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 | |
sewardj | 03f8d3f | 2012-08-05 15:46:46 +0000 | [diff] [blame] | 10 | Copyright (C) 2000-2012 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 | #if defined(VGO_linux) |
| 42 | |
| 43 | /* Make a SysRes value from a syscall return value. This is |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 44 | Linux-specific. |
| 45 | |
| 46 | From: |
| 47 | http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/ |
| 48 | linux/i386/sysdep.h? |
| 49 | rev=1.28&content-type=text/x-cvsweb-markup&cvsroot=glibc |
| 50 | |
| 51 | Linux uses a negative return value to indicate syscall errors, |
| 52 | unlike most Unices, which use the condition codes' carry flag. |
| 53 | |
| 54 | Since version 2.1 the return value of a system call might be |
| 55 | negative even if the call succeeded. E.g., the 'lseek' system call |
| 56 | might return a large offset. Therefore we must not anymore test |
| 57 | for < 0, but test for a real error by making sure the value in %eax |
| 58 | is a real error number. Linus said he will make sure the no |
| 59 | syscall returns a value in -1 .. -4095 as a valid result so we can |
| 60 | safely test with -4095. |
| 61 | */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 62 | |
| 63 | SysRes VG_(mk_SysRes_x86_linux) ( Int val ) { |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 64 | SysRes res; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 65 | res._valEx = 0; /* unused except on mips-linux */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 66 | res._isError = val >= -4095 && val <= -1; |
| 67 | if (res._isError) { |
| 68 | res._val = (UInt)(-val); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 69 | } else { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 70 | res._val = (UInt)val; |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 71 | } |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 72 | return res; |
| 73 | } |
| 74 | |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 75 | /* Similarly .. */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 76 | SysRes VG_(mk_SysRes_amd64_linux) ( Long val ) { |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 77 | SysRes res; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 78 | res._valEx = 0; /* unused except on mips-linux */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 79 | res._isError = val >= -4095 && val <= -1; |
| 80 | if (res._isError) { |
| 81 | res._val = (ULong)(-val); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 82 | } else { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 83 | res._val = (ULong)val; |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 84 | } |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 85 | return res; |
| 86 | } |
| 87 | |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 88 | /* 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] | 89 | /* Note this must be in the bottom bit of the second arg */ |
| 90 | SysRes VG_(mk_SysRes_ppc32_linux) ( UInt val, UInt cr0so ) { |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 91 | SysRes res; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 92 | res._valEx = 0; /* unused except on mips-linux */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 93 | res._isError = (cr0so & 1) != 0; |
| 94 | res._val = val; |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 95 | return res; |
| 96 | } |
| 97 | |
sewardj | 38a88b7 | 2006-01-02 16:32:10 +0000 | [diff] [blame] | 98 | /* As per ppc32 version, cr0.so must be in l.s.b. of 2nd arg */ |
| 99 | SysRes VG_(mk_SysRes_ppc64_linux) ( ULong val, ULong cr0so ) { |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 100 | SysRes res; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 101 | res._valEx = 0; /* unused except on mips-linux */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 102 | res._isError = (cr0so & 1) != 0; |
| 103 | res._val = val; |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 104 | return res; |
| 105 | } |
| 106 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 107 | SysRes VG_(mk_SysRes_s390x_linux) ( Long val ) { |
| 108 | SysRes res; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 109 | res._valEx = 0; /* unused except on mips-linux */ |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 110 | res._isError = val >= -4095 && val <= -1; |
