/** @file\r
This module contains EBC support routines that are customized based on\r
- the target processor.\r
+ the target ia32 processor.\r
\r
-Copyright (c) 2006, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
#include "EbcInt.h"\r
#include "EbcExecute.h"\r
+#include "EbcDebuggerHook.h"\r
\r
//\r
// NOTE: This is the stack size allocated for the interpreter\r
// platform-specific configurations.\r
//\r
#define VM_STACK_SIZE (1024 * 4)\r
-#define EBC_THUNK_SIZE 32\r
\r
#define STACK_REMAIN_SIZE (1024 * 4)\r
\r
+//\r
+// This is instruction buffer used to create EBC thunk\r
+//\r
+#define EBC_ENTRYPOINT_SIGNATURE 0xAFAFAFAF\r
+#define EBC_LL_EBC_ENTRYPOINT_SIGNATURE 0xFAFAFAFA\r
+UINT8 mInstructionBufferTemplate[] = {\r
+ //\r
+ // Add a magic code here to help the VM recognize the thunk..\r
+ // mov eax, 0xca112ebc => B8 BC 2E 11 CA\r
+ //\r
+ 0xB8, 0xBC, 0x2E, 0x11, 0xCA,\r
+ //\r
+ // Add code bytes to load up a processor register with the EBC entry point.\r
+ // mov eax, EbcEntryPoint => B8 XX XX XX XX (To be fixed at runtime)\r
+ // These 4 bytes of the thunk entry is the address of the EBC\r
+ // entry point.\r
+ //\r
+ 0xB8,\r
+ (UINT8)(EBC_ENTRYPOINT_SIGNATURE & 0xFF),\r
+ (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),\r
+ (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),\r
+ (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),\r
+ //\r
+ // Stick in a load of ecx with the address of appropriate VM function.\r
+ // mov ecx, EbcLLEbcInterpret => B9 XX XX XX XX (To be fixed at runtime)\r
+ //\r
+ 0xB9,\r
+ (UINT8)(EBC_LL_EBC_ENTRYPOINT_SIGNATURE & 0xFF),\r
+ (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),\r
+ (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),\r
+ (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),\r
+ //\r
+ // Stick in jump opcode bytes\r
+ // jmp ecx => FF E1\r
+ //\r
+ 0xFF, 0xE1,\r
+};\r
+\r
+/**\r
+ Begin executing an EBC image.\r
+ This is used for Ebc Thunk call.\r
+\r
+ @return The value returned by the EBC application we're going to run.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+EbcLLEbcInterpret (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Begin executing an EBC image.\r
+ This is used for Ebc image entrypoint.\r
+\r
+ @return The value returned by the EBC application we're going to run.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+EbcLLExecuteEbcImageEntryPoint (\r
+ VOID\r
+ );\r
\r
/**\r
This function is called to execute an EBC CALLEX instruction.\r
otherwise, set the VM->IP to target EBC code directly to avoid another VM\r
be startup which cost time and stack space.\r
\r
- @parm VmPtr Pointer to a VM context.\r
- @parm FuncAddr Callee's address\r
- @parm NewStackPointer New stack pointer after the call\r
- @parm FramePtr New frame pointer after the call\r
- @parm Size The size of call instruction\r
-\r
- @return None.\r
+ @param VmPtr Pointer to a VM context.\r
+ @param FuncAddr Callee's address\r
+ @param NewStackPointer New stack pointer after the call\r
+ @param FramePtr New frame pointer after the call\r
+ @param Size The size of call instruction\r
\r
**/\r
VOID\r
{\r
UINTN IsThunk;\r
UINTN TargetEbcAddr;\r
+ UINT8 InstructionBuffer[sizeof(mInstructionBufferTemplate)];\r
+ UINTN Index;\r
+ UINTN IndexOfEbcEntrypoint;\r
\r
IsThunk = 1;\r
TargetEbcAddr = 0;\r
+ IndexOfEbcEntrypoint = 0;\r
\r
//\r
// Processor specific code to check whether the callee is a thunk to EBC.\r
//\r
- if (*((UINT8 *)FuncAddr) != 0xB8) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 1) != 0xBC) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 2) != 0x2E) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 3) != 0x11) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 4) != 0xCA) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 5) != 0xB8) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 10) != 0xB9) {\r
