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2nd wave of r11105 checkin.2nd wave of r11105 checkin.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11106 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
2010-12-01 00:41:31 +00:00
parent 2ff79f2eda
commit d0c3acd4c4
6 changed files with 190 additions and 179 deletions
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60
UnixPkg/Library/UnixBaseLib/X64/Thunk16.S
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@@ -30,31 +30,37 @@ ASM_GLOBAL ASM_PFX(mTransition)
ASM_GLOBAL ASM_PFX(InternalAsmThunk16)
# define the structure of IA32_REGS
.set _EDI, 0 #size 4
.set _ESI, 4 #size 4
.set _EBP, 8 #size 4
.set _ESP, 12 #size 4
.set _EBX, 16 #size 4
.set _EDX, 20 #size 4
.set _ECX, 24 #size 4
.set _EAX, 28 #size 4
.set _DS, 32 #size 2
.set _ES, 34 #size 2
.set _FS, 36 #size 2
.set _GS, 38 #size 2
.set _EFLAGS, 40 #size 8
.set _EIP, 48 #size 4
.set _CS, 52 #size 2
.set _SS, 54 #size 2
.set IA32_REGS_SIZE, 56
#define _EDI 0 // size 4
#define _ESI 4 // size 4
#define _EBP 8 // size 4
#define _ESP 12 // size 4
#define _EBX 16 // size 4
#define _EDX 20 // size 4
#define _ECX 24 // size 4
#define _EAX 28 // size 4
#define _DS 32 // size 2
#define _ES 34 // size 2
#define _FS 36 // size 2
#define _GS 38 // size 2
#define _EFLAGS 40 // size 8
#define _EIP 48 // size 4
#define _CS 52 // size 2
#define _SS 54 // size 2
#define IA32_REGS_SIZE 56
.data
ASM_PFX(m16Size): .word ASM_PFX(InternalAsmThunk16) - ASM_PFX(m16Start)
ASM_PFX(mThunk16Attr): .word _ThunkAttr - ASM_PFX(m16Start)
ASM_PFX(m16Gdt): .word ASM_PFX(NullSeg) - ASM_PFX(m16Start)
ASM_PFX(m16GdtrBase): .word _16GdtrBase - ASM_PFX(m16Start)
ASM_PFX(mTransition): .word _EntryPoint - ASM_PFX(m16Start)
.set L_m16SizeSym, ASM_PFX(InternalAsmThunk16) - ASM_PFX(m16Start)
.set L_mThunk16AttrSym, _ThunkAttr - ASM_PFX(m16Start)
.set L_m16GdtSym, ASM_PFX(NullSeg) - ASM_PFX(m16Start)
.set L_m16GdtrBaseSym, _16GdtrBase - ASM_PFX(m16Start)
.set L_mTransitionSym, _EntryPoint - ASM_PFX(m16Start)
ASM_PFX(m16Size): .word L_m16SizeSym
ASM_PFX(mThunk16Attr): .word L_mThunk16AttrSym
ASM_PFX(m16Gdt): .word L_m16GdtSym
ASM_PFX(m16GdtrBase): .word L_m16GdtrBaseSym
ASM_PFX(mTransition): .word L_mTransitionSym
.text
@@ -118,7 +124,8 @@ L_2:
shlw $4,%ax
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
.set EipOffset, L_64Eip - L_Base
.word EipOffset
.byte 0x66,0xb8 # mov eax, imm32
SavedCr4: .space 4
movq %rax, %cr4
@@ -147,7 +154,7 @@ SavedSp: .space 4 # restore stack
_EntryPoint: .long ASM_PFX(ToUserCode) - ASM_PFX(m16Start)
.word CODE16
_16Gdtr: .word GDT_SIZE - 1
_16Gdtr: .word L_GDT_SIZE - 1
_16GdtrBase: .quad ASM_PFX(NullSeg)
_16Idtr: .word 0x3ff
.long 0
@@ -220,7 +227,7 @@ ASM_PFX(_32Data):
.byte 0xcf # 16-bit segment, 4GB limit
.byte 0
.set GDT_SIZE, . - ASM_PFX(NullSeg)
.set L_GDT_SIZE, . - ASM_PFX(NullSeg)
#------------------------------------------------------------------------------
# IA32_REGISTER_SET *
@@ -301,7 +308,8 @@ ASM_PFX(InternalAsmThunk16):
movw %r8w, (SavedCs - SavedCr4)(%rcx)
movl %esp, (SavedSp - SavedCr4)(%rcx)
.byte 0xff, 0x69 # jmp (_EntryPoint - SavedCr4)(%rcx)
.byte _EntryPoint - SavedCr4
.set EntryPointSavedCr4Offset, _EntryPoint - SavedCr4
.byte EntryPointSavedCr4Offset
L_RetFromRealMode:
popfq
lgdt 0x60(%rsp) # restore protected mode GDTR