Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
250d07de | 2 | Copyright (C) 1999-2021 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" |
42dbf88c | 33 | #include <limits.h> |
70658493 | 34 | #include "dwarf2dbg.h" |
a7ed1ca2 | 35 | #include <filenames.h> |
70658493 | 36 | |
56487c55 NC |
37 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
38 | /* We need to decide which character to use as a directory separator. | |
39 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
40 | necessarily mean that the backslash character is the one to use. | |
41 | Some environments, eg Cygwin, can support both naming conventions. | |
42 | So we use the heuristic that we only need to use the backslash if | |
43 | the path is an absolute path starting with a DOS style drive | |
44 | selector. eg C: or D: */ | |
45 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
46 | do \ | |
47 | { \ | |
48 | if (offset > 1 \ | |
7fd3924a AM |
49 | && string[0] != 0 \ |
50 | && string[1] == ':') \ | |
56487c55 NC |
51 | string [offset] = '\\'; \ |
52 | else \ | |
53 | string [offset] = '/'; \ | |
54 | } \ | |
55 | while (0) | |
56 | #else | |
57 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
58 | #endif | |
59 | ||
14e777e0 | 60 | #ifndef DWARF2_FORMAT |
413a266c | 61 | # define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
14e777e0 KB |
62 | #endif |
63 | ||
9605f328 | 64 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 65 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
66 | #endif |
67 | ||
01e1a5bc NC |
68 | #ifndef DWARF2_FILE_NAME |
69 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
70 | #endif | |
71 | ||
72 | #ifndef DWARF2_FILE_TIME_NAME | |
5496f3c6 | 73 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
74 | #endif |
75 | ||
76 | #ifndef DWARF2_FILE_SIZE_NAME | |
5496f3c6 | 77 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
78 | #endif |
79 | ||
fc0eebac | 80 | #ifndef DWARF2_VERSION |
31bf1864 | 81 | #define DWARF2_VERSION dwarf_level |
fc0eebac TG |
82 | #endif |
83 | ||
88ebb0a1 MW |
84 | /* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */ |
85 | #ifndef DWARF2_ARANGES_VERSION | |
86 | #define DWARF2_ARANGES_VERSION 2 | |
87 | #endif | |
88 | ||
8acbe8ff | 89 | /* This implementation outputs version 3 .debug_line information. */ |
88ebb0a1 | 90 | #ifndef DWARF2_LINE_VERSION |
5496f3c6 | 91 | #define DWARF2_LINE_VERSION (dwarf_level > 3 ? dwarf_level : 3) |
88ebb0a1 MW |
92 | #endif |
93 | ||
bdd3b953 MW |
94 | /* The .debug_rnglists has only been in DWARF version 5. */ |
95 | #ifndef DWARF2_RNGLISTS_VERSION | |
96 | #define DWARF2_RNGLISTS_VERSION 5 | |
97 | #endif | |
98 | ||
fac0d250 RH |
99 | #include "subsegs.h" |
100 | ||
fa8f86ff | 101 | #include "dwarf2.h" |
fac0d250 | 102 | |
fac0d250 RH |
103 | /* Since we can't generate the prolog until the body is complete, we |
104 | use three different subsegments for .debug_line: one holding the | |
105 | prolog, one for the directory and filename info, and one for the | |
106 | body ("statement program"). */ | |
107 | #define DL_PROLOG 0 | |
108 | #define DL_FILES 1 | |
109 | #define DL_BODY 2 | |
110 | ||
1737851b BW |
111 | /* If linker relaxation might change offsets in the code, the DWARF special |
112 | opcodes and variable-length operands cannot be used. If this macro is | |
113 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
114 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
453dc3f0 | 115 | # define DWARF2_USE_FIXED_ADVANCE_PC linkrelax |
1737851b BW |
116 | #endif |
117 | ||
33eaf5de | 118 | /* First special line opcode - leave room for the standard opcodes. |
fac0d250 RH |
119 | Note: If you want to change this, you'll have to update the |
120 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
121 | out_debug_line(). */ |
122 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
123 | |
124 | #ifndef DWARF2_LINE_BASE | |
125 | /* Minimum line offset in a special line info. opcode. This value | |
126 | was chosen to give a reasonable range of values. */ | |
127 | # define DWARF2_LINE_BASE -5 | |
128 | #endif | |
129 | ||
130 | /* Range of line offsets in a special line info. opcode. */ | |
131 | #ifndef DWARF2_LINE_RANGE | |
132 | # define DWARF2_LINE_RANGE 14 | |
133 | #endif | |
134 | ||
135 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
136 | /* Define the architecture-dependent minimum instruction length (in | |
137 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 138 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
139 | #endif |
140 | ||
bd0eb99b | 141 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
142 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
143 | ||
5496f3c6 NC |
144 | #ifndef DWARF2_LINE_MAX_OPS_PER_INSN |
145 | #define DWARF2_LINE_MAX_OPS_PER_INSN 1 | |
146 | #endif | |
147 | ||
cb30237e | 148 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
149 | #define SPECIAL_LINE(op) \ |
150 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
151 | ||
152 | /* Given a special op, return the address skip amount (in units of | |
153 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
154 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
155 | ||
cb30237e | 156 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
157 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
158 | ||
62ebcb5c AM |
159 | #ifndef TC_PARSE_CONS_RETURN_NONE |
160 | #define TC_PARSE_CONS_RETURN_NONE BFD_RELOC_NONE | |
161 | #endif | |
162 | ||
ba8826a8 AO |
163 | struct line_entry |
164 | { | |
220e750f | 165 | struct line_entry *next; |
07a53e5c | 166 | symbolS *label; |
220e750f | 167 | struct dwarf2_line_info loc; |
e6c774b4 | 168 | }; |
fac0d250 | 169 | |
ba8826a8 AO |
170 | /* Don't change the offset of next in line_entry. set_or_check_view |
171 | calls in dwarf2_gen_line_info_1 depend on it. */ | |
172 | static char unused[offsetof(struct line_entry, next) ? -1 : 1] | |
173 | ATTRIBUTE_UNUSED; | |
174 | ||
175 | struct line_subseg | |
176 | { | |
220e750f RH |
177 | struct line_subseg *next; |
178 | subsegT subseg; | |
179 | struct line_entry *head; | |
180 | struct line_entry **ptail; | |
e410add4 | 181 | struct line_entry **pmove_tail; |
220e750f | 182 | }; |
353e2c69 | 183 | |
ba8826a8 AO |
184 | struct line_seg |
185 | { | |
220e750f RH |
186 | struct line_seg *next; |
187 | segT seg; | |
188 | struct line_subseg *head; | |
189 | symbolS *text_start; | |
190 | symbolS *text_end; | |
191 | }; | |
192 | ||
193 | /* Collects data for all line table entries during assembly. */ | |
194 | static struct line_seg *all_segs; | |
1e9cc1c2 | 195 | static struct line_seg **last_seg_ptr; |
220e750f | 196 | |
5496f3c6 NC |
197 | #define NUM_MD5_BYTES 16 |
198 | ||
ba8826a8 AO |
199 | struct file_entry |
200 | { | |
5496f3c6 NC |
201 | const char * filename; |
202 | unsigned int dir; | |
203 | unsigned char md5[NUM_MD5_BYTES]; | |
220e750f RH |
204 | }; |
205 | ||
206 | /* Table of files used by .debug_line. */ | |
207 | static struct file_entry *files; | |
208 | static unsigned int files_in_use; | |
209 | static unsigned int files_allocated; | |
ae9d2233 | 210 | static unsigned int num_of_auto_assigned; |
220e750f | 211 | |
a7ed1ca2 | 212 | /* Table of directories used by .debug_line. */ |
5496f3c6 NC |
213 | static char ** dirs = NULL; |
214 | static unsigned int dirs_in_use = 0; | |
215 | static unsigned int dirs_allocated = 0; | |
a7ed1ca2 | 216 | |
b34976b6 | 217 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
edc7a80a MW |
218 | doing work when there's nothing to do. Will be reset by |
219 | dwarf2_consume_line_info. */ | |
5b7c81bd | 220 | bool dwarf2_loc_directive_seen; |
220e750f | 221 | |
edc7a80a MW |
222 | /* TRUE when we've seen any .loc directive at any time during parsing. |
223 | Indicates the user wants us to generate a .debug_line section. | |
224 | Used in dwarf2_finish as sanity check. */ | |
5b7c81bd | 225 | static bool dwarf2_any_loc_directive_seen; |
edc7a80a | 226 | |
07a53e5c RH |
227 | /* TRUE when we're supposed to set the basic block mark whenever a |
228 | label is seen. */ | |
5b7c81bd | 229 | bool dwarf2_loc_mark_labels; |
07a53e5c | 230 | |
220e750f | 231 | /* Current location as indicated by the most recent .loc directive. */ |
ba8826a8 AO |
232 | static struct dwarf2_line_info current = |
233 | { | |
bd0eb99b | 234 | 1, 1, 0, 0, |
92846e72 | 235 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
ba8826a8 | 236 | 0, NULL |
bd0eb99b | 237 | }; |
220e750f | 238 | |
ba8826a8 AO |
239 | /* This symbol is used to recognize view number forced resets in loc |
240 | lists. */ | |
241 | static symbolS *force_reset_view; | |
242 | ||
243 | /* This symbol evaluates to an expression that, if nonzero, indicates | |
244 | some view assert check failed. */ | |
245 | static symbolS *view_assert_failed; | |
246 | ||
220e750f RH |
247 | /* The size of an address on the target. */ |
248 | static unsigned int sizeof_address; | |
249 | \f | |
c5c0a210 | 250 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 251 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 252 | |
6174d9c8 RH |
253 | /* Create an offset to .dwarf2_*. */ |
254 | ||
255 | static void | |
a2e22468 | 256 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 257 | { |
91d6fa6a | 258 | expressionS exp; |
6174d9c8 | 259 | |
031e3350 | 260 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
261 | exp.X_op = O_symbol; |
262 | exp.X_add_symbol = symbol; | |
263 | exp.X_add_number = 0; | |
264 | emit_expr (&exp, size); | |
6174d9c8 | 265 | } |
c5c0a210 | 266 | #endif |
6174d9c8 | 267 | |
e410add4 | 268 | /* Find or create (if CREATE_P) an entry for SEG+SUBSEG in ALL_SEGS. */ |
220e750f RH |
269 | |
270 | static struct line_subseg * | |
5b7c81bd | 271 | get_line_subseg (segT seg, subsegT subseg, bool create_p) |
220e750f | 272 | { |
5f3fd8b4 | 273 | struct line_seg *s = seg_info (seg)->dwarf2_line_seg; |
91d6fa6a | 274 | struct line_subseg **pss, *lss; |
fac0d250 | 275 | |
1e9cc1c2 NC |
276 | if (s == NULL) |
277 | { | |
e410add4 RS |
278 | if (!create_p) |
279 | return NULL; | |
280 | ||
325801bd | 281 | s = XNEW (struct line_seg); |
1e9cc1c2 NC |
282 | s->next = NULL; |
283 | s->seg = seg; | |
284 | s->head = NULL; | |
285 | *last_seg_ptr = s; | |
286 | last_seg_ptr = &s->next; | |
5f3fd8b4 | 287 | seg_info (seg)->dwarf2_line_seg = s; |
1e9cc1c2 | 288 | } |
5496f3c6 | 289 | |
1e9cc1c2 | 290 | gas_assert (seg == s->seg); |
220e750f | 291 | |
91d6fa6a | 292 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 293 | { |
91d6fa6a | 294 | if (lss->subseg == subseg) |
ee515fb7 | 295 | goto found_subseg; |
91d6fa6a | 296 | if (lss->subseg > subseg) |
220e750f | 297 | break; |
fac0d250 | 298 | } |
220e750f | 299 | |
325801bd | 300 | lss = XNEW (struct line_subseg); |
91d6fa6a NC |
301 | lss->next = *pss; |
302 | lss->subseg = subseg; | |
303 | lss->head = NULL; | |
304 | lss->ptail = &lss->head; | |
e410add4 | 305 | lss->pmove_tail = &lss->head; |
91d6fa6a | 306 | *pss = lss; |
220e750f RH |
307 | |
308 | found_subseg: | |
91d6fa6a | 309 | return lss; |
fac0d250 RH |
310 | } |
311 | ||
ba8826a8 AO |
312 | /* (Un)reverse the line_entry list starting from H. */ |
313 | ||
314 | static struct line_entry * | |
315 | reverse_line_entry_list (struct line_entry *h) | |
316 | { | |
317 | struct line_entry *p = NULL, *e, *n; | |
318 | ||
319 | for (e = h; e; e = n) | |
320 | { | |
321 | n = e->next; | |
322 | e->next = p; | |
323 | p = e; | |
324 | } | |
325 | return p; | |
326 | } | |
327 | ||
328 | /* Compute the view for E based on the previous entry P. If we | |
329 | introduce an (undefined) view symbol for P, and H is given (P must | |
330 | be the tail in this case), introduce view symbols for earlier list | |
331 | entries as well, until one of them is constant. */ | |
332 | ||
333 | static void | |
334 | set_or_check_view (struct line_entry *e, struct line_entry *p, | |
335 | struct line_entry *h) | |
336 | { | |
337 | expressionS viewx; | |
338 | ||
339 | memset (&viewx, 0, sizeof (viewx)); | |
340 | viewx.X_unsigned = 1; | |
341 | ||
342 | /* First, compute !(E->label > P->label), to tell whether or not | |
343 | we're to reset the view number. If we can't resolve it to a | |
344 | constant, keep it symbolic. */ | |
345 | if (!p || (e->loc.view == force_reset_view && force_reset_view)) | |
346 | { | |
347 | viewx.X_op = O_constant; | |
348 | viewx.X_add_number = 0; | |
349 | viewx.X_add_symbol = NULL; | |
350 | viewx.X_op_symbol = NULL; | |
351 | } | |
352 | else | |
353 | { | |
354 | viewx.X_op = O_gt; | |
355 | viewx.X_add_number = 0; | |
356 | viewx.X_add_symbol = e->label; | |
357 | viewx.X_op_symbol = p->label; | |
358 | resolve_expression (&viewx); | |
359 | if (viewx.X_op == O_constant) | |
360 | viewx.X_add_number = !viewx.X_add_number; | |
361 | else | |
362 | { | |
363 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
364 | viewx.X_add_number = 0; | |
365 | viewx.X_op_symbol = NULL; | |
366 | viewx.X_op = O_logical_not; | |
367 | } | |
368 | } | |
369 | ||
370 | if (S_IS_DEFINED (e->loc.view) && symbol_constant_p (e->loc.view)) | |
371 | { | |
372 | expressionS *value = symbol_get_value_expression (e->loc.view); | |
373 | /* We can't compare the view numbers at this point, because in | |
374 | VIEWX we've only determined whether we're to reset it so | |
375 | far. */ | |
376 | if (viewx.X_op == O_constant) | |
377 | { | |
378 | if (!value->X_add_number != !viewx.X_add_number) | |
379 | as_bad (_("view number mismatch")); | |
380 | } | |
381 | /* Record the expression to check it later. It is the result of | |
