Commit | Line | Data |
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fac0d250 | 1 | /* dwarf2dbg.c - DWARF2 debug support |
b3adc24a | 2 | Copyright (C) 1999-2020 Free Software Foundation, Inc. |
fac0d250 RH |
3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
fac0d250 RH |
10 | any later version. |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
fac0d250 | 21 | |
89b66cde | 22 | /* Logical line numbers can be controlled by the compiler via the |
bd0eb99b | 23 | following directives: |
fac0d250 RH |
24 | |
25 | .file FILENO "file.c" | |
ecea7679 | 26 | .loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \ |
92846e72 CC |
27 | [epilogue_begin] [is_stmt VALUE] [isa VALUE] \ |
28 | [discriminator VALUE] | |
bd0eb99b | 29 | */ |
fac0d250 | 30 | |
fac0d250 | 31 | #include "as.h" |
bd0eb99b | 32 | #include "safe-ctype.h" |
92eb7b32 | 33 | |
42dbf88c NC |
34 | #ifdef HAVE_LIMITS_H |
35 | #include <limits.h> | |
92625c16 | 36 | #else |
6717891c NC |
37 | #ifdef HAVE_SYS_PARAM_H |
38 | #include <sys/param.h> | |
39 | #endif | |
6256f9dd | 40 | #ifndef INT_MAX |
ee515fb7 | 41 | #define INT_MAX (int) (((unsigned) (-1)) >> 1) |
42dbf88c | 42 | #endif |
b8f080d6 | 43 | #endif |
42dbf88c | 44 | |
70658493 | 45 | #include "dwarf2dbg.h" |
a7ed1ca2 | 46 | #include <filenames.h> |
70658493 | 47 | |
56487c55 NC |
48 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
49 | /* We need to decide which character to use as a directory separator. | |
50 | Just because HAVE_DOS_BASED_FILE_SYSTEM is defined, it does not | |
51 | necessarily mean that the backslash character is the one to use. | |
52 | Some environments, eg Cygwin, can support both naming conventions. | |
53 | So we use the heuristic that we only need to use the backslash if | |
54 | the path is an absolute path starting with a DOS style drive | |
55 | selector. eg C: or D: */ | |
56 | # define INSERT_DIR_SEPARATOR(string, offset) \ | |
57 | do \ | |
58 | { \ | |
59 | if (offset > 1 \ | |
7fd3924a AM |
60 | && string[0] != 0 \ |
61 | && string[1] == ':') \ | |
56487c55 NC |
62 | string [offset] = '\\'; \ |
63 | else \ | |
64 | string [offset] = '/'; \ | |
65 | } \ | |
66 | while (0) | |
67 | #else | |
68 | # define INSERT_DIR_SEPARATOR(string, offset) string[offset] = '/' | |
69 | #endif | |
70 | ||
14e777e0 | 71 | #ifndef DWARF2_FORMAT |
413a266c | 72 | # define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
14e777e0 KB |
73 | #endif |
74 | ||
9605f328 | 75 | #ifndef DWARF2_ADDR_SIZE |
e4475e39 | 76 | # define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
9605f328 AO |
77 | #endif |
78 | ||
01e1a5bc NC |
79 | #ifndef DWARF2_FILE_NAME |
80 | #define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME | |
81 | #endif | |
82 | ||
83 | #ifndef DWARF2_FILE_TIME_NAME | |
5496f3c6 | 84 | #define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
85 | #endif |
86 | ||
87 | #ifndef DWARF2_FILE_SIZE_NAME | |
5496f3c6 | 88 | #define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) -1 |
01e1a5bc NC |
89 | #endif |
90 | ||
fc0eebac | 91 | #ifndef DWARF2_VERSION |
31bf1864 | 92 | #define DWARF2_VERSION dwarf_level |
fc0eebac TG |
93 | #endif |
94 | ||
88ebb0a1 MW |
95 | /* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */ |
96 | #ifndef DWARF2_ARANGES_VERSION | |
97 | #define DWARF2_ARANGES_VERSION 2 | |
98 | #endif | |
99 | ||
8acbe8ff | 100 | /* This implementation outputs version 3 .debug_line information. */ |
88ebb0a1 | 101 | #ifndef DWARF2_LINE_VERSION |
5496f3c6 | 102 | #define DWARF2_LINE_VERSION (dwarf_level > 3 ? dwarf_level : 3) |
88ebb0a1 MW |
103 | #endif |
104 | ||
fac0d250 RH |
105 | #include "subsegs.h" |
106 | ||
fa8f86ff | 107 | #include "dwarf2.h" |
fac0d250 | 108 | |
fac0d250 RH |
109 | /* Since we can't generate the prolog until the body is complete, we |
110 | use three different subsegments for .debug_line: one holding the | |
111 | prolog, one for the directory and filename info, and one for the | |
112 | body ("statement program"). */ | |
113 | #define DL_PROLOG 0 | |
114 | #define DL_FILES 1 | |
115 | #define DL_BODY 2 | |
116 | ||
1737851b BW |
117 | /* If linker relaxation might change offsets in the code, the DWARF special |
118 | opcodes and variable-length operands cannot be used. If this macro is | |
119 | nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */ | |
120 | #ifndef DWARF2_USE_FIXED_ADVANCE_PC | |
453dc3f0 | 121 | # define DWARF2_USE_FIXED_ADVANCE_PC linkrelax |
1737851b BW |
122 | #endif |
123 | ||
33eaf5de | 124 | /* First special line opcode - leave room for the standard opcodes. |
fac0d250 RH |
125 | Note: If you want to change this, you'll have to update the |
126 | "standard_opcode_lengths" table that is emitted below in | |
bd0eb99b RH |
127 | out_debug_line(). */ |
128 | #define DWARF2_LINE_OPCODE_BASE 13 | |
fac0d250 RH |
129 | |
130 | #ifndef DWARF2_LINE_BASE | |
131 | /* Minimum line offset in a special line info. opcode. This value | |
132 | was chosen to give a reasonable range of values. */ | |
133 | # define DWARF2_LINE_BASE -5 | |
134 | #endif | |
135 | ||
136 | /* Range of line offsets in a special line info. opcode. */ | |
137 | #ifndef DWARF2_LINE_RANGE | |
138 | # define DWARF2_LINE_RANGE 14 | |
139 | #endif | |
140 | ||
141 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH | |
142 | /* Define the architecture-dependent minimum instruction length (in | |
143 | bytes). This value should be rather too small than too big. */ | |
4dc7ead9 | 144 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
fac0d250 RH |
145 | #endif |
146 | ||
bd0eb99b | 147 | /* Flag that indicates the initial value of the is_stmt_start flag. */ |
fac0d250 RH |
148 | #define DWARF2_LINE_DEFAULT_IS_STMT 1 |
149 | ||
5496f3c6 NC |
150 | #ifndef DWARF2_LINE_MAX_OPS_PER_INSN |
151 | #define DWARF2_LINE_MAX_OPS_PER_INSN 1 | |
152 | #endif | |
153 | ||
cb30237e | 154 | /* Given a special op, return the line skip amount. */ |
fac0d250 RH |
155 | #define SPECIAL_LINE(op) \ |
156 | (((op) - DWARF2_LINE_OPCODE_BASE)%DWARF2_LINE_RANGE + DWARF2_LINE_BASE) | |
157 | ||
158 | /* Given a special op, return the address skip amount (in units of | |
159 | DWARF2_LINE_MIN_INSN_LENGTH. */ | |
160 | #define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) | |
161 | ||
cb30237e | 162 | /* The maximum address skip amount that can be encoded with a special op. */ |
fac0d250 RH |
163 | #define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) |
164 | ||
62ebcb5c AM |
165 | #ifndef TC_PARSE_CONS_RETURN_NONE |
166 | #define TC_PARSE_CONS_RETURN_NONE BFD_RELOC_NONE | |
167 | #endif | |
168 | ||
ba8826a8 AO |
169 | struct line_entry |
170 | { | |
220e750f | 171 | struct line_entry *next; |
07a53e5c | 172 | symbolS *label; |
220e750f | 173 | struct dwarf2_line_info loc; |
e6c774b4 | 174 | }; |
fac0d250 | 175 | |
ba8826a8 AO |
176 | /* Don't change the offset of next in line_entry. set_or_check_view |
177 | calls in dwarf2_gen_line_info_1 depend on it. */ | |
178 | static char unused[offsetof(struct line_entry, next) ? -1 : 1] | |
179 | ATTRIBUTE_UNUSED; | |
180 | ||
181 | struct line_subseg | |
182 | { | |
220e750f RH |
183 | struct line_subseg *next; |
184 | subsegT subseg; | |
185 | struct line_entry *head; | |
186 | struct line_entry **ptail; | |
e410add4 | 187 | struct line_entry **pmove_tail; |
220e750f | 188 | }; |
353e2c69 | 189 | |
ba8826a8 AO |
190 | struct line_seg |
191 | { | |
220e750f RH |
192 | struct line_seg *next; |
193 | segT seg; | |
194 | struct line_subseg *head; | |
195 | symbolS *text_start; | |
196 | symbolS *text_end; | |
197 | }; | |
198 | ||
199 | /* Collects data for all line table entries during assembly. */ | |
200 | static struct line_seg *all_segs; | |
1e9cc1c2 | 201 | static struct line_seg **last_seg_ptr; |
220e750f | 202 | |
5496f3c6 NC |
203 | #define NUM_MD5_BYTES 16 |
204 | ||
ba8826a8 AO |
205 | struct file_entry |
206 | { | |
5496f3c6 NC |
207 | const char * filename; |
208 | unsigned int dir; | |
209 | unsigned char md5[NUM_MD5_BYTES]; | |
220e750f RH |
210 | }; |
211 | ||
212 | /* Table of files used by .debug_line. */ | |
213 | static struct file_entry *files; | |
214 | static unsigned int files_in_use; | |
215 | static unsigned int files_allocated; | |
216 | ||
a7ed1ca2 | 217 | /* Table of directories used by .debug_line. */ |
5496f3c6 NC |
218 | static char ** dirs = NULL; |
219 | static unsigned int dirs_in_use = 0; | |
220 | static unsigned int dirs_allocated = 0; | |
a7ed1ca2 | 221 | |
b34976b6 | 222 | /* TRUE when we've seen a .loc directive recently. Used to avoid |
220e750f | 223 | doing work when there's nothing to do. */ |
1eee4adc | 224 | bfd_boolean dwarf2_loc_directive_seen; |
220e750f | 225 | |
07a53e5c RH |
226 | /* TRUE when we're supposed to set the basic block mark whenever a |
227 | label is seen. */ | |
228 | bfd_boolean dwarf2_loc_mark_labels; | |
229 | ||
220e750f | 230 | /* Current location as indicated by the most recent .loc directive. */ |
ba8826a8 AO |
231 | static struct dwarf2_line_info current = |
232 | { | |
bd0eb99b | 233 | 1, 1, 0, 0, |
92846e72 | 234 | DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, |
ba8826a8 | 235 | 0, NULL |
bd0eb99b | 236 | }; |
220e750f | 237 | |
ba8826a8 AO |
238 | /* This symbol is used to recognize view number forced resets in loc |
239 | lists. */ | |
240 | static symbolS *force_reset_view; | |
241 | ||
242 | /* This symbol evaluates to an expression that, if nonzero, indicates | |
243 | some view assert check failed. */ | |
244 | static symbolS *view_assert_failed; | |
245 | ||
220e750f RH |
246 | /* The size of an address on the target. */ |
247 | static unsigned int sizeof_address; | |
248 | \f | |
c5c0a210 | 249 | #ifndef TC_DWARF2_EMIT_OFFSET |
802f5d9e | 250 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset |
c5c0a210 | 251 | |
6174d9c8 RH |
252 | /* Create an offset to .dwarf2_*. */ |
253 | ||
254 | static void | |
a2e22468 | 255 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) |
6174d9c8 | 256 | { |
91d6fa6a | 257 | expressionS exp; |
6174d9c8 | 258 | |
031e3350 | 259 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
260 | exp.X_op = O_symbol; |
261 | exp.X_add_symbol = symbol; | |
262 | exp.X_add_number = 0; | |
263 | emit_expr (&exp, size); | |
6174d9c8 | 264 | } |
c5c0a210 | 265 | #endif |
6174d9c8 | 266 | |
e410add4 | 267 | /* Find or create (if CREATE_P) an entry for SEG+SUBSEG in ALL_SEGS. */ |
220e750f RH |
268 | |
269 | static struct line_subseg * | |
e410add4 | 270 | get_line_subseg (segT seg, subsegT subseg, bfd_boolean create_p) |
220e750f | 271 | { |
5f3fd8b4 | 272 | struct line_seg *s = seg_info (seg)->dwarf2_line_seg; |
91d6fa6a | 273 | struct line_subseg **pss, *lss; |
fac0d250 | 274 | |
1e9cc1c2 NC |
275 | if (s == NULL) |
276 | { | |
e410add4 RS |
277 | if (!create_p) |
278 | return NULL; | |
279 | ||
325801bd | 280 | s = XNEW (struct line_seg); |
1e9cc1c2 NC |
281 | s->next = NULL; |
282 | s->seg = seg; | |
283 | s->head = NULL; | |
284 | *last_seg_ptr = s; | |
285 | last_seg_ptr = &s->next; | |
5f3fd8b4 | 286 | seg_info (seg)->dwarf2_line_seg = s; |
1e9cc1c2 | 287 | } |
5496f3c6 | 288 | |
1e9cc1c2 | 289 | gas_assert (seg == s->seg); |
220e750f | 290 | |
91d6fa6a | 291 | for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next) |
fac0d250 | 292 | { |
91d6fa6a | 293 | if (lss->subseg == subseg) |
ee515fb7 | 294 | goto found_subseg; |
91d6fa6a | 295 | if (lss->subseg > subseg) |
220e750f | 296 | break; |
fac0d250 | 297 | } |
220e750f | 298 | |
325801bd | 299 | lss = XNEW (struct line_subseg); |
91d6fa6a NC |
300 | lss->next = *pss; |
301 | lss->subseg = subseg; | |
302 | lss->head = NULL; | |
303 | lss->ptail = &lss->head; | |
e410add4 | 304 | lss->pmove_tail = &lss->head; |
91d6fa6a | 305 | *pss = lss; |
220e750f RH |
306 | |
307 | found_subseg: | |
91d6fa6a | 308 | return lss; |
fac0d250 RH |
309 | } |
310 | ||
ba8826a8 AO |
311 | /* (Un)reverse the line_entry list starting from H. */ |
312 | ||
313 | static struct line_entry * | |
314 | reverse_line_entry_list (struct line_entry *h) | |
315 | { | |
316 | struct line_entry *p = NULL, *e, *n; | |
317 | ||
318 | for (e = h; e; e = n) | |
319 | { | |
320 | n = e->next; | |
321 | e->next = p; | |
322 | p = e; | |
323 | } | |
324 | return p; | |
325 | } | |
326 | ||
327 | /* Compute the view for E based on the previous entry P. If we | |
328 | introduce an (undefined) view symbol for P, and H is given (P must | |
329 | be the tail in this case), introduce view symbols for earlier list | |
330 | entries as well, until one of them is constant. */ | |
331 | ||
332 | static void | |
333 | set_or_check_view (struct line_entry *e, struct line_entry *p, | |
334 | struct line_entry *h) | |
335 | { | |
336 | expressionS viewx; | |
337 | ||
338 | memset (&viewx, 0, sizeof (viewx)); | |
339 | viewx.X_unsigned = 1; | |
340 | ||