- IsThunk = 0;\r
- goto Action;\r
- }\r
- if (*((UINT8 *)FuncAddr + 15) != 0xFF) {\r
- IsThunk = 0;\r
- goto Action;\r
+ CopyMem (InstructionBuffer, (VOID *)FuncAddr, sizeof(InstructionBuffer));\r
+ //\r
+ // Fill the signature according to mInstructionBufferTemplate\r
+ //\r
+ for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {\r
+ if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_ENTRYPOINT_SIGNATURE) {\r
+ *(UINTN *)&InstructionBuffer[Index] = EBC_ENTRYPOINT_SIGNATURE;\r
+ IndexOfEbcEntrypoint = Index;\r
+ }\r
+ if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {\r
+ *(UINTN *)&InstructionBuffer[Index] = EBC_LL_EBC_ENTRYPOINT_SIGNATURE;\r
+ }\r
}\r
- if (*((UINT8 *)FuncAddr + 16) != 0xE1) {\r
+ //\r
+ // Check if we need thunk to native\r
+ //\r
+ if (CompareMem (InstructionBuffer, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate)) != 0) {\r
IsThunk = 0;\r
- goto Action;\r
}\r
\r
- TargetEbcAddr = ((UINTN)(*((UINT8 *)FuncAddr + 9)) << 24) + ((UINTN)(*((UINT8 *)FuncAddr + 8)) << 16) +\r
- ((UINTN)(*((UINT8 *)FuncAddr + 7)) << 8) + ((UINTN)(*((UINT8 *)FuncAddr + 6)));\r
-\r
-Action:\r
if (IsThunk == 1){\r
//\r
// The callee is a thunk to EBC, adjust the stack pointer down 16 bytes and\r
// put our return address and frame pointer on the VM stack.\r
// Then set the VM's IP to new EBC code.\r
//\r
- VmPtr->R[0] -= 8;\r
- VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], (UINTN) FramePtr);\r
- VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->R[0];\r
- VmPtr->R[0] -= 8;\r
- VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r
+ VmPtr->Gpr[0] -= 8;\r
+ VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], (UINTN) FramePtr);\r
+ VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->Gpr[0];\r
+ VmPtr->Gpr[0] -= 8;\r
+ VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r
\r
+ CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + IndexOfEbcEntrypoint, sizeof(UINTN));\r
VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;\r
} else {\r
//\r
- // The callee is not a thunk to EBC, call native code.\r
+ // The callee is not a thunk to EBC, call native code,\r
+ // and get return value.\r
//\r
- EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);\r
+ VmPtr->Gpr[7] = EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);\r
\r
//\r
- // Get return value and advance the IP.\r
+ // Advance the IP.\r
//\r
- VmPtr->R[7] = EbcLLGetReturnValue ();\r
VmPtr->Ip += Size;\r
}\r
}\r
\r
\r
/**\r
- Begin executing an EBC image. The address of the entry point is passed\r
- in via a processor register, so we'll need to make a call to get the\r
- value.\r
-\r
- None. Since we're called from a fixed up thunk (which we want to keep\r
- small), our only so-called argument is the EBC entry point passed in\r
- to us in a processor register.\r
+ Begin executing an EBC image.\r
+\r
+ This is a thunk function. Microsoft x64 compiler only provide fast_call\r
+ calling convention, so the first four arguments are passed by rcx, rdx,\r
+ r8, and r9, while other arguments are passed in stack.\r
+\r
+ @param EntryPoint The entrypoint of EBC code.\r
+ @param Arg1 The 1st argument.\r
+ @param Arg2 The 2nd argument.\r
+ @param Arg3 The 3rd argument.\r
+ @param Arg4 The 4th argument.\r
+ @param Arg5 The 5th argument.\r
+ @param Arg6 The 6th argument.\r
+ @param Arg7 The 7th argument.\r
+ @param Arg8 The 8th argument.\r
+ @param Arg9 The 9th argument.\r
+ @param Arg10 The 10th argument.\r
+ @param Arg11 The 11th argument.\r
+ @param Arg12 The 12th argument.\r
+ @param Arg13 The 13th argument.\r
+ @param Arg14 The 14th argument.\r
+ @param Arg15 The 15th argument.\r
+ @param Arg16 The 16th argument.\r
\r
@return The value returned by the EBC application we're going to run.\r
\r
**/\r
-STATIC\r
UINT64\r
+EFIAPI\r
EbcInterpret (\r
- IN OUT UINTN Arg1,\r
- IN OUT UINTN Arg2,\r
