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DESTDIR=/usr/local/ | ||
BINDIR=bin | ||
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PROG= elfdbg | ||
SRCS= elfdbg.c | ||
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CFLAGS+=-lelf | ||
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.include <bsd.prog.mk> |
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# elfdbg |
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.\" Copyright (c) 2015 Sofian Brabez <sbz@FreeBSD.org> | ||
.\" 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. | ||
.\" | ||
.Dd January 20, 2015 | ||
.Dt ELFDBG 1 | ||
.Os | ||
.Sh NAME | ||
.Nm elfdbg | ||
.Nd analyze if binary is compiled with debug sections | ||
.Sh SYNOPSIS | ||
.Nm | ||
.Op Ar file | ||
.Sh DESCRIPTION | ||
The | ||
.Nm | ||
utility reports if a binary is compiled with debug sections, commonly | ||
known as | ||
.Ar -g | ||
compiler toolchain flag. | ||
.Sh SEE ALSO | ||
.Xr libelf 3 , | ||
.Sh AUTHORS | ||
.An -nosplit | ||
The | ||
.Nm | ||
program was written by | ||
.An Sofian Brabez Aq Mt sbz@FreeBSD.org . |
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/*- | ||
* Copyright (c) 2015 Sofian Brabez <sbz@FreeBSD.org> | ||
* 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 | ||
* in this position and unchanged. | ||
* 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(S) ``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(S) 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 <err.h> | ||
#include <fcntl.h> | ||
#include <gelf.h> | ||
#include <stdint.h> | ||
#include <string.h> | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <sysexits.h> | ||
#include <unistd.h> | ||
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static int | ||
elf_debug_sections(Elf *e) { | ||
Elf_Scn *scn=NULL; | ||
GElf_Shdr shdr; | ||
size_t n, shstrndx, sz; | ||
char *name; | ||
int has_debug=0; | ||
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if (elf_getshdrstrndx(e, &shstrndx) != 0) | ||
errx(EX_SOFTWARE, "elf_getshdrstrndx() failed : %s . " , elf_errmsg(-1)); | ||
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while ((scn = elf_nextscn(e, scn)) != NULL) { | ||
gelf_getshdr(scn, &shdr); | ||
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name = elf_strptr(e, shstrndx, shdr.sh_name); | ||
if (!strstr(name, "debug_")) | ||
continue; | ||
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has_debug++; | ||
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} | ||
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return (has_debug > 0); | ||
} | ||
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int main(int argc, char *argv[]) { | ||
int fd, rc; | ||
Elf *e; | ||
int has_debug; | ||
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if (elf_version(EV_CURRENT) == EV_NONE ) | ||
errx(EX_SOFTWARE, "ELF library initialization failed : %s ", elf_errmsg(-1)); | ||
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if ((fd =open(argv [1], O_RDONLY , 0)) < 0) | ||
err(EX_NOINPUT,"open %s failed ", argv [1]); | ||
if ((e = elf_begin(fd, ELF_C_READ , NULL)) == NULL) | ||
errx(EX_SOFTWARE, "elf_begin () failed : %s . ", elf_errmsg(-1)); | ||
if (elf_kind(e) != ELF_K_ELF) | ||
errx(EX_DATAERR, "%s is not an ELF object . ", argv[1]); | ||
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has_debug=elf_debug_sections(e); | ||
printf(has_debug ? "HAS DEBUG\n" : "NO DEBUG\n"); | ||
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rc=close(fd); | ||
rc=elf_end(e); | ||
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return (rc); | ||
} |