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CpuExceptionHandlerLib: Refactored out mSwitchCr3Flag.

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This commit is contained in:
Mikhail Krichanov 2025-01-20 16:28:26 +03:00
parent f532beefbd
commit ca7d3c96c0
3 changed files with 6 additions and 13 deletions
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3
UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
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@ -34,7 +34,6 @@ EXCEPTION_ADDRESSES mAddresses;
extern UINTN ExceptionHandlerBase; extern UINTN ExceptionHandlerBase;
extern UINTN ExceptionHandlerEnd; extern UINTN ExceptionHandlerEnd;
extern UINT8 mSwitchCr3Flag;
extern UINTN CorePageTable; extern UINTN CorePageTable;
/** /**
@ -203,8 +202,6 @@ GetExceptionAddresses (
VOID VOID
) )
{ {
mSwitchCr3Flag = 1;
return &mAddresses; return &mAddresses;
} }

8
UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ExceptionHandlerAsm.nasm
View File

@ -38,10 +38,6 @@ global ASM_PFX(UserPageTable)
ASM_PFX(UserPageTable): ASM_PFX(UserPageTable):
resq 1 resq 1
global ASM_PFX(mSwitchCr3Flag)
ASM_PFX(mSwitchCr3Flag):
db 0x0
ALIGN 4096 ALIGN 4096
Padding: Padding:
db 0x0 db 0x0
@ -105,7 +101,9 @@ HookAfterStubHeaderEnd:
global ASM_PFX(CommonInterruptEntry) global ASM_PFX(CommonInterruptEntry)
ASM_PFX(CommonInterruptEntry): ASM_PFX(CommonInterruptEntry):
cli cli
cmp byte [ASM_PFX(mSwitchCr3Flag)], 0 ; Check whether User Space process was interrupted.
mov eax, ds
and eax, 3
jz NoCr3Switch jz NoCr3Switch
mov eax, cr3 mov eax, cr3
mov [ASM_PFX(UserPageTable)], eax mov [ASM_PFX(UserPageTable)], eax

8
UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.nasm
View File

@ -63,10 +63,6 @@ global ASM_PFX(UserPageTable)
ASM_PFX(UserPageTable): ASM_PFX(UserPageTable):
resq 1 resq 1
global ASM_PFX(mSwitchCr3Flag)
ASM_PFX(mSwitchCr3Flag):
db 0x0
ALIGN 4096 ALIGN 4096
Padding: Padding:
db 0x0 db 0x0
@ -140,7 +136,9 @@ HookAfterStubHeaderEnd:
global ASM_PFX(CommonInterruptEntry) global ASM_PFX(CommonInterruptEntry)
ASM_PFX(CommonInterruptEntry): ASM_PFX(CommonInterruptEntry):
cli cli
cmp byte [ASM_PFX(mSwitchCr3Flag)], 0 ; Check whether User Space process was interrupted.
mov rax, ds
and rax, 3
jz NoCr3Switch jz NoCr3Switch
mov rax, cr3 mov rax, cr3
mov [ASM_PFX(UserPageTable)], rax mov [ASM_PFX(UserPageTable)], rax