Commit | Line | Data |
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6d8a639a | 1 | // SPDX-License-Identifier: GPL-2.0-only |
598b7c69 SE |
2 | /* |
3 | * genelf_debug.c | |
4 | * Copyright (C) 2015, Google, Inc | |
5 | * | |
6 | * Contributed by: | |
7 | * Stephane Eranian <eranian@google.com> | |
8 | * | |
598b7c69 SE |
9 | * based on GPLv2 source code from Oprofile |
10 | * @remark Copyright 2007 OProfile authors | |
11 | * @author Philippe Elie | |
12 | */ | |
c9f5da74 | 13 | #include <linux/compiler.h> |
e413f9f1 | 14 | #include <linux/zalloc.h> |
598b7c69 SE |
15 | #include <sys/types.h> |
16 | #include <stdio.h> | |
17 | #include <getopt.h> | |
18 | #include <stddef.h> | |
19 | #include <libelf.h> | |
20 | #include <string.h> | |
21 | #include <stdlib.h> | |
22 | #include <inttypes.h> | |
23 | #include <limits.h> | |
24 | #include <fcntl.h> | |
25 | #include <err.h> | |
26 | #include <dwarf.h> | |
27 | ||
598b7c69 SE |
28 | #include "genelf.h" |
29 | #include "../util/jitdump.h" | |
30 | ||
31 | #define BUFFER_EXT_DFL_SIZE (4 * 1024) | |
32 | ||
33 | typedef uint32_t uword; | |
34 | typedef uint16_t uhalf; | |
35 | typedef int32_t sword; | |
36 | typedef int16_t shalf; | |
37 | typedef uint8_t ubyte; | |
38 | typedef int8_t sbyte; | |
39 | ||
40 | struct buffer_ext { | |
41 | size_t cur_pos; | |
42 | size_t max_sz; | |
43 | void *data; | |
44 | }; | |
45 | ||
46 | static void | |
47 | buffer_ext_dump(struct buffer_ext *be, const char *msg) | |
48 | { | |
49 | size_t i; | |
50 | warnx("DUMP for %s", msg); | |
51 | for (i = 0 ; i < be->cur_pos; i++) | |
52 | warnx("%4zu 0x%02x", i, (((char *)be->data)[i]) & 0xff); | |
53 | } | |
54 | ||
55 | static inline int | |
56 | buffer_ext_add(struct buffer_ext *be, void *addr, size_t sz) | |
57 | { | |
58 | void *tmp; | |
59 | size_t be_sz = be->max_sz; | |
60 | ||
61 | retry: | |
62 | if ((be->cur_pos + sz) < be_sz) { | |
63 | memcpy(be->data + be->cur_pos, addr, sz); | |
64 | be->cur_pos += sz; | |
65 | return 0; | |
66 | } | |
67 | ||
68 | if (!be_sz) | |
69 | be_sz = BUFFER_EXT_DFL_SIZE; | |
70 | else | |
71 | be_sz <<= 1; | |
72 | ||
73 | tmp = realloc(be->data, be_sz); | |
74 | if (!tmp) | |
75 | return -1; | |
76 | ||
77 | be->data = tmp; | |
78 | be->max_sz = be_sz; | |
79 | ||
80 | goto retry; | |
81 | } | |
82 | ||
83 | static void | |
84 | buffer_ext_init(struct buffer_ext *be) | |
85 | { | |
86 | be->data = NULL; | |
87 | be->cur_pos = 0; | |
88 | be->max_sz = 0; | |
89 | } | |
90 | ||
dc67c783 IR |
91 | static void |
92 | buffer_ext_exit(struct buffer_ext *be) | |
93 | { | |
e413f9f1 | 94 | zfree(&be->data); |
dc67c783 IR |
95 | } |
96 | ||
598b7c69 SE |
97 | static inline size_t |
98 | buffer_ext_size(struct buffer_ext *be) | |
99 | { | |
100 | return be->cur_pos; | |
101 | } | |
102 | ||
103 | static inline void * | |
104 | buffer_ext_addr(struct buffer_ext *be) | |
105 | { | |
106 | return be->data; | |
107 | } | |
108 | ||
109 | struct debug_line_header { | |
110 | // Not counting this field | |
111 | uword total_length; | |
112 | // version number (2 currently) | |
113 | uhalf version; | |
114 | // relative offset from next field to | |
115 | // program statement | |
116 | uword prolog_length; | |
117 | ubyte minimum_instruction_length; | |
118 | ubyte default_is_stmt; | |
119 | // line_base - see DWARF 2 specs | |
120 | sbyte line_base; | |
121 | // line_range - see DWARF 2 specs | |
