ea8c7ac7d0
This is a greatly pared down version of the full gdb-4.12, all the config stuff has been removed and the supporting libraries have been stripped to a minimum. This is a 1.1.5 only port, I'll do a more complete port for 2.0 which will have all the config stuff and will install the gnu support libraries as system libraries like we do for readline. There wasn't much point for 1.1.5 since only gdb would use them so I went for saving space instead. For 2.0 I'll config all the other gnu tools to use them as well.
851 lines
20 KiB
C
851 lines
20 KiB
C
/* Assorted BFD support routines, only used internally.
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Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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/*
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SECTION
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libbfd
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DESCRIPTION
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This file contains various routines which are used within BFD.
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They are not intended for export, but are documented here for
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completeness.
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*/
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boolean
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DEFUN(_bfd_dummy_new_section_hook,(ignore, ignore_newsect),
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bfd *ignore AND
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asection *ignore_newsect)
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{
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return true;
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}
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boolean
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DEFUN(bfd_false ,(ignore),
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bfd *ignore)
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{
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return false;
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}
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boolean
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DEFUN(bfd_true,(ignore),
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bfd *ignore)
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{
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return true;
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}
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PTR
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DEFUN(bfd_nullvoidptr,(ignore),
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bfd *ignore)
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{
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return (PTR)NULL;
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}
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int
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DEFUN(bfd_0,(ignore),
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bfd *ignore)
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{
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return 0;
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}
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unsigned int
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DEFUN(bfd_0u,(ignore),
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bfd *ignore)
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{
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return 0;
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}
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void
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DEFUN(bfd_void,(ignore),
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bfd *ignore)
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{
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}
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boolean
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DEFUN(_bfd_dummy_core_file_matches_executable_p,(ignore_core_bfd, ignore_exec_bfd),
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bfd *ignore_core_bfd AND
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bfd *ignore_exec_bfd)
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{
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bfd_error = invalid_operation;
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return false;
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}
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/* of course you can't initialize a function to be the same as another, grr */
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char *
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DEFUN(_bfd_dummy_core_file_failing_command,(ignore_abfd),
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bfd *ignore_abfd)
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{
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return (char *)NULL;
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}
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int
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DEFUN(_bfd_dummy_core_file_failing_signal,(ignore_abfd),
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bfd *ignore_abfd)
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{
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return 0;
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}
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bfd_target *
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DEFUN(_bfd_dummy_target,(ignore_abfd),
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bfd *ignore_abfd)
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{
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return 0;
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}
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/** zalloc -- allocate and clear storage */
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#ifndef zalloc
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char *
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DEFUN(zalloc,(size),
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bfd_size_type size)
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{
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char *ptr = (char *) malloc ((size_t)size);
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if ((ptr != NULL) && (size != 0))
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memset(ptr,0, (size_t) size);
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return ptr;
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}
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#endif
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/*
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INTERNAL_FUNCTION
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bfd_xmalloc
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SYNOPSIS
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PTR bfd_xmalloc( bfd_size_type size);
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DESCRIPTION
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Like malloc, but exit if no more memory.
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*/
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/** There is major inconsistency in how running out of memory is handled.
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Some routines return a NULL, and set bfd_error to no_memory.
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However, obstack routines can't do this ... */
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DEFUN(PTR bfd_xmalloc,(size),
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bfd_size_type size)
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{
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static CONST char no_memory_message[] = "Virtual memory exhausted!\n";
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PTR ptr;
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if (size == 0) size = 1;
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ptr = (PTR)malloc((size_t) size);
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if (!ptr)
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{
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write (2, no_memory_message, sizeof(no_memory_message)-1);
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exit (-1);
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}
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return ptr;
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}
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/*
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INTERNAL_FUNCTION
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bfd_xmalloc_by_size_t
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SYNOPSIS
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PTR bfd_xmalloc_by_size_t ( size_t size);
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DESCRIPTION
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Like malloc, but exit if no more memory.
