From a93b0e3f6895a074b99c8817181dfa6dbc7a4807 Mon Sep 17 00:00:00 2001 From: Elvin Li Date: Tue, 29 Oct 2013 06:52:25 +0000 Subject: [PATCH] Use rsp instead of esp to save 64-bit stack pointer. Signed-off-by: Elvin Li Reviewed-by: Liming Gao git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14812 6f19259b-4bc3-4df7-8a09-765794883524 --- MdePkg/Library/BaseLib/X64/Thunk16.S | 6 +++--- MdePkg/Library/BaseLib/X64/Thunk16.asm | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/MdePkg/Library/BaseLib/X64/Thunk16.S b/MdePkg/Library/BaseLib/X64/Thunk16.S index a521aff31b..f592a2868c 100644 --- a/MdePkg/Library/BaseLib/X64/Thunk16.S +++ b/MdePkg/Library/BaseLib/X64/Thunk16.S @@ -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 diff --git a/MdePkg/Library/BaseLib/X64/Thunk16.asm b/MdePkg/Library/BaseLib/X64/Thunk16.asm index 01051341f6..e01de272d2 100644 --- a/MdePkg/Library/BaseLib/X64/Thunk16.asm +++ b/MdePkg/Library/BaseLib/X64/Thunk16.asm @@ -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 -- 2.39.2