e750f | 1127 | frag->fr_subtype = size; |
fac0d250 | 1128 | |
220e750f RH |
1129 | return size; |
1130 | } | |
1131 | ||
1132 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1133 | current values of the symbols. fr_subtype is the current length | |
1134 | of the frag. This returns the change in frag length. */ | |
1135 | ||
1136 | int | |
a2e22468 | 1137 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1138 | { |
1139 | int old_size, new_size; | |
fac0d250 | 1140 | |
220e750f RH |
1141 | old_size = frag->fr_subtype; |
1142 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1143 | |
220e750f | 1144 | return new_size - old_size; |
fac0d250 RH |
1145 | } |
1146 | ||
220e750f RH |
1147 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1148 | fill frag. This is called after all relaxation has been done. | |
1149 | fr_subtype will be the desired length of the frag. */ | |
1150 | ||
1151 | void | |
a2e22468 | 1152 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1153 | { |
220e750f RH |
1154 | offsetT addr_diff; |
1155 | ||
6386f3a7 | 1156 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 1157 | |
220e750f RH |
1158 | /* fr_var carries the max_chars that we created the fragment with. |
1159 | fr_subtype carries the current expected length. We must, of | |
1160 | course, have allocated enough memory earlier. */ | |
bccba5f0 | 1161 | assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1162 | |
7ddd14de BW |
1163 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1164 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1165 | frag->fr_literal + frag->fr_fix, | |
1166 | frag->fr_subtype); | |
1167 | else | |
1168 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1169 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1170 | |
1171 | frag->fr_fix += frag->fr_subtype; | |
1172 | frag->fr_type = rs_fill; | |
1173 | frag->fr_var = 0; | |
1174 | frag->fr_offset = 0; | |
1175 | } | |
1176 | ||
1177 | /* Generate .debug_line content for the chain of line number entries | |
1178 | beginning at E, for segment SEG. */ | |
1179 | ||
1180 | static void | |
a2e22468 | 1181 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1182 | { |
1183 | unsigned filenum = 1; | |
1184 | unsigned line = 1; | |
1185 | unsigned column = 0; | |
bd0eb99b RH |
1186 | unsigned isa = 0; |
1187 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1188 | fragS *last_frag = NULL, *frag; |
1189 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1190 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1191 | struct line_entry *next; |
1192 | ||
fead5cd9 | 1193 | do |
fac0d250 | 1194 | { |
07a53e5c | 1195 | int line_delta; |
220e750f RH |
1196 | |
1197 | if (filenum != e->loc.filenum) | |
fac0d250 | 1198 | { |
220e750f RH |
1199 | filenum = e->loc.filenum; |
1200 | out_opcode (DW_LNS_set_file); | |
1201 | out_uleb128 (filenum); | |
220e750f RH |
1202 | } |
1203 | ||
1204 | if (column != e->loc.column) | |
1205 | { | |
1206 | column = e->loc.column; | |
1207 | out_opcode (DW_LNS_set_column); | |
1208 | out_uleb128 (column); | |
220e750f RH |
1209 | } |
1210 | ||
bd0eb99b RH |
1211 | if (isa != e->loc.isa) |
1212 | { | |
1213 | isa = e->loc.isa; | |
1214 | out_opcode (DW_LNS_set_isa); | |
1215 | out_uleb128 (isa); | |
bd0eb99b RH |
1216 | } |
1217 | ||
1218 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1219 | { |
1220 | flags = e->loc.flags; | |
1221 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1222 | } |
1223 | ||
bd0eb99b | 1224 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1225 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1226 | |
bd0eb99b | 1227 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1228 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1229 | |
1230 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1231 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1232 | |
fb81275c JM |
1233 | /* Don't try to optimize away redundant entries; gdb wants two |