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Uses size_t, so it's suitable for use as obstack_chunk_alloc.
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*/
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PTR
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DEFUN(bfd_xmalloc_by_size_t, (size),
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size_t size)
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{
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return bfd_xmalloc ((bfd_size_type) size);
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}
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/* Some IO code */
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/* Note that archive entries don't have streams; they share their parent's.
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This allows someone to play with the iostream behind BFD's back.
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Also, note that the origin pointer points to the beginning of a file's
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contents (0 for non-archive elements). For archive entries this is the
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first octet in the file, NOT the beginning of the archive header. */
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static
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int DEFUN(real_read,(where, a,b, file),
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PTR where AND
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int a AND
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int b AND
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FILE *file)
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{
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return fread(where, a,b,file);
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}
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bfd_size_type
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DEFUN(bfd_read,(ptr, size, nitems, abfd),
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PTR ptr AND
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bfd_size_type size AND
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bfd_size_type nitems AND
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bfd *abfd)
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{
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int nread;
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nread = real_read (ptr, 1, (int)(size*nitems), bfd_cache_lookup(abfd));
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#ifdef FILE_OFFSET_IS_CHAR_INDEX
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if (nread > 0)
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abfd->where += nread;
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#endif
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return nread;
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}
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bfd_size_type
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DEFUN(bfd_write,(ptr, size, nitems, abfd),
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CONST PTR ptr AND
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bfd_size_type size AND
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bfd_size_type nitems AND
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bfd *abfd)
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{
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int nwrote = fwrite (ptr, 1, (int)(size*nitems), bfd_cache_lookup(abfd));
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#ifdef FILE_OFFSET_IS_CHAR_INDEX
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if (nwrote > 0)
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abfd->where += nwrote;
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#endif
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return nwrote;
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}
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/*
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INTERNAL_FUNCTION
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bfd_write_bigendian_4byte_int
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SYNOPSIS
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void bfd_write_bigendian_4byte_int(bfd *abfd, int i);
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DESCRIPTION
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Writes a 4 byte integer to the outputing bfd, in big endian
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mode regardless of what else is going on. This is useful in
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archives.
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*/
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void
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DEFUN(bfd_write_bigendian_4byte_int,(abfd, i),
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bfd *abfd AND
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int i)
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{
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bfd_byte buffer[4];
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bfd_putb32(i, buffer);
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bfd_write((PTR)buffer, 4, 1, abfd);
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}
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long
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DEFUN(bfd_tell,(abfd),
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bfd *abfd)
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{
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file_ptr ptr;
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ptr = ftell (bfd_cache_lookup(abfd));
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if (abfd->my_archive)
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ptr -= abfd->origin;
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abfd->where = ptr;
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return ptr;
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}
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int
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DEFUN(bfd_flush,(abfd),
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bfd *abfd)
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{
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return fflush (bfd_cache_lookup(abfd));
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}
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int
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DEFUN(bfd_stat,(abfd, statbuf),
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bfd *abfd AND
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struct stat *statbuf)
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{
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return fstat (fileno(bfd_cache_lookup(abfd)), statbuf);
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}
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int
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DEFUN(bfd_seek,(abfd, position, direction),
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bfd * CONST abfd AND
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CONST file_ptr position AND
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CONST int direction)
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{
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int result;
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FILE *f;
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file_ptr file_position;
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/* For the time being, a BFD may not seek to it's end. The problem
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is that we don't easily have a way to recognize the end of an
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element in an archive. */
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BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
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if (direction == SEEK_CUR && position == 0)
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return 0;
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#ifdef FILE_OFFSET_IS_CHAR_INDEX
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if (abfd->format != bfd_archive && abfd->my_archive == 0)
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{
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#ifndef NDEBUG
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/* Explanation for this code: I'm only about 95+% sure that the above
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conditions are sufficient and that all i/o calls are properly
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adjusting the `where' field. So this is sort of an `assert'
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that the `where' field is correct. If we can go a while without
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tripping the abort, we can probably safely disable this code,
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so that the real optimizations happen. */
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file_ptr where_am_i_now;
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where_am_i_now = ftell (bfd_cache_lookup (abfd));
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if (abfd->my_archive)
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where_am_i_now -= abfd->origin;
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if (where_am_i_now != abfd->where)
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abort ();
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#endif
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if (direction == SEEK_SET && position == abfd->where)
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return 0;
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}
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else
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{
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/* We need something smarter to optimize access to archives.