| 111 | if (res._isError) { |
| 112 | res._val = -val; |
| 113 | } else { |
| 114 | res._val = val; |
| 115 | } |
| 116 | return res; |
| 117 | } |
| 118 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 119 | SysRes VG_(mk_SysRes_arm_linux) ( Int val ) { |
| 120 | SysRes res; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 121 | res._valEx = 0; /* unused except on mips-linux */ |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 122 | res._isError = val >= -4095 && val <= -1; |
| 123 | if (res._isError) { |
| 124 | res._val = (UInt)(-val); |
| 125 | } else { |
| 126 | res._val = (UInt)val; |
| 127 | } |
| 128 | return res; |
| 129 | } |
| 130 | |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 131 | /* MIPS uses a3 != 0 to flag an error */ |
| 132 | SysRes VG_(mk_SysRes_mips32_linux) ( UWord v0, UWord v1, UWord a3 ) { |
| 133 | SysRes res; |
| 134 | res._isError = (a3 != (UWord)0); |
| 135 | res._val = v0; |
| 136 | res._valEx = v1; |
| 137 | return res; |
| 138 | } |
| 139 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 140 | /* Generic constructors. */ |
| 141 | SysRes VG_(mk_SysRes_Error) ( UWord err ) { |
| 142 | SysRes r; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 143 | r._valEx = 0; /* unused except on mips-linux */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 144 | r._isError = True; |
| 145 | r._val = err; |
| 146 | return r; |
| 147 | } |
| 148 | |
| 149 | SysRes VG_(mk_SysRes_Success) ( UWord res ) { |
| 150 | SysRes r; |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 151 | r._valEx = 0; /* unused except on mips-linux */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 152 | r._isError = False; |
| 153 | r._val = res; |
| 154 | return r; |
| 155 | } |
| 156 | |
| 157 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 158 | #elif defined(VGO_darwin) |
| 159 | |
| 160 | /* Darwin: Some syscalls return a double-word result. */ |
| 161 | SysRes VG_(mk_SysRes_x86_darwin) ( UChar scclass, Bool isErr, |
| 162 | UInt wHI, UInt wLO ) |
| 163 | { |
| 164 | SysRes res; |
| 165 | res._wHI = 0; |
| 166 | res._wLO = 0; |
| 167 | res._mode = 0; /* invalid */ |
| 168 | vg_assert(isErr == False || isErr == True); |
| 169 | vg_assert(sizeof(UWord) == sizeof(UInt)); |
| 170 | switch (scclass) { |
| 171 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 172 | res._wLO = wLO; |
| 173 | res._wHI = wHI; |
| 174 | res._mode = isErr ? SysRes_UNIX_ERR : SysRes_UNIX_OK; |
| 175 | break; |
| 176 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 177 | vg_assert(!isErr); |
| 178 | vg_assert(wHI == 0); |
| 179 | res._wLO = wLO; |
| 180 | res._mode = SysRes_MACH; |
| 181 | break; |
| 182 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 183 | vg_assert(!isErr); |
| 184 | vg_assert(wHI == 0); |
| 185 | res._wLO = wLO; |
| 186 | res._mode = SysRes_MDEP; |
| 187 | break; |
| 188 | default: |
| 189 | vg_assert(0); |
| 190 | } |
| 191 | return res; |
| 192 | } |
| 193 | |
| 194 | SysRes VG_(mk_SysRes_amd64_darwin) ( UChar scclass, Bool isErr, |
| 195 | ULong wHI, ULong wLO ) |
| 196 | { |
| 197 | SysRes res; |
| 198 | res._wHI = 0; |
| 199 | res._wLO = 0; |
| 200 | res._mode = 0; /* invalid */ |
| 201 | vg_assert(isErr == False || isErr == True); |
| 202 | vg_assert(sizeof(UWord) == sizeof(ULong)); |
| 203 | switch (scclass) { |
| 204 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 205 | res._wLO = wLO; |
| 206 | res._wHI = wHI; |
| 207 | res._mode = isErr ? SysRes_UNIX_ERR : SysRes_UNIX_OK; |
| 208 | break; |
| 209 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 210 | vg_assert(!isErr); |
| 211 | vg_assert(wHI == 0); |
| 212 | res._wLO = wLO; |
| 213 | res._mode = SysRes_MACH; |
| 214 | break; |
| 215 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 216 | vg_assert(!isErr); |
| 217 | vg_assert(wHI == 0); |
| 218 | res._wLO = wLO; |
| 219 | res._mode = SysRes_MDEP; |
| 220 | break; |
| 221 | default: |
| 222 | vg_assert(0); |
| 223 | } |
| 224 | return res; |
| 225 | } |
| 226 | |
| 227 | /* Generic constructors. We assume (without checking if this makes |
| 228 | any sense, from the caller's point of view) that these are for the |
| 229 | UNIX style of syscall. */ |
| 230 | SysRes VG_(mk_SysRes_Error) ( UWord err ) { |
| 231 | SysRes r; |
| 232 | r._wHI = 0; |
| 233 | r._wLO = err; |
| 234 | r._mode = SysRes_UNIX_ERR; |
| 235 | return r; |
| 236 | } |
| 237 | |
