251 lines
8.0 KiB
C
251 lines
8.0 KiB
C
/* Header file for the ARM EABI and C6X unwinders
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Copyright (C) 2003-2019 Free Software Foundation, Inc.
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Contributed by Paul Brook
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* Language-independent unwinder header public defines. This contains both
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ABI defined objects, and GNU support routines. */
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#ifndef UNWIND_ARM_COMMON_H
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#define UNWIND_ARM_COMMON_H
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#define __ARM_EABI_UNWINDER__ 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef unsigned _Unwind_Word __attribute__((__mode__(__word__)));
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typedef signed _Unwind_Sword __attribute__((__mode__(__word__)));
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typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
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typedef unsigned _Unwind_Internal_Ptr __attribute__((__mode__(__pointer__)));
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typedef _Unwind_Word _uw;
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typedef unsigned _uw64 __attribute__((mode(__DI__)));
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typedef unsigned _uw16 __attribute__((mode(__HI__)));
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typedef unsigned _uw8 __attribute__((mode(__QI__)));
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typedef enum
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{
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_URC_OK = 0, /* operation completed successfully */
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_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
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_URC_END_OF_STACK = 5,
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_URC_HANDLER_FOUND = 6,
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_URC_INSTALL_CONTEXT = 7,
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_URC_CONTINUE_UNWIND = 8,
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_URC_FAILURE = 9 /* unspecified failure of some kind */
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}
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_Unwind_Reason_Code;
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typedef enum
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{
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_US_VIRTUAL_UNWIND_FRAME = 0,
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_US_UNWIND_FRAME_STARTING = 1,
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_US_UNWIND_FRAME_RESUME = 2,
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_US_ACTION_MASK = 3,
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_US_FORCE_UNWIND = 8,
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_US_END_OF_STACK = 16
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}
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_Unwind_State;
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/* Provided only for compatibility with existing code. */
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typedef int _Unwind_Action;
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#define _UA_SEARCH_PHASE 1
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#define _UA_CLEANUP_PHASE 2
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#define _UA_HANDLER_FRAME 4
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#define _UA_FORCE_UNWIND 8
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#define _UA_END_OF_STACK 16
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#define _URC_NO_REASON _URC_OK
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typedef struct _Unwind_Control_Block _Unwind_Control_Block;
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typedef struct _Unwind_Context _Unwind_Context;
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typedef _uw _Unwind_EHT_Header;
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/* UCB: */
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struct _Unwind_Control_Block
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{
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char exception_class[8];
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void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
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/* Unwinder cache, private fields for the unwinder's use */
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struct
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{
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_uw reserved1; /* Forced unwind stop fn, 0 if not forced */
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_uw reserved2; /* Personality routine address */
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_uw reserved3; /* Saved callsite address */
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_uw reserved4; /* Forced unwind stop arg */
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_uw reserved5;
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}
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unwinder_cache;
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/* Propagation barrier cache (valid after phase 1): */
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struct
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{
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_uw sp;
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_uw bitpattern[5];
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}
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barrier_cache;
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/* Cleanup cache (preserved over cleanup): */
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struct
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{
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_uw bitpattern[4];
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}
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cleanup_cache;
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/* Pr cache (for pr's benefit): */
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struct
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{
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_uw fnstart; /* function start address */
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_Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
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_uw additional; /* additional data */
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_uw reserved1;
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}
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pr_cache;
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long long int :0; /* Force alignment to 8-byte boundary */
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};
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/* Virtual Register Set*/
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typedef enum
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{
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_UVRSC_CORE = 0, /* integer register */
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_UVRSC_VFP = 1, /* vfp */
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_UVRSC_FPA = 2, /* fpa */
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_UVRSC_WMMXD = 3, /* Intel WMMX data register */
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_UVRSC_WMMXC = 4 /* Intel WMMX control register */
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}
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_Unwind_VRS_RegClass;
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typedef enum
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{
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_UVRSD_UINT32 = 0,
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_UVRSD_VFPX = 1,
