mirror of https://github.com/acidanthera/audk.git
MdeModulePkg EbcDxe: Convert Ia32/EbcLowLevel.asm to NASM
The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert Ia32/EbcLowLevel.asm to Ia32/EbcLowLevel.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Jordan Justen
Liming Gao
parent
63b865c63c
commit
99d01823a8
|
|
@ -39,6 +39,7 @@
|
|||
|
||||
[Sources.Ia32]
|
||||
Ia32/EbcSupport.c
|
||||
Ia32/EbcLowLevel.nasm
|
||||
Ia32/EbcLowLevel.S
|
||||
Ia32/EbcLowLevel.asm
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,197 @@
|
|||
;/** @file
|
||||
;
|
||||
; This code provides low level routines that support the Virtual Machine
|
||||
; for option ROMs.
|
||||
;
|
||||
; Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
|
||||
; 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.
|
||||
;
|
||||
;**/
|
||||
|
||||
;---------------------------------------------------------------------------
|
||||
; Equate files needed.
|
||||
;---------------------------------------------------------------------------
|
||||
|
||||
;---------------------------------------------------------------------------
|
||||
; Assembler options
|
||||
;---------------------------------------------------------------------------
|
||||
|
||||
SECTION .text
|
||||
extern ASM_PFX(CopyMem)
|
||||
extern ASM_PFX(EbcInterpret)
|
||||
extern ASM_PFX(ExecuteEbcImageEntryPoint)
|
||||
|
||||
;****************************************************************************
|
||||
; EbcLLCALLEXNative
|
||||
;
|
||||
; This function is called to execute an EBC CALLEX instruction
|
||||
; to native code.
|
||||
; This instruction requires that we thunk out to external native
|
||||
; code. For IA32, we simply switch stacks and jump to the
|
||||
; specified function. On return, we restore the stack pointer
|
||||
; to its original location.
|
||||
;
|
||||
; Destroys no working registers.
|
||||
;****************************************************************************
|
||||
; INT64 EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
|
||||
global ASM_PFX(EbcLLCALLEXNative)
|
||||
ASM_PFX(EbcLLCALLEXNative):
|
||||
push ebp
|
||||
push ebx
|
||||
mov ebp, esp ; standard function prolog
|
||||
|
||||
; Get function address in a register
|
||||
; mov ecx, FuncAddr => mov ecx, dword ptr [FuncAddr]
|
||||
mov ecx, dword [esp + 0xC]
|
||||
|
||||
; Set stack pointer to new value
|
||||
; mov eax, NewStackPointer => mov eax, dword ptr [NewSp]
|
||||
mov eax, dword [esp + 0x14]
|
||||
mov edx, dword [esp + 0x10]
|
||||
sub eax, edx
|
||||
sub esp, eax
|
||||
mov ebx, esp
|
||||
push ecx
|
||||
push eax
|
||||
push edx
|
||||
push ebx
|
||||
call ASM_PFX(CopyMem)
|
||||
pop eax
|
||||
pop eax
|
||||
pop eax
|
||||
pop ecx
|
||||
|
||||
; Now call the external routine
|
||||
call ecx
|
||||
|
||||
; ebp is preserved by the callee. In this function it
|
||||
; equals the original esp, so set them equal
|
||||
mov esp, ebp
|
||||
|
||||
; Standard function epilog
|
||||
mov esp, ebp
|
||||
pop ebx
|
||||
pop ebp
|
||||
ret
|
||||
|
||||
;****************************************************************************
|
||||
; EbcLLEbcInterpret
|
||||
;
|
||||
; Begin executing an EBC image.
