Initial import.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bbahnsen
547
EdkModulePkg/Universal/DebugSupport/Dxe/ia32/AsmFuncs.asm
Normal file
547
EdkModulePkg/Universal/DebugSupport/Dxe/ia32/AsmFuncs.asm
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@@ -0,0 +1,547 @@
|
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;******************************************************************************
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;*
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;* Copyright (c) 2006, Intel Corporation
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;* All rights reserved. This program and the accompanying materials
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;* 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
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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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;******************************************************************************
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.586p
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.MODEL FLAT, C
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EXCPT32_DIVIDE_ERROR EQU 0
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EXCPT32_DEBUG EQU 1
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EXCPT32_NMI EQU 2
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EXCPT32_BREAKPOINT EQU 3
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EXCPT32_OVERFLOW EQU 4
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EXCPT32_BOUND EQU 5
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EXCPT32_INVALID_OPCODE EQU 6
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EXCPT32_DOUBLE_FAULT EQU 8
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EXCPT32_INVALID_TSS EQU 10
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EXCPT32_SEG_NOT_PRESENT EQU 11
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EXCPT32_STACK_FAULT EQU 12
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EXCPT32_GP_FAULT EQU 13
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EXCPT32_PAGE_FAULT EQU 14
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EXCPT32_FP_ERROR EQU 16
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EXCPT32_ALIGNMENT_CHECK EQU 17
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EXCPT32_MACHINE_CHECK EQU 18
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EXCPT32_SIMD EQU 19
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FXSTOR_FLAG EQU 01000000h ; bit cpuid 24 of feature flags
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;; The FXSTOR and FXRSTOR commands are used for saving and restoring the x87,
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;; MMX, SSE, SSE2, etc registers. The initialization of the debugsupport driver
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;; MUST check the CPUID feature flags to see that these instructions are available
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;; and fail to init if they are not.
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;; fxstor [edi]
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FXSTOR_EDI MACRO
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db 0fh, 0aeh, 00000111y ; mod = 00, reg/op = 000, r/m = 111 = [edi]
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ENDM
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;; fxrstor [esi]
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FXRSTOR_ESI MACRO
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db 0fh, 0aeh, 00001110y ; mod = 00, reg/op = 001, r/m = 110 = [esi]
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ENDM
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.DATA
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public OrigVector, InterruptEntryStub, StubSize, CommonIdtEntry, FxStorSupport
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StubSize dd InterruptEntryStubEnd - InterruptEntryStub
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AppEsp dd 11111111h ; ?
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DebugEsp dd 22222222h ; ?
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ExtraPush dd 33333333h ; ?
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ExceptData dd 44444444h ; ?
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Eflags dd 55555555h ; ?
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OrigVector dd 66666666h ; ?
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;; The declarations below define the memory region that will be used for the debug stack.
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;; The context record will be built by pushing register values onto this stack.
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;; It is imparitive that alignment be carefully managed, since the FXSTOR and
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;; FXRSTOR instructions will GP fault if their memory operand is not 16 byte aligned.
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;;
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;; The stub will switch stacks from the application stack to the debuger stack
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;; and pushes the exception number.
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;;
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;; Then we building the context record on the stack. Since the stack grows down,
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;; we push the fields of the context record from the back to the front. There
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;; are 132 bytes of stack used prior allocating the 512 bytes of stack to be
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;; used as the memory buffer for the fxstor instruction. Therefore address of
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;; the buffer used for the FXSTOR instruction is &Eax - 132 - 512, which
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;; must be 16 byte aligned.
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;;
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;; We carefully locate the stack to make this happen.
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;;
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;; For reference, the context structure looks like this:
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;; struct {
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;; UINT32 ExceptionData;
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;; FX_SAVE_STATE FxSaveState; // 512 bytes, must be 16 byte aligned
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;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
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;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
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;; UINT32 Ldtr, Tr;
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;; UINT64 Gdtr, Idtr;
|
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;; UINT32 EFlags;
|
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;; UINT32 Eip;
|
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;; UINT32 SegGs, SegFs, SegEs, SegDs, SegCs, SegSs;
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;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
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;; } SYSTEM_CONTEXT_IA32; // 32 bit system context record
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align 16
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DebugStackEnd db "DbgStkEnd >>>>>>" ;; 16 byte long string - must be 16 bytes to preserve alignment
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dd 1ffdh dup (000000000h) ;; 32K should be enough stack
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;; This allocation is coocked to insure
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;; that the the buffer for the FXSTORE instruction
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;; will be 16 byte aligned also.