1234 | entries for a function where the code starts on the same line as | |
1235 | the {, and there's no way to identify that case here. Trust gcc | |
1236 | to optimize appropriately. */ | |
07a53e5c RH |
1237 | line_delta = e->loc.line - line; |
1238 | lab = e->label; | |
1239 | frag = symbol_get_frag (lab); | |
1240 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1241 | |
07a53e5c | 1242 | if (last_frag == NULL) |
220e750f | 1243 | { |
07a53e5c RH |
1244 | out_set_addr (lab); |
1245 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1246 | } |
7ddd14de | 1247 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1248 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1249 | else | |
1250 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1251 | ||
1252 | line = e->loc.line; | |
1253 | last_lab = lab; | |
1254 | last_frag = frag; | |
1255 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1256 | |
1257 | next = e->next; | |
1258 | free (e); | |
1259 | e = next; | |
fac0d250 | 1260 | } |
fead5cd9 | 1261 | while (e); |
353e2c69 | 1262 | |
220e750f | 1263 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1264 | frag = last_frag_for_seg (seg); |
c9049d30 | 1265 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1266 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1267 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1268 | else |
07a53e5c RH |
1269 | { |
1270 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1271 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1272 | } | |
fac0d250 RH |
1273 | } |
1274 | ||
220e750f RH |
1275 | /* Emit the directory and file tables for .debug_line. */ |
1276 | ||
fac0d250 | 1277 | static void |
a2e22468 | 1278 | out_file_list (void) |
fac0d250 RH |
1279 | { |
1280 | size_t size; | |
3d6b762c | 1281 | const char *dir; |
fac0d250 | 1282 | char *cp; |
220e750f RH |
1283 | unsigned int i; |
1284 | ||
a7ed1ca2 NC |
1285 | /* Emit directory list. */ |
1286 | for (i = 1; i < dirs_in_use; ++i) | |
1287 | { | |
3d6b762c JM |
1288 | dir = remap_debug_filename (dirs[i]); |
1289 | size = strlen (dir) + 1; | |
a7ed1ca2 | 1290 | cp = frag_more (size); |
3d6b762c | 1291 | memcpy (cp, dir, size); |
a7ed1ca2 NC |
1292 | } |
1293 | /* Terminate it. */ | |
220e750f | 1294 | out_byte ('\0'); |
fac0d250 | 1295 | |
220e750f | 1296 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1297 | { |
01e1a5bc NC |
1298 | const char *fullfilename; |
1299 | ||
249e3833 RH |
1300 | if (files[i].filename == NULL) |
1301 | { | |
0e389e77 | 1302 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1303 | /* Prevent a crash later, particularly for file 1. */ |
1304 | files[i].filename = ""; | |
249e3833 RH |
1305 | continue; |
1306 | } | |
1307 | ||
01e1a5bc NC |
1308 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
1309 | files[i].dir ? dirs [files [i].dir] : ""); | |
1310 | size = strlen (fullfilename) + 1; | |
fac0d250 | 1311 | cp = frag_more (size); |
01e1a5bc | 1312 | memcpy (cp, fullfilename, size); |
fac0d250 | 1313 | |
220e750f | 1314 | out_uleb128 (files[i].dir); /* directory number */ |
01e1a5bc NC |
1315 | /* Output the last modification timestamp. */ |
1316 | out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename, | |
1317 | files[i].dir ? dirs [files [i].dir] : "")); | |
1318 | /* Output the filesize. */ | |
1319 | out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename, | |
1320 | files[i].dir ? dirs [files [i].dir] : "")); | |
fac0d250 | 1321 | } |
353e2c69 KH |
1322 | |
1323 | /* Terminate filename list. */ | |
1324 | out_byte (0); | |
fac0d250 RH |
1325 | } |
1326 | ||
413a266c AM |
1327 | /* Switch to SEC and output a header length field. Return the size of |
1328 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
1329 | to the end of the section. */ | |
1330 | ||
1331 | static int | |
1332 | out_header (asection *sec, expressionS *expr) | |
1333 | { | |
1334 | symbolS *start_sym; | |
1335 | symbolS *end_sym; | |
1336 | ||
