Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
ec2655a6 | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
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 RH |
27 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
28 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] | |
bd0eb99b | 29 | */ |
fac0d250 | 30 | |
fac0d250 | 31 | #include "as.h" |
bd0eb99b | 32 | #include "safe-ctype.h" |
92eb7b32 | 33 | |
42dbf88c NC |
34 | #ifdef HAVE_LIMITS_H |
35 | #include <limits.h> | |
92625c16 | 36 | #else |
6717891c NC |
37 | #ifdef HAVE_SYS_PARAM_H |
38 | #include <sys/param.h> | |
39 | #endif | |
6256f9dd | 40 | #ifndef INT_MAX |
ee515fb7 | 41 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 42 | #endif |
b8f080d6 | 43 | #endif |
42dbf88c | 44 | |
70658493 | 45 | #include "dwarf2dbg.h" |
a7ed1ca2 | 46 | #include <filenames.h> |
70658493 | 47 | |
56487c55 NC |
48 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
49 | /* We need to decide which character to use as a directory separator. | |
50 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
51 | necessarily mean that the backslash character is the one to use. | |
52 | Some environments, eg Cygwin, can support both naming conventions. | |
53 | So we use the heuristic that we only need to use the backslash if | |
54 | the path is an absolute path starting with a DOS style drive | |
55 | selector. eg C: or D: */ | |
56 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
57 | do \ | |
58 | { \ | |
59 | if (offset > 1 \ | |
60 | && string[0] != 0 \ | |
61 | && string[1] == ':') \ | |
62 | string [offset] = '\\'; \ | |
63 | else \ | |
64 | string [offset] = '/'; \ | |
65 | } \ | |
66 | while (0) | |
67 | #else | |
68 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
69 | #endif | |
70 | ||
14e777e0 | 71 | #ifndef DWARF2_FORMAT |
9605f328 | 72 | # define DWARF2_FORMAT() dwarf2_format_32bit |
14e777e0 KB |
73 | #endif |
74 | ||
9605f328 | 75 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 76 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
77 | #endif |
78 | ||
fac0d250 RH |
79 | #include "subsegs.h" |
80 | ||
d9ac5a3b | 81 | #include "elf/dwarf2.h" |
fac0d250 | 82 | |
fac0d250 RH |
83 | /* Since we can't generate the prolog until the body is complete, we |
84 | use three different subsegments for .debug_line: one holding the | |
85 | prolog, one for the directory and filename info, and one for the | |
86 | body ("statement program"). */ | |
87 | #define DL_PROLOG 0 | |
88 | #define DL_FILES 1 | |
89 | #define DL_BODY 2 | |
90 | ||
1737851b BW |
91 | /* If linker relaxation might change offsets in the code, the DWARF special |
92 | opcodes and variable-length operands cannot be used. If this macro is | |
93 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
94 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
95 | # define DWARF2_USE_FIXED_ADVANCE_PC 0 | |
96 | #endif | |
97 | ||
fac0d250 RH |
98 | /* First special line opcde - leave room for the standard opcodes. |
99 | Note: If you want to change this, you'll have to update the | |
100 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
101 | out_debug_line(). */ |
102 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
103 | |
104 | #ifndef DWARF2_LINE_BASE | |
105 | /* Minimum line offset in a special line info. opcode. This value | |
106 | was chosen to give a reasonable range of values. */ | |
107 | # define DWARF2_LINE_BASE -5 | |
108 | #endif | |
109 | ||
110 | /* Range of line offsets in a special line info. opcode. */ | |
111 | #ifndef DWARF2_LINE_RANGE | |
112 | # define DWARF2_LINE_RANGE 14 | |
113 | #endif | |
114 | ||
115 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
116 | /* Define the architecture-dependent minimum instruction length (in | |
117 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 118 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
119 | #endif |
120 | ||
bd0eb99b | 121 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
122 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
123 | ||
cb30237e | 124 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
125 | #define SPECIAL_LINE(op) \ |
126 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
127 | ||
128 | /* Given a special op, return the address skip amount (in units of | |
129 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
130 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
131 | ||
cb30237e | 132 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
133 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
134 | ||
ee515fb7 | 135 | struct line_entry { |
220e750f | 136 | struct line_entry *next; |
07a53e5c | 137 | symbolS *label; |
220e750f | 138 | struct dwarf2_line_info loc; |
e6c774b4 | 139 | }; |
fac0d250 | 140 | |
ee515fb7 | 141 | struct line_subseg { |
220e750f RH |
142 | struct line_subseg *next; |
143 | subsegT subseg; | |
144 | struct line_entry *head; | |
145 | struct line_entry **ptail; | |
146 | }; | |
353e2c69 | 147 | |
ee515fb7 | 148 | struct line_seg { |
220e750f RH |
149 | struct line_seg *next; |
150 | segT seg; | |
151 | struct line_subseg *head; | |
152 | symbolS *text_start; | |
153 | symbolS *text_end; | |
154 | }; | |
155 | ||
156 | /* Collects data for all line table entries during assembly. */ | |
157 | static struct line_seg *all_segs; | |
158 | ||
ee515fb7 | 159 | struct file_entry { |
a7ed1ca2 | 160 | const char *filename; |
220e750f RH |
161 | unsigned int dir; |
162 | }; | |
163 | ||
164 | /* Table of files used by .debug_line. */ | |
165 | static struct file_entry *files; | |
166 | static unsigned int files_in_use; | |
167 | static unsigned int files_allocated; | |
168 | ||
a7ed1ca2 NC |
169 | /* Table of directories used by .debug_line. */ |
170 | static char **dirs; | |
171 | static unsigned int dirs_in_use; | |
172 | static unsigned int dirs_allocated; | |
173 | ||
b34976b6 | 174 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 175 | doing work when there's nothing to do. */ |
1eee4adc | 176 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 177 | |
07a53e5c RH |
178 | /* TRUE when we're supposed to set the basic block mark whenever a |
179 | label is seen. */ | |
180 | bfd_boolean dwarf2_loc_mark_labels; | |
181 | ||
220e750f | 182 | /* Current location as indicated by the most recent .loc directive. */ |
bd0eb99b RH |
183 | static struct dwarf2_line_info current = { |
184 | 1, 1, 0, 0, | |
185 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0 | |
186 | }; | |
220e750f | 187 | |
220e750f RH |
188 | /* The size of an address on the target. */ |
189 | static unsigned int sizeof_address; | |
190 | \f | |
a2e22468 KH |
191 | static struct line_subseg *get_line_subseg (segT, subsegT); |
192 | static unsigned int get_filenum (const char *, unsigned int); | |
193 | static struct frag *first_frag_for_seg (segT); | |
194 | static struct frag *last_frag_for_seg (segT); | |
195 | static void out_byte (int); | |
196 | static void out_opcode (int); | |
197 | static void out_two (int); | |
198 | static void out_four (int); | |
199 | static void out_abbrev (int, int); | |
200 | static void out_uleb128 (addressT); | |
1737851b | 201 | static void out_sleb128 (addressT); |
c9049d30 | 202 | static offsetT get_frag_fix (fragS *, segT); |
07a53e5c | 203 | static void out_set_addr (symbolS *); |
a2e22468 KH |
204 | static int size_inc_line_addr (int, addressT); |
205 | static void emit_inc_line_addr (int, addressT, char *, int); | |
206 | static void out_inc_line_addr (int, addressT); | |
1737851b | 207 | static void out_fixed_inc_line_addr (int, symbolS *, symbolS *); |
07a53e5c | 208 | static void relax_inc_line_addr (int, symbolS *, symbolS *); |
a2e22468 KH |
209 | static void process_entries (segT, struct line_entry *); |
