widl: Properly align name table entries.
[wine.git] / dlls / winecrt0 / exception.c
blob58cf91172aca6ab0f3b2cbdc31d1818e6b655b67
1 /*
2 * Support functions for Wine exception handling
4 * Copyright (c) 1999, 2010 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 #include <stdarg.h>
22 #include "winternl.h"
23 #include "wine/exception.h"
24 #include "wine/asm.h"
26 #if defined(__GNUC__) || defined(__clang__)
28 #if defined(__i386__)
30 __ASM_GLOBAL_FUNC( __wine_rtl_unwind,
31 "pushl %ebp\n\t"
32 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
33 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
34 "movl %esp,%ebp\n\t"
35 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
36 "subl $8,%esp\n\t"
37 "pushl $0\n\t" /* retval */
38 "pushl 12(%ebp)\n\t" /* record */
39 "pushl 16(%ebp)\n\t" /* target */
40 "pushl 8(%ebp)\n\t" /* frame */
41 "call " __ASM_STDCALL("RtlUnwind",16) "\n\t"
42 "call *16(%ebp)" )
44 #elif defined(__x86_64__) && !defined(__arm64ec__)
46 __ASM_GLOBAL_FUNC( __wine_rtl_unwind,
47 "pushq %rbp\n\t"
48 __ASM_SEH(".seh_pushreg %rbp\n\t")
49 __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
50 __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
51 "movq %rsp,%rbp\n\t"
52 __ASM_SEH(".seh_setframe %rbp,0\n\t")
53 __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
54 "subq $0x20,%rsp\n\t"
55 __ASM_SEH(".seh_stackalloc 0x20\n\t")
56 __ASM_SEH(".seh_endprologue\n\t")
57 "movq %r8,%r9\n\t" /* retval = final target */
58 "movq %rdx,%r8\n\t" /* record */
59 "leaq __wine_unwind_trampoline(%rip),%rdx\n\t" /* target = trampoline */
60 "call " __ASM_NAME("RtlUnwind") "\n"
61 "__wine_unwind_trampoline:\n\t"
62 /* we need an extra call to make sure the stack is correctly aligned */
63 "callq *%rax" )
65 #else
67 void __cdecl __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
68 void (*target)(void) )
70 RtlUnwind( frame, target, record, 0 );
71 for (;;) target();
74 #endif
76 static void DECLSPEC_NORETURN unwind_target(void)
78 __WINE_FRAME *wine_frame = (__WINE_FRAME *)__wine_get_frame();
79 __wine_pop_frame( &wine_frame->frame );
80 for (;;) __wine_longjmp( &wine_frame->jmp, 1 );
83 static void DECLSPEC_NORETURN unwind_frame( EXCEPTION_RECORD *record,
84 EXCEPTION_REGISTRATION_RECORD *frame )
86 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
88 /* hack to make GetExceptionCode() work in handler */
89 wine_frame->ExceptionCode = record->ExceptionCode;
90 wine_frame->ExceptionRecord = wine_frame;
92 __wine_rtl_unwind( frame, record, unwind_target );
95 DWORD __cdecl __wine_exception_handler( EXCEPTION_RECORD *record,
96 EXCEPTION_REGISTRATION_RECORD *frame,
97 CONTEXT *context,
98 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
100 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
101 EXCEPTION_POINTERS ptrs;
103 if (record->ExceptionFlags & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND | EXCEPTION_NESTED_CALL))
104 return ExceptionContinueSearch;
106 ptrs.ExceptionRecord = record;
107 ptrs.ContextRecord = context;
108 switch(wine_frame->u.filter( &ptrs ))
110 case EXCEPTION_CONTINUE_SEARCH:
111 return ExceptionContinueSearch;
112 case EXCEPTION_CONTINUE_EXECUTION:
113 return ExceptionContinueExecution;
114 case EXCEPTION_EXECUTE_HANDLER:
115 break;
117 unwind_frame( record, frame );
120 DWORD __cdecl __wine_exception_ctx_handler( EXCEPTION_RECORD *record,
121 EXCEPTION_REGISTRATION_RECORD *frame,
122 CONTEXT *context,
123 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
125 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
126 EXCEPTION_POINTERS ptrs;
128 if (record->ExceptionFlags & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND | EXCEPTION_NESTED_CALL))
129 return ExceptionContinueSearch;
131 ptrs.ExceptionRecord = record;
132 ptrs.ContextRecord = context;
133 switch(wine_frame->u.filter_ctx( &ptrs, wine_frame->ctx ))
135 case EXCEPTION_CONTINUE_SEARCH:
136 return ExceptionContinueSearch;
137 case EXCEPTION_CONTINUE_EXECUTION:
138 return ExceptionContinueExecution;
139 case EXCEPTION_EXECUTE_HANDLER:
140 break;
142 unwind_frame( record, frame );
145 DWORD __cdecl __wine_exception_handler_page_fault( EXCEPTION_RECORD *record,
146 EXCEPTION_REGISTRATION_RECORD *frame,
147 CONTEXT *context,
148 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
150 if (record->ExceptionFlags & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND | EXCEPTION_NESTED_CALL))
151 return ExceptionContinueSearch;
152 if (record->ExceptionCode != STATUS_ACCESS_VIOLATION)
153 return ExceptionContinueSearch;
154 unwind_frame( record, frame );
157 DWORD __cdecl __wine_exception_handler_all( EXCEPTION_RECORD *record,
158 EXCEPTION_REGISTRATION_RECORD *frame,
159 CONTEXT *context,
160 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
162 if (record->ExceptionFlags & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND | EXCEPTION_NESTED_CALL))
163 return ExceptionContinueSearch;
164 unwind_frame( record, frame );
167 DWORD __cdecl __wine_finally_handler( EXCEPTION_RECORD *record,
168 EXCEPTION_REGISTRATION_RECORD *frame,
169 CONTEXT *context,
170 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
172 if (record->ExceptionFlags & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND))
174 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
175 wine_frame->u.finally_func( FALSE );
177 return ExceptionContinueSearch;
180 DWORD __cdecl __wine_finally_ctx_handler( EXCEPTION_RECORD *record,
181 EXCEPTION_REGISTRATION_RECORD *frame,
182 CONTEXT *context,
183 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
185 if (record->ExceptionFlags & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND))
187 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
188 wine_frame->u.finally_func_ctx( FALSE, wine_frame->ctx );
190 return ExceptionContinueSearch;
193 #endif /* __GNUC__ || __clang__ */