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audk
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Gcc cleanup 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5589 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
eric_tian 2008-07-31 06:56:12 +00:00
parent 12b2b6c416
commit 6a28ac4441
1 changed files with 46 additions and 46 deletions
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42
MdePkg/Library/BaseLib/X64/Thunk16.S
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@ -79,8 +79,8 @@ ASM_PFX(BackFromUserCode):
.byte 0x16 # push ss
.byte 0xe # push cs
.byte 0x66
call @Base # push eip
@Base:
call L_Base # push eip
L_Base:
.byte 0x66
pushq $0 # reserved high order 32 bits of EFlags
.byte 0x66, 0x9c # pushfd actually
@ -93,17 +93,17 @@ ASM_PFX(BackFromUserCode):
.byte 0x66,0xba # mov edx, imm32
_ThunkAttr: .space 4
testb $THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15, %dl
jz @1
jz L_1
movl $0x15cd2401,%eax # mov ax, 2401h & int 15h
cli # disable interrupts
jnc @2
@1:
jnc L_2
L_1:
testb $THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL, %dl
jz @2
jz L_2
inb $0x92,%al
orb $2,%al
outb %al, $0x92 # deactivate A20M#
@2:
L_2:
movl %ss,%eax
lea IA32_REGS_SIZE(%esp), %bp
#
@ -116,9 +116,9 @@ _ThunkAttr: .space 4
addw %ax,%bp # add ebp, eax
movw %cs,%ax
shlw $4,%ax
lea (@64BitCode - @Base)(%ebx, %eax), %ax
.byte 0x66,0x2e,0x89,0x87 # mov cs:[bx + (@64Eip - @Base)], eax
.word @64Eip - @Base
lea (L_64BitCode - L_Base)(%ebx, %eax), %ax
.byte 0x66,0x2e,0x89,0x87 # mov cs:[bx + (L_64Eip - L_Base)], eax
.word L_64Eip - L_Base
.byte 0x66,0xb8 # mov eax, imm32
SavedCr4: .space 4
movq %rax, %cr4
@ -126,7 +126,7 @@ SavedCr4: .space 4
# rdi in the instruction below is indeed bx in 16-bit code
#
.byte 0x66,0x2e # 2eh is "cs:" segment override
lgdt (SavedGdt - @Base)(%rdi)
lgdt (SavedGdt - L_Base)(%rdi)
.byte 0x66
movl $0xc0000080,%ecx
rdmsr
@ -135,10 +135,10 @@ SavedCr4: .space 4
.byte 0x66,0xb8 # mov eax, imm32
SavedCr0: .space 4
movq %rax, %cr0
.byte 0x66,0xea # jmp far cs:@64Bit
@64Eip: .space 4
.byte 0x66,0xea # jmp far cs:L_64Bit
L_64Eip: .space 4
SavedCs: .space 2
@64BitCode:
L_64BitCode:
movq %r8, %rsp
ret
@ -170,16 +170,16 @@ ASM_PFX(ToUserCode):
movl %esi,%ss # set up 16-bit stack segment
movw %bx,%sp # set up 16-bit stack pointer
.byte 0x66 # make the following call 32-bit
call @Base1 # push eip
@Base1:
popw %bp # ebp <- address of @Base1
call L_Base1 # push eip
L_Base1:
popw %bp # ebp <- address of L_Base1
pushq (IA32_REGS_SIZE + 2)(%esp)
lea 0x0c(%rsi), %eax
pushq %rax
lret # execution begins at next instruction
@RealMode:
L_RealMode:
.byte 0x66,0x2e # CS and operand size override
lidt (_16Idtr - @Base1)(%rsi)
lidt (_16Idtr - L_Base1)(%rsi)
.byte 0x66,0x61 # popad
.byte 0x1f # pop ds
.byte 0x7 # pop es
@ -273,14 +273,14 @@ ASM_PFX(InternalAsmThunk16):
movl %edx,%ss
pushfq
lea -8(%rdx), %edx
lea @RetFromRealMode, %r8
lea L_RetFromRealMode, %r8
pushq %r8
movl %cs, %r8d
movw %r8w, (SavedCs - SavedCr4)(%rcx)
movq %rsp, %r8
.byte 0xff, 0x69 # jmp (_EntryPoint - SavedCr4)(%rcx)
.byte _EntryPoint - SavedCr4
@RetFromRealMode:
L_RetFromRealMode:
popfq
lidt 0x38(%rsp)
lea -IA32_REGS_SIZE(%rbp), %eax