1 /*===---- unwind.h - Stack unwinding ----------------------------------------=== 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to deal 5 * in the Software without restriction, including without limitation the rights 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 * copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 * THE SOFTWARE. 20 * 21 *===-----------------------------------------------------------------------=== 22 */ 23 24 /* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/ 25 26 #if __has_include_next(<unwind.h>) 27 /* Darwin and libunwind provide an unwind.h. If that's available, use 28 * it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE, 29 * so define that around the include.*/ 30 # ifndef _GNU_SOURCE 31 # define _SHOULD_UNDEFINE_GNU_SOURCE 32 # define _GNU_SOURCE 33 # endif 34 // libunwind's unwind.h reflects the current visibility. However, Mozilla 35 // builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the 36 // visibility to default and export its contents. gcc also allows users to 37 // override its override by #defining HIDE_EXPORTS (but note, this only obeys 38 // the user's -fvisibility setting; it doesn't hide any exports on its own). We 39 // imitate gcc's header here: 40 # ifdef HIDE_EXPORTS 41 # include_next <unwind.h> 42 # else 43 # pragma GCC visibility push(default) 44 # include_next <unwind.h> 45 # pragma GCC visibility pop 46 # endif 47 # ifdef _SHOULD_UNDEFINE_GNU_SOURCE 48 # undef _GNU_SOURCE 49 # undef _SHOULD_UNDEFINE_GNU_SOURCE 50 # endif 51 #else 52 53 #include <stdint.h> 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 /* It is a bit strange for a header to play with the visibility of the 60 symbols it declares, but this matches gcc's behavior and some programs 61 depend on it */ 62 #pragma GCC visibility push(default) 63 64 struct _Unwind_Context; 65 typedef enum { 66 _URC_NO_REASON = 0, 67 _URC_FOREIGN_EXCEPTION_CAUGHT = 1, 68 69 _URC_FATAL_PHASE2_ERROR = 2, 70 _URC_FATAL_PHASE1_ERROR = 3, 71 _URC_NORMAL_STOP = 4, 72 73 _URC_END_OF_STACK = 5, 74 _URC_HANDLER_FOUND = 6, 75 _URC_INSTALL_CONTEXT = 7, 76 _URC_CONTINUE_UNWIND = 8 77 } _Unwind_Reason_Code; 78 79 80 #ifdef __arm__ 81 82 typedef enum { 83 _UVRSC_CORE = 0, /* integer register */ 84 _UVRSC_VFP = 1, /* vfp */ 85 _UVRSC_WMMXD = 3, /* Intel WMMX data register */ 86 _UVRSC_WMMXC = 4 /* Intel WMMX control register */ 87 } _Unwind_VRS_RegClass; 88 89 typedef enum { 90 _UVRSD_UINT32 = 0, 91 _UVRSD_VFPX = 1, 92 _UVRSD_UINT64 = 3, 93 _UVRSD_FLOAT = 4, 94 _UVRSD_DOUBLE = 5 95 } _Unwind_VRS_DataRepresentation; 96 97 typedef enum { 98 _UVRSR_OK = 0, 99 _UVRSR_NOT_IMPLEMENTED = 1, 100 _UVRSR_FAILED = 2 101 } _Unwind_VRS_Result; 102 103 _Unwind_VRS_Result _Unwind_VRS_Get(_Unwind_Context *context, 104 _Unwind_VRS_RegClass regclass, 105 uint32_t regno, 106 _Unwind_VRS_DataRepresentation representation, 107 void *valuep); 108 109 #else 110 111 uintptr_t _Unwind_GetIP(struct _Unwind_Context* context); 112 113 #endif 114 115 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context*, void*); 116 _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void*); 117 118 #pragma GCC visibility pop 119 120 #ifdef __cplusplus 121 } 122 #endif 123 124 #endif 125