libs/wine/port.c

   1 /*
   2  * Wine portability routines
   3  *
   4  * Copyright 2000 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 "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/types.h>
  27
  28 #include "wine/library.h"
  29
  30 /* no longer used, for backwards compatibility only */
  31 struct wine_pthread_functions;
  32 static void *pthread_functions[8];
  33
  34 /***********************************************************************
  35  *           wine_pthread_get_functions
  36  */
  37 void wine_pthread_get_functions( struct wine_pthread_functions *functions, size_t size )
  38 {
  39     memcpy( functions, &pthread_functions, min( size, sizeof(pthread_functions) ));
  40 }
  41
  42
  43 /***********************************************************************
  44  *           wine_pthread_set_functions
  45  */
  46 void wine_pthread_set_functions( const struct wine_pthread_functions *functions, size_t size )
  47 {
  48     memcpy( &pthread_functions, functions, min( size, sizeof(pthread_functions) ));
  49 }
  50
  51
  52 /***********************************************************************
  53  *           wine_switch_to_stack
  54  *
  55  * Switch to the specified stack and call the function.
  56  */
  57 #if defined(__sparc__) && defined(__GNUC__)
  58 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  59                    "mov %o0, %l0\n\t" /* store first argument */
  60                    "mov %o1, %l1\n\t" /* store second argument */
  61                    "sub %o2, 96, %sp\n\t" /* store stack */
  62                    "call %l0, 0\n\t" /* call func */
  63                    "mov %l1, %o0\n\t" /* delay slot:  arg for func */
  64                    "ta 0x01") /* breakpoint - we never get here */
  65 #elif defined(__powerpc__) && defined(__APPLE__)
  66 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  67                    "mtctr r3\n\t" /* func -> ctr */
  68                    "mr r3,r4\n\t" /* args -> function param 1 (r3) */
  69                    "mr r1,r5\n\t" /* stack */
  70                    "subi r1,r1,0x100\n\t" /* adjust stack pointer */
  71                    "bctrl\n" /* call ctr */
  72                    "1:\tb 1b") /* loop */
  73 #elif defined(__ALPHA__) && defined(__GNUC__)
  74 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  75                    "mov $16,$0\n\t" /* func */
  76                    "mov $17,$16\n\t" /* arg */
  77                    "mov $18,$30\n\t" /* stack */
  78                    "jsr $31,($0),0\n\t" /* call func */
  79                    "L1:\tbr $31,L1") /* loop */
  80 #else
  81 void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
  82 {
  83     wine_call_on_stack( (int (*)(void *))func, arg, stack );
  84     abort();
  85 }
  86 #endif
  87
  88
  89 /***********************************************************************
  90  *           wine_call_on_stack
  91  *
  92  * Switch to the specified stack to call the function and return.
  93  */
  94
  95 #if defined(__i386__) && defined(__GNUC__)
  96 __ASM_GLOBAL_FUNC( wine_call_on_stack,
  97                    "pushl %ebp\n\t"
  98                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  99                    __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
 100                    "pushl %esi\n\t"
 101                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 102                    __ASM_CFI(".cfi_rel_offset %esi,0\n\t")
 103                    "movl %esp,%esi\n\t"
 104                    __ASM_CFI(".cfi_def_cfa_register %esi\n\t")
 105                    "movl 12(%esp),%ecx\n\t"  /* func */
 106                    "movl 16(%esp),%edx\n\t"  /* arg */
 107                    "movl 20(%esp),%eax\n\t"  /* stack */
 108                    "andl $~15,%eax\n\t"
 109                    "subl $12,%eax\n\t"
 110                    "movl %eax,%esp\n\t"
 111                    "pushl %edx\n\t"
 112                    "xorl %ebp,%ebp\n\t"
 113                    "call *%ecx\n\t"
 114                    "movl %esi,%esp\n\t"
 115                    "popl %esi\n\t"
 116                    __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
 117                    __ASM_CFI(".cfi_same_value %esi\n\t")
 118                    "popl %ebp\n\t"
 119                    __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
 120                    __ASM_CFI(".cfi_same_value %ebp\n\t")
 121                    "ret" )
 122 #elif defined(__i386__) && defined(_MSC_VER)
 123 __declspec(naked) int wine_call_on_stack( int (*func)(void *), void *arg, void *stack )
 124 {
 125   __asm push ebp;
 126   __asm push esi;
 127   __asm mov ecx, 12[esp];
 128   __asm mov edx, 16[esp];
 129   __asm mov esi, 20[esp];
 130   __asm xchg esp, esi;
 131   __asm push edx;
 132   __asm xor ebp, ebp;
 133   __asm call [ecx];
 134   __asm mov esp, esi;
 135   __asm pop esi;
 136   __asm pop ebp
 137   __asm ret;
 138 }
 139 #elif defined(__x86_64__) && defined(__GNUC__)
 140 __ASM_GLOBAL_FUNC( wine_call_on_stack,
 141                    "pushq %rbp\n\t"
 142                    ".cfi_adjust_cfa_offset 8\n\t"
 143                    ".cfi_rel_offset %rbp,0\n\t"
 144                    "movq %rsp,%rbp\n\t"
 145                    ".cfi_def_cfa_register %rbp\n\t"
 146                    "movq %rdi,%rax\n\t" /* func */
 147                    "movq %rsi,%rdi\n\t" /* arg */
 148                    "andq $~15,%rdx\n\t" /* stack */
 149                    "movq %rdx,%rsp\n\t"
 150                    "callq *%rax\n\t"    /* call func */
 151                    "movq %rbp,%rsp\n\t"
 152                    ".cfi_def_cfa_register %rsp\n\t"
 153                    "popq %rbp\n\t"
 154                    ".cfi_adjust_cfa_offset -8\n\t"
 155                    ".cfi_same_value %rbp\n\t"
 156                    "ret")
 157 #elif defined(__powerpc__) && defined(__GNUC__)
 158 __ASM_GLOBAL_FUNC( wine_call_on_stack,
 159                    "mflr 0\n\t"         /* get return address */
 160                    "stw 0, 4(1)\n\t"    /* save return address */
 161                    "subi 5, 5, 16\n\t" /* reserve space on new stack */
 162                    "stw 1, 12(5)\n\t"   /* store old sp */
 163                    "mtctr 3\n\t"        /* func -> ctr */
 164                    "mr 3,4\n\t"         /* args -> function param 1 (r3) */
 165                    "mr 1,5\n\t"         /* stack */
 166                    "li 0, 0\n\t"        /* zero */
 167                    "stw 0, 0(1)\n\t"    /* bottom of stack */
 168                    "stwu 1, -16(1)\n\t" /* create a frame for this function */
 169                    "bctrl\n\t"          /* call ctr */
 170                    "lwz 1, 28(1)\n\t"   /* fetch old sp */
 171                    "lwz 0, 4(1)\n\t"    /* fetch return address */
 172                    "mtlr 0\n\t"         /* return address -> lr */
 173                    "blr")               /* return */
 174 #else
 175 #error You must implement wine_switch_to_stack for your platform
 176 #endif