sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- A minimal setjmp/longjmp implementation. m_libcsetjmp.c ---*/ |
| 4 | /*--------------------------------------------------------------------*/ |
| 5 | |
| 6 | /* |
| 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
| 9 | |
sewardj | b3a1e4b | 2015-08-21 11:32:26 +0000 | [diff] [blame] | 10 | Copyright (C) 2010-2015 Mozilla Inc |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 11 | |
| 12 | This program is free software; you can redistribute it and/or |
| 13 | modify it under the terms of the GNU General Public License as |
| 14 | published by the Free Software Foundation; either version 2 of the |
| 15 | License, or (at your option) any later version. |
| 16 | |
| 17 | This program is distributed in the hope that it will be useful, but |
| 18 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | General Public License for more details. |
| 21 | |
| 22 | You should have received a copy of the GNU General Public License |
| 23 | along with this program; if not, write to the Free Software |
| 24 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 25 | 02111-1307, USA. |
| 26 | |
| 27 | The GNU General Public License is contained in the file COPYING. |
| 28 | */ |
| 29 | |
| 30 | /* Contributed by Julian Seward <jseward@acm.org> */ |
| 31 | |
| 32 | |
| 33 | #include "pub_core_basics.h" |
| 34 | #include "pub_core_libcsetjmp.h" /* self */ |
| 35 | |
| 36 | |
| 37 | /* See include/pub_tool_libcsetjmp.h for background and rationale. */ |
| 38 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 39 | /* The alternative implementations are for ppc{32,64}-linux and |
| 40 | {amd64,x86}-{linux,darwin}. See #259977. That leaves only |
| 41 | {arm,s390x}-linux using the gcc builtins now. |
| 42 | */ |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 43 | |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 44 | /* ------------ ppc32-linux ------------ */ |
| 45 | |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 46 | #if defined(VGP_ppc32_linux) |
| 47 | |
| 48 | __asm__( |
| 49 | ".text" "\n" |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 50 | "" "\n" |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 51 | ".global VG_MINIMAL_SETJMP" "\n" // r3 = jmp_buf |
| 52 | "VG_MINIMAL_SETJMP:" "\n" |
| 53 | " stw 0, 0(3)" "\n" |
| 54 | " stw 1, 4(3)" "\n" |
| 55 | " stw 2, 8(3)" "\n" |
| 56 | " stw 3, 12(3)" "\n" |
| 57 | " stw 4, 16(3)" "\n" |
| 58 | " stw 5, 20(3)" "\n" |
| 59 | " stw 6, 24(3)" "\n" |
| 60 | " stw 7, 28(3)" "\n" |
| 61 | " stw 8, 32(3)" "\n" |
| 62 | " stw 9, 36(3)" "\n" |
| 63 | " stw 10, 40(3)" "\n" |
| 64 | " stw 11, 44(3)" "\n" |
| 65 | " stw 12, 48(3)" "\n" |
| 66 | " stw 13, 52(3)" "\n" |
| 67 | " stw 14, 56(3)" "\n" |
| 68 | " stw 15, 60(3)" "\n" |
| 69 | " stw 16, 64(3)" "\n" |
| 70 | " stw 17, 68(3)" "\n" |
| 71 | " stw 18, 72(3)" "\n" |
| 72 | " stw 19, 76(3)" "\n" |