1337 | subseg_set (sec, 0); | |
1338 | start_sym = symbol_temp_new_now ();; | |
1339 | end_sym = symbol_temp_make (); | |
1340 | ||
1341 | /* Total length of the information. */ | |
1342 | expr->X_op = O_subtract; | |
1343 | expr->X_add_symbol = end_sym; | |
1344 | expr->X_op_symbol = start_sym; | |
1345 | ||
1346 | switch (DWARF2_FORMAT (sec)) | |
1347 | { | |
1348 | case dwarf2_format_32bit: | |
1349 | expr->X_add_number = -4; | |
1350 | emit_expr (expr, 4); | |
1351 | return 4; | |
1352 | ||
1353 | case dwarf2_format_64bit: | |
1354 | expr->X_add_number = -12; | |
1355 | out_four (-1); | |
1356 | emit_expr (expr, 8); | |
1357 | return 8; | |
1358 | ||
1359 | case dwarf2_format_64bit_irix: | |
1360 | expr->X_add_number = -8; | |
1361 | emit_expr (expr, 8); | |
1362 | return 8; | |
1363 | } | |
1364 | ||
1365 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1366 | return 0; | |
1367 | } | |
1368 | ||
220e750f RH |
1369 | /* Emit the collected .debug_line data. */ |
1370 | ||
1371 | static void | |
a2e22468 | 1372 | out_debug_line (segT line_seg) |
220e750f RH |
1373 | { |
1374 | expressionS expr; | |
220e750f RH |
1375 | symbolS *prologue_end; |
1376 | symbolS *line_end; | |
1377 | struct line_seg *s; | |
14e777e0 | 1378 | int sizeof_offset; |
220e750f | 1379 | |
413a266c AM |
1380 | sizeof_offset = out_header (line_seg, &expr); |
1381 | line_end = expr.X_add_symbol; | |
220e750f RH |
1382 | |
1383 | /* Version. */ | |
1384 | out_two (2); | |
1385 | ||
1386 | /* Length of the prologue following this length. */ | |
413a266c | 1387 | prologue_end = symbol_temp_make (); |
220e750f | 1388 | expr.X_add_symbol = prologue_end; |
220e750f | 1389 | expr.X_add_number = - (4 + 2 + 4); |
14e777e0 | 1390 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1391 | |
1392 | /* Parameters of the state machine. */ | |
1393 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1394 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1395 | out_byte (DWARF2_LINE_BASE); | |
1396 | out_byte (DWARF2_LINE_RANGE); | |
1397 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1398 | ||
1399 | /* Standard opcode lengths. */ | |
1400 | out_byte (0); /* DW_LNS_copy */ | |
1401 | out_byte (1); /* DW_LNS_advance_pc */ | |
1402 | out_byte (1); /* DW_LNS_advance_line */ | |
1403 | out_byte (1); /* DW_LNS_set_file */ | |
1404 | out_byte (1); /* DW_LNS_set_column */ | |
1405 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1406 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1407 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1408 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1409 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1410 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1411 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1412 | |
1413 | out_file_list (); | |
1414 | ||
b7d6ed97 | 1415 | symbol_set_value_now (prologue_end); |
220e750f RH |
1416 | |
1417 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1418 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1419 | process_entries (s->seg, s->head->head); |
1420 | ||
b7d6ed97 | 1421 | symbol_set_value_now (line_end); |
220e750f RH |
1422 | } |
1423 | ||
802f5d9e NC |
1424 | static void |
1425 | out_debug_ranges (segT ranges_seg) | |
1426 | { | |
1427 | unsigned int addr_size = sizeof_address; | |
1428 | struct line_seg *s; | |
1429 | expressionS expr; | |
1430 | unsigned int i; | |
1431 | ||
1432 | subseg_set (ranges_seg, 0); | |
1433 | ||
1434 | /* Base Address Entry. */ | |
7fd3924a | 1435 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1436 | out_byte (0xff); |
7fd3924a | 1437 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1438 | out_byte (0); |
1439 | ||
1440 | /* Range List Entry. */ | |
1441 | for (s = all_segs; s; s = s->next) | |
1442 | { | |
1443 | fragS *frag; | |
1444 | symbolS *beg, *end; | |
1445 | ||
1446 | frag = first_frag_for_seg (s->seg); | |
1447 | beg = symbol_temp_new (s->seg, 0, frag); | |
