Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
10cd14b4 | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
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 | |
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" | |
ecea7679 RH |
27 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
28 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] | |
bd0eb99b | 29 | */ |
fac0d250 | 30 | |
fac0d250 | 31 | #include "as.h" |
bd0eb99b | 32 | #include "safe-ctype.h" |
92eb7b32 | 33 | |
42dbf88c NC |
34 | #ifdef HAVE_LIMITS_H |
35 | #include <limits.h> | |
92625c16 | 36 | #else |
6717891c NC |
37 | #ifdef HAVE_SYS_PARAM_H |
38 | #include <sys/param.h> | |
39 | #endif | |
6256f9dd | 40 | #ifndef INT_MAX |
ee515fb7 | 41 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 42 | #endif |
b8f080d6 | 43 | #endif |
42dbf88c | 44 | |
70658493 | 45 | #include "dwarf2dbg.h" |
a7ed1ca2 | 46 | #include <filenames.h> |
70658493 | 47 | |
56487c55 NC |
48 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
49 | /* We need to decide which character to use as a directory separator. | |
50 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
51 | necessarily mean that the backslash character is the one to use. | |
52 | Some environments, eg Cygwin, can support both naming conventions. | |
53 | So we use the heuristic that we only need to use the backslash if | |
54 | the path is an absolute path starting with a DOS style drive | |
55 | selector. eg C: or D: */ | |
56 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
57 | do \ | |
58 | { \ | |
59 | if (offset > 1 \ | |
60 | && string[0] != 0 \ | |
61 | && string[1] == ':') \ | |
62 | string [offset] = '\\'; \ | |
63 | else \ | |
64 | string [offset] = '/'; \ | |
65 | } \ | |
66 | while (0) | |
67 | #else | |
68 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
69 | #endif | |
70 | ||
14e777e0 | 71 | #ifndef DWARF2_FORMAT |
9605f328 | 72 | # define DWARF2_FORMAT() dwarf2_format_32bit |
14e777e0 KB |
73 | #endif |
74 | ||
9605f328 | 75 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 76 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
77 | #endif |
78 | ||
fac0d250 RH |
79 | #include "subsegs.h" |
80 | ||
d9ac5a3b | 81 | #include "elf/dwarf2.h" |
fac0d250 | 82 | |
fac0d250 RH |
83 | /* Since we can't generate the prolog until the body is complete, we |
84 | use three different subsegments for .debug_line: one holding the | |
85 | prolog, one for the directory and filename info, and one for the | |
86 | body ("statement program"). */ | |
87 | #define DL_PROLOG 0 | |
88 | #define DL_FILES 1 | |
89 | #define DL_BODY 2 | |
90 | ||
91 | /* First special line opcde - leave room for the standard opcodes. | |
92 | Note: If you want to change this, you'll have to update the | |
93 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
94 | out_debug_line(). */ |
95 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
96 | |
97 | #ifndef DWARF2_LINE_BASE | |
98 | /* Minimum line offset in a special line info. opcode. This value | |
99 | was chosen to give a reasonable range of values. */ | |
100 | # define DWARF2_LINE_BASE -5 | |
101 | #endif | |
102 | ||
103 | /* Range of line offsets in a special line info. opcode. */ | |
104 | #ifndef DWARF2_LINE_RANGE | |
105 | # define DWARF2_LINE_RANGE 14 | |
106 | #endif | |
107 | ||
108 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
109 | /* Define the architecture-dependent minimum instruction length (in | |
110 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 111 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
112 | #endif |
113 | ||
bd0eb99b | 114 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
115 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
116 | ||
cb30237e | 117 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
118 | #define SPECIAL_LINE(op) \ |
119 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
120 | ||
121 | /* Given a special op, return the address skip amount (in units of | |
122 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
123 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
124 | ||
cb30237e | 125 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
126 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
127 | ||
ee515fb7 | 128 | struct line_entry { |
220e750f | 129 | struct line_entry *next; |
07a53e5c | 130 | symbolS *label; |
220e750f | 131 | struct dwarf2_line_info loc; |
e6c774b4 | 132 | }; |
fac0d250 | 133 | |
ee515fb7 | 134 | struct line_subseg { |
220e750f RH |
135 | struct line_subseg *next; |
136 | subsegT subseg; | |
137 | struct line_entry *head; | |
138 | struct line_entry **ptail; | |
139 | }; | |
353e2c69 | 140 | |
ee515fb7 | 141 | struct line_seg { |
220e750f RH |
142 | struct line_seg *next; |
143 | segT seg; | |
144 | struct line_subseg *head; | |
145 | symbolS *text_start; | |
146 | symbolS *text_end; | |
147 | }; | |
148 | ||
149 | /* Collects data for all line table entries during assembly. */ | |
150 | static struct line_seg *all_segs; | |
151 | ||
ee515fb7 | 152 | struct file_entry { |
a7ed1ca2 | 153 | const char *filename; |
220e750f RH |
154 | unsigned int dir; |
155 | }; | |
156 | ||
157 | /* Table of files used by .debug_line. */ | |
158 | static struct file_entry *files; | |
159 | static unsigned int files_in_use; | |
160 | static unsigned int files_allocated; | |
161 | ||
a7ed1ca2 NC |
162 | /* Table of directories used by .debug_line. */ |
163 | static char **dirs; | |
164 | static unsigned int dirs_in_use; | |
165 | static unsigned int dirs_allocated; | |
166 | ||
b34976b6 | 167 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 168 | doing work when there's nothing to do. */ |
b34976b6 | 169 | static bfd_boolean loc_directive_seen; |
220e750f | 170 | |
07a53e5c RH |
171 | /* TRUE when we're supposed to set the basic block mark whenever a |
172 | label is seen. */ | |
173 | bfd_boolean dwarf2_loc_mark_labels; | |
174 | ||
220e750f | 175 | /* Current location as indicated by the most recent .loc directive. */ |
bd0eb99b RH |
176 | static struct dwarf2_line_info current = { |
177 | 1, 1, 0, 0, | |
178 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0 | |
179 | }; | |
220e750f | 180 | |
220e750f RH |
181 | /* The size of an address on the target. */ |
182 | static unsigned int sizeof_address; | |
183 | \f | |
a2e22468 KH |
184 | static struct line_subseg *get_line_subseg (segT, subsegT); |
185 | static unsigned int get_filenum (const char *, unsigned int); | |
186 | static struct frag *first_frag_for_seg (segT); | |
187 | static struct frag *last_frag_for_seg (segT); | |
188 | static void out_byte (int); | |
189 | static void out_opcode (int); | |
190 | static void out_two (int); | |
191 | static void out_four (int); | |
192 | static void out_abbrev (int, int); | |
193 | static void out_uleb128 (addressT); | |
c9049d30 | 194 | static offsetT get_frag_fix (fragS *, segT); |
07a53e5c | 195 | static void out_set_addr (symbolS *); |
a2e22468 KH |
196 | static int size_inc_line_addr (int, addressT); |
197 | static void emit_inc_line_addr (int, addressT, char *, int); | |
198 | static void out_inc_line_addr (int, addressT); | |
07a53e5c | 199 | static void relax_inc_line_addr (int, symbolS *, symbolS *); |
a2e22468 KH |
200 | static void process_entries (segT, struct line_entry *); |
201 | static void out_file_list (void); | |
