it with FreeBSD's implementation --HG-- extra : convert_revision : ef9c4551b9a6b54b76a89f286ff9804c55790621
175 lines
5.1 KiB
C
175 lines
5.1 KiB
C
/*-
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* Copyright (c) 2006 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <limits.h>
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#include "gelf.h"
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#include "libelf.h"
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#include "_libelf.h"
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Elf32_Phdr *
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elf32_getphdr(Elf *e)
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{
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return (_libelf_getphdr(e, ELFCLASS32));
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}
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Elf64_Phdr *
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elf64_getphdr(Elf *e)
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{
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return (_libelf_getphdr(e, ELFCLASS64));
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}
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GElf_Phdr *
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gelf_getphdr(Elf *e, int index, GElf_Phdr *d)
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{
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int ec;
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Elf32_Ehdr *eh32;
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Elf64_Ehdr *eh64;
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Elf32_Phdr *ep32;
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Elf64_Phdr *ep64;
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if (d == NULL || e == NULL ||
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((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) ||
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(e->e_kind != ELF_K_ELF) || index < 0) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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if (ec == ELFCLASS32) {
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if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL ||
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((ep32 = _libelf_getphdr(e, ELFCLASS32)) == NULL))
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return (NULL);
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if (index >= eh32->e_phnum) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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ep32 += index;
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d->p_type = ep32->p_type;
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d->p_offset = ep32->p_offset;
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d->p_vaddr = (Elf64_Addr) ep32->p_vaddr;
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d->p_paddr = (Elf64_Addr) ep32->p_paddr;
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d->p_filesz = (Elf64_Xword) ep32->p_filesz;
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d->p_memsz = (Elf64_Xword) ep32->p_memsz;
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d->p_flags = ep32->p_flags;
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d->p_align = (Elf64_Xword) ep32->p_align;
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} else {
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if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL ||
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(ep64 = _libelf_getphdr(e, ELFCLASS64)) == NULL)
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return (NULL);
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if (index >= eh64->e_phnum) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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ep64 += index;
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*d = *ep64;
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}
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return (d);
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}
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Elf32_Phdr *
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elf32_newphdr(Elf *e, size_t count)
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{
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return (_libelf_newphdr(e, ELFCLASS32, count));
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}
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Elf64_Phdr *
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elf64_newphdr(Elf *e, size_t count)
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{
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return (_libelf_newphdr(e, ELFCLASS64, count));
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}
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void *
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gelf_newphdr(Elf *e, size_t count)
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{
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if (e == NULL) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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return (_libelf_newphdr(e, e->e_class, count));
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}
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int
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gelf_update_phdr(Elf *e, int ndx, GElf_Phdr *s)
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{
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int ec, phnum;
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void *ehdr;
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Elf32_Phdr *ph32;
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Elf64_Phdr *ph64;
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if (s == NULL || e == NULL || e->e_kind != ELF_K_ELF ||
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((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (0);
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}
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if (e->e_cmd == ELF_C_READ) {
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LIBELF_SET_ERROR(MODE, 0);
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return (0);
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}
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if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
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return (0);
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if (ec == ELFCLASS32)
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phnum = ((Elf32_Ehdr *) ehdr)->e_phnum;
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else
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phnum = ((Elf64_Ehdr *) ehdr)->e_phnum;
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if (ndx < 0 || ndx > phnum) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (0);
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}
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if (ec == ELFCLASS64) {
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ph64 = e->e_u.e_elf.e_phdr.e_phdr64 + ndx;
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*ph64 = *s;
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return (1);
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}
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ph32 = e->e_u.e_elf.e_phdr.e_phdr32 + ndx;
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ph32->p_type = s->p_type;
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ph32->p_flags = s->p_flags;
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LIBELF_COPY_U32(ph32, s, p_offset);
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LIBELF_COPY_U32(ph32, s, p_vaddr);
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LIBELF_COPY_U32(ph32, s, p_paddr);
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LIBELF_COPY_U32(ph32, s, p_filesz);
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LIBELF_COPY_U32(ph32, s, p_memsz);
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LIBELF_COPY_U32(ph32, s, p_align);
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(void) elf_flagphdr(e, ELF_C_SET, ELF_F_DIRTY);
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return (1);
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}
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