1448 | s->text_start = beg; | |
1449 | ||
1450 | frag = last_frag_for_seg (s->seg); | |
1451 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
1452 | s->text_end = end; | |
1453 | ||
1454 | expr.X_op = O_symbol; | |
1455 | expr.X_add_symbol = beg; | |
1456 | expr.X_add_number = 0; | |
1457 | emit_expr (&expr, addr_size); | |
1458 | ||
1459 | expr.X_op = O_symbol; | |
1460 | expr.X_add_symbol = end; | |
1461 | expr.X_add_number = 0; | |
1462 | emit_expr (&expr, addr_size); | |
1463 | } | |
1464 | ||
1465 | /* End of Range Entry. */ | |
7fd3924a | 1466 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1467 | out_byte (0); |
7fd3924a | 1468 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1469 | out_byte (0); |
1470 | } | |
1471 | ||
220e750f RH |
1472 | /* Emit data for .debug_aranges. */ |
1473 | ||
58b5739a | 1474 | static void |
a2e22468 | 1475 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1476 | { |
220e750f | 1477 | unsigned int addr_size = sizeof_address; |
220e750f RH |
1478 | struct line_seg *s; |
1479 | expressionS expr; | |
413a266c | 1480 | symbolS *aranges_end; |
220e750f | 1481 | char *p; |
413a266c | 1482 | int sizeof_offset; |
fac0d250 | 1483 | |
413a266c AM |
1484 | sizeof_offset = out_header (aranges_seg, &expr); |
1485 | aranges_end = expr.X_add_symbol; | |
fac0d250 | 1486 | |
220e750f RH |
1487 | /* Version. */ |
1488 | out_two (2); | |
4dc7ead9 | 1489 | |
220e750f | 1490 | /* Offset to .debug_info. */ |
413a266c | 1491 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
220e750f RH |
1492 | |
1493 | /* Size of an address (offset portion). */ | |
1494 | out_byte (addr_size); | |
1495 | ||
1496 | /* Size of a segment descriptor. */ | |
1497 | out_byte (0); | |
1498 | ||
1499 | /* Align the header. */ | |
413a266c | 1500 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1501 | |
ee515fb7 | 1502 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1503 | { |
1504 | fragS *frag; | |
1505 | symbolS *beg, *end; | |
1506 | ||
1507 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1508 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1509 | s->text_start = beg; |
1510 | ||
1511 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 1512 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
1513 | s->text_end = end; |
1514 | ||
1515 | expr.X_op = O_symbol; | |
1516 | expr.X_add_symbol = beg; | |
1517 | expr.X_add_number = 0; | |
1518 | emit_expr (&expr, addr_size); | |
1519 | ||
1520 | expr.X_op = O_subtract; | |
1521 | expr.X_add_symbol = end; | |
1522 | expr.X_op_symbol = beg; | |
1523 | expr.X_add_number = 0; | |
1524 | emit_expr (&expr, addr_size); | |
1525 | } | |
4dc7ead9 | 1526 | |
220e750f RH |
1527 | p = frag_more (2 * addr_size); |
1528 | md_number_to_chars (p, 0, addr_size); | |
1529 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c AM |
1530 | |
1531 | symbol_set_value_now (aranges_end); | |
4dc7ead9 RH |
1532 | } |
1533 | ||
220e750f RH |
1534 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1535 | sync with out_debug_info below. */ | |
fac0d250 | 1536 | |
220e750f | 1537 | static void |
413a266c AM |
1538 | out_debug_abbrev (segT abbrev_seg, |
1539 | segT info_seg ATTRIBUTE_UNUSED, | |
1540 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f RH |
1541 | { |
1542 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1543 | |
220e750f RH |
1544 | out_uleb128 (1); |
1545 | out_uleb128 (DW_TAG_compile_unit); | |
1546 | out_byte (DW_CHILDREN_no); | |
413a266c AM |
1547 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) |
1548 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1549 | else | |
1550 | out_abbrev (DW_AT_stmt_list, DW_FORM_data8); | |
220e750f | 1551 | if (all_segs->next == NULL) |
4dc7ead9 | 1552 | { |
220e750f RH |
1553 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1554 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1555 | } | |
802f5d9e NC |
1556 | else |
1557 | { | |
