mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-20 10:42:21 +00:00
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/* Get section at specific index.
|
|
Copyright (C) 2005, 2008, 2015 Red Hat, Inc.
|
|
This file is part of elfutils.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
|
|
|
|
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 <assert.h>
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "libelfP.h"
|
|
|
|
#ifndef LIBELFBITS
|
|
# define LIBELFBITS 32
|
|
#endif
|
|
|
|
|
|
Elf_Scn *
|
|
elfw2(LIBELFBITS,offscn) (Elf *elf, ElfW2(LIBELFBITS,Off) offset)
|
|
{
|
|
if (elf == NULL)
|
|
return NULL;
|
|
|
|
if (unlikely (elf->kind != ELF_K_ELF))
|
|
{
|
|
__libelf_seterrno (ELF_E_INVALID_HANDLE);
|
|
return NULL;
|
|
}
|
|
|
|
Elf_ScnList *runp = &elf->state.ELFW(elf,LIBELFBITS).scns;
|
|
|
|
/* If we have not looked at section headers before,
|
|
we might need to read them in first. */
|
|
if (runp->cnt > 0
|
|
&& unlikely (runp->data[0].shdr.ELFW(e,LIBELFBITS) == NULL)
|
|
&& unlikely (elfw2(LIBELFBITS,getshdr) (&runp->data[0]) == NULL))
|
|
return NULL;
|
|
|
|
rwlock_rdlock (elf->lock);
|
|
|
|
Elf_Scn *result = NULL;
|
|
|
|
/* Find the section in the list. */
|
|
while (1)
|
|
{
|
|
for (unsigned int i = 0; i < runp->cnt; ++i)
|
|
if (runp->data[i].shdr.ELFW(e,LIBELFBITS)->sh_offset == offset)
|
|
{
|
|
result = &runp->data[i];
|
|
|
|
/* If this section is empty, the following one has the same
|
|
sh_offset. We presume the caller is looking for a nonempty
|
|
section, so keep looking if this one is empty. */
|
|
if (runp->data[i].shdr.ELFW(e,LIBELFBITS)->sh_size != 0
|
|
&& runp->data[i].shdr.ELFW(e,LIBELFBITS)->sh_type != SHT_NOBITS)
|
|
goto out;
|
|
}
|
|
|
|
runp = runp->next;
|
|
if (runp == NULL)
|
|
{
|
|
__libelf_seterrno (ELF_E_INVALID_OFFSET);
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
rwlock_unlock (elf->lock);
|
|
|
|
return result;
|
|
}
|
|
INTDEF(elfw2(LIBELFBITS,offscn))
|