210 | static void out_file_list (void); | |
211 | static void out_debug_line (segT); | |
212 | static void out_debug_aranges (segT, segT); | |
213 | static void out_debug_abbrev (segT); | |
220e750f | 214 | \f |
c5c0a210 | 215 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 216 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 217 | |
6174d9c8 RH |
218 | /* Create an offset to .dwarf2_*. */ |
219 | ||
220 | static void | |
a2e22468 | 221 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 RH |
222 | { |
223 | expressionS expr; | |
224 | ||
225 | expr.X_op = O_symbol; | |
226 | expr.X_add_symbol = symbol; | |
227 | expr.X_add_number = 0; | |
228 | emit_expr (&expr, size); | |
229 | } | |
c5c0a210 | 230 | #endif |
6174d9c8 | 231 | |
220e750f RH |
232 | /* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */ |
233 | ||
234 | static struct line_subseg * | |
a2e22468 | 235 | get_line_subseg (segT seg, subsegT subseg) |
220e750f RH |
236 | { |
237 | static segT last_seg; | |
238 | static subsegT last_subseg; | |
239 | static struct line_subseg *last_line_subseg; | |
240 | ||
001ae1a4 | 241 | struct line_seg **ps, *s; |
220e750f | 242 | struct line_subseg **pss, *ss; |
fac0d250 | 243 | |
220e750f RH |
244 | if (seg == last_seg && subseg == last_subseg) |
245 | return last_line_subseg; | |
246 | ||
001ae1a4 | 247 | for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next) |
220e750f RH |
248 | if (s->seg == seg) |
249 | goto found_seg; | |
250 | ||
251 | s = (struct line_seg *) xmalloc (sizeof (*s)); | |
001ae1a4 | 252 | s->next = NULL; |
220e750f RH |
253 | s->seg = seg; |
254 | s->head = NULL; | |
001ae1a4 | 255 | *ps = s; |
220e750f RH |
256 | |
257 | found_seg: | |
258 | for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next) | |
fac0d250 | 259 | { |
220e750f | 260 | if (ss->subseg == subseg) |
ee515fb7 | 261 | goto found_subseg; |
220e750f RH |
262 | if (ss->subseg > subseg) |
263 | break; | |
fac0d250 | 264 | } |
220e750f RH |
265 | |
266 | ss = (struct line_subseg *) xmalloc (sizeof (*ss)); | |
267 | ss->next = *pss; | |
268 | ss->subseg = subseg; | |
269 | ss->head = NULL; | |
270 | ss->ptail = &ss->head; | |
271 | *pss = ss; | |
272 | ||
273 | found_subseg: | |
274 | last_seg = seg; | |
275 | last_subseg = subseg; | |
276 | last_line_subseg = ss; | |
277 | ||
278 | return ss; | |
fac0d250 RH |
279 | } |
280 | ||
07a53e5c RH |
281 | /* Record an entry for LOC occurring at LABEL. */ |
282 | ||
283 | static void | |
284 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) | |
285 | { | |
286 | struct line_subseg *ss; | |
287 | struct line_entry *e; | |
288 | ||
289 | e = (struct line_entry *) xmalloc (sizeof (*e)); | |
290 | e->next = NULL; | |
291 | e->label = label; | |
292 | e->loc = *loc; | |
293 | ||
294 | ss = get_line_subseg (now_seg, now_subseg); | |
295 | *ss->ptail = e; | |
296 | ss->ptail = &e->next; | |
297 | } | |
298 | ||
436d9e46 | 299 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 300 | |
220e750f | 301 | void |
a2e22468 | 302 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 303 | { |
1ea5c325 MS |
304 | static unsigned int line = -1; |
305 | static unsigned int filenum = -1; | |
220e750f | 306 | |
07a53e5c RH |
307 | symbolS *sym; |
308 | ||
220e750f RH |
309 | /* Early out for as-yet incomplete location information. */ |
310 | if (loc->filenum == 0 || loc->line == 0) | |
311 | return; | |
312 | ||
ffa554ed GK |
313 | /* Don't emit sequences of line symbols for the same line when the |
314 | symbols apply to assembler code. It is necessary to emit | |
315 | duplicate line symbols when a compiler asks for them, because GDB | |
316 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 317 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 318 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
319 | return; |
320 | ||
321 | line = loc->line; | |
322 | filenum = loc->filenum; | |
323 | ||
07a53e5c RH |
324 | sym = symbol_temp_new (now_seg, ofs, frag_now); |
325 | dwarf2_gen_line_info_1 (sym, loc); | |
220e750f | 326 | } |
fac0d250 | 327 | |
ecea7679 RH |
328 | /* Returns the current source information. If .file directives have |
329 | been encountered, the info for the corresponding source file is | |
330 | returned. Otherwise, the info for the assembly source file is | |
331 | returned. */ | |
332 | ||
220e750f | 333 | void |
a2e22468 | 334 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
335 | { |
336 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 337 | { |
220e750f RH |
338 | char *filename; |
339 | as_where (&filename, &line->line); | |
a7ed1ca2 | 340 | line->filenum = get_filenum (filename, 0); |
220e750f | 341 | line->column = 0; |
bd0eb99b | 342 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 343 | line->isa = current.isa; |
fac0d250 | 344 | } |
220e750f RH |
345 | else |
346 | *line = current; | |
fac0d250 RH |
347 | } |
348 | ||
ecea7679 RH |
349 | /* A hook to allow the target backend to inform the line number state |
350 | machine of isa changes when assembler debug info is enabled. */ | |
351 | ||
352 | void | |
353 | dwarf2_set_isa (unsigned int isa) | |
354 | { | |
355 | current.isa = isa; | |
356 | } | |
357 | ||
220e750f RH |
358 | /* Called for each machine instruction, or relatively atomic group of |
359 | machine instructions (ie built-in macro). The instruction or group | |
360 | is SIZE bytes in length. If dwarf2 line number generation is called | |
361 | for, emit a line statement appropriately. */ | |
353e2c69 | 362 | |
220e750f | 363 | void |
a2e22468 | 364 | dwarf2_emit_insn (int size) |
fac0d250 | 365 | { |
220e750f | 366 | struct dwarf2_line_info loc; |
fac0d250 | 367 | |
1eee4adc | 368 | if (dwarf2_loc_directive_seen) |
1080e97d L |
369 | { |
370 | /* Use the last location established by a .loc directive, not | |
371 | the value returned by dwarf2_where(). That calls as_where() | |
372 | which will return either the logical input file name (foo.c) | |
373 | or the physical input file name (foo.s) and not the file name | |
374 | specified in the most recent .loc directive (eg foo.h). */ | |
375 | loc = current; | |
1080e97d | 376 | } |
b6675117 | 377 | else if (debug_type != DEBUG_DWARF2) |
220e750f | 378 | return; |
b6675117 | 379 | else |
bd0eb99b | 380 | dwarf2_where (&loc); |
b6675117 | 381 | |
220e750f | 382 | dwarf2_gen_line_info (frag_now_fix () - size, &loc); |
661ba50f BW |
383 | dwarf2_consume_line_info (); |
384 | } | |
385 | ||
386 | /* Called after the current line information has been either used with | |
387 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
388 | This resets the state of the line number information to reflect that | |
389 | it has been used. */ | |
390 | ||
391 | void | |
392 | dwarf2_consume_line_info (void) | |
393 | { | |
394 | /* Unless we generate DWARF2 debugging information for each | |
395 | assembler line, we only emit one line symbol for one LOC. */ | |
396 | if (debug_type != DEBUG_DWARF2) | |
1eee4adc | 397 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
398 | |
399 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
400 | | DWARF2_FLAG_PROLOGUE_END | |
401 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
220e750f | 402 | } |
fac0d250 | 403 | |
07a53e5c RH |
404 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
405 | is enabled, emit a basic block marker. */ | |
406 | ||
407 | void | |
408 | dwarf2_emit_label (symbolS *label) | |
409 | { | |
410 | struct dwarf2_line_info loc; | |
411 | ||
412 | if (!dwarf2_loc_mark_labels) | |
413 | return; | |
414 | if (S_GET_SEGMENT (label) != now_seg) | |
415 | return; | |
416 | if (!(bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)) | |
417 | return; | |
418 | ||
419 | if (debug_type == DEBUG_DWARF2) | |
420 | dwarf2_where (&loc); | |
421 | else | |
