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author | jkoshy <jkoshy@FreeBSD.org> | 2006-11-11 17:16:35 +0000 |
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committer | jkoshy <jkoshy@FreeBSD.org> | 2006-11-11 17:16:35 +0000 |
commit | 62913629e64cdad23072cfd4ad8340f4c0b91ec5 (patch) | |
tree | c2ad604787a38d6ad26a0bffea71f283f73e901d /lib/libelf/elf_memory.c | |
parent | c51a2c2df9d95524e4fec5b0ec36ca0a9f503823 (diff) | |
download | FreeBSD-src-62913629e64cdad23072cfd4ad8340f4c0b91ec5.zip FreeBSD-src-62913629e64cdad23072cfd4ad8340f4c0b91ec5.tar.gz |
MFP4: Add an implementation of the ELF(3) and GELF(3) API set.
Bump __FreeBSD_version.
Reviewed by: jb
Diffstat (limited to 'lib/libelf/elf_memory.c')
-rw-r--r-- | lib/libelf/elf_memory.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/libelf/elf_memory.c b/lib/libelf/elf_memory.c new file mode 100644 index 0000000..f42378e --- /dev/null +++ b/lib/libelf/elf_memory.c @@ -0,0 +1,91 @@ +/*- + * 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 <ar.h> +#include <libelf.h> +#include <string.h> + +#include "_libelf.h" + +Elf * +elf_memory(char *image, size_t sz) +{ + Elf *e; + + if (LIBELF_PRIVATE(version) == EV_NONE) { + LIBELF_SET_ERROR(SEQUENCE, 0); + return (NULL); + } + + if (image == NULL || sz == 0) { + LIBELF_SET_ERROR(ARGUMENT, 0); + return (NULL); + } + + if ((e = _libelf_allocate_elf()) == NULL) + return (NULL); + + e->e_cmd = ELF_C_READ; + e->e_rawfile = image; + e->e_rawsize = sz; + +#undef LIBELF_IS_ELF +#define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \ + (P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \ + (P)[EI_MAG3] == ELFMAG3) + + if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) { + _libelf_init_elf(e, ELF_K_ELF); + e->e_class = image[EI_CLASS]; + e->e_byteorder = image[EI_DATA]; + e->e_version = image[EI_VERSION]; + + if (e->e_version > EV_CURRENT) { + e = _libelf_release_elf(e); + LIBELF_SET_ERROR(VERSION, 0); + return (NULL); + } + + if ((e->e_byteorder != ELFDATA2LSB && e->e_byteorder != + ELFDATA2MSB) || (e->e_class != ELFCLASS32 && e->e_class != + ELFCLASS64)) { + e = _libelf_release_elf(e); + LIBELF_SET_ERROR(HEADER, 0); + return (NULL); + } + + } else if (sz >= SARMAG && + strncmp(image, ARMAG, (size_t) SARMAG) == 0) { + _libelf_init_elf(e, ELF_K_AR); + e = _libelf_ar_open(e); + } else + _libelf_init_elf(e, ELF_K_NONE); + + return (e); +} |