1 /* Assorted BFD support routines, only used internally.
2 Copyright (C) 1990-2018 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program 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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #ifndef HAVE_GETPAGESIZE
27 #define getpagesize() 2048
32 Implementation details
38 These routines are used within BFD.
39 They are not intended for export, but are documented here for
44 _bfd_bool_bfd_false (bfd *abfd ATTRIBUTE_UNUSED)
50 _bfd_bool_bfd_asymbol_false (bfd *abfd ATTRIBUTE_UNUSED,
51 asymbol *sym ATTRIBUTE_UNUSED)
56 /* A routine which is used in target vectors for unsupported
60 _bfd_bool_bfd_false_error (bfd *ignore ATTRIBUTE_UNUSED)
62 bfd_set_error (bfd_error_invalid_operation);
67 _bfd_bool_bfd_link_false_error (bfd *abfd,
68 struct bfd_link_info *info ATTRIBUTE_UNUSED)
70 return _bfd_bool_bfd_false_error (abfd);
73 /* A routine which is used in target vectors for supported operations
74 which do not actually do anything. */
77 _bfd_bool_bfd_true (bfd *ignore ATTRIBUTE_UNUSED)
83 _bfd_bool_bfd_link_true (bfd *abfd ATTRIBUTE_UNUSED,
84 struct bfd_link_info *info ATTRIBUTE_UNUSED)
90 _bfd_bool_bfd_bfd_true (bfd *ibfd ATTRIBUTE_UNUSED,
91 bfd *obfd ATTRIBUTE_UNUSED)
97 _bfd_bool_bfd_uint_true (bfd *abfd ATTRIBUTE_UNUSED,
98 unsigned int flags ATTRIBUTE_UNUSED)
104 _bfd_bool_bfd_asection_bfd_asection_true (bfd *ibfd ATTRIBUTE_UNUSED,
105 asection *isec ATTRIBUTE_UNUSED,
106 bfd *obfd ATTRIBUTE_UNUSED,
107 asection *osec ATTRIBUTE_UNUSED)
113 _bfd_bool_bfd_asymbol_bfd_asymbol_true (bfd *ibfd ATTRIBUTE_UNUSED,
114 asymbol *isym ATTRIBUTE_UNUSED,
115 bfd *obfd ATTRIBUTE_UNUSED,
116 asymbol *osym ATTRIBUTE_UNUSED)
122 _bfd_bool_bfd_ptr_true (bfd *abfd ATTRIBUTE_UNUSED,
123 void *ptr ATTRIBUTE_UNUSED)
128 /* A routine which is used in target vectors for unsupported
129 operations which return a pointer value. */
132 _bfd_ptr_bfd_null_error (bfd *ignore ATTRIBUTE_UNUSED)
134 bfd_set_error (bfd_error_invalid_operation);
139 _bfd_int_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
145 _bfd_uint_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
151 _bfd_long_bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
156 /* A routine which is used in target vectors for unsupported
157 operations which return -1 on error. */
160 _bfd_long_bfd_n1_error (bfd *ignore_abfd ATTRIBUTE_UNUSED)
162 bfd_set_error (bfd_error_invalid_operation);
167 _bfd_void_bfd (bfd *ignore ATTRIBUTE_UNUSED)
172 _bfd_void_bfd_link (bfd *abfd ATTRIBUTE_UNUSED,
173 struct bfd_link_info *info ATTRIBUTE_UNUSED)
178 _bfd_void_bfd_asection (bfd *abfd ATTRIBUTE_UNUSED,
179 asection *sec ATTRIBUTE_UNUSED)
184 _bfd_norelocs_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
185 asection *sec ATTRIBUTE_UNUSED)
187 return sizeof (arelent *);
191 _bfd_norelocs_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED,
192 asection *sec ATTRIBUTE_UNUSED,
194 asymbol **symbols ATTRIBUTE_UNUSED)
201 _bfd_norelocs_set_reloc (bfd *abfd ATTRIBUTE_UNUSED,
202 asection *sec ATTRIBUTE_UNUSED,
203 arelent **relptr ATTRIBUTE_UNUSED,
204 unsigned int count ATTRIBUTE_UNUSED)
210 _bfd_nocore_core_file_matches_executable_p
211 (bfd *ignore_core_bfd ATTRIBUTE_UNUSED,
212 bfd *ignore_exec_bfd ATTRIBUTE_UNUSED)
214 bfd_set_error (bfd_error_invalid_operation);
218 /* Routine to handle core_file_failing_command entry point for targets
