Commit | Line | Data |
---|---|---|
0acf065b | 1 | /* Compressed section support (intended for debug sections). |
b90efa5b | 2 | Copyright (C) 2008-2015 Free Software Foundation, Inc. |
1b315056 CS |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
1b315056 | 21 | #include "sysdep.h" |
243340ad | 22 | #include <zlib.h> |
1b315056 CS |
23 | #include "bfd.h" |
24 | #include "libbfd.h" | |
a953eec9 | 25 | #include "safe-ctype.h" |
1b315056 | 26 | |
151411f8 L |
27 | #define MAX_COMPRESSION_HEADER_SIZE 24 |
28 | ||
4a114e3e L |
29 | static bfd_boolean |
30 | decompress_contents (bfd_byte *compressed_buffer, | |
31 | bfd_size_type compressed_size, | |
32 | bfd_byte *uncompressed_buffer, | |
33 | bfd_size_type uncompressed_size) | |
34 | { | |
35 | z_stream strm; | |
36 | int rc; | |
37 | ||
38 | /* It is possible the section consists of several compressed | |
39 | buffers concatenated together, so we uncompress in a loop. */ | |
de13ef81 NC |
40 | /* PR 18313: The state field in the z_stream structure is supposed |
41 | to be invisible to the user (ie us), but some compilers will | |
42 | still complain about it being used without initialisation. So | |
43 | we first zero the entire z_stream structure and then set the fields | |
44 | that we need. */ | |
45 | memset (& strm, 0, sizeof strm); | |
4a114e3e L |
46 | strm.avail_in = compressed_size - 12; |
47 | strm.next_in = (Bytef*) compressed_buffer + 12; | |
48 | strm.avail_out = uncompressed_size; | |
49 | ||
a253d456 | 50 | BFD_ASSERT (Z_OK == 0); |
4a114e3e | 51 | rc = inflateInit (&strm); |
a29a8af8 | 52 | while (strm.avail_in > 0 && strm.avail_out > 0) |
4a114e3e L |
53 | { |
54 | if (rc != Z_OK) | |
a253d456 | 55 | break; |
4a114e3e L |
56 | strm.next_out = ((Bytef*) uncompressed_buffer |
57 | + (uncompressed_size - strm.avail_out)); | |
58 | rc = inflate (&strm, Z_FINISH); | |
59 | if (rc != Z_STREAM_END) | |
a253d456 | 60 | break; |
4a114e3e L |
61 | rc = inflateReset (&strm); |
62 | } | |
a253d456 | 63 | rc |= inflateEnd (&strm); |
82c6068a | 64 | return rc == Z_OK && strm.avail_out == 0; |
4a114e3e | 65 | } |
4a114e3e | 66 | |
0b0732e1 L |
67 | /* Compress data of the size specified in @var{uncompressed_size} |
68 | and pointed to by @var{uncompressed_buffer} using zlib and store | |
69 | as the contents field. This function assumes the contents | |
18ece1de | 70 | field was allocated using bfd_malloc() or equivalent. |
1b315056 | 71 | |
151411f8 L |
72 | Return the uncompressed size if the full section contents is |
73 | compressed successfully. Otherwise return 0. */ | |
1b315056 | 74 | |
151411f8 L |
75 | static bfd_size_type |
76 | bfd_compress_section_contents (bfd *abfd, sec_ptr sec, | |
243340ad | 77 | bfd_byte *uncompressed_buffer, |
3e19fb8f | 78 | bfd_size_type uncompressed_size) |
1b315056 | 79 | { |
ae6a0217 | 80 | uLong compressed_size; |
151411f8 L |
81 | bfd_byte *buffer; |
82 | bfd_size_type buffer_size; | |
83 | bfd_boolean decompress; | |
51509926 L |
84 | #if defined(__GNUC__) && GCC_VERSION < 4007 |
85 | /* Work around a GCC uninitialized warning bug fixed in GCC 4.7. */ | |