341 | /* First, compute !(E->label > P->label), to tell whether or not | |
342 | we're to reset the view number. If we can't resolve it to a | |
343 | constant, keep it symbolic. */ | |
344 | if (!p || (e->loc.view == force_reset_view && force_reset_view)) | |
345 | { | |
346 | viewx.X_op = O_constant; | |
347 | viewx.X_add_number = 0; | |
348 | viewx.X_add_symbol = NULL; | |
349 | viewx.X_op_symbol = NULL; | |
350 | } | |
351 | else | |
352 | { | |
353 | viewx.X_op = O_gt; | |
354 | viewx.X_add_number = 0; | |
355 | viewx.X_add_symbol = e->label; | |
356 | viewx.X_op_symbol = p->label; | |
357 | resolve_expression (&viewx); | |
358 | if (viewx.X_op == O_constant) | |
359 | viewx.X_add_number = !viewx.X_add_number; | |
360 | else | |
361 | { | |
362 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
363 | viewx.X_add_number = 0; | |
364 | viewx.X_op_symbol = NULL; | |
365 | viewx.X_op = O_logical_not; | |
366 | } | |
367 | } | |
368 | ||
369 | if (S_IS_DEFINED (e->loc.view) && symbol_constant_p (e->loc.view)) | |
370 | { | |
371 | expressionS *value = symbol_get_value_expression (e->loc.view); | |
372 | /* We can't compare the view numbers at this point, because in | |
373 | VIEWX we've only determined whether we're to reset it so | |
374 | far. */ | |
375 | if (viewx.X_op == O_constant) | |
376 | { | |
377 | if (!value->X_add_number != !viewx.X_add_number) | |
378 | as_bad (_("view number mismatch")); | |
379 | } | |
380 | /* Record the expression to check it later. It is the result of | |
381 | a logical not, thus 0 or 1. We just add up all such deferred | |
382 | expressions, and resolve it at the end. */ | |
383 | else if (!value->X_add_number) | |
384 | { | |
385 | symbolS *deferred = make_expr_symbol (&viewx); | |
386 | if (view_assert_failed) | |
387 | { | |
388 | expressionS chk; | |
031e3350 | 389 | |
ba8826a8 AO |
390 | memset (&chk, 0, sizeof (chk)); |
391 | chk.X_unsigned = 1; | |
392 | chk.X_op = O_add; | |
393 | chk.X_add_number = 0; | |
394 | chk.X_add_symbol = view_assert_failed; | |
395 | chk.X_op_symbol = deferred; | |
396 | deferred = make_expr_symbol (&chk); | |
397 | } | |
398 | view_assert_failed = deferred; | |
399 | } | |
400 | } | |
401 | ||
402 | if (viewx.X_op != O_constant || viewx.X_add_number) | |
403 | { | |
404 | expressionS incv; | |
405 | ||
406 | if (!p->loc.view) | |
407 | { | |
408 | p->loc.view = symbol_temp_make (); | |
409 | gas_assert (!S_IS_DEFINED (p->loc.view)); | |
410 | } | |
411 | ||
412 | memset (&incv, 0, sizeof (incv)); | |
413 | incv.X_unsigned = 1; | |
414 | incv.X_op = O_symbol; | |
415 | incv.X_add_symbol = p->loc.view; | |
416 | incv.X_add_number = 1; | |
417 | ||
418 | if (viewx.X_op == O_constant) | |
419 | { | |
420 | gas_assert (viewx.X_add_number == 1); | |
421 | viewx = incv; | |
422 | } | |
423 | else | |
424 | { | |
425 | viewx.X_add_symbol = make_expr_symbol (&viewx); | |
426 | viewx.X_add_number = 0; | |
427 | viewx.X_op_symbol = make_expr_symbol (&incv); | |
428 | viewx.X_op = O_multiply; | |
429 | } | |
430 | } | |
431 | ||
432 | if (!S_IS_DEFINED (e->loc.view)) | |
433 | { | |
434 | symbol_set_value_expression (e->loc.view, &viewx); | |
38cf168b | 435 | S_SET_SEGMENT (e->loc.view, expr_section); |
ba8826a8 AO |
436 | symbol_set_frag (e->loc.view, &zero_address_frag); |
437 | } | |
438 | ||
439 | /* Define and attempt to simplify any earlier views needed to | |
440 | compute E's. */ | |
441 | if (h && p && p->loc.view && !S_IS_DEFINED (p->loc.view)) | |
442 | { | |
443 | struct line_entry *h2; | |
444 | /* Reverse the list to avoid quadratic behavior going backwards | |
445 | in a single-linked list. */ | |
446 | struct line_entry *r = reverse_line_entry_list (h); | |
447 | ||
448 | gas_assert (r == p); | |
449 | /* Set or check views until we find a defined or absent view. */ | |
450 | do | |
62e6b7b3 AO |
451 | { |
452 | /* Do not define the head of a (sub?)segment view while | |
453 | handling others. It would be defined too early, without | |
454 | regard to the last view of other subsegments. | |
455 | set_or_check_view will be called for every head segment | |
456 | that needs it. */ | |
457 | if (r == h) | |
458 | break; | |
459 | set_or_check_view (r, r->next, NULL); | |
460 | } | |
ba8826a8 AO |
461 | while (r->next && r->next->loc.view && !S_IS_DEFINED (r->next->loc.view) |
462 | && (r = r->next)); | |
463 | ||
464 | /* Unreverse the list, so that we can go forward again. */ | |
465 | h2 = reverse_line_entry_list (p); | |
466 | gas_assert (h2 == h); | |
467 | ||
468 | /* Starting from the last view we just defined, attempt to | |
469 | simplify the view expressions, until we do so to P. */ | |
470 | do | |
471 | { | |
62e6b7b3 AO |
472 | /* The head view of a subsegment may remain undefined while |
473 | handling other elements, before it is linked to the last | |
474 | view of the previous subsegment. */ | |
475 | if (r == h) | |
476 | continue; | |
ba8826a8 AO |
477 | gas_assert (S_IS_DEFINED (r->loc.view)); |
478 | resolve_expression (symbol_get_value_expression (r->loc.view)); | |
479 | } | |
480 | while (r != p && (r = r->next)); | |
481 | ||
482 | /* Now that we've defined and computed all earlier views that might | |
483 | be needed to compute E's, attempt to simplify it. */ | |
484 | resolve_expression (symbol_get_value_expression (e->loc.view)); | |
485 | } | |
486 | } | |
487 | ||
6a50d470 | 488 | /* Record an entry for LOC occurring at LABEL. */ |
07a53e5c RH |
489 | |
490 | static void | |
6a50d470 | 491 | dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) |
07a53e5c | 492 | { |
6a50d470 | 493 | struct line_subseg *lss; |
07a53e5c RH |
494 | struct line_entry *e; |
495 | ||
325801bd | 496 | e = XNEW (struct line_entry); |
07a53e5c | 497 | e->next = NULL; |
6a50d470 | 498 | e->label = label; |
07a53e5c RH |
499 | e->loc = *loc; |
500 | ||
e410add4 | 501 | lss = get_line_subseg (now_seg, now_subseg, TRUE); |
ba8826a8 | 502 | |
62e6b7b3 AO |
503 | /* Subseg heads are chained to previous subsegs in |
504 | dwarf2_finish. */ | |
505 | if (loc->view && lss->head) | |
ba8826a8 | 506 | set_or_check_view (e, |
62e6b7b3 | 507 | (struct line_entry *)lss->ptail, |
ba8826a8 AO |
508 | lss->head); |
509 | ||
6a50d470 RS |
510 | *lss->ptail = e; |
511 | lss->ptail = &e->next; | |
07a53e5c RH |
512 | } |
513 | ||
436d9e46 | 514 | /* Record an entry for LOC occurring at OFS within the current fragment. */ |
353e2c69 | 515 | |
220e750f | 516 | void |
a2e22468 | 517 | dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) |
fac0d250 | 518 | { |
1ea5c325 MS |
519 | static unsigned int line = -1; |
520 | static unsigned int filenum = -1; | |
220e750f | 521 | |
6a50d470 RS |
522 | symbolS *sym; |
523 | ||
220e750f | 524 | /* Early out for as-yet incomplete location information. */ |
5496f3c6 NC |
525 | if (loc->line == 0) |
526 | return; | |
527 | if (loc->filenum == 0 && DWARF2_LINE_VERSION < 5) | |
220e750f RH |
528 | return; |
529 | ||
ffa554ed GK |
530 | /* Don't emit sequences of line symbols for the same line when the |
531 | symbols apply to assembler code. It is necessary to emit | |
532 | duplicate line symbols when a compiler asks for them, because GDB | |
533 | uses them to determine the end of the prologue. */ | |
d1a6c242 | 534 | if (debug_type == DEBUG_DWARF2 |
ffa554ed | 535 | && line == loc->line && filenum == loc->filenum) |
1ea5c325 MS |
536 | return; |
537 | ||
538 | line = loc->line; | |
539 | filenum = loc->filenum; | |
540 | ||
453dc3f0 NC |
541 | if (linkrelax) |
542 | { | |
543 | char name[120]; | |
544 | ||
545 | /* Use a non-fake name for the line number location, | |
546 | so that it can be referred to by relocations. */ | |
547 | sprintf (name, ".Loc.%u.%u", line, filenum); | |
6a50d470 | 548 | sym = symbol_new (name, now_seg, ofs, frag_now); |
453dc3f0 NC |
549 | } |
550 | else | |
6a50d470 RS |
551 | sym = symbol_temp_new (now_seg, ofs, frag_now); |
552 | dwarf2_gen_line_info_1 (sym, loc); | |
220e750f | 553 | } |
fac0d250 | 554 | |
5496f3c6 NC |
555 | static const char * |
556 | get_basename (const char * pathname) | |
557 | { | |
558 | const char * file; | |
559 | ||
560 | file = lbasename (pathname); | |
561 | /* Don't make empty string from / or A: from A:/ . */ | |
562 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
563 | if (file <= pathname + 3) | |
564 | file = pathname; | |
565 | #else | |
566 | if (file == pathname + 1) | |
567 | file = pathname; | |
568 | #endif | |
569 | return file; | |
570 | } | |
571 | ||
572 | static unsigned int | |
573 | get_directory_table_entry (const char * dirname, | |
574 | size_t dirlen, | |
575 | bfd_boolean can_use_zero) | |
576 | { | |
577 | unsigned int d; | |
578 | ||
579 | if (dirlen == 0) | |
580 | return 0; | |
581 | ||
582 | #ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR | |
583 | if (IS_DIR_SEPARATOR (dirname[dirlen - 1])) | |
584 | { | |
585 | -- dirlen; | |
586 | if (dirlen == 0) | |
587 | return 0; | |
588 | } | |
589 | #endif | |
590 | ||
591 | for (d = 0; d < dirs_in_use; ++d) | |
592 | { | |
593 | if (dirs[d] != NULL | |
594 | && filename_ncmp (dirname, dirs[d], dirlen) == 0 | |
595 | && dirs[d][dirlen] == '\0') | |
596 | return d; | |
597 | } | |
598 | ||
599 | if (can_use_zero) | |
600 | { | |
601 | if (dirs == NULL || dirs[0] == NULL) | |
602 | d = 0; | |
603 | } | |
604 | else if (d == 0) | |
605 | d = 1; | |
606 | ||
607 | if (d >= dirs_allocated) | |
608 | { | |
609 | unsigned int old = dirs_allocated; | |
610 | ||
611 | dirs_allocated = d + 32; | |
612 | dirs = XRESIZEVEC (char *, dirs, dirs_allocated); | |
613 | memset (dirs + old, 0, (dirs_allocated - old) * sizeof (char *)); | |
614 | } | |
615 | ||
616 | dirs[d] = xmemdup0 (dirname, dirlen); | |
617 | if (dirs_in_use <= d) | |
618 | dirs_in_use = d + 1; | |
619 | ||
620 | return d; | |
621 | } | |
622 | ||
623 | /* Get a .debug_line file number for PATHNAME. If there is a | |
624 | directory component to PATHNAME, then this will be stored | |
625 | in the directory table, if it is not already present. | |
626 | Returns the slot number allocated to that filename or -1 | |
627 | if there was a problem. */ | |
628 | ||
629 | static signed int | |
630 | allocate_filenum (const char * pathname) | |
631 | { | |
632 | static signed int last_used = -1, last_used_dir_len = 0; | |
633 | const char *file; | |
634 | size_t dir_len; | |
635 | unsigned int i, dir; | |
636 | ||
637 | /* Short circuit the common case of adding the same pathname | |
638 | as last time. */ | |
639 | if (last_used != -1) | |
640 | { | |
641 | const char * dirname = NULL; | |
642 | ||
643 | if (dirs != NULL) | |
644 | dirname = dirs[files[last_used].dir]; | |
645 | ||
646 | if (dirname == NULL) | |
647 | { | |
648 | if (filename_cmp (pathname, files[last_used].filename) == 0) | |
649 | return last_used; | |
650 | } | |
651 | else | |
652 | { | |
653 | if (filename_ncmp (pathname, dirname, last_used_dir_len) == 0 | |
654 | && IS_DIR_SEPARATOR (pathname [last_used_dir_len]) | |
655 | && filename_cmp (pathname + last_used_dir_len + 1, | |
656 | files[last_used].filename) == 0) | |
657 | return last_used; | |
658 | } | |
659 | } | |
660 | ||
661 | file = get_basename (pathname); | |
662 | dir_len = file - pathname; | |
663 | ||
664 | dir = get_directory_table_entry (pathname, dir_len, FALSE); | |
665 | ||
666 | /* Do not use slot-0. That is specificailly reserved for use by | |
667 | the '.file 0 "name"' directive. */ | |
668 | for (i = 1; i < files_in_use; ++i) | |
669 | if (files[i].dir == dir | |
670 | && files[i].filename | |
671 | && filename_cmp (file, files[i].filename) == 0) | |
672 | { | |
673 | last_used = i; | |
674 | last_used_dir_len = dir_len; | |
675 | return i; | |
676 | } | |
677 | ||
678 | if (i >= files_allocated) | |
679 | { | |
680 | unsigned int old = files_allocated; | |
681 | ||
682 | files_allocated = i + 32; | |
683 | /* Catch wraparound. */ | |
684 | if (files_allocated <= old) | |
685 | { | |
686 | as_bad (_("file number %lu is too big"), (unsigned long) i); | |
687 | return -1; | |
688 | } | |
689 | ||
690 | files = XRESIZEVEC (struct file_entry, files, files_allocated); | |
691 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
692 | } | |
693 | ||
694 | files[i].filename = file; | |
695 | files[i].dir = dir; | |
696 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
697 | ||
698 | if (files_in_use < i + 1) | |
699 | files_in_use = i + 1; | |
700 | last_used = i; | |
701 | last_used_dir_len = dir_len; | |
702 | ||
703 | return i; | |
704 | } | |
705 | ||
706 | /* Allocate slot NUM in the .debug_line file table to FILENAME. | |
707 | If DIRNAME is not NULL or there is a directory component to FILENAME | |
708 | then this will be stored in the directory table, if not already present. | |
709 | if WITH_MD5 is TRUE then there is a md5 value in generic_bignum. | |
710 | Returns TRUE if allocation succeeded, FALSE otherwise. */ | |
