diff options
Diffstat (limited to 'EdkModulePkg/Universal/Ebc/Dxe/Ia32')
| -rw-r--r-- | EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.S | 54 | ||||
| -rw-r--r-- | EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.asm | 163 | ||||
| -rw-r--r-- | EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcSupport.c | 545 |
3 files changed, 0 insertions, 762 deletions
diff --git a/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.S b/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.S deleted file mode 100644 index 2df0f0c3e0..0000000000 --- a/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.S +++ /dev/null @@ -1,54 +0,0 @@ -#**************************************************************************** -#* -#* 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. -#* -#**************************************************************************** -.globl ASM_PFX(CopyMem) - -.globl ASM_PFX(EbcLLCALLEXNative) -ASM_PFX(EbcLLCALLEXNative): - push %ebp
- push %ebx
- mov %esp,%ebp
- mov 0xc(%esp),%ecx
- mov 0x14(%esp),%eax
- mov 0x10(%esp),%edx
- sub %edx,%eax
- sub %eax,%esp
- mov %esp,%ebx
- push %ecx
- push %eax
- push %edx
- push %ebx
- call ASM_PFX(CopyMem)
- pop %eax
- pop %eax
- pop %eax
- pop %ecx
- call *%ecx
- mov %ebp,%esp
- mov %ebp,%esp
- pop %ebx
- pop %ebp
- ret
- -.globl ASM_PFX(EbcLLGetEbcEntryPoint) -ASM_PFX(EbcLLGetEbcEntryPoint): - ret - -.globl ASM_PFX(EbcLLGetStackPointer) -ASM_PFX(EbcLLGetStackPointer): - mov %esp,%eax - add $0x4,%eax - ret - -.globl ASM_PFX(EbcLLGetReturnValue) -ASM_PFX(EbcLLGetReturnValue): - ret diff --git a/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.asm b/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.asm deleted file mode 100644 index 4249241e7d..0000000000 --- a/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.asm +++ /dev/null @@ -1,163 +0,0 @@ - page ,132
- title VM ASSEMBLY LANGUAGE ROUTINES
-;****************************************************************************
-;*
-;* Copyright (c) 2006 - 2007, 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.
-;*
-;****************************************************************************
-;****************************************************************************
-; REV 1.0
-;****************************************************************************
-;
-; Rev Date Description
-; --- -------- ------------------------------------------------------------
-; 1.0 03/14/01 Initial creation of file.
-;
-;****************************************************************************
-
-;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
-; This code provides low level routines that support the Virtual Machine
-; for option ROMs.
-;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
-
-;---------------------------------------------------------------------------
-; Equate files needed.
-;---------------------------------------------------------------------------
-
-.XLIST
-
-.LIST
-
-;---------------------------------------------------------------------------
-; Assembler options
-;---------------------------------------------------------------------------
-
-.686p
-.model flat
-.code
-;---------------------------------------------------------------------------
-;;GenericPostSegment SEGMENT USE16
-;---------------------------------------------------------------------------
-CopyMem PROTO C Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
-
-;****************************************************************************
-; EbcLLCALLEXNative
-;
-; This function is called to execute an EBC CALLEX instruction
-; to native code.
-; This instruction requires that we thunk out to external native
-; code. For IA32, we simply switch stacks and jump to the
-; specified function. On return, we restore the stack pointer
-; to its original location.
-;
-; Destroys no working registers.
-;****************************************************************************
-; VOID EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
-_EbcLLCALLEXNative PROC NEAR PUBLIC
- push ebp
- push ebx
- mov ebp, esp ; standard function prolog
-
- ; Get function address in a register
- ; mov ecx, FuncAddr => mov ecx, dword ptr [FuncAddr]
- mov ecx, dword ptr [esp]+0Ch
-
- ; Set stack pointer to new value
- ; mov eax, NewStackPointer => mov eax, dword ptr [NewSp]
- mov eax, dword ptr [esp] + 14h
- mov edx, dword ptr [esp] + 10h
- sub eax, edx
- sub esp, eax
- mov ebx, esp
- push ecx
- push eax
- push edx
- push ebx
- call CopyMem
- pop eax
- pop eax
- pop eax
- pop ecx
-
- ; Now call the external routine
- call ecx
-
- ; ebp is preserved by the callee. In this function it
- ; equals the original esp, so set them equal
- mov esp, ebp
-
- ; Standard function epilog
- mov esp, ebp
- pop ebx
- pop ebp
- ret
-_EbcLLCALLEXNative ENDP
-
-
-; UINTN EbcLLGetEbcEntryPoint(VOID);
-; Routine Description:
-; The VM thunk code stuffs an EBC entry point into a processor
-; register. Since we can't use inline assembly to get it from
-; the interpreter C code, stuff it into the return value
-; register and return.