86 | int zlib_size = 0; | |
87 | #else | |
151411f8 | 88 | int zlib_size; |
51509926 | 89 | #endif |
151411f8 L |
90 | int orig_compression_header_size; |
91 | int compression_header_size | |
92 | = bfd_get_compression_header_size (abfd, NULL); | |
93 | bfd_boolean compressed | |
94 | = bfd_is_section_compressed_with_header (abfd, sec, | |
95 | &orig_compression_header_size); | |
96 | ||
97 | if (compressed) | |
98 | { | |
99 | /* We shouldn't decompress unsupported compressed section. */ | |
100 | if (orig_compression_header_size < 0) | |
101 | abort (); | |
4a114e3e | 102 | |
151411f8 L |
103 | /* Different compression schemes. Just move the compressed section |
104 | contents to the right position. */ | |
105 | if (orig_compression_header_size == 0) | |
106 | { | |
107 | /* Convert it from .zdebug* section. Get the uncompressed | |
108 | size first. */ | |
109 | zlib_size = uncompressed_size; | |
110 | compressed_size = zlib_size + compression_header_size; | |
111 | uncompressed_size = bfd_getb64 (uncompressed_buffer + 4); | |
112 | } | |
113 | else | |
114 | { | |
115 | /* Convert it to .zdebug* section. */ | |
116 | zlib_size = uncompressed_size - orig_compression_header_size; | |
117 | compressed_size = zlib_size; | |
118 | } | |
119 | } | |
120 | else | |
121 | compressed_size = compressBound (uncompressed_size) + 12; | |
4281caad | 122 | |
151411f8 L |
123 | /* When converting from .zdebug* section, uncompress if it leads to |
124 | smaller size. */ | |
125 | if (compressed | |
126 | && orig_compression_header_size == 0 | |
127 | && compressed_size > uncompressed_size) | |
4a114e3e | 128 | { |
151411f8 L |
129 | decompress = TRUE; |
130 | buffer_size = uncompressed_size; | |
4a114e3e | 131 | } |
151411f8 L |
132 | else |
133 | { | |
134 | decompress = FALSE; | |
135 | buffer_size = compressed_size + compression_header_size; | |
136 | } | |
030aeb75 | 137 | buffer = (bfd_byte *) bfd_alloc (abfd, buffer_size); |
151411f8 L |
138 | if (buffer == NULL) |
139 | return 0; | |
4a114e3e | 140 | |
151411f8 | 141 | if (compressed) |
8d001214 | 142 | { |
151411f8 L |
143 | sec->size = uncompressed_size; |
144 | if (decompress) | |
145 | { | |
146 | if (!decompress_contents (uncompressed_buffer, zlib_size, | |
147 | buffer, uncompressed_size)) | |
148 | { | |
149 | bfd_set_error (bfd_error_bad_value); | |
030aeb75 | 150 | bfd_release (abfd, buffer); |
151411f8 L |
151 | return 0; |
152 | } | |
153 | free (uncompressed_buffer); | |
154 | sec->contents = buffer; | |
155 | sec->compress_status = COMPRESS_SECTION_DONE; | |
156 | return uncompressed_size; | |
157 | } | |
158 | else | |
159 | { | |
160 | bfd_update_compression_header (abfd, buffer, sec); | |
161 | memmove (buffer + compression_header_size, | |
162 | uncompressed_buffer + orig_compression_header_size, | |
163 | zlib_size); | |
164 | } | |
8d001214 L |
165 | } |
166 | else | |
167 | { | |
151411f8 L |
168 | bfd_size_type size = uncompressed_size; |
169 | int header_size = 12 + compression_header_size; | |
170 | if (compress ((Bytef*) buffer + header_size, | |
171 | &compressed_size, | |
172 | (const Bytef*) uncompressed_buffer, | |
