Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

Rev

Blame | Last modification | View Log | Download | RSS feed

  1. /*===---- unwind.h - Stack unwinding ----------------------------------------===
  2.  *
  3.  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4.  * See https://llvm.org/LICENSE.txt for license information.
  5.  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6.  *
  7.  *===-----------------------------------------------------------------------===
  8.  */
  9.  
  10. /* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
  11.  
  12. #ifndef __CLANG_UNWIND_H
  13. #define __CLANG_UNWIND_H
  14.  
  15. #if defined(__APPLE__) && __has_include_next(<unwind.h>)
  16. /* Darwin (from 11.x on) provide an unwind.h. If that's available,
  17.  * use it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE,
  18.  * so define that around the include.*/
  19. # ifndef _GNU_SOURCE
  20. #  define _SHOULD_UNDEFINE_GNU_SOURCE
  21. #  define _GNU_SOURCE
  22. # endif
  23. // libunwind's unwind.h reflects the current visibility.  However, Mozilla
  24. // builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the
  25. // visibility to default and export its contents.  gcc also allows users to
  26. // override its override by #defining HIDE_EXPORTS (but note, this only obeys
  27. // the user's -fvisibility setting; it doesn't hide any exports on its own).  We
  28. // imitate gcc's header here:
  29. # ifdef HIDE_EXPORTS
  30. #  include_next <unwind.h>
  31. # else
  32. #  pragma GCC visibility push(default)
  33. #  include_next <unwind.h>
  34. #  pragma GCC visibility pop
  35. # endif
  36. # ifdef _SHOULD_UNDEFINE_GNU_SOURCE
  37. #  undef _GNU_SOURCE
  38. #  undef _SHOULD_UNDEFINE_GNU_SOURCE
  39. # endif
  40. #else
  41.  
  42. #include <stdint.h>
  43.  
  44. #ifdef __cplusplus
  45. extern "C" {
  46. #endif
  47.  
  48. /* It is a bit strange for a header to play with the visibility of the
  49.    symbols it declares, but this matches gcc's behavior and some programs
  50.    depend on it */
  51. #ifndef HIDE_EXPORTS
  52. #pragma GCC visibility push(default)
  53. #endif
  54.  
  55. typedef uintptr_t _Unwind_Word __attribute__((__mode__(__unwind_word__)));
  56. typedef intptr_t _Unwind_Sword __attribute__((__mode__(__unwind_word__)));
  57. typedef uintptr_t _Unwind_Ptr;
  58. typedef uintptr_t _Unwind_Internal_Ptr;
  59. typedef uint64_t _Unwind_Exception_Class;
  60.  
  61. typedef intptr_t _sleb128_t;
  62. typedef uintptr_t _uleb128_t;
  63.  
  64. struct _Unwind_Context;
  65. #if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
  66.                           defined(__ARM_DWARF_EH__) || defined(__SEH__))
  67. struct _Unwind_Control_Block;
  68. typedef struct _Unwind_Control_Block _Unwind_Control_Block;
  69. #define _Unwind_Exception _Unwind_Control_Block /* Alias */
  70. #else
  71. struct _Unwind_Exception;
  72. typedef struct _Unwind_Exception _Unwind_Exception;
  73. #endif
  74. typedef enum {
  75.   _URC_NO_REASON = 0,
  76. #if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
  77.     !defined(__ARM_DWARF_EH__) && !defined(__SEH__)
  78.   _URC_OK = 0, /* used by ARM EHABI */
  79. #endif
  80.   _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
  81.  
  82.   _URC_FATAL_PHASE2_ERROR = 2,
  83.   _URC_FATAL_PHASE1_ERROR = 3,
  84.   _URC_NORMAL_STOP = 4,
  85.  
  86.   _URC_END_OF_STACK = 5,
  87.   _URC_HANDLER_FOUND = 6,
  88.   _URC_INSTALL_CONTEXT = 7,
  89.   _URC_CONTINUE_UNWIND = 8,
  90. #if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
  91.     !defined(__ARM_DWARF_EH__) && !defined(__SEH__)
  92.   _URC_FAILURE = 9 /* used by ARM EHABI */
  93. #endif
  94. } _Unwind_Reason_Code;
  95.  
  96. typedef enum {
  97.   _UA_SEARCH_PHASE = 1,
  98.   _UA_CLEANUP_PHASE = 2,
  99.  
  100.   _UA_HANDLER_FRAME = 4,
  101.   _UA_FORCE_UNWIND = 8,
  102.   _UA_END_OF_STACK = 16 /* gcc extension to C++ ABI */
  103. } _Unwind_Action;
  104.  
  105. typedef void (*_Unwind_Exception_Cleanup_Fn)(_Unwind_Reason_Code,
  106.                                              _Unwind_Exception *);
  107.  
  108. #if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
  109.                           defined(__ARM_DWARF_EH__) || defined(__SEH__))
  110. typedef struct _Unwind_Control_Block _Unwind_Control_Block;
  111. typedef uint32_t _Unwind_EHT_Header;
  112.  
