You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
3.5 KiB
144 lines
3.5 KiB
/* Update program header program header table entry.
|
|
Copyright (C) 2000-2010 Red Hat, Inc.
|
|
This file is part of elfutils.
|
|
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
|
|
|
|
This file is free software; you can redistribute it and/or modify
|
|
it under the terms of either
|
|
|
|
* the GNU Lesser General Public License as published by the Free
|
|
Software Foundation; either version 3 of the License, or (at
|
|
your option) any later version
|
|
|
|
or
|
|
|
|
* the GNU General Public License as published by the Free
|
|
Software Foundation; either version 2 of the License, or (at
|
|
your option) any later version
|
|
|
|
or both in parallel, as here.
|
|
|
|
elfutils 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 copies of the GNU General Public License and
|
|
the GNU Lesser General Public License along with this program. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <gelf.h>
|
|
#include <string.h>
|
|
|
|
#include "libelfP.h"
|
|
|
|
|
|
int
|
|
gelf_update_phdr (Elf *elf, int ndx, GElf_Phdr *src)
|
|
{
|
|
int result = 0;
|
|
|
|
if (elf == NULL)
|
|
return 0;
|
|
|
|
if (unlikely (elf->kind != ELF_K_ELF))
|
|
{
|
|
__libelf_seterrno (ELF_E_INVALID_HANDLE);
|
|
return 0;
|
|
}
|
|
|
|
rwlock_wrlock (elf->lock);
|
|
|
|
if (elf->class == ELFCLASS32)
|
|
{
|
|
Elf32_Phdr *phdr = elf->state.elf32.phdr;
|
|
|
|
/* We have to convert the data to the 32 bit format. This might
|
|
overflow some fields so we have to test for this case before
|
|
copying. */
|
|
if (unlikely (src->p_offset > 0xffffffffull)
|
|
|| unlikely (src->p_vaddr > 0xffffffffull)
|
|
|| unlikely (src->p_paddr > 0xffffffffull)
|
|
|| unlikely (src->p_filesz > 0xffffffffull)
|
|
|| unlikely (src->p_memsz > 0xffffffffull)
|
|
|| unlikely (src->p_align > 0xffffffffull))
|
|
{
|
|
__libelf_seterrno (ELF_E_INVALID_DATA);
|
|
goto out;
|
|
}
|
|
|
|
if (phdr == NULL)
|
|
{
|
|
phdr = __elf32_getphdr_wrlock (elf);
|
|
if (phdr == NULL)
|
|
/* The error number is already set. */
|
|
goto out;
|
|
}
|
|
|
|
/* Test whether the index is ok. */
|
|
size_t phnum;
|
|
if (ndx >= elf->state.elf32.ehdr->e_phnum
|
|
&& (elf->state.elf32.ehdr->e_phnum != PN_XNUM
|
|
|| __elf_getphdrnum_rdlock (elf, &phnum) != 0
|
|
|| (size_t) ndx >= phnum))
|
|
{
|
|
__libelf_seterrno (ELF_E_INVALID_INDEX);
|
|
goto out;
|
|
}
|
|
|
|
/* Now correct the pointer to point to the correct element. */
|
|
phdr += ndx;
|
|
|
|
#define COPY(name) \
|
|
phdr->name = src->name
|
|
COPY (p_type);
|
|
COPY (p_offset);
|
|
COPY (p_vaddr);
|
|
COPY (p_paddr);
|
|
COPY (p_filesz);
|
|
COPY (p_memsz);
|
|
COPY (p_flags);
|
|
COPY (p_align);
|
|
}
|
|
else
|
|
{
|
|
Elf64_Phdr *phdr = elf->state.elf64.phdr;
|
|
|
|
if (phdr == NULL)
|
|
{
|
|
phdr = __elf64_getphdr_wrlock (elf);
|
|
if (phdr == NULL)
|
|
/* The error number is already set. */
|
|
goto out;
|
|
}
|
|
|
|
/* Test whether the index is ok. */
|
|
size_t phnum;
|
|
if (ndx >= elf->state.elf64.ehdr->e_phnum
|
|
&& (elf->state.elf64.ehdr->e_phnum != PN_XNUM
|
|
|| __elf_getphdrnum_rdlock (elf, &phnum) != 0
|
|
|| (size_t) ndx >= phnum))
|
|
{
|
|
__libelf_seterrno (ELF_E_INVALID_INDEX);
|
|
goto out;
|
|
}
|
|
|
|
/* Just copy the data. */
|
|
memcpy (phdr + ndx, src, sizeof (Elf64_Phdr));
|
|
}
|
|
|
|
/* Mark the program header as modified. */
|
|
elf->state.elf.phdr_flags |= ELF_F_DIRTY;
|
|
|
|
result = 1;
|
|
|
|
out:
|
|
rwlock_unlock (elf->lock);
|
|
|
|
return result;
|
|
}
|