njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Doing syscalls. m_syscall.c ---*/ |
| 4 | /*--------------------------------------------------------------------*/ |
| 5 | |
| 6 | /* |
| 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
| 9 | |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame] | 10 | Copyright (C) 2000-2017 Julian Seward |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 11 | jseward@acm.org |
| 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 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 31 | #include "pub_core_basics.h" |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 32 | #include "pub_core_libcassert.h" |
sewardj | 4cfea4f | 2006-10-14 19:26:10 +0000 | [diff] [blame] | 33 | #include "pub_core_vki.h" |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 34 | #include "pub_core_vkiscnums.h" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 35 | #include "pub_core_syscall.h" |
| 36 | |
| 37 | /* --------------------------------------------------------------------- |
| 38 | Building syscall return values. |
| 39 | ------------------------------------------------------------------ */ |
| 40 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 41 | /* Make a SysRes value from a syscall return value. This is |
sewardj | bd664fd | 2015-07-08 17:08:23 +0000 | [diff] [blame] | 42 | platform specific. */ |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 43 | |
sewardj | bd664fd | 2015-07-08 17:08:23 +0000 | [diff] [blame] | 44 | #if defined(VGP_mips32_linux) || defined(VGP_mips64_linux) |
| 45 | |
| 46 | SysRes VG_(mk_SysRes_mips32_linux) ( UWord v0, UWord v1, UWord a3 ) { |
| 47 | /* MIPS uses a3 != 0 to flag an error */ |
| 48 | SysRes res; |
| 49 | res._isError = (a3 != (UWord)0); |
| 50 | res._val = v0; |
| 51 | res._valEx = v1; |
| 52 | return res; |
| 53 | } |
| 54 | |
| 55 | SysRes VG_(mk_SysRes_mips64_linux) ( ULong v0, ULong v1, ULong a3 ) { |
| 56 | /* MIPS uses a3 != 0 to flag an error */ |
| 57 | SysRes res; |
| 58 | res._isError = (a3 != (ULong)0); |
| 59 | res._val = v0; |
| 60 | res._valEx = v1; |
| 61 | return res; |
| 62 | } |
| 63 | |
| 64 | /* Generic constructors. */ |
| 65 | SysRes VG_(mk_SysRes_Error) ( UWord err ) { |
| 66 | SysRes r; |
| 67 | r._isError = True; |
| 68 | r._val = err; |
| 69 | r._valEx = 0; |
| 70 | return r; |
| 71 | } |
| 72 | |
| 73 | SysRes VG_(mk_SysRes_Success) ( UWord res ) { |
| 74 | SysRes r; |
| 75 | r._isError = False; |
| 76 | r._val = res; |
| 77 | r._valEx = 0; |
| 78 | return r; |
| 79 | } |
| 80 | |
| 81 | SysRes VG_(mk_SysRes_SuccessEx) ( UWord res, UWord resEx ) { |
| 82 | SysRes r; |
| 83 | r._isError = False; |
| 84 | r._val = res; |
| 85 | r._valEx = resEx; |
| 86 | return r; |
| 87 | } |
| 88 | |
| 89 | |
| 90 | #elif defined(VGO_linux) \ |
| 91 | && !defined(VGP_mips32_linux) && !defined(VGP_mips64_linux) |
| 92 | |
| 93 | /* |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 94 | From: |
| 95 | http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/ |
| 96 | linux/i386/sysdep.h? |
| 97 | rev=1.28&content-type=text/x-cvsweb-markup&cvsroot=glibc |
| 98 | |
| 99 | Linux uses a negative return value to indicate syscall errors, |
| 100 | unlike most Unices, which use the condition codes' carry flag. |
| 101 | |
| 102 | Since version 2.1 the return value of a system call might be |
| 103 | negative even if the call succeeded. E.g., the 'lseek' system call |
| 104 | might return a large offset. Therefore we must not anymore test |
| 105 | for < 0, but test for a real error by making sure the value in %eax |
| 106 | is a real error number. Linus said he will make sure the no |
| 107 | syscall returns a value in -1 .. -4095 as a valid result so we can |
| 108 | safely test with -4095. |
| 109 | */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 110 | |
| 111 | SysRes VG_(mk_SysRes_x86_linux) ( Int val ) { |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 112 | SysRes res; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 113 | res._isError = val >= -4095 && val <= -1; |
| 114 | if (res._isError) { |
| 115 | res._val = (UInt)(-val); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 116 | } else { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 117 | res._val = (UInt)val; |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 118 | } |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 119 | return res; |
| 120 | } |
| 121 | |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 122 | /* Similarly .. */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 123 | SysRes VG_(mk_SysRes_amd64_linux) ( Long val ) { |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 124 | SysRes res; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 125 | res._isError = val >= -4095 && val <= -1; |
| 126 | if (res._isError) { |
| 127 | res._val = (ULong)(-val); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 128 | } else { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 129 | res._val = (ULong)val; |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 130 | } |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 131 | return res; |
| 132 | } |
| 133 | |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 134 | /* PPC uses the CR7.SO bit to flag an error (CR0 in IBM-speak) */ |
sewardj | 39a7c1d | 2005-11-24 03:54:38 +0000 | [diff] [blame] | 135 | /* Note this must be in the bottom bit of the second arg */ |
| 136 | SysRes VG_(mk_SysRes_ppc32_linux) ( UInt val, UInt cr0so ) { |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 137 | SysRes res; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 138 | res._isError = (cr0so & 1) != 0; |
| 139 | res._val = val; |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 140 | return res; |
| 141 | } |
| 142 | |
sewardj | 38a88b7 | 2006-01-02 16:32:10 +0000 | [diff] [blame] | 143 | /* As per ppc32 version, cr0.so must be in l.s.b. of 2nd arg */ |
| 144 | SysRes VG_(mk_SysRes_ppc64_linux) ( ULong val, ULong cr0so ) { |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 145 | SysRes res; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 146 | res._isError = (cr0so & 1) != 0; |
| 147 | res._val = val; |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 148 | return res; |
| 149 | } |
