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 #include "wine/asm.h"
  24
  25 #ifdef __ASM_OBSOLETE
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/types.h>
  30 #include <stdarg.h>
  31 #include <windef.h>
  32
  33 /* no longer used, for backwards compatibility only */
  34 struct wine_pthread_functions;
  35 static void *pthread_functions[8];
  36
  37 /***********************************************************************
  38  *           wine_pthread_get_functions
  39  */
  40 void wine_pthread_get_functions_obsolete( struct wine_pthread_functions *functions, size_t size )
  41 {
  42     memcpy( functions, &pthread_functions, min( size, sizeof(pthread_functions) ));
  43 }
  44
  45
  46 /***********************************************************************
  47  *           wine_pthread_set_functions
  48  */
  49 void wine_pthread_set_functions_obsolete( const struct wine_pthread_functions *functions, size_t size )
  50 {
  51     memcpy( &pthread_functions, functions, min( size, sizeof(pthread_functions) ));
  52 }
  53
  54
  55 /***********************************************************************
  56  *           wine_call_on_stack
  57  *
  58  * Switch to the specified stack to call the function and return.
  59  */
  60
  61 extern int wine_call_on_stack_obsolete( int (*func)(void *), void *arg, void *stack );
  62 #if defined(__i386__) && defined(__GNUC__)
  63 __ASM_GLOBAL_FUNC( wine_call_on_stack_obsolete,
  64                    "pushl %ebp\n\t"
  65                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  66                    __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
  67                    "pushl %esi\n\t"
  68                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  69                    __ASM_CFI(".cfi_rel_offset %esi,0\n\t")
  70                    "movl %esp,%esi\n\t"
  71                    __ASM_CFI(".cfi_def_cfa_register %esi\n\t")
  72                    "movl 12(%esp),%ecx\n\t"  /* func */
  73                    "movl 16(%esp),%edx\n\t"  /* arg */
  74                    "movl 20(%esp),%eax\n\t"  /* stack */
  75                    "andl $~15,%eax\n\t"
  76                    "subl $12,%eax\n\t"
  77                    "movl %eax,%esp\n\t"
  78                    "pushl %edx\n\t"
  79                    "xorl %ebp,%ebp\n\t"
  80                    "call *%ecx\n\t"
  81                    "movl %esi,%esp\n\t"
  82                    "popl %esi\n\t"
  83                    __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
  84                    __ASM_CFI(".cfi_same_value %esi\n\t")
  85                    "popl %ebp\n\t"
  86                    __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
  87                    __ASM_CFI(".cfi_same_value %ebp\n\t")
  88                    "ret" )
  89 #elif defined(__x86_64__) && defined(__GNUC__)
  90 __ASM_GLOBAL_FUNC( wine_call_on_stack_obsolete,
  91                    "pushq %rbp\n\t"
  92                    __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
  93                    __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
  94                    "movq %rsp,%rbp\n\t"
  95                    __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
  96                    "movq %rdi,%rax\n\t" /* func */
  97                    "movq %rsi,%rdi\n\t" /* arg */
  98                    "andq $~15,%rdx\n\t" /* stack */
  99                    "movq %rdx,%rsp\n\t"
 100                    "callq *%rax\n\t"    /* call func */
 101                    "movq %rbp,%rsp\n\t"
 102                    __ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
 103                    "popq %rbp\n\t"
 104                    __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
 105                    __ASM_CFI(".cfi_same_value %rbp\n\t")
 106                    "ret")
 107 #elif defined(__arm__) && defined(__GNUC__)
 108 __ASM_GLOBAL_FUNC( wine_call_on_stack_obsolete,
 109                    "push {r4,LR}\n\t"   /* save return address on stack */
 110                    "mov r4, sp\n\t"     /* store old sp in local var */
 111                    "mov sp, r2\n\t"     /* stack */
 112                    "mov r2, r0\n\t"     /* func -> scratch register */
 113                    "mov r0, r1\n\t"     /* arg */
 114                    "blx r2\n\t"         /* call func */
 115                    "mov sp, r4\n\t"     /* restore old sp from local var */
 116                    "pop {r4,PC}")       /* fetch return address into pc */
 117 #elif defined(__aarch64__) && defined(__GNUC__)
 118 __ASM_GLOBAL_FUNC( wine_call_on_stack_obsolete,
 119                    "stp x29, x30, [sp,#-32]!\n\t"    /* save return address on stack */
 120                    "str x19, [sp,#16]\n\t"           /* save register on stack */
 121                    "mov x19, sp\n\t"                 /* store old sp in local var */
 122                    "mov sp, x2\n\t"                  /* stack */
 123                    "mov x2, x0\n\t"                  /* func -> scratch register */
 124                    "mov x0, x1\n\t"                  /* arg */
 125                    "blr x2\n\t"                      /* call func */
 126                    "mov sp, x19\n\t"                 /* restore old sp from local var */
 127                    "ldr x19, [sp,#16]\n\t"           /* restore register from stack */
 128                    "ldp x29, x30, [sp],#32\n\t"      /* restore return address */
 129                    "ret")                            /* return */
 130 #endif
 131
 132 /***********************************************************************
 133  *           wine_switch_to_stack
 134  *
 135  * Switch to the specified stack and call the function.
 136  */
 137 void DECLSPEC_NORETURN wine_switch_to_stack_obsolete( void (*func)(void *), void *arg, void *stack )
 138 {
 139     wine_call_on_stack_obsolete( (int (*)(void *))func, arg, stack );
 140     abort();
 141 }
 142
 143 __ASM_OBSOLETE(wine_pthread_get_functions);
 144 __ASM_OBSOLETE(wine_pthread_set_functions);
 145 __ASM_OBSOLETE(wine_call_on_stack);
 146 __ASM_OBSOLETE(wine_switch_to_stack);
 147
 148 #endif  /* __ASM_OBSOLETE */