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UefiCpuPkg/CpuExceptionHandler: Revert CpuExceptionHandler binary patching 

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2340

Now that an XCODE5 specific CpuExceptionHandlerLib library is in place,
revert the changes made to the ExceptionHandlerAsm.nasm in commit
2db0ccc2d7 ("UefiCpuPkg: Update CpuExceptionHandlerLib pass XCODE5 tool
chain") so that binary patching of flash code is not performed.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Liming Gao <liming.gao@intel.com>
Acked-by: Bret Barkelew <bret.barkelew@microsoft.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <810f67d8604c054c09d17a22f0bcfaeb41ee8e3b.1588856809.git.thomas.lendacky@amd.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Lendacky, Thomas 2020-05-07 08:06:50 -05:00 committed by mergify[bot]
parent b304d2807b
commit 9378310dd8
1 changed files with 6 additions and 19 deletions
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25
UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.nasm
View File

@ -34,7 +34,7 @@ AsmIdtVectorBegin:
db 0x6a ; push #VectorNum
db ($ - AsmIdtVectorBegin) / ((AsmIdtVectorEnd - AsmIdtVectorBegin) / 32) ; VectorNum
push rax
mov rax, strict qword 0 ; mov rax, ASM_PFX(CommonInterruptEntry)
mov rax, ASM_PFX(CommonInterruptEntry)
jmp rax
%endrep
AsmIdtVectorEnd:
@ -44,8 +44,7 @@ HookAfterStubHeaderBegin:
@VectorNum:
db 0 ; 0 will be fixed
push rax
mov rax, strict qword 0 ; mov rax, HookAfterStubHeaderEnd
JmpAbsoluteAddress:
mov rax, HookAfterStubHeaderEnd
jmp rax
HookAfterStubHeaderEnd:
mov rax, rsp
@ -257,7 +256,8 @@ HasErrorCode:
; and make sure RSP is 16-byte aligned
;
sub rsp, 4 * 8 + 8
call ASM_PFX(CommonExceptionHandler)
mov rax, ASM_PFX(CommonExceptionHandler)
call rax
add rsp, 4 * 8 + 8
cli
@ -365,24 +365,11 @@ DoIret:
; comments here for definition of address map
global ASM_PFX(AsmGetTemplateAddressMap)
ASM_PFX(AsmGetTemplateAddressMap):
lea rax, [AsmIdtVectorBegin]
mov rax, AsmIdtVectorBegin
mov qword [rcx], rax
mov qword [rcx + 0x8], (AsmIdtVectorEnd - AsmIdtVectorBegin) / 32
lea rax, [HookAfterStubHeaderBegin]
mov rax, HookAfterStubHeaderBegin
mov qword [rcx + 0x10], rax
; Fix up CommonInterruptEntry address
lea rax, [ASM_PFX(CommonInterruptEntry)]
lea rcx, [AsmIdtVectorBegin]
%rep 32
mov qword [rcx + (JmpAbsoluteAddress - 8 - HookAfterStubHeaderBegin)], rax
add rcx, (AsmIdtVectorEnd - AsmIdtVectorBegin) / 32
%endrep
; Fix up HookAfterStubHeaderEnd
lea rax, [HookAfterStubHeaderEnd]
lea rcx, [JmpAbsoluteAddress]
mov qword [rcx - 8], rax
ret
;-------------------------------------------------------------------------------------