219 without core file support. */
222 _bfd_nocore_core_file_failing_command (bfd *ignore_abfd ATTRIBUTE_UNUSED)
224 bfd_set_error (bfd_error_invalid_operation);
228 /* Routine to handle core_file_failing_signal entry point for targets
229 without core file support. */
232 _bfd_nocore_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED)
234 bfd_set_error (bfd_error_invalid_operation);
238 /* Routine to handle the core_file_pid entry point for targets without
239 core file support. */
242 _bfd_nocore_core_file_pid (bfd *ignore_abfd ATTRIBUTE_UNUSED)
244 bfd_set_error (bfd_error_invalid_operation);
249 _bfd_dummy_target (bfd *ignore_abfd ATTRIBUTE_UNUSED)
251 bfd_set_error (bfd_error_wrong_format);
255 /* Allocate memory using malloc. */
258 bfd_malloc (bfd_size_type size)
261 size_t sz = (size_t) size;
264 /* This is to pacify memory checkers like valgrind. */
265 || ((signed long) sz) < 0)
267 bfd_set_error (bfd_error_no_memory);
272 if (ptr == NULL && sz != 0)
273 bfd_set_error (bfd_error_no_memory);
278 /* Allocate memory using malloc, nmemb * size with overflow checking. */
281 bfd_malloc2 (bfd_size_type nmemb, bfd_size_type size)
283 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
285 && nmemb > ~(bfd_size_type) 0 / size)
287 bfd_set_error (bfd_error_no_memory);
291 return bfd_malloc (size * nmemb);
294 /* Reallocate memory using realloc. */
297 bfd_realloc (void *ptr, bfd_size_type size)
300 size_t sz = (size_t) size;
303 return bfd_malloc (size);
306 /* This is to pacify memory checkers like valgrind. */
307 || ((signed long) sz) < 0)
309 bfd_set_error (bfd_error_no_memory);
313 ret = realloc (ptr, sz);
315 if (ret == NULL && sz != 0)
316 bfd_set_error (bfd_error_no_memory);
321 /* Reallocate memory using realloc, nmemb * size with overflow checking. */
324 bfd_realloc2 (void *ptr, bfd_size_type nmemb, bfd_size_type size)
326 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
328 && nmemb > ~(bfd_size_type) 0 / size)
330 bfd_set_error (bfd_error_no_memory);
334 return bfd_realloc (ptr, size * nmemb);
337 /* Reallocate memory using realloc.
338 If this fails the pointer is freed before returning. */
341 bfd_realloc_or_free (void *ptr, bfd_size_type size)
343 void *ret = bfd_realloc (ptr, size);
345 if (ret == NULL && ptr != NULL)
351 /* Allocate memory using malloc and clear it. */
354 bfd_zmalloc (bfd_size_type size)
356 void *ptr = bfd_malloc (size);
358 if (ptr != NULL && size > 0)
359 memset (ptr, 0, (size_t) size);
364 /* Allocate memory using malloc (nmemb * size) with overflow checking
368 bfd_zmalloc2 (bfd_size_type nmemb, bfd_size_type size)
370 void *ptr = bfd_malloc2 (nmemb, size);
374 size_t sz = nmemb * size;
385 bfd_write_bigendian_4byte_int
388 bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int);
391 Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
392 endian order regardless of what else is going on. This is useful in
397 bfd_write_bigendian_4byte_int (bfd *abfd, unsigned int i)
400 bfd_putb32 ((bfd_vma) i, buffer);
401 return bfd_bwrite (buffer, (bfd_size_type) 4, abfd) == 4;
405 /** The do-it-yourself (byte) sex-change kit */
407 /* The middle letter e.g. get<b>short indicates Big or Little endian
408 target machine. It doesn't matter what the byte order of the host
409 machine is; these routines work for either. */
411 /* FIXME: Should these take a count argument?
