Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
7ddd14de | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
2da5c037 | 3 | Free Software Foundation, Inc. |
fac0d250 RH |
4 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
fac0d250 RH |
11 | any later version. |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
fac0d250 | 22 | |
89b66cde | 23 | /* Logical line numbers can be controlled by the compiler via the |
bd0eb99b | 24 | following directives: |
fac0d250 RH |
25 | |
26 | .file FILENO "file.c" | |
ecea7679 | 27 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
92846e72 CC |
28 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] \ |
29 | [discriminator VALUE] | |
bd0eb99b | 30 | */ |
fac0d250 | 31 | |
fac0d250 | 32 | #include "as.h" |
bd0eb99b | 33 | #include "safe-ctype.h" |
92eb7b32 | 34 | |
42dbf88c NC |
35 | #ifdef HAVE_LIMITS_H |
36 | #include <limits.h> | |
92625c16 | 37 | #else |
6717891c NC |
38 | #ifdef HAVE_SYS_PARAM_H |
39 | #include <sys/param.h> | |
40 | #endif | |
6256f9dd | 41 | #ifndef INT_MAX |
ee515fb7 | 42 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 43 | #endif |
b8f080d6 | 44 | #endif |
42dbf88c | 45 | |
70658493 | 46 | #include "dwarf2dbg.h" |
a7ed1ca2 | 47 | #include <filenames.h> |
70658493 | 48 | |
56487c55 NC |
49 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
50 | /* We need to decide which character to use as a directory separator. | |
51 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
52 | necessarily mean that the backslash character is the one to use. | |
53 | Some environments, eg Cygwin, can support both naming conventions. | |
54 | So we use the heuristic that we only need to use the backslash if | |
55 | the path is an absolute path starting with a DOS style drive | |
56 | selector. eg C: or D: */ | |
57 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
58 | do \ | |
59 | { \ | |
60 | if (offset > 1 \ | |
7fd3924a AM |
61 | && string[0] != 0 \ |
62 | && string[1] == ':') \ | |
56487c55 NC |
63 | string [offset] = '\\'; \ |
64 | else \ | |
65 | string [offset] = '/'; \ | |
66 | } \ | |
67 | while (0) | |
68 | #else | |
69 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
70 | #endif | |
71 | ||
14e777e0 | 72 | #ifndef DWARF2_FORMAT |
413a266c | 73 | # define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
14e777e0 KB |
74 | #endif |
75 | ||
9605f328 | 76 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 77 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
78 | #endif |
79 | ||
01e1a5bc NC |
80 | #ifndef DWARF2_FILE_NAME |
81 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
82 | #endif | |
83 | ||
84 | #ifndef DWARF2_FILE_TIME_NAME | |
85 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) 0 | |
86 | #endif | |
87 | ||
88 | #ifndef DWARF2_FILE_SIZE_NAME | |
89 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) 0 | |
90 | #endif | |
91 | ||
fac0d250 RH |
92 | #include "subsegs.h" |
93 | ||
fa8f86ff | 94 | #include "dwarf2.h" |
fac0d250 | 95 | |
fac0d250 RH |
96 | /* Since we can't generate the prolog until the body is complete, we |
97 | use three different subsegments for .debug_line: one holding the | |
98 | prolog, one for the directory and filename info, and one for the | |
99 | body ("statement program"). */ | |
100 | #define DL_PROLOG 0 | |
101 | #define DL_FILES 1 | |
102 | #define DL_BODY 2 | |
103 | ||
1737851b BW |
104 | /* If linker relaxation might change offsets in the code, the DWARF special |
105 | opcodes and variable-length operands cannot be used. If this macro is | |
106 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
107 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
108 | # define DWARF2_USE_FIXED_ADVANCE_PC 0 | |
109 | #endif | |
110 | ||
fac0d250 RH |
111 | /* First special line opcde - leave room for the standard opcodes. |
112 | Note: If you want to change this, you'll have to update the | |
113 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
114 | out_debug_line(). */ |
115 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
116 | |
117 | #ifndef DWARF2_LINE_BASE | |
118 | /* Minimum line offset in a special line info. opcode. This value | |
119 | was chosen to give a reasonable range of values. */ | |
120 | # define DWARF2_LINE_BASE -5 | |
121 | #endif | |
122 | ||
123 | /* Range of line offsets in a special line info. opcode. */ | |
124 | #ifndef DWARF2_LINE_RANGE | |
125 | # define DWARF2_LINE_RANGE 14 | |
126 | #endif | |
127 | ||
128 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
129 | /* Define the architecture-dependent minimum instruction length (in | |
130 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 131 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
132 | #endif |
133 | ||
bd0eb99b | 134 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
135 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
136 | ||
cb30237e | 137 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
138 | #define SPECIAL_LINE(op) \ |
139 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
140 | ||
141 | /* Given a special op, return the address skip amount (in units of | |
142 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
143 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
144 | ||
cb30237e | 145 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
146 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
147 | ||
ee515fb7 | 148 | struct line_entry { |
220e750f | 149 | struct line_entry *next; |
07a53e5c | 150 | symbolS *label; |
220e750f | 151 | struct dwarf2_line_info loc; |
e6c774b4 | 152 | }; |
fac0d250 | 153 | |
ee515fb7 | 154 | struct line_subseg { |
220e750f RH |
155 | struct line_subseg *next; |
156 | subsegT subseg; | |
157 | struct line_entry *head; | |
158 | struct line_entry **ptail; | |
159 | }; | |
353e2c69 | 160 | |
ee515fb7 | 161 | struct line_seg { |
220e750f RH |
162 | struct line_seg *next; |
163 | segT seg; | |
164 | struct line_subseg *head; | |
165 | symbolS *text_start; | |
166 | symbolS *text_end; | |
167 | }; | |
168 | ||
169 | /* Collects data for all line table entries during assembly. */ | |
170 | static struct line_seg *all_segs; | |
171 | ||
ee515fb7 | 172 | struct file_entry { |
a7ed1ca2 | 173 | const char *filename; |
220e750f RH |
174 | unsigned int dir; |
175 | }; | |
176 | ||
177 | /* Table of files used by .debug_line. */ | |
178 | static struct file_entry *files; | |
179 | static unsigned int files_in_use; | |
180 | static unsigned int files_allocated; | |
181 | ||
a7ed1ca2 NC |
182 | /* Table of directories used by .debug_line. */ |
183 | static char **dirs; | |
184 | static unsigned int dirs_in_use; | |
185 | static unsigned int dirs_allocated; | |
186 | ||
b34976b6 | 187 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 188 | doing work when there's nothing to do. */ |
1eee4adc | 189 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 190 | |
07a53e5c RH |
191 | /* TRUE when we're supposed to set the basic block mark whenever a |
192 | label is seen. */ | |
193 | bfd_boolean dwarf2_loc_mark_labels; | |
194 | ||
220e750f | 195 | /* Current location as indicated by the most recent .loc directive. */ |
bd0eb99b RH |
196 | static struct dwarf2_line_info current = { |
197 | 1, 1, 0, 0, | |
92846e72 CC |
198 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
199 | 0 | |
bd0eb99b | 200 | }; |
220e750f | 201 | |
220e750f RH |
202 | /* The size of an address on the target. */ |
203 | static unsigned int sizeof_address; | |
204 | \f | |
a2e22468 | 205 | static unsigned int get_filenum (const char *, unsigned int); |
413a266c | 206 | |
c5c0a210 | 207 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 208 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 209 | |
6174d9c8 RH |
210 | /* Create an offset to .dwarf2_*. */ |
211 | ||
212 | static void | |
a2e22468 | 213 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 RH |
214 | { |
215 | expressionS expr; | |
216 | ||
217 | expr.X_op = O_symbol; | |
218 | expr.X_add_symbol = symbol; | |
219 | expr.X_add_number = 0; | |