| 150 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 151 | SysRes VG_(mk_SysRes_s390x_linux) ( Long val ) { |
| 152 | SysRes res; |
| 153 | res._isError = val >= -4095 && val <= -1; |
| 154 | if (res._isError) { |
| 155 | res._val = -val; |
| 156 | } else { |
| 157 | res._val = val; |
| 158 | } |
| 159 | return res; |
| 160 | } |
| 161 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 162 | SysRes VG_(mk_SysRes_arm_linux) ( Int val ) { |
| 163 | SysRes res; |
| 164 | res._isError = val >= -4095 && val <= -1; |
| 165 | if (res._isError) { |
| 166 | res._val = (UInt)(-val); |
| 167 | } else { |
| 168 | res._val = (UInt)val; |
| 169 | } |
| 170 | return res; |
| 171 | } |
| 172 | |
sewardj | f0c1250 | 2014-01-12 12:54:00 +0000 | [diff] [blame] | 173 | SysRes VG_(mk_SysRes_arm64_linux) ( Long val ) { |
| 174 | SysRes res; |
sewardj | f0c1250 | 2014-01-12 12:54:00 +0000 | [diff] [blame] | 175 | res._isError = val >= -4095 && val <= -1; |
| 176 | if (res._isError) { |
| 177 | res._val = (ULong)(-val); |
| 178 | } else { |
| 179 | res._val = (ULong)val; |
| 180 | } |
| 181 | return res; |
| 182 | } |
| 183 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 184 | /* Generic constructors. */ |
| 185 | SysRes VG_(mk_SysRes_Error) ( UWord err ) { |
| 186 | SysRes r; |
| 187 | r._isError = True; |
| 188 | r._val = err; |
| 189 | return r; |
| 190 | } |
| 191 | |
| 192 | SysRes VG_(mk_SysRes_Success) ( UWord res ) { |
| 193 | SysRes r; |
| 194 | r._isError = False; |
| 195 | r._val = res; |
| 196 | return r; |
| 197 | } |
| 198 | |
| 199 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 200 | #elif defined(VGO_darwin) |
| 201 | |
| 202 | /* Darwin: Some syscalls return a double-word result. */ |
| 203 | SysRes VG_(mk_SysRes_x86_darwin) ( UChar scclass, Bool isErr, |
| 204 | UInt wHI, UInt wLO ) |
| 205 | { |
| 206 | SysRes res; |
| 207 | res._wHI = 0; |
| 208 | res._wLO = 0; |
| 209 | res._mode = 0; /* invalid */ |
| 210 | vg_assert(isErr == False || isErr == True); |
| 211 | vg_assert(sizeof(UWord) == sizeof(UInt)); |
| 212 | switch (scclass) { |
| 213 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 214 | res._wLO = wLO; |
| 215 | res._wHI = wHI; |
| 216 | res._mode = isErr ? SysRes_UNIX_ERR : SysRes_UNIX_OK; |
| 217 | break; |
| 218 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 219 | vg_assert(!isErr); |
| 220 | vg_assert(wHI == 0); |
| 221 | res._wLO = wLO; |
| 222 | res._mode = SysRes_MACH; |
| 223 | break; |
| 224 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 225 | vg_assert(!isErr); |
| 226 | vg_assert(wHI == 0); |
| 227 | res._wLO = wLO; |
| 228 | res._mode = SysRes_MDEP; |
| 229 | break; |
| 230 | default: |
| 231 | vg_assert(0); |
| 232 | } |
| 233 | return res; |
| 234 | } |
| 235 | |
| 236 | SysRes VG_(mk_SysRes_amd64_darwin) ( UChar scclass, Bool isErr, |
| 237 | ULong wHI, ULong wLO ) |
| 238 | { |
| 239 | SysRes res; |
| 240 | res._wHI = 0; |
| 241 | res._wLO = 0; |
| 242 | res._mode = 0; /* invalid */ |
| 243 | vg_assert(isErr == False || isErr == True); |
| 244 | vg_assert(sizeof(UWord) == sizeof(ULong)); |
| 245 | switch (scclass) { |
| 246 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 247 | res._wLO = wLO; |
| 248 | res._wHI = wHI; |
| 249 | res._mode = isErr ? SysRes_UNIX_ERR : SysRes_UNIX_OK; |
| 250 | break; |
| 251 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 252 | vg_assert(!isErr); |
| 253 | vg_assert(wHI == 0); |
| 254 | res._wLO = wLO; |
| 255 | res._mode = SysRes_MACH; |
| 256 | break; |
| 257 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 258 | vg_assert(!isErr); |
| 259 | vg_assert(wHI == 0); |
| 260 | res._wLO = wLO; |
| 261 | res._mode = SysRes_MDEP; |
| 262 | break; |
| 263 | default: |
| 264 | vg_assert(0); |
| 265 | } |
| 266 | return res; |
| 267 | } |
| 268 | |
| 269 | /* Generic constructors. We assume (without checking if this makes |
| 270 | any sense, from the caller's point of view) that these are for the |
| 271 | UNIX style of syscall. */ |
| 272 | SysRes VG_(mk_SysRes_Error) ( UWord err ) { |
| 273 | SysRes r; |
| 274 | r._wHI = 0; |
| 275 | r._wLO = err; |
| 276 | r._mode = SysRes_UNIX_ERR; |
| 277 | return r; |
| 278 | } |
| 279 | |
| 280 | SysRes VG_(mk_SysRes_Success) ( UWord res ) { |
| 281 | SysRes r; |
| 282 | r._wHI = 0; |
| 283 | r._wLO = res; |
| 284 | r._mode = SysRes_UNIX_OK; |
| 285 | return r; |
| 286 | } |
| 287 | |
| 288 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 289 | #elif defined(VGO_solaris) |
| 290 | |
| 291 | /* Generic constructors. */ |
| 292 | SysRes VG_(mk_SysRes_Error) ( UWord err ) { |
| 293 | SysRes r; |
| 294 | r._val = err; |
| 295 | r._val2 = 0; |
| 296 | r._isError = True; |
| 297 | return r; |
| 298 | } |
| 299 | |
| 300 | SysRes VG_(mk_SysRes_Success) ( UWord res ) { |
| 301 | SysRes r; |
| 302 | r._val = res; |
| 303 | r._val2 = 0; |
| 304 | r._isError = False; |
| 305 | return r; |
| 306 | } |
| 307 | |
| 308 | SysRes VG_(mk_SysRes_x86_solaris) ( Bool isErr, UInt val, UInt val2 ) |
| 309 | { |
| 310 | SysRes res; |
| 311 | |
| 312 | // stay sane |
| 313 | vg_assert(isErr == True || isErr == False); |
| 314 | |
| 315 | res._val = val; |
| 316 | res._val2 = val2; |
| 317 | res._isError = isErr; |
| 318 | return res; |
| 319 | } |
| 320 | |
| 321 | SysRes VG_(mk_SysRes_amd64_solaris) ( Bool isErr, ULong val, ULong val2 ) |
| 322 | { |
| 323 | SysRes res; |
| 324 | |
| 325 | // stay sane |
| 326 | vg_assert(isErr == True || isErr == False); |
| 327 | |
| 328 | res._val = val; |
| 329 | res._val2 = val2; |
| 330 | res._isError = isErr; |
| 331 | return res; |
| 332 | } |
| 333 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 334 | #else |
| 335 | # error "Unknown OS" |
| 336 | #endif |
| 337 | |
| 338 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 339 | /* --------------------------------------------------------------------- |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 340 | VG_(do_syscall): A function for doing syscalls. |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 341 | ------------------------------------------------------------------ */ |
| 342 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 343 | #if defined(VGP_x86_linux) |
| 344 | /* Incoming args (syscall number + up to 6 args) come on the stack. |
| 345 | (ie. the C calling convention). |
| 346 | |