413a266c | 1558 | if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit) |
802f5d9e NC |
1559 | out_abbrev (DW_AT_ranges, DW_FORM_data4); |
1560 | else | |
1561 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
1562 | } | |
48b91938 | 1563 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1564 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1565 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1566 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1567 | out_abbrev (0, 0); | |
a987bfc9 RH |
1568 | |
1569 | /* Terminate the abbreviations for this compilation unit. */ | |
1570 | out_byte (0); | |
220e750f | 1571 | } |
4dc7ead9 | 1572 | |
220e750f | 1573 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1574 | |
220e750f | 1575 | static void |
802f5d9e | 1576 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) |
220e750f RH |
1577 | { |
1578 | char producer[128]; | |
3d6b762c JM |
1579 | const char *comp_dir; |
1580 | const char *dirname; | |
220e750f | 1581 | expressionS expr; |
220e750f RH |
1582 | symbolS *info_end; |
1583 | char *p; | |
1584 | int len; | |
14e777e0 | 1585 | int sizeof_offset; |
4dc7ead9 | 1586 | |
413a266c AM |
1587 | sizeof_offset = out_header (info_seg, &expr); |
1588 | info_end = expr.X_add_symbol; | |
4dc7ead9 | 1589 | |
220e750f RH |
1590 | /* DWARF version. */ |
1591 | out_two (2); | |
4dc7ead9 | 1592 | |
220e750f | 1593 | /* .debug_abbrev offset */ |
6174d9c8 | 1594 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1595 | |
220e750f RH |
1596 | /* Target address size. */ |
1597 | out_byte (sizeof_address); | |
fac0d250 | 1598 | |
220e750f RH |
1599 | /* DW_TAG_compile_unit DIE abbrev */ |
1600 | out_uleb128 (1); | |
fac0d250 | 1601 | |
220e750f | 1602 | /* DW_AT_stmt_list */ |
413a266c AM |
1603 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
1604 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
1605 | ? 4 : 8)); | |
fac0d250 | 1606 | |
802f5d9e | 1607 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 1608 | if (all_segs->next == NULL) |
58b5739a | 1609 | { |
220e750f RH |
1610 | /* DW_AT_low_pc */ |
1611 | expr.X_op = O_symbol; | |
1612 | expr.X_add_symbol = all_segs->text_start; | |
1613 | expr.X_add_number = 0; | |
1614 | emit_expr (&expr, sizeof_address); | |
1615 | ||
1616 | /* DW_AT_high_pc */ | |
1617 | expr.X_op = O_symbol; | |
1618 | expr.X_add_symbol = all_segs->text_end; | |
1619 | expr.X_add_number = 0; | |
1620 | emit_expr (&expr, sizeof_address); | |
58b5739a | 1621 | } |
802f5d9e NC |
1622 | else |
1623 | { | |
eb1fe072 NC |
1624 | /* This attribute is emitted if the code is disjoint. */ |
1625 | /* DW_AT_ranges. */ | |
1626 | TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset); | |
802f5d9e | 1627 | } |
58b5739a | 1628 | |
48b91938 RH |
1629 | /* DW_AT_name. We don't have the actual file name that was present |
1630 | on the command line, so assume files[1] is the main input file. | |
1631 | We're not supposed to get called unless at least one line number | |
1632 | entry was emitted, so this should always be defined. */ | |
7fd3924a | 1633 | if (files_in_use == 0) |
48b91938 | 1634 | abort (); |
a7ed1ca2 NC |
1635 | if (files[1].dir) |
1636 | { | |
3d6b762c JM |
1637 | dirname = remap_debug_filename (dirs[files[1].dir]); |
1638 | len = strlen (dirname); | |
a7ed1ca2 | 1639 | p = frag_more (len + 1); |
3d6b762c | 1640 | memcpy (p, dirname, len); |
56487c55 | 1641 | INSERT_DIR_SEPARATOR (p, len); |
a7ed1ca2 | 1642 | } |
48b91938 RH |
1643 | len = strlen (files[1].filename) + 1; |
1644 | p = frag_more (len); | |
1645 | memcpy (p, files[1].filename, len); | |
1646 | ||
220e750f | 1647 | /* DW_AT_comp_dir */ |
3d6b762c | 1648 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
1649 | len = strlen (comp_dir) + 1; |
1650 | p = frag_more (len); | |
1651 | memcpy (p, comp_dir, len); | |
fac0d250 | 1652 | |
220e750f RH |
1653 | /* DW_AT_producer */ |
1654 | sprintf (producer, "GNU AS %s", VERSION); | |
1655 | len = strlen (producer) + 1; | |