220 | emit_expr (&expr, size); | |
221 | } | |
c5c0a210 | 222 | #endif |
6174d9c8 | 223 | |
220e750f RH |
224 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
225 | ||
226 | static struct line_subseg * | |
a2e22468 | 227 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
228 | { |
229 | static segT last_seg; | |
230 | static subsegT last_subseg; | |
231 | static struct line_subseg *last_line_subseg; | |
232 | ||
001ae1a4 | 233 | struct line_seg **ps, *s; |
220e750f | 234 | struct line_subseg **pss, *ss; |
fac0d250 | 235 | |
220e750f RH |
236 | if (seg == last_seg && subseg == last_subseg) |
237 | return last_line_subseg; | |
238 | ||
001ae1a4 | 239 | for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next) |
220e750f RH |
240 | if (s->seg == seg) |
241 | goto found_seg; | |
242 | ||
243 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
001ae1a4 | 244 | s->next = NULL; |
220e750f RH |
245 | s->seg = seg; |
246 | s->head = NULL; | |
001ae1a4 | 247 | *ps = s; |
220e750f RH |
248 | |
249 | found_seg: | |
250 | for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) | |
fac0d250 | 251 | { |
220e750f | 252 | if (ss->subseg == subseg) |
ee515fb7 | 253 | goto found_subseg; |
220e750f RH |
254 | if (ss->subseg > subseg) |
255 | break; | |
fac0d250 | 256 | } |
220e750f RH |
257 | |
258 | ss = (struct line_subseg *) xmalloc (sizeof (*ss)); | |
259 | ss->next = *pss; | |
260 | ss->subseg = subseg; | |
261 | ss->head = NULL; | |
262 | ss->ptail = &ss->head; | |
263 | *pss = ss; | |
264 | ||
265 | found_subseg: | |
266 | last_seg = seg; | |
267 | last_subseg = subseg; | |
268 | last_line_subseg = ss; | |
269 | ||
270 | return ss; | |
fac0d250 RH |
271 | } |
272 | ||
07a53e5c RH |
273 | /* Record an entry for LOC occurring at LABEL. */ |
274 | ||
275 | static void | |
276 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) | |
277 | { | |
278 | struct line_subseg *ss; | |
279 | struct line_entry *e; | |
280 | ||
281 | e = (struct line_entry *) xmalloc (sizeof (*e)); | |
282 | e->next = NULL; | |
283 | e->label = label; | |
284 | e->loc = *loc; | |
285 | ||
286 | ss = get_line_subseg (now_seg, now_subseg); | |
287 | *ss->ptail = e; | |
288 | ss->ptail = &e->next; | |
289 | } | |
290 | ||
436d9e46 | 291 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 292 | |
220e750f | 293 | void |
a2e22468 | 294 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 295 | { |
1ea5c325 MS |
296 | static unsigned int line = -1; |
297 | static unsigned int filenum = -1; | |
220e750f | 298 | |
07a53e5c RH |
299 | symbolS *sym; |
300 | ||
220e750f RH |
301 | /* Early out for as-yet incomplete location information. */ |
302 | if (loc->filenum == 0 || loc->line == 0) | |
303 | return; | |
304 | ||
ffa554ed GK |
305 | /* Don't emit sequences of line symbols for the same line when the |
306 | symbols apply to assembler code. It is necessary to emit | |
307 | duplicate line symbols when a compiler asks for them, because GDB | |
308 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 309 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 310 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
311 | return; |
312 | ||
313 | line = loc->line; | |
314 | filenum = loc->filenum; | |
315 | ||
07a53e5c RH |
316 | sym = symbol_temp_new (now_seg, ofs, frag_now); |
317 | dwarf2_gen_line_info_1 (sym, loc); | |
220e750f | 318 | } |
fac0d250 | 319 | |
ecea7679 RH |
320 | /* Returns the current source information. If .file directives have |
321 | been encountered, the info for the corresponding source file is | |
322 | returned. Otherwise, the info for the assembly source file is | |
323 | returned. */ | |
324 | ||
220e750f | 325 | void |
a2e22468 | 326 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
327 | { |
328 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 329 | { |
220e750f RH |
330 | char *filename; |
331 | as_where (&filename, &line->line); | |
a7ed1ca2 | 332 | line->filenum = get_filenum (filename, 0); |
220e750f | 333 | line->column = 0; |
bd0eb99b | 334 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 335 | line->isa = current.isa; |
92846e72 | 336 | line->discriminator = current.discriminator; |
fac0d250 | 337 | } |
220e750f RH |
338 | else |
339 | *line = current; | |
fac0d250 RH |
340 | } |
341 | ||
7fd3924a | 342 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
343 | machine of isa changes when assembler debug info is enabled. */ |
344 | ||
345 | void | |
346 | dwarf2_set_isa (unsigned int isa) | |
347 | { | |
348 | current.isa = isa; | |
349 | } | |
350 | ||
220e750f RH |
351 | /* Called for each machine instruction, or relatively atomic group of |
352 | machine instructions (ie built-in macro). The instruction or group | |
353 | is SIZE bytes in length. If dwarf2 line number generation is called | |
354 | for, emit a line statement appropriately. */ | |
353e2c69 | 355 | |
220e750f | 356 | void |
a2e22468 | 357 | dwarf2_emit_insn (int size) |
fac0d250 | 358 | { |
220e750f | 359 | struct dwarf2_line_info loc; |
fac0d250 | 360 | |
7fd3924a | 361 | if (!dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2) |
220e750f | 362 | return; |
7fd3924a AM |
363 | |
364 | dwarf2_where (&loc); | |
b6675117 | 365 | |
220e750f | 366 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
661ba50f BW |
367 | dwarf2_consume_line_info (); |
368 | } | |
369 | ||
370 | /* Called after the current line information has been either used with | |
371 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
372 | This resets the state of the line number information to reflect that | |
373 | it has been used. */ | |
374 | ||
375 | void | |
376 | dwarf2_consume_line_info (void) | |
377 | { | |
378 | /* Unless we generate DWARF2 debugging information for each | |
379 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 380 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
381 | |
382 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
383 | | DWARF2_FLAG_PROLOGUE_END | |
384 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 385 | current.discriminator = 0; |
220e750f | 386 | } |
fac0d250 | 387 | |
07a53e5c RH |
388 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
389 | is enabled, emit a basic block marker. */ | |
390 | ||
391 | void | |
392 | dwarf2_emit_label (symbolS *label) | |
393 | { | |
394 | struct dwarf2_line_info loc; | |
395 | ||
396 | if (!dwarf2_loc_mark_labels) | |
397 | return; | |
398 | if (S_GET_SEGMENT (label) != now_seg) | |
399 | return; | |
400 | if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)) | |
401 | return; | |
7fd3924a AM |
402 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
403 | return; | |
404 | ||
405 | dwarf2_where (&loc); | |
07a53e5c RH |
406 | |
407 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
408 | ||
07a53e5c | 409 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 410 | dwarf2_consume_line_info (); |
07a53e5c RH |
411 | } |
412 | ||
a7ed1ca2 NC |
413 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
414 | allocate it on that file table slot, otherwise return the first | |
415 | empty one. */ | |
220e750f RH |
416 | |
417 | static unsigned int | |
a2e22468 | 418 | get_filenum (const char *filename, unsigned int num) |
220e750f | 419 | { |
a7ed1ca2 NC |
420 | static unsigned int last_used, last_used_dir_len; |
421 | const char *file; | |
422 | size_t dir_len; | |
423 | unsigned int i, dir; | |
220e750f | 424 | |
a7ed1ca2 NC |
425 | if (num == 0 && last_used) |
426 | { | |
427 | if (! files[last_used].dir | |
428 | && strcmp (filename, files[last_used].filename) == 0) | |
429 | return last_used; | |
430 | if (files[last_used].dir | |
431 | && strncmp (filename, dirs[files[last_used].dir], | |
432 | last_used_dir_len) == 0 | |
433 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
434 | && strcmp (filename + last_used_dir_len + 1, | |
435 | files[last_used].filename) == 0) | |
436 | return last_used; | |
437 | } | |
220e750f | 438 | |
a7ed1ca2 NC |
439 | file = lbasename (filename); |
440 | /* Don't make empty string from / or A: from A:/ . */ | |
