mirror of https://github.com/acidanthera/audk.git
MdeModulePkg/EbcDxe: Add AARCH64 EBC VM support
Adds support for the EBC VM for AARCH64 platforms Submitted on behalf of a third-party: The Linux Foundation This contribution is licensed under the BSD license as found at http://opensource.org/licenses/bsd-license.php [Taken from https://source.codeaurora.org/external/server/edk2-blue/] Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Reviewed-by: Feng Tian <feng.tian@Intel.com>
This commit is contained in:
Jeff Brasen
Leif Lindholm
parent
3ed4e502b5
commit
a15e5bc286
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#/** @file
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#
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# This code provides low level routines that support the Virtual Machine
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# for option ROMs.
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#
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# Copyright (c) 2015, The Linux Foundation. All rights reserved.
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# Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
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# 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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#
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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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#**/
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#---------------------------------------------------------------------------
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# Equate files needed.
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#---------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(CopyMem);
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ASM_GLOBAL ASM_PFX(EbcInterpret);
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ASM_GLOBAL ASM_PFX(ExecuteEbcImageEntryPoint);
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#****************************************************************************
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# EbcLLCALLEX
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#
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# This function is called to execute an EBC CALLEX instruction.
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# This instruction requires that we thunk out to external native
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# code. For AArch64, we copy the VM stack into the main stack and then pop
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# the first 8 arguments off according to the AArch64 Procedure Call Standard
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# On return, we restore the stack pointer to its original location.
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#
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#****************************************************************************
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# UINTN EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
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ASM_GLOBAL ASM_PFX(EbcLLCALLEXNative);
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ASM_PFX(EbcLLCALLEXNative):
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stp x19, x20, [sp, #-16]!
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stp x29, x30, [sp, #-16]!
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mov x19, x0
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mov x20, sp
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sub x2, x2, x1 // Length = NewStackPointer-FramePtr
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sub sp, sp, x2
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sub sp, sp, #64 // Make sure there is room for at least 8 args in the new stack
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mov x0, sp
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bl CopyMem // Sp, NewStackPointer, Length
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ldp x0, x1, [sp], #16
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ldp x2, x3, [sp], #16
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ldp x4, x5, [sp], #16
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ldp x6, x7, [sp], #16
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blr x19
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mov sp, x20
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ldp x29, x30, [sp], #16
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ldp x19, x20, [sp], #16
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ret
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#****************************************************************************
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# EbcLLEbcInterpret
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#
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# This function is called by the thunk code to handle an Native to EBC call
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# This can handle up to 16 arguments (1-8 on in x0-x7, 9-16 are on the stack)
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# x9 contains the Entry point that will be the first argument when
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# EBCInterpret is called.
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#
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#****************************************************************************
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ASM_GLOBAL ASM_PFX(EbcLLEbcInterpret);
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ASM_PFX(EbcLLEbcInterpret):
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stp x29, x30, [sp, #-16]!
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// copy the current arguments 9-16 from old location and add arg 7 to stack
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// keeping 16 byte stack alignment
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sub sp, sp, #80
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str x7, [sp]
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ldr x11, [sp, #96]
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str x11, [sp, #8]
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ldr x11, [sp, #104]
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str x11, [sp, #16]
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ldr x11, [sp, #112]
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str x11, [sp, #24]
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ldr x11, [sp, #120]
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str x11, [sp, #32]
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ldr x11, [sp, #128]
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str x11, [sp, #40]
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ldr x11, [sp, #136]
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str x11, [sp, #48]
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ldr x11, [sp, #144]
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str x11, [sp, #56]
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ldr x11, [sp, #152]
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str x11, [sp, #64]
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// Shift arguments and add entry point and as argument 1
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mov x7, x6
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mov x6, x5
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mov x5, x4
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mov x4, x3
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mov x3, x2
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mov x2, x1
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mov x1, x0
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mov x0, x9
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# call C-code
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bl ASM_PFX(EbcInterpret)
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add sp, sp, #80
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ldp x29, x30, [sp], #16
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ret
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#****************************************************************************
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# EbcLLExecuteEbcImageEntryPoint
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#
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# This function is called by the thunk code to handle the image entry point
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# x9 contains the Entry point that will be the first argument when
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# ExecuteEbcImageEntryPoint is called.