711 | ||
712 | static bfd_boolean | |
713 | allocate_filename_to_slot (const char * dirname, | |
714 | const char * filename, | |
715 | unsigned int num, | |
716 | bfd_boolean with_md5) | |
717 | { | |
718 | const char *file; | |
719 | size_t dirlen; | |
720 | unsigned int i, d; | |
721 | ||
722 | /* Short circuit the common case of adding the same pathname | |
723 | as last time. */ | |
724 | if (num < files_allocated && files[num].filename != NULL) | |
725 | { | |
726 | const char * dir = NULL; | |
727 | ||
728 | if (dirs) | |
729 | dir = dirs[files[num].dir]; | |
730 | ||
731 | if (with_md5 | |
732 | && memcmp (generic_bignum, files[num].md5, NUM_MD5_BYTES) != 0) | |
733 | goto fail; | |
734 | ||
735 | if (dirname != NULL) | |
736 | { | |
737 | if (dir != NULL && filename_cmp (dir, dirname) != 0) | |
738 | goto fail; | |
739 | ||
740 | if (filename_cmp (filename, files[num].filename) != 0) | |
741 | goto fail; | |
742 | ||
743 | /* If the filenames match, but the directory table entry was | |
744 | empty, then fill it with the provided directory name. */ | |
745 | if (dir == NULL) | |
746 | dirs[files[num].dir] = xmemdup0 (dirname, strlen (dirname)); | |
747 | ||
748 | return TRUE; | |
749 | } | |
750 | else if (dir != NULL) | |
751 | { | |
752 | dirlen = strlen (dir); | |
753 | if (filename_ncmp (filename, dir, dirlen) == 0 | |
754 | && IS_DIR_SEPARATOR (filename [dirlen]) | |
755 | && filename_cmp (filename + dirlen + 1, files[num].filename) == 0) | |
756 | return TRUE; | |
757 | } | |
758 | else /* dir == NULL */ | |
759 | { | |
760 | file = get_basename (filename); | |
761 | if (filename_cmp (file, files[num].filename) == 0) | |
762 | { | |
763 | if (file > filename) | |
764 | /* The filenames match, but the directory table entry is empty. | |
765 | Fill it with the provided directory name. */ | |
766 | dirs[files[num].dir] = xmemdup0 (filename, file - filename); | |
767 | return TRUE; | |
768 | } | |
769 | } | |
770 | ||
771 | fail: | |
772 | as_bad (_("file table slot %u is already occupied by a different file (%s%s%s vs %s%s%s)"), | |
773 | num, | |
774 | dir == NULL ? "" : dir, | |
775 | dir == NULL ? "" : "/", | |
776 | files[num].filename, | |
777 | dirname == NULL ? "" : dirname, | |
778 | dirname == NULL ? "" : "/", | |
779 | filename); | |
780 | return FALSE; | |
781 | } | |
782 | ||
783 | if (dirname == NULL) | |
784 | { | |
785 | dirname = filename; | |
786 | file = get_basename (filename); | |
787 | dirlen = file - filename; | |
788 | } | |
789 | else | |
790 | { | |
791 | dirlen = strlen (dirname); | |
792 | file = filename; | |
793 | } | |
794 | ||
795 | d = get_directory_table_entry (dirname, dirlen, num == 0); | |
796 | i = num; | |
797 | ||
798 | if (i >= files_allocated) | |
799 | { | |
800 | unsigned int old = files_allocated; | |
801 | ||
802 | files_allocated = i + 32; | |
803 | /* Catch wraparound. */ | |
804 | if (files_allocated <= old) | |
805 | { | |
806 | as_bad (_("file number %lu is too big"), (unsigned long) i); | |
807 | return FALSE; | |
808 | } | |
809 | ||
810 | files = XRESIZEVEC (struct file_entry, files, files_allocated); | |
811 | memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); | |
812 | } | |
813 | ||
814 | files[i].filename = file; | |
815 | files[i].dir = d; | |
816 | if (with_md5) | |
817 | { | |
818 | if (target_big_endian) | |
819 | { | |
820 | /* md5's are stored in litte endian format. */ | |
821 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
822 | unsigned int byte = NUM_MD5_BYTES; | |
823 | unsigned int bignum_index = 0; | |
824 | ||
825 | while (bits_remaining) | |
826 | { | |
827 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
828 | valueT bignum_value = generic_bignum [bignum_index]; | |
829 | bignum_index ++; | |
830 | ||
831 | while (bignum_bits_remaining) | |
832 | { | |
833 | files[i].md5[--byte] = bignum_value & 0xff; | |
834 | bignum_value >>= 8; | |
835 | bignum_bits_remaining -= 8; | |
836 | bits_remaining -= 8; | |
837 | } | |
838 | } | |
839 | } | |
840 | else | |
841 | { | |
842 | unsigned int bits_remaining = NUM_MD5_BYTES * BITS_PER_CHAR; | |
843 | unsigned int byte = 0; | |
844 | unsigned int bignum_index = 0; | |
845 | ||
846 | while (bits_remaining) | |
847 | { | |
848 | unsigned int bignum_bits_remaining = LITTLENUM_NUMBER_OF_BITS; | |
849 | valueT bignum_value = generic_bignum [bignum_index]; | |
850 | ||
851 | bignum_index ++; | |
852 | ||
853 | while (bignum_bits_remaining) | |
854 | { | |
855 | files[i].md5[byte++] = bignum_value & 0xff; | |
856 | bignum_value >>= 8; | |
857 | bignum_bits_remaining -= 8; | |
858 | bits_remaining -= 8; | |
859 | } | |
860 | } | |
861 | } | |
862 | } | |
863 | else | |
864 | memset (files[i].md5, 0, NUM_MD5_BYTES); | |
865 | ||
866 | if (files_in_use < i + 1) | |
867 | files_in_use = i + 1; | |
868 | ||
869 | return TRUE; | |
870 | } | |
871 | ||
ecea7679 RH |
872 | /* Returns the current source information. If .file directives have |
873 | been encountered, the info for the corresponding source file is | |
874 | returned. Otherwise, the info for the assembly source file is | |
875 | returned. */ | |
876 | ||
220e750f | 877 | void |
a2e22468 | 878 | dwarf2_where (struct dwarf2_line_info *line) |
220e750f RH |
879 | { |
880 | if (debug_type == DEBUG_DWARF2) | |
fac0d250 | 881 | { |
ba8826a8 AO |
882 | const char *filename; |
883 | ||
884 | memset (line, 0, sizeof (*line)); | |
885 | filename = as_where (&line->line); | |
5496f3c6 NC |
886 | line->filenum = allocate_filenum (filename); |
887 | /* FIXME: We should check the return value from allocate_filenum. */ | |
220e750f | 888 | line->column = 0; |
bd0eb99b | 889 | line->flags = DWARF2_FLAG_IS_STMT; |
ecea7679 | 890 | line->isa = current.isa; |
92846e72 | 891 | line->discriminator = current.discriminator; |
ba8826a8 | 892 | line->view = NULL; |
fac0d250 | 893 | } |
220e750f RH |
894 | else |
895 | *line = current; | |
fac0d250 RH |
896 | } |
897 | ||
7fd3924a | 898 | /* A hook to allow the target backend to inform the line number state |
ecea7679 RH |
899 | machine of isa changes when assembler debug info is enabled. */ |
900 | ||
901 | void | |
902 | dwarf2_set_isa (unsigned int isa) | |
903 | { | |
904 | current.isa = isa; | |
905 | } | |
906 | ||
220e750f RH |
907 | /* Called for each machine instruction, or relatively atomic group of |
908 | machine instructions (ie built-in macro). The instruction or group | |
909 | is SIZE bytes in length. If dwarf2 line number generation is called | |
910 | for, emit a line statement appropriately. */ | |
353e2c69 | 911 | |
220e750f | 912 | void |
a2e22468 | 913 | dwarf2_emit_insn (int size) |
fac0d250 | 914 | { |
220e750f | 915 | struct dwarf2_line_info loc; |
fac0d250 | 916 | |
ba8826a8 AO |
917 | if (debug_type != DEBUG_DWARF2 |
918 | ? !dwarf2_loc_directive_seen | |
919 | : !seen_at_least_1_file ()) | |
220e750f | 920 | return; |
7fd3924a AM |
921 | |
922 | dwarf2_where (&loc); | |
b6675117 | 923 | |
71250b94 | 924 | dwarf2_gen_line_info ((frag_now_fix_octets () - size) / OCTETS_PER_BYTE, &loc); |
661ba50f BW |
925 | dwarf2_consume_line_info (); |
926 | } | |
927 | ||
e410add4 RS |
928 | /* Move all previously-emitted line entries for the current position by |
929 | DELTA bytes. This function cannot be used to move the same entries | |
930 | twice. */ | |
931 | ||
932 | void | |
933 | dwarf2_move_insn (int delta) | |
934 | { | |
935 | struct line_subseg *lss; | |
936 | struct line_entry *e; | |
937 | valueT now; | |
938 | ||
939 | if (delta == 0) | |
940 | return; | |
941 | ||
942 | lss = get_line_subseg (now_seg, now_subseg, FALSE); | |
943 | if (!lss) | |
944 | return; | |
945 | ||
946 | now = frag_now_fix (); | |
947 | while ((e = *lss->pmove_tail)) | |
948 | { | |
949 | if (S_GET_VALUE (e->label) == now) | |
950 | S_SET_VALUE (e->label, now + delta); | |
951 | lss->pmove_tail = &e->next; | |
952 | } | |
953 | } | |
954 | ||
661ba50f BW |
955 | /* Called after the current line information has been either used with |
956 | dwarf2_gen_line_info or saved with a machine instruction for later use. | |
957 | This resets the state of the line number information to reflect that | |
958 | it has been used. */ | |
959 | ||
960 | void | |
961 | dwarf2_consume_line_info (void) | |
962 | { | |
963 | /* Unless we generate DWARF2 debugging information for each | |
964 | assembler line, we only emit one line symbol for one LOC. */ | |
7fd3924a | 965 | dwarf2_loc_directive_seen = FALSE; |
bd0eb99b RH |
966 | |
967 | current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK | |
968 | | DWARF2_FLAG_PROLOGUE_END | |
969 | | DWARF2_FLAG_EPILOGUE_BEGIN); | |
92846e72 | 970 | current.discriminator = 0; |
3a00b02d | 971 | current.view = NULL; |
220e750f | 972 | } |
fac0d250 | 973 | |
07a53e5c RH |
974 | /* Called for each (preferably code) label. If dwarf2_loc_mark_labels |
975 | is enabled, emit a basic block marker. */ | |
976 | ||
977 | void | |
978 | dwarf2_emit_label (symbolS *label) | |
979 | { | |
980 | struct dwarf2_line_info loc; | |
981 | ||
982 | if (!dwarf2_loc_mark_labels) | |
983 | return; | |
984 | if (S_GET_SEGMENT (label) != now_seg) | |
985 | return; | |
fd361982 | 986 | if (!(bfd_section_flags (now_seg) & SEC_CODE)) |
07a53e5c | 987 | return; |
7fd3924a AM |
988 | if (files_in_use == 0 && debug_type != DEBUG_DWARF2) |
989 | return; | |
990 | ||
991 | dwarf2_where (&loc); | |
07a53e5c RH |
992 | |
993 | loc.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
994 | ||
6a50d470 | 995 | dwarf2_gen_line_info_1 (label, &loc); |
7fd3924a | 996 | dwarf2_consume_line_info (); |
07a53e5c RH |
997 | } |
998 | ||
ecb4347a DJ |
999 | /* Handle two forms of .file directive: |
1000 | - Pass .file "source.c" to s_app_file | |
1001 | - Handle .file 1 "source.c" by adding an entry to the DWARF-2 file table | |
220e750f | 1002 | |
68d20676 | 1003 | If an entry is added to the file table, return a pointer to the filename. */ |
ecb4347a DJ |
1004 | |
1005 | char * | |
68d20676 | 1006 | dwarf2_directive_filename (void) |
220e750f | 1007 | { |
5496f3c6 | 1008 | bfd_boolean with_md5 = TRUE; |
8f02ae5b | 1009 | valueT num; |
e46d99eb | 1010 | char *filename; |
5496f3c6 | 1011 | const char * dirname = NULL; |
220e750f RH |
1012 | int filename_len; |
1013 | ||
1014 | /* Continue to accept a bare string and pass it off. */ | |
1015 | SKIP_WHITESPACE (); | |
1016 | if (*input_line_pointer == '"') | |
fac0d250 | 1017 | { |
220e750f | 1018 | s_app_file (0); |
ecb4347a | 1019 | return NULL; |
fac0d250 RH |
1020 | } |
1021 | ||
220e750f | 1022 | num = get_absolute_expression (); |
220e750f | 1023 | |
5496f3c6 | 1024 | if ((offsetT) num < 1 && DWARF2_LINE_VERSION < 5) |
fac0d250 | 1025 | { |
0e389e77 | 1026 | as_bad (_("file number less than one")); |
84d9ab33 | 1027 | ignore_rest_of_line (); |
ecb4347a | 1028 | return NULL; |
fac0d250 RH |
1029 | } |
1030 | ||
5496f3c6 NC |
1031 | /* FIXME: Should we allow ".file <N>\n" as an expression meaning |
1032 | "switch back to the already allocated file <N> as the current | |
1033 | file" ? */ | |
84d9ab33 NC |
1034 | |
1035 | filename = demand_copy_C_string (&filename_len); | |
1036 | if (filename == NULL) | |
1037 | /* demand_copy_C_string will have already generated an error message. */ | |
1038 | return NULL; | |
1039 | ||
5496f3c6 NC |
1040 | /* For DWARF-5 support we also accept: |
1041 | .file <NUM> ["<dir>"] "<file>" [md5 <NUM>] */ | |
1042 | if (DWARF2_LINE_VERSION > 4) | |
1043 | { | |
1044 | SKIP_WHITESPACE (); | |
1045 | if (*input_line_pointer == '"') | |
1046 | { | |
1047 | dirname = filename; | |
1048 | filename = demand_copy_C_string (&filename_len); | |
1049 | SKIP_WHITESPACE (); | |
1050 | } | |
1051 | ||
1052 | if (strncmp (input_line_pointer, "md5", 3) == 0) | |
1053 | { | |
1054 | input_line_pointer += 3; | |
1055 | SKIP_WHITESPACE (); | |
1056 | ||
1057 | expressionS exp; | |
1058 | expression_and_evaluate (& exp); | |
1059 | if (exp.X_op != O_big) | |
1060 | as_bad (_("md5 value too small or not a constant")); | |
1061 | else | |
1062 | with_md5 = TRUE; | |
1063 | } | |
1064 | } | |
1065 | ||
84d9ab33 NC |
1066 | demand_empty_rest_of_line (); |
1067 | ||
7cadeb2c AM |
1068 | /* A .file directive implies compiler generated debug information is |
1069 | being supplied. Turn off gas generated debug info. */ | |
1070 | debug_type = DEBUG_NONE; | |
1071 | ||
8f02ae5b AM |
1072 | if (num != (unsigned int) num |
1073 | || num >= (size_t) -1 / sizeof (struct file_entry) - 32) | |
220e750f | 1074 | { |
8f02ae5b | 1075 | as_bad (_("file number %lu is too big"), (unsigned long) num); |
ecb4347a | 1076 | return NULL; |
249e3833 | 1077 | } |
220e750f | 1078 | |
5496f3c6 NC |
1079 | if (! allocate_filename_to_slot (dirname, filename, (unsigned int) num, |
1080 | with_md5)) | |
1081 | return NULL; | |
ecb4347a DJ |
1082 | |
1083 | return filename; | |
fac0d250 RH |