441 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
442 | if (file <= filename + 3) | |
443 | file = filename; | |
444 | #else | |
445 | if (file == filename + 1) | |
446 | file = filename; | |
447 | #endif | |
448 | dir_len = file - filename; | |
449 | ||
450 | dir = 0; | |
451 | if (dir_len) | |
452 | { | |
01e1a5bc | 453 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR |
a7ed1ca2 | 454 | --dir_len; |
01e1a5bc | 455 | #endif |
a7ed1ca2 | 456 | for (dir = 1; dir < dirs_in_use; ++dir) |
4dde8e61 | 457 | if (strncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
458 | && dirs[dir][dir_len] == '\0') |
459 | break; | |
460 | ||
461 | if (dir >= dirs_in_use) | |
462 | { | |
463 | if (dir >= dirs_allocated) | |
464 | { | |
465 | dirs_allocated = dir + 32; | |
466 | dirs = (char **) | |
467 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
468 | } | |
469 | ||
470 | dirs[dir] = xmalloc (dir_len + 1); | |
471 | memcpy (dirs[dir], filename, dir_len); | |
472 | dirs[dir][dir_len] = '\0'; | |
473 | dirs_in_use = dir + 1; | |
474 | } | |
475 | } | |
476 | ||
477 | if (num == 0) | |
478 | { | |
479 | for (i = 1; i < files_in_use; ++i) | |
480 | if (files[i].dir == dir | |
88b4ca40 | 481 | && files[i].filename |
a7ed1ca2 NC |
482 | && strcmp (file, files[i].filename) == 0) |
483 | { | |
484 | last_used = i; | |
485 | last_used_dir_len = dir_len; | |
486 | return i; | |
487 | } | |
488 | } | |
489 | else | |
490 | i = num; | |
220e750f RH |
491 | |
492 | if (i >= files_allocated) | |
fac0d250 | 493 | { |
249e3833 RH |
494 | unsigned int old = files_allocated; |
495 | ||
220e750f RH |
496 | files_allocated = i + 32; |
497 | files = (struct file_entry *) | |
ee515fb7 | 498 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
499 | |
500 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
501 | } |
502 | ||
a7ed1ca2 NC |
503 | files[i].filename = num ? file : xstrdup (file); |
504 | files[i].dir = dir; | |
10cd14b4 AM |
505 | if (files_in_use < i + 1) |
506 | files_in_use = i + 1; | |
220e750f | 507 | last_used = i; |
a7ed1ca2 | 508 | last_used_dir_len = dir_len; |
220e750f RH |
509 | |
510 | return i; | |
511 | } | |
fac0d250 | 512 | |
ecb4347a DJ |
513 | /* Handle two forms of .file directive: |
514 | - Pass .file "source.c" to s_app_file | |
515 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 516 | |
ecb4347a DJ |
517 | If an entry is added to the file table, return a pointer to the filename. */ |
518 | ||
519 | char * | |
a2e22468 | 520 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
521 | { |
522 | offsetT num; | |
e46d99eb | 523 | char *filename; |
220e750f RH |
524 | int filename_len; |
525 | ||
526 | /* Continue to accept a bare string and pass it off. */ | |
527 | SKIP_WHITESPACE (); | |
528 | if (*input_line_pointer == '"') | |
fac0d250 | 529 | { |
220e750f | 530 | s_app_file (0); |
ecb4347a | 531 | return NULL; |
fac0d250 RH |
532 | } |
533 | ||
220e750f RH |
534 | num = get_absolute_expression (); |
535 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
536 | if (filename == NULL) |
537 | return NULL; | |
220e750f RH |
538 | demand_empty_rest_of_line (); |
539 | ||
249e3833 | 540 | if (num < 1) |
fac0d250 | 541 | { |
0e389e77 | 542 | as_bad (_("file number less than one")); |
ecb4347a | 543 | return NULL; |
fac0d250 RH |
544 | } |
545 | ||
7cadeb2c AM |
546 | /* A .file directive implies compiler generated debug information is |
547 | being supplied. Turn off gas generated debug info. */ | |
548 | debug_type = DEBUG_NONE; | |
549 | ||
0e1a166b | 550 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 551 | { |
0e389e77 | 552 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 553 | return NULL; |
249e3833 | 554 | } |
220e750f | 555 | |
a7ed1ca2 | 556 | get_filenum (filename, num); |
ecb4347a DJ |
557 | |
558 | return filename; | |
fac0d250 RH |
559 | } |
560 | ||
220e750f | 561 | void |
a2e22468 | 562 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 563 | { |
ecea7679 RH |
564 | offsetT filenum, line; |
565 | ||
851feff8 DJ |
566 | /* If we see two .loc directives in a row, force the first one to be |
567 | output now. */ | |
7cadeb2c | 568 | if (dwarf2_loc_directive_seen) |
851feff8 DJ |
569 | dwarf2_emit_insn (0); |
570 | ||
ecea7679 RH |
571 | filenum = get_absolute_expression (); |
572 | SKIP_WHITESPACE (); | |
573 | line = get_absolute_expression (); | |
574 | ||
575 | if (filenum < 1) | |
576 | { | |
577 | as_bad (_("file number less than one")); | |
578 | return; | |
579 | } | |
580 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
581 | { | |
582 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
583 | return; | |
584 | } | |
585 | ||
586 | current.filenum = filenum; | |
587 | current.line = line; | |
92846e72 | 588 | current.discriminator = 0; |
ecea7679 RH |
589 | |
590 | #ifndef NO_LISTING | |
591 | if (listing) | |
592 | { | |
593 | if (files[filenum].dir) | |
594 | { | |
595 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
596 | size_t file_len = strlen (files[filenum].filename); | |
597 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
598 | ||
599 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 600 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
601 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
602 | cp[dir_len + file_len + 1] = '\0'; | |
603 | listing_source_file (cp); | |
604 | } | |
605 | else | |
606 | listing_source_file (files[filenum].filename); | |
607 | listing_source_line (line); | |
608 | } | |
609 | #endif | |
610 | ||
220e750f | 611 | SKIP_WHITESPACE (); |
ecea7679 RH |
612 | if (ISDIGIT (*input_line_pointer)) |
613 | { | |
614 | current.column = get_absolute_expression (); | |
615 | SKIP_WHITESPACE (); | |
616 | } | |
617 | ||
618 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 619 | { |
bd0eb99b RH |
620 | char *p, c; |
621 | offsetT value; | |
622 | ||
623 | p = input_line_pointer; | |
624 | c = get_symbol_end (); | |
625 | ||
626 | if (strcmp (p, "basic_block") == 0) | |
627 | { | |
628 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
629 | *input_line_pointer = c; | |
630 | } | |
631 | else if (strcmp (p, "prologue_end") == 0) | |
632 | { | |
633 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
634 | *input_line_pointer = c; | |
635 | } | |
636 | else if (strcmp (p, "epilogue_begin") == 0) | |
637 | { | |
638 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
639 | *input_line_pointer = c; | |
640 | } | |
641 | else if (strcmp (p, "is_stmt") == 0) | |
642 | { | |
643 | *input_line_pointer = c; | |
644 | value = get_absolute_expression (); | |
645 | if (value == 0) | |
646 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
647 | else if (value == 1) | |
648 | current.flags |= DWARF2_FLAG_IS_STMT; | |
649 | else | |
ecea7679 RH |
650 | { |
651 | as_bad (_("is_stmt value not 0 or 1")); | |
652 | return; | |
653 | } | |
bd0eb99b RH |
654 | } |
655 | else if (strcmp (p, "isa") == 0) | |
656 | { | |
7fd3924a | 657 | *input_line_pointer = c; |
bd0eb99b | 658 | value = get_absolute_expression (); |
ecea7679 | 659 | if (value >= 0) |
bd0eb99b | 660 | current.isa = value; |
ecea7679 RH |
661 | else |
662 | { | |
663 | as_bad (_("isa number less than zero")); | |
664 | return; | |
665 | } | |
bd0eb99b | 666 | } |
92846e72 CC |
667 | else if (strcmp (p, "discriminator") == 0) |
668 | { | |
669 | *input_line_pointer = c; | |
670 | value = get_absolute_expression (); | |
671 | if (value >= 0) | |
672 | current.discriminator = value; | |
673 | else | |
674 | { | |
675 | as_bad (_("discriminator less than zero")); | |
676 | return; | |
677 | } | |
678 | } | |
bd0eb99b RH |
679 | else |
680 | { | |
ecea7679 | 681 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
7fd3924a | 682 | *input_line_pointer = c; |
bd0eb99b RH |
683 | return; |
684 | } | |
685 | ||
ecea7679 | 686 | SKIP_WHITESPACE (); |
bd0eb99b RH |
687 | } |
688 | ||
689 | demand_empty_rest_of_line (); | |
1eee4adc | 690 | dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 691 | debug_type = DEBUG_NONE; |
220e750f | 692 | } |
