1 /* Header file for the ARM EABI unwinder 2 Copyright (C) 2003-2014 Free Software Foundation, Inc. 3 Contributed by Paul Brook 4 5 This file is free software; you can redistribute it and/or modify it 6 under the terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 3, or (at your option) any 8 later version. 9 10 This file is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 General Public License for more details. 14 15 Under Section 7 of GPL version 3, you are granted additional 16 permissions described in the GCC Runtime Library Exception, version 17 3.1, as published by the Free Software Foundation. 18 19 You should have received a copy of the GNU General Public License and 20 a copy of the GCC Runtime Library Exception along with this program; 21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 22 <http://www.gnu.org/licenses/>. */ 23 24 /* Language-independent unwinder header public defines. This contains both 25 ABI defined objects, and GNU support routines. */ 26 27 #ifndef UNWIND_ARM_H 28 #define UNWIND_ARM_H 29 30 #include "unwind-arm-common.h" 31 32 #define UNWIND_STACK_REG 13 33 /* Use IP as a scratch register within the personality routine. */ 34 #define UNWIND_POINTER_REG 12 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 /* Decode an R_ARM_TARGET2 relocation. */ 40 static inline _Unwind_Word 41 _Unwind_decode_typeinfo_ptr (_Unwind_Word base __attribute__ ((unused)), 42 _Unwind_Word ptr) 43 { 44 _Unwind_Word tmp; 45 46 tmp = *(_Unwind_Word *) ptr; 47 /* Zero values are always NULL. */ 48 if (!tmp) 49 return 0; 50 51 #if (defined(linux) && !defined(__uClinux__)) || defined(__NetBSD__) 52 /* Pc-relative indirect. */ 53 #define _GLIBCXX_OVERRIDE_TTYPE_ENCODING (DW_EH_PE_pcrel | DW_EH_PE_indirect) 54 tmp += ptr; 55 tmp = *(_Unwind_Word *) tmp; 56 #elif defined(__symbian__) || defined(__uClinux__) 57 #define _GLIBCXX_OVERRIDE_TTYPE_ENCODING (DW_EH_PE_absptr) 58 /* Absolute pointer. Nothing more to do. */ 59 #else 60 #define _GLIBCXX_OVERRIDE_TTYPE_ENCODING (DW_EH_PE_pcrel) 61 /* Pc-relative pointer. */ 62 tmp += ptr; 63 #endif 64 return tmp; 65 } 66 67 static inline _Unwind_Reason_Code 68 __gnu_unwind_24bit (_Unwind_Context * context __attribute__ ((unused)), 69 _uw data __attribute__ ((unused)), 70 int compact __attribute__ ((unused))) 71 { 72 return _URC_FAILURE; 73 } 74 /* Return the address of the instruction, not the actual IP value. */ 75 #define _Unwind_GetIP(context) \ 76 (_Unwind_GetGR (context, 15) & ~(_Unwind_Word)1) 77 78 #define _Unwind_SetIP(context, val) \ 79 _Unwind_SetGR (context, 15, val | (_Unwind_GetGR (context, 15) & 1)) 80 81 #ifdef __cplusplus 82 } /* extern "C" */ 83 #endif 84 85 #endif /* defined UNWIND_ARM_H */ 86
