mirror of https://github.com/acidanthera/audk.git
Re-org the EBC thunk code for better code maintenance.
signed-off-by: jyao1 reviewed-by: lgao4 git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12769 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jyao1
parent
6cf9230ff2
commit
21d13c6156
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@ -1,6 +1,6 @@
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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 processor.
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the target ia32 processor.
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Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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@ -23,10 +23,47 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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// platform-specific configurations.
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//
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#define VM_STACK_SIZE (1024 * 4)
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#define EBC_THUNK_SIZE 32
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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_ENTRYPOINT_SIGNATURE 0xAFAFAFAF
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#define EBC_LL_EBC_ENTRYPOINT_SIGNATURE 0xFAFAFAFA
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UINT8 mInstructionBufferTemplate[] = {
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//
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// Add a magic code here to help the VM recognize the thunk..
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// mov eax, 0xca112ebc => B8 BC 2E 11 CA
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//
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0xB8, 0xBC, 0x2E, 0x11, 0xCA,
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//
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// Add code bytes to load up a processor register with the EBC entry point.
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// mov eax, EbcEntryPoint => B8 XX XX XX XX (To be fixed at runtime)
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// These 4 bytes of the thunk entry is the address of the EBC
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// entry point.
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//
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0xB8,
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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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//
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// Stick in a load of ecx with the address of appropriate VM function.
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// mov ecx, EbcLLEbcInterpret => B9 XX XX XX XX (To be fixed at runtime)
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//
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0xB9,
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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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//
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// Stick in jump opcode bytes
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// jmp ecx => FF E1
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//
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0xFF, 0xE1,
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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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@ -79,54 +116,37 @@ EbcLLCALLEX (
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{
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UINTN IsThunk;
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UINTN TargetEbcAddr;
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UINT8 InstructionBuffer[sizeof(mInstructionBufferTemplate)];
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UINTN Index;
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UINTN IndexOfEbcEntrypoint;
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IsThunk = 1;
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TargetEbcAddr = 0;
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IndexOfEbcEntrypoint = 0;
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//
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// Processor specific code to check whether the callee is a thunk to EBC.
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//
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if (*((UINT8 *)FuncAddr) != 0xB8) {
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IsThunk = 0;
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goto Action;
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CopyMem (InstructionBuffer, (VOID *)FuncAddr, sizeof(InstructionBuffer));
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//
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// Fill the signature according to mInstructionBufferTemplate
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//
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for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {
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if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_ENTRYPOINT_SIGNATURE) {
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*(UINTN *)&InstructionBuffer[Index] = EBC_ENTRYPOINT_SIGNATURE;
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IndexOfEbcEntrypoint = Index;
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}
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if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {
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*(UINTN *)&InstructionBuffer[Index] = EBC_LL_EBC_ENTRYPOINT_SIGNATURE;
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}
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}
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if (*((UINT8 *)FuncAddr + 1) != 0xBC) {
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//
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// Check if we need thunk to native
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//
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if (CompareMem (InstructionBuffer, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate)) != 0) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 2) != 0x2E) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 3) != 0x11) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 4) != 0xCA) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 5) != 0xB8) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 10) != 0xB9) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 15) != 0xFF) {
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IsThunk = 0;
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goto Action;
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}
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if (*((UINT8 *)FuncAddr + 16) != 0xE1) {
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IsThunk = 0;
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goto Action;
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}
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TargetEbcAddr = ((UINTN)(*((UINT8 *)FuncAddr + 9)) << 24) + ((UINTN)(*((UINT8 *)FuncAddr + 8)) << 16) +
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((UINTN)(*((UINT8 *)FuncAddr + 7)) << 8) + ((UINTN)(*((UINT8 *)FuncAddr + 6)));
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Action:
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if (IsThunk == 1){
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//
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// The callee is a thunk to EBC, adjust the stack pointer down 16 bytes and
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@ -139,11 +159,12 @@ Action:
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VmPtr->Gpr[0] -= 8;
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VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));
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CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + IndexOfEbcEntrypoint, sizeof(UINTN));
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VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;
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} else {
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//
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// The callee is not a thunk to EBC, call native code,
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// and get return value
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// and get return value.
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//
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VmPtr->Gpr[7] = EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);
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@ -449,8 +470,6 @@ EbcCreateThunks (
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UINT8 *Ptr;
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UINT8 *ThunkBase;
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UINT32 Index;
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UINT32 Addr;
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INT32 Size;
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INT32 ThunkSize;
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//
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@ -460,10 +479,9 @@ EbcCreateThunks (
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return EFI_INVALID_PARAMETER;
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}
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Size = EBC_THUNK_SIZE;
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ThunkSize = Size;
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ThunkSize = sizeof(mInstructionBufferTemplate);
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Ptr = AllocatePool (Size);
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Ptr = AllocatePool (sizeof(mInstructionBufferTemplate));
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if (Ptr == NULL) {
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return EFI_OUT_OF_RESOURCES;
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@ -481,74 +499,26 @@ EbcCreateThunks (
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*Thunk = (VOID *) Ptr;
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//
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// Add a magic code here to help the VM recognize the thunk..
