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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
a7ed1ca2 | 2 | Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
fac0d250 RH |
3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
89b66cde | 20 | 02111-1307, USA. */ |
fac0d250 | 21 | |
89b66cde | 22 | /* Logical line numbers can be controlled by the compiler via the |
fac0d250 RH |
23 | following two directives: |
24 | ||
25 | .file FILENO "file.c" | |
26 | .loc FILENO LINENO [COLUMN] | |
27 | ||
28 | FILENO is the filenumber. */ | |
29 | ||
30 | #include "ansidecl.h" | |
fac0d250 | 31 | #include "as.h" |
92eb7b32 | 32 | |
42dbf88c NC |
33 | #ifdef HAVE_LIMITS_H |
34 | #include <limits.h> | |
92625c16 | 35 | #else |
6717891c NC |
36 | #ifdef HAVE_SYS_PARAM_H |
37 | #include <sys/param.h> | |
38 | #endif | |
6256f9dd | 39 | #ifndef INT_MAX |
ee515fb7 | 40 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 41 | #endif |
b8f080d6 | 42 | #endif |
42dbf88c | 43 | |
70658493 | 44 | #include "dwarf2dbg.h" |
a7ed1ca2 | 45 | #include <filenames.h> |
70658493 | 46 | |
14e777e0 | 47 | #ifndef DWARF2_FORMAT |
9605f328 | 48 | # define DWARF2_FORMAT() dwarf2_format_32bit |
14e777e0 KB |
49 | #endif |
50 | ||
9605f328 AO |
51 | #ifndef DWARF2_ADDR_SIZE |
52 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8); | |
53 | #endif | |
54 | ||
6174d9c8 RH |
55 | #ifndef TC_DWARF2_EMIT_OFFSET |
56 | # define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset | |
57 | #endif | |
9605f328 | 58 | |
92eb7b32 L |
59 | #ifdef BFD_ASSEMBLER |
60 | ||
fac0d250 RH |
61 | #include "subsegs.h" |
62 | ||
d9ac5a3b | 63 | #include "elf/dwarf2.h" |
fac0d250 | 64 | |
fac0d250 RH |
65 | /* Since we can't generate the prolog until the body is complete, we |
66 | use three different subsegments for .debug_line: one holding the | |
67 | prolog, one for the directory and filename info, and one for the | |
68 | body ("statement program"). */ | |
69 | #define DL_PROLOG 0 | |
70 | #define DL_FILES 1 | |
71 | #define DL_BODY 2 | |
72 | ||
73 | /* First special line opcde - leave room for the standard opcodes. | |
74 | Note: If you want to change this, you'll have to update the | |
75 | "standard_opcode_lengths" table that is emitted below in | |
76 | dwarf2_finish(). */ | |
77 | #define DWARF2_LINE_OPCODE_BASE 10 | |
78 | ||
79 | #ifndef DWARF2_LINE_BASE | |
80 | /* Minimum line offset in a special line info. opcode. This value | |
81 | was chosen to give a reasonable range of values. */ | |
82 | # define DWARF2_LINE_BASE -5 | |
83 | #endif | |
84 | ||
85 | /* Range of line offsets in a special line info. opcode. */ | |
86 | #ifndef DWARF2_LINE_RANGE | |
87 | # define DWARF2_LINE_RANGE 14 | |
88 | #endif | |
89 | ||
90 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
91 | /* Define the architecture-dependent minimum instruction length (in | |
92 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 93 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
94 | #endif |
95 | ||
96 | /* Flag that indicates the initial value of the is_stmt_start flag. | |
97 | In the present implementation, we do not mark any lines as | |
98 | the beginning of a source statement, because that information | |
99 | is not made available by the GCC front-end. */ | |
100 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 | |
101 | ||
cb30237e | 102 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
103 | #define SPECIAL_LINE(op) \ |
104 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
105 | ||
106 | /* Given a special op, return the address skip amount (in units of | |
107 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
108 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
109 | ||
cb30237e | 110 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
111 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
112 | ||
ee515fb7 | 113 | struct line_entry { |
220e750f RH |
114 | struct line_entry *next; |
115 | fragS *frag; | |
116 | addressT frag_ofs; | |
117 | struct dwarf2_line_info loc; | |
e6c774b4 | 118 | }; |
fac0d250 | 119 | |
ee515fb7 | 120 | struct line_subseg { |
220e750f RH |
121 | struct line_subseg *next; |
122 | subsegT subseg; | |
123 | struct line_entry *head; | |
124 | struct line_entry **ptail; | |
125 | }; | |
353e2c69 | 126 | |
ee515fb7 | 127 | struct line_seg { |
220e750f RH |
128 | struct line_seg *next; |
129 | segT seg; | |
130 | struct line_subseg *head; | |
131 | symbolS *text_start; | |
132 | symbolS *text_end; | |
133 | }; | |
134 | ||
135 | /* Collects data for all line table entries during assembly. */ | |
136 | static struct line_seg *all_segs; | |
137 | ||
ee515fb7 | 138 | struct file_entry { |
a7ed1ca2 | 139 | const char *filename; |
220e750f RH |
140 | unsigned int dir; |
141 | }; | |
142 | ||
143 | /* Table of files used by .debug_line. */ | |
144 | static struct file_entry *files; | |
145 | static unsigned int files_in_use; | |
146 | static unsigned int files_allocated; | |
147 | ||
a7ed1ca2 NC |
148 | /* Table of directories used by .debug_line. */ |
149 | static char **dirs; | |
150 | static unsigned int dirs_in_use; | |
151 | static unsigned int dirs_allocated; | |
152 | ||
b34976b6 | 153 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 154 | doing work when there's nothing to do. */ |
b34976b6 | 155 | static bfd_boolean loc_directive_seen; |
220e750f RH |
156 | |
157 | /* Current location as indicated by the most recent .loc directive. */ | |
158 | static struct dwarf2_line_info current; | |
159 | ||
160 | /* Fake label name. */ | |
161 | static char const fake_label_name[] = ".L0\001"; | |
162 | ||
163 | /* The size of an address on the target. */ | |
164 | static unsigned int sizeof_address; | |
165 | \f | |
6174d9c8 | 166 | static void generic_dwarf2_emit_offset PARAMS((symbolS *, unsigned int)); |
220e750f | 167 | static struct line_subseg *get_line_subseg PARAMS ((segT, subsegT)); |
a7ed1ca2 | 168 | static unsigned int get_filenum PARAMS ((const char *, unsigned int)); |
220e750f RH |
169 | static struct frag *first_frag_for_seg PARAMS ((segT)); |
170 | static struct frag *last_frag_for_seg PARAMS ((segT)); | |
171 | static void out_byte PARAMS ((int)); | |
172 | static void out_opcode PARAMS ((int)); | |
173 | static void out_two PARAMS ((int)); | |
174 | static void out_four PARAMS ((int)); | |
175 | static void out_abbrev PARAMS ((int, int)); | |
176 | static void out_uleb128 PARAMS ((addressT)); | |
177 | static symbolS *symbol_new_now PARAMS ((void)); | |
178 | static void set_symbol_value_now PARAMS ((symbolS *)); | |
179 | static offsetT get_frag_fix PARAMS ((fragS *)); | |