| 238 | SysRes VG_(mk_SysRes_Success) ( UWord res ) { |
| 239 | SysRes r; |
| 240 | r._wHI = 0; |
| 241 | r._wLO = res; |
| 242 | r._mode = SysRes_UNIX_OK; |
| 243 | return r; |
| 244 | } |
| 245 | |
| 246 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 247 | #else |
| 248 | # error "Unknown OS" |
| 249 | #endif |
| 250 | |
| 251 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 252 | /* --------------------------------------------------------------------- |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 253 | VG_(do_syscall): A function for doing syscalls. |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 254 | ------------------------------------------------------------------ */ |
| 255 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 256 | #if defined(VGP_x86_linux) |
| 257 | /* Incoming args (syscall number + up to 6 args) come on the stack. |
| 258 | (ie. the C calling convention). |
| 259 | |
| 260 | The syscall number goes in %eax. The args are passed to the syscall in |
| 261 | the regs %ebx, %ecx, %edx, %esi, %edi, %ebp, ie. the kernel's syscall |
| 262 | calling convention. |
| 263 | |
| 264 | %eax gets the return value. Not sure which registers the kernel |
| 265 | clobbers, so we preserve all the callee-save regs (%esi, %edi, %ebx, |
| 266 | %ebp). |
| 267 | */ |
sewardj | 03d8aa8 | 2005-10-14 11:25:49 +0000 | [diff] [blame] | 268 | extern UWord do_syscall_WRK ( |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 269 | UWord syscall_no, |
| 270 | UWord a1, UWord a2, UWord a3, |
| 271 | UWord a4, UWord a5, UWord a6 |
| 272 | ); |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 273 | asm( |
sewardj | d9fc382 | 2005-11-18 23:50:43 +0000 | [diff] [blame] | 274 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 275 | ".globl do_syscall_WRK\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 276 | "do_syscall_WRK:\n" |
| 277 | " push %esi\n" |
| 278 | " push %edi\n" |
| 279 | " push %ebx\n" |
| 280 | " push %ebp\n" |
| 281 | " movl 16+ 4(%esp),%eax\n" |
| 282 | " movl 16+ 8(%esp),%ebx\n" |
| 283 | " movl 16+12(%esp),%ecx\n" |
| 284 | " movl 16+16(%esp),%edx\n" |
| 285 | " movl 16+20(%esp),%esi\n" |
| 286 | " movl 16+24(%esp),%edi\n" |
| 287 | " movl 16+28(%esp),%ebp\n" |
| 288 | " int $0x80\n" |
| 289 | " popl %ebp\n" |
| 290 | " popl %ebx\n" |
| 291 | " popl %edi\n" |
| 292 | " popl %esi\n" |
| 293 | " ret\n" |
sewardj | 2fedc64 | 2005-11-19 02:02:57 +0000 | [diff] [blame] | 294 | ".previous\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 295 | ); |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 296 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 297 | #elif defined(VGP_amd64_linux) |
| 298 | /* Incoming args (syscall number + up to 6 args) come in %rdi, %rsi, |
| 299 | %rdx, %rcx, %r8, %r9, and the last one on the stack (ie. the C |
| 300 | calling convention). |
| 301 | |
| 302 | The syscall number goes in %rax. The args are passed to the syscall in |
| 303 | the regs %rdi, %rsi, %rdx, %r10, %r8, %r9 (yes, really %r10, not %rcx), |
| 304 | ie. the kernel's syscall calling convention. |
| 305 | |
| 306 | %rax gets the return value. %rcx and %r11 are clobbered by the syscall; |
| 307 | no matter, they are caller-save (the syscall clobbers no callee-save |
| 308 | regs, so we don't have to do any register saving/restoring). |
| 309 | */ |
sewardj | 03d8aa8 | 2005-10-14 11:25:49 +0000 | [diff] [blame] | 310 | extern UWord do_syscall_WRK ( |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 311 | UWord syscall_no, |
| 312 | UWord a1, UWord a2, UWord a3, |
| 313 | UWord a4, UWord a5, UWord a6 |
| 314 | ); |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 315 | asm( |
sewardj | d9fc382 | 2005-11-18 23:50:43 +0000 | [diff] [blame] | 316 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 317 | ".globl do_syscall_WRK\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 318 | "do_syscall_WRK:\n" |
| 319 | /* Convert function calling convention --> syscall calling |
| 320 | convention */ |
| 321 | " movq %rdi, %rax\n" |
| 322 | " movq %rsi, %rdi\n" |
| 323 | " movq %rdx, %rsi\n" |
| 324 | " movq %rcx, %rdx\n" |
| 325 | " movq %r8, %r10\n" |
| 326 | " movq %r9, %r8\n" |
| 327 | " movq 8(%rsp), %r9\n" /* last arg from stack */ |
| 328 | " syscall\n" |
| 329 | " ret\n" |
