reactos/lib/crt/except/unwind.c

   1 #include "precomp.h"
   2 #include <winternl.h>
   3
   4 /*
   5  * @implemented
   6  */
   7 void __cdecl
   8 _global_unwind2(PEXCEPTION_REGISTRATION RegistrationFrame)
   9 {
  10 #ifdef __GNUC__
  11    RtlUnwind(RegistrationFrame, &&__ret_label, NULL, 0);
  12 __ret_label:
  13    // return is important
  14    return;
  15 #else
  16 #endif
  17 }
  18
  19
  20 // This is dragged over from WINE:
  21
  22 typedef struct __EXCEPTION_FRAME
  23 {
  24   struct __EXCEPTION_FRAME *Prev;
  25   PEXCEPTION_HANDLER       Handler;
  26 } EXCEPTION_FRAME, *PEXCEPTION_FRAME;
  27
  28 /* VC++ extensions to Win32 SEH */
  29 typedef struct _SCOPETABLE
  30 {
  31   int previousTryLevel;
  32   int (*lpfnFilter)(PEXCEPTION_POINTERS);
  33   int (*lpfnHandler)(void);
  34 } SCOPETABLE, *PSCOPETABLE;
  35
  36 typedef struct _MSVCRT_EXCEPTION_FRAME
  37 {
  38   EXCEPTION_FRAME *prev;
  39   void (*handler)(PEXCEPTION_RECORD, PEXCEPTION_FRAME,
  40                   PCONTEXT, PEXCEPTION_RECORD);
  41   PSCOPETABLE scopetable;
  42   int trylevel;
  43   int _ebp;
  44   PEXCEPTION_POINTERS xpointers;
  45 } MSVCRT_EXCEPTION_FRAME;
  46
  47
  48 typedef struct __JUMP_BUFFER
  49 {
  50     unsigned long Ebp;
  51     unsigned long Ebx;
  52     unsigned long Edi;
  53     unsigned long Esi;
  54     unsigned long Esp;
  55     unsigned long Eip;
  56     unsigned long Registration;
  57     unsigned long TryLevel;
  58     /* Start of new struct members */
  59     unsigned long Cookie;
  60     unsigned long UnwindFunc;
  61     unsigned long UnwindData[6];
  62 } _JUMP_BUFFER;
  63
  64 void
  65 _local_unwind2(MSVCRT_EXCEPTION_FRAME *RegistrationFrame,
  66                       LONG TryLevel);
  67
  68 /*
  69  * @implemented
  70 */
  71
  72 void __stdcall _seh_longjmp_unwind(_JUMP_BUFFER *jmp)
  73 {
  74     _local_unwind2((MSVCRT_EXCEPTION_FRAME*) jmp->Registration, jmp->TryLevel);
  75 }