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UefiCpuPkg/CpuDxe: Fix boot error 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084

When DXE drivers are dispatched above 4GB memory in 64bit
mode, the address setCodeSelectorLongJump in stack will
be override by parameter. Jump to Qword is not supported
by some processors. So use "o64 retf" instead.

Signed-off-by: Guo Dong <guo.dong@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Tested-by: James Bottomley <jejb@linux.ibm.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Guo Dong 2021-01-07 11:10:45 +08:00 committed by mergify[bot]
parent edd74ad3ad
commit ebfe2d3eb5
1 changed files with 3 additions and 5 deletions
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8
UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
View File

@ -20,13 +20,11 @@
;------------------------------------------------------------------------------
global ASM_PFX(SetCodeSelector)
ASM_PFX(SetCodeSelector):
sub rsp, 0x10
push rcx
lea rax, [setCodeSelectorLongJump]
mov [rsp], rax
mov [rsp+4], cx
jmp dword far [rsp]
push rax
o64 retf
setCodeSelectorLongJump:
add rsp, 0x10
ret
;------------------------------------------------------------------------------