fa97cbf4ef
Add missing EFIPAI for EbcInterpret and ExecuteEbcImageEntryPoint(). Get return value in EbcLLCALLEXNative(), remove EbcLLGetReturnValue(). 2) Fix IA32 EBC interpreter bug on MOVsnw and MOVsnd. 3) Some cleanup Add missing ReturnEBCStack() for IA32 build. Remove unnecessary EbcLLGetStackPointer() for X64 and IPF build. Remove deadcode EbcLLGetStackPointer() and EbcLLGetReturnValue() in IA32/X64/IPF ASM code. Dump more info in CommonEbcExceptionHandler(). Signed-off-by: jyao1 Reviewed-by: Elvinli git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12745 6f19259b-4bc3-4df7-8a09-765794883524
87 lines
2.7 KiB
ArmAsm
87 lines
2.7 KiB
ArmAsm
#/** @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) 2007 - 2011, 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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#****************************************************************************
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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 x64, we switch stacks, copy the arguments to the stack
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# and jump to the specified function.
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# On return, we restore the stack pointer to its original location.
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#
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# Destroys no working registers.
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#****************************************************************************
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# VOID 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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push %rbp
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push %rbx
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mov %rsp, %rbp
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# Function prolog
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# Copy FuncAddr to a preserved register.
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mov %rcx, %rbx
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# Set stack pointer to new value
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sub %rdx, %r8
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sub %r8, %rsp
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mov %rsp, %rcx
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sub $0x20, %rsp
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call ASM_PFX(CopyMem)
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add $0x20, %rsp
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# Considering the worst case, load 4 potiential arguments
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# into registers.
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mov (%rsp), %rcx
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mov 0x8(%rsp), %rdx
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mov 0x10(%rsp), %r8
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mov 0x18(%rsp), %r9
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# Now call the external routine
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call *%rbx
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# Function epilog
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mov %rbp, %rsp
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pop %rbx
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pop %rbp
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ret
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# UINTN EbcLLGetEbcEntryPoint(VOID);
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# Routine Description:
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# The VM thunk code stuffs an EBC entry point into a processor
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# register. Since we can't use inline assembly to get it from
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# the interpreter C code, stuff it into the return value
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# register and return.
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#
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# Arguments:
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# None.
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#
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# Returns:
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# The contents of the register in which the entry point is passed.
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#
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ASM_GLOBAL ASM_PFX(EbcLLGetEbcEntryPoint);
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ASM_PFX(EbcLLGetEbcEntryPoint):
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mov %r10, %rax
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ret
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