180 | static void out_set_addr PARAMS ((segT, fragS *, addressT)); | |
181 | static int size_inc_line_addr PARAMS ((int, addressT)); | |
182 | static void emit_inc_line_addr PARAMS ((int, addressT, char *, int)); | |
183 | static void out_inc_line_addr PARAMS ((int, addressT)); | |
184 | static void relax_inc_line_addr PARAMS ((int, segT, fragS *, addressT, | |
185 | fragS *, addressT)); | |
186 | static void process_entries PARAMS ((segT, struct line_entry *)); | |
187 | static void out_file_list PARAMS ((void)); | |
188 | static void out_debug_line PARAMS ((segT)); | |
189 | static void out_debug_aranges PARAMS ((segT, segT)); | |
190 | static void out_debug_abbrev PARAMS ((segT)); | |
191 | static void out_debug_info PARAMS ((segT, segT, segT)); | |
192 | \f | |
6174d9c8 RH |
193 | /* Create an offset to .dwarf2_*. */ |
194 | ||
195 | static void | |
196 | generic_dwarf2_emit_offset (symbol, size) | |
197 | symbolS *symbol; | |
198 | unsigned int size; | |
199 | { | |
200 | expressionS expr; | |
201 | ||
202 | expr.X_op = O_symbol; | |
203 | expr.X_add_symbol = symbol; | |
204 | expr.X_add_number = 0; | |
205 | emit_expr (&expr, size); | |
206 | } | |
207 | ||
220e750f RH |
208 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
209 | ||
210 | static struct line_subseg * | |
211 | get_line_subseg (seg, subseg) | |
212 | segT seg; | |
213 | subsegT subseg; | |
214 | { | |
215 | static segT last_seg; | |
216 | static subsegT last_subseg; | |
217 | static struct line_subseg *last_line_subseg; | |
218 | ||
219 | struct line_seg *s; | |
220 | struct line_subseg **pss, *ss; | |
fac0d250 | 221 | |
220e750f RH |
222 | if (seg == last_seg && subseg == last_subseg) |
223 | return last_line_subseg; | |
224 | ||
ee515fb7 | 225 | for (s = all_segs; s; s = s->next) |
220e750f RH |
226 | if (s->seg == seg) |
227 | goto found_seg; | |
228 | ||
229 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
230 | s->next = all_segs; | |
231 | s->seg = seg; | |
232 | s->head = NULL; | |
233 | all_segs = s; | |
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 | ||
220e750f | 259 | /* Record an entry for LOC ocurring at OFS within the current fragment. */ |
353e2c69 | 260 | |
220e750f RH |
261 | void |
262 | dwarf2_gen_line_info (ofs, loc) | |
263 | addressT ofs; | |
264 | struct dwarf2_line_info *loc; | |
fac0d250 | 265 | { |
220e750f RH |
266 | struct line_subseg *ss; |
267 | struct line_entry *e; | |
1ea5c325 MS |
268 | static unsigned int line = -1; |
269 | static unsigned int filenum = -1; | |
220e750f RH |
270 | |
271 | /* Early out for as-yet incomplete location information. */ | |
272 | if (loc->filenum == 0 || loc->line == 0) | |
273 | return; | |
274 | ||
ffa554ed GK |
275 | /* Don't emit sequences of line symbols for the same line when the |
276 | symbols apply to assembler code. It is necessary to emit | |
277 | duplicate line symbols when a compiler asks for them, because GDB | |
278 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 279 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 280 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
281 | return; |
282 | ||
283 | line = loc->line; | |
284 | filenum = loc->filenum; | |
285 | ||
220e750f RH |
286 | e = (struct line_entry *) xmalloc (sizeof (*e)); |
287 | e->next = NULL; | |
288 | e->frag = frag_now; | |
289 | e->frag_ofs = ofs; | |
290 | e->loc = *loc; | |
291 | ||
292 | ss = get_line_subseg (now_seg, now_subseg); | |
293 | *ss->ptail = e; | |
294 | ss->ptail = &e->next; | |
295 | } | |
fac0d250 | 296 | |
220e750f RH |
297 | void |
298 | dwarf2_where (line) | |
299 | struct dwarf2_line_info *line; | |
300 | { | |
301 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 302 | { |
220e750f RH |
303 | char *filename; |
304 | as_where (&filename, &line->line); | |
a7ed1ca2 | 305 | line->filenum = get_filenum (filename, 0); |
220e750f RH |
306 | line->column = 0; |
307 | line->flags = DWARF2_FLAG_BEGIN_STMT; | |
fac0d250 | 308 | } |
220e750f RH |
309 | else |
310 | *line = current; | |
fac0d250 RH |
311 | } |
312 | ||
220e750f RH |
313 | /* Called for each machine instruction, or relatively atomic group of |
314 | machine instructions (ie built-in macro). The instruction or group | |
315 | is SIZE bytes in length. If dwarf2 line number generation is called | |
316 | for, emit a line statement appropriately. */ | |
353e2c69 | 317 | |
220e750f RH |
318 | void |
319 | dwarf2_emit_insn (size) | |
320 | int size; | |
fac0d250 | 321 | { |
220e750f | 322 | struct dwarf2_line_info loc; |
fac0d250 | 323 | |
b6675117 | 324 | if (loc_directive_seen) |
1080e97d L |
325 | { |
326 | /* Use the last location established by a .loc directive, not | |
327 | the value returned by dwarf2_where(). That calls as_where() | |
328 | which will return either the logical input file name (foo.c) | |
329 | or the physical input file name (foo.s) and not the file name | |
330 | specified in the most recent .loc directive (eg foo.h). */ | |
331 | loc = current; | |
332 | ||
333 | /* Unless we generate DWARF2 debugging information for each | |
334 | assembler line, we only emit one line symbol for one LOC. */ | |
335 | if (debug_type != DEBUG_DWARF2) | |
b34976b6 | 336 | loc_directive_seen = FALSE; |
1080e97d | 337 | } |
b6675117 | 338 | else if (debug_type != DEBUG_DWARF2) |
220e750f | 339 | return; |
b6675117 NC |
340 | else |
341 | dwarf2_where (& loc); | |
342 | ||
220e750f RH |
343 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
344 | } | |
fac0d250 | 345 | |
a7ed1ca2 NC |
346 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
347 | allocate it on that file table slot, otherwise return the first | |
348 | empty one. */ | |
220e750f RH |
349 | |
350 | static unsigned int | |
a7ed1ca2 | 351 | get_filenum (filename, num) |
220e750f | 352 | const char *filename; |
a7ed1ca2 | 353 | unsigned int num; |
220e750f | 354 | { |
a7ed1ca2 NC |
355 | static unsigned int last_used, last_used_dir_len; |
356 | const char *file; | |
357 | size_t dir_len; | |
358 | unsigned int i, dir; | |
220e750f | 359 | |
a7ed1ca2 NC |
360 | if (num == 0 && last_used) |
361 | { | |
362 | if (! files[last_used].dir | |
363 | && strcmp (filename, files[last_used].filename) == 0) | |
364 | return last_used; | |
365 | if (files[last_used].dir | |
366 | && strncmp (filename, dirs[files[last_used].dir], | |
367 | last_used_dir_len) == 0 | |
368 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
369 | && strcmp (filename + last_used_dir_len + 1, | |
370 | files[last_used].filename) == 0) | |
371 | return last_used; | |
372 | } | |
220e750f | 373 | |
a7ed1ca2 NC |
374 | file = lbasename (filename); |
375 | /* Don't make empty string from / or A: from A:/ . */ | |