| 73 | " stw 20, 80(3)" "\n" |
| 74 | " stw 21, 84(3)" "\n" |
| 75 | " stw 22, 88(3)" "\n" |
| 76 | " stw 23, 92(3)" "\n" |
| 77 | " stw 24, 96(3)" "\n" |
| 78 | " stw 25, 100(3)" "\n" |
| 79 | " stw 26, 104(3)" "\n" |
| 80 | " stw 27, 108(3)" "\n" |
| 81 | " stw 28, 112(3)" "\n" |
| 82 | " stw 29, 116(3)" "\n" |
| 83 | " stw 30, 120(3)" "\n" |
| 84 | " stw 31, 124(3)" "\n" |
| 85 | // must use a caller-save register here as scratch, hence r4 |
| 86 | " mflr 4" "\n" |
| 87 | " stw 4, 128(3)" "\n" |
| 88 | " mfcr 4" "\n" |
| 89 | " stw 4, 132(3)" "\n" |
| 90 | " li 3, 0" "\n" |
| 91 | " blr" "\n" |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 92 | "" "\n" |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 93 | |
| 94 | |
| 95 | ".global VG_MINIMAL_LONGJMP" "\n" |
| 96 | "VG_MINIMAL_LONGJMP:" "\n" // r3 = jmp_buf |
| 97 | // do r4 = 1 |
| 98 | // and park it in the restore slot for r3 (the ret reg) |
| 99 | " li 4, 1" "\n" |
| 100 | " stw 4, 12(3)" "\n" |
| 101 | // restore everything except r3 |
| 102 | // then r3 last of all |
| 103 | // then blr |
| 104 | " lwz 0, 128(3)" "\n" |
| 105 | " mtlr 0" "\n" |
| 106 | " lwz 0, 132(3)" "\n" |
| 107 | " mtcr 0" "\n" |
| 108 | " lwz 0, 0(3)" "\n" |
| 109 | " lwz 1, 4(3)" "\n" |
| 110 | " lwz 2, 8(3)" "\n" |
| 111 | // r3 is done at the end |
| 112 | " lwz 4, 16(3)" "\n" |
| 113 | " lwz 5, 20(3)" "\n" |
| 114 | " lwz 6, 24(3)" "\n" |
| 115 | " lwz 7, 28(3)" "\n" |
| 116 | " lwz 8, 32(3)" "\n" |
| 117 | " lwz 9, 36(3)" "\n" |
| 118 | " lwz 10, 40(3)" "\n" |
| 119 | " lwz 11, 44(3)" "\n" |
| 120 | " lwz 12, 48(3)" "\n" |
| 121 | " lwz 13, 52(3)" "\n" |
| 122 | " lwz 14, 56(3)" "\n" |
| 123 | " lwz 15, 60(3)" "\n" |
| 124 | " lwz 16, 64(3)" "\n" |
| 125 | " lwz 17, 68(3)" "\n" |
| 126 | " lwz 18, 72(3)" "\n" |
| 127 | " lwz 19, 76(3)" "\n" |
| 128 | " lwz 20, 80(3)" "\n" |
| 129 | " lwz 21, 84(3)" "\n" |
| 130 | " lwz 22, 88(3)" "\n" |
| 131 | " lwz 23, 92(3)" "\n" |
| 132 | " lwz 24, 96(3)" "\n" |
| 133 | " lwz 25, 100(3)" "\n" |
| 134 | " lwz 26, 104(3)" "\n" |
| 135 | " lwz 27, 108(3)" "\n" |
| 136 | " lwz 28, 112(3)" "\n" |
| 137 | " lwz 29, 116(3)" "\n" |
| 138 | " lwz 30, 120(3)" "\n" |
| 139 | " lwz 31, 124(3)" "\n" |
| 140 | " lwz 3, 12(3)" "\n" |
| 141 | " blr" "\n" |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 142 | "" "\n" |
sewardj | 97d3ebb | 2011-04-11 18:36:34 +0000 | [diff] [blame] | 143 | |
| 144 | ".previous" "\n" |
| 145 | ); |
| 146 | |
| 147 | #endif /* VGP_ppc32_linux */ |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 148 | |
| 149 | |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 150 | /* ------------ ppc64-linux ------------ */ |
| 151 | |
carll | cae0cc2 | 2014-08-07 23:17:29 +0000 | [diff] [blame] | 152 | #if defined(VGP_ppc64be_linux) |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 153 | |
| 154 | __asm__( |
| 155 | ".section \".toc\",\"aw\"" "\n" |
