Mercurial > hg > CbC > CbC_gcc

comparison gcc/config/arm/unwind-arm.h @ 0:a06113de4d67

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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 /* Header file for the ARM EABI unwinder
2 Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Paul Brook
5
6 This file is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 3, or (at your option) any
9 later version.
10
11 This file is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public 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 /* Language-independent unwinder header public defines. This contains both
26 ABI defined objects, and GNU support routines. */
27
28 #ifndef UNWIND_ARM_H
29 #define UNWIND_ARM_H
30
31 #define __ARM_EABI_UNWINDER__ 1
32
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
37 typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
38 typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
39 typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__)));
40 typedef _Unwind_Word _uw;
41 typedef unsigned _uw64 __attribute__((mode(__DI__)));
42 typedef unsigned _uw16 __attribute__((mode(__HI__)));
43 typedef unsigned _uw8 __attribute__((mode(__QI__)));
44
45 typedef enum
46 {
47 _URC_OK = 0, /* operation completed successfully */
48 _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
49 _URC_END_OF_STACK = 5,
50 _URC_HANDLER_FOUND = 6,
51 _URC_INSTALL_CONTEXT = 7,
52 _URC_CONTINUE_UNWIND = 8,
53 _URC_FAILURE = 9 /* unspecified failure of some kind */
54 }
55 _Unwind_Reason_Code;
56
57 typedef enum
58 {
59 _US_VIRTUAL_UNWIND_FRAME = 0,
60 _US_UNWIND_FRAME_STARTING = 1,
61 _US_UNWIND_FRAME_RESUME = 2,
62 _US_ACTION_MASK = 3,
63 _US_FORCE_UNWIND = 8,
64 _US_END_OF_STACK = 16
65 }
66 _Unwind_State;
67
68 /* Provided only for for compatibility with existing code. */
69 typedef int _Unwind_Action;
70 #define _UA_SEARCH_PHASE 1
71 #define _UA_CLEANUP_PHASE 2
72 #define _UA_HANDLER_FRAME 4
73 #define _UA_FORCE_UNWIND 8
74 #define _UA_END_OF_STACK 16
75 #define _URC_NO_REASON _URC_OK
76
77 typedef struct _Unwind_Control_Block _Unwind_Control_Block;
78 typedef struct _Unwind_Context _Unwind_Context;
79 typedef _uw _Unwind_EHT_Header;
80
81
82 /* UCB: */
83
84 struct _Unwind_Control_Block
85 {
86 char exception_class[8];
87 void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
88 /* Unwinder cache, private fields for the unwinder's use */
89 struct
90 {
91 _uw reserved1; /* Forced unwind stop fn, 0 if not forced */
92 _uw reserved2; /* Personality routine address */
93 _uw reserved3; /* Saved callsite address */
94 _uw reserved4; /* Forced unwind stop arg */
95 _uw reserved5;
96 }
97 unwinder_cache;
98 /* Propagation barrier cache (valid after phase 1): */
99 struct
100 {
101 _uw sp;
102 _uw bitpattern[5];
103 }
104 barrier_cache;
105 /* Cleanup cache (preserved over cleanup): */
106 struct
107 {
108 _uw bitpattern[4];
109 }
110 cleanup_cache;
111 /* Pr cache (for pr's benefit): */
112 struct
113 {
114 _uw fnstart; /* function start address */
115 _Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
116 _uw additional; /* additional data */
117 _uw reserved1;
118 }
119 pr_cache;
120 long long int :0; /* Force alignment to 8-byte boundary */
121 };
122
123 /* Virtual Register Set*/
124
125 typedef enum
126 {
127 _UVRSC_CORE = 0, /* integer register */
128 _UVRSC_VFP = 1, /* vfp */
129 _UVRSC_FPA = 2, /* fpa */
130 _UVRSC_WMMXD = 3, /* Intel WMMX data register */
131 _UVRSC_WMMXC = 4 /* Intel WMMX control register */
132 }
133 _Unwind_VRS_RegClass;
134
135 typedef enum
136 {
137 _UVRSD_UINT32 = 0,
138 _UVRSD_VFPX = 1,
139 _UVRSD_FPAX = 2,
140 _UVRSD_UINT64 = 3,
141 _UVRSD_FLOAT = 4,
142 _UVRSD_DOUBLE = 5
143 }
144 _Unwind_VRS_DataRepresentation;
145
146 typedef enum
147 {
148 _UVRSR_OK = 0,
149 _UVRSR_NOT_IMPLEMENTED = 1,
150 _UVRSR_FAILED = 2
151 }
152 _Unwind_VRS_Result;
153
154 /* Frame unwinding state. */
155 typedef struct
156 {
157 /* The current word (bytes packed msb first). */
158 _uw data;
159 /* Pointer to the next word of data. */
160 _uw *next;
161 /* The number of bytes left in this word. */
162 _uw8 bytes_left;
163 /* The number of words pointed to by ptr. */
164 _uw8 words_left;
165 }
166 __gnu_unwind_state;