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#
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#****************************************************************************
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ASM_GLOBAL ASM_PFX(EbcLLExecuteEbcImageEntryPoint);
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ASM_PFX(EbcLLExecuteEbcImageEntryPoint):
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stp x29, x30, [sp, #-16]!
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# build new paramater calling convention
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mov x2, x1
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mov x1, x0
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mov x0, x9
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# call C-code
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bl ASM_PFX(ExecuteEbcImageEntryPoint)
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ldp x29, x30, [sp], #16
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ret
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@ -0,0 +1,563 @@
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/** @file
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This module contains EBC support routines that are customized based on
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the target AArch64 processor.
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Copyright (c) 2015, The Linux Foundation. All rights reserved.
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Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
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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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#include "EbcInt.h"
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#include "EbcExecute.h"
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//
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// Amount of space that is not used in the stack
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//
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#define STACK_REMAIN_SIZE (1024 * 4)
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//
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// This is instruction buffer used to create EBC thunk
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//
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#define EBC_MAGIC_SIGNATURE 0xCA112EBCCA112EBCull
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#define EBC_ENTRYPOINT_SIGNATURE 0xAFAFAFAFAFAFAFAFull
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#define EBC_LL_EBC_ENTRYPOINT_SIGNATURE 0xFAFAFAFAFAFAFAFAull
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UINT8 mInstructionBufferTemplate[] = {
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0x03, 0x00, 0x00, 0x14, //b pc+16
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//
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// Add a magic code here to help the VM recognize the thunk..
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//
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(UINT8)(EBC_MAGIC_SIGNATURE & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 8) & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 16) & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 24) & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 32) & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 40) & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 48) & 0xFF),
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(UINT8)((EBC_MAGIC_SIGNATURE >> 56) & 0xFF),
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0x69, 0x00, 0x00, 0x58, //ldr x9, #32
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0x8A, 0x00, 0x00, 0x58, //ldr x10, #40
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0x05, 0x00, 0x00, 0x14, //b pc+32
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(UINT8)(EBC_ENTRYPOINT_SIGNATURE & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 32) & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 40) & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 48) & 0xFF),
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(UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 56) & 0xFF),
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(UINT8)(EBC_LL_EBC_ENTRYPOINT_SIGNATURE & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 32) & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 40) & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 48) & 0xFF),
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(UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 56) & 0xFF),
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0x40, 0x01, 0x1F, 0xD6 //br x10
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};
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/**
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Begin executing an EBC image.
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This is used for Ebc Thunk call.
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@return The value returned by the EBC application we're going to run.
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**/
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UINT64
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EFIAPI
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EbcLLEbcInterpret (
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VOID
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);
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/**
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Begin executing an EBC image.
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This is used for Ebc image entrypoint.
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@return The value returned by the EBC application we're going to run.
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**/
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UINT64
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EFIAPI
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EbcLLExecuteEbcImageEntryPoint (
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VOID
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);
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/**
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Pushes a 64 bit unsigned value to the VM stack.
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@param VmPtr The pointer to current VM context.
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@param Arg The value to be pushed.
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**/
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VOID
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PushU64 (
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IN VM_CONTEXT *VmPtr,
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IN UINT64 Arg
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)
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{
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//
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// Advance the VM stack down, and then copy the argument to the stack.
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// Hope it's aligned.
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//
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VmPtr->Gpr[0] -= sizeof (UINT64);
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*(UINT64 *) VmPtr->Gpr[0] = Arg;
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return;
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}
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/**
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Begin executing an EBC image.
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This is a thunk function.
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@param EntryPoint The entrypoint of EBC code.
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@param Arg1 The 1st argument.
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@param Arg2 The 2nd argument.
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@param Arg3 The 3rd argument.
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@param Arg4 The 4th argument.
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@param Arg5 The 5th argument.
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@param Arg6 The 6th argument.
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@param Arg7 The 7th argument.
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@param Arg8 The 8th argument.
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@param Arg9 The 9th argument.
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@param Arg10 The 10th argument.
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@param Arg11 The 11th argument.
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@param Arg12 The 12th argument.
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@param Arg13 The 13th argument.