| 156 | |
| 157 | ".section \".text\"" "\n" |
| 158 | ".align 2" "\n" |
| 159 | ".p2align 4,,15" "\n" |
| 160 | ".globl VG_MINIMAL_SETJMP" "\n" |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 161 | ".section \".opd\",\"aw\"" "\n" |
| 162 | ".align 3" "\n" |
| 163 | "VG_MINIMAL_SETJMP:" "\n" |
| 164 | ".quad .L.VG_MINIMAL_SETJMP,.TOC.@tocbase,0" "\n" |
| 165 | ".previous" "\n" |
| 166 | |
| 167 | ".type VG_MINIMAL_SETJMP, @function" "\n" |
| 168 | ".L.VG_MINIMAL_SETJMP:" "\n" |
| 169 | " std 0, 0(3)" "\n" |
| 170 | " std 1, 8(3)" "\n" |
| 171 | " std 2, 16(3)" "\n" |
| 172 | " std 3, 24(3)" "\n" |
| 173 | " std 4, 32(3)" "\n" |
| 174 | " std 5, 40(3)" "\n" |
| 175 | " std 6, 48(3)" "\n" |
| 176 | " std 7, 56(3)" "\n" |
| 177 | " std 8, 64(3)" "\n" |
| 178 | " std 9, 72(3)" "\n" |
| 179 | " std 10, 80(3)" "\n" |
| 180 | " std 11, 88(3)" "\n" |
| 181 | " std 12, 96(3)" "\n" |
| 182 | " std 13, 104(3)" "\n" |
| 183 | " std 14, 112(3)" "\n" |
| 184 | " std 15, 120(3)" "\n" |
| 185 | " std 16, 128(3)" "\n" |
| 186 | " std 17, 136(3)" "\n" |
| 187 | " std 18, 144(3)" "\n" |
| 188 | " std 19, 152(3)" "\n" |
| 189 | " std 20, 160(3)" "\n" |
| 190 | " std 21, 168(3)" "\n" |
| 191 | " std 22, 176(3)" "\n" |
| 192 | " std 23, 184(3)" "\n" |
| 193 | " std 24, 192(3)" "\n" |
| 194 | " std 25, 200(3)" "\n" |
| 195 | " std 26, 208(3)" "\n" |
| 196 | " std 27, 216(3)" "\n" |
| 197 | " std 28, 224(3)" "\n" |
| 198 | " std 29, 232(3)" "\n" |
| 199 | " std 30, 240(3)" "\n" |
| 200 | " std 31, 248(3)" "\n" |
| 201 | // must use a caller-save register here as scratch, hence r4 |
| 202 | " mflr 4" "\n" |
| 203 | " std 4, 256(3)" "\n" |
| 204 | " mfcr 4" "\n" |
| 205 | " std 4, 264(3)" "\n" |
| 206 | " li 3, 0" "\n" |
| 207 | " blr" "\n" |
| 208 | "" "\n" |
| 209 | |
| 210 | |
| 211 | ".globl VG_MINIMAL_LONGJMP" "\n" |
| 212 | |
| 213 | ".section \".opd\",\"aw\"" "\n" |
| 214 | ".align 3" "\n" |
| 215 | "VG_MINIMAL_LONGJMP:" "\n" |
| 216 | ".quad .L.VG_MINIMAL_LONGJMP,.TOC.@tocbase,0" "\n" |
| 217 | ".previous" "\n" |
| 218 | |
| 219 | ".type VG_MINIMAL_LONGJMP, @function" "\n" |
| 220 | ".L.VG_MINIMAL_LONGJMP:" "\n" |
| 221 | // do r4 = 1 |
| 222 | // and park it in the restore slot for r3 (the ret reg) |
| 223 | " li 4, 1" "\n" |
| 224 | " std 4, 24(3)" "\n" |
| 225 | // restore everything except r3 |
| 226 | // then r3 last of all |
| 227 | // then blr |
| 228 | " ld 0, 256(3)" "\n" |
| 229 | " mtlr 0" "\n" |
| 230 | " ld 0, 264(3)" "\n" |
| 231 | " mtcr 0" "\n" |
| 232 | " ld 0, 0(3)" "\n" |
| 233 | " ld 1, 8(3)" "\n" |
| 234 | " ld 2, 16(3)" "\n" |
| 235 | // r3 is done at the end |
| 236 | " ld 4, 32(3)" "\n" |
| 237 | " ld 5, 40(3)" "\n" |
| 238 | " ld 6, 48(3)" "\n" |
| 239 | " ld 7, 56(3)" "\n" |
| 240 | " ld 8, 64(3)" "\n" |
| 241 | " ld 9, 72(3)" "\n" |
| 242 | " ld 10, 80(3)" "\n" |
| 243 | " ld 11, 88(3)" "\n" |
| 244 | " ld 12, 96(3)" "\n" |
| 245 | " ld 13, 104(3)" "\n" |
