mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
443 lines
9.4 KiB
C
443 lines
9.4 KiB
C
/* 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);
|
||
}
|