412 Answer (gnu@cygnus.com): No, but perhaps they should be inline
413 functions in swap.h #ifdef __GNUC__.
414 Gprof them later and find out. */
423 These macros as used for reading and writing raw data in
424 sections; each access (except for bytes) is vectored through
425 the target format of the BFD and mangled accordingly. The
426 mangling performs any necessary endian translations and
427 removes alignment restrictions. Note that types accepted and
428 returned by these macros are identical so they can be swapped
429 around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
430 to either <<bfd_get_32>> or <<bfd_get_64>>.
432 In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a
433 system without prototypes, the caller is responsible for making
434 sure that is true, with a cast if necessary. We don't cast
435 them in the macro definitions because that would prevent <<lint>>
436 or <<gcc -Wall>> from detecting sins such as passing a pointer.
437 To detect calling these with less than a <<bfd_vma>>, use
438 <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
441 .{* Byte swapping macros for user section data. *}
443 .#define bfd_put_8(abfd, val, ptr) \
444 . ((void) (*((unsigned char *) (ptr)) = (val) & 0xff))
445 .#define bfd_put_signed_8 \
447 .#define bfd_get_8(abfd, ptr) \
448 . (*(const unsigned char *) (ptr) & 0xff)
449 .#define bfd_get_signed_8(abfd, ptr) \
450 . (((*(const unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80)
452 .#define bfd_put_16(abfd, val, ptr) \
453 . BFD_SEND (abfd, bfd_putx16, ((val),(ptr)))
454 .#define bfd_put_signed_16 \
456 .#define bfd_get_16(abfd, ptr) \
457 . BFD_SEND (abfd, bfd_getx16, (ptr))
458 .#define bfd_get_signed_16(abfd, ptr) \
459 . BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
461 .#define bfd_put_32(abfd, val, ptr) \
462 . BFD_SEND (abfd, bfd_putx32, ((val),(ptr)))
463 .#define bfd_put_signed_32 \
465 .#define bfd_get_32(abfd, ptr) \
466 . BFD_SEND (abfd, bfd_getx32, (ptr))
467 .#define bfd_get_signed_32(abfd, ptr) \
468 . BFD_SEND (abfd, bfd_getx_signed_32, (ptr))
470 .#define bfd_put_64(abfd, val, ptr) \
471 . BFD_SEND (abfd, bfd_putx64, ((val), (ptr)))
472 .#define bfd_put_signed_64 \
474 .#define bfd_get_64(abfd, ptr) \
475 . BFD_SEND (abfd, bfd_getx64, (ptr))
476 .#define bfd_get_signed_64(abfd, ptr) \
477 . BFD_SEND (abfd, bfd_getx_signed_64, (ptr))
479 .#define bfd_get(bits, abfd, ptr) \
480 . ((bits) == 8 ? (bfd_vma) bfd_get_8 (abfd, ptr) \
481 . : (bits) == 16 ? bfd_get_16 (abfd, ptr) \
482 . : (bits) == 32 ? bfd_get_32 (abfd, ptr) \
483 . : (bits) == 64 ? bfd_get_64 (abfd, ptr) \
484 . : (abort (), (bfd_vma) - 1))
486 .#define bfd_put(bits, abfd, val, ptr) \
487 . ((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
488 . : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
489 . : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
490 . : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
491 . : (abort (), (void) 0))
501 These macros have the same function as their <<bfd_get_x>>
502 brethren, except that they are used for removing information
503 for the header records of object files. Believe it or not,
504 some object files keep their header records in big endian
505 order and their data in little endian order.
