1 2 /*--------------------------------------------------------------------*/ 3 /*--- Misc simple stuff lacking a better home. misc.c ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2008-2013 OpenWorks LLP 11 info (at) open-works.co.uk 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 30 Neither the names of the U.S. Department of Energy nor the 31 University of California nor the names of its contributors may be 32 used to endorse or promote products derived from this software 33 without prior written permission. 34 */ 35 36 #include "pub_core_basics.h" 37 #include "pub_core_libcbase.h" 38 #include "pub_core_libcassert.h" 39 #include "pub_core_mallocfree.h" 40 #include "pub_core_xarray.h" 41 42 #include "priv_misc.h" /* self */ 43 44 45 void* ML_(dinfo_zalloc) ( const HChar* cc, SizeT szB ) { 46 void* v; 47 vg_assert(szB > 0); 48 v = VG_(arena_malloc)( VG_AR_DINFO, cc, szB ); 49 vg_assert(v); 50 VG_(memset)(v, 0, szB); 51 return v; 52 } 53 54 void ML_(dinfo_free) ( void* v ) { 55 VG_(arena_free)( VG_AR_DINFO, v ); 56 } 57 58 HChar* ML_(dinfo_strdup) ( const HChar* cc, const HChar* str ) { 59 return VG_(arena_strdup)( VG_AR_DINFO, cc, str ); 60 } 61 62 void* ML_(dinfo_memdup) ( const HChar* cc, void* str, SizeT nStr ) { 63 void* dst = VG_(arena_malloc)( VG_AR_DINFO, cc, nStr ); 64 tl_assert(dst); 65 VG_(memcpy)(dst, str, nStr); 66 return dst; 67 } 68 69 static inline Bool host_is_little_endian ( void ) { 70 UInt x = 0x76543210; 71 UChar* p = (UChar*)(&x); 72 return toBool(*p == 0x10); 73 } 74 75 Short ML_(read_Short)( UChar* data ) { 76 Short r = 0; 77 if (host_is_little_endian()) { 78 r = data[0] 79 | ( ((UInt)data[1]) << 8 ); 80 } else { 81 r = data[1] 82 | ( ((UInt)data[0]) << 8 ); 83 } 84 return r; 85 } 86 87 Int ML_(read_Int) ( UChar* data ) { 88 Int r = 0; 89 if (host_is_little_endian()) { 90 r = data[0] 91 | ( ((UInt)data[1]) << 8 ) 92 | ( ((UInt)data[2]) << 16 ) 93 | ( ((UInt)data[3]) << 24 ); 94 } else { 95 r = data[3] 96 | ( ((UInt)data[2]) << 8 ) 97 | ( ((UInt)data[1]) << 16 ) 98 | ( ((UInt)data[0]) << 24 ); 99 } 100 return r; 101 } 102 103 Long ML_(read_Long) ( UChar* data ) { 104 Long r = 0; 105 if (host_is_little_endian()) { 106 r = data[0] 107 | ( ((ULong)data[1]) << 8 ) 108 | ( ((ULong)data[2]) << 16 ) 109 | ( ((ULong)data[3]) << 24 ) 110 | ( ((ULong)data[4]) << 32 ) 111 | ( ((ULong)data[5]) << 40 ) 112 | ( ((ULong)data[6]) << 48 ) 113 | ( ((ULong)data[7]) << 56 ); 114 } else { 115 r = data[7] 116 | ( ((ULong)data[6]) << 8 ) 117 | ( ((ULong)data[5]) << 16 ) 118 | ( ((ULong)data[4]) << 24 ) 119 | ( ((ULong)data[3]) << 32 ) 120 | ( ((ULong)data[2]) << 40 ) 121 | ( ((ULong)data[1]) << 48 ) 122 | ( ((ULong)data[0]) << 56 ); 123 } 124 return r; 125 } 126 127 UShort ML_(read_UShort) ( UChar* data ) { 128 UInt r = 0; 129 if (host_is_little_endian()) { 130 r = data[0] 131 | ( ((UInt)data[1]) << 8 ); 132 } else { 133 r = data[1] 134 | ( ((UInt)data[0]) << 8 ); 135 } 136 return r; 137 } 138 139 UChar *ML_(write_UShort) ( UChar* ptr, UShort val ) { 140 if (host_is_little_endian()) { 141 ptr[0] = val & 0xff; 142 ptr[1] = ( val >> 8 ) & 0xff; 143 } else { 144 ptr[0] = ( val >> 8 ) & 0xff; 145 ptr[1] = val & 0xff; 146 } 147 return ptr + sizeof(UShort); 148 } 