1 /* Assorted BFD support routines, only used internally.
2 Copyright (C) 1990-2017 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
43 /* A routine which is used in target vectors for unsupported
47 bfd_false (bfd *ignore ATTRIBUTE_UNUSED)
49 bfd_set_error (bfd_error_invalid_operation);
53 /* A routine which is used in target vectors for supported operations
54 which do not actually do anything. */
57 bfd_true (bfd *ignore ATTRIBUTE_UNUSED)
62 /* A routine which is used in target vectors for unsupported
63 operations which return a pointer value. */
66 bfd_nullvoidptr (bfd *ignore ATTRIBUTE_UNUSED)
68 bfd_set_error (bfd_error_invalid_operation);
73 bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
79 bfd_0u (bfd *ignore ATTRIBUTE_UNUSED)
85 bfd_0l (bfd *ignore ATTRIBUTE_UNUSED)
90 /* A routine which is used in target vectors for unsupported
91 operations which return -1 on error. */
94 _bfd_n1 (bfd *ignore_abfd ATTRIBUTE_UNUSED)
96 bfd_set_error (bfd_error_invalid_operation);
101 bfd_void (bfd *ignore ATTRIBUTE_UNUSED)
106 _bfd_norelocs_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
107 asection *sec ATTRIBUTE_UNUSED)
109 return sizeof (arelent *);
113 _bfd_norelocs_canonicalize_reloc (bfd *abfd ATTRIBUTE_UNUSED,
114 asection *sec ATTRIBUTE_UNUSED,
116 asymbol **symbols ATTRIBUTE_UNUSED)
123 _bfd_norelocs_set_reloc (bfd *abfd ATTRIBUTE_UNUSED,
124 asection *sec ATTRIBUTE_UNUSED,
125 arelent **relptr ATTRIBUTE_UNUSED,
126 unsigned int count ATTRIBUTE_UNUSED)
132 _bfd_nocore_core_file_matches_executable_p
133 (bfd *ignore_core_bfd ATTRIBUTE_UNUSED,
134 bfd *ignore_exec_bfd ATTRIBUTE_UNUSED)
136 bfd_set_error (bfd_error_invalid_operation);
140 /* Routine to handle core_file_failing_command entry point for targets
141 without core file support. */
144 _bfd_nocore_core_file_failing_command (bfd *ignore_abfd ATTRIBUTE_UNUSED)
146 bfd_set_error (bfd_error_invalid_operation);
150 /* Routine to handle core_file_failing_signal entry point for targets
151 without core file support. */
154 _bfd_nocore_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED)
156 bfd_set_error (bfd_error_invalid_operation);
160 /* Routine to handle the core_file_pid entry point for targets without
161 core file support. */
164 _bfd_nocore_core_file_pid (bfd *ignore_abfd ATTRIBUTE_UNUSED)
166 bfd_set_error (bfd_error_invalid_operation);
171 _bfd_dummy_target (bfd *ignore_abfd ATTRIBUTE_UNUSED)
173 bfd_set_error (bfd_error_wrong_format);
177 /* Allocate memory using malloc. */
180 bfd_malloc (bfd_size_type size)
183 size_t sz = (size_t) size;
186 /* This is to pacify memory checkers like valgrind. */
187 || ((signed long) sz) < 0)
189 bfd_set_error (bfd_error_no_memory);
194 if (ptr == NULL && sz != 0)
195 bfd_set_error (bfd_error_no_memory);
200 /* Allocate memory using malloc, nmemb * size with overflow checking. */
203 bfd_malloc2 (bfd_size_type nmemb, bfd_size_type size)
205 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
207 && nmemb > ~(bfd_size_type) 0 / size)
209 bfd_set_error (bfd_error_no_memory);
213 return bfd_malloc (size * nmemb);
216 /* Reallocate memory using realloc. */
219 bfd_realloc (void *ptr, bfd_size_type size)
222 size_t sz = (size_t) size;
225 return bfd_malloc (size);
228 /* This is to pacify memory checkers like valgrind. */
229 || ((signed long) sz) < 0)
231 bfd_set_error (bfd_error_no_memory);
235 ret = realloc (ptr, sz);
237 if (ret == NULL && sz != 0)
238 bfd_set_error (bfd_error_no_memory);
243 /* Reallocate memory using realloc, nmemb * size with overflow checking. */
246 bfd_realloc2 (void *ptr, bfd_size_type nmemb, bfd_size_type size)
248 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
250 && nmemb > ~(bfd_size_type) 0 / size)
252 bfd_set_error (bfd_error_no_memory);
256 return bfd_realloc (ptr, size * nmemb);
259 /* Reallocate memory using realloc.