507 .{* Byte swapping macros for file header data. *}
509 .#define bfd_h_put_8(abfd, val, ptr) \
510 . bfd_put_8 (abfd, val, ptr)
511 .#define bfd_h_put_signed_8(abfd, val, ptr) \
512 . bfd_put_8 (abfd, val, ptr)
513 .#define bfd_h_get_8(abfd, ptr) \
514 . bfd_get_8 (abfd, ptr)
515 .#define bfd_h_get_signed_8(abfd, ptr) \
516 . bfd_get_signed_8 (abfd, ptr)
518 .#define bfd_h_put_16(abfd, val, ptr) \
519 . BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
520 .#define bfd_h_put_signed_16 \
522 .#define bfd_h_get_16(abfd, ptr) \
523 . BFD_SEND (abfd, bfd_h_getx16, (ptr))
524 .#define bfd_h_get_signed_16(abfd, ptr) \
525 . BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
527 .#define bfd_h_put_32(abfd, val, ptr) \
528 . BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
529 .#define bfd_h_put_signed_32 \
531 .#define bfd_h_get_32(abfd, ptr) \
532 . BFD_SEND (abfd, bfd_h_getx32, (ptr))
533 .#define bfd_h_get_signed_32(abfd, ptr) \
534 . BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
536 .#define bfd_h_put_64(abfd, val, ptr) \
537 . BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
538 .#define bfd_h_put_signed_64 \
540 .#define bfd_h_get_64(abfd, ptr) \
541 . BFD_SEND (abfd, bfd_h_getx64, (ptr))
542 .#define bfd_h_get_signed_64(abfd, ptr) \
543 . BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
545 .{* Aliases for the above, which should eventually go away. *}
547 .#define H_PUT_64 bfd_h_put_64
548 .#define H_PUT_32 bfd_h_put_32
549 .#define H_PUT_16 bfd_h_put_16
550 .#define H_PUT_8 bfd_h_put_8
551 .#define H_PUT_S64 bfd_h_put_signed_64
552 .#define H_PUT_S32 bfd_h_put_signed_32
553 .#define H_PUT_S16 bfd_h_put_signed_16
554 .#define H_PUT_S8 bfd_h_put_signed_8
555 .#define H_GET_64 bfd_h_get_64
556 .#define H_GET_32 bfd_h_get_32
557 .#define H_GET_16 bfd_h_get_16
558 .#define H_GET_8 bfd_h_get_8
559 .#define H_GET_S64 bfd_h_get_signed_64
560 .#define H_GET_S32 bfd_h_get_signed_32
561 .#define H_GET_S16 bfd_h_get_signed_16
562 .#define H_GET_S8 bfd_h_get_signed_8
566 /* Sign extension to bfd_signed_vma. */
567 #define COERCE16(x) (((bfd_vma) (x) ^ 0x8000) - 0x8000)
568 #define COERCE32(x) (((bfd_vma) (x) ^ 0x80000000) - 0x80000000)
569 #define COERCE64(x) \
570 (((bfd_uint64_t) (x) ^ ((bfd_uint64_t) 1 << 63)) - ((bfd_uint64_t) 1 << 63))
573 bfd_getb16 (const void *p)
575 const bfd_byte *addr = (const bfd_byte *) p;
576 return (addr[0] << 8) | addr[1];
580 bfd_getl16 (const void *p)
582 const bfd_byte *addr = (const bfd_byte *) p;
583 return (addr[1] << 8) | addr[0];
587 bfd_getb_signed_16 (const void *p)
589 const bfd_byte *addr = (const bfd_byte *) p;
590 return COERCE16 ((addr[0] << 8) | addr[1]);
594 bfd_getl_signed_16 (const void *p)
596 const bfd_byte *addr = (const bfd_byte *) p;
597 return COERCE16 ((addr[1] << 8) | addr[0]);
601 bfd_putb16 (bfd_vma data, void *p)
603 bfd_byte *addr = (bfd_byte *) p;
604 addr[0] = (data >> 8) & 0xff;
605 addr[1] = data & 0xff;
609 bfd_putl16 (bfd_vma data, void *p)
611 bfd_byte *addr = (bfd_byte *) p;
612 addr[0] = data & 0xff;
613 addr[1] = (data >> 8) & 0xff;
617 bfd_getb32 (const void *p)
619 const bfd_byte *addr = (const bfd_byte *) p;
622 v = (unsigned long) addr[0] << 24;
623 v |= (unsigned long) addr[1] << 16;
624 v |= (unsigned long) addr[2] << 8;
625 v |= (unsigned long) addr[3];
630 bfd_getl32 (const void *p)