  113. struct _Unwind_Control_Block {
  114.   uint64_t exception_class;
  115.   void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
  116.   /* unwinder cache (private fields for the unwinder's use) */
  117.   struct {
  118.     uint32_t reserved1; /* forced unwind stop function, 0 if not forced */
  119.     uint32_t reserved2; /* personality routine */
  120.     uint32_t reserved3; /* callsite */
  121.     uint32_t reserved4; /* forced unwind stop argument */
  122.     uint32_t reserved5;
  123.   } unwinder_cache;
  124.   /* propagation barrier cache (valid after phase 1) */
  125.   struct {
  126.     uint32_t sp;
  127.     uint32_t bitpattern[5];
  128.   } barrier_cache;
  129.   /* cleanup cache (preserved over cleanup) */
  130.   struct {
  131.     uint32_t bitpattern[4];
  132.   } cleanup_cache;
  133.   /* personality cache (for personality's benefit) */
  134.   struct {
  135.     uint32_t fnstart;         /* function start address */
  136.     _Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
  137.     uint32_t additional;      /* additional data */
  138.     uint32_t reserved1;
  139.   } pr_cache;
  140.   long long int : 0; /* force alignment of next item to 8-byte boundary */
  141. } __attribute__((__aligned__(8)));
  142. #else
  143. struct _Unwind_Exception {
  144.   _Unwind_Exception_Class exception_class;
  145.   _Unwind_Exception_Cleanup_Fn exception_cleanup;
  146. #if !defined (__USING_SJLJ_EXCEPTIONS__) && defined (__SEH__)
  147.   _Unwind_Word private_[6];
  148. #else
  149.   _Unwind_Word private_1;
  150.   _Unwind_Word private_2;
  151. #endif
  152.   /* The Itanium ABI requires that _Unwind_Exception objects are "double-word
  153.    * aligned".  GCC has interpreted this to mean "use the maximum useful
  154.    * alignment for the target"; so do we. */
  155. } __attribute__((__aligned__));
  156. #endif
  157.  
  158. typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)(int, _Unwind_Action,
  159.                                                _Unwind_Exception_Class,
  160.                                                _Unwind_Exception *,
  161.                                                struct _Unwind_Context *,
  162.                                                void *);
  163.  
  164. typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(int, _Unwind_Action,
  165.                                                       _Unwind_Exception_Class,
  166.                                                       _Unwind_Exception *,
  167.                                                       struct _Unwind_Context *);
  168. typedef _Unwind_Personality_Fn __personality_routine;
  169.  
  170. typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context *,
  171.                                                 void *);
  172.  
  173. #if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) ||                \
  174.                           defined(__ARM_DWARF_EH__) || defined(__SEH__))
  175. typedef enum {
  176.   _UVRSC_CORE = 0,        /* integer register */
  177.   _UVRSC_VFP = 1,         /* vfp */
  178.   _UVRSC_WMMXD = 3,       /* Intel WMMX data register */
  179.   _UVRSC_WMMXC = 4,       /* Intel WMMX control register */
  180.   _UVRSC_PSEUDO = 5       /* Special purpose pseudo register */
  181. } _Unwind_VRS_RegClass;
  182.  
  183. typedef enum {
  184.   _UVRSD_UINT32 = 0,
  185.   _UVRSD_VFPX = 1,
  186.   _UVRSD_UINT64 = 3,
  187.   _UVRSD_FLOAT = 4,
  188.   _UVRSD_DOUBLE = 5
  189. } _Unwind_VRS_DataRepresentation;
  190.  
  191. typedef enum {
  192.   _UVRSR_OK = 0,
  193.   _UVRSR_NOT_IMPLEMENTED = 1,
  194.   _UVRSR_FAILED = 2
  195. } _Unwind_VRS_Result;
  196.  
  197. typedef uint32_t _Unwind_State;
  198. #define _US_VIRTUAL_UNWIND_FRAME  ((_Unwind_State)0)
  199. #define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1)
  200. #define _US_UNWIND_FRAME_RESUME   ((_Unwind_State)2)
  201. #define _US_ACTION_MASK           ((_Unwind_State)3)
  202. #define _US_FORCE_UNWIND          ((_Unwind_State)8)
  203.  
  204. _Unwind_VRS_Result _Unwind_VRS_Get(struct _Unwind_Context *__context,
  205.   _Unwind_VRS_RegClass __regclass,
  206.   uint32_t __regno,
  207.   _Unwind_VRS_DataRepresentation __representation,
  208.   void *__valuep);
  209.  
  210. _Unwind_VRS_Result _Unwind_VRS_Set(struct _Unwind_Context *__context,
  211.   _Unwind_VRS_RegClass __regclass,
  212.   uint32_t __regno,
  213.   _Unwind_VRS_DataRepresentation __representation,
  214.   void *__valuep);
  215.  
  216. static __inline__
  217. _Unwind_Word _Unwind_GetGR(struct _Unwind_Context *__context, int __index) {
  218.   _Unwind_Word __value;
  219.   _Unwind_VRS_Get(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value);
  220.   return __value;
  221. }
  222.  