202 | static void out_debug_line (segT); | |
203 | static void out_debug_aranges (segT, segT); | |
204 | static void out_debug_abbrev (segT); | |
220e750f | 205 | \f |
c5c0a210 | 206 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 207 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 208 | |
6174d9c8 RH |
209 | /* Create an offset to .dwarf2_*. */ |
210 | ||
211 | static void | |
a2e22468 | 212 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 RH |
213 | { |
214 | expressionS expr; | |
215 | ||
216 | expr.X_op = O_symbol; | |
217 | expr.X_add_symbol = symbol; | |
218 | expr.X_add_number = 0; | |
219 | emit_expr (&expr, size); | |
220 | } | |
c5c0a210 | 221 | #endif |
6174d9c8 | 222 | |
220e750f RH |
223 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
224 | ||
225 | static struct line_subseg * | |
a2e22468 | 226 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
227 | { |
228 | static segT last_seg; | |
229 | static subsegT last_subseg; | |
230 | static struct line_subseg *last_line_subseg; | |
231 | ||
001ae1a4 | 232 | struct line_seg **ps, *s; |
220e750f | 233 | struct line_subseg **pss, *ss; |
fac0d250 | 234 | |
220e750f RH |
235 | if (seg == last_seg && subseg == last_subseg) |
236 | return last_line_subseg; | |
237 | ||
001ae1a4 | 238 | for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next) |
220e750f RH |
239 | if (s->seg == seg) |
240 | goto found_seg; | |
241 | ||
242 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
001ae1a4 | 243 | s->next = NULL; |
220e750f RH |
244 | s->seg = seg; |
245 | s->head = NULL; | |
001ae1a4 | 246 | *ps = s; |
220e750f RH |
247 | |
248 | found_seg: | |
249 | for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) | |
fac0d250 | 250 | { |
220e750f | 251 | if (ss->subseg == subseg) |
ee515fb7 | 252 | goto found_subseg; |
220e750f RH |
253 | if (ss->subseg > subseg) |
254 | break; | |
fac0d250 | 255 | } |
220e750f RH |
256 | |
257 | ss = (struct line_subseg *) xmalloc (sizeof (*ss)); | |
258 | ss->next = *pss; | |
259 | ss->subseg = subseg; | |
260 | ss->head = NULL; | |
261 | ss->ptail = &ss->head; | |
262 | *pss = ss; | |
263 | ||
264 | found_subseg: | |
265 | last_seg = seg; | |
266 | last_subseg = subseg; | |
267 | last_line_subseg = ss; | |
268 | ||
269 | return ss; | |
fac0d250 RH |
270 | } |
271 | ||
07a53e5c RH |
272 | /* Record an entry for LOC occurring at LABEL. */ |
273 | ||
274 | static void | |
275 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) | |
276 | { | |
277 | struct line_subseg *ss; | |
278 | struct line_entry *e; | |
279 | ||
280 | e = (struct line_entry *) xmalloc (sizeof (*e)); | |
281 | e->next = NULL; | |
282 | e->label = label; | |
283 | e->loc = *loc; | |
284 | ||
285 | ss = get_line_subseg (now_seg, now_subseg); | |
286 | *ss->ptail = e; | |
287 | ss->ptail = &e->next; | |
288 | } | |
289 | ||
436d9e46 | 290 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 291 | |
220e750f | 292 | void |
a2e22468 | 293 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 294 | { |
1ea5c325 MS |
295 | static unsigned int line = -1; |
296 | static unsigned int filenum = -1; | |
220e750f | 297 | |
07a53e5c RH |
298 | symbolS *sym; |
299 | ||
220e750f RH |
300 | /* Early out for as-yet incomplete location information. */ |
301 | if (loc->filenum == 0 || loc->line == 0) | |
302 | return; | |
303 | ||
ffa554ed GK |
304 | /* Don't emit sequences of line symbols for the same line when the |
305 | symbols apply to assembler code. It is necessary to emit | |
306 | duplicate line symbols when a compiler asks for them, because GDB | |
307 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 308 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 309 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
310 | return; |
311 | ||
312 | line = loc->line; | |
313 | filenum = loc->filenum; | |
314 | ||
07a53e5c RH |
315 | sym = symbol_temp_new (now_seg, ofs, frag_now); |
316 | dwarf2_gen_line_info_1 (sym, loc); | |
220e750f | 317 | } |
fac0d250 | 318 | |
ecea7679 RH |
319 | /* Returns the current source information. If .file directives have |
320 | been encountered, the info for the corresponding source file is | |
321 | returned. Otherwise, the info for the assembly source file is | |
322 | returned. */ | |
323 | ||
220e750f | 324 | void |
a2e22468 | 325 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
326 | { |
327 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 328 | { |
220e750f RH |
329 | char *filename; |
330 | as_where (&filename, &line->line); | |
a7ed1ca2 | 331 | line->filenum = get_filenum (filename, 0); |
220e750f | 332 | line->column = 0; |
bd0eb99b | 333 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 334 | line->isa = current.isa; |
fac0d250 | 335 | } |
220e750f RH |
336 | else |
337 | *line = current; | |
fac0d250 RH |
338 | } |
339 | ||
ecea7679 RH |
340 | /* A hook to allow the target backend to inform the line number state |
341 | machine of isa changes when assembler debug info is enabled. */ | |
342 | ||
343 | void | |
344 | dwarf2_set_isa (unsigned int isa) | |
345 | { | |
346 | current.isa = isa; | |
347 | } | |
348 | ||
220e750f RH |
349 | /* Called for each machine instruction, or relatively atomic group of |
350 | machine instructions (ie built-in macro). The instruction or group | |
351 | is SIZE bytes in length. If dwarf2 line number generation is called | |
352 | for, emit a line statement appropriately. */ | |
353e2c69 | 353 | |
220e750f | 354 | void |
a2e22468 | 355 | dwarf2_emit_insn (int size) |
fac0d250 | 356 | { |
220e750f | 357 | struct dwarf2_line_info loc; |
fac0d250 | 358 | |
b6675117 | 359 | if (loc_directive_seen) |
1080e97d L |
360 | { |
361 | /* Use the last location established by a .loc directive, not | |
362 | the value returned by dwarf2_where(). That calls as_where() | |
363 | which will return either the logical input file name (foo.c) | |
364 | or the physical input file name (foo.s) and not the file name | |
365 | specified in the most recent .loc directive (eg foo.h). */ | |
366 | loc = current; | |
367 | ||
368 | /* Unless we generate DWARF2 debugging information for each | |
369 | assembler line, we only emit one line symbol for one LOC. */ | |
370 | if (debug_type != DEBUG_DWARF2) | |
b34976b6 | 371 | loc_directive_seen = FALSE; |
1080e97d | 372 | } |
b6675117 | 373 | else if (debug_type != DEBUG_DWARF2) |
220e750f | 374 | return; |
b6675117 | 375 | else |
bd0eb99b | 376 | dwarf2_where (&loc); |
b6675117 | 377 | |
220e750f | 378 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
bd0eb99b RH |
379 | |
380 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
381 | | DWARF2_FLAG_PROLOGUE_END | |
382 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
220e750f | 383 | } |
fac0d250 | 384 | |
07a53e5c RH |
385 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
386 | is enabled, emit a basic block marker. */ | |
387 | ||
388 | void | |
389 | dwarf2_emit_label (symbolS *label) | |
390 | { | |
391 | struct dwarf2_line_info loc; | |
392 | ||
393 | if (!dwarf2_loc_mark_labels) | |
394 | return; | |
395 | if (S_GET_SEGMENT (label) != now_seg) | |
396 | return; | |
397 | if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)) | |
398 | return; | |
399 | ||
400 | if (debug_type == DEBUG_DWARF2) | |
401 | dwarf2_where (&loc); | |
402 | else | |
403 | { | |
