diff options
Diffstat (limited to 'lib/libelf/elf_strptr.c')
| -rw-r--r-- | lib/libelf/elf_strptr.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/lib/libelf/elf_strptr.c b/lib/libelf/elf_strptr.c deleted file mode 100644 index e137622..0000000 --- a/lib/libelf/elf_strptr.c +++ /dev/null @@ -1,133 +0,0 @@ -/*- - * 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/param.h> - -#include <assert.h> -#include <gelf.h> - -#include "_libelf.h" - -/* - * Convert an ELF section#,offset pair to a string pointer. - */ - -char * -elf_strptr(Elf *e, size_t scndx, size_t offset) -{ - Elf_Scn *s; - Elf_Data *d; - size_t alignment, count; - GElf_Shdr shdr; - - if (e == NULL || e->e_kind != ELF_K_ELF) { - LIBELF_SET_ERROR(ARGUMENT, 0); - return (NULL); - } - - if ((s = elf_getscn(e, scndx)) == NULL || - gelf_getshdr(s, &shdr) == NULL) - return (NULL); - - if (/*shdr.sh_type != SHT_STRTAB || */ - offset >= shdr.sh_size) { - LIBELF_SET_ERROR(ARGUMENT, 0); - return (NULL); - } - - d = NULL; - if (e->e_flags & ELF_F_LAYOUT) { - - /* - * The application is taking responsibility for the - * ELF object's layout, so we can directly translate - * an offset to a `char *' address using the `d_off' - * members of Elf_Data descriptors. - */ - while ((d = elf_getdata(s, d)) != NULL) { - - if (d->d_buf == 0 || d->d_size == 0) - continue; - - if (d->d_type != ELF_T_BYTE) { - LIBELF_SET_ERROR(DATA, 0); - return (NULL); - } - - if (offset >= d->d_off && - offset < d->d_off + d->d_size) - return ((char *) d->d_buf + offset - d->d_off); - } - } else { - /* - * Otherwise, the `d_off' members are not useable and - * we need to compute offsets ourselves, taking into - * account 'holes' in coverage of the section introduced - * by alignment requirements. - */ - count = (size_t) 0; /* cumulative count of bytes seen */ - while ((d = elf_getdata(s, d)) != NULL && count <= offset) { - - if (d->d_buf == NULL || d->d_size == 0) - continue; - - if (d->d_type != ELF_T_BYTE) { - LIBELF_SET_ERROR(DATA, 0); - return (NULL); - } - - if ((alignment = d->d_align) > 1) { - if ((alignment & (alignment - 1)) != 0) { - LIBELF_SET_ERROR(DATA, 0); - return (NULL); - } - count = roundup2(count, alignment); - } - - if (offset < count) { - /* offset starts in the 'hole' */ - LIBELF_SET_ERROR(ARGUMENT, 0); - return (NULL); - } - - if (offset < count + d->d_size) { - if (d->d_buf != NULL) - return ((char *) d->d_buf + - offset - count); - LIBELF_SET_ERROR(DATA, 0); - return (NULL); - } - - count += d->d_size; - } - } - - LIBELF_SET_ERROR(ARGUMENT, 0); - return (NULL); -} |
