Sweden-Number/dlls/winecrt0/exception.c

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/*
* Support functions for Wine exception handling
*
* Copyright (c) 1999, 2010 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 <stdarg.h>
#include "winternl.h"
#include "wine/exception.h"
#include "wine/asm.h"
#if defined(__GNUC__) || defined(__clang__)
#if defined(__i386__)
__ASM_GLOBAL_FUNC( __wine_rtl_unwind,
"pushl %ebp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
"movl %esp,%ebp\n\t"
__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
"subl $8,%esp\n\t"
"pushl $0\n\t" /* retval */
"pushl 12(%ebp)\n\t" /* record */
"pushl 16(%ebp)\n\t" /* target */
"pushl 8(%ebp)\n\t" /* frame */
"call " __ASM_STDCALL("RtlUnwind",16) "\n\t"
"call *16(%ebp)" )
#elif defined(__x86_64__)
__ASM_GLOBAL_FUNC( __wine_rtl_unwind,
"pushq %rbp\n\t"
__ASM_SEH(".seh_pushreg %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_SEH(".seh_setframe %rbp,0\n\t")
__ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
"subq $0x20,%rsp\n\t"
__ASM_SEH(".seh_stackalloc 0x20\n\t")
__ASM_SEH(".seh_endprologue\n\t")
"movq %r8,%r9\n\t" /* retval = final target */
"movq %rdx,%r8\n\t" /* record */
"leaq __wine_unwind_trampoline(%rip),%rdx\n\t" /* target = trampoline */
"call " __ASM_NAME("RtlUnwind") "\n"
"__wine_unwind_trampoline:\n\t"
/* we need an extra call to make sure the stack is correctly aligned */
"callq *%rax" )
#else
void __cdecl __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
void (*target)(void) )
{
RtlUnwind( frame, target, record, 0 );
for (;;) target();
}
#endif
static void DECLSPEC_NORETURN unwind_target(void)
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)__wine_get_frame();
__wine_pop_frame( &wine_frame->frame );
for (;;) __wine_longjmp( &wine_frame->jmp, 1 );
}
static void DECLSPEC_NORETURN unwind_frame( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame )
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
/* hack to make GetExceptionCode() work in handler */
wine_frame->ExceptionCode = record->ExceptionCode;
wine_frame->ExceptionRecord = wine_frame;
__wine_rtl_unwind( frame, record, unwind_target );
}
DWORD __cdecl __wine_exception_handler( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
EXCEPTION_POINTERS ptrs;
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
return ExceptionContinueSearch;
ptrs.ExceptionRecord = record;
ptrs.ContextRecord = context;
switch(wine_frame->u.filter( &ptrs ))
{
case EXCEPTION_CONTINUE_SEARCH:
return ExceptionContinueSearch;
case EXCEPTION_CONTINUE_EXECUTION:
return ExceptionContinueExecution;
case EXCEPTION_EXECUTE_HANDLER:
break;
}
unwind_frame( record, frame );
}
DWORD __cdecl __wine_exception_ctx_handler( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
EXCEPTION_POINTERS ptrs;
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
return ExceptionContinueSearch;
ptrs.ExceptionRecord = record;
ptrs.ContextRecord = context;
switch(wine_frame->u.filter_ctx( &ptrs, wine_frame->ctx ))
{
case EXCEPTION_CONTINUE_SEARCH:
return ExceptionContinueSearch;
case EXCEPTION_CONTINUE_EXECUTION:
return ExceptionContinueExecution;
case EXCEPTION_EXECUTE_HANDLER:
break;
}
unwind_frame( record, frame );
}
DWORD __cdecl __wine_exception_handler_page_fault( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
return ExceptionContinueSearch;
if (record->ExceptionCode != STATUS_ACCESS_VIOLATION)
return ExceptionContinueSearch;
unwind_frame( record, frame );
}
DWORD __cdecl __wine_exception_handler_all( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
return ExceptionContinueSearch;
unwind_frame( record, frame );
}
DWORD __cdecl __wine_finally_handler( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
wine_frame->u.finally_func( FALSE );
}
return ExceptionContinueSearch;
}
DWORD __cdecl __wine_finally_ctx_handler( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
wine_frame->u.finally_func_ctx( FALSE, wine_frame->ctx );
}
return ExceptionContinueSearch;
}
#endif /* __GNUC__ || __clang__ */