| 347 | The syscall number goes in %eax. The args are passed to the syscall in |
| 348 | the regs %ebx, %ecx, %edx, %esi, %edi, %ebp, ie. the kernel's syscall |
| 349 | calling convention. |
| 350 | |
| 351 | %eax gets the return value. Not sure which registers the kernel |
| 352 | clobbers, so we preserve all the callee-save regs (%esi, %edi, %ebx, |
| 353 | %ebp). |
| 354 | */ |
sewardj | 03d8aa8 | 2005-10-14 11:25:49 +0000 | [diff] [blame] | 355 | extern UWord do_syscall_WRK ( |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 356 | UWord syscall_no, |
| 357 | UWord a1, UWord a2, UWord a3, |
| 358 | UWord a4, UWord a5, UWord a6 |
| 359 | ); |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 360 | asm( |
sewardj | d9fc382 | 2005-11-18 23:50:43 +0000 | [diff] [blame] | 361 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 362 | ".globl do_syscall_WRK\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 363 | "do_syscall_WRK:\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 364 | " .cfi_startproc\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 365 | " push %esi\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 366 | " .cfi_adjust_cfa_offset 4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 367 | " .cfi_offset %esi, -8\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 368 | " push %edi\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 369 | " .cfi_adjust_cfa_offset 4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 370 | " .cfi_offset %edi, -12\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 371 | " push %ebx\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 372 | " .cfi_adjust_cfa_offset 4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 373 | " .cfi_offset %ebx, -16\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 374 | " push %ebp\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 375 | " .cfi_adjust_cfa_offset 4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 376 | " .cfi_offset %ebp, -20\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 377 | " movl 16+ 4(%esp),%eax\n" |
| 378 | " movl 16+ 8(%esp),%ebx\n" |
| 379 | " movl 16+12(%esp),%ecx\n" |
| 380 | " movl 16+16(%esp),%edx\n" |
| 381 | " movl 16+20(%esp),%esi\n" |
| 382 | " movl 16+24(%esp),%edi\n" |
| 383 | " movl 16+28(%esp),%ebp\n" |
| 384 | " int $0x80\n" |
| 385 | " popl %ebp\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 386 | " .cfi_adjust_cfa_offset -4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 387 | " .cfi_restore %ebp\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 388 | " popl %ebx\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 389 | " .cfi_adjust_cfa_offset -4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 390 | " .cfi_restore %ebx\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 391 | " popl %edi\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 392 | " .cfi_adjust_cfa_offset -4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 393 | " .cfi_restore %edi\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 394 | " popl %esi\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 395 | " .cfi_adjust_cfa_offset -4\n" |
philippe | 2d61633 | 2015-05-17 08:24:40 +0000 | [diff] [blame] | 396 | " .cfi_restore %esi\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 397 | " ret\n" |
philippe | 4ed95fc | 2015-05-08 21:37:18 +0000 | [diff] [blame] | 398 | " .cfi_endproc\n" |
sewardj | 2fedc64 | 2005-11-19 02:02:57 +0000 | [diff] [blame] | 399 | ".previous\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 400 | ); |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 401 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 402 | #elif defined(VGP_amd64_linux) |
| 403 | /* Incoming args (syscall number + up to 6 args) come in %rdi, %rsi, |
| 404 | %rdx, %rcx, %r8, %r9, and the last one on the stack (ie. the C |
| 405 | calling convention). |
| 406 | |
| 407 | The syscall number goes in %rax. The args are passed to the syscall in |
| 408 | the regs %rdi, %rsi, %rdx, %r10, %r8, %r9 (yes, really %r10, not %rcx), |
| 409 | ie. the kernel's syscall calling convention. |
| 410 | |
| 411 | %rax gets the return value. %rcx and %r11 are clobbered by the syscall; |
| 412 | no matter, they are caller-save (the syscall clobbers no callee-save |
| 413 | regs, so we don't have to do any register saving/restoring). |
| 414 | */ |
sewardj | 03d8aa8 | 2005-10-14 11:25:49 +0000 | [diff] [blame] | 415 | extern UWord do_syscall_WRK ( |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 416 | UWord syscall_no, |
| 417 | UWord a1, UWord a2, UWord a3, |
| 418 | UWord a4, UWord a5, UWord a6 |
| 419 | ); |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 420 | asm( |
sewardj | d9fc382 | 2005-11-18 23:50:43 +0000 | [diff] [blame] | 421 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 422 | ".globl do_syscall_WRK\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 423 | "do_syscall_WRK:\n" |
| 424 | /* Convert function calling convention --> syscall calling |
| 425 | convention */ |
| 426 | " movq %rdi, %rax\n" |
| 427 | " movq %rsi, %rdi\n" |
| 428 | " movq %rdx, %rsi\n" |
| 429 | " movq %rcx, %rdx\n" |
| 430 | " movq %r8, %r10\n" |
| 431 | " movq %r9, %r8\n" |
| 432 | " movq 8(%rsp), %r9\n" /* last arg from stack */ |
| 433 | " syscall\n" |
| 434 | " ret\n" |
sewardj | 2fedc64 | 2005-11-19 02:02:57 +0000 | [diff] [blame] | 435 | ".previous\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 436 | ); |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 437 | |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 438 | #elif defined(VGP_ppc32_linux) |
sewardj | 39a7c1d | 2005-11-24 03:54:38 +0000 | [diff] [blame] | 439 | /* Incoming args (syscall number + up to 6 args) come in %r3:%r9. |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 440 | |
| 441 | The syscall number goes in %r0. The args are passed to the syscall in |
| 442 | the regs %r3:%r8, i.e. the kernel's syscall calling convention. |
| 443 | |
| 444 | The %cr0.so bit flags an error. |
sewardj | 39a7c1d | 2005-11-24 03:54:38 +0000 | [diff] [blame] | 445 | We return the syscall return value in %r3, and the %cr0.so in |
| 446 | the lowest bit of %r4. |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 447 | We return a ULong, of which %r3 is the high word, and %r4 the low. |
