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Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Thunk16/Ia32/Thunk16.S')
-rw-r--r--EdkCompatibilityPkg/Foundation/Library/Thunk16/Ia32/Thunk16.S366
1 files changed, 183 insertions, 183 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Thunk16/Ia32/Thunk16.S b/EdkCompatibilityPkg/Foundation/Library/Thunk16/Ia32/Thunk16.S
index facbe46c93..0f3abbd789 100644
--- a/EdkCompatibilityPkg/Foundation/Library/Thunk16/Ia32/Thunk16.S
+++ b/EdkCompatibilityPkg/Foundation/Library/Thunk16/Ia32/Thunk16.S
@@ -1,183 +1,183 @@
-#*****************************************************************************
-#*
-#* Copyright (c) 2006 - 2007, Intel Corporation
-#* All rights reserved. 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.asm
-#*
-#* Abstract:
-#*
-#* Real mode thunk
-#*
-#*****************************************************************************
-#include <EfiBind.h>
-
- .686p:
-
-.globl ASM_PFX(mCode16Size)
-
-.data
-mCode16Size: .long _TEXT16SIZE
-
-.data
-
-NullSegSel: .quad 0
-_16BitCsSel:
- .word -1
- .word 0
- .byte 0
- .byte 0x9b
- .byte 0x8f # 16-bit segment
- .byte 0
-_16BitSsSel:
- .word -1
- .word 0
- .byte 0
- .byte 0x93
- .byte 0x8f # 16-bit segment
- .byte 0
-
-_16Gdtr:
- .word _16Gdtr - NullSegSel - 1
- .long NullSegSel
-
-
-.text
-.align 16
-
-
-ASM_PFX(Thunk16):
- push %ebp
- push %ebx
- push %esi
- push %edi
- push %ds
- push %es
- push %fs
- push %gs
- mov 0x24(%esp),%esi
- movzwl 0x32(%esi),%edx
- mov 0xc(%esi),%edi
- add $0xffffffb0,%edi
- push %edi #; save stack offset
- imul $0x10,%edx,%eax #; eax <- edx*16
- add %eax,%edi #; edi <- linear address of 16-bit stack
- push $0xd
- pop %ecx
- rep movsl %ds:(%esi),%es:(%edi) #; copy context to 16-bit stack
- pop %ebx #; ebx <- 16-bit stack offset
- mov $L_Label1,%eax
- stos %eax,%es:(%edi)
- movl %cs,%eax
- stos %ax,%es:(%edi)
- mov 0x28(%esp),%eax
- stos %ax,%es:(%edi)
- mov %esp,%eax
- stos %eax,%es:(%edi)
- movl %ss,%eax
- stos %ax,%es:(%edi)
- sgdtl (%edi)
- sidtl 0x24(%esp)
- mov %cr0,%esi
- mov %esi,0x6(%edi) #; save CR0
- and $0x7ffffffe,%esi #; esi <- CR0 to set
- mov %cr4,%eax
- mov %eax,0xa(%edi) #; save CR4
- and $0xcf,%al #; clear PAE & PSE
- mov %edx,%edi #; edi <- 16-bit stack segment
- mov 0x2c(%esp),%edx
- shl $0x10,%edx
- push %edx
- pop %edx
- mov $(_16BitSsSel - NullSegSel),%dx
- lgdtl _16Gdtr #bugbug mismatch.
- .byte 0xea
- .long L_16Bit #bugbug mismatch.
- .word _16BitCsSel - NullSegSel
-L_16Bit:
- .byte 0x66
- movw %dx,%ss
- mov %esi,%cr0
- mov %eax,%cr4
- .byte 0x67
- .byte 0xff
- .byte 0x6c
- .byte 0x24
- .byte 0xfc
-
-L_Lable1:
- movl %ss,%eax
- shl $0x4,%eax
- add %esp,%eax
- lss 0x3c(%esp),%esp
- lidtl 0x24(%esp)
- pop %gs
- pop %fs
- pop %es
- pop %ds
- pop %edi
- pop %esi
- pop %ebx
- pop %ebp
- ret
-
-.code16
-_Code16Addr:
-ASM_PFX(RealMode):
- movw %di, %ss # set up stack
- movl %ebx, %esp
- lidt %cs:_16Idtr - _Code16Addr #lidt fword ptr cs:[_16Idtr - _Code16Addr]
- .byte 0x66
- popaw
- popw %ds
- popw %es
- popw %fs
- popw %gs
- addw $4, %sp # skip EFlags
- testw $1, 14(%esp) #(_STK16 ptr [esp + 8]).ThunkFlags, 1
- jz 1f
- pushf
-1:
- pushw %cs
-# push @FarCallRet - _Code16Addr
- .byte 0x68 # push /iw
- .word FarCallRet - _Code16Addr
- jz 2f
- ljmp *6(%esp) #bugbug
-2:
- ljmp *4(%esp) #bugbug
-FarCallRet:
- pushfl
- pushw %gs
- pushw %fs
- pushw %es
- pushw %ds
- pushal
- cli
- .byte 0x66 # sizeof (IA32_REGS) = 13 * 4 = 52
- lgdt 66(%esp) #lgdt (_STK16 ptr [esp + sizeof (IA32_REGS)]).SavedGdtr