404 | loc = current; | |
405 | loc_directive_seen = FALSE; | |
406 | } | |
407 | ||
408 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
409 | ||
410 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
411 | | DWARF2_FLAG_PROLOGUE_END | |
412 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
413 | ||
414 | dwarf2_gen_line_info_1 (label, &loc); | |
415 | } | |
416 | ||
a7ed1ca2 NC |
417 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
418 | allocate it on that file table slot, otherwise return the first | |
419 | empty one. */ | |
220e750f RH |
420 | |
421 | static unsigned int | |
a2e22468 | 422 | get_filenum (const char *filename, unsigned int num) |
220e750f | 423 | { |
a7ed1ca2 NC |
424 | static unsigned int last_used, last_used_dir_len; |
425 | const char *file; | |
426 | size_t dir_len; | |
427 | unsigned int i, dir; | |
220e750f | 428 | |
a7ed1ca2 NC |
429 | if (num == 0 && last_used) |
430 | { | |
431 | if (! files[last_used].dir | |
432 | && strcmp (filename, files[last_used].filename) == 0) | |
433 | return last_used; | |
434 | if (files[last_used].dir | |
435 | && strncmp (filename, dirs[files[last_used].dir], | |
436 | last_used_dir_len) == 0 | |
437 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
438 | && strcmp (filename + last_used_dir_len + 1, | |
439 | files[last_used].filename) == 0) | |
440 | return last_used; | |
441 | } | |
220e750f | 442 | |
a7ed1ca2 NC |
443 | file = lbasename (filename); |
444 | /* Don't make empty string from / or A: from A:/ . */ | |
445 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
446 | if (file <= filename + 3) | |
447 | file = filename; | |
448 | #else | |
449 | if (file == filename + 1) | |
450 | file = filename; | |
451 | #endif | |
452 | dir_len = file - filename; | |
453 | ||
454 | dir = 0; | |
455 | if (dir_len) | |
456 | { | |
457 | --dir_len; | |
458 | for (dir = 1; dir < dirs_in_use; ++dir) | |
4dde8e61 | 459 | if (strncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
460 | && dirs[dir][dir_len] == '\0') |
461 | break; | |
462 | ||
463 | if (dir >= dirs_in_use) | |
464 | { | |
465 | if (dir >= dirs_allocated) | |
466 | { | |
467 | dirs_allocated = dir + 32; | |
468 | dirs = (char **) | |
469 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
470 | } | |
471 | ||
472 | dirs[dir] = xmalloc (dir_len + 1); | |
473 | memcpy (dirs[dir], filename, dir_len); | |
474 | dirs[dir][dir_len] = '\0'; | |
475 | dirs_in_use = dir + 1; | |
476 | } | |
477 | } | |
478 | ||
479 | if (num == 0) | |
480 | { | |
481 | for (i = 1; i < files_in_use; ++i) | |
482 | if (files[i].dir == dir | |
88b4ca40 | 483 | && files[i].filename |
a7ed1ca2 NC |
484 | && strcmp (file, files[i].filename) == 0) |
485 | { | |
486 | last_used = i; | |
487 | last_used_dir_len = dir_len; | |
488 | return i; | |
489 | } | |
490 | } | |
491 | else | |
492 | i = num; | |
220e750f RH |
493 | |
494 | if (i >= files_allocated) | |
fac0d250 | 495 | { |
249e3833 RH |
496 | unsigned int old = files_allocated; |
497 | ||
220e750f RH |
498 | files_allocated = i + 32; |
499 | files = (struct file_entry *) | |
ee515fb7 | 500 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
501 | |
502 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
503 | } |
504 | ||
a7ed1ca2 NC |
505 | files[i].filename = num ? file : xstrdup (file); |
506 | files[i].dir = dir; | |
10cd14b4 AM |
507 | if (files_in_use < i + 1) |
508 | files_in_use = i + 1; | |
220e750f | 509 | last_used = i; |
a7ed1ca2 | 510 | last_used_dir_len = dir_len; |
220e750f RH |
511 | |
512 | return i; | |
513 | } | |
fac0d250 | 514 | |
ecb4347a DJ |
515 | /* Handle two forms of .file directive: |
516 | - Pass .file "source.c" to s_app_file | |
517 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 518 | |
ecb4347a DJ |
519 | If an entry is added to the file table, return a pointer to the filename. */ |
520 | ||
521 | char * | |
a2e22468 | 522 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
523 | { |
524 | offsetT num; | |
e46d99eb | 525 | char *filename; |
220e750f RH |
526 | int filename_len; |
527 | ||
528 | /* Continue to accept a bare string and pass it off. */ | |
529 | SKIP_WHITESPACE (); | |
530 | if (*input_line_pointer == '"') | |
fac0d250 | 531 | { |
220e750f | 532 | s_app_file (0); |
ecb4347a | 533 | return NULL; |
fac0d250 RH |
534 | } |
535 | ||
220e750f RH |
536 | num = get_absolute_expression (); |
537 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
538 | if (filename == NULL) |
539 | return NULL; | |
220e750f RH |
540 | demand_empty_rest_of_line (); |
541 | ||
249e3833 | 542 | if (num < 1) |
fac0d250 | 543 | { |
0e389e77 | 544 | as_bad (_("file number less than one")); |
ecb4347a | 545 | return NULL; |
fac0d250 RH |
546 | } |
547 | ||
0e1a166b | 548 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 549 | { |
0e389e77 | 550 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 551 | return NULL; |
249e3833 | 552 | } |
220e750f | 553 | |
a7ed1ca2 | 554 | get_filenum (filename, num); |
ecb4347a DJ |
555 | |
556 | return filename; | |
fac0d250 RH |
557 | } |
558 | ||
220e750f | 559 | void |
a2e22468 | 560 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 561 | { |
ecea7679 RH |
562 | offsetT filenum, line; |
563 | ||
564 | filenum = get_absolute_expression (); | |
565 | SKIP_WHITESPACE (); | |
566 | line = get_absolute_expression (); | |
567 | ||
568 | if (filenum < 1) | |
569 | { | |
570 | as_bad (_("file number less than one")); | |
571 | return; | |
572 | } | |
573 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
574 | { | |
575 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
576 | return; | |
577 | } | |
578 | ||
579 | current.filenum = filenum; | |
580 | current.line = line; | |
581 | ||
582 | #ifndef NO_LISTING | |
583 | if (listing) | |
584 | { | |
585 | if (files[filenum].dir) | |
586 | { | |
587 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
588 | size_t file_len = strlen (files[filenum].filename); | |
589 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
590 | ||
591 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 592 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
593 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
594 | cp[dir_len + file_len + 1] = '\0'; | |
595 | listing_source_file (cp); | |
596 | } | |
597 | else | |
598 | listing_source_file (files[filenum].filename); | |
599 | listing_source_line (line); | |
600 | } | |
601 | #endif | |
602 | ||
220e750f | 603 | SKIP_WHITESPACE (); |
ecea7679 RH |
604 | if (ISDIGIT (*input_line_pointer)) |
605 | { | |
606 | current.column = get_absolute_expression (); | |
607 | SKIP_WHITESPACE (); | |
608 | } | |
609 | ||
610 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 611 | { |
bd0eb99b RH |
612 | char *p, c; |
613 | offsetT value; | |
614 | ||
615 | p = input_line_pointer; | |
616 | c = get_symbol_end (); | |
617 | ||
618 | if (strcmp (p, "basic_block") == 0) | |
619 | { | |
620 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
621 | *input_line_pointer = c; | |
622 | } | |
623 | else if (strcmp (p, "prologue_end") == 0) | |
624 | { | |
625 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
626 | *input_line_pointer = c; | |
627 | } | |
628 | else if (strcmp (p, "epilogue_begin") == 0) | |
629 | { | |
630 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
631 | *input_line_pointer = c; | |
