643 lines
16 KiB
ArmAsm
643 lines
16 KiB
ArmAsm
#------------------------------------------------------------------------------
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#*
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#* Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
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#* This program and the accompanying materials
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#* are licensed and made available under the terms and conditions of the BSD License
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#* which accompanies this distribution. The full text of the license may be found at
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#* http://opensource.org/licenses/bsd-license.php
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#*
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#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#*
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#* ExceptionHandlerAsm.S
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#*
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#* Abstract:
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#*
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#* IA32 CPU Exception Handler
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#
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#------------------------------------------------------------------------------
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#.MMX
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#.XMM
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ASM_GLOBAL ASM_PFX(CommonExceptionHandler)
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ASM_GLOBAL ASM_PFX(CommonInterruptEntry)
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ASM_GLOBAL ASM_PFX(HookAfterStubHeaderEnd)
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#EXTRN ASM_PFX(mErrorCodeFlag):DWORD # Error code flags for exceptions
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#EXTRN ASM_PFX(mDoFarReturnFlag):DWORD # Do far return flag
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.text
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#
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# exception handler stub table
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#
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Exception0Handle:
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.byte 0x6a # push #VectorNum
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.byte 0
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception1Handle:
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.byte 0x6a # push #VectorNum
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.byte 1
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception2Handle:
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.byte 0x6a # push #VectorNum
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.byte 2
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception3Handle:
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.byte 0x6a # push #VectorNum
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.byte 3
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception4Handle:
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.byte 0x6a # push #VectorNum
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.byte 4
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception5Handle:
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.byte 0x6a # push #VectorNum
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.byte 5
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception6Handle:
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.byte 0x6a # push #VectorNum
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.byte 6
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception7Handle:
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.byte 0x6a # push #VectorNum
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.byte 7
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception8Handle:
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.byte 0x6a # push #VectorNum
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.byte 8
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception9Handle:
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.byte 0x6a # push #VectorNum
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.byte 9
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception10Handle:
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.byte 0x6a # push #VectorNum
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.byte 10
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception11Handle:
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.byte 0x6a # push #VectorNum
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.byte 11
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception12Handle:
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.byte 0x6a # push #VectorNum
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.byte 12
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception13Handle:
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.byte 0x6a # push #VectorNum
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.byte 13
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception14Handle:
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.byte 0x6a # push #VectorNum
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.byte 14
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception15Handle:
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.byte 0x6a # push #VectorNum
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.byte 15
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception16Handle:
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.byte 0x6a # push #VectorNum
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.byte 16
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception17Handle:
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.byte 0x6a # push #VectorNum
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.byte 17
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception18Handle:
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.byte 0x6a # push #VectorNum
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.byte 18
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception19Handle:
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.byte 0x6a # push #VectorNum
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.byte 19
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception20Handle:
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.byte 0x6a # push #VectorNum
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.byte 20
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception21Handle:
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.byte 0x6a # push #VectorNum
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.byte 21
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception22Handle:
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.byte 0x6a # push #VectorNum
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.byte 22
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception23Handle:
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.byte 0x6a # push #VectorNum
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.byte 23
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception24Handle:
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.byte 0x6a # push #VectorNum
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.byte 24
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception25Handle:
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.byte 0x6a # push #VectorNum
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.byte 25
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception26Handle:
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.byte 0x6a # push #VectorNum
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.byte 26
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception27Handle:
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.byte 0x6a # push #VectorNum
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.byte 27
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception28Handle:
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.byte 0x6a # push #VectorNum
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.byte 28
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception29Handle:
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.byte 0x6a # push #VectorNum
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.byte 29
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception30Handle:
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.byte 0x6a # push #VectorNum
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.byte 30
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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Exception31Handle:
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.byte 0x6a # push #VectorNum
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.byte 31
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pushl %eax
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.byte 0xB8
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.long ASM_PFX(CommonInterruptEntry)
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jmp *%eax
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HookAfterStubBegin:
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.byte 0x6a # push
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VectorNum:
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.byte 0 # 0 will be fixed
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pushl %eax
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.byte 0xB8 # movl ASM_PFX(HookAfterStubHeaderEnd), %eax
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.long ASM_PFX(HookAfterStubHeaderEnd)
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jmp *%eax
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ASM_GLOBAL ASM_PFX(HookAfterStubHeaderEnd)
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ASM_PFX(HookAfterStubHeaderEnd):
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popl %eax
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subl $8, %esp # reserve room for filling exception data later
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pushl 8(%esp)
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xchgl (%esp), %ecx # get vector number
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bt %ecx, ASM_PFX(mErrorCodeFlag)
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jnc NoErrorData
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pushl (%esp) # addition push if exception data needed
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NoErrorData:
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xchg (%esp), %ecx # restore ecx
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pushl %eax
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#---------------------------------------;
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# CommonInterruptEntry ;
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#---------------------------------------;
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# The follow algorithm is used for the common interrupt routine.