382 | a logical not, thus 0 or 1. We just add up all such deferred | |
383 | expressions, and resolve it at the end. */ | |
384 | else if (!value->X_add_number) | |
385 | { | |
386 | symbolS *deferred = make_expr_symbol (&viewx); | |
387 | if (view_assert_failed) | |
388 | { | |
389 | expressionS chk; | |
031e3350 | 390 | |
ba8826a8 AO |
391 | memset (&chk, 0, sizeof (chk)); |
392 | chk.X_unsigned = 1; | |
393 | chk.X_op = O_add; | |
394 | chk.X_add_number = 0; | |
395 | chk.X_add_symbol = view_assert_failed; | |
396 | chk.X_op_symbol = deferred; | |
397 | deferred = make_expr_symbol (&chk); | |
398 | } | |
399 | view_assert_failed = deferred; | |
400 | } | |
401 | } | |
402 | ||
403 | if (viewx.X_op != O_constant || viewx.X_add_number) | |
404 | { | |
405 | expressionS incv; | |
406 | ||
407 | if (!p->loc.view) | |
408 | { | |
409 | p->loc.view = symbol_temp_make (); | |
410 | gas_assert (!S_IS_DEFINED (p->loc.view)); | |
411 | } | |
412 | ||
413 | memset (&incv, 0, sizeof (incv)); | |
414 | incv.X_unsigned = 1; | |
415 | incv.X_op = O_symbol; | |
416 | incv.X_add_symbol = p->loc.view; | |
417 | incv.X_add_number = 1; | |
418 | ||
419 | if (viewx.X_op == O_constant) | |
420 | { | |
421 | gas_assert (viewx.X_add_number == 1); | |
422 | viewx = incv; | |
423 | } | |
424 | else | |
425 | { | |
426 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
427 | viewx.X_add_number = 0; | |
428 | viewx.X_op_symbol = make_expr_symbol (&incv); | |
429 | viewx.X_op = O_multiply; | |
430 | } | |
431 | } | |
432 | ||
433 | if (!S_IS_DEFINED (e->loc.view)) | |
434 | { | |
435 | symbol_set_value_expression (e->loc.view, &viewx); | |
38cf168b | 436 | S_SET_SEGMENT (e->loc.view, expr_section); |
ba8826a8 AO |
437 | symbol_set_frag (e->loc.view, &zero_address_frag); |
438 | } | |
439 | ||
440 | /* Define and attempt to simplify any earlier views needed to | |
441 | compute E's. */ | |
442 | if (h && p && p->loc.view && !S_IS_DEFINED (p->loc.view)) | |
443 | { | |
444 | struct line_entry *h2; | |
445 | /* Reverse the list to avoid quadratic behavior going backwards | |
446 | in a single-linked list. */ | |
447 | struct line_entry *r = reverse_line_entry_list (h); | |
448 | ||
449 | gas_assert (r == p); | |
450 | /* Set or check views until we find a defined or absent view. */ | |
451 | do | |
62e6b7b3 AO |
452 | { |
453 | /* Do not define the head of a (sub?)segment view while | |
454 | handling others. It would be defined too early, without | |
455 | regard to the last view of other subsegments. | |
456 | set_or_check_view will be called for every head segment | |
457 | that needs it. */ | |
458 | if (r == h) | |
459 | break; | |
460 | set_or_check_view (r, r->next, NULL); | |
461 | } | |
ba8826a8 AO |
462 | while (r->next && r->next->loc.view && !S_IS_DEFINED (r->next->loc.view) |
463 | && (r = r->next)); | |
464 | ||
465 | /* Unreverse the list, so that we can go forward again. */ | |
466 | h2 = reverse_line_entry_list (p); | |
467 | gas_assert (h2 == h); | |
468 | ||
469 | /* Starting from the last view we just defined, attempt to | |
470 | simplify the view expressions, until we do so to P. */ | |
471 | do | |
472 | { | |
62e6b7b3 AO |
473 | /* The head view of a subsegment may remain undefined while |
474 | handling other elements, before it is linked to the last | |
475 | view of the previous subsegment. */ | |
476 | if (r == h) | |
477 | continue; | |
ba8826a8 AO |
478 | gas_assert (S_IS_DEFINED (r->loc.view)); |
479 | resolve_expression (symbol_get_value_expression (r->loc.view)); | |
480 | } | |
481 | while (r != p && (r = r->next)); | |
482 | ||
483 | /* Now that we've defined and computed all earlier views that might | |
484 | be needed to compute E's, attempt to simplify it. */ | |
485 | resolve_expression (symbol_get_value_expression (e->loc.view)); | |
486 | } | |
487 | } | |
488 | ||
6a50d470 | 489 | /* Record an entry for LOC occurring at LABEL. */ |
07a53e5c RH |
490 | |
491 | static void | |
6a50d470 | 492 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) |
07a53e5c | 493 | { |
6a50d470 | 494 | struct line_subseg *lss; |
07a53e5c | 495 | struct line_entry *e; |
058430b4 | 496 | flagword need_flags = SEC_LOAD | SEC_CODE; |
bcb78b47 | 497 | |
058430b4 AM |
498 | /* PR 26850: Do not record LOCs in non-executable or non-loaded |
499 | sections. SEC_ALLOC isn't tested for non-ELF because obj-coff.c | |
500 | obj_coff_section is careless in setting SEC_ALLOC. */ | |
501 | if (IS_ELF) | |
502 | need_flags |= SEC_ALLOC; | |
bcb78b47 NC |
503 | if ((now_seg->flags & need_flags) != need_flags) |
504 | { | |
058430b4 | 505 | /* FIXME: Add code to suppress multiple warnings ? */ |
be07043e AM |
506 | if (debug_type != DEBUG_DWARF2) |
507 | as_warn ("dwarf line number information for %s ignored", | |
508 | segment_name (now_seg)); | |
bcb78b47 NC |
509 | return; |
510 | } | |
07a53e5c | 511 | |
325801bd | 512 | e = XNEW (struct line_entry); |
07a53e5c | 513 | e->next = NULL; |
6a50d470 | 514 | e->label = label; |
07a53e5c RH |
515 | e->loc = *loc; |
516 | ||
5b7c81bd | 517 | lss = get_line_subseg (now_seg, now_subseg, true); |
ba8826a8 | 518 | |
62e6b7b3 AO |
519 | /* Subseg heads are chained to previous subsegs in |
520 | dwarf2_finish. */ | |
521 | if (loc->view && lss->head) | |
ba8826a8 | 522 | set_or_check_view (e, |
62e6b7b3 | 523 | (struct line_entry *)lss->ptail, |
ba8826a8 AO |
524 | lss->head); |
525 | ||
6a50d470 RS |
526 | *lss->ptail = e; |
527 | lss->ptail = &e->next; | |
07a53e5c RH |
528 | } |
529 | ||
436d9e46 | 530 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 531 | |
220e750f | 532 | void |
a2e22468 | 533 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 534 | { |
1ea5c325 MS |
535 | static unsigned int line = -1; |
536 | static unsigned int filenum = -1; | |
220e750f | 537 | |
6a50d470 RS |
538 | symbolS *sym; |
539 | ||
220e750f | 540 | /* Early out for as-yet incomplete location information. */ |
5496f3c6 NC |
541 | if (loc->line == 0) |
542 | return; | |
498ff032 | 543 | if (loc->filenum == 0) |
705989f1 | 544 | { |
498ff032 AM |
545 | if (dwarf_level < 5) |
546 | dwarf_level = 5; | |
705989f1 L |
547 | if (DWARF2_LINE_VERSION < 5) |
548 | return; | |
549 | } | |
220e750f | 550 | |
ffa554ed GK |
551 | /* Don't emit sequences of line symbols for the same line when the |
552 | symbols apply to assembler code. It is necessary to emit | |
553 | duplicate line symbols when a compiler asks for them, because GDB | |
554 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 555 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 556 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
557 | return; |
558 | ||
559 | line = loc->line; | |
560 | filenum = loc->filenum; | |
561 | ||
453dc3f0 NC |
562 | if (linkrelax) |
563 | { | |
564 | char name[120]; | |
565 | ||
566 | /* Use a non-fake name for the line number location, | |
567 | so that it can be referred to by relocations. */ | |
568 | sprintf (name, ".Loc.%u.%u", line, filenum); | |
e01e1cee | 569 | sym = symbol_new (name, now_seg, frag_now, ofs); |
453dc3f0 NC |
570 | } |
571 | else | |
e01e1cee | 572 | sym = symbol_temp_new (now_seg, frag_now, ofs); |
6a50d470 | 573 | dwarf2_gen_line_info_1 (sym, loc); |
220e750f | 574 | } |
fac0d250 | 575 | |
5496f3c6 NC |
576 | static const char * |
577 | get_basename (const char * pathname) | |
578 | { | |
579 | const char * file; | |
580 | ||
581 | file = lbasename (pathname); | |
582 | /* Don't make empty string from / or A: from A:/ . */ | |
583 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
584 | if (file <= pathname + 3) | |
585 | file = pathname; | |
586 | #else | |
587 | if (file == pathname + 1) | |
588 | file = pathname; | |
589 | #endif | |
590 | return file; | |
591 | } | |
592 | ||
593 | static unsigned int | |
5b7c81bd AM |
594 | get_directory_table_entry (const char *dirname, |
595 | size_t dirlen, | |
596 | bool can_use_zero) | |
5496f3c6 NC |
597 | { |
598 | unsigned int d; | |
599 | ||
600 | if (dirlen == 0) | |
601 | return 0; | |
602 | ||
603 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR | |
604 | if (IS_DIR_SEPARATOR (dirname[dirlen - 1])) | |
605 | { | |
606 | -- dirlen; | |
607 | if (dirlen == 0) | |
608 | return 0; | |
609 | } | |
610 | #endif | |
611 | ||
612 | for (d = 0; d < dirs_in_use; ++d) | |
613 | { | |
614 | if (dirs[d] != NULL | |
615 | && filename_ncmp (dirname, dirs[d], dirlen) == 0 | |
616 | && dirs[d][dirlen] == '\0') | |
617 | return d; | |
618 | } | |
619 | ||
620 | if (can_use_zero) | |
621 | { | |
622 | if (dirs == NULL || dirs[0] == NULL) | |
623 | d = 0; | |
624 | } | |
625 | else if (d == 0) | |
626 | d = 1; | |
627 | ||
628 | if (d >= dirs_allocated) | |
629 | { | |
630 | unsigned int old = dirs_allocated; | |
631 | ||
632 | dirs_allocated = d + 32; | |
633 | dirs = XRESIZEVEC (char *, dirs, dirs_allocated); | |
634 | memset (dirs + old, 0, (dirs_allocated - old) * sizeof (char *)); | |
635 | } | |
636 | ||
637 | dirs[d] = xmemdup0 (dirname, dirlen); | |
638 | if (dirs_in_use <= d) | |
639 | dirs_in_use = d + 1; | |
640 | ||
641 | return d; | |
642 | } | |
643 | ||
5b7c81bd | 644 | static bool |
6915020b | 645 | assign_file_to_slot (unsigned long i, const char *file, unsigned int dir) |
714e6c96 NC |
646 | { |
647 | if (i >= files_allocated) | |
648 | { | |
649 | unsigned int old = files_allocated; | |
650 | ||
651 | files_allocated = i + 32; | |
652 | /* Catch wraparound. */ | |
653 | if (files_allocated <= old) | |
654 | { | |
655 | as_bad (_("file number %lu is too big"), (unsigned long) i); | |
5b7c81bd | 656 | return false; |
714e6c96 NC |
657 | } |
658 | ||
659 | files = XRESIZEVEC (struct file_entry, files, files_allocated); | |
660 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
661 | } | |
662 | ||
663 | files[i].filename = file; | |
664 | files[i].dir = dir; | |
714e6c96 NC |
665 | memset (files[i].md5, 0, NUM_MD5_BYTES); |
666 | ||
667 | if (files_in_use < i + 1) | |
668 | files_in_use = i + 1; | |
669 | ||
5b7c81bd | 670 | return true; |
714e6c96 NC |
671 | } |
672 | ||
5496f3c6 NC |
673 | /* Get a .debug_line file number for PATHNAME. If there is a |
674 | directory component to PATHNAME, then this will be stored | |
675 | in the directory table, if it is not already present. | |
676 | Returns the slot number allocated to that filename or -1 | |
677 | if there was a problem. */ | |
678 | ||
679 | static signed int | |
680 | allocate_filenum (const char * pathname) | |
681 | { | |
682 | static signed int last_used = -1, last_used_dir_len = 0; | |
683 | const char *file; | |
684 | size_t dir_len; | |
685 | unsigned int i, dir; | |
686 | ||
687 | /* Short circuit the common case of adding the same pathname | |
688 | as last time. */ | |
689 | if (last_used != -1) | |
690 | { | |
691 | const char * dirname = NULL; | |
692 | ||
693 | if (dirs != NULL) | |
694 | dirname = dirs[files[last_used].dir]; | |
695 | ||
696 | if (dirname == NULL) | |
697 | { | |
698 | if (filename_cmp (pathname, files[last_used].filename) == 0) | |
699 | return last_used; | |
700 | } | |
701 | else | |
702 | { | |
703 | if (filename_ncmp (pathname, dirname, last_used_dir_len) == 0 | |
704 | && IS_DIR_SEPARATOR (pathname [last_used_dir_len]) | |
705 | && filename_cmp (pathname + last_used_dir_len + 1, | |
706 | files[last_used].filename) == 0) | |
707 | return last_used; | |
708 | } | |
709 | } | |
710 | ||
711 | file = get_basename (pathname); | |
712 | dir_len = file - pathname; | |
713 | ||
5b7c81bd | 714 | dir = get_directory_table_entry (pathname, dir_len, false); |
5496f3c6 | 715 | |
714e6c96 | 716 | /* Do not use slot-0. That is specifically reserved for use by |
5496f3c6 NC |
717 | the '.file 0 "name"' directive. */ |
718 | for (i = 1; i < files_in_use; ++i) | |
719 | if (files[i].dir == dir | |
720 | && files[i].filename | |
721 | && filename_cmp (file, files[i].filename) == 0) | |
722 | { | |
723 | last_used = i; | |
724 | last_used_dir_len = dir_len; | |
725 | return i; | |
726 | } | |
727 | ||
6915020b | 728 | if (!assign_file_to_slot (i, file, dir)) |
714e6c96 | 729 | return -1; |
5496f3c6 | 730 | |
ae9d2233 L |
731 | num_of_auto_assigned++; |
732 | ||
5496f3c6 NC |
733 | last_used = i; |
734 | last_used_dir_len = dir_len; | |
735 | ||
736 | return i; | |
737 | } | |
738 | ||
739 | /* Allocate slot NUM in the .debug_line file table to FILENAME. | |
740 | If DIRNAME is not NULL or there is a directory component to FILENAME | |
741 | then this will be stored in the directory table, if not already present. | |
742 | if WITH_MD5 is TRUE then there is a md5 value in generic_bignum. | |
743 | Returns TRUE if allocation succeeded, FALSE otherwise. */ | |
744 | ||
5b7c81bd AM |
745 | static bool |
746 | allocate_filename_to_slot (const char *dirname, | |
747 | const char *filename, | |
748 | unsigned int num, | |
749 | bool with_md5) | |
5496f3c6 NC |
750 | { |
751 | const char *file; | |
752 | size_t dirlen; | |
753 | unsigned int i, d; | |
754 | ||
755 | /* Short circuit the common case of adding the same pathname | |
756 | as last time. */ | |
757 | if (num < files_allocated && files[num].filename != NULL) | |
758 | { | |
759 | const char * dir = NULL; | |
760 | ||
80b652ef | 761 | if (dirs != NULL) |
5496f3c6 NC |
762 | dir = dirs[files[num].dir]; |
763 | ||
764 | if (with_md5 | |
765 | && memcmp (generic_bignum, files[num].md5, NUM_MD5_BYTES) != 0) | |
766 | goto fail; | |
767 | ||
768 | if (dirname != NULL) | |
769 | { | |
770 | if (dir != NULL && filename_cmp (dir, dirname) != 0) | |
771 | goto fail; | |
772 | ||
773 | if (filename_cmp (filename, files[num].filename) != 0) | |
774 | goto fail; | |
775 | ||
