]>
Commit | Line | Data |
---|---|---|
fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
2da5c037 AM |
2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
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 | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
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" | |
27 | .loc FILENO LINENO [COLUMN] | |
bd0eb99b RH |
28 | .loc basic_block |
29 | .loc prologue_end | |
30 | .loc epilogue_begin | |
31 | .loc is_stmt [VALUE] | |
32 | .loc isa [VALUE] | |
33 | */ | |
fac0d250 RH |
34 | |
35 | #include "ansidecl.h" | |
fac0d250 | 36 | #include "as.h" |
bd0eb99b | 37 | #include "safe-ctype.h" |
92eb7b32 | 38 | |
42dbf88c NC |
39 | #ifdef HAVE_LIMITS_H |
40 | #include <limits.h> | |
92625c16 | 41 | #else |
6717891c NC |
42 | #ifdef HAVE_SYS_PARAM_H |
43 | #include <sys/param.h> | |
44 | #endif | |
6256f9dd | 45 | #ifndef INT_MAX |
ee515fb7 | 46 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 47 | #endif |
b8f080d6 | 48 | #endif |
42dbf88c | 49 | |
70658493 | 50 | #include "dwarf2dbg.h" |
a7ed1ca2 | 51 | #include <filenames.h> |
70658493 | 52 | |
14e777e0 | 53 | #ifndef DWARF2_FORMAT |
9605f328 | 54 | # define DWARF2_FORMAT() dwarf2_format_32bit |
14e777e0 KB |
55 | #endif |
56 | ||
9605f328 | 57 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 58 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
59 | #endif |
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 | |
bd0eb99b RH |
76 | out_debug_line(). */ |
77 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
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 | ||
bd0eb99b | 96 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
97 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
98 | ||
cb30237e | 99 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
100 | #define SPECIAL_LINE(op) \ |
101 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
102 | ||
103 | /* Given a special op, return the address skip amount (in units of | |
104 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
105 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
106 | ||
cb30237e | 107 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
108 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
109 | ||
ee515fb7 | 110 | struct line_entry { |
220e750f RH |
111 | struct line_entry *next; |
112 | fragS *frag; | |
113 | addressT frag_ofs; | |
114 | struct dwarf2_line_info loc; | |
e6c774b4 | 115 | }; |
fac0d250 | 116 | |
ee515fb7 | 117 | struct line_subseg { |
220e750f RH |
118 | struct line_subseg *next; |
119 | subsegT subseg; | |
120 | struct line_entry *head; | |
121 | struct line_entry **ptail; | |
122 | }; | |
353e2c69 | 123 | |
ee515fb7 | 124 | struct line_seg { |
220e750f RH |
125 | struct line_seg *next; |
126 | segT seg; | |
127 | struct line_subseg *head; | |
128 | symbolS *text_start; | |
129 | symbolS *text_end; | |
130 | }; | |
131 | ||
132 | /* Collects data for all line table entries during assembly. */ | |
133 | static struct line_seg *all_segs; | |
134 | ||
ee515fb7 | 135 | struct file_entry { |
a7ed1ca2 | 136 | const char *filename; |
220e750f RH |
137 | unsigned int dir; |
138 | }; | |
139 | ||
140 | /* Table of files used by .debug_line. */ | |
141 | static struct file_entry *files; | |
142 | static unsigned int files_in_use; | |
143 | static unsigned int files_allocated; | |
144 | ||
a7ed1ca2 NC |
145 | /* Table of directories used by .debug_line. */ |
146 | static char **dirs; | |
147 | static unsigned int dirs_in_use; | |
148 | static unsigned int dirs_allocated; | |
149 | ||
b34976b6 | 150 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 151 | doing work when there's nothing to do. */ |
b34976b6 | 152 | static bfd_boolean loc_directive_seen; |
220e750f RH |
153 | |
154 | /* Current location as indicated by the most recent .loc directive. */ | |
bd0eb99b RH |
155 | static struct dwarf2_line_info current = { |
156 | 1, 1, 0, 0, | |
157 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0 | |
158 | }; | |
220e750f | 159 | |
220e750f RH |
160 | /* The size of an address on the target. */ |
161 | static unsigned int sizeof_address; | |
162 | \f | |
a2e22468 KH |
163 | static struct line_subseg *get_line_subseg (segT, subsegT); |
164 | static unsigned int get_filenum (const char *, unsigned int); | |
165 | static struct frag *first_frag_for_seg (segT); | |
166 | static struct frag *last_frag_for_seg (segT); | |
167 | static void out_byte (int); | |
168 | static void out_opcode (int); | |
169 | static void out_two (int); | |
170 | static void out_four (int); | |
171 | static void out_abbrev (int, int); | |
172 | static void out_uleb128 (addressT); | |
173 | static offsetT get_frag_fix (fragS *); | |
174 | static void out_set_addr (segT, fragS *, addressT); | |
175 | static int size_inc_line_addr (int, addressT); | |
176 | static void emit_inc_line_addr (int, addressT, char *, int); | |
177 | static void out_inc_line_addr (int, addressT); | |
178 | static void relax_inc_line_addr (int, segT, fragS *, addressT, | |
179 | fragS *, addressT); | |
180 | static void process_entries (segT, struct line_entry *); | |
181 | static void out_file_list (void); | |
182 | static void out_debug_line (segT); | |
183 | static void out_debug_aranges (segT, segT); | |
184 | static void out_debug_abbrev (segT); | |
185 | static void out_debug_info (segT, segT, segT); | |
220e750f | 186 | \f |
c5c0a210 AM |
187 | #ifndef TC_DWARF2_EMIT_OFFSET |
188 | # define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset | |
a2e22468 | 189 | static void generic_dwarf2_emit_offset (symbolS *, unsigned int); |
c5c0a210 | 190 | |
6174d9c8 RH |
191 | /* Create an offset to .dwarf2_*. */ |
192 | ||
193 | static void | |
a2e22468 | 194 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 RH |
195 | { |
196 | expressionS expr; | |
197 | ||
198 | expr.X_op = O_symbol; | |
199 | expr.X_add_symbol = symbol; | |
200 | expr.X_add_number = 0; | |
201 | emit_expr (&expr, size); | |
202 | } | |
c5c0a210 | 203 | #endif |
6174d9c8 | 204 | |
220e750f RH |
205 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
206 | ||
207 | static struct line_subseg * | |
a2e22468 | 208 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
209 | { |
210 | static segT last_seg; | |
211 | static subsegT last_subseg; | |
212 | static struct line_subseg *last_line_subseg; | |
213 | ||
214 | struct line_seg *s; | |
215 | struct line_subseg **pss, *ss; | |
