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/*++
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
EbcInt.h
Abstract:
Main routines for the EBC interpreter. Includes the initialization and
main interpreter routines.
--*/
#ifndef _EBC_INT_H_
#define _EBC_INT_H_
//
// The package level header files this module uses
//
#include <PiDxe.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Protocol/DebugSupport.h>
#include <Protocol/Ebc.h>
//
// The Library classes this module consumes
//
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
typedef INT64 VM_REGISTER;
typedef UINT8 *VMIP; // instruction pointer for the VM
typedef UINT32 EXCEPTION_FLAGS;
typedef struct {
VM_REGISTER R[8]; // General purpose registers.
UINT64 Flags; // Flags register:
// 0 Set to 1 if the result of the last compare was true
// 1 Set to 1 if stepping
// 2..63 Reserved.
VMIP Ip; // Instruction pointer.
UINTN LastException; //
EXCEPTION_FLAGS ExceptionFlags; // to keep track of exceptions
UINT32 StopFlags;
UINT32 CompilerVersion; // via break(6)
UINTN HighStackBottom; // bottom of the upper stack
UINTN LowStackTop; // top of the lower stack
UINT64 StackRetAddr; // location of final return address on stack
UINTN *StackMagicPtr; // pointer to magic value on stack to detect corruption
EFI_HANDLE ImageHandle; // for this EBC driver
EFI_SYSTEM_TABLE *SystemTable; // for debugging only
UINTN LastAddrConverted; // for debug
UINTN LastAddrConvertedValue; // for debug
VOID *FramePtr;
VOID *EntryPoint; // entry point of EBC image
UINTN ImageBase;
VOID *StackPool;
VOID *StackTop;
} VM_CONTEXT;
extern VM_CONTEXT *mVmPtr;
//
// Bits of exception flags field of VM context
//
#define EXCEPTION_FLAG_FATAL 0x80000000 // can't continue
#define EXCEPTION_FLAG_ERROR 0x40000000 // bad, but try to continue
#define EXCEPTION_FLAG_WARNING 0x20000000 // harmless problem
#define EXCEPTION_FLAG_NONE 0x00000000 // for normal return
//
// Flags passed to the internal create-thunks function.
//
#define FLAG_THUNK_ENTRY_POINT 0x01 // thunk for an image entry point
#define FLAG_THUNK_PROTOCOL 0x00 // thunk for an EBC protocol service
//
// Put this value at the bottom of the VM's stack gap so we can check it on
// occasion to make sure the stack has not been corrupted.
//
#define VM_STACK_KEY_VALUE 0xDEADBEEF
EFI_STATUS
EbcCreateThunks (
IN EFI_HANDLE ImageHandle,
IN VOID *EbcEntryPoint,
OUT VOID **Thunk,
IN UINT32 Flags
)
;
EFI_STATUS
EbcAddImageThunk (
IN EFI_HANDLE ImageHandle,
IN VOID *ThunkBuffer,
IN UINT32 ThunkSize
)
;
//
// The interpreter calls these when an exception is detected,
// or as a periodic callback.
//
EFI_STATUS
EbcDebugSignalException (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EXCEPTION_FLAGS ExceptionFlags,
IN VM_CONTEXT *VmPtr
)
;
//
// Define a constant of how often to call the debugger periodic callback
// function.
//
#define EFI_TIMER_UNIT_1MS (1000 * 10)
#define EBC_VM_PERIODIC_CALLBACK_RATE (1000 * EFI_TIMER_UNIT_1MS)
#define STACK_POOL_SIZE (1024 * 1020)
#define MAX_STACK_NUM 4
EFI_STATUS
EbcDebugSignalPeriodic (
IN VM_CONTEXT *VmPtr
)
;
//
// External low level functions that are native-processor dependent
//
UINTN
EbcLLGetEbcEntryPoint (
VOID
)
;
UINTN
EbcLLGetStackPointer (
VOID
)
;
VOID
EbcLLCALLEXNative (
IN UINTN CallAddr,
IN UINTN EbcSp,
IN VOID *FramePtr
)
;
VOID
EbcLLCALLEX (
IN VM_CONTEXT *VmPtr,
IN UINTN CallAddr,
IN UINTN EbcSp,
IN VOID *FramePtr,
IN UINT8 Size
)
;
INT64
EbcLLGetReturnValue (
VOID
)
;
EFI_STATUS
GetEBCStack(
EFI_HANDLE Handle,
VOID **StackBuffer,
UINTN *BufferIndex
);
EFI_STATUS
ReturnEBCStack(
UINTN Index
);
EFI_STATUS
InitEBCStack (
VOID
);
EFI_STATUS
FreeEBCStack(
VOID
);
EFI_STATUS
ReturnEBCStackByHandle(
EFI_HANDLE Handle
);
//
// Defines for a simple EBC debugger interface
//
typedef struct _EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL;
#define EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL_GUID \
{ \
0x2a72d11e, 0x7376, 0x40f6, { 0x9c, 0x68, 0x23, 0xfa, 0x2f, 0xe3, 0x63, 0xf1 } \
}
typedef
EFI_STATUS
(*EBC_DEBUGGER_SIGNAL_EXCEPTION) (
IN EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL * This,
IN VM_CONTEXT * VmPtr,
IN EFI_EXCEPTION_TYPE ExceptionType
);
typedef
VOID
(*EBC_DEBUGGER_DEBUG) (
IN EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL * This,
IN VM_CONTEXT * VmPtr
);
typedef
UINT32
(*EBC_DEBUGGER_DASM) (
IN EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL * This,
IN VM_CONTEXT * VmPtr,
IN UINT16 *DasmString OPTIONAL,
IN UINT32 DasmStringSize
);
//
// This interface allows you to configure the EBC debug support
// driver. For example, turn on or off saving and printing of
// delta VM even if called. Or to even disable the entire interface,
// in which case all functions become no-ops.
//
typedef
EFI_STATUS
(*EBC_DEBUGGER_CONFIGURE) (
IN EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL * This,
IN UINT32 ConfigId,
IN UINTN ConfigValue
);
//
// Prototype for the actual EBC debug support protocol interface
//
struct _EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL {
EBC_DEBUGGER_DEBUG Debugger;
EBC_DEBUGGER_SIGNAL_EXCEPTION SignalException;
EBC_DEBUGGER_DASM Dasm;
EBC_DEBUGGER_CONFIGURE Configure;
};
typedef struct {
EFI_EBC_PROTOCOL *This;
VOID *EntryPoint;
EFI_HANDLE ImageHandle;
VM_CONTEXT VmContext;
} EFI_EBC_THUNK_DATA;
#define EBC_PROTOCOL_PRIVATE_DATA_SIGNATURE EFI_SIGNATURE_32 ('e', 'b', 'c', 'p')
struct _EBC_PROTOCOL_PRIVATE_DATA {
UINT32 Signature;
EFI_EBC_PROTOCOL EbcProtocol;
UINTN StackBase;
UINTN StackTop;
UINTN StackSize;
} ;
#define EBC_PROTOCOL_PRIVATE_DATA_FROM_THIS(a) \
CR(a, EBC_PROTOCOL_PRIVATE_DATA, EbcProtocol, EBC_PROTOCOL_PRIVATE_DATA_SIGNATURE)
#endif // #ifndef _EBC_INT_H_
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