632 | } | |
633 | else if (strcmp (p, "is_stmt") == 0) | |
634 | { | |
635 | *input_line_pointer = c; | |
636 | value = get_absolute_expression (); | |
637 | if (value == 0) | |
638 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
639 | else if (value == 1) | |
640 | current.flags |= DWARF2_FLAG_IS_STMT; | |
641 | else | |
ecea7679 RH |
642 | { |
643 | as_bad (_("is_stmt value not 0 or 1")); | |
644 | return; | |
645 | } | |
bd0eb99b RH |
646 | } |
647 | else if (strcmp (p, "isa") == 0) | |
648 | { | |
649 | *input_line_pointer = c; | |
650 | value = get_absolute_expression (); | |
ecea7679 | 651 | if (value >= 0) |
bd0eb99b | 652 | current.isa = value; |
ecea7679 RH |
653 | else |
654 | { | |
655 | as_bad (_("isa number less than zero")); | |
656 | return; | |
657 | } | |
bd0eb99b RH |
658 | } |
659 | else | |
660 | { | |
ecea7679 | 661 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
bd0eb99b | 662 | *input_line_pointer = c; |
bd0eb99b RH |
663 | return; |
664 | } | |
665 | ||
ecea7679 | 666 | SKIP_WHITESPACE (); |
bd0eb99b RH |
667 | } |
668 | ||
669 | demand_empty_rest_of_line (); | |
670 | loc_directive_seen = TRUE; | |
220e750f | 671 | } |
07a53e5c RH |
672 | |
673 | void | |
674 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
675 | { | |
676 | offsetT value = get_absolute_expression (); | |
677 | ||
678 | if (value != 0 && value != 1) | |
679 | { | |
680 | as_bad (_("expected 0 or 1")); | |
681 | ignore_rest_of_line (); | |
682 | } | |
683 | else | |
684 | { | |
685 | dwarf2_loc_mark_labels = value != 0; | |
686 | demand_empty_rest_of_line (); | |
687 | } | |
688 | } | |
220e750f RH |
689 | \f |
690 | static struct frag * | |
a2e22468 | 691 | first_frag_for_seg (segT seg) |
220e750f | 692 | { |
c9049d30 | 693 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
694 | } |
695 | ||
696 | static struct frag * | |
a2e22468 | 697 | last_frag_for_seg (segT seg) |
220e750f | 698 | { |
c9049d30 | 699 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 700 | |
c9049d30 AM |
701 | while (f->frch_next != NULL) |
702 | f = f->frch_next; | |
220e750f | 703 | |
c9049d30 | 704 | return f->frch_last; |
220e750f RH |
705 | } |
706 | \f | |
707 | /* Emit a single byte into the current segment. */ | |
708 | ||
709 | static inline void | |
a2e22468 | 710 | out_byte (int byte) |
220e750f RH |
711 | { |
712 | FRAG_APPEND_1_CHAR (byte); | |
713 | } | |
714 | ||
715 | /* Emit a statement program opcode into the current segment. */ | |
716 | ||
717 | static inline void | |
a2e22468 | 718 | out_opcode (int opc) |
220e750f RH |
719 | { |
720 | out_byte (opc); | |
721 | } | |
722 | ||
723 | /* Emit a two-byte word into the current segment. */ | |
724 | ||
725 | static inline void | |
a2e22468 | 726 | out_two (int data) |
220e750f RH |
727 | { |
728 | md_number_to_chars (frag_more (2), data, 2); | |
729 | } | |
730 | ||
731 | /* Emit a four byte word into the current segment. */ | |
732 | ||
733 | static inline void | |
a2e22468 | 734 | out_four (int data) |
220e750f RH |
735 | { |
736 | md_number_to_chars (frag_more (4), data, 4); | |
737 | } | |
738 | ||
739 | /* Emit an unsigned "little-endian base 128" number. */ | |
740 | ||
fac0d250 | 741 | static void |
a2e22468 | 742 | out_uleb128 (addressT value) |
220e750f RH |
743 | { |
744 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
745 | } | |
746 | ||
747 | /* Emit a tuple for .debug_abbrev. */ | |
748 | ||
749 | static inline void | |
a2e22468 | 750 | out_abbrev (int name, int form) |
fac0d250 | 751 | { |
220e750f RH |
752 | out_uleb128 (name); |
753 | out_uleb128 (form); | |
754 | } | |
fac0d250 | 755 | |
220e750f | 756 | /* Get the size of a fragment. */ |
fac0d250 | 757 | |
220e750f | 758 | static offsetT |
c9049d30 | 759 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
760 | { |
761 | frchainS *fr; | |
762 | ||
763 | if (frag->fr_next) | |
764 | return frag->fr_fix; | |
765 | ||
766 | /* If a fragment is the last in the chain, special measures must be | |
767 | taken to find its size before relaxation, since it may be pending | |
768 | on some subsegment chain. */ | |
c9049d30 | 769 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 770 | if (fr->frch_last == frag) |
c5c0a210 | 771 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
772 | |
773 | abort (); | |
774 | } | |
fac0d250 | 775 | |
220e750f | 776 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 777 | |
220e750f | 778 | static void |
07a53e5c | 779 | out_set_addr (symbolS *sym) |
220e750f RH |
780 | { |
781 | expressionS expr; | |
9e3af0e7 | 782 | |
fac0d250 | 783 | out_opcode (DW_LNS_extended_op); |
220e750f | 784 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
785 | |
786 | out_opcode (DW_LNE_set_address); | |
787 | expr.X_op = O_symbol; | |
788 | expr.X_add_symbol = sym; | |
789 | expr.X_add_number = 0; | |
220e750f | 790 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
791 | } |
792 | ||
a3b75434 | 793 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 794 | static void scale_addr_delta (addressT *); |
c8970b4b | 795 | |
a3b75434 | 796 | static void |
d7342424 | 797 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
798 | { |
799 | static int printed_this = 0; | |
800 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
801 | { | |
802 | if (!printed_this) | |
803 | as_bad("unaligned opcodes detected in executable segment"); | |
804 | printed_this = 1; | |
805 | } | |
806 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
807 | } | |
808 | #else | |
809 | #define scale_addr_delta(A) | |
810 | #endif | |
811 | ||
220e750f RH |
812 | /* Encode a pair of line and address skips as efficiently as possible. |
813 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 814 | |
220e750f RH |
815 | The following two routines *must* be kept in sync. This is |
816 | enforced by making emit_inc_line_addr abort if we do not emit | |
817 | exactly the expected number of bytes. */ | |
818 | ||
819 | static int | |
a2e22468 | 820 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 821 | { |
220e750f RH |
822 | unsigned int tmp, opcode; |
823 | int len = 0; | |
fac0d250 | 824 | |
220e750f | 825 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 826 | scale_addr_delta (&addr_delta); |
220e750f RH |
827 | |
828 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
829 | We cannot use special opcodes here, since we want the end_sequence | |
830 | to emit the matrix entry. */ | |
831 | if (line_delta == INT_MAX) | |
fac0d250 | 832 | { |
220e750f RH |
833 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
834 | len = 1; | |
fac0d250 | 835 | else |
220e750f RH |
836 | len = 1 + sizeof_leb128 (addr_delta, 0); |
837 | return len + 3; | |
fac0d250 | 838 | } |
fac0d250 | 839 | |
220e750f RH |
840 | /* Bias the line delta by the base. */ |
841 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 842 | |
220e750f RH |
843 | /* If the line increment is out of range of a special opcode, we |
844 | must encode it with DW_LNS_advance_line. */ | |
845 | if (tmp >= DWARF2_LINE_RANGE) | |
846 | { | |
847 | len = 1 + sizeof_leb128 (line_delta, 1); | |
848 | line_delta = 0; | |
849 | tmp = 0 - DWARF2_LINE_BASE; | |
850 | } | |
fac0d250 | 851 | |
220e750f RH |
852 | /* Bias the opcode by the special opcode base. */ |
853 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 854 | |