122 | ubyte line_range; | |
123 | // number of opcode + 1 | |
124 | ubyte opcode_base; | |
125 | /* follow the array of opcode args nr: ubytes [nr_opcode_base] */ | |
126 | /* follow the search directories index, zero terminated string | |
127 | * terminated by an empty string. | |
128 | */ | |
129 | /* follow an array of { filename, LEB128, LEB128, LEB128 }, first is | |
130 | * the directory index entry, 0 means current directory, then mtime | |
131 | * and filesize, last entry is followed by en empty string. | |
132 | */ | |
133 | /* follow the first program statement */ | |
c9f5da74 | 134 | } __packed; |
598b7c69 SE |
135 | |
136 | /* DWARF 2 spec talk only about one possible compilation unit header while | |
137 | * binutils can handle two flavours of dwarf 2, 32 and 64 bits, this is not | |
138 | * related to the used arch, an ELF 32 can hold more than 4 Go of debug | |
139 | * information. For now we handle only DWARF 2 32 bits comp unit. It'll only | |
140 | * become a problem if we generate more than 4GB of debug information. | |
141 | */ | |
142 | struct compilation_unit_header { | |
143 | uword total_length; | |
144 | uhalf version; | |
145 | uword debug_abbrev_offset; | |
146 | ubyte pointer_size; | |
c9f5da74 | 147 | } __packed; |
598b7c69 SE |
148 | |
149 | #define DW_LNS_num_opcode (DW_LNS_set_isa + 1) | |
150 | ||
151 | /* field filled at run time are marked with -1 */ | |
152 | static struct debug_line_header const default_debug_line_header = { | |
153 | .total_length = -1, | |
154 | .version = 2, | |
155 | .prolog_length = -1, | |
156 | .minimum_instruction_length = 1, /* could be better when min instruction size != 1 */ | |
157 | .default_is_stmt = 1, /* we don't take care about basic block */ | |
158 | .line_base = -5, /* sensible value for line base ... */ | |
159 | .line_range = -14, /* ... and line range are guessed statically */ | |
160 | .opcode_base = DW_LNS_num_opcode | |
161 | }; | |
162 | ||
163 | static ubyte standard_opcode_length[] = | |
164 | { | |
165 | 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 | |
166 | }; | |
167 | #if 0 | |
168 | { | |
169 | [DW_LNS_advance_pc] = 1, | |
170 | [DW_LNS_advance_line] = 1, | |
171 | [DW_LNS_set_file] = 1, | |
172 | [DW_LNS_set_column] = 1, | |
173 | [DW_LNS_fixed_advance_pc] = 1, | |
174 | [DW_LNS_set_isa] = 1, | |
175 | }; | |
176 | #endif | |
177 | ||
178 | /* field filled at run time are marked with -1 */ | |
179 | static struct compilation_unit_header default_comp_unit_header = { | |
180 | .total_length = -1, | |
181 | .version = 2, | |
182 | .debug_abbrev_offset = 0, /* we reuse the same abbrev entries for all comp unit */ | |
183 | .pointer_size = sizeof(void *) | |
184 | }; | |
185 | ||
186 | static void emit_uword(struct buffer_ext *be, uword data) | |
187 | { | |
188 | buffer_ext_add(be, &data, sizeof(uword)); | |
189 | } | |
190 | ||
191 | static void emit_string(struct buffer_ext *be, const char *s) | |
192 | { | |
193 | buffer_ext_add(be, (void *)s, strlen(s) + 1); | |
194 | } | |
195 | ||
196 | static void emit_unsigned_LEB128(struct buffer_ext *be, | |
197 | unsigned long data) | |
198 | { | |
199 | do { | |
200 | ubyte cur = data & 0x7F; | |
201 | data >>= 7; | |
202 | if (data) | |
203 | cur |= 0x80; | |
204 | buffer_ext_add(be, &cur, 1); | |
205 | } while (data); | |
206 | } | |
207 | ||
208 | static void emit_signed_LEB128(struct buffer_ext *be, long data) | |
