dlls/winecrt0/setjmp.c

   1 /*
   2  * setjmpex/longjmp functions for Wine exception handling
   3  *
   4  * Copyright (c) 1999, 2010 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include "winternl.h"
  23 #include "wine/exception.h"
  24 #include "wine/asm.h"
  25
  26 #if defined(__GNUC__) || defined(__clang__)
  27
  28 #if defined(__i386__)
  29
  30 __ASM_GLOBAL_FUNC( __wine_setjmpex,
  31                    "movl 4(%esp),%ecx\n\t"   /* jmp_buf */
  32                    "movl %ebp,0(%ecx)\n\t"   /* jmp_buf.Ebp */
  33                    "movl %ebx,4(%ecx)\n\t"   /* jmp_buf.Ebx */
  34                    "movl %edi,8(%ecx)\n\t"   /* jmp_buf.Edi */
  35                    "movl %esi,12(%ecx)\n\t"  /* jmp_buf.Esi */
  36                    "movl %esp,16(%ecx)\n\t"  /* jmp_buf.Esp */
  37                    "movl 0(%esp),%eax\n\t"
  38                    "movl %eax,20(%ecx)\n\t"  /* jmp_buf.Eip */
  39                    "xorl %eax,%eax\n\t"
  40                    "ret" )
  41
  42 __ASM_GLOBAL_FUNC( __wine_longjmp,
  43                    "movl 4(%esp),%ecx\n\t"   /* jmp_buf */
  44                    "movl 8(%esp),%eax\n\t"   /* retval */
  45                    "movl 0(%ecx),%ebp\n\t"   /* jmp_buf.Ebp */
  46                    "movl 4(%ecx),%ebx\n\t"   /* jmp_buf.Ebx */
  47                    "movl 8(%ecx),%edi\n\t"   /* jmp_buf.Edi */
  48                    "movl 12(%ecx),%esi\n\t"  /* jmp_buf.Esi */
  49                    "movl 16(%ecx),%esp\n\t"  /* jmp_buf.Esp */
  50                    "addl $4,%esp\n\t"        /* get rid of return address */
  51                    "jmp *20(%ecx)\n\t"       /* jmp_buf.Eip */ )
  52
  53 #elif defined(__x86_64__)
  54
  55 __ASM_GLOBAL_FUNC( __wine_setjmpex,
  56                    "movq %rdx,(%rcx)\n\t"          /* jmp_buf->Frame */
  57                    "movq %rbx,0x8(%rcx)\n\t"       /* jmp_buf->Rbx */
  58                    "leaq 0x8(%rsp),%rax\n\t"
  59                    "movq %rax,0x10(%rcx)\n\t"      /* jmp_buf->Rsp */
  60                    "movq %rbp,0x18(%rcx)\n\t"      /* jmp_buf->Rbp */
  61                    "movq %rsi,0x20(%rcx)\n\t"      /* jmp_buf->Rsi */
  62                    "movq %rdi,0x28(%rcx)\n\t"      /* jmp_buf->Rdi */
  63                    "movq %r12,0x30(%rcx)\n\t"      /* jmp_buf->R12 */
  64                    "movq %r13,0x38(%rcx)\n\t"      /* jmp_buf->R13 */
  65                    "movq %r14,0x40(%rcx)\n\t"      /* jmp_buf->R14 */
  66                    "movq %r15,0x48(%rcx)\n\t"      /* jmp_buf->R15 */
  67                    "movq (%rsp),%rax\n\t"
  68                    "movq %rax,0x50(%rcx)\n\t"      /* jmp_buf->Rip */
  69                    "stmxcsr 0x58(%rcx)\n\t"        /* jmp_buf->MxCsr */
  70                    "fnstcw 0x5c(%rcx)\n\t"         /* jmp_buf->FpCsr */
  71                    "movdqa %xmm6,0x60(%rcx)\n\t"   /* jmp_buf->Xmm6 */
  72                    "movdqa %xmm7,0x70(%rcx)\n\t"   /* jmp_buf->Xmm7 */
  73                    "movdqa %xmm8,0x80(%rcx)\n\t"   /* jmp_buf->Xmm8 */
  74                    "movdqa %xmm9,0x90(%rcx)\n\t"   /* jmp_buf->Xmm9 */
  75                    "movdqa %xmm10,0xa0(%rcx)\n\t"  /* jmp_buf->Xmm10 */
  76                    "movdqa %xmm11,0xb0(%rcx)\n\t"  /* jmp_buf->Xmm11 */