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_UVRSD_FPAX = 2,
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_UVRSD_UINT64 = 3,
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_UVRSD_FLOAT = 4,
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_UVRSD_DOUBLE = 5
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}
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_Unwind_VRS_DataRepresentation;
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typedef enum
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{
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_UVRSR_OK = 0,
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_UVRSR_NOT_IMPLEMENTED = 1,
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_UVRSR_FAILED = 2
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}
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_Unwind_VRS_Result;
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/* Frame unwinding state. */
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typedef struct
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{
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/* The current word (bytes packed msb first). */
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_uw data;
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/* Pointer to the next word of data. */
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_uw *next;
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/* The number of bytes left in this word. */
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_uw8 bytes_left;
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/* The number of words pointed to by ptr. */
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_uw8 words_left;
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}
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__gnu_unwind_state;
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typedef _Unwind_Reason_Code (*personality_routine) (_Unwind_State,
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_Unwind_Control_Block *, _Unwind_Context *);
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_Unwind_VRS_Result _Unwind_VRS_Set(_Unwind_Context *, _Unwind_VRS_RegClass,
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_uw, _Unwind_VRS_DataRepresentation,
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void *);
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_Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context *, _Unwind_VRS_RegClass,
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_uw, _Unwind_VRS_DataRepresentation,
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void *);
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_Unwind_VRS_Result _Unwind_VRS_Pop(_Unwind_Context *, _Unwind_VRS_RegClass,
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_uw, _Unwind_VRS_DataRepresentation);
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/* Support functions for the PR. */
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#define _Unwind_Exception _Unwind_Control_Block
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typedef char _Unwind_Exception_Class[8];
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void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
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_Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
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_Unwind_Ptr _Unwind_GetDataRelBase (_Unwind_Context *);
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/* This should never be used. */
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_Unwind_Ptr _Unwind_GetTextRelBase (_Unwind_Context *);
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/* Interface functions: */
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_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block *ucbp);
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void __attribute__((noreturn)) _Unwind_Resume(_Unwind_Control_Block *ucbp);
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_Unwind_Reason_Code _Unwind_Resume_or_Rethrow (_Unwind_Control_Block *ucbp);
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typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
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(int, _Unwind_Action, _Unwind_Exception_Class,
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_Unwind_Control_Block *, struct _Unwind_Context *, void *);
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_Unwind_Reason_Code _Unwind_ForcedUnwind (_Unwind_Control_Block *,
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_Unwind_Stop_Fn, void *);
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/* @@@ Use unwind data to perform a stack backtrace. The trace callback
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is called for every stack frame in the call chain, but no cleanup
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actions are performed. */
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typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn) (_Unwind_Context *, void *);
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_Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn,
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void*);
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_Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
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void _Unwind_Complete(_Unwind_Control_Block *ucbp);
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void _Unwind_DeleteException (_Unwind_Exception *);
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_Unwind_Reason_Code __gnu_unwind_frame (_Unwind_Control_Block *,
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_Unwind_Context *);
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_Unwind_Reason_Code __gnu_unwind_execute (_Unwind_Context *,
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__gnu_unwind_state *);
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static inline _Unwind_Word
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_Unwind_GetGR (_Unwind_Context *context, int regno)
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{
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_uw val;
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_Unwind_VRS_Get (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
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return val;
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}
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#define _Unwind_GetIPInfo(context, ip_before_insn) \
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(*ip_before_insn = 0, _Unwind_GetIP (context))
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static inline void
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_Unwind_SetGR (_Unwind_Context *context, int regno, _Unwind_Word val)
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{
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_Unwind_VRS_Set (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
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}
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_Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
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void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
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/* leb128 type numbers have a potentially unlimited size.
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The target of the following definitions of _sleb128_t and _uleb128_t
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is to have efficient data types large enough to hold the leb128 type
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numbers used in the unwind code. */
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typedef long _sleb128_t;
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typedef unsigned long _uleb128_t;
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* defined UNWIND_ARM_COMMON_H */
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