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// mov eax, 0xca112ebc => B8 BC 2E 11 CA
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// Copy whole thunk instruction buffer template
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//
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*Ptr = 0xB8;
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Ptr++;
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Size--;
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Addr = (UINT32) 0xCA112EBC;
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for (Index = 0; Index < sizeof (Addr); Index++) {
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*Ptr = (UINT8) (UINTN) Addr;
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Addr >>= 8;
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Ptr++;
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Size--;
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}
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CopyMem (Ptr, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate));
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//
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// Add code bytes to load up a processor register with the EBC entry point.
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// mov eax, 0xaa55aa55 => B8 55 AA 55 AA
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// The first 8 bytes of the thunk entry is the address of the EBC
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// entry point.
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// Patch EbcEntryPoint and EbcLLEbcInterpret
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//
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*Ptr = 0xB8;
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Ptr++;
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Size--;
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Addr = (UINT32) EbcEntryPoint;
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for (Index = 0; Index < sizeof (Addr); Index++) {
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*Ptr = (UINT8) (UINTN) Addr;
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Addr >>= 8;
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Ptr++;
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Size--;
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}
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//
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// Stick in a load of ecx with the address of appropriate VM function.
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// mov ecx 12345678h => 0xB9 0x78 0x56 0x34 0x12
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//
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if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {
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Addr = (UINT32) (UINTN) EbcLLExecuteEbcImageEntryPoint;
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} else {
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Addr = (UINT32) (UINTN) EbcLLEbcInterpret;
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for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {
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if (*(UINTN *)&Ptr[Index] == EBC_ENTRYPOINT_SIGNATURE) {
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*(UINTN *)&Ptr[Index] = (UINTN)EbcEntryPoint;
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}
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if (*(UINTN *)&Ptr[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {
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if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {
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*(UINTN *)&Ptr[Index] = (UINTN)EbcLLExecuteEbcImageEntryPoint;
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} else {
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*(UINTN *)&Ptr[Index] = (UINTN)EbcLLEbcInterpret;
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}
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}
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}
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//
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// MOV ecx
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//
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*Ptr = 0xB9;
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Ptr++;
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Size--;
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for (Index = 0; Index < sizeof (Addr); Index++) {
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*Ptr = (UINT8) Addr;
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Addr >>= 8;
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Ptr++;
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Size--;
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}
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//
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// Stick in jump opcode bytes for jmp ecx => 0xFF 0xE1
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//
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*Ptr = 0xFF;
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Ptr++;
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Size--;
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*Ptr = 0xE1;
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Size--;
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//
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// Double check that our defined size is ok (application error)
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//
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if (Size < 0) {
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ASSERT (FALSE);
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return EFI_BUFFER_TOO_SMALL;
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}
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//
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// Add the thunk to the list for this image. Do this last since the add
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// function flushes the cache for us.
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@ -23,10 +23,55 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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// platform-specific configurations.
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//
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#define VM_STACK_SIZE (1024 * 8)
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#define EBC_THUNK_SIZE 64
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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_ENTRYPOINT_SIGNATURE 0xAFAFAFAFAFAFAFAFull
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#define EBC_LL_EBC_ENTRYPOINT_SIGNATURE 0xFAFAFAFAFAFAFAFAull
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UINT8 mInstructionBufferTemplate[] = {
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//
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// Add a magic code here to help the VM recognize the thunk..
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// mov rax, 0xca112ebcca112ebc => 48 B8 BC 2E 11 CA BC 2E 11 CA
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//
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0x48, 0xB8, 0xBC, 0x2E, 0x11, 0xCA, 0xBC, 0x2E, 0x11, 0xCA,
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//
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// Add code bytes to load up a processor register with the EBC entry point.
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// mov r10, EbcEntryPoint => 49 BA XX XX XX XX XX XX XX XX (To be fixed at runtime)
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// These 8 bytes of the thunk entry is the address of the EBC
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// entry point.
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//
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0x49, 0xBA,
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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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//
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// Stick in a load of r11 with the address of appropriate VM function.
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// mov r11, EbcLLEbcInterpret => 49 BB XX XX XX XX XX XX XX XX (To be fixed at runtime)
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//
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0x49, 0xBB,
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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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//
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// Stick in jump opcode bytes
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// jmp r11 => 41 FF E3
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//
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0x41, 0xFF, 0xE3,
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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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@ -382,8 +427,6 @@ EbcCreateThunks (
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UINT8 *Ptr;
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UINT8 *ThunkBase;
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UINT32 Index;
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UINT64 Addr;
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INT32 Size;
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INT32 ThunkSize;
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//
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@ -393,10 +436,9 @@ EbcCreateThunks (
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return EFI_INVALID_PARAMETER;
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}
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Size = EBC_THUNK_SIZE;
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ThunkSize = Size;
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ThunkSize = sizeof(mInstructionBufferTemplate);
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Ptr = AllocatePool (Size);
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Ptr = AllocatePool (sizeof(mInstructionBufferTemplate));
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if (Ptr == NULL) {
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return EFI_OUT_OF_RESOURCES;
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@ -414,89 +456,26 @@ EbcCreateThunks (
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*Thunk = (VOID *) Ptr;
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//
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// Add a magic code here to help the VM recognize the thunk..