209 | { | |
210 | int more = 1; | |
211 | int negative = data < 0; | |
212 | int size = sizeof(long) * CHAR_BIT; | |
213 | while (more) { | |
214 | ubyte cur = data & 0x7F; | |
215 | data >>= 7; | |
216 | if (negative) | |
217 | data |= - (1 << (size - 7)); | |
218 | if ((data == 0 && !(cur & 0x40)) || | |
219 | (data == -1l && (cur & 0x40))) | |
220 | more = 0; | |
221 | else | |
222 | cur |= 0x80; | |
223 | buffer_ext_add(be, &cur, 1); | |
224 | } | |
225 | } | |
226 | ||
227 | static void emit_extended_opcode(struct buffer_ext *be, ubyte opcode, | |
228 | void *data, size_t data_len) | |
229 | { | |
230 | buffer_ext_add(be, (char *)"", 1); | |
231 | ||
232 | emit_unsigned_LEB128(be, data_len + 1); | |
233 | ||
234 | buffer_ext_add(be, &opcode, 1); | |
235 | buffer_ext_add(be, data, data_len); | |
236 | } | |
237 | ||
238 | static void emit_opcode(struct buffer_ext *be, ubyte opcode) | |
239 | { | |
240 | buffer_ext_add(be, &opcode, 1); | |
241 | } | |
242 | ||
243 | static void emit_opcode_signed(struct buffer_ext *be, | |
244 | ubyte opcode, long data) | |
245 | { | |
246 | buffer_ext_add(be, &opcode, 1); | |
247 | emit_signed_LEB128(be, data); | |
248 | } | |
249 | ||
250 | static void emit_opcode_unsigned(struct buffer_ext *be, ubyte opcode, | |
251 | unsigned long data) | |
252 | { | |
253 | buffer_ext_add(be, &opcode, 1); | |
254 | emit_unsigned_LEB128(be, data); | |
255 | } | |
256 | ||
257 | static void emit_advance_pc(struct buffer_ext *be, unsigned long delta_pc) | |
258 | { | |
259 | emit_opcode_unsigned(be, DW_LNS_advance_pc, delta_pc); | |
260 | } | |
261 | ||
262 | static void emit_advance_lineno(struct buffer_ext *be, long delta_lineno) | |
263 | { | |
264 | emit_opcode_signed(be, DW_LNS_advance_line, delta_lineno); | |
265 | } | |
266 | ||
267 | static void emit_lne_end_of_sequence(struct buffer_ext *be) | |
268 | { | |
269 | emit_extended_opcode(be, DW_LNE_end_sequence, NULL, 0); | |
270 | } | |
271 | ||
272 | static void emit_set_file(struct buffer_ext *be, unsigned long idx) | |
273 | { | |
274 | emit_opcode_unsigned(be, DW_LNS_set_file, idx); | |
275 | } | |
276 | ||
277 | static void emit_lne_define_filename(struct buffer_ext *be, | |
278 | const char *filename) | |
279 | { | |
280 | buffer_ext_add(be, (void *)"", 1); | |
281 | ||
282 | /* LNE field, strlen(filename) + zero termination, 3 bytes for: the dir entry, timestamp, filesize */ | |
283 | emit_unsigned_LEB128(be, strlen(filename) + 5); | |
284 | emit_opcode(be, DW_LNE_define_file); | |
285 | emit_string(be, filename); | |
286 | /* directory index 0=do not know */ | |
287 | emit_unsigned_LEB128(be, 0); | |
288 | /* last modification date on file 0=do not know */ | |
289 | emit_unsigned_LEB128(be, 0); | |
290 | /* filesize 0=do not know */ | |
291 | emit_unsigned_LEB128(be, 0); | |
292 | } | |
293 | ||
294 | static void emit_lne_set_address(struct buffer_ext *be, | |
295 | void *address) | |
296 | { | |
297 | emit_extended_opcode(be, DW_LNE_set_address, &address, sizeof(unsigned long)); | |
298 | } | |
299 | ||
300 | static ubyte get_special_opcode(struct debug_entry *ent, | |
301 | unsigned int last_line, | |
302 | unsigned long last_vma) | |
303 | { | |
304 | unsigned int temp; | |
305 | unsigned long delta_addr; | |
306 | ||
307 | /* | |
308 | * delta from line_base | |
309 | */ | |
310 | temp = (ent->lineno - last_line) - default_debug_line_header.line_base; | |
