1 /* Header file for the ARM EABI unwinder
2 Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
3 Contributed by Paul Brook
5 This file is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 In addition to the permissions in the GNU General Public License, the
11 Free Software Foundation gives you unlimited permission to link the
12 compiled version of this file into combinations with other programs,
13 and to distribute those combinations without any restriction coming
14 from the use of this file. (The General Public License restrictions
15 do apply in other respects; for example, they cover modification of
16 the file, and distribution when not linked into a combine
19 This file is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; see the file COPYING. If not, write to
26 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
27 Boston, MA 02110-1301, USA. */
29 /* Language-independent unwinder header public defines. This contains both
30 ABI defined objects, and GNU support routines. */
35 #define __ARM_EABI_UNWINDER__ 1
37 #ifndef __ARM_STATIC_INLINE
38 #define __ARM_STATIC_INLINE static inline
44 typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
45 typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
46 typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
47 typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__)));
48 typedef _Unwind_Word _uw;
49 typedef unsigned _uw64 __attribute__((mode(__DI__)));
50 typedef unsigned _uw16 __attribute__((mode(__HI__)));
51 typedef unsigned _uw8 __attribute__((mode(__QI__)));
55 _URC_OK = 0, /* operation completed successfully */
56 _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
57 _URC_END_OF_STACK = 5,
58 _URC_HANDLER_FOUND = 6,
59 _URC_INSTALL_CONTEXT = 7,
60 _URC_CONTINUE_UNWIND = 8,
61 _URC_FAILURE = 9 /* unspecified failure of some kind */
67 _US_VIRTUAL_UNWIND_FRAME = 0,
68 _US_UNWIND_FRAME_STARTING = 1,
69 _US_UNWIND_FRAME_RESUME = 2,
76 /* Provided only for for compatibility with existing code. */
77 typedef int _Unwind_Action;
78 #define _UA_SEARCH_PHASE 1
79 #define _UA_CLEANUP_PHASE 2
80 #define _UA_HANDLER_FRAME 4
81 #define _UA_FORCE_UNWIND 8
82 #define _UA_END_OF_STACK 16
83 #define _URC_NO_REASON _URC_OK
85 typedef struct _Unwind_Control_Block _Unwind_Control_Block;
86 typedef struct _Unwind_Context _Unwind_Context;
87 typedef _uw _Unwind_EHT_Header;
92 struct _Unwind_Control_Block
94 unsigned exception_class __attribute__((__mode__(__DI__)));
95 void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
96 /* Unwinder cache, private fields for the unwinder's use */
99 _uw reserved1; /* Forced unwind stop fn, 0 if not forced */
100 _uw reserved2; /* Personality routine address */
101 _uw reserved3; /* Saved callsite address */
102 _uw reserved4; /* Forced unwind stop arg */
106 /* Propagation barrier cache (valid after phase 1): */
113 /* Cleanup cache (preserved over cleanup): */
119 /* Pr cache (for pr's benefit): */
122 _uw fnstart; /* function start address */
123 _Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
124 _uw additional; /* additional data */
128 long long int :0; /* Force alignment to 8-byte boundary */
131 /* Virtual Register Set*/
135 _UVRSC_CORE = 0, /* integer register */
136 _UVRSC_VFP = 1, /* vfp */
137 _UVRSC_FPA = 2, /* fpa */
138 _UVRSC_WMMXD = 3, /* Intel WMMX data register */
139 _UVRSC_WMMXC = 4 /* Intel WMMX control register */
141 _Unwind_VRS_RegClass;
152 _Unwind_VRS_DataRepresentation;
157 _UVRSR_NOT_IMPLEMENTED = 1,
162 /* Frame unwinding state. */
165 /* The current word (bytes packed msb first). */
167 /* Pointer to the next word of data. */
169 /* The number of bytes left in this word. */
171 /* The number of words pointed to by ptr. */
