Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
b3adc24a | 2 | Copyright (C) 1999-2020 Free Software Foundation, Inc. |
fac0d250 RH |
3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
fac0d250 RH |
10 | any later version. |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
fac0d250 | 21 | |
89b66cde | 22 | /* Logical line numbers can be controlled by the compiler via the |
bd0eb99b | 23 | following directives: |
fac0d250 RH |
24 | |
25 | .file FILENO "file.c" | |
ecea7679 | 26 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
92846e72 CC |
27 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] \ |
28 | [discriminator 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 \ | |
7fd3924a AM |
60 | && string[0] != 0 \ |
61 | && string[1] == ':') \ | |
56487c55 NC |
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 |
413a266c | 72 | # define DWARF2_FORMAT(SEC) 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 | ||
01e1a5bc NC |
79 | #ifndef DWARF2_FILE_NAME |
80 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
81 | #endif | |
82 | ||
83 | #ifndef DWARF2_FILE_TIME_NAME | |
5496f3c6 | 84 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
85 | #endif |
86 | ||
87 | #ifndef DWARF2_FILE_SIZE_NAME | |
5496f3c6 | 88 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
89 | #endif |
90 | ||
fc0eebac | 91 | #ifndef DWARF2_VERSION |
31bf1864 | 92 | #define DWARF2_VERSION dwarf_level |
fc0eebac TG |
93 | #endif |
94 | ||
88ebb0a1 MW |
95 | /* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */ |
96 | #ifndef DWARF2_ARANGES_VERSION | |
97 | #define DWARF2_ARANGES_VERSION 2 | |
98 | #endif | |
99 | ||
8acbe8ff | 100 | /* This implementation outputs version 3 .debug_line information. */ |
88ebb0a1 | 101 | #ifndef DWARF2_LINE_VERSION |
5496f3c6 | 102 | #define DWARF2_LINE_VERSION (dwarf_level > 3 ? dwarf_level : 3) |
88ebb0a1 MW |
103 | #endif |
104 | ||
bdd3b953 MW |
105 | /* The .debug_rnglists has only been in DWARF version 5. */ |
106 | #ifndef DWARF2_RNGLISTS_VERSION | |
107 | #define DWARF2_RNGLISTS_VERSION 5 | |
108 | #endif | |
109 | ||
fac0d250 RH |
110 | #include "subsegs.h" |
111 | ||
fa8f86ff | 112 | #include "dwarf2.h" |
fac0d250 | 113 | |
fac0d250 RH |
114 | /* Since we can't generate the prolog until the body is complete, we |
115 | use three different subsegments for .debug_line: one holding the | |
116 | prolog, one for the directory and filename info, and one for the | |
117 | body ("statement program"). */ | |
118 | #define DL_PROLOG 0 | |
119 | #define DL_FILES 1 | |
120 | #define DL_BODY 2 | |
121 | ||
1737851b BW |
122 | /* If linker relaxation might change offsets in the code, the DWARF special |
123 | opcodes and variable-length operands cannot be used. If this macro is | |
124 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
125 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
453dc3f0 | 126 | # define DWARF2_USE_FIXED_ADVANCE_PC linkrelax |
1737851b BW |
127 | #endif |
128 | ||
33eaf5de | 129 | /* First special line opcode - leave room for the standard opcodes. |
fac0d250 RH |
130 | Note: If you want to change this, you'll have to update the |
131 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
132 | out_debug_line(). */ |
133 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
134 | |
135 | #ifndef DWARF2_LINE_BASE | |
136 | /* Minimum line offset in a special line info. opcode. This value | |
137 | was chosen to give a reasonable range of values. */ | |
138 | # define DWARF2_LINE_BASE -5 | |
139 | #endif | |
140 | ||
141 | /* Range of line offsets in a special line info. opcode. */ | |
142 | #ifndef DWARF2_LINE_RANGE | |
143 | # define DWARF2_LINE_RANGE 14 | |
144 | #endif | |
145 | ||
146 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
147 | /* Define the architecture-dependent minimum instruction length (in | |
148 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 149 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
150 | #endif |
151 | ||
bd0eb99b | 152 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
153 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
154 | ||
5496f3c6 NC |
155 | #ifndef DWARF2_LINE_MAX_OPS_PER_INSN |
156 | #define DWARF2_LINE_MAX_OPS_PER_INSN 1 | |
157 | #endif | |
158 | ||
cb30237e | 159 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
160 | #define SPECIAL_LINE(op) \ |
161 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
162 | ||
163 | /* Given a special op, return the address skip amount (in units of | |
164 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
165 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
166 | ||
cb30237e | 167 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
168 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
169 | ||
62ebcb5c AM |
170 | #ifndef TC_PARSE_CONS_RETURN_NONE |
171 | #define TC_PARSE_CONS_RETURN_NONE BFD_RELOC_NONE | |
172 | #endif | |
173 | ||
ba8826a8 AO |
174 | struct line_entry |
175 | { | |
220e750f | 176 | struct line_entry *next; |
07a53e5c | 177 | symbolS *label; |
220e750f | 178 | struct dwarf2_line_info loc; |
e6c774b4 | 179 | }; |
fac0d250 | 180 | |
ba8826a8 AO |
181 | /* Don't change the offset of next in line_entry. set_or_check_view |
182 | calls in dwarf2_gen_line_info_1 depend on it. */ | |
183 | static char unused[offsetof(struct line_entry, next) ? -1 : 1] | |
184 | ATTRIBUTE_UNUSED; | |
185 | ||
186 | struct line_subseg | |
187 | { | |
220e750f RH |
188 | struct line_subseg *next; |
189 | subsegT subseg; | |
190 | struct line_entry *head; | |
191 | struct line_entry **ptail; | |
e410add4 | 192 | struct line_entry **pmove_tail; |
220e750f | 193 | }; |
353e2c69 | 194 | |
ba8826a8 AO |
195 | struct line_seg |
196 | { | |
220e750f RH |
197 | struct line_seg *next; |
198 | segT seg; | |
199 | struct line_subseg *head; | |
200 | symbolS *text_start; | |
201 | symbolS *text_end; | |
202 | }; | |
203 | ||
204 | /* Collects data for all line table entries during assembly. */ | |
205 | static struct line_seg *all_segs; | |
1e9cc1c2 | 206 | static struct line_seg **last_seg_ptr; |
220e750f | 207 | |
5496f3c6 NC |
208 | #define NUM_MD5_BYTES 16 |
209 | ||
ba8826a8 AO |
210 | struct file_entry |
211 | { | |
5496f3c6 NC |
212 | const char * filename; |
213 | unsigned int dir; | |
714e6c96 | 214 | bfd_boolean auto_assigned; |
5496f3c6 | 215 | unsigned char md5[NUM_MD5_BYTES]; |
220e750f RH |
216 | }; |
217 | ||
218 | /* Table of files used by .debug_line. */ | |
219 | static struct file_entry *files; | |
220 | static unsigned int files_in_use; | |
221 | static unsigned int files_allocated; | |
222 | ||
a7ed1ca2 | 223 | /* Table of directories used by .debug_line. */ |
5496f3c6 NC |
224 | static char ** dirs = NULL; |
225 | static unsigned int dirs_in_use = 0; | |
226 | static unsigned int dirs_allocated = 0; | |
a7ed1ca2 | 227 | |
b34976b6 | 228 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
edc7a80a MW |
229 | doing work when there's nothing to do. Will be reset by |
230 | dwarf2_consume_line_info. */ | |
1eee4adc | 231 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 232 | |
edc7a80a MW |
233 | /* TRUE when we've seen any .loc directive at any time during parsing. |
234 | Indicates the user wants us to generate a .debug_line section. | |
235 | Used in dwarf2_finish as sanity check. */ | |
236 | static bfd_boolean dwarf2_any_loc_directive_seen; | |
237 | ||
07a53e5c RH |
238 | /* TRUE when we're supposed to set the basic block mark whenever a |
239 | label is seen. */ | |
240 | bfd_boolean dwarf2_loc_mark_labels; | |
241 | ||
220e750f | 242 | /* Current location as indicated by the most recent .loc directive. */ |
ba8826a8 AO |
243 | static struct dwarf2_line_info current = |
244 | { | |
bd0eb99b | 245 | 1, 1, 0, 0, |
92846e72 | 246 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
ba8826a8 | 247 | 0, NULL |
bd0eb99b | 248 | }; |
220e750f | 249 | |
ba8826a8 AO |
250 | /* This symbol is used to recognize view number forced resets in loc |
251 | lists. */ | |
252 | static symbolS *force_reset_view; | |
253 | ||
254 | /* This symbol evaluates to an expression that, if nonzero, indicates | |
255 | some view assert check failed. */ | |
256 | static symbolS *view_assert_failed; | |
257 | ||
220e750f RH |
258 | /* The size of an address on the target. */ |
259 | static unsigned int sizeof_address; | |
260 | \f | |
c5c0a210 | 261 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 262 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 263 | |
6174d9c8 RH |
264 | /* Create an offset to .dwarf2_*. */ |
265 | ||
266 | static void | |
a2e22468 | 267 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 268 | { |
91d6fa6a | 269 | expressionS exp; |
6174d9c8 | 270 | |
031e3350 | 271 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
272 | exp.X_op = O_symbol; |
273 | exp.X_add_symbol = symbol; | |
274 | exp.X_add_number = 0; | |
275 | emit_expr (&exp, size); | |
6174d9c8 | 276 | } |
c5c0a210 | 277 | #endif |
6174d9c8 | 278 | |
e410add4 | 279 | /* Find or create (if CREATE_P) an entry for SEG+SUBSEG in ALL_SEGS. */ |
220e750f RH |
280 | |
281 | static struct line_subseg * | |
e410add4 | 282 | get_line_subseg (segT seg, subsegT subseg, bfd_boolean create_p) |
220e750f | 283 | { |
5f3fd8b4 | 284 | struct line_seg *s = seg_info (seg)->dwarf2_line_seg; |
91d6fa6a | 285 | struct line_subseg **pss, *lss; |
fac0d250 | 286 | |
1e9cc1c2 NC |
287 | if (s == NULL) |
288 | { | |
e410add4 RS |
289 | if (!create_p) |
290 | return NULL; | |
291 | ||
325801bd | 292 | s = XNEW (struct line_seg); |
1e9cc1c2 NC |
293 | s->next = NULL; |
294 | s->seg = seg; | |
295 | s->head = NULL; | |
296 | *last_seg_ptr = s; | |
297 | last_seg_ptr = &s->next; | |
5f3fd8b4 | 298 | seg_info (seg)->dwarf2_line_seg = s; |
1e9cc1c2 | 299 | } |
5496f3c6 | 300 | |
1e9cc1c2 | 301 | gas_assert (seg == s->seg); |
220e750f | 302 | |
91d6fa6a | 303 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 304 | { |
91d6fa6a | 305 | if (lss->subseg == subseg) |
ee515fb7 | 306 | goto found_subseg; |
91d6fa6a | 307 | if (lss->subseg > subseg) |
220e750f | 308 | break; |
fac0d250 | 309 | } |
220e750f | 310 | |
325801bd | 311 | lss = XNEW (struct line_subseg); |
91d6fa6a NC |
312 | lss->next = *pss; |
313 | lss->subseg = subseg; | |
314 | lss->head = NULL; | |
315 | lss->ptail = &lss->head; | |
e410add4 | 316 | lss->pmove_tail = &lss->head; |
91d6fa6a | 317 | *pss = lss; |
220e750f RH |
318 | |
319 | found_subseg: | |
91d6fa6a | 320 | return lss; |
fac0d250 RH |
321 | } |
322 | ||
ba8826a8 AO |
323 | /* (Un)reverse the line_entry list starting from H. */ |
324 | ||
325 | static struct line_entry * | |
326 | reverse_line_entry_list (struct line_entry *h) | |
327 | { | |
328 | struct line_entry *p = NULL, *e, *n; | |
329 | ||
330 | for (e = h; e; e = n) | |
331 | { | |
332 | n = e->next; | |
333 | e->next = p; | |
334 | p = e; | |
335 | } | |
336 | return p; | |
337 | } | |
338 | ||
339 | /* Compute the view for E based on the previous entry P. If we | |
340 | introduce an (undefined) view symbol for P, and H is given (P must | |
341 | be the tail in this case), introduce view symbols for earlier list | |
342 | entries as well, until one of them is constant. */ | |
343 | ||
344 | static void | |
345 | set_or_check_view (struct line_entry *e, struct line_entry *p, | |
346 | struct line_entry *h) | |
347 | { | |
348 | expressionS viewx; | |
349 | ||
350 | memset (&viewx, 0, sizeof (viewx)); | |
351 | viewx.X_unsigned = 1; | |
352 | ||
353 | /* First, compute !(E->label > P->label), to tell whether or not | |
354 | we're to reset the view number. If we can't resolve it to a | |
355 | constant, keep it symbolic. */ | |
356 | if (!p || (e->loc.view == force_reset_view && force_reset_view)) | |
357 | { | |
358 | viewx.X_op = O_constant; | |
359 | viewx.X_add_number = 0; | |
360 | viewx.X_add_symbol = NULL; | |
361 | viewx.X_op_symbol = NULL; | |
362 | } | |
363 | else | |
364 | { | |
365 | viewx.X_op = O_gt; | |
366 | viewx.X_add_number = 0; | |
367 | viewx.X_add_symbol = e->label; | |
368 | viewx.X_op_symbol = p->label; | |
369 | resolve_expression (&viewx); | |
370 | if (viewx.X_op == O_constant) | |
371 | viewx.X_add_number = !viewx.X_add_number; | |
372 | else | |
373 | { | |
374 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
375 | viewx.X_add_number = 0; | |
376 | viewx.X_op_symbol = NULL; | |
377 | viewx.X_op = O_logical_not; | |
378 | } | |
379 | } | |
380 | ||
381 | if (S_IS_DEFINED (e->loc.view) && symbol_constant_p (e->loc.view)) | |
382 | { | |
383 | expressionS *value = symbol_get_value_expression (e->loc.view); | |
384 | /* We can't compare the view numbers at this point, because in | |
385 | VIEWX we've only determined whether we're to reset it so | |
386 | far. */ | |
387 | if (viewx.X_op == O_constant) | |
388 | { | |
389 | if (!value->X_add_number != !viewx.X_add_number) | |
390 | as_bad (_("view number mismatch")); | |
391 | } | |
392 | /* Record the expression to check it later. It is the result of | |
393 | a logical not, thus 0 or 1. We just add up all such deferred | |
394 | expressions, and resolve it at the end. */ | |
395 | else if (!value->X_add_number) | |
396 | { | |
397 | symbolS *deferred = make_expr_symbol (&viewx); | |
398 | if (view_assert_failed) | |
399 | { | |
400 | expressionS chk; | |
031e3350 | 401 | |
ba8826a8 AO |
402 | memset (&chk, 0, sizeof (chk)); |
403 | chk.X_unsigned = 1; | |
404 | chk.X_op = O_add; | |
405 | chk.X_add_number = 0; | |
406 | chk.X_add_symbol = view_assert_failed; | |
407 | chk.X_op_symbol = deferred; | |
408 | deferred = make_expr_symbol (&chk); | |
409 | } | |
410 | view_assert_failed = deferred; | |
411 | } | |
412 | } | |
413 | ||
414 | if (viewx.X_op != O_constant || viewx.X_add_number) | |
415 | { | |
416 | expressionS incv; | |
417 | ||
418 | if (!p->loc.view) | |
419 | { | |
420 | p->loc.view = symbol_temp_make (); | |
421 | gas_assert (!S_IS_DEFINED (p->loc.view)); | |
422 | } | |
423 | ||
424 | memset (&incv, 0, sizeof (incv)); | |
425 | incv.X_unsigned = 1; | |
426 | incv.X_op = O_symbol; | |
427 | incv.X_add_symbol = p->loc.view; | |
428 | incv.X_add_number = 1; | |
429 | ||
430 | if (viewx.X_op == O_constant) | |
431 | { | |
432 | gas_assert (viewx.X_add_number == 1); | |
433 | viewx = incv; | |
434 | } | |
435 | else | |
436 | { | |
437 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
438 | viewx.X_add_number = 0; | |
439 | viewx.X_op_symbol = make_expr_symbol (&incv); | |
440 | viewx.X_op = O_multiply; | |
441 | } | |
442 | } | |
443 | ||
444 | if (!S_IS_DEFINED (e->loc.view)) | |
445 | { | |
446 | symbol_set_value_expression (e->loc.view, &viewx); | |
38cf168b | 447 | S_SET_SEGMENT (e->loc.view, expr_section); |
ba8826a8 AO |
448 | symbol_set_frag (e->loc.view, &zero_address_frag); |
449 | } | |
450 | ||
451 | /* Define and attempt to simplify any earlier views needed to | |
452 | compute E's. */ | |
453 | if (h && p && p->loc.view && !S_IS_DEFINED (p->loc.view)) | |
454 | { | |
455 | struct line_entry *h2; | |
456 | /* Reverse the list to avoid quadratic behavior going backwards | |
457 | in a single-linked list. */ | |
458 | struct line_entry *r = reverse_line_entry_list (h); | |
459 | ||
460 | gas_assert (r == p); | |
461 | /* Set or check views until we find a defined or absent view. */ | |
462 | do | |
62e6b7b3 AO |
463 | { |
464 | /* Do not define the head of a (sub?)segment view while | |
465 | handling others. It would be defined too early, without | |
466 | regard to the last view of other subsegments. | |
467 | set_or_check_view will be called for every head segment | |
468 | that needs it. */ | |
469 | if (r == h) | |
470 | break; | |
471 | set_or_check_view (r, r->next, NULL); | |
472 | } | |
ba8826a8 AO |
473 | while (r->next && r->next->loc.view && !S_IS_DEFINED (r->next->loc.view) |
474 | && (r = r->next)); | |
475 | ||
476 | /* Unreverse the list, so that we can go forward again. */ | |
477 | h2 = reverse_line_entry_list (p); | |
478 | gas_assert (h2 == h); | |
479 | ||
480 | /* Starting from the last view we just defined, attempt to | |
481 | simplify the view expressions, until we do so to P. */ | |
482 | do | |
483 | { | |
62e6b7b3 AO |
484 | /* The head view of a subsegment may remain undefined while |
485 | handling other elements, before it is linked to the last | |
486 | view of the previous subsegment. */ | |
487 | if (r == h) | |
488 | continue; | |
ba8826a8 AO |
489 | gas_assert (S_IS_DEFINED (r->loc.view)); |
490 | resolve_expression (symbol_get_value_expression (r->loc.view)); | |
491 | } | |
492 | while (r != p && (r = r->next)); | |
493 | ||
494 | /* Now that we've defined and computed all earlier views that might | |
495 | be needed to compute E's, attempt to simplify it. */ | |
496 | resolve_expression (symbol_get_value_expression (e->loc.view)); | |
497 | } | |
498 | } | |
499 | ||
6a50d470 | 500 | /* Record an entry for LOC occurring at LABEL. */ |
07a53e5c RH |
501 | |
502 | static void | |
6a50d470 | 503 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) |
07a53e5c | 504 | { |
6a50d470 | 505 | struct line_subseg *lss; |
07a53e5c RH |
506 | struct line_entry *e; |
507 | ||
325801bd | 508 | e = XNEW (struct line_entry); |
07a53e5c | 509 | e->next = NULL; |
6a50d470 | 510 | e->label = label; |
07a53e5c RH |
511 | e->loc = *loc; |
512 | ||
e410add4 | 513 | lss = get_line_subseg (now_seg, now_subseg, TRUE); |
ba8826a8 | 514 | |
62e6b7b3 AO |
515 | /* Subseg heads are chained to previous subsegs in |
516 | dwarf2_finish. */ | |
517 | if (loc->view && lss->head) | |
ba8826a8 | 518 | set_or_check_view (e, |
62e6b7b3 | 519 | (struct line_entry *)lss->ptail, |
ba8826a8 AO |
520 | lss->head); |
521 | ||
6a50d470 RS |
522 | *lss->ptail = e; |
523 | lss->ptail = &e->next; | |
07a53e5c RH |
524 | } |
525 | ||
436d9e46 | 526 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 527 | |
220e750f | 528 | void |
a2e22468 | 529 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 530 | { |
1ea5c325 MS |
531 | static unsigned int line = -1; |
532 | static unsigned int filenum = -1; | |
220e750f | 533 | |
6a50d470 RS |
534 | symbolS *sym; |
535 | ||
220e750f | 536 | /* Early out for as-yet incomplete location information. */ |
5496f3c6 NC |
537 | if (loc->line == 0) |
538 | return; | |
539 | if (loc->filenum == 0 && DWARF2_LINE_VERSION < 5) | |
220e750f RH |
540 | return; |
541 | ||
ffa554ed GK |
542 | /* Don't emit sequences of line symbols for the same line when the |
543 | symbols apply to assembler code. It is necessary to emit | |
544 | duplicate line symbols when a compiler asks for them, because GDB | |
545 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 546 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 547 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
548 | return; |
549 | ||
550 | line = loc->line; | |
551 | filenum = loc->filenum; | |
552 | ||
453dc3f0 NC |
553 | if (linkrelax) |
554 | { | |
555 | char name[120]; | |
556 | ||
557 | /* Use a non-fake name for the line number location, | |
558 | so that it can be referred to by relocations. */ | |
559 | sprintf (name, ".Loc.%u.%u", line, filenum); | |
e01e1cee | 560 | sym = symbol_new (name, now_seg, frag_now, ofs); |
453dc3f0 NC |
561 | } |
562 | else | |
e01e1cee | 563 | sym = symbol_temp_new (now_seg, frag_now, ofs); |
6a50d470 | 564 | dwarf2_gen_line_info_1 (sym, loc); |
220e750f | 565 | } |
fac0d250 | 566 | |
5496f3c6 NC |
567 | static const char * |
568 | get_basename (const char * pathname) | |
569 | { | |
570 | const char * file; | |
571 | ||
572 | file = lbasename (pathname); | |
573 | /* Don't make empty string from / or A: from A:/ . */ | |
574 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
575 | if (file <= pathname + 3) | |
576 | file = pathname; | |
577 | #else | |
578 | if (file == pathname + 1) | |
579 | file = pathname; | |
580 | #endif | |
581 | return file; | |
582 | } | |
583 | ||
584 | static unsigned int | |
585 | get_directory_table_entry (const char * dirname, | |
586 | size_t dirlen, | |
587 | bfd_boolean can_use_zero) | |
588 | { | |
589 | unsigned int d; | |
590 | ||
591 | if (dirlen == 0) | |
592 | return 0; | |
593 | ||
594 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR | |
595 | if (IS_DIR_SEPARATOR (dirname[dirlen - 1])) | |
596 | { | |
597 | -- dirlen; | |
598 | if (dirlen == 0) | |
599 | return 0; | |
600 | } | |
601 | #endif | |
602 | ||
603 | for (d = 0; d < dirs_in_use; ++d) | |
604 | { | |
605 | if (dirs[d] != NULL | |
606 | && filename_ncmp (dirname, dirs[d], dirlen) == 0 | |
607 | && dirs[d][dirlen] == '\0') | |
608 | return d; | |
609 | } | |
610 | ||
611 | if (can_use_zero) | |
612 | { | |
613 | if (dirs == NULL || dirs[0] == NULL) | |
614 | d = 0; | |
615 | } | |
616 | else if (d == 0) | |
617 | d = 1; | |
618 | ||
619 | if (d >= dirs_allocated) | |
620 | { | |
621 | unsigned int old = dirs_allocated; | |
622 | ||
623 | dirs_allocated = d + 32; | |
624 | dirs = XRESIZEVEC (char *, dirs, dirs_allocated); | |
625 | memset (dirs + old, 0, (dirs_allocated - old) * sizeof (char *)); | |
626 | } | |
627 | ||
628 | dirs[d] = xmemdup0 (dirname, dirlen); | |
629 | if (dirs_in_use <= d) | |
630 | dirs_in_use = d + 1; | |
631 | ||
632 | return d; | |
633 | } | |
634 | ||
714e6c96 NC |
635 | static bfd_boolean |
636 | assign_file_to_slot (unsigned long i, const char *file, unsigned int dir, bfd_boolean auto_assign) | |
637 | { | |
638 | if (i >= files_allocated) | |
639 | { | |
640 | unsigned int old = files_allocated; | |
641 | ||
642 | files_allocated = i + 32; | |
643 | /* Catch wraparound. */ | |
644 | if (files_allocated <= old) | |
645 | { | |
646 | as_bad (_("file number %lu is too big"), (unsigned long) i); | |
647 | return FALSE; | |
648 | } | |
649 | ||
650 | files = XRESIZEVEC (struct file_entry, files, files_allocated); | |
651 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
652 | } | |
653 | ||
654 | files[i].filename = file; | |
655 | files[i].dir = dir; | |
656 | files[i].auto_assigned = auto_assign; | |
657 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
658 | ||
659 | if (files_in_use < i + 1) | |
660 | files_in_use = i + 1; | |
661 | ||
662 | return TRUE; | |
663 | } | |
664 | ||
5496f3c6 NC |
665 | /* Get a .debug_line file number for PATHNAME. If there is a |
666 | directory component to PATHNAME, then this will be stored | |
667 | in the directory table, if it is not already present. | |
668 | Returns the slot number allocated to that filename or -1 | |
669 | if there was a problem. */ | |
670 | ||
671 | static signed int | |
672 | allocate_filenum (const char * pathname) | |
673 | { | |
674 | static signed int last_used = -1, last_used_dir_len = 0; | |
675 | const char *file; | |
676 | size_t dir_len; | |
677 | unsigned int i, dir; | |
678 | ||
679 | /* Short circuit the common case of adding the same pathname | |
680 | as last time. */ | |
681 | if (last_used != -1) | |
682 | { | |
683 | const char * dirname = NULL; | |
684 | ||
685 | if (dirs != NULL) | |
686 | dirname = dirs[files[last_used].dir]; | |
687 | ||
688 | if (dirname == NULL) | |
689 | { | |
690 | if (filename_cmp (pathname, files[last_used].filename) == 0) | |
691 | return last_used; | |
692 | } | |
693 | else | |
694 | { | |
695 | if (filename_ncmp (pathname, dirname, last_used_dir_len) == 0 | |
696 | && IS_DIR_SEPARATOR (pathname [last_used_dir_len]) | |
697 | && filename_cmp (pathname + last_used_dir_len + 1, | |
698 | files[last_used].filename) == 0) | |
699 | return last_used; | |
700 | } | |
701 | } | |
702 | ||
703 | file = get_basename (pathname); | |
704 | dir_len = file - pathname; | |
705 | ||
706 | dir = get_directory_table_entry (pathname, dir_len, FALSE); | |
707 | ||
714e6c96 | 708 | /* Do not use slot-0. That is specifically reserved for use by |
5496f3c6 NC |
709 | the '.file 0 "name"' directive. */ |
710 | for (i = 1; i < files_in_use; ++i) | |
711 | if (files[i].dir == dir | |
712 | && files[i].filename | |
713 | && filename_cmp (file, files[i].filename) == 0) | |
714 | { | |
715 | last_used = i; | |
716 | last_used_dir_len = dir_len; | |
717 | return i; | |
718 | } | |
719 | ||
714e6c96 NC |
720 | if (!assign_file_to_slot (i, file, dir, TRUE)) |
721 | return -1; | |
5496f3c6 | 722 | |
5496f3c6 NC |
723 | last_used = i; |
724 | last_used_dir_len = dir_len; | |
725 | ||
726 | return i; | |
727 | } | |
728 | ||
729 | /* Allocate slot NUM in the .debug_line file table to FILENAME. | |
730 | If DIRNAME is not NULL or there is a directory component to FILENAME | |
731 | then this will be stored in the directory table, if not already present. | |
732 | if WITH_MD5 is TRUE then there is a md5 value in generic_bignum. | |
733 | Returns TRUE if allocation succeeded, FALSE otherwise. */ | |
734 | ||
735 | static bfd_boolean | |
736 | allocate_filename_to_slot (const char * dirname, | |
737 | const char * filename, | |
738 | unsigned int num, | |
739 | bfd_boolean with_md5) | |
740 | { | |
741 | const char *file; | |
742 | size_t dirlen; | |
743 | unsigned int i, d; | |
744 | ||
745 | /* Short circuit the common case of adding the same pathname | |
746 | as last time. */ | |
747 | if (num < files_allocated && files[num].filename != NULL) | |
748 | { | |
749 | const char * dir = NULL; | |
750 | ||
751 | if (dirs) | |
752 | dir = dirs[files[num].dir]; | |
753 | ||
754 | if (with_md5 | |
755 | && memcmp (generic_bignum, files[num].md5, NUM_MD5_BYTES) != 0) | |
756 | goto fail; | |
757 | ||
758 | if (dirname != NULL) | |
759 | { | |
760 | if (dir != NULL && filename_cmp (dir, dirname) != 0) | |
761 | goto fail; | |
762 | ||
763 | if (filename_cmp (filename, files[num].filename) != 0) | |
764 | goto fail; | |
765 | ||
766 | /* If the filenames match, but the directory table entry was | |
767 | empty, then fill it with the provided directory name. */ | |
768 | if (dir == NULL) | |
769 | dirs[files[num].dir] = xmemdup0 (dirname, strlen (dirname)); | |
770 | ||
771 | return TRUE; | |
772 | } | |
773 | else if (dir != NULL) | |
774 | { | |
775 | dirlen = strlen (dir); | |
776 | if (filename_ncmp (filename, dir, dirlen) == 0 | |
777 | && IS_DIR_SEPARATOR (filename [dirlen]) | |
778 | && filename_cmp (filename + dirlen + 1, files[num].filename) == 0) | |
779 | return TRUE; | |
780 | } | |
781 | else /* dir == NULL */ | |
782 | { | |
783 | file = get_basename (filename); | |
784 | if (filename_cmp (file, files[num].filename) == 0) | |
785 | { | |
786 | if (file > filename) | |
787 | /* The filenames match, but the directory table entry is empty. | |
788 | Fill it with the provided directory name. */ | |
789 | dirs[files[num].dir] = xmemdup0 (filename, file - filename); | |
790 | return TRUE; | |
791 | } | |
792 | } | |
793 | ||
794 | fail: | |
714e6c96 NC |
795 | /* If NUM was previously allocated automatically then |
796 | choose another slot for it, so that we can reuse NUM. */ | |
797 | if (files[num].auto_assigned) | |
798 | { | |
799 | /* Find an unused slot. */ | |
800 | for (i = 1; i < files_in_use; ++i) | |
801 | if (files[i].filename == NULL) | |
802 | break; | |
803 | if (! assign_file_to_slot (i, files[num].filename, files[num].dir, TRUE)) | |
804 | return FALSE; | |
805 | files[num].filename = NULL; | |
806 | } | |
807 | else | |
808 | { | |
809 | as_bad (_("file table slot %u is already occupied by a different file (%s%s%s vs %s%s%s)"), | |
810 | num, | |
811 | dir == NULL ? "" : dir, | |
812 | dir == NULL ? "" : "/", | |
813 | files[num].filename, | |
814 | dirname == NULL ? "" : dirname, | |
815 | dirname == NULL ? "" : "/", | |
816 | filename); | |
817 | return FALSE; | |
818 | } | |
5496f3c6 NC |
819 | } |
820 | ||
821 | if (dirname == NULL) | |
822 | { | |
823 | dirname = filename; | |
824 | file = get_basename (filename); | |
825 | dirlen = file - filename; | |
826 | } | |
827 | else | |
828 | { | |
829 | dirlen = strlen (dirname); | |
830 | file = filename; | |
831 | } | |
832 | ||
833 | d = get_directory_table_entry (dirname, dirlen, num == 0); | |
834 | i = num; | |
835 | ||
714e6c96 NC |
836 | if (! assign_file_to_slot (i, file, d, FALSE)) |
837 | return FALSE; | |
5496f3c6 | 838 | |
5496f3c6 NC |
839 | if (with_md5) |
840 | { | |
841 | if (target_big_endian) | |
842 | { | |
843 | /* md5's are stored in litte endian format. */ | |
844 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
845 | unsigned int byte = NUM_MD5_BYTES; | |
846 | unsigned int bignum_index = 0; | |
847 | ||
848 | while (bits_remaining) | |
849 | { | |
850 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
851 | valueT bignum_value = generic_bignum [bignum_index]; | |
852 | bignum_index ++; | |
853 | ||
854 | while (bignum_bits_remaining) | |
855 | { | |
856 | files[i].md5[--byte] = bignum_value & 0xff; | |
857 | bignum_value >>= 8; | |
858 | bignum_bits_remaining -= 8; | |
859 | bits_remaining -= 8; | |
860 | } | |
861 | } | |
862 | } | |
863 | else | |
864 | { | |
865 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
866 | unsigned int byte = 0; | |
867 | unsigned int bignum_index = 0; | |
868 | ||
869 | while (bits_remaining) | |
870 | { | |
871 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
872 | valueT bignum_value = generic_bignum [bignum_index]; | |
873 | ||
874 | bignum_index ++; | |
875 | ||
876 | while (bignum_bits_remaining) | |
877 | { | |
878 | files[i].md5[byte++] = bignum_value & 0xff; | |
879 | bignum_value >>= 8; | |
880 | bignum_bits_remaining -= 8; | |
881 | bits_remaining -= 8; | |
882 | } | |
883 | } | |
884 | } | |
885 | } | |
886 | else | |
887 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
888 | ||
5496f3c6 NC |
889 | return TRUE; |
890 | } | |
891 | ||
ecea7679 RH |
892 | /* Returns the current source information. If .file directives have |
893 | been encountered, the info for the corresponding source file is | |
894 | returned. Otherwise, the info for the assembly source file is | |
895 | returned. */ | |
896 | ||
220e750f | 897 | void |
a2e22468 | 898 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
899 | { |
900 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 901 | { |
ba8826a8 AO |
902 | const char *filename; |
903 | ||
904 | memset (line, 0, sizeof (*line)); | |
905 | filename = as_where (&line->line); | |
5496f3c6 NC |
906 | line->filenum = allocate_filenum (filename); |
907 | /* FIXME: We should check the return value from allocate_filenum. */ | |
220e750f | 908 | line->column = 0; |
bd0eb99b | 909 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 910 | line->isa = current.isa; |
92846e72 | 911 | line->discriminator = current.discriminator; |
ba8826a8 | 912 | line->view = NULL; |
fac0d250 | 913 | } |
220e750f RH |
914 | else |
915 | *line = current; | |
fac0d250 RH |
916 | } |
917 | ||
7fd3924a | 918 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
919 | machine of isa changes when assembler debug info is enabled. */ |
920 | ||
921 | void | |
922 | dwarf2_set_isa (unsigned int isa) | |
923 | { | |
924 | current.isa = isa; | |
925 | } | |
926 | ||
220e750f RH |
927 | /* Called for each machine instruction, or relatively atomic group of |
928 | machine instructions (ie built-in macro). The instruction or group | |
929 | is SIZE bytes in length. If dwarf2 line number generation is called | |
930 | for, emit a line statement appropriately. */ | |
353e2c69 | 931 | |
220e750f | 932 | void |
a2e22468 | 933 | dwarf2_emit_insn (int size) |
fac0d250 | 934 | { |
220e750f | 935 | struct dwarf2_line_info loc; |
fac0d250 | 936 | |
ba8826a8 AO |
937 | if (debug_type != DEBUG_DWARF2 |
938 | ? !dwarf2_loc_directive_seen | |
939 | : !seen_at_least_1_file ()) | |
220e750f | 940 | return; |
7fd3924a AM |
941 | |
942 | dwarf2_where (&loc); | |
b6675117 | 943 | |
71250b94 | 944 | dwarf2_gen_line_info ((frag_now_fix_octets () - size) / OCTETS_PER_BYTE, &loc); |
661ba50f BW |
945 | dwarf2_consume_line_info (); |
946 | } | |
947 | ||
e410add4 RS |
948 | /* Move all previously-emitted line entries for the current position by |
949 | DELTA bytes. This function cannot be used to move the same entries | |
950 | twice. */ | |
951 | ||
952 | void | |
953 | dwarf2_move_insn (int delta) | |
954 | { | |
955 | struct line_subseg *lss; | |
956 | struct line_entry *e; | |
957 | valueT now; | |
958 | ||
959 | if (delta == 0) | |
960 | return; | |
961 | ||
962 | lss = get_line_subseg (now_seg, now_subseg, FALSE); | |
963 | if (!lss) | |
964 | return; | |
965 | ||
966 | now = frag_now_fix (); | |
967 | while ((e = *lss->pmove_tail)) | |
968 | { | |
969 | if (S_GET_VALUE (e->label) == now) | |
970 | S_SET_VALUE (e->label, now + delta); | |
971 | lss->pmove_tail = &e->next; | |
972 | } | |
973 | } | |
974 | ||
661ba50f BW |
975 | /* Called after the current line information has been either used with |
976 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
977 | This resets the state of the line number information to reflect that | |
978 | it has been used. */ | |
979 | ||
980 | void | |
981 | dwarf2_consume_line_info (void) | |
982 | { | |
983 | /* Unless we generate DWARF2 debugging information for each | |
984 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 985 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
986 | |
987 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
988 | | DWARF2_FLAG_PROLOGUE_END | |
989 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 990 | current.discriminator = 0; |
3a00b02d | 991 | current.view = NULL; |
220e750f | 992 | } |
fac0d250 | 993 | |
07a53e5c RH |
994 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
995 | is enabled, emit a basic block marker. */ | |
996 | ||
997 | void | |
998 | dwarf2_emit_label (symbolS *label) | |
999 | { | |
1000 | struct dwarf2_line_info loc; | |
1001 | ||
1002 | if (!dwarf2_loc_mark_labels) | |
1003 | return; | |
1004 | if (S_GET_SEGMENT (label) != now_seg) | |
1005 | return; | |
fd361982 | 1006 | if (!(bfd_section_flags (now_seg) & SEC_CODE)) |
07a53e5c | 1007 | return; |
7fd3924a AM |
1008 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
1009 | return; | |
1010 | ||
1011 | dwarf2_where (&loc); | |
07a53e5c RH |
1012 | |
1013 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1014 | ||
6a50d470 | 1015 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 1016 | dwarf2_consume_line_info (); |
07a53e5c RH |
1017 | } |
1018 | ||
ecb4347a DJ |
1019 | /* Handle two forms of .file directive: |
1020 | - Pass .file "source.c" to s_app_file | |
1021 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 1022 | |
68d20676 | 1023 | If an entry is added to the file table, return a pointer to the filename. */ |
ecb4347a DJ |
1024 | |
1025 | char * | |
68d20676 | 1026 | dwarf2_directive_filename (void) |
220e750f | 1027 | { |
b0b3ea7e | 1028 | bfd_boolean with_md5 = FALSE; |
8f02ae5b | 1029 | valueT num; |
e46d99eb | 1030 | char *filename; |
5496f3c6 | 1031 | const char * dirname = NULL; |
220e750f RH |
1032 | int filename_len; |
1033 | ||
1034 | /* Continue to accept a bare string and pass it off. */ | |
1035 | SKIP_WHITESPACE (); | |
1036 | if (*input_line_pointer == '"') | |
fac0d250 | 1037 | { |
220e750f | 1038 | s_app_file (0); |
ecb4347a | 1039 | return NULL; |
fac0d250 RH |
1040 | } |
1041 | ||
220e750f | 1042 | num = get_absolute_expression (); |
220e750f | 1043 | |
5496f3c6 | 1044 | if ((offsetT) num < 1 && DWARF2_LINE_VERSION < 5) |
fac0d250 | 1045 | { |
0e389e77 | 1046 | as_bad (_("file number less than one")); |
84d9ab33 | 1047 | ignore_rest_of_line (); |
ecb4347a | 1048 | return NULL; |
fac0d250 RH |
1049 | } |
1050 | ||
5496f3c6 NC |
1051 | /* FIXME: Should we allow ".file <N>\n" as an expression meaning |
1052 | "switch back to the already allocated file <N> as the current | |
1053 | file" ? */ | |
84d9ab33 NC |
1054 | |
1055 | filename = demand_copy_C_string (&filename_len); | |
1056 | if (filename == NULL) | |
1057 | /* demand_copy_C_string will have already generated an error message. */ | |
1058 | return NULL; | |
1059 | ||
5496f3c6 NC |
1060 | /* For DWARF-5 support we also accept: |
1061 | .file <NUM> ["<dir>"] "<file>" [md5 <NUM>] */ | |
1062 | if (DWARF2_LINE_VERSION > 4) | |
1063 | { | |
1064 | SKIP_WHITESPACE (); | |
1065 | if (*input_line_pointer == '"') | |
1066 | { | |
1067 | dirname = filename; | |
1068 | filename = demand_copy_C_string (&filename_len); | |
1069 | SKIP_WHITESPACE (); | |
1070 | } | |
1071 | ||
1072 | if (strncmp (input_line_pointer, "md5", 3) == 0) | |
1073 | { | |
1074 | input_line_pointer += 3; | |
1075 | SKIP_WHITESPACE (); | |
1076 | ||
1077 | expressionS exp; | |
1078 | expression_and_evaluate (& exp); | |
1079 | if (exp.X_op != O_big) | |
1080 | as_bad (_("md5 value too small or not a constant")); | |
1081 | else | |
1082 | with_md5 = TRUE; | |
1083 | } | |
1084 | } | |
1085 | ||
84d9ab33 NC |
1086 | demand_empty_rest_of_line (); |
1087 | ||
7cadeb2c AM |
1088 | /* A .file directive implies compiler generated debug information is |
1089 | being supplied. Turn off gas generated debug info. */ | |
1090 | debug_type = DEBUG_NONE; | |
1091 | ||
8f02ae5b AM |
1092 | if (num != (unsigned int) num |
1093 | || num >= (size_t) -1 / sizeof (struct file_entry) - 32) | |
220e750f | 1094 | { |
8f02ae5b | 1095 | as_bad (_("file number %lu is too big"), (unsigned long) num); |
ecb4347a | 1096 | return NULL; |
249e3833 | 1097 | } |
220e750f | 1098 | |
5496f3c6 NC |
1099 | if (! allocate_filename_to_slot (dirname, filename, (unsigned int) num, |
1100 | with_md5)) | |
1101 | return NULL; | |
ecb4347a DJ |
1102 | |
1103 | return filename; | |
fac0d250 RH |
1104 | } |
1105 | ||
68d20676 NC |
1106 | /* Calls dwarf2_directive_filename, but discards its result. |
1107 | Used in pseudo-op tables where the function result is ignored. */ | |
1108 | ||
1109 | void | |
1110 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) | |
1111 | { | |
1112 | (void) dwarf2_directive_filename (); | |
1113 | } | |
1114 | ||
220e750f | 1115 | void |
a2e22468 | 1116 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 1117 | { |
ecea7679 RH |
1118 | offsetT filenum, line; |
1119 | ||
851feff8 DJ |
1120 | /* If we see two .loc directives in a row, force the first one to be |
1121 | output now. */ | |
7cadeb2c | 1122 | if (dwarf2_loc_directive_seen) |
6a50d470 | 1123 | dwarf2_emit_insn (0); |
851feff8 | 1124 | |
ecea7679 RH |
1125 | filenum = get_absolute_expression (); |
1126 | SKIP_WHITESPACE (); | |
1127 | line = get_absolute_expression (); | |
1128 | ||
1129 | if (filenum < 1) | |
1130 | { | |
5496f3c6 NC |
1131 | if (filenum != 0 || DWARF2_LINE_VERSION < 5) |
1132 | { | |
1133 | as_bad (_("file number less than one")); | |
1134 | return; | |
1135 | } | |
ecea7679 | 1136 | } |
5496f3c6 NC |
1137 | |
1138 | if (filenum >= (int) files_in_use || files[filenum].filename == NULL) | |
ecea7679 RH |
1139 | { |
1140 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
1141 | return; | |
1142 | } | |
1143 | ||
1144 | current.filenum = filenum; | |
1145 | current.line = line; | |
92846e72 | 1146 | current.discriminator = 0; |
ecea7679 RH |
1147 | |
1148 | #ifndef NO_LISTING | |
1149 | if (listing) | |
1150 | { | |
1151 | if (files[filenum].dir) | |
1152 | { | |
1153 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
1154 | size_t file_len = strlen (files[filenum].filename); | |
add39d23 | 1155 | char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1); |
ecea7679 RH |
1156 | |
1157 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 1158 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
1159 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
1160 | cp[dir_len + file_len + 1] = '\0'; | |
1161 | listing_source_file (cp); | |
e1fa0163 | 1162 | free (cp); |
ecea7679 RH |
1163 | } |
1164 | else | |
1165 | listing_source_file (files[filenum].filename); | |
1166 | listing_source_line (line); | |
1167 | } | |
1168 | #endif | |
1169 | ||
220e750f | 1170 | SKIP_WHITESPACE (); |
ecea7679 RH |
1171 | if (ISDIGIT (*input_line_pointer)) |
1172 | { | |
1173 | current.column = get_absolute_expression (); | |
1174 | SKIP_WHITESPACE (); | |
1175 | } | |
1176 | ||
1177 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 1178 | { |
bd0eb99b RH |
1179 | char *p, c; |
1180 | offsetT value; | |
1181 | ||
d02603dc | 1182 | c = get_symbol_name (& p); |
bd0eb99b RH |
1183 | |
1184 | if (strcmp (p, "basic_block") == 0) | |
1185 | { | |
1186 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1187 | *input_line_pointer = c; | |
1188 | } | |
1189 | else if (strcmp (p, "prologue_end") == 0) | |
1190 | { | |
1191 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
1192 | *input_line_pointer = c; | |
1193 | } | |
1194 | else if (strcmp (p, "epilogue_begin") == 0) | |
1195 | { | |
1196 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
1197 | *input_line_pointer = c; | |
1198 | } | |
1199 | else if (strcmp (p, "is_stmt") == 0) | |
1200 | { | |
d02603dc | 1201 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1202 | value = get_absolute_expression (); |
1203 | if (value == 0) | |
1204 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
1205 | else if (value == 1) | |
1206 | current.flags |= DWARF2_FLAG_IS_STMT; | |
1207 | else | |
ecea7679 RH |
1208 | { |
1209 | as_bad (_("is_stmt value not 0 or 1")); | |
1210 | return; | |
1211 | } | |
bd0eb99b RH |
1212 | } |
1213 | else if (strcmp (p, "isa") == 0) | |
1214 | { | |
d02603dc | 1215 | (void) restore_line_pointer (c); |
bd0eb99b | 1216 | value = get_absolute_expression (); |
ecea7679 | 1217 | if (value >= 0) |
bd0eb99b | 1218 | current.isa = value; |
ecea7679 RH |
1219 | else |
1220 | { | |
1221 | as_bad (_("isa number less than zero")); | |
1222 | return; | |
1223 | } | |
bd0eb99b | 1224 | } |
92846e72 CC |
1225 | else if (strcmp (p, "discriminator") == 0) |
1226 | { | |
d02603dc | 1227 | (void) restore_line_pointer (c); |
92846e72 CC |
1228 | value = get_absolute_expression (); |
1229 | if (value >= 0) | |
1230 | current.discriminator = value; | |
1231 | else | |
1232 | { | |
1233 | as_bad (_("discriminator less than zero")); | |
1234 | return; | |
1235 | } | |
1236 | } | |
ba8826a8 AO |
1237 | else if (strcmp (p, "view") == 0) |
1238 | { | |
1239 | symbolS *sym; | |
1240 | ||
1241 | (void) restore_line_pointer (c); | |
1242 | SKIP_WHITESPACE (); | |
1243 | ||
1244 | if (ISDIGIT (*input_line_pointer) | |
1245 | || *input_line_pointer == '-') | |
1246 | { | |
1247 | bfd_boolean force_reset = *input_line_pointer == '-'; | |
1248 | ||
1249 | value = get_absolute_expression (); | |
1250 | if (value != 0) | |
1251 | { | |
1252 | as_bad (_("numeric view can only be asserted to zero")); | |
1253 | return; | |
1254 | } | |
1255 | if (force_reset && force_reset_view) | |
1256 | sym = force_reset_view; | |
1257 | else | |
1258 | { | |
e01e1cee AM |
1259 | sym = symbol_temp_new (absolute_section, &zero_address_frag, |
1260 | value); | |
ba8826a8 AO |
1261 | if (force_reset) |
1262 | force_reset_view = sym; | |
1263 | } | |
1264 | } | |
1265 | else | |
1266 | { | |
1267 | char *name = read_symbol_name (); | |
1268 | ||
1269 | if (!name) | |
1270 | return; | |
1271 | sym = symbol_find_or_make (name); | |
38cf168b | 1272 | if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) |
ba8826a8 | 1273 | { |
38cf168b | 1274 | if (S_IS_VOLATILE (sym)) |
ba8826a8 | 1275 | sym = symbol_clone (sym, 1); |
38cf168b AM |
1276 | else if (!S_CAN_BE_REDEFINED (sym)) |
1277 | { | |
1278 | as_bad (_("symbol `%s' is already defined"), name); | |
1279 | return; | |
1280 | } | |
ba8826a8 | 1281 | } |
38cf168b AM |
1282 | S_SET_SEGMENT (sym, undefined_section); |
1283 | S_SET_VALUE (sym, 0); | |
1284 | symbol_set_frag (sym, &zero_address_frag); | |
ba8826a8 AO |
1285 | } |
1286 | current.view = sym; | |
1287 | } | |
bd0eb99b RH |
1288 | else |
1289 | { | |
ecea7679 | 1290 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
d02603dc | 1291 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1292 | return; |
1293 | } | |
1294 | ||
d02603dc | 1295 | SKIP_WHITESPACE_AFTER_NAME (); |
bd0eb99b RH |
1296 | } |
1297 | ||
1298 | demand_empty_rest_of_line (); | |
edc7a80a | 1299 | dwarf2_any_loc_directive_seen = dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 1300 | debug_type = DEBUG_NONE; |
ba8826a8 AO |
1301 | |
1302 | /* If we were given a view id, emit the row right away. */ | |
1303 | if (current.view) | |
1304 | dwarf2_emit_insn (0); | |
220e750f | 1305 | } |
07a53e5c RH |
1306 | |
1307 | void | |
1308 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
1309 | { | |
1310 | offsetT value = get_absolute_expression (); | |
1311 | ||
1312 | if (value != 0 && value != 1) | |
1313 | { | |
1314 | as_bad (_("expected 0 or 1")); | |
1315 | ignore_rest_of_line (); | |
1316 | } | |
1317 | else | |
1318 | { | |
1319 | dwarf2_loc_mark_labels = value != 0; | |
1320 | demand_empty_rest_of_line (); | |
1321 | } | |
1322 | } | |
220e750f RH |
1323 | \f |
1324 | static struct frag * | |
a2e22468 | 1325 | first_frag_for_seg (segT seg) |
220e750f | 1326 | { |
c9049d30 | 1327 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
1328 | } |
1329 | ||
1330 | static struct frag * | |
a2e22468 | 1331 | last_frag_for_seg (segT seg) |
220e750f | 1332 | { |
c9049d30 | 1333 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 1334 | |
c9049d30 AM |
1335 | while (f->frch_next != NULL) |
1336 | f = f->frch_next; | |
220e750f | 1337 | |
c9049d30 | 1338 | return f->frch_last; |
220e750f RH |
1339 | } |
1340 | \f | |
1341 | /* Emit a single byte into the current segment. */ | |
1342 | ||
1343 | static inline void | |
a2e22468 | 1344 | out_byte (int byte) |
220e750f RH |
1345 | { |
1346 | FRAG_APPEND_1_CHAR (byte); | |
1347 | } | |
1348 | ||
1349 | /* Emit a statement program opcode into the current segment. */ | |
1350 | ||
1351 | static inline void | |
a2e22468 | 1352 | out_opcode (int opc) |
220e750f RH |
1353 | { |
1354 | out_byte (opc); | |
1355 | } | |
1356 | ||
1357 | /* Emit a two-byte word into the current segment. */ | |
1358 | ||
1359 | static inline void | |
a2e22468 | 1360 | out_two (int data) |
220e750f RH |
1361 | { |
1362 | md_number_to_chars (frag_more (2), data, 2); | |
1363 | } | |
1364 | ||
1365 | /* Emit a four byte word into the current segment. */ | |
1366 | ||
1367 | static inline void | |
a2e22468 | 1368 | out_four (int data) |
220e750f RH |
1369 | { |
1370 | md_number_to_chars (frag_more (4), data, 4); | |
1371 | } | |
1372 | ||
1373 | /* Emit an unsigned "little-endian base 128" number. */ | |
1374 | ||
fac0d250 | 1375 | static void |
a2e22468 | 1376 | out_uleb128 (addressT value) |
220e750f RH |
1377 | { |
1378 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
1379 | } | |
1380 | ||
92846e72 CC |
1381 | /* Emit a signed "little-endian base 128" number. */ |
1382 | ||
1383 | static void | |
1384 | out_leb128 (addressT value) | |
1385 | { | |
1386 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
1387 | } | |
1388 | ||
220e750f RH |
1389 | /* Emit a tuple for .debug_abbrev. */ |
1390 | ||
1391 | static inline void | |
a2e22468 | 1392 | out_abbrev (int name, int form) |
fac0d250 | 1393 | { |
220e750f RH |
1394 | out_uleb128 (name); |
1395 | out_uleb128 (form); | |
1396 | } | |
fac0d250 | 1397 | |
220e750f | 1398 | /* Get the size of a fragment. */ |
fac0d250 | 1399 | |
220e750f | 1400 | static offsetT |
c9049d30 | 1401 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
1402 | { |
1403 | frchainS *fr; | |
1404 | ||
1405 | if (frag->fr_next) | |
1406 | return frag->fr_fix; | |
1407 | ||
1408 | /* If a fragment is the last in the chain, special measures must be | |
1409 | taken to find its size before relaxation, since it may be pending | |
1410 | on some subsegment chain. */ | |
c9049d30 | 1411 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 1412 | if (fr->frch_last == frag) |
c5c0a210 | 1413 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
1414 | |
1415 | abort (); | |
1416 | } | |
fac0d250 | 1417 | |
220e750f | 1418 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 1419 | |
220e750f | 1420 | static void |
07a53e5c | 1421 | out_set_addr (symbolS *sym) |
220e750f | 1422 | { |
91d6fa6a | 1423 | expressionS exp; |
9e3af0e7 | 1424 | |
031e3350 | 1425 | memset (&exp, 0, sizeof exp); |
e2b9a97e CE |
1426 | out_opcode (DW_LNS_extended_op); |
1427 | out_uleb128 (sizeof_address + 1); | |
fac0d250 | 1428 | |
e2b9a97e | 1429 | out_opcode (DW_LNE_set_address); |
91d6fa6a NC |
1430 | exp.X_op = O_symbol; |
1431 | exp.X_add_symbol = sym; | |
1432 | exp.X_add_number = 0; | |
1433 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
1434 | } |
1435 | ||
a2e22468 | 1436 | static void scale_addr_delta (addressT *); |
c8970b4b | 1437 | |
a3b75434 | 1438 | static void |
d7342424 | 1439 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
1440 | { |
1441 | static int printed_this = 0; | |
8fbf7334 | 1442 | if (DWARF2_LINE_MIN_INSN_LENGTH > 1) |
a3b75434 | 1443 | { |
8fbf7334 | 1444 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this) |
8f02ae5b | 1445 | { |
8fbf7334 | 1446 | as_bad("unaligned opcodes detected in executable segment"); |
8f02ae5b AM |
1447 | printed_this = 1; |
1448 | } | |
8fbf7334 | 1449 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; |
a3b75434 | 1450 | } |
a3b75434 | 1451 | } |
a3b75434 | 1452 | |
220e750f RH |
1453 | /* Encode a pair of line and address skips as efficiently as possible. |
1454 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 1455 | |
220e750f RH |
1456 | The following two routines *must* be kept in sync. This is |
1457 | enforced by making emit_inc_line_addr abort if we do not emit | |
1458 | exactly the expected number of bytes. */ | |
1459 | ||
1460 | static int | |
a2e22468 | 1461 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 1462 | { |
220e750f RH |
1463 | unsigned int tmp, opcode; |
1464 | int len = 0; | |
fac0d250 | 1465 | |
220e750f | 1466 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 1467 | scale_addr_delta (&addr_delta); |
220e750f RH |
1468 | |
1469 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
1470 | We cannot use special opcodes here, since we want the end_sequence | |
1471 | to emit the matrix entry. */ | |
1472 | if (line_delta == INT_MAX) | |
fac0d250 | 1473 | { |
220e750f RH |
1474 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1475 | len = 1; | |
62e6b7b3 | 1476 | else if (addr_delta) |
220e750f RH |
1477 | len = 1 + sizeof_leb128 (addr_delta, 0); |
1478 | return len + 3; | |
fac0d250 | 1479 | } |
fac0d250 | 1480 | |
220e750f RH |
1481 | /* Bias the line delta by the base. */ |
1482 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 1483 | |
220e750f RH |
1484 | /* If the line increment is out of range of a special opcode, we |
1485 | must encode it with DW_LNS_advance_line. */ | |
1486 | if (tmp >= DWARF2_LINE_RANGE) | |
1487 | { | |
1488 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1489 | line_delta = 0; | |
1490 | tmp = 0 - DWARF2_LINE_BASE; | |
1491 | } | |
fac0d250 | 1492 | |
220e750f RH |
1493 | /* Bias the opcode by the special opcode base. */ |
1494 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 1495 | |
220e750f RH |
1496 | /* Avoid overflow when addr_delta is large. */ |
1497 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
1498 | { | |
1499 | /* Try using a special opcode. */ | |
1500 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1501 | if (opcode <= 255) | |
1502 | return len + 1; | |
1503 | ||
1504 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1505 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1506 | if (opcode <= 255) | |
1507 | return len + 2; | |
1508 | } | |
1509 | ||
1510 | /* Otherwise use DW_LNS_advance_pc. */ | |
1511 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
1512 | ||
1513 | /* DW_LNS_copy or special opcode. */ | |
1514 | len += 1; | |
1515 | ||
1516 | return len; | |
1517 | } | |
fac0d250 | 1518 | |
220e750f | 1519 | static void |
a2e22468 | 1520 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
1521 | { |
1522 | unsigned int tmp, opcode; | |
1523 | int need_copy = 0; | |
1524 | char *end = p + len; | |
fac0d250 | 1525 | |
07a53e5c RH |
1526 | /* Line number sequences cannot go backward in addresses. This means |
1527 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1528 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 1529 | |
220e750f | 1530 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
1531 | scale_addr_delta (&addr_delta); |
1532 | ||
220e750f RH |
1533 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
1534 | We cannot use special opcodes here, since we want the end_sequence | |
1535 | to emit the matrix entry. */ | |
1536 | if (line_delta == INT_MAX) | |
fac0d250 | 1537 | { |
220e750f RH |
1538 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1539 | *p++ = DW_LNS_const_add_pc; | |
62e6b7b3 | 1540 | else if (addr_delta) |
fac0d250 | 1541 | { |
220e750f RH |
1542 | *p++ = DW_LNS_advance_pc; |
1543 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 1544 | } |
220e750f RH |
1545 | |
1546 | *p++ = DW_LNS_extended_op; | |
1547 | *p++ = 1; | |
1548 | *p++ = DW_LNE_end_sequence; | |
1549 | goto done; | |
fac0d250 RH |
1550 | } |
1551 | ||
220e750f RH |
1552 | /* Bias the line delta by the base. */ |
1553 | tmp = line_delta - DWARF2_LINE_BASE; | |
1554 | ||
1555 | /* If the line increment is out of range of a special opcode, we | |
1556 | must encode it with DW_LNS_advance_line. */ | |
1557 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 1558 | { |
220e750f RH |
1559 | *p++ = DW_LNS_advance_line; |
1560 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 1561 | |
220e750f RH |
1562 | line_delta = 0; |
1563 | tmp = 0 - DWARF2_LINE_BASE; | |
1564 | need_copy = 1; | |
1565 | } | |
fac0d250 | 1566 | |
bd0eb99b RH |
1567 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
1568 | special opcode. */ | |
1569 | if (line_delta == 0 && addr_delta == 0) | |
1570 | { | |
1571 | *p++ = DW_LNS_copy; | |
1572 | goto done; | |
1573 | } | |
1574 | ||
220e750f RH |
1575 | /* Bias the opcode by the special opcode base. */ |
1576 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1577 | |
220e750f RH |
1578 | /* Avoid overflow when addr_delta is large. */ |
1579 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 1580 | { |
220e750f RH |
1581 | /* Try using a special opcode. */ |
1582 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1583 | if (opcode <= 255) | |
1584 | { | |
1585 | *p++ = opcode; | |
1586 | goto done; | |
1587 | } | |
1588 | ||
1589 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1590 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1591 | if (opcode <= 255) | |
fac0d250 | 1592 | { |
220e750f RH |
1593 | *p++ = DW_LNS_const_add_pc; |
1594 | *p++ = opcode; | |
1595 | goto done; | |
fac0d250 RH |
1596 | } |
1597 | } | |
220e750f RH |
1598 | |
1599 | /* Otherwise use DW_LNS_advance_pc. */ | |
1600 | *p++ = DW_LNS_advance_pc; | |
1601 | p += output_leb128 (p, addr_delta, 0); | |
1602 | ||
1603 | if (need_copy) | |
1604 | *p++ = DW_LNS_copy; | |
fac0d250 | 1605 | else |
220e750f | 1606 | *p++ = tmp; |
fac0d250 | 1607 | |
220e750f | 1608 | done: |
9c2799c2 | 1609 | gas_assert (p == end); |
220e750f | 1610 | } |
a8316fe2 | 1611 | |
220e750f | 1612 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1613 | |
220e750f | 1614 | static void |
a2e22468 | 1615 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1616 | { |
1617 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1618 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1619 | } | |
9de8d8f1 | 1620 | |
1737851b BW |
1621 | /* Write out an alternative form of line and address skips using |
1622 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1623 | line and address information, but it is required if linker relaxation |
1624 | could change the code offsets. The following two routines *must* be | |
1625 | kept in sync. */ | |
453dc3f0 | 1626 | #define ADDR_DELTA_LIMIT 50000 |
1737851b | 1627 | |
7ddd14de BW |
1628 | static int |
1629 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1630 | { |
7ddd14de | 1631 | int len = 0; |
1737851b BW |
1632 | |
1633 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1634 | if (line_delta != INT_MAX) |
1635 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1636 | ||
453dc3f0 | 1637 | if (addr_delta > ADDR_DELTA_LIMIT) |
7ddd14de BW |
1638 | { |
1639 | /* DW_LNS_extended_op */ | |
1640 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1641 | /* DW_LNE_set_address */ | |
1642 | len += 1 + sizeof_address; | |
1643 | } | |
1644 | else | |
1645 | /* DW_LNS_fixed_advance_pc */ | |
1646 | len += 3; | |
1647 | ||
1737851b | 1648 | if (line_delta == INT_MAX) |
7ddd14de BW |
1649 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1650 | len += 3; | |
1651 | else | |
1652 | /* DW_LNS_copy */ | |
1653 | len += 1; | |
1654 | ||
1655 | return len; | |
1656 | } | |
1657 | ||
1658 | static void | |
1659 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1660 | char *p, int len) | |
1661 | { | |
91d6fa6a | 1662 | expressionS *pexp; |
7ddd14de BW |
1663 | char *end = p + len; |
1664 | ||
1665 | /* Line number sequences cannot go backward in addresses. This means | |
1666 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1667 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de | 1668 | |
b40bf0a2 NC |
1669 | /* Verify that we have kept in sync with size_fixed_inc_line_addr. */ |
1670 | gas_assert (len == size_fixed_inc_line_addr (line_delta, addr_delta)); | |
1671 | ||
7ddd14de BW |
1672 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ |
1673 | if (line_delta != INT_MAX) | |
1674 | { | |
1675 | *p++ = DW_LNS_advance_line; | |
1676 | p += output_leb128 (p, line_delta, 1); | |
1677 | } | |
1678 | ||
91d6fa6a | 1679 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1680 | |
1681 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1682 | advance the address by at most 64K. Linker relaxation (without | |
1683 | which this function would not be used) could change the operand by | |
1684 | an unknown amount. If the address increment is getting close to | |
1685 | the limit, just reset the address. */ | |
453dc3f0 | 1686 | if (addr_delta > ADDR_DELTA_LIMIT) |
1737851b | 1687 | { |
7ddd14de | 1688 | symbolS *to_sym; |
91d6fa6a | 1689 | expressionS exp; |
7ddd14de | 1690 | |
031e3350 | 1691 | memset (&exp, 0, sizeof exp); |
9f6db0d3 | 1692 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1693 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1694 | |
1695 | *p++ = DW_LNS_extended_op; | |
1696 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1697 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1698 | exp.X_op = O_symbol; |
1699 | exp.X_add_symbol = to_sym; | |
1700 | exp.X_add_number = 0; | |
62ebcb5c | 1701 | emit_expr_fix (&exp, sizeof_address, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de BW |
1702 | p += sizeof_address; |
1703 | } | |
1704 | else | |
1705 | { | |
1706 | *p++ = DW_LNS_fixed_advance_pc; | |
62ebcb5c | 1707 | emit_expr_fix (pexp, 2, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de | 1708 | p += 2; |
1737851b BW |
1709 | } |
1710 | ||
7ddd14de BW |
1711 | if (line_delta == INT_MAX) |
1712 | { | |
1713 | *p++ = DW_LNS_extended_op; | |
1714 | *p++ = 1; | |
1715 | *p++ = DW_LNE_end_sequence; | |
1716 | } | |
1717 | else | |
1718 | *p++ = DW_LNS_copy; | |
1737851b | 1719 | |
9c2799c2 | 1720 | gas_assert (p == end); |
1737851b BW |
1721 | } |
1722 | ||
220e750f RH |
1723 | /* Generate a variant frag that we can use to relax address/line |
1724 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1725 | |
220e750f | 1726 | static void |
07a53e5c | 1727 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1728 | { |
91d6fa6a | 1729 | expressionS exp; |
220e750f | 1730 | int max_chars; |
6576f0b5 | 1731 | |
031e3350 | 1732 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
1733 | exp.X_op = O_subtract; |
1734 | exp.X_add_symbol = to_sym; | |
1735 | exp.X_op_symbol = from_sym; | |
1736 | exp.X_add_number = 0; | |
fac0d250 | 1737 | |
220e750f RH |
1738 | /* The maximum size of the frag is the line delta with a maximum |
1739 | sized address delta. */ | |
7ddd14de BW |
1740 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1741 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1742 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1743 | else | |
1744 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1745 | |
220e750f | 1746 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1747 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1748 | } |
fac0d250 | 1749 | |
220e750f RH |
1750 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1751 | based on the current values of the symbols. It is called before | |
1752 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1753 | |
220e750f | 1754 | int |
a2e22468 | 1755 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1756 | { |
1757 | offsetT addr_delta; | |
1758 | int size; | |
fac0d250 | 1759 | |
6386f3a7 | 1760 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1761 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1762 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1763 | else | |
1764 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1765 | |
220e750f | 1766 | frag->fr_subtype = size; |
fac0d250 | 1767 | |
220e750f RH |
1768 | return size; |
1769 | } | |
1770 | ||
1771 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1772 | current values of the symbols. fr_subtype is the current length | |
1773 | of the frag. This returns the change in frag length. */ | |
1774 | ||
1775 | int | |
a2e22468 | 1776 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1777 | { |
1778 | int old_size, new_size; | |
fac0d250 | 1779 | |
220e750f RH |
1780 | old_size = frag->fr_subtype; |
1781 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1782 | |
220e750f | 1783 | return new_size - old_size; |
fac0d250 RH |
1784 | } |
1785 | ||
220e750f RH |
1786 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1787 | fill frag. This is called after all relaxation has been done. | |
1788 | fr_subtype will be the desired length of the frag. */ | |
1789 | ||
1790 | void | |
a2e22468 | 1791 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1792 | { |
220e750f RH |
1793 | offsetT addr_diff; |
1794 | ||
453dc3f0 NC |
1795 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1796 | { | |
2b0f3761 | 1797 | /* If linker relaxation is enabled then the distance between the two |
453dc3f0 NC |
1798 | symbols in the frag->fr_symbol expression might change. Hence we |
1799 | cannot rely upon the value computed by resolve_symbol_value. | |
1800 | Instead we leave the expression unfinalized and allow | |
1801 | emit_fixed_inc_line_addr to create a fixup (which later becomes a | |
1802 | relocation) that will allow the linker to correctly compute the | |
1803 | actual address difference. We have to use a fixed line advance for | |
1804 | this as we cannot (easily) relocate leb128 encoded values. */ | |
1805 | int saved_finalize_syms = finalize_syms; | |
1806 | ||
1807 | finalize_syms = 0; | |
1808 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
1809 | finalize_syms = saved_finalize_syms; | |
1810 | } | |
1811 | else | |
1812 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
fac0d250 | 1813 | |
220e750f RH |
1814 | /* fr_var carries the max_chars that we created the fragment with. |
1815 | fr_subtype carries the current expected length. We must, of | |
1816 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1817 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1818 | |
7ddd14de BW |
1819 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1820 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1821 | frag->fr_literal + frag->fr_fix, | |
1822 | frag->fr_subtype); | |
1823 | else | |
1824 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1825 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1826 | |
1827 | frag->fr_fix += frag->fr_subtype; | |
1828 | frag->fr_type = rs_fill; | |
1829 | frag->fr_var = 0; | |
1830 | frag->fr_offset = 0; | |
1831 | } | |
1832 | ||
1833 | /* Generate .debug_line content for the chain of line number entries | |
1834 | beginning at E, for segment SEG. */ | |
1835 | ||
1836 | static void | |
a2e22468 | 1837 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1838 | { |
1839 | unsigned filenum = 1; | |
1840 | unsigned line = 1; | |
1841 | unsigned column = 0; | |
bd0eb99b RH |
1842 | unsigned isa = 0; |
1843 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1844 | fragS *last_frag = NULL, *frag; |
1845 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1846 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1847 | struct line_entry *next; |
1848 | ||
b40bf0a2 NC |
1849 | if (flag_dwarf_sections) |
1850 | { | |
1851 | char * name; | |
1852 | const char * sec_name; | |
1853 | ||
2b0f3761 | 1854 | /* Switch to the relevant sub-section before we start to emit |
b40bf0a2 NC |
1855 | the line number table. |
1856 | ||
1857 | FIXME: These sub-sections do not have a normal Line Number | |
1858 | Program Header, thus strictly speaking they are not valid | |
1859 | DWARF sections. Unfortunately the DWARF standard assumes | |
1860 | a one-to-one relationship between compilation units and | |
1861 | line number tables. Thus we have to have a .debug_line | |
1862 | section, as well as our sub-sections, and we have to ensure | |
1863 | that all of the sub-sections are merged into a proper | |
1864 | .debug_line section before a debugger sees them. */ | |
3739860c | 1865 | |
fd361982 | 1866 | sec_name = bfd_section_name (seg); |
b40bf0a2 NC |
1867 | if (strcmp (sec_name, ".text") != 0) |
1868 | { | |
29a2809e | 1869 | name = concat (".debug_line", sec_name, (char *) NULL); |
b40bf0a2 NC |
1870 | subseg_set (subseg_get (name, FALSE), 0); |
1871 | } | |
1872 | else | |
1873 | /* Don't create a .debug_line.text section - | |
1874 | that is redundant. Instead just switch back to the | |
1875 | normal .debug_line section. */ | |
1876 | subseg_set (subseg_get (".debug_line", FALSE), 0); | |
1877 | } | |
1878 | ||
fead5cd9 | 1879 | do |
fac0d250 | 1880 | { |
07a53e5c | 1881 | int line_delta; |
220e750f RH |
1882 | |
1883 | if (filenum != e->loc.filenum) | |
fac0d250 | 1884 | { |
220e750f RH |
1885 | filenum = e->loc.filenum; |
1886 | out_opcode (DW_LNS_set_file); | |
1887 | out_uleb128 (filenum); | |
220e750f RH |
1888 | } |
1889 | ||
1890 | if (column != e->loc.column) | |
1891 | { | |
1892 | column = e->loc.column; | |
1893 | out_opcode (DW_LNS_set_column); | |
1894 | out_uleb128 (column); | |
220e750f RH |
1895 | } |
1896 | ||
92846e72 CC |
1897 | if (e->loc.discriminator != 0) |
1898 | { | |
1899 | out_opcode (DW_LNS_extended_op); | |
1900 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1901 | out_opcode (DW_LNE_set_discriminator); | |
1902 | out_uleb128 (e->loc.discriminator); | |
1903 | } | |
1904 | ||
bd0eb99b RH |
1905 | if (isa != e->loc.isa) |
1906 | { | |
1907 | isa = e->loc.isa; | |
1908 | out_opcode (DW_LNS_set_isa); | |
1909 | out_uleb128 (isa); | |
bd0eb99b RH |
1910 | } |
1911 | ||
1912 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1913 | { |
1914 | flags = e->loc.flags; | |
1915 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1916 | } |
1917 | ||
bd0eb99b | 1918 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1919 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1920 | |
bd0eb99b | 1921 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1922 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1923 | |
1924 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1925 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1926 | |
fb81275c JM |
1927 | /* Don't try to optimize away redundant entries; gdb wants two |
1928 | entries for a function where the code starts on the same line as | |
1929 | the {, and there's no way to identify that case here. Trust gcc | |
1930 | to optimize appropriately. */ | |
07a53e5c RH |
1931 | line_delta = e->loc.line - line; |
1932 | lab = e->label; | |
1933 | frag = symbol_get_frag (lab); | |
1934 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1935 | |
ba8826a8 AO |
1936 | if (last_frag == NULL |
1937 | || (e->loc.view == force_reset_view && force_reset_view | |
1938 | /* If we're going to reset the view, but we know we're | |
1939 | advancing the PC, we don't have to force with | |
1940 | set_address. We know we do when we're at the same | |
1941 | address of the same frag, and we know we might when | |
1942 | we're in the beginning of a frag, and we were at the | |
1943 | end of the previous frag. */ | |
1944 | && (frag == last_frag | |
1945 | ? (last_frag_ofs == frag_ofs) | |
1946 | : (frag_ofs == 0 | |
1947 | && ((offsetT)last_frag_ofs | |
1948 | >= get_frag_fix (last_frag, seg)))))) | |
220e750f | 1949 | { |
07a53e5c RH |
1950 | out_set_addr (lab); |
1951 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1952 | } |
7ddd14de | 1953 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1954 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1955 | else | |
1956 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1957 | ||
1958 | line = e->loc.line; | |
1959 | last_lab = lab; | |
1960 | last_frag = frag; | |
1961 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1962 | |
1963 | next = e->next; | |
1964 | free (e); | |
1965 | e = next; | |
fac0d250 | 1966 | } |
fead5cd9 | 1967 | while (e); |
353e2c69 | 1968 | |
220e750f | 1969 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1970 | frag = last_frag_for_seg (seg); |
c9049d30 | 1971 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1972 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1973 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1974 | else |
07a53e5c | 1975 | { |
e01e1cee | 1976 | lab = symbol_temp_new (seg, frag, frag_ofs); |
07a53e5c RH |
1977 | relax_inc_line_addr (INT_MAX, lab, last_lab); |
1978 | } | |
fac0d250 RH |
1979 | } |
1980 | ||
d2a54558 MW |
1981 | /* Switch to LINE_STR_SEG and output the given STR. Return the |
1982 | symbol pointing to the new string in the section. */ | |
1983 | ||
1984 | static symbolS * | |
1985 | add_line_strp (segT line_str_seg, const char *str) | |
1986 | { | |
1987 | char *cp; | |
1988 | size_t size; | |
1989 | symbolS *sym; | |
1990 | ||
1991 | subseg_set (line_str_seg, 0); | |
1992 | ||
1993 | sym = symbol_temp_new_now_octets (); | |
1994 | ||
1995 | size = strlen (str) + 1; | |
1996 | cp = frag_more (size); | |
1997 | memcpy (cp, str, size); | |
1998 | ||
1999 | return sym; | |
2000 | } | |
2001 | ||
2002 | ||
220e750f RH |
2003 | /* Emit the directory and file tables for .debug_line. */ |
2004 | ||
fac0d250 | 2005 | static void |
d2a54558 | 2006 | out_dir_and_file_list (segT line_seg, int sizeof_offset) |
fac0d250 RH |
2007 | { |
2008 | size_t size; | |
3d6b762c | 2009 | const char *dir; |
fac0d250 | 2010 | char *cp; |
220e750f | 2011 | unsigned int i; |
5496f3c6 NC |
2012 | bfd_boolean emit_md5 = FALSE; |
2013 | bfd_boolean emit_timestamps = TRUE; | |
2014 | bfd_boolean emit_filesize = TRUE; | |
d2a54558 MW |
2015 | segT line_str_seg = NULL; |
2016 | symbolS *line_strp; | |
220e750f | 2017 | |
5496f3c6 | 2018 | /* Output the Directory Table. */ |
5496f3c6 NC |
2019 | if (DWARF2_LINE_VERSION >= 5) |
2020 | { | |
546cb2d8 | 2021 | /* We only have one column in the directory table. */ |
5496f3c6 | 2022 | out_byte (1); |
546cb2d8 NC |
2023 | |
2024 | /* Describe the purpose and format of the column. */ | |
5496f3c6 | 2025 | out_uleb128 (DW_LNCT_path); |
d2a54558 MW |
2026 | /* Store these strings in the .debug_line_str section so they |
2027 | can be shared. */ | |
2028 | out_uleb128 (DW_FORM_line_strp); | |
546cb2d8 | 2029 | |
f63d03dd MW |
2030 | /* Now state how many rows there are in the table. We need at |
2031 | least 1 if there is one or more file names to store the | |
2032 | "working directory". */ | |
2033 | if (dirs_in_use == 0 && files_in_use > 0) | |
2034 | out_uleb128 (1); | |
2035 | else | |
2036 | out_uleb128 (dirs_in_use); | |
5496f3c6 NC |
2037 | } |
2038 | ||
a7ed1ca2 | 2039 | /* Emit directory list. */ |
f63d03dd | 2040 | if (DWARF2_LINE_VERSION >= 5 && (dirs_in_use > 0 || files_in_use > 0)) |
5496f3c6 | 2041 | { |
d2a54558 MW |
2042 | line_str_seg = subseg_new (".debug_line_str", 0); |
2043 | bfd_set_section_flags (line_str_seg, | |
2044 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2045 | | SEC_MERGE | SEC_STRINGS); | |
2046 | line_str_seg->entsize = 1; | |
2047 | ||
f63d03dd MW |
2048 | /* DWARF5 uses slot zero, but that is only set explicitly |
2049 | using a .file 0 directive. If that isn't used, but dir | |
2050 | one is used, then use that as main file directory. | |
2051 | Otherwise use pwd as main file directory. */ | |
2052 | if (dirs_in_use > 0 && dirs != NULL && dirs[0] != NULL) | |
5496f3c6 | 2053 | dir = remap_debug_filename (dirs[0]); |
f63d03dd MW |
2054 | else if (dirs_in_use > 1 && dirs != NULL && dirs[1] != NULL) |
2055 | dir = remap_debug_filename (dirs[1]); | |
2056 | else | |
2057 | dir = remap_debug_filename (getpwd ()); | |
2058 | ||
d2a54558 MW |
2059 | line_strp = add_line_strp (line_str_seg, dir); |
2060 | subseg_set (line_seg, 0); | |
2061 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
5496f3c6 | 2062 | } |
a7ed1ca2 NC |
2063 | for (i = 1; i < dirs_in_use; ++i) |
2064 | { | |
3d6b762c | 2065 | dir = remap_debug_filename (dirs[i]); |
d2a54558 MW |
2066 | if (DWARF2_LINE_VERSION < 5) |
2067 | { | |
2068 | size = strlen (dir) + 1; | |
2069 | cp = frag_more (size); | |
2070 | memcpy (cp, dir, size); | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | line_strp = add_line_strp (line_str_seg, dir); | |
2075 | subseg_set (line_seg, 0); | |
2076 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2077 | } | |
a7ed1ca2 | 2078 | } |
fac0d250 | 2079 | |
5496f3c6 NC |
2080 | if (DWARF2_LINE_VERSION < 5) |
2081 | /* Terminate it. */ | |
2082 | out_byte ('\0'); | |
2083 | ||
2084 | /* Output the File Name Table. */ | |
5496f3c6 NC |
2085 | if (DWARF2_LINE_VERSION >= 5) |
2086 | { | |
2087 | unsigned int columns = 4; | |
2088 | ||
2089 | if (((unsigned long) DWARF2_FILE_TIME_NAME ("", "")) == -1UL) | |
2090 | { | |
2091 | emit_timestamps = FALSE; | |
2092 | -- columns; | |
2093 | } | |
2094 | ||
2095 | if (DWARF2_FILE_SIZE_NAME ("", "") == -1) | |
2096 | { | |
2097 | emit_filesize = FALSE; | |
2098 | -- columns; | |
2099 | } | |
2100 | ||
2101 | for (i = 0; i < files_in_use; ++i) | |
2102 | if (files[i].md5[0] != 0) | |
2103 | break; | |
2104 | if (i < files_in_use) | |
2105 | { | |
2106 | emit_md5 = TRUE; | |
2107 | ++ columns; | |
2108 | } | |
2109 | ||
2110 | /* The number of format entries to follow. */ | |
2111 | out_byte (columns); | |
5496f3c6 NC |
2112 | /* The format of the file name. */ |
2113 | out_uleb128 (DW_LNCT_path); | |
d2a54558 MW |
2114 | /* Store these strings in the .debug_line_str section so they |
2115 | can be shared. */ | |
2116 | out_uleb128 (DW_FORM_line_strp); | |
5496f3c6 NC |
2117 | |
2118 | /* The format of the directory index. */ | |
2119 | out_uleb128 (DW_LNCT_directory_index); | |
2120 | out_uleb128 (DW_FORM_udata); | |
2121 | ||
2122 | if (emit_timestamps) | |
2123 | { | |
2124 | /* The format of the timestamp. */ | |
2125 | out_uleb128 (DW_LNCT_timestamp); | |
2126 | out_uleb128 (DW_FORM_udata); | |
2127 | } | |
2128 | ||
2129 | if (emit_filesize) | |
2130 | { | |
2131 | /* The format of the file size. */ | |
2132 | out_uleb128 (DW_LNCT_size); | |
2133 | out_uleb128 (DW_FORM_udata); | |
2134 | } | |
2135 | ||
2136 | if (emit_md5) | |
2137 | { | |
2138 | /* The format of the MD5 sum. */ | |
2139 | out_uleb128 (DW_LNCT_MD5); | |
2140 | out_uleb128 (DW_FORM_data16); | |
2141 | } | |
2142 | ||
2143 | /* The number of entries in the table. */ | |
2144 | out_uleb128 (files_in_use); | |
2145 | } | |
2146 | ||
2147 | for (i = DWARF2_LINE_VERSION > 4 ? 0 : 1; i < files_in_use; ++i) | |
fac0d250 | 2148 | { |
01e1a5bc NC |
2149 | const char *fullfilename; |
2150 | ||
249e3833 RH |
2151 | if (files[i].filename == NULL) |
2152 | { | |
f63d03dd MW |
2153 | /* Prevent a crash later, particularly for file 1. DWARF5 |
2154 | uses slot zero, but that is only set explicitly using a | |
2155 | .file 0 directive. If that isn't used, but file 1 is, | |
2156 | then use that as main file name. */ | |
2157 | if (DWARF2_LINE_VERSION >= 5 && i == 0 && files_in_use >= 1) | |
2158 | files[0].filename = files[1].filename; | |
2159 | else | |
2160 | files[i].filename = ""; | |
5496f3c6 NC |
2161 | if (DWARF2_LINE_VERSION < 5 || i != 0) |
2162 | { | |
2163 | as_bad (_("unassigned file number %ld"), (long) i); | |
2164 | continue; | |
2165 | } | |
249e3833 RH |
2166 | } |
2167 | ||
01e1a5bc NC |
2168 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
2169 | files[i].dir ? dirs [files [i].dir] : ""); | |
d2a54558 MW |
2170 | if (DWARF2_LINE_VERSION < 5) |
2171 | { | |
2172 | size = strlen (fullfilename) + 1; | |
2173 | cp = frag_more (size); | |
2174 | memcpy (cp, fullfilename, size); | |
2175 | } | |
2176 | else | |
2177 | { | |
2178 | line_strp = add_line_strp (line_str_seg, fullfilename); | |
2179 | subseg_set (line_seg, 0); | |
2180 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2181 | } | |
fac0d250 | 2182 | |
5496f3c6 NC |
2183 | /* Directory number. */ |
2184 | out_uleb128 (files[i].dir); | |
2185 | ||
01e1a5bc | 2186 | /* Output the last modification timestamp. */ |
5496f3c6 NC |
2187 | if (emit_timestamps) |
2188 | { | |
2189 | offsetT timestamp; | |
2190 | ||
2191 | timestamp = DWARF2_FILE_TIME_NAME (files[i].filename, | |
2192 | files[i].dir ? dirs [files [i].dir] : ""); | |
2193 | if (timestamp == -1) | |
2194 | timestamp = 0; | |
2195 | out_uleb128 (timestamp); | |
2196 | } | |
2197 | ||
01e1a5bc | 2198 | /* Output the filesize. */ |
5496f3c6 NC |
2199 | if (emit_filesize) |
2200 | { | |
2201 | offsetT filesize; | |
2202 | filesize = DWARF2_FILE_SIZE_NAME (files[i].filename, | |
2203 | files[i].dir ? dirs [files [i].dir] : ""); | |
2204 | if (filesize == -1) | |
2205 | filesize = 0; | |
2206 | out_uleb128 (filesize); | |
2207 | } | |
2208 | ||
2209 | /* Output the md5 sum. */ | |
2210 | if (emit_md5) | |
2211 | { | |
2212 | int b; | |
2213 | ||
2214 | for (b = 0; b < NUM_MD5_BYTES; b++) | |
2215 | out_byte (files[i].md5[b]); | |
2216 | } | |
fac0d250 | 2217 | } |
353e2c69 | 2218 | |
5496f3c6 NC |
2219 | if (DWARF2_LINE_VERSION < 5) |
2220 | /* Terminate filename list. */ | |
2221 | out_byte (0); | |
fac0d250 RH |
2222 | } |
2223 | ||
413a266c AM |
2224 | /* Switch to SEC and output a header length field. Return the size of |
2225 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
d025d5e5 MW |
2226 | to the end of the section. EXPR->X_add_number will be set to the |
2227 | negative size of the header. */ | |
413a266c AM |
2228 | |
2229 | static int | |
91d6fa6a | 2230 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
2231 | { |
2232 | symbolS *start_sym; | |
2233 | symbolS *end_sym; | |
2234 | ||
2235 | subseg_set (sec, 0); | |
b57dc16f | 2236 | |
0f8f0c57 NC |
2237 | if (flag_dwarf_sections) |
2238 | { | |
2239 | /* If we are going to put the start and end symbols in different | |
2240 | sections, then we need real symbols, not just fake, local ones. */ | |
2241 | frag_now_fix (); | |
2242 | start_sym = symbol_make (".Ldebug_line_start"); | |
2243 | end_sym = symbol_make (".Ldebug_line_end"); | |
2244 | symbol_set_value_now (start_sym); | |
2245 | } | |
2246 | else | |
0f8f0c57 | 2247 | { |
72354279 | 2248 | start_sym = symbol_temp_new_now_octets (); |
0f8f0c57 NC |
2249 | end_sym = symbol_temp_make (); |
2250 | } | |
413a266c AM |
2251 | |
2252 | /* Total length of the information. */ | |
91d6fa6a NC |
2253 | exp->X_op = O_subtract; |
2254 | exp->X_add_symbol = end_sym; | |
2255 | exp->X_op_symbol = start_sym; | |
413a266c AM |
2256 | |
2257 | switch (DWARF2_FORMAT (sec)) | |
2258 | { | |
2259 | case dwarf2_format_32bit: | |
91d6fa6a NC |
2260 | exp->X_add_number = -4; |