632 const bfd_byte *addr = (const bfd_byte *) p;
635 v = (unsigned long) addr[0];
636 v |= (unsigned long) addr[1] << 8;
637 v |= (unsigned long) addr[2] << 16;
638 v |= (unsigned long) addr[3] << 24;
643 bfd_getb_signed_32 (const void *p)
645 const bfd_byte *addr = (const bfd_byte *) p;
648 v = (unsigned long) addr[0] << 24;
649 v |= (unsigned long) addr[1] << 16;
650 v |= (unsigned long) addr[2] << 8;
651 v |= (unsigned long) addr[3];
656 bfd_getl_signed_32 (const void *p)
658 const bfd_byte *addr = (const bfd_byte *) p;
661 v = (unsigned long) addr[0];
662 v |= (unsigned long) addr[1] << 8;
663 v |= (unsigned long) addr[2] << 16;
664 v |= (unsigned long) addr[3] << 24;
669 bfd_getb64 (const void *p ATTRIBUTE_UNUSED)
671 #ifdef BFD_HOST_64_BIT
672 const bfd_byte *addr = (const bfd_byte *) p;
675 v = addr[0]; v <<= 8;
676 v |= addr[1]; v <<= 8;
677 v |= addr[2]; v <<= 8;
678 v |= addr[3]; v <<= 8;
679 v |= addr[4]; v <<= 8;
680 v |= addr[5]; v <<= 8;
681 v |= addr[6]; v <<= 8;
692 bfd_getl64 (const void *p ATTRIBUTE_UNUSED)
694 #ifdef BFD_HOST_64_BIT
695 const bfd_byte *addr = (const bfd_byte *) p;
698 v = addr[7]; v <<= 8;
699 v |= addr[6]; v <<= 8;
700 v |= addr[5]; v <<= 8;
701 v |= addr[4]; v <<= 8;
702 v |= addr[3]; v <<= 8;
703 v |= addr[2]; v <<= 8;
704 v |= addr[1]; v <<= 8;
716 bfd_getb_signed_64 (const void *p ATTRIBUTE_UNUSED)
718 #ifdef BFD_HOST_64_BIT
719 const bfd_byte *addr = (const bfd_byte *) p;
722 v = addr[0]; v <<= 8;
723 v |= addr[1]; v <<= 8;
724 v |= addr[2]; v <<= 8;
725 v |= addr[3]; v <<= 8;
726 v |= addr[4]; v <<= 8;
727 v |= addr[5]; v <<= 8;
728 v |= addr[6]; v <<= 8;
739 bfd_getl_signed_64 (const void *p ATTRIBUTE_UNUSED)
741 #ifdef BFD_HOST_64_BIT
742 const bfd_byte *addr = (const bfd_byte *) p;
745 v = addr[7]; v <<= 8;
746 v |= addr[6]; v <<= 8;
747 v |= addr[5]; v <<= 8;
748 v |= addr[4]; v <<= 8;
749 v |= addr[3]; v <<= 8;
750 v |= addr[2]; v <<= 8;
751 v |= addr[1]; v <<= 8;
762 bfd_putb32 (bfd_vma data, void *p)
764 bfd_byte *addr = (bfd_byte *) p;
765 addr[0] = (data >> 24) & 0xff;
766 addr[1] = (data >> 16) & 0xff;
767 addr[2] = (data >> 8) & 0xff;
768 addr[3] = data & 0xff;
772 bfd_putl32 (bfd_vma data, void *p)
774 bfd_byte *addr = (bfd_byte *) p;
775 addr[0] = data & 0xff;
776 addr[1] = (data >> 8) & 0xff;
777 addr[2] = (data >> 16) & 0xff;
778 addr[3] = (data >> 24) & 0xff;
782 bfd_putb64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED)
784 #ifdef BFD_HOST_64_BIT
785 bfd_byte *addr = (bfd_byte *) p;
786 addr[0] = (data >> (7*8)) & 0xff;
787 addr[1] = (data >> (6*8)) & 0xff;
788 addr[2] = (data >> (5*8)) & 0xff;
789 addr[3] = (data >> (4*8)) & 0xff;
790 addr[4] = (data >> (3*8)) & 0xff;
791 addr[5] = (data >> (2*8)) & 0xff;
792 addr[6] = (data >> (1*8)) & 0xff;
793 addr[7] = (data >> (0*8)) & 0xff;
800 bfd_putl64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED)
802 #ifdef BFD_HOST_64_BIT
803 bfd_byte *addr = (bfd_byte *) p;
804 addr[7] = (data >> (7*8)) & 0xff;
805 addr[6] = (data >> (6*8)) & 0xff;
806 addr[5] = (data >> (5*8)) & 0xff;
807 addr[4] = (data >> (4*8)) & 0xff;
808 addr[3] = (data >> (3*8)) & 0xff;
809 addr[2] = (data >> (2*8)) & 0xff;
810 addr[1] = (data >> (1*8)) & 0xff;
811 addr[0] = (data >> (0*8)) & 0xff;
818 bfd_put_bits (bfd_uint64_t data, void *p, int bits, bfd_boolean big_p)