776 | /* If the filenames match, but the directory table entry was | |
777 | empty, then fill it with the provided directory name. */ | |
778 | if (dir == NULL) | |
80b652ef NC |
779 | { |
780 | if (dirs == NULL) | |
781 | { | |
782 | dirs_allocated = files[num].dir + 32; | |
783 | dirs = XCNEWVEC (char *, dirs_allocated); | |
784 | } | |
785 | ||
786 | dirs[files[num].dir] = xmemdup0 (dirname, strlen (dirname)); | |
787 | } | |
5496f3c6 | 788 | |
5b7c81bd | 789 | return true; |
5496f3c6 NC |
790 | } |
791 | else if (dir != NULL) | |
792 | { | |
793 | dirlen = strlen (dir); | |
794 | if (filename_ncmp (filename, dir, dirlen) == 0 | |
795 | && IS_DIR_SEPARATOR (filename [dirlen]) | |
796 | && filename_cmp (filename + dirlen + 1, files[num].filename) == 0) | |
5b7c81bd | 797 | return true; |
5496f3c6 NC |
798 | } |
799 | else /* dir == NULL */ | |
800 | { | |
801 | file = get_basename (filename); | |
802 | if (filename_cmp (file, files[num].filename) == 0) | |
803 | { | |
9a12b194 AM |
804 | /* The filenames match, but the directory table entry is empty. |
805 | Fill it with the provided directory name. */ | |
5496f3c6 | 806 | if (file > filename) |
9a12b194 AM |
807 | { |
808 | if (dirs == NULL) | |
809 | { | |
810 | dirs_allocated = files[num].dir + 32; | |
811 | dirs = XCNEWVEC (char *, dirs_allocated); | |
812 | } | |
813 | ||
814 | dirs[files[num].dir] = xmemdup0 (filename, file - filename); | |
815 | } | |
5b7c81bd | 816 | return true; |
5496f3c6 NC |
817 | } |
818 | } | |
819 | ||
820 | fail: | |
bd0c565e L |
821 | as_bad (_("file table slot %u is already occupied by a different file (%s%s%s vs %s%s%s)"), |
822 | num, | |
823 | dir == NULL ? "" : dir, | |
824 | dir == NULL ? "" : "/", | |
825 | files[num].filename, | |
826 | dirname == NULL ? "" : dirname, | |
827 | dirname == NULL ? "" : "/", | |
828 | filename); | |
5b7c81bd | 829 | return false; |
5496f3c6 NC |
830 | } |
831 | ||
832 | if (dirname == NULL) | |
833 | { | |
834 | dirname = filename; | |
835 | file = get_basename (filename); | |
836 | dirlen = file - filename; | |
837 | } | |
838 | else | |
839 | { | |
840 | dirlen = strlen (dirname); | |
841 | file = filename; | |
842 | } | |
843 | ||
844 | d = get_directory_table_entry (dirname, dirlen, num == 0); | |
845 | i = num; | |
846 | ||
6915020b | 847 | if (! assign_file_to_slot (i, file, d)) |
5b7c81bd | 848 | return false; |
5496f3c6 | 849 | |
5496f3c6 NC |
850 | if (with_md5) |
851 | { | |
852 | if (target_big_endian) | |
853 | { | |
854 | /* md5's are stored in litte endian format. */ | |
855 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
856 | unsigned int byte = NUM_MD5_BYTES; | |
857 | unsigned int bignum_index = 0; | |
858 | ||
859 | while (bits_remaining) | |
860 | { | |
861 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
862 | valueT bignum_value = generic_bignum [bignum_index]; | |
863 | bignum_index ++; | |
864 | ||
865 | while (bignum_bits_remaining) | |
866 | { | |
867 | files[i].md5[--byte] = bignum_value & 0xff; | |
868 | bignum_value >>= 8; | |
869 | bignum_bits_remaining -= 8; | |
870 | bits_remaining -= 8; | |
871 | } | |
872 | } | |
873 | } | |
874 | else | |
875 | { | |
876 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
877 | unsigned int byte = 0; | |
878 | unsigned int bignum_index = 0; | |
879 | ||
880 | while (bits_remaining) | |
881 | { | |
882 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
883 | valueT bignum_value = generic_bignum [bignum_index]; | |
884 | ||
885 | bignum_index ++; | |
886 | ||
887 | while (bignum_bits_remaining) | |
888 | { | |
889 | files[i].md5[byte++] = bignum_value & 0xff; | |
890 | bignum_value >>= 8; | |
891 | bignum_bits_remaining -= 8; | |
892 | bits_remaining -= 8; | |
893 | } | |
894 | } | |
895 | } | |
896 | } | |
897 | else | |
898 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
899 | ||
5b7c81bd | 900 | return true; |
5496f3c6 NC |
901 | } |
902 | ||
ecea7679 RH |
903 | /* Returns the current source information. If .file directives have |
904 | been encountered, the info for the corresponding source file is | |
905 | returned. Otherwise, the info for the assembly source file is | |
906 | returned. */ | |
907 | ||
220e750f | 908 | void |
a2e22468 | 909 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
910 | { |
911 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 912 | { |
ba8826a8 AO |
913 | const char *filename; |
914 | ||
915 | memset (line, 0, sizeof (*line)); | |
bd0c565e | 916 | filename = as_where (&line->line); |
5496f3c6 NC |
917 | line->filenum = allocate_filenum (filename); |
918 | /* FIXME: We should check the return value from allocate_filenum. */ | |
220e750f | 919 | line->column = 0; |
bd0eb99b | 920 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 921 | line->isa = current.isa; |
92846e72 | 922 | line->discriminator = current.discriminator; |
ba8826a8 | 923 | line->view = NULL; |
fac0d250 | 924 | } |
220e750f RH |
925 | else |
926 | *line = current; | |
fac0d250 RH |
927 | } |
928 | ||
7fd3924a | 929 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
930 | machine of isa changes when assembler debug info is enabled. */ |
931 | ||
932 | void | |
933 | dwarf2_set_isa (unsigned int isa) | |
934 | { | |
935 | current.isa = isa; | |
936 | } | |
937 | ||
220e750f RH |
938 | /* Called for each machine instruction, or relatively atomic group of |
939 | machine instructions (ie built-in macro). The instruction or group | |
940 | is SIZE bytes in length. If dwarf2 line number generation is called | |
941 | for, emit a line statement appropriately. */ | |
353e2c69 | 942 | |
220e750f | 943 | void |
a2e22468 | 944 | dwarf2_emit_insn (int size) |
fac0d250 | 945 | { |
220e750f | 946 | struct dwarf2_line_info loc; |
fac0d250 | 947 | |
ba8826a8 AO |
948 | if (debug_type != DEBUG_DWARF2 |
949 | ? !dwarf2_loc_directive_seen | |
950 | : !seen_at_least_1_file ()) | |
220e750f | 951 | return; |
7fd3924a AM |
952 | |
953 | dwarf2_where (&loc); | |
b6675117 | 954 | |
71250b94 | 955 | dwarf2_gen_line_info ((frag_now_fix_octets () - size) / OCTETS_PER_BYTE, &loc); |
661ba50f BW |
956 | dwarf2_consume_line_info (); |
957 | } | |
958 | ||
e410add4 RS |
959 | /* Move all previously-emitted line entries for the current position by |
960 | DELTA bytes. This function cannot be used to move the same entries | |
961 | twice. */ | |
962 | ||
963 | void | |
964 | dwarf2_move_insn (int delta) | |
965 | { | |
966 | struct line_subseg *lss; | |
967 | struct line_entry *e; | |
968 | valueT now; | |
969 | ||
970 | if (delta == 0) | |
971 | return; | |
972 | ||
5b7c81bd | 973 | lss = get_line_subseg (now_seg, now_subseg, false); |
e410add4 RS |
974 | if (!lss) |
975 | return; | |
976 | ||
977 | now = frag_now_fix (); | |
978 | while ((e = *lss->pmove_tail)) | |
979 | { | |
980 | if (S_GET_VALUE (e->label) == now) | |
981 | S_SET_VALUE (e->label, now + delta); | |
982 | lss->pmove_tail = &e->next; | |
983 | } | |
984 | } | |
985 | ||
661ba50f BW |
986 | /* Called after the current line information has been either used with |
987 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
988 | This resets the state of the line number information to reflect that | |
989 | it has been used. */ | |
990 | ||
991 | void | |
992 | dwarf2_consume_line_info (void) | |
993 | { | |
994 | /* Unless we generate DWARF2 debugging information for each | |
995 | assembler line, we only emit one line symbol for one LOC. */ | |
5b7c81bd | 996 | dwarf2_loc_directive_seen = false; |
bd0eb99b RH |
997 | |
998 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
999 | | DWARF2_FLAG_PROLOGUE_END | |
1000 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 1001 | current.discriminator = 0; |
3a00b02d | 1002 | current.view = NULL; |
220e750f | 1003 | } |
fac0d250 | 1004 | |
07a53e5c RH |
1005 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
1006 | is enabled, emit a basic block marker. */ | |
1007 | ||
1008 | void | |
1009 | dwarf2_emit_label (symbolS *label) | |
1010 | { | |
1011 | struct dwarf2_line_info loc; | |
1012 | ||
1013 | if (!dwarf2_loc_mark_labels) | |
1014 | return; | |
1015 | if (S_GET_SEGMENT (label) != now_seg) | |
1016 | return; | |
fd361982 | 1017 | if (!(bfd_section_flags (now_seg) & SEC_CODE)) |
07a53e5c | 1018 | return; |
7fd3924a AM |
1019 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
1020 | return; | |
1021 | ||
1022 | dwarf2_where (&loc); | |
07a53e5c RH |
1023 | |
1024 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1025 | ||
6a50d470 | 1026 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 1027 | dwarf2_consume_line_info (); |
07a53e5c RH |
1028 | } |
1029 | ||
ecb4347a DJ |
1030 | /* Handle two forms of .file directive: |
1031 | - Pass .file "source.c" to s_app_file | |
1032 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 1033 | |
68d20676 | 1034 | If an entry is added to the file table, return a pointer to the filename. */ |
ecb4347a DJ |
1035 | |
1036 | char * | |
68d20676 | 1037 | dwarf2_directive_filename (void) |
220e750f | 1038 | { |
5b7c81bd | 1039 | bool with_md5 = false; |
8f02ae5b | 1040 | valueT num; |
e46d99eb | 1041 | char *filename; |
5496f3c6 | 1042 | const char * dirname = NULL; |
220e750f | 1043 | int filename_len; |
ae9d2233 | 1044 | unsigned int i; |
220e750f RH |
1045 | |
1046 | /* Continue to accept a bare string and pass it off. */ | |
1047 | SKIP_WHITESPACE (); | |
1048 | if (*input_line_pointer == '"') | |
fac0d250 | 1049 | { |
220e750f | 1050 | s_app_file (0); |
ecb4347a | 1051 | return NULL; |
fac0d250 RH |
1052 | } |
1053 | ||
220e750f | 1054 | num = get_absolute_expression (); |
220e750f | 1055 | |
498ff032 | 1056 | if ((offsetT) num < 1) |
fac0d250 | 1057 | { |
498ff032 AM |
1058 | if (num == 0 && dwarf_level < 5) |
1059 | dwarf_level = 5; | |
1060 | if ((offsetT) num < 0 || DWARF2_LINE_VERSION < 5) | |
705989f1 L |
1061 | { |
1062 | as_bad (_("file number less than one")); | |
1063 | ignore_rest_of_line (); | |
1064 | return NULL; | |
1065 | } | |
fac0d250 RH |
1066 | } |
1067 | ||
5496f3c6 NC |
1068 | /* FIXME: Should we allow ".file <N>\n" as an expression meaning |
1069 | "switch back to the already allocated file <N> as the current | |
1070 | file" ? */ | |
84d9ab33 NC |
1071 | |
1072 | filename = demand_copy_C_string (&filename_len); | |
1073 | if (filename == NULL) | |
1074 | /* demand_copy_C_string will have already generated an error message. */ | |
1075 | return NULL; | |
1076 | ||
5496f3c6 NC |
1077 | /* For DWARF-5 support we also accept: |
1078 | .file <NUM> ["<dir>"] "<file>" [md5 <NUM>] */ | |
1079 | if (DWARF2_LINE_VERSION > 4) | |
1080 | { | |
1081 | SKIP_WHITESPACE (); | |
1082 | if (*input_line_pointer == '"') | |
1083 | { | |
1084 | dirname = filename; | |
1085 | filename = demand_copy_C_string (&filename_len); | |
1086 | SKIP_WHITESPACE (); | |
1087 | } | |
1088 | ||
d34049e8 | 1089 | if (startswith (input_line_pointer, "md5")) |
5496f3c6 NC |
1090 | { |
1091 | input_line_pointer += 3; | |
1092 | SKIP_WHITESPACE (); | |
1093 | ||
1094 | expressionS exp; | |
1095 | expression_and_evaluate (& exp); | |
1096 | if (exp.X_op != O_big) | |
1097 | as_bad (_("md5 value too small or not a constant")); | |
1098 | else | |
5b7c81bd | 1099 | with_md5 = true; |
5496f3c6 NC |
1100 | } |
1101 | } | |
1102 | ||
84d9ab33 NC |
1103 | demand_empty_rest_of_line (); |
1104 | ||
7cadeb2c AM |
1105 | /* A .file directive implies compiler generated debug information is |
1106 | being supplied. Turn off gas generated debug info. */ | |
1107 | debug_type = DEBUG_NONE; | |
1108 | ||
8f02ae5b AM |
1109 | if (num != (unsigned int) num |
1110 | || num >= (size_t) -1 / sizeof (struct file_entry) - 32) | |
220e750f | 1111 | { |
8f02ae5b | 1112 | as_bad (_("file number %lu is too big"), (unsigned long) num); |
ecb4347a | 1113 | return NULL; |
249e3833 | 1114 | } |
220e750f | 1115 | |
ae9d2233 | 1116 | if (num_of_auto_assigned) |
bd0c565e | 1117 | { |
ae9d2233 L |
1118 | /* Clear slots auto-assigned before the first .file <NUMBER> |
1119 | directive was seen. */ | |
1120 | if (files_in_use != (num_of_auto_assigned + 1)) | |
1121 | abort (); | |
1122 | for (i = 1; i < files_in_use; i++) | |
1123 | files[i].filename = NULL; | |
1124 | files_in_use = 0; | |
1125 | num_of_auto_assigned = 0; | |
bd0c565e L |
1126 | } |
1127 | ||
5496f3c6 NC |
1128 | if (! allocate_filename_to_slot (dirname, filename, (unsigned int) num, |
1129 | with_md5)) | |
1130 | return NULL; | |
ecb4347a DJ |
1131 | |
1132 | return filename; | |
fac0d250 RH |
1133 | } |
1134 | ||
68d20676 NC |
1135 | /* Calls dwarf2_directive_filename, but discards its result. |
1136 | Used in pseudo-op tables where the function result is ignored. */ | |
1137 | ||
1138 | void | |
1139 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) | |
1140 | { | |
1141 | (void) dwarf2_directive_filename (); | |
1142 | } | |
1143 | ||
220e750f | 1144 | void |
a2e22468 | 1145 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 1146 | { |
ecea7679 RH |
1147 | offsetT filenum, line; |
1148 | ||
851feff8 DJ |
1149 | /* If we see two .loc directives in a row, force the first one to be |
1150 | output now. */ | |
7cadeb2c | 1151 | if (dwarf2_loc_directive_seen) |
6a50d470 | 1152 | dwarf2_emit_insn (0); |
851feff8 | 1153 | |
ecea7679 RH |
1154 | filenum = get_absolute_expression (); |
1155 | SKIP_WHITESPACE (); | |
1156 | line = get_absolute_expression (); | |
1157 | ||
1158 | if (filenum < 1) | |
1159 | { | |
498ff032 AM |
1160 | if (filenum == 0 && dwarf_level < 5) |
1161 | dwarf_level = 5; | |
1162 | if (filenum < 0 || DWARF2_LINE_VERSION < 5) | |
5496f3c6 | 1163 | { |
498ff032 AM |
1164 | as_bad (_("file number less than one")); |