-;
-; Arguments:
-; None.
-;
-; Returns:
-; The contents of the register in which the entry point is passed.
-;
-_EbcLLGetEbcEntryPoint PROC NEAR PUBLIC
- ret
-_EbcLLGetEbcEntryPoint ENDP
-
-;/*++
-;
-;Routine Description:
-;
-; Return the caller's value of the stack pointer.
-;
-;Arguments:
-;
-; None.
-;
-;Returns:
-;
-; The current value of the stack pointer for the caller. We
-; adjust it by 4 here because when they called us, the return address
-; is put on the stack, thereby lowering it by 4 bytes.
-;
-;--*/
-
-; UINTN EbcLLGetStackPointer()
-_EbcLLGetStackPointer PROC NEAR PUBLIC
- mov eax, esp ; get current stack pointer
- add eax, 4 ; stack adjusted by this much when we were called
- ret
-_EbcLLGetStackPointer ENDP
-
-; UINT64 EbcLLGetReturnValue(VOID);
-; Routine Description:
-; When EBC calls native, on return the VM has to stuff the return
-; value into a VM register. It's assumed here that the value is still
-; in the register, so simply return and the caller should get the
-; return result properly.
-;
-; Arguments:
-; None.
-;
-; Returns:
-; The unmodified value returned by the native code.
-;
-_EbcLLGetReturnValue PROC NEAR PUBLIC
- ret
-_EbcLLGetReturnValue ENDP
-
-END
diff --git a/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcSupport.c b/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcSupport.c deleted file mode 100644 index a534e00780..0000000000 --- a/EdkModulePkg/Universal/Ebc/Dxe/Ia32/EbcSupport.c +++ /dev/null @@ -1,545 +0,0 @@ -/*++
-
-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:
-
- EbcSupport.c
-
-Abstract:
-
- This module contains EBC support routines that are customized based on
- the target processor.
-
---*/
-
-#include "EbcInt.h"
-#include "EbcExecute.h"
-
-//
-// NOTE: This is the stack size allocated for the interpreter
-// when it executes an EBC image. The requirements can change
-// based on whether or not a debugger is present, and other
-// platform-specific configurations.
-//
-#define VM_STACK_SIZE (1024 * 4)
-#define EBC_THUNK_SIZE 32
-
-#define STACK_REMAIN_SIZE (1024 * 4)
-VOID
-EbcLLCALLEX (
- IN VM_CONTEXT *VmPtr,
- IN UINTN FuncAddr,
- IN UINTN NewStackPointer,
- IN VOID *FramePtr,
- IN UINT8 Size
- )
-/*++
-
-Routine Description:
-
- This function is called to execute an EBC CALLEX instruction.
- The function check the callee's content to see whether it is common native
- code or a thunk to another piece of EBC code.
- If the callee is common native code, use EbcLLCAllEXASM to manipulate,
- otherwise, set the VM->IP to target EBC code directly to avoid another VM
- be startup which cost time and stack space.
-
-Arguments:
-
- VmPtr - Pointer to a VM context.
- FuncAddr - Callee's address
- NewStackPointer - New stack pointer after the call
- FramePtr - New frame pointer after the call
- Size - The size of call instruction
-
-Returns:
-
- None.
-
---*/
-{
- UINTN IsThunk;
- UINTN TargetEbcAddr;
-
- IsThunk = 1;
- TargetEbcAddr = 0;
-
- //
- // Processor specific code to check whether the callee is a thunk to EBC.
