freebsd-dev/lib/libelf/gelf_phdr.c

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/*-
* Copyright (c) 2006 Joseph Koshy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/limits.h>
#include <gelf.h>
#include <libelf.h>
#include "_libelf.h"
Elf32_Phdr *
elf32_getphdr(Elf *e)
{
return (_libelf_getphdr(e, ELFCLASS32));
}
Elf64_Phdr *
elf64_getphdr(Elf *e)
{
return (_libelf_getphdr(e, ELFCLASS64));
}
GElf_Phdr *
gelf_getphdr(Elf *e, int index, GElf_Phdr *d)
{
int ec;
Elf32_Ehdr *eh32;
Elf64_Ehdr *eh64;
Elf32_Phdr *ep32;
Elf64_Phdr *ep64;
if (d == NULL || e == NULL ||
((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) ||
(e->e_kind != ELF_K_ELF) || index < 0) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (NULL);
}
if (ec == ELFCLASS32) {
if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL ||
((ep32 = _libelf_getphdr(e, ELFCLASS32)) == NULL))
return (NULL);
if (index >= eh32->e_phnum) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (NULL);
}
ep32 += index;
d->p_type = ep32->p_type;
d->p_offset = ep32->p_offset;
d->p_vaddr = (Elf64_Addr) ep32->p_vaddr;
d->p_paddr = (Elf64_Addr) ep32->p_paddr;
d->p_filesz = (Elf64_Xword) ep32->p_filesz;
d->p_memsz = (Elf64_Xword) ep32->p_memsz;
d->p_flags = ep32->p_flags;
d->p_align = (Elf64_Xword) ep32->p_align;
} else {
if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL ||
(ep64 = _libelf_getphdr(e, ELFCLASS64)) == NULL)
return (NULL);
if (index >= eh64->e_phnum) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (NULL);
}
ep64 += index;
*d = *ep64;
}
return (d);
}
Elf32_Phdr *
elf32_newphdr(Elf *e, size_t count)
{
return (_libelf_newphdr(e, ELFCLASS32, count));
}
Elf64_Phdr *
elf64_newphdr(Elf *e, size_t count)
{
return (_libelf_newphdr(e, ELFCLASS64, count));
}
void *
gelf_newphdr(Elf *e, size_t count)
{
if (e == NULL) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (NULL);
}
return (_libelf_newphdr(e, e->e_class, count));
}
int
gelf_update_phdr(Elf *e, int ndx, GElf_Phdr *s)
{
int ec, phnum;
void *ehdr;
Elf32_Phdr *ph32;
Elf64_Phdr *ph64;
if (s == NULL || e == NULL || e->e_kind != ELF_K_ELF ||
((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (0);
}
if (e->e_cmd == ELF_C_READ) {
LIBELF_SET_ERROR(MODE, 0);
return (0);
}
if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
return (0);
if (ec == ELFCLASS32)
phnum = ((Elf32_Ehdr *) ehdr)->e_phnum;
else
phnum = ((Elf64_Ehdr *) ehdr)->e_phnum;
if (ndx < 0 || ndx > phnum) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (0);
}
if (ec == ELFCLASS64) {
ph64 = e->e_u.e_elf.e_phdr.e_phdr64 + ndx;
*ph64 = *s;
return (1);
}
ph32 = e->e_u.e_elf.e_phdr.e_phdr32 + ndx;
ph32->p_type = s->p_type;
ph32->p_flags = s->p_flags;
LIBELF_COPY_U32(ph32, s, p_offset);
LIBELF_COPY_U32(ph32, s, p_vaddr);
LIBELF_COPY_U32(ph32, s, p_paddr);
LIBELF_COPY_U32(ph32, s, p_filesz);
LIBELF_COPY_U32(ph32, s, p_memsz);
LIBELF_COPY_U32(ph32, s, p_align);
(void) elf_flagphdr(e, ELF_C_SET, ELF_F_DIRTY);
return (1);
}