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@param Arg14 The 14th argument.
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@param Arg15 The 15th argument.
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@param Arg16 The 16th argument.
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@return The value returned by the EBC application we're going to run.
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**/
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UINT64
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EFIAPI
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EbcInterpret (
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IN UINTN EntryPoint,
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IN UINTN Arg1,
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IN UINTN Arg2,
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IN UINTN Arg3,
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IN UINTN Arg4,
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IN UINTN Arg5,
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IN UINTN Arg6,
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IN UINTN Arg7,
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IN UINTN Arg8,
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IN UINTN Arg9,
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IN UINTN Arg10,
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IN UINTN Arg11,
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IN UINTN Arg12,
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IN UINTN Arg13,
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IN UINTN Arg14,
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IN UINTN Arg15,
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IN UINTN Arg16
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)
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{
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//
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// Create a new VM context on the stack
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//
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VM_CONTEXT VmContext;
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UINTN Addr;
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EFI_STATUS Status;
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UINTN StackIndex;
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//
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// Get the EBC entry point
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//
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Addr = EntryPoint;
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//
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// Now clear out our context
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//
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ZeroMem ((VOID *) &VmContext, sizeof (VM_CONTEXT));
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//
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// Set the VM instruction pointer to the correct location in memory.
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//
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VmContext.Ip = (VMIP) Addr;
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//
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// Initialize the stack pointer for the EBC. Get the current system stack
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// pointer and adjust it down by the max needed for the interpreter.
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//
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//
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// Adjust the VM's stack pointer down.
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//
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Status = GetEBCStack((EFI_HANDLE)(UINTN)-1, &VmContext.StackPool, &StackIndex);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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VmContext.StackTop = (UINT8*)VmContext.StackPool + (STACK_REMAIN_SIZE);
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VmContext.Gpr[0] = (UINT64) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);
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VmContext.HighStackBottom = (UINTN) VmContext.Gpr[0];
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VmContext.Gpr[0] -= sizeof (UINTN);
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//
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// Align the stack on a natural boundary.
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//
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VmContext.Gpr[0] &= ~(VM_REGISTER)(sizeof (UINTN) - 1);
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//
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// Put a magic value in the stack gap, then adjust down again.
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//
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*(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) VM_STACK_KEY_VALUE;
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VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.Gpr[0];
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//
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// The stack upper to LowStackTop is belong to the VM.
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//
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VmContext.LowStackTop = (UINTN) VmContext.Gpr[0];
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//
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// For the worst case, assume there are 4 arguments passed in registers, store
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// them to VM's stack.
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//
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PushU64 (&VmContext, (UINT64) Arg16);
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PushU64 (&VmContext, (UINT64) Arg15);
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PushU64 (&VmContext, (UINT64) Arg14);
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PushU64 (&VmContext, (UINT64) Arg13);
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PushU64 (&VmContext, (UINT64) Arg12);
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PushU64 (&VmContext, (UINT64) Arg11);
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PushU64 (&VmContext, (UINT64) Arg10);
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PushU64 (&VmContext, (UINT64) Arg9);
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PushU64 (&VmContext, (UINT64) Arg8);
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PushU64 (&VmContext, (UINT64) Arg7);
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||||||
|
PushU64 (&VmContext, (UINT64) Arg6);
|
||||||
|
PushU64 (&VmContext, (UINT64) Arg5);
|
||||||
|
PushU64 (&VmContext, (UINT64) Arg4);
|
||||||
|
PushU64 (&VmContext, (UINT64) Arg3);
|
||||||
|
PushU64 (&VmContext, (UINT64) Arg2);
|
||||||
|
PushU64 (&VmContext, (UINT64) Arg1);
|
||||||
|
|
||||||
|
//
|
||||||
|
// Interpreter assumes 64-bit return address is pushed on the stack.
|
||||||
|
// AArch64 does not do this so pad the stack accordingly.
|
||||||
|
//
|
||||||
|
PushU64 (&VmContext, (UINT64) 0);
|
||||||
|
PushU64 (&VmContext, (UINT64) 0x1234567887654321ULL);
|
||||||
|
|
||||||
|
//
|
||||||
|
// For AArch64, this is where we say our return address is
|
||||||
|
//
|
||||||
|
VmContext.StackRetAddr = (UINT64) VmContext.Gpr[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.Gpr[7];
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
Begin executing an EBC image.
