Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
aa820537 | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
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 | ||
fc0eebac TG |
92 | #ifndef DWARF2_VERSION |
93 | #define DWARF2_VERSION 2 | |
94 | #endif | |
95 | ||
fac0d250 RH |
96 | #include "subsegs.h" |
97 | ||
fa8f86ff | 98 | #include "dwarf2.h" |
fac0d250 | 99 | |
fac0d250 RH |
100 | /* Since we can't generate the prolog until the body is complete, we |
101 | use three different subsegments for .debug_line: one holding the | |
102 | prolog, one for the directory and filename info, and one for the | |
103 | body ("statement program"). */ | |
104 | #define DL_PROLOG 0 | |
105 | #define DL_FILES 1 | |
106 | #define DL_BODY 2 | |
107 | ||
1737851b BW |
108 | /* If linker relaxation might change offsets in the code, the DWARF special |
109 | opcodes and variable-length operands cannot be used. If this macro is | |
110 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
111 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
112 | # define DWARF2_USE_FIXED_ADVANCE_PC 0 | |
113 | #endif | |
114 | ||
fac0d250 RH |
115 | /* First special line opcde - leave room for the standard opcodes. |
116 | Note: If you want to change this, you'll have to update the | |
117 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
118 | out_debug_line(). */ |
119 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
120 | |
121 | #ifndef DWARF2_LINE_BASE | |
122 | /* Minimum line offset in a special line info. opcode. This value | |
123 | was chosen to give a reasonable range of values. */ | |
124 | # define DWARF2_LINE_BASE -5 | |
125 | #endif | |
126 | ||
127 | /* Range of line offsets in a special line info. opcode. */ | |
128 | #ifndef DWARF2_LINE_RANGE | |
129 | # define DWARF2_LINE_RANGE 14 | |
130 | #endif | |
131 | ||
132 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
133 | /* Define the architecture-dependent minimum instruction length (in | |
134 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 135 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
136 | #endif |
137 | ||
bd0eb99b | 138 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
139 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
140 | ||
cb30237e | 141 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
142 | #define SPECIAL_LINE(op) \ |
143 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
144 | ||
145 | /* Given a special op, return the address skip amount (in units of | |
146 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
147 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
148 | ||
cb30237e | 149 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
150 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
151 | ||
ee515fb7 | 152 | struct line_entry { |
220e750f | 153 | struct line_entry *next; |
07a53e5c | 154 | symbolS *label; |
220e750f | 155 | struct dwarf2_line_info loc; |
e6c774b4 | 156 | }; |
fac0d250 | 157 | |
ee515fb7 | 158 | struct line_subseg { |
220e750f RH |
159 | struct line_subseg *next; |
160 | subsegT subseg; | |
161 | struct line_entry *head; | |
162 | struct line_entry **ptail; | |
163 | }; | |
353e2c69 | 164 | |
ee515fb7 | 165 | struct line_seg { |
220e750f RH |
166 | struct line_seg *next; |
167 | segT seg; | |
168 | struct line_subseg *head; | |
169 | symbolS *text_start; | |
170 | symbolS *text_end; | |
171 | }; | |
172 | ||
173 | /* Collects data for all line table entries during assembly. */ | |
174 | static struct line_seg *all_segs; | |
1e9cc1c2 NC |
175 | /* Hash used to quickly lookup a segment by name, avoiding the need to search |
176 | through the all_segs list. */ | |
177 | static struct hash_control *all_segs_hash; | |
178 | static struct line_seg **last_seg_ptr; | |
220e750f | 179 | |
ee515fb7 | 180 | struct file_entry { |
a7ed1ca2 | 181 | const char *filename; |
220e750f RH |
182 | unsigned int dir; |
183 | }; | |
184 | ||
185 | /* Table of files used by .debug_line. */ | |
186 | static struct file_entry *files; | |
187 | static unsigned int files_in_use; | |
188 | static unsigned int files_allocated; | |
189 | ||
a7ed1ca2 NC |
190 | /* Table of directories used by .debug_line. */ |
191 | static char **dirs; | |
192 | static unsigned int dirs_in_use; | |
193 | static unsigned int dirs_allocated; | |
194 | ||
b34976b6 | 195 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 196 | doing work when there's nothing to do. */ |
1eee4adc | 197 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 198 | |
07a53e5c RH |
199 | /* TRUE when we're supposed to set the basic block mark whenever a |
200 | label is seen. */ | |
201 | bfd_boolean dwarf2_loc_mark_labels; | |
202 | ||
220e750f | 203 | /* Current location as indicated by the most recent .loc directive. */ |
bd0eb99b RH |
204 | static struct dwarf2_line_info current = { |
205 | 1, 1, 0, 0, | |
92846e72 CC |
206 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
207 | 0 | |
bd0eb99b | 208 | }; |
220e750f | 209 | |
5045d766 RS |
210 | /* Lines that are at the same location as CURRENT, and which are waiting |
211 | for a label. */ | |
212 | static struct line_entry *pending_lines, **pending_lines_tail = &pending_lines; | |
213 | ||
220e750f RH |
214 | /* The size of an address on the target. */ |
215 | static unsigned int sizeof_address; | |
216 | \f | |
a2e22468 | 217 | static unsigned int get_filenum (const char *, unsigned int); |
413a266c | 218 | |
c5c0a210 | 219 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 220 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 221 | |
6174d9c8 RH |
222 | /* Create an offset to .dwarf2_*. */ |
223 | ||
224 | static void | |
a2e22468 | 225 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 226 | { |
91d6fa6a | 227 | expressionS exp; |
6174d9c8 | 228 | |
91d6fa6a NC |
229 | exp.X_op = O_symbol; |
230 | exp.X_add_symbol = symbol; | |
231 | exp.X_add_number = 0; | |
232 | emit_expr (&exp, size); | |
6174d9c8 | 233 | } |
c5c0a210 | 234 | #endif |
6174d9c8 | 235 | |
220e750f RH |
236 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
237 | ||
238 | static struct line_subseg * | |
a2e22468 | 239 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
240 | { |
241 | static segT last_seg; | |
242 | static subsegT last_subseg; | |
243 | static struct line_subseg *last_line_subseg; | |
244 | ||
1e9cc1c2 | 245 | struct line_seg *s; |
91d6fa6a | 246 | struct line_subseg **pss, *lss; |
fac0d250 | 247 | |
220e750f RH |
248 | if (seg == last_seg && subseg == last_subseg) |
249 | return last_line_subseg; | |
250 | ||
1e9cc1c2 NC |
251 | s = (struct line_seg *) hash_find (all_segs_hash, seg->name); |
252 | if (s == NULL) | |
253 | { | |
254 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
255 | s->next = NULL; | |
256 | s->seg = seg; | |
257 | s->head = NULL; | |
258 | *last_seg_ptr = s; | |
259 | last_seg_ptr = &s->next; | |
260 | hash_insert (all_segs_hash, seg->name, s); | |
261 | } | |
262 | gas_assert (seg == s->seg); | |
220e750f | 263 | |
91d6fa6a | 264 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 265 | { |
91d6fa6a | 266 | if (lss->subseg == subseg) |
ee515fb7 | 267 | goto found_subseg; |
91d6fa6a | 268 | if (lss->subseg > subseg) |
220e750f | 269 | break; |
fac0d250 | 270 | } |
220e750f | 271 | |
91d6fa6a NC |
272 | lss = (struct line_subseg *) xmalloc (sizeof (*lss)); |
273 | lss->next = *pss; | |
274 | lss->subseg = subseg; | |
275 | lss->head = NULL; | |
276 | lss->ptail = &lss->head; | |
277 | *pss = lss; | |
220e750f RH |
278 | |
279 | found_subseg: | |
280 | last_seg = seg; | |
281 | last_subseg = subseg; | |
91d6fa6a | 282 | last_line_subseg = lss; |
220e750f | 283 | |
91d6fa6a | 284 | return lss; |
fac0d250 RH |
285 | } |
286 | ||
5045d766 | 287 | /* Push LOC onto the pending lines list. */ |
07a53e5c RH |
288 | |
289 | static void | |
5045d766 | 290 | dwarf2_push_line (struct dwarf2_line_info *loc) |
07a53e5c | 291 | { |
07a53e5c RH |
292 | struct line_entry *e; |
293 | ||
294 | e = (struct line_entry *) xmalloc (sizeof (*e)); | |
295 | e->next = NULL; | |
5045d766 | 296 | e->label = NULL; |
07a53e5c RH |
297 | e->loc = *loc; |