260 If this fails the pointer is freed before returning. */
263 bfd_realloc_or_free (void *ptr, bfd_size_type size)
265 void *ret = bfd_realloc (ptr, size);
267 if (ret == NULL && ptr != NULL)
273 /* Allocate memory using malloc and clear it. */
276 bfd_zmalloc (bfd_size_type size)
278 void *ptr = bfd_malloc (size);
280 if (ptr != NULL && size > 0)
281 memset (ptr, 0, (size_t) size);
286 /* Allocate memory using malloc (nmemb * size) with overflow checking
290 bfd_zmalloc2 (bfd_size_type nmemb, bfd_size_type size)
292 void *ptr = bfd_malloc2 (nmemb, size);
296 size_t sz = nmemb * size;
307 bfd_write_bigendian_4byte_int
310 bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int);
313 Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
314 endian order regardless of what else is going on. This is useful in
319 bfd_write_bigendian_4byte_int (bfd *abfd, unsigned int i)
322 bfd_putb32 ((bfd_vma) i, buffer);
323 return bfd_bwrite (buffer, (bfd_size_type) 4, abfd) == 4;
327 /** The do-it-yourself (byte) sex-change kit */
329 /* The middle letter e.g. get<b>short indicates Big or Little endian
330 target machine. It doesn't matter what the byte order of the host
331 machine is; these routines work for either. */
333 /* FIXME: Should these take a count argument?
334 Answer (gnu@cygnus.com): No, but perhaps they should be inline
335 functions in swap.h #ifdef __GNUC__.
336 Gprof them later and find out. */
345 These macros as used for reading and writing raw data in
346 sections; each access (except for bytes) is vectored through
347 the target format of the BFD and mangled accordingly. The
348 mangling performs any necessary endian translations and
349 removes alignment restrictions. Note that types accepted and
350 returned by these macros are identical so they can be swapped
351 around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
352 to either <<bfd_get_32>> or <<bfd_get_64>>.
354 In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a
355 system without prototypes, the caller is responsible for making
356 sure that is true, with a cast if necessary. We don't cast
357 them in the macro definitions because that would prevent <<lint>>
358 or <<gcc -Wall>> from detecting sins such as passing a pointer.
359 To detect calling these with less than a <<bfd_vma>>, use
360 <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
363 .{* Byte swapping macros for user section data. *}
365 .#define bfd_put_8(abfd, val, ptr) \
366 . ((void) (*((unsigned char *) (ptr)) = (val) & 0xff))
367 .#define bfd_put_signed_8 \
369 .#define bfd_get_8(abfd, ptr) \
370 . (*(const unsigned char *) (ptr) & 0xff)
371 .#define bfd_get_signed_8(abfd, ptr) \
372 . (((*(const unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80)
374 .#define bfd_put_16(abfd, val, ptr) \
375 . BFD_SEND (abfd, bfd_putx16, ((val),(ptr)))
376 .#define bfd_put_signed_16 \
378 .#define bfd_get_16(abfd, ptr) \
379 . BFD_SEND (abfd, bfd_getx16, (ptr))
380 .#define bfd_get_signed_16(abfd, ptr) \
381 . BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
383 .#define bfd_put_32(abfd, val, ptr) \
384 . BFD_SEND (abfd, bfd_putx32, ((val),(ptr)))
385 .#define bfd_put_signed_32 \
387 .#define bfd_get_32(abfd, ptr) \
388 . BFD_SEND (abfd, bfd_getx32, (ptr))
389 .#define bfd_get_signed_32(abfd, ptr) \
390 . BFD_SEND (abfd, bfd_getx_signed_32, (ptr))
392 .#define bfd_put_64(abfd, val, ptr) \
393 . BFD_SEND (abfd, bfd_putx64, ((val), (ptr)))
394 .#define bfd_put_signed_64 \
396 .#define bfd_get_64(abfd, ptr) \
397 . BFD_SEND (abfd, bfd_getx64, (ptr))
398 .#define bfd_get_signed_64(abfd, ptr) \
399 . BFD_SEND (abfd, bfd_getx_signed_64, (ptr))
401 .#define bfd_get(bits, abfd, ptr) \
402 . ((bits) == 8 ? (bfd_vma) bfd_get_8 (abfd, ptr) \
403 . : (bits) == 16 ? bfd_get_16 (abfd, ptr) \
404 . : (bits) == 32 ? bfd_get_32 (abfd, ptr) \
405 . : (bits) == 64 ? bfd_get_64 (abfd, ptr) \
406 . : (abort (), (bfd_vma) - 1))
408 .#define bfd_put(bits, abfd, val, ptr) \
409 . ((bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
410 . : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
411 . : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
412 . : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
413 . : (abort (), (void) 0))
423 These macros have the same function as their <<bfd_get_x>>
424 brethren, except that they are used for removing information
425 for the header records of object files. Believe it or not,
426 some object files keep their header records in big endian
427 order and their data in little endian order.
