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