298 | ||
5045d766 RS |
299 | *pending_lines_tail = e; |
300 | pending_lines_tail = &(*pending_lines_tail)->next; | |
301 | } | |
302 | ||
303 | /* Emit all pending line information. LABEL is the label with which the | |
304 | lines should be associated, or null if they should be associated with | |
305 | the current position. */ | |
306 | ||
307 | static void | |
308 | dwarf2_flush_pending_lines (symbolS *label) | |
309 | { | |
310 | if (pending_lines) | |
311 | { | |
312 | struct line_subseg *lss; | |
313 | struct line_entry *e; | |
314 | ||
315 | if (!label) | |
48b07401 | 316 | label = symbol_temp_new_now (); |
5045d766 RS |
317 | |
318 | for (e = pending_lines; e; e = e->next) | |
319 | e->label = label; | |
320 | ||
321 | lss = get_line_subseg (now_seg, now_subseg); | |
322 | *lss->ptail = pending_lines; | |
323 | lss->ptail = pending_lines_tail; | |
324 | ||
325 | pending_lines = NULL; | |
326 | pending_lines_tail = &pending_lines; | |
327 | } | |
07a53e5c RH |
328 | } |
329 | ||
436d9e46 | 330 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 331 | |
220e750f | 332 | void |
a2e22468 | 333 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 334 | { |
1ea5c325 MS |
335 | static unsigned int line = -1; |
336 | static unsigned int filenum = -1; | |
220e750f RH |
337 | |
338 | /* Early out for as-yet incomplete location information. */ | |
339 | if (loc->filenum == 0 || loc->line == 0) | |
340 | return; | |
341 | ||
ffa554ed GK |
342 | /* Don't emit sequences of line symbols for the same line when the |
343 | symbols apply to assembler code. It is necessary to emit | |
344 | duplicate line symbols when a compiler asks for them, because GDB | |
345 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 346 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 347 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
348 | return; |
349 | ||
350 | line = loc->line; | |
351 | filenum = loc->filenum; | |
352 | ||
5045d766 RS |
353 | dwarf2_push_line (loc); |
354 | dwarf2_flush_pending_lines (symbol_temp_new (now_seg, ofs, frag_now)); | |
220e750f | 355 | } |
fac0d250 | 356 | |
ecea7679 RH |
357 | /* Returns the current source information. If .file directives have |
358 | been encountered, the info for the corresponding source file is | |
359 | returned. Otherwise, the info for the assembly source file is | |
360 | returned. */ | |
361 | ||
220e750f | 362 | void |
a2e22468 | 363 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
364 | { |
365 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 366 | { |
220e750f RH |
367 | char *filename; |
368 | as_where (&filename, &line->line); | |
a7ed1ca2 | 369 | line->filenum = get_filenum (filename, 0); |
220e750f | 370 | line->column = 0; |
bd0eb99b | 371 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 372 | line->isa = current.isa; |
92846e72 | 373 | line->discriminator = current.discriminator; |
fac0d250 | 374 | } |
220e750f RH |
375 | else |
376 | *line = current; | |
fac0d250 RH |
377 | } |
378 | ||
7fd3924a | 379 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
380 | machine of isa changes when assembler debug info is enabled. */ |
381 | ||
382 | void | |
383 | dwarf2_set_isa (unsigned int isa) | |
384 | { | |
385 | current.isa = isa; | |
386 | } | |
387 | ||
220e750f RH |
388 | /* Called for each machine instruction, or relatively atomic group of |
389 | machine instructions (ie built-in macro). The instruction or group | |
390 | is SIZE bytes in length. If dwarf2 line number generation is called | |
391 | for, emit a line statement appropriately. */ | |
353e2c69 | 392 | |
220e750f | 393 | void |
a2e22468 | 394 | dwarf2_emit_insn (int size) |
fac0d250 | 395 | { |
220e750f | 396 | struct dwarf2_line_info loc; |
fac0d250 | 397 | |
7fd3924a | 398 | if (!dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2) |
220e750f | 399 | return; |
7fd3924a AM |
400 | |
401 | dwarf2_where (&loc); | |
b6675117 | 402 | |
220e750f | 403 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
661ba50f BW |
404 | dwarf2_consume_line_info (); |
405 | } | |
406 | ||
407 | /* Called after the current line information has been either used with | |
408 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
409 | This resets the state of the line number information to reflect that | |
410 | it has been used. */ | |
411 | ||
412 | void | |
413 | dwarf2_consume_line_info (void) | |
414 | { | |
5045d766 RS |
415 | /* If the consumer has stashed the current location away for later use, |
416 | assume that any earlier location information should be associated | |
417 | with ".". */ | |
418 | dwarf2_flush_pending_lines (NULL); | |
419 | ||
661ba50f BW |
420 | /* Unless we generate DWARF2 debugging information for each |
421 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 422 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
423 | |
424 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
425 | | DWARF2_FLAG_PROLOGUE_END | |
426 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 427 | current.discriminator = 0; |
220e750f | 428 | } |
fac0d250 | 429 | |
07a53e5c RH |
430 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
431 | is enabled, emit a basic block marker. */ | |
432 | ||
433 | void | |
434 | dwarf2_emit_label (symbolS *label) | |
435 | { | |
436 | struct dwarf2_line_info loc; | |
437 | ||
438 | if (!dwarf2_loc_mark_labels) | |
439 | return; | |
440 | if (S_GET_SEGMENT (label) != now_seg) | |
441 | return; | |
442 | if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)) | |
443 | return; | |
7fd3924a AM |
444 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
445 | return; | |
446 | ||
447 | dwarf2_where (&loc); | |
07a53e5c RH |
448 | |
449 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
450 | ||
5045d766 RS |
451 | dwarf2_push_line (&loc); |
452 | dwarf2_flush_pending_lines (label); | |
7fd3924a | 453 | dwarf2_consume_line_info (); |
07a53e5c RH |
454 | } |
455 | ||
a7ed1ca2 NC |
456 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
457 | allocate it on that file table slot, otherwise return the first | |
458 | empty one. */ | |
220e750f RH |
459 | |
460 | static unsigned int | |
a2e22468 | 461 | get_filenum (const char *filename, unsigned int num) |
220e750f | 462 | { |
a7ed1ca2 NC |
463 | static unsigned int last_used, last_used_dir_len; |
464 | const char *file; | |
465 | size_t dir_len; | |
466 | unsigned int i, dir; | |
220e750f | 467 | |
a7ed1ca2 NC |
468 | if (num == 0 && last_used) |
469 | { | |
470 | if (! files[last_used].dir | |
8b6efd89 | 471 | && filename_cmp (filename, files[last_used].filename) == 0) |
a7ed1ca2 NC |
472 | return last_used; |
473 | if (files[last_used].dir | |
8b6efd89 KT |
474 | && filename_ncmp (filename, dirs[files[last_used].dir], |
475 | last_used_dir_len) == 0 | |
a7ed1ca2 | 476 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) |
8b6efd89 KT |
477 | && filename_cmp (filename + last_used_dir_len + 1, |
478 | files[last_used].filename) == 0) | |
a7ed1ca2 NC |
479 | return last_used; |
480 | } | |
220e750f | 481 | |
a7ed1ca2 NC |
482 | file = lbasename (filename); |
483 | /* Don't make empty string from / or A: from A:/ . */ | |
484 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
485 | if (file <= filename + 3) | |
486 | file = filename; | |
487 | #else | |
488 | if (file == filename + 1) | |
489 | file = filename; | |
490 | #endif | |
491 | dir_len = file - filename; | |
492 | ||
493 | dir = 0; | |
494 | if (dir_len) | |
495 | { | |
01e1a5bc | 496 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR |
a7ed1ca2 | 497 | --dir_len; |
01e1a5bc | 498 | #endif |
a7ed1ca2 | 499 | for (dir = 1; dir < dirs_in_use; ++dir) |
8b6efd89 | 500 | if (filename_ncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
501 | && dirs[dir][dir_len] == '\0') |
502 | break; | |
503 | ||
504 | if (dir >= dirs_in_use) | |
505 | { | |
506 | if (dir >= dirs_allocated) | |
507 | { | |
508 | dirs_allocated = dir + 32; | |
509 | dirs = (char **) | |
510 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
511 | } | |
512 | ||
1e9cc1c2 | 513 | dirs[dir] = (char *) xmalloc (dir_len + 1); |
a7ed1ca2 NC |