173 | uncompressed_size) != Z_OK) | |
174 | { | |
030aeb75 | 175 | bfd_release (abfd, buffer); |
151411f8 L |
176 | bfd_set_error (bfd_error_bad_value); |
177 | return 0; | |
178 | } | |
179 | ||
180 | compressed_size += header_size; | |
181 | /* PR binutils/18087: If compression didn't make the section smaller, | |
3e19fb8f L |
182 | just keep it uncompressed. */ |
183 | if (compressed_size < uncompressed_size) | |
151411f8 L |
184 | { |
185 | bfd_update_compression_header (abfd, buffer, sec); | |
186 | ||
187 | /* Write the zlib header. In this case, it should be "ZLIB" | |
188 | followed by the uncompressed section size, 8 bytes in | |
189 | big-endian order. */ | |
190 | memcpy (buffer + compression_header_size, "ZLIB", 4); | |
191 | bfd_putb64 (size, buffer + compression_header_size + 4); | |
192 | } | |
193 | else | |
194 | { | |
030aeb75 L |
195 | /* NOTE: There is a small memory leak here since |
196 | uncompressed_buffer is malloced and won't be freed. */ | |
197 | bfd_release (abfd, buffer); | |
151411f8 L |
198 | sec->contents = uncompressed_buffer; |
199 | sec->compress_status = COMPRESS_SECTION_NONE; | |
200 | return uncompressed_size; | |
201 | } | |
8d001214 | 202 | } |
4a114e3e | 203 | |
151411f8 L |
204 | free (uncompressed_buffer); |
205 | sec->contents = buffer; | |
206 | sec->size = compressed_size; | |
207 | sec->compress_status = COMPRESS_SECTION_DONE; | |
208 | ||
209 | return uncompressed_size; | |
4a114e3e L |
210 | } |
211 | ||
212 | /* | |
213 | FUNCTION | |
214 | bfd_get_full_section_contents | |
215 | ||
216 | SYNOPSIS | |
217 | bfd_boolean bfd_get_full_section_contents | |
218 | (bfd *abfd, asection *section, bfd_byte **ptr); | |
219 | ||
220 | DESCRIPTION | |
221 | Read all data from @var{section} in BFD @var{abfd}, decompress | |
222 | if needed, and store in @var{*ptr}. If @var{*ptr} is NULL, | |
68ffbac6 | 223 | return @var{*ptr} with memory malloc'd by this function. |
4a114e3e L |
224 | |
225 | Return @code{TRUE} if the full section contents is retrieved | |
06614111 NC |
226 | successfully. If the section has no contents then this function |
227 | returns @code{TRUE} but @var{*ptr} is set to NULL. | |
4a114e3e L |
228 | */ |
229 | ||
230 | bfd_boolean | |
231 | bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr) | |
232 | { | |
e57278ef | 233 | bfd_size_type sz; |
4a114e3e | 234 | bfd_byte *p = *ptr; |
82c6068a | 235 | bfd_boolean ret; |
38b774d2 AM |
236 | bfd_size_type save_size; |
237 | bfd_size_type save_rawsize; | |
4a114e3e | 238 | bfd_byte *compressed_buffer; |
151411f8 | 239 | unsigned int compression_header_size; |
4a114e3e | 240 | |
e57278ef AM |
241 | if (abfd->direction != write_direction && sec->rawsize != 0) |
242 | sz = sec->rawsize; | |
243 | else | |
244 | sz = sec->size; | |
4a114e3e | 245 | if (sz == 0) |
06614111 NC |
246 | { |
247 | *ptr = NULL; | |
248 | return TRUE; | |
249 | } | |
4a114e3e L |
250 | |
251 | switch (sec->compress_status) | |
252 | { | |
253 | case COMPRESS_SECTION_NONE: | |
254 | if (p == NULL) | |
255 | { | |
0d13c96b | 256 | p = (bfd_byte *) bfd_malloc (sz); |
