diff options
Diffstat (limited to 'lib/libelf/elf_errmsg.c')
-rw-r--r-- | lib/libelf/elf_errmsg.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/lib/libelf/elf_errmsg.c b/lib/libelf/elf_errmsg.c new file mode 100644 index 0000000..05947a7 --- /dev/null +++ b/lib/libelf/elf_errmsg.c @@ -0,0 +1,100 @@ +/*- + * 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 <libelf.h> +#include <string.h> + +#include "_libelf.h" + +/* + * Retrieve a human readable translation for an error message. + */ + +const char *_libelf_errors[] = { +#define DEFINE_ERROR(N,S) [ELF_E_##N] = S + DEFINE_ERROR(NONE, "No Error"), + DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"), + DEFINE_ERROR(ARGUMENT, "Invalid argument"), + DEFINE_ERROR(CLASS, "ELF class mismatch"), + DEFINE_ERROR(DATA, "Invalid data buffer descriptor"), + DEFINE_ERROR(HEADER, "Missing or malformed ELF header"), + DEFINE_ERROR(IO, "I/O error"), + DEFINE_ERROR(LAYOUT, "Layout constraint violation"), + DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"), + DEFINE_ERROR(RANGE, "Value out of range of target"), + DEFINE_ERROR(RESOURCE, "Resource exhaustion"), + DEFINE_ERROR(SECTION, "Invalid section descriptor"), + DEFINE_ERROR(SEQUENCE, "API calls out of sequence"), + DEFINE_ERROR(UNIMPL, "Unimplemented feature"), + DEFINE_ERROR(VERSION, "Unknown ELF API version"), + DEFINE_ERROR(NUM, "Unknown error") +#undef DEFINE_ERROR +}; + +const char * +elf_errmsg(int error) +{ + int oserr; + + if (error == 0 && (error = LIBELF_PRIVATE(error)) == 0) + return NULL; + else if (error == -1) + error = LIBELF_PRIVATE(error); + + oserr = error >> LIBELF_OS_ERROR_SHIFT; + error &= LIBELF_ELF_ERROR_MASK; + + if (error < 0 || error >= ELF_E_NUM) + return _libelf_errors[ELF_E_NUM]; + if (oserr) { + strlcpy(LIBELF_PRIVATE(msg), _libelf_errors[error], + sizeof(LIBELF_PRIVATE(msg))); + strlcat(LIBELF_PRIVATE(msg), ": ", sizeof(LIBELF_PRIVATE(msg))); + strlcat(LIBELF_PRIVATE(msg), strerror(oserr), + sizeof(LIBELF_PRIVATE(msg))); + return (const char *)&LIBELF_PRIVATE(msg); + } + return _libelf_errors[error]; +} + +#if defined(LIBELF_TEST_HOOKS) + +const char * +_libelf_get_unknown_error_message(void) +{ + return _libelf_errors[ELF_E_NUM]; +} + +const char * +_libelf_get_no_error_message(void) +{ + return _libelf_errors[0]; +} + +#endif /* LIBELF_TEST_HOOKS */ |