514 | memcpy (dirs[dir], filename, dir_len); |
515 | dirs[dir][dir_len] = '\0'; | |
516 | dirs_in_use = dir + 1; | |
517 | } | |
518 | } | |
519 | ||
520 | if (num == 0) | |
521 | { | |
522 | for (i = 1; i < files_in_use; ++i) | |
523 | if (files[i].dir == dir | |
88b4ca40 | 524 | && files[i].filename |
8b6efd89 | 525 | && filename_cmp (file, files[i].filename) == 0) |
a7ed1ca2 NC |
526 | { |
527 | last_used = i; | |
528 | last_used_dir_len = dir_len; | |
529 | return i; | |
530 | } | |
531 | } | |
532 | else | |
533 | i = num; | |
220e750f RH |
534 | |
535 | if (i >= files_allocated) | |
fac0d250 | 536 | { |
249e3833 RH |
537 | unsigned int old = files_allocated; |
538 | ||
220e750f RH |
539 | files_allocated = i + 32; |
540 | files = (struct file_entry *) | |
ee515fb7 | 541 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
542 | |
543 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
544 | } |
545 | ||
a7ed1ca2 NC |
546 | files[i].filename = num ? file : xstrdup (file); |
547 | files[i].dir = dir; | |
10cd14b4 AM |
548 | if (files_in_use < i + 1) |
549 | files_in_use = i + 1; | |
220e750f | 550 | last_used = i; |
a7ed1ca2 | 551 | last_used_dir_len = dir_len; |
220e750f RH |
552 | |
553 | return i; | |
554 | } | |
fac0d250 | 555 | |
ecb4347a DJ |
556 | /* Handle two forms of .file directive: |
557 | - Pass .file "source.c" to s_app_file | |
558 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 559 | |
ecb4347a DJ |
560 | If an entry is added to the file table, return a pointer to the filename. */ |
561 | ||
562 | char * | |
a2e22468 | 563 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
564 | { |
565 | offsetT num; | |
e46d99eb | 566 | char *filename; |
220e750f RH |
567 | int filename_len; |
568 | ||
569 | /* Continue to accept a bare string and pass it off. */ | |
570 | SKIP_WHITESPACE (); | |
571 | if (*input_line_pointer == '"') | |
fac0d250 | 572 | { |
220e750f | 573 | s_app_file (0); |
ecb4347a | 574 | return NULL; |
fac0d250 RH |
575 | } |
576 | ||
220e750f RH |
577 | num = get_absolute_expression (); |
578 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
579 | if (filename == NULL) |
580 | return NULL; | |
220e750f RH |
581 | demand_empty_rest_of_line (); |
582 | ||
249e3833 | 583 | if (num < 1) |
fac0d250 | 584 | { |
0e389e77 | 585 | as_bad (_("file number less than one")); |
ecb4347a | 586 | return NULL; |
fac0d250 RH |
587 | } |
588 | ||
7cadeb2c AM |
589 | /* A .file directive implies compiler generated debug information is |
590 | being supplied. Turn off gas generated debug info. */ | |
591 | debug_type = DEBUG_NONE; | |
592 | ||
0e1a166b | 593 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 594 | { |
0e389e77 | 595 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 596 | return NULL; |
249e3833 | 597 | } |
220e750f | 598 | |
a7ed1ca2 | 599 | get_filenum (filename, num); |
ecb4347a DJ |
600 | |
601 | return filename; | |
fac0d250 RH |
602 | } |
603 | ||
220e750f | 604 | void |
a2e22468 | 605 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 606 | { |
ecea7679 RH |
607 | offsetT filenum, line; |
608 | ||
851feff8 DJ |
609 | /* If we see two .loc directives in a row, force the first one to be |
610 | output now. */ | |
7cadeb2c | 611 | if (dwarf2_loc_directive_seen) |
5045d766 | 612 | dwarf2_push_line (¤t); |
851feff8 | 613 | |
ecea7679 RH |
614 | filenum = get_absolute_expression (); |
615 | SKIP_WHITESPACE (); | |
616 | line = get_absolute_expression (); | |
617 | ||
618 | if (filenum < 1) | |
619 | { | |
620 | as_bad (_("file number less than one")); | |
621 | return; | |
622 | } | |
623 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
624 | { | |
625 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
626 | return; | |
627 | } | |
628 | ||
629 | current.filenum = filenum; | |
630 | current.line = line; | |
92846e72 | 631 | current.discriminator = 0; |
ecea7679 RH |
632 | |
633 | #ifndef NO_LISTING | |
634 | if (listing) | |
635 | { | |
636 | if (files[filenum].dir) | |
637 | { | |
638 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
639 | size_t file_len = strlen (files[filenum].filename); | |
640 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
641 | ||
642 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 643 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
644 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
645 | cp[dir_len + file_len + 1] = '\0'; | |
646 | listing_source_file (cp); | |
647 | } | |
648 | else | |
649 | listing_source_file (files[filenum].filename); | |
650 | listing_source_line (line); | |
651 | } | |
652 | #endif | |
653 | ||
220e750f | 654 | SKIP_WHITESPACE (); |
ecea7679 RH |
655 | if (ISDIGIT (*input_line_pointer)) |
656 | { | |
657 | current.column = get_absolute_expression (); | |
658 | SKIP_WHITESPACE (); | |
659 | } | |
660 | ||
661 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 662 | { |
bd0eb99b RH |
663 | char *p, c; |
664 | offsetT value; | |
665 | ||
666 | p = input_line_pointer; | |
667 | c = get_symbol_end (); | |
668 | ||
669 | if (strcmp (p, "basic_block") == 0) | |
670 | { | |
671 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
672 | *input_line_pointer = c; | |
673 | } | |
674 | else if (strcmp (p, "prologue_end") == 0) | |
675 | { | |
676 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
677 | *input_line_pointer = c; | |
678 | } | |
679 | else if (strcmp (p, "epilogue_begin") == 0) | |
680 | { | |
681 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
682 | *input_line_pointer = c; | |
683 | } | |
684 | else if (strcmp (p, "is_stmt") == 0) | |
685 | { | |
686 | *input_line_pointer = c; | |
687 | value = get_absolute_expression (); | |
688 | if (value == 0) | |
689 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
690 | else if (value == 1) | |
691 | current.flags |= DWARF2_FLAG_IS_STMT; | |
692 | else | |
ecea7679 RH |
693 | { |
694 | as_bad (_("is_stmt value not 0 or 1")); | |
695 | return; | |
696 | } | |
bd0eb99b RH |
697 | } |
698 | else if (strcmp (p, "isa") == 0) | |
699 | { | |
7fd3924a | 700 | *input_line_pointer = c; |
bd0eb99b | 701 | value = get_absolute_expression (); |
ecea7679 | 702 | if (value >= 0) |
bd0eb99b | 703 | current.isa = value; |
ecea7679 RH |
704 | else |
705 | { | |
706 | as_bad (_("isa number less than zero")); | |
707 | return; | |
708 | } | |
bd0eb99b | 709 | } |
92846e72 CC |
710 | else if (strcmp (p, "discriminator") == 0) |
711 | { | |
712 | *input_line_pointer = c; | |
713 | value = get_absolute_expression (); | |
714 | if (value >= 0) | |
715 | current.discriminator = value; | |
716 | else | |
717 | { | |
718 | as_bad (_("discriminator less than zero")); | |
719 | return; | |
720 | } | |
721 | } | |
bd0eb99b RH |
722 | else |
723 | { | |
ecea7679 | 724 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
7fd3924a | 725 | *input_line_pointer = c; |
bd0eb99b RH |
726 | return; |
727 | } | |
728 | ||
ecea7679 | 729 | SKIP_WHITESPACE (); |
bd0eb99b RH |
730 | } |
731 | ||
732 | demand_empty_rest_of_line (); | |
1eee4adc | 733 | dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 734 | debug_type = DEBUG_NONE; |
220e750f | 735 | } |
07a53e5c RH |
736 | |
737 | void | |
738 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
739 | { | |
740 | offsetT value = get_absolute_expression (); | |
741 | ||
742 | if (value != 0 && value != 1) | |
743 | { | |
744 | as_bad (_("expected 0 or 1")); | |
745 | ignore_rest_of_line (); | |
746 | } | |
747 | else | |
748 | { | |
749 | dwarf2_loc_mark_labels = value != 0; | |
750 | demand_empty_rest_of_line (); | |
751 | } | |
752 | } | |
220e750f RH |
753 | \f |
754 | static struct frag * | |
a2e22468 | 755 | first_frag_for_seg (segT seg) |
220e750f | 756 | { |
c9049d30 | 757 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
758 | } |
759 | ||
760 | static struct frag * | |
a2e22468 | 761 | last_frag_for_seg (segT seg) |
220e750f | 762 | { |
c9049d30 | 763 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 764 | |
c9049d30 AM |
765 | while (f->frch_next != NULL) |
766 | f = f->frch_next; | |
220e750f | 767 | |
c9049d30 | 768 | return f->frch_last; |
220e750f RH |
769 | } |
