diff options
Diffstat (limited to 'UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S')
| -rw-r--r-- | UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S | 310 |
1 files changed, 1 insertions, 309 deletions
diff --git a/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S b/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S index 3b43b6fd8b..e034bc2e2e 100644 --- a/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S +++ b/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------
#*
-#* Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+#* Copyright (c) 2006 - 2013, 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
@@ -19,21 +19,6 @@ #.MMX
#.XMM
-#EXTRN ASM_PFX(mErrorCodeFlag):DWORD # Error code flags for exceptions
-
-
-#
-# point to the external interrupt vector table
-#
-ExternalVectorTablePtr:
- .byte 0, 0, 0, 0
-
-ASM_GLOBAL ASM_PFX(InitializeExternalVectorTablePtr)
-ASM_PFX(InitializeExternalVectorTablePtr):
- movl 4(%esp), %eax
- movl %eax, ExternalVectorTablePtr
- ret
-
#------------------------------------------------------------------------------
# VOID
# SetCodeSelector (
@@ -68,298 +53,5 @@ ASM_PFX(SetDataSelectors): movw %cx, %gs
ret
-#---------------------------------------;
-# CommonInterruptEntry ;
-#---------------------------------------;
-# The follow algorithm is used for the common interrupt routine.
-
-ASM_GLOBAL ASM_PFX(CommonInterruptEntry)
-ASM_PFX(CommonInterruptEntry):
- cli
- #
- # All interrupt handlers are invoked through interrupt gates, so
- # IF flag automatically cleared at the entry point
- #
-
- #
- # Calculate vector number
- #
- # Get the return address of call, actually, it is the
- # address of vector number.
- #
- xchgl (%esp), %ecx
- movw (%ecx), %cx
- andl $0x0FFFF, %ecx
- cmpl $32, %ecx # Intel reserved vector for exceptions?
- jae NoErrorCode
- bt %ecx, ASM_PFX(mErrorCodeFlag)
- jc HasErrorCode
-
-NoErrorCode:
-
- #
- # Stack:
- # +---------------------+
- # + EFlags +
- # +---------------------+
- # + CS +
- # +---------------------+
- # + EIP +
- # +---------------------+
- # + ECX +
- # +---------------------+ <-- ESP
- #
- # Registers:
- # ECX - Vector Number
- #
-
- #
- # Put Vector Number on stack
- #
- pushl %ecx
-
- #
- # Put 0 (dummy) error code on stack, and restore ECX
- #
- xorl %ecx, %ecx # ECX = 0
- xchgl 4(%esp), %ecx
-
- jmp ErrorCodeAndVectorOnStack
-
-HasErrorCode:
-
- #
- # Stack:
- # +---------------------+
- # + EFlags +
- # +---------------------+
- # + CS +
- # +---------------------+
- # + EIP +
- # +---------------------+
- # + Error Code +
- # +---------------------+
- # + ECX +
- # +---------------------+ <-- ESP
- #
- # Registers:
- # ECX - Vector Number
- #
-
- #
- # Put Vector Number on stack and restore ECX
- #
- xchgl (%esp), %ecx
-
-ErrorCodeAndVectorOnStack:
- pushl %ebp
- movl %esp, %ebp
-
- #
- # Stack:
- # +---------------------+
- # + EFlags +
- # +---------------------+
- # + CS +
- # +---------------------+
- # + EIP +
- # +---------------------+
- # + Error Code +
- # +---------------------+
- # + Vector Number +
- # +---------------------+
- # + EBP +
- # +---------------------+ <-- EBP
- #
-
- #
- # Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
- # is 16-byte aligned
- #
- andl $0x0fffffff0, %esp
- subl $12, %esp
-
-#; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
- pushl %eax
- pushl %ecx
- pushl %edx
