exception.h File Reference

#include <stdint.h>
#include <stddef.h>
#include "me.h"
#include "core.h"

Go to the source code of this file.

Data Structures
struct	_EXCEPTION_RECORD
struct	_CONTEXT
struct	_EXCEPTION_REGISTRATION_RECORD
struct	_EX_FRAME_REGISTRATION
struct	_EXCEPTION_RANGE

Macros
#define	EXCEPTION_MAXIMUM_PARAMETERS   15
#define	try
#define	except
#define	end_try
#define	leave   do { goto _try_break; } while (0)

Typedefs
typedef struct _EXCEPTION_RECORD	EXCEPTION_RECORD
typedef struct _EXCEPTION_RECORD *	PEXCEPTION_RECORD
typedef enum _EXCEPTION_DISPOSITION	EXCEPTION_DISPOSITION
typedef struct _CONTEXT	CONTEXT
typedef struct _CONTEXT *	PCONTEXT
typedef struct _EXCEPTION_REGISTRATION_RECORD	EXCEPTION_REGISTRATION_RECORD
typedef struct _EX_FRAME_REGISTRATION	EX_FRAME_REGISTRATION
typedef struct _EXCEPTION_RANGE	EXCEPTION_RANGE
typedef struct _EXCEPTION_RANGE *	PEXCEPTION_RANGE

Enumerations
enum	_EXCEPTION_DISPOSITION { ExceptionContinueExecution = 0 , ExceptionContinueSearch = 1 , ExceptionNestedException = 2 , ExceptionCollidedUnwind = 3 }

Functions
uint64_t	MiSearchExceptionTable (uint64_t rip)
PETHREAD	PsGetCurrentThread (void)
bool	ExpCaptureContext (IN PCONTEXT Context)
EXCEPTION_DISPOSITION	MeStandardHandler (PEXCEPTION_RECORD ExceptionRecord, void *EstablisherFrame, PCONTEXT ContextRecord, void *DispatcherContext)
bool	ExpIsExceptionHandlerPresent (IN PETHREAD Thread)
void	ExpDispatchException (IN PTRAP_FRAME TrapFrame, IN PCONTEXT ContextRecord, IN PEXCEPTION_RECORD ExceptionRecord)
uint64_t	ExpFindKernelModeExceptionHandler (uint64_t Rip)
bool	ExpIsPrivilegedInstruction (uint8_t *Ip)
MTSTATUS	ProbeForRead (IN const void *Address, IN size_t Length, IN uint32_t Alignment)
void	ExpRaiseStatus (IN MTSTATUS Status, IN uint64_t Rip)

Variables
EXCEPTION_RANGE	__start_ex_table []
EXCEPTION_RANGE	__stop_ex_table []

Macro Definition Documentation

end_try

#define end_try

Value:

    }                                                               \
    _try_break:                                                     \
        __clac();                                                   \
} while (0)

Definition at line 145 of file exception.h.

except

#define except

Value:

    }                                                   \
    __asm__ volatile("" ::: "memory");                  \
    _try_end:                                          \
    {                                                   \
        int _volatile_true = 1;                         \
        __asm__ volatile("" : "+r"(_volatile_true));    \
        if (_volatile_true) goto _try_break;            \
    }                                                   \
    _except_label:                                      \
    {                                                   \
    __clac();                                           \
        /* The Page fault handler jumps here if we faulted */

Definition at line 131 of file exception.h.

EXCEPTION_MAXIMUM_PARAMETERS

#define EXCEPTION_MAXIMUM_PARAMETERS   15

Definition at line 34 of file exception.h.

leave

#define leave   do { goto _try_break; } while (0)

Definition at line 150 of file exception.h.

try

#define try

Value:

    do { \
    __label__ _try_start, _try_end, _except_label, _try_break;      \
    __stac();                                                       \
    /*  Emit the table entry linking this range to the handler */   \
    __asm__ volatile (                                              \
        ".section __ex_table,\"a\"\n\t"                             \
        ".quad %P0, %P1, %P2\n\t"                                   \
        ".previous\n\t"                                             \
            :                                                       \
        : "i" (&& _try_start), "i" (&& _try_end), "i" (&& _except_label)\
    );                                                          \
    /* Start of protected region */                                 \
    _try_start:                                                     \
    __asm__ volatile("" ::: "memory"); /* Prevent hoisting */       \
    {

Definition at line 115 of file exception.h.

Typedef Documentation

CONTEXT

typedef struct _CONTEXT CONTEXT

EX_FRAME_REGISTRATION

typedef struct _EX_FRAME_REGISTRATION EX_FRAME_REGISTRATION

EXCEPTION_DISPOSITION

typedef enum _EXCEPTION_DISPOSITION EXCEPTION_DISPOSITION

EXCEPTION_RANGE

typedef struct _EXCEPTION_RANGE EXCEPTION_RANGE

EXCEPTION_RECORD

typedef struct _EXCEPTION_RECORD EXCEPTION_RECORD

EXCEPTION_REGISTRATION_RECORD

typedef struct _EXCEPTION_REGISTRATION_RECORD EXCEPTION_REGISTRATION_RECORD

PCONTEXT

typedef struct _CONTEXT * PCONTEXT

PEXCEPTION_RANGE

typedef struct _EXCEPTION_RANGE * PEXCEPTION_RANGE

PEXCEPTION_RECORD

typedef struct _EXCEPTION_RECORD * PEXCEPTION_RECORD

Enumeration Type Documentation

_EXCEPTION_DISPOSITION

enum _EXCEPTION_DISPOSITION

Enumerator
ExceptionContinueExecution
ExceptionContinueSearch
ExceptionNestedException
ExceptionCollidedUnwind

Definition at line 43 of file exception.h.

Function Documentation

ExpCaptureContext()

bool ExpCaptureContext ( IN PCONTEXT Context )

extern

ExpDispatchException()

void ExpDispatchException	(	IN PTRAP_FRAME	TrapFrame,
		IN PCONTEXT	ContextRecord,
		IN PEXCEPTION_RECORD	ExceptionRecord )

Definition at line 56 of file exception.c.

ExpFindKernelModeExceptionHandler()

uint64_t ExpFindKernelModeExceptionHandler

(

uint64_t

Rip

)

Definition at line 114 of file exception.c.

ExpIsExceptionHandlerPresent()

bool ExpIsExceptionHandlerPresent

(

IN PETHREAD

Thread

)

Definition at line 23 of file exception.c.

ExpIsPrivilegedInstruction()

bool ExpIsPrivilegedInstruction

(

uint8_t *

Ip

)

Definition at line 4 of file instruction.c.

ExpRaiseStatus()

void ExpRaiseStatus	(	IN MTSTATUS	Status,
		IN uint64_t	Rip )

Definition at line 23 of file raise.c.

MeStandardHandler()

EXCEPTION_DISPOSITION MeStandardHandler	(	PEXCEPTION_RECORD	ExceptionRecord,
		void *	EstablisherFrame,
		PCONTEXT	ContextRecord,
		void *	DispatcherContext )

MiSearchExceptionTable()

uint64_t MiSearchExceptionTable

(

uint64_t

rip

)

ProbeForRead()

MTSTATUS ProbeForRead	(	IN const void *	Address,
		IN size_t	Length,
		IN uint32_t	Alignment )

Definition at line 23 of file probe.c.

PsGetCurrentThread()

PETHREAD PsGetCurrentThread ( void )

extern

Definition at line 279 of file thread.c.

Variable Documentation

__start_ex_table

EXCEPTION_RANGE __start_ex_table[]

extern

__stop_ex_table

EXCEPTION_RANGE __stop_ex_table[]

extern