52 lines
1.4 KiB
C
Executable File
52 lines
1.4 KiB
C
Executable File
/*
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input.c - low-level input for libelf.
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Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <private.h>
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void*
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_elf_read(Elf *elf, void *buffer, size_t off, size_t len) {
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void *tmp;
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elf_assert(elf);
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elf_assert(elf->e_magic == ELF_MAGIC);
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elf_assert(off >= 0 && off + len <= elf->e_size);
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if (elf->e_disabled) {
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seterr(ERROR_FDDISABLED);
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}
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else if (len) {
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off += elf->e_base;
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if (lseek(elf->e_fd, off, 0) != (off_t)off) {
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seterr(ERROR_IO_SEEK);
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}
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else if (!(tmp = buffer) && !(tmp = malloc(len))) {
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seterr(ERROR_IO_2BIG);
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}
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else if (read(elf->e_fd, tmp, len) != (int)len) {
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seterr(ERROR_IO_READ);
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if (tmp != buffer) {
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free(tmp);
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}
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}
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else {
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return tmp;
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}
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}
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return NULL;
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}
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