binutils-gdb/bfd/libbfd.c

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/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Diddler.
BFD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
BFD is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with BFD; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* $Id$ */
/*** libbfd.c -- random bfd support routines used internally only. */
#include <sysdep.h>
#include "bfd.h"
#include "libbfd.h"
/** Dummies for targets that don't want or need to implement
certain operations */
boolean
DEFUN(_bfd_dummy_new_section_hook,(ignore, ignore_newsect),
bfd *ignore AND
asection *ignore_newsect)
{
return true;
}
boolean
DEFUN(bfd_false ,(ignore),
bfd *ignore)
{
return false;
}
boolean
DEFUN(bfd_true,(ignore),
bfd *ignore)
{
return true;
}
PTR
DEFUN(bfd_nullvoidptr,(ignore),
bfd *ignore)
{
return (PTR)NULL;
}
int
DEFUN(bfd_0,(ignore),
bfd *ignore)
{
return 0;
}
unsigned int
DEFUN(bfd_0u,(ignore),
bfd *ignore)
{
return 0;
}
void
DEFUN(bfd_void,(ignore),
bfd *ignore)
{
}
boolean
DEFUN(_bfd_dummy_core_file_matches_executable_p,(ignore_core_bfd, ignore_exec_bfd),
bfd *ignore_core_bfd AND
bfd *ignore_exec_bfd)
{
bfd_error = invalid_operation;
return false;
}
/* of course you can't initialize a function to be the same as another, grr */
char *
DEFUN(_bfd_dummy_core_file_failing_command,(ignore_abfd),
bfd *ignore_abfd)
{
return (char *)NULL;
}
int
DEFUN(_bfd_dummy_core_file_failing_signal,(ignore_abfd),
bfd *ignore_abfd)
{
return 0;
}
bfd_target *
DEFUN(_bfd_dummy_target,(ignore_abfd),
bfd *ignore_abfd)
{
return 0;
}
/** zalloc -- allocate and clear storage */
#ifndef zalloc
char *
DEFUN(zalloc,(size),
bfd_size_type size)
{
char *ptr = (char *) malloc ((int)size);
if ((ptr != NULL) && (size != 0))
memset(ptr,0, size);
return ptr;
}
#endif
/* Some IO code */
/* Note that archive entries don't have streams; they share their parent's.
This allows someone to play with the iostream behind bfd's back.
Also, note that the origin pointer points to the beginning of a file's
contents (0 for non-archive elements). For archive entries this is the
first octet in the file, NOT the beginning of the archive header. */
static
int DEFUN(real_read,(where, a,b, file),
PTR where AND
int a AND
int b AND
FILE *file)
{
return fread(where, a,b,file);
}
bfd_size_type
DEFUN(bfd_read,(ptr, size, nitems, abfd),
PTR ptr AND
bfd_size_type size AND
bfd_size_type nitems AND
bfd *abfd)
{
return (bfd_size_type)real_read (ptr, 1, (int)(size*nitems), bfd_cache_lookup(abfd));
}
bfd_size_type
DEFUN(bfd_write,(ptr, size, nitems, abfd),
PTR ptr AND
bfd_size_type size AND
bfd_size_type nitems AND
bfd *abfd)
{
return fwrite (ptr, 1, (int)(size*nitems), bfd_cache_lookup(abfd));
}
int
DEFUN(bfd_seek,(abfd, position, direction),
bfd * CONST abfd AND
CONST file_ptr position AND
CONST int direction)
{
/* For the time being, a bfd may not seek to it's end. The
problem is that we don't easily have a way to recognize
the end of an element in an archive. */
BFD_ASSERT(direction == SEEK_SET
|| direction == SEEK_CUR);
if (direction == SEEK_SET && abfd->my_archive != NULL)
{
/* This is a set within an archive, so we need to
add the base of the object within the archive */
return(fseek(bfd_cache_lookup(abfd),
position + abfd->origin,
direction));
}
else
{
return(fseek(bfd_cache_lookup(abfd), position, direction));
}
}
long
DEFUN(bfd_tell,(abfd),
bfd *abfd)
{
file_ptr ptr;
ptr = ftell (bfd_cache_lookup(abfd));
if (abfd->my_archive)
ptr -= abfd->origin;
return ptr;
}
/** Make a string table */
/* Add string to table pointed to by table, at location starting with free_ptr.