770 | \f | |
771 | /* Emit a single byte into the current segment. */ | |
772 | ||
773 | static inline void | |
a2e22468 | 774 | out_byte (int byte) |
220e750f RH |
775 | { |
776 | FRAG_APPEND_1_CHAR (byte); | |
777 | } | |
778 | ||
779 | /* Emit a statement program opcode into the current segment. */ | |
780 | ||
781 | static inline void | |
a2e22468 | 782 | out_opcode (int opc) |
220e750f RH |
783 | { |
784 | out_byte (opc); | |
785 | } | |
786 | ||
787 | /* Emit a two-byte word into the current segment. */ | |
788 | ||
789 | static inline void | |
a2e22468 | 790 | out_two (int data) |
220e750f RH |
791 | { |
792 | md_number_to_chars (frag_more (2), data, 2); | |
793 | } | |
794 | ||
795 | /* Emit a four byte word into the current segment. */ | |
796 | ||
797 | static inline void | |
a2e22468 | 798 | out_four (int data) |
220e750f RH |
799 | { |
800 | md_number_to_chars (frag_more (4), data, 4); | |
801 | } | |
802 | ||
803 | /* Emit an unsigned "little-endian base 128" number. */ | |
804 | ||
fac0d250 | 805 | static void |
a2e22468 | 806 | out_uleb128 (addressT value) |
220e750f RH |
807 | { |
808 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
809 | } | |
810 | ||
92846e72 CC |
811 | /* Emit a signed "little-endian base 128" number. */ |
812 | ||
813 | static void | |
814 | out_leb128 (addressT value) | |
815 | { | |
816 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
817 | } | |
818 | ||
220e750f RH |
819 | /* Emit a tuple for .debug_abbrev. */ |
820 | ||
821 | static inline void | |
a2e22468 | 822 | out_abbrev (int name, int form) |
fac0d250 | 823 | { |
220e750f RH |
824 | out_uleb128 (name); |
825 | out_uleb128 (form); | |
826 | } | |
fac0d250 | 827 | |
220e750f | 828 | /* Get the size of a fragment. */ |
fac0d250 | 829 | |
220e750f | 830 | static offsetT |
c9049d30 | 831 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
832 | { |
833 | frchainS *fr; | |
834 | ||
835 | if (frag->fr_next) | |
836 | return frag->fr_fix; | |
837 | ||
838 | /* If a fragment is the last in the chain, special measures must be | |
839 | taken to find its size before relaxation, since it may be pending | |
840 | on some subsegment chain. */ | |
c9049d30 | 841 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 842 | if (fr->frch_last == frag) |
c5c0a210 | 843 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
844 | |
845 | abort (); | |
846 | } | |
fac0d250 | 847 | |
220e750f | 848 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 849 | |
220e750f | 850 | static void |
07a53e5c | 851 | out_set_addr (symbolS *sym) |
220e750f | 852 | { |
91d6fa6a | 853 | expressionS exp; |
9e3af0e7 | 854 | |
fac0d250 | 855 | out_opcode (DW_LNS_extended_op); |
220e750f | 856 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
857 | |
858 | out_opcode (DW_LNE_set_address); | |
91d6fa6a NC |
859 | exp.X_op = O_symbol; |
860 | exp.X_add_symbol = sym; | |
861 | exp.X_add_number = 0; | |
862 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
863 | } |
864 | ||
a3b75434 | 865 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 866 | static void scale_addr_delta (addressT *); |
c8970b4b | 867 | |
a3b75434 | 868 | static void |
d7342424 | 869 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
870 | { |
871 | static int printed_this = 0; | |
872 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
873 | { | |
874 | if (!printed_this) | |
875 | as_bad("unaligned opcodes detected in executable segment"); | |
876 | printed_this = 1; | |
877 | } | |
878 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
879 | } | |
880 | #else | |
881 | #define scale_addr_delta(A) | |
882 | #endif | |
883 | ||
220e750f RH |
884 | /* Encode a pair of line and address skips as efficiently as possible. |
885 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 886 | |
220e750f RH |
887 | The following two routines *must* be kept in sync. This is |
888 | enforced by making emit_inc_line_addr abort if we do not emit | |
889 | exactly the expected number of bytes. */ | |
890 | ||
891 | static int | |
a2e22468 | 892 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 893 | { |
220e750f RH |
894 | unsigned int tmp, opcode; |
895 | int len = 0; | |
fac0d250 | 896 | |
220e750f | 897 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 898 | scale_addr_delta (&addr_delta); |
220e750f RH |
899 | |
900 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
901 | We cannot use special opcodes here, since we want the end_sequence | |
902 | to emit the matrix entry. */ | |
903 | if (line_delta == INT_MAX) | |
fac0d250 | 904 | { |
220e750f RH |
905 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
906 | len = 1; | |
fac0d250 | 907 | else |
220e750f RH |
908 | len = 1 + sizeof_leb128 (addr_delta, 0); |
909 | return len + 3; | |
fac0d250 | 910 | } |
fac0d250 | 911 | |
220e750f RH |
912 | /* Bias the line delta by the base. */ |
913 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 914 | |
220e750f RH |
915 | /* If the line increment is out of range of a special opcode, we |
916 | must encode it with DW_LNS_advance_line. */ | |
917 | if (tmp >= DWARF2_LINE_RANGE) | |
918 | { | |
919 | len = 1 + sizeof_leb128 (line_delta, 1); | |
920 | line_delta = 0; | |
921 | tmp = 0 - DWARF2_LINE_BASE; | |
922 | } | |
fac0d250 | 923 | |
220e750f RH |
924 | /* Bias the opcode by the special opcode base. */ |
925 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 926 | |
220e750f RH |
927 | /* Avoid overflow when addr_delta is large. */ |
928 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
929 | { | |
930 | /* Try using a special opcode. */ | |
931 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
932 | if (opcode <= 255) | |
933 | return len + 1; | |
934 | ||
935 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
936 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
937 | if (opcode <= 255) | |
938 | return len + 2; | |
939 | } | |
940 | ||
941 | /* Otherwise use DW_LNS_advance_pc. */ | |
942 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
943 | ||
944 | /* DW_LNS_copy or special opcode. */ | |
945 | len += 1; | |
946 | ||
947 | return len; | |
948 | } | |
fac0d250 | 949 | |
220e750f | 950 | static void |
a2e22468 | 951 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
952 | { |
953 | unsigned int tmp, opcode; | |
954 | int need_copy = 0; | |
955 | char *end = p + len; | |
fac0d250 | 956 | |
07a53e5c RH |
957 | /* Line number sequences cannot go backward in addresses. This means |
958 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 959 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 960 | |
220e750f | 961 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
962 | scale_addr_delta (&addr_delta); |
963 | ||
220e750f RH |
964 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
965 | We cannot use special opcodes here, since we want the end_sequence | |
966 | to emit the matrix entry. */ | |
967 | if (line_delta == INT_MAX) | |
fac0d250 | 968 | { |
220e750f RH |
969 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
970 | *p++ = DW_LNS_const_add_pc; | |
971 | else | |
fac0d250 | 972 | { |
220e750f RH |
973 | *p++ = DW_LNS_advance_pc; |
974 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 975 | } |
220e750f RH |
976 | |
977 | *p++ = DW_LNS_extended_op; | |
978 | *p++ = 1; | |
979 | *p++ = DW_LNE_end_sequence; | |
980 | goto done; | |
fac0d250 RH |
981 | } |
982 | ||
220e750f RH |
983 | /* Bias the line delta by the base. */ |
984 | tmp = line_delta - DWARF2_LINE_BASE; | |
985 | ||
986 | /* If the line increment is out of range of a special opcode, we | |
987 | must encode it with DW_LNS_advance_line. */ | |
988 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 989 | { |
220e750f RH |
990 | *p++ = DW_LNS_advance_line; |
991 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 992 | |
220e750f RH |
993 | line_delta = 0; |
994 | tmp = 0 - DWARF2_LINE_BASE; | |
995 | need_copy = 1; | |
996 | } | |
fac0d250 | 997 | |
bd0eb99b RH |
998 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
999 | special opcode. */ | |
1000 | if (line_delta == 0 && addr_delta == 0) | |
1001 | { | |
1002 | *p++ = DW_LNS_copy; | |