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Currently, anything inside an archive is read via the file
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handle for the archive. Which means that a bfd_seek on one
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component affects the `current position' in the archive, as
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well as in any other component.
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It might be sufficient to put a spike through the cache
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abstraction, and look to the archive for the file position,
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but I think we should try for something cleaner.
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In the meantime, no optimization for archives. */
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}
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#endif
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f = bfd_cache_lookup (abfd);
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file_position = position;
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if (direction == SEEK_SET && abfd->my_archive != NULL)
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file_position += abfd->origin;
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result = fseek (f, file_position, direction);
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if (result != 0)
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/* Force redetermination of `where' field. */
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bfd_tell (abfd);
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else
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{
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#ifdef FILE_OFFSET_IS_CHAR_INDEX
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/* Adjust `where' field. */
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if (direction == SEEK_SET)
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abfd->where = position;
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else
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abfd->where += position;
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#endif
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}
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return result;
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}
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/** Make a string table */
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/*>bfd.h<
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Add string to table pointed to by table, at location starting with free_ptr.
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resizes the table if necessary (if it's NULL, creates it, ignoring
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table_length). Updates free_ptr, table, table_length */
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boolean
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DEFUN(bfd_add_to_string_table,(table, new_string, table_length, free_ptr),
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char **table AND
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char *new_string AND
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unsigned int *table_length AND
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char **free_ptr)
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{
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size_t string_length = strlen (new_string) + 1; /* include null here */
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char *base = *table;
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size_t space_length = *table_length;
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unsigned int offset = (base ? *free_ptr - base : 0);
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if (base == NULL) {
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/* Avoid a useless regrow if we can (but of course we still
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take it next time */
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space_length = (string_length < DEFAULT_STRING_SPACE_SIZE ?
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DEFAULT_STRING_SPACE_SIZE : string_length+1);
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base = zalloc ((bfd_size_type) space_length);
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if (base == NULL) {
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bfd_error = no_memory;
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return false;
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}
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}
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if ((size_t)(offset + string_length) >= space_length) {
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/* Make sure we will have enough space */
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while ((size_t)(offset + string_length) >= space_length)
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space_length += space_length/2; /* grow by 50% */
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base = (char *) realloc (base, space_length);
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if (base == NULL) {
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bfd_error = no_memory;
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return false;
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}
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}
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memcpy (base + offset, new_string, string_length);
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*table = base;
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*table_length = space_length;
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*free_ptr = base + offset + string_length;
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return true;
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}
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/** The do-it-yourself (byte) sex-change kit */
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/* The middle letter e.g. get<b>short indicates Big or Little endian
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target machine. It doesn't matter what the byte order of the host
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machine is; these routines work for either. */
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/* FIXME: Should these take a count argument?
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Answer (gnu@cygnus.com): No, but perhaps they should be inline
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functions in swap.h #ifdef __GNUC__.
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Gprof them later and find out. */
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/*
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FUNCTION
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bfd_put_size
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FUNCTION
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bfd_get_size
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DESCRIPTION
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These macros as used for reading and writing raw data in
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sections; each access (except for bytes) is vectored through
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the target format of the BFD and mangled accordingly. The
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mangling performs any necessary endian translations and
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removes alignment restrictions. Note that types accepted and
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returned by these macros are identical so they can be swapped
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around in macros--for example libaout.h defines GET_WORD to
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either bfd_get_32 or bfd_get_64.
