2010-04-08 14:41:01 +02:00
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/*
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* Support functions for Wine exception handling
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*
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* Copyright (c) 1999, 2010 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 <stdarg.h>
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#include "winternl.h"
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#include "wine/exception.h"
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2019-05-14 12:30:46 +02:00
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#include "wine/asm.h"
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2010-04-08 14:41:01 +02:00
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2019-05-14 12:30:46 +02:00
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#ifdef __x86_64__
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2010-04-08 16:12:14 +02:00
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extern void __wine_unwind_trampoline(void);
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/* we need an extra call to make sure the stack is correctly aligned */
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__ASM_GLOBAL_FUNC( __wine_unwind_trampoline, "callq *%rax" );
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#endif
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2010-04-08 14:41:01 +02:00
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/* wrapper for RtlUnwind since it clobbers registers on Windows */
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void __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
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void (*target)(void) )
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{
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#if defined(__GNUC__) && defined(__i386__)
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int dummy1, dummy2, dummy3, dummy4;
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__asm__ __volatile__("pushl %%ebp\n\t"
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"pushl %%ebx\n\t"
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"pushl $0\n\t"
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"pushl %3\n\t"
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"pushl %2\n\t"
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"pushl %1\n\t"
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"call *%0\n\t"
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"popl %%ebx\n\t"
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"popl %%ebp"
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: "=a" (dummy1), "=S" (dummy2), "=D" (dummy3), "=c" (dummy4)
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: "0" (RtlUnwind), "1" (frame), "2" (target), "3" (record)
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: "edx", "memory" );
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2019-05-14 12:30:46 +02:00
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#elif defined(__x86_64__)
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2010-04-08 16:12:14 +02:00
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RtlUnwind( frame, __wine_unwind_trampoline, record, target );
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2010-04-08 14:41:01 +02:00
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#else
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RtlUnwind( frame, target, record, 0 );
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#endif
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for (;;) target();
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}
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static void DECLSPEC_NORETURN unwind_target(void)
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{
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__WINE_FRAME *wine_frame = (__WINE_FRAME *)__wine_get_frame();
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__wine_pop_frame( &wine_frame->frame );
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siglongjmp( wine_frame->jmp, 1 );
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}
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static void DECLSPEC_NORETURN unwind_frame( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame )
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{
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__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
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/* hack to make GetExceptionCode() work in handler */
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wine_frame->ExceptionCode = record->ExceptionCode;
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wine_frame->ExceptionRecord = wine_frame;
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__wine_rtl_unwind( frame, record, unwind_target );
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}
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DWORD __wine_exception_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
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EXCEPTION_POINTERS ptrs;
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
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return ExceptionContinueSearch;
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ptrs.ExceptionRecord = record;
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ptrs.ContextRecord = context;
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switch(wine_frame->u.filter( &ptrs ))
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{
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case EXCEPTION_CONTINUE_SEARCH:
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return ExceptionContinueSearch;
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case EXCEPTION_CONTINUE_EXECUTION:
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return ExceptionContinueExecution;
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case EXCEPTION_EXECUTE_HANDLER:
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break;
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}
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unwind_frame( record, frame );
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}
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2017-05-31 12:39:29 +02:00
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DWORD __wine_exception_ctx_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
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EXCEPTION_POINTERS ptrs;
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
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return ExceptionContinueSearch;
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ptrs.ExceptionRecord = record;
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ptrs.ContextRecord = context;
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switch(wine_frame->u.filter_ctx( &ptrs, wine_frame->ctx ))
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{
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case EXCEPTION_CONTINUE_SEARCH:
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return ExceptionContinueSearch;
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case EXCEPTION_CONTINUE_EXECUTION:
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return ExceptionContinueExecution;
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case EXCEPTION_EXECUTE_HANDLER:
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break;
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}
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unwind_frame( record, frame );
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}
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2010-04-08 14:41:01 +02:00
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DWORD __wine_exception_handler_page_fault( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
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return ExceptionContinueSearch;
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if (record->ExceptionCode != STATUS_ACCESS_VIOLATION)
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return ExceptionContinueSearch;
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unwind_frame( record, frame );
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}
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DWORD __wine_exception_handler_all( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
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return ExceptionContinueSearch;
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unwind_frame( record, frame );
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}
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DWORD __wine_finally_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
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{
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__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
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wine_frame->u.finally_func( FALSE );
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}
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return ExceptionContinueSearch;
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}
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2017-05-31 12:39:29 +02:00
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DWORD __wine_finally_ctx_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher )
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{
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if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
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{
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__WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
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wine_frame->u.finally_func_ctx( FALSE, wine_frame->ctx );
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}
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return ExceptionContinueSearch;
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}
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