|
||||||
|
|
||||||
|
@param EntryPoint The entrypoint of EBC code.
|
||||||
|
@param ImageHandle image handle for the EBC application we're executing
|
||||||
|
@param SystemTable standard system table passed into an driver's entry
|
||||||
|
point
|
||||||
|
|
||||||
|
@return The value returned by the EBC application we're going to run.
|
||||||
|
|
||||||
|
**/
|
||||||
|
UINT64
|
||||||
|
EFIAPI
|
||||||
|
ExecuteEbcImageEntryPoint (
|
||||||
|
IN UINTN EntryPoint,
|
||||||
|
IN EFI_HANDLE ImageHandle,
|
||||||
|
IN EFI_SYSTEM_TABLE *SystemTable
|
||||||
|
)
|
||||||
|
{
|
||||||
|
//
|
||||||
|
// Create a new VM context on the stack
|
||||||
|
//
|
||||||
|
VM_CONTEXT VmContext;
|
||||||
|
UINTN Addr;
|
||||||
|
EFI_STATUS Status;
|
||||||
|
UINTN StackIndex;
|
||||||
|
|
||||||
|
//
|
||||||
|
// Get the EBC entry point
|
||||||
|
//
|
||||||
|
Addr = EntryPoint;
|
||||||
|
|
||||||
|
//
|
||||||
|
// 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.
|
||||||
|
//
|
||||||
|
|
||||||
|
Status = GetEBCStack(ImageHandle, &VmContext.StackPool, &StackIndex);
|
||||||
|
if (EFI_ERROR(Status)) {
|
||||||
|
return Status;
|
||||||
|
}
|
||||||
|
VmContext.StackTop = (UINT8*)VmContext.StackPool + (STACK_REMAIN_SIZE);
|
||||||
|
VmContext.Gpr[0] = (UINT64) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);
|
||||||
|
VmContext.HighStackBottom = (UINTN) VmContext.Gpr[0];
|
||||||
|
VmContext.Gpr[0] -= sizeof (UINTN);
|
||||||
|
|
||||||
|
|
||||||
|
//
|
||||||
|
// Put a magic value in the stack gap, then adjust down again
|
||||||
|
//
|
||||||
|
*(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) VM_STACK_KEY_VALUE;
|
||||||
|
VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.Gpr[0];
|
||||||
|
|
||||||
|
//
|
||||||
|
// Align the stack on a natural boundary
|
||||||
|
VmContext.Gpr[0] &= ~(VM_REGISTER)(sizeof(UINTN) - 1);
|
||||||
|
//
|
||||||
|
VmContext.LowStackTop = (UINTN) VmContext.Gpr[0];
|
||||||
|
|
||||||
|
//
|
||||||
|
// Simply copy the image handle and system table onto the EBC stack.
|
||||||
|
// Greatly simplifies things by not having to spill the args.
|
||||||
|
//
|
||||||
|
PushU64 (&VmContext, (UINT64) SystemTable);
|
||||||
|
PushU64 (&VmContext, (UINT64) ImageHandle);
|
||||||
|
|
||||||
|
//
|
||||||
|
// VM pushes 16-bytes for return address. Simulate that here.
|
||||||
|
//
|
||||||
|
PushU64 (&VmContext, (UINT64) 0);
|
||||||
|
PushU64 (&VmContext, (UINT64) 0x1234567887654321ULL);
|
||||||
|
|
||||||
|
//
|
||||||
|
// For AArch64, this is where we say our return address is
|
||||||
|
//
|
||||||
|
VmContext.StackRetAddr = (UINT64) VmContext.Gpr[0];
|
||||||
|
|
||||||
|
//
|
||||||
|
// Entry function needn't access high stack context, simply
|
||||||
|
// put the stack pointer here.
|
||||||
|
//
|
||||||
|
|
||||||
|
//
|
||||||
|
// Begin executing the EBC code
|
||||||
|
//
|
||||||
|
EbcExecute (&VmContext);
|
||||||
|
|
||||||
|
//
|
||||||
|
// Return the value in R[7] unless there was an error
|
||||||
|
//
|
||||||
|
ReturnEBCStack(StackIndex);
|
||||||
|
return (UINT64) VmContext.Gpr[7];
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
Create thunks for an EBC image entry point, or an EBC protocol service.