00462d01 | 422 | loc = current; |
07a53e5c RH |
423 | |
424 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
425 | ||
00462d01 | 426 | dwarf2_consume_line_info (); |
07a53e5c RH |
427 | dwarf2_gen_line_info_1 (label, &loc); |
428 | } | |
429 | ||
a7ed1ca2 NC |
430 | /* Get a .debug_line file number for FILENAME. If NUM is nonzero, |
431 | allocate it on that file table slot, otherwise return the first | |
432 | empty one. */ | |
220e750f RH |
433 | |
434 | static unsigned int | |
a2e22468 | 435 | get_filenum (const char *filename, unsigned int num) |
220e750f | 436 | { |
a7ed1ca2 NC |
437 | static unsigned int last_used, last_used_dir_len; |
438 | const char *file; | |
439 | size_t dir_len; | |
440 | unsigned int i, dir; | |
220e750f | 441 | |
a7ed1ca2 NC |
442 | if (num == 0 && last_used) |
443 | { | |
444 | if (! files[last_used].dir | |
445 | && strcmp (filename, files[last_used].filename) == 0) | |
446 | return last_used; | |
447 | if (files[last_used].dir | |
448 | && strncmp (filename, dirs[files[last_used].dir], | |
449 | last_used_dir_len) == 0 | |
450 | && IS_DIR_SEPARATOR (filename [last_used_dir_len]) | |
451 | && strcmp (filename + last_used_dir_len + 1, | |
452 | files[last_used].filename) == 0) | |
453 | return last_used; | |
454 | } | |
220e750f | 455 | |
a7ed1ca2 NC |
456 | file = lbasename (filename); |
457 | /* Don't make empty string from / or A: from A:/ . */ | |
458 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
459 | if (file <= filename + 3) | |
460 | file = filename; | |
461 | #else | |
462 | if (file == filename + 1) | |
463 | file = filename; | |
464 | #endif | |
465 | dir_len = file - filename; | |
466 | ||
467 | dir = 0; | |
468 | if (dir_len) | |
469 | { | |
470 | --dir_len; | |
471 | for (dir = 1; dir < dirs_in_use; ++dir) | |
4dde8e61 | 472 | if (strncmp (filename, dirs[dir], dir_len) == 0 |
a7ed1ca2 NC |
473 | && dirs[dir][dir_len] == '\0') |
474 | break; | |
475 | ||
476 | if (dir >= dirs_in_use) | |
477 | { | |
478 | if (dir >= dirs_allocated) | |
479 | { | |
480 | dirs_allocated = dir + 32; | |
481 | dirs = (char **) | |
482 | xrealloc (dirs, (dir + 32) * sizeof (const char *)); | |
483 | } | |
484 | ||
485 | dirs[dir] = xmalloc (dir_len + 1); | |
486 | memcpy (dirs[dir], filename, dir_len); | |
487 | dirs[dir][dir_len] = '\0'; | |
488 | dirs_in_use = dir + 1; | |
489 | } | |
490 | } | |
491 | ||
492 | if (num == 0) | |
493 | { | |
494 | for (i = 1; i < files_in_use; ++i) | |
495 | if (files[i].dir == dir | |
88b4ca40 | 496 | && files[i].filename |
a7ed1ca2 NC |
497 | && strcmp (file, files[i].filename) == 0) |
498 | { | |
499 | last_used = i; | |
500 | last_used_dir_len = dir_len; | |
501 | return i; | |
502 | } | |
503 | } | |
504 | else | |
505 | i = num; | |
220e750f RH |
506 | |
507 | if (i >= files_allocated) | |
fac0d250 | 508 | { |
249e3833 RH |
509 | unsigned int old = files_allocated; |
510 | ||
220e750f RH |
511 | files_allocated = i + 32; |
512 | files = (struct file_entry *) | |
ee515fb7 | 513 | xrealloc (files, (i + 32) * sizeof (struct file_entry)); |
249e3833 RH |
514 | |
515 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
fac0d250 RH |
516 | } |
517 | ||
a7ed1ca2 NC |
518 | files[i].filename = num ? file : xstrdup (file); |
519 | files[i].dir = dir; | |
10cd14b4 AM |
520 | if (files_in_use < i + 1) |
521 | files_in_use = i + 1; | |
220e750f | 522 | last_used = i; |
a7ed1ca2 | 523 | last_used_dir_len = dir_len; |
220e750f RH |
524 | |
525 | return i; | |
526 | } | |
fac0d250 | 527 | |
ecb4347a DJ |
528 | /* Handle two forms of .file directive: |
529 | - Pass .file "source.c" to s_app_file | |
530 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 531 | |
ecb4347a DJ |
532 | If an entry is added to the file table, return a pointer to the filename. */ |
533 | ||
534 | char * | |
a2e22468 | 535 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) |
220e750f RH |
536 | { |
537 | offsetT num; | |
e46d99eb | 538 | char *filename; |
220e750f RH |
539 | int filename_len; |
540 | ||
541 | /* Continue to accept a bare string and pass it off. */ | |
542 | SKIP_WHITESPACE (); | |
543 | if (*input_line_pointer == '"') | |
fac0d250 | 544 | { |
220e750f | 545 | s_app_file (0); |
ecb4347a | 546 | return NULL; |
fac0d250 RH |
547 | } |
548 | ||
220e750f RH |
549 | num = get_absolute_expression (); |
550 | filename = demand_copy_C_string (&filename_len); | |
bd0eb99b RH |
551 | if (filename == NULL) |
552 | return NULL; | |
220e750f RH |
553 | demand_empty_rest_of_line (); |
554 | ||
249e3833 | 555 | if (num < 1) |
fac0d250 | 556 | { |
0e389e77 | 557 | as_bad (_("file number less than one")); |
ecb4347a | 558 | return NULL; |
fac0d250 RH |
559 | } |
560 | ||
0e1a166b | 561 | if (num < (int) files_in_use && files[num].filename != 0) |
220e750f | 562 | { |
0e389e77 | 563 | as_bad (_("file number %ld already allocated"), (long) num); |
ecb4347a | 564 | return NULL; |
249e3833 | 565 | } |
220e750f | 566 | |
a7ed1ca2 | 567 | get_filenum (filename, num); |
ecb4347a DJ |
568 | |
569 | return filename; | |
fac0d250 RH |
570 | } |
571 | ||
220e750f | 572 | void |
a2e22468 | 573 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 574 | { |
ecea7679 RH |
575 | offsetT filenum, line; |
576 | ||
851feff8 DJ |
577 | /* If we see two .loc directives in a row, force the first one to be |
578 | output now. */ | |
1eee4adc | 579 | if (dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2) |
851feff8 DJ |
580 | dwarf2_emit_insn (0); |
581 | ||
ecea7679 RH |
582 | filenum = get_absolute_expression (); |
583 | SKIP_WHITESPACE (); | |
584 | line = get_absolute_expression (); | |
585 | ||
586 | if (filenum < 1) | |
587 | { | |
588 | as_bad (_("file number less than one")); | |
589 | return; | |
590 | } | |
591 | if (filenum >= (int) files_in_use || files[filenum].filename == 0) | |
592 | { | |
593 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
594 | return; | |
595 | } | |
596 | ||
597 | current.filenum = filenum; | |
598 | current.line = line; | |
599 | ||
600 | #ifndef NO_LISTING | |
601 | if (listing) | |
602 | { | |
603 | if (files[filenum].dir) | |
604 | { | |
605 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
606 | size_t file_len = strlen (files[filenum].filename); | |
607 | char *cp = (char *) alloca (dir_len + 1 + file_len + 1); | |
608 | ||
609 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 610 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
611 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
612 | cp[dir_len + file_len + 1] = '\0'; | |
613 | listing_source_file (cp); | |
614 | } | |
615 | else | |
616 | listing_source_file (files[filenum].filename); | |
617 | listing_source_line (line); | |
618 | } | |
619 | #endif | |
620 | ||
220e750f | 621 | SKIP_WHITESPACE (); |
ecea7679 RH |
622 | if (ISDIGIT (*input_line_pointer)) |
623 | { | |
624 | current.column = get_absolute_expression (); | |
625 | SKIP_WHITESPACE (); | |
626 | } | |
627 | ||
628 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 629 | { |
bd0eb99b RH |
630 | char *p, c; |
631 | offsetT value; | |
632 | ||
633 | p = input_line_pointer; | |
634 | c = get_symbol_end (); | |
635 | ||
636 | if (strcmp (p, "basic_block") == 0) | |
637 | { | |
638 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
639 | *input_line_pointer = c; | |
640 | } | |
641 | else if (strcmp (p, "prologue_end") == 0) | |
642 | { | |
643 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
644 | *input_line_pointer = c; | |
645 | } | |
646 | else if (strcmp (p, "epilogue_begin") == 0) | |
647 | { | |
648 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
649 | *input_line_pointer = c; | |
650 | } | |
651 | else if (strcmp (p, "is_stmt") == 0) | |
652 | { | |
653 | *input_line_pointer = c; | |
654 | value = get_absolute_expression (); | |
655 | if (value == 0) | |
656 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
657 | else if (value == 1) | |
658 | current.flags |= DWARF2_FLAG_IS_STMT; | |
659 | else | |
ecea7679 RH |
660 | { |
661 | as_bad (_("is_stmt value not 0 or 1")); | |
662 | return; | |
663 | } | |
bd0eb99b RH |
664 | } |
665 | else if (strcmp (p, "isa") == 0) | |
666 | { | |
667 | *input_line_pointer = c; | |
668 | value = get_absolute_expression (); | |
ecea7679 | 669 | if (value >= 0) |
bd0eb99b | 670 | current.isa = value; |
ecea7679 RH |
671 | else |
672 | { | |
673 | as_bad (_("isa number less than zero")); | |
674 | return; | |
675 | } | |
bd0eb99b RH |
676 | } |
677 | else | |
678 | { | |
ecea7679 | 679 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
bd0eb99b | 680 | *input_line_pointer = c; |
bd0eb99b RH |
681 | return; |
682 | } | |
683 | ||
ecea7679 | 684 | SKIP_WHITESPACE (); |
bd0eb99b RH |
685 | } |
686 | ||
687 | demand_empty_rest_of_line (); | |
1eee4adc | 688 | dwarf2_loc_directive_seen = TRUE; |
220e750f | 689 | } |
07a53e5c RH |
690 | |
691 | void | |
692 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
693 | { | |
694 | offsetT value = get_absolute_expression (); | |
695 | ||
696 | if (value != 0 && value != 1) | |
697 | { | |
698 | as_bad (_("expected 0 or 1")); | |
699 | ignore_rest_of_line (); | |
700 | } | |
701 | else | |
702 | { | |
703 | dwarf2_loc_mark_labels = value != 0; | |
704 | demand_empty_rest_of_line (); | |
705 | } | |
706 | } | |
220e750f RH |
707 | \f |
708 | static struct frag * | |
a2e22468 | 709 | first_frag_for_seg (segT seg) |
220e750f | 710 | { |
c9049d30 | 711 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
712 | } |
713 | ||
714 | static struct frag * | |
a2e22468 | 715 | last_frag_for_seg (segT seg) |
220e750f | 716 | { |
c9049d30 | 717 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 718 | |
c9049d30 AM |
719 | while (f->frch_next != NULL) |
720 | f = f->frch_next; | |
220e750f | 721 | |
c9049d30 | 722 | return f->frch_last; |
220e750f RH |
723 | } |
724 | \f | |
725 | /* Emit a single byte into the current segment. */ | |
726 | ||
727 | static inline void | |
a2e22468 | 728 | out_byte (int byte) |
220e750f RH |
729 | { |
730 | FRAG_APPEND_1_CHAR (byte); | |
731 | } | |
732 | ||
733 | /* Emit a statement program opcode into the current segment. */ | |
734 | ||
735 | static inline void | |
a2e22468 | 736 | out_opcode (int opc) |
220e750f RH |
737 | { |
738 | out_byte (opc); | |
739 | } | |
740 | ||
741 | /* Emit a two-byte word into the current segment. */ | |
742 | ||
743 | static inline void | |
a2e22468 | 744 | out_two (int data) |
220e750f RH |
745 | { |
746 | md_number_to_chars (frag_more (2), data, 2); | |
747 | } | |
748 | ||
749 | /* Emit a four byte word into the current segment. */ | |
750 | ||
751 | static inline void | |
a2e22468 | 752 | out_four (int data) |
220e750f RH |
753 | { |
754 | md_number_to_chars (frag_more (4), data, 4); | |
755 | } | |
756 | ||
757 | /* Emit an unsigned "little-endian base 128" number. */ | |
758 | ||
fac0d250 | 759 | static void |
a2e22468 | 760 | out_uleb128 (addressT value) |
220e750f RH |
761 | { |
762 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
763 | } | |
764 | ||
1737851b BW |
765 | /* Emit a signed "little-endian base 128" number. */ |
766 | ||
767 | static void | |
768 | out_sleb128 (addressT value) | |
769 | { | |
770 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
771 | } | |
772 | ||
220e750f RH |
773 | /* Emit a tuple for .debug_abbrev. */ |
774 | ||
775 | static inline void | |
a2e22468 | 776 | out_abbrev (int name, int form) |
fac0d250 | 777 | { |
220e750f RH |
778 | out_uleb128 (name); |
779 | out_uleb128 (form); | |
780 | } | |
fac0d250 | 781 | |
220e750f | 782 | /* Get the size of a fragment. */ |
fac0d250 | 783 | |
220e750f | 784 | static offsetT |
c9049d30 | 785 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
786 | { |
787 | frchainS *fr; | |
788 | ||
789 | if (frag->fr_next) | |
790 | return frag->fr_fix; | |
791 | ||
792 | /* If a fragment is the last in the chain, special measures must be | |
793 | taken to find its size before relaxation, since it may be pending | |
794 | on some subsegment chain. */ | |
c9049d30 | 795 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 796 | if (fr->frch_last == frag) |
c5c0a210 | 797 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
798 | |
799 | abort (); | |
800 | } | |
fac0d250 | 801 | |
220e750f | 802 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 803 | |
220e750f | 804 | static void |
07a53e5c | 805 | out_set_addr (symbolS *sym) |
220e750f RH |
806 | { |
807 | expressionS expr; | |
9e3af0e7 | 808 | |
fac0d250 | 809 | out_opcode (DW_LNS_extended_op); |
220e750f | 810 | out_uleb128 (sizeof_address + 1); |
fac0d250 RH |
811 | |
812 | out_opcode (DW_LNE_set_address); | |
813 | expr.X_op = O_symbol; | |
814 | expr.X_add_symbol = sym; | |
815 | expr.X_add_number = 0; | |
220e750f | 816 | emit_expr (&expr, sizeof_address); |
fac0d250 RH |
817 | } |
818 | ||
a3b75434 | 819 | #if DWARF2_LINE_MIN_INSN_LENGTH > 1 |
a2e22468 | 820 | static void scale_addr_delta (addressT *); |
c8970b4b | 821 | |
a3b75434 | 822 | static void |
d7342424 | 823 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
824 | { |
825 | static int printed_this = 0; | |
826 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0) | |
827 | { | |
828 | if (!printed_this) | |
829 | as_bad("unaligned opcodes detected in executable segment"); | |
830 | printed_this = 1; | |
831 | } | |
832 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; | |
833 | } | |
834 | #else | |
835 | #define scale_addr_delta(A) | |
836 | #endif | |
837 | ||
220e750f RH |
838 | /* Encode a pair of line and address skips as efficiently as possible. |
839 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 840 | |
220e750f RH |
841 | The following two routines *must* be kept in sync. This is |
842 | enforced by making emit_inc_line_addr abort if we do not emit | |
843 | exactly the expected number of bytes. */ | |
844 | ||
845 | static int | |
a2e22468 | 846 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 847 | { |
220e750f RH |
848 | unsigned int tmp, opcode; |
849 | int len = 0; | |
fac0d250 | 850 | |
220e750f | 851 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 852 | scale_addr_delta (&addr_delta); |
220e750f RH |
853 | |
854 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
855 | We cannot use special opcodes here, since we want the end_sequence | |
856 | to emit the matrix entry. */ | |
857 | if (line_delta == INT_MAX) | |
fac0d250 | 858 | { |
220e750f RH |
859 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
860 | len = 1; | |
fac0d250 | 861 | else |
220e750f RH |
862 | len = 1 + sizeof_leb128 (addr_delta, 0); |
863 | return len + 3; | |
fac0d250 | 864 | } |
fac0d250 | 865 | |
220e750f RH |
866 | /* Bias the line delta by the base. */ |
867 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 868 | |
220e750f RH |
869 | /* If the line increment is out of range of a special opcode, we |
870 | must encode it with DW_LNS_advance_line. */ | |
871 | if (tmp >= DWARF2_LINE_RANGE) | |
872 | { | |
873 | len = 1 + sizeof_leb128 (line_delta, 1); | |
874 | line_delta = 0; | |
875 | tmp = 0 - DWARF2_LINE_BASE; | |
876 | } | |
fac0d250 | 877 | |
220e750f RH |
878 | /* Bias the opcode by the special opcode base. */ |
879 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 880 | |
220e750f RH |
881 | /* Avoid overflow when addr_delta is large. */ |
882 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
883 | { | |
884 | /* Try using a special opcode. */ | |
885 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
886 | if (opcode <= 255) | |
887 | return len + 1; | |
888 | ||
889 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
890 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
891 | if (opcode <= 255) | |
892 | return len + 2; | |
893 | } | |
894 | ||
895 | /* Otherwise use DW_LNS_advance_pc. */ | |
896 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
897 | ||
898 | /* DW_LNS_copy or special opcode. */ | |
899 | len += 1; | |
900 | ||
901 | return len; | |
902 | } | |
fac0d250 | 903 | |
220e750f | 904 | static void |
a2e22468 | 905 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
906 | { |
907 | unsigned int tmp, opcode; | |
908 | int need_copy = 0; | |
909 | char *end = p + len; | |
fac0d250 | 910 | |
07a53e5c RH |
911 | /* Line number sequences cannot go backward in addresses. This means |
912 | we've incorrectly ordered the statements in the sequence. */ | |
913 | assert ((offsetT) addr_delta >= 0); | |
914 | ||
220e750f | 915 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
916 | scale_addr_delta (&addr_delta); |
917 | ||
220e750f RH |
918 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
919 | We cannot use special opcodes here, since we want the end_sequence | |
920 | to emit the matrix entry. */ | |
921 | if (line_delta == INT_MAX) | |
fac0d250 | 922 | { |
220e750f RH |
923 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
924 | *p++ = DW_LNS_const_add_pc; | |
925 | else | |
fac0d250 | 926 | { |
220e750f RH |
927 | *p++ = DW_LNS_advance_pc; |
928 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 929 | } |
220e750f RH |
930 | |
931 | *p++ = DW_LNS_extended_op; | |
932 | *p++ = 1; | |
933 | *p++ = DW_LNE_end_sequence; | |
934 | goto done; | |
fac0d250 RH |
935 | } |
936 | ||
220e750f RH |
937 | /* Bias the line delta by the base. */ |
938 | tmp = line_delta - DWARF2_LINE_BASE; | |
939 | ||
940 | /* If the line increment is out of range of a special opcode, we | |
941 | must encode it with DW_LNS_advance_line. */ | |
942 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 943 | { |
220e750f RH |
944 | *p++ = DW_LNS_advance_line; |
945 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 946 | |
220e750f RH |
947 | line_delta = 0; |
948 | tmp = 0 - DWARF2_LINE_BASE; | |
949 | need_copy = 1; | |
950 | } | |
fac0d250 | 951 | |
bd0eb99b RH |
952 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
953 | special opcode. */ | |
954 | if (line_delta == 0 && addr_delta == 0) | |
955 | { | |
956 | *p++ = DW_LNS_copy; | |
957 | goto done; | |
958 | } | |
959 | ||
220e750f RH |
960 | /* Bias the opcode by the special opcode base. */ |
961 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 962 | |
220e750f RH |
963 | /* Avoid overflow when addr_delta is large. */ |
964 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 965 | { |
220e750f RH |
966 | /* Try using a special opcode. */ |
967 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
968 | if (opcode <= 255) | |
969 | { | |
970 | *p++ = opcode; | |
971 | goto done; | |
972 | } | |
973 | ||
974 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
975 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
976 | if (opcode <= 255) | |
fac0d250 | 977 | { |
220e750f RH |
978 | *p++ = DW_LNS_const_add_pc; |
979 | *p++ = opcode; | |
980 | goto done; | |
fac0d250 RH |
981 | } |
982 | } | |
220e750f RH |
983 | |
984 | /* Otherwise use DW_LNS_advance_pc. */ | |
985 | *p++ = DW_LNS_advance_pc; | |
986 | p += output_leb128 (p, addr_delta, 0); | |
987 | ||
988 | if (need_copy) | |
989 | *p++ = DW_LNS_copy; | |
fac0d250 | 990 | else |
220e750f | 991 | *p++ = tmp; |
fac0d250 | 992 | |
220e750f RH |
993 | done: |
994 | assert (p == end); | |
995 | } | |
a8316fe2 | 996 | |
220e750f | 997 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 998 | |
220e750f | 999 | static void |
a2e22468 | 1000 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1001 | { |
1002 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1003 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1004 | } | |
9de8d8f1 | 1005 | |
1737851b BW |
1006 | /* Write out an alternative form of line and address skips using |
1007 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
1008 | line and address information, but it helps support linker relaxation that | |
1009 | changes the code offsets. */ | |
1010 | ||
1011 | static void | |
1012 | out_fixed_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) | |
1013 | { | |
1014 | expressionS expr; | |
1015 | ||
1016 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
1017 | if (line_delta == INT_MAX) | |
1018 | { | |
1019 | out_opcode (DW_LNS_fixed_advance_pc); | |
1020 | expr.X_op = O_subtract; | |
1021 | expr.X_add_symbol = to_sym; | |
1022 | expr.X_op_symbol = from_sym; | |
1023 | expr.X_add_number = 0; | |
1024 | emit_expr (&expr, 2); | |
1025 | ||
1026 | out_opcode (DW_LNS_extended_op); | |
1027 | out_byte (1); | |
1028 | out_opcode (DW_LNE_end_sequence); | |
1029 | return; | |
1030 | } | |
1031 | ||
1032 | out_opcode (DW_LNS_advance_line); | |
1033 | out_sleb128 (line_delta); | |
1034 | ||
1035 | out_opcode (DW_LNS_fixed_advance_pc); | |
1036 | expr.X_op = O_subtract; | |
1037 | expr.X_add_symbol = to_sym; | |
1038 | expr.X_op_symbol = from_sym; | |
1039 | expr.X_add_number = 0; | |
1040 | emit_expr (&expr, 2); | |
1041 | ||
1042 | out_opcode (DW_LNS_copy); | |
1043 | } | |
1044 | ||
220e750f RH |
1045 | /* Generate a variant frag that we can use to relax address/line |
1046 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1047 | |
220e750f | 1048 | static void |
07a53e5c | 1049 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1050 | { |
220e750f RH |
1051 | expressionS expr; |
1052 | int max_chars; | |
6576f0b5 | 1053 | |
220e750f RH |
1054 | expr.X_op = O_subtract; |
1055 | expr.X_add_symbol = to_sym; | |
1056 | expr.X_op_symbol = from_sym; | |
1057 | expr.X_add_number = 0; | |
fac0d250 | 1058 | |
220e750f RH |
1059 | /* The maximum size of the frag is the line delta with a maximum |
1060 | sized address delta. */ | |
1061 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1062 | |
220e750f RH |
1063 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
1064 | make_expr_symbol (&expr), line_delta, NULL); | |
1065 | } | |
fac0d250 | 1066 | |
220e750f RH |
1067 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1068 | based on the current values of the symbols. It is called before | |
1069 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1070 | |
220e750f | 1071 | int |
a2e22468 | 1072 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1073 | { |
1074 | offsetT addr_delta; | |
1075 | int size; | |
fac0d250 | 1076 | |
6386f3a7 | 1077 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
220e750f | 1078 | size = size_inc_line_addr (frag->fr_offset, addr_delta); |
fac0d250 | 1079 | |
220e750f | 1080 | frag->fr_subtype = size; |
fac0d250 | 1081 | |
220e750f RH |
1082 | return size; |
1083 | } | |
1084 | ||
1085 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1086 | current values of the symbols. fr_subtype is the current length | |
1087 | of the frag. This returns the change in frag length. */ | |
1088 | ||
1089 | int | |
a2e22468 | 1090 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1091 | { |
1092 | int old_size, new_size; | |
fac0d250 | 1093 | |
220e750f RH |
1094 | old_size = frag->fr_subtype; |
1095 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1096 | |
220e750f | 1097 | return new_size - old_size; |
fac0d250 RH |
1098 | } |
1099 | ||
220e750f RH |
1100 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1101 | fill frag. This is called after all relaxation has been done. | |
1102 | fr_subtype will be the desired length of the frag. */ | |
1103 | ||
1104 | void | |
a2e22468 | 1105 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1106 | { |
