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/**
* Tool utility functions
*
* Copyright (c) 2014 Red Hat <pmoore@redhat.com>
* Author: Paul Moore <pmoore@redhat.com>
*/
/*
* This library is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License as
* published by the Free Software Foundation.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, see <http://www.gnu.org/licenses>.
*/
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <linux/audit.h>
#ifndef _BSD_SOURCE
#define _BSD_SOURCE
#endif
#include <endian.h>
#include "util.h"
/* determine the native architecture */
#if __i386__
#define ARCH_NATIVE AUDIT_ARCH_I386
#elif __x86_64__
#ifdef __ILP32__
#define ARCH_NATIVE AUDIT_ARCH_X86_64
#else
#define ARCH_NATIVE AUDIT_ARCH_X86_64
#endif /* __ILP32__ */
#elif __arm__
#define ARCH_NATIVE AUDIT_ARCH_ARM
#elif __aarch64__
#define ARCH_NATIVE AUDIT_ARCH_AARCH64
#elif __mips__ && _MIPS_SIM == _MIPS_SIM_ABI32
#if __MIPSEB__
#define ARCH_NATIVE AUDIT_ARCH_MIPS
#elif __MIPSEL__
#define ARCH_NATIVE AUDIT_ARCH_MIPSEL
#endif /* _MIPS_SIM_ABI32 */
#elif __mips__ && _MIPS_SIM == _MIPS_SIM_ABI64
#if __MIPSEB__
#define ARCH_NATIVE AUDIT_ARCH_MIPS64
#elif __MIPSEL__
#define ARCH_NATIVE AUDIT_ARCH_MIPSEL64
#endif /* _MIPS_SIM_ABI64 */
#elif __mips__ && _MIPS_SIM == _MIPS_SIM_NABI32
#if __MIPSEB__
#define ARCH_NATIVE AUDIT_ARCH_MIPS64N32
#elif __MIPSEL__
#define ARCH_NATIVE AUDIT_ARCH_MIPSEL64N32
#endif /* _MIPS_SIM_NABI32 */
#elif __s390__
#define ARCH_NATIVE AUDIT_ARCH_S390
#elif __s390x__
#define ARCH_NATIVE AUDIT_ARCH_S390X
#else
#error the simulator code needs to know about your machine type
#endif
/* default to the native arch */
uint32_t arch = ARCH_NATIVE;
/**
* Print the usage information to stderr and exit
* @param program the name of the current program being invoked
*
* Print the usage information and exit with EINVAL.
*
*/
void exit_usage(const char *program)
{
fprintf(stderr,
"usage: %s -f <bpf_file> [-v]"
" -a <arch> -s <syscall_num> [-0 <a0>] ... [-5 <a5>]\n",
program);
exit(EINVAL);
}
/**
* Convert a 16-bit target integer into the host's endianess
* @param arch the architecture token
* @param val the 16-bit integer
*
* Convert the endianess of the supplied value and return it to the caller.
*
*/
uint16_t ttoh16(uint32_t arch, uint16_t val)
{
if (arch & __AUDIT_ARCH_LE)
return le16toh(val);
else
return be16toh(val);
}
/**
* Convert a 32-bit target integer into the host's endianess
* @param arch the architecture token
* @param val the 32-bit integer
*
* Convert the endianess of the supplied value and return it to the caller.
*
*/
uint32_t ttoh32(uint32_t arch, uint32_t val)
{
if (arch & __AUDIT_ARCH_LE)
return le32toh(val);
else
return be32toh(val);
}
/**
* Convert a 32-bit host integer into the target's endianess
* @param arch the architecture token
* @param val the 32-bit integer
*
* Convert the endianess of the supplied value and return it to the caller.
*
*/
uint32_t htot32(uint32_t arch, uint32_t val)
{
if (arch & __AUDIT_ARCH_LE)
return htole32(val);
else
return htobe32(val);
}
/**
* Convert a 64-bit host integer into the target's endianess
* @param arch the architecture token
* @param val the 64-bit integer
*
* Convert the endianess of the supplied value and return it to the caller.
*
*/
uint64_t htot64(uint32_t arch, uint64_t val)
{
if (arch & __AUDIT_ARCH_LE)
return htole64(val);
else
return htobe64(val);
}
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