Mercurial > hg > CbC > CbC_gcc
comparison gcc/unwind-generic.h @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
---|---|
date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a06113de4d67 |
---|---|
1 /* Exception handling and frame unwind runtime interface routines. | |
2 Copyright (C) 2001, 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc. | |
3 | |
4 This file is part of GCC. | |
5 | |
6 GCC is free software; you can redistribute it and/or modify it | |
7 under the terms of the GNU General Public License as published by | |
8 the Free Software Foundation; either version 3, or (at your option) | |
9 any later version. | |
10 | |
11 GCC is distributed in the hope that it will be useful, but WITHOUT | |
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 License for more details. | |
15 | |
16 Under Section 7 of GPL version 3, you are granted additional | |
17 permissions described in the GCC Runtime Library Exception, version | |
18 3.1, as published by the Free Software Foundation. | |
19 | |
20 You should have received a copy of the GNU General Public License and | |
21 a copy of the GCC Runtime Library Exception along with this program; | |
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 <http://www.gnu.org/licenses/>. */ | |
24 | |
25 /* This is derived from the C++ ABI for IA-64. Where we diverge | |
26 for cross-architecture compatibility are noted with "@@@". */ | |
27 | |
28 #ifndef _UNWIND_H | |
29 #define _UNWIND_H | |
30 | |
31 #ifndef HIDE_EXPORTS | |
32 #pragma GCC visibility push(default) | |
33 #endif | |
34 | |
35 #ifdef __cplusplus | |
36 extern "C" { | |
37 #endif | |
38 | |
39 /* Level 1: Base ABI */ | |
40 | |
41 /* @@@ The IA-64 ABI uses uint64 throughout. Most places this is | |
42 inefficient for 32-bit and smaller machines. */ | |
43 typedef unsigned _Unwind_Word __attribute__((__mode__(__unwind_word__))); | |
44 typedef signed _Unwind_Sword __attribute__((__mode__(__unwind_word__))); | |
45 #if defined(__ia64__) && defined(__hpux__) | |
46 typedef unsigned _Unwind_Ptr __attribute__((__mode__(__word__))); | |
47 #else | |
48 typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__))); | |
49 #endif | |
50 typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__))); | |
51 | |
52 /* @@@ The IA-64 ABI uses a 64-bit word to identify the producer and | |
53 consumer of an exception. We'll go along with this for now even on | |
54 32-bit machines. We'll need to provide some other option for | |
55 16-bit machines and for machines with > 8 bits per byte. */ | |
56 typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__))); | |
57 | |
58 /* The unwind interface uses reason codes in several contexts to | |
59 identify the reasons for failures or other actions. */ | |
60 typedef enum | |
61 { | |
62 _URC_NO_REASON = 0, | |
63 _URC_FOREIGN_EXCEPTION_CAUGHT = 1, | |
64 _URC_FATAL_PHASE2_ERROR = 2, | |
65 _URC_FATAL_PHASE1_ERROR = 3, | |
66 _URC_NORMAL_STOP = 4, | |
67 _URC_END_OF_STACK = 5, | |
68 _URC_HANDLER_FOUND = 6, | |
69 _URC_INSTALL_CONTEXT = 7, | |
70 _URC_CONTINUE_UNWIND = 8 | |
71 } _Unwind_Reason_Code; | |
72 | |
73 | |
74 /* The unwind interface uses a pointer to an exception header object | |
75 as its representation of an exception being thrown. In general, the | |
76 full representation of an exception object is language- and | |
77 implementation-specific, but it will be prefixed by a header | |
78 understood by the unwind interface. */ | |
79 | |
80 struct _Unwind_Exception; | |
81 | |
82 typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code, | |
83 struct _Unwind_Exception *); | |
84 | |
85 struct _Unwind_Exception | |
86 { | |
87 _Unwind_Exception_Class exception_class; | |
88 _Unwind_Exception_Cleanup_Fn exception_cleanup; | |
89 _Unwind_Word private_1; | |
90 _Unwind_Word private_2; | |
91 | |
92 /* @@@ The IA-64 ABI says that this structure must be double-word aligned. | |
93 Taking that literally does not make much sense generically. Instead we | |