  77                    "movdqa %xmm12,0xc0(%rcx)\n\t"  /* jmp_buf->Xmm12 */
  78                    "movdqa %xmm13,0xd0(%rcx)\n\t"  /* jmp_buf->Xmm13 */
  79                    "movdqa %xmm14,0xe0(%rcx)\n\t"  /* jmp_buf->Xmm14 */
  80                    "movdqa %xmm15,0xf0(%rcx)\n\t"  /* jmp_buf->Xmm15 */
  81                    "xorq %rax,%rax\n\t"
  82                    "retq" )
  83
  84 __ASM_GLOBAL_FUNC( __wine_longjmp,
  85                    "movq %rdx,%rax\n\t"            /* retval */
  86                    "movq 0x8(%rcx),%rbx\n\t"       /* jmp_buf->Rbx */
  87                    "movq 0x18(%rcx),%rbp\n\t"      /* jmp_buf->Rbp */
  88                    "movq 0x20(%rcx),%rsi\n\t"      /* jmp_buf->Rsi */
  89                    "movq 0x28(%rcx),%rdi\n\t"      /* jmp_buf->Rdi */
  90                    "movq 0x30(%rcx),%r12\n\t"      /* jmp_buf->R12 */
  91                    "movq 0x38(%rcx),%r13\n\t"      /* jmp_buf->R13 */
  92                    "movq 0x40(%rcx),%r14\n\t"      /* jmp_buf->R14 */
  93                    "movq 0x48(%rcx),%r15\n\t"      /* jmp_buf->R15 */
  94                    "ldmxcsr 0x58(%rcx)\n\t"        /* jmp_buf->MxCsr */
  95                    "fnclex\n\t"
  96                    "fldcw 0x5c(%rcx)\n\t"          /* jmp_buf->FpCsr */
  97                    "movdqa 0x60(%rcx),%xmm6\n\t"   /* jmp_buf->Xmm6 */
  98                    "movdqa 0x70(%rcx),%xmm7\n\t"   /* jmp_buf->Xmm7 */
  99                    "movdqa 0x80(%rcx),%xmm8\n\t"   /* jmp_buf->Xmm8 */
 100                    "movdqa 0x90(%rcx),%xmm9\n\t"   /* jmp_buf->Xmm9 */
 101                    "movdqa 0xa0(%rcx),%xmm10\n\t"  /* jmp_buf->Xmm10 */
 102                    "movdqa 0xb0(%rcx),%xmm11\n\t"  /* jmp_buf->Xmm11 */
 103                    "movdqa 0xc0(%rcx),%xmm12\n\t"  /* jmp_buf->Xmm12 */
 104                    "movdqa 0xd0(%rcx),%xmm13\n\t"  /* jmp_buf->Xmm13 */
 105                    "movdqa 0xe0(%rcx),%xmm14\n\t"  /* jmp_buf->Xmm14 */
 106                    "movdqa 0xf0(%rcx),%xmm15\n\t"  /* jmp_buf->Xmm15 */
 107                    "movq 0x50(%rcx),%rdx\n\t"      /* jmp_buf->Rip */
 108                    "movq 0x10(%rcx),%rsp\n\t"      /* jmp_buf->Rsp */
 109                    "jmp *%rdx" )
 110
 111 #elif defined(__arm__)
 112
 113 __ASM_GLOBAL_FUNC( __wine_setjmpex,
 114                    "stm r0, {r1,r4-r11}\n"         /* jmp_buf->Frame,R4..R11 */
 115                    "str sp, [r0, #0x24]\n\t"       /* jmp_buf->Sp */
 116                    "str lr, [r0, #0x28]\n\t"       /* jmp_buf->Pc */
 117 #ifndef __SOFTFP__
 118                    "vmrs r2, fpscr\n\t"
 119                    "str r2, [r0, #0x2c]\n\t"       /* jmp_buf->Fpscr */
 120                    "add r0, r0, #0x30\n\t"
 121                    "vstm r0, {d8-d15}\n\t"         /* jmp_buf->D[0..7] */
 122 #endif
 123                    "mov r0, #0\n\t"
 124                    "bx lr" )
 125
 126 __ASM_GLOBAL_FUNC( __wine_longjmp,
 127                    "ldm r0, {r3-r11}\n\t"          /* jmp_buf->Frame,R4..R11 */
 128                    "ldr sp, [r0, #0x24]\n\t"       /* jmp_buf->Sp */
 129                    "ldr r2, [r0, #0x28]\n\t"       /* jmp_buf->Pc */
 130 #ifndef __SOFTFP__
 131                    "ldr r3, [r0, #0x2c]\n\t"       /* jmp_buf->Fpscr */
