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Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.S')
-rw-r--r--EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.S244
1 files changed, 0 insertions, 244 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.S b/EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.S
deleted file mode 100644
index f77388d811..0000000000
--- a/EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.S
+++ /dev/null
@@ -1,244 +0,0 @@
-#*****************************************************************************
-#*
-#* Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR>
-#* This program and the accompanying materials
-#* are licensed and made available under the terms and conditions of the BSD License
-#* which accompanies this distribution. The full text of the license may be found at
-#* http://opensource.org/licenses/bsd-license.php
-#*
-#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-#*
-#* Module Name:
-#*
-#* Thunk.S
-#*
-#* Abstract:
-#*
-#* Real mode thunk
-#*
-#*****************************************************************************
-#include <EfiBind.h>
-
-#ifndef __APPLE__
-
- .data
-
-.globl ASM_PFX(mCode16Size)
-
-.data
-mCode16Size: .long _Code16End - _Code16Addr
-
-
-NullSegSel: .quad 0
-_16CsSegSel:
- .word -1
- .word 0
- .byte 0
- .byte 0x9b
- .byte 0x8f #16-bit segment
- .byte 0
-_16DsSegSel:
- .word -1
- .word 0
- .byte 0
- .byte 0x93
- .byte 0x8f #16-bit segment
- .byte 0
-
-_16Gdtr:
- .word _16Gdtr - NullSegSel - 1
- .long NullSegSel
- .code:
-
-#IA32_REGS STRUC 4t
-#_EDI DD ?
-#_ESI DD ?
-#_EBP DD ?
-#_ESP DD ?
-#_EBX DD ?
-#_EDX DD ?
-#_ECX DD ?
-#_EAX DD ?
-#_DS DW ?
-#_ES DW ?
-#_FS DW ?
-#_GS DW ?
-#_RFLAGS DQ ?
-#_EIP DD ?
-#_CS DW ?
-#_SS DW ?
-#IA32_REGS ENDS
-
-#_STK16 STRUC 1t
-#RetEip DD ?
-#RetCs DW ?
-#ThunkFlags DW ?
-#SavedGdtr FWORD ?
-#Resvd1 DW ?
-#SavedCr0 DD ?
-#SavedCr4 DD ?
-#_STK16 ENDS
-
-ASM_PFX(Thunk16):
- push %rbp
- push %rbx
- push %rsi
- push %rdi
- push %r12
- push %r13
- push %r14
- push %r15
- pushq %fs
- pushq %gs
- movl %ds,%r12d
- movl %es,%r13d
- movl %ss,%r14d
- mov %rsp,%r15
- mov %rcx,%rsi
- movzwq 0x36(%rsi),%r10 #movzx r10, (IA32_REGS ptr [rsi])._SS
- xor %rdi,%rdi
- mov 0xc(%rsi),%edi #mov edi, (IA32_REGS ptr [rsi])._ESP
- add $0xffffffffffffffb0,%rdi #add rdi, - sizeof (IA32_REGS) - sizeof (_STK16)
- push %rdi
- imul $0x10,%r10,%rax
- add %rax,%rdi
- pushq $0xe #push sizeof (IA32_REGS) / 4
- pop %rcx
- rep movsl %ds:(%rsi),%es:(%rdi)
- #; copy eflags to stack frame
- mov -16(%rsi), %rax
- mov %rax, -80(%rsi)
- pop %rbx #rbx <- 16-bit stack offset
- lea Label,%eax #42 <_Thunk16+0x42>
- stos %eax,%es:(%rdi)
- movl %cs,%eax #return segment
- stos %ax,%es:(%rdi)
- mov %edx,%eax #THUNK Flags
- stos %ax,%es:(%rdi)
- sgdt 0x58(%rsp) #save GDTR
- mov 0x58(%rsp),%rax
- stos %rax,%es:(%rdi)
- mov %cr0,%rax #save CR0
- mov %eax,%esi #esi <- CR0 to set
- stos %eax,%es:(%rdi)
- mov %cr4,%rax #save CR4
- stos %eax,%es:(%rdi)
- sidt 0x58(%rsp) #save IDTR
- and $0x7ffffffe,%esi #clear PE & PG bits
- mov %r10,%rdi #rdi <- 16-bit stack segment
- shl $0x10,%r8
- push %r8 #far jmp address
- lea Label_16Bit,%eax
- push %rax
- movw $0x8,0x4(%rsp)
- lgdt _16Gdtr #bugbug: may not match.
- lret
-Label_16Bit:
- .byte 0x66
- movl $0xc0000080,%ecx
- mov %rsi,%cr0 #disable PE & PG
- rdmsr
- and $0xfe,%ah
- wrmsr #clear LME bit
- mov %cr4,%rax
- and $0xcf,%al #clear PAE & PSE
- mov %rax,%cr4
- lret
-
-Label:
- xor %rax,%rax
- movw %ss,%ax
- shl $0x4,%eax
- add %esp,%eax
- mov %r15,%rsp
- lidt 0x58(%rsp)
- movl %r12d,%ds
- movl %r13d,%es
- movl %r14d,%ss
- popq %gs
- popq %fs
- pop %r15
- pop %r14
- pop %r13
- pop %r12
- pop %rdi
- pop %rsi
- pop %rbx
- pop %rbp
- retq
-
-
- .p2align 4
-
-_Code16Addr:
-ASM_PFX(RealMode):
- movl %edi,%ss
- mov %bx,%sp #set up 16-bit stack
- .byte 0x2e
- .byte 0x0f
- .byte 0x01
- .byte 0x1e
- .word _16Idtr - _Code16Addr #lidt _16Idtr
- .byte 0x66
- .byte 0x61 #popad
- .byte 0x1f #pop ds
- .byte 0x07 #pop es
- popq %fs
- popq %gs
- sub 64, %esp
- .byte 0x66, 0x9d #popfd
- add $0x4,%esp #skip high part of RFLAGS
- .byte 0x67 #; test (_STK16 ptr [esp + STACK_PARAM_SIZE + sizeof(IA32_REGS)]).ThunkFlags, 1
- .byte 0xf7
- .byte 0x44
- .byte 0x24
- .byte 0x4e
- .byte 0x01
- .byte 0x00
- jz 1f
- pushfq #pushf, actually, when it's INT#
-1:
- .byte 0x0e #push cs
- .byte 0x68 #push /iw
- .word FarCallRet - _Code16Addr
- jz 2f
- .byte 0x66
- ljmp *70(%esp)
-2:
- .byte 0x66
- ljmp *68(%esp)
-FarCallRet:
- add 64, %esp
- .byte 0x66
- push $0x00 #push a dword of zero
- .byte 0x66
- pushf #pushfd, actually
- pushq %gs
- pushq %fs
- .byte 0x06 #push %es
- .byte 0x1e #push %ds
- .byte 0x66
- .byte 0x60
- cli
- .byte 0x66 #sizeof (IA32_REGS) = 13 * 4 = 52
- lgdt 64(%esp) #lgdt (_STK16 ptr [esp + sizeof (IA32_REGS)]).SavedGdtr
- .byte 0x66
- mov 76(%esp), %eax
- mov %rax, %cr4
- .byte 0x66
- mov $0xc0000080, %ecx
- rdmsr
- orb $1, %ah
- wrmsr
- .byte 0x66
- mov 72(%esp), %eax
- mov %rax, %cr0 #restore CR0
- .byte 0x66
- ljmpl *52(%esp)
-
-_16Idtr:
- .word 0x3ff #FWORD (1 SHL 10) - 1
- .byte 0x00
-
-#endif
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