1165 | return; | |
5496f3c6 | 1166 | } |
ecea7679 | 1167 | } |
5496f3c6 | 1168 | |
498ff032 | 1169 | if ((valueT) filenum >= files_in_use || files[filenum].filename == NULL) |
ecea7679 RH |
1170 | { |
1171 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
1172 | return; | |
1173 | } | |
1174 | ||
1175 | current.filenum = filenum; | |
1176 | current.line = line; | |
92846e72 | 1177 | current.discriminator = 0; |
ecea7679 RH |
1178 | |
1179 | #ifndef NO_LISTING | |
1180 | if (listing) | |
1181 | { | |
1182 | if (files[filenum].dir) | |
1183 | { | |
1184 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
1185 | size_t file_len = strlen (files[filenum].filename); | |
add39d23 | 1186 | char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1); |
ecea7679 RH |
1187 | |
1188 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 1189 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
1190 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
1191 | cp[dir_len + file_len + 1] = '\0'; | |
1192 | listing_source_file (cp); | |
e1fa0163 | 1193 | free (cp); |
ecea7679 RH |
1194 | } |
1195 | else | |
1196 | listing_source_file (files[filenum].filename); | |
1197 | listing_source_line (line); | |
1198 | } | |
1199 | #endif | |
1200 | ||
220e750f | 1201 | SKIP_WHITESPACE (); |
ecea7679 RH |
1202 | if (ISDIGIT (*input_line_pointer)) |
1203 | { | |
1204 | current.column = get_absolute_expression (); | |
1205 | SKIP_WHITESPACE (); | |
1206 | } | |
1207 | ||
1208 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 1209 | { |
bd0eb99b RH |
1210 | char *p, c; |
1211 | offsetT value; | |
1212 | ||
d02603dc | 1213 | c = get_symbol_name (& p); |
bd0eb99b RH |
1214 | |
1215 | if (strcmp (p, "basic_block") == 0) | |
1216 | { | |
1217 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1218 | *input_line_pointer = c; | |
1219 | } | |
1220 | else if (strcmp (p, "prologue_end") == 0) | |
1221 | { | |
1222 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
1223 | *input_line_pointer = c; | |
1224 | } | |
1225 | else if (strcmp (p, "epilogue_begin") == 0) | |
1226 | { | |
1227 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
1228 | *input_line_pointer = c; | |
1229 | } | |
1230 | else if (strcmp (p, "is_stmt") == 0) | |
1231 | { | |
d02603dc | 1232 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1233 | value = get_absolute_expression (); |
1234 | if (value == 0) | |
1235 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
1236 | else if (value == 1) | |
1237 | current.flags |= DWARF2_FLAG_IS_STMT; | |
1238 | else | |
ecea7679 RH |
1239 | { |
1240 | as_bad (_("is_stmt value not 0 or 1")); | |
1241 | return; | |
1242 | } | |
bd0eb99b RH |
1243 | } |
1244 | else if (strcmp (p, "isa") == 0) | |
1245 | { | |
d02603dc | 1246 | (void) restore_line_pointer (c); |
bd0eb99b | 1247 | value = get_absolute_expression (); |
ecea7679 | 1248 | if (value >= 0) |
bd0eb99b | 1249 | current.isa = value; |
ecea7679 RH |
1250 | else |
1251 | { | |
1252 | as_bad (_("isa number less than zero")); | |
1253 | return; | |
1254 | } | |
bd0eb99b | 1255 | } |
92846e72 CC |
1256 | else if (strcmp (p, "discriminator") == 0) |
1257 | { | |
d02603dc | 1258 | (void) restore_line_pointer (c); |
92846e72 CC |
1259 | value = get_absolute_expression (); |
1260 | if (value >= 0) | |
1261 | current.discriminator = value; | |
1262 | else | |
1263 | { | |
1264 | as_bad (_("discriminator less than zero")); | |
1265 | return; | |
1266 | } | |
1267 | } | |
ba8826a8 AO |
1268 | else if (strcmp (p, "view") == 0) |
1269 | { | |
1270 | symbolS *sym; | |
1271 | ||
1272 | (void) restore_line_pointer (c); | |
1273 | SKIP_WHITESPACE (); | |
1274 | ||
1275 | if (ISDIGIT (*input_line_pointer) | |
1276 | || *input_line_pointer == '-') | |
1277 | { | |
5b7c81bd | 1278 | bool force_reset = *input_line_pointer == '-'; |
ba8826a8 AO |
1279 | |
1280 | value = get_absolute_expression (); | |
1281 | if (value != 0) | |
1282 | { | |
1283 | as_bad (_("numeric view can only be asserted to zero")); | |
1284 | return; | |
1285 | } | |
1286 | if (force_reset && force_reset_view) | |
1287 | sym = force_reset_view; | |
1288 | else | |
1289 | { | |
e01e1cee AM |
1290 | sym = symbol_temp_new (absolute_section, &zero_address_frag, |
1291 | value); | |
ba8826a8 AO |
1292 | if (force_reset) |
1293 | force_reset_view = sym; | |
1294 | } | |
1295 | } | |
1296 | else | |
1297 | { | |
1298 | char *name = read_symbol_name (); | |
1299 | ||
1300 | if (!name) | |
1301 | return; | |
1302 | sym = symbol_find_or_make (name); | |
38cf168b | 1303 | if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) |
ba8826a8 | 1304 | { |
38cf168b | 1305 | if (S_IS_VOLATILE (sym)) |
ba8826a8 | 1306 | sym = symbol_clone (sym, 1); |
38cf168b AM |
1307 | else if (!S_CAN_BE_REDEFINED (sym)) |
1308 | { | |
1309 | as_bad (_("symbol `%s' is already defined"), name); | |
1310 | return; | |
1311 | } | |
ba8826a8 | 1312 | } |
38cf168b AM |
1313 | S_SET_SEGMENT (sym, undefined_section); |
1314 | S_SET_VALUE (sym, 0); | |
1315 | symbol_set_frag (sym, &zero_address_frag); | |
ba8826a8 AO |
1316 | } |
1317 | current.view = sym; | |
1318 | } | |
bd0eb99b RH |
1319 | else |
1320 | { | |
ecea7679 | 1321 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
d02603dc | 1322 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1323 | return; |
1324 | } | |
1325 | ||
d02603dc | 1326 | SKIP_WHITESPACE_AFTER_NAME (); |
bd0eb99b RH |
1327 | } |
1328 | ||
1329 | demand_empty_rest_of_line (); | |
5b7c81bd | 1330 | dwarf2_any_loc_directive_seen = dwarf2_loc_directive_seen = true; |
7cadeb2c | 1331 | debug_type = DEBUG_NONE; |
ba8826a8 AO |
1332 | |
1333 | /* If we were given a view id, emit the row right away. */ | |
1334 | if (current.view) | |
1335 | dwarf2_emit_insn (0); | |
220e750f | 1336 | } |
07a53e5c RH |
1337 | |
1338 | void | |
1339 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
1340 | { | |
1341 | offsetT value = get_absolute_expression (); | |
1342 | ||
1343 | if (value != 0 && value != 1) | |
1344 | { | |
1345 | as_bad (_("expected 0 or 1")); | |
1346 | ignore_rest_of_line (); | |
1347 | } | |
1348 | else | |
1349 | { | |
1350 | dwarf2_loc_mark_labels = value != 0; | |
1351 | demand_empty_rest_of_line (); | |
1352 | } | |
1353 | } | |
220e750f RH |
1354 | \f |
1355 | static struct frag * | |
a2e22468 | 1356 | first_frag_for_seg (segT seg) |
220e750f | 1357 | { |
c9049d30 | 1358 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
1359 | } |
1360 | ||
1361 | static struct frag * | |
a2e22468 | 1362 | last_frag_for_seg (segT seg) |
220e750f | 1363 | { |
c9049d30 | 1364 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 1365 | |
c9049d30 AM |
1366 | while (f->frch_next != NULL) |
1367 | f = f->frch_next; | |
220e750f | 1368 | |
c9049d30 | 1369 | return f->frch_last; |
220e750f RH |
1370 | } |
1371 | \f | |
1372 | /* Emit a single byte into the current segment. */ | |
1373 | ||
1374 | static inline void | |
a2e22468 | 1375 | out_byte (int byte) |
220e750f RH |
1376 | { |
1377 | FRAG_APPEND_1_CHAR (byte); | |
1378 | } | |
1379 | ||
1380 | /* Emit a statement program opcode into the current segment. */ | |
1381 | ||
1382 | static inline void | |
a2e22468 | 1383 | out_opcode (int opc) |
220e750f RH |
1384 | { |
1385 | out_byte (opc); | |
1386 | } | |
1387 | ||
1388 | /* Emit a two-byte word into the current segment. */ | |
1389 | ||
1390 | static inline void | |
a2e22468 | 1391 | out_two (int data) |
220e750f RH |
1392 | { |
1393 | md_number_to_chars (frag_more (2), data, 2); | |
1394 | } | |
1395 | ||
1396 | /* Emit a four byte word into the current segment. */ | |
1397 | ||
1398 | static inline void | |
a2e22468 | 1399 | out_four (int data) |
220e750f RH |
1400 | { |
1401 | md_number_to_chars (frag_more (4), data, 4); | |
1402 | } | |
1403 | ||
1404 | /* Emit an unsigned "little-endian base 128" number. */ | |
1405 | ||
fac0d250 | 1406 | static void |
a2e22468 | 1407 | out_uleb128 (addressT value) |
220e750f RH |
1408 | { |
1409 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
1410 | } | |
1411 | ||
92846e72 CC |
1412 | /* Emit a signed "little-endian base 128" number. */ |
1413 | ||
1414 | static void | |
1415 | out_leb128 (addressT value) | |
1416 | { | |
1417 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
1418 | } | |
1419 | ||
220e750f RH |
1420 | /* Emit a tuple for .debug_abbrev. */ |
1421 | ||
1422 | static inline void | |
a2e22468 | 1423 | out_abbrev (int name, int form) |
fac0d250 | 1424 | { |
220e750f RH |
1425 | out_uleb128 (name); |
1426 | out_uleb128 (form); | |
1427 | } | |
fac0d250 | 1428 | |
220e750f | 1429 | /* Get the size of a fragment. */ |
fac0d250 | 1430 | |
220e750f | 1431 | static offsetT |
c9049d30 | 1432 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
1433 | { |
1434 | frchainS *fr; | |
1435 | ||
1436 | if (frag->fr_next) | |
1437 | return frag->fr_fix; | |
1438 | ||
1439 | /* If a fragment is the last in the chain, special measures must be | |
1440 | taken to find its size before relaxation, since it may be pending | |
1441 | on some subsegment chain. */ | |
c9049d30 | 1442 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 1443 | if (fr->frch_last == frag) |
c5c0a210 | 1444 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
1445 | |
1446 | abort (); | |
1447 | } | |
fac0d250 | 1448 | |
220e750f | 1449 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 1450 | |
220e750f | 1451 | static void |
07a53e5c | 1452 | out_set_addr (symbolS *sym) |
220e750f | 1453 | { |
91d6fa6a | 1454 | expressionS exp; |
9e3af0e7 | 1455 | |
031e3350 | 1456 | memset (&exp, 0, sizeof exp); |
e2b9a97e CE |
1457 | out_opcode (DW_LNS_extended_op); |
1458 | out_uleb128 (sizeof_address + 1); | |
fac0d250 | 1459 | |
e2b9a97e | 1460 | out_opcode (DW_LNE_set_address); |
91d6fa6a NC |
1461 | exp.X_op = O_symbol; |
1462 | exp.X_add_symbol = sym; | |
1463 | exp.X_add_number = 0; | |
1464 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
1465 | } |
1466 | ||
a2e22468 | 1467 | static void scale_addr_delta (addressT *); |
c8970b4b | 1468 | |
a3b75434 | 1469 | static void |
d7342424 | 1470 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
1471 | { |
1472 | static int printed_this = 0; | |
8fbf7334 | 1473 | if (DWARF2_LINE_MIN_INSN_LENGTH > 1) |
a3b75434 | 1474 | { |
8fbf7334 | 1475 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this) |
8f02ae5b | 1476 | { |
8fbf7334 | 1477 | as_bad("unaligned opcodes detected in executable segment"); |
8f02ae5b AM |
1478 | printed_this = 1; |
1479 | } | |
8fbf7334 | 1480 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; |
a3b75434 | 1481 | } |
a3b75434 | 1482 | } |
a3b75434 | 1483 | |
220e750f RH |
1484 | /* Encode a pair of line and address skips as efficiently as possible. |
1485 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 1486 | |
220e750f RH |
1487 | The following two routines *must* be kept in sync. This is |
1488 | enforced by making emit_inc_line_addr abort if we do not emit | |
1489 | exactly the expected number of bytes. */ | |
1490 | ||
1491 | static int | |
a2e22468 | 1492 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 1493 | { |
220e750f RH |
1494 | unsigned int tmp, opcode; |
1495 | int len = 0; | |
fac0d250 | 1496 | |
220e750f | 1497 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 1498 | scale_addr_delta (&addr_delta); |
220e750f RH |
1499 | |
1500 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
1501 | We cannot use special opcodes here, since we want the end_sequence | |
1502 | to emit the matrix entry. */ | |
1503 | if (line_delta == INT_MAX) | |
fac0d250 | 1504 | { |
220e750f RH |
1505 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1506 | len = 1; | |
62e6b7b3 | 1507 | else if (addr_delta) |
220e750f RH |
1508 | len = 1 + sizeof_leb128 (addr_delta, 0); |
1509 | return len + 3; | |
fac0d250 | 1510 | } |
fac0d250 | 1511 | |
220e750f RH |
1512 | /* Bias the line delta by the base. */ |
1513 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 1514 | |
220e750f RH |
1515 | /* If the line increment is out of range of a special opcode, we |
1516 | must encode it with DW_LNS_advance_line. */ | |
1517 | if (tmp >= DWARF2_LINE_RANGE) | |
1518 | { | |
1519 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1520 | line_delta = 0; | |
1521 | tmp = 0 - DWARF2_LINE_BASE; | |
1522 | } | |
fac0d250 | 1523 | |
220e750f RH |
1524 | /* Bias the opcode by the special opcode base. */ |
1525 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 1526 | |
220e750f RH |
1527 | /* Avoid overflow when addr_delta is large. */ |
1528 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
1529 | { | |
1530 | /* Try using a special opcode. */ | |
1531 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1532 | if (opcode <= 255) | |
1533 | return len + 1; | |
1534 | ||
1535 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1536 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1537 | if (opcode <= 255) | |
1538 | return len + 2; | |
1539 | } | |
1540 | ||
1541 | /* Otherwise use DW_LNS_advance_pc. */ | |
1542 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
1543 | ||
1544 | /* DW_LNS_copy or special opcode. */ | |
1545 | len += 1; | |
1546 | ||
1547 | return len; | |
1548 | } | |
fac0d250 | 1549 | |
220e750f | 1550 | static void |
a2e22468 | 1551 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
1552 | { |
1553 | unsigned int tmp, opcode; | |
1554 | int need_copy = 0; | |
1555 | char *end = p + len; | |
fac0d250 | 1556 | |
07a53e5c RH |
1557 | /* Line number sequences cannot go backward in addresses. This means |