376 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
377 | if (file <= filename + 3) | |
378 | file = filename; | |
379 | #else | |
380 | if (file == filename + 1) | |
381 | file = filename; | |
382 | #endif | |
383 | dir_len = file - filename; | |
384 | ||
385 | dir = 0; | |
386 | if (dir_len) | |
387 | { | |
388 | --dir_len; | |
389 | for (dir = 1; dir < dirs_in_use; ++dir) | |
390 | if (memcmp (filename, dirs[dir], dir_len) == 0 | |
391 | && dirs[dir][dir_len] == '\0') | |
392 | break; | |
393 | ||
394 | if (dir >= dirs_in_use) | |
395 | { | |
396 | if (dir >= dirs_allocated) | |
397 | { | |
398 | dirs_allocated = dir + 32; | |
399 | dirs = (char **) | |
400 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
401 | } | |
402 | ||
403 | dirs[dir] = xmalloc (dir_len + 1); | |
404 | memcpy (dirs[dir], filename, dir_len); | |
405 | dirs[dir][dir_len] = '\0'; | |
406 | dirs_in_use = dir + 1; | |
407 | } | |
408 | } | |
409 | ||
410 | if (num == 0) | |
411 | { | |
412 | for (i = 1; i < files_in_use; ++i) | |
413 | if (files[i].dir == dir | |
414 | && strcmp (file, files[i].filename) == 0) | |
415 | { | |
416 | last_used = i; | |
417 | last_used_dir_len = dir_len; | |
418 | return i; | |
419 | } | |
420 | } | |
421 | else | |
422 | i = num; | |
220e750f RH |
423 | |
424 | if (i >= files_allocated) | |
fac0d250 | 425 | { |
249e3833 RH |
426 | unsigned int old = files_allocated; |
427 | ||
220e750f RH |
428 | files_allocated = i + 32; |
429 | files = (struct file_entry *) | |
ee515fb7 | 430 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
431 | |
432 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
433 | } |
434 | ||
a7ed1ca2 NC |
435 | files[i].filename = num ? file : xstrdup (file); |
436 | files[i].dir = dir; | |
220e750f RH |
437 | files_in_use = i + 1; |
438 | last_used = i; | |
a7ed1ca2 | 439 | last_used_dir_len = dir_len; |
220e750f RH |
440 | |
441 | return i; | |
442 | } | |
fac0d250 | 443 | |
ecb4347a DJ |
444 | /* Handle two forms of .file directive: |
445 | - Pass .file "source.c" to s_app_file | |
446 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 447 | |
ecb4347a DJ |
448 | If an entry is added to the file table, return a pointer to the filename. */ |
449 | ||
450 | char * | |
220e750f RH |
451 | dwarf2_directive_file (dummy) |
452 | int dummy ATTRIBUTE_UNUSED; | |
453 | { | |
454 | offsetT num; | |
e46d99eb | 455 | char *filename; |
220e750f RH |
456 | int filename_len; |
457 | ||
458 | /* Continue to accept a bare string and pass it off. */ | |
459 | SKIP_WHITESPACE (); | |
460 | if (*input_line_pointer == '"') | |
fac0d250 | 461 | { |
220e750f | 462 | s_app_file (0); |
ecb4347a | 463 | return NULL; |
fac0d250 RH |
464 | } |
465 | ||
220e750f RH |
466 | num = get_absolute_expression (); |
467 | filename = demand_copy_C_string (&filename_len); | |
468 | demand_empty_rest_of_line (); | |
469 | ||
249e3833 | 470 | if (num < 1) |
fac0d250 | 471 | { |
0e389e77 | 472 | as_bad (_("file number less than one")); |
ecb4347a | 473 | return NULL; |
fac0d250 RH |
474 | } |
475 | ||
0e1a166b | 476 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 477 | { |
0e389e77 | 478 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 479 | return NULL; |
249e3833 | 480 | } |
220e750f | 481 | |
a7ed1ca2 | 482 | get_filenum (filename, num); |
ecb4347a DJ |
483 | |
484 | return filename; | |
fac0d250 RH |
485 | } |
486 | ||
220e750f RH |
487 | void |
488 | dwarf2_directive_loc (dummy) | |
489 | int dummy ATTRIBUTE_UNUSED; | |
490 | { | |
491 | offsetT filenum, line, column; | |
492 | ||
493 | filenum = get_absolute_expression (); | |
494 | SKIP_WHITESPACE (); | |
495 | line = get_absolute_expression (); | |
496 | SKIP_WHITESPACE (); | |
497 | column = get_absolute_expression (); | |
498 | demand_empty_rest_of_line (); | |
499 | ||
249e3833 | 500 | if (filenum < 1) |
220e750f | 501 | { |
0e389e77 | 502 | as_bad (_("file number less than one")); |
220e750f RH |
503 | return; |
504 | } | |
249e3833 | 505 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) |
220e750f | 506 | { |
0e389e77 | 507 | as_bad (_("unassigned file number %ld"), (long) filenum); |
220e750f RH |
508 | return; |
509 | } | |
510 | ||
249e3833 | 511 | current.filenum = filenum; |
220e750f RH |
512 | current.line = line; |
513 | current.column = column; | |
514 | current.flags = DWARF2_FLAG_BEGIN_STMT; | |
515 | ||
b34976b6 | 516 | loc_directive_seen = TRUE; |
220e750f RH |
517 | |
518 | #ifndef NO_LISTING | |
519 | if (listing) | |
9d66a1d9 | 520 | { |
a7ed1ca2 NC |
521 | if (files[filenum].dir) |
522 | { | |
523 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
524 | size_t file_len = strlen (files[filenum].filename); | |
525 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
526 | ||
527 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
528 | cp[dir_len] = '/'; | |
529 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); | |
530 | cp[dir_len + file_len + 1] = '\0'; | |
531 | listing_source_file (cp); | |
532 | } | |
533 | else | |
534 | listing_source_file (files[filenum].filename); | |
9d66a1d9 L |
535 | listing_source_line (line); |
536 | } | |
220e750f RH |
537 | #endif |
538 | } | |
220e750f RH |
539 | \f |
540 | static struct frag * | |
541 | first_frag_for_seg (seg) | |
542 | segT seg; | |
543 | { | |
544 | frchainS *f, *first = NULL; | |
545 | ||
ee515fb7 | 546 | for (f = frchain_root; f; f = f->frch_next) |
220e750f RH |
547 | if (f->frch_seg == seg |
548 | && (! first || first->frch_subseg > f->frch_subseg)) | |
549 | first = f; | |
550 | ||
551 | return first ? first->frch_root : NULL; | |
552 | } | |
553 | ||
554 | static struct frag * | |
555 | last_frag_for_seg (seg) | |
556 | segT seg; | |
557 | { | |
558 | frchainS *f, *last = NULL; | |
559 | ||
ee515fb7 | 560 | for (f = frchain_root; f; f = f->frch_next) |
220e750f RH |
561 | if (f->frch_seg == seg |
562 | && (! last || last->frch_subseg < f->frch_subseg)) | |
563 | last= f; | |
564 | ||
565 | return last ? last->frch_last : NULL; | |
566 | } | |
567 | \f | |
568 | /* Emit a single byte into the current segment. */ | |
569 | ||
570 | static inline void | |
571 | out_byte (byte) | |
572 | int byte; | |
573 | { | |
574 | FRAG_APPEND_1_CHAR (byte); | |
575 | } | |
576 | ||
577 | /* Emit a statement program opcode into the current segment. */ | |
578 | ||
579 | static inline void | |
580 | out_opcode (opc) | |
581 | int opc; | |
582 | { | |
583 | out_byte (opc); | |
584 | } | |
585 | ||
586 | /* Emit a two-byte word into the current segment. */ | |
587 | ||
588 | static inline void | |
589 | out_two (data) | |
590 | int data; | |
591 | { | |