220e750f RH |
855 | /* Avoid overflow when addr_delta is large. */ |
856 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
857 | { | |
858 | /* Try using a special opcode. */ | |
859 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
860 | if (opcode <= 255) | |
861 | return len + 1; | |
862 | ||
863 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
864 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
865 | if (opcode <= 255) | |
866 | return len + 2; | |
867 | } | |
868 | ||
869 | /* Otherwise use DW_LNS_advance_pc. */ | |
870 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
871 | ||
872 | /* DW_LNS_copy or special opcode. */ | |
873 | len += 1; | |
874 | ||
875 | return len; | |
876 | } | |
fac0d250 | 877 | |
220e750f | 878 | static void |
a2e22468 | 879 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
880 | { |
881 | unsigned int tmp, opcode; | |
882 | int need_copy = 0; | |
883 | char *end = p + len; | |
fac0d250 | 884 | |
07a53e5c RH |
885 | /* Line number sequences cannot go backward in addresses. This means |
886 | we've incorrectly ordered the statements in the sequence. */ | |
887 | assert ((offsetT) addr_delta >= 0); | |
888 | ||
220e750f | 889 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
890 | scale_addr_delta (&addr_delta); |
891 | ||
220e750f RH |
892 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
893 | We cannot use special opcodes here, since we want the end_sequence | |
894 | to emit the matrix entry. */ | |
895 | if (line_delta == INT_MAX) | |
fac0d250 | 896 | { |
220e750f RH |
897 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
898 | *p++ = DW_LNS_const_add_pc; | |
899 | else | |
fac0d250 | 900 | { |
220e750f RH |
901 | *p++ = DW_LNS_advance_pc; |
902 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 903 | } |
220e750f RH |
904 | |
905 | *p++ = DW_LNS_extended_op; | |
906 | *p++ = 1; | |
907 | *p++ = DW_LNE_end_sequence; | |
908 | goto done; | |
fac0d250 RH |
909 | } |
910 | ||
220e750f RH |
911 | /* Bias the line delta by the base. */ |
912 | tmp = line_delta - DWARF2_LINE_BASE; | |
913 | ||
914 | /* If the line increment is out of range of a special opcode, we | |
915 | must encode it with DW_LNS_advance_line. */ | |
916 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 917 | { |
220e750f RH |
918 | *p++ = DW_LNS_advance_line; |
919 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 920 | |
220e750f RH |
921 | line_delta = 0; |
922 | tmp = 0 - DWARF2_LINE_BASE; | |
923 | need_copy = 1; | |
924 | } | |
fac0d250 | 925 | |
bd0eb99b RH |
926 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
927 | special opcode. */ | |
928 | if (line_delta == 0 && addr_delta == 0) | |
929 | { | |
930 | *p++ = DW_LNS_copy; | |
931 | goto done; | |
932 | } | |
933 | ||
220e750f RH |
934 | /* Bias the opcode by the special opcode base. */ |
935 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 936 | |
220e750f RH |
937 | /* Avoid overflow when addr_delta is large. */ |
938 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 939 | { |
220e750f RH |
940 | /* Try using a special opcode. */ |
941 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
942 | if (opcode <= 255) | |
943 | { | |
944 | *p++ = opcode; | |
945 | goto done; | |
946 | } | |
947 | ||
948 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
949 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
950 | if (opcode <= 255) | |
fac0d250 | 951 | { |
220e750f RH |
952 | *p++ = DW_LNS_const_add_pc; |
953 | *p++ = opcode; | |
954 | goto done; | |
fac0d250 RH |
955 | } |
956 | } | |
220e750f RH |
957 | |
958 | /* Otherwise use DW_LNS_advance_pc. */ | |
959 | *p++ = DW_LNS_advance_pc; | |
960 | p += output_leb128 (p, addr_delta, 0); | |
961 | ||
962 | if (need_copy) | |
963 | *p++ = DW_LNS_copy; | |
fac0d250 | 964 | else |
220e750f | 965 | *p++ = tmp; |
fac0d250 | 966 | |
220e750f RH |
967 | done: |
968 | assert (p == end); | |
969 | } | |
a8316fe2 | 970 | |
220e750f | 971 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 972 | |
220e750f | 973 | static void |
a2e22468 | 974 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
975 | { |
976 | int len = size_inc_line_addr (line_delta, addr_delta); | |
977 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
978 | } | |
9de8d8f1 | 979 | |
220e750f RH |
980 | /* Generate a variant frag that we can use to relax address/line |
981 | increments between fragments of the target segment. */ | |
9e3af0e7 | 982 | |
220e750f | 983 | static void |
07a53e5c | 984 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 985 | { |
220e750f RH |
986 | expressionS expr; |
987 | int max_chars; | |
6576f0b5 | 988 | |
220e750f RH |
989 | expr.X_op = O_subtract; |
990 | expr.X_add_symbol = to_sym; | |
991 | expr.X_op_symbol = from_sym; | |
992 | expr.X_add_number = 0; | |
fac0d250 | 993 | |
220e750f RH |
994 | /* The maximum size of the frag is the line delta with a maximum |
995 | sized address delta. */ | |
996 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 997 | |
220e750f RH |
998 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
999 | make_expr_symbol (&expr), line_delta, NULL); | |
1000 | } | |
fac0d250 | 1001 | |
220e750f RH |
1002 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1003 | based on the current values of the symbols. It is called before | |
1004 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1005 | |
220e750f | 1006 | int |
a2e22468 | 1007 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1008 | { |
1009 | offsetT addr_delta; | |
1010 | int size; | |
fac0d250 | 1011 | |
6386f3a7 | 1012 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
220e750f | 1013 | size = size_inc_line_addr (frag->fr_offset, addr_delta); |
fac0d250 | 1014 | |
220e750f | 1015 | frag->fr_subtype = size; |
fac0d250 | 1016 | |
220e750f RH |
1017 | return size; |
1018 | } | |
1019 | ||
1020 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1021 | current values of the symbols. fr_subtype is the current length | |
1022 | of the frag. This returns the change in frag length. */ | |
1023 | ||
1024 | int | |
a2e22468 | 1025 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1026 | { |
1027 | int old_size, new_size; | |
fac0d250 | 1028 | |
220e750f RH |
1029 | old_size = frag->fr_subtype; |
1030 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1031 | |
220e750f | 1032 | return new_size - old_size; |
fac0d250 RH |
1033 | } |
1034 | ||
220e750f RH |
1035 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1036 | fill frag. This is called after all relaxation has been done. | |
1037 | fr_subtype will be the desired length of the frag. */ | |
1038 | ||
1039 | void | |
a2e22468 | 1040 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1041 | { |
220e750f RH |
1042 | offsetT addr_diff; |
1043 | ||
6386f3a7 | 1044 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 1045 | |
220e750f RH |
1046 | /* fr_var carries the max_chars that we created the fragment with. |
1047 | fr_subtype carries the current expected length. We must, of | |
1048 | course, have allocated enough memory earlier. */ | |
bccba5f0 | 1049 | assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1050 | |
ee515fb7 | 1051 | emit_inc_line_addr (frag->fr_offset, addr_diff, |
220e750f RH |
1052 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); |
1053 | ||