sewardj | 2fedc64 | 2005-11-19 02:02:57 +0000 | [diff] [blame] | 330 | ".previous\n" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 331 | ); |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 332 | |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 333 | #elif defined(VGP_ppc32_linux) |
sewardj | 39a7c1d | 2005-11-24 03:54:38 +0000 | [diff] [blame] | 334 | /* Incoming args (syscall number + up to 6 args) come in %r3:%r9. |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 335 | |
| 336 | The syscall number goes in %r0. The args are passed to the syscall in |
| 337 | the regs %r3:%r8, i.e. the kernel's syscall calling convention. |
| 338 | |
| 339 | The %cr0.so bit flags an error. |
sewardj | 39a7c1d | 2005-11-24 03:54:38 +0000 | [diff] [blame] | 340 | We return the syscall return value in %r3, and the %cr0.so in |
| 341 | the lowest bit of %r4. |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 342 | We return a ULong, of which %r3 is the high word, and %r4 the low. |
| 343 | No callee-save regs are clobbered, so no saving/restoring is needed. |
| 344 | */ |
sewardj | 03d8aa8 | 2005-10-14 11:25:49 +0000 | [diff] [blame] | 345 | extern ULong do_syscall_WRK ( |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 346 | UWord syscall_no, |
| 347 | UWord a1, UWord a2, UWord a3, |
| 348 | UWord a4, UWord a5, UWord a6 |
| 349 | ); |
| 350 | asm( |
sewardj | d9fc382 | 2005-11-18 23:50:43 +0000 | [diff] [blame] | 351 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 352 | ".globl do_syscall_WRK\n" |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 353 | "do_syscall_WRK:\n" |
| 354 | " mr 0,3\n" |
| 355 | " mr 3,4\n" |
| 356 | " mr 4,5\n" |
| 357 | " mr 5,6\n" |
| 358 | " mr 6,7\n" |
| 359 | " mr 7,8\n" |
| 360 | " mr 8,9\n" |
| 361 | " sc\n" /* syscall: sets %cr0.so on error */ |
| 362 | " mfcr 4\n" /* %cr -> low word of return var */ |
| 363 | " rlwinm 4,4,4,31,31\n" /* rotate flag bit so to lsb, and mask it */ |
| 364 | " blr\n" /* and return */ |
sewardj | 2fedc64 | 2005-11-19 02:02:57 +0000 | [diff] [blame] | 365 | ".previous\n" |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 366 | ); |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 367 | |
| 368 | #elif defined(VGP_ppc64_linux) |
| 369 | /* Due to the need to return 65 bits of result, this is completely |
| 370 | different from the ppc32 case. The single arg register points to a |
| 371 | 7-word block containing the syscall # and the 6 args. The syscall |
| 372 | 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] | 373 | bottom bit of [1]. */ |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 374 | extern void do_syscall_WRK ( ULong* argblock ); |
| 375 | asm( |
cerion | 297c88f | 2005-12-22 15:53:12 +0000 | [diff] [blame] | 376 | ".align 2\n" |
| 377 | ".globl do_syscall_WRK\n" |
| 378 | ".section \".opd\",\"aw\"\n" |
| 379 | ".align 3\n" |
| 380 | "do_syscall_WRK:\n" |
| 381 | ".quad .do_syscall_WRK,.TOC.@tocbase,0\n" |
| 382 | ".previous\n" |
| 383 | ".type .do_syscall_WRK,@function\n" |
| 384 | ".globl .do_syscall_WRK\n" |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 385 | ".do_syscall_WRK:\n" |
| 386 | " std 3,-16(1)\n" /* stash arg */ |
| 387 | " ld 8, 48(3)\n" /* sc arg 6 */ |
| 388 | " ld 7, 40(3)\n" /* sc arg 5 */ |
| 389 | " ld 6, 32(3)\n" /* sc arg 4 */ |
| 390 | " ld 5, 24(3)\n" /* sc arg 3 */ |
| 391 | " ld 4, 16(3)\n" /* sc arg 2 */ |
| 392 | " ld 0, 0(3)\n" /* sc number */ |
| 393 | " ld 3, 8(3)\n" /* sc arg 1 */ |
| 394 | " sc\n" /* result in r3 and cr0.so */ |
| 395 | " ld 5,-16(1)\n" /* reacquire argblock ptr (r5 is caller-save) */ |
| 396 | " std 3,0(5)\n" /* argblock[0] = r3 */ |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 397 | " mfcr 3\n" |
| 398 | " srwi 3,3,28\n" |
| 399 | " andi. 3,3,1\n" |
| 400 | " std 3,8(5)\n" /* argblock[1] = cr0.s0 & 1 */ |
| 401 | " blr\n" |
sewardj | 2c48c7b | 2005-11-29 13:05:56 +0000 | [diff] [blame] | 402 | ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 403 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 404 | #elif defined(VGP_arm_linux) |
| 405 | /* I think the conventions are: |
| 406 | args in r0 r1 r2 r3 r4 r5 |
| 407 | sysno in r7 |
| 408 | return value in r0, w/ same conventions as x86-linux, viz r0 in |
| 409 | -4096 .. -1 is an error value. All other values are success |
| 410 | values. |
| 411 | */ |
| 412 | extern UWord do_syscall_WRK ( |
| 413 | UWord a1, UWord a2, UWord a3, |
| 414 | UWord a4, UWord a5, UWord a6, |