167
168 typedef _Unwind_Reason_Code (*personality_routine) (_Unwind_State,
169 _Unwind_Control_Block *, _Unwind_Context *);
170
171 _Unwind_VRS_Result _Unwind_VRS_Set(_Unwind_Context *, _Unwind_VRS_RegClass,
172 _uw, _Unwind_VRS_DataRepresentation,
173 void *);
174
175 _Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context *, _Unwind_VRS_RegClass,
176 _uw, _Unwind_VRS_DataRepresentation,
177 void *);
178
179 _Unwind_VRS_Result _Unwind_VRS_Pop(_Unwind_Context *, _Unwind_VRS_RegClass,
180 _uw, _Unwind_VRS_DataRepresentation);
181
182
183 /* Support functions for the PR. */
184 #define _Unwind_Exception _Unwind_Control_Block
185 typedef char _Unwind_Exception_Class[8];
186
187 void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
188 _Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
189
190 /* These two should never be used. */
191 _Unwind_Ptr _Unwind_GetDataRelBase (_Unwind_Context *);
192 _Unwind_Ptr _Unwind_GetTextRelBase (_Unwind_Context *);
193
194 /* Interface functions: */
195 _Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block *ucbp);
196 void __attribute__((noreturn)) _Unwind_Resume(_Unwind_Control_Block *ucbp);
197 _Unwind_Reason_Code _Unwind_Resume_or_Rethrow (_Unwind_Control_Block *ucbp);
198
199 typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
200 (int, _Unwind_Action, _Unwind_Exception_Class,
201 _Unwind_Control_Block *, struct _Unwind_Context *, void *);
202 _Unwind_Reason_Code _Unwind_ForcedUnwind (_Unwind_Control_Block *,
203 _Unwind_Stop_Fn, void *);
204 /* @@@ Use unwind data to perform a stack backtrace. The trace callback
205 is called for every stack frame in the call chain, but no cleanup
206 actions are performed. */
207 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (_Unwind_Context *, void *);
208 _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn,
209 void*);
210
211 _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
212 void _Unwind_Complete(_Unwind_Control_Block *ucbp);
213 void _Unwind_DeleteException (_Unwind_Exception *);
214
215 _Unwind_Reason_Code __gnu_unwind_frame (_Unwind_Control_Block *,
216 _Unwind_Context *);
217 _Unwind_Reason_Code __gnu_unwind_execute (_Unwind_Context *,
218 __gnu_unwind_state *);
219
220 /* Decode an R_ARM_TARGET2 relocation. */
221 static inline _Unwind_Word
222 _Unwind_decode_target2 (_Unwind_Word ptr)
223 {
224 _Unwind_Word tmp;
225
226 tmp = *(_Unwind_Word *) ptr;
227 /* Zero values are always NULL. */
228 if (!tmp)
229 return 0;
230
231 #if (defined(linux) && !defined(__uClinux__)) || defined(__NetBSD__)
232 /* Pc-relative indirect. */
233 tmp += ptr;
234 tmp = *(_Unwind_Word *) tmp;
235 #elif defined(__symbian__) || defined(__uClinux__)
236 /* Absolute pointer. Nothing more to do. */
237 #else
238 /* Pc-relative pointer. */
239 tmp += ptr;
240 #endif
241 return tmp;
242 }
243
244 static inline _Unwind_Word
245 _Unwind_GetGR (_Unwind_Context *context, int regno)
246 {
247 _uw val;
248 _Unwind_VRS_Get (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
249 return val;
250 }
251
252 /* Return the address of the instruction, not the actual IP value. */
253 #define _Unwind_GetIP(context) \
254 (_Unwind_GetGR (context, 15) & ~(_Unwind_Word)1)
255
256 #define _Unwind_GetIPInfo(context, ip_before_insn) \
257 (*ip_before_insn = 0, _Unwind_GetGR (context, 15) & ~(_Unwind_Word)1)
258
259 static inline void
260 _Unwind_SetGR (_Unwind_Context *context, int regno, _Unwind_Word val)
261 {
262 _Unwind_VRS_Set (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
263 }
264
265 /* The dwarf unwinder doesn't understand arm/thumb state. We assume the
266 landing pad uses the same instruction set as the call site. */
267 #define _Unwind_SetIP(context, val) \
268 _Unwind_SetGR (context, 15, val | (_Unwind_GetGR (context, 15) & 1))
269
270 /* leb128 type numbers have a potentially unlimited size.
271 The target of the following definitions of _sleb128_t and _uleb128_t
272 is to have efficient data types large enough to hold the leb128 type
273 numbers used in the unwind code. */
274 typedef long _sleb128_t;
275 typedef unsigned long _uleb128_t;
276
277 #ifdef __cplusplus
278 } /* extern "C" */
279 #endif
280
281 #endif /* defined UNWIND_ARM_H */