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/* Copyright (C) 2001, 2002 Red Hat, Inc.
Written by Jakub Jelinek <jakub@redhat.com>, 2001.
This program 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 2, or (at your option)
any later version.
This program 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 this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <config.h>
#include "prelink.h"
#define UREAD(le,nn) \
uint##nn##_t \
read_u##le##nn (DSO *dso, GElf_Addr addr) \
{ \
Elf_Type type; \
unsigned char *data = get_data (dso, addr, NULL, &type); \
\
if (data == NULL) \
return 0; \
\
if (type == ELF_T_BYTE) \
return buf_read_u##le##nn (data); \
else \
return *(uint##nn##_t *)data; \
}
#define WRITE(le,nn) \
int \
write_##le##nn (DSO *dso, GElf_Addr addr, uint##nn##_t val) \
{ \
int sec; \
Elf_Type type; \
unsigned char *data = get_data (dso, addr, &sec, &type); \
\
if (data == NULL) \
return -1; \
\
if (type == ELF_T_BYTE) \
buf_write_##le##nn (data, val); \
else \
*(uint##nn##_t *)data = val; \
elf_flagscn (dso->scn[sec], ELF_C_SET, ELF_F_DIRTY); \
return 0; \
}
#define READWRITE(le,nn) UREAD(le,nn) WRITE(le,nn)
unsigned char *
get_data (DSO *dso, GElf_Addr addr, int *secp, Elf_Type *typep)
{
int sec = addr_to_sec (dso, addr);
Elf_Data *data = NULL;
if (sec == -1)
return NULL;
if (secp)
*secp = sec;
addr -= dso->shdr[sec].sh_addr;
while ((data = elf_getdata (dso->scn[sec], data)) != NULL)
if (data->d_off <= addr && data->d_off + data->d_size > addr)
{
if (typep) *typep = data->d_type;
return (unsigned char *) data->d_buf + (addr - data->d_off);
}
return NULL;
}
inline uint8_t
buf_read_u8 (unsigned char *data)
{
return *data;
}
inline uint16_t
buf_read_ule16 (unsigned char *data)
{
return data[0] | (data[1] << 8);
}
inline uint16_t
buf_read_ube16 (unsigned char *data)
{
return data[1] | (data[0] << 8);
}
inline uint32_t
buf_read_ule32 (unsigned char *data)
{
return data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
}
inline uint32_t
buf_read_ube32 (unsigned char *data)
{
return data[3] | (data[2] << 8) | (data[1] << 16) | (data[0] << 24);
}
inline uint64_t
buf_read_ule64 (unsigned char *data)
{
return (data[0] | (data[1] << 8) | (data[2] << 16))
| (((uint64_t)data[3]) << 24)
| (((uint64_t)data[4]) << 32)
| (((uint64_t)data[5]) << 40)
| (((uint64_t)data[6]) << 48)
| (((uint64_t)data[7]) << 56);
}
inline uint64_t
buf_read_ube64 (unsigned char *data)
{
return (data[7] | (data[6] << 8) | (data[5] << 16))
| (((uint64_t)data[4]) << 24)
| (((uint64_t)data[3]) << 32)
| (((uint64_t)data[2]) << 40)
| (((uint64_t)data[1]) << 48)
| (((uint64_t)data[0]) << 56);
}
inline void
buf_write_8 (unsigned char *data, uint8_t val)
{
*data = val;
}
inline void
buf_write_le16 (unsigned char *data, uint16_t val)
{
data[0] = val;
data[1] = val >> 8;
}
inline void
buf_write_be16 (unsigned char *data, uint16_t val)
{
data[1] = val;
data[0] = val >> 8;
}
inline void
buf_write_le32 (unsigned char *data, uint32_t val)
{
data[0] = val;
data[1] = val >> 8;
data[2] = val >> 16;
data[3] = val >> 24;
}
inline void
buf_write_be32 (unsigned char *data, uint32_t val)
{
data[3] = val;
data[2] = val >> 8;
data[1] = val >> 16;
data[0] = val >> 24;
}
inline void
buf_write_le64 (unsigned char *data, uint64_t val)
{
data[0] = val;
data[1] = val >> 8;
data[2] = val >> 16;
data[3] = val >> 24;
data[4] = val >> 32;
data[5] = val >> 40;
data[6] = val >> 48;
data[7] = val >> 56;
}
inline void
buf_write_be64 (unsigned char *data, uint64_t val)
{
data[7] = val;
data[6] = val >> 8;
data[5] = val >> 16;
data[4] = val >> 24;
data[3] = val >> 32;
data[2] = val >> 40;
data[1] = val >> 48;
data[0] = val >> 56;
}
READWRITE(,8)
READWRITE(le,16)
READWRITE(be,16)
READWRITE(le,32)
READWRITE(be,32)
READWRITE(le,64)
READWRITE(be,64)
const char *
strptr (DSO *dso, int sec, off_t offset)
{
Elf_Scn *scn;
Elf_Data *data;
scn = dso->scn[sec];
if (offset >= 0 && offset < dso->shdr[sec].sh_size)
{
data = NULL;
while ((data = elf_getdata (scn, data)) != NULL)
{
if (data->d_buf
&& offset >= data->d_off
&& offset < data->d_off + data->d_size)
return (const char *) data->d_buf + (offset - data->d_off);
}
}
return NULL;
}
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