#ifndef _NT_EXCEPTION_H_

#define _NT_EXCEPTION_H_

#include "nt_abi.h"

#include "nt_object.h"

#include "nt_thread.h"

/* exception limits */

#define NT_EXCEPTION_MAX_PARAMS		(0x0F)

/* exception flags */

#define NT_EXCEPTION_FLAG_NONCONTINUABLE	(1 << 0)

#define NT_EXCEPTION_FLAG_UNWINDING		(1 << 1)

#define NT_EXCEPTION_FLAG_EXIT_UNWIND		(1 << 2)

#define NT_EXCEPTION_FLAG_STACK_INVALID		(1 << 3)

#define NT_EXCEPTION_FLAG_NESTED_CALL		(1 << 4)

#define NT_EXCEPTION_FLAG_TARGET_UNWIND		(1 << 5)

#define NT_EXCEPTION_FLAG_COLLIDED_UNWIND 	(1 << 6)

#define NT_EXCEPTION_FLAG_UNWIND		(  NT_EXCEPTION_UNWINDING    \

						|| NT_EXCEPTION_EXIT_UNWIND   \

						|| NT_EXCEPTION_TARGET_UNWIND  \

						|| NT_EXCEPTION_COLLIDED_UNWIND )

/* exception definitions */

typedef struct _nt_exception_record	nt_exception_record;

typedef struct _nt_dispatcher_context   nt_dispatcher_context;

typedef struct _nt_unwind_history_table	nt_unwind_history_table;

typedef enum _nt_exception_disposition {

	NT_EXCEPTION_CONTINUE_EXECUTION,

	NT_EXCEPTION_CONTINUE_SEARCH,

	NT_EXCEPTION_NESTED_EXCEPTION,

	NT_EXCEPTION_COLLIDED_UNWIND

} nt_exception_disposition;

typedef struct _nt_exception_record {

	uint32_t			exception_code;

	uint32_t			exception_flags;

	struct _nt_exception_record *	exception_record;

	void *				exception_address;

	uint32_t			number_of_params;

	uintptr_t			exception_information[NT_EXCEPTION_MAX_PARAMS];

} nt_exception_record;

typedef struct _nt_runtime_function {

	uint32_t	raddr_fn_start;

	uint32_t	raddr_fn_end;

	uint32_t	raddr_uw_info;

} nt_runtime_function;

typedef nt_exception_disposition (*nt_exception_routine)(

	nt_exception_record *,

	uintptr_t,

	nt_thread_context *,

	nt_dispatcher_context *);

typedef struct _nt_dispatcher_context {

	uintptr_t			control_pc;

	uintptr_t			image_base;

	nt_runtime_function *		fn_entry;

	uintptr_t			establisher_frame;

	uintptr_t			target_ip;

	nt_thread_context *		tctx;

	nt_exception_routine		language_handler;

	void *				handler_data;

	nt_unwind_history_table *	history_table;

	uint32_t			scope_index;

	uint32_t			__pad;

} nt_dispatcher_context;

/* exception interfaces */

typedef int32_t __stdcall ntapi_zw_raise_exception(

	__in	nt_exception_record *	exception_record,

	__in	nt_thread_context *	context,

	__in	unsigned char		search_frames);

typedef int32_t __stdcall ntapi_zw_continue(

	__in	nt_thread_context *	context,

	__in	unsigned char		test_alert);

#endif