07a53e5c RH |
693 | |
694 | void | |
695 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
696 | { | |
697 | offsetT value = get_absolute_expression (); | |
698 | ||
699 | if (value != 0 && value != 1) | |
700 | { | |
701 | as_bad (_("expected 0 or 1")); | |
702 | ignore_rest_of_line (); | |
703 | } | |
704 | else | |
705 | { | |
706 | dwarf2_loc_mark_labels = value != 0; | |
707 | demand_empty_rest_of_line (); | |
708 | } | |
709 | } | |
220e750f RH |
710 | \f |
711 | static struct frag * | |
a2e22468 | 712 | first_frag_for_seg (segT seg) |
220e750f | 713 | { |
c9049d30 | 714 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
715 | } |
716 | ||
717 | static struct frag * | |
a2e22468 | 718 | last_frag_for_seg (segT seg) |
220e750f | 719 | { |
c9049d30 | 720 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 721 | |
c9049d30 AM |
722 | while (f->frch_next != NULL) |
723 | f = f->frch_next; | |
220e750f | 724 | |
c9049d30 | 725 | return f->frch_last; |
220e750f RH |
726 | } |
727 | \f | |
728 | /* Emit a single byte into the current segment. */ | |
729 | ||
730 | static inline void | |
a2e22468 | 731 | out_byte (int byte) |
220e750f RH |
732 | { |
733 | FRAG_APPEND_1_CHAR (byte); | |
734 | } | |
735 | ||
736 | /* Emit a statement program opcode into the current segment. */ | |
737 | ||
738 | static inline void | |
a2e22468 | 739 | out_opcode (int opc) |
220e750f RH |
740 | { |
741 | out_byte (opc); | |
742 | } | |
743 | ||
744 | /* Emit a two-byte word into the current segment. */ | |
745 | ||
746 | static inline void | |
a2e22468 | 747 | out_two (int data) |
220e750f RH |
748 | { |
749 | md_number_to_chars (frag_more (2), data, 2); | |
750 | } | |
751 | ||
752 | /* Emit a four byte word into the current segment. */ | |
753 | ||
754 | static inline void | |
a2e22468 | 755 | out_four (int data) |
220e750f RH |
756 | { |
757 | md_number_to_chars (frag_more (4), data, 4); | |
758 | } | |
759 | ||
760 | /* Emit an unsigned "little-endian base 128" number. */ | |
761 | ||
fac0d250 | 762 | static void |
a2e22468 | 763 | out_uleb128 (addressT value) |
220e750f RH |
764 | { |
765 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
766 | } | |
767 | ||
92846e72 CC |
768 | /* Emit a signed "little-endian base 128" number. */ |
769 | ||
770 | static void | |
771 | out_leb128 (addressT value) | |
772 | { | |
773 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
774 | } | |
775 | ||
220e750f RH |
776 | /* Emit a tuple for .debug_abbrev. */ |
777 | ||
778 | static inline void | |
a2e22468 | 779 | out_abbrev (int name, int form) |
fac0d250 | 780 | { |
220e750f RH |
781 | out_uleb128 (name); |
782 | out_uleb128 (form); | |
783 | } | |
fac0d250 | 784 | |
220e750f | 785 | /* Get the size of a fragment. */ |
fac0d250 | 786 | |
220e750f | 787 | static offsetT |
c9049d30 | 788 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
789 | { |
790 | frchainS *fr; | |
791 | ||
792 | if (frag->fr_next) | |
793 | return frag->fr_fix; | |
794 | ||
795 | /* If a fragment is the last in the chain, special measures must be | |
796 | taken to find its size before relaxation, since it may be pending | |
797 | on some subsegment chain. */ | |
c9049d30 | 798 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 799 | if (fr->frch_last == frag) |
c5c0a210 | 800 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
801 | |
802 | abort (); | |
803 | } | |
fac0d250 | 804 | |
220e750f | 805 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 806 | |
220e750f | 807 | static void |
07a53e5c | 808 | out_set_addr (symbolS *sym) |
220e750f RH |
809 | { |
810 | expressionS expr; | |
9e3af0e7 | 811 | |
fac0d250 | 812 | out_opcode (DW_LNS_extended_op); |
220e750f | 813 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
814 | |
815 | out_opcode (DW_LNE_set_address); | |
816 | expr.X_op = O_symbol; | |
817 | expr.X_add_symbol = sym; | |
818 | expr.X_add_number = 0; | |
220e750f | 819 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
820 | } |
821 | ||
a3b75434 | 822 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 823 | static void scale_addr_delta (addressT *); |
c8970b4b | 824 | |
a3b75434 | 825 | static void |
d7342424 | 826 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
827 | { |
828 | static int printed_this = 0; | |
829 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
830 | { | |
831 | if (!printed_this) | |
832 | as_bad("unaligned opcodes detected in executable segment"); | |
833 | printed_this = 1; | |
834 | } | |
835 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
836 | } | |
837 | #else | |
838 | #define scale_addr_delta(A) | |
839 | #endif | |
840 | ||
220e750f RH |
841 | /* Encode a pair of line and address skips as efficiently as possible. |
842 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 843 | |
220e750f RH |
844 | The following two routines *must* be kept in sync. This is |
845 | enforced by making emit_inc_line_addr abort if we do not emit | |
846 | exactly the expected number of bytes. */ | |
847 | ||
848 | static int | |
a2e22468 | 849 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 850 | { |
220e750f RH |
851 | unsigned int tmp, opcode; |
852 | int len = 0; | |
fac0d250 | 853 | |
220e750f | 854 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 855 | scale_addr_delta (&addr_delta); |
220e750f RH |
856 | |
857 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
858 | We cannot use special opcodes here, since we want the end_sequence | |
859 | to emit the matrix entry. */ | |
860 | if (line_delta == INT_MAX) | |
fac0d250 | 861 | { |
220e750f RH |
862 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
863 | len = 1; | |
fac0d250 | 864 | else |
220e750f RH |
865 | len = 1 + sizeof_leb128 (addr_delta, 0); |
866 | return len + 3; | |
fac0d250 | 867 | } |
fac0d250 | 868 | |
220e750f RH |
869 | /* Bias the line delta by the base. */ |
870 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 871 | |
220e750f RH |
872 | /* If the line increment is out of range of a special opcode, we |
873 | must encode it with DW_LNS_advance_line. */ | |
874 | if (tmp >= DWARF2_LINE_RANGE) | |
875 | { | |
876 | len = 1 + sizeof_leb128 (line_delta, 1); | |
877 | line_delta = 0; | |
878 | tmp = 0 - DWARF2_LINE_BASE; | |
879 | } | |
fac0d250 | 880 | |
220e750f RH |
881 | /* Bias the opcode by the special opcode base. */ |
882 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 883 | |
220e750f RH |
884 | /* Avoid overflow when addr_delta is large. */ |
885 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
886 | { | |
887 | /* Try using a special opcode. */ | |
888 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
889 | if (opcode <= 255) | |
890 | return len + 1; | |
891 | ||
892 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
893 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
894 | if (opcode <= 255) | |
895 | return len + 2; | |
896 | } | |
897 | ||
898 | /* Otherwise use DW_LNS_advance_pc. */ | |
899 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
900 | ||
901 | /* DW_LNS_copy or special opcode. */ | |
902 | len += 1; | |
903 | ||
904 | return len; | |
905 | } | |
fac0d250 | 906 | |
220e750f | 907 | static void |
a2e22468 | 908 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
909 | { |
910 | unsigned int tmp, opcode; | |
911 | int need_copy = 0; | |
912 | char *end = p + len; | |
fac0d250 | 913 | |
07a53e5c RH |
914 | /* Line number sequences cannot go backward in addresses. This means |
915 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 916 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 917 | |
220e750f | 918 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
919 | scale_addr_delta (&addr_delta); |
920 | ||
220e750f RH |
921 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
922 | We cannot use special opcodes here, since we want the end_sequence | |
923 | to emit the matrix entry. */ | |
924 | if (line_delta == INT_MAX) | |
fac0d250 | 925 | { |
220e750f RH |
926 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
927 | *p++ = DW_LNS_const_add_pc; | |