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In the put routines, val must be a bfd_vma. If we are on a
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system without prototypes, the caller is responsible for making
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sure that is true, with a cast if necessary. We don't cast
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them in the macro definitions because that would prevent lint
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or gcc -Wall from detecting sins such as passing a pointer.
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To detect calling these with less than a bfd_vma, use gcc
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-Wconversion on a host with 64 bit bfd_vma's.
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.
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.{* Byte swapping macros for user section data. *}
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.
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.#define bfd_put_8(abfd, val, ptr) \
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. (*((unsigned char *)(ptr)) = (unsigned char)val)
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.#define bfd_put_signed_8 \
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. bfd_put_8
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.#define bfd_get_8(abfd, ptr) \
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. (*(unsigned char *)(ptr))
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.#define bfd_get_signed_8(abfd, ptr) \
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. ((*(unsigned char *)(ptr) ^ 0x80) - 0x80)
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.
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.#define bfd_put_16(abfd, val, ptr) \
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. BFD_SEND(abfd, bfd_putx16, ((val),(ptr)))
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.#define bfd_put_signed_16 \
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. bfd_put_16
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.#define bfd_get_16(abfd, ptr) \
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. BFD_SEND(abfd, bfd_getx16, (ptr))
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.#define bfd_get_signed_16(abfd, ptr) \
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. BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
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.
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.#define bfd_put_32(abfd, val, ptr) \
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. BFD_SEND(abfd, bfd_putx32, ((val),(ptr)))
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.#define bfd_put_signed_32 \
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. bfd_put_32
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.#define bfd_get_32(abfd, ptr) \
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. BFD_SEND(abfd, bfd_getx32, (ptr))
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.#define bfd_get_signed_32(abfd, ptr) \
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. BFD_SEND(abfd, bfd_getx_signed_32, (ptr))
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.
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.#define bfd_put_64(abfd, val, ptr) \
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. BFD_SEND(abfd, bfd_putx64, ((val), (ptr)))
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.#define bfd_put_signed_64 \
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. bfd_put_64
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.#define bfd_get_64(abfd, ptr) \
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. BFD_SEND(abfd, bfd_getx64, (ptr))
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.#define bfd_get_signed_64(abfd, ptr) \
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. BFD_SEND(abfd, bfd_getx_signed_64, (ptr))
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.
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*/
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/*
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FUNCTION
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bfd_h_put_size
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FUNCTION
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bfd_h_get_size
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DESCRIPTION
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These macros have the same function as their <<bfd_get_x>>
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bretherin, except that they are used for removing information
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for the header records of object files. Believe it or not,
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some object files keep their header records in big endian
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order, and their data in little endian order.
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.
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.{* Byte swapping macros for file header data. *}
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.
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.#define bfd_h_put_8(abfd, val, ptr) \
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. bfd_put_8 (abfd, val, ptr)
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.#define bfd_h_put_signed_8(abfd, val, ptr) \
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. bfd_put_8 (abfd, val, ptr)
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.#define bfd_h_get_8(abfd, ptr) \
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. bfd_get_8 (abfd, ptr)
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.#define bfd_h_get_signed_8(abfd, ptr) \
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. bfd_get_signed_8 (abfd, ptr)
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.
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.#define bfd_h_put_16(abfd, val, ptr) \
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. BFD_SEND(abfd, bfd_h_putx16,(val,ptr))
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.#define bfd_h_put_signed_16 \
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. bfd_h_put_16
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.#define bfd_h_get_16(abfd, ptr) \
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. BFD_SEND(abfd, bfd_h_getx16,(ptr))
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.#define bfd_h_get_signed_16(abfd, ptr) \
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. BFD_SEND(abfd, bfd_h_getx_signed_16, (ptr))
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.