1003 | goto done; | |
1004 | } | |
1005 | ||
220e750f RH |
1006 | /* Bias the opcode by the special opcode base. */ |
1007 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1008 | |
220e750f RH |
1009 | /* Avoid overflow when addr_delta is large. */ |
1010 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 1011 | { |
220e750f RH |
1012 | /* Try using a special opcode. */ |
1013 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1014 | if (opcode <= 255) | |
1015 | { | |
1016 | *p++ = opcode; | |
1017 | goto done; | |
1018 | } | |
1019 | ||
1020 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1021 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1022 | if (opcode <= 255) | |
fac0d250 | 1023 | { |
220e750f RH |
1024 | *p++ = DW_LNS_const_add_pc; |
1025 | *p++ = opcode; | |
1026 | goto done; | |
fac0d250 RH |
1027 | } |
1028 | } | |
220e750f RH |
1029 | |
1030 | /* Otherwise use DW_LNS_advance_pc. */ | |
1031 | *p++ = DW_LNS_advance_pc; | |
1032 | p += output_leb128 (p, addr_delta, 0); | |
1033 | ||
1034 | if (need_copy) | |
1035 | *p++ = DW_LNS_copy; | |
fac0d250 | 1036 | else |
220e750f | 1037 | *p++ = tmp; |
fac0d250 | 1038 | |
220e750f | 1039 | done: |
9c2799c2 | 1040 | gas_assert (p == end); |
220e750f | 1041 | } |
a8316fe2 | 1042 | |
220e750f | 1043 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1044 | |
220e750f | 1045 | static void |
a2e22468 | 1046 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1047 | { |
1048 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1049 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1050 | } | |
9de8d8f1 | 1051 | |
1737851b BW |
1052 | /* Write out an alternative form of line and address skips using |
1053 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1054 | line and address information, but it is required if linker relaxation |
1055 | could change the code offsets. The following two routines *must* be | |
1056 | kept in sync. */ | |
1737851b | 1057 | |
7ddd14de BW |
1058 | static int |
1059 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1060 | { |
7ddd14de | 1061 | int len = 0; |
1737851b BW |
1062 | |
1063 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1064 | if (line_delta != INT_MAX) |
1065 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1066 | ||
1067 | if (addr_delta > 50000) | |
1068 | { | |
1069 | /* DW_LNS_extended_op */ | |
1070 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1071 | /* DW_LNE_set_address */ | |
1072 | len += 1 + sizeof_address; | |
1073 | } | |
1074 | else | |
1075 | /* DW_LNS_fixed_advance_pc */ | |
1076 | len += 3; | |
1077 | ||
1737851b | 1078 | if (line_delta == INT_MAX) |
7ddd14de BW |
1079 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1080 | len += 3; | |
1081 | else | |
1082 | /* DW_LNS_copy */ | |
1083 | len += 1; | |
1084 | ||
1085 | return len; | |
1086 | } | |
1087 | ||
1088 | static void | |
1089 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1090 | char *p, int len) | |
1091 | { | |
91d6fa6a | 1092 | expressionS *pexp; |
7ddd14de BW |
1093 | segT line_seg; |
1094 | char *end = p + len; | |
1095 | ||
1096 | /* Line number sequences cannot go backward in addresses. This means | |
1097 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1098 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de BW |
1099 | |
1100 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
1101 | if (line_delta != INT_MAX) | |
1102 | { | |
1103 | *p++ = DW_LNS_advance_line; | |
1104 | p += output_leb128 (p, line_delta, 1); | |
1105 | } | |
1106 | ||
91d6fa6a | 1107 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1108 | line_seg = subseg_get (".debug_line", 0); |
1109 | ||
1110 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1111 | advance the address by at most 64K. Linker relaxation (without | |
1112 | which this function would not be used) could change the operand by | |
1113 | an unknown amount. If the address increment is getting close to | |
1114 | the limit, just reset the address. */ | |
1115 | if (addr_delta > 50000) | |
1737851b | 1116 | { |
7ddd14de | 1117 | symbolS *to_sym; |
91d6fa6a | 1118 | expressionS exp; |
7ddd14de | 1119 | |
9f6db0d3 | 1120 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1121 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1122 | |
1123 | *p++ = DW_LNS_extended_op; | |
1124 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1125 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1126 | exp.X_op = O_symbol; |
1127 | exp.X_add_symbol = to_sym; | |
1128 | exp.X_add_number = 0; | |
7ddd14de | 1129 | subseg_change (line_seg, 0); |
91d6fa6a | 1130 | emit_expr_fix (&exp, sizeof_address, frag, p); |
7ddd14de BW |
1131 | p += sizeof_address; |
1132 | } | |
1133 | else | |
1134 | { | |
1135 | *p++ = DW_LNS_fixed_advance_pc; | |
1136 | subseg_change (line_seg, 0); | |
91d6fa6a | 1137 | emit_expr_fix (pexp, 2, frag, p); |
7ddd14de | 1138 | p += 2; |
1737851b BW |
1139 | } |
1140 | ||
7ddd14de BW |
1141 | if (line_delta == INT_MAX) |
1142 | { | |
1143 | *p++ = DW_LNS_extended_op; | |
1144 | *p++ = 1; | |
1145 | *p++ = DW_LNE_end_sequence; | |
1146 | } | |
1147 | else | |
1148 | *p++ = DW_LNS_copy; | |
1737851b | 1149 | |
9c2799c2 | 1150 | gas_assert (p == end); |
1737851b BW |
1151 | } |
1152 | ||
220e750f RH |
1153 | /* Generate a variant frag that we can use to relax address/line |
1154 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1155 | |
220e750f | 1156 | static void |
07a53e5c | 1157 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1158 | { |
91d6fa6a | 1159 | expressionS exp; |
220e750f | 1160 | int max_chars; |
6576f0b5 | 1161 | |
91d6fa6a NC |
1162 | exp.X_op = O_subtract; |
1163 | exp.X_add_symbol = to_sym; | |
1164 | exp.X_op_symbol = from_sym; | |
1165 | exp.X_add_number = 0; | |
fac0d250 | 1166 | |
220e750f RH |
1167 | /* The maximum size of the frag is the line delta with a maximum |
1168 | sized address delta. */ | |
7ddd14de BW |
1169 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1170 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1171 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1172 | else | |
1173 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1174 | |
220e750f | 1175 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1176 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1177 | } |
fac0d250 | 1178 | |
220e750f RH |
1179 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1180 | based on the current values of the symbols. It is called before | |
1181 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1182 | |
220e750f | 1183 | int |
a2e22468 | 1184 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1185 | { |
1186 | offsetT addr_delta; | |
1187 | int size; | |
fac0d250 | 1188 | |
6386f3a7 | 1189 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1190 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1191 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1192 | else | |
1193 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1194 | |
220e750f | 1195 | frag->fr_subtype = size; |
fac0d250 | 1196 | |
220e750f RH |
1197 | return size; |
1198 | } | |
1199 | ||
1200 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1201 | current values of the symbols. fr_subtype is the current length | |
1202 | of the frag. This returns the change in frag length. */ | |
1203 | ||
1204 | int | |
a2e22468 | 1205 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1206 | { |
1207 | int old_size, new_size; | |
fac0d250 | 1208 | |
220e750f RH |
1209 | old_size = frag->fr_subtype; |
1210 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1211 | |
220e750f | 1212 | return new_size - old_size; |
fac0d250 RH |
1213 | } |
1214 | ||
220e750f RH |
1215 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1216 | fill frag. This is called after all relaxation has been done. | |
1217 | fr_subtype will be the desired length of the frag. */ | |
1218 | ||
1219 | void | |
a2e22468 | 1220 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1221 | { |
220e750f RH |
1222 | offsetT addr_diff; |
1223 | ||
6386f3a7 | 1224 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 1225 | |