| 448 | No callee-save regs are clobbered, so no saving/restoring is needed. |
| 449 | */ |
sewardj | 03d8aa8 | 2005-10-14 11:25:49 +0000 | [diff] [blame] | 450 | extern ULong do_syscall_WRK ( |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 451 | UWord syscall_no, |
| 452 | UWord a1, UWord a2, UWord a3, |
| 453 | UWord a4, UWord a5, UWord a6 |
| 454 | ); |
| 455 | asm( |
sewardj | d9fc382 | 2005-11-18 23:50:43 +0000 | [diff] [blame] | 456 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 457 | ".globl do_syscall_WRK\n" |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 458 | "do_syscall_WRK:\n" |
| 459 | " mr 0,3\n" |
| 460 | " mr 3,4\n" |
| 461 | " mr 4,5\n" |
| 462 | " mr 5,6\n" |
| 463 | " mr 6,7\n" |
| 464 | " mr 7,8\n" |
| 465 | " mr 8,9\n" |
| 466 | " sc\n" /* syscall: sets %cr0.so on error */ |
| 467 | " mfcr 4\n" /* %cr -> low word of return var */ |
| 468 | " rlwinm 4,4,4,31,31\n" /* rotate flag bit so to lsb, and mask it */ |
| 469 | " blr\n" /* and return */ |
sewardj | 2fedc64 | 2005-11-19 02:02:57 +0000 | [diff] [blame] | 470 | ".previous\n" |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 471 | ); |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 472 | |
carll | cae0cc2 | 2014-08-07 23:17:29 +0000 | [diff] [blame] | 473 | #elif defined(VGP_ppc64be_linux) |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 474 | /* Due to the need to return 65 bits of result, this is completely |
| 475 | different from the ppc32 case. The single arg register points to a |
| 476 | 7-word block containing the syscall # and the 6 args. The syscall |
| 477 | result proper is put in [0] of the block, and %cr0.so is in the |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 478 | bottom bit of [1]. */ |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 479 | extern void do_syscall_WRK ( ULong* argblock ); |
| 480 | asm( |
cerion | 297c88f | 2005-12-22 15:53:12 +0000 | [diff] [blame] | 481 | ".align 2\n" |
| 482 | ".globl do_syscall_WRK\n" |
| 483 | ".section \".opd\",\"aw\"\n" |
| 484 | ".align 3\n" |
| 485 | "do_syscall_WRK:\n" |
| 486 | ".quad .do_syscall_WRK,.TOC.@tocbase,0\n" |
| 487 | ".previous\n" |
| 488 | ".type .do_syscall_WRK,@function\n" |
| 489 | ".globl .do_syscall_WRK\n" |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 490 | ".do_syscall_WRK:\n" |
| 491 | " std 3,-16(1)\n" /* stash arg */ |
| 492 | " ld 8, 48(3)\n" /* sc arg 6 */ |
| 493 | " ld 7, 40(3)\n" /* sc arg 5 */ |
| 494 | " ld 6, 32(3)\n" /* sc arg 4 */ |
| 495 | " ld 5, 24(3)\n" /* sc arg 3 */ |
| 496 | " ld 4, 16(3)\n" /* sc arg 2 */ |
| 497 | " ld 0, 0(3)\n" /* sc number */ |
| 498 | " ld 3, 8(3)\n" /* sc arg 1 */ |
| 499 | " sc\n" /* result in r3 and cr0.so */ |
| 500 | " ld 5,-16(1)\n" /* reacquire argblock ptr (r5 is caller-save) */ |
| 501 | " std 3,0(5)\n" /* argblock[0] = r3 */ |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 502 | " mfcr 3\n" |
| 503 | " srwi 3,3,28\n" |
| 504 | " andi. 3,3,1\n" |
| 505 | " std 3,8(5)\n" /* argblock[1] = cr0.s0 & 1 */ |
| 506 | " blr\n" |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 507 | ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 508 | |
carll | 582d582 | 2014-08-07 23:35:54 +0000 | [diff] [blame] | 509 | #elif defined(VGP_ppc64le_linux) |
| 510 | /* Due to the need to return 65 bits of result, this is completely |
| 511 | different from the ppc32 case. The single arg register points to a |
| 512 | 7-word block containing the syscall # and the 6 args. The syscall |
| 513 | result proper is put in [0] of the block, and %cr0.so is in the |
| 514 | bottom bit of [1]. */ |
| 515 | extern void do_syscall_WRK ( ULong* argblock ); |
| 516 | /* Little Endian supports ELF version 2. In the future, it may support |
| 517 | * other versions as well. |
| 518 | */ |
| 519 | asm( |
| 520 | ".align 2\n" |
| 521 | ".globl do_syscall_WRK\n" |
| 522 | ".type do_syscall_WRK,@function\n" |
| 523 | "do_syscall_WRK:\n" |
| 524 | "#if _CALL_ELF == 2" "\n" |
| 525 | "0: addis 2,12,.TOC.-0b@ha\n" |
| 526 | " addi 2,2,.TOC.-0b@l\n" |
| 527 | " .localentry do_syscall_WRK, .-do_syscall_WRK\n" |
| 528 | "#endif" "\n" |
| 529 | " std 3,-16(1)\n" /* stash arg */ |
| 530 | " ld 8, 48(3)\n" /* sc arg 6 */ |
| 531 | " ld 7, 40(3)\n" /* sc arg 5 */ |
| 532 | " ld 6, 32(3)\n" /* sc arg 4 */ |
| 533 | " ld 5, 24(3)\n" /* sc arg 3 */ |
| 534 | " ld 4, 16(3)\n" /* sc arg 2 */ |
| 535 | " ld 0, 0(3)\n" /* sc number */ |
| 536 | " ld 3, 8(3)\n" /* sc arg 1 */ |
| 537 | " sc\n" /* result in r3 and cr0.so */ |
| 538 | " ld 5,-16(1)\n" /* reacquire argblock ptr (r5 is caller-save) */ |
| 539 | " std 3,0(5)\n" /* argblock[0] = r3 */ |
| 540 | " mfcr 3\n" |
| 541 | " srwi 3,3,28\n" |
| 542 | " andi. 3,3,1\n" |
| 543 | " std 3,8(5)\n" /* argblock[1] = cr0.s0 & 1 */ |
| 544 | " blr\n" |
| 545 | " .size do_syscall_WRK, .-do_syscall_WRK\n" |
| 546 | ); |
| 547 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 548 | #elif defined(VGP_arm_linux) |
| 549 | /* I think the conventions are: |
| 550 | args in r0 r1 r2 r3 r4 r5 |
| 551 | sysno in r7 |
| 552 | return value in r0, w/ same conventions as x86-linux, viz r0 in |
| 553 | -4096 .. -1 is an error value. All other values are success |
| 554 | values. |
| 555 | */ |
| 556 | extern UWord do_syscall_WRK ( |
| 557 | UWord a1, UWord a2, UWord a3, |
| 558 | UWord a4, UWord a5, UWord a6, |
| 559 | UWord syscall_no |
| 560 | ); |
| 561 | asm( |
| 562 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 563 | ".globl do_syscall_WRK\n" |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 564 | "do_syscall_WRK:\n" |
| 565 | " push {r4, r5, r7}\n" |
| 566 | " ldr r4, [sp, #12]\n" |
| 567 | " ldr r5, [sp, #16]\n" |
| 568 | " ldr r7, [sp, #20]\n" |
| 569 | " svc 0x0\n" |
| 570 | " pop {r4, r5, r7}\n" |
| 571 | " bx lr\n" |
| 572 | ".previous\n" |
| 573 | ); |
| 574 | |
sewardj | f0c1250 | 2014-01-12 12:54:00 +0000 | [diff] [blame] | 575 | #elif defined(VGP_arm64_linux) |
| 576 | /* I think the conventions are: |
| 577 | args in r0 r1 r2 r3 r4 r5 |
| 578 | sysno in r8 |
| 579 | return value in r0, w/ same conventions as x86-linux, viz r0 in |
| 580 | -4096 .. -1 is an error value. All other values are success |
| 581 | values. |
| 582 | |
| 583 | r0 to r5 remain unchanged, but syscall_no is in r6 and needs |