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;;
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ExceptionNumber dd ? ;; first entry will be the vector number pushed by the stub
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DebugStackBegin db "<<<< DbgStkBegin" ;; initial debug ESP == DebugStackBegin, set in stub
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.CODE
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externdef InterruptDistrubutionHub:near
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;------------------------------------------------------------------------------
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; BOOLEAN
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; FxStorSupport (
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; void
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; )
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;
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; Abstract: Returns TRUE if FxStor instructions are supported
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;
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FxStorSupport PROC C PUBLIC
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;
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; cpuid corrupts ebx which must be preserved per the C calling convention
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;
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push ebx
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mov eax, 1
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cpuid
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mov eax, edx
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and eax, FXSTOR_FLAG
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shr eax, 24
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pop ebx
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ret
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FxStorSupport ENDP
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;------------------------------------------------------------------------------
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; DESCRIPTOR *
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; GetIdtr (
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; void
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; )
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;
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; Abstract: Returns physical address of IDTR
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;
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GetIdtr PROC C PUBLIC
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LOCAL IdtrBuf:FWORD
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sidt IdtrBuf
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mov eax, DWORD PTR IdtrBuf + 2
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ret
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GetIdtr ENDP
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;------------------------------------------------------------------------------
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; BOOLEAN
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; WriteInterruptFlag (
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; BOOLEAN NewState
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; )
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;
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; Abstract: Programs interrupt flag to the requested state and returns previous
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; state.
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;
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WriteInterruptFlag PROC C PUBLIC State:DWORD
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pushfd
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pop eax
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and eax, 200h
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shr eax, 9
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mov ecx, State
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.IF ecx == 0
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cli
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.ELSE
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sti
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.ENDIF
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ret
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WriteInterruptFlag ENDP
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||||
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||||
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||||
;------------------------------------------------------------------------------
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; void
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; Vect2Desc (
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; DESCRIPTOR * DestDesc,
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; void (*Vector) (void)
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; )
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;
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||||
; Abstract: Encodes an IDT descriptor with the given physical address
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;
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Vect2Desc PROC C PUBLIC DestPtr:DWORD, Vector:DWORD
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mov eax, Vector
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mov ecx, DestPtr
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mov word ptr [ecx], ax ; write bits 15..0 of offset
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mov word ptr [ecx+2], 20h ; SYS_CODE_SEL from GDT
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mov word ptr [ecx+4], 0e00h OR 8000h ; type = 386 interrupt gate, present
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shr eax, 16
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mov word ptr [ecx+6], ax ; write bits 31..16 of offset
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ret
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Vect2Desc ENDP
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|
||||
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||||
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||||
;------------------------------------------------------------------------------
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||||
; InterruptEntryStub
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;
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||||
; Abstract: This code is not a function, but is a small piece of code that is
|
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; copied and fixed up once for each IDT entry that is hooked.
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;
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InterruptEntryStub::
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mov AppEsp, esp ; save stack top
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mov esp, offset DebugStackBegin ; switch to debugger stack
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push 0 ; push vector number - will be modified before installed
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db 0e9h ; jump rel32
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dd 0 ; fixed up to relative address of CommonIdtEntry
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InterruptEntryStubEnd:
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|
||||
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||||
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;------------------------------------------------------------------------------
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||||
; CommonIdtEntry
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;
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; Abstract: This code is not a function, but is the common part for all IDT
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; vectors.
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;
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CommonIdtEntry::
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;;
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;; At this point, the stub has saved the current application stack esp into AppEsp
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;; and switched stacks to the debug stack, where it pushed the vector number
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;;
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;; The application stack looks like this:
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;;
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;; ...
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;; (last application stack entry)
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;; eflags from interrupted task
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;; CS from interrupted task
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;; EIP from interrupted task
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;; Error code <-------------------- Only present for some exeption types
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;;
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;;
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;; The stub switched us to the debug stack and pushed the interrupt number.
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;;
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;; Next, construct the context record. It will be build on the debug stack by
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;; pushing the registers in the correct order so as to create the context structure
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;; on the debug stack. The context record must be built from the end back to the
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;; beginning because the stack grows down...