fac0d250 | 216 | |
220e750f RH |
217 | if (seg == last_seg && subseg == last_subseg) |
218 | return last_line_subseg; | |
219 | ||
ee515fb7 | 220 | for (s = all_segs; s; s = s->next) |
220e750f RH |
221 | if (s->seg == seg) |
222 | goto found_seg; | |
223 | ||
224 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
225 | s->next = all_segs; | |
226 | s->seg = seg; | |
227 | s->head = NULL; | |
228 | all_segs = s; | |
229 | ||
230 | found_seg: | |
231 | for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) | |
fac0d250 | 232 | { |
220e750f | 233 | if (ss->subseg == subseg) |
ee515fb7 | 234 | goto found_subseg; |
220e750f RH |
235 | if (ss->subseg > subseg) |
236 | break; | |
fac0d250 | 237 | } |
220e750f RH |
238 | |
239 | ss = (struct line_subseg *) xmalloc (sizeof (*ss)); | |
240 | ss->next = *pss; | |
241 | ss->subseg = subseg; | |
242 | ss->head = NULL; | |
243 | ss->ptail = &ss->head; | |
244 | *pss = ss; | |
245 | ||
246 | found_subseg: | |
247 | last_seg = seg; | |
248 | last_subseg = subseg; | |
249 | last_line_subseg = ss; | |
250 | ||
251 | return ss; | |
fac0d250 RH |
252 | } |
253 | ||
436d9e46 | 254 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 255 | |
220e750f | 256 | void |
a2e22468 | 257 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 258 | { |
220e750f RH |
259 | struct line_subseg *ss; |
260 | struct line_entry *e; | |
1ea5c325 MS |
261 | static unsigned int line = -1; |
262 | static unsigned int filenum = -1; | |
220e750f RH |
263 | |
264 | /* Early out for as-yet incomplete location information. */ | |
265 | if (loc->filenum == 0 || loc->line == 0) | |
266 | return; | |
267 | ||
ffa554ed GK |
268 | /* Don't emit sequences of line symbols for the same line when the |
269 | symbols apply to assembler code. It is necessary to emit | |
270 | duplicate line symbols when a compiler asks for them, because GDB | |
271 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 272 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 273 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
274 | return; |
275 | ||
276 | line = loc->line; | |
277 | filenum = loc->filenum; | |
278 | ||
220e750f RH |
279 | e = (struct line_entry *) xmalloc (sizeof (*e)); |
280 | e->next = NULL; | |
281 | e->frag = frag_now; | |
282 | e->frag_ofs = ofs; | |
283 | e->loc = *loc; | |
284 | ||
285 | ss = get_line_subseg (now_seg, now_subseg); | |
286 | *ss->ptail = e; | |
287 | ss->ptail = &e->next; | |
288 | } | |
fac0d250 | 289 | |
220e750f | 290 | void |
a2e22468 | 291 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
292 | { |
293 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 294 | { |
220e750f RH |
295 | char *filename; |
296 | as_where (&filename, &line->line); | |
a7ed1ca2 | 297 | line->filenum = get_filenum (filename, 0); |
220e750f | 298 | line->column = 0; |
bd0eb99b | 299 | line->flags = DWARF2_FLAG_IS_STMT; |
fac0d250 | 300 | } |
220e750f RH |
301 | else |
302 | *line = current; | |
fac0d250 RH |
303 | } |
304 | ||
220e750f RH |
305 | /* Called for each machine instruction, or relatively atomic group of |
306 | machine instructions (ie built-in macro). The instruction or group | |
307 | is SIZE bytes in length. If dwarf2 line number generation is called | |
308 | for, emit a line statement appropriately. */ | |
353e2c69 | 309 | |
220e750f | 310 | void |
a2e22468 | 311 | dwarf2_emit_insn (int size) |
fac0d250 | 312 | { |
220e750f | 313 | struct dwarf2_line_info loc; |
fac0d250 | 314 | |
b6675117 | 315 | if (loc_directive_seen) |
1080e97d L |
316 | { |
317 | /* Use the last location established by a .loc directive, not | |
318 | the value returned by dwarf2_where(). That calls as_where() | |
319 | which will return either the logical input file name (foo.c) | |
320 | or the physical input file name (foo.s) and not the file name | |
321 | specified in the most recent .loc directive (eg foo.h). */ | |
322 | loc = current; | |
323 | ||
324 | /* Unless we generate DWARF2 debugging information for each | |
325 | assembler line, we only emit one line symbol for one LOC. */ | |
326 | if (debug_type != DEBUG_DWARF2) | |
b34976b6 | 327 | loc_directive_seen = FALSE; |
1080e97d | 328 | } |
b6675117 | 329 | else if (debug_type != DEBUG_DWARF2) |
220e750f | 330 | return; |
b6675117 | 331 | else |
bd0eb99b | 332 | dwarf2_where (&loc); |
b6675117 | 333 | |
220e750f | 334 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
bd0eb99b RH |
335 | |
336 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
337 | | DWARF2_FLAG_PROLOGUE_END | |
338 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
220e750f | 339 | } |
fac0d250 | 340 | |
a7ed1ca2 NC |
341 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
342 | allocate it on that file table slot, otherwise return the first | |
343 | empty one. */ | |
220e750f RH |
344 | |
345 | static unsigned int | |
a2e22468 | 346 | get_filenum (const char *filename, unsigned int num) |
220e750f | 347 | { |
a7ed1ca2 NC |
348 | static unsigned int last_used, last_used_dir_len; |
349 | const char *file; | |
350 | size_t dir_len; | |
351 | unsigned int i, dir; | |
220e750f | 352 | |
a7ed1ca2 NC |
353 | if (num == 0 && last_used) |
354 | { | |
355 | if (! files[last_used].dir | |
356 | && strcmp (filename, files[last_used].filename) == 0) | |
357 | return last_used; | |
358 | if (files[last_used].dir | |
359 | && strncmp (filename, dirs[files[last_used].dir], | |
360 | last_used_dir_len) == 0 | |
361 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
362 | && strcmp (filename + last_used_dir_len + 1, | |
363 | files[last_used].filename) == 0) | |
364 | return last_used; | |
365 | } | |
220e750f | 366 | |
a7ed1ca2 NC |
367 | file = lbasename (filename); |
368 | /* Don't make empty string from / or A: from A:/ . */ | |
369 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
370 | if (file <= filename + 3) | |
371 | file = filename; | |
372 | #else | |
373 | if (file == filename + 1) | |
374 | file = filename; | |
375 | #endif | |
376 | dir_len = file - filename; | |
377 | ||
378 | dir = 0; | |
379 | if (dir_len) | |
380 | { | |
381 | --dir_len; | |
382 | for (dir = 1; dir < dirs_in_use; ++dir) | |
4dde8e61 | 383 | if (strncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
384 | && dirs[dir][dir_len] == '\0') |
385 | break; | |
386 | ||
387 | if (dir >= dirs_in_use) | |
388 | { | |
389 | if (dir >= dirs_allocated) | |
390 | { | |
391 | dirs_allocated = dir + 32; | |
392 | dirs = (char **) | |
