Ben Cheng | d9735fc | 2013-08-22 22:10:54 -0700 | [diff] [blame] | 1 | /* Header file for the ARM EABI unwinder |
| 2 | Copyright (C) 2003-2013 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 */ |