429 .{* Byte swapping macros for file header data. *}
431 .#define bfd_h_put_8(abfd, val, ptr) \
432 . bfd_put_8 (abfd, val, ptr)
433 .#define bfd_h_put_signed_8(abfd, val, ptr) \
434 . bfd_put_8 (abfd, val, ptr)
435 .#define bfd_h_get_8(abfd, ptr) \
436 . bfd_get_8 (abfd, ptr)
437 .#define bfd_h_get_signed_8(abfd, ptr) \
438 . bfd_get_signed_8 (abfd, ptr)
440 .#define bfd_h_put_16(abfd, val, ptr) \
441 . BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
442 .#define bfd_h_put_signed_16 \
444 .#define bfd_h_get_16(abfd, ptr) \
445 . BFD_SEND (abfd, bfd_h_getx16, (ptr))
446 .#define bfd_h_get_signed_16(abfd, ptr) \
447 . BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
449 .#define bfd_h_put_32(abfd, val, ptr) \
450 . BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
451 .#define bfd_h_put_signed_32 \
453 .#define bfd_h_get_32(abfd, ptr) \
454 . BFD_SEND (abfd, bfd_h_getx32, (ptr))
455 .#define bfd_h_get_signed_32(abfd, ptr) \
456 . BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
458 .#define bfd_h_put_64(abfd, val, ptr) \
459 . BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
460 .#define bfd_h_put_signed_64 \
462 .#define bfd_h_get_64(abfd, ptr) \
463 . BFD_SEND (abfd, bfd_h_getx64, (ptr))
464 .#define bfd_h_get_signed_64(abfd, ptr) \
465 . BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
467 .{* Aliases for the above, which should eventually go away. *}
469 .#define H_PUT_64 bfd_h_put_64
470 .#define H_PUT_32 bfd_h_put_32
471 .#define H_PUT_16 bfd_h_put_16
472 .#define H_PUT_8 bfd_h_put_8
473 .#define H_PUT_S64 bfd_h_put_signed_64
474 .#define H_PUT_S32 bfd_h_put_signed_32
475 .#define H_PUT_S16 bfd_h_put_signed_16
476 .#define H_PUT_S8 bfd_h_put_signed_8
477 .#define H_GET_64 bfd_h_get_64
478 .#define H_GET_32 bfd_h_get_32
479 .#define H_GET_16 bfd_h_get_16
480 .#define H_GET_8 bfd_h_get_8
481 .#define H_GET_S64 bfd_h_get_signed_64
482 .#define H_GET_S32 bfd_h_get_signed_32
483 .#define H_GET_S16 bfd_h_get_signed_16
484 .#define H_GET_S8 bfd_h_get_signed_8
488 /* Sign extension to bfd_signed_vma. */
489 #define COERCE16(x) (((bfd_vma) (x) ^ 0x8000) - 0x8000)
490 #define COERCE32(x) (((bfd_vma) (x) ^ 0x80000000) - 0x80000000)
491 #define COERCE64(x) \
492 (((bfd_uint64_t) (x) ^ ((bfd_uint64_t) 1 << 63)) - ((bfd_uint64_t) 1 << 63))
495 bfd_getb16 (const void *p)
497 const bfd_byte *addr = (const bfd_byte *) p;
498 return (addr[0] << 8) | addr[1];
502 bfd_getl16 (const void *p)
504 const bfd_byte *addr = (const bfd_byte *) p;
505 return (addr[1] << 8) | addr[0];
509 bfd_getb_signed_16 (const void *p)
511 const bfd_byte *addr = (const bfd_byte *) p;
512 return COERCE16 ((addr[0] << 8) | addr[1]);
516 bfd_getl_signed_16 (const void *p)
518 const bfd_byte *addr = (const bfd_byte *) p;
519 return COERCE16 ((addr[1] << 8) | addr[0]);
523 bfd_putb16 (bfd_vma data, void *p)
525 bfd_byte *addr = (bfd_byte *) p;
526 addr[0] = (data >> 8) & 0xff;
527 addr[1] = data & 0xff;
531 bfd_putl16 (bfd_vma data, void *p)
533 bfd_byte *addr = (bfd_byte *) p;
534 addr[0] = data & 0xff;
535 addr[1] = (data >> 8) & 0xff;
539 bfd_getb32 (const void *p)