- IN OUT UINTN Arg3,\r
- IN OUT UINTN Arg4,\r
- IN OUT UINTN Arg5,\r
- IN OUT UINTN Arg6,\r
- IN OUT UINTN Arg7,\r
- IN OUT UINTN Arg8,\r
- IN OUT UINTN Arg9,\r
- IN OUT UINTN Arg10,\r
- IN OUT UINTN Arg11,\r
- IN OUT UINTN Arg12,\r
- IN OUT UINTN Arg13,\r
- IN OUT UINTN Arg14,\r
- IN OUT UINTN Arg15,\r
- IN OUT UINTN Arg16\r
+ IN UINTN EntryPoint,\r
+ IN UINTN Arg1,\r
+ IN UINTN Arg2,\r
+ IN UINTN Arg3,\r
+ IN UINTN Arg4,\r
+ IN UINTN Arg5,\r
+ IN UINTN Arg6,\r
+ IN UINTN Arg7,\r
+ IN UINTN Arg8,\r
+ IN UINTN Arg9,\r
+ IN UINTN Arg10,\r
+ IN UINTN Arg11,\r
+ IN UINTN Arg12,\r
+ IN UINTN Arg13,\r
+ IN UINTN Arg14,\r
+ IN UINTN Arg15,\r
+ IN UINTN Arg16\r
)\r
{\r
//\r
UINTN StackIndex;\r
\r
//\r
- // Get the EBC entry point from the processor register.\r
+ // Get the EBC entry point\r
//\r
- Addr = EbcLLGetEbcEntryPoint ();\r
+ Addr = EntryPoint;\r
\r
//\r
// Now clear out our context\r
return Status;\r
}\r
VmContext.StackTop = (UINT8*)VmContext.StackPool + (STACK_REMAIN_SIZE);\r
- VmContext.R[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);\r
- VmContext.HighStackBottom = (UINTN)VmContext.R[0];\r
- VmContext.R[0] &= ~(sizeof (UINTN) - 1);\r
- VmContext.R[0] -= sizeof (UINTN);\r
+ VmContext.Gpr[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);\r
+ VmContext.HighStackBottom = (UINTN)VmContext.Gpr[0];\r
+ VmContext.Gpr[0] &= ~((VM_REGISTER)(sizeof (UINTN) - 1));\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
\r
//\r
// Put a magic value in the stack gap, then adjust down again\r
//\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) VM_STACK_KEY_VALUE;\r
- VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.R[0];\r
- VmContext.LowStackTop = (UINTN) VmContext.R[0];\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) VM_STACK_KEY_VALUE;\r
+ VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.Gpr[0];\r
+ VmContext.LowStackTop = (UINTN) VmContext.Gpr[0];\r
\r
//\r
// For IA32, this is where we say our return address is\r
//\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg16;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg15;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg14;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg13;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg12;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg11;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg10;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg9;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg8;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg7;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg6;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg5;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg4;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg3;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg2;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) Arg1;\r
- VmContext.R[0] -= 16;\r
- VmContext.StackRetAddr = (UINT64) VmContext.R[0];\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg16;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg15;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg14;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg13;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg12;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg11;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg10;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg9;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg8;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg7;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg6;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg5;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg4;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg3;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg2;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) Arg1;\r