393 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
394 | } | |
395 | ||
396 | dirs[dir] = xmalloc (dir_len + 1); | |
397 | memcpy (dirs[dir], filename, dir_len); | |
398 | dirs[dir][dir_len] = '\0'; | |
399 | dirs_in_use = dir + 1; | |
400 | } | |
401 | } | |
402 | ||
403 | if (num == 0) | |
404 | { | |
405 | for (i = 1; i < files_in_use; ++i) | |
406 | if (files[i].dir == dir | |
88b4ca40 | 407 | && files[i].filename |
a7ed1ca2 NC |
408 | && strcmp (file, files[i].filename) == 0) |
409 | { | |
410 | last_used = i; | |
411 | last_used_dir_len = dir_len; | |
412 | return i; | |
413 | } | |
414 | } | |
415 | else | |
416 | i = num; | |
220e750f RH |
417 | |
418 | if (i >= files_allocated) | |
fac0d250 | 419 | { |
249e3833 RH |
420 | unsigned int old = files_allocated; |
421 | ||
220e750f RH |
422 | files_allocated = i + 32; |
423 | files = (struct file_entry *) | |
ee515fb7 | 424 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
425 | |
426 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
427 | } |
428 | ||
a7ed1ca2 NC |
429 | files[i].filename = num ? file : xstrdup (file); |
430 | files[i].dir = dir; | |
220e750f RH |
431 | files_in_use = i + 1; |
432 | last_used = i; | |
a7ed1ca2 | 433 | last_used_dir_len = dir_len; |
220e750f RH |
434 | |
435 | return i; | |
436 | } | |
fac0d250 | 437 | |
ecb4347a DJ |
438 | /* Handle two forms of .file directive: |
439 | - Pass .file "source.c" to s_app_file | |
440 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 441 | |
ecb4347a DJ |
442 | If an entry is added to the file table, return a pointer to the filename. */ |
443 | ||
444 | char * | |
a2e22468 | 445 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
446 | { |
447 | offsetT num; | |
e46d99eb | 448 | char *filename; |
220e750f RH |
449 | int filename_len; |
450 | ||
451 | /* Continue to accept a bare string and pass it off. */ | |
452 | SKIP_WHITESPACE (); | |
453 | if (*input_line_pointer == '"') | |
fac0d250 | 454 | { |
220e750f | 455 | s_app_file (0); |
ecb4347a | 456 | return NULL; |
fac0d250 RH |
457 | } |
458 | ||
220e750f RH |
459 | num = get_absolute_expression (); |
460 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
461 | if (filename == NULL) |
462 | return NULL; | |
220e750f RH |
463 | demand_empty_rest_of_line (); |
464 | ||
249e3833 | 465 | if (num < 1) |
fac0d250 | 466 | { |
0e389e77 | 467 | as_bad (_("file number less than one")); |
ecb4347a | 468 | return NULL; |
fac0d250 RH |
469 | } |
470 | ||
0e1a166b | 471 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 472 | { |
0e389e77 | 473 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 474 | return NULL; |
249e3833 | 475 | } |
220e750f | 476 | |
a7ed1ca2 | 477 | get_filenum (filename, num); |
ecb4347a DJ |
478 | |
479 | return filename; | |
fac0d250 RH |
480 | } |
481 | ||
220e750f | 482 | void |
a2e22468 | 483 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 484 | { |
220e750f | 485 | SKIP_WHITESPACE (); |
bd0eb99b | 486 | if (ISALPHA (*input_line_pointer)) |
220e750f | 487 | { |
bd0eb99b RH |
488 | char *p, c; |
489 | offsetT value; | |
490 | ||
491 | p = input_line_pointer; | |
492 | c = get_symbol_end (); | |
493 | ||
494 | if (strcmp (p, "basic_block") == 0) | |
495 | { | |
496 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
497 | *input_line_pointer = c; | |
498 | } | |
499 | else if (strcmp (p, "prologue_end") == 0) | |
500 | { | |
501 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
502 | *input_line_pointer = c; | |
503 | } | |
504 | else if (strcmp (p, "epilogue_begin") == 0) | |
505 | { | |
506 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
507 | *input_line_pointer = c; | |
508 | } | |
509 | else if (strcmp (p, "is_stmt") == 0) | |
510 | { | |
511 | *input_line_pointer = c; | |
512 | value = get_absolute_expression (); | |
513 | if (value == 0) | |
514 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
515 | else if (value == 1) | |
516 | current.flags |= DWARF2_FLAG_IS_STMT; | |
517 | else | |
518 | as_bad (_("is_stmt value not 0 or 1")); | |
519 | } | |
520 | else if (strcmp (p, "isa") == 0) | |
521 | { | |
522 | *input_line_pointer = c; | |
523 | value = get_absolute_expression (); | |
524 | if (value < 0) | |
525 | as_bad (_("isa number less than zero")); | |
526 | else | |
527 | current.isa = value; | |
528 | } | |
529 | else | |
530 | { | |
531 | as_bad (_("unknown .loc sub-directive %s"), p); | |
532 | *input_line_pointer = c; | |
533 | } | |
220e750f | 534 | } |
bd0eb99b | 535 | else |
220e750f | 536 | { |
bd0eb99b | 537 | offsetT filenum, line, column; |
220e750f | 538 | |
bd0eb99b RH |
539 | filenum = get_absolute_expression (); |
540 | SKIP_WHITESPACE (); | |
541 | line = get_absolute_expression (); | |
542 | SKIP_WHITESPACE (); | |
543 | column = get_absolute_expression (); | |
220e750f | 544 | |
bd0eb99b RH |
545 | if (filenum < 1) |
546 | { | |
547 | as_bad (_("file number less than one")); | |
548 | return; | |
549 | } | |
550 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
551 | { | |
552 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
553 | return; | |
554 | } | |
555 | ||
556 | current.filenum = filenum; | |
557 | current.line = line; | |
558 | current.column = column; | |
220e750f RH |
559 | |
560 | #ifndef NO_LISTING | |
bd0eb99b | 561 | if (listing) |
a7ed1ca2 | 562 | { |
bd0eb99b RH |
563 | if (files[filenum].dir) |
564 | { | |
565 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
566 | size_t file_len = strlen (files[filenum].filename); | |
567 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
568 | ||
569 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
570 | cp[dir_len] = '/'; | |
571 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); | |
572 | cp[dir_len + file_len + 1] = '\0'; | |
573 | listing_source_file (cp); | |
574 | } | |
575 | else | |
576 | listing_source_file (files[filenum].filename); | |
577 | listing_source_line (line); | |
a7ed1ca2 | 578 | } |
220e750f | 579 | #endif |
bd0eb99b RH |
580 | } |
581 | ||
582 | demand_empty_rest_of_line (); | |
583 | loc_directive_seen = TRUE; | |
220e750f | 584 | } |
220e750f RH |
585 | \f |
586 | static struct frag * | |
a2e22468 | 587 | first_frag_for_seg (segT seg) |
220e750f RH |
588 | { |
589 | frchainS *f, *first = NULL; | |
590 | ||
ee515fb7 | 591 | for (f = frchain_root; f; f = f->frch_next) |
220e750f RH |
592 | if (f->frch_seg == seg |
593 | && (! first || first->frch_subseg > f->frch_subseg)) | |