- //
- if (*((UINT8 *)FuncAddr) != 0xB8) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 1) != 0xBC) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 2) != 0x2E) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 3) != 0x11) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 4) != 0xCA) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 5) != 0xB8) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 10) != 0xB9) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 15) != 0xFF) {
- IsThunk = 0;
- goto Action;
- }
- if (*((UINT8 *)FuncAddr + 16) != 0xE1) {
- IsThunk = 0;
- goto Action;
- }
-
- TargetEbcAddr = ((UINTN)(*((UINT8 *)FuncAddr + 9)) << 24) + ((UINTN)(*((UINT8 *)FuncAddr + 8)) << 16) +
- ((UINTN)(*((UINT8 *)FuncAddr + 7)) << 8) + ((UINTN)(*((UINT8 *)FuncAddr + 6)));
-
-Action:
- if (IsThunk == 1){
- //
- // The callee is a thunk to EBC, adjust the stack pointer down 16 bytes and
- // put our return address and frame pointer on the VM stack.
- // Then set the VM's IP to new EBC code.
- //
- VmPtr->R[0] -= 8;
- VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], (UINTN) FramePtr);
- VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->R[0];
- VmPtr->R[0] -= 8;
- VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], (UINT64) (UINTN) (VmPtr->Ip + Size));
-
- VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;
- } else {
- //
- // The callee is not a thunk to EBC, call native code.
- //
- EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);
-
- //
- // Get return value and advance the IP.
- //
- VmPtr->R[7] = EbcLLGetReturnValue ();
- VmPtr->Ip += Size;
- }
-}
-
-STATIC
-UINT64
-EbcInterpret (
- IN OUT UINTN Arg1,
- IN OUT UINTN Arg2,
- IN OUT UINTN Arg3,
- IN OUT UINTN Arg4,
- IN OUT UINTN Arg5,
- IN OUT UINTN Arg6,
- IN OUT UINTN Arg7,
- IN OUT UINTN Arg8,
- IN OUT UINTN Arg9,
- IN OUT UINTN Arg10,
- IN OUT UINTN Arg11,
- IN OUT UINTN Arg12,
- IN OUT UINTN Arg13,
- IN OUT UINTN Arg14,
- IN OUT UINTN Arg15,
- IN OUT UINTN Arg16
- )
-/*++
-
-Routine Description:
-
- Begin executing an EBC image. The address of the entry point is passed
- in via a processor register, so we'll need to make a call to get the
- value.
-
-Arguments:
-
- None. Since we're called from a fixed up thunk (which we want to keep
- small), our only so-called argument is the EBC entry point passed in
- to us in a processor register.
-
-Returns:
-
- The value returned by the EBC application we're going to run.
-
---*/
-{
- //
- // Create a new VM context on the stack
- //
- VM_CONTEXT VmContext;
- UINTN Addr;
- EFI_STATUS Status;
- UINTN StackIndex;
-
- //
- // Get the EBC entry point from the processor register.
- //
- Addr = EbcLLGetEbcEntryPoint ();
-
- //
- // Now clear out our context
- //
- ZeroMem ((VOID *) &VmContext, sizeof (VM_CONTEXT));
-
- //
- // Set the VM instruction pointer to the correct location in memory.
- //
- VmContext.Ip = (VMIP) Addr;
- //
- // Initialize the stack pointer for the EBC. Get the current system stack
- // pointer and adjust it down by the max needed for the interpreter.
- //
-
- //
- // Align the stack on a natural boundary
- //
-
- //
- // Allocate stack pool
- //
- Status = GetEBCStack((EFI_HANDLE)-1, &VmContext.StackPool, &StackIndex);
- if (EFI_ERROR(Status)) {
- return Status;
- }
- VmContext.StackTop = (UINT8*)VmContext.StackPool + (STACK_REMAIN_SIZE);
- VmContext.R[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);
- VmContext.HighStackBottom = (UINTN)VmContext.R[0];
- VmContext.R[0] &= ~(sizeof (UINTN) - 1);
- VmContext.R[0] -= sizeof (UINTN);
-
- //
- // Put a magic value in the stack gap, then adjust down again
- //
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) VM_STACK_KEY_VALUE;
- VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.R[0];
- VmContext.LowStackTop = (UINTN) VmContext.R[0];
-
- //
- // For IA32, this is where we say our return address is
- //
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg16;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg15;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg14;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg13;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg12;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg11;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg10;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg9;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg8;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg7;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg6;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg5;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg4;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg3;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg2;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg1;
- VmContext.R[0] -= 16;
- VmContext.StackRetAddr = (UINT64) VmContext.R[0];
-
- //
- // We need to keep track of where the EBC stack starts. This way, if the EBC
- // accesses any stack variables above its initial stack setting, then we know
- // it's accessing variables passed into it, which means the data is on the
- // VM's stack.