| 415 | UWord syscall_no |
| 416 | ); |
| 417 | asm( |
| 418 | ".text\n" |
philippe | 9fdca56 | 2012-04-16 22:06:47 +0000 | [diff] [blame] | 419 | ".globl do_syscall_WRK\n" |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 420 | "do_syscall_WRK:\n" |
| 421 | " push {r4, r5, r7}\n" |
| 422 | " ldr r4, [sp, #12]\n" |
| 423 | " ldr r5, [sp, #16]\n" |
| 424 | " ldr r7, [sp, #20]\n" |
| 425 | " svc 0x0\n" |
| 426 | " pop {r4, r5, r7}\n" |
| 427 | " bx lr\n" |
| 428 | ".previous\n" |
| 429 | ); |
| 430 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 431 | #elif defined(VGP_x86_darwin) |
| 432 | |
| 433 | /* Incoming args (syscall number + up to 8 args) come in on the stack |
| 434 | |
| 435 | The kernel's syscall calling convention is: |
| 436 | * the syscall number goes in eax |
| 437 | * the args are passed to the syscall on the stack, |
| 438 | pushed onto the stack R->L (that is, the usual x86 |
| 439 | calling conventions, with the leftmost arg at the lowest |
| 440 | address) |
| 441 | Call instruction: |
| 442 | * UNIX: sysenter |
| 443 | * UNIX: int $0x80 |
| 444 | * MACH: int $0x81 |
| 445 | * MDEP: int $0x82 |
| 446 | Note that the call type can be determined from the syscall number; |
| 447 | there is no need to inspect the actual instruction. Although obviously |
| 448 | the instruction must match. |
| 449 | Return value: |
| 450 | * MACH,MDEP: the return value comes back in eax |
| 451 | * UNIX: the return value comes back in edx:eax (hi32:lo32) |
| 452 | Error: |
| 453 | * MACH,MDEP: no error is returned |
| 454 | * UNIX: the carry flag indicates success or failure |
| 455 | |
| 456 | nb here, sizeof(UWord) == sizeof(UInt) |
| 457 | */ |
| 458 | |
| 459 | __private_extern__ ULong |
| 460 | do_syscall_unix_WRK ( UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 461 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 462 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 463 | UWord syscall_no, /* 36(esp) */ |
| 464 | /*OUT*/UInt* errflag /* 40(esp) */ ); |
| 465 | // Unix syscall: 64-bit return in edx:eax, with LSB in eax |
| 466 | // error indicated by carry flag: clear=good, set=bad |
| 467 | asm(".private_extern _do_syscall_unix_WRK\n" |
| 468 | "_do_syscall_unix_WRK:\n" |
| 469 | " movl 40(%esp), %ecx \n" /* assume syscall success */ |
| 470 | " movl $0, (%ecx) \n" |
| 471 | " movl 36(%esp), %eax \n" |
| 472 | " int $0x80 \n" |
| 473 | " jnc 1f \n" /* jump if success */ |
| 474 | " movl 40(%esp), %ecx \n" /* syscall failed - set *errflag */ |
| 475 | " movl $1, (%ecx) \n" |
| 476 | " 1: ret \n" |
| 477 | ); |
| 478 | |
| 479 | __private_extern__ UInt |
| 480 | do_syscall_mach_WRK ( UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 481 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 482 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 483 | UWord syscall_no /* 36(esp) */ ); |
| 484 | // Mach trap: 32-bit result in %eax, no error flag |
| 485 | asm(".private_extern _do_syscall_mach_WRK\n" |
| 486 | "_do_syscall_mach_WRK:\n" |
| 487 | " movl 36(%esp), %eax \n" |
| 488 | " int $0x81 \n" |
| 489 | " ret \n" |
| 490 | ); |
| 491 | |
| 492 | __private_extern__ UInt |
| 493 | do_syscall_mdep_WRK ( UWord a1, UWord a2, UWord a3, /* 4(esp)..12(esp) */ |
| 494 | UWord a4, UWord a5, UWord a6, /* 16(esp)..24(esp) */ |
| 495 | UWord a7, UWord a8, /* 28(esp)..32(esp) */ |
| 496 | UWord syscall_no /* 36(esp) */ ); |
| 497 | // mdep trap: 32-bit result in %eax, no error flag |
| 498 | asm( |
| 499 | ".private_extern _do_syscall_mdep_WRK\n" |
| 500 | "_do_syscall_mdep_WRK:\n" |
| 501 | " movl 36(%esp), %eax \n" |
| 502 | " int $0x82 \n" |
| 503 | " ret \n" |
| 504 | ); |
| 505 | |
| 506 | |
| 507 | #elif defined(VGP_amd64_darwin) |
| 508 | |
| 509 | /* Incoming args (syscall number + up to 8 args) come in registers and stack |
| 510 | |
| 511 | The kernel's syscall calling convention is: |
| 512 | * the syscall number goes in rax |
| 513 | * the args are passed to the syscall in registers and the stack |
| 514 | * the call instruction is 'syscall' |
| 515 | Return value: |
| 516 | * MACH,MDEP: the return value comes back in rax |
| 517 | * UNIX: the return value comes back in rdx:rax (hi64:lo64) |
| 518 | Error: |
| 519 | * MACH,MDEP: no error is returned |
| 520 | * UNIX: the carry flag indicates success or failure |
| 521 | |
| 522 | nb here, sizeof(UWord) == sizeof(ULong) |
| 523 | */ |
