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Diffstat (limited to 'EdkModulePkg/Universal/Ebc/Dxe/x64/EbcLowLevel.asm')
| -rw-r--r-- | EdkModulePkg/Universal/Ebc/Dxe/x64/EbcLowLevel.asm | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/EdkModulePkg/Universal/Ebc/Dxe/x64/EbcLowLevel.asm b/EdkModulePkg/Universal/Ebc/Dxe/x64/EbcLowLevel.asm deleted file mode 100644 index 7b59e93aa1..0000000000 --- a/EdkModulePkg/Universal/Ebc/Dxe/x64/EbcLowLevel.asm +++ /dev/null @@ -1,154 +0,0 @@ - page ,132
- title VM ASSEMBLY LANGUAGE ROUTINES
-;****************************************************************************
-;*
-;* Copyright (c) 2006, Intel Corporation
-;* All rights reserved. This program and the accompanying materials
-;* are licensed and made available under the terms and conditions of the BSD License
-;* which accompanies this distribution. The full text of the license may be found at
-;* http://opensource.org/licenses/bsd-license.php
-;*
-;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-;*
-;****************************************************************************
-;****************************************************************************
-; REV 1.0
-;****************************************************************************
-;
-; Rev Date Description
-; --- -------- ------------------------------------------------------------
-; 1.0 05/09/12 Initial creation of file.
-;
-;****************************************************************************
-
-;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
-; This code provides low level routines that support the Virtual Machine
-; for option ROMs.
-;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
-
-;---------------------------------------------------------------------------
-; Equate files needed.
-;---------------------------------------------------------------------------
-
-text SEGMENT
-
-;---------------------------------------------------------------------------
-;;GenericPostSegment SEGMENT USE16
-;---------------------------------------------------------------------------
-
-;****************************************************************************
-; EbcLLCALLEX
-;
-; This function is called to execute an EBC CALLEX instruction.
-; This instruction requires that we thunk out to external native
-; code. For x64, we switch stacks, copy the arguments to the stack
-; and jump to the specified function.
-; On return, we restore the stack pointer to its original location.
-;
-; Destroys no working registers.
-;****************************************************************************
-; VOID EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
-
-CopyMem PROTO Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
-
-
-EbcLLCALLEXNative PROC NEAR PUBLIC
- push rbp
- push rbx
- mov rbp, rsp
- ; Function prolog
-
- ; Copy FuncAddr to a preserved register.
- mov rbx, rcx
-
- ; Set stack pointer to new value
- sub r8, rdx
- sub rsp, r8
- mov rcx, rsp
- sub rsp, 20h
- call CopyMem
- add rsp, 20h
-
- ; Considering the worst case, load 4 potiential arguments
- ; into registers.
- mov rcx, qword ptr [rsp]
- mov rdx, qword ptr [rsp+8h]
- mov r8, qword ptr [rsp+10h]
- mov r9, qword ptr [rsp+18h]
-
- ; Now call the external routine
- call rbx
-
- ; Function epilog
- mov rsp, rbp
- pop rbx
- pop rbp
- ret
-EbcLLCALLEXNative ENDP
-
-
-; UINTN EbcLLGetEbcEntryPoint(VOID);
-; Routine Description:
-; The VM thunk code stuffs an EBC entry point into a processor
-; register. Since we can't use inline assembly to get it from
-; the interpreter C code, stuff it into the return value
-; register and return.
-;
-; Arguments:
-; None.
-;
-; Returns:
-; The contents of the register in which the entry point is passed.
-;
-EbcLLGetEbcEntryPoint PROC NEAR PUBLIC
- ret
-EbcLLGetEbcEntryPoint ENDP
-
-;/*++
-;
-;Routine Description:
-;
-; Return the caller's value of the stack pointer.
-;
-;Arguments:
-;
-; None.
-;
-;Returns:
-;
-; The current value of the stack pointer for the caller. We
-; adjust it by 4 here because when they called us, the return address
-; is put on the stack, thereby lowering it by 4 bytes.
-;
-;--*/
-
-; UINTN EbcLLGetStackPointer()
-EbcLLGetStackPointer PROC NEAR PUBLIC
- mov rax, rsp ; get current stack pointer
- ; Stack adjusted by this much when we were called,
- ; For this function, it's 4.
- add rax, 4
- ret
-EbcLLGetStackPointer ENDP
-
-; UINT64 EbcLLGetReturnValue(VOID);
-; Routine Description:
-; When EBC calls native, on return the VM has to stuff the return
-; value into a VM register. It's assumed here that the value is still
-; in the register, so simply return and the caller should get the
-; return result properly.
-;
-; Arguments:
-; None.
-;
-; Returns:
-; The unmodified value returned by the native code.
-;
-EbcLLGetReturnValue PROC NEAR PUBLIC
- ret
-EbcLLGetReturnValue ENDP
-
-text ENDS
-END
-
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