1558 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1559 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 1560 | |
220e750f | 1561 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
1562 | scale_addr_delta (&addr_delta); |
1563 | ||
220e750f RH |
1564 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
1565 | We cannot use special opcodes here, since we want the end_sequence | |
1566 | to emit the matrix entry. */ | |
1567 | if (line_delta == INT_MAX) | |
fac0d250 | 1568 | { |
220e750f RH |
1569 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1570 | *p++ = DW_LNS_const_add_pc; | |
62e6b7b3 | 1571 | else if (addr_delta) |
fac0d250 | 1572 | { |
220e750f RH |
1573 | *p++ = DW_LNS_advance_pc; |
1574 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 1575 | } |
220e750f RH |
1576 | |
1577 | *p++ = DW_LNS_extended_op; | |
1578 | *p++ = 1; | |
1579 | *p++ = DW_LNE_end_sequence; | |
1580 | goto done; | |
fac0d250 RH |
1581 | } |
1582 | ||
220e750f RH |
1583 | /* Bias the line delta by the base. */ |
1584 | tmp = line_delta - DWARF2_LINE_BASE; | |
1585 | ||
1586 | /* If the line increment is out of range of a special opcode, we | |
1587 | must encode it with DW_LNS_advance_line. */ | |
1588 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 1589 | { |
220e750f RH |
1590 | *p++ = DW_LNS_advance_line; |
1591 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 1592 | |
220e750f RH |
1593 | line_delta = 0; |
1594 | tmp = 0 - DWARF2_LINE_BASE; | |
1595 | need_copy = 1; | |
1596 | } | |
fac0d250 | 1597 | |
bd0eb99b RH |
1598 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
1599 | special opcode. */ | |
1600 | if (line_delta == 0 && addr_delta == 0) | |
1601 | { | |
1602 | *p++ = DW_LNS_copy; | |
1603 | goto done; | |
1604 | } | |
1605 | ||
220e750f RH |
1606 | /* Bias the opcode by the special opcode base. */ |
1607 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1608 | |
220e750f RH |
1609 | /* Avoid overflow when addr_delta is large. */ |
1610 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 1611 | { |
220e750f RH |
1612 | /* Try using a special opcode. */ |
1613 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1614 | if (opcode <= 255) | |
1615 | { | |
1616 | *p++ = opcode; | |
1617 | goto done; | |
1618 | } | |
1619 | ||
1620 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1621 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1622 | if (opcode <= 255) | |
fac0d250 | 1623 | { |
220e750f RH |
1624 | *p++ = DW_LNS_const_add_pc; |
1625 | *p++ = opcode; | |
1626 | goto done; | |
fac0d250 RH |
1627 | } |
1628 | } | |
220e750f RH |
1629 | |
1630 | /* Otherwise use DW_LNS_advance_pc. */ | |
1631 | *p++ = DW_LNS_advance_pc; | |
1632 | p += output_leb128 (p, addr_delta, 0); | |
1633 | ||
1634 | if (need_copy) | |
1635 | *p++ = DW_LNS_copy; | |
fac0d250 | 1636 | else |
220e750f | 1637 | *p++ = tmp; |
fac0d250 | 1638 | |
220e750f | 1639 | done: |
9c2799c2 | 1640 | gas_assert (p == end); |
220e750f | 1641 | } |
a8316fe2 | 1642 | |
220e750f | 1643 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1644 | |
220e750f | 1645 | static void |
a2e22468 | 1646 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1647 | { |
1648 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1649 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1650 | } | |
9de8d8f1 | 1651 | |
1737851b BW |
1652 | /* Write out an alternative form of line and address skips using |
1653 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1654 | line and address information, but it is required if linker relaxation |
1655 | could change the code offsets. The following two routines *must* be | |
1656 | kept in sync. */ | |
453dc3f0 | 1657 | #define ADDR_DELTA_LIMIT 50000 |
1737851b | 1658 | |
7ddd14de BW |
1659 | static int |
1660 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1661 | { |
7ddd14de | 1662 | int len = 0; |
1737851b BW |
1663 | |
1664 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1665 | if (line_delta != INT_MAX) |
1666 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1667 | ||
453dc3f0 | 1668 | if (addr_delta > ADDR_DELTA_LIMIT) |
7ddd14de BW |
1669 | { |
1670 | /* DW_LNS_extended_op */ | |
1671 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1672 | /* DW_LNE_set_address */ | |
1673 | len += 1 + sizeof_address; | |
1674 | } | |
1675 | else | |
1676 | /* DW_LNS_fixed_advance_pc */ | |
1677 | len += 3; | |
1678 | ||
1737851b | 1679 | if (line_delta == INT_MAX) |
7ddd14de BW |
1680 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1681 | len += 3; | |
1682 | else | |
1683 | /* DW_LNS_copy */ | |
1684 | len += 1; | |
1685 | ||
1686 | return len; | |
1687 | } | |
1688 | ||
1689 | static void | |
1690 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1691 | char *p, int len) | |
1692 | { | |
91d6fa6a | 1693 | expressionS *pexp; |
7ddd14de BW |
1694 | char *end = p + len; |
1695 | ||
1696 | /* Line number sequences cannot go backward in addresses. This means | |
1697 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1698 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de | 1699 | |
b40bf0a2 NC |
1700 | /* Verify that we have kept in sync with size_fixed_inc_line_addr. */ |
1701 | gas_assert (len == size_fixed_inc_line_addr (line_delta, addr_delta)); | |
1702 | ||
7ddd14de BW |
1703 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ |
1704 | if (line_delta != INT_MAX) | |
1705 | { | |
1706 | *p++ = DW_LNS_advance_line; | |
1707 | p += output_leb128 (p, line_delta, 1); | |
1708 | } | |
1709 | ||
91d6fa6a | 1710 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1711 | |
1712 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1713 | advance the address by at most 64K. Linker relaxation (without | |
1714 | which this function would not be used) could change the operand by | |
1715 | an unknown amount. If the address increment is getting close to | |
1716 | the limit, just reset the address. */ | |
453dc3f0 | 1717 | if (addr_delta > ADDR_DELTA_LIMIT) |
1737851b | 1718 | { |
7ddd14de | 1719 | symbolS *to_sym; |
91d6fa6a | 1720 | expressionS exp; |
7ddd14de | 1721 | |
031e3350 | 1722 | memset (&exp, 0, sizeof exp); |
9f6db0d3 | 1723 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1724 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1725 | |
1726 | *p++ = DW_LNS_extended_op; | |
1727 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1728 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1729 | exp.X_op = O_symbol; |
1730 | exp.X_add_symbol = to_sym; | |
1731 | exp.X_add_number = 0; | |
62ebcb5c | 1732 | emit_expr_fix (&exp, sizeof_address, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de BW |
1733 | p += sizeof_address; |
1734 | } | |
1735 | else | |
1736 | { | |
1737 | *p++ = DW_LNS_fixed_advance_pc; | |
62ebcb5c | 1738 | emit_expr_fix (pexp, 2, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de | 1739 | p += 2; |
1737851b BW |
1740 | } |
1741 | ||
7ddd14de BW |
1742 | if (line_delta == INT_MAX) |
1743 | { | |
1744 | *p++ = DW_LNS_extended_op; | |
1745 | *p++ = 1; | |
1746 | *p++ = DW_LNE_end_sequence; | |
1747 | } | |
1748 | else | |
1749 | *p++ = DW_LNS_copy; | |
1737851b | 1750 | |
9c2799c2 | 1751 | gas_assert (p == end); |
1737851b BW |
1752 | } |
1753 | ||
220e750f RH |
1754 | /* Generate a variant frag that we can use to relax address/line |
1755 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1756 | |
220e750f | 1757 | static void |
07a53e5c | 1758 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1759 | { |
91d6fa6a | 1760 | expressionS exp; |
220e750f | 1761 | int max_chars; |
6576f0b5 | 1762 | |
031e3350 | 1763 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
1764 | exp.X_op = O_subtract; |
1765 | exp.X_add_symbol = to_sym; | |
1766 | exp.X_op_symbol = from_sym; | |
1767 | exp.X_add_number = 0; | |
fac0d250 | 1768 | |
220e750f RH |
1769 | /* The maximum size of the frag is the line delta with a maximum |
1770 | sized address delta. */ | |
7ddd14de BW |
1771 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1772 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1773 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1774 | else | |
1775 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1776 | |
220e750f | 1777 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1778 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1779 | } |
fac0d250 | 1780 | |
220e750f RH |
1781 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1782 | based on the current values of the symbols. It is called before | |
1783 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1784 | |
220e750f | 1785 | int |
a2e22468 | 1786 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1787 | { |
1788 | offsetT addr_delta; | |
1789 | int size; | |
fac0d250 | 1790 | |
6386f3a7 | 1791 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1792 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1793 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1794 | else | |
1795 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1796 | |
220e750f | 1797 | frag->fr_subtype = size; |
fac0d250 | 1798 | |
220e750f RH |
1799 | return size; |
1800 | } | |
1801 | ||
1802 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1803 | current values of the symbols. fr_subtype is the current length | |
1804 | of the frag. This returns the change in frag length. */ | |
1805 | ||
1806 | int | |
a2e22468 | 1807 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1808 | { |
1809 | int old_size, new_size; | |
fac0d250 | 1810 | |
220e750f RH |
1811 | old_size = frag->fr_subtype; |
1812 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1813 | |
220e750f | 1814 | return new_size - old_size; |
fac0d250 RH |
1815 | } |
1816 | ||
220e750f RH |
1817 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1818 | fill frag. This is called after all relaxation has been done. | |
1819 | fr_subtype will be the desired length of the frag. */ | |
1820 | ||
1821 | void | |
a2e22468 | 1822 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1823 | { |
220e750f RH |
1824 | offsetT addr_diff; |
1825 | ||
453dc3f0 NC |
1826 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1827 | { | |
2b0f3761 | 1828 | /* If linker relaxation is enabled then the distance between the two |
453dc3f0 NC |
1829 | symbols in the frag->fr_symbol expression might change. Hence we |
1830 | cannot rely upon the value computed by resolve_symbol_value. | |
1831 | Instead we leave the expression unfinalized and allow | |
1832 | emit_fixed_inc_line_addr to create a fixup (which later becomes a | |
1833 | relocation) that will allow the linker to correctly compute the | |
1834 | actual address difference. We have to use a fixed line advance for | |
1835 | this as we cannot (easily) relocate leb128 encoded values. */ | |
1836 | int saved_finalize_syms = finalize_syms; | |
1837 | ||
1838 | finalize_syms = 0; | |
1839 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
1840 | finalize_syms = saved_finalize_syms; | |
1841 | } | |
1842 | else | |
1843 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
fac0d250 | 1844 | |
220e750f RH |
1845 | /* fr_var carries the max_chars that we created the fragment with. |
1846 | fr_subtype carries the current expected length. We must, of | |
1847 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1848 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1849 | |
7ddd14de BW |
1850 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1851 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1852 | frag->fr_literal + frag->fr_fix, | |
1853 | frag->fr_subtype); | |
1854 | else | |
1855 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1856 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1857 | |
1858 | frag->fr_fix += frag->fr_subtype; | |
1859 | frag->fr_type = rs_fill; | |
1860 | frag->fr_var = 0; | |
1861 | frag->fr_offset = 0; | |
1862 | } | |
1863 | ||
1864 | /* Generate .debug_line content for the chain of line number entries | |
1865 | beginning at E, for segment SEG. */ | |
1866 | ||
1867 | static void | |
a2e22468 | 1868 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1869 | { |
1870 | unsigned filenum = 1; | |
1871 | unsigned line = 1; | |
1872 | unsigned column = 0; | |
bd0eb99b RH |
1873 | unsigned isa = 0; |
1874 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1875 | fragS *last_frag = NULL, *frag; |
1876 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1877 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1878 | struct line_entry *next; |
1879 | ||
b40bf0a2 NC |
1880 | if (flag_dwarf_sections) |
1881 | { | |
1882 | char * name; | |
1883 | const char * sec_name; | |
1884 | ||
2b0f3761 | 1885 | /* Switch to the relevant sub-section before we start to emit |
b40bf0a2 NC |
1886 | the line number table. |
1887 | ||
1888 | FIXME: These sub-sections do not have a normal Line Number | |
1889 | Program Header, thus strictly speaking they are not valid | |
1890 | DWARF sections. Unfortunately the DWARF standard assumes | |
1891 | a one-to-one relationship between compilation units and | |
1892 | line number tables. Thus we have to have a .debug_line | |
1893 | section, as well as our sub-sections, and we have to ensure | |
1894 | that all of the sub-sections are merged into a proper | |
1895 | .debug_line section before a debugger sees them. */ | |
3739860c | 1896 | |
fd361982 | 1897 | sec_name = bfd_section_name (seg); |
b40bf0a2 NC |
1898 | if (strcmp (sec_name, ".text") != 0) |
1899 | { | |
29a2809e | 1900 | name = concat (".debug_line", sec_name, (char *) NULL); |
5b7c81bd | 1901 | subseg_set (subseg_get (name, false), 0); |
b40bf0a2 NC |
1902 | } |
1903 | else | |