- pushl %ebx
- leal 24(%ebp), %ecx
- pushl %ecx # ESP
- pushl (%ebp) # EBP
- pushl %esi
- pushl %edi
-
-#; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
- movl %ss, %eax
- pushl %eax
- movzwl 16(%ebp), %eax
- pushl %eax
- movl %ds, %eax
- pushl %eax
- movl %es, %eax
- pushl %eax
- movl %fs, %eax
- pushl %eax
- movl %gs, %eax
- pushl %eax
-
-#; UINT32 Eip;
- movl 12(%ebp), %eax
- pushl %eax
-
-#; UINT32 Gdtr[2], Idtr[2];
- subl $8, %esp
- sidt (%esp)
- movl 2(%esp), %eax
- xchgl (%esp), %eax
- andl $0x0FFFF, %eax
- movl %eax, 4(%esp)
-
- subl $8, %esp
- sgdt (%esp)
- movl 2(%esp), %eax
- xchgl (%esp), %eax
- andl $0x0FFFF, %eax
- movl %eax, 4(%esp)
-
-#; UINT32 Ldtr, Tr;
- xorl %eax, %eax
- str %ax
- pushl %eax
- sldt %ax
- pushl %eax
-
-#; UINT32 EFlags;
- movl 20(%ebp), %eax
- pushl %eax
-
-#; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
- movl %cr4, %eax
- orl $0x208, %eax
- movl %eax, %cr4
- pushl %eax
- movl %cr3, %eax
- pushl %eax
- movl %cr2, %eax
- pushl %eax
- xorl %eax, %eax
- pushl %eax
- movl %cr0, %eax
- pushl %eax
-
-#; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
- movl %dr7, %eax
- pushl %eax
- movl %dr6, %eax
- pushl %eax
- movl %dr3, %eax
- pushl %eax
- movl %dr2, %eax
- pushl %eax
- movl %dr1, %eax
- pushl %eax
- movl %dr0, %eax
- pushl %eax
-
-#; FX_SAVE_STATE_IA32 FxSaveState;
- subl $512, %esp
- movl %esp, %edi
- .byte 0x0f, 0x0ae, 0x07 #fxsave [edi]
-
-#; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
- cld
-
-#; UINT32 ExceptionData;
- pushl 8(%ebp)
-
-#; call into exception handler
- movl ExternalVectorTablePtr, %eax # get the interrupt vectors base
- orl %eax, %eax # NULL?
- jz nullExternalExceptionHandler
-
- mov 4(%ebp), %ecx
- movl (%eax,%ecx,4), %eax
- orl %eax, %eax # NULL?
- jz nullExternalExceptionHandler
-
-#; Prepare parameter and call
- movl %esp, %edx
- pushl %edx
- movl 4(%ebp), %edx
- pushl %edx
-
- #
- # Call External Exception Handler
- #
- call *%eax
- addl $8, %esp
-
-nullExternalExceptionHandler:
-
- cli
-#; UINT32 ExceptionData;
- addl $4, %esp
-
-#; FX_SAVE_STATE_IA32 FxSaveState;
- movl %esp, %esi
- .byte 0x0f, 0x0ae, 0x0e # fxrstor [esi]
- addl $512, %esp
-
-#; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
-#; Skip restoration of DRx registers to support in-circuit emualators
-#; or debuggers set breakpoint in interrupt/exception context
- addl $24, %esp
-
-#; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
- popl %eax
- movl %eax, %cr0
- addl $4, %esp # not for Cr1
- popl %eax
- movl %eax, %cr2
- popl %eax
- movl %eax, %cr3
- popl %eax
- movl %eax, %cr4
-
-#; UINT32 EFlags;
- popl 20(%ebp)
-
-#; UINT32 Ldtr, Tr;
-#; UINT32 Gdtr[2], Idtr[2];
-#; Best not let anyone mess with these particular registers...
- addl $24, %esp
-
-#; UINT32 Eip;
- popl 12(%ebp)
-
-#; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
-#; NOTE - modified segment registers could hang the debugger... We
-#; could attempt to insulate ourselves against this possibility,
-#; but that poses risks as well.
-#;
- popl %gs
- popl %fs
- popl %es
- popl %ds
- popl 16(%ebp)
- popl %ss
-
-#; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
- popl %edi
- popl %esi
- addl $4, %esp # not for ebp
- addl $4, %esp # not for esp
- popl %ebx
- popl %edx
- popl %ecx
- popl %eax
-
- movl %ebp, %esp
- popl %ebp
- addl $8, %esp
- iretl
-
-
#END
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