220e750f RH |
1226 | /* fr_var carries the max_chars that we created the fragment with. |
1227 | fr_subtype carries the current expected length. We must, of | |
1228 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1229 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1230 | |
7ddd14de BW |
1231 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1232 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1233 | frag->fr_literal + frag->fr_fix, | |
1234 | frag->fr_subtype); | |
1235 | else | |
1236 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1237 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1238 | |
1239 | frag->fr_fix += frag->fr_subtype; | |
1240 | frag->fr_type = rs_fill; | |
1241 | frag->fr_var = 0; | |
1242 | frag->fr_offset = 0; | |
1243 | } | |
1244 | ||
1245 | /* Generate .debug_line content for the chain of line number entries | |
1246 | beginning at E, for segment SEG. */ | |
1247 | ||
1248 | static void | |
a2e22468 | 1249 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1250 | { |
1251 | unsigned filenum = 1; | |
1252 | unsigned line = 1; | |
1253 | unsigned column = 0; | |
bd0eb99b RH |
1254 | unsigned isa = 0; |
1255 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1256 | fragS *last_frag = NULL, *frag; |
1257 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1258 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1259 | struct line_entry *next; |
1260 | ||
fead5cd9 | 1261 | do |
fac0d250 | 1262 | { |
07a53e5c | 1263 | int line_delta; |
220e750f RH |
1264 | |
1265 | if (filenum != e->loc.filenum) | |
fac0d250 | 1266 | { |
220e750f RH |
1267 | filenum = e->loc.filenum; |
1268 | out_opcode (DW_LNS_set_file); | |
1269 | out_uleb128 (filenum); | |
220e750f RH |
1270 | } |
1271 | ||
1272 | if (column != e->loc.column) | |
1273 | { | |
1274 | column = e->loc.column; | |
1275 | out_opcode (DW_LNS_set_column); | |
1276 | out_uleb128 (column); | |
220e750f RH |
1277 | } |
1278 | ||
92846e72 CC |
1279 | if (e->loc.discriminator != 0) |
1280 | { | |
1281 | out_opcode (DW_LNS_extended_op); | |
1282 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1283 | out_opcode (DW_LNE_set_discriminator); | |
1284 | out_uleb128 (e->loc.discriminator); | |
1285 | } | |
1286 | ||
bd0eb99b RH |
1287 | if (isa != e->loc.isa) |
1288 | { | |
1289 | isa = e->loc.isa; | |
1290 | out_opcode (DW_LNS_set_isa); | |
1291 | out_uleb128 (isa); | |
bd0eb99b RH |
1292 | } |
1293 | ||
1294 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1295 | { |
1296 | flags = e->loc.flags; | |
1297 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1298 | } |
1299 | ||
bd0eb99b | 1300 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1301 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1302 | |
bd0eb99b | 1303 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1304 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1305 | |
1306 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1307 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1308 | |
fb81275c JM |
1309 | /* Don't try to optimize away redundant entries; gdb wants two |
1310 | entries for a function where the code starts on the same line as | |
1311 | the {, and there's no way to identify that case here. Trust gcc | |
1312 | to optimize appropriately. */ | |
07a53e5c RH |
1313 | line_delta = e->loc.line - line; |
1314 | lab = e->label; | |
1315 | frag = symbol_get_frag (lab); | |
1316 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1317 | |
07a53e5c | 1318 | if (last_frag == NULL) |
220e750f | 1319 | { |
07a53e5c RH |
1320 | out_set_addr (lab); |
1321 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1322 | } |
7ddd14de | 1323 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1324 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1325 | else | |
1326 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1327 | ||
1328 | line = e->loc.line; | |
1329 | last_lab = lab; | |
1330 | last_frag = frag; | |
1331 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1332 | |
1333 | next = e->next; | |
1334 | free (e); | |
1335 | e = next; | |
fac0d250 | 1336 | } |
fead5cd9 | 1337 | while (e); |
353e2c69 | 1338 | |
220e750f | 1339 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1340 | frag = last_frag_for_seg (seg); |
c9049d30 | 1341 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1342 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1343 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1344 | else |
07a53e5c RH |
1345 | { |
1346 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1347 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1348 | } | |
fac0d250 RH |
1349 | } |
1350 | ||
220e750f RH |
1351 | /* Emit the directory and file tables for .debug_line. */ |
1352 | ||
fac0d250 | 1353 | static void |
a2e22468 | 1354 | out_file_list (void) |
fac0d250 RH |
1355 | { |
1356 | size_t size; | |
3d6b762c | 1357 | const char *dir; |
fac0d250 | 1358 | char *cp; |
220e750f RH |
1359 | unsigned int i; |
1360 | ||
a7ed1ca2 NC |
1361 | /* Emit directory list. */ |
1362 | for (i = 1; i < dirs_in_use; ++i) | |
1363 | { | |
3d6b762c JM |
1364 | dir = remap_debug_filename (dirs[i]); |
1365 | size = strlen (dir) + 1; | |
a7ed1ca2 | 1366 | cp = frag_more (size); |
3d6b762c | 1367 | memcpy (cp, dir, size); |
a7ed1ca2 NC |
1368 | } |
1369 | /* Terminate it. */ | |
220e750f | 1370 | out_byte ('\0'); |
fac0d250 | 1371 | |
220e750f | 1372 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1373 | { |
01e1a5bc NC |
1374 | const char *fullfilename; |
1375 | ||
249e3833 RH |
1376 | if (files[i].filename == NULL) |
1377 | { | |
0e389e77 | 1378 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1379 | /* Prevent a crash later, particularly for file 1. */ |
1380 | files[i].filename = ""; | |
249e3833 RH |
1381 | continue; |
1382 | } | |
1383 | ||
01e1a5bc NC |
1384 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
1385 | files[i].dir ? dirs [files [i].dir] : ""); | |
1386 | size = strlen (fullfilename) + 1; | |
fac0d250 | 1387 | cp = frag_more (size); |
01e1a5bc | 1388 | memcpy (cp, fullfilename, size); |
fac0d250 | 1389 | |
220e750f | 1390 | out_uleb128 (files[i].dir); /* directory number */ |
01e1a5bc NC |
1391 | /* Output the last modification timestamp. */ |
1392 | out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename, | |
1393 | files[i].dir ? dirs [files [i].dir] : "")); | |
1394 | /* Output the filesize. */ | |
1395 | out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename, | |
1396 | files[i].dir ? dirs [files [i].dir] : "")); | |
fac0d250 | 1397 | } |
353e2c69 KH |
1398 | |
1399 | /* Terminate filename list. */ | |
1400 | out_byte (0); | |
fac0d250 RH |
1401 | } |
1402 | ||
413a266c AM |
1403 | /* Switch to SEC and output a header length field. Return the size of |
1404 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
1405 | to the end of the section. */ | |
1406 | ||
1407 | static int | |
91d6fa6a | 1408 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
1409 | { |
1410 | symbolS *start_sym; | |
1411 | symbolS *end_sym; | |
1412 | ||
1413 | subseg_set (sec, 0); | |
1414 | start_sym = symbol_temp_new_now ();; | |
1415 | end_sym = symbol_temp_make (); | |
1416 | ||
1417 | /* Total length of the information. */ | |
91d6fa6a NC |
1418 | exp->X_op = O_subtract; |
1419 | exp->X_add_symbol = end_sym; | |
1420 | exp->X_op_symbol = start_sym; | |
413a266c AM |
1421 | |
1422 | switch (DWARF2_FORMAT (sec)) | |
1423 | { | |
1424 | case dwarf2_format_32bit: | |
91d6fa6a NC |
1425 | exp->X_add_number = -4; |
1426 | emit_expr (exp, 4); | |
413a266c AM |
1427 | return 4; |
1428 | ||
1429 | case dwarf2_format_64bit: | |
91d6fa6a | 1430 | exp->X_add_number = -12; |
413a266c | 1431 | out_four (-1); |
91d6fa6a | 1432 | emit_expr (exp, 8); |
413a266c AM |
1433 | return 8; |
1434 | ||
1435 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
1436 | exp->X_add_number = -8; |
1437 | emit_expr (exp, 8); | |
413a266c AM |
1438 | return 8; |
1439 | } | |
1440 | ||
1441 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1442 | return 0; | |
1443 | } | |
1444 | ||
220e750f RH |