| 524 | |
| 525 | __private_extern__ UWord |
| 526 | do_syscall_unix_WRK ( UWord a1, UWord a2, UWord a3, /* rdi, rsi, rdx */ |
| 527 | UWord a4, UWord a5, UWord a6, /* rcx, r8, r9 */ |
| 528 | UWord a7, UWord a8, /* 8(rsp), 16(rsp) */ |
| 529 | UWord syscall_no, /* 24(rsp) */ |
| 530 | /*OUT*/ULong* errflag, /* 32(rsp) */ |
| 531 | /*OUT*/ULong* res2 ); /* 40(rsp) */ |
| 532 | // Unix syscall: 128-bit return in rax:rdx, with LSB in rax |
| 533 | // error indicated by carry flag: clear=good, set=bad |
| 534 | asm(".private_extern _do_syscall_unix_WRK\n" |
| 535 | "_do_syscall_unix_WRK:\n" |
| 536 | " movq %rcx, %r10 \n" /* pass rcx in r10 instead */ |
| 537 | " movq 32(%rsp), %rax \n" /* assume syscall success */ |
| 538 | " movq $0, (%rax) \n" |
| 539 | " movq 24(%rsp), %rax \n" /* load syscall_no */ |
| 540 | " syscall \n" |
| 541 | " jnc 1f \n" /* jump if success */ |
| 542 | " movq 32(%rsp), %rcx \n" /* syscall failed - set *errflag */ |
| 543 | " movq $1, (%rcx) \n" |
| 544 | " 1: movq 40(%rsp), %rcx \n" /* save 2nd result word */ |
| 545 | " movq %rdx, (%rcx) \n" |
| 546 | " retq \n" /* return 1st result word */ |
| 547 | ); |
| 548 | |
| 549 | __private_extern__ UWord |
| 550 | do_syscall_mach_WRK ( UWord a1, UWord a2, UWord a3, /* rdi, rsi, rdx */ |
| 551 | UWord a4, UWord a5, UWord a6, /* rcx, r8, r9 */ |
| 552 | UWord a7, UWord a8, /* 8(rsp), 16(rsp) */ |
| 553 | UWord syscall_no ); /* 24(rsp) */ |
| 554 | // Mach trap: 64-bit result, no error flag |
| 555 | asm(".private_extern _do_syscall_mach_WRK\n" |
| 556 | "_do_syscall_mach_WRK:\n" |
| 557 | " movq %rcx, %r10 \n" /* pass rcx in r10 instead */ |
| 558 | " movq 24(%rsp), %rax \n" /* load syscall_no */ |
| 559 | " syscall \n" |
| 560 | " retq \n" |
| 561 | ); |
| 562 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 563 | #elif defined(VGP_s390x_linux) |
| 564 | |
| 565 | static UWord do_syscall_WRK ( |
| 566 | UWord syscall_no, |
| 567 | UWord arg1, UWord arg2, UWord arg3, |
| 568 | UWord arg4, UWord arg5, UWord arg6 |
| 569 | ) |
| 570 | { |
| 571 | register UWord __arg1 asm("2") = arg1; |
| 572 | register UWord __arg2 asm("3") = arg2; |
| 573 | register UWord __arg3 asm("4") = arg3; |
| 574 | register UWord __arg4 asm("5") = arg4; |
| 575 | register UWord __arg5 asm("6") = arg5; |
| 576 | register UWord __arg6 asm("7") = arg6; |
| 577 | register ULong __svcres asm("2"); |
| 578 | |
| 579 | __asm__ __volatile__ ( |
| 580 | "lgr %%r1,%1\n\t" |
| 581 | "svc 0\n\t" |
| 582 | : "=d" (__svcres) |
| 583 | : "a" (syscall_no), |
| 584 | "0" (__arg1), |
| 585 | "d" (__arg2), |
| 586 | "d" (__arg3), |
| 587 | "d" (__arg4), |
| 588 | "d" (__arg5), |
| 589 | "d" (__arg6) |
| 590 | : "1", "cc", "memory"); |
| 591 | |
| 592 | return (UWord) (__svcres); |
| 593 | } |
| 594 | |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 595 | #elif defined(VGP_mips32_linux) |
| 596 | /* Incoming args (syscall number + up to 6 args) come in a0 - a3 and stack. |
| 597 | |
| 598 | The syscall number goes in v0. The args are passed to the syscall in |
| 599 | the regs a0 - a3 and stack, i.e. the kernel's syscall calling convention. |
| 600 | |
| 601 | (a3 != 0) flags an error. |
| 602 | We return the syscall return value in v0. |
| 603 | MIPS version |
| 604 | */ |
| 605 | extern int do_syscall_WRK ( |
| 606 | int a1, int a2, int a3, |
| 607 | int a4, int a5, int a6, int syscall_no, UWord *err, |
| 608 | UWord *valHi, UWord* valLo |
| 609 | ); |
| 610 | asm( |
| 611 | ".globl do_syscall_WRK\n" |
| 612 | ".ent do_syscall_WRK\n" |
| 613 | ".text\n" |
| 614 | "do_syscall_WRK:\n" |
| 615 | " lw $2, 24($29)\n" |
| 616 | " syscall\n" |
| 617 | " lw $8, 28($29)\n" |
| 618 | " sw $7, ($8)\n" |
| 619 | " lw $8, 32($29)\n" |
| 620 | " sw $3, ($8)\n" // store valHi |
| 621 | " lw $8, 36($29)\n" |
| 622 | " sw $2, ($8)\n" // store valLo |
| 623 | " jr $31\n" |
| 624 | " nop\n" |
| 625 | ".previous\n" |
| 626 | ".end do_syscall_WRK\n" |
| 627 | ); |
| 628 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 629 | #else |
| 630 | # error Unknown platform |
| 631 | #endif |
| 632 | |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 633 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 634 | /* Finally, the generic code. This sends the call to the right |
| 635 | helper. */ |
| 636 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 637 | SysRes VG_(do_syscall) ( UWord sysno, UWord a1, UWord a2, UWord a3, |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 638 | UWord a4, UWord a5, UWord a6, |