| 584 | to be moved to r8 (??) |
| 585 | */ |
| 586 | extern UWord do_syscall_WRK ( |
| 587 | UWord a1, UWord a2, UWord a3, |
| 588 | UWord a4, UWord a5, UWord a6, |
| 589 | UWord syscall_no |
| 590 | ); |
| 591 | asm( |
| 592 | ".text\n" |
| 593 | ".globl do_syscall_WRK\n" |
| 594 | "do_syscall_WRK:\n" |
| 595 | " mov x8, x6\n" |
| 596 | " mov x6, 0\n" |
| 597 | " mov x7, 0\n" |
| 598 | " svc 0\n" |
| 599 | " ret\n" |
| 600 | ".previous\n" |
| 601 | ); |
| 602 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 603 | #elif defined(VGP_x86_darwin) |
| 604 | |
| 605 | /* Incoming args (syscall number + up to 8 args) come in on the stack |
| 606 | |
| 607 | The kernel's syscall calling convention is: |
| 608 | * the syscall number goes in eax |
| 609 | * the args are passed to the syscall on the stack, |
| 610 | pushed onto the stack R->L (that is, the usual x86 |
| 611 | calling conventions, with the leftmost arg at the lowest |
| 612 | address) |
| 613 | Call instruction: |
| 614 | * UNIX: sysenter |
| 615 | * UNIX: int $0x80 |
| 616 | * MACH: int $0x81 |
| 617 | * MDEP: int $0x82 |
| 618 | Note that the call type can be determined from the syscall number; |
| 619 | there is no need to inspect the actual instruction. Although obviously |
| 620 | the instruction must match. |
| 621 | Return value: |
| 622 | * MACH,MDEP: the return value comes back in eax |
| 623 | * UNIX: the return value comes back in edx:eax (hi32:lo32) |
| 624 | Error: |
| 625 | * MACH,MDEP: no error is returned |
| 626 | * UNIX: the carry flag indicates success or failure |
| 627 | |
| 628 | nb here, sizeof(UWord) == sizeof(UInt) |
| 629 | */ |
| 630 | |
| 631 | __private_extern__ ULong |
| 632 | do_syscall_unix_WRK ( UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 633 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 634 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 635 | UWord syscall_no, /* 36(esp) */ |
| 636 | /*OUT*/UInt* errflag /* 40(esp) */ ); |
| 637 | // Unix syscall: 64-bit return in edx:eax, with LSB in eax |
| 638 | // error indicated by carry flag: clear=good, set=bad |
| 639 | asm(".private_extern _do_syscall_unix_WRK\n" |
| 640 | "_do_syscall_unix_WRK:\n" |
| 641 | " movl 40(%esp), %ecx \n" /* assume syscall success */ |
| 642 | " movl $0, (%ecx) \n" |
| 643 | " movl 36(%esp), %eax \n" |
| 644 | " int $0x80 \n" |
| 645 | " jnc 1f \n" /* jump if success */ |
| 646 | " movl 40(%esp), %ecx \n" /* syscall failed - set *errflag */ |
| 647 | " movl $1, (%ecx) \n" |
| 648 | " 1: ret \n" |
| 649 | ); |
| 650 | |
| 651 | __private_extern__ UInt |
| 652 | do_syscall_mach_WRK ( UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 653 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 654 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 655 | UWord syscall_no /* 36(esp) */ ); |
| 656 | // Mach trap: 32-bit result in %eax, no error flag |
| 657 | asm(".private_extern _do_syscall_mach_WRK\n" |
| 658 | "_do_syscall_mach_WRK:\n" |
| 659 | " movl 36(%esp), %eax \n" |
| 660 | " int $0x81 \n" |
| 661 | " ret \n" |
| 662 | ); |
| 663 | |
| 664 | __private_extern__ UInt |
| 665 | do_syscall_mdep_WRK ( UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 666 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 667 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 668 | UWord syscall_no /* 36(esp) */ ); |
| 669 | // mdep trap: 32-bit result in %eax, no error flag |
| 670 | asm( |
| 671 | ".private_extern _do_syscall_mdep_WRK\n" |
| 672 | "_do_syscall_mdep_WRK:\n" |
| 673 | " movl 36(%esp), %eax \n" |
| 674 | " int $0x82 \n" |
| 675 | " ret \n" |
| 676 | ); |
| 677 | |
| 678 | |
| 679 | #elif defined(VGP_amd64_darwin) |
| 680 | |
| 681 | /* Incoming args (syscall number + up to 8 args) come in registers and stack |
| 682 | |
| 683 | The kernel's syscall calling convention is: |
| 684 | * the syscall number goes in rax |
| 685 | * the args are passed to the syscall in registers and the stack |
| 686 | * the call instruction is 'syscall' |
| 687 | Return value: |
| 688 | * MACH,MDEP: the return value comes back in rax |
| 689 | * UNIX: the return value comes back in rdx:rax (hi64:lo64) |
| 690 | Error: |
| 691 | * MACH,MDEP: no error is returned |
| 692 | * UNIX: the carry flag indicates success or failure |
| 693 | |
| 694 | nb here, sizeof(UWord) == sizeof(ULong) |
| 695 | */ |
| 696 | |
| 697 | __private_extern__ UWord |
| 698 | do_syscall_unix_WRK ( UWord a1, UWord a2, UWord a3, /* rdi, rsi, rdx */ |
| 699 | UWord a4, UWord a5, UWord a6, /* rcx, r8, r9 */ |
| 700 | UWord a7, UWord a8, /* 8(rsp), 16(rsp) */ |
| 701 | UWord syscall_no, /* 24(rsp) */ |
| 702 | /*OUT*/ULong* errflag, /* 32(rsp) */ |
| 703 | /*OUT*/ULong* res2 ); /* 40(rsp) */ |
| 704 | // Unix syscall: 128-bit return in rax:rdx, with LSB in rax |
| 705 | // error indicated by carry flag: clear=good, set=bad |
| 706 | asm(".private_extern _do_syscall_unix_WRK\n" |
| 707 | "_do_syscall_unix_WRK:\n" |
| 708 | " movq %rcx, %r10 \n" /* pass rcx in r10 instead */ |
| 709 | " movq 32(%rsp), %rax \n" /* assume syscall success */ |
| 710 | " movq $0, (%rax) \n" |
| 711 | " movq 24(%rsp), %rax \n" /* load syscall_no */ |
| 712 | " syscall \n" |
| 713 | " jnc 1f \n" /* jump if success */ |
| 714 | " movq 32(%rsp), %rcx \n" /* syscall failed - set *errflag */ |
| 715 | " movq $1, (%rcx) \n" |
| 716 | " 1: movq 40(%rsp), %rcx \n" /* save 2nd result word */ |
| 717 | " movq %rdx, (%rcx) \n" |
| 718 | " retq \n" /* return 1st result word */ |
| 719 | ); |
| 720 | |
| 721 | __private_extern__ UWord |
| 722 | do_syscall_mach_WRK ( UWord a1, UWord a2, UWord a3, /* rdi, rsi, rdx */ |
| 723 | UWord a4, UWord a5, UWord a6, /* rcx, r8, r9 */ |
| 724 | UWord a7, UWord a8, /* 8(rsp), 16(rsp) */ |
| 725 | UWord syscall_no ); /* 24(rsp) */ |
| 726 | // Mach trap: 64-bit result, no error flag |
| 727 | asm(".private_extern _do_syscall_mach_WRK\n" |
| 728 | "_do_syscall_mach_WRK:\n" |
| 729 | " movq %rcx, %r10 \n" /* pass rcx in r10 instead */ |
| 730 | " movq 24(%rsp), %rax \n" /* load syscall_no */ |
| 731 | " syscall \n" |
| 732 | " retq \n" |
| 733 | ); |
| 734 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 735 | #elif defined(VGP_s390x_linux) |
| 736 | |
| 737 | static UWord do_syscall_WRK ( |
| 738 | UWord syscall_no, |
| 739 | UWord arg1, UWord arg2, UWord arg3, |
