sys/arch/arm/include/ehabi.h

   1 /*-
   2  * Copyright (c) 2013 The NetBSD Foundation, Inc.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to The NetBSD Foundation
   6  * by Matt Thomas of 3am Software Foundry.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29 /* $NetBSD: ehabi.h,v 1.1 2013/08/12 23:22:12 matt Exp $ */
  30
  31 #ifndef _ARM_EHABI_H_
  32 #define _ARM_EHABI_H_
  33
  34 #if defined(_KERNEL) || defined(_STANDALONE)
  35 #include <sys/types.h>
  36 #else
  37 #include <inttypes.h>
  38 #endif
  39
  40 typedef enum {
  41         _URC_OK = 0,                    /* operation complete */
  42         _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
  43         _URC_HANDLER_FOUND = 6,
  44         _URC_INSTALL_CONTEXT = 7,
  45         _URC_CONTINUE_UNWIND = 8,
  46         _URC_FAILURE = 9,               /* unspecified failure */
  47 } _Unwind_Reason_Code;
  48
  49 typedef enum {
  50         _UVRSC_CORE = 0,        /* integer register */
  51         _UVRSC_VFP = 1,         /* vfp */
  52         _UVRSC_WMMXD = 3,       /* Intel WMMX data register */
  53         _UVRSC_WMMXC = 4        /* Intel WMMX control register */
  54 } _Unwind_VRS_RegClass;
  55 typedef enum {
  56         _UVRSD_UINT32 = 0,
  57         _UVRSD_VFPX = 1,
  58         _UVRSD_UINT64 = 3,
  59         _UVRSD_FLOAT = 4,
  60         _UVRSD_DOUBLE = 5
  61 } _Unwind_VRS_DataRepresentation;
  62 typedef enum {
  63         _UVRSR_OK = 0,
  64         _UVRSR_NOT_IMPLEMENTED = 1,
  65         _UVRSR_FAILED = 2
  66 } _Unwind_VRS_Result;
  67
  68 typedef uint32_t _Unwind_State;
  69 static const _Unwind_State _US_VIRTUAL_UNWIND_FRAME  = 0;
  70 static const _Unwind_State _US_UNWIND_FRAME_STARTING = 1;
  71 static const _Unwind_State _US_UNWIND_FRAME_RESUME   = 2;
  72
  73 typedef struct _Unwind_Control_Block _Unwind_Control_Block;
  74 typedef struct _Unwind_Context _Unwind_Context;
  75 typedef uint32_t _Unwind_EHT_Header;
  76
  77 struct _Unwind_Control_Block {
  78         char exception_class[8];
  79         void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
  80         /* Unwinder cache, private fields for the unwinder's use */
  81         struct {
  82                 uint32_t reserved1;
  83                 uint32_t reserved2;
  84                 uint32_t reserved3;
  85                 uint32_t reserved4;
  86                 uint32_t reserved5;
  87                 /* init reserved1 to 0, then don't touch */
  88         } unwinder_cache;
  89         /* Propagation barrier cache (valid after phase 1): */
  90         struct {
  91                 uint32_t sp;
  92                   uint32_t bitpattern[5];
  93         } barrier_cache;
  94         /* Cleanup cache (preserved over cleanup): */
  95         struct {
  96                 uint32_t bitpattern[4];
  97         } cleanup_cache;
  98         /* Pr cache (for pr's benefit): */
  99         struct {
 100                 uint32_t fnstart;               /* function start address */
 101                 _Unwind_EHT_Header *ehtp; /* ptr to EHT entry header word */
 102                 uint32_t additional;            /* additional data */
 103                 uint32_t reserved1;
 104         } pr_cache;
 105         uint64_t : 0; /* Force alignment of next item to 8-byte boundary */
 106 };
 107
 108 __BEGIN_DECLS
 109
 110 /* Unwinding functions */
 111 void                    _Unwind_Resume(_Unwind_Control_Block *);
 112 void                    _Unwind_Complete(_Unwind_Control_Block *);
 113 void                    _Unwind_DeleteException(_Unwind_Control_Block *);
 114 _Unwind_Reason_Code     _Unwind_RaiseException(_Unwind_Control_Block *);
 115
 116 _Unwind_VRS_Result      _Unwind_VRS_Set(_Unwind_Context *, _Unwind_VRS_RegClass,
 117                             uint32_t, _Unwind_VRS_DataRepresentation, void *);
 118 _Unwind_VRS_Result      _Unwind_VRS_Get(_Unwind_Context *, _Unwind_VRS_RegClass,
 119                             uint32_t, _Unwind_VRS_DataRepresentation, void *);
 120
 121 _Unwind_VRS_Result      _Unwind_VRS_Pop(_Unwind_Context *, _Unwind_VRS_RegClass,
 122                             uint32_t, _Unwind_VRS_DataRepresentation);
 123
 124 _Unwind_Reason_Code     __aeabi_unwind_cpp_pr0(_Unwind_State,
 125                             _Unwind_Control_Block *, _Unwind_Context *);
 126 _Unwind_Reason_Code     __aeabi_unwind_cpp_pr1(_Unwind_State ,
 127                             _Unwind_Control_Block *, _Unwind_Context *);
 128 _Unwind_Reason_Code     __aeabi_unwind_cpp_pr2(_Unwind_State ,
 129                             _Unwind_Control_Block *, _Unwind_Context *);
 130
 131 __END_DECLS
 132
 133 #endif /* _ARM_EHABI_H_ */