820 bfd_byte *addr = (bfd_byte *) p;
828 for (i = 0; i < bytes; i++)
830 int addr_index = big_p ? bytes - i - 1 : i;
832 addr[addr_index] = data & 0xff;
838 bfd_get_bits (const void *p, int bits, bfd_boolean big_p)
840 const bfd_byte *addr = (const bfd_byte *) p;
850 for (i = 0; i < bytes; i++)
852 int addr_index = big_p ? i : bytes - i - 1;
854 data = (data << 8) | addr[addr_index];
860 /* Default implementation */
863 _bfd_generic_get_section_contents (bfd *abfd,
873 if (section->compress_status != COMPRESS_SECTION_NONE)
876 /* xgettext:c-format */
877 (_("%pB: unable to get decompressed section %pA"),
879 bfd_set_error (bfd_error_invalid_operation);
883 /* We do allow reading of a section after bfd_final_link has
884 written the contents out to disk. In that situation, rawsize is
885 just a stale version of size, so ignore it. Otherwise we must be
886 reading an input section, where rawsize, if different to size,
887 is the on-disk size. */
888 if (abfd->direction != write_direction && section->rawsize != 0)
889 sz = section->rawsize;
892 if (offset + count < count
893 || offset + count > sz
894 || (abfd->my_archive != NULL
895 && !bfd_is_thin_archive (abfd->my_archive)
896 && ((ufile_ptr) section->filepos + offset + count
897 > arelt_size (abfd))))
899 bfd_set_error (bfd_error_invalid_operation);
903 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
904 || bfd_bread (location, count, abfd) != count)
911 _bfd_generic_get_section_contents_in_window
912 (bfd *abfd ATTRIBUTE_UNUSED,
913 sec_ptr section ATTRIBUTE_UNUSED,
914 bfd_window *w ATTRIBUTE_UNUSED,
915 file_ptr offset ATTRIBUTE_UNUSED,
916 bfd_size_type count ATTRIBUTE_UNUSED)
923 if (abfd->xvec->_bfd_get_section_contents
924 != _bfd_generic_get_section_contents)
926 /* We don't know what changes the bfd's get_section_contents
927 method may have to make. So punt trying to map the file
928 window, and let get_section_contents do its thing. */
929 /* @@ FIXME : If the internal window has a refcount of 1 and was
930 allocated with malloc instead of mmap, just reuse it. */
932 w->i = bfd_zmalloc (sizeof (bfd_window_internal));
935 w->i->data = bfd_malloc (count);
936 if (w->i->data == NULL)
944 w->size = w->i->size = count;
945 w->data = w->i->data;
946 return bfd_get_section_contents (abfd, section, w->data, offset, count);
948 if (abfd->direction != write_direction && section->rawsize != 0)
949 sz = section->rawsize;
952 if (offset + count < count
953 || offset + count > sz
954 || (abfd->my_archive != NULL
955 && !bfd_is_thin_archive (abfd->my_archive)
956 && ((ufile_ptr) section->filepos + offset + count
957 > arelt_size (abfd)))
958 || ! bfd_get_file_window (abfd, section->filepos + offset, count, w,
967 /* This generic function can only be used in implementations where creating
968 NEW sections is disallowed. It is useful in patching existing sections
969 in read-write files, though. See other set_section_contents functions
970 to see why it doesn't work for new sections. */
972 _bfd_generic_set_section_contents (bfd *abfd,
974 const void *location,
981 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
982 || bfd_bwrite (location, count, abfd) != count)
993 unsigned int bfd_log2 (bfd_vma x);
996 Return the log base 2 of the value supplied, rounded up. E.g., an
997 @var{x} of 1025 returns 11. A @var{x} of 0 returns 0.