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ASM_GLOBAL ASM_PFX(CommonInterruptEntry)
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ASM_PFX(CommonInterruptEntry):
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cli
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popl %eax
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#
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# All interrupt handlers are invoked through interrupt gates, so
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# IF flag automatically cleared at the entry point
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#
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#
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# Get vector number from top of stack
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#
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xchgl (%esp), %ecx
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andl $0x0FF, %ecx # Vector number should be less than 256
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cmpl $32, %ecx # Intel reserved vector for exceptions?
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jae NoErrorCode
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bt %ecx, ASM_PFX(mErrorCodeFlag)
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jc HasErrorCode
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NoErrorCode:
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#
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# Stack:
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# +---------------------+
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# + EFlags +
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# +---------------------+
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# + CS +
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# +---------------------+
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# + EIP +
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# +---------------------+
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# + ECX +
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# +---------------------+ <-- ESP
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#
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# Registers:
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# ECX - Vector Number
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#
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#
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# Put Vector Number on stack
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#
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pushl %ecx
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#
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# Put 0 (dummy) error code on stack, and restore ECX
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#
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xorl %ecx, %ecx # ECX = 0
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xchgl 4(%esp), %ecx
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jmp ErrorCodeAndVectorOnStack
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HasErrorCode:
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#
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# Stack:
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# +---------------------+
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# + EFlags +
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# +---------------------+
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# + CS +
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# +---------------------+
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# + EIP +
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# +---------------------+
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# + Error Code +
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# +---------------------+
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# + ECX +
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# +---------------------+ <-- ESP
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#
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# Registers:
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# ECX - Vector Number
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#
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#
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# Put Vector Number on stack and restore ECX
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#
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xchgl (%esp), %ecx
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ErrorCodeAndVectorOnStack:
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pushl %ebp
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movl %esp, %ebp
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#
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# Stack:
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# +---------------------+
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# + EFlags +
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# +---------------------+
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# + CS +
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# +---------------------+
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# + EIP +
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# +---------------------+
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# + Error Code +
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# +---------------------+
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# + Vector Number +
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# +---------------------+
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# + EBP +
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# +---------------------+ <-- EBP
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#
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#
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# Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
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# is 16-byte aligned
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#
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andl $0x0fffffff0, %esp
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subl $12, %esp
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subl $8, %esp
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pushl $0 # check EXCEPTION_HANDLER_CONTEXT.OldIdtHandler
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pushl $0 # check EXCEPTION_HANDLER_CONTEXT.ExceptionDataFlag
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#; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
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pushl %eax
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pushl %ecx
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pushl %edx
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pushl %ebx
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leal 24(%ebp), %ecx
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pushl %ecx # ESP
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pushl (%ebp) # EBP
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pushl %esi
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pushl %edi
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#; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
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movl %ss, %eax
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pushl %eax
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movzwl 16(%ebp), %eax
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pushl %eax
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movl %ds, %eax
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pushl %eax
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movl %es, %eax
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pushl %eax
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movl %fs, %eax
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pushl %eax
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movl %gs, %eax
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pushl %eax
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#; UINT32 Eip;
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movl 12(%ebp), %eax
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pushl %eax
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#; UINT32 Gdtr[2], Idtr[2];
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subl $8, %esp
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sidt (%esp)
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movl 2(%esp), %eax
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xchgl (%esp), %eax
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andl $0x0FFFF, %eax
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movl %eax, 4(%esp)
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subl $8, %esp
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sgdt (%esp)
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movl 2(%esp), %eax
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xchgl (%esp), %eax
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andl $0x0FFFF, %eax
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movl %eax, 4(%esp)
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#; UINT32 Ldtr, Tr;
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xorl %eax, %eax
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str %ax
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pushl %eax
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sldt %ax
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pushl %eax
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#; UINT32 EFlags;
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movl 20(%ebp), %eax
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pushl %eax
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#; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
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movl %cr4, %eax
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orl $0x208, %eax
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movl %eax, %cr4
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pushl %eax
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movl %cr3, %eax
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pushl %eax
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movl %cr2, %eax
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pushl %eax
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xorl %eax, %eax
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pushl %eax
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movl %cr0, %eax
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pushl %eax
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#; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
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movl %dr7, %eax
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pushl %eax
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movl %dr6, %eax
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pushl %eax
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movl %dr3, %eax
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pushl %eax
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movl %dr2, %eax
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pushl %eax
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movl %dr1, %eax
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pushl %eax
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movl %dr0, %eax
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pushl %eax
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#; FX_SAVE_STATE_IA32 FxSaveState;
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subl $512, %esp
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movl %esp, %edi
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.byte 0x0f, 0x0ae, 0x07 #fxsave [edi]
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#; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
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cld
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#; UINT32 ExceptionData;
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pushl 8(%ebp)
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#; Prepare parameter and call
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movl %esp, %edx
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pushl %edx
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movl 4(%ebp), %edx
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pushl %edx
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#
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# Call External Exception Handler
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#
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call ASM_PFX(CommonExceptionHandler)
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addl $8, %esp
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cli
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#; UINT32 ExceptionData;
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addl $4, %esp
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#; FX_SAVE_STATE_IA32 FxSaveState;
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movl %esp, %esi
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.byte 0x0f, 0x0ae, 0x0e # fxrstor [esi]
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addl $512, %esp
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#; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
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#; Skip restoration of DRx registers to support in-circuit emualators
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#; or debuggers set breakpoint in interrupt/exception context
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addl $24, %esp
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#; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
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popl %eax
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movl %eax, %cr0
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addl $4, %esp # not for Cr1
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popl %eax
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movl %eax, %cr2
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popl %eax
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movl %eax, %cr3
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popl %eax
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movl %eax, %cr4
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#; UINT32 EFlags;
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popl 20(%ebp)
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#; UINT32 Ldtr, Tr;
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#; UINT32 Gdtr[2], Idtr[2];
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#; Best not let anyone mess with these particular registers...