|
||||||
|
|
||||||
|
@param ImageHandle Image handle for the EBC image. If not null, then
|
||||||
|
we're creating a thunk for an image entry point.
|
||||||
|
@param EbcEntryPoint Address of the EBC code that the thunk is to call
|
||||||
|
@param Thunk Returned thunk we create here
|
||||||
|
@param Flags Flags indicating options for creating the thunk
|
||||||
|
|
||||||
|
@retval EFI_SUCCESS The thunk was created successfully.
|
||||||
|
@retval EFI_INVALID_PARAMETER The parameter of EbcEntryPoint is not 16-bit
|
||||||
|
aligned.
|
||||||
|
@retval EFI_OUT_OF_RESOURCES There is not enough memory to created the EBC
|
||||||
|
Thunk.
|
||||||
|
@retval EFI_BUFFER_TOO_SMALL EBC_THUNK_SIZE is not larger enough.
|
||||||
|
|
||||||
|
**/
|
||||||
|
EFI_STATUS
|
||||||
|
EbcCreateThunks (
|
||||||
|
IN EFI_HANDLE ImageHandle,
|
||||||
|
IN VOID *EbcEntryPoint,
|
||||||
|
OUT VOID **Thunk,
|
||||||
|
IN UINT32 Flags
|
||||||
|
)
|
||||||
|
{
|
||||||
|
UINT8 *Ptr;
|
||||||
|
UINT8 *ThunkBase;
|
||||||
|
UINT32 Index;
|
||||||
|
INT32 ThunkSize;
|
||||||
|
|
||||||
|
//
|
||||||
|
// Check alignment of pointer to EBC code
|
||||||
|
//
|
||||||
|
if ((UINT32) (UINTN) EbcEntryPoint & 0x01) {
|
||||||
|
return EFI_INVALID_PARAMETER;
|
||||||
|
}
|
||||||
|
|
||||||
|
ThunkSize = sizeof(mInstructionBufferTemplate);
|
||||||
|
|
||||||
|
Ptr = AllocatePool (sizeof(mInstructionBufferTemplate));
|
||||||
|
|
||||||
|
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;
|
||||||
|
|
||||||
|
//
|
||||||
|
// Copy whole thunk instruction buffer template
|
||||||
|
//
|
||||||
|
CopyMem (Ptr, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate));
|
||||||
|
|
||||||
|
//
|
||||||
|
// Patch EbcEntryPoint and EbcLLEbcInterpret
|
||||||
|
//
|
||||||
|
for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {
|
||||||
|
if (*(UINTN *)&Ptr[Index] == EBC_ENTRYPOINT_SIGNATURE) {
|
||||||
|
*(UINTN *)&Ptr[Index] = (UINTN)EbcEntryPoint;
|
||||||
|
}
|
||||||
|
if (*(UINTN *)&Ptr[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {
|
||||||
|
if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {
|
||||||
|
*(UINTN *)&Ptr[Index] = (UINTN)EbcLLExecuteEbcImageEntryPoint;
|
||||||
|
} else {
|
||||||
|
*(UINTN *)&Ptr[Index] = (UINTN)EbcLLEbcInterpret;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
//
|
||||||
|
// 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;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
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.
|
||||||
|
|
||||||
|
@param VmPtr Pointer to a VM context.
|
||||||
|
@param FuncAddr Callee's address
|
||||||
|
@param NewStackPointer New stack pointer after the call
|
||||||
|
@param FramePtr New frame pointer after the call
|
||||||
|
@param Size The size of call instruction
|
||||||
|
|
||||||
|
**/
|
||||||
|
VOID
|
||||||
|
EbcLLCALLEX (
|
||||||
|
IN VM_CONTEXT *VmPtr,
|
||||||
|
IN UINTN FuncAddr,
|
||||||
|
IN UINTN NewStackPointer,
|
||||||
|
IN VOID *FramePtr,
|
||||||
|
IN UINT8 Size
|
||||||
|
)
|
||||||
|
{
|
||||||
|
UINTN IsThunk;
|
||||||
|
UINTN TargetEbcAddr;
|
||||||
|
UINT8 InstructionBuffer[sizeof(mInstructionBufferTemplate)];
|
||||||
|
UINTN Index;
|
||||||
|
UINTN IndexOfEbcEntrypoint;
|
||||||
|
|
||||||
|
IsThunk = 1;
|
||||||
|
TargetEbcAddr = 0;
|
||||||
|
IndexOfEbcEntrypoint = 0;
|
||||||
|
|
||||||
|
//
|
||||||
|
// Processor specific code to check whether the callee is a thunk to EBC.