2261 | emit_expr (exp, 4); | |
413a266c AM |
2262 | return 4; |
2263 | ||
2264 | case dwarf2_format_64bit: | |
91d6fa6a | 2265 | exp->X_add_number = -12; |
413a266c | 2266 | out_four (-1); |
91d6fa6a | 2267 | emit_expr (exp, 8); |
413a266c AM |
2268 | return 8; |
2269 | ||
2270 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
2271 | exp->X_add_number = -8; |
2272 | emit_expr (exp, 8); | |
413a266c AM |
2273 | return 8; |
2274 | } | |
2275 | ||
2276 | as_fatal (_("internal error: unknown dwarf2 format")); | |
2277 | return 0; | |
2278 | } | |
2279 | ||
220e750f RH |
2280 | /* Emit the collected .debug_line data. */ |
2281 | ||
2282 | static void | |
a2e22468 | 2283 | out_debug_line (segT line_seg) |
220e750f | 2284 | { |
91d6fa6a | 2285 | expressionS exp; |
02fe846e | 2286 | symbolS *prologue_start, *prologue_end; |
220e750f RH |
2287 | symbolS *line_end; |
2288 | struct line_seg *s; | |
14e777e0 | 2289 | int sizeof_offset; |
220e750f | 2290 | |
031e3350 | 2291 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2292 | sizeof_offset = out_header (line_seg, &exp); |
2293 | line_end = exp.X_add_symbol; | |
220e750f RH |
2294 | |
2295 | /* Version. */ | |
88ebb0a1 | 2296 | out_two (DWARF2_LINE_VERSION); |
220e750f | 2297 | |
5496f3c6 NC |
2298 | if (DWARF2_LINE_VERSION >= 5) |
2299 | { | |
2300 | out_byte (sizeof_address); | |
2301 | out_byte (0); /* Segment Selector size. */ | |
2302 | } | |
220e750f | 2303 | /* Length of the prologue following this length. */ |
02fe846e | 2304 | prologue_start = symbol_temp_make (); |
413a266c | 2305 | prologue_end = symbol_temp_make (); |
02fe846e | 2306 | exp.X_op = O_subtract; |
91d6fa6a | 2307 | exp.X_add_symbol = prologue_end; |
02fe846e AM |
2308 | exp.X_op_symbol = prologue_start; |
2309 | exp.X_add_number = 0; | |
91d6fa6a | 2310 | emit_expr (&exp, sizeof_offset); |
e2b9a97e | 2311 | symbol_set_value_now (prologue_start); |
220e750f RH |
2312 | |
2313 | /* Parameters of the state machine. */ | |
2314 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
5496f3c6 NC |
2315 | if (DWARF2_LINE_VERSION >= 4) |
2316 | out_byte (DWARF2_LINE_MAX_OPS_PER_INSN); | |
220e750f RH |
2317 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); |
2318 | out_byte (DWARF2_LINE_BASE); | |
2319 | out_byte (DWARF2_LINE_RANGE); | |
2320 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
2321 | ||
2322 | /* Standard opcode lengths. */ | |
2323 | out_byte (0); /* DW_LNS_copy */ | |
2324 | out_byte (1); /* DW_LNS_advance_pc */ | |
2325 | out_byte (1); /* DW_LNS_advance_line */ | |
2326 | out_byte (1); /* DW_LNS_set_file */ | |
2327 | out_byte (1); /* DW_LNS_set_column */ | |
2328 | out_byte (0); /* DW_LNS_negate_stmt */ | |
2329 | out_byte (0); /* DW_LNS_set_basic_block */ | |
2330 | out_byte (0); /* DW_LNS_const_add_pc */ | |
2331 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
2332 | out_byte (0); /* DW_LNS_set_prologue_end */ |
2333 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
2334 | out_byte (1); /* DW_LNS_set_isa */ | |
5496f3c6 NC |
2335 | /* We have emitted 12 opcode lengths, so make that this |
2336 | matches up to the opcode base value we have been using. */ | |
2337 | gas_assert (DWARF2_LINE_OPCODE_BASE == 13); | |
220e750f | 2338 | |
d2a54558 | 2339 | out_dir_and_file_list (line_seg, sizeof_offset); |
220e750f | 2340 | |
e2b9a97e | 2341 | symbol_set_value_now (prologue_end); |
220e750f RH |
2342 | |
2343 | /* For each section, emit a statement program. */ | |
ee515fb7 | 2344 | for (s = all_segs; s; s = s->next) |
9aec2026 NC |
2345 | if (SEG_NORMAL (s->seg)) |
2346 | process_entries (s->seg, s->head->head); | |
2347 | else | |
2348 | as_warn ("dwarf line number information for %s ignored", | |
2349 | segment_name (s->seg)); | |
220e750f | 2350 | |
b40bf0a2 NC |
2351 | if (flag_dwarf_sections) |
2352 | /* We have to switch to the special .debug_line_end section | |
2353 | before emitting the end-of-debug_line symbol. The linker | |
2354 | script arranges for this section to be placed after all the | |
2355 | (potentially garbage collected) .debug_line.<foo> sections. | |
2356 | This section contains the line_end symbol which is used to | |
2357 | compute the size of the linked .debug_line section, as seen | |
2358 | in the DWARF Line Number header. */ | |
2359 | subseg_set (subseg_get (".debug_line_end", FALSE), 0); | |
2360 | ||
e2b9a97e | 2361 | symbol_set_value_now (line_end); |
220e750f RH |
2362 | } |
2363 | ||
802f5d9e | 2364 | static void |
bdd3b953 | 2365 | out_debug_ranges (segT ranges_seg, symbolS **ranges_sym) |
802f5d9e NC |
2366 | { |
2367 | unsigned int addr_size = sizeof_address; | |
2368 | struct line_seg *s; | |
91d6fa6a | 2369 | expressionS exp; |
802f5d9e NC |
2370 | unsigned int i; |
2371 | ||
031e3350 | 2372 | memset (&exp, 0, sizeof exp); |
802f5d9e NC |
2373 | subseg_set (ranges_seg, 0); |
2374 | ||
bdd3b953 MW |
2375 | /* For DW_AT_ranges to point at (there is no header, so really start |
2376 | of section, but see out_debug_rnglists). */ | |
2377 | *ranges_sym = symbol_temp_new_now_octets (); | |
2378 | ||
802f5d9e | 2379 | /* Base Address Entry. */ |
7fd3924a | 2380 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2381 | out_byte (0xff); |
7fd3924a | 2382 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2383 | out_byte (0); |
2384 | ||
2385 | /* Range List Entry. */ | |
2386 | for (s = all_segs; s; s = s->next) | |
2387 | { | |
2388 | fragS *frag; | |
2389 | symbolS *beg, *end; | |
2390 | ||
2391 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2392 | beg = symbol_temp_new (s->seg, frag, 0); |
802f5d9e NC |
2393 | s->text_start = beg; |
2394 | ||
2395 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2396 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
802f5d9e NC |
2397 | s->text_end = end; |
2398 | ||
91d6fa6a NC |
2399 | exp.X_op = O_symbol; |
2400 | exp.X_add_symbol = beg; | |
2401 | exp.X_add_number = 0; | |
2402 | emit_expr (&exp, addr_size); | |
802f5d9e | 2403 | |
91d6fa6a NC |
2404 | exp.X_op = O_symbol; |
2405 | exp.X_add_symbol = end; | |
2406 | exp.X_add_number = 0; | |
2407 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
2408 | } |
2409 | ||
2410 | /* End of Range Entry. */ | |
7fd3924a | 2411 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2412 | out_byte (0); |
7fd3924a | 2413 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2414 | out_byte (0); |
2415 | } | |
2416 | ||
bdd3b953 MW |
2417 | static void |
2418 | out_debug_rnglists (segT ranges_seg, symbolS **ranges_sym) | |
2419 | { | |
2420 | expressionS exp; | |
2421 | symbolS *ranges_end; | |
2422 | struct line_seg *s; | |
2423 | ||
2424 | /* Unit length. */ | |
2425 | memset (&exp, 0, sizeof exp); | |
2426 | out_header (ranges_seg, &exp); | |
2427 | ranges_end = exp.X_add_symbol; | |
2428 | ||
2429 | out_two (DWARF2_RNGLISTS_VERSION); | |
2430 | out_byte (sizeof_address); | |
2431 | out_byte (0); /* Segment Selector size. */ | |
2432 | out_four (0); /* Offset entry count. */ | |
2433 | ||
2434 | /* For DW_AT_ranges to point at (must be after the header). */ | |
2435 | *ranges_sym = symbol_temp_new_now_octets (); | |
2436 | ||
2437 | for (s = all_segs; s; s = s->next) | |
2438 | { | |
2439 | fragS *frag; | |
2440 | symbolS *beg, *end; | |
2441 | ||
2442 | out_byte (DW_RLE_start_length); | |
2443 | ||
2444 | frag = first_frag_for_seg (s->seg); | |
2445 | beg = symbol_temp_new (s->seg, frag, 0); | |
2446 | s->text_start = beg; | |
2447 | ||
2448 | frag = last_frag_for_seg (s->seg); | |
2449 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); | |
2450 | s->text_end = end; | |
2451 | ||
2452 | exp.X_op = O_symbol; | |
2453 | exp.X_add_symbol = beg; | |
2454 | exp.X_add_number = 0; | |
2455 | emit_expr (&exp, sizeof_address); | |
2456 | ||
2457 | exp.X_op = O_symbol; | |
2458 | exp.X_add_symbol = end; | |
2459 | exp.X_add_number = 0; | |
2460 | emit_leb128_expr (&exp, 0); | |
2461 | } | |
2462 | ||
2463 | out_byte (DW_RLE_end_of_list); | |
2464 | ||
2465 | symbol_set_value_now (ranges_end); | |
2466 | } | |
2467 | ||
220e750f RH |
2468 | /* Emit data for .debug_aranges. */ |
2469 | ||
58b5739a | 2470 | static void |
a2e22468 | 2471 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 2472 | { |
220e750f | 2473 | unsigned int addr_size = sizeof_address; |
d025d5e5 | 2474 | offsetT size; |
220e750f | 2475 | struct line_seg *s; |
91d6fa6a | 2476 | expressionS exp; |
413a266c | 2477 | symbolS *aranges_end; |
220e750f | 2478 | char *p; |
413a266c | 2479 | int sizeof_offset; |
fac0d250 | 2480 | |
031e3350 | 2481 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2482 | sizeof_offset = out_header (aranges_seg, &exp); |
2483 | aranges_end = exp.X_add_symbol; | |
d025d5e5 | 2484 | size = -exp.X_add_number; |
fac0d250 | 2485 | |
220e750f | 2486 | /* Version. */ |
88ebb0a1 | 2487 | out_two (DWARF2_ARANGES_VERSION); |
d025d5e5 | 2488 | size += 2; |
4dc7ead9 | 2489 | |
220e750f | 2490 | /* Offset to .debug_info. */ |
413a266c | 2491 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
d025d5e5 | 2492 | size += sizeof_offset; |
220e750f RH |
2493 | |
2494 | /* Size of an address (offset portion). */ | |
2495 | out_byte (addr_size); | |
d025d5e5 | 2496 | size++; |
220e750f RH |
2497 | |
2498 | /* Size of a segment descriptor. */ | |
2499 | out_byte (0); | |
d025d5e5 | 2500 | size++; |
220e750f RH |
2501 | |
2502 | /* Align the header. */ | |
d025d5e5 MW |
2503 | while ((size++ % (2 * addr_size)) > 0) |
2504 | out_byte (0); | |
4dc7ead9 | 2505 | |
ee515fb7 | 2506 | for (s = all_segs; s; s = s->next) |
220e750f RH |
2507 | { |
2508 | fragS *frag; | |
2509 | symbolS *beg, *end; | |
2510 | ||
2511 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2512 | beg = symbol_temp_new (s->seg, frag, 0); |
220e750f RH |
2513 | s->text_start = beg; |
2514 | ||
2515 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2516 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
220e750f RH |
2517 | s->text_end = end; |
2518 | ||
91d6fa6a NC |
2519 | exp.X_op = O_symbol; |
2520 | exp.X_add_symbol = beg; | |
2521 | exp.X_add_number = 0; | |
2522 | emit_expr (&exp, addr_size); | |
220e750f | 2523 | |
91d6fa6a NC |
2524 | exp.X_op = O_subtract; |
2525 | exp.X_add_symbol = end; | |
2526 | exp.X_op_symbol = beg; | |
2527 | exp.X_add_number = 0; | |
2528 | emit_expr (&exp, addr_size); | |
220e750f | 2529 | } |
4dc7ead9 | 2530 | |
220e750f RH |
2531 | p = frag_more (2 * addr_size); |
2532 | md_number_to_chars (p, 0, addr_size); | |
2533 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c | 2534 | |
e2b9a97e | 2535 | symbol_set_value_now (aranges_end); |
4dc7ead9 RH |
2536 | } |
2537 | ||
220e750f RH |
2538 | /* Emit data for .debug_abbrev. Note that this must be kept in |
2539 | sync with out_debug_info below. */ | |
fac0d250 | 2540 | |
220e750f | 2541 | static void |
413a266c AM |
2542 | out_debug_abbrev (segT abbrev_seg, |
2543 | segT info_seg ATTRIBUTE_UNUSED, | |
2544 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f | 2545 | { |
dd216e07 | 2546 | int secoff_form; |
220e750f | 2547 | subseg_set (abbrev_seg, 0); |
fac0d250 | 2548 | |
220e750f RH |
2549 | out_uleb128 (1); |
2550 | out_uleb128 (DW_TAG_compile_unit); | |
2551 | out_byte (DW_CHILDREN_no); | |
dd216e07 MW |
2552 | if (DWARF2_VERSION < 4) |
2553 | { | |
2554 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) | |
2555 | secoff_form = DW_FORM_data4; | |
2556 | else | |
2557 | secoff_form = DW_FORM_data8; | |
2558 | } | |
413a266c | 2559 | else |
dd216e07 MW |
2560 | secoff_form = DW_FORM_sec_offset; |
2561 | out_abbrev (DW_AT_stmt_list, secoff_form); | |
220e750f | 2562 | if (all_segs->next == NULL) |
4dc7ead9 | 2563 | { |
220e750f | 2564 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
88ebb0a1 MW |
2565 | if (DWARF2_VERSION < 4) |
2566 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
2567 | else | |
6b9a135d | 2568 | out_abbrev (DW_AT_high_pc, DW_FORM_udata); |
220e750f | 2569 | } |
802f5d9e | 2570 | else |
dd216e07 | 2571 | out_abbrev (DW_AT_ranges, secoff_form); |
49fced12 MW |
2572 | out_abbrev (DW_AT_name, DW_FORM_strp); |
2573 | out_abbrev (DW_AT_comp_dir, DW_FORM_strp); | |
2574 | out_abbrev (DW_AT_producer, DW_FORM_strp); | |
220e750f RH |
2575 | out_abbrev (DW_AT_language, DW_FORM_data2); |
2576 | out_abbrev (0, 0); | |
a987bfc9 RH |
2577 | |
2578 | /* Terminate the abbreviations for this compilation unit. */ | |
2579 | out_byte (0); | |
220e750f | 2580 | } |
4dc7ead9 | 2581 | |
220e750f | 2582 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 2583 | |
220e750f | 2584 | static void |
bdd3b953 MW |
2585 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, |
2586 | symbolS *ranges_sym, symbolS *name_sym, | |
2587 | symbolS *comp_dir_sym, symbolS *producer_sym) | |
220e750f | 2588 | { |
91d6fa6a | 2589 | expressionS exp; |
220e750f | 2590 | symbolS *info_end; |
14e777e0 | 2591 | int sizeof_offset; |
4dc7ead9 | 2592 | |
031e3350 | 2593 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2594 | sizeof_offset = out_header (info_seg, &exp); |
2595 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 2596 | |
220e750f | 2597 | /* DWARF version. */ |
fc0eebac | 2598 | out_two (DWARF2_VERSION); |
4dc7ead9 | 2599 | |
a3b3e858 MW |
2600 | if (DWARF2_VERSION < 5) |
2601 | { | |
2602 | /* .debug_abbrev offset */ | |