1084 | } |
1085 | ||
68d20676 NC |
1086 | /* Calls dwarf2_directive_filename, but discards its result. |
1087 | Used in pseudo-op tables where the function result is ignored. */ | |
1088 | ||
1089 | void | |
1090 | dwarf2_directive_file (int dummy ATTRIBUTE_UNUSED) | |
1091 | { | |
1092 | (void) dwarf2_directive_filename (); | |
1093 | } | |
1094 | ||
220e750f | 1095 | void |
a2e22468 | 1096 | dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) |
220e750f | 1097 | { |
ecea7679 RH |
1098 | offsetT filenum, line; |
1099 | ||
851feff8 DJ |
1100 | /* If we see two .loc directives in a row, force the first one to be |
1101 | output now. */ | |
7cadeb2c | 1102 | if (dwarf2_loc_directive_seen) |
6a50d470 | 1103 | dwarf2_emit_insn (0); |
851feff8 | 1104 | |
ecea7679 RH |
1105 | filenum = get_absolute_expression (); |
1106 | SKIP_WHITESPACE (); | |
1107 | line = get_absolute_expression (); | |
1108 | ||
1109 | if (filenum < 1) | |
1110 | { | |
5496f3c6 NC |
1111 | if (filenum != 0 || DWARF2_LINE_VERSION < 5) |
1112 | { | |
1113 | as_bad (_("file number less than one")); | |
1114 | return; | |
1115 | } | |
ecea7679 | 1116 | } |
5496f3c6 NC |
1117 | |
1118 | if (filenum >= (int) files_in_use || files[filenum].filename == NULL) | |
ecea7679 RH |
1119 | { |
1120 | as_bad (_("unassigned file number %ld"), (long) filenum); | |
1121 | return; | |
1122 | } | |
1123 | ||
1124 | current.filenum = filenum; | |
1125 | current.line = line; | |
92846e72 | 1126 | current.discriminator = 0; |
ecea7679 RH |
1127 | |
1128 | #ifndef NO_LISTING | |
1129 | if (listing) | |
1130 | { | |
1131 | if (files[filenum].dir) | |
1132 | { | |
1133 | size_t dir_len = strlen (dirs[files[filenum].dir]); | |
1134 | size_t file_len = strlen (files[filenum].filename); | |
add39d23 | 1135 | char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1); |
ecea7679 RH |
1136 | |
1137 | memcpy (cp, dirs[files[filenum].dir], dir_len); | |
56487c55 | 1138 | INSERT_DIR_SEPARATOR (cp, dir_len); |
ecea7679 RH |
1139 | memcpy (cp + dir_len + 1, files[filenum].filename, file_len); |
1140 | cp[dir_len + file_len + 1] = '\0'; | |
1141 | listing_source_file (cp); | |
e1fa0163 | 1142 | free (cp); |
ecea7679 RH |
1143 | } |
1144 | else | |
1145 | listing_source_file (files[filenum].filename); | |
1146 | listing_source_line (line); | |
1147 | } | |
1148 | #endif | |
1149 | ||
220e750f | 1150 | SKIP_WHITESPACE (); |
ecea7679 RH |
1151 | if (ISDIGIT (*input_line_pointer)) |
1152 | { | |
1153 | current.column = get_absolute_expression (); | |
1154 | SKIP_WHITESPACE (); | |
1155 | } | |
1156 | ||
1157 | while (ISALPHA (*input_line_pointer)) | |
220e750f | 1158 | { |
bd0eb99b RH |
1159 | char *p, c; |
1160 | offsetT value; | |
1161 | ||
d02603dc | 1162 | c = get_symbol_name (& p); |
bd0eb99b RH |
1163 | |
1164 | if (strcmp (p, "basic_block") == 0) | |
1165 | { | |
1166 | current.flags |= DWARF2_FLAG_BASIC_BLOCK; | |
1167 | *input_line_pointer = c; | |
1168 | } | |
1169 | else if (strcmp (p, "prologue_end") == 0) | |
1170 | { | |
1171 | current.flags |= DWARF2_FLAG_PROLOGUE_END; | |
1172 | *input_line_pointer = c; | |
1173 | } | |
1174 | else if (strcmp (p, "epilogue_begin") == 0) | |
1175 | { | |
1176 | current.flags |= DWARF2_FLAG_EPILOGUE_BEGIN; | |
1177 | *input_line_pointer = c; | |
1178 | } | |
1179 | else if (strcmp (p, "is_stmt") == 0) | |
1180 | { | |
d02603dc | 1181 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1182 | value = get_absolute_expression (); |
1183 | if (value == 0) | |
1184 | current.flags &= ~DWARF2_FLAG_IS_STMT; | |
1185 | else if (value == 1) | |
1186 | current.flags |= DWARF2_FLAG_IS_STMT; | |
1187 | else | |
ecea7679 RH |
1188 | { |
1189 | as_bad (_("is_stmt value not 0 or 1")); | |
1190 | return; | |
1191 | } | |
bd0eb99b RH |
1192 | } |
1193 | else if (strcmp (p, "isa") == 0) | |
1194 | { | |
d02603dc | 1195 | (void) restore_line_pointer (c); |
bd0eb99b | 1196 | value = get_absolute_expression (); |
ecea7679 | 1197 | if (value >= 0) |
bd0eb99b | 1198 | current.isa = value; |
ecea7679 RH |
1199 | else |
1200 | { | |
1201 | as_bad (_("isa number less than zero")); | |
1202 | return; | |
1203 | } | |
bd0eb99b | 1204 | } |
92846e72 CC |
1205 | else if (strcmp (p, "discriminator") == 0) |
1206 | { | |
d02603dc | 1207 | (void) restore_line_pointer (c); |
92846e72 CC |
1208 | value = get_absolute_expression (); |
1209 | if (value >= 0) | |
1210 | current.discriminator = value; | |
1211 | else | |
1212 | { | |
1213 | as_bad (_("discriminator less than zero")); | |
1214 | return; | |
1215 | } | |
1216 | } | |
ba8826a8 AO |
1217 | else if (strcmp (p, "view") == 0) |
1218 | { | |
1219 | symbolS *sym; | |
1220 | ||
1221 | (void) restore_line_pointer (c); | |
1222 | SKIP_WHITESPACE (); | |
1223 | ||
1224 | if (ISDIGIT (*input_line_pointer) | |
1225 | || *input_line_pointer == '-') | |
1226 | { | |
1227 | bfd_boolean force_reset = *input_line_pointer == '-'; | |
1228 | ||
1229 | value = get_absolute_expression (); | |
1230 | if (value != 0) | |
1231 | { | |
1232 | as_bad (_("numeric view can only be asserted to zero")); | |
1233 | return; | |
1234 | } | |
1235 | if (force_reset && force_reset_view) | |
1236 | sym = force_reset_view; | |
1237 | else | |
1238 | { | |
1239 | sym = symbol_temp_new (absolute_section, value, | |
1240 | &zero_address_frag); | |
1241 | if (force_reset) | |
1242 | force_reset_view = sym; | |
1243 | } | |
1244 | } | |
1245 | else | |
1246 | { | |
1247 | char *name = read_symbol_name (); | |
1248 | ||
1249 | if (!name) | |
1250 | return; | |
1251 | sym = symbol_find_or_make (name); | |
38cf168b | 1252 | if (S_IS_DEFINED (sym) || symbol_equated_p (sym)) |
ba8826a8 | 1253 | { |
38cf168b | 1254 | if (S_IS_VOLATILE (sym)) |
ba8826a8 | 1255 | sym = symbol_clone (sym, 1); |
38cf168b AM |
1256 | else if (!S_CAN_BE_REDEFINED (sym)) |
1257 | { | |
1258 | as_bad (_("symbol `%s' is already defined"), name); | |
1259 | return; | |
1260 | } | |
ba8826a8 | 1261 | } |
38cf168b AM |
1262 | S_SET_SEGMENT (sym, undefined_section); |
1263 | S_SET_VALUE (sym, 0); | |
1264 | symbol_set_frag (sym, &zero_address_frag); | |
ba8826a8 AO |
1265 | } |
1266 | current.view = sym; | |
1267 | } | |
bd0eb99b RH |
1268 | else |
1269 | { | |
ecea7679 | 1270 | as_bad (_("unknown .loc sub-directive `%s'"), p); |
d02603dc | 1271 | (void) restore_line_pointer (c); |
bd0eb99b RH |
1272 | return; |
1273 | } | |
1274 | ||
d02603dc | 1275 | SKIP_WHITESPACE_AFTER_NAME (); |
bd0eb99b RH |
1276 | } |
1277 | ||
1278 | demand_empty_rest_of_line (); | |
1eee4adc | 1279 | dwarf2_loc_directive_seen = TRUE; |
7cadeb2c | 1280 | debug_type = DEBUG_NONE; |
ba8826a8 AO |
1281 | |
1282 | /* If we were given a view id, emit the row right away. */ | |
1283 | if (current.view) | |
1284 | dwarf2_emit_insn (0); | |
220e750f | 1285 | } |
07a53e5c RH |
1286 | |
1287 | void | |
1288 | dwarf2_directive_loc_mark_labels (int dummy ATTRIBUTE_UNUSED) | |
1289 | { | |
1290 | offsetT value = get_absolute_expression (); | |
1291 | ||
1292 | if (value != 0 && value != 1) | |
1293 | { | |
1294 | as_bad (_("expected 0 or 1")); | |
1295 | ignore_rest_of_line (); | |
1296 | } | |
1297 | else | |
1298 | { | |
1299 | dwarf2_loc_mark_labels = value != 0; | |
1300 | demand_empty_rest_of_line (); | |
1301 | } | |
1302 | } | |
220e750f RH |
1303 | \f |
1304 | static struct frag * | |
a2e22468 | 1305 | first_frag_for_seg (segT seg) |
220e750f | 1306 | { |
c9049d30 | 1307 | return seg_info (seg)->frchainP->frch_root; |
220e750f RH |
1308 | } |
1309 | ||
1310 | static struct frag * | |
a2e22468 | 1311 | last_frag_for_seg (segT seg) |
220e750f | 1312 | { |
c9049d30 | 1313 | frchainS *f = seg_info (seg)->frchainP; |
220e750f | 1314 | |
c9049d30 AM |
1315 | while (f->frch_next != NULL) |
1316 | f = f->frch_next; | |
220e750f | 1317 | |
c9049d30 | 1318 | return f->frch_last; |
220e750f RH |
1319 | } |
1320 | \f | |
1321 | /* Emit a single byte into the current segment. */ | |
1322 | ||
1323 | static inline void | |
a2e22468 | 1324 | out_byte (int byte) |
220e750f RH |
1325 | { |
1326 | FRAG_APPEND_1_CHAR (byte); | |
1327 | } | |
1328 | ||
1329 | /* Emit a statement program opcode into the current segment. */ | |
1330 | ||
1331 | static inline void | |
a2e22468 | 1332 | out_opcode (int opc) |
220e750f RH |
1333 | { |
1334 | out_byte (opc); | |
1335 | } | |
1336 | ||
1337 | /* Emit a two-byte word into the current segment. */ | |
1338 | ||
1339 | static inline void | |
a2e22468 | 1340 | out_two (int data) |
220e750f RH |
1341 | { |
1342 | md_number_to_chars (frag_more (2), data, 2); | |
1343 | } | |
1344 | ||
1345 | /* Emit a four byte word into the current segment. */ | |
1346 | ||
1347 | static inline void | |
a2e22468 | 1348 | out_four (int data) |
220e750f RH |
1349 | { |
1350 | md_number_to_chars (frag_more (4), data, 4); | |
1351 | } | |
1352 | ||
1353 | /* Emit an unsigned "little-endian base 128" number. */ | |
1354 | ||
fac0d250 | 1355 | static void |
a2e22468 | 1356 | out_uleb128 (addressT value) |
220e750f RH |
1357 | { |
1358 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
1359 | } | |
1360 | ||
92846e72 CC |
1361 | /* Emit a signed "little-endian base 128" number. */ |
1362 | ||
1363 | static void | |
1364 | out_leb128 (addressT value) | |
1365 | { | |
1366 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
1367 | } | |
1368 | ||
220e750f RH |
1369 | /* Emit a tuple for .debug_abbrev. */ |
1370 | ||
1371 | static inline void | |
a2e22468 | 1372 | out_abbrev (int name, int form) |
fac0d250 | 1373 | { |
220e750f RH |
1374 | out_uleb128 (name); |
1375 | out_uleb128 (form); | |
1376 | } | |
fac0d250 | 1377 | |
220e750f | 1378 | /* Get the size of a fragment. */ |
fac0d250 | 1379 | |
220e750f | 1380 | static offsetT |
c9049d30 | 1381 | get_frag_fix (fragS *frag, segT seg) |
220e750f RH |
1382 | { |
1383 | frchainS *fr; | |
1384 | ||
1385 | if (frag->fr_next) | |
1386 | return frag->fr_fix; | |
1387 | ||
1388 | /* If a fragment is the last in the chain, special measures must be | |
1389 | taken to find its size before relaxation, since it may be pending | |
1390 | on some subsegment chain. */ | |
c9049d30 | 1391 | for (fr = seg_info (seg)->frchainP; fr; fr = fr->frch_next) |
220e750f | 1392 | if (fr->frch_last == frag) |
c5c0a210 | 1393 | return (char *) obstack_next_free (&fr->frch_obstack) - frag->fr_literal; |
220e750f RH |
1394 | |
1395 | abort (); | |
1396 | } | |
fac0d250 | 1397 | |
220e750f | 1398 | /* Set an absolute address (may result in a relocation entry). */ |
fac0d250 | 1399 | |
220e750f | 1400 | static void |
07a53e5c | 1401 | out_set_addr (symbolS *sym) |
220e750f | 1402 | { |
91d6fa6a | 1403 | expressionS exp; |
9e3af0e7 | 1404 | |
031e3350 | 1405 | memset (&exp, 0, sizeof exp); |
e2b9a97e CE |
1406 | out_opcode (DW_LNS_extended_op); |
1407 | out_uleb128 (sizeof_address + 1); | |
fac0d250 | 1408 | |
e2b9a97e | 1409 | out_opcode (DW_LNE_set_address); |
91d6fa6a NC |
1410 | exp.X_op = O_symbol; |
1411 | exp.X_add_symbol = sym; | |
1412 | exp.X_add_number = 0; | |
1413 | emit_expr (&exp, sizeof_address); | |
fac0d250 RH |
1414 | } |
1415 | ||
a2e22468 | 1416 | static void scale_addr_delta (addressT *); |
c8970b4b | 1417 | |
a3b75434 | 1418 | static void |
d7342424 | 1419 | scale_addr_delta (addressT *addr_delta) |
a3b75434 DD |
1420 | { |
1421 | static int printed_this = 0; | |
8fbf7334 | 1422 | if (DWARF2_LINE_MIN_INSN_LENGTH > 1) |
a3b75434 | 1423 | { |
8fbf7334 | 1424 | if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this) |
8f02ae5b | 1425 | { |
8fbf7334 | 1426 | as_bad("unaligned opcodes detected in executable segment"); |
8f02ae5b AM |
1427 | printed_this = 1; |
1428 | } | |
8fbf7334 | 1429 | *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH; |
a3b75434 | 1430 | } |
a3b75434 | 1431 | } |
a3b75434 | 1432 | |
220e750f RH |
1433 | /* Encode a pair of line and address skips as efficiently as possible. |
1434 | Note that the line skip is signed, whereas the address skip is unsigned. | |
353e2c69 | 1435 | |
220e750f RH |
1436 | The following two routines *must* be kept in sync. This is |
1437 | enforced by making emit_inc_line_addr abort if we do not emit | |
1438 | exactly the expected number of bytes. */ | |
1439 | ||
1440 | static int | |
a2e22468 | 1441 | size_inc_line_addr (int line_delta, addressT addr_delta) |
fac0d250 | 1442 | { |
220e750f RH |
1443 | unsigned int tmp, opcode; |
1444 | int len = 0; | |
fac0d250 | 1445 | |
220e750f | 1446 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 | 1447 | scale_addr_delta (&addr_delta); |
220e750f RH |
1448 | |
1449 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. | |
1450 | We cannot use special opcodes here, since we want the end_sequence | |
1451 | to emit the matrix entry. */ | |
1452 | if (line_delta == INT_MAX) | |
fac0d250 | 1453 | { |
220e750f RH |
1454 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1455 | len = 1; | |