1904 | /* Don't create a .debug_line.text section - | |
1905 | that is redundant. Instead just switch back to the | |
1906 | normal .debug_line section. */ | |
5b7c81bd | 1907 | subseg_set (subseg_get (".debug_line", false), 0); |
b40bf0a2 NC |
1908 | } |
1909 | ||
fead5cd9 | 1910 | do |
fac0d250 | 1911 | { |
07a53e5c | 1912 | int line_delta; |
220e750f RH |
1913 | |
1914 | if (filenum != e->loc.filenum) | |
fac0d250 | 1915 | { |
220e750f RH |
1916 | filenum = e->loc.filenum; |
1917 | out_opcode (DW_LNS_set_file); | |
1918 | out_uleb128 (filenum); | |
220e750f RH |
1919 | } |
1920 | ||
1921 | if (column != e->loc.column) | |
1922 | { | |
1923 | column = e->loc.column; | |
1924 | out_opcode (DW_LNS_set_column); | |
1925 | out_uleb128 (column); | |
220e750f RH |
1926 | } |
1927 | ||
92846e72 CC |
1928 | if (e->loc.discriminator != 0) |
1929 | { | |
1930 | out_opcode (DW_LNS_extended_op); | |
1931 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1932 | out_opcode (DW_LNE_set_discriminator); | |
1933 | out_uleb128 (e->loc.discriminator); | |
1934 | } | |
1935 | ||
bd0eb99b RH |
1936 | if (isa != e->loc.isa) |
1937 | { | |
1938 | isa = e->loc.isa; | |
1939 | out_opcode (DW_LNS_set_isa); | |
1940 | out_uleb128 (isa); | |
bd0eb99b RH |
1941 | } |
1942 | ||
1943 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1944 | { |
1945 | flags = e->loc.flags; | |
1946 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1947 | } |
1948 | ||
bd0eb99b | 1949 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1950 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1951 | |
bd0eb99b | 1952 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1953 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1954 | |
1955 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1956 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1957 | |
fb81275c JM |
1958 | /* Don't try to optimize away redundant entries; gdb wants two |
1959 | entries for a function where the code starts on the same line as | |
1960 | the {, and there's no way to identify that case here. Trust gcc | |
1961 | to optimize appropriately. */ | |
07a53e5c RH |
1962 | line_delta = e->loc.line - line; |
1963 | lab = e->label; | |
1964 | frag = symbol_get_frag (lab); | |
1965 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1966 | |
ba8826a8 AO |
1967 | if (last_frag == NULL |
1968 | || (e->loc.view == force_reset_view && force_reset_view | |
1969 | /* If we're going to reset the view, but we know we're | |
1970 | advancing the PC, we don't have to force with | |
1971 | set_address. We know we do when we're at the same | |
1972 | address of the same frag, and we know we might when | |
1973 | we're in the beginning of a frag, and we were at the | |
1974 | end of the previous frag. */ | |
1975 | && (frag == last_frag | |
1976 | ? (last_frag_ofs == frag_ofs) | |
1977 | : (frag_ofs == 0 | |
1978 | && ((offsetT)last_frag_ofs | |
1979 | >= get_frag_fix (last_frag, seg)))))) | |
220e750f | 1980 | { |
07a53e5c RH |
1981 | out_set_addr (lab); |
1982 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1983 | } |
7ddd14de | 1984 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1985 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1986 | else | |
1987 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1988 | ||
1989 | line = e->loc.line; | |
1990 | last_lab = lab; | |
1991 | last_frag = frag; | |
1992 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1993 | |
1994 | next = e->next; | |
1995 | free (e); | |
1996 | e = next; | |
fac0d250 | 1997 | } |
fead5cd9 | 1998 | while (e); |
353e2c69 | 1999 | |
220e750f | 2000 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 2001 | frag = last_frag_for_seg (seg); |
c9049d30 | 2002 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 2003 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 2004 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 2005 | else |
07a53e5c | 2006 | { |
e01e1cee | 2007 | lab = symbol_temp_new (seg, frag, frag_ofs); |
07a53e5c RH |
2008 | relax_inc_line_addr (INT_MAX, lab, last_lab); |
2009 | } | |
fac0d250 RH |
2010 | } |
2011 | ||
d2a54558 MW |
2012 | /* Switch to LINE_STR_SEG and output the given STR. Return the |
2013 | symbol pointing to the new string in the section. */ | |
2014 | ||
2015 | static symbolS * | |
2016 | add_line_strp (segT line_str_seg, const char *str) | |
2017 | { | |
2018 | char *cp; | |
2019 | size_t size; | |
2020 | symbolS *sym; | |
2021 | ||
2022 | subseg_set (line_str_seg, 0); | |
2023 | ||
2024 | sym = symbol_temp_new_now_octets (); | |
2025 | ||
2026 | size = strlen (str) + 1; | |
2027 | cp = frag_more (size); | |
2028 | memcpy (cp, str, size); | |
2029 | ||
2030 | return sym; | |
2031 | } | |
2032 | ||
2033 | ||
220e750f RH |
2034 | /* Emit the directory and file tables for .debug_line. */ |
2035 | ||
fac0d250 | 2036 | static void |
d2a54558 | 2037 | out_dir_and_file_list (segT line_seg, int sizeof_offset) |
fac0d250 RH |
2038 | { |
2039 | size_t size; | |
3d6b762c | 2040 | const char *dir; |
fac0d250 | 2041 | char *cp; |
220e750f | 2042 | unsigned int i; |
5b7c81bd AM |
2043 | bool emit_md5 = false; |
2044 | bool emit_timestamps = true; | |
2045 | bool emit_filesize = true; | |
d2a54558 MW |
2046 | segT line_str_seg = NULL; |
2047 | symbolS *line_strp; | |
220e750f | 2048 | |
5496f3c6 | 2049 | /* Output the Directory Table. */ |
5496f3c6 NC |
2050 | if (DWARF2_LINE_VERSION >= 5) |
2051 | { | |
546cb2d8 | 2052 | /* We only have one column in the directory table. */ |
5496f3c6 | 2053 | out_byte (1); |
546cb2d8 NC |
2054 | |
2055 | /* Describe the purpose and format of the column. */ | |
5496f3c6 | 2056 | out_uleb128 (DW_LNCT_path); |
d2a54558 MW |
2057 | /* Store these strings in the .debug_line_str section so they |
2058 | can be shared. */ | |
2059 | out_uleb128 (DW_FORM_line_strp); | |
546cb2d8 | 2060 | |
f63d03dd MW |
2061 | /* Now state how many rows there are in the table. We need at |
2062 | least 1 if there is one or more file names to store the | |
2063 | "working directory". */ | |
2064 | if (dirs_in_use == 0 && files_in_use > 0) | |
2065 | out_uleb128 (1); | |
2066 | else | |
2067 | out_uleb128 (dirs_in_use); | |
5496f3c6 NC |
2068 | } |
2069 | ||
a7ed1ca2 | 2070 | /* Emit directory list. */ |
f63d03dd | 2071 | if (DWARF2_LINE_VERSION >= 5 && (dirs_in_use > 0 || files_in_use > 0)) |
5496f3c6 | 2072 | { |
d2a54558 MW |
2073 | line_str_seg = subseg_new (".debug_line_str", 0); |
2074 | bfd_set_section_flags (line_str_seg, | |
2075 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2076 | | SEC_MERGE | SEC_STRINGS); | |
2077 | line_str_seg->entsize = 1; | |
2078 | ||
f63d03dd MW |
2079 | /* DWARF5 uses slot zero, but that is only set explicitly |
2080 | using a .file 0 directive. If that isn't used, but dir | |
2081 | one is used, then use that as main file directory. | |
2082 | Otherwise use pwd as main file directory. */ | |
2083 | if (dirs_in_use > 0 && dirs != NULL && dirs[0] != NULL) | |
5496f3c6 | 2084 | dir = remap_debug_filename (dirs[0]); |
f63d03dd MW |
2085 | else if (dirs_in_use > 1 && dirs != NULL && dirs[1] != NULL) |
2086 | dir = remap_debug_filename (dirs[1]); | |
2087 | else | |
2088 | dir = remap_debug_filename (getpwd ()); | |
2089 | ||
d2a54558 MW |
2090 | line_strp = add_line_strp (line_str_seg, dir); |
2091 | subseg_set (line_seg, 0); | |
2092 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
5496f3c6 | 2093 | } |
a7ed1ca2 NC |
2094 | for (i = 1; i < dirs_in_use; ++i) |
2095 | { | |
3d6b762c | 2096 | dir = remap_debug_filename (dirs[i]); |
d2a54558 MW |
2097 | if (DWARF2_LINE_VERSION < 5) |
2098 | { | |
2099 | size = strlen (dir) + 1; | |
2100 | cp = frag_more (size); | |
2101 | memcpy (cp, dir, size); | |
2102 | } | |
2103 | else | |
2104 | { | |
2105 | line_strp = add_line_strp (line_str_seg, dir); | |
2106 | subseg_set (line_seg, 0); | |
2107 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2108 | } | |
a7ed1ca2 | 2109 | } |
fac0d250 | 2110 | |
5496f3c6 NC |
2111 | if (DWARF2_LINE_VERSION < 5) |
2112 | /* Terminate it. */ | |
2113 | out_byte ('\0'); | |
2114 | ||
2115 | /* Output the File Name Table. */ | |
5496f3c6 NC |
2116 | if (DWARF2_LINE_VERSION >= 5) |
2117 | { | |
2118 | unsigned int columns = 4; | |
2119 | ||
2120 | if (((unsigned long) DWARF2_FILE_TIME_NAME ("", "")) == -1UL) | |
2121 | { | |
5b7c81bd | 2122 | emit_timestamps = false; |
5496f3c6 NC |
2123 | -- columns; |
2124 | } | |
2125 | ||
2126 | if (DWARF2_FILE_SIZE_NAME ("", "") == -1) | |
2127 | { | |
5b7c81bd | 2128 | emit_filesize = false; |
5496f3c6 NC |
2129 | -- columns; |
2130 | } | |
2131 | ||
2132 | for (i = 0; i < files_in_use; ++i) | |
2133 | if (files[i].md5[0] != 0) | |
2134 | break; | |
2135 | if (i < files_in_use) | |
2136 | { | |
5b7c81bd | 2137 | emit_md5 = true; |
5496f3c6 NC |
2138 | ++ columns; |
2139 | } | |
2140 | ||
2141 | /* The number of format entries to follow. */ | |
2142 | out_byte (columns); | |
5496f3c6 NC |
2143 | /* The format of the file name. */ |
2144 | out_uleb128 (DW_LNCT_path); | |
d2a54558 MW |
2145 | /* Store these strings in the .debug_line_str section so they |
2146 | can be shared. */ | |
2147 | out_uleb128 (DW_FORM_line_strp); | |
5496f3c6 NC |
2148 | |
2149 | /* The format of the directory index. */ | |
2150 | out_uleb128 (DW_LNCT_directory_index); | |
2151 | out_uleb128 (DW_FORM_udata); | |
2152 | ||
2153 | if (emit_timestamps) | |
2154 | { | |
2155 | /* The format of the timestamp. */ | |
2156 | out_uleb128 (DW_LNCT_timestamp); | |
2157 | out_uleb128 (DW_FORM_udata); | |
2158 | } | |
2159 | ||
2160 | if (emit_filesize) | |
2161 | { | |
2162 | /* The format of the file size. */ | |
2163 | out_uleb128 (DW_LNCT_size); | |
2164 | out_uleb128 (DW_FORM_udata); | |
2165 | } | |
2166 | ||
2167 | if (emit_md5) | |
2168 | { | |
2169 | /* The format of the MD5 sum. */ | |
2170 | out_uleb128 (DW_LNCT_MD5); | |
2171 | out_uleb128 (DW_FORM_data16); | |
2172 | } | |
2173 | ||
2174 | /* The number of entries in the table. */ | |
2175 | out_uleb128 (files_in_use); | |
2176 | } | |
2177 | ||
2178 | for (i = DWARF2_LINE_VERSION > 4 ? 0 : 1; i < files_in_use; ++i) | |
fac0d250 | 2179 | { |
01e1a5bc NC |
2180 | const char *fullfilename; |
2181 | ||
249e3833 RH |
2182 | if (files[i].filename == NULL) |
2183 | { | |
f63d03dd MW |
2184 | /* Prevent a crash later, particularly for file 1. DWARF5 |
2185 | uses slot zero, but that is only set explicitly using a | |
2186 | .file 0 directive. If that isn't used, but file 1 is, | |
2187 | then use that as main file name. */ | |
2188 | if (DWARF2_LINE_VERSION >= 5 && i == 0 && files_in_use >= 1) | |
2189 | files[0].filename = files[1].filename; | |
2190 | else | |
2191 | files[i].filename = ""; | |
5496f3c6 NC |
2192 | if (DWARF2_LINE_VERSION < 5 || i != 0) |
2193 | { | |
2194 | as_bad (_("unassigned file number %ld"), (long) i); | |
2195 | continue; | |
2196 | } | |
249e3833 RH |
2197 | } |
2198 | ||
01e1a5bc NC |
2199 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
2200 | files[i].dir ? dirs [files [i].dir] : ""); | |
d2a54558 MW |
2201 | if (DWARF2_LINE_VERSION < 5) |
2202 | { | |
2203 | size = strlen (fullfilename) + 1; | |
2204 | cp = frag_more (size); | |
2205 | memcpy (cp, fullfilename, size); | |
2206 | } | |
2207 | else | |
2208 | { | |
2209 | line_strp = add_line_strp (line_str_seg, fullfilename); | |
2210 | subseg_set (line_seg, 0); | |
2211 | TC_DWARF2_EMIT_OFFSET (line_strp, sizeof_offset); | |
2212 | } | |
fac0d250 | 2213 | |
5496f3c6 NC |
2214 | /* Directory number. */ |
2215 | out_uleb128 (files[i].dir); | |
2216 | ||
01e1a5bc | 2217 | /* Output the last modification timestamp. */ |
5496f3c6 NC |
2218 | if (emit_timestamps) |
2219 | { | |
2220 | offsetT timestamp; | |
2221 | ||
2222 | timestamp = DWARF2_FILE_TIME_NAME (files[i].filename, | |
2223 | files[i].dir ? dirs [files [i].dir] : ""); | |
2224 | if (timestamp == -1) | |
2225 | timestamp = 0; | |
2226 | out_uleb128 (timestamp); | |
2227 | } | |
2228 | ||
01e1a5bc | 2229 | /* Output the filesize. */ |
5496f3c6 NC |
2230 | if (emit_filesize) |
2231 | { | |
2232 | offsetT filesize; | |
2233 | filesize = DWARF2_FILE_SIZE_NAME (files[i].filename, | |
2234 | files[i].dir ? dirs [files [i].dir] : ""); | |
2235 | if (filesize == -1) | |
2236 | filesize = 0; | |
2237 | out_uleb128 (filesize); | |
2238 | } | |
2239 | ||
2240 | /* Output the md5 sum. */ | |
2241 | if (emit_md5) | |
2242 | { | |
2243 | int b; | |
2244 | ||
2245 | for (b = 0; b < NUM_MD5_BYTES; b++) | |
2246 | out_byte (files[i].md5[b]); | |
2247 | } | |
fac0d250 | 2248 | } |
353e2c69 | 2249 | |
5496f3c6 NC |
2250 | if (DWARF2_LINE_VERSION < 5) |
2251 | /* Terminate filename list. */ | |
2252 | out_byte (0); | |
fac0d250 RH |
2253 | } |
2254 | ||
413a266c AM |
2255 | /* Switch to SEC and output a header length field. Return the size of |
2256 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
d025d5e5 MW |
2257 | to the end of the section. EXPR->X_add_number will be set to the |
2258 | negative size of the header. */ | |
413a266c AM |
2259 | |
2260 | static int | |
91d6fa6a | 2261 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
2262 | { |
2263 | symbolS *start_sym; | |
2264 | symbolS *end_sym; | |
2265 | ||
2266 | subseg_set (sec, 0); | |
b57dc16f | 2267 | |
0f8f0c57 NC |
2268 | if (flag_dwarf_sections) |
2269 | { | |
2270 | /* If we are going to put the start and end symbols in different | |
2271 | sections, then we need real symbols, not just fake, local ones. */ | |
2272 | frag_now_fix (); | |
2273 | start_sym = symbol_make (".Ldebug_line_start"); | |
2274 | end_sym = symbol_make (".Ldebug_line_end"); | |