220e750f RH |
1107 | offsetT addr_diff; |
1108 | ||
6386f3a7 | 1109 | addr_diff = resolve_symbol_value (frag->fr_symbol); |
fac0d250 | 1110 | |
220e750f RH |
1111 | /* fr_var carries the max_chars that we created the fragment with. |
1112 | fr_subtype carries the current expected length. We must, of | |
1113 | course, have allocated enough memory earlier. */ | |
bccba5f0 | 1114 | assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1115 | |
ee515fb7 | 1116 | emit_inc_line_addr (frag->fr_offset, addr_diff, |
220e750f RH |
1117 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); |
1118 | ||
1119 | frag->fr_fix += frag->fr_subtype; | |
1120 | frag->fr_type = rs_fill; | |
1121 | frag->fr_var = 0; | |
1122 | frag->fr_offset = 0; | |
1123 | } | |
1124 | ||
1125 | /* Generate .debug_line content for the chain of line number entries | |
1126 | beginning at E, for segment SEG. */ | |
1127 | ||
1128 | static void | |
a2e22468 | 1129 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1130 | { |
1131 | unsigned filenum = 1; | |
1132 | unsigned line = 1; | |
1133 | unsigned column = 0; | |
bd0eb99b RH |
1134 | unsigned isa = 0; |
1135 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1136 | fragS *last_frag = NULL, *frag; |
1137 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1138 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1139 | struct line_entry *next; |
1140 | ||
fead5cd9 | 1141 | do |
fac0d250 | 1142 | { |
07a53e5c | 1143 | int line_delta; |
220e750f RH |
1144 | |
1145 | if (filenum != e->loc.filenum) | |
fac0d250 | 1146 | { |
220e750f RH |
1147 | filenum = e->loc.filenum; |
1148 | out_opcode (DW_LNS_set_file); | |
1149 | out_uleb128 (filenum); | |
220e750f RH |
1150 | } |
1151 | ||
1152 | if (column != e->loc.column) | |
1153 | { | |
1154 | column = e->loc.column; | |
1155 | out_opcode (DW_LNS_set_column); | |
1156 | out_uleb128 (column); | |
220e750f RH |
1157 | } |
1158 | ||
bd0eb99b RH |
1159 | if (isa != e->loc.isa) |
1160 | { | |
1161 | isa = e->loc.isa; | |
1162 | out_opcode (DW_LNS_set_isa); | |
1163 | out_uleb128 (isa); | |
bd0eb99b RH |
1164 | } |
1165 | ||
1166 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1167 | { |
1168 | flags = e->loc.flags; | |
1169 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1170 | } |
1171 | ||
bd0eb99b | 1172 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1173 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1174 | |
bd0eb99b | 1175 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1176 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1177 | |
1178 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1179 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1180 | |
fb81275c JM |
1181 | /* Don't try to optimize away redundant entries; gdb wants two |
1182 | entries for a function where the code starts on the same line as | |
1183 | the {, and there's no way to identify that case here. Trust gcc | |
1184 | to optimize appropriately. */ | |
07a53e5c RH |
1185 | line_delta = e->loc.line - line; |
1186 | lab = e->label; | |
1187 | frag = symbol_get_frag (lab); | |
1188 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1189 | |
07a53e5c | 1190 | if (last_frag == NULL) |
220e750f | 1191 | { |
07a53e5c RH |
1192 | out_set_addr (lab); |
1193 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1194 | } |
1737851b BW |
1195 | else if (DWARF2_USE_FIXED_ADVANCE_PC) |
1196 | out_fixed_inc_line_addr (line_delta, lab, last_lab); | |
07a53e5c RH |
1197 | else if (frag == last_frag) |
1198 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); | |
1199 | else | |
1200 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1201 | ||
1202 | line = e->loc.line; | |
1203 | last_lab = lab; | |
1204 | last_frag = frag; | |
1205 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1206 | |
1207 | next = e->next; | |
1208 | free (e); | |
1209 | e = next; | |
fac0d250 | 1210 | } |
fead5cd9 | 1211 | while (e); |
353e2c69 | 1212 | |
220e750f | 1213 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1214 | frag = last_frag_for_seg (seg); |
c9049d30 | 1215 | frag_ofs = get_frag_fix (frag, seg); |
1737851b BW |
1216 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1217 | { | |
1218 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1219 | out_fixed_inc_line_addr (INT_MAX, lab, last_lab); | |
1220 | } | |
1221 | else if (frag == last_frag) | |
07a53e5c | 1222 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1223 | else |
07a53e5c RH |
1224 | { |
1225 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1226 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1227 | } | |
fac0d250 RH |
1228 | } |
1229 | ||
220e750f RH |
1230 | /* Emit the directory and file tables for .debug_line. */ |
1231 | ||
fac0d250 | 1232 | static void |
a2e22468 | 1233 | out_file_list (void) |
fac0d250 RH |
1234 | { |
1235 | size_t size; | |
3d6b762c | 1236 | const char *dir; |
fac0d250 | 1237 | char *cp; |
220e750f RH |
1238 | unsigned int i; |
1239 | ||
a7ed1ca2 NC |
1240 | /* Emit directory list. */ |
1241 | for (i = 1; i < dirs_in_use; ++i) | |
1242 | { | |
3d6b762c JM |
1243 | dir = remap_debug_filename (dirs[i]); |
1244 | size = strlen (dir) + 1; | |
a7ed1ca2 | 1245 | cp = frag_more (size); |
3d6b762c | 1246 | memcpy (cp, dir, size); |
a7ed1ca2 NC |
1247 | } |
1248 | /* Terminate it. */ | |
220e750f | 1249 | out_byte ('\0'); |
fac0d250 | 1250 | |
220e750f | 1251 | for (i = 1; i < files_in_use; ++i) |
fac0d250 | 1252 | { |
249e3833 RH |
1253 | if (files[i].filename == NULL) |
1254 | { | |
0e389e77 | 1255 | as_bad (_("unassigned file number %ld"), (long) i); |
88b4ca40 RH |
1256 | /* Prevent a crash later, particularly for file 1. */ |
1257 | files[i].filename = ""; | |
249e3833 RH |
1258 | continue; |
1259 | } | |
1260 | ||
220e750f | 1261 | size = strlen (files[i].filename) + 1; |
fac0d250 | 1262 | cp = frag_more (size); |
220e750f | 1263 | memcpy (cp, files[i].filename, size); |
fac0d250 | 1264 | |
220e750f | 1265 | out_uleb128 (files[i].dir); /* directory number */ |
fac0d250 RH |
1266 | out_uleb128 (0); /* last modification timestamp */ |
1267 | out_uleb128 (0); /* filesize */ | |
1268 | } | |
353e2c69 KH |
1269 | |
1270 | /* Terminate filename list. */ | |
1271 | out_byte (0); | |
fac0d250 RH |
1272 | } |
1273 | ||
220e750f RH |
1274 | /* Emit the collected .debug_line data. */ |
1275 | ||
1276 | static void | |
a2e22468 | 1277 | out_debug_line (segT line_seg) |
220e750f RH |
1278 | { |
1279 | expressionS expr; | |
1280 | symbolS *line_start; | |
1281 | symbolS *prologue_end; | |
1282 | symbolS *line_end; | |
1283 | struct line_seg *s; | |
14e777e0 KB |
1284 | enum dwarf2_format d2f; |
1285 | int sizeof_offset; | |
220e750f RH |
1286 | |
1287 | subseg_set (line_seg, 0); | |
1288 | ||
b7d6ed97 RH |
1289 | line_start = symbol_temp_new_now (); |
1290 | prologue_end = symbol_temp_make (); | |
1291 | line_end = symbol_temp_make (); | |
220e750f RH |
1292 | |
1293 | /* Total length of the information for this compilation unit. */ | |
1294 | expr.X_op = O_subtract; | |
1295 | expr.X_add_symbol = line_end; | |
1296 | expr.X_op_symbol = line_start; | |
14e777e0 KB |
1297 | |
1298 | d2f = DWARF2_FORMAT (); | |
1299 | if (d2f == dwarf2_format_32bit) | |
1300 | { | |
1301 | expr.X_add_number = -4; | |
1302 | emit_expr (&expr, 4); | |
1303 | sizeof_offset = 4; | |
1304 | } | |
1305 | else if (d2f == dwarf2_format_64bit) | |
1306 | { | |
1307 | expr.X_add_number = -12; | |
1308 | out_four (-1); | |
1309 | emit_expr (&expr, 8); | |
1310 | sizeof_offset = 8; | |
1311 | } | |
1312 | else if (d2f == dwarf2_format_64bit_irix) | |
1313 | { | |
1314 | expr.X_add_number = -8; | |
1315 | emit_expr (&expr, 8); | |
1316 | sizeof_offset = 8; | |
1317 | } | |
1318 | else | |
1319 | { | |