62e6b7b3 | 1456 | else if (addr_delta) |
220e750f RH |
1457 | len = 1 + sizeof_leb128 (addr_delta, 0); |
1458 | return len + 3; | |
fac0d250 | 1459 | } |
fac0d250 | 1460 | |
220e750f RH |
1461 | /* Bias the line delta by the base. */ |
1462 | tmp = line_delta - DWARF2_LINE_BASE; | |
fac0d250 | 1463 | |
220e750f RH |
1464 | /* If the line increment is out of range of a special opcode, we |
1465 | must encode it with DW_LNS_advance_line. */ | |
1466 | if (tmp >= DWARF2_LINE_RANGE) | |
1467 | { | |
1468 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1469 | line_delta = 0; | |
1470 | tmp = 0 - DWARF2_LINE_BASE; | |
1471 | } | |
fac0d250 | 1472 | |
220e750f RH |
1473 | /* Bias the opcode by the special opcode base. */ |
1474 | tmp += DWARF2_LINE_OPCODE_BASE; | |
353e2c69 | 1475 | |
220e750f RH |
1476 | /* Avoid overflow when addr_delta is large. */ |
1477 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
1478 | { | |
1479 | /* Try using a special opcode. */ | |
1480 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1481 | if (opcode <= 255) | |
1482 | return len + 1; | |
1483 | ||
1484 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1485 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1486 | if (opcode <= 255) | |
1487 | return len + 2; | |
1488 | } | |
1489 | ||
1490 | /* Otherwise use DW_LNS_advance_pc. */ | |
1491 | len += 1 + sizeof_leb128 (addr_delta, 0); | |
1492 | ||
1493 | /* DW_LNS_copy or special opcode. */ | |
1494 | len += 1; | |
1495 | ||
1496 | return len; | |
1497 | } | |
fac0d250 | 1498 | |
220e750f | 1499 | static void |
a2e22468 | 1500 | emit_inc_line_addr (int line_delta, addressT addr_delta, char *p, int len) |
220e750f RH |
1501 | { |
1502 | unsigned int tmp, opcode; | |
1503 | int need_copy = 0; | |
1504 | char *end = p + len; | |
fac0d250 | 1505 | |
07a53e5c RH |
1506 | /* Line number sequences cannot go backward in addresses. This means |
1507 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1508 | gas_assert ((offsetT) addr_delta >= 0); |
07a53e5c | 1509 | |
220e750f | 1510 | /* Scale the address delta by the minimum instruction length. */ |
a3b75434 DD |
1511 | scale_addr_delta (&addr_delta); |
1512 | ||
220e750f RH |
1513 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. |
1514 | We cannot use special opcodes here, since we want the end_sequence | |
1515 | to emit the matrix entry. */ | |
1516 | if (line_delta == INT_MAX) | |
fac0d250 | 1517 | { |
220e750f RH |
1518 | if (addr_delta == MAX_SPECIAL_ADDR_DELTA) |
1519 | *p++ = DW_LNS_const_add_pc; | |
62e6b7b3 | 1520 | else if (addr_delta) |
fac0d250 | 1521 | { |
220e750f RH |
1522 | *p++ = DW_LNS_advance_pc; |
1523 | p += output_leb128 (p, addr_delta, 0); | |
fac0d250 | 1524 | } |
220e750f RH |
1525 | |
1526 | *p++ = DW_LNS_extended_op; | |
1527 | *p++ = 1; | |
1528 | *p++ = DW_LNE_end_sequence; | |
1529 | goto done; | |
fac0d250 RH |
1530 | } |
1531 | ||
220e750f RH |
1532 | /* Bias the line delta by the base. */ |
1533 | tmp = line_delta - DWARF2_LINE_BASE; | |
1534 | ||
1535 | /* If the line increment is out of range of a special opcode, we | |
1536 | must encode it with DW_LNS_advance_line. */ | |
1537 | if (tmp >= DWARF2_LINE_RANGE) | |
fac0d250 | 1538 | { |
220e750f RH |
1539 | *p++ = DW_LNS_advance_line; |
1540 | p += output_leb128 (p, line_delta, 1); | |
fac0d250 | 1541 | |
220e750f RH |
1542 | line_delta = 0; |
1543 | tmp = 0 - DWARF2_LINE_BASE; | |
1544 | need_copy = 1; | |
1545 | } | |
fac0d250 | 1546 | |
bd0eb99b RH |
1547 | /* Prettier, I think, to use DW_LNS_copy instead of a "line +0, addr +0" |
1548 | special opcode. */ | |
1549 | if (line_delta == 0 && addr_delta == 0) | |
1550 | { | |
1551 | *p++ = DW_LNS_copy; | |
1552 | goto done; | |
1553 | } | |
1554 | ||
220e750f RH |
1555 | /* Bias the opcode by the special opcode base. */ |
1556 | tmp += DWARF2_LINE_OPCODE_BASE; | |
fac0d250 | 1557 | |
220e750f RH |
1558 | /* Avoid overflow when addr_delta is large. */ |
1559 | if (addr_delta < 256 + MAX_SPECIAL_ADDR_DELTA) | |
fac0d250 | 1560 | { |
220e750f RH |
1561 | /* Try using a special opcode. */ |
1562 | opcode = tmp + addr_delta * DWARF2_LINE_RANGE; | |
1563 | if (opcode <= 255) | |
1564 | { | |
1565 | *p++ = opcode; | |
1566 | goto done; | |
1567 | } | |
1568 | ||
1569 | /* Try using DW_LNS_const_add_pc followed by special op. */ | |
1570 | opcode = tmp + (addr_delta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; | |
1571 | if (opcode <= 255) | |
fac0d250 | 1572 | { |
220e750f RH |
1573 | *p++ = DW_LNS_const_add_pc; |
1574 | *p++ = opcode; | |
1575 | goto done; | |
fac0d250 RH |
1576 | } |
1577 | } | |
220e750f RH |
1578 | |
1579 | /* Otherwise use DW_LNS_advance_pc. */ | |
1580 | *p++ = DW_LNS_advance_pc; | |
1581 | p += output_leb128 (p, addr_delta, 0); | |
1582 | ||
1583 | if (need_copy) | |
1584 | *p++ = DW_LNS_copy; | |
fac0d250 | 1585 | else |
220e750f | 1586 | *p++ = tmp; |
fac0d250 | 1587 | |
220e750f | 1588 | done: |
9c2799c2 | 1589 | gas_assert (p == end); |
220e750f | 1590 | } |
a8316fe2 | 1591 | |
220e750f | 1592 | /* Handy routine to combine calls to the above two routines. */ |
e1c05f12 | 1593 | |
220e750f | 1594 | static void |
a2e22468 | 1595 | out_inc_line_addr (int line_delta, addressT addr_delta) |
220e750f RH |
1596 | { |
1597 | int len = size_inc_line_addr (line_delta, addr_delta); | |
1598 | emit_inc_line_addr (line_delta, addr_delta, frag_more (len), len); | |
1599 | } | |
9de8d8f1 | 1600 | |
1737851b BW |
1601 | /* Write out an alternative form of line and address skips using |
1602 | DW_LNS_fixed_advance_pc opcodes. This uses more space than the default | |
7ddd14de BW |
1603 | line and address information, but it is required if linker relaxation |
1604 | could change the code offsets. The following two routines *must* be | |
1605 | kept in sync. */ | |
453dc3f0 | 1606 | #define ADDR_DELTA_LIMIT 50000 |
1737851b | 1607 | |
7ddd14de BW |
1608 | static int |
1609 | size_fixed_inc_line_addr (int line_delta, addressT addr_delta) | |
1737851b | 1610 | { |
7ddd14de | 1611 | int len = 0; |
1737851b BW |
1612 | |
1613 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ | |
7ddd14de BW |
1614 | if (line_delta != INT_MAX) |
1615 | len = 1 + sizeof_leb128 (line_delta, 1); | |
1616 | ||
453dc3f0 | 1617 | if (addr_delta > ADDR_DELTA_LIMIT) |
7ddd14de BW |
1618 | { |
1619 | /* DW_LNS_extended_op */ | |
1620 | len += 1 + sizeof_leb128 (sizeof_address + 1, 0); | |
1621 | /* DW_LNE_set_address */ | |
1622 | len += 1 + sizeof_address; | |
1623 | } | |
1624 | else | |
1625 | /* DW_LNS_fixed_advance_pc */ | |
1626 | len += 3; | |
1627 | ||
1737851b | 1628 | if (line_delta == INT_MAX) |
7ddd14de BW |
1629 | /* DW_LNS_extended_op + DW_LNE_end_sequence */ |
1630 | len += 3; | |
1631 | else | |
1632 | /* DW_LNS_copy */ | |
1633 | len += 1; | |
1634 | ||
1635 | return len; | |
1636 | } | |
1637 | ||
1638 | static void | |
1639 | emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag, | |
1640 | char *p, int len) | |
1641 | { | |
91d6fa6a | 1642 | expressionS *pexp; |
7ddd14de BW |
1643 | char *end = p + len; |
1644 | ||
1645 | /* Line number sequences cannot go backward in addresses. This means | |
1646 | we've incorrectly ordered the statements in the sequence. */ | |
9c2799c2 | 1647 | gas_assert ((offsetT) addr_delta >= 0); |
7ddd14de | 1648 | |
b40bf0a2 NC |
1649 | /* Verify that we have kept in sync with size_fixed_inc_line_addr. */ |
1650 | gas_assert (len == size_fixed_inc_line_addr (line_delta, addr_delta)); | |
1651 | ||
7ddd14de BW |
1652 | /* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */ |
1653 | if (line_delta != INT_MAX) | |
1654 | { | |
1655 | *p++ = DW_LNS_advance_line; | |
1656 | p += output_leb128 (p, line_delta, 1); | |
1657 | } | |
1658 | ||
91d6fa6a | 1659 | pexp = symbol_get_value_expression (frag->fr_symbol); |
7ddd14de BW |
1660 | |
1661 | /* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can | |
1662 | advance the address by at most 64K. Linker relaxation (without | |
1663 | which this function would not be used) could change the operand by | |
1664 | an unknown amount. If the address increment is getting close to | |
1665 | the limit, just reset the address. */ | |
453dc3f0 | 1666 | if (addr_delta > ADDR_DELTA_LIMIT) |
1737851b | 1667 | { |
7ddd14de | 1668 | symbolS *to_sym; |
91d6fa6a | 1669 | expressionS exp; |
7ddd14de | 1670 | |
031e3350 | 1671 | memset (&exp, 0, sizeof exp); |
9f6db0d3 | 1672 | gas_assert (pexp->X_op == O_subtract); |
91d6fa6a | 1673 | to_sym = pexp->X_add_symbol; |
7ddd14de BW |
1674 | |
1675 | *p++ = DW_LNS_extended_op; | |
1676 | p += output_leb128 (p, sizeof_address + 1, 0); | |
1677 | *p++ = DW_LNE_set_address; | |
91d6fa6a NC |
1678 | exp.X_op = O_symbol; |
1679 | exp.X_add_symbol = to_sym; | |
1680 | exp.X_add_number = 0; | |
62ebcb5c | 1681 | emit_expr_fix (&exp, sizeof_address, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de BW |
1682 | p += sizeof_address; |
1683 | } | |
1684 | else | |
1685 | { | |
1686 | *p++ = DW_LNS_fixed_advance_pc; | |
62ebcb5c | 1687 | emit_expr_fix (pexp, 2, frag, p, TC_PARSE_CONS_RETURN_NONE); |
7ddd14de | 1688 | p += 2; |
1737851b BW |
1689 | } |
1690 | ||
7ddd14de BW |
1691 | if (line_delta == INT_MAX) |
1692 | { | |
1693 | *p++ = DW_LNS_extended_op; | |
1694 | *p++ = 1; | |
1695 | *p++ = DW_LNE_end_sequence; | |
1696 | } | |
1697 | else | |
1698 | *p++ = DW_LNS_copy; | |
1737851b | 1699 | |
9c2799c2 | 1700 | gas_assert (p == end); |
1737851b BW |
1701 | } |
1702 | ||
220e750f RH |
1703 | /* Generate a variant frag that we can use to relax address/line |
1704 | increments between fragments of the target segment. */ | |
9e3af0e7 | 1705 | |
220e750f | 1706 | static void |
07a53e5c | 1707 | relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym) |
220e750f | 1708 | { |
91d6fa6a | 1709 | expressionS exp; |
220e750f | 1710 | int max_chars; |
6576f0b5 | 1711 | |
031e3350 | 1712 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
1713 | exp.X_op = O_subtract; |
1714 | exp.X_add_symbol = to_sym; | |
1715 | exp.X_op_symbol = from_sym; | |
1716 | exp.X_add_number = 0; | |
fac0d250 | 1717 | |
220e750f RH |
1718 | /* The maximum size of the frag is the line delta with a maximum |
1719 | sized address delta. */ | |
7ddd14de BW |
1720 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1721 | max_chars = size_fixed_inc_line_addr (line_delta, | |
1722 | -DWARF2_LINE_MIN_INSN_LENGTH); | |
1723 | else | |
1724 | max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH); | |
fac0d250 | 1725 | |
220e750f | 1726 | frag_var (rs_dwarf2dbg, max_chars, max_chars, 1, |
91d6fa6a | 1727 | make_expr_symbol (&exp), line_delta, NULL); |
220e750f | 1728 | } |
fac0d250 | 1729 | |
220e750f RH |
1730 | /* The function estimates the size of a rs_dwarf2dbg variant frag |
1731 | based on the current values of the symbols. It is called before | |
1732 | the relaxation loop. We set fr_subtype to the expected length. */ | |
fac0d250 | 1733 | |
220e750f | 1734 | int |
a2e22468 | 1735 | dwarf2dbg_estimate_size_before_relax (fragS *frag) |
220e750f RH |
1736 | { |
1737 | offsetT addr_delta; | |
1738 | int size; | |
fac0d250 | 1739 | |
6386f3a7 | 1740 | addr_delta = resolve_symbol_value (frag->fr_symbol); |
7ddd14de BW |
1741 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1742 | size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta); | |
1743 | else | |
1744 | size = size_inc_line_addr (frag->fr_offset, addr_delta); | |
fac0d250 | 1745 | |
220e750f | 1746 | frag->fr_subtype = size; |
fac0d250 | 1747 | |
220e750f RH |
1748 | return size; |
1749 | } | |
1750 | ||
1751 | /* This function relaxes a rs_dwarf2dbg variant frag based on the | |
1752 | current values of the symbols. fr_subtype is the current length | |
1753 | of the frag. This returns the change in frag length. */ | |
1754 | ||
1755 | int | |
a2e22468 | 1756 | dwarf2dbg_relax_frag (fragS *frag) |
220e750f RH |
1757 | { |
1758 | int old_size, new_size; | |
fac0d250 | 1759 | |
220e750f RH |
1760 | old_size = frag->fr_subtype; |
1761 | new_size = dwarf2dbg_estimate_size_before_relax (frag); | |
ee515fb7 | 1762 | |
220e750f | 1763 | return new_size - old_size; |
fac0d250 RH |
1764 | } |
1765 | ||
220e750f RH |
1766 | /* This function converts a rs_dwarf2dbg variant frag into a normal |
1767 | fill frag. This is called after all relaxation has been done. | |
1768 | fr_subtype will be the desired length of the frag. */ | |
1769 | ||
1770 | void | |
a2e22468 | 1771 | dwarf2dbg_convert_frag (fragS *frag) |
fac0d250 | 1772 | { |
220e750f RH |
1773 | offsetT addr_diff; |
1774 | ||
453dc3f0 NC |
1775 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1776 | { | |
2b0f3761 | 1777 | /* If linker relaxation is enabled then the distance between the two |
453dc3f0 NC |
1778 | symbols in the frag->fr_symbol expression might change. Hence we |
