1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
|
/*===---- unwind.h - Stack unwinding ----------------------------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
*===-----------------------------------------------------------------------===
*/
/* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
#if defined(__APPLE__) && __has_include_next(<unwind.h>)
/* Darwin (from 11.x on) provide an unwind.h. If that's available,
* use it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE,
* so define that around the include.*/
# ifndef _GNU_SOURCE
# define _SHOULD_UNDEFINE_GNU_SOURCE
# define _GNU_SOURCE
# endif
// libunwind's unwind.h reflects the current visibility. However, Mozilla
// builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the
// visibility to default and export its contents. gcc also allows users to
// override its override by #defining HIDE_EXPORTS (but note, this only obeys
// the user's -fvisibility setting; it doesn't hide any exports on its own). We
// imitate gcc's header here:
# ifdef HIDE_EXPORTS
# include_next <unwind.h>
# else
# pragma GCC visibility push(default)
# include_next <unwind.h>
# pragma GCC visibility pop
# endif
# ifdef _SHOULD_UNDEFINE_GNU_SOURCE
# undef _GNU_SOURCE
# undef _SHOULD_UNDEFINE_GNU_SOURCE
# endif
#else
#ifndef __CLANG_UNWIND_H
#define __CLANG_UNWIND_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/* It is a bit strange for a header to play with the visibility of the
symbols it declares, but this matches gcc's behavior and some programs
depend on it */
#ifndef HIDE_EXPORTS
#pragma GCC visibility push(default)
#endif
typedef uintptr_t _Unwind_Word __attribute__((__mode__(__unwind_word__)));
typedef intptr_t _Unwind_Sword __attribute__((__mode__(__unwind_word__)));
typedef uintptr_t _Unwind_Ptr;
typedef uintptr_t _Unwind_Internal_Ptr;
typedef uint64_t _Unwind_Exception_Class;
typedef intptr_t _sleb128_t;
typedef uintptr_t _uleb128_t;
struct _Unwind_Context;
#if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
defined(__ARM_DWARF_EH__) || defined(__SEH__))
struct _Unwind_Control_Block;
typedef struct _Unwind_Control_Block _Unwind_Exception; /* Alias */
#else
struct _Unwind_Exception;
typedef struct _Unwind_Exception _Unwind_Exception;
#endif
typedef enum {
_URC_NO_REASON = 0,
#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
!defined(__ARM_DWARF_EH__) && !defined(__SEH__)
_URC_OK = 0, /* used by ARM EHABI */
#endif
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_FATAL_PHASE2_ERROR = 2,
_URC_FATAL_PHASE1_ERROR = 3,
_URC_NORMAL_STOP = 4,
_URC_END_OF_STACK = 5,
_URC_HANDLER_FOUND = 6,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8,
#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
!defined(__ARM_DWARF_EH__) && !defined(__SEH__)
_URC_FAILURE = 9 /* used by ARM EHABI */
#endif
} _Unwind_Reason_Code;
typedef enum {
_UA_SEARCH_PHASE = 1,
_UA_CLEANUP_PHASE = 2,
_UA_HANDLER_FRAME = 4,
_UA_FORCE_UNWIND = 8,
_UA_END_OF_STACK = 16 /* gcc extension to C++ ABI */
} _Unwind_Action;
typedef void (*_Unwind_Exception_Cleanup_Fn)(_Unwind_Reason_Code,
_Unwind_Exception *);
#if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
defined(__ARM_DWARF_EH__) || defined(__SEH__))
typedef struct _Unwind_Control_Block _Unwind_Control_Block;
typedef uint32_t _Unwind_EHT_Header;
struct _Unwind_Control_Block {
uint64_t exception_class;
void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
/* unwinder cache (private fields for the unwinder's use) */
struct {
uint32_t reserved1; /* forced unwind stop function, 0 if not forced */
uint32_t reserved2; /* personality routine */
uint32_t reserved3; /* callsite */
uint32_t reserved4; /* forced unwind stop argument */
uint32_t reserved5;
} unwinder_cache;
/* propagation barrier cache (valid after phase 1) */
struct {
uint32_t sp;
uint32_t bitpattern[5];
} barrier_cache;
/* cleanup cache (preserved over cleanup) */
struct {
uint32_t bitpattern[4];
} cleanup_cache;
/* personality cache (for personality's benefit) */
struct {
uint32_t fnstart; /* function start address */
_Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
uint32_t additional; /* additional data */
uint32_t reserved1;
} pr_cache;
long long int : 0; /* force alignment of next item to 8-byte boundary */
} __attribute__((__aligned__(8)));
#else
struct _Unwind_Exception {
_Unwind_Exception_Class exception_class;
_Unwind_Exception_Cleanup_Fn exception_cleanup;
#if !defined (__USING_SJLJ_EXCEPTIONS__) && defined (__SEH__)
_Unwind_Word private_[6];
#else
_Unwind_Word private_1;
_Unwind_Word private_2;
#endif
/* The Itanium ABI requires that _Unwind_Exception objects are "double-word
* aligned". GCC has interpreted this to mean "use the maximum useful
* alignment for the target"; so do we. */
} __attribute__((__aligned__));
#endif
typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)(int, _Unwind_Action,
_Unwind_Exception_Class,
_Unwind_Exception *,
struct _Unwind_Context *,
void *);
typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(int, _Unwind_Action,
_Unwind_Exception_Class,
_Unwind_Exception *,
struct _Unwind_Context *);