1054 | frag->fr_fix += frag->fr_subtype; | |
1055 | frag->fr_type = rs_fill; | |
1056 | frag->fr_var = 0; | |
1057 | frag->fr_offset = 0; | |
1058 | } | |
1059 | ||
1060 | /* Generate .debug_line content for the chain of line number entries | |
1061 | beginning at E, for segment SEG. */ | |
1062 | ||
1063 | static void | |
a2e22468 | 1064 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1065 | { |
1066 | unsigned filenum = 1; | |
1067 | unsigned line = 1; | |
1068 | unsigned column = 0; | |
bd0eb99b RH |
1069 | unsigned isa = 0; |
1070 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1071 | fragS *last_frag = NULL, *frag; |
1072 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1073 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1074 | struct line_entry *next; |
1075 | ||
fead5cd9 | 1076 | do |
fac0d250 | 1077 | { |
07a53e5c | 1078 | int line_delta; |
220e750f RH |
1079 | |
1080 | if (filenum != e->loc.filenum) | |
fac0d250 | 1081 | { |
220e750f RH |
1082 | filenum = e->loc.filenum; |
1083 | out_opcode (DW_LNS_set_file); | |
1084 | out_uleb128 (filenum); | |
220e750f RH |
1085 | } |
1086 | ||
1087 | if (column != e->loc.column) | |
1088 | { | |
1089 | column = e->loc.column; | |
1090 | out_opcode (DW_LNS_set_column); | |
1091 | out_uleb128 (column); | |
220e750f RH |
1092 | } |
1093 | ||
bd0eb99b RH |
1094 | if (isa != e->loc.isa) |
1095 | { | |
1096 | isa = e->loc.isa; | |
1097 | out_opcode (DW_LNS_set_isa); | |
1098 | out_uleb128 (isa); | |
bd0eb99b RH |
1099 | } |
1100 | ||
1101 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1102 | { |
1103 | flags = e->loc.flags; | |
1104 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1105 | } |
1106 | ||
bd0eb99b | 1107 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1108 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1109 | |
bd0eb99b | 1110 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1111 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1112 | |
1113 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1114 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1115 | |
fb81275c JM |
1116 | /* Don't try to optimize away redundant entries; gdb wants two |
1117 | entries for a function where the code starts on the same line as | |
1118 | the {, and there's no way to identify that case here. Trust gcc | |
1119 | to optimize appropriately. */ | |
07a53e5c RH |
1120 | line_delta = e->loc.line - line; |
1121 | lab = e->label; | |
1122 | frag = symbol_get_frag (lab); | |
1123 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1124 | |
07a53e5c | 1125 | if (last_frag == NULL) |
220e750f | 1126 | { |
07a53e5c RH |
1127 | out_set_addr (lab); |
1128 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1129 | } |
07a53e5c RH |
1130 | else if (frag == last_frag) |
1131 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); | |
1132 | else | |
1133 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1134 | ||
1135 | line = e->loc.line; | |
1136 | last_lab = lab; | |
1137 | last_frag = frag; | |
1138 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1139 | |
1140 | next = e->next; | |
1141 | free (e); | |
1142 | e = next; | |
fac0d250 | 1143 | } |
fead5cd9 | 1144 | while (e); |
353e2c69 | 1145 | |
220e750f | 1146 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1147 | frag = last_frag_for_seg (seg); |
c9049d30 | 1148 | frag_ofs = get_frag_fix (frag, seg); |
220e750f | 1149 | if (frag == last_frag) |
07a53e5c | 1150 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1151 | else |
07a53e5c RH |
1152 | { |
1153 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1154 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1155 | } | |
fac0d250 RH |
1156 | } |
1157 | ||
220e750f RH |
1158 | /* Emit the directory and file tables for .debug_line. */ |
1159 | ||
fac0d250 | 1160 | static void |
a2e22468 | 1161 | out_file_list (void) |
fac0d250 RH |
1162 | { |
1163 | size_t size; | |
1164 | char *cp; | |
220e750f RH |
1165 | unsigned int i; |
1166 | ||
a7ed1ca2 NC |
1167 | /* Emit directory list. */ |
1168 | for (i = 1; i < dirs_in_use; ++i) | |
1169 | { | |
1170 | size = strlen (dirs[i]) + 1; | |
1171 | cp = frag_more (size); | |
1172 | memcpy (cp, dirs[i], size); | |
1173 | } | |
1174 | /* Terminate it. */ | |
220e750f | 1175 | out_byte ('\0'); |
fac0d250 | 1176 | |
220e750f | 1177 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1178 | { |
249e3833 RH |
1179 | if (files[i].filename == NULL) |
1180 | { | |
0e389e77 | 1181 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1182 | /* Prevent a crash later, particularly for file 1. */ |
1183 | files[i].filename = ""; | |
249e3833 RH |
1184 | continue; |
1185 | } | |
1186 | ||
220e750f | 1187 | size = strlen (files[i].filename) + 1; |
fac0d250 | 1188 | cp = frag_more (size); |
220e750f | 1189 | memcpy (cp, files[i].filename, size); |
fac0d250 | 1190 | |
220e750f | 1191 | out_uleb128 (files[i].dir); /* directory number */ |
fac0d250 RH |
1192 | out_uleb128 (0); /* last modification timestamp */ |
1193 | out_uleb128 (0); /* filesize */ | |
1194 | } | |
353e2c69 KH |
1195 | |
1196 | /* Terminate filename list. */ | |
1197 | out_byte (0); | |
fac0d250 RH |
1198 | } |
1199 | ||
220e750f RH |
1200 | /* Emit the collected .debug_line data. */ |
1201 | ||
1202 | static void | |
a2e22468 | 1203 | out_debug_line (segT line_seg) |
220e750f RH |
1204 | { |
1205 | expressionS expr; | |
1206 | symbolS *line_start; | |
1207 | symbolS *prologue_end; | |
1208 | symbolS *line_end; | |
1209 | struct line_seg *s; | |
14e777e0 KB |
1210 | enum dwarf2_format d2f; |
1211 | int sizeof_offset; | |
220e750f RH |
1212 | |
1213 | subseg_set (line_seg, 0); | |
1214 | ||
b7d6ed97 RH |
1215 | line_start = symbol_temp_new_now (); |
1216 | prologue_end = symbol_temp_make (); | |
1217 | line_end = symbol_temp_make (); | |
220e750f RH |
1218 | |
1219 | /* Total length of the information for this compilation unit. */ | |
1220 | expr.X_op = O_subtract; | |
1221 | expr.X_add_symbol = line_end; | |
1222 | expr.X_op_symbol = line_start; | |
14e777e0 KB |
1223 | |
1224 | d2f = DWARF2_FORMAT (); | |
1225 | if (d2f == dwarf2_format_32bit) | |
1226 | { | |
1227 | expr.X_add_number = -4; | |
1228 | emit_expr (&expr, 4); | |
1229 | sizeof_offset = 4; | |
1230 | } | |
1231 | else if (d2f == dwarf2_format_64bit) | |
1232 | { | |
1233 | expr.X_add_number = -12; | |
1234 | out_four (-1); | |
1235 | emit_expr (&expr, 8); | |
1236 | sizeof_offset = 8; | |
1237 | } | |
1238 | else if (d2f == dwarf2_format_64bit_irix) | |
1239 | { | |
1240 | expr.X_add_number = -8; | |
1241 | emit_expr (&expr, 8); | |
1242 | sizeof_offset = 8; | |
1243 | } | |
1244 | else | |
1245 | { | |
1246 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1247 | } | |
220e750f RH |
1248 | |
1249 | /* Version. */ | |
1250 | out_two (2); | |
1251 | ||
1252 | /* Length of the prologue following this length. */ | |
1253 | expr.X_op = O_subtract; | |
1254 | expr.X_add_symbol = prologue_end; | |
1255 | expr.X_op_symbol = line_start; | |
1256 | expr.X_add_number = - (4 + 2 + 4); | |
14e777e0 | 1257 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1258 | |
1259 | /* Parameters of the state machine. */ | |
1260 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1261 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1262 | out_byte (DWARF2_LINE_BASE); | |
1263 | out_byte (DWARF2_LINE_RANGE); | |