928 | else | |
fac0d250 | 929 | { |
220e750f RH |
930 | *p++ = DW_LNS_advance_pc; |
931 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 932 | } |
220e750f RH |
933 | |
934 | *p++ = DW_LNS_extended_op; | |
935 | *p++ = 1; | |
936 | *p++ = DW_LNE_end_sequence; | |
937 | goto done; | |
fac0d250 RH |
938 | } |
939 | ||
220e750f RH |
940 | /* Bias the line delta by the base. */ |
941 | tmp = line_delta - DWARF2_LINE_BASE; | |
942 | ||
943 | /* If the line increment is out of range of a special opcode, we | |
944 | must encode it with DW_LNS_advance_line. */ | |
945 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 946 | { |
220e750f RH |
947 | *p++ = DW_LNS_advance_line; |
948 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 949 | |
220e750f RH |
950 | line_delta = 0; |
951 | tmp = 0 - DWARF2_LINE_BASE; | |
952 | need_copy = 1; | |
953 | } | |
fac0d250 | 954 | |
bd0eb99b RH |
955 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
956 | special opcode. */ | |
957 | if (line_delta == 0 && addr_delta == 0) | |
958 | { | |
959 | *p++ = DW_LNS_copy; | |
960 | goto done; | |
961 | } | |
962 | ||
220e750f RH |
963 | /* Bias the opcode by the special opcode base. */ |
964 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 965 | |
220e750f RH |
966 | /* Avoid overflow when addr_delta is large. */ |
967 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 968 | { |
220e750f RH |
969 | /* Try using a special opcode. */ |
970 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
971 | if (opcode <= 255) | |
972 | { | |
973 | *p++ = opcode; | |
974 | goto done; | |
975 | } | |
976 | ||
977 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
978 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
979 | if (opcode <= 255) | |
fac0d250 | 980 | { |
220e750f RH |
981 | *p++ = DW_LNS_const_add_pc; |
982 | *p++ = opcode; | |
983 | goto done; | |
fac0d250 RH |
984 | } |
985 | } | |
220e750f RH |
986 | |
987 | /* Otherwise use DW_LNS_advance_pc. */ | |
988 | *p++ = DW_LNS_advance_pc; | |
989 | p += output_leb128 (p, addr_delta, 0); | |
990 | ||
991 | if (need_copy) | |
992 | *p++ = DW_LNS_copy; | |
fac0d250 | 993 | else |
220e750f | 994 | *p++ = tmp; |
fac0d250 | 995 | |
220e750f | 996 | done: |
9c2799c2 | 997 | gas_assert (p == end); |
220e750f | 998 | } |
a8316fe2 | 999 | |
220e750f | 1000 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1001 | |
220e750f | 1002 | static void |
a2e22468 | 1003 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1004 | { |
1005 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1006 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1007 | } | |
9de8d8f1 | 1008 | |
1737851b BW |
1009 | /* Write out an alternative form of line and address skips using |
1010 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1011 | line and address information, but it is required if linker relaxation |
1012 | could change the code offsets. The following two routines *must* be | |
1013 | kept in sync. */ | |
1737851b | 1014 | |
7ddd14de BW |
1015 | static int |
1016 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1017 | { |
7ddd14de | 1018 | int len = 0; |
1737851b BW |
1019 | |
1020 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1021 | if (line_delta != INT_MAX) |
1022 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1023 | ||
1024 | if (addr_delta > 50000) | |
1025 | { | |
1026 | /* DW_LNS_extended_op */ | |
1027 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1028 | /* DW_LNE_set_address */ | |
1029 | len += 1 + sizeof_address; | |
1030 | } | |
1031 | else | |
1032 | /* DW_LNS_fixed_advance_pc */ | |
1033 | len += 3; | |
1034 | ||
1737851b | 1035 | if (line_delta == INT_MAX) |
7ddd14de BW |
1036 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1037 | len += 3; | |
1038 | else | |
1039 | /* DW_LNS_copy */ | |
1040 | len += 1; | |
1041 | ||
1042 | return len; | |
1043 | } | |
1044 | ||
1045 | static void | |
1046 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1047 | char *p, int len) | |
1048 | { | |
1049 | expressionS *exp; | |
1050 | segT line_seg; | |
1051 | char *end = p + len; | |
1052 | ||
1053 | /* Line number sequences cannot go backward in addresses. This means | |
1054 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1055 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de BW |
1056 | |
1057 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
1058 | if (line_delta != INT_MAX) | |
1059 | { | |
1060 | *p++ = DW_LNS_advance_line; | |
1061 | p += output_leb128 (p, line_delta, 1); | |
1062 | } | |
1063 | ||
1064 | exp = symbol_get_value_expression (frag->fr_symbol); | |
1065 | line_seg = subseg_get (".debug_line", 0); | |
1066 | ||
1067 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1068 | advance the address by at most 64K. Linker relaxation (without | |
1069 | which this function would not be used) could change the operand by | |
1070 | an unknown amount. If the address increment is getting close to | |
1071 | the limit, just reset the address. */ | |
1072 | if (addr_delta > 50000) | |
1737851b | 1073 | { |
7ddd14de BW |
1074 | symbolS *to_sym; |
1075 | expressionS expr; | |
1076 | ||
9c2799c2 | 1077 | gas_assert (exp->X_op = O_subtract); |
7ddd14de BW |
1078 | to_sym = exp->X_add_symbol; |
1079 | ||
1080 | *p++ = DW_LNS_extended_op; | |
1081 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1082 | *p++ = DW_LNE_set_address; | |
1083 | expr.X_op = O_symbol; | |
1737851b | 1084 | expr.X_add_symbol = to_sym; |
1737851b | 1085 | expr.X_add_number = 0; |
7ddd14de BW |
1086 | subseg_change (line_seg, 0); |
1087 | emit_expr_fix (&expr, sizeof_address, frag, p); | |
1088 | p += sizeof_address; | |
1089 | } | |
1090 | else | |
1091 | { | |
1092 | *p++ = DW_LNS_fixed_advance_pc; | |
1093 | subseg_change (line_seg, 0); | |
1094 | emit_expr_fix (exp, 2, frag, p); | |
1095 | p += 2; | |
1737851b BW |
1096 | } |
1097 | ||
7ddd14de BW |
1098 | if (line_delta == INT_MAX) |
1099 | { | |
1100 | *p++ = DW_LNS_extended_op; | |
1101 | *p++ = 1; | |
1102 | *p++ = DW_LNE_end_sequence; | |
1103 | } | |
1104 | else | |
1105 | *p++ = DW_LNS_copy; | |
1737851b | 1106 | |
9c2799c2 | 1107 | gas_assert (p == end); |
1737851b BW |
1108 | } |
1109 | ||
220e750f RH |
1110 | /* Generate a variant frag that we can use to relax address/line |
1111 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1112 | |
220e750f | 1113 | static void |
07a53e5c | 1114 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1115 | { |
220e750f RH |
1116 | expressionS expr; |
1117 | int max_chars; | |
6576f0b5 | 1118 | |
220e750f RH |
1119 | expr.X_op = O_subtract; |
1120 | expr.X_add_symbol = to_sym; | |
1121 | expr.X_op_symbol = from_sym; | |
1122 | expr.X_add_number = 0; | |
fac0d250 | 1123 | |
220e750f RH |
1124 | /* The maximum size of the frag is the line delta with a maximum |
1125 | sized address delta. */ | |
7ddd14de BW |
1126 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1127 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1128 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1129 | else | |
1130 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1131 | |
220e750f RH |
1132 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
1133 | make_expr_symbol (&expr), line_delta, NULL); | |
1134 | } | |
fac0d250 | 1135 | |
220e750f RH |
1136 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1137 | based on the current values of the symbols. It is called before | |
1138 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1139 | |
220e750f | 1140 | int |
a2e22468 | 1141 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1142 | { |
1143 | offsetT addr_delta; | |
1144 | int size; | |
fac0d250 | 1145 | |
6386f3a7 | 1146 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1147 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1148 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1149 | else | |
1150 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1151 | |
220e750f | 1152 | frag->fr_subtype = size; |
fac0d250 | 1153 | |
220e750f RH |