541 const bfd_byte *addr = (const bfd_byte *) p;
544 v = (unsigned long) addr[0] << 24;
545 v |= (unsigned long) addr[1] << 16;
546 v |= (unsigned long) addr[2] << 8;
547 v |= (unsigned long) addr[3];
552 bfd_getl32 (const void *p)
554 const bfd_byte *addr = (const bfd_byte *) p;
557 v = (unsigned long) addr[0];
558 v |= (unsigned long) addr[1] << 8;
559 v |= (unsigned long) addr[2] << 16;
560 v |= (unsigned long) addr[3] << 24;
565 bfd_getb_signed_32 (const void *p)
567 const bfd_byte *addr = (const bfd_byte *) p;
570 v = (unsigned long) addr[0] << 24;
571 v |= (unsigned long) addr[1] << 16;
572 v |= (unsigned long) addr[2] << 8;
573 v |= (unsigned long) addr[3];
578 bfd_getl_signed_32 (const void *p)
580 const bfd_byte *addr = (const bfd_byte *) p;
583 v = (unsigned long) addr[0];
584 v |= (unsigned long) addr[1] << 8;
585 v |= (unsigned long) addr[2] << 16;
586 v |= (unsigned long) addr[3] << 24;
591 bfd_getb64 (const void *p ATTRIBUTE_UNUSED)
593 #ifdef BFD_HOST_64_BIT
594 const bfd_byte *addr = (const bfd_byte *) p;
597 v = addr[0]; v <<= 8;
598 v |= addr[1]; v <<= 8;
599 v |= addr[2]; v <<= 8;
600 v |= addr[3]; v <<= 8;
601 v |= addr[4]; v <<= 8;
602 v |= addr[5]; v <<= 8;
603 v |= addr[6]; v <<= 8;
614 bfd_getl64 (const void *p ATTRIBUTE_UNUSED)
616 #ifdef BFD_HOST_64_BIT
617 const bfd_byte *addr = (const bfd_byte *) p;
620 v = addr[7]; v <<= 8;
621 v |= addr[6]; v <<= 8;
622 v |= addr[5]; v <<= 8;
623 v |= addr[4]; v <<= 8;
624 v |= addr[3]; v <<= 8;
625 v |= addr[2]; v <<= 8;
626 v |= addr[1]; v <<= 8;
638 bfd_getb_signed_64 (const void *p ATTRIBUTE_UNUSED)
640 #ifdef BFD_HOST_64_BIT
641 const bfd_byte *addr = (const bfd_byte *) p;
644 v = addr[0]; v <<= 8;
645 v |= addr[1]; v <<= 8;
646 v |= addr[2]; v <<= 8;
647 v |= addr[3]; v <<= 8;
648 v |= addr[4]; v <<= 8;
649 v |= addr[5]; v <<= 8;
650 v |= addr[6]; v <<= 8;
661 bfd_getl_signed_64 (const void *p ATTRIBUTE_UNUSED)
663 #ifdef BFD_HOST_64_BIT
664 const bfd_byte *addr = (const bfd_byte *) p;
667 v = addr[7]; v <<= 8;
668 v |= addr[6]; v <<= 8;
669 v |= addr[5]; v <<= 8;
670 v |= addr[4]; v <<= 8;
671 v |= addr[3]; v <<= 8;
672 v |= addr[2]; v <<= 8;
673 v |= addr[1]; v <<= 8;
684 bfd_putb32 (bfd_vma data, void *p)
686 bfd_byte *addr = (bfd_byte *) p;
687 addr[0] = (data >> 24) & 0xff;
688 addr[1] = (data >> 16) & 0xff;
689 addr[2] = (data >> 8) & 0xff;
690 addr[3] = data & 0xff;
694 bfd_putl32 (bfd_vma data, void *p)
696 bfd_byte *addr = (bfd_byte *) p;
697 addr[0] = data & 0xff;
698 addr[1] = (data >> 8) & 0xff;
699 addr[2] = (data >> 16) & 0xff;
700 addr[3] = (data >> 24) & 0xff;
704 bfd_putb64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED)
706 #ifdef BFD_HOST_64_BIT
707 bfd_byte *addr = (bfd_byte *) p;
708 addr[0] = (data >> (7*8)) & 0xff;
709 addr[1] = (data >> (6*8)) & 0xff;
710 addr[2] = (data >> (5*8)) & 0xff;
711 addr[3] = (data >> (4*8)) & 0xff;
712 addr[4] = (data >> (3*8)) & 0xff;
713 addr[5] = (data >> (2*8)) & 0xff;
714 addr[6] = (data >> (1*8)) & 0xff;
715 addr[7] = (data >> (0*8)) & 0xff;
722 bfd_putl64 (bfd_uint64_t data ATTRIBUTE_UNUSED, void *p ATTRIBUTE_UNUSED)
724 #ifdef BFD_HOST_64_BIT