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.#define bfd_h_put_32(abfd, val, ptr) \
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. BFD_SEND(abfd, bfd_h_putx32,(val,ptr))
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.#define bfd_h_put_signed_32 \
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. bfd_h_put_32
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.#define bfd_h_get_32(abfd, ptr) \
|
||
. BFD_SEND(abfd, bfd_h_getx32,(ptr))
|
||
.#define bfd_h_get_signed_32(abfd, ptr) \
|
||
. BFD_SEND(abfd, bfd_h_getx_signed_32, (ptr))
|
||
.
|
||
.#define bfd_h_put_64(abfd, val, ptr) \
|
||
. BFD_SEND(abfd, bfd_h_putx64,(val, ptr))
|
||
.#define bfd_h_put_signed_64 \
|
||
. bfd_h_put_64
|
||
.#define bfd_h_get_64(abfd, ptr) \
|
||
. BFD_SEND(abfd, bfd_h_getx64,(ptr))
|
||
.#define bfd_h_get_signed_64(abfd, ptr) \
|
||
. BFD_SEND(abfd, bfd_h_getx_signed_64, (ptr))
|
||
.
|
||
*/
|
||
|
||
/* Sign extension to bfd_signed_vma. */
|
||
#define COERCE16(x) (((bfd_signed_vma) (x) ^ 0x8000) - 0x8000)
|
||
#define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000)
|
||
#define EIGHT_GAZILLION (((HOST_64_BIT)0x80000000) << 32)
|
||
#define COERCE64(x) \
|
||
(((bfd_signed_vma) (x) ^ EIGHT_GAZILLION) - EIGHT_GAZILLION)
|
||
|
||
bfd_vma
|
||
DEFUN(bfd_getb16,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
return (addr[0] << 8) | addr[1];
|
||
}
|
||
|
||
bfd_vma
|
||
DEFUN(bfd_getl16,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
return (addr[1] << 8) | addr[0];
|
||
}
|
||
|
||
bfd_signed_vma
|
||
DEFUN(bfd_getb_signed_16,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
return COERCE16((addr[0] << 8) | addr[1]);
|
||
}
|
||
|
||
bfd_signed_vma
|
||
DEFUN(bfd_getl_signed_16,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
return COERCE16((addr[1] << 8) | addr[0]);
|
||
}
|
||
|
||
void
|
||
DEFUN(bfd_putb16,(data, addr),
|
||
bfd_vma data AND
|
||
register bfd_byte *addr)
|
||
{
|
||
addr[0] = (bfd_byte)(data >> 8);
|
||
addr[1] = (bfd_byte )data;
|
||
}
|
||
|
||
void
|
||
DEFUN(bfd_putl16,(data, addr),
|
||
bfd_vma data AND
|
||
register bfd_byte *addr)
|
||
{
|
||
addr[0] = (bfd_byte )data;
|
||
addr[1] = (bfd_byte)(data >> 8);
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getb32 (addr)
|
||
register bfd_byte *addr;
|
||
{
|
||
return (((((bfd_vma)addr[0] << 8) | addr[1]) << 8)
|
||
| addr[2]) << 8 | addr[3];
|
||
}
|
||
|
||
bfd_vma
|
||
bfd_getl32 (addr)
|
||
register bfd_byte *addr;
|
||
{
|
||
return (((((bfd_vma)addr[3] << 8) | addr[2]) << 8)
|
||
| addr[1]) << 8 | addr[0];
|
||
}
|
||
|
||
bfd_signed_vma
|
||
bfd_getb_signed_32 (addr)
|
||
register bfd_byte *addr;
|
||
{
|
||
return COERCE32((((((bfd_vma)addr[0] << 8) | addr[1]) << 8)