|
||||||
|
//
|
||||||
|
CopyMem (InstructionBuffer, (VOID *)FuncAddr, sizeof(InstructionBuffer));
|
||||||
|
//
|
||||||
|
// Fill the signature according to mInstructionBufferTemplate
|
||||||
|
//
|
||||||
|
for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {
|
||||||
|
if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_ENTRYPOINT_SIGNATURE) {
|
||||||
|
*(UINTN *)&InstructionBuffer[Index] = EBC_ENTRYPOINT_SIGNATURE;
|
||||||
|
IndexOfEbcEntrypoint = Index;
|
||||||
|
}
|
||||||
|
if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {
|
||||||
|
*(UINTN *)&InstructionBuffer[Index] = EBC_LL_EBC_ENTRYPOINT_SIGNATURE;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
//
|
||||||
|
// Check if we need thunk to native
|
||||||
|
//
|
||||||
|
if (CompareMem (InstructionBuffer, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate)) != 0) {
|
||||||
|
IsThunk = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
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->Gpr[0] -= 8;
|
||||||
|
VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], (UINTN) FramePtr);
|
||||||
|
VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->Gpr[0];
|
||||||
|
VmPtr->Gpr[0] -= 8;
|
||||||
|
VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));
|
||||||
|
|
||||||
|
CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + IndexOfEbcEntrypoint, sizeof(UINTN));
|
||||||
|
VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;
|
||||||
|
} else {
|
||||||
|
//
|
||||||
|
// The callee is not a thunk to EBC, call native code,
|
||||||
|
// and get return value.
|
||||||
|
//
|
||||||
|
VmPtr->Gpr[7] = EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);
|
||||||
|
|
||||||
|
//
|
||||||
|
// Advance the IP.
|
||||||
|
//
|
||||||
|
VmPtr->Ip += Size;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
@ -5,6 +5,7 @@
|
||||||
# platform and processor-independent mechanisms for loading and executing EFI
|
# platform and processor-independent mechanisms for loading and executing EFI
|
||||||
# device drivers.
|
# device drivers.
|
||||||
#
|
#
|
||||||
|
# Copyright (c) 2015, The Linux Foundation. All rights reserved.
|
||||||
# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
|
# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
|
||||||
# This program and the accompanying materials
|
# This program and the accompanying materials
|
||||||
# are licensed and made available under the terms and conditions of the BSD License
|
# are licensed and made available under the terms and conditions of the BSD License
|
||||||
|
|
@ -28,7 +29,7 @@
|
||||||
#
|
#
|
||||||
# The following information is for reference only and not required by the build tools.
|
# The following information is for reference only and not required by the build tools.
|
||||||
#
|
#
|
||||||
# VALID_ARCHITECTURES = IA32 X64 IPF
|
# VALID_ARCHITECTURES = IA32 X64 IPF AARCH64
|
||||||
#
|
#
|
||||||
|
|
||||||
[Sources]
|
[Sources]
|
||||||
|
|
@ -54,6 +55,9 @@
|
||||||
Ipf/EbcSupport.c
|
Ipf/EbcSupport.c
|
||||||
Ipf/EbcLowLevel.s
|
Ipf/EbcLowLevel.s
|
||||||
|
|
||||||
|
[Sources.AARCH64]
|
||||||
|
AArch64/EbcSupport.c
|
||||||
|
AArch64/EbcLowLevel.S
|
||||||
|
|
||||||
[Packages]
|
[Packages]
|
||||||
MdePkg/MdePkg.dec
|
MdePkg/MdePkg.dec
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue