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| /*===---- unwind.h - Stack unwinding ----------------------------------------===
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*===-----------------------------------------------------------------------===
*/
/* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
#ifndef __CLANG_UNWIND_H
#define __CLANG_UNWIND_H
#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
#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;
typedef intptr_t _Unwind_Sword;
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;
struct _Unwind_Exception;
typedef enum {
_URC_NO_REASON = 0,
#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
!defined(__ARM_DWARF_EH__)
_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__)
_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,
struct _Unwind_Exception *);
struct _Unwind_Exception {
_Unwind_Exception_Class exception_class;
_Unwind_Exception_Cleanup_Fn exception_cleanup;
_Unwind_Word private_1;
_Unwind_Word private_2;
/* 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__));
typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)(int, _Unwind_Action,
_Unwind_Exception_Class,
struct _Unwind_Exception *,
struct _Unwind_Context *,
void *);
typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(
int, _Unwind_Action, _Unwind_Exception_Class, struct _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(__APPLE__)
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 */
} _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;
#if !defined(__USING_SJLJ_EXCEPTIONS__) && !defined(__ARM_DWARF_EH__)
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)
#endif
_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(struct _Unwind_Exception *);
_Unwind_Reason_Code _Unwind_ForcedUnwind(struct _Unwind_Exception *,
_Unwind_Stop_Fn, void *);
void _Unwind_DeleteException(struct _Unwind_Exception *);
void _Unwind_Resume(struct _Unwind_Exception *);
_Unwind_Reason_Code _Unwind_Resume_or_Rethrow(struct _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(struct _Unwind_Exception *);
_Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind(struct _Unwind_Exception *,
_Unwind_Stop_Fn, void *);
void _Unwind_SjLj_Resume(struct _Unwind_Exception *);
_Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow(struct _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
#endif /* __CLANG_UNWIND_H */ |