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audk
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Use rsp instead of esp to save 64-bit stack pointer. 

Signed-off-by: Elvin Li <elvin.li@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14812 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Elvin Li 2013-10-29 06:52:25 +00:00 committed by li-elvin
parent d1edec0a33
commit a93b0e3f68
2 changed files with 6 additions and 6 deletions
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6
MdePkg/Library/BaseLib/X64/Thunk16.S
View File

@ -146,8 +146,8 @@ L_64Eip: .space 4
L_SavedCs: .space 2
L_64BitCode:
.byte 0x90
.byte 0x67,0xbc # mov esp, imm32
L_SavedSp: .space 4 # restore stack
.byte 0x48,0xbc # mov rsp, imm64
L_SavedSp: .space 8 # restore stack
nop
ret
@ -307,7 +307,7 @@ ASM_PFX(InternalAsmThunk16):
pushq %r8
movl %cs, %r8d
movw %r8w, (L_SavedCs - L_SavedCr4)(%rcx)
movl %esp, (L_SavedSp - L_SavedCr4)(%rcx)
movq %rsp, (L_SavedSp - L_SavedCr4)(%rcx)
.byte 0xff, 0x69 # jmp (_EntryPoint - L_SavedCr4)(%rcx)
.set Ltemp1, _EntryPoint - L_SavedCr4
.byte Ltemp1

6
MdePkg/Library/BaseLib/X64/Thunk16.asm
View File

@ -142,8 +142,8 @@ SavedCr0 DD ?
SavedCs DW ?
@64BitCode:
db 090h
db 067h, 0bch ; mov esp, imm32
SavedSp DD ? ; restore stack
db 048h, 0bch ; mov rsp, imm64
SavedSp DQ ? ; restore stack
nop
ret
_BackFromUserCode ENDP
@ -294,7 +294,7 @@ InternalAsmThunk16 PROC USES rbp rbx rsi rdi
push r8
mov r8d, cs
mov [rcx + (SavedCs - SavedCr4)], r8w
mov [rcx + (SavedSp - SavedCr4)], esp
mov [rcx + (SavedSp - SavedCr4)], rsp
jmp fword ptr [rcx + (_EntryPoint - SavedCr4)]
@RetFromRealMode:
popfq