typedef _Unwind_Personality_Fn __personality_routine;
typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context *,
void *);
#if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
defined(__ARM_DWARF_EH__) || defined(__SEH__))
typedef enum {
_UVRSC_CORE = 0, /* integer register */
_UVRSC_VFP = 1, /* vfp */
_UVRSC_WMMXD = 3, /* Intel WMMX data register */
_UVRSC_WMMXC = 4, /* Intel WMMX control register */
_UVRSC_PSEUDO = 5 /* Special purpose pseudo register */
} _Unwind_VRS_RegClass;
typedef enum {
_UVRSD_UINT32 = 0,
_UVRSD_VFPX = 1,
_UVRSD_UINT64 = 3,
_UVRSD_FLOAT = 4,
_UVRSD_DOUBLE = 5
} _Unwind_VRS_DataRepresentation;
typedef enum {
_UVRSR_OK = 0,
_UVRSR_NOT_IMPLEMENTED = 1,
_UVRSR_FAILED = 2
} _Unwind_VRS_Result;
typedef uint32_t _Unwind_State;
#define _US_VIRTUAL_UNWIND_FRAME ((_Unwind_State)0)
#define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1)
#define _US_UNWIND_FRAME_RESUME ((_Unwind_State)2)
#define _US_ACTION_MASK ((_Unwind_State)3)
#define _US_FORCE_UNWIND ((_Unwind_State)8)
_Unwind_VRS_Result _Unwind_VRS_Get(struct _Unwind_Context *__context,
_Unwind_VRS_RegClass __regclass,
uint32_t __regno,
_Unwind_VRS_DataRepresentation __representation,
void *__valuep);
_Unwind_VRS_Result _Unwind_VRS_Set(struct _Unwind_Context *__context,
_Unwind_VRS_RegClass __regclass,
uint32_t __regno,
_Unwind_VRS_DataRepresentation __representation,
void *__valuep);
static __inline__
_Unwind_Word _Unwind_GetGR(struct _Unwind_Context *__context, int __index) {
_Unwind_Word __value;
_Unwind_VRS_Get(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value);
return __value;
}
static __inline__
void _Unwind_SetGR(struct _Unwind_Context *__context, int __index,
_Unwind_Word __value) {
_Unwind_VRS_Set(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value);
}
static __inline__
_Unwind_Word _Unwind_GetIP(struct _Unwind_Context *__context) {
_Unwind_Word __ip = _Unwind_GetGR(__context, 15);
return __ip & ~(_Unwind_Word)(0x1); /* Remove thumb mode bit. */
}
static __inline__
void _Unwind_SetIP(struct _Unwind_Context *__context, _Unwind_Word __value) {
_Unwind_Word __thumb_mode_bit = _Unwind_GetGR(__context, 15) & 0x1;
_Unwind_SetGR(__context, 15, __value | __thumb_mode_bit);
}
#else
_Unwind_Word _Unwind_GetGR(struct _Unwind_Context *, int);
void _Unwind_SetGR(struct _Unwind_Context *, int, _Unwind_Word);
_Unwind_Word _Unwind_GetIP(struct _Unwind_Context *);
void _Unwind_SetIP(struct _Unwind_Context *, _Unwind_Word);
#endif
_Unwind_Word _Unwind_GetIPInfo(struct _Unwind_Context *, int *);
_Unwind_Word _Unwind_GetCFA(struct _Unwind_Context *);
_Unwind_Word _Unwind_GetBSP(struct _Unwind_Context *);
void *_Unwind_GetLanguageSpecificData(struct _Unwind_Context *);
_Unwind_Ptr _Unwind_GetRegionStart(struct _Unwind_Context *);
/* DWARF EH functions; currently not available on Darwin/ARM */
#if !defined(__APPLE__) || !defined(__arm__)
_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Exception *);
_Unwind_Reason_Code _Unwind_ForcedUnwind(_Unwind_Exception *, _Unwind_Stop_Fn,
void *);
void _Unwind_DeleteException(_Unwind_Exception *);
void _Unwind_Resume(_Unwind_Exception *);
_Unwind_Reason_Code _Unwind_Resume_or_Rethrow(_Unwind_Exception *);
#endif
_Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *);
/* setjmp(3)/longjmp(3) stuff */
typedef struct SjLj_Function_Context *_Unwind_FunctionContext_t;
void _Unwind_SjLj_Register(_Unwind_FunctionContext_t);
void _Unwind_SjLj_Unregister(_Unwind_FunctionContext_t);
_Unwind_Reason_Code _Unwind_SjLj_RaiseException(_Unwind_Exception *);
_Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind(_Unwind_Exception *,
_Unwind_Stop_Fn, void *);
void _Unwind_SjLj_Resume(_Unwind_Exception *);
_Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow(_Unwind_Exception *);
void *_Unwind_FindEnclosingFunction(void *);
#ifdef __APPLE__
_Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *)
__attribute__((__unavailable__));
_Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *)
__attribute__((__unavailable__));
/* Darwin-specific functions */
void __register_frame(const void *);
void __deregister_frame(const void *);
struct dwarf_eh_bases {
uintptr_t tbase;
uintptr_t dbase;
uintptr_t func;
};
void *_Unwind_Find_FDE(const void *, struct dwarf_eh_bases *);
void __register_frame_info_bases(const void *, void *, void *, void *)
__attribute__((__unavailable__));
void __register_frame_info(const void *, void *) __attribute__((__unavailable__));
void __register_frame_info_table_bases(const void *, void*, void *, void *)
__attribute__((__unavailable__));
void __register_frame_info_table(const void *, void *)
__attribute__((__unavailable__));
void __register_frame_table(const void *) __attribute__((__unavailable__));
void __deregister_frame_info(const void *) __attribute__((__unavailable__));
void __deregister_frame_info_bases(const void *)__attribute__((__unavailable__));
#else
_Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *);
_Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *);
#endif
#ifndef HIDE_EXPORTS
#pragma GCC visibility pop
#endif
#ifdef __cplusplus
}
#endif
#endif /* __CLANG_UNWIND_H */
#endif
|
