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 #include "wine/pthread.h"
  30
  31 static struct wine_pthread_functions pthread_functions;
  32
  33 /***********************************************************************
  34  *           wine_pthread_get_functions
  35  */
  36 void wine_pthread_get_functions( struct wine_pthread_functions *functions, size_t size )
  37 {
  38     memcpy( functions, &pthread_functions, min( size, sizeof(pthread_functions) ));
  39 }
  40
  41
  42 /***********************************************************************
  43  *           wine_pthread_set_functions
  44  */
  45 void wine_pthread_set_functions( const struct wine_pthread_functions *functions, size_t size )
  46 {
  47     memcpy( &pthread_functions, functions, min( size, sizeof(pthread_functions) ));
  48 }
  49
  50
  51 /***********************************************************************
  52  *           wine_switch_to_stack
  53  *
  54  * Switch to the specified stack and call the function.
  55  */
  56 #if defined(__sparc__) && defined(__GNUC__)
  57 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  58                    "mov %o0, %l0\n\t" /* store first argument */
  59                    "mov %o1, %l1\n\t" /* store second argument */
  60                    "sub %o2, 96, %sp\n\t" /* store stack */
  61                    "call %l0, 0\n\t" /* call func */
  62                    "mov %l1, %o0\n\t" /* delay slot:  arg for func */
  63                    "ta 0x01") /* breakpoint - we never get here */
  64 #elif defined(__powerpc__) && defined(__APPLE__)
  65 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  66                    "mtctr r3\n\t" /* func -> ctr */
  67                    "mr r3,r4\n\t" /* args -> function param 1 (r3) */
  68                    "mr r1,r5\n\t" /* stack */
  69                    "subi r1,r1,0x100\n\t" /* adjust stack pointer */
  70                    "bctrl\n" /* call ctr */
  71                    "1:\tb 1b") /* loop */
  72 #elif defined(__ALPHA__) && defined(__GNUC__)
  73 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  74                    "mov $16,$0\n\t" /* func */
  75                    "mov $17,$16\n\t" /* arg */
  76                    "mov $18,$30\n\t" /* stack */
  77                    "jsr $31,($0),0\n\t" /* call func */
  78                    "L1:\tbr $31,L1") /* loop */
  79 #else
  80 void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
  81 {
  82     wine_call_on_stack( (int (*)(void *))func, arg, stack );
  83     abort();
  84 }
  85 #endif
  86
  87
  88 /***********************************************************************
  89  *           wine_call_on_stack
  90  *
  91  * Switch to the specified stack to call the function and return.
  92  */
  93
  94 #if defined(__i386__) && defined(__GNUC__)
  95 __ASM_GLOBAL_FUNC( wine_call_on_stack,
  96                    "pushl %ebp\n\t"
  97                    "pushl %esi\n\t"
  98                    "movl 12(%esp),%ecx\n\t"  /* func */
  99                    "movl 16(%esp),%edx\n\t"  /* arg */
 100                    "movl 20(%esp),%esi\n\t"  /* stack */
 101                    "andl $~15,%esi\n\t"
 102                    "subl $12,%esi\n\t"
 103                    "xchgl %esi,%esp\n\t"
 104                    "pushl %edx\n\t"
 105                    "xorl %ebp,%ebp\n\t"
 106                    "call *%ecx\n\t"
 107                    "movl %esi,%esp\n\t"
 108                    "popl %esi\n\t"
 109                    "popl %ebp\n\t"
 110                    "ret" )
 111 #elif defined(__i386__) && defined(_MSC_VER)
 112 __declspec(naked) int wine_call_on_stack( int (*func)(void *), void *arg, void *stack )
 113 {
 114   __asm push ebp;
 115   __asm push esi;
 116   __asm mov ecx, 12[esp];
 117   __asm mov edx, 16[esp];
 118   __asm mov esi, 20[esp];
 119   __asm xchg esp, esi;
 120   __asm push edx;
 121   __asm xor ebp, ebp;
 122   __asm call [ecx];
 123   __asm mov esp, esi;
 124   __asm pop esi;
 125   __asm pop ebp
 126   __asm ret;
 127 }
 128 #elif defined(__x86_64__) && defined(__GNUC__)
 129 __ASM_GLOBAL_FUNC( wine_call_on_stack,
 130                    "pushq %rbp\n\t"
 131                    ".cfi_adjust_cfa_offset 8\n\t"
 132                    ".cfi_rel_offset %rbp,0\n\t"
 133                    "movq %rsp,%rbp\n\t"
 134                    ".cfi_def_cfa_register %rbp\n\t"
 135                    "movq %rdi,%rax\n\t" /* func */
 136                    "movq %rsi,%rdi\n\t" /* arg */
 137                    "andq $~15,%rdx\n\t" /* stack */
 138                    "movq %rdx,%rsp\n\t"
 139                    "callq *%rax\n\t"    /* call func */
 140                    "movq %rbp,%rsp\n\t"
 141                    ".cfi_def_cfa_register %rsp\n\t"
 142                    "popq %rbp\n\t"
 143                    ".cfi_adjust_cfa_offset -8\n\t"
 144                    ".cfi_same_value %rbp\n\t"
 145                    "ret")
 146 #elif defined(__powerpc__) && defined(__GNUC__)
 147 __ASM_GLOBAL_FUNC( wine_call_on_stack,
 148                    "mflr 0\n\t"         /* get return address */
 149                    "stw 0, 4(1)\n\t"    /* save return address */
 150                    "subi 5, 5, 16\n\t" /* reserve space on new stack */
 151                    "stw 1, 12(5)\n\t"   /* store old sp */
 152                    "mtctr 3\n\t"        /* func -> ctr */
 153                    "mr 3,4\n\t"         /* args -> function param 1 (r3) */
 154                    "mr 1,5\n\t"         /* stack */
 155                    "li 0, 0\n\t"        /* zero */
 156                    "stw 0, 0(1)\n\t"    /* bottom of stack */
 157                    "stwu 1, -16(1)\n\t" /* create a frame for this function */
 158                    "bctrl\n\t"          /* call ctr */
 159                    "lwz 1, 28(1)\n\t"   /* fetch old sp */
 160                    "lwz 0, 4(1)\n\t"    /* fetch return address */
 161                    "mtlr 0\n\t"         /* return address -> lr */
 162                    "blr")               /* return */
 163 #else
 164 #error You must implement wine_switch_to_stack for your platform
 165 #endif