1264 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1265 | ||
1266 | /* Standard opcode lengths. */ | |
1267 | out_byte (0); /* DW_LNS_copy */ | |
1268 | out_byte (1); /* DW_LNS_advance_pc */ | |
1269 | out_byte (1); /* DW_LNS_advance_line */ | |
1270 | out_byte (1); /* DW_LNS_set_file */ | |
1271 | out_byte (1); /* DW_LNS_set_column */ | |
1272 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1273 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1274 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1275 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1276 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1277 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1278 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1279 | |
1280 | out_file_list (); | |
1281 | ||
b7d6ed97 | 1282 | symbol_set_value_now (prologue_end); |
220e750f RH |
1283 | |
1284 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1285 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1286 | process_entries (s->seg, s->head->head); |
1287 | ||
b7d6ed97 | 1288 | symbol_set_value_now (line_end); |
220e750f RH |
1289 | } |
1290 | ||
802f5d9e NC |
1291 | static void |
1292 | out_debug_ranges (segT ranges_seg) | |
1293 | { | |
1294 | unsigned int addr_size = sizeof_address; | |
1295 | struct line_seg *s; | |
1296 | expressionS expr; | |
1297 | unsigned int i; | |
1298 | ||
1299 | subseg_set (ranges_seg, 0); | |
1300 | ||
1301 | /* Base Address Entry. */ | |
1302 | for (i = 0; i < addr_size; i++) | |
1303 | out_byte (0xff); | |
1304 | for (i = 0; i < addr_size; i++) | |
1305 | out_byte (0); | |
1306 | ||
1307 | /* Range List Entry. */ | |
1308 | for (s = all_segs; s; s = s->next) | |
1309 | { | |
1310 | fragS *frag; | |
1311 | symbolS *beg, *end; | |
1312 | ||
1313 | frag = first_frag_for_seg (s->seg); | |
1314 | beg = symbol_temp_new (s->seg, 0, frag); | |
1315 | s->text_start = beg; | |
1316 | ||
1317 | frag = last_frag_for_seg (s->seg); | |
1318 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
1319 | s->text_end = end; | |
1320 | ||
1321 | expr.X_op = O_symbol; | |
1322 | expr.X_add_symbol = beg; | |
1323 | expr.X_add_number = 0; | |
1324 | emit_expr (&expr, addr_size); | |
1325 | ||
1326 | expr.X_op = O_symbol; | |
1327 | expr.X_add_symbol = end; | |
1328 | expr.X_add_number = 0; | |
1329 | emit_expr (&expr, addr_size); | |
1330 | } | |
1331 | ||
1332 | /* End of Range Entry. */ | |
1333 | for (i = 0; i < addr_size; i++) | |
1334 | out_byte (0); | |
1335 | for (i = 0; i < addr_size; i++) | |
1336 | out_byte (0); | |
1337 | } | |
1338 | ||
220e750f RH |
1339 | /* Emit data for .debug_aranges. */ |
1340 | ||
58b5739a | 1341 | static void |
a2e22468 | 1342 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1343 | { |
220e750f RH |
1344 | unsigned int addr_size = sizeof_address; |
1345 | addressT size, skip; | |
1346 | struct line_seg *s; | |
1347 | expressionS expr; | |
1348 | char *p; | |
fac0d250 | 1349 | |
220e750f | 1350 | size = 4 + 2 + 4 + 1 + 1; |
fac0d250 | 1351 | |
ee515fb7 KH |
1352 | skip = 2 * addr_size - (size & (2 * addr_size - 1)); |
1353 | if (skip == 2 * addr_size) | |
220e750f RH |
1354 | skip = 0; |
1355 | size += skip; | |
fac0d250 | 1356 | |
ee515fb7 KH |
1357 | for (s = all_segs; s; s = s->next) |
1358 | size += 2 * addr_size; | |
fac0d250 | 1359 | |
ee515fb7 | 1360 | size += 2 * addr_size; |
fac0d250 | 1361 | |
220e750f | 1362 | subseg_set (aranges_seg, 0); |
fac0d250 | 1363 | |
220e750f RH |
1364 | /* Length of the compilation unit. */ |
1365 | out_four (size - 4); | |
fac0d250 | 1366 | |
220e750f RH |
1367 | /* Version. */ |
1368 | out_two (2); | |
4dc7ead9 | 1369 | |
220e750f | 1370 | /* Offset to .debug_info. */ |
6174d9c8 RH |
1371 | /* ??? sizeof_offset */ |
1372 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4); | |
220e750f RH |
1373 | |
1374 | /* Size of an address (offset portion). */ | |
1375 | out_byte (addr_size); | |
1376 | ||
1377 | /* Size of a segment descriptor. */ | |
1378 | out_byte (0); | |
1379 | ||
1380 | /* Align the header. */ | |
1381 | if (skip) | |
ee515fb7 | 1382 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1383 | |
ee515fb7 | 1384 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1385 | { |
1386 | fragS *frag; | |
1387 | symbolS *beg, *end; | |
1388 | ||
1389 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1390 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1391 | s->text_start = beg; |
1392 | ||
1393 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 1394 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
1395 | s->text_end = end; |
1396 | ||
1397 | expr.X_op = O_symbol; | |
1398 | expr.X_add_symbol = beg; | |
1399 | expr.X_add_number = 0; | |
1400 | emit_expr (&expr, addr_size); | |
1401 | ||
1402 | expr.X_op = O_subtract; | |
1403 | expr.X_add_symbol = end; | |
1404 | expr.X_op_symbol = beg; | |
1405 | expr.X_add_number = 0; | |
1406 | emit_expr (&expr, addr_size); | |
1407 | } | |
4dc7ead9 | 1408 | |
220e750f RH |
1409 | p = frag_more (2 * addr_size); |
1410 | md_number_to_chars (p, 0, addr_size); | |
1411 | md_number_to_chars (p + addr_size, 0, addr_size); | |
4dc7ead9 RH |
1412 | } |
1413 | ||
220e750f RH |
1414 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1415 | sync with out_debug_info below. */ | |
fac0d250 | 1416 | |
220e750f | 1417 | static void |
a2e22468 | 1418 | out_debug_abbrev (segT abbrev_seg) |
220e750f RH |
1419 | { |
1420 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1421 | |
220e750f RH |
1422 | out_uleb128 (1); |
1423 | out_uleb128 (DW_TAG_compile_unit); | |
1424 | out_byte (DW_CHILDREN_no); | |
1425 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1426 | if (all_segs->next == NULL) | |
4dc7ead9 | 1427 | { |
220e750f RH |
1428 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1429 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1430 | } | |
802f5d9e NC |
1431 | else |
1432 | { | |
1433 | if (DWARF2_FORMAT () == dwarf2_format_32bit) | |
1434 | out_abbrev (DW_AT_ranges, DW_FORM_data4); | |
1435 | else | |
1436 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
1437 | } | |
48b91938 | 1438 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1439 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1440 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1441 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1442 | out_abbrev (0, 0); | |
a987bfc9 RH |
1443 | |
1444 | /* Terminate the abbreviations for this compilation unit. */ | |
1445 | out_byte (0); | |
220e750f | 1446 | } |
4dc7ead9 | 1447 | |
220e750f | 1448 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1449 | |
220e750f | 1450 | static void |
802f5d9e | 1451 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) |
220e750f RH |
1452 | { |
1453 | char producer[128]; | |
1454 | char *comp_dir; | |
1455 | expressionS expr; | |
1456 | symbolS *info_start; | |
1457 | symbolS *info_end; | |
1458 | char *p; | |
1459 | int len; | |
14e777e0 KB |
1460 | enum dwarf2_format d2f; |
1461 | int sizeof_offset; | |
4dc7ead9 | 1462 | |
220e750f | 1463 | subseg_set (info_seg, 0); |
4dc7ead9 | 1464 | |
b7d6ed97 RH |
1465 | info_start = symbol_temp_new_now (); |
1466 | info_end = symbol_temp_make (); | |
4dc7ead9 | 1467 | |
220e750f RH |
1468 | /* Compilation Unit length. */ |
1469 | expr.X_op = O_subtract; | |