1320 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1321 | } | |
220e750f RH |
1322 | |
1323 | /* Version. */ | |
1324 | out_two (2); | |
1325 | ||
1326 | /* Length of the prologue following this length. */ | |
1327 | expr.X_op = O_subtract; | |
1328 | expr.X_add_symbol = prologue_end; | |
1329 | expr.X_op_symbol = line_start; | |
1330 | expr.X_add_number = - (4 + 2 + 4); | |
14e777e0 | 1331 | emit_expr (&expr, sizeof_offset); |
220e750f RH |
1332 | |
1333 | /* Parameters of the state machine. */ | |
1334 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
1335 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); | |
1336 | out_byte (DWARF2_LINE_BASE); | |
1337 | out_byte (DWARF2_LINE_RANGE); | |
1338 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
1339 | ||
1340 | /* Standard opcode lengths. */ | |
1341 | out_byte (0); /* DW_LNS_copy */ | |
1342 | out_byte (1); /* DW_LNS_advance_pc */ | |
1343 | out_byte (1); /* DW_LNS_advance_line */ | |
1344 | out_byte (1); /* DW_LNS_set_file */ | |
1345 | out_byte (1); /* DW_LNS_set_column */ | |
1346 | out_byte (0); /* DW_LNS_negate_stmt */ | |
1347 | out_byte (0); /* DW_LNS_set_basic_block */ | |
1348 | out_byte (0); /* DW_LNS_const_add_pc */ | |
1349 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
1350 | out_byte (0); /* DW_LNS_set_prologue_end */ |
1351 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
1352 | out_byte (1); /* DW_LNS_set_isa */ | |
220e750f RH |
1353 | |
1354 | out_file_list (); | |
1355 | ||
b7d6ed97 | 1356 | symbol_set_value_now (prologue_end); |
220e750f RH |
1357 | |
1358 | /* For each section, emit a statement program. */ | |
ee515fb7 | 1359 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1360 | process_entries (s->seg, s->head->head); |
1361 | ||
b7d6ed97 | 1362 | symbol_set_value_now (line_end); |
220e750f RH |
1363 | } |
1364 | ||
802f5d9e NC |
1365 | static void |
1366 | out_debug_ranges (segT ranges_seg) | |
1367 | { | |
1368 | unsigned int addr_size = sizeof_address; | |
1369 | struct line_seg *s; | |
1370 | expressionS expr; | |
1371 | unsigned int i; | |
1372 | ||
1373 | subseg_set (ranges_seg, 0); | |
1374 | ||
1375 | /* Base Address Entry. */ | |
1376 | for (i = 0; i < addr_size; i++) | |
1377 | out_byte (0xff); | |
1378 | for (i = 0; i < addr_size; i++) | |
1379 | out_byte (0); | |
1380 | ||
1381 | /* Range List Entry. */ | |
1382 | for (s = all_segs; s; s = s->next) | |
1383 | { | |
1384 | fragS *frag; | |
1385 | symbolS *beg, *end; | |
1386 | ||
1387 | frag = first_frag_for_seg (s->seg); | |
1388 | beg = symbol_temp_new (s->seg, 0, frag); | |
1389 | s->text_start = beg; | |
1390 | ||
1391 | frag = last_frag_for_seg (s->seg); | |
1392 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
1393 | s->text_end = end; | |
1394 | ||
1395 | expr.X_op = O_symbol; | |
1396 | expr.X_add_symbol = beg; | |
1397 | expr.X_add_number = 0; | |
1398 | emit_expr (&expr, addr_size); | |
1399 | ||
1400 | expr.X_op = O_symbol; | |
1401 | expr.X_add_symbol = end; | |
1402 | expr.X_add_number = 0; | |
1403 | emit_expr (&expr, addr_size); | |
1404 | } | |
1405 | ||
1406 | /* End of Range Entry. */ | |
1407 | for (i = 0; i < addr_size; i++) | |
1408 | out_byte (0); | |
1409 | for (i = 0; i < addr_size; i++) | |
1410 | out_byte (0); | |
1411 | } | |
1412 | ||
220e750f RH |
1413 | /* Emit data for .debug_aranges. */ |
1414 | ||
58b5739a | 1415 | static void |
a2e22468 | 1416 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 1417 | { |
220e750f RH |
1418 | unsigned int addr_size = sizeof_address; |
1419 | addressT size, skip; | |
1420 | struct line_seg *s; | |
1421 | expressionS expr; | |
1422 | char *p; | |
fac0d250 | 1423 | |
220e750f | 1424 | size = 4 + 2 + 4 + 1 + 1; |
fac0d250 | 1425 | |
ee515fb7 KH |
1426 | skip = 2 * addr_size - (size & (2 * addr_size - 1)); |
1427 | if (skip == 2 * addr_size) | |
220e750f RH |
1428 | skip = 0; |
1429 | size += skip; | |
fac0d250 | 1430 | |
ee515fb7 KH |
1431 | for (s = all_segs; s; s = s->next) |
1432 | size += 2 * addr_size; | |
fac0d250 | 1433 | |
ee515fb7 | 1434 | size += 2 * addr_size; |
fac0d250 | 1435 | |
220e750f | 1436 | subseg_set (aranges_seg, 0); |
fac0d250 | 1437 | |
220e750f RH |
1438 | /* Length of the compilation unit. */ |
1439 | out_four (size - 4); | |
fac0d250 | 1440 | |
220e750f RH |
1441 | /* Version. */ |
1442 | out_two (2); | |
4dc7ead9 | 1443 | |
220e750f | 1444 | /* Offset to .debug_info. */ |
6174d9c8 RH |
1445 | /* ??? sizeof_offset */ |
1446 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4); | |
220e750f RH |
1447 | |
1448 | /* Size of an address (offset portion). */ | |
1449 | out_byte (addr_size); | |
1450 | ||
1451 | /* Size of a segment descriptor. */ | |
1452 | out_byte (0); | |
1453 | ||
1454 | /* Align the header. */ | |
1455 | if (skip) | |
ee515fb7 | 1456 | frag_align (ffs (2 * addr_size) - 1, 0, 0); |
4dc7ead9 | 1457 | |
ee515fb7 | 1458 | for (s = all_segs; s; s = s->next) |
220e750f RH |
1459 | { |
1460 | fragS *frag; | |
1461 | symbolS *beg, *end; | |
1462 | ||
1463 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 1464 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
1465 | s->text_start = beg; |
1466 | ||
1467 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 1468 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
1469 | s->text_end = end; |
1470 | ||
1471 | expr.X_op = O_symbol; | |
1472 | expr.X_add_symbol = beg; | |
1473 | expr.X_add_number = 0; | |
1474 | emit_expr (&expr, addr_size); | |
1475 | ||
1476 | expr.X_op = O_subtract; | |
1477 | expr.X_add_symbol = end; | |
1478 | expr.X_op_symbol = beg; | |
1479 | expr.X_add_number = 0; | |
1480 | emit_expr (&expr, addr_size); | |
1481 | } | |
4dc7ead9 | 1482 | |
220e750f RH |
1483 | p = frag_more (2 * addr_size); |
1484 | md_number_to_chars (p, 0, addr_size); | |
1485 | md_number_to_chars (p + addr_size, 0, addr_size); | |
4dc7ead9 RH |
1486 | } |
1487 | ||
220e750f RH |
1488 | /* Emit data for .debug_abbrev. Note that this must be kept in |
1489 | sync with out_debug_info below. */ | |
fac0d250 | 1490 | |
220e750f | 1491 | static void |
a2e22468 | 1492 | out_debug_abbrev (segT abbrev_seg) |
220e750f RH |
1493 | { |
1494 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 1495 | |
220e750f RH |
1496 | out_uleb128 (1); |
1497 | out_uleb128 (DW_TAG_compile_unit); | |
1498 | out_byte (DW_CHILDREN_no); | |
1499 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
1500 | if (all_segs->next == NULL) | |
4dc7ead9 | 1501 | { |
220e750f RH |
1502 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
1503 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
1504 | } | |
802f5d9e NC |
1505 | else |
1506 | { | |
1507 | if (DWARF2_FORMAT () == dwarf2_format_32bit) | |
1508 | out_abbrev (DW_AT_ranges, DW_FORM_data4); | |
1509 | else | |
1510 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
1511 | } | |
48b91938 | 1512 | out_abbrev (DW_AT_name, DW_FORM_string); |
220e750f RH |
1513 | out_abbrev (DW_AT_comp_dir, DW_FORM_string); |
1514 | out_abbrev (DW_AT_producer, DW_FORM_string); | |
1515 | out_abbrev (DW_AT_language, DW_FORM_data2); | |
1516 | out_abbrev (0, 0); | |
a987bfc9 RH |
1517 | |
1518 | /* Terminate the abbreviations for this compilation unit. */ | |
1519 | out_byte (0); | |
220e750f | 1520 | } |
4dc7ead9 | 1521 | |
220e750f | 1522 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 1523 | |
220e750f | 1524 | static void |
802f5d9e | 1525 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg) |
220e750f RH |
1526 | { |
1527 | char producer[128]; | |
3d6b762c JM |
1528 | const char *comp_dir; |
1529 | const char *dirname; | |
220e750f RH |
1530 | expressionS expr; |
1531 | symbolS *info_start; | |
1532 | symbolS *info_end; | |
1533 | char *p; | |
1534 | int len; | |
14e777e0 KB |
1535 | enum dwarf2_format d2f; |