| 246 | " ld 14, 112(3)" "\n" |
| 247 | " ld 15, 120(3)" "\n" |
| 248 | " ld 16, 128(3)" "\n" |
| 249 | " ld 17, 136(3)" "\n" |
| 250 | " ld 18, 144(3)" "\n" |
| 251 | " ld 19, 152(3)" "\n" |
| 252 | " ld 20, 160(3)" "\n" |
| 253 | " ld 21, 168(3)" "\n" |
| 254 | " ld 22, 176(3)" "\n" |
| 255 | " ld 23, 184(3)" "\n" |
| 256 | " ld 24, 192(3)" "\n" |
| 257 | " ld 25, 200(3)" "\n" |
| 258 | " ld 26, 208(3)" "\n" |
| 259 | " ld 27, 216(3)" "\n" |
| 260 | " ld 28, 224(3)" "\n" |
| 261 | " ld 29, 232(3)" "\n" |
| 262 | " ld 30, 240(3)" "\n" |
| 263 | " ld 31, 248(3)" "\n" |
| 264 | " ld 3, 24(3)" "\n" |
| 265 | " blr" "\n" |
| 266 | "" "\n" |
| 267 | |
| 268 | ".previous" "\n" |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 269 | ); |
| 270 | |
carll | 582d582 | 2014-08-07 23:35:54 +0000 | [diff] [blame] | 271 | #elif defined(VGP_ppc64le_linux) |
| 272 | __asm__( |
| 273 | ".section \".toc\",\"aw\"" "\n" |
| 274 | |
| 275 | ".section \".text\"" "\n" |
| 276 | ".align 2" "\n" |
| 277 | ".p2align 4,,15" "\n" |
| 278 | ".globl VG_MINIMAL_SETJMP" "\n" |
| 279 | ".type VG_MINIMAL_SETJMP,@function" "\n" |
| 280 | "VG_MINIMAL_SETJMP:" "\n" |
| 281 | " .localentry VG_MINIMAL_SETJMP, .-VG_MINIMAL_SETJMP" "\n" |
| 282 | " std 0, 0(3)" "\n" |
| 283 | " std 1, 8(3)" "\n" |
| 284 | " std 2, 16(3)" "\n" |
| 285 | " std 3, 24(3)" "\n" |
| 286 | " std 4, 32(3)" "\n" |
| 287 | " std 5, 40(3)" "\n" |
| 288 | " std 6, 48(3)" "\n" |
| 289 | " std 7, 56(3)" "\n" |
| 290 | " std 8, 64(3)" "\n" |
| 291 | " std 9, 72(3)" "\n" |
| 292 | " std 10, 80(3)" "\n" |
| 293 | " std 11, 88(3)" "\n" |
| 294 | " std 12, 96(3)" "\n" |
| 295 | " std 13, 104(3)" "\n" |
| 296 | " std 14, 112(3)" "\n" |
| 297 | " std 15, 120(3)" "\n" |
| 298 | " std 16, 128(3)" "\n" |
| 299 | " std 17, 136(3)" "\n" |
| 300 | " std 18, 144(3)" "\n" |
| 301 | " std 19, 152(3)" "\n" |
| 302 | " std 20, 160(3)" "\n" |
| 303 | " std 21, 168(3)" "\n" |
| 304 | " std 22, 176(3)" "\n" |
| 305 | " std 23, 184(3)" "\n" |
| 306 | " std 24, 192(3)" "\n" |
| 307 | " std 25, 200(3)" "\n" |
| 308 | " std 26, 208(3)" "\n" |
| 309 | " std 27, 216(3)" "\n" |
| 310 | " std 28, 224(3)" "\n" |
| 311 | " std 29, 232(3)" "\n" |
| 312 | " std 30, 240(3)" "\n" |
| 313 | " std 31, 248(3)" "\n" |
| 314 | // must use a caller-save register here as scratch, hence r4 |
| 315 | " mflr 4" "\n" |
| 316 | " std 4, 256(3)" "\n" |
| 317 | " mfcr 4" "\n" |
| 318 | " std 4, 264(3)" "\n" |
| 319 | " li 3, 0" "\n" |
| 320 | " blr" "\n" |
| 321 | "" "\n" |
| 322 | |
| 323 | |
| 324 | ".globl VG_MINIMAL_LONGJMP" "\n" |
| 325 | ".type VG_MINIMAL_LONGJMP, @function" "\n" |
| 326 | "VG_MINIMAL_LONGJMP:" "\n" |
| 327 | " .localentry VG_MINIMAL_LONGJMP, .-VG_MINIMAL_LONGJMP" "\n" |
| 328 | // do r4 = 1 |
| 329 | // and park it in the restore slot for r3 (the ret reg) |
| 330 | " li 4, 1" "\n" |
| 331 | " std 4, 24(3)" "\n" |
| 332 | // restore everything except r3 |