| 740 | UWord arg4, UWord arg5, UWord arg6 |
| 741 | ) |
| 742 | { |
| 743 | register UWord __arg1 asm("2") = arg1; |
| 744 | register UWord __arg2 asm("3") = arg2; |
| 745 | register UWord __arg3 asm("4") = arg3; |
| 746 | register UWord __arg4 asm("5") = arg4; |
| 747 | register UWord __arg5 asm("6") = arg5; |
| 748 | register UWord __arg6 asm("7") = arg6; |
| 749 | register ULong __svcres asm("2"); |
| 750 | |
| 751 | __asm__ __volatile__ ( |
| 752 | "lgr %%r1,%1\n\t" |
| 753 | "svc 0\n\t" |
| 754 | : "=d" (__svcres) |
| 755 | : "a" (syscall_no), |
| 756 | "0" (__arg1), |
| 757 | "d" (__arg2), |
| 758 | "d" (__arg3), |
| 759 | "d" (__arg4), |
| 760 | "d" (__arg5), |
| 761 | "d" (__arg6) |
| 762 | : "1", "cc", "memory"); |
| 763 | |
| 764 | return (UWord) (__svcres); |
| 765 | } |
| 766 | |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 767 | #elif defined(VGP_mips32_linux) |
| 768 | /* Incoming args (syscall number + up to 6 args) come in a0 - a3 and stack. |
| 769 | |
| 770 | The syscall number goes in v0. The args are passed to the syscall in |
| 771 | the regs a0 - a3 and stack, i.e. the kernel's syscall calling convention. |
| 772 | |
| 773 | (a3 != 0) flags an error. |
| 774 | We return the syscall return value in v0. |
| 775 | MIPS version |
| 776 | */ |
| 777 | extern int do_syscall_WRK ( |
| 778 | int a1, int a2, int a3, |
| 779 | int a4, int a5, int a6, int syscall_no, UWord *err, |
| 780 | UWord *valHi, UWord* valLo |
| 781 | ); |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame] | 782 | asm ( |
| 783 | ".text \n\t" |
| 784 | ".globl do_syscall_WRK \n\t" |
| 785 | ".type do_syscall_WRK, @function \n\t" |
| 786 | ".set push \n\t" |
| 787 | ".set noreorder \n\t" |
| 788 | "do_syscall_WRK: \n\t" |
| 789 | " lw $2, 24($29) \n\t" |
| 790 | " syscall \n\t" |
| 791 | " lw $8, 28($29) \n\t" |
| 792 | " sw $7, ($8) \n\t" |
| 793 | " lw $8, 32($29) \n\t" |
| 794 | " sw $3, ($8) \n\t" /* store valHi */ |
| 795 | " lw $8, 36($29) \n\t" |
| 796 | " jr $31 \n\t" |
| 797 | " sw $2, ($8) \n\t" /* store valLo */ |
| 798 | ".size do_syscall_WRK, .-do_syscall_WRK \n\t" |
| 799 | ".set pop \n\t" |
| 800 | ".previous \n\t" |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 801 | ); |
| 802 | |
petarj | 4df0bfc | 2013-02-27 23:17:33 +0000 | [diff] [blame] | 803 | #elif defined(VGP_mips64_linux) |
| 804 | extern UWord do_syscall_WRK ( UWord a1, UWord a2, UWord a3, UWord a4, UWord a5, |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame] | 805 | UWord a6, UWord syscall_no, ULong* V1_A3_val ); |
petarj | 4df0bfc | 2013-02-27 23:17:33 +0000 | [diff] [blame] | 806 | asm ( |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame] | 807 | ".text \n\t" |
| 808 | ".globl do_syscall_WRK \n\t" |
| 809 | ".type do_syscall_WRK, @function \n\t" |
| 810 | ".set push \n\t" |
| 811 | ".set noreorder \n\t" |
| 812 | "do_syscall_WRK: \n\t" |
| 813 | " daddiu $29, $29, -8 \n\t" |
| 814 | " sd $11, 0($29) \n\t" |
| 815 | " move $2, $10 \n\t" |
| 816 | " syscall \n\t" |
| 817 | " ld $11, 0($29) \n\t" |
| 818 | " daddiu $29, $29, 8 \n\t" |
| 819 | " sd $3, 0($11) \n\t" /* store v1 in last param */ |
| 820 | " jr $31 \n\t" |
| 821 | " sd $7, 8($11) \n\t" /* store a3 in last param */ |
| 822 | ".size do_syscall_WRK, .-do_syscall_WRK \n\t" |
| 823 | ".set pop \n\t" |
| 824 | ".previous \n\t" |
petarj | 4df0bfc | 2013-02-27 23:17:33 +0000 | [diff] [blame] | 825 | ); |
| 826 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 827 | #elif defined(VGP_x86_solaris) |
| 828 | |
| 829 | extern ULong |
| 830 | do_syscall_WRK(UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 831 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 832 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 833 | UWord syscall_no, /* 36(esp) */ |
| 834 | /*OUT*/UInt *errflag); /* 40(esp) */ |
| 835 | /* Classic unix syscall.. parameters on the stack, an unused (by the kernel) |
| 836 | return address at 0(esp), a sysno in eax, a result in edx:eax, the carry |
| 837 | flag set on error. */ |
| 838 | __asm__ ( |
| 839 | ".text\n" |
| 840 | ".globl do_syscall_WRK\n" |
| 841 | "do_syscall_WRK:\n" |
| 842 | " movl 40(%esp), %ecx\n" /* assume syscall success */ |
| 843 | " movl $0, (%ecx)\n" |
| 844 | " movl 36(%esp), %eax\n" |
| 845 | " int $0x91\n" |
| 846 | " jnc 1f\n" /* jump if success */ |
| 847 | " movl 40(%esp), %ecx\n" /* syscall failed - set *errflag */ |
| 848 | " movl $1, (%ecx)\n" |
| 849 | "1: ret\n" |
| 850 | ".previous\n" |
| 851 | ); |
| 852 | |
| 853 | extern ULong |
| 854 | do_syscall_fast_WRK(UWord syscall_no); /* 4(esp) */ |
| 855 | /* Fasttrap syscall.. no parameters, a sysno in eax, a result in edx:eax, |
| 856 | never fails (if the sysno is valid). */ |
| 857 | __asm__ ( |
| 858 | ".text\n" |
| 859 | ".globl do_syscall_fast_WRK\n" |
| 860 | "do_syscall_fast_WRK:\n" |
| 861 | " movl 4(%esp), %eax\n" |
| 862 | " int $0xD2\n" |
| 863 | " ret\n" |
| 864 | ".previous\n" |
| 865 | ); |
| 866 | |
| 867 | #elif defined(VGP_amd64_solaris) |
| 868 | |
| 869 | extern ULong |
| 870 | do_syscall_WRK(UWord a1, UWord a2, UWord a3, /* rdi, rsi, rdx */ |
| 871 | UWord a4, UWord a5, UWord a6, /* rcx, r8, r9 */ |
| 872 | UWord a7, UWord a8, /* 8(rsp), 16(rsp) */ |
| 873 | UWord syscall_no, /* 24(rsp) */ |
| 874 | /*OUT*/ULong *errflag, /* 32(rsp) */ |
| 875 | /*OUT*/ULong *res2); /* 40(rsp) */ |
| 876 | /* First 6 parameters in registers rdi, rsi, rdx, r10, r8, r9, next |
| 877 | 2 parameters on the stack, an unused (by the kernel) return address at |
| 878 | 0(rsp), a sysno in rax, a result in rdx:rax, the carry flag set on |
| 879 | error. */ |
| 880 | __asm__ ( |
| 881 | ".text\n" |
| 882 | ".globl do_syscall_WRK\n" |
| 883 | "do_syscall_WRK:\n" |
| 884 | " movq %rcx, %r10\n" /* pass rcx in r10 instead */ |
| 885 | " movq 32(%rsp), %rcx\n" /* assume syscall success */ |
| 886 | " movq $0, (%rcx)\n" |
| 887 | " movq 24(%rsp), %rax\n" |
| 888 | " syscall\n" |
| 889 | " jnc 1f\n" /* jump if success */ |
| 890 | " movq 32(%rsp), %rcx\n" /* syscall failed - set *errflag */ |
| 891 | " movq $1, (%rcx)\n" |
| 892 | "1: movq 40(%rsp), %rcx\n" /* save 2nd result word */ |
| 893 | " movq %rdx, (%rcx)\n" |
| 894 | " ret\n" |
| 895 | ".previous\n" |
| 896 | ); |
| 897 | |
| 898 | extern ULong |
| 899 | do_syscall_fast_WRK(UWord syscall_no, /* rdi */ |