|
||||
;****************************************************************************
|
||||
; UINT64 EbcLLEbcInterpret(VOID)
|
||||
global ASM_PFX(EbcLLEbcInterpret)
|
||||
ASM_PFX(EbcLLEbcInterpret):
|
||||
;
|
||||
;; mov eax, 0xca112ebc
|
||||
;; mov eax, EbcEntryPoint
|
||||
;; mov ecx, EbcLLEbcInterpret
|
||||
;; jmp ecx
|
||||
;
|
||||
; Caller uses above instruction to jump here
|
||||
; The stack is below:
|
||||
; +-----------+
|
||||
; | RetAddr |
|
||||
; +-----------+
|
||||
; |EntryPoint | (EAX)
|
||||
; +-----------+
|
||||
; | Arg1 | <- EDI
|
||||
; +-----------+
|
||||
; | Arg2 |
|
||||
; +-----------+
|
||||
; | ... |
|
||||
; +-----------+
|
||||
; | Arg16 |
|
||||
; +-----------+
|
||||
; | EDI |
|
||||
; +-----------+
|
||||
; | ESI |
|
||||
; +-----------+
|
||||
; | EBP | <- EBP
|
||||
; +-----------+
|
||||
; | RetAddr | <- ESP is here
|
||||
; +-----------+
|
||||
; | Arg1 | <- ESI
|
||||
; +-----------+
|
||||
; | Arg2 |
|
||||
; +-----------+
|
||||
; | ... |
|
||||
; +-----------+
|
||||
; | Arg16 |
|
||||
; +-----------+
|
||||
;
|
||||
|
||||
; Construct new stack
|
||||
push ebp
|
||||
mov ebp, esp
|
||||
push esi
|
||||
push edi
|
||||
sub esp, 0x40
|
||||
push eax
|
||||
mov esi, ebp
|
||||
add esi, 8
|
||||
mov edi, esp
|
||||
add edi, 4
|
||||
mov ecx, 16
|
||||
rep movsd
|
||||
|
||||
; call C-code
|
||||
call ASM_PFX(EbcInterpret)
|
||||
add esp, 0x44
|
||||
pop edi
|
||||
pop esi
|
||||
pop ebp
|
||||
ret
|
||||
|
||||
;****************************************************************************
|
||||
; EbcLLExecuteEbcImageEntryPoint
|
||||
;
|
||||
; Begin executing an EBC image.
|
||||
;****************************************************************************
|
||||
; UINT64 EbcLLExecuteEbcImageEntryPoint(VOID)
|
||||
global ASM_PFX(EbcLLExecuteEbcImageEntryPoint)
|
||||
ASM_PFX(EbcLLExecuteEbcImageEntryPoint):
|
||||
;
|
||||
;; mov eax, 0xca112ebc
|
||||
;; mov eax, EbcEntryPoint
|
||||
;; mov ecx, EbcLLExecuteEbcImageEntryPoint
|
||||
;; jmp ecx
|
||||
;
|
||||
; Caller uses above instruction to jump here
|
||||
; The stack is below:
|
||||
; +-----------+
|
||||
; | RetAddr |
|
||||
; +-----------+
|
||||
; |EntryPoint | (EAX)
|
||||
; +-----------+
|
||||
; |ImageHandle|
|
||||
; +-----------+
|
||||
; |SystemTable|
|
||||
; +-----------+
|
||||
; | RetAddr | <- ESP is here
|
||||
; +-----------+
|
||||
; |ImageHandle|
|
||||
; +-----------+
|
||||
; |SystemTable|
|
||||
; +-----------+
|
||||
;
|
||||
|
||||
; Construct new stack
|
||||
mov [esp - 0xC], eax
|
||||
mov eax, [esp + 0x4]
|
||||
mov [esp - 0x8], eax
|
||||
mov eax, [esp + 0x8]
|
||||
mov [esp - 0x4], eax
|
||||
|
||||
; call C-code
|
||||
sub esp, 0xC
|
||||
call ASM_PFX(ExecuteEbcImageEntryPoint)
|
||||
add esp, 0xC
|
||||
ret
|
||||
|
||||
Loading…
Reference in New Issue