resizes the table if necessary (if it's NULL, creates it, ignoring
table_length). Updates free_ptr, table, table_length */
boolean
DEFUN(bfd_add_to_string_table,(table, new_string, table_length, free_ptr),
char **table AND
char *new_string AND
unsigned int *table_length AND
char **free_ptr)
{
size_t string_length = strlen (new_string) + 1; /* include null here */
char *base = *table;
size_t space_length = *table_length;
unsigned int offset = (base ? *free_ptr - base : 0);
if (base == NULL) {
/* Avoid a useless regrow if we can (but of course we still
take it next time */
space_length = (string_length < DEFAULT_STRING_SPACE_SIZE ?
DEFAULT_STRING_SPACE_SIZE : string_length+1);
base = zalloc (space_length);
if (base == NULL) {
bfd_error = no_memory;
return false;
}
}
if ((size_t)(offset + string_length) >= space_length) {
/* Make sure we will have enough space */
while ((size_t)(offset + string_length) >= space_length)
space_length += space_length/2; /* grow by 50% */
base = (char *) realloc (base, space_length);
if (base == NULL) {
bfd_error = no_memory;
return false;
}
}
memcpy (base + offset, new_string, string_length);
*table = base;
*table_length = space_length;
*free_ptr = base + offset + string_length;
return true;
}
/** The do-it-yourself (byte) sex-change kit */
/* The middle letter e.g. get<b>short indicates Big or Little endian
target machine. It doesn't matter what the byte order of the host
machine is; these routines work for either. */
/* FIXME: Should these take a count argument?
Answer (gnu@cygnus.com): No, but perhaps they should be inline
functions in swap.h #ifdef __GNUC__.
Gprof them later and find out. */
unsigned int
DEFUN(_do_getb16,(addr),
register bfd_byte *addr)
{
return (addr[0] << 8) | addr[1];
}
unsigned int
DEFUN(_do_getl16,(addr),
register bfd_byte *addr)
{
return (addr[1] << 8) | addr[0];
}
void
DEFUN(_do_putb16,(data, addr),
int data AND
register bfd_byte *addr)
{
addr[0] = (bfd_byte)(data >> 8);
addr[1] = (bfd_byte )data;
}
void
DEFUN(_do_putl16,(data, addr),
int data AND
register bfd_byte *addr)
{
addr[0] = (bfd_byte )data;
addr[1] = (bfd_byte)(data >> 8);
}
unsigned int
DEFUN(_do_getb32,(addr),
register bfd_byte *addr)
{
return ((((addr[0] << 8) | addr[1]) << 8) | addr[2]) << 8 | addr[3];
}
unsigned int
_do_getl32 (addr)
register bfd_byte *addr;
{
return ((((addr[3] << 8) | addr[2]) << 8) | addr[1]) << 8 | addr[0];
}
bfd_64_type
DEFUN(_do_getb64,(addr),
register bfd_byte *addr)
{
#ifdef HOST_64_BIT
bfd_64_type low, high;
high= ((((((((addr[0]) << 8) |
addr[1]) << 8) |
addr[2]) << 8) |
addr[3]) );
low = ((((((((addr[4]) << 8) |
addr[5]) << 8) |
addr[6]) << 8) |
addr[7]));
return high << 32 | low;
#else
BFD_FAIL();
#endif
}
bfd_64_type
DEFUN(_do_getl64,(addr),
register bfd_byte *addr)
{
bfd_64_type low, high;
#ifdef HOST_64_BIT
high= (((((((addr[7] << 8) |
addr[6]) << 8) |
addr[5]) << 8) |
addr[4]));
low = (((((((addr[3] << 8) |
addr[2]) << 8) |
addr[1]) << 8) |
addr[0]) );
return high << 32 | low;
#else
BFD_FAIL();
#endif
}
void
DEFUN(_do_putb32,(data, addr),
unsigned long 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(_do_putl32,(data, addr),
unsigned long 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(_do_putb64,(data, addr),
bfd_64_type data AND
register bfd_byte *addr)
{
#ifdef HOST_64_BIT
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(_do_putl64,(data, addr),
bfd_64_type data AND
register bfd_byte *addr)
{
#ifdef HOST_64_BIT
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 >= section->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);
}