| 639 | UWord a7, UWord a8 ) |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 640 | { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 641 | # if defined(VGP_x86_linux) |
| 642 | UWord val = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 643 | return VG_(mk_SysRes_x86_linux)( val ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 644 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 645 | # elif defined(VGP_amd64_linux) |
| 646 | UWord val = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 647 | return VG_(mk_SysRes_amd64_linux)( val ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 648 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 649 | # elif defined(VGP_ppc32_linux) |
| 650 | ULong ret = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 651 | UInt val = (UInt)(ret>>32); |
| 652 | UInt cr0so = (UInt)(ret); |
| 653 | return VG_(mk_SysRes_ppc32_linux)( val, cr0so ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 654 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 655 | # elif defined(VGP_ppc64_linux) |
| 656 | ULong argblock[7]; |
| 657 | argblock[0] = sysno; |
| 658 | argblock[1] = a1; |
| 659 | argblock[2] = a2; |
| 660 | argblock[3] = a3; |
| 661 | argblock[4] = a4; |
| 662 | argblock[5] = a5; |
| 663 | argblock[6] = a6; |
| 664 | do_syscall_WRK( &argblock[0] ); |
| 665 | return VG_(mk_SysRes_ppc64_linux)( argblock[0], argblock[1] ); |
sewardj | 17edf03 | 2006-10-17 01:53:34 +0000 | [diff] [blame] | 666 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 667 | # elif defined(VGP_arm_linux) |
| 668 | UWord val = do_syscall_WRK(a1,a2,a3,a4,a5,a6,sysno); |
| 669 | return VG_(mk_SysRes_arm_linux)( val ); |
| 670 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 671 | # elif defined(VGP_x86_darwin) |
| 672 | UInt wLO = 0, wHI = 0, err = 0; |
| 673 | ULong u64; |
| 674 | UChar scclass = VG_DARWIN_SYSNO_CLASS(sysno); |
| 675 | switch (scclass) { |
| 676 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 677 | u64 = do_syscall_unix_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 678 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno), &err); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 679 | wLO = (UInt)u64; |
| 680 | wHI = (UInt)(u64 >> 32); |
| 681 | break; |
| 682 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 683 | wLO = do_syscall_mach_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 684 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno)); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 685 | err = 0; |
| 686 | break; |
| 687 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 688 | wLO = do_syscall_mdep_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 689 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno)); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 690 | err = 0; |
| 691 | break; |
| 692 | default: |
| 693 | vg_assert(0); |
| 694 | break; |
| 695 | } |
| 696 | return VG_(mk_SysRes_x86_darwin)( scclass, err ? True : False, wHI, wLO ); |
| 697 | |
| 698 | # elif defined(VGP_amd64_darwin) |
| 699 | ULong wLO = 0, wHI = 0, err = 0; |
| 700 | UChar scclass = VG_DARWIN_SYSNO_CLASS(sysno); |
| 701 | switch (scclass) { |
| 702 | case VG_DARWIN_SYSCALL_CLASS_UNIX: |
| 703 | wLO = do_syscall_unix_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 704 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno), &err, &wHI); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 705 | break; |
| 706 | case VG_DARWIN_SYSCALL_CLASS_MACH: |
| 707 | case VG_DARWIN_SYSCALL_CLASS_MDEP: |
| 708 | wLO = do_syscall_mach_WRK(a1,a2,a3,a4,a5,a6,a7,a8, |
njn | 1a1e95c | 2009-06-03 06:50:06 +0000 | [diff] [blame] | 709 | VG_DARWIN_SYSNO_FOR_KERNEL(sysno)); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 710 | err = 0; |
| 711 | break; |
| 712 | default: |
| 713 | vg_assert(0); |
| 714 | break; |
| 715 | } |
| 716 | return VG_(mk_SysRes_amd64_darwin)( scclass, err ? True : False, wHI, wLO ); |
| 717 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 718 | #elif defined(VGP_s390x_linux) |
| 719 | UWord val; |
| 720 | |
| 721 | if (sysno == __NR_mmap) { |
| 722 | ULong argbuf[6]; |
| 723 | |
| 724 | argbuf[0] = a1; |
| 725 | argbuf[1] = a2; |
| 726 | argbuf[2] = a3; |
| 727 | argbuf[3] = a4; |