| 333 | // then r3 last of all |
| 334 | // then blr |
| 335 | " ld 0, 256(3)" "\n" |
| 336 | " mtlr 0" "\n" |
| 337 | " ld 0, 264(3)" "\n" |
| 338 | " mtcr 0" "\n" |
| 339 | " ld 0, 0(3)" "\n" |
| 340 | " ld 1, 8(3)" "\n" |
| 341 | " ld 2, 16(3)" "\n" |
| 342 | // r3 is done at the end |
| 343 | " ld 4, 32(3)" "\n" |
| 344 | " ld 5, 40(3)" "\n" |
| 345 | " ld 6, 48(3)" "\n" |
| 346 | " ld 7, 56(3)" "\n" |
| 347 | " ld 8, 64(3)" "\n" |
| 348 | " ld 9, 72(3)" "\n" |
| 349 | " ld 10, 80(3)" "\n" |
| 350 | " ld 11, 88(3)" "\n" |
| 351 | " ld 12, 96(3)" "\n" |
| 352 | " ld 13, 104(3)" "\n" |
| 353 | " ld 14, 112(3)" "\n" |
| 354 | " ld 15, 120(3)" "\n" |
| 355 | " ld 16, 128(3)" "\n" |
| 356 | " ld 17, 136(3)" "\n" |
| 357 | " ld 18, 144(3)" "\n" |
| 358 | " ld 19, 152(3)" "\n" |
| 359 | " ld 20, 160(3)" "\n" |
| 360 | " ld 21, 168(3)" "\n" |
| 361 | " ld 22, 176(3)" "\n" |
| 362 | " ld 23, 184(3)" "\n" |
| 363 | " ld 24, 192(3)" "\n" |
| 364 | " ld 25, 200(3)" "\n" |
| 365 | " ld 26, 208(3)" "\n" |
| 366 | " ld 27, 216(3)" "\n" |
| 367 | " ld 28, 224(3)" "\n" |
| 368 | " ld 29, 232(3)" "\n" |
| 369 | " ld 30, 240(3)" "\n" |
| 370 | " ld 31, 248(3)" "\n" |
| 371 | " ld 3, 24(3)" "\n" |
| 372 | " blr" "\n" |
| 373 | "" "\n" |
| 374 | |
| 375 | ".previous" "\n" |
| 376 | ); |
carll | cae0cc2 | 2014-08-07 23:17:29 +0000 | [diff] [blame] | 377 | #endif /* VGP_ppc64be_linux */ |
sewardj | 2a88a01 | 2011-04-11 21:26:27 +0000 | [diff] [blame] | 378 | |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 379 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 380 | /* ------------ amd64-{linux,darwin} ------------ */ |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 381 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 382 | #if defined(VGP_amd64_linux) || defined(VGP_amd64_darwin) |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 383 | |
| 384 | __asm__( |
| 385 | ".text" "\n" |
| 386 | "" "\n" |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 387 | |
| 388 | #if defined(VGP_amd64_linux) |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 389 | ".global VG_MINIMAL_SETJMP" "\n" // rdi = jmp_buf |
| 390 | "VG_MINIMAL_SETJMP:" "\n" |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 391 | |
| 392 | #elif defined(VGP_amd64_darwin) |
| 393 | ".globl _VG_MINIMAL_SETJMP" "\n" // rdi = jmp_buf |
| 394 | "_VG_MINIMAL_SETJMP:" "\n" |
| 395 | |
| 396 | #else |
| 397 | # error "Huh?" |
| 398 | #endif |
| 399 | |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 400 | " movq %rax, 0(%rdi)" "\n" |
| 401 | " movq %rbx, 8(%rdi)" "\n" |
| 402 | " movq %rcx, 16(%rdi)" "\n" |
| 403 | " movq %rdx, 24(%rdi)" "\n" |
| 404 | " movq %rdi, 32(%rdi)" "\n" |
| 405 | " movq %rsi, 40(%rdi)" "\n" |
| 406 | " movq %rbp, 48(%rdi)" "\n" |
| 407 | " movq %rsp, 56(%rdi)" "\n" |
| 408 | " movq %r8, 64(%rdi)" "\n" |
| 409 | " movq %r9, 72(%rdi)" "\n" |
