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