592 | md_number_to_chars (frag_more (2), data, 2); | |
593 | } | |
594 | ||
595 | /* Emit a four byte word into the current segment. */ | |
596 | ||
597 | static inline void | |
598 | out_four (data) | |
599 | int data; | |
600 | { | |
601 | md_number_to_chars (frag_more (4), data, 4); | |
602 | } | |
603 | ||
604 | /* Emit an unsigned "little-endian base 128" number. */ | |
605 | ||
fac0d250 | 606 | static void |
220e750f RH |
607 | out_uleb128 (value) |
608 | addressT value; | |
609 | { | |
610 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
611 | } | |
612 | ||
613 | /* Emit a tuple for .debug_abbrev. */ | |
614 | ||
615 | static inline void | |
616 | out_abbrev (name, form) | |
617 | int name, form; | |
fac0d250 | 618 | { |
220e750f RH |
619 | out_uleb128 (name); |
620 | out_uleb128 (form); | |
621 | } | |
fac0d250 | 622 | |
220e750f RH |
623 | /* Create a new fake symbol whose value is the current position. */ |
624 | ||
625 | static symbolS * | |
626 | symbol_new_now () | |
627 | { | |
628 | return symbol_new (fake_label_name, now_seg, frag_now_fix (), frag_now); | |
fac0d250 RH |
629 | } |
630 | ||
220e750f | 631 | /* Set the value of SYM to the current position in the current segment. */ |
353e2c69 | 632 | |
fac0d250 | 633 | static void |
220e750f RH |
634 | set_symbol_value_now (sym) |
635 | symbolS *sym; | |
fac0d250 | 636 | { |
220e750f RH |
637 | S_SET_SEGMENT (sym, now_seg); |
638 | S_SET_VALUE (sym, frag_now_fix ()); | |
639 | symbol_set_frag (sym, frag_now); | |
640 | } | |
641 | ||
642 | /* Get the size of a fragment. */ | |
fac0d250 | 643 | |
220e750f RH |
644 | static offsetT |
645 | get_frag_fix (frag) | |
646 | fragS *frag; | |
647 | { | |
648 | frchainS *fr; | |
649 | ||
650 | if (frag->fr_next) | |
651 | return frag->fr_fix; | |
652 | ||
653 | /* If a fragment is the last in the chain, special measures must be | |
654 | taken to find its size before relaxation, since it may be pending | |
655 | on some subsegment chain. */ | |
ee515fb7 | 656 | for (fr = frchain_root; fr; fr = fr->frch_next) |
220e750f RH |
657 | if (fr->frch_last == frag) |
658 | { | |
7c2b59d0 AM |
659 | long align_mask = -1 << get_recorded_alignment (fr->frch_seg); |
660 | return (((char *) obstack_next_free (&fr->frch_obstack) | |
661 | - frag->fr_literal) + ~align_mask) & align_mask; | |
220e750f RH |
662 | } |
663 | ||
664 | abort (); | |
665 | } | |
fac0d250 | 666 | |
220e750f | 667 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 668 | |
220e750f RH |
669 | static void |
670 | out_set_addr (seg, frag, ofs) | |
671 | segT seg; | |
672 | fragS *frag; | |
673 | addressT ofs; | |
674 | { | |
675 | expressionS expr; | |
676 | symbolS *sym; | |
fac0d250 | 677 | |
220e750f | 678 | sym = symbol_new (fake_label_name, seg, ofs, frag); |
9e3af0e7 | 679 | |
fac0d250 | 680 | out_opcode (DW_LNS_extended_op); |
220e750f | 681 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
682 | |
683 | out_opcode (DW_LNE_set_address); | |
684 | expr.X_op = O_symbol; | |
685 | expr.X_add_symbol = sym; | |
686 | expr.X_add_number = 0; | |
220e750f | 687 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
688 | } |
689 | ||
a3b75434 | 690 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
c8970b4b AM |
691 | static void scale_addr_delta PARAMS ((addressT *)); |
692 | ||
a3b75434 DD |
693 | static void |
694 | scale_addr_delta (addr_delta) | |
c8970b4b | 695 | addressT *addr_delta; |
a3b75434 DD |
696 | { |
697 | static int printed_this = 0; | |
698 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
699 | { | |
700 | if (!printed_this) | |
701 | as_bad("unaligned opcodes detected in executable segment"); | |
702 | printed_this = 1; | |
703 | } | |
704 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
705 | } | |
706 | #else | |
707 | #define scale_addr_delta(A) | |
708 | #endif | |
709 | ||
220e750f RH |
710 | /* Encode a pair of line and address skips as efficiently as possible. |
711 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 712 | |
220e750f RH |
713 | The following two routines *must* be kept in sync. This is |
714 | enforced by making emit_inc_line_addr abort if we do not emit | |
715 | exactly the expected number of bytes. */ | |
716 | ||
717 | static int | |
718 | size_inc_line_addr (line_delta, addr_delta) | |
719 | int line_delta; | |
720 | addressT addr_delta; | |
fac0d250 | 721 | { |
220e750f RH |
722 | unsigned int tmp, opcode; |
723 | int len = 0; | |
fac0d250 | 724 | |
220e750f | 725 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 726 | scale_addr_delta (&addr_delta); |
220e750f RH |
727 | |
728 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
729 | We cannot use special opcodes here, since we want the end_sequence | |
730 | to emit the matrix entry. */ | |
731 | if (line_delta == INT_MAX) | |
fac0d250 | 732 | { |
220e750f RH |
733 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
734 | len = 1; | |
fac0d250 | 735 | else |
220e750f RH |
736 | len = 1 + sizeof_leb128 (addr_delta, 0); |
737 | return len + 3; | |
fac0d250 | 738 | } |
fac0d250 | 739 | |
220e750f RH |
740 | /* Bias the line delta by the base. */ |
741 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 742 | |
220e750f RH |
743 | /* If the line increment is out of range of a special opcode, we |
744 | must encode it with DW_LNS_advance_line. */ | |
745 | if (tmp >= DWARF2_LINE_RANGE) | |
746 | { | |
747 | len = 1 + sizeof_leb128 (line_delta, 1); | |
748 | line_delta = 0; | |
749 | tmp = 0 - DWARF2_LINE_BASE; | |
750 | } | |
fac0d250 | 751 | |
220e750f RH |
752 | /* Bias the opcode by the special opcode base. */ |
753 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 754 | |
220e750f RH |
755 | /* Avoid overflow when addr_delta is large. */ |
756 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
757 | { | |
758 | /* Try using a special opcode. */ | |
759 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
760 | if (opcode <= 255) | |
761 | return len + 1; | |
762 | ||
763 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
764 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
765 | if (opcode <= 255) | |
766 | return len + 2; | |
767 | } | |
768 | ||
769 | /* Otherwise use DW_LNS_advance_pc. */ | |
770 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
771 | ||
772 | /* DW_LNS_copy or special opcode. */ | |
773 | len += 1; | |
774 | ||
775 | return len; | |
776 | } | |
fac0d250 | 777 | |
220e750f RH |
778 | static void |
779 | emit_inc_line_addr (line_delta, addr_delta, p, len) | |
780 | int line_delta; | |
781 | addressT addr_delta; | |
782 | char *p; | |
783 | int len; | |
784 | { | |
785 | unsigned int tmp, opcode; | |
786 | int need_copy = 0; | |