 132                    "vmsr fpscr, r3\n\t"
 133                    "add r0, r0, #0x30\n\t"
 134                    "vldm r0, {d8-d15}\n\t"         /* jmp_buf->D[0..7] */
 135 #endif
 136                    "mov r0, r1\n\t"                /* retval */
 137                    "bx r2" )
 138
 139 #elif defined(__aarch64__)
 140
 141 __ASM_GLOBAL_FUNC( __wine_setjmpex,
 142                    "str x1,       [x0]\n\t"        /* jmp_buf->Frame */
 143                    "stp x19, x20, [x0, #0x10]\n\t" /* jmp_buf->X19, X20 */
 144                    "stp x21, x22, [x0, #0x20]\n\t" /* jmp_buf->X21, X22 */
 145                    "stp x23, x24, [x0, #0x30]\n\t" /* jmp_buf->X23, X24 */
 146                    "stp x25, x26, [x0, #0x40]\n\t" /* jmp_buf->X25, X26 */
 147                    "stp x27, x28, [x0, #0x50]\n\t" /* jmp_buf->X27, X28 */
 148                    "stp x29, x30, [x0, #0x60]\n\t" /* jmp_buf->Fp,  Lr  */
 149                    "mov x2,  sp\n\t"
 150                    "str x2,       [x0, #0x70]\n\t" /* jmp_buf->Sp */
 151                    "mrs x2,  fpcr\n\t"
 152                    "str w2,       [x0, #0x78]\n\t" /* jmp_buf->Fpcr */
 153                    "mrs x2,  fpsr\n\t"
 154                    "str w2,       [x0, #0x7c]\n\t" /* jmp_buf->Fpsr */
 155                    "stp d8,  d9,  [x0, #0x80]\n\t" /* jmp_buf->D[0-1] */
 156                    "stp d10, d11, [x0, #0x90]\n\t" /* jmp_buf->D[2-3] */
 157                    "stp d12, d13, [x0, #0xa0]\n\t" /* jmp_buf->D[4-5] */
 158                    "stp d14, d15, [x0, #0xb0]\n\t" /* jmp_buf->D[6-7] */
 159                    "mov x0, #0\n\t"
 160                    "ret" )
 161
 162 __ASM_GLOBAL_FUNC( __wine_longjmp,
 163                    "ldp x19, x20, [x0, #0x10]\n\t" /* jmp_buf->X19, X20 */
 164                    "ldp x21, x22, [x0, #0x20]\n\t" /* jmp_buf->X21, X22 */
 165                    "ldp x23, x24, [x0, #0x30]\n\t" /* jmp_buf->X23, X24 */
 166                    "ldp x25, x26, [x0, #0x40]\n\t" /* jmp_buf->X25, X26 */
 167                    "ldp x27, x28, [x0, #0x50]\n\t" /* jmp_buf->X27, X28 */
 168                    "ldp x29, x30, [x0, #0x60]\n\t" /* jmp_buf->Fp,  Lr  */
 169                    "ldr x2,       [x0, #0x70]\n\t" /* jmp_buf->Sp */
 170                    "mov sp,  x2\n\t"
 171                    "ldr w2,       [x0, #0x78]\n\t" /* jmp_buf->Fpcr */
 172                    "msr fpcr, x2\n\t"
 173                    "ldr w2,       [x0, #0x7c]\n\t" /* jmp_buf->Fpsr */
 174                    "msr fpsr, x2\n\t"
 175                    "ldp d8,  d9,  [x0, #0x80]\n\t" /* jmp_buf->D[0-1] */
 176                    "ldp d10, d11, [x0, #0x90]\n\t" /* jmp_buf->D[2-3] */
 177                    "ldp d12, d13, [x0, #0xa0]\n\t" /* jmp_buf->D[4-5] */
 178                    "ldp d14, d15, [x0, #0xb0]\n\t" /* jmp_buf->D[6-7] */
 179                    "mov x0, x1\n\t"                /* retval */
 180                    "ret" )
 181
 182 #else
 183
 184 int __cdecl __wine_setjmpex( __wine_jmp_buf *buf, EXCEPTION_REGISTRATION_RECORD *frame )
 185 {
 186     return setjmp( buf );
 187 }
 188
 189 void __cdecl __wine_longjmp( __wine_jmp_buf *buf, int retval )
 190 {
 191     for (;;) longjmp( buf, retval );
 192 }
 193
 194 #endif
 195
 196 #endif /* __GNUC__ || __clang__ */