2275 | symbol_set_value_now (start_sym); | |
2276 | } | |
2277 | else | |
0f8f0c57 | 2278 | { |
72354279 | 2279 | start_sym = symbol_temp_new_now_octets (); |
0f8f0c57 NC |
2280 | end_sym = symbol_temp_make (); |
2281 | } | |
413a266c AM |
2282 | |
2283 | /* Total length of the information. */ | |
91d6fa6a NC |
2284 | exp->X_op = O_subtract; |
2285 | exp->X_add_symbol = end_sym; | |
2286 | exp->X_op_symbol = start_sym; | |
413a266c AM |
2287 | |
2288 | switch (DWARF2_FORMAT (sec)) | |
2289 | { | |
2290 | case dwarf2_format_32bit: | |
91d6fa6a NC |
2291 | exp->X_add_number = -4; |
2292 | emit_expr (exp, 4); | |
413a266c AM |
2293 | return 4; |
2294 | ||
2295 | case dwarf2_format_64bit: | |
91d6fa6a | 2296 | exp->X_add_number = -12; |
413a266c | 2297 | out_four (-1); |
91d6fa6a | 2298 | emit_expr (exp, 8); |
413a266c AM |
2299 | return 8; |
2300 | ||
2301 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
2302 | exp->X_add_number = -8; |
2303 | emit_expr (exp, 8); | |
413a266c AM |
2304 | return 8; |
2305 | } | |
2306 | ||
2307 | as_fatal (_("internal error: unknown dwarf2 format")); | |
2308 | return 0; | |
2309 | } | |
2310 | ||
220e750f RH |
2311 | /* Emit the collected .debug_line data. */ |
2312 | ||
2313 | static void | |
a2e22468 | 2314 | out_debug_line (segT line_seg) |
220e750f | 2315 | { |
91d6fa6a | 2316 | expressionS exp; |
02fe846e | 2317 | symbolS *prologue_start, *prologue_end; |
220e750f RH |
2318 | symbolS *line_end; |
2319 | struct line_seg *s; | |
14e777e0 | 2320 | int sizeof_offset; |
220e750f | 2321 | |
031e3350 | 2322 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2323 | sizeof_offset = out_header (line_seg, &exp); |
2324 | line_end = exp.X_add_symbol; | |
220e750f RH |
2325 | |
2326 | /* Version. */ | |
88ebb0a1 | 2327 | out_two (DWARF2_LINE_VERSION); |
220e750f | 2328 | |
5496f3c6 NC |
2329 | if (DWARF2_LINE_VERSION >= 5) |
2330 | { | |
2331 | out_byte (sizeof_address); | |
2332 | out_byte (0); /* Segment Selector size. */ | |
2333 | } | |
220e750f | 2334 | /* Length of the prologue following this length. */ |
02fe846e | 2335 | prologue_start = symbol_temp_make (); |
413a266c | 2336 | prologue_end = symbol_temp_make (); |
02fe846e | 2337 | exp.X_op = O_subtract; |
91d6fa6a | 2338 | exp.X_add_symbol = prologue_end; |
02fe846e AM |
2339 | exp.X_op_symbol = prologue_start; |
2340 | exp.X_add_number = 0; | |
91d6fa6a | 2341 | emit_expr (&exp, sizeof_offset); |
e2b9a97e | 2342 | symbol_set_value_now (prologue_start); |
220e750f RH |
2343 | |
2344 | /* Parameters of the state machine. */ | |
2345 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
5496f3c6 NC |
2346 | if (DWARF2_LINE_VERSION >= 4) |
2347 | out_byte (DWARF2_LINE_MAX_OPS_PER_INSN); | |
220e750f RH |
2348 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); |
2349 | out_byte (DWARF2_LINE_BASE); | |
2350 | out_byte (DWARF2_LINE_RANGE); | |
2351 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
2352 | ||
2353 | /* Standard opcode lengths. */ | |
2354 | out_byte (0); /* DW_LNS_copy */ | |
2355 | out_byte (1); /* DW_LNS_advance_pc */ | |
2356 | out_byte (1); /* DW_LNS_advance_line */ | |
2357 | out_byte (1); /* DW_LNS_set_file */ | |
2358 | out_byte (1); /* DW_LNS_set_column */ | |
2359 | out_byte (0); /* DW_LNS_negate_stmt */ | |
2360 | out_byte (0); /* DW_LNS_set_basic_block */ | |
2361 | out_byte (0); /* DW_LNS_const_add_pc */ | |
2362 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
2363 | out_byte (0); /* DW_LNS_set_prologue_end */ |
2364 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
2365 | out_byte (1); /* DW_LNS_set_isa */ | |
5496f3c6 NC |
2366 | /* We have emitted 12 opcode lengths, so make that this |
2367 | matches up to the opcode base value we have been using. */ | |
2368 | gas_assert (DWARF2_LINE_OPCODE_BASE == 13); | |
220e750f | 2369 | |
d2a54558 | 2370 | out_dir_and_file_list (line_seg, sizeof_offset); |
220e750f | 2371 | |
e2b9a97e | 2372 | symbol_set_value_now (prologue_end); |
220e750f RH |
2373 | |
2374 | /* For each section, emit a statement program. */ | |
ee515fb7 | 2375 | for (s = all_segs; s; s = s->next) |
bcb78b47 NC |
2376 | /* Paranoia - this check should have already have |
2377 | been handled in dwarf2_gen_line_info_1(). */ | |
9aec2026 NC |
2378 | if (SEG_NORMAL (s->seg)) |
2379 | process_entries (s->seg, s->head->head); | |
220e750f | 2380 | |
b40bf0a2 NC |
2381 | if (flag_dwarf_sections) |
2382 | /* We have to switch to the special .debug_line_end section | |
2383 | before emitting the end-of-debug_line symbol. The linker | |
2384 | script arranges for this section to be placed after all the | |
2385 | (potentially garbage collected) .debug_line.<foo> sections. | |
2386 | This section contains the line_end symbol which is used to | |
2387 | compute the size of the linked .debug_line section, as seen | |
2388 | in the DWARF Line Number header. */ | |
5b7c81bd | 2389 | subseg_set (subseg_get (".debug_line_end", false), 0); |
b40bf0a2 | 2390 | |
e2b9a97e | 2391 | symbol_set_value_now (line_end); |
220e750f RH |
2392 | } |
2393 | ||
802f5d9e | 2394 | static void |
bdd3b953 | 2395 | out_debug_ranges (segT ranges_seg, symbolS **ranges_sym) |
802f5d9e NC |
2396 | { |
2397 | unsigned int addr_size = sizeof_address; | |
2398 | struct line_seg *s; | |
91d6fa6a | 2399 | expressionS exp; |
802f5d9e NC |
2400 | unsigned int i; |
2401 | ||
031e3350 | 2402 | memset (&exp, 0, sizeof exp); |
802f5d9e NC |
2403 | subseg_set (ranges_seg, 0); |
2404 | ||
bdd3b953 MW |
2405 | /* For DW_AT_ranges to point at (there is no header, so really start |
2406 | of section, but see out_debug_rnglists). */ | |
2407 | *ranges_sym = symbol_temp_new_now_octets (); | |
2408 | ||
802f5d9e | 2409 | /* Base Address Entry. */ |
7fd3924a | 2410 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2411 | out_byte (0xff); |
7fd3924a | 2412 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2413 | out_byte (0); |
2414 | ||
2415 | /* Range List Entry. */ | |
2416 | for (s = all_segs; s; s = s->next) | |
2417 | { | |
2418 | fragS *frag; | |
2419 | symbolS *beg, *end; | |
2420 | ||
2421 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2422 | beg = symbol_temp_new (s->seg, frag, 0); |
802f5d9e NC |
2423 | s->text_start = beg; |
2424 | ||
2425 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2426 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
802f5d9e NC |
2427 | s->text_end = end; |
2428 | ||
91d6fa6a NC |
2429 | exp.X_op = O_symbol; |
2430 | exp.X_add_symbol = beg; | |
2431 | exp.X_add_number = 0; | |
2432 | emit_expr (&exp, addr_size); | |
802f5d9e | 2433 | |
91d6fa6a NC |
2434 | exp.X_op = O_symbol; |
2435 | exp.X_add_symbol = end; | |
2436 | exp.X_add_number = 0; | |
2437 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
2438 | } |
2439 | ||
2440 | /* End of Range Entry. */ | |
7fd3924a | 2441 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2442 | out_byte (0); |
7fd3924a | 2443 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2444 | out_byte (0); |
2445 | } | |
2446 | ||
bdd3b953 MW |
2447 | static void |
2448 | out_debug_rnglists (segT ranges_seg, symbolS **ranges_sym) | |
2449 | { | |
2450 | expressionS exp; | |
2451 | symbolS *ranges_end; | |
2452 | struct line_seg *s; | |
2453 | ||
2454 | /* Unit length. */ | |
2455 | memset (&exp, 0, sizeof exp); | |
2456 | out_header (ranges_seg, &exp); | |
2457 | ranges_end = exp.X_add_symbol; | |
2458 | ||
2459 | out_two (DWARF2_RNGLISTS_VERSION); | |
2460 | out_byte (sizeof_address); | |
2461 | out_byte (0); /* Segment Selector size. */ | |
2462 | out_four (0); /* Offset entry count. */ | |
2463 | ||
2464 | /* For DW_AT_ranges to point at (must be after the header). */ | |
2465 | *ranges_sym = symbol_temp_new_now_octets (); | |
2466 | ||
2467 | for (s = all_segs; s; s = s->next) | |
2468 | { | |
2469 | fragS *frag; | |
2470 | symbolS *beg, *end; | |
2471 | ||
2472 | out_byte (DW_RLE_start_length); | |
2473 | ||
2474 | frag = first_frag_for_seg (s->seg); | |
2475 | beg = symbol_temp_new (s->seg, frag, 0); | |
2476 | s->text_start = beg; | |
2477 | ||
2478 | frag = last_frag_for_seg (s->seg); | |
2479 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); | |
2480 | s->text_end = end; | |
2481 | ||
2482 | exp.X_op = O_symbol; | |
2483 | exp.X_add_symbol = beg; | |
2484 | exp.X_add_number = 0; | |
2485 | emit_expr (&exp, sizeof_address); | |
2486 | ||
2487 | exp.X_op = O_symbol; | |
2488 | exp.X_add_symbol = end; | |
2489 | exp.X_add_number = 0; | |
2490 | emit_leb128_expr (&exp, 0); | |
2491 | } | |
2492 | ||
2493 | out_byte (DW_RLE_end_of_list); | |
2494 | ||
2495 | symbol_set_value_now (ranges_end); | |
2496 | } | |
2497 | ||
220e750f RH |
2498 | /* Emit data for .debug_aranges. */ |
2499 | ||
58b5739a | 2500 | static void |
a2e22468 | 2501 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 2502 | { |
220e750f | 2503 | unsigned int addr_size = sizeof_address; |
d025d5e5 | 2504 | offsetT size; |
220e750f | 2505 | struct line_seg *s; |
91d6fa6a | 2506 | expressionS exp; |
413a266c | 2507 | symbolS *aranges_end; |
220e750f | 2508 | char *p; |
413a266c | 2509 | int sizeof_offset; |
fac0d250 | 2510 | |
031e3350 | 2511 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2512 | sizeof_offset = out_header (aranges_seg, &exp); |
2513 | aranges_end = exp.X_add_symbol; | |
d025d5e5 | 2514 | size = -exp.X_add_number; |
fac0d250 | 2515 | |
220e750f | 2516 | /* Version. */ |
88ebb0a1 | 2517 | out_two (DWARF2_ARANGES_VERSION); |
d025d5e5 | 2518 | size += 2; |
4dc7ead9 | 2519 | |
220e750f | 2520 | /* Offset to .debug_info. */ |
413a266c | 2521 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
d025d5e5 | 2522 | size += sizeof_offset; |
220e750f RH |
2523 | |
2524 | /* Size of an address (offset portion). */ | |
2525 | out_byte (addr_size); | |
d025d5e5 | 2526 | size++; |
220e750f RH |
2527 | |
2528 | /* Size of a segment descriptor. */ | |
2529 | out_byte (0); | |
d025d5e5 | 2530 | size++; |
220e750f RH |
2531 | |
2532 | /* Align the header. */ | |
d025d5e5 MW |
2533 | while ((size++ % (2 * addr_size)) > 0) |
2534 | out_byte (0); | |
4dc7ead9 | 2535 | |
ee515fb7 | 2536 | for (s = all_segs; s; s = s->next) |
220e750f RH |
2537 | { |
2538 | fragS *frag; | |
2539 | symbolS *beg, *end; | |
2540 | ||
2541 | frag = first_frag_for_seg (s->seg); | |
e01e1cee | 2542 | beg = symbol_temp_new (s->seg, frag, 0); |
220e750f RH |
2543 | s->text_start = beg; |
2544 | ||
2545 | frag = last_frag_for_seg (s->seg); | |
e01e1cee | 2546 | end = symbol_temp_new (s->seg, frag, get_frag_fix (frag, s->seg)); |
220e750f RH |
2547 | s->text_end = end; |
2548 | ||
91d6fa6a NC |
2549 | exp.X_op = O_symbol; |
2550 | exp.X_add_symbol = beg; | |
2551 | exp.X_add_number = 0; | |
2552 | emit_expr (&exp, addr_size); | |
220e750f | 2553 | |
91d6fa6a NC |
2554 | exp.X_op = O_subtract; |
2555 | exp.X_add_symbol = end; | |
2556 | exp.X_op_symbol = beg; | |
2557 | exp.X_add_number = 0; | |
2558 | emit_expr (&exp, addr_size); | |
220e750f | 2559 | } |
4dc7ead9 | 2560 | |
220e750f RH |
2561 | p = frag_more (2 * addr_size); |
2562 | md_number_to_chars (p, 0, addr_size); | |
2563 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c | 2564 | |
e2b9a97e | 2565 | symbol_set_value_now (aranges_end); |
4dc7ead9 RH |
2566 | } |
2567 | ||
220e750f RH |
2568 | /* Emit data for .debug_abbrev. Note that this must be kept in |
2569 | sync with out_debug_info below. */ | |
fac0d250 | 2570 | |
220e750f | 2571 | static void |
413a266c AM |
2572 | out_debug_abbrev (segT abbrev_seg, |
2573 | segT info_seg ATTRIBUTE_UNUSED, | |
2574 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f | 2575 | { |
dd216e07 | 2576 | int secoff_form; |
220e750f | 2577 | subseg_set (abbrev_seg, 0); |
fac0d250 | 2578 | |
220e750f RH |
2579 | out_uleb128 (1); |
2580 | out_uleb128 (DW_TAG_compile_unit); | |
2581 | out_byte (DW_CHILDREN_no); | |
dd216e07 MW |
2582 | if (DWARF2_VERSION < 4) |
2583 | { | |
2584 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) | |
2585 | secoff_form = DW_FORM_data4; | |
2586 | else | |
2587 | secoff_form = DW_FORM_data8; | |
2588 | } | |
413a266c | 2589 | else |
dd216e07 MW |
2590 | secoff_form = DW_FORM_sec_offset; |
2591 | out_abbrev (DW_AT_stmt_list, secoff_form); | |
220e750f | 2592 | if (all_segs->next == NULL) |
4dc7ead9 | 2593 | { |
220e750f | 2594 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
88ebb0a1 MW |
2595 | if (DWARF2_VERSION < 4) |
2596 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
2597 | else | |
6b9a135d | 2598 | out_abbrev (DW_AT_high_pc, DW_FORM_udata); |
220e750f | 2599 | } |
802f5d9e | 2600 | else |
dd216e07 | 2601 | out_abbrev (DW_AT_ranges, secoff_form); |
49fced12 MW |
2602 | out_abbrev (DW_AT_name, DW_FORM_strp); |
2603 | out_abbrev (DW_AT_comp_dir, DW_FORM_strp); | |
2604 | out_abbrev (DW_AT_producer, DW_FORM_strp); | |
220e750f RH |
2605 | out_abbrev (DW_AT_language, DW_FORM_data2); |
2606 | out_abbrev (0, 0); | |
a987bfc9 RH |
2607 | |
2608 | /* Terminate the abbreviations for this compilation unit. */ | |
2609 | out_byte (0); | |
220e750f | 2610 | } |
4dc7ead9 | 2611 | |
220e750f | 2612 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 2613 | |
220e750f | 2614 | static void |
bdd3b953 MW |
2615 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, |
2616 | symbolS *ranges_sym, symbolS *name_sym, | |
2617 | symbolS *comp_dir_sym, symbolS *producer_sym) | |
220e750f | 2618 | { |
91d6fa6a | 2619 | expressionS exp; |
220e750f | 2620 | symbolS *info_end; |
14e777e0 | 2621 | int sizeof_offset; |
4dc7ead9 | 2622 | |
031e3350 | 2623 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2624 | sizeof_offset = out_header (info_seg, &exp); |