1779 | cannot rely upon the value computed by resolve_symbol_value. | |
1780 | Instead we leave the expression unfinalized and allow | |
1781 | emit_fixed_inc_line_addr to create a fixup (which later becomes a | |
1782 | relocation) that will allow the linker to correctly compute the | |
1783 | actual address difference. We have to use a fixed line advance for | |
1784 | this as we cannot (easily) relocate leb128 encoded values. */ | |
1785 | int saved_finalize_syms = finalize_syms; | |
1786 | ||
1787 | finalize_syms = 0; | |
1788 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
1789 | finalize_syms = saved_finalize_syms; | |
1790 | } | |
1791 | else | |
1792 | addr_diff = resolve_symbol_value (frag->fr_symbol); | |
fac0d250 | 1793 | |
220e750f RH |
1794 | /* fr_var carries the max_chars that we created the fragment with. |
1795 | fr_subtype carries the current expected length. We must, of | |
1796 | course, have allocated enough memory earlier. */ | |
9c2799c2 | 1797 | gas_assert (frag->fr_var >= (int) frag->fr_subtype); |
fac0d250 | 1798 | |
7ddd14de BW |
1799 | if (DWARF2_USE_FIXED_ADVANCE_PC) |
1800 | emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag, | |
1801 | frag->fr_literal + frag->fr_fix, | |
1802 | frag->fr_subtype); | |
1803 | else | |
1804 | emit_inc_line_addr (frag->fr_offset, addr_diff, | |
1805 | frag->fr_literal + frag->fr_fix, frag->fr_subtype); | |
220e750f RH |
1806 | |
1807 | frag->fr_fix += frag->fr_subtype; | |
1808 | frag->fr_type = rs_fill; | |
1809 | frag->fr_var = 0; | |
1810 | frag->fr_offset = 0; | |
1811 | } | |
1812 | ||
1813 | /* Generate .debug_line content for the chain of line number entries | |
1814 | beginning at E, for segment SEG. */ | |
1815 | ||
1816 | static void | |
a2e22468 | 1817 | process_entries (segT seg, struct line_entry *e) |
220e750f RH |
1818 | { |
1819 | unsigned filenum = 1; | |
1820 | unsigned line = 1; | |
1821 | unsigned column = 0; | |
bd0eb99b RH |
1822 | unsigned isa = 0; |
1823 | unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; | |
07a53e5c RH |
1824 | fragS *last_frag = NULL, *frag; |
1825 | addressT last_frag_ofs = 0, frag_ofs; | |
fead5cd9 | 1826 | symbolS *last_lab = NULL, *lab; |
220e750f RH |
1827 | struct line_entry *next; |
1828 | ||
b40bf0a2 NC |
1829 | if (flag_dwarf_sections) |
1830 | { | |
1831 | char * name; | |
1832 | const char * sec_name; | |
1833 | ||
2b0f3761 | 1834 | /* Switch to the relevant sub-section before we start to emit |
b40bf0a2 NC |
1835 | the line number table. |
1836 | ||
1837 | FIXME: These sub-sections do not have a normal Line Number | |
1838 | Program Header, thus strictly speaking they are not valid | |
1839 | DWARF sections. Unfortunately the DWARF standard assumes | |
1840 | a one-to-one relationship between compilation units and | |
1841 | line number tables. Thus we have to have a .debug_line | |
1842 | section, as well as our sub-sections, and we have to ensure | |
1843 | that all of the sub-sections are merged into a proper | |
1844 | .debug_line section before a debugger sees them. */ | |
3739860c | 1845 | |
fd361982 | 1846 | sec_name = bfd_section_name (seg); |
b40bf0a2 NC |
1847 | if (strcmp (sec_name, ".text") != 0) |
1848 | { | |
29a2809e | 1849 | name = concat (".debug_line", sec_name, (char *) NULL); |
b40bf0a2 NC |
1850 | subseg_set (subseg_get (name, FALSE), 0); |
1851 | } | |
1852 | else | |
1853 | /* Don't create a .debug_line.text section - | |
1854 | that is redundant. Instead just switch back to the | |
1855 | normal .debug_line section. */ | |
1856 | subseg_set (subseg_get (".debug_line", FALSE), 0); | |
1857 | } | |
1858 | ||
fead5cd9 | 1859 | do |
fac0d250 | 1860 | { |
07a53e5c | 1861 | int line_delta; |
220e750f RH |
1862 | |
1863 | if (filenum != e->loc.filenum) | |
fac0d250 | 1864 | { |
220e750f RH |
1865 | filenum = e->loc.filenum; |
1866 | out_opcode (DW_LNS_set_file); | |
1867 | out_uleb128 (filenum); | |
220e750f RH |
1868 | } |
1869 | ||
1870 | if (column != e->loc.column) | |
1871 | { | |
1872 | column = e->loc.column; | |
1873 | out_opcode (DW_LNS_set_column); | |
1874 | out_uleb128 (column); | |
220e750f RH |
1875 | } |
1876 | ||
92846e72 CC |
1877 | if (e->loc.discriminator != 0) |
1878 | { | |
1879 | out_opcode (DW_LNS_extended_op); | |
1880 | out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0)); | |
1881 | out_opcode (DW_LNE_set_discriminator); | |
1882 | out_uleb128 (e->loc.discriminator); | |
1883 | } | |
1884 | ||
bd0eb99b RH |
1885 | if (isa != e->loc.isa) |
1886 | { | |
1887 | isa = e->loc.isa; | |
1888 | out_opcode (DW_LNS_set_isa); | |
1889 | out_uleb128 (isa); | |
bd0eb99b RH |
1890 | } |
1891 | ||
1892 | if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT) | |
220e750f RH |
1893 | { |
1894 | flags = e->loc.flags; | |
1895 | out_opcode (DW_LNS_negate_stmt); | |
220e750f RH |
1896 | } |
1897 | ||
bd0eb99b | 1898 | if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK) |
07a53e5c | 1899 | out_opcode (DW_LNS_set_basic_block); |
220e750f | 1900 | |
bd0eb99b | 1901 | if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END) |
07a53e5c | 1902 | out_opcode (DW_LNS_set_prologue_end); |
bd0eb99b RH |
1903 | |
1904 | if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN) | |
07a53e5c | 1905 | out_opcode (DW_LNS_set_epilogue_begin); |
bd0eb99b | 1906 | |
fb81275c JM |
1907 | /* Don't try to optimize away redundant entries; gdb wants two |
1908 | entries for a function where the code starts on the same line as | |
1909 | the {, and there's no way to identify that case here. Trust gcc | |
1910 | to optimize appropriately. */ | |
07a53e5c RH |
1911 | line_delta = e->loc.line - line; |
1912 | lab = e->label; | |
1913 | frag = symbol_get_frag (lab); | |
1914 | frag_ofs = S_GET_VALUE (lab); | |
220e750f | 1915 | |
ba8826a8 AO |
1916 | if (last_frag == NULL |
1917 | || (e->loc.view == force_reset_view && force_reset_view | |
1918 | /* If we're going to reset the view, but we know we're | |
1919 | advancing the PC, we don't have to force with | |
1920 | set_address. We know we do when we're at the same | |
1921 | address of the same frag, and we know we might when | |
1922 | we're in the beginning of a frag, and we were at the | |
1923 | end of the previous frag. */ | |
1924 | && (frag == last_frag | |
1925 | ? (last_frag_ofs == frag_ofs) | |
1926 | : (frag_ofs == 0 | |
1927 | && ((offsetT)last_frag_ofs | |
1928 | >= get_frag_fix (last_frag, seg)))))) | |
220e750f | 1929 | { |
07a53e5c RH |
1930 | out_set_addr (lab); |
1931 | out_inc_line_addr (line_delta, 0); | |
220e750f | 1932 | } |
7ddd14de | 1933 | else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c RH |
1934 | out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs); |
1935 | else | |
1936 | relax_inc_line_addr (line_delta, lab, last_lab); | |
1937 | ||
1938 | line = e->loc.line; | |
1939 | last_lab = lab; | |
1940 | last_frag = frag; | |
1941 | last_frag_ofs = frag_ofs; | |
220e750f RH |
1942 | |
1943 | next = e->next; | |
1944 | free (e); | |
1945 | e = next; | |
fac0d250 | 1946 | } |
fead5cd9 | 1947 | while (e); |
353e2c69 | 1948 | |
220e750f | 1949 | /* Emit a DW_LNE_end_sequence for the end of the section. */ |
07a53e5c | 1950 | frag = last_frag_for_seg (seg); |
c9049d30 | 1951 | frag_ofs = get_frag_fix (frag, seg); |
7ddd14de | 1952 | if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC) |
07a53e5c | 1953 | out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs); |
220e750f | 1954 | else |
07a53e5c RH |
1955 | { |
1956 | lab = symbol_temp_new (seg, frag_ofs, frag); | |
1957 | relax_inc_line_addr (INT_MAX, lab, last_lab); | |
1958 | } | |
fac0d250 RH |
1959 | } |
1960 | ||
220e750f RH |
1961 | /* Emit the directory and file tables for .debug_line. */ |
1962 | ||
fac0d250 | 1963 | static void |
5496f3c6 | 1964 | out_dir_and_file_list (void) |
fac0d250 RH |
1965 | { |
1966 | size_t size; | |
3d6b762c | 1967 | const char *dir; |
fac0d250 | 1968 | char *cp; |
220e750f | 1969 | unsigned int i; |
5496f3c6 NC |
1970 | bfd_boolean emit_md5 = FALSE; |
1971 | bfd_boolean emit_timestamps = TRUE; | |
1972 | bfd_boolean emit_filesize = TRUE; | |
220e750f | 1973 | |
5496f3c6 NC |
1974 | /* Output the Directory Table. */ |
1975 | ||
1976 | if (DWARF2_LINE_VERSION >= 5) | |
1977 | { | |
1978 | out_byte (1); | |
1979 | out_uleb128 (DW_LNCT_path); | |
1980 | /* FIXME: it would be better to store these strings in | |
1981 | the .debug_line_str section and reference them here. */ | |
1982 | out_uleb128 (DW_FORM_string); | |
1983 | out_uleb128 (dirs_in_use); | |
1984 | } | |
1985 | ||
a7ed1ca2 | 1986 | /* Emit directory list. */ |
5496f3c6 NC |
1987 | if (DWARF2_LINE_VERSION >= 5) |
1988 | { | |
1989 | if (dirs[0] == NULL) | |
1990 | dir = remap_debug_filename ("."); | |
1991 | else | |
1992 | dir = remap_debug_filename (dirs[0]); | |
1993 | ||
1994 | size = strlen (dir) + 1; | |
1995 | cp = frag_more (size); | |
1996 | memcpy (cp, dir, size); | |
1997 | } | |
a7ed1ca2 NC |
1998 | for (i = 1; i < dirs_in_use; ++i) |
1999 | { | |
3d6b762c JM |
2000 | dir = remap_debug_filename (dirs[i]); |
2001 | size = strlen (dir) + 1; | |
a7ed1ca2 | 2002 | cp = frag_more (size); |
3d6b762c | 2003 | memcpy (cp, dir, size); |
a7ed1ca2 | 2004 | } |
fac0d250 | 2005 | |
5496f3c6 NC |
2006 | if (DWARF2_LINE_VERSION < 5) |
2007 | /* Terminate it. */ | |
2008 | out_byte ('\0'); | |
2009 | ||
2010 | /* Output the File Name Table. */ | |
2011 | ||
2012 | if (DWARF2_LINE_VERSION >= 5) | |
2013 | { | |
2014 | unsigned int columns = 4; | |
2015 | ||
2016 | if (((unsigned long) DWARF2_FILE_TIME_NAME ("", "")) == -1UL) | |
2017 | { | |
2018 | emit_timestamps = FALSE; | |
2019 | -- columns; | |
2020 | } | |
2021 | ||
2022 | if (DWARF2_FILE_SIZE_NAME ("", "") == -1) | |
2023 | { | |
2024 | emit_filesize = FALSE; | |
2025 | -- columns; | |
2026 | } | |
2027 | ||
2028 | for (i = 0; i < files_in_use; ++i) | |
2029 | if (files[i].md5[0] != 0) | |
2030 | break; | |
2031 | if (i < files_in_use) | |
2032 | { | |
2033 | emit_md5 = TRUE; | |
2034 | ++ columns; | |
2035 | } | |
2036 | ||
2037 | /* The number of format entries to follow. */ | |
2038 | out_byte (columns); | |
2039 | ||
2040 | /* The format of the file name. */ | |
2041 | out_uleb128 (DW_LNCT_path); | |
2042 | /* FIXME: it would be better to store these strings in | |
2043 | the .debug_line_str section and reference them here. */ | |
2044 | out_uleb128 (DW_FORM_string); | |
2045 | ||
2046 | /* The format of the directory index. */ | |
2047 | out_uleb128 (DW_LNCT_directory_index); | |
2048 | out_uleb128 (DW_FORM_udata); | |
2049 | ||
2050 | if (emit_timestamps) | |
2051 | { | |
2052 | /* The format of the timestamp. */ | |
2053 | out_uleb128 (DW_LNCT_timestamp); | |
2054 | out_uleb128 (DW_FORM_udata); | |
2055 | } | |
2056 | ||
2057 | if (emit_filesize) | |
2058 | { | |
2059 | /* The format of the file size. */ | |
2060 | out_uleb128 (DW_LNCT_size); | |
2061 | out_uleb128 (DW_FORM_udata); | |
2062 | } | |
2063 | ||
2064 | if (emit_md5) | |
2065 | { | |
2066 | /* The format of the MD5 sum. */ | |
2067 | out_uleb128 (DW_LNCT_MD5); | |
2068 | out_uleb128 (DW_FORM_data16); | |
2069 | } | |
2070 | ||
2071 | /* The number of entries in the table. */ | |
2072 | out_uleb128 (files_in_use); | |
2073 | } | |
2074 | ||
2075 | for (i = DWARF2_LINE_VERSION > 4 ? 0 : 1; i < files_in_use; ++i) | |
fac0d250 | 2076 | { |
01e1a5bc NC |
2077 | const char *fullfilename; |
2078 | ||
249e3833 RH |
2079 | if (files[i].filename == NULL) |
2080 | { | |
88b4ca40 RH |
2081 | /* Prevent a crash later, particularly for file 1. */ |
2082 | files[i].filename = ""; | |
5496f3c6 NC |
2083 | if (DWARF2_LINE_VERSION < 5 || i != 0) |
2084 | { | |
2085 | as_bad (_("unassigned file number %ld"), (long) i); | |
2086 | continue; | |
2087 | } | |
249e3833 RH |
2088 | } |
2089 | ||
01e1a5bc NC |
2090 | fullfilename = DWARF2_FILE_NAME (files[i].filename, |
2091 | files[i].dir ? dirs [files [i].dir] : ""); | |
2092 | size = strlen (fullfilename) + 1; | |
fac0d250 | 2093 | cp = frag_more (size); |
01e1a5bc | 2094 | memcpy (cp, fullfilename, size); |
fac0d250 | 2095 | |
5496f3c6 NC |
2096 | /* Directory number. */ |
2097 | out_uleb128 (files[i].dir); | |
2098 | ||
01e1a5bc | 2099 | /* Output the last modification timestamp. */ |
5496f3c6 NC |
2100 | if (emit_timestamps) |
2101 | { | |
2102 | offsetT timestamp; | |
2103 | ||
2104 | timestamp = DWARF2_FILE_TIME_NAME (files[i].filename, | |
2105 | files[i].dir ? dirs [files [i].dir] : ""); | |
2106 | if (timestamp == -1) | |
2107 | timestamp = 0; | |
2108 | out_uleb128 (timestamp); | |
2109 | } | |
2110 | ||
01e1a5bc | 2111 | /* Output the filesize. */ |
5496f3c6 NC |
2112 | if (emit_filesize) |
2113 | { | |
2114 | offsetT filesize; | |
2115 | filesize = DWARF2_FILE_SIZE_NAME (files[i].filename, | |
2116 | files[i].dir ? dirs [files [i].dir] : ""); | |
2117 | if (filesize == -1) | |
2118 | filesize = 0; | |