+ VmContext.Gpr[0] -= 16;\r
+ VmContext.StackRetAddr = (UINT64) VmContext.Gpr[0];\r
\r
//\r
// We need to keep track of where the EBC stack starts. This way, if the EBC\r
//\r
// Begin executing the EBC code\r
//\r
+ EbcDebuggerHookEbcInterpret (&VmContext);\r
EbcExecute (&VmContext);\r
\r
//\r
- // Return the value in R[7] unless there was an error\r
+ // Return the value in Gpr[7] unless there was an error\r
//\r
ReturnEBCStack(StackIndex);\r
- return (UINT64) VmContext.R[7];\r
+ return (UINT64) VmContext.Gpr[7];\r
}\r
\r
\r
/**\r
- Begin executing an EBC image. The address of the entry point is passed\r
- in via a processor register, so we'll need to make a call to get the\r
- value.\r
+ Begin executing an EBC image.\r
\r
- @param ImageHandle image handle for the EBC application we're executing\r
- @param SystemTable standard system table passed into an driver's entry point\r
+ @param EntryPoint The entrypoint of EBC code.\r
+ @param ImageHandle image handle for the EBC application we're executing\r
+ @param SystemTable standard system table passed into an driver's entry\r
+ point\r
\r
@return The value returned by the EBC application we're going to run.\r
\r
**/\r
-STATIC\r
UINT64\r
+EFIAPI\r
ExecuteEbcImageEntryPoint (\r
+ IN UINTN EntryPoint,\r
IN EFI_HANDLE ImageHandle,\r
IN EFI_SYSTEM_TABLE *SystemTable\r
)\r
UINTN StackIndex;\r
\r
//\r
- // Get the EBC entry point from the processor register. Make sure you don't\r
- // call any functions before this or you could mess up the register the\r
- // entry point is passed in.\r
+ // Get the EBC entry point\r
//\r
- Addr = EbcLLGetEbcEntryPoint ();\r
+ Addr = EntryPoint;\r
\r
- //\r
- // Print(L"*** Thunked into EBC entry point - ImageHandle = 0x%X\n", (UINTN)ImageHandle);\r
- // Print(L"EBC entry point is 0x%X\n", (UINT32)(UINTN)Addr);\r
//\r
// Now clear out our context\r
//\r
return Status;\r
}\r
VmContext.StackTop = (UINT8*)VmContext.StackPool + (STACK_REMAIN_SIZE);\r
- VmContext.R[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);\r
- VmContext.HighStackBottom = (UINTN)VmContext.R[0];\r
- VmContext.R[0] -= sizeof (UINTN);\r
+ VmContext.Gpr[0] = (UINT64)(UINTN) ((UINT8*)VmContext.StackPool + STACK_POOL_SIZE);\r
+ VmContext.HighStackBottom = (UINTN)VmContext.Gpr[0];\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
\r
//\r
// Put a magic value in the stack gap, then adjust down again\r
//\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) VM_STACK_KEY_VALUE;\r
- VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.R[0];\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) VM_STACK_KEY_VALUE;\r
+ VmContext.StackMagicPtr = (UINTN *) (UINTN) VmContext.Gpr[0];\r
\r
//\r
// Align the stack on a natural boundary\r
- // VmContext.R[0] &= ~(sizeof(UINTN) - 1);\r
+ // VmContext.Gpr[0] &= ~(sizeof(UINTN) - 1);\r
//\r
- VmContext.LowStackTop = (UINTN) VmContext.R[0];\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) SystemTable;\r
- VmContext.R[0] -= sizeof (UINTN);\r
- *(UINTN *) (UINTN) (VmContext.R[0]) = (UINTN) ImageHandle;\r
+ VmContext.LowStackTop = (UINTN) VmContext.Gpr[0];\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) SystemTable;\r
+ VmContext.Gpr[0] -= sizeof (UINTN);\r
+ *(UINTN *) (UINTN) (VmContext.Gpr[0]) = (UINTN) ImageHandle;\r
\r
- VmContext.R[0] -= 16;\r
- VmContext.StackRetAddr = (UINT64) VmContext.R[0];\r
+ VmContext.Gpr[0] -= 16;\r
+ VmContext.StackRetAddr = (UINT64) VmContext.Gpr[0];\r
//\r
// VM pushes 16-bytes for return address. Simulate that here.\r
//\r
//\r
// Begin executing the EBC code\r
//\r
+ EbcDebuggerHookExecuteEbcImageEntryPoint (&VmContext);\r
EbcExecute (&VmContext);\r
\r
//\r
- // Return the value in R[7] unless there was an error\r
+ // Return the value in Gpr[7] unless there was an error\r
//\r
- return (UINT64) VmContext.R[7];\r
+ ReturnEBCStack(StackIndex);\r
