272 lines
8.5 KiB
C
272 lines
8.5 KiB
C
/* Header file for the ARM EABI unwinder
|
|
Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
|
|
Contributed by Paul Brook
|
|
|
|
This file is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the
|
|
Free Software Foundation; either version 2, or (at your option) any
|
|
later version.
|
|
|
|
In addition to the permissions in the GNU General Public License, the
|
|
Free Software Foundation gives you unlimited permission to link the
|
|
compiled version of this file into combinations with other programs,
|
|
and to distribute those combinations without any restriction coming
|
|
from the use of this file. (The General Public License restrictions
|
|
do apply in other respects; for example, they cover modification of
|
|
the file, and distribution when not linked into a combine
|
|
executable.)
|
|
|
|
This file is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/* Language-independent unwinder header public defines. This contains both
|
|
ABI defined objects, and GNU support routines. */
|
|
|
|
#ifndef UNWIND_ARM_H
|
|
#define UNWIND_ARM_H
|
|
|
|
#define __ARM_EABI_UNWINDER__ 1
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
|
|
typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
|
|
typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
|
|
typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__)));
|
|
typedef _Unwind_Word _uw;
|
|
typedef unsigned _uw64 __attribute__((mode(__DI__)));
|
|
typedef unsigned _uw16 __attribute__((mode(__HI__)));
|
|
typedef unsigned _uw8 __attribute__((mode(__QI__)));
|
|
|
|
typedef enum
|
|
{
|
|
_URC_OK = 0, /* operation completed successfully */
|
|
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
|
|
_URC_END_OF_STACK = 5,
|
|
_URC_HANDLER_FOUND = 6,
|
|
_URC_INSTALL_CONTEXT = 7,
|
|
_URC_CONTINUE_UNWIND = 8,
|
|
_URC_FAILURE = 9 /* unspecified failure of some kind */
|
|
}
|
|
_Unwind_Reason_Code;
|
|
|
|
typedef enum
|
|
{
|
|
_US_VIRTUAL_UNWIND_FRAME = 0,
|
|
_US_UNWIND_FRAME_STARTING = 1,
|
|
_US_UNWIND_FRAME_RESUME = 2,
|
|
_US_ACTION_MASK = 3,
|
|
_US_FORCE_UNWIND = 8,
|
|
_US_END_OF_STACK = 16
|
|
}
|
|
_Unwind_State;
|
|
|
|
/* Provided only for for compatibility with existing code. */
|
|
typedef int _Unwind_Action;
|
|
#define _UA_SEARCH_PHASE 1
|
|
#define _UA_CLEANUP_PHASE 2
|
|
#define _UA_HANDLER_FRAME 4
|
|
#define _UA_FORCE_UNWIND 8
|
|
#define _UA_END_OF_STACK 16
|
|
#define _URC_NO_REASON _URC_OK
|
|
|
|
typedef struct _Unwind_Control_Block _Unwind_Control_Block;
|
|
typedef struct _Unwind_Context _Unwind_Context;
|
|
typedef _uw _Unwind_EHT_Header;
|
|
|
|
|
|
/* UCB: */
|
|
|
|
struct _Unwind_Control_Block
|
|
{
|
|
char exception_class[8];
|
|
void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
|
|
/* Unwinder cache, private fields for the unwinder's use */
|
|
struct
|
|
{
|
|
_uw reserved1; /* Forced unwind stop fn, 0 if not forced */
|
|
_uw reserved2; /* Personality routine address */
|
|
_uw reserved3; /* Saved callsite address */
|
|
_uw reserved4; /* Forced unwind stop arg */
|
|
_uw reserved5;
|
|
}
|
|
unwinder_cache;
|
|
/* Propagation barrier cache (valid after phase 1): */
|
|
struct
|
|
{
|
|
_uw sp;
|
|
_uw bitpattern[5];
|
|
}
|
|
barrier_cache;
|
|
/* Cleanup cache (preserved over cleanup): */
|
|
struct
|
|
{
|
|
_uw bitpattern[4];
|
|
}
|
|
cleanup_cache;
|
|
/* Pr cache (for pr's benefit): */
|
|
struct
|
|
{
|
|
_uw fnstart; /* function start address */
|
|
_Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
|
|
_uw additional; /* additional data */
|
|
_uw reserved1;
|
|
}
|
|
pr_cache;
|
|
long long int :0; /* Force alignment to 8-byte boundary */
|
|
};
|
|
|
|
/* Virtual Register Set*/
|
|
|
|
typedef enum
|
|
{
|
|
_UVRSC_CORE = 0, /* integer register */
|
|
_UVRSC_VFP = 1, /* vfp */
|
|
_UVRSC_FPA = 2, /* fpa */
|
|
_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_FPAX = 2,