2603 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2604 | } | |
2605 | else | |
2606 | { | |
2607 | /* unit (header) type */ | |
2608 | out_byte (DW_UT_compile); | |
2609 | } | |
4dc7ead9 | 2610 | |
220e750f RH |
2611 | /* Target address size. */ |
2612 | out_byte (sizeof_address); | |
fac0d250 | 2613 | |
a3b3e858 MW |
2614 | if (DWARF2_VERSION >= 5) |
2615 | { | |
2616 | /* .debug_abbrev offset */ | |
2617 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2618 | } | |
2619 | ||
220e750f RH |
2620 | /* DW_TAG_compile_unit DIE abbrev */ |
2621 | out_uleb128 (1); | |
fac0d250 | 2622 | |
220e750f | 2623 | /* DW_AT_stmt_list */ |
413a266c AM |
2624 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
2625 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
2626 | ? 4 : 8)); | |
fac0d250 | 2627 | |
802f5d9e | 2628 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 2629 | if (all_segs->next == NULL) |
58b5739a | 2630 | { |
220e750f | 2631 | /* DW_AT_low_pc */ |
91d6fa6a NC |
2632 | exp.X_op = O_symbol; |
2633 | exp.X_add_symbol = all_segs->text_start; | |
2634 | exp.X_add_number = 0; | |
2635 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
2636 | |
2637 | /* DW_AT_high_pc */ | |
88ebb0a1 MW |
2638 | if (DWARF2_VERSION < 4) |
2639 | exp.X_op = O_symbol; | |
2640 | else | |
2641 | { | |
2642 | exp.X_op = O_subtract; | |
2643 | exp.X_op_symbol = all_segs->text_start; | |
2644 | } | |
91d6fa6a NC |
2645 | exp.X_add_symbol = all_segs->text_end; |
2646 | exp.X_add_number = 0; | |
6b9a135d MW |
2647 | if (DWARF2_VERSION < 4) |
2648 | emit_expr (&exp, sizeof_address); | |
2649 | else | |
2650 | emit_leb128_expr (&exp, 0); | |
58b5739a | 2651 | } |
802f5d9e NC |
2652 | else |
2653 | { | |
eb1fe072 NC |
2654 | /* This attribute is emitted if the code is disjoint. */ |
2655 | /* DW_AT_ranges. */ | |
bdd3b953 | 2656 | TC_DWARF2_EMIT_OFFSET (ranges_sym, sizeof_offset); |
802f5d9e | 2657 | } |
58b5739a | 2658 | |
49fced12 MW |
2659 | /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str |
2660 | setup in out_debug_str below. */ | |
2661 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2662 | TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset); | |
2663 | TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset); | |
2664 | ||
2665 | /* DW_AT_language. Yes, this is probably not really MIPS, but the | |
2666 | dwarf2 draft has no standard code for assembler. */ | |
2667 | out_two (DW_LANG_Mips_Assembler); | |
2668 | ||
e2b9a97e | 2669 | symbol_set_value_now (info_end); |
49fced12 MW |
2670 | } |
2671 | ||
2672 | /* Emit the three debug strings needed in .debug_str and setup symbols | |
2673 | to them for use in out_debug_info. */ | |
2674 | static void | |
2675 | out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym, | |
2676 | symbolS **producer_sym) | |
2677 | { | |
2678 | char producer[128]; | |
2679 | const char *comp_dir; | |
2680 | const char *dirname; | |
2681 | char *p; | |
2682 | int len; | |
5496f3c6 | 2683 | int first_file = DWARF2_LINE_VERSION > 4 ? 0 : 1; |
49fced12 MW |
2684 | |
2685 | subseg_set (str_seg, 0); | |
2686 | ||
48b91938 | 2687 | /* DW_AT_name. We don't have the actual file name that was present |
5496f3c6 | 2688 | on the command line, so assume files[first_file] is the main input file. |
48b91938 RH |
2689 | We're not supposed to get called unless at least one line number |
2690 | entry was emitted, so this should always be defined. */ | |
5c4e5fe6 | 2691 | *name_sym = symbol_temp_new_now_octets (); |
7fd3924a | 2692 | if (files_in_use == 0) |
48b91938 | 2693 | abort (); |
5496f3c6 | 2694 | if (files[first_file].dir) |
a7ed1ca2 | 2695 | { |
5496f3c6 | 2696 | dirname = remap_debug_filename (dirs[files[first_file].dir]); |
3d6b762c | 2697 | len = strlen (dirname); |
198f1251 TG |
2698 | #ifdef TE_VMS |
2699 | /* Already has trailing slash. */ | |
2700 | p = frag_more (len); | |
2701 | memcpy (p, dirname, len); | |
2702 | #else | |
a7ed1ca2 | 2703 | p = frag_more (len + 1); |
3d6b762c | 2704 | memcpy (p, dirname, len); |
56487c55 | 2705 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 2706 | #endif |
a7ed1ca2 | 2707 | } |
5496f3c6 | 2708 | len = strlen (files[first_file].filename) + 1; |
48b91938 | 2709 | p = frag_more (len); |
5496f3c6 | 2710 | memcpy (p, files[first_file].filename, len); |
48b91938 | 2711 | |
220e750f | 2712 | /* DW_AT_comp_dir */ |
5c4e5fe6 | 2713 | *comp_dir_sym = symbol_temp_new_now_octets (); |
3d6b762c | 2714 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
2715 | len = strlen (comp_dir) + 1; |
2716 | p = frag_more (len); | |
2717 | memcpy (p, comp_dir, len); | |
fac0d250 | 2718 | |
220e750f | 2719 | /* DW_AT_producer */ |
5c4e5fe6 | 2720 | *producer_sym = symbol_temp_new_now_octets (); |
220e750f RH |
2721 | sprintf (producer, "GNU AS %s", VERSION); |
2722 | len = strlen (producer) + 1; | |
2723 | p = frag_more (len); | |
2724 | memcpy (p, producer, len); | |
fac0d250 RH |
2725 | } |
2726 | ||
1e9cc1c2 NC |
2727 | void |
2728 | dwarf2_init (void) | |
2729 | { | |
1e9cc1c2 | 2730 | last_seg_ptr = &all_segs; |
0ac2b354 AB |
2731 | |
2732 | /* Select the default CIE version to produce here. The global | |
2733 | starts with a value of -1 and will be modified to a valid value | |
2734 | either by the user providing a command line option, or some | |
2735 | targets will select their own default in md_after_parse_args. If | |
2736 | we get here and the global still contains -1 then it is up to us | |
2737 | to pick a sane default. The default we choose is 1, this is the | |
2738 | CIE version gas has produced for a long time, and there seems no | |
2739 | reason to change it yet. */ | |
2740 | if (flag_dwarf_cie_version == -1) | |
2741 | flag_dwarf_cie_version = 1; | |
1e9cc1c2 NC |
2742 | } |
2743 | ||
2744 | ||
c6cb92c5 | 2745 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
edc7a80a | 2746 | were any .file/.loc directives, or --gdwarf2 was given, and if the |
df1c40a7 L |
2747 | file has a non-empty .debug_info section and an empty .debug_line |
2748 | section. If we emit .debug_line, and the .debug_info section is | |
2749 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
2750 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
2751 | or --gdwarf2 was given and there were any located instructions | |
2752 | emitted. */ | |
c6cb92c5 | 2753 | |
fac0d250 | 2754 | void |
a2e22468 | 2755 | dwarf2_finish (void) |
fac0d250 | 2756 | { |
220e750f RH |
2757 | segT line_seg; |
2758 | struct line_seg *s; | |
c6cb92c5 NS |
2759 | segT info_seg; |
2760 | int emit_other_sections = 0; | |
df1c40a7 | 2761 | int empty_debug_line = 0; |
c6cb92c5 NS |
2762 | |
2763 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
2764 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 2765 | |
df1c40a7 L |
2766 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
2767 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
2768 | ||
2769 | /* We can't construct a new debug_line section if we already have one. | |
edc7a80a MW |
2770 | Give an error if we have seen any .loc, otherwise trust the user |
2771 | knows what they are doing and want to generate the .debug_line | |
2772 | (and all other debug sections) themselves. */ | |
2773 | if (all_segs && !empty_debug_line && dwarf2_any_loc_directive_seen) | |
df1c40a7 L |
2774 | as_fatal ("duplicate .debug_line sections"); |
2775 | ||
2776 | if ((!all_segs && emit_other_sections) | |
2777 | || (!emit_other_sections && !empty_debug_line)) | |
2778 | /* If there is no line information and no non-empty .debug_info | |
2779 | section, or if there is both a non-empty .debug_info and a non-empty | |
2780 | .debug_line, then we do nothing. */ | |
220e750f | 2781 | return; |
fac0d250 | 2782 | |
220e750f | 2783 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 2784 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 2785 | |
220e750f | 2786 | /* Create and switch to the line number section. */ |
edc7a80a MW |
2787 | if (empty_debug_line) |
2788 | { | |
2789 | line_seg = subseg_new (".debug_line", 0); | |
2790 | bfd_set_section_flags (line_seg, | |
2791 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2792 | } | |
fac0d250 | 2793 | |
220e750f | 2794 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 2795 | for (s = all_segs; s; s = s->next) |
fac0d250 | 2796 | { |
91d6fa6a NC |
2797 | struct line_subseg *lss = s->head; |
2798 | struct line_entry **ptail = lss->ptail; | |
220e750f | 2799 | |
62e6b7b3 AO |
2800 | /* Reset the initial view of the first subsection of the |
2801 | section. */ | |
2802 | if (lss->head && lss->head->loc.view) | |
2803 | set_or_check_view (lss->head, NULL, NULL); | |
2804 | ||
91d6fa6a | 2805 | while ((lss = lss->next) != NULL) |
220e750f | 2806 | { |
62e6b7b3 AO |
2807 | /* Link the first view of subsequent subsections to the |
2808 | previous view. */ | |
2809 | if (lss->head && lss->head->loc.view) | |
2810 | set_or_check_view (lss->head, | |
2811 | !s->head ? NULL : (struct line_entry *)ptail, | |
2812 | s->head ? s->head->head : NULL); | |
91d6fa6a NC |
2813 | *ptail = lss->head; |
2814 | ptail = lss->ptail; | |
220e750f | 2815 | } |
fac0d250 | 2816 | } |
85a39694 | 2817 | |
edc7a80a MW |
2818 | if (empty_debug_line) |
2819 | out_debug_line (line_seg); | |
85a39694 | 2820 | |
c6cb92c5 | 2821 | /* If this is assembler generated line info, and there is no |
49fced12 MW |
2822 | debug_info already, we need .debug_info, .debug_abbrev and |
2823 | .debug_str sections as well. */ | |
c6cb92c5 | 2824 | if (emit_other_sections) |
220e750f RH |
2825 | { |
2826 | segT abbrev_seg; | |
220e750f | 2827 | segT aranges_seg; |
49fced12 | 2828 | segT str_seg; |
bdd3b953 | 2829 | symbolS *name_sym, *comp_dir_sym, *producer_sym, *ranges_sym; |
4dc7ead9 | 2830 | |
9c2799c2 | 2831 | gas_assert (all_segs); |
7fd3924a | 2832 | |
220e750f RH |
2833 | info_seg = subseg_new (".debug_info", 0); |
2834 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
2835 | aranges_seg = subseg_new (".debug_aranges", 0); | |
49fced12 | 2836 | str_seg = subseg_new (".debug_str", 0); |
ef99799a | 2837 | |
61826503 CE |
2838 | bfd_set_section_flags (info_seg, |
2839 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2840 | bfd_set_section_flags (abbrev_seg, | |
2841 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2842 | bfd_set_section_flags (aranges_seg, | |
2843 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2844 | bfd_set_section_flags (str_seg, | |
2845 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2846 | | SEC_MERGE | SEC_STRINGS); | |
49fced12 | 2847 | str_seg->entsize = 1; |
ef99799a | 2848 | |
ee515fb7 | 2849 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 2850 | |
802f5d9e | 2851 | if (all_segs->next == NULL) |
bdd3b953 | 2852 | ranges_sym = NULL; |
802f5d9e NC |
2853 | else |
2854 | { | |
bdd3b953 MW |
2855 | if (DWARF2_VERSION < 5) |
2856 | { | |
2857 | segT ranges_seg = subseg_new (".debug_ranges", 0); | |
2858 | bfd_set_section_flags (ranges_seg, (SEC_READONLY | |
2859 | | SEC_DEBUGGING | |
2860 | | SEC_OCTETS)); | |
2861 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
2862 | out_debug_ranges (ranges_seg, &ranges_sym); | |
2863 | } | |
2864 | else | |
2865 | { | |
2866 | segT rnglists_seg = subseg_new (".debug_rnglists", 0); | |
2867 | bfd_set_section_flags (rnglists_seg, (SEC_READONLY | |
2868 | | SEC_DEBUGGING | |
2869 | | SEC_OCTETS)); | |
2870 | out_debug_rnglists (rnglists_seg, &ranges_sym); | |
2871 | } | |
802f5d9e NC |
2872 | } |
2873 | ||
220e750f | 2874 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 2875 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
49fced12 | 2876 | out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym); |
bdd3b953 | 2877 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_sym, |
49fced12 | 2878 | name_sym, comp_dir_sym, producer_sym); |
220e750f | 2879 | } |
85a39694 | 2880 | } |
ba8826a8 AO |
2881 | |
2882 | /* Perform any deferred checks pertaining to debug information. */ | |
2883 | ||
2884 | void | |
2885 | dwarf2dbg_final_check (void) | |
2886 | { | |
2887 | /* Perform reset-view checks. Don't evaluate view_assert_failed | |
2888 | recursively: it could be very deep. It's a chain of adds, with | |
2889 | each chain element pointing to the next in X_add_symbol, and | |
2890 | holding the check value in X_op_symbol. */ | |
2891 | while (view_assert_failed) | |
2892 | { | |
723dfee7 | 2893 | expressionS *exp; |
ba8826a8 AO |
2894 | symbolS *sym; |
2895 | offsetT failed; | |
2896 | ||
2897 | gas_assert (!symbol_resolved_p (view_assert_failed)); | |
2898 | ||
723dfee7 | 2899 | exp = symbol_get_value_expression (view_assert_failed); |
ba8826a8 AO |
2900 | sym = view_assert_failed; |
2901 | ||
2902 | /* If view_assert_failed looks like a compound check in the | |
2903 | chain, break it up. */ | |
723dfee7 | 2904 | if (exp->X_op == O_add && exp->X_add_number == 0 && exp->X_unsigned) |
ba8826a8 | 2905 | { |
723dfee7 HPN |
2906 | view_assert_failed = exp->X_add_symbol; |
2907 | sym = exp->X_op_symbol; | |
ba8826a8 AO |
2908 | } |
2909 | else | |
2910 | view_assert_failed = NULL; | |
2911 | ||
2912 | failed = resolve_symbol_value (sym); | |
2913 | if (!symbol_resolved_p (sym) || failed) | |
2914 | { | |
2915 | as_bad (_("view number mismatch")); | |
2916 | break; | |
2917 | } | |
2918 | } | |
2919 | } |