Sweden-Number/libs/wine/port.c

194 lines
7.7 KiB
C

/*
* Wine portability routines
*
* Copyright 2000 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "wine/unicode.h"
#include "wine/library.h"
/* functions from libwine_port that are also exported from libwine for backwards compatibility,
* on platforms that require it */
#ifndef __ANDROID__
const void *libwine_port_functions[] =
{
wine_compare_string,
wine_cp_enum_table,
wine_cp_get_table,
wine_cp_mbstowcs,
wine_cp_wcstombs,
wine_cpsymbol_mbstowcs,
wine_cpsymbol_wcstombs,
wine_fold_string,
wine_utf8_mbstowcs,
wine_utf8_wcstombs
};
#endif
/* no longer used, for backwards compatibility only */
struct wine_pthread_functions;
static void *pthread_functions[8];
/***********************************************************************
* wine_pthread_get_functions
*/
void wine_pthread_get_functions( struct wine_pthread_functions *functions, size_t size )
{
memcpy( functions, &pthread_functions, min( size, sizeof(pthread_functions) ));
}
/***********************************************************************
* wine_pthread_set_functions
*/
void wine_pthread_set_functions( const struct wine_pthread_functions *functions, size_t size )
{
memcpy( &pthread_functions, functions, min( size, sizeof(pthread_functions) ));
}
/***********************************************************************
* wine_switch_to_stack
*
* Switch to the specified stack and call the function.
*/
void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
{
wine_call_on_stack( (int (*)(void *))func, arg, stack );
abort();
}
/***********************************************************************
* wine_call_on_stack
*
* Switch to the specified stack to call the function and return.
*/
#if defined(__i386__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_call_on_stack,
"pushl %ebp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
"pushl %esi\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %esi,0\n\t")
"movl %esp,%esi\n\t"
__ASM_CFI(".cfi_def_cfa_register %esi\n\t")
"movl 12(%esp),%ecx\n\t" /* func */
"movl 16(%esp),%edx\n\t" /* arg */
"movl 20(%esp),%eax\n\t" /* stack */
"andl $~15,%eax\n\t"
"subl $12,%eax\n\t"
"movl %eax,%esp\n\t"
"pushl %edx\n\t"
"xorl %ebp,%ebp\n\t"
"call *%ecx\n\t"
"movl %esi,%esp\n\t"
"popl %esi\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
__ASM_CFI(".cfi_same_value %esi\n\t")
"popl %ebp\n\t"
__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
__ASM_CFI(".cfi_same_value %ebp\n\t")
"ret" )
#elif defined(__i386__) && defined(_MSC_VER)
__declspec(naked) int wine_call_on_stack( int (*func)(void *), void *arg, void *stack )
{
__asm push ebp;
__asm push esi;
__asm mov ecx, 12[esp];
__asm mov edx, 16[esp];
__asm mov esi, 20[esp];
__asm xchg esp, esi;
__asm push edx;
__asm xor ebp, ebp;
__asm call [ecx];
__asm mov esp, esi;
__asm pop esi;
__asm pop ebp;
__asm ret;
}
#elif defined(__x86_64__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_call_on_stack,
"pushq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
"movq %rsp,%rbp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
"movq %rdi,%rax\n\t" /* func */
"movq %rsi,%rdi\n\t" /* arg */
"andq $~15,%rdx\n\t" /* stack */
"movq %rdx,%rsp\n\t"
"callq *%rax\n\t" /* call func */
"movq %rbp,%rsp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
"popq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
__ASM_CFI(".cfi_same_value %rbp\n\t")
"ret")
#elif defined(__powerpc__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_call_on_stack,
"mflr 0\n\t" /* get return address */
"stw 0, 4(1)\n\t" /* save return address */
"subi 5, 5, 16\n\t" /* reserve space on new stack */
"stw 1, 12(5)\n\t" /* store old sp */
"mtctr 3\n\t" /* func -> ctr */
"mr 3,4\n\t" /* args -> function param 1 (r3) */
"mr 1,5\n\t" /* stack */
"li 0, 0\n\t" /* zero */
"stw 0, 0(1)\n\t" /* bottom of stack */
"stwu 1, -16(1)\n\t" /* create a frame for this function */
"bctrl\n\t" /* call ctr */
"lwz 1, 28(1)\n\t" /* fetch old sp */
"lwz 0, 4(1)\n\t" /* fetch return address */
"mtlr 0\n\t" /* return address -> lr */
"blr") /* return */
#elif defined(__arm__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_call_on_stack,
"push {r4,LR}\n\t" /* save return address on stack */
"mov r4, sp\n\t" /* store old sp in local var */
"mov sp, r2\n\t" /* stack */
"mov r2, r0\n\t" /* func -> scratch register */
"mov r0, r1\n\t" /* arg */
"blx r2\n\t" /* call func */
"mov sp, r4\n\t" /* restore old sp from local var */
"pop {r4,PC}") /* fetch return address into pc */
#elif defined(__aarch64__) && defined(__GNUC__)
__ASM_GLOBAL_FUNC( wine_call_on_stack,
"stp x29, x30, [sp,#-32]!\n\t" /* save return address on stack */
"str x19, [sp,#16]\n\t" /* save register on stack */
"mov x19, sp\n\t" /* store old sp in local var */
"mov sp, x2\n\t" /* stack */
"mov x2, x0\n\t" /* func -> scratch register */
"mov x0, x1\n\t" /* arg */
"blr x2\n\t" /* call func */
"mov sp, x19\n\t" /* restore old sp from local var */
"ldr x19, [sp,#16]\n\t" /* restore register from stack */
"ldp x29, x30, [sp],#32\n\t" /* restore return address */
"ret") /* return */
#else
#error You must implement wine_call_on_stack for your platform
#endif