|
||
| addr[2]) << 8 | addr[3]);
|
||
}
|
||
|
||
bfd_signed_vma
|
||
bfd_getl_signed_32 (addr)
|
||
register bfd_byte *addr;
|
||
{
|
||
return COERCE32((((((bfd_vma)addr[3] << 8) | addr[2]) << 8)
|
||
| addr[1]) << 8 | addr[0]);
|
||
}
|
||
|
||
bfd_vma
|
||
DEFUN(bfd_getb64,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
#ifdef BFD64
|
||
bfd_vma low, high;
|
||
|
||
high= ((((((((addr[0]) << 8) |
|
||
addr[1]) << 8) |
|
||
addr[2]) << 8) |
|
||
addr[3]) );
|
||
|
||
low = (((((((((bfd_vma)addr[4]) << 8) |
|
||
addr[5]) << 8) |
|
||
addr[6]) << 8) |
|
||
addr[7]));
|
||
|
||
return high << 32 | low;
|
||
#else
|
||
BFD_FAIL();
|
||
return 0;
|
||
#endif
|
||
|
||
}
|
||
|
||
bfd_vma
|
||
DEFUN(bfd_getl64,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
|
||
#ifdef BFD64
|
||
bfd_vma low, high;
|
||
high= (((((((addr[7] << 8) |
|
||
addr[6]) << 8) |
|
||
addr[5]) << 8) |
|
||
addr[4]));
|
||
|
||
low = ((((((((bfd_vma)addr[3] << 8) |
|
||
addr[2]) << 8) |
|
||
addr[1]) << 8) |
|
||
addr[0]) );
|
||
|
||
return high << 32 | low;
|
||
#else
|
||
BFD_FAIL();
|
||
return 0;
|
||
#endif
|
||
|
||
}
|
||
|
||
bfd_signed_vma
|
||
DEFUN(bfd_getb_signed_64,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
#ifdef BFD64
|
||
bfd_vma low, high;
|
||
|
||
high= ((((((((addr[0]) << 8) |
|
||
addr[1]) << 8) |
|
||
addr[2]) << 8) |
|
||
addr[3]) );
|
||
|
||
low = (((((((((bfd_vma)addr[4]) << 8) |
|
||
addr[5]) << 8) |
|
||
addr[6]) << 8) |
|
||
addr[7]));
|
||
|
||
return COERCE64(high << 32 | low);
|
||
#else
|
||
BFD_FAIL();
|
||
return 0;
|
||
#endif
|
||
|
||
}
|
||
|
||
bfd_signed_vma
|
||
DEFUN(bfd_getl_signed_64,(addr),
|
||
register bfd_byte *addr)
|
||
{
|
||
|
||
#ifdef BFD64
|
||
bfd_vma low, high;
|
||
high= (((((((addr[7] << 8) |
|
||
addr[6]) << 8) |
|
||
addr[5]) << 8) |
|
||
addr[4]));
|
||
|
||
low = ((((((((bfd_vma)addr[3] << 8) |
|
||
addr[2]) << 8) |
|
||
addr[1]) << 8) |
|
||
addr[0]) );
|
||
|
||
return COERCE64(high << 32 | low);
|
||
#else
|
||
BFD_FAIL();
|
||
return 0;
|
||
#endif
|
||
|
||
}
|
||
|
||
void
|
||
DEFUN(bfd_putb32,(data, addr),
|
||
bfd_vma data AND
|
||
register bfd_byte *addr)
|
||
{
|
||
addr[0] = (bfd_byte)(data >> 24);
|
||
addr[1] = (bfd_byte)(data >> 16);
|
||
addr[2] = (bfd_byte)(data >> 8);
|
||
addr[3] = (bfd_byte)data;
|
||
}
|
||
|
||
void
|
||
DEFUN(bfd_putl32,(data, addr),
|
||
bfd_vma data AND
|
||
register bfd_byte *addr)
|
||
{
|
||
addr[0] = (bfd_byte)data;
|
||
addr[1] = (bfd_byte)(data >> 8);
|
||
addr[2] = (bfd_byte)(data >> 16);
|
||
addr[3] = (bfd_byte)(data >> 24);
|
||
}
|
||
void
|
||
DEFUN(bfd_putb64,(data, addr),
|
||
bfd_vma data AND
|
||
register bfd_byte *addr)
|
||
{
|
||
#ifdef BFD64
|
||