2119 | out_uleb128 (filesize); | |
2120 | } | |
2121 | ||
2122 | /* Output the md5 sum. */ | |
2123 | if (emit_md5) | |
2124 | { | |
2125 | int b; | |
2126 | ||
2127 | for (b = 0; b < NUM_MD5_BYTES; b++) | |
2128 | out_byte (files[i].md5[b]); | |
2129 | } | |
fac0d250 | 2130 | } |
353e2c69 | 2131 | |
5496f3c6 NC |
2132 | if (DWARF2_LINE_VERSION < 5) |
2133 | /* Terminate filename list. */ | |
2134 | out_byte (0); | |
fac0d250 RH |
2135 | } |
2136 | ||
413a266c AM |
2137 | /* Switch to SEC and output a header length field. Return the size of |
2138 | offsets used in SEC. The caller must set EXPR->X_add_symbol value | |
d025d5e5 MW |
2139 | to the end of the section. EXPR->X_add_number will be set to the |
2140 | negative size of the header. */ | |
413a266c AM |
2141 | |
2142 | static int | |
91d6fa6a | 2143 | out_header (asection *sec, expressionS *exp) |
413a266c AM |
2144 | { |
2145 | symbolS *start_sym; | |
2146 | symbolS *end_sym; | |
2147 | ||
2148 | subseg_set (sec, 0); | |
b57dc16f | 2149 | |
0f8f0c57 NC |
2150 | if (flag_dwarf_sections) |
2151 | { | |
2152 | /* If we are going to put the start and end symbols in different | |
2153 | sections, then we need real symbols, not just fake, local ones. */ | |
2154 | frag_now_fix (); | |
2155 | start_sym = symbol_make (".Ldebug_line_start"); | |
2156 | end_sym = symbol_make (".Ldebug_line_end"); | |
2157 | symbol_set_value_now (start_sym); | |
2158 | } | |
2159 | else | |
0f8f0c57 | 2160 | { |
72354279 | 2161 | start_sym = symbol_temp_new_now_octets (); |
0f8f0c57 NC |
2162 | end_sym = symbol_temp_make (); |
2163 | } | |
413a266c AM |
2164 | |
2165 | /* Total length of the information. */ | |
91d6fa6a NC |
2166 | exp->X_op = O_subtract; |
2167 | exp->X_add_symbol = end_sym; | |
2168 | exp->X_op_symbol = start_sym; | |
413a266c AM |
2169 | |
2170 | switch (DWARF2_FORMAT (sec)) | |
2171 | { | |
2172 | case dwarf2_format_32bit: | |
91d6fa6a NC |
2173 | exp->X_add_number = -4; |
2174 | emit_expr (exp, 4); | |
413a266c AM |
2175 | return 4; |
2176 | ||
2177 | case dwarf2_format_64bit: | |
91d6fa6a | 2178 | exp->X_add_number = -12; |
413a266c | 2179 | out_four (-1); |
91d6fa6a | 2180 | emit_expr (exp, 8); |
413a266c AM |
2181 | return 8; |
2182 | ||
2183 | case dwarf2_format_64bit_irix: | |
91d6fa6a NC |
2184 | exp->X_add_number = -8; |
2185 | emit_expr (exp, 8); | |
413a266c AM |
2186 | return 8; |
2187 | } | |
2188 | ||
2189 | as_fatal (_("internal error: unknown dwarf2 format")); | |
2190 | return 0; | |
2191 | } | |
2192 | ||
220e750f RH |
2193 | /* Emit the collected .debug_line data. */ |
2194 | ||
2195 | static void | |
a2e22468 | 2196 | out_debug_line (segT line_seg) |
220e750f | 2197 | { |
91d6fa6a | 2198 | expressionS exp; |
02fe846e | 2199 | symbolS *prologue_start, *prologue_end; |
220e750f RH |
2200 | symbolS *line_end; |
2201 | struct line_seg *s; | |
14e777e0 | 2202 | int sizeof_offset; |
220e750f | 2203 | |
031e3350 | 2204 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2205 | sizeof_offset = out_header (line_seg, &exp); |
2206 | line_end = exp.X_add_symbol; | |
220e750f RH |
2207 | |
2208 | /* Version. */ | |
88ebb0a1 | 2209 | out_two (DWARF2_LINE_VERSION); |
220e750f | 2210 | |
5496f3c6 NC |
2211 | if (DWARF2_LINE_VERSION >= 5) |
2212 | { | |
2213 | out_byte (sizeof_address); | |
2214 | out_byte (0); /* Segment Selector size. */ | |
2215 | } | |
220e750f | 2216 | /* Length of the prologue following this length. */ |
02fe846e | 2217 | prologue_start = symbol_temp_make (); |
413a266c | 2218 | prologue_end = symbol_temp_make (); |
02fe846e | 2219 | exp.X_op = O_subtract; |
91d6fa6a | 2220 | exp.X_add_symbol = prologue_end; |
02fe846e AM |
2221 | exp.X_op_symbol = prologue_start; |
2222 | exp.X_add_number = 0; | |
91d6fa6a | 2223 | emit_expr (&exp, sizeof_offset); |
e2b9a97e | 2224 | symbol_set_value_now (prologue_start); |
220e750f RH |
2225 | |
2226 | /* Parameters of the state machine. */ | |
2227 | out_byte (DWARF2_LINE_MIN_INSN_LENGTH); | |
5496f3c6 NC |
2228 | if (DWARF2_LINE_VERSION >= 4) |
2229 | out_byte (DWARF2_LINE_MAX_OPS_PER_INSN); | |
220e750f RH |
2230 | out_byte (DWARF2_LINE_DEFAULT_IS_STMT); |
2231 | out_byte (DWARF2_LINE_BASE); | |
2232 | out_byte (DWARF2_LINE_RANGE); | |
2233 | out_byte (DWARF2_LINE_OPCODE_BASE); | |
2234 | ||
2235 | /* Standard opcode lengths. */ | |
2236 | out_byte (0); /* DW_LNS_copy */ | |
2237 | out_byte (1); /* DW_LNS_advance_pc */ | |
2238 | out_byte (1); /* DW_LNS_advance_line */ | |
2239 | out_byte (1); /* DW_LNS_set_file */ | |
2240 | out_byte (1); /* DW_LNS_set_column */ | |
2241 | out_byte (0); /* DW_LNS_negate_stmt */ | |
2242 | out_byte (0); /* DW_LNS_set_basic_block */ | |
2243 | out_byte (0); /* DW_LNS_const_add_pc */ | |
2244 | out_byte (1); /* DW_LNS_fixed_advance_pc */ | |
bd0eb99b RH |
2245 | out_byte (0); /* DW_LNS_set_prologue_end */ |
2246 | out_byte (0); /* DW_LNS_set_epilogue_begin */ | |
2247 | out_byte (1); /* DW_LNS_set_isa */ | |
5496f3c6 NC |
2248 | /* We have emitted 12 opcode lengths, so make that this |
2249 | matches up to the opcode base value we have been using. */ | |
2250 | gas_assert (DWARF2_LINE_OPCODE_BASE == 13); | |
220e750f | 2251 | |
5496f3c6 | 2252 | out_dir_and_file_list (); |
220e750f | 2253 | |
e2b9a97e | 2254 | symbol_set_value_now (prologue_end); |
220e750f RH |
2255 | |
2256 | /* For each section, emit a statement program. */ | |
ee515fb7 | 2257 | for (s = all_segs; s; s = s->next) |
9aec2026 NC |
2258 | if (SEG_NORMAL (s->seg)) |
2259 | process_entries (s->seg, s->head->head); | |
2260 | else | |
2261 | as_warn ("dwarf line number information for %s ignored", | |
2262 | segment_name (s->seg)); | |
220e750f | 2263 | |
b40bf0a2 NC |
2264 | if (flag_dwarf_sections) |
2265 | /* We have to switch to the special .debug_line_end section | |
2266 | before emitting the end-of-debug_line symbol. The linker | |
2267 | script arranges for this section to be placed after all the | |
2268 | (potentially garbage collected) .debug_line.<foo> sections. | |
2269 | This section contains the line_end symbol which is used to | |
2270 | compute the size of the linked .debug_line section, as seen | |
2271 | in the DWARF Line Number header. */ | |
2272 | subseg_set (subseg_get (".debug_line_end", FALSE), 0); | |
2273 | ||
e2b9a97e | 2274 | symbol_set_value_now (line_end); |
220e750f RH |
2275 | } |
2276 | ||
802f5d9e NC |
2277 | static void |
2278 | out_debug_ranges (segT ranges_seg) | |
2279 | { | |
2280 | unsigned int addr_size = sizeof_address; | |
2281 | struct line_seg *s; | |
91d6fa6a | 2282 | expressionS exp; |
802f5d9e NC |
2283 | unsigned int i; |
2284 | ||
031e3350 | 2285 | memset (&exp, 0, sizeof exp); |
802f5d9e NC |
2286 | subseg_set (ranges_seg, 0); |
2287 | ||
2288 | /* Base Address Entry. */ | |
7fd3924a | 2289 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2290 | out_byte (0xff); |
7fd3924a | 2291 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2292 | out_byte (0); |
2293 | ||
2294 | /* Range List Entry. */ | |
2295 | for (s = all_segs; s; s = s->next) | |
2296 | { | |
2297 | fragS *frag; | |
2298 | symbolS *beg, *end; | |
2299 | ||
2300 | frag = first_frag_for_seg (s->seg); | |
2301 | beg = symbol_temp_new (s->seg, 0, frag); | |
2302 | s->text_start = beg; | |
2303 | ||
2304 | frag = last_frag_for_seg (s->seg); | |
2305 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); | |
2306 | s->text_end = end; | |
2307 | ||
91d6fa6a NC |
2308 | exp.X_op = O_symbol; |
2309 | exp.X_add_symbol = beg; | |
2310 | exp.X_add_number = 0; | |
2311 | emit_expr (&exp, addr_size); | |
802f5d9e | 2312 | |
91d6fa6a NC |
2313 | exp.X_op = O_symbol; |
2314 | exp.X_add_symbol = end; | |
2315 | exp.X_add_number = 0; | |
2316 | emit_expr (&exp, addr_size); | |
802f5d9e NC |
2317 | } |
2318 | ||
2319 | /* End of Range Entry. */ | |
7fd3924a | 2320 | for (i = 0; i < addr_size; i++) |
802f5d9e | 2321 | out_byte (0); |
7fd3924a | 2322 | for (i = 0; i < addr_size; i++) |
802f5d9e NC |
2323 | out_byte (0); |
2324 | } | |
2325 | ||
220e750f RH |
2326 | /* Emit data for .debug_aranges. */ |
2327 | ||
58b5739a | 2328 | static void |
a2e22468 | 2329 | out_debug_aranges (segT aranges_seg, segT info_seg) |
fac0d250 | 2330 | { |
220e750f | 2331 | unsigned int addr_size = sizeof_address; |
d025d5e5 | 2332 | offsetT size; |
220e750f | 2333 | struct line_seg *s; |
91d6fa6a | 2334 | expressionS exp; |
413a266c | 2335 | symbolS *aranges_end; |
220e750f | 2336 | char *p; |
413a266c | 2337 | int sizeof_offset; |
fac0d250 | 2338 | |
031e3350 | 2339 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2340 | sizeof_offset = out_header (aranges_seg, &exp); |
2341 | aranges_end = exp.X_add_symbol; | |
d025d5e5 | 2342 | size = -exp.X_add_number; |
fac0d250 | 2343 | |
220e750f | 2344 | /* Version. */ |
88ebb0a1 | 2345 | out_two (DWARF2_ARANGES_VERSION); |
d025d5e5 | 2346 | size += 2; |
4dc7ead9 | 2347 | |
220e750f | 2348 | /* Offset to .debug_info. */ |
413a266c | 2349 | TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset); |
d025d5e5 | 2350 | size += sizeof_offset; |
220e750f RH |
2351 | |
2352 | /* Size of an address (offset portion). */ | |
2353 | out_byte (addr_size); | |
d025d5e5 | 2354 | size++; |
220e750f RH |
2355 | |
2356 | /* Size of a segment descriptor. */ | |
2357 | out_byte (0); | |
d025d5e5 | 2358 | size++; |
220e750f RH |
2359 | |
2360 | /* Align the header. */ | |
d025d5e5 MW |
2361 | while ((size++ % (2 * addr_size)) > 0) |
2362 | out_byte (0); | |
4dc7ead9 | 2363 | |
ee515fb7 | 2364 | for (s = all_segs; s; s = s->next) |
220e750f RH |
2365 | { |
2366 | fragS *frag; | |
2367 | symbolS *beg, *end; | |
2368 | ||
2369 | frag = first_frag_for_seg (s->seg); | |
b7d6ed97 | 2370 | beg = symbol_temp_new (s->seg, 0, frag); |
220e750f RH |
2371 | s->text_start = beg; |
2372 | ||
2373 | frag = last_frag_for_seg (s->seg); | |
c9049d30 | 2374 | end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag); |
220e750f RH |
2375 | s->text_end = end; |
2376 | ||
91d6fa6a NC |
2377 | exp.X_op = O_symbol; |
2378 | exp.X_add_symbol = beg; | |
2379 | exp.X_add_number = 0; | |
2380 | emit_expr (&exp, addr_size); | |
220e750f | 2381 | |
91d6fa6a NC |
2382 | exp.X_op = O_subtract; |
2383 | exp.X_add_symbol = end; | |
2384 | exp.X_op_symbol = beg; | |
2385 | exp.X_add_number = 0; | |
2386 | emit_expr (&exp, addr_size); | |
220e750f | 2387 | } |
4dc7ead9 | 2388 | |
220e750f RH |
2389 | p = frag_more (2 * addr_size); |
2390 | md_number_to_chars (p, 0, addr_size); | |
2391 | md_number_to_chars (p + addr_size, 0, addr_size); | |
413a266c | 2392 | |
e2b9a97e | 2393 | symbol_set_value_now (aranges_end); |
4dc7ead9 RH |
2394 | } |
2395 | ||
220e750f RH |
2396 | /* Emit data for .debug_abbrev. Note that this must be kept in |
2397 | sync with out_debug_info below. */ | |
fac0d250 | 2398 | |
220e750f | 2399 | static void |
413a266c AM |
2400 | out_debug_abbrev (segT abbrev_seg, |
2401 | segT info_seg ATTRIBUTE_UNUSED, | |
2402 | segT line_seg ATTRIBUTE_UNUSED) | |
220e750f RH |
2403 | { |
2404 | subseg_set (abbrev_seg, 0); | |
fac0d250 | 2405 | |
220e750f RH |
2406 | out_uleb128 (1); |
2407 | out_uleb128 (DW_TAG_compile_unit); | |
2408 | out_byte (DW_CHILDREN_no); | |
413a266c AM |
2409 | if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit) |
2410 | out_abbrev (DW_AT_stmt_list, DW_FORM_data4); | |
2411 | else | |
2412 | out_abbrev (DW_AT_stmt_list, DW_FORM_data8); | |
220e750f | 2413 | if (all_segs->next == NULL) |
4dc7ead9 | 2414 | { |
220e750f | 2415 | out_abbrev (DW_AT_low_pc, DW_FORM_addr); |
88ebb0a1 MW |
2416 | if (DWARF2_VERSION < 4) |
2417 | out_abbrev (DW_AT_high_pc, DW_FORM_addr); | |
2418 | else | |
2419 | out_abbrev (DW_AT_high_pc, (sizeof_address == 4 | |
2420 | ? DW_FORM_data4 : DW_FORM_data8)); | |
220e750f | 2421 | } |
802f5d9e NC |
2422 | else |
2423 | { | |
413a266c | 2424 | if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit) |
802f5d9e NC |
2425 | out_abbrev (DW_AT_ranges, DW_FORM_data4); |
2426 | else | |
2427 | out_abbrev (DW_AT_ranges, DW_FORM_data8); | |
2428 | } | |
49fced12 MW |
2429 | out_abbrev (DW_AT_name, DW_FORM_strp); |
2430 | out_abbrev (DW_AT_comp_dir, DW_FORM_strp); | |
2431 | out_abbrev (DW_AT_producer, DW_FORM_strp); | |
220e750f RH |
2432 | out_abbrev (DW_AT_language, DW_FORM_data2); |
2433 | out_abbrev (0, 0); | |
a987bfc9 RH |
2434 | |
2435 | /* Terminate the abbreviations for this compilation unit. */ | |
2436 | out_byte (0); | |
220e750f | 2437 | } |
4dc7ead9 | 2438 | |
220e750f | 2439 | /* Emit a description of this compilation unit for .debug_info. */ |
4dc7ead9 | 2440 | |
220e750f | 2441 | static void |
49fced12 MW |
2442 | out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg, |
2443 | symbolS *name_sym, symbolS *comp_dir_sym, symbolS *producer_sym) | |
220e750f | 2444 | { |
91d6fa6a | 2445 | expressionS exp; |
220e750f | 2446 | symbolS *info_end; |
14e777e0 | 2447 | int sizeof_offset; |
