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/asm.h"
  23
  24 #ifdef __ASM_OBSOLETE
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <sys/types.h>
  29 #include <stdarg.h>
  30 #include <windef.h>
  31
  32 /* no longer used, for backwards compatibility only */
  33 struct wine_pthread_functions;
  34 static void *pthread_functions[8];
  35
  36 /***********************************************************************
  37  *           wine_pthread_get_functions
  38  */
  39 void wine_pthread_get_functions_obsolete( struct wine_pthread_functions *functions, size_t size )
  40 {
  41     memcpy( functions, &pthread_functions, min( size, sizeof(pthread_functions) ));
  42 }
  43
  44
  45 /***********************************************************************
  46  *           wine_pthread_set_functions
  47  */
  48 void wine_pthread_set_functions_obsolete( const struct wine_pthread_functions *functions, size_t size )
  49 {
  50     memcpy( &pthread_functions, functions, min( size, sizeof(pthread_functions) ));
  51 }
  52
  53
  54 /***********************************************************************
  55  *           wine_call_on_stack
  56  *
  57  * Switch to the specified stack to call the function and return.
  58  */
  59
  60 extern int wine_call_on_stack_obsolete( int (*func)(void *), void *arg, void *stack );
  61 #if defined(__i386__) && defined(__GNUC__)
  62 __ASM_GLOBAL_FUNC( wine_call_on_stack_obsolete,
  63                    "pushl %ebp\n\t"
  64                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  65                    __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
  66                    "pushl %esi\n\t"
  67                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  68                    __ASM_CFI(".cfi_rel_offset %esi,0\n\t")
  69                    "movl %esp,%esi\n\t"
  70                    __ASM_CFI(".cfi_def_cfa_register %esi\n\t")
  71                    "movl 12(%esp),%ecx\n\t"  /* func */
  72                    "movl 16(%esp),%edx\n\t"  /* arg */
  73                    "movl 20(%esp),%eax\n\t"  /* stack */
  74                    "andl $~15,%eax\n\t"
  75                    "subl $12,%eax\n\t"
  76                    "movl %eax,%esp\n\t"
  77                    "pushl %edx\n\t"
  78                    "xorl %ebp,%ebp\n\t"
  79                    "call *%ecx\n\t"
  80                    "movl %esi,%esp\n\t"
  81                    "popl %esi\n\t"
  82                    __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
  83                    __ASM_CFI(".cfi_same_value %esi\n\t")
  84                    "popl %ebp\n\t"
  85                    __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
  86                    __ASM_CFI(".cfi_same_value %ebp\n\t")
  87                    "ret" )
  88 #elif defined(__x86_64__) && defined(__GNUC__)
  89 __ASM_GLOBAL_FUNC( wine_call_on_stack_obsolete,
  90                    "pushq %rbp\n\t"
  91                    __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
  92                    __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
  93                    "movq %rsp,%rbp\n\t"
  94                    __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
  95                    "movq %rdi,%rax\n\t" /* func */
  96                    "movq %rsi,%rdi\n\t" /* arg */
  97                    "andq $~15,%rdx\n\t" /* stack */
  98                    "movq %rdx,%rsp\n\t"
  99                    "callq *%rax\n\t"    /* call func */
 100                    "movq %rbp,%rsp\n\t"
 101                    __ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
 102                    "popq %rbp\n\t"
 103                    __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
 104                    __ASM_CFI(".cfi_same_value %rbp\n\t")
 105                    "ret")
 106 #endif
 107
 108 /***********************************************************************
 109  *           wine_switch_to_stack
 110  *
 111  * Switch to the specified stack and call the function.
 112  */
 113 void DECLSPEC_NORETURN wine_switch_to_stack_obsolete( void (*func)(void *), void *arg, void *stack )
 114 {
 115     wine_call_on_stack_obsolete( (int (*)(void *))func, arg, stack );
 116     abort();
 117 }
 118
 119 __ASM_OBSOLETE(wine_pthread_get_functions);
 120 __ASM_OBSOLETE(wine_pthread_set_functions);
 121 __ASM_OBSOLETE(wine_call_on_stack);
 122 __ASM_OBSOLETE(wine_switch_to_stack);
 123
 124 #endif  /* __ASM_OBSOLETE */