| 410 | " movq %r10, 80(%rdi)" "\n" |
| 411 | " movq %r11, 88(%rdi)" "\n" |
| 412 | " movq %r12, 96(%rdi)" "\n" |
| 413 | " movq %r13, 104(%rdi)" "\n" |
| 414 | " movq %r14, 112(%rdi)" "\n" |
| 415 | " movq %r15, 120(%rdi)" "\n" |
| 416 | // store the return address |
| 417 | " movq 0(%rsp), %rax" "\n" |
| 418 | " movq %rax, 128(%rdi)" "\n" |
| 419 | // and return zero |
| 420 | " movq $0, %rax" "\n" |
| 421 | " ret" "\n" |
| 422 | "" "\n" |
| 423 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 424 | |
| 425 | #if defined(VGP_amd64_linux) |
| 426 | ".global VG_MINIMAL_LONGJMP" "\n" |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 427 | "VG_MINIMAL_LONGJMP:" "\n" // rdi = jmp_buf |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 428 | |
| 429 | #elif defined(VGP_amd64_darwin) |
| 430 | ".globl _VG_MINIMAL_LONGJMP" "\n" |
| 431 | "_VG_MINIMAL_LONGJMP:" "\n" // rdi = jmp_buf |
| 432 | |
| 433 | #else |
| 434 | # error "Huh?" |
| 435 | #endif |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 436 | // skip restoring rax; it's pointless |
| 437 | " movq 8(%rdi), %rbx" "\n" |
| 438 | " movq 16(%rdi), %rcx" "\n" |
| 439 | " movq 24(%rdi), %rdx" "\n" |
| 440 | // defer restoring rdi; we still need it |
| 441 | " movq 40(%rdi), %rsi" "\n" |
| 442 | " movq 48(%rdi), %rbp" "\n" |
| 443 | " movq 56(%rdi), %rsp" "\n" |
| 444 | " movq 64(%rdi), %r8" "\n" |
| 445 | " movq 72(%rdi), %r9" "\n" |
| 446 | " movq 80(%rdi), %r10" "\n" |
| 447 | " movq 88(%rdi), %r11" "\n" |
| 448 | " movq 96(%rdi), %r12" "\n" |
| 449 | " movq 104(%rdi), %r13" "\n" |
| 450 | " movq 112(%rdi), %r14" "\n" |
| 451 | " movq 120(%rdi), %r15" "\n" |
| 452 | // restore the return address |
| 453 | " movq 128(%rdi), %rax" "\n" |
| 454 | // restore rdi; this is the last use |
| 455 | " movq 32(%rdi), %rdi" "\n" |
| 456 | // make %rsp look like we really did a return |
| 457 | " addq $8, %rsp" "\n" |
| 458 | // continue at RA of original call. Note: this is a |
| 459 | // nasty trick. We assume that %rax is nonzero, and so the |
| 460 | // caller can differentiate this case from the normal _SETJMP |
| 461 | // return case. If the return address ever is zero, then |
| 462 | // we're hosed; but that seems pretty unlikely given that it |
| 463 | // would mean we'd be executing at the wraparound point of the |
| 464 | // address space. |
| 465 | " jmp *%rax" "\n" |
| 466 | "" "\n" |
| 467 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 468 | #if !defined(VGP_amd64_darwin) |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 469 | ".previous" "\n" |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 470 | #endif |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 471 | ); |
| 472 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 473 | #endif /* VGP_amd64_linux || VGP_amd64_darwin */ |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 474 | |