addr[0] = (bfd_byte)(data >> (7*8));
|
||
addr[1] = (bfd_byte)(data >> (6*8));
|
||
addr[2] = (bfd_byte)(data >> (5*8));
|
||
addr[3] = (bfd_byte)(data >> (4*8));
|
||
addr[4] = (bfd_byte)(data >> (3*8));
|
||
addr[5] = (bfd_byte)(data >> (2*8));
|
||
addr[6] = (bfd_byte)(data >> (1*8));
|
||
addr[7] = (bfd_byte)(data >> (0*8));
|
||
#else
|
||
BFD_FAIL();
|
||
#endif
|
||
|
||
}
|
||
|
||
void
|
||
DEFUN(bfd_putl64,(data, addr),
|
||
bfd_vma data AND
|
||
register bfd_byte *addr)
|
||
{
|
||
#ifdef BFD64
|
||
addr[7] = (bfd_byte)(data >> (7*8));
|
||
addr[6] = (bfd_byte)(data >> (6*8));
|
||
addr[5] = (bfd_byte)(data >> (5*8));
|
||
addr[4] = (bfd_byte)(data >> (4*8));
|
||
addr[3] = (bfd_byte)(data >> (3*8));
|
||
addr[2] = (bfd_byte)(data >> (2*8));
|
||
addr[1] = (bfd_byte)(data >> (1*8));
|
||
addr[0] = (bfd_byte)(data >> (0*8));
|
||
#else
|
||
BFD_FAIL();
|
||
#endif
|
||
|
||
}
|
||
|
||
|
||
/* Default implementation */
|
||
|
||
boolean
|
||
DEFUN(bfd_generic_get_section_contents, (abfd, section, location, offset, count),
|
||
bfd *abfd AND
|
||
sec_ptr section AND
|
||
PTR location AND
|
||
file_ptr offset AND
|
||
bfd_size_type count)
|
||
{
|
||
if (count == 0)
|
||
return true;
|
||
if ((bfd_size_type)(offset+count) > section->_raw_size
|
||
|| bfd_seek(abfd, (file_ptr)(section->filepos + offset), SEEK_SET) == -1
|
||
|| bfd_read(location, (bfd_size_type)1, count, abfd) != count)
|
||
return (false); /* on error */
|
||
return (true);
|
||
}
|
||
|
||
/* This generic function can only be used in implementations where creating
|
||
NEW sections is disallowed. It is useful in patching existing sections
|
||
in read-write files, though. See other set_section_contents functions
|
||
to see why it doesn't work for new sections. */
|
||
boolean
|
||
DEFUN(bfd_generic_set_section_contents, (abfd, section, location, offset, count),
|
||
bfd *abfd AND
|
||
sec_ptr section AND
|
||
PTR location AND
|
||
file_ptr offset AND
|
||
bfd_size_type count)
|
||
{
|
||
if (count == 0)
|
||
return true;
|
||
if ((bfd_size_type)(offset+count) > bfd_get_section_size_after_reloc(section)
|
||
|| bfd_seek(abfd, (file_ptr)(section->filepos + offset), SEEK_SET) == -1
|
||
|| bfd_write(location, (bfd_size_type)1, count, abfd) != count)
|
||
return (false); /* on error */
|
||
return (true);
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
bfd_log2
|
||
|
||
DESCRIPTION
|
||
Return the log base 2 of the value supplied, rounded up. eg an
|
||
arg of 1025 would return 11.
|
||
|
||
SYNOPSIS
|
||
unsigned int bfd_log2(bfd_vma x);
|
||
*/
|
||
|
||
unsigned
|
||
bfd_log2(x)
|
||
bfd_vma x;
|
||
{
|
||
unsigned result = 0;
|
||
while ( (bfd_vma)(1<< result) < x)
|
||
result++;
|
||
return result;
|
||
}
|