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addl $24, %esp
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#; UINT32 Eip;
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popl 12(%ebp)
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#; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
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#; NOTE - modified segment registers could hang the debugger... We
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#; could attempt to insulate ourselves against this possibility,
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#; but that poses risks as well.
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#;
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popl %gs
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popl %fs
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popl %es
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popl %ds
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popl 16(%ebp)
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popl %ss
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#; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
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popl %edi
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popl %esi
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addl $4, %esp # not for ebp
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addl $4, %esp # not for esp
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popl %ebx
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popl %edx
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popl %ecx
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popl %eax
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popl -8(%ebp)
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popl -4(%ebp)
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movl %ebp, %esp
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popl %ebp
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addl $8, %esp
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cmpl $0, -16(%esp) # check EXCEPTION_HANDLER_CONTEXT.OldIdtHandler
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jz DoReturn
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cmpl $1, -20(%esp) # check EXCEPTION_HANDLER_CONTEXT.ExceptionDataFlag
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jz ErrorCode
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jmp *-16(%esp)
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ErrorCode:
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subl $4, %esp
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jmp *-12(%esp)
|
|
|
|
DoReturn:
|
|
cmpl $0, ASM_PFX(mDoFarReturnFlag)
|
|
jz DoIret
|
|
pushl 8(%esp) # save EFLAGS
|
|
addl $16, %esp
|
|
pushl -8(%esp) # save CS in new location
|
|
pushl -8(%esp) # save EIP in new location
|
|
pushl -8(%esp) # save EFLAGS in new location
|
|
popfl # restore EFLAGS
|
|
retf # far return
|
|
|
|
DoIret:
|
|
iretl
|
|
|
|
|
|
#---------------------------------------;
|
|
# _AsmGetTemplateAddressMap ;
|
|
#---------------------------------------;
|
|
#
|
|
# Protocol prototype
|
|
# AsmGetTemplateAddressMap (
|
|
# EXCEPTION_HANDLER_TEMPLATE_MAP *AddressMap
|
|
# );
|
|
#
|
|
# Routine Description:
|
|
#
|
|
# Return address map of interrupt handler template so that C code can generate
|
|
# interrupt table.
|
|
#
|
|
# Arguments:
|
|
#
|
|
#
|
|
# Returns:
|
|
#
|
|
# Nothing
|
|
#
|
|
#
|
|
# Input: [ebp][0] = Original ebp
|
|
# [ebp][4] = Return address
|
|
#
|
|
# Output: Nothing
|
|
#
|
|
# Destroys: Nothing
|
|
#-----------------------------------------------------------------------------;
|
|
#-------------------------------------------------------------------------------------
|
|
# AsmGetAddressMap (&AddressMap);
|
|
#-------------------------------------------------------------------------------------
|
|
ASM_GLOBAL ASM_PFX(AsmGetTemplateAddressMap)
|
|
ASM_PFX(AsmGetTemplateAddressMap):
|
|
|
|
pushl %ebp
|
|
movl %esp,%ebp
|
|
pushal
|
|
|
|
movl 0x8(%ebp), %ebx
|
|
movl $Exception0Handle, (%ebx)
|
|
movl $(Exception1Handle - Exception0Handle), 0x4(%ebx)
|
|
movl $(HookAfterStubBegin), 0x8(%ebx)
|
|
|
|
popal
|
|
popl %ebp
|
|
ret
|
|
#-------------------------------------------------------------------------------------
|
|
# AsmVectorNumFixup (*VectorBase, VectorNum, HookStub);
|
|
#-------------------------------------------------------------------------------------
|
|
ASM_GLOBAL ASM_PFX(AsmVectorNumFixup)
|
|
ASM_PFX(AsmVectorNumFixup):
|
|
movl 8(%esp), %eax
|
|
movl 4(%esp), %ecx
|
|
movb %al, (VectorNum - HookAfterStubBegin)(%ecx)
|
|
ret
|