1154 | return size; |
1155 | } | |
1156 | ||
1157 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1158 | current values of the symbols. fr_subtype is the current length | |
1159 | of the frag. This returns the change in frag length. */ | |
1160 | ||
1161 | int | |
a2e22468 | 1162 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1163 | { |
1164 | int old_size, new_size; | |
fac0d250 | 1165 | |
220e750f RH |
1166 | old_size = frag->fr_subtype; |
1167 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1168 | |
220e750f | 1169 | return new_size - old_size; |
fac0d250 RH |
1170 | } |
1171 | ||
220e750f RH |
1172 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1173 | fill frag. This is called after all relaxation has been done. | |
1174 | fr_subtype will be the desired length of the frag. */ | |
1175 | ||
1176 | void | |
a2e22468 | 1177 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1178 | { |
220e750f RH |
1179 | offsetT addr_diff; |
1180 | ||
6386f3a7 | 1181 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 1182 | |
220e750f RH |
1183 | /* fr_var carries the max_chars that we created the fragment with. |
1184 | fr_subtype carries the current expected length. We must, of | |
1185 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1186 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1187 | |
7ddd14de BW |
1188 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1189 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1190 | frag->fr_literal + frag->fr_fix, | |
1191 | frag->fr_subtype); | |
1192 | else | |
1193 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1194 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1195 | |
1196 | frag->fr_fix += frag->fr_subtype; | |
1197 | frag->fr_type = rs_fill; | |
1198 | frag->fr_var = 0; | |
1199 | frag->fr_offset = 0; | |
1200 | } | |
1201 | ||
1202 | /* Generate .debug_line content for the chain of line number entries | |
1203 | beginning at E, for segment SEG. */ | |
1204 | ||
1205 | static void | |
a2e22468 | 1206 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1207 | { |
1208 | unsigned filenum = 1; | |
1209 | unsigned line = 1; | |
1210 | unsigned column = 0; | |
bd0eb99b RH |
1211 | unsigned isa = 0; |
1212 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1213 | fragS *last_frag = NULL, *frag; |
1214 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1215 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1216 | struct line_entry *next; |
1217 | ||
fead5cd9 | 1218 | do |
fac0d250 | 1219 | { |
07a53e5c | 1220 | int line_delta; |
220e750f RH |
1221 | |
1222 | if (filenum != e->loc.filenum) | |
fac0d250 | 1223 | { |
220e750f RH |
1224 | filenum = e->loc.filenum; |
1225 | out_opcode (DW_LNS_set_file); | |
1226 | out_uleb128 (filenum); | |
220e750f RH |
1227 | } |
1228 | ||
1229 | if (column != e->loc.column) | |
1230 | { | |
1231 | column = e->loc.column; | |
1232 | out_opcode (DW_LNS_set_column); | |
1233 | out_uleb128 (column); | |
220e750f RH |
1234 | } |
1235 | ||
92846e72 CC |
1236 | if (e->loc.discriminator != 0) |
1237 | { | |
1238 | out_opcode (DW_LNS_extended_op); | |
1239 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1240 | out_opcode (DW_LNE_set_discriminator); | |
1241 | out_uleb128 (e->loc.discriminator); | |
1242 | } | |
1243 | ||
bd0eb99b RH |
1244 | if (isa != e->loc.isa) |
1245 | { | |
1246 | isa = e->loc.isa; | |
1247 | out_opcode (DW_LNS_set_isa); | |
1248 | out_uleb128 (isa); | |
bd0eb99b RH |
1249 | } |
1250 | ||
1251 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1252 | { |
1253 | flags = e->loc.flags; | |
1254 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1255 | } |
1256 | ||
bd0eb99b | 1257 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1258 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1259 | |
bd0eb99b | 1260 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1261 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1262 | |
1263 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1264 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1265 | |
fb81275c JM |
1266 | /* Don't try to optimize away redundant entries; gdb wants two |
1267 | entries for a function where the code starts on the same line as | |
1268 | the {, and there's no way to identify that case here. Trust gcc | |
1269 | to optimize appropriately. */ | |
07a53e5c RH |
1270 | line_delta = e->loc.line - line; |
1271 | lab = e->label; | |
1272 | frag = symbol_get_frag (lab); | |
1273 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1274 | |
07a53e5c | 1275 | if (last_frag == NULL) |
220e750f | 1276 | { |
07a53e5c RH |
1277 | out_set_addr (lab); |
1278 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1279 | } |
7ddd14de | 1280 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1281 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1282 | else | |
1283 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1284 | ||
1285 | line = e->loc.line; | |
1286 | last_lab = lab; | |
1287 | last_frag = frag; | |
1288 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1289 | |
1290 | next = e->next; | |
1291 | free (e); | |
1292 | e = next; | |
fac0d250 | 1293 | } |
fead5cd9 | 1294 | while (e); |
353e2c69 | 1295 | |
220e750f | 1296 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1297 | frag = last_frag_for_seg (seg); |
c9049d30 | 1298 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1299 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1300 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1301 | else |
07a53e5c RH |
1302 | { |
1303 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1304 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1305 | } | |
fac0d250 RH |
1306 | } |
1307 | ||
220e750f RH |
1308 | /* Emit the directory and file tables for .debug_line. */ |
1309 | ||
fac0d250 | 1310 | static void |
a2e22468 | 1311 | out_file_list (void) |
fac0d250 RH |
1312 | { |
1313 | size_t size; | |
3d6b762c | 1314 | const char *dir; |
fac0d250 | 1315 | char *cp; |
220e750f RH |
1316 | unsigned int i; |
1317 | ||
a7ed1ca2 NC |
1318 | /* Emit directory list. */ |
1319 | for (i = 1; i < dirs_in_use; ++i) | |
1320 | { | |
3d6b762c JM |
1321 | dir = remap_debug_filename (dirs[i]); |
1322 | size = strlen (dir) + 1; | |
a7ed1ca2 | 1323 | cp = frag_more (size); |
3d6b762c | 1324 | memcpy (cp, dir, size); |
a7ed1ca2 NC |
1325 | } |
1326 | /* Terminate it. */ | |
220e750f | 1327 | out_byte ('\0'); |
fac0d250 | 1328 | |
220e750f | 1329 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1330 | { |
01e1a5bc NC |
1331 | const char *fullfilename; |
1332 | ||
249e3833 RH |
1333 | if (files[i].filename == NULL) |
1334 | { | |
0e389e77 | 1335 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1336 | /* Prevent a crash later, particularly for file 1. */ |
1337 | files[i].filename = ""; | |
249e3833 RH |
1338 | continue; |
1339 | } | |
1340 | ||
01e1a5bc NC |
1341 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
1342 | files[i].dir ? dirs [files [i].dir] : ""); | |
1343 | size = strlen (fullfilename) + 1; | |
fac0d250 | 1344 | cp = frag_more (size); |
01e1a5bc | 1345 | memcpy (cp, fullfilename, size); |
fac0d250 | 1346 | |
220e750f | 1347 | out_uleb128 (files[i].dir); /* directory number */ |
01e1a5bc NC |
1348 | /* Output the last modification timestamp. */ |
1349 | out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename, | |
1350 | files[i].dir ? dirs [files [i].dir] : "")); | |
1351 | /* Output the filesize. */ | |
1352 | out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename, | |
1353 | files[i].dir ? dirs [files [i].dir] : "")); | |
fac0d250 | 1354 | } |
353e2c69 KH |
1355 | |
1356 | /* Terminate filename list. */ | |
1357 | out_byte (0); | |
fac0d250 RH |
1358 | } |
1359 | ||
413a266c AM |
1360 | /* Switch to SEC and output a header length field. Return the size of |
1361 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
1362 | to the end of the section. */ | |
1363 | ||
1364 | static int | |
1365 | out_header (asection *sec, expressionS *expr) | |
1366 | { | |