1536 | int sizeof_offset; | |
4dc7ead9 | 1537 | |
220e750f | 1538 | subseg_set (info_seg, 0); |
4dc7ead9 | 1539 | |
b7d6ed97 RH |
1540 | info_start = symbol_temp_new_now (); |
1541 | info_end = symbol_temp_make (); | |
4dc7ead9 | 1542 | |
220e750f RH |
1543 | /* Compilation Unit length. */ |
1544 | expr.X_op = O_subtract; | |
1545 | expr.X_add_symbol = info_end; | |
1546 | expr.X_op_symbol = info_start; | |
14e777e0 KB |
1547 | |
1548 | d2f = DWARF2_FORMAT (); | |
1549 | if (d2f == dwarf2_format_32bit) | |
1550 | { | |
1551 | expr.X_add_number = -4; | |
1552 | emit_expr (&expr, 4); | |
1553 | sizeof_offset = 4; | |
1554 | } | |
1555 | else if (d2f == dwarf2_format_64bit) | |
1556 | { | |
1557 | expr.X_add_number = -12; | |
1558 | out_four (-1); | |
1559 | emit_expr (&expr, 8); | |
1560 | sizeof_offset = 8; | |
1561 | } | |
1562 | else if (d2f == dwarf2_format_64bit_irix) | |
1563 | { | |
1564 | expr.X_add_number = -8; | |
1565 | emit_expr (&expr, 8); | |
1566 | sizeof_offset = 8; | |
1567 | } | |
1568 | else | |
1569 | { | |
1570 | as_fatal (_("internal error: unknown dwarf2 format")); | |
1571 | } | |
4dc7ead9 | 1572 | |
220e750f RH |
1573 | /* DWARF version. */ |
1574 | out_two (2); | |
4dc7ead9 | 1575 | |
220e750f | 1576 | /* .debug_abbrev offset */ |
6174d9c8 | 1577 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 1578 | |
220e750f RH |
1579 | /* Target address size. */ |
1580 | out_byte (sizeof_address); | |
fac0d250 | 1581 | |
220e750f RH |
1582 | /* DW_TAG_compile_unit DIE abbrev */ |
1583 | out_uleb128 (1); | |
fac0d250 | 1584 | |
220e750f | 1585 | /* DW_AT_stmt_list */ |
6174d9c8 RH |
1586 | /* ??? sizeof_offset */ |
1587 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4); | |
fac0d250 | 1588 | |
802f5d9e | 1589 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 1590 | if (all_segs->next == NULL) |
58b5739a | 1591 | { |
220e750f RH |
1592 | /* DW_AT_low_pc */ |
1593 | expr.X_op = O_symbol; | |
1594 | expr.X_add_symbol = all_segs->text_start; | |
1595 | expr.X_add_number = 0; | |
1596 | emit_expr (&expr, sizeof_address); | |
1597 | ||
1598 | /* DW_AT_high_pc */ | |
1599 | expr.X_op = O_symbol; | |
1600 | expr.X_add_symbol = all_segs->text_end; | |
1601 | expr.X_add_number = 0; | |
1602 | emit_expr (&expr, sizeof_address); | |
58b5739a | 1603 | } |
802f5d9e NC |
1604 | else |
1605 | { | |
eb1fe072 NC |
1606 | /* This attribute is emitted if the code is disjoint. */ |
1607 | /* DW_AT_ranges. */ | |
1608 | TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset); | |
802f5d9e | 1609 | } |
58b5739a | 1610 | |
48b91938 RH |
1611 | /* DW_AT_name. We don't have the actual file name that was present |
1612 | on the command line, so assume files[1] is the main input file. | |
1613 | We're not supposed to get called unless at least one line number | |
1614 | entry was emitted, so this should always be defined. */ | |
1615 | if (!files || files_in_use < 1) | |
1616 | abort (); | |
a7ed1ca2 NC |
1617 | if (files[1].dir) |
1618 | { | |
3d6b762c JM |
1619 | dirname = remap_debug_filename (dirs[files[1].dir]); |
1620 | len = strlen (dirname); | |
a7ed1ca2 | 1621 | p = frag_more (len + 1); |
3d6b762c | 1622 | memcpy (p, dirname, len); |
56487c55 | 1623 | INSERT_DIR_SEPARATOR (p, len); |
a7ed1ca2 | 1624 | } |
48b91938 RH |
1625 | len = strlen (files[1].filename) + 1; |
1626 | p = frag_more (len); | |
1627 | memcpy (p, files[1].filename, len); | |
1628 | ||
220e750f | 1629 | /* DW_AT_comp_dir */ |
3d6b762c | 1630 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
1631 | len = strlen (comp_dir) + 1; |
1632 | p = frag_more (len); | |
1633 | memcpy (p, comp_dir, len); | |
fac0d250 | 1634 | |
220e750f RH |
1635 | /* DW_AT_producer */ |
1636 | sprintf (producer, "GNU AS %s", VERSION); | |
1637 | len = strlen (producer) + 1; | |
1638 | p = frag_more (len); | |
1639 | memcpy (p, producer, len); | |
fac0d250 | 1640 | |
220e750f RH |
1641 | /* DW_AT_language. Yes, this is probably not really MIPS, but the |
1642 | dwarf2 draft has no standard code for assembler. */ | |
1643 | out_two (DW_LANG_Mips_Assembler); | |
1644 | ||
b7d6ed97 | 1645 | symbol_set_value_now (info_end); |
fac0d250 RH |
1646 | } |
1647 | ||
c6cb92c5 NS |
1648 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
1649 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
1650 | file has a non-empty .debug_info section. If we emit .debug_line, | |
1651 | and the .debug_info section is empty, we also emit .debug_info, | |
1652 | .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if | |
1653 | there were any .file/.loc directives, or --gdwarf2 was given and | |
1654 | there were any located instructions emitted. */ | |
1655 | ||
fac0d250 | 1656 | void |
a2e22468 | 1657 | dwarf2_finish (void) |
fac0d250 | 1658 | { |
220e750f RH |
1659 | segT line_seg; |
1660 | struct line_seg *s; | |
c6cb92c5 NS |
1661 | segT info_seg; |
1662 | int emit_other_sections = 0; | |
1663 | ||
1664 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
1665 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 1666 | |
c6cb92c5 NS |
1667 | if (!all_segs && emit_other_sections) |
1668 | /* There is no line information and no non-empty .debug_info | |
1669 | section. */ | |
220e750f | 1670 | return; |
fac0d250 | 1671 | |
220e750f | 1672 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 1673 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 1674 | |
220e750f RH |
1675 | /* Create and switch to the line number section. */ |
1676 | line_seg = subseg_new (".debug_line", 0); | |
8a7140c3 | 1677 | bfd_set_section_flags (stdoutput, line_seg, SEC_READONLY | SEC_DEBUGGING); |
fac0d250 | 1678 | |
220e750f | 1679 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 1680 | for (s = all_segs; s; s = s->next) |
fac0d250 | 1681 | { |
220e750f RH |
1682 | struct line_subseg *ss = s->head; |
1683 | struct line_entry **ptail = ss->ptail; | |
1684 | ||
1685 | while ((ss = ss->next) != NULL) | |
1686 | { | |
1687 | *ptail = ss->head; | |
1688 | ptail = ss->ptail; | |
1689 | } | |
fac0d250 | 1690 | } |
85a39694 | 1691 | |
220e750f | 1692 | out_debug_line (line_seg); |
85a39694 | 1693 | |
c6cb92c5 NS |
1694 | /* If this is assembler generated line info, and there is no |
1695 | debug_info already, we need .debug_info and .debug_abbrev | |
1696 | sections as well. */ | |
1697 | if (emit_other_sections) | |
220e750f RH |
1698 | { |
1699 | segT abbrev_seg; | |
220e750f | 1700 | segT aranges_seg; |
802f5d9e | 1701 | segT ranges_seg; |
4dc7ead9 | 1702 | |
c6cb92c5 NS |
1703 | assert (all_segs); |
1704 | ||
220e750f RH |
1705 | info_seg = subseg_new (".debug_info", 0); |
1706 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
1707 | aranges_seg = subseg_new (".debug_aranges", 0); | |
ef99799a | 1708 | |
8a7140c3 NC |
1709 | bfd_set_section_flags (stdoutput, info_seg, |
1710 | SEC_READONLY | SEC_DEBUGGING); | |
1711 | bfd_set_section_flags (stdoutput, abbrev_seg, | |
1712 | SEC_READONLY | SEC_DEBUGGING); | |
1713 | bfd_set_section_flags (stdoutput, aranges_seg, | |
1714 | SEC_READONLY | SEC_DEBUGGING); | |
ef99799a | 1715 | |
ee515fb7 | 1716 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 1717 | |
802f5d9e NC |
1718 | if (all_segs->next == NULL) |
1719 | ranges_seg = NULL; | |
1720 | else | |
1721 | { | |
1722 | ranges_seg = subseg_new (".debug_ranges", 0); | |
1723 | bfd_set_section_flags (stdoutput, ranges_seg, | |
1724 | SEC_READONLY | SEC_DEBUGGING); | |
1725 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
1726 | out_debug_ranges (ranges_seg); | |
1727 | } | |
1728 | ||
220e750f RH |
1729 | out_debug_aranges (aranges_seg, info_seg); |
1730 | out_debug_abbrev (abbrev_seg); | |
802f5d9e | 1731 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg); |
220e750f | 1732 | } |
85a39694 | 1733 | } |