4a114e3e L |
257 | if (p == NULL) |
258 | return FALSE; | |
4a114e3e | 259 | } |
06614111 | 260 | |
82c6068a AM |
261 | if (!bfd_get_section_contents (abfd, sec, p, 0, sz)) |
262 | { | |
263 | if (*ptr != p) | |
264 | free (p); | |
265 | return FALSE; | |
266 | } | |
267 | *ptr = p; | |
4a114e3e L |
268 | return TRUE; |
269 | ||
270 | case DECOMPRESS_SECTION_SIZED: | |
82c6068a | 271 | /* Read in the full compressed section contents. */ |
38b774d2 | 272 | compressed_buffer = (bfd_byte *) bfd_malloc (sec->compressed_size); |
82c6068a AM |
273 | if (compressed_buffer == NULL) |
274 | return FALSE; | |
38b774d2 AM |
275 | save_rawsize = sec->rawsize; |
276 | save_size = sec->size; | |
82c6068a AM |
277 | /* Clear rawsize, set size to compressed size and set compress_status |
278 | to COMPRESS_SECTION_NONE. If the compressed size is bigger than | |
279 | the uncompressed size, bfd_get_section_contents will fail. */ | |
280 | sec->rawsize = 0; | |
38b774d2 | 281 | sec->size = sec->compressed_size; |
82c6068a AM |
282 | sec->compress_status = COMPRESS_SECTION_NONE; |
283 | ret = bfd_get_section_contents (abfd, sec, compressed_buffer, | |
38b774d2 | 284 | 0, sec->compressed_size); |
82c6068a | 285 | /* Restore rawsize and size. */ |
38b774d2 AM |
286 | sec->rawsize = save_rawsize; |
287 | sec->size = save_size; | |
4a114e3e | 288 | sec->compress_status = DECOMPRESS_SECTION_SIZED; |
82c6068a AM |
289 | if (!ret) |
290 | goto fail_compressed; | |
4a114e3e | 291 | |
38b774d2 AM |
292 | if (p == NULL) |
293 | p = (bfd_byte *) bfd_malloc (sz); | |
294 | if (p == NULL) | |
4a114e3e | 295 | goto fail_compressed; |
4a114e3e | 296 | |
151411f8 L |
297 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
298 | if (!decompress_contents (compressed_buffer + compression_header_size, | |
299 | sec->compressed_size, p, sz)) | |
82c6068a AM |
300 | { |
301 | bfd_set_error (bfd_error_bad_value); | |
38b774d2 AM |
302 | if (p != *ptr) |
303 | free (p); | |
82c6068a AM |
304 | fail_compressed: |
305 | free (compressed_buffer); | |
306 | return FALSE; | |
307 | } | |
4a114e3e | 308 | |
82c6068a | 309 | free (compressed_buffer); |
38b774d2 AM |
310 | *ptr = p; |
311 | return TRUE; | |
4a114e3e | 312 | |
82c6068a | 313 | case COMPRESS_SECTION_DONE: |
db6b071a NC |
314 | if (sec->contents == NULL) |
315 | return FALSE; | |
82c6068a AM |
316 | if (p == NULL) |
317 | { | |
318 | p = (bfd_byte *) bfd_malloc (sz); | |
319 | if (p == NULL) | |
320 | return FALSE; | |
321 | *ptr = p; | |
322 | } | |
06614111 NC |
323 | /* PR 17512; file: 5bc29788. */ |
324 | if (p != sec->contents) | |
325 | memcpy (p, sec->contents, sz); | |
82c6068a | 326 | return TRUE; |
4a114e3e | 327 | |
82c6068a AM |
328 | default: |
329 | abort (); | |
330 | } | |
4a114e3e L |
331 | } |
332 | ||
8a72cc6e AM |
333 | /* |
334 | FUNCTION | |
335 | bfd_cache_section_contents | |
336 | ||
337 | SYNOPSIS | |
338 | void bfd_cache_section_contents | |
339 | (asection *sec, void *contents); | |
340 | ||
341 | DESCRIPTION | |
342 | Stash @var(contents) so any following reads of @var(sec) do | |
343 | not need to decompress again. | |