2625 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 2626 | |
220e750f | 2627 | /* DWARF version. */ |
fc0eebac | 2628 | out_two (DWARF2_VERSION); |
4dc7ead9 | 2629 | |
a3b3e858 MW |
2630 | if (DWARF2_VERSION < 5) |
2631 | { | |
2632 | /* .debug_abbrev offset */ | |
2633 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2634 | } | |
2635 | else | |
2636 | { | |
2637 | /* unit (header) type */ | |
2638 | out_byte (DW_UT_compile); | |
2639 | } | |
4dc7ead9 | 2640 | |
220e750f RH |
2641 | /* Target address size. */ |
2642 | out_byte (sizeof_address); | |
fac0d250 | 2643 | |
a3b3e858 MW |
2644 | if (DWARF2_VERSION >= 5) |
2645 | { | |
2646 | /* .debug_abbrev offset */ | |
2647 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); | |
2648 | } | |
2649 | ||
220e750f RH |
2650 | /* DW_TAG_compile_unit DIE abbrev */ |
2651 | out_uleb128 (1); | |
fac0d250 | 2652 | |
220e750f | 2653 | /* DW_AT_stmt_list */ |
413a266c AM |
2654 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
2655 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
2656 | ? 4 : 8)); | |
fac0d250 | 2657 | |
802f5d9e | 2658 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 2659 | if (all_segs->next == NULL) |
58b5739a | 2660 | { |
220e750f | 2661 | /* DW_AT_low_pc */ |
91d6fa6a NC |
2662 | exp.X_op = O_symbol; |
2663 | exp.X_add_symbol = all_segs->text_start; | |
2664 | exp.X_add_number = 0; | |
2665 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
2666 | |
2667 | /* DW_AT_high_pc */ | |
88ebb0a1 MW |
2668 | if (DWARF2_VERSION < 4) |
2669 | exp.X_op = O_symbol; | |
2670 | else | |
2671 | { | |
2672 | exp.X_op = O_subtract; | |
2673 | exp.X_op_symbol = all_segs->text_start; | |
2674 | } | |
91d6fa6a NC |
2675 | exp.X_add_symbol = all_segs->text_end; |
2676 | exp.X_add_number = 0; | |
6b9a135d MW |
2677 | if (DWARF2_VERSION < 4) |
2678 | emit_expr (&exp, sizeof_address); | |
2679 | else | |
2680 | emit_leb128_expr (&exp, 0); | |
58b5739a | 2681 | } |
802f5d9e NC |
2682 | else |
2683 | { | |
eb1fe072 NC |
2684 | /* This attribute is emitted if the code is disjoint. */ |
2685 | /* DW_AT_ranges. */ | |
bdd3b953 | 2686 | TC_DWARF2_EMIT_OFFSET (ranges_sym, sizeof_offset); |
802f5d9e | 2687 | } |
58b5739a | 2688 | |
49fced12 MW |
2689 | /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str |
2690 | setup in out_debug_str below. */ | |
2691 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2692 | TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset); | |
2693 | TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset); | |
2694 | ||
2695 | /* DW_AT_language. Yes, this is probably not really MIPS, but the | |
2696 | dwarf2 draft has no standard code for assembler. */ | |
2697 | out_two (DW_LANG_Mips_Assembler); | |
2698 | ||
e2b9a97e | 2699 | symbol_set_value_now (info_end); |
49fced12 MW |
2700 | } |
2701 | ||
2702 | /* Emit the three debug strings needed in .debug_str and setup symbols | |
2703 | to them for use in out_debug_info. */ | |
2704 | static void | |
2705 | out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym, | |
2706 | symbolS **producer_sym) | |
2707 | { | |
2708 | char producer[128]; | |
2709 | const char *comp_dir; | |
2710 | const char *dirname; | |
2711 | char *p; | |
2712 | int len; | |
5496f3c6 | 2713 | int first_file = DWARF2_LINE_VERSION > 4 ? 0 : 1; |
49fced12 MW |
2714 | |
2715 | subseg_set (str_seg, 0); | |
2716 | ||
48b91938 | 2717 | /* DW_AT_name. We don't have the actual file name that was present |
5496f3c6 | 2718 | on the command line, so assume files[first_file] is the main input file. |
48b91938 RH |
2719 | We're not supposed to get called unless at least one line number |
2720 | entry was emitted, so this should always be defined. */ | |
5c4e5fe6 | 2721 | *name_sym = symbol_temp_new_now_octets (); |
7fd3924a | 2722 | if (files_in_use == 0) |
48b91938 | 2723 | abort (); |
5496f3c6 | 2724 | if (files[first_file].dir) |
a7ed1ca2 | 2725 | { |
5496f3c6 | 2726 | dirname = remap_debug_filename (dirs[files[first_file].dir]); |
3d6b762c | 2727 | len = strlen (dirname); |
198f1251 TG |
2728 | #ifdef TE_VMS |
2729 | /* Already has trailing slash. */ | |
2730 | p = frag_more (len); | |
2731 | memcpy (p, dirname, len); | |
2732 | #else | |
a7ed1ca2 | 2733 | p = frag_more (len + 1); |
3d6b762c | 2734 | memcpy (p, dirname, len); |
56487c55 | 2735 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 2736 | #endif |
a7ed1ca2 | 2737 | } |
5496f3c6 | 2738 | len = strlen (files[first_file].filename) + 1; |
48b91938 | 2739 | p = frag_more (len); |
5496f3c6 | 2740 | memcpy (p, files[first_file].filename, len); |
48b91938 | 2741 | |
220e750f | 2742 | /* DW_AT_comp_dir */ |
5c4e5fe6 | 2743 | *comp_dir_sym = symbol_temp_new_now_octets (); |
3d6b762c | 2744 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
2745 | len = strlen (comp_dir) + 1; |
2746 | p = frag_more (len); | |
2747 | memcpy (p, comp_dir, len); | |
fac0d250 | 2748 | |
220e750f | 2749 | /* DW_AT_producer */ |
5c4e5fe6 | 2750 | *producer_sym = symbol_temp_new_now_octets (); |
220e750f RH |
2751 | sprintf (producer, "GNU AS %s", VERSION); |
2752 | len = strlen (producer) + 1; | |
2753 | p = frag_more (len); | |
2754 | memcpy (p, producer, len); | |
fac0d250 RH |
2755 | } |
2756 | ||
1e9cc1c2 NC |
2757 | void |
2758 | dwarf2_init (void) | |
2759 | { | |
1e9cc1c2 | 2760 | last_seg_ptr = &all_segs; |
0ac2b354 AB |
2761 | |
2762 | /* Select the default CIE version to produce here. The global | |
2763 | starts with a value of -1 and will be modified to a valid value | |
2764 | either by the user providing a command line option, or some | |
2765 | targets will select their own default in md_after_parse_args. If | |
2766 | we get here and the global still contains -1 then it is up to us | |
2767 | to pick a sane default. The default we choose is 1, this is the | |
2768 | CIE version gas has produced for a long time, and there seems no | |
2769 | reason to change it yet. */ | |
2770 | if (flag_dwarf_cie_version == -1) | |
2771 | flag_dwarf_cie_version = 1; | |
1e9cc1c2 NC |
2772 | } |
2773 | ||
c6cb92c5 | 2774 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
edc7a80a | 2775 | were any .file/.loc directives, or --gdwarf2 was given, and if the |
df1c40a7 L |
2776 | file has a non-empty .debug_info section and an empty .debug_line |
2777 | section. If we emit .debug_line, and the .debug_info section is | |
2778 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
2779 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
2780 | or --gdwarf2 was given and there were any located instructions | |
2781 | emitted. */ | |
c6cb92c5 | 2782 | |
fac0d250 | 2783 | void |
a2e22468 | 2784 | dwarf2_finish (void) |
fac0d250 | 2785 | { |
220e750f RH |
2786 | segT line_seg; |
2787 | struct line_seg *s; | |
c6cb92c5 NS |
2788 | segT info_seg; |
2789 | int emit_other_sections = 0; | |
df1c40a7 | 2790 | int empty_debug_line = 0; |
c6cb92c5 NS |
2791 | |
2792 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
2793 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 2794 | |
df1c40a7 L |
2795 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
2796 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
2797 | ||
2798 | /* We can't construct a new debug_line section if we already have one. | |
edc7a80a MW |
2799 | Give an error if we have seen any .loc, otherwise trust the user |
2800 | knows what they are doing and want to generate the .debug_line | |
2801 | (and all other debug sections) themselves. */ | |
2802 | if (all_segs && !empty_debug_line && dwarf2_any_loc_directive_seen) | |
df1c40a7 L |
2803 | as_fatal ("duplicate .debug_line sections"); |
2804 | ||
2805 | if ((!all_segs && emit_other_sections) | |
2806 | || (!emit_other_sections && !empty_debug_line)) | |
2807 | /* If there is no line information and no non-empty .debug_info | |
2808 | section, or if there is both a non-empty .debug_info and a non-empty | |
2809 | .debug_line, then we do nothing. */ | |
220e750f | 2810 | return; |
fac0d250 | 2811 | |
220e750f | 2812 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 2813 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 2814 | |
220e750f | 2815 | /* Create and switch to the line number section. */ |
edc7a80a MW |
2816 | if (empty_debug_line) |
2817 | { | |
2818 | line_seg = subseg_new (".debug_line", 0); | |
2819 | bfd_set_section_flags (line_seg, | |
2820 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2821 | } | |
fac0d250 | 2822 | |
220e750f | 2823 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 2824 | for (s = all_segs; s; s = s->next) |
fac0d250 | 2825 | { |
91d6fa6a NC |
2826 | struct line_subseg *lss = s->head; |
2827 | struct line_entry **ptail = lss->ptail; | |
220e750f | 2828 | |
62e6b7b3 AO |
2829 | /* Reset the initial view of the first subsection of the |
2830 | section. */ | |
2831 | if (lss->head && lss->head->loc.view) | |
2832 | set_or_check_view (lss->head, NULL, NULL); | |
2833 | ||
91d6fa6a | 2834 | while ((lss = lss->next) != NULL) |
220e750f | 2835 | { |
62e6b7b3 AO |
2836 | /* Link the first view of subsequent subsections to the |
2837 | previous view. */ | |
2838 | if (lss->head && lss->head->loc.view) | |
2839 | set_or_check_view (lss->head, | |
2840 | !s->head ? NULL : (struct line_entry *)ptail, | |
2841 | s->head ? s->head->head : NULL); | |
91d6fa6a NC |
2842 | *ptail = lss->head; |
2843 | ptail = lss->ptail; | |
220e750f | 2844 | } |
fac0d250 | 2845 | } |
85a39694 | 2846 | |
edc7a80a MW |
2847 | if (empty_debug_line) |
2848 | out_debug_line (line_seg); | |
85a39694 | 2849 | |
c6cb92c5 | 2850 | /* If this is assembler generated line info, and there is no |
49fced12 MW |
2851 | debug_info already, we need .debug_info, .debug_abbrev and |
2852 | .debug_str sections as well. */ | |
c6cb92c5 | 2853 | if (emit_other_sections) |
220e750f RH |
2854 | { |
2855 | segT abbrev_seg; | |
220e750f | 2856 | segT aranges_seg; |
49fced12 | 2857 | segT str_seg; |
bdd3b953 | 2858 | symbolS *name_sym, *comp_dir_sym, *producer_sym, *ranges_sym; |
4dc7ead9 | 2859 | |
9c2799c2 | 2860 | gas_assert (all_segs); |
7fd3924a | 2861 | |
220e750f RH |
2862 | info_seg = subseg_new (".debug_info", 0); |
2863 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
2864 | aranges_seg = subseg_new (".debug_aranges", 0); | |
49fced12 | 2865 | str_seg = subseg_new (".debug_str", 0); |
ef99799a | 2866 | |
61826503 CE |
2867 | bfd_set_section_flags (info_seg, |
2868 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2869 | bfd_set_section_flags (abbrev_seg, | |
2870 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2871 | bfd_set_section_flags (aranges_seg, | |
2872 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2873 | bfd_set_section_flags (str_seg, | |
2874 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2875 | | SEC_MERGE | SEC_STRINGS); | |
49fced12 | 2876 | str_seg->entsize = 1; |
ef99799a | 2877 | |
ee515fb7 | 2878 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 2879 | |
802f5d9e | 2880 | if (all_segs->next == NULL) |
bdd3b953 | 2881 | ranges_sym = NULL; |
802f5d9e NC |
2882 | else |
2883 | { | |
bdd3b953 MW |
2884 | if (DWARF2_VERSION < 5) |
2885 | { | |
2886 | segT ranges_seg = subseg_new (".debug_ranges", 0); | |
2887 | bfd_set_section_flags (ranges_seg, (SEC_READONLY | |
2888 | | SEC_DEBUGGING | |
2889 | | SEC_OCTETS)); | |
2890 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); | |
2891 | out_debug_ranges (ranges_seg, &ranges_sym); | |
2892 | } | |
2893 | else | |
2894 | { | |
2895 | segT rnglists_seg = subseg_new (".debug_rnglists", 0); | |
2896 | bfd_set_section_flags (rnglists_seg, (SEC_READONLY | |
2897 | | SEC_DEBUGGING | |
2898 | | SEC_OCTETS)); | |
2899 | out_debug_rnglists (rnglists_seg, &ranges_sym); | |
2900 | } | |
802f5d9e NC |
2901 | } |
2902 | ||
220e750f | 2903 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 2904 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
49fced12 | 2905 | out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym); |
bdd3b953 | 2906 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_sym, |
49fced12 | 2907 | name_sym, comp_dir_sym, producer_sym); |
220e750f | 2908 | } |
85a39694 | 2909 | } |
ba8826a8 AO |
2910 | |
2911 | /* Perform any deferred checks pertaining to debug information. */ | |
2912 | ||
2913 | void | |
2914 | dwarf2dbg_final_check (void) | |
2915 | { | |
2916 | /* Perform reset-view checks. Don't evaluate view_assert_failed | |
2917 | recursively: it could be very deep. It's a chain of adds, with | |
2918 | each chain element pointing to the next in X_add_symbol, and | |
2919 | holding the check value in X_op_symbol. */ | |
2920 | while (view_assert_failed) | |
2921 | { | |
723dfee7 | 2922 | expressionS *exp; |
ba8826a8 AO |
2923 | symbolS *sym; |
2924 | offsetT failed; | |
2925 | ||
2926 | gas_assert (!symbol_resolved_p (view_assert_failed)); | |
2927 | ||
723dfee7 | 2928 | exp = symbol_get_value_expression (view_assert_failed); |
ba8826a8 AO |
2929 | sym = view_assert_failed; |
2930 | ||
2931 | /* If view_assert_failed looks like a compound check in the | |
2932 | chain, break it up. */ | |
723dfee7 | 2933 | if (exp->X_op == O_add && exp->X_add_number == 0 && exp->X_unsigned) |
ba8826a8 | 2934 | { |
723dfee7 HPN |
2935 | view_assert_failed = exp->X_add_symbol; |
2936 | sym = exp->X_op_symbol; | |
ba8826a8 AO |
2937 | } |
2938 | else | |
2939 | view_assert_failed = NULL; | |
2940 | ||
2941 | failed = resolve_symbol_value (sym); | |
2942 | if (!symbol_resolved_p (sym) || failed) | |
2943 | { | |
2944 | as_bad (_("view number mismatch")); | |
2945 | break; | |
2946 | } | |
2947 | } | |
2948 | } |