311 | ||
312 | if (temp >= default_debug_line_header.line_range) | |
313 | return 0; | |
314 | ||
315 | /* | |
316 | * delta of addresses | |
317 | */ | |
318 | delta_addr = (ent->addr - last_vma) / default_debug_line_header.minimum_instruction_length; | |
319 | ||
320 | /* This is not sufficient to ensure opcode will be in [0-256] but | |
321 | * sufficient to ensure when summing with the delta lineno we will | |
322 | * not overflow the unsigned long opcode */ | |
323 | ||
324 | if (delta_addr <= 256 / default_debug_line_header.line_range) { | |
325 | unsigned long opcode = temp + | |
326 | (delta_addr * default_debug_line_header.line_range) + | |
327 | default_debug_line_header.opcode_base; | |
328 | ||
329 | return opcode <= 255 ? opcode : 0; | |
330 | } | |
331 | return 0; | |
332 | } | |
333 | ||
334 | static void emit_lineno_info(struct buffer_ext *be, | |
335 | struct debug_entry *ent, size_t nr_entry, | |
336 | unsigned long code_addr) | |
337 | { | |
338 | size_t i; | |
339 | ||
362f9c90 | 340 | /* as described in the jitdump format */ |
341 | const char repeated_name_marker[] = {'\xff', '\0'}; | |
342 | ||
598b7c69 SE |
343 | /* |
344 | * Machine state at start of a statement program | |
345 | * address = 0 | |
346 | * file = 1 | |
347 | * line = 1 | |
348 | * column = 0 | |
349 | * is_stmt = default_is_stmt as given in the debug_line_header | |
350 | * basic block = 0 | |
351 | * end sequence = 0 | |
352 | */ | |
353 | ||
354 | /* start state of the state machine we take care of */ | |
1e4bd2ae | 355 | unsigned long last_vma = 0; |
598b7c69 SE |
356 | char const *cur_filename = NULL; |
357 | unsigned long cur_file_idx = 0; | |
358 | int last_line = 1; | |
359 | ||
360 | emit_lne_set_address(be, (void *)code_addr); | |
361 | ||
362 | for (i = 0; i < nr_entry; i++, ent = debug_entry_next(ent)) { | |
363 | int need_copy = 0; | |
364 | ubyte special_opcode; | |
365 | ||
366 | /* | |
367 | * check if filename changed, if so add it | |
368 | */ | |
362f9c90 | 369 | if ((!cur_filename || strcmp(cur_filename, ent->name)) && |
370 | strcmp(repeated_name_marker, ent->name)) { | |
598b7c69 SE |
371 | emit_lne_define_filename(be, ent->name); |
372 | cur_filename = ent->name; | |
373 | emit_set_file(be, ++cur_file_idx); | |
374 | need_copy = 1; | |
375 | } | |
376 | ||
377 | special_opcode = get_special_opcode(ent, last_line, last_vma); | |
378 | if (special_opcode != 0) { | |
379 | last_line = ent->lineno; | |
380 | last_vma = ent->addr; | |
381 | emit_opcode(be, special_opcode); | |
382 | } else { | |
383 | /* | |
384 | * lines differ, emit line delta | |
385 | */ | |
386 | if (last_line != ent->lineno) { | |
387 | emit_advance_lineno(be, ent->lineno - last_line); | |
388 | last_line = ent->lineno; | |
389 | need_copy = 1; | |
390 | } | |
391 | /* | |
392 | * addresses differ, emit address delta | |
393 | */ | |
394 | if (last_vma != ent->addr) { | |
395 | emit_advance_pc(be, ent->addr - last_vma); | |
396 | last_vma = ent->addr; | |
397 | need_copy = 1; | |
398 | } | |
399 | /* | |
400 | * add new row to matrix | |
401 | */ | |
402 | if (need_copy) | |
403 | emit_opcode(be, DW_LNS_copy); | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
408 | static void add_debug_line(struct buffer_ext *be, | |
409 | struct debug_entry *ent, size_t nr_entry, | |
410 | unsigned long code_addr) | |
411 | { | |
412 | struct debug_line_header * dbg_header; | |