  223. static __inline__
  224. void _Unwind_SetGR(struct _Unwind_Context *__context, int __index,
  225.                    _Unwind_Word __value) {
  226.   _Unwind_VRS_Set(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value);
  227. }
  228.  
  229. static __inline__
  230. _Unwind_Word _Unwind_GetIP(struct _Unwind_Context *__context) {
  231.   _Unwind_Word __ip = _Unwind_GetGR(__context, 15);
  232.   return __ip & ~(_Unwind_Word)(0x1); /* Remove thumb mode bit. */
  233. }
  234.  
  235. static __inline__
  236. void _Unwind_SetIP(struct _Unwind_Context *__context, _Unwind_Word __value) {
  237.   _Unwind_Word __thumb_mode_bit = _Unwind_GetGR(__context, 15) & 0x1;
  238.   _Unwind_SetGR(__context, 15, __value | __thumb_mode_bit);
  239. }
  240. #else
  241. _Unwind_Word _Unwind_GetGR(struct _Unwind_Context *, int);
  242. void _Unwind_SetGR(struct _Unwind_Context *, int, _Unwind_Word);
  243.  
  244. _Unwind_Word _Unwind_GetIP(struct _Unwind_Context *);
  245. void _Unwind_SetIP(struct _Unwind_Context *, _Unwind_Word);
  246. #endif
  247.  
  248.  
  249. _Unwind_Word _Unwind_GetIPInfo(struct _Unwind_Context *, int *);
  250.  
  251. _Unwind_Word _Unwind_GetCFA(struct _Unwind_Context *);
  252.  
  253. _Unwind_Word _Unwind_GetBSP(struct _Unwind_Context *);
  254.  
  255. void *_Unwind_GetLanguageSpecificData(struct _Unwind_Context *);
  256.  
  257. _Unwind_Ptr _Unwind_GetRegionStart(struct _Unwind_Context *);
  258.  
  259. /* DWARF EH functions; currently not available on Darwin/ARM */
  260. #if !defined(__APPLE__) || !defined(__arm__)
  261. _Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Exception *);
  262. _Unwind_Reason_Code _Unwind_ForcedUnwind(_Unwind_Exception *, _Unwind_Stop_Fn,
  263.                                          void *);
  264. void _Unwind_DeleteException(_Unwind_Exception *);
  265. void _Unwind_Resume(_Unwind_Exception *);
  266. _Unwind_Reason_Code _Unwind_Resume_or_Rethrow(_Unwind_Exception *);
  267.  
  268. #endif
  269.  
  270. _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *);
  271.  
  272. /* setjmp(3)/longjmp(3) stuff */
  273. typedef struct SjLj_Function_Context *_Unwind_FunctionContext_t;
  274.  
  275. void _Unwind_SjLj_Register(_Unwind_FunctionContext_t);
  276. void _Unwind_SjLj_Unregister(_Unwind_FunctionContext_t);
  277. _Unwind_Reason_Code _Unwind_SjLj_RaiseException(_Unwind_Exception *);
  278. _Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind(_Unwind_Exception *,
  279.                                               _Unwind_Stop_Fn, void *);
  280. void _Unwind_SjLj_Resume(_Unwind_Exception *);
  281. _Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow(_Unwind_Exception *);
  282.  
  283. void *_Unwind_FindEnclosingFunction(void *);
  284.  
  285. #ifdef __APPLE__
  286.  
  287. _Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *)
  288.     __attribute__((__unavailable__));
  289. _Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *)
  290.     __attribute__((__unavailable__));
  291.  
  292. /* Darwin-specific functions */
  293. void __register_frame(const void *);
  294. void __deregister_frame(const void *);
  295.  
  296. struct dwarf_eh_bases {
  297.   uintptr_t tbase;
  298.   uintptr_t dbase;
  299.   uintptr_t func;
  300. };
  301. void *_Unwind_Find_FDE(const void *, struct dwarf_eh_bases *);
  302.  
  303. void __register_frame_info_bases(const void *, void *, void *, void *)
  304.   __attribute__((__unavailable__));
  305. void __register_frame_info(const void *, void *) __attribute__((__unavailable__));
  306. void __register_frame_info_table_bases(const void *, void*, void *, void *)
  307.   __attribute__((__unavailable__));
  308. void __register_frame_info_table(const void *, void *)
  309.   __attribute__((__unavailable__));
  310. void __register_frame_table(const void *) __attribute__((__unavailable__));
  311. void __deregister_frame_info(const void *) __attribute__((__unavailable__));
  312. void __deregister_frame_info_bases(const void *)__attribute__((__unavailable__));
  313.  
  314. #else
  315.  
  316. _Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *);
  317. _Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *);
  318.  
  319. #endif
  320.  
  321.  
  322. #ifndef HIDE_EXPORTS
  323. #pragma GCC visibility pop
  324. #endif
  325.  
  326. #ifdef __cplusplus
  327. }
  328. #endif
  329.  
  330. #endif
  331.  
  332. #endif /* __CLANG_UNWIND_H */
  333.