149 150 UWord ML_(read_UWord) ( UChar* data ) { 151 if (sizeof(UWord) == sizeof(UInt)) { 152 return ML_(read_UInt)(data); 153 } else if (sizeof(UWord) == sizeof(ULong)) { 154 return ML_(read_ULong)(data); 155 } else { 156 vg_assert(0); 157 } 158 } 159 160 UInt ML_(read_UInt) ( UChar* data ) { 161 UInt r = 0; 162 if (host_is_little_endian()) { 163 r = data[0] 164 | ( ((UInt)data[1]) << 8 ) 165 | ( ((UInt)data[2]) << 16 ) 166 | ( ((UInt)data[3]) << 24 ); 167 } else { 168 r = data[3] 169 | ( ((UInt)data[2]) << 8 ) 170 | ( ((UInt)data[1]) << 16 ) 171 | ( ((UInt)data[0]) << 24 ); 172 } 173 return r; 174 } 175 176 UChar* ML_(write_UInt) ( UChar* ptr, UInt val ) { 177 if (host_is_little_endian()) { 178 ptr[0] = val & 0xff; 179 ptr[1] = ( val >> 8 ) & 0xff; 180 ptr[2] = ( val >> 16 ) & 0xff; 181 ptr[3] = ( val >> 24 ) & 0xff; 182 } else { 183 ptr[0] = ( val >> 24 ) & 0xff; 184 ptr[1] = ( val >> 16 ) & 0xff; 185 ptr[2] = ( val >> 8 ) & 0xff; 186 ptr[3] = val & 0xff; 187 } 188 return ptr + sizeof(UInt); 189 } 190 191 ULong ML_(read_ULong) ( UChar* data ) { 192 ULong r = 0; 193 if (host_is_little_endian()) { 194 r = data[0] 195 | ( ((ULong)data[1]) << 8 ) 196 | ( ((ULong)data[2]) << 16 ) 197 | ( ((ULong)data[3]) << 24 ) 198 | ( ((ULong)data[4]) << 32 ) 199 | ( ((ULong)data[5]) << 40 ) 200 | ( ((ULong)data[6]) << 48 ) 201 | ( ((ULong)data[7]) << 56 ); 202 } else { 203 r = data[7] 204 | ( ((ULong)data[6]) << 8 ) 205 | ( ((ULong)data[5]) << 16 ) 206 | ( ((ULong)data[4]) << 24 ) 207 | ( ((ULong)data[3]) << 32 ) 208 | ( ((ULong)data[2]) << 40 ) 209 | ( ((ULong)data[1]) << 48 ) 210 | ( ((ULong)data[0]) << 56 ); 211 } 212 return r; 213 } 214 215 UChar* ML_(write_ULong) ( UChar* ptr, ULong val ) { 216 if (host_is_little_endian()) { 217 ptr[0] = val & 0xff; 218 ptr[1] = ( val >> 8 ) & 0xff; 219 ptr[2] = ( val >> 16 ) & 0xff; 220 ptr[3] = ( val >> 24 ) & 0xff; 221 ptr[4] = ( val >> 32 ) & 0xff; 222 ptr[5] = ( val >> 40 ) & 0xff; 223 ptr[6] = ( val >> 48 ) & 0xff; 224 ptr[7] = ( val >> 56 ) & 0xff; 225 } else { 226 ptr[0] = ( val >> 56 ) & 0xff; 227 ptr[1] = ( val >> 48 ) & 0xff; 228 ptr[2] = ( val >> 40 ) & 0xff; 229 ptr[3] = ( val >> 32 ) & 0xff; 230 ptr[4] = ( val >> 24 ) & 0xff; 231 ptr[5] = ( val >> 16 ) & 0xff; 232 ptr[6] = ( val >> 8 ) & 0xff; 233 ptr[7] = val & 0xff; 234 } 235 return ptr + sizeof(ULong); 236 } 237 238 UChar ML_(read_UChar) ( UChar* data ) { 239 return data[0]; 240 } 241 242 UChar* ML_(write_UChar) ( UChar* ptr, UChar val ) { 243 ptr[0] = val; 244 return ptr + sizeof(UChar); 245 } 246 247 Addr ML_(read_Addr) ( UChar* data ) { 248 if (sizeof(Addr) == sizeof(UInt)) { 249 return ML_(read_UInt)(data); 250 } else if (sizeof(Addr) == sizeof(ULong)) { 251 return ML_(read_ULong)(data); 252 } else { 253 vg_assert(0); 254 } 255 } 256 257 UChar* ML_(write_Addr) ( UChar* ptr, Addr val ) { 258 if (sizeof(Addr) == sizeof(UInt)) { 259 return ML_(write_UInt)(ptr, val); 260 } else if (sizeof(Addr) == sizeof(ULong)) { 261 return ML_(write_ULong)(ptr, val); 262 } else { 263 vg_assert(0); 264 } 265 } 266 267 268 /*--------------------------------------------------------------------*/ 269 /*--- end misc.c ---*/ 270 /*--------------------------------------------------------------------*/ 271