787 | char *end = p + len; | |
fac0d250 | 788 | |
220e750f | 789 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
790 | scale_addr_delta (&addr_delta); |
791 | ||
220e750f RH |
792 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
793 | We cannot use special opcodes here, since we want the end_sequence | |
794 | to emit the matrix entry. */ | |
795 | if (line_delta == INT_MAX) | |
fac0d250 | 796 | { |
220e750f RH |
797 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
798 | *p++ = DW_LNS_const_add_pc; | |
799 | else | |
fac0d250 | 800 | { |
220e750f RH |
801 | *p++ = DW_LNS_advance_pc; |
802 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 803 | } |
220e750f RH |
804 | |
805 | *p++ = DW_LNS_extended_op; | |
806 | *p++ = 1; | |
807 | *p++ = DW_LNE_end_sequence; | |
808 | goto done; | |
fac0d250 RH |
809 | } |
810 | ||
220e750f RH |
811 | /* Bias the line delta by the base. */ |
812 | tmp = line_delta - DWARF2_LINE_BASE; | |
813 | ||
814 | /* If the line increment is out of range of a special opcode, we | |
815 | must encode it with DW_LNS_advance_line. */ | |
816 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 817 | { |
220e750f RH |
818 | *p++ = DW_LNS_advance_line; |
819 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 820 | |
220e750f RH |
821 | /* Prettier, I think, to use DW_LNS_copy instead of a |
822 | "line +0, addr +0" special opcode. */ | |
823 | if (addr_delta == 0) | |
824 | { | |
825 | *p++ = DW_LNS_copy; | |
826 | goto done; | |
827 | } | |
cb30237e | 828 | |
220e750f RH |
829 | line_delta = 0; |
830 | tmp = 0 - DWARF2_LINE_BASE; | |
831 | need_copy = 1; | |
832 | } | |
fac0d250 | 833 | |
220e750f RH |
834 | /* Bias the opcode by the special opcode base. */ |
835 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 836 | |
220e750f RH |
837 | /* Avoid overflow when addr_delta is large. */ |
838 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 839 | { |
220e750f RH |
840 | /* Try using a special opcode. */ |
841 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
842 | if (opcode <= 255) | |
843 | { | |
844 | *p++ = opcode; | |
845 | goto done; | |
846 | } | |
847 | ||
848 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
849 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
850 | if (opcode <= 255) | |
fac0d250 | 851 | { |
220e750f RH |
852 | *p++ = DW_LNS_const_add_pc; |
853 | *p++ = opcode; | |
854 | goto done; | |
fac0d250 RH |
855 | } |
856 | } | |
220e750f RH |
857 | |
858 | /* Otherwise use DW_LNS_advance_pc. */ | |
859 | *p++ = DW_LNS_advance_pc; | |
860 | p += output_leb128 (p, addr_delta, 0); | |
861 | ||
862 | if (need_copy) | |
863 | *p++ = DW_LNS_copy; | |
fac0d250 | 864 | else |
220e750f | 865 | *p++ = tmp; |
fac0d250 | 866 | |
220e750f RH |
867 | done: |
868 | assert (p == end); | |
869 | } | |
a8316fe2 | 870 | |
220e750f | 871 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 872 | |
220e750f RH |
873 | static void |
874 | out_inc_line_addr (line_delta, addr_delta) | |
875 | int line_delta; | |
876 | addressT addr_delta; | |
877 | { | |
878 | int len = size_inc_line_addr (line_delta, addr_delta); | |
879 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
880 | } | |
9de8d8f1 | 881 | |
220e750f RH |
882 | /* Generate a variant frag that we can use to relax address/line |
883 | increments between fragments of the target segment. */ | |
9e3af0e7 | 884 | |
220e750f RH |
885 | static void |
886 | relax_inc_line_addr (line_delta, seg, to_frag, to_ofs, from_frag, from_ofs) | |
887 | int line_delta; | |
888 | segT seg; | |
889 | fragS *to_frag, *from_frag; | |
890 | addressT to_ofs, from_ofs; | |
891 | { | |
892 | symbolS *to_sym, *from_sym; | |
893 | expressionS expr; | |
894 | int max_chars; | |
6576f0b5 | 895 | |
220e750f RH |
896 | to_sym = symbol_new (fake_label_name, seg, to_ofs, to_frag); |
897 | from_sym = symbol_new (fake_label_name, seg, from_ofs, from_frag); | |
fac0d250 | 898 | |
220e750f RH |
899 | expr.X_op = O_subtract; |
900 | expr.X_add_symbol = to_sym; | |
901 | expr.X_op_symbol = from_sym; | |
902 | expr.X_add_number = 0; | |
fac0d250 | 903 | |
220e750f RH |
904 | /* The maximum size of the frag is the line delta with a maximum |
905 | sized address delta. */ | |
906 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 907 | |
220e750f RH |
908 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
909 | make_expr_symbol (&expr), line_delta, NULL); | |
910 | } | |
fac0d250 | 911 | |
220e750f RH |
912 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
913 | based on the current values of the symbols. It is called before | |
914 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 915 | |
220e750f RH |
916 | int |
917 | dwarf2dbg_estimate_size_before_relax (frag) | |
918 | fragS *frag; | |
919 | { | |
920 | offsetT addr_delta; | |
921 | int size; | |
fac0d250 | 922 | |
6386f3a7 | 923 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
220e750f | 924 | size = size_inc_line_addr (frag->fr_offset, addr_delta); |
fac0d250 | 925 | |
220e750f | 926 | frag->fr_subtype = size; |
fac0d250 | 927 | |
220e750f RH |
928 | return size; |
929 | } | |
930 | ||
931 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
932 | current values of the symbols. fr_subtype is the current length | |
933 | of the frag. This returns the change in frag length. */ | |
934 | ||
935 | int | |
936 | dwarf2dbg_relax_frag (frag) | |
937 | fragS *frag; | |
938 | { | |
939 | int old_size, new_size; | |
fac0d250 | 940 | |
220e750f RH |
941 | old_size = frag->fr_subtype; |
942 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 943 | |
220e750f | 944 | return new_size - old_size; |
fac0d250 RH |
945 | } |
946 | ||
220e750f RH |
947 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
948 | fill frag. This is called after all relaxation has been done. | |
949 | fr_subtype will be the desired length of the frag. */ | |
950 | ||
951 | void | |
952 | dwarf2dbg_convert_frag (frag) | |
953 | fragS *frag; | |
fac0d250 | 954 | { |
220e750f RH |
955 | offsetT addr_diff; |
956 | ||
6386f3a7 | 957 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 958 | |
220e750f RH |
959 | /* fr_var carries the max_chars that we created the fragment with. |
960 | fr_subtype carries the current expected length. We must, of | |
961 | course, have allocated enough memory earlier. */ | |
bccba5f0 | 962 | assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 963 | |
ee515fb7 | 964 | emit_inc_line_addr (frag->fr_offset, addr_diff, |
220e750f RH |
965 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); |
966 | ||
967 | frag->fr_fix += frag->fr_subtype; | |
968 | frag->fr_type = rs_fill; | |
969 | frag->fr_var = 0; | |
970 | frag->fr_offset = 0; | |
971 | } | |
972 | ||
973 | /* Generate .debug_line content for the chain of line number entries | |
974 | beginning at E, for segment SEG. */ | |
975 | ||
976 | static void | |
977 | process_entries (seg, e) | |
978 | segT seg; | |
979 | struct line_entry *e; | |
980 | { | |
981 | unsigned filenum = 1; | |
982 | unsigned line = 1; | |
983 | unsigned column = 0; | |
984 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_BEGIN_STMT : 0; | |
985 | fragS *frag = NULL; | |
986 | fragS *last_frag; | |
987 | addressT frag_ofs = 0; | |
988 | addressT last_frag_ofs; | |
989 | struct line_entry *next; | |
990 | ||
991 | while (e) | |
fac0d250 | 992 | { |
220e750f RH |
993 | int changed = 0; |
994 | ||
995 | if (filenum != e->loc.filenum) | |
fac0d250 | 996 | { |
220e750f RH |
997 | filenum = e->loc.filenum; |
998 | out_opcode (DW_LNS_set_file); | |
999 | out_uleb128 (filenum); | |
1000 | changed = 1; | |
1001 | } | |
1002 | ||
1003 | if (column != e->loc.column) | |
1004 | { | |
1005 | column = e->loc.column; | |
1006 | out_opcode (DW_LNS_set_column); | |
1007 | out_uleb128 (column); | |
1008 | changed = 1; | |
1009 | } | |
1010 | ||
1011 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_BEGIN_STMT) | |
1012 | { | |
1013 | flags = e->loc.flags; | |
1014 | out_opcode (DW_LNS_negate_stmt); | |
1015 | changed = 1; | |
1016 | } | |
1017 | ||
1018 | if (e->loc.flags & DWARF2_FLAG_BEGIN_BLOCK) | |
1019 | { | |
1020 | out_opcode (DW_LNS_set_basic_block); | |
1021 | changed = 1; | |
1022 | } | |
1023 | ||
fb81275c JM |
1024 | /* Don't try to optimize away redundant entries; gdb wants two |
1025 | entries for a function where the code starts on the same line as | |
1026 | the {, and there's no way to identify that case here. Trust gcc | |
1027 | to optimize appropriately. */ | |
1028 | if (1 /* line != e->loc.line || changed */) | |
220e750f RH |
1029 | { |
1030 | int line_delta = e->loc.line - line; | |
1031 | if (frag == NULL) | |
fac0d250 | 1032 | { |
220e750f RH |
1033 | out_set_addr (seg, e->frag, e->frag_ofs); |
1034 | out_inc_line_addr (line_delta, 0); | |
fac0d250 | 1035 | } |
220e750f RH |
1036 | else if (frag == e->frag) |
1037 | out_inc_line_addr (line_delta, e->frag_ofs - frag_ofs); | |
1038 | else | |
1039 | relax_inc_line_addr (line_delta, seg, e->frag, e->frag_ofs, | |
1040 | frag, frag_ofs); | |
1041 | ||
1042 | frag = e->frag; | |
1043 | frag_ofs = e->frag_ofs; | |
1044 | line = e->loc.line; | |
fac0d250 | 1045 | } |
220e750f RH |
1046 | else if (frag == NULL) |
1047 | { | |
1048 | out_set_addr (seg, e->frag, e->frag_ofs); | |
1049 | frag = e->frag; | |
1050 | frag_ofs = e->frag_ofs; | |
1051 | } | |
1052 | ||
1053 | next = e->next; | |
1054 | free (e); | |
1055 | e = next; | |
fac0d250 | 1056 | } |
353e2c69 | 1057 | |
220e750f RH |
1058 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
1059 | last_frag = last_frag_for_seg (seg); | |
1060 | last_frag_ofs = get_frag_fix (last_frag); | |
1061 | if (frag == last_frag) | |
1062 | out_inc_line_addr (INT_MAX, last_frag_ofs - frag_ofs); | |
1063 | else | |
ee515fb7 | 1064 | relax_inc_line_addr (INT_MAX, seg, last_frag, last_frag_ofs, |
220e750f | 1065 | frag, frag_ofs); |
fac0d250 RH |
1066 | } |
1067 | ||
220e750f RH |
1068 | /* Emit the directory and file tables for .debug_line. */ |
1069 | ||
fac0d250 | 1070 | static void |
220e750f | 1071 | out_file_list () |
fac0d250 RH |
1072 | { |
1073 | size_t size; | |
1074 | char *cp; | |
220e750f RH |
1075 | unsigned int i; |
1076 | ||
a7ed1ca2 NC |
1077 | /* Emit directory list. */ |
1078 | for (i = 1; i < dirs_in_use; ++i) | |
1079 | { | |
1080 | size = strlen (dirs[i]) + 1; | |
1081 | cp = frag_more (size); | |
1082 | memcpy (cp, dirs[i], size); | |
1083 | } | |
1084 | /* Terminate it. */ | |
220e750f | 1085 | out_byte ('\0'); |
fac0d250 | 1086 | |
220e750f | 1087 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1088 | { |
249e3833 RH |
1089 | if (files[i].filename == NULL) |
1090 | { | |
0e389e77 | 1091 | as_bad (_("unassigned file number %ld"), (long) i); |
249e3833 RH |
1092 | continue; |
1093 | } | |
1094 | ||
220e750f | 1095 | size = strlen (files[i].filename) + 1; |
fac0d250 | 1096 | cp = frag_more (size); |
220e750f | 1097 | memcpy (cp, files[i].filename, size); |
fac0d250 | 1098 | |
220e750f | 1099 | out_uleb128 (files[i].dir); /* directory number */ |
fac0d250 RH |
1100 | out_uleb128 (0); /* last modification timestamp */ |
1101 | out_uleb128 (0); /* filesize */ | |
1102 | } | |
353e2c69 KH |
1103 | |
1104 | /* Terminate filename list. */ | |
1105 | out_byte (0); | |
fac0d250 RH |
1106 | } |
1107 | ||
220e750f RH |
1108 | /* Emit the collected .debug_line data. */ |
1109 | ||
1110 | static void | |
1111 | out_debug_line (line_seg) | |
1112 | segT line_seg; | |
1113 | { | |
1114 | expressionS expr; | |
1115 | symbolS *line_start; | |
1116 | symbolS *prologue_end; | |
1117 | symbolS *line_end; | |
1118 | struct line_seg *s; | |
14e777e0 KB |
1119 | enum dwarf2_format d2f; |
1120 | int sizeof_offset; | |
220e750f RH |
1121 | |
1122 | subseg_set (line_seg, 0); | |
1123 | ||
1124 | line_start = symbol_new_now (); | |
1125 | prologue_end = symbol_make (fake_label_name); | |
1126 | line_end = symbol_make (fake_label_name); | |
1127 | ||
1128 | /* Total length of the information for this compilation unit. */ | |
1129 | expr.X_op = O_subtract; | |
1130 | expr.X_add_symbol = line_end; | |
1131 | expr.X_op_symbol = line_start; | |
14e777e0 KB |
1132 | |
1133 | d2f = DWARF2_FORMAT (); | |
1134 | if (d2f == dwarf2_format_32bit) | |
1135 | { | |
1136 | expr.X_add_number = -4; | |
1137 | emit_expr (&expr, 4); | |
1138 | sizeof_offset = 4; | |
1139 | } | |
1140 | else if (d2f == dwarf2_format_64bit) | |
1141 | { | |
1142 | expr.X_add_number = -12; | |
1143 | out_four (-1); | |
1144 | emit_expr (&expr, 8); | |
1145 | sizeof_offset = 8; | |
1146 | } | |
1147 | else if (d2f == dwarf2_format_64bit_irix) | |
1148 | { | |
1149 | expr.X_add_number = -8; | |
1150 | emit_expr (&expr, 8); | |
1151 | sizeof_offset = 8; | |
1152 | } | |
1153 | else | |
1154 | { | |
1155 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1156 | } | |
220e750f RH |
1157 | |
1158 | /* Version. */ | |
1159 | out_two (2); | |
1160 | ||
1161 | /* Length of the prologue following this length. */ | |
1162 | expr.X_op = O_subtract; | |
1163 | expr.X_add_symbol = prologue_end; | |
1164 | expr.X_op_symbol = line_start; | |
1165 | expr.X_add_number = - (4 + 2 + 4); | |
14e777e0 | 1166 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1167 | |
1168 | /* Parameters of the state machine. */ | |
