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Initial OS level SEH support.

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svn path=/trunk/; revision=2257
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Casper Hornstrup 2001-09-24 01:09:51 +00:00
parent 0948ab6596
commit 9a6d677db3
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reactos/include/ntos/except.h Normal file
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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: include/ntos/except.h
* PURPOSE: Exception handling structures
* PROGRAMMER: Casper S. Hornstrup <chorns@users.sourceforge.net>
*/
#ifndef __INCLUDE_EXCEPT_H
#define __INCLUDE_EXCEPT_H
typedef enum {
ExceptionContinueExecution = 0,
ExceptionContinueSearch,
ExceptionNestedException,
ExceptionCollidedUnwind,
ExceptionDismiss // ???
} EXCEPTION_DISPOSITION;
struct _EXCEPTION_RECORD;
struct _EXCEPTION_REGISTRATION;
/*
* The type of function that is expected as an exception handler to be
* installed with _try1.
*/
typedef EXCEPTION_DISPOSITION CDECL (*PEXCEPTION_HANDLER)(
struct _EXCEPTION_RECORD* ExceptionRecord,
struct _EXCEPTION_REGISTRATION* ExceptionRegistration,
struct _CONTEXT* Context,
PVOID DispatcherContext);
#define EXCEPTION_MAXIMUM_PARAMETERS (15)
typedef struct _EXCEPTION_RECORD {
DWORD ExceptionCode;
DWORD ExceptionFlags;
struct _EXCEPTION_RECORD *ExceptionRecord;
PVOID ExceptionAddress;
DWORD NumberParameters;
DWORD ExceptionInformation[EXCEPTION_MAXIMUM_PARAMETERS];
} EXCEPTION_RECORD, *PEXCEPTION_RECORD, *LPEXCEPTION_RECORD;
/* ExceptionFlags */
#ifndef _GNU_H_WINDOWS32_DEFINES
#ifdef __NTOSKRNL__
#define EXCEPTION_NONCONTINUABLE 0x01
#endif /* __NTOSKRNL__ */
#endif /* _GNU_H_WINDOWS32_DEFINES */
#define EXCEPTION_UNWINDING 0x02
#define EXCEPTION_EXIT_UNWIND 0x04
#define EXCEPTION_STACK_INVALID 0x08
#define EXCEPTION_NESTED_CALL 0x10
typedef struct _EXCEPTION_POINTERS {
PEXCEPTION_RECORD ExceptionRecord;
PCONTEXT ContextRecord;
} EXCEPTION_POINTERS, *PEXCEPTION_POINTERS, *LPEXCEPTION_POINTERS;
typedef struct _EXCEPTION_REGISTRATION
{
struct _EXCEPTION_REGISTRATION* prev;
PEXCEPTION_HANDLER handler;
} EXCEPTION_REGISTRATION, *PEXCEPTION_REGISTRATION;
typedef EXCEPTION_REGISTRATION EXCEPTION_REGISTRATION_RECORD;
typedef PEXCEPTION_REGISTRATION PEXCEPTION_REGISTRATION_RECORD;
/*
* A macro which installs the supplied exception handler.
* Push the pointer to the new handler onto the stack,
* then push the pointer to the old registration structure (at fs:0)
* onto the stack, then put a pointer to the new registration
* structure (i.e. the current stack pointer) at fs:0.
*/
#define __try1(pHandler) \
__asm__ ("pushl %0;pushl %%fs:0;movl %%esp,%%fs:0;" : : "g" (pHandler));
/*
* A macro which (dispite its name) *removes* an installed
* exception handler. Should be used only in conjunction with the above
* install routine __try1.
* Move the pointer to the old reg. struct (at the current stack
* position) to fs:0, replacing the pointer we installed above,
* then add 8 to the stack pointer to get rid of the space we
* used when we pushed on our new reg. struct above. Notice that
* the stack must be in the exact state at this point that it was
* after we did _try1 or this will smash things.
*/
#define __except1 \
__asm__ ("movl (%%esp),%%eax;movl %%eax,%%fs:0;addl $8,%%esp;" \
: : : "%eax");
#if 1
// Runtime DLL structures
#ifndef _GNU_H_WINDOWS32_DEFINES
#ifdef __NTOSKRNL__
#define EXCEPTION_EXECUTE_HANDLER 1
#define EXCEPTION_CONTINUE_SEARCH 0
#define EXCEPTION_CONTINUE_EXECUTION -1
#endif /* __NTOSKRNL__ */
#endif /* _GNU_H_WINDOWS32_DEFINES */
// Functions of the following prototype return one of the above constants
typedef DWORD CDECL (*PSCOPE_EXCEPTION_FILTER)(VOID);
typedef VOID CDECL (*PSCOPE_EXCEPTION_HANDLER)(VOID);
typedef struct _SCOPETABLE_ENTRY
{
DWORD PreviousTryLevel;
PSCOPE_EXCEPTION_FILTER FilterRoutine;
PSCOPE_EXCEPTION_HANDLER HandlerRoutine;
} SCOPETABLE_ENTRY, *PSCOPETABLE_ENTRY;
/*
Other structures preceeding this structure:
ULONG_PTR StandardESPInFrame;
LPEXCEPTION_POINTERS ExceptionPointers;
*/
typedef struct _RTL_EXCEPTION_REGISTRATION_I386
{
EXCEPTION_REGISTRATION OS;
PSCOPETABLE_ENTRY ScopeTable;
DWORD TryLevel;
/* Value of EBP before the EXCEPTION_REGISTRATION was created */
ULONG_PTR Ebp;
} RTL_EXCEPTION_REGISTRATION_I386, *PRTL_EXCEPTION_REGISTRATION_I386;
#define TRYLEVEL_NONE -1
typedef RTL_EXCEPTION_REGISTRATION_I386 RTL_EXCEPTION_REGISTRATION;
typedef PRTL_EXCEPTION_REGISTRATION_I386 PRTL_EXCEPTION_REGISTRATION;
#endif
#endif /* __INCLUDE_EXCEPT_H */