llvm-gcc-4.0/gcc/config/arm/unwind-arm.h - llvm-archive - Git at Google

 /* Header file for the ARM EABI unwinder
    Copyright (C) 2003, 2004  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, 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */

 /* Language-independent unwinder header public defines.  This contins 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
   /* We add a prototype for abort here to avoid creating a dependency on
      target headers.  */
   extern void abort();

   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_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
     }
   _Unwind_State;

   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;	/* init reserved1 to 0, then don't touch */
 	  _uw reserved2;
 	  _uw reserved3;
 	  _uw reserved4;
 	  _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 */
     };

   /* Interface functions: */
   _Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block *ucbp);
   void __attribute__((noreturn)) _Unwind_Resume(_Unwind_Control_Block *ucbp);
   void _Unwind_Complete(_Unwind_Control_Block *ucbp);

   /* 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 */
   static inline _Unwind_Ptr
   _Unwind_GetDataRelBase (_Unwind_Context * context __attribute__ ((unused)))
     {
       abort ();
     }

   static inline _Unwind_Ptr
   _Unwind_GetTextRelBase (_Unwind_Context * context __attribute__ ((unused)))
     {
       abort ();
     }

   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__)
       /* Absoute 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)

   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 callsite.  */
 #define _Unwind_SetIP(context, val) \
   _Unwind_SetGR (context, 15, val | (_Unwind_GetGR (context, 15) & 1))

   /* 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

 #ifdef __cplusplus
 }   /* extern "C" */
 #endif

 #endif /* defined UNWIND_ARM_H */
	/* Header file for the ARM EABI unwinder
	Copyright (C) 2003, 2004 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, 59 Temple Place - Suite 330,
	Boston, MA 02111-1307, USA. */

	/* Language-independent unwinder header public defines. This contins 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
	/* We add a prototype for abort here to avoid creating a dependency on
	target headers. */
	extern void abort();

	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_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
	}
	_Unwind_State;

	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; /* init reserved1 to 0, then don't touch */
	_uw reserved2;
	_uw reserved3;
	_uw reserved4;
	_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 */
	};

	/* Interface functions: */
	_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Control_Block *ucbp);
	void __attribute__((noreturn)) _Unwind_Resume(_Unwind_Control_Block *ucbp);
	void _Unwind_Complete(_Unwind_Control_Block *ucbp);

	/* 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 */
	static inline _Unwind_Ptr
	_Unwind_GetDataRelBase (_Unwind_Context * context __attribute__ ((unused)))
	{
	abort ();
	}

	static inline _Unwind_Ptr
	_Unwind_GetTextRelBase (_Unwind_Context * context __attribute__ ((unused)))
	{
	abort ();
	}

	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__)
	/* Absoute 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)

	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 callsite. */
	#define _Unwind_SetIP(context, val) \
	_Unwind_SetGR (context, 15, val \| (_Unwind_GetGR (context, 15) & 1))

	/* 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

	#ifdef __cplusplus
	} /* extern "C" */
	#endif

	#endif /* defined UNWIND_ARM_H */