4dc7ead9 | 2448 | |
031e3350 | 2449 | memset (&exp, 0, sizeof exp); |
91d6fa6a NC |
2450 | sizeof_offset = out_header (info_seg, &exp); |
2451 | info_end = exp.X_add_symbol; | |
4dc7ead9 | 2452 | |
220e750f | 2453 | /* DWARF version. */ |
fc0eebac | 2454 | out_two (DWARF2_VERSION); |
4dc7ead9 | 2455 | |
220e750f | 2456 | /* .debug_abbrev offset */ |
6174d9c8 | 2457 | TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset); |
4dc7ead9 | 2458 | |
220e750f RH |
2459 | /* Target address size. */ |
2460 | out_byte (sizeof_address); | |
fac0d250 | 2461 | |
220e750f RH |
2462 | /* DW_TAG_compile_unit DIE abbrev */ |
2463 | out_uleb128 (1); | |
fac0d250 | 2464 | |
220e750f | 2465 | /* DW_AT_stmt_list */ |
413a266c AM |
2466 | TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), |
2467 | (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit | |
2468 | ? 4 : 8)); | |
fac0d250 | 2469 | |
802f5d9e | 2470 | /* These two attributes are emitted if all of the code is contiguous. */ |
220e750f | 2471 | if (all_segs->next == NULL) |
58b5739a | 2472 | { |
220e750f | 2473 | /* DW_AT_low_pc */ |
91d6fa6a NC |
2474 | exp.X_op = O_symbol; |
2475 | exp.X_add_symbol = all_segs->text_start; | |
2476 | exp.X_add_number = 0; | |
2477 | emit_expr (&exp, sizeof_address); | |
220e750f RH |
2478 | |
2479 | /* DW_AT_high_pc */ | |
88ebb0a1 MW |
2480 | if (DWARF2_VERSION < 4) |
2481 | exp.X_op = O_symbol; | |
2482 | else | |
2483 | { | |
2484 | exp.X_op = O_subtract; | |
2485 | exp.X_op_symbol = all_segs->text_start; | |
2486 | } | |
91d6fa6a NC |
2487 | exp.X_add_symbol = all_segs->text_end; |
2488 | exp.X_add_number = 0; | |
2489 | emit_expr (&exp, sizeof_address); | |
58b5739a | 2490 | } |
802f5d9e NC |
2491 | else |
2492 | { | |
eb1fe072 NC |
2493 | /* This attribute is emitted if the code is disjoint. */ |
2494 | /* DW_AT_ranges. */ | |
2495 | TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset); | |
802f5d9e | 2496 | } |
58b5739a | 2497 | |
49fced12 MW |
2498 | /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str |
2499 | setup in out_debug_str below. */ | |
2500 | TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset); | |
2501 | TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset); | |
2502 | TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset); | |
2503 | ||
2504 | /* DW_AT_language. Yes, this is probably not really MIPS, but the | |
2505 | dwarf2 draft has no standard code for assembler. */ | |
2506 | out_two (DW_LANG_Mips_Assembler); | |
2507 | ||
e2b9a97e | 2508 | symbol_set_value_now (info_end); |
49fced12 MW |
2509 | } |
2510 | ||
2511 | /* Emit the three debug strings needed in .debug_str and setup symbols | |
2512 | to them for use in out_debug_info. */ | |
2513 | static void | |
2514 | out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym, | |
2515 | symbolS **producer_sym) | |
2516 | { | |
2517 | char producer[128]; | |
2518 | const char *comp_dir; | |
2519 | const char *dirname; | |
2520 | char *p; | |
2521 | int len; | |
5496f3c6 | 2522 | int first_file = DWARF2_LINE_VERSION > 4 ? 0 : 1; |
49fced12 MW |
2523 | |
2524 | subseg_set (str_seg, 0); | |
2525 | ||
48b91938 | 2526 | /* DW_AT_name. We don't have the actual file name that was present |
5496f3c6 | 2527 | on the command line, so assume files[first_file] is the main input file. |
48b91938 RH |
2528 | We're not supposed to get called unless at least one line number |
2529 | entry was emitted, so this should always be defined. */ | |
5c4e5fe6 | 2530 | *name_sym = symbol_temp_new_now_octets (); |
7fd3924a | 2531 | if (files_in_use == 0) |
48b91938 | 2532 | abort (); |
5496f3c6 | 2533 | if (files[first_file].dir) |
a7ed1ca2 | 2534 | { |
5496f3c6 | 2535 | dirname = remap_debug_filename (dirs[files[first_file].dir]); |
3d6b762c | 2536 | len = strlen (dirname); |
198f1251 TG |
2537 | #ifdef TE_VMS |
2538 | /* Already has trailing slash. */ | |
2539 | p = frag_more (len); | |
2540 | memcpy (p, dirname, len); | |
2541 | #else | |
a7ed1ca2 | 2542 | p = frag_more (len + 1); |
3d6b762c | 2543 | memcpy (p, dirname, len); |
56487c55 | 2544 | INSERT_DIR_SEPARATOR (p, len); |
198f1251 | 2545 | #endif |
a7ed1ca2 | 2546 | } |
5496f3c6 | 2547 | len = strlen (files[first_file].filename) + 1; |
48b91938 | 2548 | p = frag_more (len); |
5496f3c6 | 2549 | memcpy (p, files[first_file].filename, len); |
48b91938 | 2550 | |
220e750f | 2551 | /* DW_AT_comp_dir */ |
5c4e5fe6 | 2552 | *comp_dir_sym = symbol_temp_new_now_octets (); |
3d6b762c | 2553 | comp_dir = remap_debug_filename (getpwd ()); |
220e750f RH |
2554 | len = strlen (comp_dir) + 1; |
2555 | p = frag_more (len); | |
2556 | memcpy (p, comp_dir, len); | |
fac0d250 | 2557 | |
220e750f | 2558 | /* DW_AT_producer */ |
5c4e5fe6 | 2559 | *producer_sym = symbol_temp_new_now_octets (); |
220e750f RH |
2560 | sprintf (producer, "GNU AS %s", VERSION); |
2561 | len = strlen (producer) + 1; | |
2562 | p = frag_more (len); | |
2563 | memcpy (p, producer, len); | |
fac0d250 RH |
2564 | } |
2565 | ||
1e9cc1c2 NC |
2566 | void |
2567 | dwarf2_init (void) | |
2568 | { | |
1e9cc1c2 | 2569 | last_seg_ptr = &all_segs; |
0ac2b354 AB |
2570 | |
2571 | /* Select the default CIE version to produce here. The global | |
2572 | starts with a value of -1 and will be modified to a valid value | |
2573 | either by the user providing a command line option, or some | |
2574 | targets will select their own default in md_after_parse_args. If | |
2575 | we get here and the global still contains -1 then it is up to us | |
2576 | to pick a sane default. The default we choose is 1, this is the | |
2577 | CIE version gas has produced for a long time, and there seems no | |
2578 | reason to change it yet. */ | |
2579 | if (flag_dwarf_cie_version == -1) | |
2580 | flag_dwarf_cie_version = 1; | |
1e9cc1c2 NC |
2581 | } |
2582 | ||
2583 | ||
c6cb92c5 NS |
2584 | /* Finish the dwarf2 debug sections. We emit .debug.line if there |
2585 | were any .file/.loc directives, or --gdwarf2 was given, or if the | |
df1c40a7 L |
2586 | file has a non-empty .debug_info section and an empty .debug_line |
2587 | section. If we emit .debug_line, and the .debug_info section is | |
2588 | empty, we also emit .debug_info, .debug_aranges and .debug_abbrev. | |
2589 | ALL_SEGS will be non-null if there were any .file/.loc directives, | |
2590 | or --gdwarf2 was given and there were any located instructions | |
2591 | emitted. */ | |
c6cb92c5 | 2592 | |
fac0d250 | 2593 | void |
a2e22468 | 2594 | dwarf2_finish (void) |
fac0d250 | 2595 | { |
220e750f RH |
2596 | segT line_seg; |
2597 | struct line_seg *s; | |
c6cb92c5 NS |
2598 | segT info_seg; |
2599 | int emit_other_sections = 0; | |
df1c40a7 | 2600 | int empty_debug_line = 0; |
c6cb92c5 NS |
2601 | |
2602 | info_seg = bfd_get_section_by_name (stdoutput, ".debug_info"); | |
2603 | emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg); | |
fac0d250 | 2604 | |
df1c40a7 L |
2605 | line_seg = bfd_get_section_by_name (stdoutput, ".debug_line"); |
2606 | empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg); | |
2607 | ||
2608 | /* We can't construct a new debug_line section if we already have one. | |
2609 | Give an error. */ | |
2610 | if (all_segs && !empty_debug_line) | |
2611 | as_fatal ("duplicate .debug_line sections"); | |
2612 | ||
2613 | if ((!all_segs && emit_other_sections) | |
2614 | || (!emit_other_sections && !empty_debug_line)) | |
2615 | /* If there is no line information and no non-empty .debug_info | |
2616 | section, or if there is both a non-empty .debug_info and a non-empty | |
2617 | .debug_line, then we do nothing. */ | |
220e750f | 2618 | return; |
fac0d250 | 2619 | |
220e750f | 2620 | /* Calculate the size of an address for the target machine. */ |
9605f328 | 2621 | sizeof_address = DWARF2_ADDR_SIZE (stdoutput); |
fac0d250 | 2622 | |
220e750f RH |
2623 | /* Create and switch to the line number section. */ |
2624 | line_seg = subseg_new (".debug_line", 0); | |
61826503 | 2625 | bfd_set_section_flags (line_seg, SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); |
fac0d250 | 2626 | |
220e750f | 2627 | /* For each subsection, chain the debug entries together. */ |
ee515fb7 | 2628 | for (s = all_segs; s; s = s->next) |
fac0d250 | 2629 | { |
91d6fa6a NC |
2630 | struct line_subseg *lss = s->head; |
2631 | struct line_entry **ptail = lss->ptail; | |
220e750f | 2632 | |
62e6b7b3 AO |
2633 | /* Reset the initial view of the first subsection of the |
2634 | section. */ | |
2635 | if (lss->head && lss->head->loc.view) | |
2636 | set_or_check_view (lss->head, NULL, NULL); | |
2637 | ||
91d6fa6a | 2638 | while ((lss = lss->next) != NULL) |
220e750f | 2639 | { |
62e6b7b3 AO |
2640 | /* Link the first view of subsequent subsections to the |
2641 | previous view. */ | |
2642 | if (lss->head && lss->head->loc.view) | |
2643 | set_or_check_view (lss->head, | |
2644 | !s->head ? NULL : (struct line_entry *)ptail, | |
2645 | s->head ? s->head->head : NULL); | |
91d6fa6a NC |
2646 | *ptail = lss->head; |
2647 | ptail = lss->ptail; | |
220e750f | 2648 | } |
fac0d250 | 2649 | } |
85a39694 | 2650 | |
220e750f | 2651 | out_debug_line (line_seg); |
85a39694 | 2652 | |
c6cb92c5 | 2653 | /* If this is assembler generated line info, and there is no |
49fced12 MW |
2654 | debug_info already, we need .debug_info, .debug_abbrev and |
2655 | .debug_str sections as well. */ | |
c6cb92c5 | 2656 | if (emit_other_sections) |
220e750f RH |
2657 | { |
2658 | segT abbrev_seg; | |
220e750f | 2659 | segT aranges_seg; |
802f5d9e | 2660 | segT ranges_seg; |
49fced12 MW |
2661 | segT str_seg; |
2662 | symbolS *name_sym, *comp_dir_sym, *producer_sym; | |
4dc7ead9 | 2663 | |
9c2799c2 | 2664 | gas_assert (all_segs); |
7fd3924a | 2665 | |
220e750f RH |
2666 | info_seg = subseg_new (".debug_info", 0); |
2667 | abbrev_seg = subseg_new (".debug_abbrev", 0); | |
2668 | aranges_seg = subseg_new (".debug_aranges", 0); | |
49fced12 | 2669 | str_seg = subseg_new (".debug_str", 0); |
ef99799a | 2670 | |
61826503 CE |
2671 | bfd_set_section_flags (info_seg, |
2672 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2673 | bfd_set_section_flags (abbrev_seg, | |
2674 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2675 | bfd_set_section_flags (aranges_seg, | |
2676 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
2677 | bfd_set_section_flags (str_seg, | |
2678 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS | |
2679 | | SEC_MERGE | SEC_STRINGS); | |
49fced12 | 2680 | str_seg->entsize = 1; |
ef99799a | 2681 | |
ee515fb7 | 2682 | record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1); |
ef99799a | 2683 | |
802f5d9e NC |
2684 | if (all_segs->next == NULL) |
2685 | ranges_seg = NULL; | |
2686 | else | |
2687 | { | |
2688 | ranges_seg = subseg_new (".debug_ranges", 0); | |
61826503 CE |
2689 | bfd_set_section_flags (ranges_seg, |
2690 | SEC_READONLY | SEC_DEBUGGING | SEC_OCTETS); | |
802f5d9e NC |
2691 | record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1); |
2692 | out_debug_ranges (ranges_seg); | |
2693 | } | |
2694 | ||
220e750f | 2695 | out_debug_aranges (aranges_seg, info_seg); |
413a266c | 2696 | out_debug_abbrev (abbrev_seg, info_seg, line_seg); |
49fced12 MW |
2697 | out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym); |
2698 | out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg, | |
2699 | name_sym, comp_dir_sym, producer_sym); | |
220e750f | 2700 | } |
85a39694 | 2701 | } |
ba8826a8 AO |
2702 | |
2703 | /* Perform any deferred checks pertaining to debug information. */ | |
2704 | ||
2705 | void | |
2706 | dwarf2dbg_final_check (void) | |
2707 | { | |
2708 | /* Perform reset-view checks. Don't evaluate view_assert_failed | |
2709 | recursively: it could be very deep. It's a chain of adds, with | |
2710 | each chain element pointing to the next in X_add_symbol, and | |
2711 | holding the check value in X_op_symbol. */ | |
2712 | while (view_assert_failed) | |
2713 | { | |
723dfee7 | 2714 | expressionS *exp; |
ba8826a8 AO |
2715 | symbolS *sym; |
2716 | offsetT failed; | |
2717 | ||
2718 | gas_assert (!symbol_resolved_p (view_assert_failed)); | |
2719 | ||
723dfee7 | 2720 | exp = symbol_get_value_expression (view_assert_failed); |
ba8826a8 AO |
2721 | sym = view_assert_failed; |
2722 | ||
2723 | /* If view_assert_failed looks like a compound check in the | |
2724 | chain, break it up. */ | |
723dfee7 | 2725 | if (exp->X_op == O_add && exp->X_add_number == 0 && exp->X_unsigned) |
ba8826a8 | 2726 | { |
723dfee7 HPN |
2727 | view_assert_failed = exp->X_add_symbol; |
2728 | sym = exp->X_op_symbol; | |
ba8826a8 AO |
2729 | } |
2730 | else | |
2731 | view_assert_failed = NULL; | |
2732 | ||
2733 | failed = resolve_symbol_value (sym); | |
2734 | if (!symbol_resolved_p (sym) || failed) | |
2735 | { | |
2736 | as_bad (_("view number mismatch")); | |
2737 | break; | |
2738 | } | |
2739 | } | |
2740 | } |