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- /*
- input.c - low-level input for libelf.
- Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
- #include <private.h>
-
- void*
- _elf_read(Elf *elf, void *buffer, size_t off, size_t len) {
- void *tmp;
-
- elf_assert(elf);
- elf_assert(elf->e_magic == ELF_MAGIC);
- elf_assert(off >= 0 && off + len <= elf->e_size);
- if (elf->e_disabled) {
- seterr(ERROR_FDDISABLED);
- }
- else if (len) {
- off += elf->e_base;
- if (lseek(elf->e_fd, off, 0) != (off_t)off) {
- seterr(ERROR_IO_SEEK);
- }
- else if (!(tmp = buffer) && !(tmp = malloc(len))) {
- seterr(ERROR_IO_2BIG);
- }
- else if (read(elf->e_fd, tmp, len) != (int)len) {
- seterr(ERROR_IO_READ);
- if (tmp != buffer) {
- free(tmp);
- }
- }
- else {
- return tmp;
- }
- }
- return NULL;
- }
-