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// mov rax, ca112ebccall2ebch => 48 B8 BC 2E 11 CA BC 2E 11 CA
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// Copy whole thunk instruction buffer template
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//
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*Ptr = 0x48;
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Ptr++;
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Size--;
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*Ptr = 0xB8;
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Ptr++;
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Size--;
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Addr = (UINT64) 0xCA112EBCCA112EBCULL;
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for (Index = 0; Index < sizeof (Addr); Index++) {
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*Ptr = (UINT8) (UINTN) Addr;
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Addr >>= 8;
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Ptr++;
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Size--;
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}
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CopyMem (Ptr, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate));
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//
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// Add code bytes to load up a processor register with the EBC entry point.
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// mov r10, 123456789abcdef0h => 49 BA F0 DE BC 9A 78 56 34 12
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// The first 8 bytes of the thunk entry is the address of the EBC
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// entry point.
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// Patch EbcEntryPoint and EbcLLEbcInterpret
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//
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*Ptr = 0x49;
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Ptr++;
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Size--;
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*Ptr = 0xBA;
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Ptr++;
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Size--;
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Addr = (UINT64) EbcEntryPoint;
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for (Index = 0; Index < sizeof (Addr); Index++) {
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*Ptr = (UINT8) (UINTN) Addr;
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Addr >>= 8;
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Ptr++;
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Size--;
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for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {
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if (*(UINTN *)&Ptr[Index] == EBC_ENTRYPOINT_SIGNATURE) {
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*(UINTN *)&Ptr[Index] = (UINTN)EbcEntryPoint;
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}
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if (*(UINTN *)&Ptr[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {
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if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {
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*(UINTN *)&Ptr[Index] = (UINTN)EbcLLExecuteEbcImageEntryPoint;
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} else {
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*(UINTN *)&Ptr[Index] = (UINTN)EbcLLEbcInterpret;
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}
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}
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}
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//
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// Stick in a load of ecx with the address of appropriate VM function.
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// Using r11 because it's a volatile register and won't be used in this
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// point.
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// mov r11 123456789abcdef0h => 49 BB F0 DE BC 9A 78 56 34 12
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//
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if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {
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Addr = (UINTN) EbcLLExecuteEbcImageEntryPoint;
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} else {
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Addr = (UINTN) EbcLLEbcInterpret;
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}
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//
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// mov r11 Addr => 0x49 0xBB
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//
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*Ptr = 0x49;
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Ptr++;
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Size--;
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*Ptr = 0xBB;
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Ptr++;
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Size--;
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for (Index = 0; Index < sizeof (Addr); Index++) {
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*Ptr = (UINT8) Addr;
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Addr >>= 8;
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Ptr++;
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Size--;
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}
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//
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// Stick in jump opcode bytes for jmp r11 => 0x41 0xFF 0xE3
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//
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*Ptr = 0x41;
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Ptr++;
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Size--;
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*Ptr = 0xFF;
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Ptr++;
|
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Size--;
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*Ptr = 0xE3;
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Size--;
|
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//
|
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// Double check that our defined size is ok (application error)
|
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//
|
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if (Size < 0) {
|
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ASSERT (FALSE);
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return EFI_BUFFER_TOO_SMALL;
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}
|
||||
//
|
||||
// Add the thunk to the list for this image. Do this last since the add
|
||||
// function flushes the cache for us.
|
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|
|
@ -533,65 +512,37 @@ EbcLLCALLEX (
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{
|
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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.
|
||||
//
|
||||
if (*((UINT8 *)FuncAddr) != 0x48) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
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;
|
||||
}
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 1) != 0xB8) {
|
||||
//
|
||||
// Check if we need thunk to native
|
||||
//
|
||||
if (CompareMem (InstructionBuffer, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate)) != 0) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 2) != 0xBC) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 3) != 0x2E) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 4) != 0x11) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 5) != 0xCA) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 6) != 0xBC) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 7) != 0x2E) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 8) != 0x11) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 9) != 0xCA) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 10) != 0x49) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
if (*((UINT8 *)FuncAddr + 11) != 0xBA) {
|
||||
IsThunk = 0;
|
||||
goto Action;
|
||||
}
|
||||
|
||||
CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + 12, 8);
|
||||
|
||||
Action:
|
||||
if (IsThunk == 1){
|
||||
//
|
||||
// The callee is a thunk to EBC, adjust the stack pointer down 16 bytes and
|
||||
|
|
@ -602,8 +553,9 @@ Action:
|
|||
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) (VmPtr->Ip + Size));
|
||||
VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));
|
||||
|
||||
CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + IndexOfEbcEntrypoint, sizeof(UINTN));
|
||||
VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;
|
||||
} else {
|
||||
//
|
||||
|
|
|
|||
Loading…
Reference in New Issue