725 bfd_byte *addr = (bfd_byte *) p;
726 addr[7] = (data >> (7*8)) & 0xff;
727 addr[6] = (data >> (6*8)) & 0xff;
728 addr[5] = (data >> (5*8)) & 0xff;
729 addr[4] = (data >> (4*8)) & 0xff;
730 addr[3] = (data >> (3*8)) & 0xff;
731 addr[2] = (data >> (2*8)) & 0xff;
732 addr[1] = (data >> (1*8)) & 0xff;
733 addr[0] = (data >> (0*8)) & 0xff;
740 bfd_put_bits (bfd_uint64_t data, void *p, int bits, bfd_boolean big_p)
742 bfd_byte *addr = (bfd_byte *) p;
750 for (i = 0; i < bytes; i++)
752 int addr_index = big_p ? bytes - i - 1 : i;
754 addr[addr_index] = data & 0xff;
760 bfd_get_bits (const void *p, int bits, bfd_boolean big_p)
762 const bfd_byte *addr = (const bfd_byte *) p;
772 for (i = 0; i < bytes; i++)
774 int addr_index = big_p ? i : bytes - i - 1;
776 data = (data << 8) | addr[addr_index];
782 /* Default implementation */
785 _bfd_generic_get_section_contents (bfd *abfd,
796 if (section->compress_status != COMPRESS_SECTION_NONE)
799 /* xgettext:c-format */
800 (_("%B: unable to get decompressed section %A"),
802 bfd_set_error (bfd_error_invalid_operation);
806 /* We do allow reading of a section after bfd_final_link has
807 written the contents out to disk. In that situation, rawsize is
808 just a stale version of size, so ignore it. Otherwise we must be
809 reading an input section, where rawsize, if different to size,
810 is the on-disk size. */
811 if (abfd->direction != write_direction && section->rawsize != 0)
812 sz = section->rawsize;
815 filesz = bfd_get_file_size (abfd);
818 /* This should never happen. */
821 if (offset + count < count
822 || offset + count > sz
823 || (section->filepos + offset + count) > (bfd_size_type) filesz)
825 bfd_set_error (bfd_error_invalid_operation);
829 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
830 || bfd_bread (location, count, abfd) != count)
837 _bfd_generic_get_section_contents_in_window
838 (bfd *abfd ATTRIBUTE_UNUSED,
839 sec_ptr section ATTRIBUTE_UNUSED,
840 bfd_window *w ATTRIBUTE_UNUSED,
841 file_ptr offset ATTRIBUTE_UNUSED,
842 bfd_size_type count ATTRIBUTE_UNUSED)
850 if (abfd->xvec->_bfd_get_section_contents
851 != _bfd_generic_get_section_contents)
853 /* We don't know what changes the bfd's get_section_contents
854 method may have to make. So punt trying to map the file
855 window, and let get_section_contents do its thing. */
856 /* @@ FIXME : If the internal window has a refcount of 1 and was
857 allocated with malloc instead of mmap, just reuse it. */
859 w->i = bfd_zmalloc (sizeof (bfd_window_internal));
862 w->i->data = bfd_malloc (count);
863 if (w->i->data == NULL)
871 w->size = w->i->size = count;
872 w->data = w->i->data;
873 return bfd_get_section_contents (abfd, section, w->data, offset, count);
875 if (abfd->direction != write_direction && section->rawsize != 0)
876 sz = section->rawsize;
879 filesz = bfd_get_file_size (abfd);
882 /* This should never happen. */
885 if (offset + count > sz
886 || (section->filepos + offset + sz) > (bfd_size_type) filesz
887 || ! bfd_get_file_window (abfd, section->filepos + offset, count, w,
896 /* This generic function can only be used in implementations where creating