| 475 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 476 | /* ------------ x86-{linux,darwin} ------------ */ |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 477 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 478 | #if defined(VGP_x86_linux) || defined(VGP_x86_darwin) |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 479 | |
| 480 | __asm__( |
| 481 | ".text" "\n" |
| 482 | "" "\n" |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 483 | |
| 484 | #if defined(VGP_x86_linux) |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 485 | ".global VG_MINIMAL_SETJMP" "\n" // eax = jmp_buf |
| 486 | "VG_MINIMAL_SETJMP:" "\n" |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 487 | |
| 488 | #elif defined(VGP_x86_darwin) |
| 489 | ".globl _VG_MINIMAL_SETJMP" "\n" // eax = jmp_buf |
| 490 | "_VG_MINIMAL_SETJMP:" "\n" |
| 491 | |
| 492 | #else |
| 493 | # error "Huh?" |
| 494 | #endif |
| 495 | |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 496 | " movl %eax, 0(%eax)" "\n" |
| 497 | " movl %ebx, 4(%eax)" "\n" |
| 498 | " movl %ecx, 8(%eax)" "\n" |
| 499 | " movl %edx, 12(%eax)" "\n" |
| 500 | " movl %edi, 16(%eax)" "\n" |
| 501 | " movl %esi, 20(%eax)" "\n" |
| 502 | " movl %ebp, 24(%eax)" "\n" |
| 503 | " movl %esp, 28(%eax)" "\n" |
| 504 | // store the return address |
| 505 | " movl 0(%esp), %ebx" "\n" |
| 506 | " movl %ebx, 32(%eax)" "\n" |
| 507 | // un-trash ebx (necessary? i don't know) |
| 508 | " movl 4(%eax), %ebx" "\n" |
| 509 | // and return zero |
| 510 | " movl $0, %eax" "\n" |
| 511 | " ret" "\n" |
| 512 | "" "\n" |
| 513 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 514 | |
| 515 | #if defined(VGP_x86_linux) |
| 516 | ".global VG_MINIMAL_LONGJMP" "\n" |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 517 | "VG_MINIMAL_LONGJMP:" "\n" // eax = jmp_buf |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 518 | |
| 519 | #elif defined(VGP_x86_darwin) |
| 520 | ".globl _VG_MINIMAL_LONGJMP" "\n" |
| 521 | "_VG_MINIMAL_LONGJMP:" "\n" // eax = jmp_buf |
| 522 | |
| 523 | #else |
| 524 | # error "Huh?" |
| 525 | #endif |
| 526 | |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 527 | // skip restoring eax; it's pointless |
| 528 | " movl 4(%eax), %ebx" "\n" |
| 529 | " movl 8(%eax), %ecx" "\n" |
| 530 | " movl 12(%eax), %edx" "\n" |
| 531 | " movl 16(%eax), %edi" "\n" |
| 532 | " movl 20(%eax), %esi" "\n" |
| 533 | " movl 24(%eax), %ebp" "\n" |
| 534 | " movl 28(%eax), %esp" "\n" |
| 535 | // restore the return address |
| 536 | " movl 32(%eax), %eax" "\n" |
| 537 | // make %esp look like we really did a return |
| 538 | " addl $4, %esp" "\n" |
| 539 | // continue at RA of original call. Same zero-vs-nonzero |
| 540 | // trick/assumption as documented for the amd64-linux case. |
| 541 | " jmp *%eax" "\n" |
| 542 | "" "\n" |