1367 | symbolS *start_sym; | |
1368 | symbolS *end_sym; | |
1369 | ||
1370 | subseg_set (sec, 0); | |
1371 | start_sym = symbol_temp_new_now ();; | |
1372 | end_sym = symbol_temp_make (); | |
1373 | ||
1374 | /* Total length of the information. */ | |
1375 | expr->X_op = O_subtract; | |
1376 | expr->X_add_symbol = end_sym; | |
1377 | expr->X_op_symbol = start_sym; | |
1378 | ||
1379 | switch (DWARF2_FORMAT (sec)) | |
1380 | { | |
1381 | case dwarf2_format_32bit: | |
1382 | expr->X_add_number = -4; | |
1383 | emit_expr (expr, 4); | |
1384 | return 4; | |
1385 | ||
1386 | case dwarf2_format_64bit: | |
1387 | expr->X_add_number = -12; | |
1388 | out_four (-1); | |
1389 | emit_expr (expr, 8); | |
1390 | return 8; | |
1391 | ||
1392 | case dwarf2_format_64bit_irix: | |
1393 | expr->X_add_number = -8; | |
1394 | emit_expr (expr, 8); | |
1395 | return 8; | |
1396 | } | |
1397 | ||
1398 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1399 | return 0; | |
1400 | } | |
1401 | ||
220e750f RH |
1402 | /* Emit the collected .debug_line data. */ |
1403 | ||
1404 | static void | |
a2e22468 | 1405 | out_debug_line (segT line_seg) |
220e750f RH |
1406 | { |
1407 | expressionS expr; | |
220e750f RH |
1408 | symbolS *prologue_end; |
1409 | symbolS *line_end; | |
1410 | struct line_seg *s; | |
14e777e0 | 1411 | int sizeof_offset; |
220e750f | 1412 | |
413a266c AM |
1413 | sizeof_offset = out_header (line_seg, &expr); |
1414 | line_end = expr.X_add_symbol; | |
220e750f RH |
1415 | |
1416 | /* Version. */ | |
1417 | out_two (2); | |
1418 | ||
1419 | /* Length of the prologue following this length. */ | |
413a266c | 1420 | prologue_end = symbol_temp_make (); |
220e750f | 1421 | expr.X_add_symbol = prologue_end; |
220e750f | 1422 | expr.X_add_number = - (4 + 2 + 4); |
14e777e0 | 1423 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1424 | |
1425 | /* Parameters of the state machine. */ | |
1426 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1427 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1428 | out_byte (DWARF2_LINE_BASE); | |
1429 | out_byte (DWARF2_LINE_RANGE); | |
1430 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1431 | ||
1432 | /* Standard opcode lengths. */ | |
1433 | out_byte (0); /* DW_LNS_copy */ | |
1434 | out_byte (1); /* DW_LNS_advance_pc */ | |
1435 | out_byte (1); /* DW_LNS_advance_line */ | |
1436 | out_byte (1); /* DW_LNS_set_file */ | |
1437 | out_byte (1); /* DW_LNS_set_column */ | |
1438 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1439 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1440 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1441 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1442 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1443 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1444 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1445 | |
1446 | out_file_list (); | |
1447 | ||
b7d6ed97 | 1448 | symbol_set_value_now (prologue_end); |
220e750f RH |
1449 | |
1450 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1451 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1452 | process_entries (s->seg, s->head->head); |
1453 | ||
b7d6ed97 | 1454 | symbol_set_value_now (line_end); |
220e750f RH |
1455 | } |
1456 | ||
802f5d9e NC |
1457 | static void |
1458 | out_debug_ranges (segT ranges_seg) | |
1459 | { | |
1460 | unsigned int addr_size = sizeof_address; | |
1461 | struct line_seg *s; | |
1462 | expressionS expr; | |
1463 | unsigned int i; | |
1464 | ||
1465 | subseg_set (ranges_seg, 0); | |
1466 | ||
1467 | /* Base Address Entry. */ | |
7fd3924a | 1468 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1469 | out_byte (0xff); |
7fd3924a | 1470 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1471 | out_byte (0); |
1472 | ||
1473 | /* Range List Entry. */ | |
1474 | for (s = all_segs; s; s = s->next) | |
1475 | { | |
1476 | fragS *frag; | |
1477 | symbolS *beg, *end; | |
1478 | ||
1479 | frag = first_frag_for_seg (s->seg); | |
1480 | beg = symbol_temp_new (s->seg, 0, frag); | |
1481 | s->text_start = beg; | |
1482 | ||
1483 | frag = last_frag_for_seg (s->seg); | |
1484 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
1485 | s->text_end = end; | |
1486 | ||
1487 | expr.X_op = O_symbol; | |
1488 | expr.X_add_symbol = beg; | |
1489 | expr.X_add_number = 0; | |
1490 | emit_expr (&expr, addr_size); | |
1491 | ||
1492 | expr.X_op = O_symbol; | |
1493 | expr.X_add_symbol = end; | |
1494 | expr.X_add_number = 0; | |
1495 | emit_expr (&expr, addr_size); | |
1496 | } | |
1497 | ||
1498 | /* End of Range Entry. */ | |
7fd3924a | 1499 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1500 | out_byte (0); |
7fd3924a | 1501 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1502 | out_byte (0); |
1503 | } | |
1504 | ||
220e750f RH |
1505 | /* Emit data for .debug_aranges. */ |
1506 | ||
58b5739a | 1507 | static void |
a2e22468 | 1508 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1509 | { |
220e750f | 1510 | unsigned int addr_size = sizeof_address; |
220e750f RH |
1511 | struct line_seg *s; |
1512 | expressionS expr; | |
413a266c | 1513 | symbolS *aranges_end; |
220e750f | 1514 | char *p; |
413a266c | 1515 | int sizeof_offset; |
fac0d250 | 1516 | |
413a266c AM |
1517 | sizeof_offset = out_header (aranges_seg, &expr); |
1518 | aranges_end = expr.X_add_symbol; | |
fac0d250 | 1519 | |
220e750f RH |
1520 | /* Version. */ |
1521 | out_two (2); | |
4dc7ead9 | 1522 | |
220e750f | 1523 | /* Offset to .debug_info. */ |
413a266c | 1524 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
220e750f RH |
1525 | |
1526 | /* Size of an address (offset portion). */ | |
1527 | out_byte (addr_size); | |
1528 | ||
1529 | /* Size of a segment descriptor. */ | |
1530 | out_byte (0); | |
1531 | ||
1532 | /* Align the header. */ | |
413a266c | 1533 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1534 | |
ee515fb7 | 1535 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1536 | { |
1537 | fragS *frag; | |
1538 | symbolS *beg, *end; | |
1539 | ||
1540 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1541 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1542 | s->text_start = beg; |
1543 | ||
1544 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 1545 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
1546 | s->text_end = end; |
1547 | ||
1548 | expr.X_op = O_symbol; | |
1549 | expr.X_add_symbol = beg; | |
1550 | expr.X_add_number = 0; | |
1551 | emit_expr (&expr, addr_size); | |
1552 | ||
1553 | expr.X_op = O_subtract; | |
1554 | expr.X_add_symbol = end; | |
1555 | expr.X_op_symbol = beg; | |
1556 | expr.X_add_number = 0; | |
1557 | emit_expr (&expr, addr_size); | |
1558 | } | |
4dc7ead9 | 1559 | |
220e750f RH |
1560 | p = frag_more (2 * addr_size); |
1561 | md_number_to_chars (p, 0, addr_size); | |
1562 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c AM |
1563 | |
1564 | symbol_set_value_now (aranges_end); | |
4dc7ead9 RH |
1565 | } |
1566 | ||
220e750f RH |
1567 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1568 | sync with out_debug_info below. */ | |
fac0d250 | 1569 | |
220e750f | 1570 | static void |
413a266c AM |
1571 | out_debug_abbrev (segT abbrev_seg, |
1572 | segT info_seg ATTRIBUTE_UNUSED, | |
1573 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f RH |
1574 | { |
1575 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1576 | |
220e750f RH |
1577 | out_uleb128 (1); |
1578 | out_uleb128 (DW_TAG_compile_unit); | |
1579 | out_byte (DW_CHILDREN_no); | |
413a266c AM |
1580 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) |
1581 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1582 | else | |
1583 | out_abbrev (DW_AT_stmt_list, DW_FORM_data8); | |
220e750f | 1584 | if (all_segs->next == NULL) |
4dc7ead9 | 1585 | { |
220e750f RH |
1586 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1587 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1588 | } | |
802f5d9e NC |
1589 | else |
1590 | { | |
413a266c | 1591 | if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit) |
802f5d9e NC |