94 provide the maximum alignment required by any type for the machine. */ | |
95 } __attribute__((__aligned__)); | |
96 | |
97 | |
98 /* The ACTIONS argument to the personality routine is a bitwise OR of one | |
99 or more of the following constants. */ | |
100 typedef int _Unwind_Action; | |
101 | |
102 #define _UA_SEARCH_PHASE 1 | |
103 #define _UA_CLEANUP_PHASE 2 | |
104 #define _UA_HANDLER_FRAME 4 | |
105 #define _UA_FORCE_UNWIND 8 | |
106 #define _UA_END_OF_STACK 16 | |
107 | |
108 /* The target can override this macro to define any back-end-specific | |
109 attributes required for the lowest-level stack frame. */ | |
110 #ifndef LIBGCC2_UNWIND_ATTRIBUTE | |
111 #define LIBGCC2_UNWIND_ATTRIBUTE | |
112 #endif | |
113 | |
114 /* This is an opaque type used to refer to a system-specific data | |
115 structure used by the system unwinder. This context is created and | |
116 destroyed by the system, and passed to the personality routine | |
117 during unwinding. */ | |
118 struct _Unwind_Context; | |
119 | |
120 /* Raise an exception, passing along the given exception object. */ | |
121 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
122 _Unwind_RaiseException (struct _Unwind_Exception *); | |
123 | |
124 /* Raise an exception for forced unwinding. */ | |
125 | |
126 typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn) | |
127 (int, _Unwind_Action, _Unwind_Exception_Class, | |
128 struct _Unwind_Exception *, struct _Unwind_Context *, void *); | |
129 | |
130 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
131 _Unwind_ForcedUnwind (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *); | |
132 | |
133 /* Helper to invoke the exception_cleanup routine. */ | |
134 extern void _Unwind_DeleteException (struct _Unwind_Exception *); | |
135 | |
136 /* Resume propagation of an existing exception. This is used after | |
137 e.g. executing cleanup code, and not to implement rethrowing. */ | |
138 extern void LIBGCC2_UNWIND_ATTRIBUTE | |
139 _Unwind_Resume (struct _Unwind_Exception *); | |
140 | |
141 /* @@@ Resume propagation of a FORCE_UNWIND exception, or to rethrow | |
142 a normal exception that was handled. */ | |
143 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
144 _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *); | |
145 | |
146 /* @@@ Use unwind data to perform a stack backtrace. The trace callback | |
147 is called for every stack frame in the call chain, but no cleanup | |
148 actions are performed. */ | |
149 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) | |
150 (struct _Unwind_Context *, void *); | |
151 | |
152 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
153 _Unwind_Backtrace (_Unwind_Trace_Fn, void *); | |
154 | |
155 /* These functions are used for communicating information about the unwind | |
156 context (i.e. the unwind descriptors and the user register state) between | |
157 the unwind library and the personality routine and landing pad. Only | |
158 selected registers may be manipulated. */ | |
159 | |
160 extern _Unwind_Word _Unwind_GetGR (struct _Unwind_Context *, int); | |
161 extern void _Unwind_SetGR (struct _Unwind_Context *, int, _Unwind_Word); | |
162 | |
163 extern _Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *); | |
164 extern _Unwind_Ptr _Unwind_GetIPInfo (struct _Unwind_Context *, int *); | |
165 extern void _Unwind_SetIP (struct _Unwind_Context *, _Unwind_Ptr); | |
166 | |
167 /* @@@ Retrieve the CFA of the given context. */ | |
168 extern _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *); | |
169 | |
170 extern void *_Unwind_GetLanguageSpecificData (struct _Unwind_Context *); | |
171 | |
172 extern _Unwind_Ptr _Unwind_GetRegionStart (struct _Unwind_Context *); | |
173 | |
174 | |
175 /* The personality routine is the function in the C++ (or other language) | |
176 runtime library which serves as an interface between the system unwind | |
177 library and language-specific exception handling semantics. It is | |
178 specific to the code fragment described by an unwind info block, and | |