413 | size_t old_size; | |
414 | ||
415 | old_size = buffer_ext_size(be); | |
416 | ||
417 | buffer_ext_add(be, (void *)&default_debug_line_header, | |
418 | sizeof(default_debug_line_header)); | |
419 | ||
420 | buffer_ext_add(be, &standard_opcode_length, sizeof(standard_opcode_length)); | |
421 | ||
422 | // empty directory entry | |
423 | buffer_ext_add(be, (void *)"", 1); | |
424 | ||
425 | // empty filename directory | |
426 | buffer_ext_add(be, (void *)"", 1); | |
427 | ||
428 | dbg_header = buffer_ext_addr(be) + old_size; | |
429 | dbg_header->prolog_length = (buffer_ext_size(be) - old_size) - | |
430 | offsetof(struct debug_line_header, minimum_instruction_length); | |
431 | ||
432 | emit_lineno_info(be, ent, nr_entry, code_addr); | |
433 | ||
434 | emit_lne_end_of_sequence(be); | |
435 | ||
436 | dbg_header = buffer_ext_addr(be) + old_size; | |
437 | dbg_header->total_length = (buffer_ext_size(be) - old_size) - | |
438 | offsetof(struct debug_line_header, version); | |
439 | } | |
440 | ||
441 | static void | |
442 | add_debug_abbrev(struct buffer_ext *be) | |
443 | { | |
444 | emit_unsigned_LEB128(be, 1); | |
445 | emit_unsigned_LEB128(be, DW_TAG_compile_unit); | |
446 | emit_unsigned_LEB128(be, DW_CHILDREN_yes); | |
447 | emit_unsigned_LEB128(be, DW_AT_stmt_list); | |
448 | emit_unsigned_LEB128(be, DW_FORM_data4); | |
449 | emit_unsigned_LEB128(be, 0); | |
450 | emit_unsigned_LEB128(be, 0); | |
451 | emit_unsigned_LEB128(be, 0); | |
452 | } | |
453 | ||
454 | static void | |
455 | add_compilation_unit(struct buffer_ext *be, | |
456 | size_t offset_debug_line) | |
457 | { | |
458 | struct compilation_unit_header *comp_unit_header; | |
459 | size_t old_size = buffer_ext_size(be); | |
460 | ||
461 | buffer_ext_add(be, &default_comp_unit_header, | |
462 | sizeof(default_comp_unit_header)); | |
463 | ||
464 | emit_unsigned_LEB128(be, 1); | |
465 | emit_uword(be, offset_debug_line); | |
466 | ||
467 | comp_unit_header = buffer_ext_addr(be) + old_size; | |
468 | comp_unit_header->total_length = (buffer_ext_size(be) - old_size) - | |
469 | offsetof(struct compilation_unit_header, version); | |
470 | } | |
471 | ||
472 | static int | |
473 | jit_process_debug_info(uint64_t code_addr, | |
474 | void *debug, int nr_debug_entries, | |
475 | struct buffer_ext *dl, | |
476 | struct buffer_ext *da, | |
477 | struct buffer_ext *di) | |
478 | { | |
479 | struct debug_entry *ent = debug; | |
480 | int i; | |
481 | ||
482 | for (i = 0; i < nr_debug_entries; i++) { | |
483 | ent->addr = ent->addr - code_addr; | |
484 | ent = debug_entry_next(ent); | |
485 | } | |
486 | add_compilation_unit(di, buffer_ext_size(dl)); | |
1e4bd2ae | 487 | add_debug_line(dl, debug, nr_debug_entries, GEN_ELF_TEXT_OFFSET); |
598b7c69 SE |
488 | add_debug_abbrev(da); |
489 | if (0) buffer_ext_dump(da, "abbrev"); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | int | |
495 | jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries) | |
496 | { | |
497 | Elf_Data *d; | |
498 | Elf_Scn *scn; | |
499 | Elf_Shdr *shdr; | |
500 | struct buffer_ext dl, di, da; | |
dc67c783 | 501 | int ret = -1; |
598b7c69 SE |
502 | |
503 | buffer_ext_init(&dl); | |
504 | buffer_ext_init(&di); | |
505 | buffer_ext_init(&da); | |
506 | ||
dc67c783 IR |
507 | if (jit_process_debug_info(code_addr, debug, nr_debug_entries, &dl, &da, &di)) |
508 | goto out; | |
509 | ||
598b7c69 SE |