1445 | /* Emit the collected .debug_line data. */ |
1446 | ||
1447 | static void | |
a2e22468 | 1448 | out_debug_line (segT line_seg) |
220e750f | 1449 | { |
91d6fa6a | 1450 | expressionS exp; |
220e750f RH |
1451 | symbolS *prologue_end; |
1452 | symbolS *line_end; | |
1453 | struct line_seg *s; | |
14e777e0 | 1454 | int sizeof_offset; |
220e750f | 1455 | |
91d6fa6a NC |
1456 | sizeof_offset = out_header (line_seg, &exp); |
1457 | line_end = exp.X_add_symbol; | |
220e750f RH |
1458 | |
1459 | /* Version. */ | |
fc0eebac | 1460 | out_two (DWARF2_VERSION); |
220e750f RH |
1461 | |
1462 | /* Length of the prologue following this length. */ | |
413a266c | 1463 | prologue_end = symbol_temp_make (); |
91d6fa6a NC |
1464 | exp.X_add_symbol = prologue_end; |
1465 | exp.X_add_number = - (4 + 2 + 4); | |
1466 | emit_expr (&exp, sizeof_offset); | |
220e750f RH |
1467 | |
1468 | /* Parameters of the state machine. */ | |
1469 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1470 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1471 | out_byte (DWARF2_LINE_BASE); | |
1472 | out_byte (DWARF2_LINE_RANGE); | |
1473 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1474 | ||
1475 | /* Standard opcode lengths. */ | |
1476 | out_byte (0); /* DW_LNS_copy */ | |
1477 | out_byte (1); /* DW_LNS_advance_pc */ | |
1478 | out_byte (1); /* DW_LNS_advance_line */ | |
1479 | out_byte (1); /* DW_LNS_set_file */ | |
1480 | out_byte (1); /* DW_LNS_set_column */ | |
1481 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1482 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1483 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1484 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1485 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1486 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1487 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1488 | |
1489 | out_file_list (); | |
1490 | ||
b7d6ed97 | 1491 | symbol_set_value_now (prologue_end); |
220e750f RH |
1492 | |
1493 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1494 | for (s = all_segs; s; s = s->next) |
9aec2026 NC |
1495 | if (SEG_NORMAL (s->seg)) |
1496 | process_entries (s->seg, s->head->head); | |
1497 | else | |
1498 | as_warn ("dwarf line number information for %s ignored", | |
1499 | segment_name (s->seg)); | |
220e750f | 1500 | |
b7d6ed97 | 1501 | symbol_set_value_now (line_end); |
220e750f RH |
1502 | } |
1503 | ||
802f5d9e NC |
1504 | static void |
1505 | out_debug_ranges (segT ranges_seg) | |
1506 | { | |
1507 | unsigned int addr_size = sizeof_address; | |
1508 | struct line_seg *s; | |
91d6fa6a | 1509 | expressionS exp; |
802f5d9e NC |
1510 | unsigned int i; |
1511 | ||
1512 | subseg_set (ranges_seg, 0); | |
1513 | ||
1514 | /* Base Address Entry. */ | |
7fd3924a | 1515 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1516 | out_byte (0xff); |
7fd3924a | 1517 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1518 | out_byte (0); |
1519 | ||
1520 | /* Range List Entry. */ | |
1521 | for (s = all_segs; s; s = s->next) | |
1522 | { | |
1523 | fragS *frag; | |
1524 | symbolS *beg, *end; | |
1525 | ||
1526 | frag = first_frag_for_seg (s->seg); | |
1527 | beg = symbol_temp_new (s->seg, 0, frag); | |
1528 | s->text_start = beg; | |
1529 | ||
1530 | frag = last_frag_for_seg (s->seg); | |
1531 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
1532 | s->text_end = end; | |
1533 | ||
91d6fa6a NC |
1534 | exp.X_op = O_symbol; |
1535 | exp.X_add_symbol = beg; | |
1536 | exp.X_add_number = 0; | |
1537 | emit_expr (&exp, addr_size); | |
802f5d9e | 1538 | |
91d6fa6a NC |
1539 | exp.X_op = O_symbol; |
1540 | exp.X_add_symbol = end; | |
1541 | exp.X_add_number = 0; | |
1542 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
1543 | } |
1544 | ||
1545 | /* End of Range Entry. */ | |
7fd3924a | 1546 | for (i = 0; i < addr_size; i++) |
802f5d9e | 1547 | out_byte (0); |
7fd3924a | 1548 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
1549 | out_byte (0); |
1550 | } | |
1551 | ||
220e750f RH |
1552 | /* Emit data for .debug_aranges. */ |
1553 | ||
58b5739a | 1554 | static void |
a2e22468 | 1555 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1556 | { |
220e750f | 1557 | unsigned int addr_size = sizeof_address; |
220e750f | 1558 | struct line_seg *s; |
91d6fa6a | 1559 | expressionS exp; |
413a266c | 1560 | symbolS *aranges_end; |
220e750f | 1561 | char *p; |
413a266c | 1562 | int sizeof_offset; |
fac0d250 | 1563 | |
91d6fa6a NC |
1564 | sizeof_offset = out_header (aranges_seg, &exp); |
1565 | aranges_end = exp.X_add_symbol; | |
fac0d250 | 1566 | |
220e750f | 1567 | /* Version. */ |
fc0eebac | 1568 | out_two (DWARF2_VERSION); |
4dc7ead9 | 1569 | |
220e750f | 1570 | /* Offset to .debug_info. */ |
413a266c | 1571 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
220e750f RH |
1572 | |
1573 | /* Size of an address (offset portion). */ | |
1574 | out_byte (addr_size); | |
1575 | ||
1576 | /* Size of a segment descriptor. */ | |
1577 | out_byte (0); | |
1578 | ||
1579 | /* Align the header. */ | |
413a266c | 1580 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1581 | |
ee515fb7 | 1582 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1583 | { |
1584 | fragS *frag; | |
1585 | symbolS *beg, *end; | |
1586 | ||
1587 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1588 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1589 | s->text_start = beg; |
1590 | ||
1591 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 1592 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
1593 | s->text_end = end; |
1594 | ||
91d6fa6a NC |
1595 | exp.X_op = O_symbol; |
1596 | exp.X_add_symbol = beg; | |
1597 | exp.X_add_number = 0; | |
1598 | emit_expr (&exp, addr_size); | |
220e750f | 1599 | |
91d6fa6a NC |
1600 | exp.X_op = O_subtract; |
1601 | exp.X_add_symbol = end; | |
1602 | exp.X_op_symbol = beg; | |
1603 | exp.X_add_number = 0; | |
1604 | emit_expr (&exp, addr_size); | |
220e750f | 1605 | } |
4dc7ead9 | 1606 | |
220e750f RH |
1607 | p = frag_more (2 * addr_size); |
1608 | md_number_to_chars (p, 0, addr_size); | |
1609 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c AM |
1610 | |
1611 | symbol_set_value_now (aranges_end); | |
4dc7ead9 RH |
1612 | } |
1613 | ||
220e750f RH |
1614 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1615 | sync with out_debug_info below. */ | |
fac0d250 | 1616 | |
220e750f | 1617 | static void |
413a266c AM |
1618 | out_debug_abbrev (segT abbrev_seg, |
1619 | segT info_seg ATTRIBUTE_UNUSED, | |
1620 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f RH |
1621 | { |
1622 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1623 | |
220e750f RH |
1624 | out_uleb128 (1); |
1625 | out_uleb128 (DW_TAG_compile_unit); | |
1626 | out_byte (DW_CHILDREN_no); | |
413a266c AM |
1627 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) |
1628 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1629 | else | |
1630 | out_abbrev (DW_AT_stmt_list, DW_FORM_data8); | |
220e750f | 1631 | if (all_segs->next == NULL) |
4dc7ead9 | 1632 | { |
220e750f RH |
1633 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1634 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1635 | } | |
802f5d9e NC |
1636 | else |
1637 | { | |
413a266c | 1638 | if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit) |
802f5d9e NC |
1639 | out_abbrev (DW_AT_ranges, DW_FORM_data4); |
1640 | else | |
1641 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
1642 | } | |
48b91938 | 1643 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1644 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1645 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1646 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1647 | out_abbrev (0, 0); | |
a987bfc9 RH |
1648 | |
1649 | /* Terminate the abbreviations for this compilation unit. */ | |
1650 | out_byte (0); | |
220e750f | 1651 | } |
4dc7ead9 | 1652 | |
220e750f | 1653 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1654 | |
220e750f | 1655 | static void |
802f5d9e | 1656 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) |
220e750f RH |
1657 | { |
1658 | char producer[128]; | |