| 543 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 544 | #if !defined(VGP_x86_darwin) |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 545 | ".previous" "\n" |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 546 | #endif |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 547 | ); |
| 548 | |
sewardj | da91ee7 | 2011-09-29 18:29:41 +0000 | [diff] [blame] | 549 | #endif /* VGP_x86_linux || VGP_x86_darwin */ |
sewardj | fc824cb | 2011-09-29 17:33:58 +0000 | [diff] [blame] | 550 | |
dejanj | 5f790e8 | 2013-07-25 08:22:08 +0000 | [diff] [blame] | 551 | #if defined(VGP_mips32_linux) |
| 552 | |
| 553 | __asm__( |
| 554 | ".text \n\t" |
| 555 | ".globl VG_MINIMAL_SETJMP; \n\t" |
| 556 | ".align 2; \n\t" |
| 557 | "VG_MINIMAL_SETJMP: \n\t" /* a0 = jmp_buf */ |
| 558 | " sw $s0, 0($a0) \n\t" /* Save registers s0-s7. */ |
| 559 | " sw $s1, 4($a0) \n\t" |
| 560 | " sw $s2, 8($a0) \n\t" |
| 561 | " sw $s3, 12($a0) \n\t" |
| 562 | " sw $s4, 16($a0) \n\t" |
| 563 | " sw $s5, 20($a0) \n\t" |
| 564 | " sw $s6, 24($a0) \n\t" |
| 565 | " sw $s7, 28($a0) \n\t" |
| 566 | " sw $s8, 32($a0) \n\t" /* Frame pointer. */ |
| 567 | " sw $ra, 36($a0) \n\t" /* Return address. */ |
| 568 | " sw $gp, 40($a0) \n\t" /* Global data pointer. */ |
| 569 | " sw $sp, 44($a0) \n\t" /* Stack pointer. */ |
| 570 | |
| 571 | " move $v0, $zero \n\t" /* Return zero. */ |
| 572 | " j $ra \n\t" |
| 573 | " nop \n\t" |
dejanj | 751c1e6 | 2013-08-15 13:37:29 +0000 | [diff] [blame] | 574 | ".previous \n\t" |
dejanj | 5f790e8 | 2013-07-25 08:22:08 +0000 | [diff] [blame] | 575 | " \n\t" |
| 576 | ".globl VG_MINIMAL_LONGJMP; \n\t" |
| 577 | ".align 2; \n\t" |
| 578 | "VG_MINIMAL_LONGJMP: \n\t" /* a0 = jmp_buf */ |
| 579 | " lw $s0, 0($a0) \n\t" /* Restore registers s0-s7. */ |
| 580 | " lw $s1, 4($a0) \n\t" |
| 581 | " lw $s2, 8($a0) \n\t" |
| 582 | " lw $s3, 12($a0) \n\t" |
| 583 | " lw $s4, 16($a0) \n\t" |
| 584 | " lw $s5, 20($a0) \n\t" |
| 585 | " lw $s6, 24($a0) \n\t" |
| 586 | " lw $s7, 28($a0) \n\t" |
| 587 | " lw $s8, 32($a0) \n\t" /* Frame pointer. */ |
| 588 | " lw $ra, 36($a0) \n\t" /* Return address. */ |
| 589 | " lw $gp, 40($a0) \n\t" /* Global data pointer. */ |
| 590 | " lw $sp, 44($a0) \n\t" /* Stack pointer. */ |
| 591 | |
| 592 | /* Checking whether second argument is zero. */ |
| 593 | " bnez $a1, 1f \n\t" |
| 594 | " nop \n\t" |
| 595 | " addi $a1, $a1, 1 \n\t" /* We must return 1 if val=0. */ |
| 596 | "1: \n\t" |
| 597 | " move $v0, $a1 \n\t" /* Return value of second argument. */ |
| 598 | " j $ra \n\t" |
dejanj | 751c1e6 | 2013-08-15 13:37:29 +0000 | [diff] [blame] | 599 | " nop \n\t" |
| 600 | ".previous \n\t" |
dejanj | 5f790e8 | 2013-07-25 08:22:08 +0000 | [diff] [blame] | 601 | ); |
| 602 | #endif /* VGP_mips32_linux */ |
| 603 | |
sewardj | 6c591e1 | 2011-04-11 16:17:51 +0000 | [diff] [blame] | 604 | /*--------------------------------------------------------------------*/ |
| 605 | /*--- end ---*/ |
| 606 | /*--------------------------------------------------------------------*/ |