1001 bfd_log2 (bfd_vma x)
1003 unsigned int result = 0;
1010 while ((x >>= 1) != 0);
1015 bfd_generic_is_local_label_name (bfd *abfd, const char *name)
1017 char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
1019 return name[0] == locals_prefix;
1022 /* Give a warning at runtime if someone compiles code which calls
1026 _bfd_warn_deprecated (const char *what,
1031 /* Poor man's tracking of functions we've already warned about. */
1032 static size_t mask = 0;
1034 if (~(size_t) func & ~mask)
1037 /* Note: separate sentences in order to allow
1038 for translation into other languages. */
1040 /* xgettext:c-format */
1041 fprintf (stderr, _("Deprecated %s called at %s line %d in %s\n"),
1042 what, file, line, func);
1044 fprintf (stderr, _("Deprecated %s called\n"), what);
1046 mask |= ~(size_t) func;
1050 /* Helper function for reading uleb128 encoded data. */
1053 _bfd_read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1055 unsigned int *bytes_read_ptr)
1058 unsigned int num_read;
1067 byte = bfd_get_8 (abfd, buf);
1070 result |= (((bfd_vma) byte & 0x7f) << shift);
1073 while (byte & 0x80);
1074 *bytes_read_ptr = num_read;
1078 /* Read in a LEB128 encoded value from ABFD starting at DATA.
1079 If SIGN is true, return a signed LEB128 value.
1080 If LENGTH_RETURN is not NULL, return in it the number of bytes read.
1081 No bytes will be read at address END or beyond. */
1084 _bfd_safe_read_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1086 unsigned int *length_return,
1088 const bfd_byte * const end)
1091 unsigned int num_read = 0;
1092 unsigned int shift = 0;
1093 unsigned char byte = 0;
1097 byte = bfd_get_8 (abfd, data);
1101 result |= ((bfd_vma) (byte & 0x7f)) << shift;
1104 if ((byte & 0x80) == 0)
1108 if (length_return != NULL)
1109 *length_return = num_read;
1111 if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40))
1112 result |= -((bfd_vma) 1 << shift);
1117 /* Helper function for reading sleb128 encoded data. */
1120 _bfd_read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1122 unsigned int *bytes_read_ptr)
1126 unsigned int num_read;
1134 byte = bfd_get_8 (abfd, buf);
1137 result |= (((bfd_vma) byte & 0x7f) << shift);
1140 while (byte & 0x80);
1141 if (shift < 8 * sizeof (result) && (byte & 0x40))
1142 result |= (((bfd_vma) -1) << shift);
1143 *bytes_read_ptr = num_read;
1148 _bfd_generic_init_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
1149 asection *isec ATTRIBUTE_UNUSED,
1150 bfd *obfd ATTRIBUTE_UNUSED,
1151 asection *osec ATTRIBUTE_UNUSED,
1152 struct bfd_link_info *link_info ATTRIBUTE_UNUSED)