179 it is always referenced via the pointer in the unwind info block, and | |
180 hence it has no ABI-specified name. | |
181 | |
182 Note that this implies that two different C++ implementations can | |
183 use different names, and have different contents in the language | |
184 specific data area. Moreover, that the language specific data | |
185 area contains no version info because name of the function invoked | |
186 provides more effective versioning by detecting at link time the | |
187 lack of code to handle the different data format. */ | |
188 | |
189 typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn) | |
190 (int, _Unwind_Action, _Unwind_Exception_Class, | |
191 struct _Unwind_Exception *, struct _Unwind_Context *); | |
192 | |
193 /* @@@ The following alternate entry points are for setjmp/longjmp | |
194 based unwinding. */ | |
195 | |
196 struct SjLj_Function_Context; | |
197 extern void _Unwind_SjLj_Register (struct SjLj_Function_Context *); | |
198 extern void _Unwind_SjLj_Unregister (struct SjLj_Function_Context *); | |
199 | |
200 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
201 _Unwind_SjLj_RaiseException (struct _Unwind_Exception *); | |
202 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
203 _Unwind_SjLj_ForcedUnwind (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *); | |
204 extern void LIBGCC2_UNWIND_ATTRIBUTE | |
205 _Unwind_SjLj_Resume (struct _Unwind_Exception *); | |
206 extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE | |
207 _Unwind_SjLj_Resume_or_Rethrow (struct _Unwind_Exception *); | |
208 | |
209 /* @@@ The following provide access to the base addresses for text | |
210 and data-relative addressing in the LDSA. In order to stay link | |
211 compatible with the standard ABI for IA-64, we inline these. */ | |
212 | |
213 #ifdef __ia64__ | |
214 #include <stdlib.h> | |
215 | |
216 static inline _Unwind_Ptr | |
217 _Unwind_GetDataRelBase (struct _Unwind_Context *_C) | |
218 { | |
219 /* The GP is stored in R1. */ | |
220 return _Unwind_GetGR (_C, 1); | |
221 } | |
222 | |
223 static inline _Unwind_Ptr | |
224 _Unwind_GetTextRelBase (struct _Unwind_Context *_C __attribute__ ((__unused__))) | |
225 { | |
226 abort (); | |
227 return 0; | |
228 } | |
229 | |
230 /* @@@ Retrieve the Backing Store Pointer of the given context. */ | |
231 extern _Unwind_Word _Unwind_GetBSP (struct _Unwind_Context *); | |
232 #else | |
233 extern _Unwind_Ptr _Unwind_GetDataRelBase (struct _Unwind_Context *); | |
234 extern _Unwind_Ptr _Unwind_GetTextRelBase (struct _Unwind_Context *); | |
235 #endif | |
236 | |
237 /* @@@ Given an address, return the entry point of the function that | |
238 contains it. */ | |
239 extern void * _Unwind_FindEnclosingFunction (void *pc); | |
240 | |
241 #ifndef __SIZEOF_LONG__ | |
242 #error "__SIZEOF_LONG__ macro not defined" | |
243 #endif | |
244 | |
245 #ifndef __SIZEOF_POINTER__ | |
246 #error "__SIZEOF_POINTER__ macro not defined" | |
247 #endif | |
248 | |
249 | |
250 /* leb128 type numbers have a potentially unlimited size. | |
251 The target of the following definitions of _sleb128_t and _uleb128_t | |
252 is to have efficient data types large enough to hold the leb128 type | |
253 numbers used in the unwind code. | |
254 Mostly these types will simply be defined to long and unsigned long | |
255 except when a unsigned long data type on the target machine is not | |
256 capable of storing a pointer. */ | |
257 | |
258 #if __SIZEOF_LONG__ >= __SIZEOF_POINTER__ | |
259 typedef long _sleb128_t; | |
260 typedef unsigned long _uleb128_t; | |
261 #elif __SIZEOF_LONG_LONG__ >= __SIZEOF_POINTER__ | |
262 typedef long long _sleb128_t; | |
263 typedef unsigned long long _uleb128_t; | |
264 #else | |
265 # error "What type shall we use for _sleb128_t?" | |
266 #endif | |
267 | |
268 #ifdef __cplusplus | |
269 } | |
270 #endif | |
271 | |
272 #ifndef HIDE_EXPORTS | |
273 #pragma GCC visibility pop | |
274 #endif | |
275 | |
276 #endif /* unwind.h */ |