| 1 | /** |
| 2 | * Tool utility functions |
| 3 | * |
| 4 | * Copyright (c) 2014 Red Hat <pmoore@redhat.com> |
| 5 | * Author: Paul Moore <paul@paul-moore.com> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of version 2.1 of the GNU Lesser General Public License as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 16 | * for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public License |
| 19 | * along with this library; if not, see <http://www.gnu.org/licenses>. |
| 20 | */ |
| 21 | |
| 22 | #include <errno.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <stdio.h> |
| 25 | #include <linux/audit.h> |
| 26 | |
| 27 | #ifndef _BSD_SOURCE |
| 28 | #define _BSD_SOURCE |
| 29 | #endif |
| 30 | #include <endian.h> |
| 31 | |
| 32 | #include "util.h" |
| 33 | |
| 34 | /* determine the native architecture */ |
| 35 | #if __i386__ |
| 36 | #define ARCH_NATIVE AUDIT_ARCH_I386 |
| 37 | #elif __x86_64__ |
| 38 | #ifdef __ILP32__ |
| 39 | #define ARCH_NATIVE AUDIT_ARCH_X86_64 |
| 40 | #else |
| 41 | #define ARCH_NATIVE AUDIT_ARCH_X86_64 |
| 42 | #endif /* __ILP32__ */ |
| 43 | #elif __arm__ |
| 44 | #define ARCH_NATIVE AUDIT_ARCH_ARM |
| 45 | #elif __aarch64__ |
| 46 | #define ARCH_NATIVE AUDIT_ARCH_AARCH64 |
| 47 | #elif __mips__ && _MIPS_SIM == _MIPS_SIM_ABI32 |
| 48 | #if __MIPSEB__ |
| 49 | #define ARCH_NATIVE AUDIT_ARCH_MIPS |
| 50 | #elif __MIPSEL__ |
| 51 | #define ARCH_NATIVE AUDIT_ARCH_MIPSEL |
| 52 | #endif /* _MIPS_SIM_ABI32 */ |
| 53 | #elif __mips__ && _MIPS_SIM == _MIPS_SIM_ABI64 |
| 54 | #if __MIPSEB__ |
| 55 | #define ARCH_NATIVE AUDIT_ARCH_MIPS64 |
| 56 | #elif __MIPSEL__ |
| 57 | #define ARCH_NATIVE AUDIT_ARCH_MIPSEL64 |
| 58 | #endif /* _MIPS_SIM_ABI64 */ |
| 59 | #elif __mips__ && _MIPS_SIM == _MIPS_SIM_NABI32 |
| 60 | #if __MIPSEB__ |
| 61 | #define ARCH_NATIVE AUDIT_ARCH_MIPS64N32 |
| 62 | #elif __MIPSEL__ |
| 63 | #define ARCH_NATIVE AUDIT_ARCH_MIPSEL64N32 |
| 64 | #endif /* _MIPS_SIM_NABI32 */ |
| 65 | #elif __PPC64__ |
| 66 | #ifdef __BIG_ENDIAN__ |
| 67 | #define ARCH_NATIVE AUDIT_ARCH_PPC64 |
| 68 | #else |
| 69 | #define ARCH_NATIVE AUDIT_ARCH_PPC64LE |
| 70 | #endif |
| 71 | #elif __PPC__ |
| 72 | #define ARCH_NATIVE AUDIT_ARCH_PPC |
| 73 | #elif __s390x__ /* s390x must be checked before s390 */ |
| 74 | #define ARCH_NATIVE AUDIT_ARCH_S390X |
| 75 | #elif __s390__ |
| 76 | #define ARCH_NATIVE AUDIT_ARCH_S390 |
| 77 | #else |
| 78 | #error the simulator code needs to know about your machine type |
| 79 | #endif |
| 80 | |
| 81 | /* default to the native arch */ |
| 82 | uint32_t arch = ARCH_NATIVE; |
| 83 | |
| 84 | /** |
| 85 | * Convert a 16-bit target integer into the host's endianess |
| 86 | * @param arch the architecture token |
| 87 | * @param val the 16-bit integer |
| 88 | * |
| 89 | * Convert the endianess of the supplied value and return it to the caller. |
| 90 | * |
| 91 | */ |
| 92 | uint16_t ttoh16(uint32_t arch, uint16_t val) |
| 93 | { |
| 94 | if (arch & __AUDIT_ARCH_LE) |
| 95 | return le16toh(val); |
| 96 | else |
| 97 | return be16toh(val); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Convert a 32-bit target integer into the host's endianess |
| 102 | * @param arch the architecture token |
| 103 | * @param val the 32-bit integer |
| 104 | * |
| 105 | * Convert the endianess of the supplied value and return it to the caller. |
| 106 | * |
| 107 | */ |
| 108 | uint32_t ttoh32(uint32_t arch, uint32_t val) |
| 109 | { |
| 110 | if (arch & __AUDIT_ARCH_LE) |
| 111 | return le32toh(val); |
| 112 | else |
| 113 | return be32toh(val); |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Convert a 32-bit host integer into the target's endianess |
| 118 | * @param arch the architecture token |
| 119 | * @param val the 32-bit integer |
| 120 | * |
| 121 | * Convert the endianess of the supplied value and return it to the caller. |
| 122 | * |
| 123 | */ |
| 124 | uint32_t htot32(uint32_t arch, uint32_t val) |
| 125 | { |
| 126 | if (arch & __AUDIT_ARCH_LE) |
| 127 | return htole32(val); |
| 128 | else |
| 129 | return htobe32(val); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Convert a 64-bit host integer into the target's endianess |
| 134 | * @param arch the architecture token |
| 135 | * @param val the 64-bit integer |
| 136 | * |
| 137 | * Convert the endianess of the supplied value and return it to the caller. |
| 138 | * |
| 139 | */ |
| 140 | uint64_t htot64(uint32_t arch, uint64_t val) |
| 141 | { |
| 142 | if (arch & __AUDIT_ARCH_LE) |
| 143 | return htole64(val); |
| 144 | else |
| 145 | return htobe64(val); |
| 146 | } |