176 typedef _Unwind_Reason_Code (*personality_routine) (_Unwind_State,
177 _Unwind_Control_Block *, _Unwind_Context *);
179 _Unwind_VRS_Result _Unwind_VRS_Set(_Unwind_Context *, _Unwind_VRS_RegClass,
180 _uw, _Unwind_VRS_DataRepresentation,
183 _Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context *, _Unwind_VRS_RegClass,
184 _uw, _Unwind_VRS_DataRepresentation,
187 _Unwind_VRS_Result _Unwind_VRS_Pop(_Unwind_Context *, _Unwind_VRS_RegClass,
188 _uw, _Unwind_VRS_DataRepresentation);
191 /* Support functions for the PR. */
192 #define _Unwind_Exception _Unwind_Control_Block
193 typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
195 void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
196 _Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
198 /* These two should never be used. */
199 _Unwind_Ptr _Unwind_GetDataRelBase (_Unwind_Context *);
200 _Unwind_Ptr _Unwind_GetTextRelBase (_Unwind_Context *);
202 /* Interface functions: */
203 _Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block *ucbp);
204 void __attribute__((noreturn)) _Unwind_Resume(_Unwind_Control_Block *ucbp);
205 _Unwind_Reason_Code _Unwind_Resume_or_Rethrow (_Unwind_Control_Block *ucbp);
207 typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
208 (int, _Unwind_Action, _Unwind_Exception_Class,
209 _Unwind_Control_Block *, struct _Unwind_Context *, void *);
210 _Unwind_Reason_Code _Unwind_ForcedUnwind (_Unwind_Control_Block *,
211 _Unwind_Stop_Fn, void *);
212 /* @@@ Use unwind data to perform a stack backtrace. The trace callback
213 is called for every stack frame in the call chain, but no cleanup
214 actions are performed. */
215 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (_Unwind_Context *, void *);
216 _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn,
219 _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
220 void _Unwind_Complete(_Unwind_Control_Block *ucbp);
221 void _Unwind_DeleteException (_Unwind_Exception *);
223 _Unwind_Reason_Code __gnu_unwind_frame (_Unwind_Control_Block *,
225 _Unwind_Reason_Code __gnu_unwind_execute (_Unwind_Context *,
226 __gnu_unwind_state *);
228 /* Decode an R_ARM_TARGET2 relocation. */
229 static inline _Unwind_Word
230 _Unwind_decode_target2 (_Unwind_Word ptr)
234 tmp = *(_Unwind_Word *) ptr;
235 /* Zero values are always NULL. */
239 #if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__)
240 /* Pc-relative indirect. */
242 tmp = *(_Unwind_Word *) tmp;
243 #elif defined(__symbian__)
244 /* Absolute pointer. Nothing more to do. */
246 /* Pc-relative pointer. */
252 __ARM_STATIC_INLINE _Unwind_Word
253 _Unwind_GetGR (_Unwind_Context *context, int regno)
256 _Unwind_VRS_Get (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
260 __ARM_STATIC_INLINE void
261 _Unwind_SetGR (_Unwind_Context *context, int regno, _Unwind_Word val)
263 _Unwind_VRS_Set (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
267 /* Return the address of the instruction, not the actual IP value. */
268 #define _Unwind_GetIP(context) \
269 (_Unwind_GetGR (context, 15) & ~(_Unwind_Word)1)
271 #define _Unwind_GetIPInfo(context, ip_before_insn) \
272 (*ip_before_insn = 0, _Unwind_GetGR (context, 15) & ~(_Unwind_Word)1)
274 /* The dwarf unwinder doesn't understand arm/thumb state. We assume the
275 landing pad uses the same instruction set as the call site. */
276 #define _Unwind_SetIP(context, val) \
277 _Unwind_SetGR (context, 15, val | (_Unwind_GetGR (context, 15) & 1))
279 _Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *);
280 _Unwind_Ptr _Unwind_GetIPInfo (struct _Unwind_Context *, int *);
281 void _Unwind_SetIP (struct _Unwind_Context *, _Unwind_Ptr);
288 #endif /* defined UNWIND_ARM_H */