| 728 | argbuf[4] = a5; |
| 729 | argbuf[5] = a6; |
| 730 | val = do_syscall_WRK(sysno,(UWord)&argbuf[0],0,0,0,0,0); |
| 731 | } else { |
| 732 | val = do_syscall_WRK(sysno,a1,a2,a3,a4,a5,a6); |
| 733 | } |
| 734 | |
| 735 | return VG_(mk_SysRes_s390x_linux)( val ); |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 736 | |
| 737 | #elif defined(VGP_mips32_linux) |
| 738 | UWord err = 0; |
| 739 | UWord valHi = 0; |
| 740 | UWord valLo = 0; |
| 741 | (void) do_syscall_WRK(a1,a2,a3,a4,a5,a6, sysno,&err,&valHi,&valLo); |
| 742 | return VG_(mk_SysRes_mips32_linux)( valLo, valHi, (ULong)err ); |
cerion | 85665ca | 2005-06-20 15:51:07 +0000 | [diff] [blame] | 743 | #else |
| 744 | # error Unknown platform |
| 745 | #endif |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 746 | } |
| 747 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 748 | /* --------------------------------------------------------------------- |
| 749 | Names of errors. |
| 750 | ------------------------------------------------------------------ */ |
| 751 | |
| 752 | /* Return a string which gives the name of an error value. Note, |
| 753 | unlike the standard C syserror fn, the returned string is not |
| 754 | malloc-allocated or writable -- treat it as a constant. |
| 755 | TODO: implement this properly. */ |
| 756 | |
| 757 | const HChar* VG_(strerror) ( UWord errnum ) |
| 758 | { |
| 759 | switch (errnum) { |
florian | 5945164 | 2011-12-24 21:50:53 +0000 | [diff] [blame] | 760 | case VKI_EPERM: return "Operation not permitted"; |
| 761 | case VKI_ENOENT: return "No such file or directory"; |
| 762 | case VKI_ESRCH: return "No such process"; |
| 763 | case VKI_EINTR: return "Interrupted system call"; |
| 764 | case VKI_EIO: return "Input/output error"; |
| 765 | case VKI_ENXIO: return "No such device or address"; |
| 766 | case VKI_E2BIG: return "Argument list too long"; |
| 767 | case VKI_ENOEXEC: return "Exec format error"; |
| 768 | case VKI_EBADF: return "Bad file descriptor"; |
| 769 | case VKI_ECHILD: return "No child processes"; |
| 770 | case VKI_EAGAIN: return "Resource temporarily unavailable"; |
| 771 | case VKI_ENOMEM: return "Cannot allocate memory"; |
| 772 | case VKI_EACCES: return "Permission denied"; |
| 773 | case VKI_EFAULT: return "Bad address"; |
| 774 | case VKI_ENOTBLK: return "Block device required"; |
| 775 | case VKI_EBUSY: return "Device or resource busy"; |
| 776 | case VKI_EEXIST: return "File exists"; |
| 777 | case VKI_EXDEV: return "Invalid cross-device link"; |
| 778 | case VKI_ENODEV: return "No such device"; |
| 779 | case VKI_ENOTDIR: return "Not a directory"; |
| 780 | case VKI_EISDIR: return "Is a directory"; |
| 781 | case VKI_EINVAL: return "Invalid argument"; |
| 782 | case VKI_ENFILE: return "Too many open files in system"; |
| 783 | case VKI_EMFILE: return "Too many open files"; |
| 784 | case VKI_ENOTTY: return "Inappropriate ioctl for device"; |
| 785 | case VKI_ETXTBSY: return "Text file busy"; |
| 786 | case VKI_EFBIG: return "File too large"; |
| 787 | case VKI_ENOSPC: return "No space left on device"; |
| 788 | case VKI_ESPIPE: return "Illegal seek"; |
| 789 | case VKI_EROFS: return "Read-only file system"; |
| 790 | case VKI_EMLINK: return "Too many links"; |
| 791 | case VKI_EPIPE: return "Broken pipe"; |
| 792 | case VKI_EDOM: return "Numerical argument out of domain"; |
| 793 | case VKI_ERANGE: return "Numerical result out of range"; |
| 794 | |
| 795 | case VKI_ENOSYS: return "Function not implemented"; |
| 796 | case VKI_EOVERFLOW: return "Value too large for defined data type"; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 797 | # if defined(VKI_ERESTARTSYS) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 798 | case VKI_ERESTARTSYS: return "ERESTARTSYS"; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 799 | # endif |
florian | 5945164 | 2011-12-24 21:50:53 +0000 | [diff] [blame] | 800 | default: return "VG_(strerror): unknown error"; |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 801 | } |
| 802 | } |
| 803 | |
| 804 | |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 805 | /*--------------------------------------------------------------------*/ |
florian | 5945164 | 2011-12-24 21:50:53 +0000 | [diff] [blame] | 806 | /*--- end ---*/ |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 807 | /*--------------------------------------------------------------------*/ |