- mov 76(%esp), %eax
- movl %eax, %cr4
- mov 72(%esp), %eax
- movl %eax, %cr0 # restore CR0
- ljmpl *52(%esp)
-#RealMode ENDP
-
-.text
-_16Idtr:
- .word 0x3ff #_16Idtr FWORD (1 SHL 10) - 1
- .byte 0x00
-
-_TEXT16END:
-
-_TEXT16SIZE = _TEXT16END - _Code16Addr
-
-
+#*****************************************************************************
+#*
+#* Copyright (c) 2006 - 2007, Intel Corporation
+#* All rights reserved. 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.asm
+#*
+#* Abstract:
+#*
+#* Real mode thunk
+#*
+#*****************************************************************************
+#include <EfiBind.h>
+
+ .686p:
+
+.globl ASM_PFX(mCode16Size)
+
+.data
+mCode16Size: .long _TEXT16SIZE
+
+.data
+
+NullSegSel: .quad 0
+_16BitCsSel:
+ .word -1
+ .word 0
+ .byte 0
+ .byte 0x9b
+ .byte 0x8f # 16-bit segment
+ .byte 0
+_16BitSsSel:
+ .word -1
+ .word 0
+ .byte 0
+ .byte 0x93
+ .byte 0x8f # 16-bit segment
+ .byte 0
+
+_16Gdtr:
+ .word _16Gdtr - NullSegSel - 1
+ .long NullSegSel
+
+
+.text
+.align 16
+
+
+ASM_PFX(Thunk16):
+ push %ebp
+ push %ebx
+ push %esi
+ push %edi
+ push %ds
+ push %es
+ push %fs
+ push %gs
+ mov 0x24(%esp),%esi
+ movzwl 0x32(%esi),%edx
+ mov 0xc(%esi),%edi
+ add $0xffffffb0,%edi
+ push %edi #; save stack offset
+ imul $0x10,%edx,%eax #; eax <- edx*16
+ add %eax,%edi #; edi <- linear address of 16-bit stack
+ push $0xd
+ pop %ecx
+ rep movsl %ds:(%esi),%es:(%edi) #; copy context to 16-bit stack
+ pop %ebx #; ebx <- 16-bit stack offset
+ mov $L_Label1,%eax
+ stos %eax,%es:(%edi)
+ movl %cs,%eax
+ stos %ax,%es:(%edi)
+ mov 0x28(%esp),%eax
+ stos %ax,%es:(%edi)
+ mov %esp,%eax
+ stos %eax,%es:(%edi)
+ movl %ss,%eax
+ stos %ax,%es:(%edi)
+ sgdtl (%edi)
+ sidtl 0x24(%esp)
+ mov %cr0,%esi
+ mov %esi,0x6(%edi) #; save CR0
+ and $0x7ffffffe,%esi #; esi <- CR0 to set
+ mov %cr4,%eax
+ mov %eax,0xa(%edi) #; save CR4
+ and $0xcf,%al #; clear PAE & PSE
+ mov %edx,%edi #; edi <- 16-bit stack segment
+ mov 0x2c(%esp),%edx
+ shl $0x10,%edx
+ push %edx
+ pop %edx
+ mov $(_16BitSsSel - NullSegSel),%dx
+ lgdtl _16Gdtr #bugbug mismatch.
+ .byte 0xea
+ .long L_16Bit #bugbug mismatch.
+ .word _16BitCsSel - NullSegSel
+L_16Bit:
+ .byte 0x66
+ movw %dx,%ss
+ mov %esi,%cr0
+ mov %eax,%cr4
+ .byte 0x67
+ .byte 0xff
+ .byte 0x6c
+ .byte 0x24
+ .byte 0xfc
+
+L_Lable1:
+ movl %ss,%eax
+ shl $0x4,%eax
+ add %esp,%eax
+ lss 0x3c(%esp),%esp
+ lidtl 0x24(%esp)
+ pop %gs
+ pop %fs
+ pop %es
+ pop %ds
+ pop %edi
+ pop %esi
+ pop %ebx
+ pop %ebp
+ ret
+
+.code16
+_Code16Addr:
+ASM_PFX(RealMode):
+ movw %di, %ss # set up stack
+ movl %ebx, %esp
+ lidt %cs:_16Idtr - _Code16Addr #lidt fword ptr cs:[_16Idtr - _Code16Addr]
+ .byte 0x66
+ popaw
+ popw %ds
+ popw %es
+ popw %fs
+ popw %gs
+ addw $4, %sp # skip EFlags
+ testw $1, 14(%esp) #(_STK16 ptr [esp + 8]).ThunkFlags, 1
+ jz 1f
+ pushf
+1:
+ pushw %cs
+# push @FarCallRet - _Code16Addr
+ .byte 0x68 # push /iw
+ .word FarCallRet - _Code16Addr
+ jz 2f
+ ljmp *6(%esp) #bugbug
+2:
+ ljmp *4(%esp) #bugbug
+FarCallRet:
+ pushfl
+ pushw %gs
+ pushw %fs
+ pushw %es
+ pushw %ds
+ pushal
+ cli
+ .byte 0x66 # sizeof (IA32_REGS) = 13 * 4 = 52
+ lgdt 66(%esp) #lgdt (_STK16 ptr [esp + sizeof (IA32_REGS)]).SavedGdtr
+ mov 76(%esp), %eax
+ movl %eax, %cr4
+ mov 72(%esp), %eax
+ movl %eax, %cr0 # restore CR0
+ ljmpl *52(%esp)
+#RealMode ENDP
+
+.text
+_16Idtr:
+ .word 0x3ff #_16Idtr FWORD (1 SHL 10) - 1
+ .byte 0x00
+
+_TEXT16END:
+
+_TEXT16SIZE = _TEXT16END - _Code16Addr
+
+
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