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;
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;; For reference, the context record looks like this:
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;;
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;; typedef
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;; struct {
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||||
;; UINT32 ExceptionData;
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;; FX_SAVE_STATE FxSaveState;
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;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
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;; UINT32 Cr0, Cr2, Cr3, Cr4;
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;; UINT32 Ldtr, Tr;
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;; UINT64 Gdtr, Idtr;
|
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;; UINT32 EFlags;
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;; UINT32 Eip;
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;; UINT32 SegGs, SegFs, SegEs, SegDs, SegCs, SegSs;
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;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
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;; } SYSTEM_CONTEXT_IA32; // 32 bit system context record
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||||
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;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
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pushad
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;; Save interrupt state eflags register...
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pushfd
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pop eax
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mov dword ptr Eflags, eax
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||||
;; We need to determine if any extra data was pushed by the exception, and if so, save it
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;; To do this, we check the exception number pushed by the stub, and cache the
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;; result in a variable since we'll need this again.
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.IF ExceptionNumber == EXCPT32_DOUBLE_FAULT
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mov ExtraPush, 1
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.ELSEIF ExceptionNumber == EXCPT32_INVALID_TSS
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mov ExtraPush, 1
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.ELSEIF ExceptionNumber == EXCPT32_SEG_NOT_PRESENT
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mov ExtraPush, 1
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.ELSEIF ExceptionNumber == EXCPT32_STACK_FAULT
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mov ExtraPush, 1
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.ELSEIF ExceptionNumber == EXCPT32_GP_FAULT
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mov ExtraPush, 1
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.ELSEIF ExceptionNumber == EXCPT32_PAGE_FAULT
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mov ExtraPush, 1
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.ELSEIF ExceptionNumber == EXCPT32_ALIGNMENT_CHECK
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mov ExtraPush, 1
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.ELSE
|
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mov ExtraPush, 0
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||||
.ENDIF
|
||||
|
||||
;; If there's some extra data, save it also, and modify the saved AppEsp to effectively
|
||||
;; pop this value off the application's stack.
|
||||
.IF ExtraPush == 1
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||||
mov eax, AppEsp
|
||||
mov ebx, [eax]
|
||||
mov ExceptData, ebx
|
||||
add eax, 4
|
||||
mov AppEsp, eax
|
||||
.ELSE
|
||||
mov ExceptData, 0
|
||||
.ENDIF
|
||||
|
||||
;; The "pushad" above pushed the debug stack esp. Since what we're actually doing
|
||||
;; is building the context record on the debug stack, we need to save the pushed
|
||||
;; debug ESP, and replace it with the application's last stack entry...
|
||||
mov eax, [esp + 12]
|
||||
mov DebugEsp, eax
|
||||
mov eax, AppEsp
|
||||
add eax, 12
|
||||
; application stack has eflags, cs, & eip, so
|
||||
; last actual application stack entry is
|
||||
; 12 bytes into the application stack.
|
||||
mov [esp + 12], eax
|
||||
|
||||
;; continue building context record
|
||||
;; UINT32 Gs, Fs, Es, Ds, Cs, Ss; insure high 16 bits of each is zero
|
||||
mov eax, ss
|
||||
push eax
|
||||
|
||||
; CS from application is one entry back in application stack
|
||||
mov eax, AppEsp
|
||||
movzx eax, word ptr [eax + 4]
|
||||
push eax
|
||||
|
||||
mov eax, ds
|
||||
push eax
|
||||
mov eax, es
|
||||
push eax
|
||||
mov eax, fs
|
||||
push eax
|
||||
mov eax, gs
|
||||
push eax
|
||||
|
||||
;; UINT32 Eip;
|
||||
; Eip from application is on top of application stack
|
||||
mov eax, AppEsp
|
||||
push dword ptr [eax]
|
||||
|
||||
;; UINT64 Gdtr, Idtr;
|
||||
push 0
|
||||
push 0
|
||||
sidt fword ptr [esp]
|
||||
push 0
|
||||
push 0
|
||||
sgdt fword ptr [esp]
|
||||
|
||||
;; UINT32 Ldtr, Tr;
|
||||
xor eax, eax
|
||||
str ax
|
||||
push eax
|
||||
sldt ax
|
||||
push eax
|
||||
|
||||
;; UINT32 EFlags;
|
||||
;; Eflags from application is two entries back in application stack
|
||||
mov eax, AppEsp
|
||||
push dword ptr [eax + 8]
|
||||
|
||||
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
;; insure FXSAVE/FXRSTOR is enabled in CR4...
