/* * 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__ */