344 | */ | |
345 | ||
346 | void | |
347 | bfd_cache_section_contents (asection *sec, void *contents) | |
348 | { | |
349 | if (sec->compress_status == DECOMPRESS_SECTION_SIZED) | |
350 | sec->compress_status = COMPRESS_SECTION_DONE; | |
351 | sec->contents = contents; | |
352 | sec->flags |= SEC_IN_MEMORY; | |
353 | } | |
354 | ||
4a114e3e L |
355 | /* |
356 | FUNCTION | |
151411f8 | 357 | bfd_is_section_compressed_with_header |
4a114e3e L |
358 | |
359 | SYNOPSIS | |
151411f8 L |
360 | bfd_boolean bfd_is_section_compressed_with_header |
361 | (bfd *abfd, asection *section, | |
362 | int *compression_header_size_p); | |
4a114e3e L |
363 | |
364 | DESCRIPTION | |
151411f8 L |
365 | Return @code{TRUE} if @var{section} is compressed. Compression |
366 | header size is returned in @var{compression_header_size_p}. If | |
367 | compression is unsupported, compression header size is returned | |
368 | with -1. | |
4a114e3e L |
369 | */ |
370 | ||
371 | bfd_boolean | |
151411f8 L |
372 | bfd_is_section_compressed_with_header (bfd *abfd, sec_ptr sec, |
373 | int *compression_header_size_p) | |
4a114e3e | 374 | { |
151411f8 L |
375 | bfd_byte header[MAX_COMPRESSION_HEADER_SIZE + 12]; |
376 | int compression_header_size; | |
377 | int header_size = 12; | |
64f40162 L |
378 | unsigned int saved = sec->compress_status; |
379 | bfd_boolean compressed; | |
380 | ||
151411f8 L |
381 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
382 | if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE) | |
383 | abort (); | |
384 | header_size += compression_header_size; | |
385 | ||
64f40162 L |
386 | /* Don't decompress the section. */ |
387 | sec->compress_status = COMPRESS_SECTION_NONE; | |
4a114e3e L |
388 | |
389 | /* Read the zlib header. In this case, it should be "ZLIB" followed | |
390 | by the uncompressed section size, 8 bytes in big-endian order. */ | |
151411f8 L |
391 | compressed = bfd_get_section_contents (abfd, sec, header, 0, |
392 | header_size) | |
393 | && CONST_STRNEQ ((char*) header + compression_header_size, | |
394 | "ZLIB"); | |
64f40162 | 395 | |
151411f8 L |
396 | if (compressed) |
397 | { | |
398 | if (compression_header_size != 0) | |
399 | { | |
400 | bfd_size_type uncompressed_size | |
401 | = bfd_getb64 ((bfd_byte *) header | |
402 | + compression_header_size + 4); | |
403 | if (!bfd_check_compression_header (abfd, header, sec, | |
404 | uncompressed_size)) | |
405 | compression_header_size = -1; | |
406 | } | |
407 | /* Check for the pathalogical case of a debug string section that | |
408 | contains the string ZLIB.... as the first entry. We assume that | |
409 | no uncompressed .debug_str section would ever be big enough to | |
410 | have the first byte of its (big-endian) size be non-zero. */ | |
411 | else if (strcmp (sec->name, ".debug_str") == 0 | |
412 | && ISPRINT (header[compression_header_size + 4])) | |
413 | compressed = FALSE; | |
414 | } | |
a953eec9 | 415 | |
64f40162 L |
416 | /* Restore compress_status. */ |
417 | sec->compress_status = saved; | |
151411f8 | 418 | *compression_header_size_p = compression_header_size; |