897 NEW sections is disallowed. It is useful in patching existing sections
898 in read-write files, though. See other set_section_contents functions
899 to see why it doesn't work for new sections. */
901 _bfd_generic_set_section_contents (bfd *abfd,
903 const void *location,
910 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
911 || bfd_bwrite (location, count, abfd) != count)
922 unsigned int bfd_log2 (bfd_vma x);
925 Return the log base 2 of the value supplied, rounded up. E.g., an
926 @var{x} of 1025 returns 11. A @var{x} of 0 returns 0.
932 unsigned int result = 0;
939 while ((x >>= 1) != 0);
944 bfd_generic_is_local_label_name (bfd *abfd, const char *name)
946 char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
948 return name[0] == locals_prefix;
951 /* Give a warning at runtime if someone compiles code which calls
955 _bfd_warn_deprecated (const char *what,
960 /* Poor man's tracking of functions we've already warned about. */
961 static size_t mask = 0;
963 if (~(size_t) func & ~mask)
966 /* Note: separate sentences in order to allow
967 for translation into other languages. */
969 /* xgettext:c-format */
970 fprintf (stderr, _("Deprecated %s called at %s line %d in %s\n"),
971 what, file, line, func);
973 fprintf (stderr, _("Deprecated %s called\n"), what);
975 mask |= ~(size_t) func;
979 /* Helper function for reading uleb128 encoded data. */
982 _bfd_read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
984 unsigned int *bytes_read_ptr)
987 unsigned int num_read;
996 byte = bfd_get_8 (abfd, buf);
999 result |= (((bfd_vma) byte & 0x7f) << shift);
1002 while (byte & 0x80);
1003 *bytes_read_ptr = num_read;
1007 /* Read in a LEB128 encoded value from ABFD starting at DATA.
1008 If SIGN is true, return a signed LEB128 value.
1009 If LENGTH_RETURN is not NULL, return in it the number of bytes read.
1010 No bytes will be read at address END or beyond. */
1013 _bfd_safe_read_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1015 unsigned int *length_return,
1017 const bfd_byte * const end)
1020 unsigned int num_read = 0;
1021 unsigned int shift = 0;
1022 unsigned char byte = 0;
1026 byte = bfd_get_8 (abfd, data);
1030 result |= ((bfd_vma) (byte & 0x7f)) << shift;
1033 if ((byte & 0x80) == 0)
1037 if (length_return != NULL)
1038 *length_return = num_read;
1040 if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40))
1041 result |= -((bfd_vma) 1 << shift);
1046 /* Helper function for reading sleb128 encoded data. */
1049 _bfd_read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
1051 unsigned int *bytes_read_ptr)
1055 unsigned int num_read;
1063 byte = bfd_get_8 (abfd, buf);
1066 result |= (((bfd_vma) byte & 0x7f) << shift);
1069 while (byte & 0x80);
1070 if (shift < 8 * sizeof (result) && (byte & 0x40))
1071 result |= (((bfd_vma) -1) << shift);
1072 *bytes_read_ptr = num_read;
1077 _bfd_generic_init_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
1078 asection *isec ATTRIBUTE_UNUSED,
1079 bfd *obfd ATTRIBUTE_UNUSED,
1080 asection *osec ATTRIBUTE_UNUSED,
1081 struct bfd_link_info *link_info ATTRIBUTE_UNUSED)