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