| 900 | /*OUT*/ULong *res2); /* rsi */ |
| 901 | /* Fasttrap syscall.. no parameters, a sysno in rax, a result in rdx:rax, |
| 902 | never fails (if the sysno is valid). */ |
| 903 | __asm__ ( |
| 904 | ".text\n" |
| 905 | ".globl do_syscall_fast_WRK\n" |
| 906 | "do_syscall_fast_WRK:\n" |
| 907 | " movq %rdi, %rax\n" |
| 908 | " int $0xD2\n" |
| 909 | " movq %rdx, (%rsi)\n" /* save 2nd result word */ |
| 910 | " ret\n" |
| 911 | ".previous\n" |
| 912 | ); |
| 913 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 914 | #else |
| 915 | # error Unknown platform |
| 916 | #endif |
| 917 | |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 918 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 919 | /* Finally, the generic code. This sends the call to the right |
| 920 | helper. */ |
| 921 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 922 | SysRes VG_(do_syscall) ( UWord sysno, UWord a1, UWord a2, UWord a3, |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 923 | UWord a4, UWord a5, UWord a6, |
| 924 | UWord a7, UWord a8 ) |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 925 | { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 926 | # if defined(VGP_x86_linux) |
| 927 | UWord val = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 928 | return VG_(mk_SysRes_x86_linux)( val ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 929 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 930 | # elif defined(VGP_amd64_linux) |
| 931 | UWord val = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 932 | return VG_(mk_SysRes_amd64_linux)( val ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 933 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 934 | # elif defined(VGP_ppc32_linux) |
| 935 | ULong ret = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 936 | UInt val = (UInt)(ret>>32); |
| 937 | UInt cr0so = (UInt)(ret); |
| 938 | return VG_(mk_SysRes_ppc32_linux)( val, cr0so ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 939 | |
carll | cae0cc2 | 2014-08-07 23:17:29 +0000 | [diff] [blame] | 940 | # elif defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 941 | ULong argblock[7]; |
| 942 | argblock[0] = sysno; |
| 943 | argblock[1] = a1; |
| 944 | argblock[2] = a2; |
| 945 | argblock[3] = a3; |
| 946 | argblock[4] = a4; |
| 947 | argblock[5] = a5; |
| 948 | argblock[6] = a6; |
| 949 | do_syscall_WRK( &argblock[0] ); |
| 950 | return VG_(mk_SysRes_ppc64_linux)( argblock[0], argblock[1] ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 951 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 952 | # elif defined(VGP_arm_linux) |
| 953 | UWord val = do_syscall_WRK(a1,a2,a3,a4,a5,a6,sysno); |
| 954 | return VG_(mk_SysRes_arm_linux)( val ); |
| 955 | |
sewardj | f0c1250 | 2014-01-12 12:54:00 +0000 | [diff] [blame] | 956 | # elif defined(VGP_arm64_linux) |
| 957 | UWord val = do_syscall_WRK(a1,a2,a3,a4,a5,a6,sysno); |
| 958 | return VG_(mk_SysRes_arm64_linux)( val ); |
| 959 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 960 | # elif defined(VGP_x86_darwin) |
| 961 | UInt wLO = 0, wHI = 0, err = 0; |
| 962 | ULong u64; |
| 963 | UChar scclass = VG_DARWIN_SYSNO_CLASS(sysno); |
| 964 | switch (scclass) { |
| 965 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 966 | u64 = do_syscall_unix_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 967 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno), &err); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 968 | wLO = (UInt)u64; |
| 969 | wHI = (UInt)(u64 >> 32); |
| 970 | break; |
| 971 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 972 | wLO = do_syscall_mach_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 973 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno)); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 974 | err = 0; |
| 975 | break; |
| 976 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 977 | wLO = do_syscall_mdep_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 978 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno)); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 979 | err = 0; |
| 980 | break; |
| 981 | default: |
| 982 | vg_assert(0); |
| 983 | break; |
| 984 | } |
| 985 | return VG_(mk_SysRes_x86_darwin)( scclass, err ? True : False, wHI, wLO ); |
| 986 | |
| 987 | # elif defined(VGP_amd64_darwin) |
| 988 | ULong wLO = 0, wHI = 0, err = 0; |
| 989 | UChar scclass = VG_DARWIN_SYSNO_CLASS(sysno); |
| 990 | switch (scclass) { |
| 991 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 992 | wLO = do_syscall_unix_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 993 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno), &err, &wHI); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 994 | break; |
| 995 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 996 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 997 | wLO = do_syscall_mach_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 998 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno)); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 999 | err = 0; |
| 1000 | break; |
| 1001 | default: |
| 1002 | vg_assert(0); |
| 1003 | break; |
| 1004 | } |
| 1005 | return VG_(mk_SysRes_amd64_darwin)( scclass, err ? True : False, wHI, wLO ); |
| 1006 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 1007 | #elif defined(VGP_s390x_linux) |
| 1008 | UWord val; |
| 1009 | |
| 1010 | if (sysno == __NR_mmap) { |
| 1011 | ULong argbuf[6]; |
| 1012 | |
| 1013 | argbuf[0] = a1; |
| 1014 | argbuf[1] = a2; |
| 1015 | argbuf[2] = a3; |
| 1016 | argbuf[3] = a4; |
| 1017 | argbuf[4] = a5; |
| 1018 | argbuf[5] = a6; |
| 1019 | val = do_syscall_WRK(sysno,(UWord)&argbuf[0],0,0,0,0,0); |
| 1020 | } else { |
| 1021 | val = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 1022 | } |
| 1023 | |
| 1024 | return VG_(mk_SysRes_s390x_linux)( val ); |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 1025 | |
| 1026 | #elif defined(VGP_mips32_linux) |
| 1027 | UWord err = 0; |
| 1028 | UWord valHi = 0; |
| 1029 | UWord valLo = 0; |
| 1030 | (void) do_syscall_WRK(a1,a2,a3,a4,a5,a6, sysno,&err,&valHi,&valLo); |
| 1031 | return VG_(mk_SysRes_mips32_linux)( valLo, valHi, (ULong)err ); |
petarj | 4df0bfc | 2013-02-27 23:17:33 +0000 | [diff] [blame] | 1032 | |