1470 | expr.X_add_symbol = info_end; | |
1471 | expr.X_op_symbol = info_start; | |
14e777e0 KB |
1472 | |
1473 | d2f = DWARF2_FORMAT (); | |
1474 | if (d2f == dwarf2_format_32bit) | |
1475 | { | |
1476 | expr.X_add_number = -4; | |
1477 | emit_expr (&expr, 4); | |
1478 | sizeof_offset = 4; | |
1479 | } | |
1480 | else if (d2f == dwarf2_format_64bit) | |
1481 | { | |
1482 | expr.X_add_number = -12; | |
1483 | out_four (-1); | |
1484 | emit_expr (&expr, 8); | |
1485 | sizeof_offset = 8; | |
1486 | } | |
1487 | else if (d2f == dwarf2_format_64bit_irix) | |
1488 | { | |
1489 | expr.X_add_number = -8; | |
1490 | emit_expr (&expr, 8); | |
1491 | sizeof_offset = 8; | |
1492 | } | |
1493 | else | |
1494 | { | |
1495 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1496 | } | |
4dc7ead9 | 1497 | |
220e750f RH |
1498 | /* DWARF version. */ |
1499 | out_two (2); | |
4dc7ead9 | 1500 | |
220e750f | 1501 | /* .debug_abbrev offset */ |
6174d9c8 | 1502 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1503 | |
220e750f RH |
1504 | /* Target address size. */ |
1505 | out_byte (sizeof_address); | |
fac0d250 | 1506 | |
220e750f RH |
1507 | /* DW_TAG_compile_unit DIE abbrev */ |
1508 | out_uleb128 (1); | |
fac0d250 | 1509 | |
220e750f | 1510 | /* DW_AT_stmt_list */ |
6174d9c8 RH |
1511 | /* ??? sizeof_offset */ |
1512 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4); | |
fac0d250 | 1513 | |
802f5d9e | 1514 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 1515 | if (all_segs->next == NULL) |
58b5739a | 1516 | { |
220e750f RH |
1517 | /* DW_AT_low_pc */ |
1518 | expr.X_op = O_symbol; | |
1519 | expr.X_add_symbol = all_segs->text_start; | |
1520 | expr.X_add_number = 0; | |
1521 | emit_expr (&expr, sizeof_address); | |
1522 | ||
1523 | /* DW_AT_high_pc */ | |
1524 | expr.X_op = O_symbol; | |
1525 | expr.X_add_symbol = all_segs->text_end; | |
1526 | expr.X_add_number = 0; | |
1527 | emit_expr (&expr, sizeof_address); | |
58b5739a | 1528 | } |
802f5d9e NC |
1529 | else |
1530 | { | |
1531 | /* This attributes is emitted if the code is disjoint. */ | |
1532 | ||
1533 | /* DW_AT_ranges */ | |
1534 | expr.X_op = O_symbol; | |
1535 | expr.X_add_symbol = section_symbol (ranges_seg); | |
1536 | expr.X_add_number = 0; | |
1537 | emit_expr (&expr, sizeof_address); | |
1538 | } | |
58b5739a | 1539 | |
48b91938 RH |
1540 | /* DW_AT_name. We don't have the actual file name that was present |
1541 | on the command line, so assume files[1] is the main input file. | |
1542 | We're not supposed to get called unless at least one line number | |
1543 | entry was emitted, so this should always be defined. */ | |
1544 | if (!files || files_in_use < 1) | |
1545 | abort (); | |
a7ed1ca2 NC |
1546 | if (files[1].dir) |
1547 | { | |
1548 | len = strlen (dirs[files[1].dir]); | |
1549 | p = frag_more (len + 1); | |
1550 | memcpy (p, dirs[files[1].dir], len); | |
56487c55 | 1551 | INSERT_DIR_SEPARATOR (p, len); |
a7ed1ca2 | 1552 | } |
48b91938 RH |
1553 | len = strlen (files[1].filename) + 1; |
1554 | p = frag_more (len); | |
1555 | memcpy (p, files[1].filename, len); | |
1556 | ||
220e750f RH |
1557 | /* DW_AT_comp_dir */ |
1558 | comp_dir = getpwd (); | |
1559 | len = strlen (comp_dir) + 1; | |
1560 | p = frag_more (len); | |
1561 | memcpy (p, comp_dir, len); | |
fac0d250 | 1562 | |
220e750f RH |
1563 | /* DW_AT_producer */ |
1564 | sprintf (producer, "GNU AS %s", VERSION); | |
1565 | len = strlen (producer) + 1; | |
1566 | p = frag_more (len); | |
1567 | memcpy (p, producer, len); | |
fac0d250 | 1568 | |
220e750f RH |
1569 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1570 | dwarf2 draft has no standard code for assembler. */ | |
1571 | out_two (DW_LANG_Mips_Assembler); | |
1572 | ||
b7d6ed97 | 1573 | symbol_set_value_now (info_end); |
fac0d250 RH |
1574 | } |
1575 | ||
c6cb92c5 NS |
1576 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1577 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
1578 | file has a non-empty .debug_info section. If we emit .debug_line, | |
1579 | and the .debug_info section is empty, we also emit .debug_info, | |
1580 | .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if | |
1581 | there were any .file/.loc directives, or --gdwarf2 was given and | |
1582 | there were any located instructions emitted. */ | |
1583 | ||
fac0d250 | 1584 | void |
a2e22468 | 1585 | dwarf2_finish (void) |
fac0d250 | 1586 | { |
220e750f RH |
1587 | segT line_seg; |
1588 | struct line_seg *s; | |
c6cb92c5 NS |
1589 | segT info_seg; |
1590 | int emit_other_sections = 0; | |
1591 | ||
1592 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1593 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1594 | |
c6cb92c5 NS |
1595 | if (!all_segs && emit_other_sections) |
1596 | /* There is no line information and no non-empty .debug_info | |
1597 | section. */ | |
220e750f | 1598 | return; |
fac0d250 | 1599 | |
220e750f | 1600 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1601 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1602 | |
220e750f RH |
1603 | /* Create and switch to the line number section. */ |
1604 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1605 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1606 | |
220e750f | 1607 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1608 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1609 | { |
220e750f RH |
1610 | struct line_subseg *ss = s->head; |
1611 | struct line_entry **ptail = ss->ptail; | |
1612 | ||
1613 | while ((ss = ss->next) != NULL) | |
1614 | { | |
1615 | *ptail = ss->head; | |
1616 | ptail = ss->ptail; | |
1617 | } | |
fac0d250 | 1618 | } |
85a39694 | 1619 | |
220e750f | 1620 | out_debug_line (line_seg); |
85a39694 | 1621 | |
c6cb92c5 NS |
1622 | /* If this is assembler generated line info, and there is no |
1623 | debug_info already, we need .debug_info and .debug_abbrev | |
1624 | sections as well. */ | |
1625 | if (emit_other_sections) | |
220e750f RH |
1626 | { |
1627 | segT abbrev_seg; | |
220e750f | 1628 | segT aranges_seg; |
802f5d9e | 1629 | segT ranges_seg; |
4dc7ead9 | 1630 | |
c6cb92c5 NS |
1631 | assert (all_segs); |
1632 | ||
220e750f RH |
1633 | info_seg = subseg_new (".debug_info", 0); |
1634 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1635 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1636 | |
8a7140c3 NC |
1637 | bfd_set_section_flags (stdoutput, info_seg, |
1638 | SEC_READONLY | SEC_DEBUGGING); | |
1639 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1640 | SEC_READONLY | SEC_DEBUGGING); | |
1641 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1642 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1643 | |
ee515fb7 | 1644 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1645 | |
802f5d9e NC |
1646 | if (all_segs->next == NULL) |
1647 | ranges_seg = NULL; | |
1648 | else | |
1649 | { | |
1650 | ranges_seg = subseg_new (".debug_ranges", 0); | |
1651 | bfd_set_section_flags (stdoutput, ranges_seg, | |
1652 | SEC_READONLY | SEC_DEBUGGING); | |
1653 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
1654 | out_debug_ranges (ranges_seg); | |
1655 | } | |
1656 | ||
220e750f RH |
1657 | out_debug_aranges (aranges_seg, info_seg); |
1658 | out_debug_abbrev (abbrev_seg); | |
802f5d9e | 1659 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg); |
220e750f | 1660 | } |
85a39694 | 1661 | } |