1592 | out_abbrev (DW_AT_ranges, DW_FORM_data4); |
1593 | else | |
1594 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
1595 | } | |
48b91938 | 1596 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1597 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1598 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1599 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1600 | out_abbrev (0, 0); | |
a987bfc9 RH |
1601 | |
1602 | /* Terminate the abbreviations for this compilation unit. */ | |
1603 | out_byte (0); | |
220e750f | 1604 | } |
4dc7ead9 | 1605 | |
220e750f | 1606 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1607 | |
220e750f | 1608 | static void |
802f5d9e | 1609 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) |
220e750f RH |
1610 | { |
1611 | char producer[128]; | |
3d6b762c JM |
1612 | const char *comp_dir; |
1613 | const char *dirname; | |
220e750f | 1614 | expressionS expr; |
220e750f RH |
1615 | symbolS *info_end; |
1616 | char *p; | |
1617 | int len; | |
14e777e0 | 1618 | int sizeof_offset; |
4dc7ead9 | 1619 | |
413a266c AM |
1620 | sizeof_offset = out_header (info_seg, &expr); |
1621 | info_end = expr.X_add_symbol; | |
4dc7ead9 | 1622 | |
220e750f RH |
1623 | /* DWARF version. */ |
1624 | out_two (2); | |
4dc7ead9 | 1625 | |
220e750f | 1626 | /* .debug_abbrev offset */ |
6174d9c8 | 1627 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1628 | |
220e750f RH |
1629 | /* Target address size. */ |
1630 | out_byte (sizeof_address); | |
fac0d250 | 1631 | |
220e750f RH |
1632 | /* DW_TAG_compile_unit DIE abbrev */ |
1633 | out_uleb128 (1); | |
fac0d250 | 1634 | |
220e750f | 1635 | /* DW_AT_stmt_list */ |
413a266c AM |
1636 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
1637 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
1638 | ? 4 : 8)); | |
fac0d250 | 1639 | |
802f5d9e | 1640 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 1641 | if (all_segs->next == NULL) |
58b5739a | 1642 | { |
220e750f RH |
1643 | /* DW_AT_low_pc */ |
1644 | expr.X_op = O_symbol; | |
1645 | expr.X_add_symbol = all_segs->text_start; | |
1646 | expr.X_add_number = 0; | |
1647 | emit_expr (&expr, sizeof_address); | |
1648 | ||
1649 | /* DW_AT_high_pc */ | |
1650 | expr.X_op = O_symbol; | |
1651 | expr.X_add_symbol = all_segs->text_end; | |
1652 | expr.X_add_number = 0; | |
1653 | emit_expr (&expr, sizeof_address); | |
58b5739a | 1654 | } |
802f5d9e NC |
1655 | else |
1656 | { | |
eb1fe072 NC |
1657 | /* This attribute is emitted if the code is disjoint. */ |
1658 | /* DW_AT_ranges. */ | |
1659 | TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset); | |
802f5d9e | 1660 | } |
58b5739a | 1661 | |
48b91938 RH |
1662 | /* DW_AT_name. We don't have the actual file name that was present |
1663 | on the command line, so assume files[1] is the main input file. | |
1664 | We're not supposed to get called unless at least one line number | |
1665 | entry was emitted, so this should always be defined. */ | |
7fd3924a | 1666 | if (files_in_use == 0) |
48b91938 | 1667 | abort (); |
a7ed1ca2 NC |
1668 | if (files[1].dir) |
1669 | { | |
3d6b762c JM |
1670 | dirname = remap_debug_filename (dirs[files[1].dir]); |
1671 | len = strlen (dirname); | |
198f1251 TG |
1672 | #ifdef TE_VMS |
1673 | /* Already has trailing slash. */ | |
1674 | p = frag_more (len); | |
1675 | memcpy (p, dirname, len); | |
1676 | #else | |
a7ed1ca2 | 1677 | p = frag_more (len + 1); |
3d6b762c | 1678 | memcpy (p, dirname, len); |
56487c55 | 1679 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 1680 | #endif |
a7ed1ca2 | 1681 | } |
48b91938 RH |
1682 | len = strlen (files[1].filename) + 1; |
1683 | p = frag_more (len); | |
1684 | memcpy (p, files[1].filename, len); | |
1685 | ||
220e750f | 1686 | /* DW_AT_comp_dir */ |
3d6b762c | 1687 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
1688 | len = strlen (comp_dir) + 1; |
1689 | p = frag_more (len); | |
1690 | memcpy (p, comp_dir, len); | |
fac0d250 | 1691 | |
220e750f RH |
1692 | /* DW_AT_producer */ |
1693 | sprintf (producer, "GNU AS %s", VERSION); | |
1694 | len = strlen (producer) + 1; | |
1695 | p = frag_more (len); | |
1696 | memcpy (p, producer, len); | |
fac0d250 | 1697 | |
220e750f RH |
1698 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1699 | dwarf2 draft has no standard code for assembler. */ | |
1700 | out_two (DW_LANG_Mips_Assembler); | |
1701 | ||
b7d6ed97 | 1702 | symbol_set_value_now (info_end); |
fac0d250 RH |
1703 | } |
1704 | ||
c6cb92c5 NS |
1705 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1706 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
1707 | file has a non-empty .debug_info section. If we emit .debug_line, | |
1708 | and the .debug_info section is empty, we also emit .debug_info, | |
1709 | .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if | |
1710 | there were any .file/.loc directives, or --gdwarf2 was given and | |
1711 | there were any located instructions emitted. */ | |
1712 | ||
fac0d250 | 1713 | void |
a2e22468 | 1714 | dwarf2_finish (void) |
fac0d250 | 1715 | { |
220e750f RH |
1716 | segT line_seg; |
1717 | struct line_seg *s; | |
c6cb92c5 NS |
1718 | segT info_seg; |
1719 | int emit_other_sections = 0; | |
1720 | ||
1721 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1722 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1723 | |
c6cb92c5 NS |
1724 | if (!all_segs && emit_other_sections) |
1725 | /* There is no line information and no non-empty .debug_info | |
1726 | section. */ | |
220e750f | 1727 | return; |
fac0d250 | 1728 | |
220e750f | 1729 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1730 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1731 | |
220e750f RH |
1732 | /* Create and switch to the line number section. */ |
1733 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1734 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1735 | |
220e750f | 1736 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1737 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1738 | { |
220e750f RH |
1739 | struct line_subseg *ss = s->head; |
1740 | struct line_entry **ptail = ss->ptail; | |
1741 | ||
1742 | while ((ss = ss->next) != NULL) | |
1743 | { | |
1744 | *ptail = ss->head; | |
1745 | ptail = ss->ptail; | |
1746 | } | |
fac0d250 | 1747 | } |
85a39694 | 1748 | |
220e750f | 1749 | out_debug_line (line_seg); |
85a39694 | 1750 | |
c6cb92c5 NS |
1751 | /* If this is assembler generated line info, and there is no |
1752 | debug_info already, we need .debug_info and .debug_abbrev | |
1753 | sections as well. */ | |
1754 | if (emit_other_sections) | |
220e750f RH |
1755 | { |
1756 | segT abbrev_seg; | |
220e750f | 1757 | segT aranges_seg; |
802f5d9e | 1758 | segT ranges_seg; |
4dc7ead9 | 1759 | |
9c2799c2 | 1760 | gas_assert (all_segs); |
7fd3924a | 1761 | |
220e750f RH |
1762 | info_seg = subseg_new (".debug_info", 0); |
1763 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1764 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1765 | |
8a7140c3 NC |
1766 | bfd_set_section_flags (stdoutput, info_seg, |
1767 | SEC_READONLY | SEC_DEBUGGING); | |
1768 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1769 | SEC_READONLY | SEC_DEBUGGING); | |
1770 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1771 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1772 | |
ee515fb7 | 1773 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1774 | |
802f5d9e NC |
1775 | if (all_segs->next == NULL) |
1776 | ranges_seg = NULL; | |
1777 | else | |
1778 | { | |
1779 | ranges_seg = subseg_new (".debug_ranges", 0); | |
7fd3924a | 1780 | bfd_set_section_flags (stdoutput, ranges_seg, |
802f5d9e NC |
1781 | SEC_READONLY | SEC_DEBUGGING); |
1782 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
1783 | out_debug_ranges (ranges_seg); | |
1784 | } | |
1785 | ||
220e750f | 1786 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 1787 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
802f5d9e | 1788 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg); |
220e750f | 1789 | } |
85a39694 | 1790 | } |