1656 | p = frag_more (len); | |
1657 | memcpy (p, producer, len); | |
fac0d250 | 1658 | |
220e750f RH |
1659 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1660 | dwarf2 draft has no standard code for assembler. */ | |
1661 | out_two (DW_LANG_Mips_Assembler); | |
1662 | ||
b7d6ed97 | 1663 | symbol_set_value_now (info_end); |
fac0d250 RH |
1664 | } |
1665 | ||
c6cb92c5 NS |
1666 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1667 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
1668 | file has a non-empty .debug_info section. If we emit .debug_line, | |
1669 | and the .debug_info section is empty, we also emit .debug_info, | |
1670 | .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if | |
1671 | there were any .file/.loc directives, or --gdwarf2 was given and | |
1672 | there were any located instructions emitted. */ | |
1673 | ||
fac0d250 | 1674 | void |
a2e22468 | 1675 | dwarf2_finish (void) |
fac0d250 | 1676 | { |
220e750f RH |
1677 | segT line_seg; |
1678 | struct line_seg *s; | |
c6cb92c5 NS |
1679 | segT info_seg; |
1680 | int emit_other_sections = 0; | |
1681 | ||
1682 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1683 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1684 | |
c6cb92c5 NS |
1685 | if (!all_segs && emit_other_sections) |
1686 | /* There is no line information and no non-empty .debug_info | |
1687 | section. */ | |
220e750f | 1688 | return; |
fac0d250 | 1689 | |
220e750f | 1690 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1691 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1692 | |
220e750f RH |
1693 | /* Create and switch to the line number section. */ |
1694 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1695 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1696 | |
220e750f | 1697 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1698 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1699 | { |
220e750f RH |
1700 | struct line_subseg *ss = s->head; |
1701 | struct line_entry **ptail = ss->ptail; | |
1702 | ||
1703 | while ((ss = ss->next) != NULL) | |
1704 | { | |
1705 | *ptail = ss->head; | |
1706 | ptail = ss->ptail; | |
1707 | } | |
fac0d250 | 1708 | } |
85a39694 | 1709 | |
220e750f | 1710 | out_debug_line (line_seg); |
85a39694 | 1711 | |
c6cb92c5 NS |
1712 | /* If this is assembler generated line info, and there is no |
1713 | debug_info already, we need .debug_info and .debug_abbrev | |
1714 | sections as well. */ | |
1715 | if (emit_other_sections) | |
220e750f RH |
1716 | { |
1717 | segT abbrev_seg; | |
220e750f | 1718 | segT aranges_seg; |
802f5d9e | 1719 | segT ranges_seg; |
4dc7ead9 | 1720 | |
c6cb92c5 | 1721 | assert (all_segs); |
7fd3924a | 1722 | |
220e750f RH |
1723 | info_seg = subseg_new (".debug_info", 0); |
1724 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1725 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1726 | |
8a7140c3 NC |
1727 | bfd_set_section_flags (stdoutput, info_seg, |
1728 | SEC_READONLY | SEC_DEBUGGING); | |
1729 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1730 | SEC_READONLY | SEC_DEBUGGING); | |
1731 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1732 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1733 | |
ee515fb7 | 1734 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1735 | |
802f5d9e NC |
1736 | if (all_segs->next == NULL) |
1737 | ranges_seg = NULL; | |
1738 | else | |
1739 | { | |
1740 | ranges_seg = subseg_new (".debug_ranges", 0); | |
7fd3924a | 1741 | bfd_set_section_flags (stdoutput, ranges_seg, |
802f5d9e NC |
1742 | SEC_READONLY | SEC_DEBUGGING); |
1743 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
1744 | out_debug_ranges (ranges_seg); | |
1745 | } | |
1746 | ||
220e750f | 1747 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 1748 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
802f5d9e | 1749 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg); |
220e750f | 1750 | } |
85a39694 | 1751 | } |