|
|
_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;
|
|
|
|
/* Frame unwinding state. */
|
|
typedef struct
|
|
{
|
|
/* The current word (bytes packed msb first). */
|
|
_uw data;
|
|
/* Pointer to the next word of data. */
|
|
_uw *next;
|
|
/* The number of bytes left in this word. */
|
|
_uw8 bytes_left;
|
|
/* The number of words pointed to by ptr. */
|
|
_uw8 words_left;
|
|
}
|
|
__gnu_unwind_state;
|
|
|
|
typedef _Unwind_Reason_Code (*personality_routine) (_Unwind_State,
|
|
_Unwind_Control_Block *, _Unwind_Context *);
|
|
|
|
_Unwind_VRS_Result _Unwind_VRS_Set(_Unwind_Context *, _Unwind_VRS_RegClass,
|
|
_uw, _Unwind_VRS_DataRepresentation,
|
|
void *);
|
|
|
|
_Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context *, _Unwind_VRS_RegClass,
|
|
_uw, _Unwind_VRS_DataRepresentation,
|
|
void *);
|
|
|
|
_Unwind_VRS_Result _Unwind_VRS_Pop(_Unwind_Context *, _Unwind_VRS_RegClass,
|
|
_uw, _Unwind_VRS_DataRepresentation);
|
|
|
|
|
|
/* Support functions for the PR. */
|
|
#define _Unwind_Exception _Unwind_Control_Block
|
|
typedef char _Unwind_Exception_Class[8];
|
|
|
|
void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
|
|
_Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
|
|
|
|
/* These two should never be used. */
|
|
_Unwind_Ptr _Unwind_GetDataRelBase (_Unwind_Context *);
|
|
_Unwind_Ptr _Unwind_GetTextRelBase (_Unwind_Context *);
|
|
|
|
/* Interface functions: */
|
|
_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block *ucbp);
|
|
void __attribute__((noreturn)) _Unwind_Resume(_Unwind_Control_Block *ucbp);
|
|
_Unwind_Reason_Code _Unwind_Resume_or_Rethrow (_Unwind_Control_Block *ucbp);
|
|
|
|
typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
|
|
(int, _Unwind_Action, _Unwind_Exception_Class,
|
|
_Unwind_Control_Block *, struct _Unwind_Context *, void *);
|
|
_Unwind_Reason_Code _Unwind_ForcedUnwind (_Unwind_Control_Block *,
|
|
_Unwind_Stop_Fn, void *);
|
|
_Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
|
|
void _Unwind_Complete(_Unwind_Control_Block *ucbp);
|
|
void _Unwind_DeleteException (_Unwind_Exception *);
|
|
|
|
_Unwind_Reason_Code __gnu_unwind_frame (_Unwind_Control_Block *,
|
|
_Unwind_Context *);
|
|
_Unwind_Reason_Code __gnu_unwind_execute (_Unwind_Context *,
|
|
__gnu_unwind_state *);
|
|
|
|
/* Decode an R_ARM_TARGET2 relocation. */
|
|
static inline _Unwind_Word
|
|
_Unwind_decode_target2 (_Unwind_Word ptr)
|
|
{
|
|
_Unwind_Word tmp;
|
|
|
|
tmp = *(_Unwind_Word *) ptr;
|
|
/* Zero values are always NULL. */
|
|
if (!tmp)
|
|
return 0;
|
|
|
|
#if defined(linux) || defined(__NetBSD__)
|
|
/* Pc-relative indirect. */
|
|
tmp += ptr;
|
|
tmp = *(_Unwind_Word *) tmp;
|
|
#elif defined(__symbian__)
|
|
/* Absolute pointer. Nothing more to do. */
|
|
#else
|
|
/* Pc-relative pointer. */
|
|
tmp += ptr;
|
|
#endif
|
|
return tmp;
|
|
}
|
|
|
|
static inline _Unwind_Word
|
|
_Unwind_GetGR (_Unwind_Context *context, int regno)
|
|
{
|
|
_uw val;
|
|
_Unwind_VRS_Get (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
|
|
return val;
|
|
}
|
|
|
|
/* Return the address of the instruction, not the actual IP value. */
|
|
#define _Unwind_GetIP(context) \
|
|
(_Unwind_GetGR (context, 15) & ~(_Unwind_Word)1)
|
|
|
|
#define _Unwind_GetIPInfo(context, ip_before_insn) \
|
|
(*ip_before_insn = 0, _Unwind_GetGR (context, 15) & ~(_Unwind_Word)1)
|
|
|
|
static inline void
|
|
_Unwind_SetGR (_Unwind_Context *context, int regno, _Unwind_Word val)
|
|
{
|
|
_Unwind_VRS_Set (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
|
|
}
|
|
|
|
/* The dwarf unwinder doesn't understand arm/thumb state. We assume the
|
|
landing pad uses the same instruction set as the call site. */
|
|
#define _Unwind_SetIP(context, val) \
|
|
_Unwind_SetGR (context, 15, val | (_Unwind_GetGR (context, 15) & 1))
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* defined UNWIND_ARM_H */
|