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 void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack );
  57 #if defined(__i386__) && defined(__GNUC__)
  58 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  59                    "movl 4(%esp),%ecx\n\t"  /* func */
  60                    "movl 8(%esp),%edx\n\t"  /* arg */
  61                    "movl 12(%esp),%esp\n\t"  /* stack */
  62                    "andl $~15,%esp\n\t"
  63                    "subl $12,%esp\n\t"
  64                    "pushl %edx\n\t"
  65                    "xorl %ebp,%ebp\n\t"
  66                    "call *%ecx\n\t"
  67                    "int $3" /* we never return here */ );
  68 #elif defined(__i386__) && defined(_MSC_VER)
  69 __declspec(naked) void wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
  70 {
  71   __asm mov ecx, 4[esp];
  72   __asm mov edx, 8[esp];
  73   __asm mov esp, 12[esp];
  74   __asm push edx;
  75   __asm xor ebp, ebp;
  76   __asm call [ecx];
  77   __asm int 3;
  78 }
  79 #elif defined(__sparc__) && defined(__GNUC__)
  80 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  81                    "mov %o0, %l0\n\t" /* store first argument */
  82                    "mov %o1, %l1\n\t" /* store second argument */
  83                    "sub %o2, 96, %sp\n\t" /* store stack */
  84                    "call %l0, 0\n\t" /* call func */
  85                    "mov %l1, %o0\n\t" /* delay slot:  arg for func */
  86                    "ta 0x01"); /* breakpoint - we never get here */
  87 #elif defined(__powerpc__) && defined(__APPLE__)
  88 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  89                    "mtctr r3\n\t" /* func -> ctr */
  90                    "mr r3,r4\n\t" /* args -> function param 1 (r3) */
  91                    "mr r1,r5\n\t" /* stack */
  92                    "subi r1,r1,0x100\n\t" /* adjust stack pointer */
  93                    "bctr\n" /* call ctr */
  94                    "1:\tb 1b"); /* loop */
  95 #elif defined(__powerpc__) && defined(__GNUC__)
  96 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
  97                    "mtctr 3\n\t" /* func -> ctr */
  98                    "mr 3,4\n\t" /* args -> function param 1 (r3) */
  99                    "mr 1,5\n\t" /* stack */
 100                    "bctr\n\t" /* call ctr */
 101                    "1:\tb 1b"); /* loop */
 102 #elif defined(__ALPHA__) && defined(__GNUC__)
 103 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
 104                    "mov $16,$0\n\t" /* func */
 105                    "mov $17,$16\n\t" /* arg */
 106                    "mov $18,$30\n\t" /* stack */
 107                    "jsr $31,($0),0\n\t" /* call func */
 108                    "L1:\tbr $31,L1"); /* loop */
 109 #elif defined(__x86_64__) && defined(__GNUC__)
 110 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
 111                    "movq %rdi,%rax\n\t" /* func */
 112                    "movq %rsi,%rdi\n\t" /* arg */
 113                    "andq $~15,%rdx\n\t" /* stack */
 114                    "movq %rdx,%rsp\n\t"
 115                    "xorq %rbp,%rbp\n\t"
 116                    "callq *%rax\n\t"    /* call func */
 117                    "int $3");
 118 #else
 119 #error You must implement wine_switch_to_stack for your platform
 120 #endif