64f40162 | 419 | return compressed; |
4a114e3e L |
420 | } |
421 | ||
151411f8 L |
422 | /* |
423 | FUNCTION | |
424 | bfd_is_section_compressed | |
425 | ||
426 | SYNOPSIS | |
427 | bfd_boolean bfd_is_section_compressed | |
428 | (bfd *abfd, asection *section); | |
429 | ||
430 | DESCRIPTION | |
431 | Return @code{TRUE} if @var{section} is compressed. | |
432 | */ | |
433 | ||
434 | bfd_boolean | |
435 | bfd_is_section_compressed (bfd *abfd, sec_ptr sec) | |
436 | { | |
437 | int compression_header_size; | |
438 | return (bfd_is_section_compressed_with_header (abfd, sec, | |
439 | &compression_header_size) | |
440 | && compression_header_size >= 0); | |
441 | } | |
442 | ||
4a114e3e L |
443 | /* |
444 | FUNCTION | |
445 | bfd_init_section_decompress_status | |
446 | ||
447 | SYNOPSIS | |
448 | bfd_boolean bfd_init_section_decompress_status | |
449 | (bfd *abfd, asection *section); | |
450 | ||
451 | DESCRIPTION | |
452 | Record compressed section size, update section size with | |
453 | decompressed size and set compress_status to | |
454 | DECOMPRESS_SECTION_SIZED. | |
455 | ||
456 | Return @code{FALSE} if the section is not a valid compressed | |
18ece1de | 457 | section. Otherwise, return @code{TRUE}. |
4a114e3e L |
458 | */ |
459 | ||
460 | bfd_boolean | |
243340ad | 461 | bfd_init_section_decompress_status (bfd *abfd, sec_ptr sec) |
4a114e3e | 462 | { |
151411f8 L |
463 | bfd_byte header[MAX_COMPRESSION_HEADER_SIZE + 12]; |
464 | int compression_header_size; | |
465 | int header_size = 12; | |
4a114e3e L |
466 | bfd_size_type uncompressed_size; |
467 | ||
151411f8 L |
468 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
469 | if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE) | |
470 | abort (); | |
471 | header_size += compression_header_size; | |
472 | ||
4a114e3e L |
473 | if (sec->rawsize != 0 |
474 | || sec->contents != NULL | |
475 | || sec->compress_status != COMPRESS_SECTION_NONE | |
151411f8 | 476 | || !bfd_get_section_contents (abfd, sec, header, 0, header_size)) |
4a114e3e L |
477 | { |
478 | bfd_set_error (bfd_error_invalid_operation); | |
479 | return FALSE; | |
480 | } | |
1b315056 CS |
481 | |
482 | /* Read the zlib header. In this case, it should be "ZLIB" followed | |
483 | by the uncompressed section size, 8 bytes in big-endian order. */ | |
151411f8 | 484 | if (! CONST_STRNEQ ((char*) header + compression_header_size, "ZLIB")) |
4a114e3e L |
485 | { |
486 | bfd_set_error (bfd_error_wrong_format); | |
487 | return FALSE; | |
488 | } | |
489 | ||
151411f8 L |
490 | uncompressed_size = bfd_getb64 (header + compression_header_size + 4); |
491 | if (compression_header_size != 0 | |
492 | && !bfd_check_compression_header (abfd, header, sec, | |
493 | uncompressed_size)) | |
494 | { | |
495 | bfd_set_error (bfd_error_wrong_format); | |
496 | return FALSE; | |
497 | } | |
4a114e3e L |
498 | sec->compressed_size = sec->size; |
499 | sec->size = uncompressed_size; | |
500 | sec->compress_status = DECOMPRESS_SECTION_SIZED; | |
1b315056 | 501 | |
4a114e3e | 502 | return TRUE; |
4a114e3e L |
503 | } |
504 | ||
505 | /* | |
506 | FUNCTION | |