+ return (UINT64) VmContext.Gpr[7];\r
}\r
\r
\r
/**\r
- Create an IA32 thunk for the given EBC entry point.\r
+ Create thunks for an EBC image entry point, or an EBC protocol service.\r
\r
- @param ImageHandle Handle of image for which this thunk is being created\r
- @param EbcEntryPoint Address of the EBC code that the thunk is to call\r
- @param Thunk Returned thunk we create here\r
+ @param ImageHandle Image handle for the EBC image. If not null, then\r
+ we're creating a thunk for an image entry point.\r
+ @param EbcEntryPoint Address of the EBC code that the thunk is to call\r
+ @param Thunk Returned thunk we create here\r
+ @param Flags Flags indicating options for creating the thunk\r
\r
- @return Standard EFI status.\r
+ @retval EFI_SUCCESS The thunk was created successfully.\r
+ @retval EFI_INVALID_PARAMETER The parameter of EbcEntryPoint is not 16-bit\r
+ aligned.\r
+ @retval EFI_OUT_OF_RESOURCES There is not enough memory to created the EBC\r
+ Thunk.\r
+ @retval EFI_BUFFER_TOO_SMALL EBC_THUNK_SIZE is not larger enough.\r
\r
**/\r
EFI_STATUS\r
{\r
UINT8 *Ptr;\r
UINT8 *ThunkBase;\r
- UINT32 I;\r
- UINT32 Addr;\r
- INT32 Size;\r
+ UINT32 Index;\r
INT32 ThunkSize;\r
\r
//\r
return EFI_INVALID_PARAMETER;\r
}\r
\r
- Size = EBC_THUNK_SIZE;\r
- ThunkSize = Size;\r
+ ThunkSize = sizeof(mInstructionBufferTemplate);\r
\r
- Ptr = AllocatePool (Size);\r
+ Ptr = EbcAllocatePoolForThunk (sizeof(mInstructionBufferTemplate));\r
\r
if (Ptr == NULL) {\r
return EFI_OUT_OF_RESOURCES;\r
*Thunk = (VOID *) Ptr;\r
\r
//\r
- // Add a magic code here to help the VM recognize the thunk..\r
- // mov eax, 0xca112ebc => B8 BC 2E 11 CA\r
- //\r
- *Ptr = 0xB8;\r
- Ptr++;\r
- Size--;\r
- Addr = (UINT32) 0xCA112EBC;\r
- for (I = 0; I < sizeof (Addr); I++) {\r
- *Ptr = (UINT8) (UINTN) Addr;\r
- Addr >>= 8;\r
- Ptr++;\r
- Size--;\r
- }\r
-\r
- //\r
- // Add code bytes to load up a processor register with the EBC entry point.\r
- // mov eax, 0xaa55aa55 => B8 55 AA 55 AA\r
- // The first 8 bytes of the thunk entry is the address of the EBC\r
- // entry point.\r
- //\r
- *Ptr = 0xB8;\r
- Ptr++;\r
- Size--;\r
- Addr = (UINT32) EbcEntryPoint;\r
- for (I = 0; I < sizeof (Addr); I++) {\r
- *Ptr = (UINT8) (UINTN) Addr;\r
- Addr >>= 8;\r
- Ptr++;\r
- Size--;\r
- }\r
- //\r
- // Stick in a load of ecx with the address of appropriate VM function.\r
- // mov ecx 12345678h => 0xB9 0x78 0x56 0x34 0x12\r
+ // Copy whole thunk instruction buffer template\r
//\r
- if (Flags & FLAG_THUNK_ENTRY_POINT) {\r
- Addr = (UINT32) (UINTN) ExecuteEbcImageEntryPoint;\r
- } else {\r
- Addr = (UINT32) (UINTN) EbcInterpret;\r
- }\r
+ CopyMem (Ptr, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate));\r
\r
//\r
- // MOV ecx\r
+ // Patch EbcEntryPoint and EbcLLEbcInterpret\r
//\r
- *Ptr = 0xB9;\r
- Ptr++;\r
- Size--;\r
- for (I = 0; I < sizeof (Addr); I++) {\r
- *Ptr = (UINT8) Addr;\r
- Addr >>= 8;\r
- Ptr++;\r
- Size--;\r
+ for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {\r
+ if (*(UINTN *)&Ptr[Index] == EBC_ENTRYPOINT_SIGNATURE) {\r
+ *(UINTN *)&Ptr[Index] = (UINTN)EbcEntryPoint;\r
+ }\r
+ if (*(UINTN *)&Ptr[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {\r
+ if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {\r
+ *(UINTN *)&Ptr[Index] = (UINTN)EbcLLExecuteEbcImageEntryPoint;\r
+ } else {\r
+ *(UINTN *)&Ptr[Index] = (UINTN)EbcLLEbcInterpret;\r
+ }\r
+ }\r
}\r
- //\r
- // Stick in jump opcode bytes for jmp ecx => 0xFF 0xE1\r
- //\r
- *Ptr = 0xFF;\r
- Ptr++;\r
- Size--;\r
- *Ptr = 0xE1;\r
- Size--;\r
\r
- //\r
- // Double check that our defined size is ok (application error)\r
- //\r
- if (Size < 0) {\r
- ASSERT (FALSE);\r
- return EFI_BUFFER_TOO_SMALL;\r
- }\r
//\r
// Add the thunk to the list for this image. Do this last since the add\r
// function flushes the cache for us.\r
projects / mirror_edk2.git / blobdiff