594 | first = f; | |
595 | ||
596 | return first ? first->frch_root : NULL; | |
597 | } | |
598 | ||
599 | static struct frag * | |
a2e22468 | 600 | last_frag_for_seg (segT seg) |
220e750f RH |
601 | { |
602 | frchainS *f, *last = NULL; | |
603 | ||
ee515fb7 | 604 | for (f = frchain_root; f; f = f->frch_next) |
220e750f RH |
605 | if (f->frch_seg == seg |
606 | && (! last || last->frch_subseg < f->frch_subseg)) | |
607 | last= f; | |
608 | ||
609 | return last ? last->frch_last : NULL; | |
610 | } | |
611 | \f | |
612 | /* Emit a single byte into the current segment. */ | |
613 | ||
614 | static inline void | |
a2e22468 | 615 | out_byte (int byte) |
220e750f RH |
616 | { |
617 | FRAG_APPEND_1_CHAR (byte); | |
618 | } | |
619 | ||
620 | /* Emit a statement program opcode into the current segment. */ | |
621 | ||
622 | static inline void | |
a2e22468 | 623 | out_opcode (int opc) |
220e750f RH |
624 | { |
625 | out_byte (opc); | |
626 | } | |
627 | ||
628 | /* Emit a two-byte word into the current segment. */ | |
629 | ||
630 | static inline void | |
a2e22468 | 631 | out_two (int data) |
220e750f RH |
632 | { |
633 | md_number_to_chars (frag_more (2), data, 2); | |
634 | } | |
635 | ||
636 | /* Emit a four byte word into the current segment. */ | |
637 | ||
638 | static inline void | |
a2e22468 | 639 | out_four (int data) |
220e750f RH |
640 | { |
641 | md_number_to_chars (frag_more (4), data, 4); | |
642 | } | |
643 | ||
644 | /* Emit an unsigned "little-endian base 128" number. */ | |
645 | ||
fac0d250 | 646 | static void |
a2e22468 | 647 | out_uleb128 (addressT value) |
220e750f RH |
648 | { |
649 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
650 | } | |
651 | ||
652 | /* Emit a tuple for .debug_abbrev. */ | |
653 | ||
654 | static inline void | |
a2e22468 | 655 | out_abbrev (int name, int form) |
fac0d250 | 656 | { |
220e750f RH |
657 | out_uleb128 (name); |
658 | out_uleb128 (form); | |
659 | } | |
fac0d250 | 660 | |
220e750f | 661 | /* Get the size of a fragment. */ |
fac0d250 | 662 | |
220e750f | 663 | static offsetT |
a2e22468 | 664 | get_frag_fix (fragS *frag) |
220e750f RH |
665 | { |
666 | frchainS *fr; | |
667 | ||
668 | if (frag->fr_next) | |
669 | return frag->fr_fix; | |
670 | ||
671 | /* If a fragment is the last in the chain, special measures must be | |
672 | taken to find its size before relaxation, since it may be pending | |
673 | on some subsegment chain. */ | |
ee515fb7 | 674 | for (fr = frchain_root; fr; fr = fr->frch_next) |
220e750f | 675 | if (fr->frch_last == frag) |
c5c0a210 | 676 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
677 | |
678 | abort (); | |
679 | } | |
fac0d250 | 680 | |
220e750f | 681 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 682 | |
220e750f | 683 | static void |
a2e22468 | 684 | out_set_addr (segT seg, fragS *frag, addressT ofs) |
220e750f RH |
685 | { |
686 | expressionS expr; | |
687 | symbolS *sym; | |
fac0d250 | 688 | |
b7d6ed97 | 689 | sym = symbol_temp_new (seg, ofs, frag); |
9e3af0e7 | 690 | |
fac0d250 | 691 | out_opcode (DW_LNS_extended_op); |
220e750f | 692 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
693 | |
694 | out_opcode (DW_LNE_set_address); | |
695 | expr.X_op = O_symbol; | |
696 | expr.X_add_symbol = sym; | |
697 | expr.X_add_number = 0; | |
220e750f | 698 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
699 | } |
700 | ||
a3b75434 | 701 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 702 | static void scale_addr_delta (addressT *); |
c8970b4b | 703 | |
a3b75434 | 704 | static void |
d7342424 | 705 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
706 | { |
707 | static int printed_this = 0; | |
708 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
709 | { | |
710 | if (!printed_this) | |
711 | as_bad("unaligned opcodes detected in executable segment"); | |
712 | printed_this = 1; | |
713 | } | |
714 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
715 | } | |
716 | #else | |
717 | #define scale_addr_delta(A) | |
718 | #endif | |
719 | ||
220e750f RH |
720 | /* Encode a pair of line and address skips as efficiently as possible. |
721 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 722 | |
220e750f RH |
723 | The following two routines *must* be kept in sync. This is |
724 | enforced by making emit_inc_line_addr abort if we do not emit | |
725 | exactly the expected number of bytes. */ | |
726 | ||
727 | static int | |
a2e22468 | 728 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 729 | { |
220e750f RH |
730 | unsigned int tmp, opcode; |
731 | int len = 0; | |
fac0d250 | 732 | |
220e750f | 733 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 734 | scale_addr_delta (&addr_delta); |
220e750f RH |
735 | |
736 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
737 | We cannot use special opcodes here, since we want the end_sequence | |
738 | to emit the matrix entry. */ | |
739 | if (line_delta == INT_MAX) | |
fac0d250 | 740 | { |
220e750f RH |
741 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
742 | len = 1; | |
fac0d250 | 743 | else |
220e750f RH |
744 | len = 1 + sizeof_leb128 (addr_delta, 0); |
745 | return len + 3; | |
fac0d250 | 746 | } |
fac0d250 | 747 | |
220e750f RH |
748 | /* Bias the line delta by the base. */ |
749 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 750 | |
220e750f RH |
751 | /* If the line increment is out of range of a special opcode, we |
752 | must encode it with DW_LNS_advance_line. */ | |
753 | if (tmp >= DWARF2_LINE_RANGE) | |
754 | { | |
755 | len = 1 + sizeof_leb128 (line_delta, 1); | |
756 | line_delta = 0; | |
757 | tmp = 0 - DWARF2_LINE_BASE; | |
758 | } | |
fac0d250 | 759 | |
220e750f RH |
760 | /* Bias the opcode by the special opcode base. */ |
761 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 762 | |
220e750f RH |
763 | /* Avoid overflow when addr_delta is large. */ |
764 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
765 | { | |
766 | /* Try using a special opcode. */ | |
767 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
768 | if (opcode <= 255) | |
769 | return len + 1; | |
770 | ||
771 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
772 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
773 | if (opcode <= 255) | |
774 | return len + 2; | |
775 | } | |
776 | ||
777 | /* Otherwise use DW_LNS_advance_pc. */ | |
778 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
779 | ||
780 | /* DW_LNS_copy or special opcode. */ | |
781 | len += 1; | |
782 | ||
783 | return len; | |
784 | } | |
fac0d250 | 785 | |
220e750f | 786 | static void |
a2e22468 | 787 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
788 | { |
789 | unsigned int tmp, opcode; | |
790 | int need_copy = 0; | |
791 | char *end = p + len; | |
fac0d250 | 792 | |
220e750f | 793 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
794 | scale_addr_delta (&addr_delta); |
795 | ||
220e750f RH |
796 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
797 | We cannot use special opcodes here, since we want the end_sequence | |
798 | to emit the matrix entry. */ | |
799 | if (line_delta == INT_MAX) | |
fac0d250 | 800 | { |
220e750f RH |
801 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
802 | *p++ = DW_LNS_const_add_pc; | |
803 | else | |
fac0d250 | 804 | { |
220e750f RH |
805 | *p++ = DW_LNS_advance_pc; |
806 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 807 | } |
220e750f RH |
808 | |
809 | *p++ = DW_LNS_extended_op; | |
810 | *p++ = 1; | |
811 | *p++ = DW_LNE_end_sequence; | |
812 | goto done; | |
fac0d250 RH |
813 | } |
814 | ||
220e750f RH |
815 | /* Bias the line delta by the base. */ |
816 | tmp = line_delta - DWARF2_LINE_BASE; | |
817 | ||
818 | /* If the line increment is out of range of a special opcode, we | |
819 | must encode it with DW_LNS_advance_line. */ | |
820 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 821 | { |
220e750f RH |
822 | *p++ = DW_LNS_advance_line; |
823 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 824 | |
220e750f RH |
825 | line_delta = 0; |
826 | tmp = 0 - DWARF2_LINE_BASE; | |
827 | need_copy = 1; | |
828 | } | |
fac0d250 | 829 | |
bd0eb99b RH |
830 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
831 | special opcode. */ | |
832 | if (line_delta == 0 && addr_delta == 0) | |
833 | { | |
834 | *p++ = DW_LNS_copy; | |
835 | goto done; | |
836 | } | |
837 | ||
220e750f RH |
838 | /* Bias the opcode by the special opcode base. */ |
839 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 840 | |
220e750f RH |
841 | /* Avoid overflow when addr_delta is large. */ |
842 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 843 | { |
220e750f RH |
844 | /* Try using a special opcode. */ |
845 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
846 | if (opcode <= 255) | |
847 | { | |
848 | *p++ = opcode; | |
849 | goto done; | |
850 | } | |
851 | ||
852 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
853 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
854 | if (opcode <= 255) | |
fac0d250 | 855 | { |
220e750f RH |
856 | *p++ = DW_LNS_const_add_pc; |
857 | *p++ = opcode; | |
858 | goto done; | |
fac0d250 RH |
859 | } |
860 | } | |
220e750f RH |
861 | |
862 | /* Otherwise use DW_LNS_advance_pc. */ | |
863 | *p++ = DW_LNS_advance_pc; | |
864 | p += output_leb128 (p, addr_delta, 0); | |
865 | ||
866 | if (need_copy) | |
867 | *p++ = DW_LNS_copy; | |
fac0d250 | 868 | else |
220e750f | 869 | *p++ = tmp; |
fac0d250 | 870 | |
220e750f RH |
871 | done: |
872 | assert (p == end); | |
873 | } | |
a8316fe2 | 874 | |
220e750f | 875 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 876 | |
220e750f | 877 | static void |
a2e22468 | 878 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
879 | { |
880 | int len = size_inc_line_addr (line_delta, addr_delta); | |
881 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
882 | } | |
9de8d8f1 | 883 | |
220e750f RH |
884 | /* Generate a variant frag that we can use to relax address/line |
885 | increments between fragments of the target segment. */ | |
9e3af0e7 | 886 | |
220e750f | 887 | static void |
a2e22468 KH |
888 | relax_inc_line_addr (int line_delta, segT seg, |
889 | fragS *to_frag, addressT to_ofs, | |
890 | fragS *from_frag, addressT from_ofs) | |
220e750f RH |
891 | { |
892 | symbolS *to_sym, *from_sym; | |
893 | expressionS expr; | |
894 | int max_chars; | |
6576f0b5 | 895 | |
b7d6ed97 RH |
896 | to_sym = symbol_temp_new (seg, to_ofs, to_frag); |
897 | from_sym = symbol_temp_new (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 | 916 | int |
a2e22468 | 917 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
918 | { |
919 | offsetT addr_delta; | |
920 | int size; | |
fac0d250 | 921 | |
6386f3a7 | 922 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
220e750f | 923 | size = size_inc_line_addr (frag->fr_offset, addr_delta); |
fac0d250 | 924 | |
220e750f | 925 | frag->fr_subtype = size; |
fac0d250 | 926 | |
220e750f RH |
927 | return size; |
928 | } | |
929 | ||
930 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
931 | current values of the symbols. fr_subtype is the current length | |
932 | of the frag. This returns the change in frag length. */ | |
933 | ||
934 | int | |
a2e22468 | 935 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
936 | { |
937 | int old_size, new_size; | |
fac0d250 | 938 | |
220e750f RH |
939 | old_size = frag->fr_subtype; |
940 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 941 | |
220e750f | 942 | return new_size - old_size; |
fac0d250 RH |
943 | } |
944 | ||
220e750f RH |
945 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
946 | fill frag. This is called after all relaxation has been done. | |
947 | fr_subtype will be the desired length of the frag. */ | |
948 | ||
949 | void | |
a2e22468 | 950 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 951 | { |
220e750f RH |
952 | offsetT addr_diff; |
953 | ||
6386f3a7 | 954 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 955 | |
220e750f RH |
956 | /* fr_var carries the max_chars that we created the fragment with. |
957 | fr_subtype carries the current expected length. We must, of | |
958 | course, have allocated enough memory earlier. */ | |
bccba5f0 | 959 | assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 960 | |
ee515fb7 | 961 | emit_inc_line_addr (frag->fr_offset, addr_diff, |
220e750f RH |
962 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); |
963 | ||
964 | frag->fr_fix += frag->fr_subtype; | |
965 | frag->fr_type = rs_fill; | |
966 | frag->fr_var = 0; | |
967 | frag->fr_offset = 0; | |
968 | } | |
969 | ||
970 | /* Generate .debug_line content for the chain of line number entries | |
971 | beginning at E, for segment SEG. */ | |
972 | ||
973 | static void | |
a2e22468 | 974 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
975 | { |
976 | unsigned filenum = 1; | |
977 | unsigned line = 1; | |
978 | unsigned column = 0; | |
bd0eb99b RH |
979 | unsigned isa = 0; |
980 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
220e750f RH |
981 | fragS *frag = NULL; |
982 | fragS *last_frag; | |
983 | addressT frag_ofs = 0; | |
984 | addressT last_frag_ofs; | |
985 | struct line_entry *next; | |
986 | ||
987 | while (e) | |
fac0d250 | 988 | { |
220e750f RH |
989 | int changed = 0; |
990 | ||
991 | if (filenum != e->loc.filenum) | |
fac0d250 | 992 | { |
220e750f RH |
993 | filenum = e->loc.filenum; |
994 | out_opcode (DW_LNS_set_file); | |
995 | out_uleb128 (filenum); | |
996 | changed = 1; | |
997 | } | |
998 | ||
999 | if (column != e->loc.column) | |
1000 | { | |
1001 | column = e->loc.column; | |
1002 | out_opcode (DW_LNS_set_column); | |
1003 | out_uleb128 (column); | |
1004 | changed = 1; | |
1005 | } | |
1006 | ||
bd0eb99b RH |
1007 | if (isa != e->loc.isa) |
1008 | { | |
1009 | isa = e->loc.isa; | |
1010 | out_opcode (DW_LNS_set_isa); | |
1011 | out_uleb128 (isa); | |
1012 | changed = 1; | |
1013 | } | |
1014 | ||
1015 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1016 | { |
1017 | flags = e->loc.flags; | |
1018 | out_opcode (DW_LNS_negate_stmt); | |
1019 | changed = 1; | |
1020 | } | |
1021 | ||
bd0eb99b | 1022 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
220e750f RH |
1023 | { |
1024 | out_opcode (DW_LNS_set_basic_block); | |
1025 | changed = 1; | |
1026 | } | |
1027 | ||
bd0eb99b RH |
1028 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
1029 | { | |
1030 | out_opcode (DW_LNS_set_prologue_end); | |
1031 | changed = 1; | |
1032 | } | |
1033 | ||
1034 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
1035 | { | |
1036 | out_opcode (DW_LNS_set_epilogue_begin); | |
1037 | changed = 1; | |
1038 | } | |
1039 | ||
fb81275c JM |
1040 | /* Don't try to optimize away redundant entries; gdb wants two |
1041 | entries for a function where the code starts on the same line as | |
1042 | the {, and there's no way to identify that case here. Trust gcc | |
1043 | to optimize appropriately. */ | |
1044 | if (1 /* line != e->loc.line || changed */) | |
220e750f RH |
1045 | { |
1046 | int line_delta = e->loc.line - line; | |
1047 | if (frag == NULL) | |
fac0d250 | 1048 | { |
220e750f RH |
1049 | out_set_addr (seg, e->frag, e->frag_ofs); |
1050 | out_inc_line_addr (line_delta, 0); | |
fac0d250 | 1051 | } |
220e750f RH |
1052 | else if (frag == e->frag) |
1053 | out_inc_line_addr (line_delta, e->frag_ofs - frag_ofs); | |
1054 | else | |
1055 | relax_inc_line_addr (line_delta, seg, e->frag, e->frag_ofs, | |
1056 | frag, frag_ofs); | |
1057 | ||
1058 | frag = e->frag; | |
1059 | frag_ofs = e->frag_ofs; | |
1060 | line = e->loc.line; | |
fac0d250 | 1061 | } |
220e750f RH |
1062 | else if (frag == NULL) |
1063 | { | |
1064 | out_set_addr (seg, e->frag, e->frag_ofs); | |
1065 | frag = e->frag; | |
1066 | frag_ofs = e->frag_ofs; | |
1067 | } | |
1068 | ||
1069 | next = e->next; | |
1070 | free (e); | |
1071 | e = next; | |
fac0d250 | 1072 | } |
353e2c69 | 1073 | |
220e750f RH |
1074 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
1075 | last_frag = last_frag_for_seg (seg); | |
1076 | last_frag_ofs = get_frag_fix (last_frag); | |
1077 | if (frag == last_frag) | |
1078 | out_inc_line_addr (INT_MAX, last_frag_ofs - frag_ofs); | |
1079 | else | |
ee515fb7 | 1080 | relax_inc_line_addr (INT_MAX, seg, last_frag, last_frag_ofs, |
220e750f | 1081 | frag, frag_ofs); |
fac0d250 RH |
1082 | } |
1083 | ||
220e750f RH |
1084 | /* Emit the directory and file tables for .debug_line. */ |
1085 | ||
fac0d250 | 1086 | static void |
a2e22468 | 1087 | out_file_list (void) |
fac0d250 RH |
1088 | { |
1089 | size_t size; | |
1090 | char *cp; | |
220e750f RH |
1091 | unsigned int i; |
1092 | ||
a7ed1ca2 NC |
1093 | /* Emit directory list. */ |
1094 | for (i = 1; i < dirs_in_use; ++i) | |
1095 | { | |
1096 | size = strlen (dirs[i]) + 1; | |
1097 | cp = frag_more (size); | |
1098 | memcpy (cp, dirs[i], size); | |
1099 | } | |
1100 | /* Terminate it. */ | |
220e750f | 1101 | out_byte ('\0'); |
fac0d250 | 1102 | |
220e750f | 1103 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1104 | { |
249e3833 RH |
1105 | if (files[i].filename == NULL) |
1106 | { | |
0e389e77 | 1107 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1108 | /* Prevent a crash later, particularly for file 1. */ |
1109 | files[i].filename = ""; | |
249e3833 RH |
1110 | continue; |
1111 | } | |
1112 | ||
220e750f | 1113 | size = strlen (files[i].filename) + 1; |
fac0d250 | 1114 | cp = frag_more (size); |
220e750f | 1115 | memcpy (cp, files[i].filename, size); |
fac0d250 | 1116 | |
220e750f | 1117 | out_uleb128 (files[i].dir); /* directory number */ |
fac0d250 RH |
1118 | out_uleb128 (0); /* last modification timestamp */ |
1119 | out_uleb128 (0); /* filesize */ | |
1120 | } | |
353e2c69 KH |
1121 | |
1122 | /* Terminate filename list. */ | |
1123 | out_byte (0); | |
fac0d250 RH |
1124 | } |
1125 | ||
220e750f RH |
1126 | /* Emit the collected .debug_line data. */ |
1127 | ||
1128 | static void | |
a2e22468 | 1129 | out_debug_line (segT line_seg) |
220e750f RH |
1130 | { |
1131 | expressionS expr; | |
1132 | symbolS *line_start; | |
1133 | symbolS *prologue_end; | |
1134 | symbolS *line_end; | |
1135 | struct line_seg *s; | |
14e777e0 KB |
1136 | enum dwarf2_format d2f; |
1137 | int sizeof_offset; | |
220e750f RH |
1138 | |
1139 | subseg_set (line_seg, 0); | |
1140 | ||
b7d6ed97 RH |
1141 | line_start = symbol_temp_new_now (); |
1142 | prologue_end = symbol_temp_make (); | |
1143 | line_end = symbol_temp_make (); | |
220e750f RH |
1144 | |
1145 | /* Total length of the information for this compilation unit. */ | |
1146 | expr.X_op = O_subtract; | |
1147 | expr.X_add_symbol = line_end; | |
1148 | expr.X_op_symbol = line_start; | |
14e777e0 KB |
1149 | |
1150 | d2f = DWARF2_FORMAT (); | |
1151 | if (d2f == dwarf2_format_32bit) | |
1152 | { | |
1153 | expr.X_add_number = -4; | |
1154 | emit_expr (&expr, 4); | |
1155 | sizeof_offset = 4; | |
1156 | } | |
1157 | else if (d2f == dwarf2_format_64bit) | |
1158 | { | |
1159 | expr.X_add_number = -12; | |
1160 | out_four (-1); | |
1161 | emit_expr (&expr, 8); | |
1162 | sizeof_offset = 8; | |
1163 | } | |
1164 | else if (d2f == dwarf2_format_64bit_irix) | |
1165 | { | |
1166 | expr.X_add_number = -8; | |
1167 | emit_expr (&expr, 8); | |
1168 | sizeof_offset = 8; | |
1169 | } | |
1170 | else | |
1171 | { | |
1172 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1173 | } | |
220e750f RH |
1174 | |
1175 | /* Version. */ | |
1176 | out_two (2); | |
1177 | ||
1178 | /* Length of the prologue following this length. */ | |
1179 | expr.X_op = O_subtract; | |
1180 | expr.X_add_symbol = prologue_end; | |
1181 | expr.X_op_symbol = line_start; | |
1182 | expr.X_add_number = - (4 + 2 + 4); | |
14e777e0 | 1183 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1184 | |
1185 | /* Parameters of the state machine. */ | |
1186 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1187 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1188 | out_byte (DWARF2_LINE_BASE); | |
1189 | out_byte (DWARF2_LINE_RANGE); | |
1190 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1191 | ||
1192 | /* Standard opcode lengths. */ | |
1193 | out_byte (0); /* DW_LNS_copy */ | |
1194 | out_byte (1); /* DW_LNS_advance_pc */ | |
1195 | out_byte (1); /* DW_LNS_advance_line */ | |
1196 | out_byte (1); /* DW_LNS_set_file */ | |
1197 | out_byte (1); /* DW_LNS_set_column */ | |
1198 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1199 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1200 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1201 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1202 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1203 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1204 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1205 | |
1206 | out_file_list (); | |
1207 | ||
b7d6ed97 | 1208 | symbol_set_value_now (prologue_end); |
220e750f RH |
1209 | |
1210 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1211 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1212 | process_entries (s->seg, s->head->head); |
1213 | ||
b7d6ed97 | 1214 | symbol_set_value_now (line_end); |
220e750f RH |
1215 | } |
1216 | ||
1217 | /* Emit data for .debug_aranges. */ | |
1218 | ||
58b5739a | 1219 | static void |
a2e22468 | 1220 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1221 | { |
220e750f RH |
1222 | unsigned int addr_size = sizeof_address; |
1223 | addressT size, skip; | |
1224 | struct line_seg *s; | |
1225 | expressionS expr; | |
1226 | char *p; | |
fac0d250 | 1227 | |
220e750f | 1228 | size = 4 + 2 + 4 + 1 + 1; |
fac0d250 | 1229 | |
ee515fb7 KH |
1230 | skip = 2 * addr_size - (size & (2 * addr_size - 1)); |
1231 | if (skip == 2 * addr_size) | |
220e750f RH |
1232 | skip = 0; |
1233 | size += skip; | |
fac0d250 | 1234 | |
ee515fb7 KH |
1235 | for (s = all_segs; s; s = s->next) |
1236 | size += 2 * addr_size; | |
fac0d250 | 1237 | |
ee515fb7 | 1238 | size += 2 * addr_size; |
fac0d250 | 1239 | |
220e750f | 1240 | subseg_set (aranges_seg, 0); |
fac0d250 | 1241 | |
220e750f RH |
1242 | /* Length of the compilation unit. */ |
1243 | out_four (size - 4); | |
fac0d250 | 1244 | |
220e750f RH |
1245 | /* Version. */ |
1246 | out_two (2); | |
4dc7ead9 | 1247 | |
220e750f | 1248 | /* Offset to .debug_info. */ |
6174d9c8 RH |
1249 | /* ??? sizeof_offset */ |
1250 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4); | |
220e750f RH |
1251 | |
1252 | /* Size of an address (offset portion). */ | |
1253 | out_byte (addr_size); | |
1254 | ||
1255 | /* Size of a segment descriptor. */ | |
1256 | out_byte (0); | |
1257 | ||
1258 | /* Align the header. */ | |
1259 | if (skip) | |
ee515fb7 | 1260 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1261 | |
ee515fb7 | 1262 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1263 | { |
1264 | fragS *frag; | |
1265 | symbolS *beg, *end; | |
1266 | ||
1267 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1268 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1269 | s->text_start = beg; |
1270 | ||
1271 | frag = last_frag_for_seg (s->seg); | |
b7d6ed97 | 1272 | end = symbol_temp_new (s->seg, get_frag_fix (frag), frag); |
220e750f RH |
1273 | s->text_end = end; |
1274 | ||
1275 | expr.X_op = O_symbol; | |
1276 | expr.X_add_symbol = beg; | |
1277 | expr.X_add_number = 0; | |
1278 | emit_expr (&expr, addr_size); | |
1279 | ||
1280 | expr.X_op = O_subtract; | |
1281 | expr.X_add_symbol = end; | |
1282 | expr.X_op_symbol = beg; | |
1283 | expr.X_add_number = 0; | |
1284 | emit_expr (&expr, addr_size); | |
1285 | } | |
4dc7ead9 | 1286 | |
220e750f RH |
1287 | p = frag_more (2 * addr_size); |
1288 | md_number_to_chars (p, 0, addr_size); | |
1289 | md_number_to_chars (p + addr_size, 0, addr_size); | |
4dc7ead9 RH |
1290 | } |
1291 | ||
220e750f RH |
1292 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1293 | sync with out_debug_info below. */ | |
fac0d250 | 1294 | |
220e750f | 1295 | static void |
a2e22468 | 1296 | out_debug_abbrev (segT abbrev_seg) |
220e750f RH |
1297 | { |
1298 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1299 | |
220e750f RH |
1300 | out_uleb128 (1); |
1301 | out_uleb128 (DW_TAG_compile_unit); | |
1302 | out_byte (DW_CHILDREN_no); | |
1303 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1304 | if (all_segs->next == NULL) | |
4dc7ead9 | 1305 | { |
220e750f RH |
1306 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1307 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1308 | } | |
48b91938 | 1309 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1310 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1311 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1312 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1313 | out_abbrev (0, 0); | |
a987bfc9 RH |
1314 | |
1315 | /* Terminate the abbreviations for this compilation unit. */ | |
1316 | out_byte (0); | |
220e750f | 1317 | } |
4dc7ead9 | 1318 | |
220e750f | 1319 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1320 | |
220e750f | 1321 | static void |
a2e22468 | 1322 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg) |
220e750f RH |
1323 | { |
1324 | char producer[128]; | |
1325 | char *comp_dir; | |
1326 | expressionS expr; | |
1327 | symbolS *info_start; | |
1328 | symbolS *info_end; | |
1329 | char *p; | |
1330 | int len; | |
14e777e0 KB |
1331 | enum dwarf2_format d2f; |
1332 | int sizeof_offset; | |
4dc7ead9 | 1333 | |
220e750f | 1334 | subseg_set (info_seg, 0); |
4dc7ead9 | 1335 | |
b7d6ed97 RH |
1336 | info_start = symbol_temp_new_now (); |
1337 | info_end = symbol_temp_make (); | |
4dc7ead9 | 1338 | |
220e750f RH |
1339 | /* Compilation Unit length. */ |
1340 | expr.X_op = O_subtract; | |
1341 | expr.X_add_symbol = info_end; | |
1342 | expr.X_op_symbol = info_start; | |
14e777e0 KB |
1343 | |
1344 | d2f = DWARF2_FORMAT (); | |
1345 | if (d2f == dwarf2_format_32bit) | |
1346 | { | |
1347 | expr.X_add_number = -4; | |
1348 | emit_expr (&expr, 4); | |
1349 | sizeof_offset = 4; | |
1350 | } | |
1351 | else if (d2f == dwarf2_format_64bit) | |
1352 | { | |
1353 | expr.X_add_number = -12; | |
1354 | out_four (-1); | |
1355 | emit_expr (&expr, 8); | |
1356 | sizeof_offset = 8; | |
1357 | } | |
1358 | else if (d2f == dwarf2_format_64bit_irix) | |
1359 | { | |
1360 | expr.X_add_number = -8; | |
1361 | emit_expr (&expr, 8); | |
1362 | sizeof_offset = 8; | |
1363 | } | |
1364 | else | |
1365 | { | |
1366 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1367 | } | |
4dc7ead9 | 1368 | |
220e750f RH |
1369 | /* DWARF version. */ |
1370 | out_two (2); | |
4dc7ead9 | 1371 | |
220e750f | 1372 | /* .debug_abbrev offset */ |
6174d9c8 | 1373 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1374 | |
220e750f RH |
1375 | /* Target address size. */ |
1376 | out_byte (sizeof_address); | |
fac0d250 | 1377 | |
220e750f RH |
1378 | /* DW_TAG_compile_unit DIE abbrev */ |
1379 | out_uleb128 (1); | |
fac0d250 | 1380 | |
220e750f | 1381 | /* DW_AT_stmt_list */ |
6174d9c8 RH |
1382 | /* ??? sizeof_offset */ |
1383 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4); | |
fac0d250 | 1384 | |
220e750f RH |
1385 | /* These two attributes may only be emitted if all of the code is |
1386 | contiguous. Multiple sections are not that. */ | |
1387 | if (all_segs->next == NULL) | |
58b5739a | 1388 | { |
220e750f RH |
1389 | /* DW_AT_low_pc */ |
1390 | expr.X_op = O_symbol; | |
1391 | expr.X_add_symbol = all_segs->text_start; | |
1392 | expr.X_add_number = 0; | |
1393 | emit_expr (&expr, sizeof_address); | |
1394 | ||
1395 | /* DW_AT_high_pc */ | |
1396 | expr.X_op = O_symbol; | |
1397 | expr.X_add_symbol = all_segs->text_end; | |
1398 | expr.X_add_number = 0; | |
1399 | emit_expr (&expr, sizeof_address); | |
58b5739a RH |
1400 | } |
1401 | ||
48b91938 RH |
1402 | /* DW_AT_name. We don't have the actual file name that was present |
1403 | on the command line, so assume files[1] is the main input file. | |
1404 | We're not supposed to get called unless at least one line number | |
1405 | entry was emitted, so this should always be defined. */ | |
1406 | if (!files || files_in_use < 1) | |
1407 | abort (); | |
a7ed1ca2 NC |
1408 | if (files[1].dir) |
1409 | { | |
1410 | len = strlen (dirs[files[1].dir]); | |
1411 | p = frag_more (len + 1); | |
1412 | memcpy (p, dirs[files[1].dir], len); | |
1413 | p[len] = '/'; | |
1414 | } | |
48b91938 RH |
1415 | len = strlen (files[1].filename) + 1; |
1416 | p = frag_more (len); | |
1417 | memcpy (p, files[1].filename, len); | |
1418 | ||
220e750f RH |
1419 | /* DW_AT_comp_dir */ |
1420 | comp_dir = getpwd (); | |
1421 | len = strlen (comp_dir) + 1; | |
1422 | p = frag_more (len); | |
1423 | memcpy (p, comp_dir, len); | |
fac0d250 | 1424 | |
220e750f RH |
1425 | /* DW_AT_producer */ |
1426 | sprintf (producer, "GNU AS %s", VERSION); | |
1427 | len = strlen (producer) + 1; | |
1428 | p = frag_more (len); | |
1429 | memcpy (p, producer, len); | |
fac0d250 | 1430 | |
220e750f RH |
1431 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1432 | dwarf2 draft has no standard code for assembler. */ | |
1433 | out_two (DW_LANG_Mips_Assembler); | |
1434 | ||
b7d6ed97 | 1435 | symbol_set_value_now (info_end); |
fac0d250 RH |
1436 | } |
1437 | ||
c6cb92c5 NS |
1438 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1439 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
1440 | file has a non-empty .debug_info section. If we emit .debug_line, | |
1441 | and the .debug_info section is empty, we also emit .debug_info, | |
1442 | .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if | |
1443 | there were any .file/.loc directives, or --gdwarf2 was given and | |
1444 | there were any located instructions emitted. */ | |
1445 | ||
fac0d250 | 1446 | void |
a2e22468 | 1447 | dwarf2_finish (void) |
fac0d250 | 1448 | { |
220e750f RH |
1449 | segT line_seg; |
1450 | struct line_seg *s; | |
c6cb92c5 NS |
1451 | segT info_seg; |
1452 | int emit_other_sections = 0; | |
1453 | ||
1454 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1455 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1456 | |
c6cb92c5 NS |
1457 | if (!all_segs && emit_other_sections) |
1458 | /* There is no line information and no non-empty .debug_info | |
1459 | section. */ | |
220e750f | 1460 | return; |
fac0d250 | 1461 | |
220e750f | 1462 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1463 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1464 | |
220e750f RH |
1465 | /* Create and switch to the line number section. */ |
1466 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1467 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1468 | |
220e750f | 1469 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1470 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1471 | { |
220e750f RH |
1472 | struct line_subseg *ss = s->head; |
1473 | struct line_entry **ptail = ss->ptail; | |
1474 | ||
1475 | while ((ss = ss->next) != NULL) | |
1476 | { | |
1477 | *ptail = ss->head; | |
1478 | ptail = ss->ptail; | |
1479 | } | |
fac0d250 | 1480 | } |
85a39694 | 1481 | |
220e750f | 1482 | out_debug_line (line_seg); |
85a39694 | 1483 | |
c6cb92c5 NS |
1484 | /* If this is assembler generated line info, and there is no |
1485 | debug_info already, we need .debug_info and .debug_abbrev | |
1486 | sections as well. */ | |
1487 | if (emit_other_sections) | |
220e750f RH |
1488 | { |
1489 | segT abbrev_seg; | |
220e750f | 1490 | segT aranges_seg; |
4dc7ead9 | 1491 | |
c6cb92c5 NS |
1492 | assert (all_segs); |
1493 | ||
220e750f RH |
1494 | info_seg = subseg_new (".debug_info", 0); |
1495 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1496 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1497 | |
8a7140c3 NC |
1498 | bfd_set_section_flags (stdoutput, info_seg, |
1499 | SEC_READONLY | SEC_DEBUGGING); | |
1500 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1501 | SEC_READONLY | SEC_DEBUGGING); | |
1502 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1503 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1504 | |
ee515fb7 | 1505 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1506 | |
220e750f RH |
1507 | out_debug_aranges (aranges_seg, info_seg); |
1508 | out_debug_abbrev (abbrev_seg); | |
1509 | out_debug_info (info_seg, abbrev_seg, line_seg); | |
1510 | } | |
85a39694 | 1511 | } |