1169 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1170 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1171 | out_byte (DWARF2_LINE_BASE); | |
1172 | out_byte (DWARF2_LINE_RANGE); | |
1173 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1174 | ||
1175 | /* Standard opcode lengths. */ | |
1176 | out_byte (0); /* DW_LNS_copy */ | |
1177 | out_byte (1); /* DW_LNS_advance_pc */ | |
1178 | out_byte (1); /* DW_LNS_advance_line */ | |
1179 | out_byte (1); /* DW_LNS_set_file */ | |
1180 | out_byte (1); /* DW_LNS_set_column */ | |
1181 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1182 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1183 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1184 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
1185 | ||
1186 | out_file_list (); | |
1187 | ||
1188 | set_symbol_value_now (prologue_end); | |
1189 | ||
1190 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1191 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1192 | process_entries (s->seg, s->head->head); |
1193 | ||
1194 | set_symbol_value_now (line_end); | |
1195 | } | |
1196 | ||
1197 | /* Emit data for .debug_aranges. */ | |
1198 | ||
58b5739a | 1199 | static void |
220e750f RH |
1200 | out_debug_aranges (aranges_seg, info_seg) |
1201 | segT aranges_seg; | |
1202 | segT info_seg; | |
fac0d250 | 1203 | { |
220e750f RH |
1204 | unsigned int addr_size = sizeof_address; |
1205 | addressT size, skip; | |
1206 | struct line_seg *s; | |
1207 | expressionS expr; | |
1208 | char *p; | |
fac0d250 | 1209 | |
220e750f | 1210 | size = 4 + 2 + 4 + 1 + 1; |
fac0d250 | 1211 | |
ee515fb7 KH |
1212 | skip = 2 * addr_size - (size & (2 * addr_size - 1)); |
1213 | if (skip == 2 * addr_size) | |
220e750f RH |
1214 | skip = 0; |
1215 | size += skip; | |
fac0d250 | 1216 | |
ee515fb7 KH |
1217 | for (s = all_segs; s; s = s->next) |
1218 | size += 2 * addr_size; | |
fac0d250 | 1219 | |
ee515fb7 | 1220 | size += 2 * addr_size; |
fac0d250 | 1221 | |
220e750f | 1222 | subseg_set (aranges_seg, 0); |
fac0d250 | 1223 | |
220e750f RH |
1224 | /* Length of the compilation unit. */ |
1225 | out_four (size - 4); | |
fac0d250 | 1226 | |
220e750f RH |
1227 | /* Version. */ |
1228 | out_two (2); | |
4dc7ead9 | 1229 | |
220e750f | 1230 | /* Offset to .debug_info. */ |
6174d9c8 RH |
1231 | /* ??? sizeof_offset */ |
1232 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4); | |
220e750f RH |
1233 | |
1234 | /* Size of an address (offset portion). */ | |
1235 | out_byte (addr_size); | |
1236 | ||
1237 | /* Size of a segment descriptor. */ | |
1238 | out_byte (0); | |
1239 | ||
1240 | /* Align the header. */ | |
1241 | if (skip) | |
ee515fb7 | 1242 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1243 | |
ee515fb7 | 1244 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1245 | { |
1246 | fragS *frag; | |
1247 | symbolS *beg, *end; | |
1248 | ||
1249 | frag = first_frag_for_seg (s->seg); | |
1250 | beg = symbol_new (fake_label_name, s->seg, 0, frag); | |
1251 | s->text_start = beg; | |
1252 | ||
1253 | frag = last_frag_for_seg (s->seg); | |
1254 | end = symbol_new (fake_label_name, s->seg, get_frag_fix (frag), frag); | |
1255 | s->text_end = end; | |
1256 | ||
1257 | expr.X_op = O_symbol; | |
1258 | expr.X_add_symbol = beg; | |
1259 | expr.X_add_number = 0; | |
1260 | emit_expr (&expr, addr_size); | |
1261 | ||
1262 | expr.X_op = O_subtract; | |
1263 | expr.X_add_symbol = end; | |
1264 | expr.X_op_symbol = beg; | |
1265 | expr.X_add_number = 0; | |
1266 | emit_expr (&expr, addr_size); | |
1267 | } | |
4dc7ead9 | 1268 | |
220e750f RH |
1269 | p = frag_more (2 * addr_size); |
1270 | md_number_to_chars (p, 0, addr_size); | |
1271 | md_number_to_chars (p + addr_size, 0, addr_size); | |
4dc7ead9 RH |
1272 | } |
1273 | ||
220e750f RH |
1274 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1275 | sync with out_debug_info below. */ | |
fac0d250 | 1276 | |
220e750f RH |
1277 | static void |
1278 | out_debug_abbrev (abbrev_seg) | |
1279 | segT abbrev_seg; | |
1280 | { | |
1281 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1282 | |
220e750f RH |
1283 | out_uleb128 (1); |
1284 | out_uleb128 (DW_TAG_compile_unit); | |
1285 | out_byte (DW_CHILDREN_no); | |
1286 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1287 | if (all_segs->next == NULL) | |
4dc7ead9 | 1288 | { |
220e750f RH |
1289 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1290 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1291 | } | |
48b91938 | 1292 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1293 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1294 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1295 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1296 | out_abbrev (0, 0); | |
a987bfc9 RH |
1297 | |
1298 | /* Terminate the abbreviations for this compilation unit. */ | |
1299 | out_byte (0); | |
220e750f | 1300 | } |
4dc7ead9 | 1301 | |
220e750f | 1302 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1303 | |
220e750f RH |
1304 | static void |
1305 | out_debug_info (info_seg, abbrev_seg, line_seg) | |
1306 | segT info_seg; | |
1307 | segT abbrev_seg; | |
1308 | segT line_seg; | |
1309 | { | |
1310 | char producer[128]; | |
1311 | char *comp_dir; | |
1312 | expressionS expr; | |
1313 | symbolS *info_start; | |
1314 | symbolS *info_end; | |
1315 | char *p; | |
1316 | int len; | |
14e777e0 KB |
1317 | enum dwarf2_format d2f; |
1318 | int sizeof_offset; | |
4dc7ead9 | 1319 | |
220e750f | 1320 | subseg_set (info_seg, 0); |
4dc7ead9 | 1321 | |
ee515fb7 | 1322 | info_start = symbol_new_now (); |
220e750f | 1323 | info_end = symbol_make (fake_label_name); |
4dc7ead9 | 1324 | |
220e750f RH |
1325 | /* Compilation Unit length. */ |
1326 | expr.X_op = O_subtract; | |
1327 | expr.X_add_symbol = info_end; | |
1328 | expr.X_op_symbol = info_start; | |
14e777e0 KB |
1329 | |
1330 | d2f = DWARF2_FORMAT (); | |
1331 | if (d2f == dwarf2_format_32bit) | |
1332 | { | |
1333 | expr.X_add_number = -4; | |
1334 | emit_expr (&expr, 4); | |
1335 | sizeof_offset = 4; | |
1336 | } | |
1337 | else if (d2f == dwarf2_format_64bit) | |
1338 | { | |
1339 | expr.X_add_number = -12; | |
1340 | out_four (-1); | |
1341 | emit_expr (&expr, 8); | |
1342 | sizeof_offset = 8; | |
1343 | } | |
1344 | else if (d2f == dwarf2_format_64bit_irix) | |
1345 | { | |
1346 | expr.X_add_number = -8; | |
1347 | emit_expr (&expr, 8); | |
1348 | sizeof_offset = 8; | |
1349 | } | |
1350 | else | |
1351 | { | |
1352 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1353 | } | |
4dc7ead9 | 1354 | |
220e750f RH |
1355 | /* DWARF version. */ |
1356 | out_two (2); | |
4dc7ead9 | 1357 | |