3d6b762c JM |
1659 | const char *comp_dir; |
1660 | const char *dirname; | |
91d6fa6a | 1661 | expressionS exp; |
220e750f RH |
1662 | symbolS *info_end; |
1663 | char *p; | |
1664 | int len; | |
14e777e0 | 1665 | int sizeof_offset; |
4dc7ead9 | 1666 | |
91d6fa6a NC |
1667 | sizeof_offset = out_header (info_seg, &exp); |
1668 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 1669 | |
220e750f | 1670 | /* DWARF version. */ |
fc0eebac | 1671 | out_two (DWARF2_VERSION); |
4dc7ead9 | 1672 | |
220e750f | 1673 | /* .debug_abbrev offset */ |
6174d9c8 | 1674 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1675 | |
220e750f RH |
1676 | /* Target address size. */ |
1677 | out_byte (sizeof_address); | |
fac0d250 | 1678 | |
220e750f RH |
1679 | /* DW_TAG_compile_unit DIE abbrev */ |
1680 | out_uleb128 (1); | |
fac0d250 | 1681 | |
220e750f | 1682 | /* DW_AT_stmt_list */ |
413a266c AM |
1683 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
1684 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
1685 | ? 4 : 8)); | |
fac0d250 | 1686 | |
802f5d9e | 1687 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 1688 | if (all_segs->next == NULL) |
58b5739a | 1689 | { |
220e750f | 1690 | /* DW_AT_low_pc */ |
91d6fa6a NC |
1691 | exp.X_op = O_symbol; |
1692 | exp.X_add_symbol = all_segs->text_start; | |
1693 | exp.X_add_number = 0; | |
1694 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
1695 | |
1696 | /* DW_AT_high_pc */ | |
91d6fa6a NC |
1697 | exp.X_op = O_symbol; |
1698 | exp.X_add_symbol = all_segs->text_end; | |
1699 | exp.X_add_number = 0; | |
1700 | emit_expr (&exp, sizeof_address); | |
58b5739a | 1701 | } |
802f5d9e NC |
1702 | else |
1703 | { | |
eb1fe072 NC |
1704 | /* This attribute is emitted if the code is disjoint. */ |
1705 | /* DW_AT_ranges. */ | |
1706 | TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset); | |
802f5d9e | 1707 | } |
58b5739a | 1708 | |
48b91938 RH |
1709 | /* DW_AT_name. We don't have the actual file name that was present |
1710 | on the command line, so assume files[1] is the main input file. | |
1711 | We're not supposed to get called unless at least one line number | |
1712 | entry was emitted, so this should always be defined. */ | |
7fd3924a | 1713 | if (files_in_use == 0) |
48b91938 | 1714 | abort (); |
a7ed1ca2 NC |
1715 | if (files[1].dir) |
1716 | { | |
3d6b762c JM |
1717 | dirname = remap_debug_filename (dirs[files[1].dir]); |
1718 | len = strlen (dirname); | |
198f1251 TG |
1719 | #ifdef TE_VMS |
1720 | /* Already has trailing slash. */ | |
1721 | p = frag_more (len); | |
1722 | memcpy (p, dirname, len); | |
1723 | #else | |
a7ed1ca2 | 1724 | p = frag_more (len + 1); |
3d6b762c | 1725 | memcpy (p, dirname, len); |
56487c55 | 1726 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 1727 | #endif |
a7ed1ca2 | 1728 | } |
48b91938 RH |
1729 | len = strlen (files[1].filename) + 1; |
1730 | p = frag_more (len); | |
1731 | memcpy (p, files[1].filename, len); | |
1732 | ||
220e750f | 1733 | /* DW_AT_comp_dir */ |
3d6b762c | 1734 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
1735 | len = strlen (comp_dir) + 1; |
1736 | p = frag_more (len); | |
1737 | memcpy (p, comp_dir, len); | |
fac0d250 | 1738 | |
220e750f RH |
1739 | /* DW_AT_producer */ |
1740 | sprintf (producer, "GNU AS %s", VERSION); | |
1741 | len = strlen (producer) + 1; | |
1742 | p = frag_more (len); | |
1743 | memcpy (p, producer, len); | |
fac0d250 | 1744 | |
220e750f RH |
1745 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1746 | dwarf2 draft has no standard code for assembler. */ | |
1747 | out_two (DW_LANG_Mips_Assembler); | |
1748 | ||
b7d6ed97 | 1749 | symbol_set_value_now (info_end); |
fac0d250 RH |
1750 | } |
1751 | ||
1e9cc1c2 NC |
1752 | void |
1753 | dwarf2_init (void) | |
1754 | { | |
1755 | all_segs_hash = hash_new (); | |
1756 | last_seg_ptr = &all_segs; | |
1757 | } | |
1758 | ||
1759 | ||
c6cb92c5 NS |
1760 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1761 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
df1c40a7 L |
1762 | file has a non-empty .debug_info section and an empty .debug_line |
1763 | section. If we emit .debug_line, and the .debug_info section is | |
1764 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
1765 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
1766 | or --gdwarf2 was given and there were any located instructions | |
1767 | emitted. */ | |
c6cb92c5 | 1768 | |
fac0d250 | 1769 | void |
a2e22468 | 1770 | dwarf2_finish (void) |
fac0d250 | 1771 | { |
220e750f RH |
1772 | segT line_seg; |
1773 | struct line_seg *s; | |
c6cb92c5 NS |
1774 | segT info_seg; |
1775 | int emit_other_sections = 0; | |
df1c40a7 | 1776 | int empty_debug_line = 0; |
c6cb92c5 NS |
1777 | |
1778 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1779 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1780 | |
df1c40a7 L |
1781 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
1782 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
1783 | ||
1784 | /* We can't construct a new debug_line section if we already have one. | |
1785 | Give an error. */ | |
1786 | if (all_segs && !empty_debug_line) | |
1787 | as_fatal ("duplicate .debug_line sections"); | |
1788 | ||
1789 | if ((!all_segs && emit_other_sections) | |
1790 | || (!emit_other_sections && !empty_debug_line)) | |
1791 | /* If there is no line information and no non-empty .debug_info | |
1792 | section, or if there is both a non-empty .debug_info and a non-empty | |
1793 | .debug_line, then we do nothing. */ | |
220e750f | 1794 | return; |
fac0d250 | 1795 | |
220e750f | 1796 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1797 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1798 | |
220e750f RH |
1799 | /* Create and switch to the line number section. */ |
1800 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1801 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1802 | |
220e750f | 1803 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1804 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1805 | { |
91d6fa6a NC |
1806 | struct line_subseg *lss = s->head; |
1807 | struct line_entry **ptail = lss->ptail; | |
220e750f | 1808 | |
91d6fa6a | 1809 | while ((lss = lss->next) != NULL) |
220e750f | 1810 | { |
91d6fa6a NC |
1811 | *ptail = lss->head; |
1812 | ptail = lss->ptail; | |
220e750f | 1813 | } |
fac0d250 | 1814 | } |
85a39694 | 1815 | |
220e750f | 1816 | out_debug_line (line_seg); |
85a39694 | 1817 | |
c6cb92c5 NS |
1818 | /* If this is assembler generated line info, and there is no |
1819 | debug_info already, we need .debug_info and .debug_abbrev | |
1820 | sections as well. */ | |
1821 | if (emit_other_sections) | |
220e750f RH |
1822 | { |
1823 | segT abbrev_seg; | |
220e750f | 1824 | segT aranges_seg; |
802f5d9e | 1825 | segT ranges_seg; |
4dc7ead9 | 1826 | |
9c2799c2 | 1827 | gas_assert (all_segs); |
7fd3924a | 1828 | |
220e750f RH |
1829 | info_seg = subseg_new (".debug_info", 0); |
1830 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1831 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1832 | |
8a7140c3 NC |
1833 | bfd_set_section_flags (stdoutput, info_seg, |
1834 | SEC_READONLY | SEC_DEBUGGING); | |
1835 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1836 | SEC_READONLY | SEC_DEBUGGING); | |
1837 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1838 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1839 | |
ee515fb7 | 1840 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1841 | |
802f5d9e NC |
1842 | if (all_segs->next == NULL) |
1843 | ranges_seg = NULL; | |
1844 | else | |
1845 | { | |
1846 | ranges_seg = subseg_new (".debug_ranges", 0); | |
7fd3924a | 1847 | bfd_set_section_flags (stdoutput, ranges_seg, |
802f5d9e NC |
1848 | SEC_READONLY | SEC_DEBUGGING); |
1849 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
1850 | out_debug_ranges (ranges_seg); | |
1851 | } | |
1852 | ||
220e750f | 1853 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 1854 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
802f5d9e | 1855 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg); |
220e750f | 1856 | } |
85a39694 | 1857 | } |