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Fix the risk of AP stack conflict.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10714 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
xli24
2010-07-30 01:49:51 +00:00
parent 28d1916584
commit d6d858c4b7
8 changed files with 98 additions and 95 deletions
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36
EdkCompatibilityPkg/Compatibility/MpServicesOnFrameworkMpServicesThunk/X64/MpFuncs.asm
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@@ -112,31 +112,33 @@ LongModeStart::
mov es, ax
mov ss, ax
;
; ProgramStack
;
mov ecx, 1bh ; Read IA32_APIC_BASE MSR
rdmsr
and eax, 0fffff000h
add eax, 20h
mov ebx, dword ptr [eax]
shr ebx, 24
xor rcx, rcx
mov edi, esi
add edi, LockLocation
mov al, NotVacantFlag
TestLock::
xchg byte ptr [edi], al
cmp al, NotVacantFlag
jz TestLock
ProgramStack::
add edi, ProcessorNumberLocation
mov ecx, dword ptr [edi + 4 * ebx] ; RCX = CpuNumber
mov edi, esi
add edi, StackSizeLocation
mov rax, qword ptr [edi]
inc rcx
mul rcx ; RAX = StackSize * (CpuNumber + 1)
mov edi, esi
add edi, StackStartAddressLocation
add rax, qword ptr [edi]
mov rbx, qword ptr [edi]
add rax, rbx ; RAX = StackStart + StackSize * (CpuNumber + 1)
mov rsp, rax
mov qword ptr [edi], rax
Releaselock::
mov al, VacantFlag
mov edi, esi
add edi, LockLocation
xchg byte ptr [edi], al
;
; Call C Function