507 | bfd_init_section_compress_status | |
508 | ||
509 | SYNOPSIS | |
510 | bfd_boolean bfd_init_section_compress_status | |
511 | (bfd *abfd, asection *section); | |
512 | ||
513 | DESCRIPTION | |
514 | If open for read, compress section, update section size with | |
515 | compressed size and set compress_status to COMPRESS_SECTION_DONE. | |
516 | ||
517 | Return @code{FALSE} if the section is not a valid compressed | |
18ece1de | 518 | section. Otherwise, return @code{TRUE}. |
4a114e3e L |
519 | */ |
520 | ||
521 | bfd_boolean | |
243340ad | 522 | bfd_init_section_compress_status (bfd *abfd, sec_ptr sec) |
4a114e3e | 523 | { |
4a114e3e L |
524 | bfd_size_type uncompressed_size; |
525 | bfd_byte *uncompressed_buffer; | |
526 | bfd_boolean ret; | |
527 | ||
528 | /* Error if not opened for read. */ | |
529 | if (abfd->direction != read_direction | |
530 | || sec->size == 0 | |
531 | || sec->rawsize != 0 | |
532 | || sec->contents != NULL | |
533 | || sec->compress_status != COMPRESS_SECTION_NONE) | |
1b315056 | 534 | { |
4a114e3e L |
535 | bfd_set_error (bfd_error_invalid_operation); |
536 | return FALSE; | |
1b315056 | 537 | } |
1b315056 | 538 | |
4a114e3e L |
539 | /* Read in the full section contents and compress it. */ |
540 | uncompressed_size = sec->size; | |
541 | uncompressed_buffer = (bfd_byte *) bfd_malloc (uncompressed_size); | |
542 | if (!bfd_get_section_contents (abfd, sec, uncompressed_buffer, | |
543 | 0, uncompressed_size)) | |
544 | ret = FALSE; | |
545 | else | |
151411f8 L |
546 | { |
547 | uncompressed_size = bfd_compress_section_contents (abfd, sec, | |
548 | uncompressed_buffer, | |
3e19fb8f | 549 | uncompressed_size); |
151411f8 L |
550 | ret = uncompressed_size != 0; |
551 | } | |
1b315056 | 552 | |
4a114e3e | 553 | return ret; |
1b315056 | 554 | } |
0ce398f1 L |
555 | |
556 | /* | |
557 | FUNCTION | |
558 | bfd_compress_section | |
559 | ||
560 | SYNOPSIS | |
561 | bfd_boolean bfd_compress_section | |
562 | (bfd *abfd, asection *section, bfd_byte *uncompressed_buffer); | |
563 | ||
564 | DESCRIPTION | |
565 | If open for write, compress section, update section size with | |
566 | compressed size and set compress_status to COMPRESS_SECTION_DONE. | |
567 | ||
568 | Return @code{FALSE} if compression fail. Otherwise, return | |
569 | @code{TRUE}. | |
570 | */ | |
571 | ||
572 | bfd_boolean | |
573 | bfd_compress_section (bfd *abfd, sec_ptr sec, bfd_byte *uncompressed_buffer) | |
574 | { | |
575 | bfd_size_type uncompressed_size = sec->size; | |
576 | ||
577 | /* Error if not opened for write. */ | |
578 | if (abfd->direction != write_direction | |
579 | || uncompressed_size == 0 | |
580 | || uncompressed_buffer == NULL | |
581 | || sec->contents != NULL | |
582 | || sec->compressed_size != 0 | |
583 | || sec->compress_status != COMPRESS_SECTION_NONE) | |
584 | { | |
585 | bfd_set_error (bfd_error_invalid_operation); | |
586 | return FALSE; | |
587 | } | |
588 | ||
589 | /* Compress it. */ | |
590 | return bfd_compress_section_contents (abfd, sec, uncompressed_buffer, | |
3e19fb8f | 591 | uncompressed_size) != 0; |
0ce398f1 | 592 | } |