- // When we're called, on the stack (high to low) we have the parameters, the
- // return address, then the saved ebp. Save the pointer to the return address.
- // EBC code knows that's there, so should look above it for function parameters.
- // The offset is the size of locals (VMContext + Addr + saved ebp).
- // Note that the interpreter assumes there is a 16 bytes of return address on
- // the stack too, so adjust accordingly.
- // VmContext.HighStackBottom = (UINTN)(Addr + sizeof (VmContext) + sizeof (Addr));
- //
-
- //
- // Begin executing the EBC code
- //
- EbcExecute (&VmContext);
-
- //
- // Return the value in R[7] unless there was an error
- //
- ReturnEBCStack(StackIndex);
- return (UINT64) VmContext.R[7];
-}
-
-STATIC
-UINT64
-ExecuteEbcImageEntryPoint (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-/*++
-
-Routine Description:
-
- Begin executing an EBC image. The address of the entry point is passed
- in via a processor register, so we'll need to make a call to get the
- value.
-
-Arguments:
-
- ImageHandle - image handle for the EBC application we're executing
- SystemTable - standard system table passed into an driver's entry point
-
-Returns:
-
- The value returned by the EBC application we're going to run.
-
---*/
-{
- //
- // Create a new VM context on the stack
- //
- VM_CONTEXT VmContext;
- UINTN Addr;
- EFI_STATUS Status;
- UINTN StackIndex;
-
- //
- // Get the EBC entry point from the processor register. Make sure you don't
- // call any functions before this or you could mess up the register the
- // entry point is passed in.
- //
- Addr = EbcLLGetEbcEntryPoint ();
-
- //
- // Print(L"*** Thunked into EBC entry point - ImageHandle = 0x%X\n", (UINTN)ImageHandle);
- // Print(L"EBC entry point is 0x%X\n", (UINT32)(UINTN)Addr);
- //
- // Now clear out our context
- //
- ZeroMem ((VOID *) &VmContext, sizeof (VM_CONTEXT));
-
- //
- // Save the image handle so we can track the thunks created for this image
- //
- VmContext.ImageHandle = ImageHandle;
- VmContext.SystemTable = SystemTable;
-
- //
- // Set the VM instruction pointer to the correct location in memory.
- //
- VmContext.Ip = (VMIP) Addr;
-
- //
- // Initialize the stack pointer for the EBC. Get the current system stack
- // pointer and adjust it down by the max needed for the interpreter.
- //
-
- //
- // Allocate stack pool
- //
- Status = GetEBCStack(ImageHandle, &VmContext.StackPool, &StackIndex);
- if (EFI_ERROR(Status)) {
- return Status;
- }
- VmContext.StackTop = (UINT8*)VmContext.StackPool + (STACK_REMAIN_SIZE);
- VmContext.R[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);
- VmContext.HighStackBottom = (UINTN)VmContext.R[0];
- VmContext.R[0] -= sizeof (UINTN);
-
- //
- // Put a magic value in the stack gap, then adjust down again
- //
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) VM_STACK_KEY_VALUE;
- VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.R[0];
-
- //
- // Align the stack on a natural boundary
- // VmContext.R[0] &= ~(sizeof(UINTN) - 1);
- //
- VmContext.LowStackTop = (UINTN) VmContext.R[0];
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) SystemTable;
- VmContext.R[0] -= sizeof (UINTN);
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) ImageHandle;
-
- VmContext.R[0] -= 16;
- VmContext.StackRetAddr = (UINT64) VmContext.R[0];
- //
- // VM pushes 16-bytes for return address. Simulate that here.