510 | /* |
511 | * setup .debug_line section | |
512 | */ | |
513 | scn = elf_newscn(e); | |
514 | if (!scn) { | |
515 | warnx("cannot create section"); | |
dc67c783 | 516 | goto out; |
598b7c69 SE |
517 | } |
518 | ||
519 | d = elf_newdata(scn); | |
520 | if (!d) { | |
521 | warnx("cannot get new data"); | |
dc67c783 | 522 | goto out; |
598b7c69 SE |
523 | } |
524 | ||
525 | d->d_align = 1; | |
526 | d->d_off = 0LL; | |
527 | d->d_buf = buffer_ext_addr(&dl); | |
528 | d->d_type = ELF_T_BYTE; | |
529 | d->d_size = buffer_ext_size(&dl); | |
530 | d->d_version = EV_CURRENT; | |
531 | ||
532 | shdr = elf_getshdr(scn); | |
533 | if (!shdr) { | |
534 | warnx("cannot get section header"); | |
dc67c783 | 535 | goto out; |
598b7c69 SE |
536 | } |
537 | ||
538 | shdr->sh_name = 52; /* .debug_line */ | |
539 | shdr->sh_type = SHT_PROGBITS; | |
540 | shdr->sh_addr = 0; /* must be zero or == sh_offset -> dynamic object */ | |
541 | shdr->sh_flags = 0; | |
542 | shdr->sh_entsize = 0; | |
543 | ||
544 | /* | |
545 | * setup .debug_info section | |
546 | */ | |
547 | scn = elf_newscn(e); | |
548 | if (!scn) { | |
549 | warnx("cannot create section"); | |
dc67c783 | 550 | goto out; |
598b7c69 SE |
551 | } |
552 | ||
553 | d = elf_newdata(scn); | |
554 | if (!d) { | |
555 | warnx("cannot get new data"); | |
dc67c783 | 556 | goto out; |
598b7c69 SE |
557 | } |
558 | ||
559 | d->d_align = 1; | |
560 | d->d_off = 0LL; | |
561 | d->d_buf = buffer_ext_addr(&di); | |
562 | d->d_type = ELF_T_BYTE; | |
563 | d->d_size = buffer_ext_size(&di); | |
564 | d->d_version = EV_CURRENT; | |
565 | ||
566 | shdr = elf_getshdr(scn); | |
567 | if (!shdr) { | |
568 | warnx("cannot get section header"); | |
dc67c783 | 569 | goto out; |
598b7c69 SE |
570 | } |
571 | ||
572 | shdr->sh_name = 64; /* .debug_info */ | |
573 | shdr->sh_type = SHT_PROGBITS; | |
574 | shdr->sh_addr = 0; /* must be zero or == sh_offset -> dynamic object */ | |
575 | shdr->sh_flags = 0; | |
576 | shdr->sh_entsize = 0; | |
577 | ||
578 | /* | |
579 | * setup .debug_abbrev section | |
580 | */ | |
581 | scn = elf_newscn(e); | |
582 | if (!scn) { | |
583 | warnx("cannot create section"); | |
dc67c783 | 584 | goto out; |
598b7c69 SE |
585 | } |
586 | ||
587 | d = elf_newdata(scn); | |
588 | if (!d) { | |
589 | warnx("cannot get new data"); | |
dc67c783 | 590 | goto out; |
598b7c69 SE |
591 | } |
592 | ||
593 | d->d_align = 1; | |
594 | d->d_off = 0LL; | |
595 | d->d_buf = buffer_ext_addr(&da); | |
596 | d->d_type = ELF_T_BYTE; | |
597 | d->d_size = buffer_ext_size(&da); | |
598 | d->d_version = EV_CURRENT; | |
599 | ||
600 | shdr = elf_getshdr(scn); | |
601 | if (!shdr) { | |
602 | warnx("cannot get section header"); | |
dc67c783 | 603 | goto out; |
598b7c69 SE |
604 | } |
605 | ||
606 | shdr->sh_name = 76; /* .debug_info */ | |
607 | shdr->sh_type = SHT_PROGBITS; | |
608 | shdr->sh_addr = 0; /* must be zero or == sh_offset -> dynamic object */ | |
609 | shdr->sh_flags = 0; | |
610 | shdr->sh_entsize = 0; | |
611 | ||
612 | /* | |
613 | * now we update the ELF image with all the sections | |
614 | */ | |
dc67c783 | 615 | if (elf_update(e, ELF_C_WRITE) < 0) |
598b7c69 | 616 | warnx("elf_update debug failed"); |
dc67c783 IR |
617 | else |
618 | ret = 0; | |
619 | ||
620 | out: | |
621 | buffer_ext_exit(&dl); | |
622 | buffer_ext_exit(&di); | |
623 | buffer_ext_exit(&da); | |
624 | return ret; | |
598b7c69 | 625 | } |