220e750f | 1358 | /* .debug_abbrev offset */ |
6174d9c8 | 1359 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1360 | |
220e750f RH |
1361 | /* Target address size. */ |
1362 | out_byte (sizeof_address); | |
fac0d250 | 1363 | |
220e750f RH |
1364 | /* DW_TAG_compile_unit DIE abbrev */ |
1365 | out_uleb128 (1); | |
fac0d250 | 1366 | |
220e750f | 1367 | /* DW_AT_stmt_list */ |
6174d9c8 RH |
1368 | /* ??? sizeof_offset */ |
1369 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4); | |
fac0d250 | 1370 | |
220e750f RH |
1371 | /* These two attributes may only be emitted if all of the code is |
1372 | contiguous. Multiple sections are not that. */ | |
1373 | if (all_segs->next == NULL) | |
58b5739a | 1374 | { |
220e750f RH |
1375 | /* DW_AT_low_pc */ |
1376 | expr.X_op = O_symbol; | |
1377 | expr.X_add_symbol = all_segs->text_start; | |
1378 | expr.X_add_number = 0; | |
1379 | emit_expr (&expr, sizeof_address); | |
1380 | ||
1381 | /* DW_AT_high_pc */ | |
1382 | expr.X_op = O_symbol; | |
1383 | expr.X_add_symbol = all_segs->text_end; | |
1384 | expr.X_add_number = 0; | |
1385 | emit_expr (&expr, sizeof_address); | |
58b5739a RH |
1386 | } |
1387 | ||
48b91938 RH |
1388 | /* DW_AT_name. We don't have the actual file name that was present |
1389 | on the command line, so assume files[1] is the main input file. | |
1390 | We're not supposed to get called unless at least one line number | |
1391 | entry was emitted, so this should always be defined. */ | |
1392 | if (!files || files_in_use < 1) | |
1393 | abort (); | |
a7ed1ca2 NC |
1394 | if (files[1].dir) |
1395 | { | |
1396 | len = strlen (dirs[files[1].dir]); | |
1397 | p = frag_more (len + 1); | |
1398 | memcpy (p, dirs[files[1].dir], len); | |
1399 | p[len] = '/'; | |
1400 | } | |
48b91938 RH |
1401 | len = strlen (files[1].filename) + 1; |
1402 | p = frag_more (len); | |
1403 | memcpy (p, files[1].filename, len); | |
1404 | ||
220e750f RH |
1405 | /* DW_AT_comp_dir */ |
1406 | comp_dir = getpwd (); | |
1407 | len = strlen (comp_dir) + 1; | |
1408 | p = frag_more (len); | |
1409 | memcpy (p, comp_dir, len); | |
fac0d250 | 1410 | |
220e750f RH |
1411 | /* DW_AT_producer */ |
1412 | sprintf (producer, "GNU AS %s", VERSION); | |
1413 | len = strlen (producer) + 1; | |
1414 | p = frag_more (len); | |
1415 | memcpy (p, producer, len); | |
fac0d250 | 1416 | |
220e750f RH |
1417 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1418 | dwarf2 draft has no standard code for assembler. */ | |
1419 | out_two (DW_LANG_Mips_Assembler); | |
1420 | ||
1421 | set_symbol_value_now (info_end); | |
fac0d250 RH |
1422 | } |
1423 | ||
1424 | void | |
220e750f | 1425 | dwarf2_finish () |
fac0d250 | 1426 | { |
220e750f RH |
1427 | segT line_seg; |
1428 | struct line_seg *s; | |
fac0d250 | 1429 | |
70ee4658 DJ |
1430 | /* We don't need to do anything unless: |
1431 | - Some debug information was recorded via .file/.loc | |
1432 | - or, we are generating DWARF2 information ourself (--gdwarf2) | |
1433 | - or, there is a user-provided .debug_info section which could | |
1434 | reference the file table in the .debug_line section we generate | |
1435 | below. */ | |
1436 | if (all_segs == NULL | |
1437 | && debug_type != DEBUG_DWARF2 | |
1438 | && bfd_get_section_by_name (stdoutput, ".debug_info") == NULL) | |
220e750f | 1439 | return; |
fac0d250 | 1440 | |
220e750f | 1441 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1442 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1443 | |
220e750f RH |
1444 | /* Create and switch to the line number section. */ |
1445 | line_seg = subseg_new (".debug_line", 0); | |
220e750f | 1446 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY); |
fac0d250 | 1447 | |
220e750f | 1448 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1449 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1450 | { |
220e750f RH |
1451 | struct line_subseg *ss = s->head; |
1452 | struct line_entry **ptail = ss->ptail; | |
1453 | ||
1454 | while ((ss = ss->next) != NULL) | |
1455 | { | |
1456 | *ptail = ss->head; | |
1457 | ptail = ss->ptail; | |
1458 | } | |
fac0d250 | 1459 | } |
85a39694 | 1460 | |
220e750f | 1461 | out_debug_line (line_seg); |
85a39694 | 1462 | |
220e750f RH |
1463 | /* If this is assembler generated line info, we need .debug_info |
1464 | and .debug_abbrev sections as well. */ | |
45c500fa | 1465 | if (all_segs != NULL && debug_type == DEBUG_DWARF2) |
220e750f RH |
1466 | { |
1467 | segT abbrev_seg; | |
1468 | segT info_seg; | |
1469 | segT aranges_seg; | |
4dc7ead9 | 1470 | |
220e750f RH |
1471 | info_seg = subseg_new (".debug_info", 0); |
1472 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1473 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1474 | |
220e750f RH |
1475 | bfd_set_section_flags (stdoutput, info_seg, SEC_READONLY); |
1476 | bfd_set_section_flags (stdoutput, abbrev_seg, SEC_READONLY); | |
1477 | bfd_set_section_flags (stdoutput, aranges_seg, SEC_READONLY); | |
ef99799a | 1478 | |
ee515fb7 | 1479 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1480 | |
220e750f RH |
1481 | out_debug_aranges (aranges_seg, info_seg); |
1482 | out_debug_abbrev (abbrev_seg); | |
1483 | out_debug_info (info_seg, abbrev_seg, line_seg); | |
1484 | } | |
85a39694 | 1485 | } |
92eb7b32 L |
1486 | |
1487 | #else | |
1488 | void | |
1489 | dwarf2_finish () | |
1490 | { | |
1491 | } | |
1492 | ||
1493 | int | |
1494 | dwarf2dbg_estimate_size_before_relax (frag) | |
1495 | fragS *frag ATTRIBUTE_UNUSED; | |
1496 | { | |
1497 | as_fatal (_("dwarf2 is not supported for this object file format")); | |
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | int | |
1502 | dwarf2dbg_relax_frag (frag) | |
1503 | fragS *frag ATTRIBUTE_UNUSED; | |
1504 | { | |
1505 | as_fatal (_("dwarf2 is not supported for this object file format")); | |
1506 | return 0; | |
1507 | } | |
1508 | ||
1509 | void | |
1510 | dwarf2dbg_convert_frag (frag) | |
1511 | fragS *frag ATTRIBUTE_UNUSED; | |
1512 | { | |
1513 | as_fatal (_("dwarf2 is not supported for this object file format")); | |
1514 | } | |
1515 | ||
1516 | void | |
1517 | dwarf2_emit_insn (size) | |
1518 | int size ATTRIBUTE_UNUSED; | |
1519 | { | |
1520 | } | |
1521 | ||
70658493 | 1522 | char * |
92eb7b32 L |
1523 | dwarf2_directive_file (dummy) |
1524 | int dummy ATTRIBUTE_UNUSED; | |
1525 | { | |
3737d051 | 1526 | s_app_file (0); |
70658493 | 1527 | return NULL; |
92eb7b32 L |
1528 | } |
1529 | ||
1530 | void | |
1531 | dwarf2_directive_loc (dummy) | |
1532 | int dummy ATTRIBUTE_UNUSED; | |
1533 | { | |
1534 | as_fatal (_("dwarf2 is not supported for this object file format")); | |
1535 | } | |
1536 | #endif /* BFD_ASSEMBLER */ |