- //
-
- //
- // Begin executing the EBC code
- //
- EbcExecute (&VmContext);
-
- //
- // Return the value in R[7] unless there was an error
- //
- return (UINT64) VmContext.R[7];
-}
-
-EFI_STATUS
-EbcCreateThunks (
- IN EFI_HANDLE ImageHandle,
- IN VOID *EbcEntryPoint,
- OUT VOID **Thunk,
- IN UINT32 Flags
- )
-/*++
-
-Routine Description:
-
- Create an IA32 thunk for the given EBC entry point.
-
-Arguments:
-
- ImageHandle - Handle of image for which this thunk is being created
- EbcEntryPoint - Address of the EBC code that the thunk is to call
- Thunk - Returned thunk we create here
-
-Returns:
-
- Standard EFI status.
-
---*/
-{
- UINT8 *Ptr;
- UINT8 *ThunkBase;
- UINT32 I;
- UINT32 Addr;
- INT32 Size;
- INT32 ThunkSize;
-
- //
- // Check alignment of pointer to EBC code
- //
- if ((UINT32) (UINTN) EbcEntryPoint & 0x01) {
- return EFI_INVALID_PARAMETER;
- }
-
- Size = EBC_THUNK_SIZE;
- ThunkSize = Size;
-
- Ptr = AllocatePool (Size);
-
- if (Ptr == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- //
- // Print(L"Allocate TH: 0x%X\n", (UINT32)Ptr);
- //
- // Save the start address so we can add a pointer to it to a list later.
- //
- ThunkBase = Ptr;
-
- //
- // Give them the address of our buffer we're going to fix up
- //
- *Thunk = (VOID *) Ptr;
-
- //
- // Add a magic code here to help the VM recognize the thunk..
- // mov eax, 0xca112ebc => B8 BC 2E 11 CA
- //
- *Ptr = 0xB8;
- Ptr++;
- Size--;
- Addr = (UINT32) 0xCA112EBC;
- for (I = 0; I < sizeof (Addr); I++) {
- *Ptr = (UINT8) (UINTN) Addr;
- Addr >>= 8;
- Ptr++;
- Size--;
- }
-
- //
- // Add code bytes to load up a processor register with the EBC entry point.
- // mov eax, 0xaa55aa55 => B8 55 AA 55 AA
- // The first 8 bytes of the thunk entry is the address of the EBC
- // entry point.
- //
- *Ptr = 0xB8;
- Ptr++;
- Size--;
- Addr = (UINT32) EbcEntryPoint;
- for (I = 0; I < sizeof (Addr); I++) {
- *Ptr = (UINT8) (UINTN) Addr;
- Addr >>= 8;
- Ptr++;
- Size--;
- }
- //
- // Stick in a load of ecx with the address of appropriate VM function.
- // mov ecx 12345678h => 0xB9 0x78 0x56 0x34 0x12
- //
- if (Flags & FLAG_THUNK_ENTRY_POINT) {
- Addr = (UINT32) (UINTN) ExecuteEbcImageEntryPoint;
- } else {
- Addr = (UINT32) (UINTN) EbcInterpret;
- }
-
- //
- // MOV ecx
- //
- *Ptr = 0xB9;
- Ptr++;
- Size--;
- for (I = 0; I < sizeof (Addr); I++) {
- *Ptr = (UINT8) Addr;
- Addr >>= 8;
- Ptr++;
- Size--;
- }
- //
- // Stick in jump opcode bytes for jmp ecx => 0xFF 0xE1
- //
- *Ptr = 0xFF;
- Ptr++;
- Size--;
- *Ptr = 0xE1;
- Size--;
-
- //
- // Double check that our defined size is ok (application error)
- //
- if (Size < 0) {
- ASSERT (FALSE);
- return EFI_BUFFER_TOO_SMALL;
- }
- //
- // Add the thunk to the list for this image. Do this last since the add
- // function flushes the cache for us.
- //
- EbcAddImageThunk (ImageHandle, (VOID *) ThunkBase, ThunkSize);
-
- return EFI_SUCCESS;
-}
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