| 1033 | #elif defined(VGP_mips64_linux) |
| 1034 | ULong v1_a3[2]; |
| 1035 | v1_a3[0] = 0xFF00; |
| 1036 | v1_a3[1] = 0xFF00; |
| 1037 | ULong V0 = do_syscall_WRK(a1,a2,a3,a4,a5,a6,sysno,v1_a3); |
| 1038 | ULong V1 = (ULong)v1_a3[0]; |
| 1039 | ULong A3 = (ULong)v1_a3[1]; |
| 1040 | return VG_(mk_SysRes_mips64_linux)( V0, V1, A3 ); |
| 1041 | |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 1042 | # elif defined(VGP_x86_solaris) |
| 1043 | UInt val, val2, err = False; |
| 1044 | Bool restart; |
| 1045 | ULong u64; |
| 1046 | UChar ssclass = VG_SOLARIS_SYSNO_CLASS(sysno); |
| 1047 | |
| 1048 | switch (ssclass) { |
| 1049 | case VG_SOLARIS_SYSCALL_CLASS_CLASSIC: |
| 1050 | /* The Solaris kernel does not restart syscalls automatically so it |
| 1051 | is done here. */ |
| 1052 | do { |
| 1053 | u64 = do_syscall_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
| 1054 | VG_SOLARIS_SYSNO_INDEX(sysno), &err); |
| 1055 | val = (UInt)u64; |
| 1056 | restart = err && (val == VKI_EINTR || val == VKI_ERESTART); |
| 1057 | } while (restart); |
| 1058 | break; |
| 1059 | case VG_SOLARIS_SYSCALL_CLASS_FASTTRAP: |
| 1060 | u64 = do_syscall_fast_WRK(VG_SOLARIS_SYSNO_INDEX(sysno)); |
| 1061 | break; |
| 1062 | default: |
| 1063 | vg_assert(0); |
| 1064 | break; |
| 1065 | } |
| 1066 | |
| 1067 | val = (UInt)u64; |
| 1068 | val2 = (UInt)(u64 >> 32); |
| 1069 | return VG_(mk_SysRes_x86_solaris)(err ? True : False, val, |
| 1070 | err ? 0 : val2); |
| 1071 | |
| 1072 | # elif defined(VGP_amd64_solaris) |
| 1073 | ULong val, val2, err = False; |
| 1074 | Bool restart; |
| 1075 | UChar ssclass = VG_SOLARIS_SYSNO_CLASS(sysno); |
| 1076 | |
| 1077 | switch (ssclass) { |
| 1078 | case VG_SOLARIS_SYSCALL_CLASS_CLASSIC: |
| 1079 | /* The Solaris kernel does not restart syscalls automatically so it |
| 1080 | is done here. */ |
| 1081 | do { |
| 1082 | val = do_syscall_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
| 1083 | VG_SOLARIS_SYSNO_INDEX(sysno), &err, &val2); |
| 1084 | restart = err && (val == VKI_EINTR || val == VKI_ERESTART); |
| 1085 | } while (restart); |
| 1086 | break; |
| 1087 | case VG_SOLARIS_SYSCALL_CLASS_FASTTRAP: |
| 1088 | val = do_syscall_fast_WRK(VG_SOLARIS_SYSNO_INDEX(sysno), &val2); |
| 1089 | break; |
| 1090 | default: |
| 1091 | vg_assert(0); |
| 1092 | break; |
| 1093 | } |
| 1094 | |
| 1095 | return VG_(mk_SysRes_amd64_solaris)(err ? True : False, val, |
| 1096 | err ? 0 : val2); |
| 1097 | |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 1098 | #else |
| 1099 | # error Unknown platform |
| 1100 | #endif |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 1101 | } |
| 1102 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1103 | /* --------------------------------------------------------------------- |
| 1104 | Names of errors. |
| 1105 | ------------------------------------------------------------------ */ |
| 1106 | |
| 1107 | /* Return a string which gives the name of an error value. Note, |
| 1108 | unlike the standard C syserror fn, the returned string is not |
| 1109 | malloc-allocated or writable -- treat it as a constant. |
| 1110 | TODO: implement this properly. */ |
| 1111 | |
| 1112 | const HChar* VG_(strerror) ( UWord errnum ) |
| 1113 | { |
| 1114 | switch (errnum) { |
florian | 5945164 | 2011-12-24 21:50:53 +0000 | [diff] [blame] | 1115 | case VKI_EPERM: return "Operation not permitted"; |
| 1116 | case VKI_ENOENT: return "No such file or directory"; |
| 1117 | case VKI_ESRCH: return "No such process"; |
| 1118 | case VKI_EINTR: return "Interrupted system call"; |
| 1119 | case VKI_EIO: return "Input/output error"; |
| 1120 | case VKI_ENXIO: return "No such device or address"; |
| 1121 | case VKI_E2BIG: return "Argument list too long"; |
| 1122 | case VKI_ENOEXEC: return "Exec format error"; |
| 1123 | case VKI_EBADF: return "Bad file descriptor"; |
| 1124 | case VKI_ECHILD: return "No child processes"; |
| 1125 | case VKI_EAGAIN: return "Resource temporarily unavailable"; |
| 1126 | case VKI_ENOMEM: return "Cannot allocate memory"; |
| 1127 | case VKI_EACCES: return "Permission denied"; |
| 1128 | case VKI_EFAULT: return "Bad address"; |
| 1129 | case VKI_ENOTBLK: return "Block device required"; |
| 1130 | case VKI_EBUSY: return "Device or resource busy"; |
| 1131 | case VKI_EEXIST: return "File exists"; |
| 1132 | case VKI_EXDEV: return "Invalid cross-device link"; |
| 1133 | case VKI_ENODEV: return "No such device"; |
| 1134 | case VKI_ENOTDIR: return "Not a directory"; |
| 1135 | case VKI_EISDIR: return "Is a directory"; |
| 1136 | case VKI_EINVAL: return "Invalid argument"; |
| 1137 | case VKI_ENFILE: return "Too many open files in system"; |
| 1138 | case VKI_EMFILE: return "Too many open files"; |
| 1139 | case VKI_ENOTTY: return "Inappropriate ioctl for device"; |
| 1140 | case VKI_ETXTBSY: return "Text file busy"; |
| 1141 | case VKI_EFBIG: return "File too large"; |
| 1142 | case VKI_ENOSPC: return "No space left on device"; |
| 1143 | case VKI_ESPIPE: return "Illegal seek"; |
| 1144 | case VKI_EROFS: return "Read-only file system"; |
| 1145 | case VKI_EMLINK: return "Too many links"; |
| 1146 | case VKI_EPIPE: return "Broken pipe"; |
| 1147 | case VKI_EDOM: return "Numerical argument out of domain"; |
| 1148 | case VKI_ERANGE: return "Numerical result out of range"; |
| 1149 | |
| 1150 | case VKI_ENOSYS: return "Function not implemented"; |
| 1151 | case VKI_EOVERFLOW: return "Value too large for defined data type"; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 1152 | # if defined(VKI_ERESTARTSYS) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1153 | case VKI_ERESTARTSYS: return "ERESTARTSYS"; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 1154 | # endif |
florian | 5945164 | 2011-12-24 21:50:53 +0000 | [diff] [blame] | 1155 | default: return "VG_(strerror): unknown error"; |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 1156 | } |
| 1157 | } |
| 1158 | |
| 1159 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 1160 | /*--------------------------------------------------------------------*/ |
florian | 5945164 | 2011-12-24 21:50:53 +0000 | [diff] [blame] | 1161 | /*--- end ---*/ |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 1162 | /*--------------------------------------------------------------------*/ |