|
||||
;; ... while we're at it, make sure DE is also enabled...
|
||||
mov eax, cr4
|
||||
or eax, 208h
|
||||
mov cr4, eax
|
||||
push eax
|
||||
mov eax, cr3
|
||||
push eax
|
||||
mov eax, cr2
|
||||
push eax
|
||||
push 0
|
||||
mov eax, cr0
|
||||
push eax
|
||||
|
||||
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
mov eax, dr7
|
||||
push eax
|
||||
;; clear Dr7 while executing debugger itself
|
||||
xor eax, eax
|
||||
mov dr7, eax
|
||||
|
||||
mov eax, dr6
|
||||
push eax
|
||||
;; insure all status bits in dr6 are clear...
|
||||
xor eax, eax
|
||||
mov dr6, eax
|
||||
|
||||
mov eax, dr3
|
||||
push eax
|
||||
mov eax, dr2
|
||||
push eax
|
||||
mov eax, dr1
|
||||
push eax
|
||||
mov eax, dr0
|
||||
push eax
|
||||
|
||||
;; FX_SAVE_STATE FxSaveState;
|
||||
sub esp, 512
|
||||
mov edi, esp
|
||||
; IMPORTANT!! The debug stack has been carefully constructed to
|
||||
; insure that esp and edi are 16 byte aligned when we get here.
|
||||
; They MUST be. If they are not, a GP fault will occur.
|
||||
FXSTOR_EDI
|
||||
|
||||
;; UINT32 ExceptionData;
|
||||
mov eax, ExceptData
|
||||
push eax
|
||||
|
||||
; call to C code which will in turn call registered handler
|
||||
; pass in the vector number
|
||||
mov eax, esp
|
||||
push eax
|
||||
mov eax, ExceptionNumber
|
||||
push eax
|
||||
call InterruptDistrubutionHub
|
||||
add esp, 8
|
||||
|
||||
; restore context...
|
||||
;; UINT32 ExceptionData;
|
||||
add esp, 4
|
||||
|
||||
;; FX_SAVE_STATE FxSaveState;
|
||||
mov esi, esp
|
||||
FXRSTOR_ESI
|
||||
add esp, 512
|
||||
|
||||
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
pop eax
|
||||
mov dr0, eax
|
||||
pop eax
|
||||
mov dr1, eax
|
||||
pop eax
|
||||
mov dr2, eax
|
||||
pop eax
|
||||
mov dr3, eax
|
||||
;; skip restore of dr6. We cleared dr6 during the context save.
|
||||
add esp, 4
|
||||
pop eax
|
||||
mov dr7, eax
|
||||
|
||||
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
pop eax
|
||||
mov cr0, eax
|
||||
add esp, 4
|
||||
pop eax
|
||||
mov cr2, eax
|
||||
pop eax
|
||||
mov cr3, eax
|
||||
pop eax
|
||||
mov cr4, eax
|
||||
|
||||
;; UINT32 EFlags;
|
||||
mov eax, AppEsp
|
||||
pop dword ptr [eax + 8]
|
||||
|
||||
;; UINT16 Ldtr, Tr;
|
||||
;; UINT64 Gdtr, Idtr;
|
||||
;; Best not let anyone mess with these particular registers...
|
||||
add esp, 24
|
||||
|
||||
;; UINT32 Eip;
|
||||
pop dword ptr [eax]
|
||||
|
||||
;; UINT32 SegGs, SegFs, SegEs, SegDs, SegCs, SegSs;
|
||||
;; NOTE - modified segment registers could hang the debugger... We
|
||||
;; could attempt to insulate ourselves against this possibility,
|
||||
;; but that poses risks as well.
|
||||
;;
|
||||
|
||||
pop gs
|
||||
pop fs
|
||||
pop es
|
||||
pop ds
|
||||
pop [eax + 4]
|
||||
pop ss
|
||||
|
||||
;; The next stuff to restore is the general purpose registers that were pushed
|
||||
;; using the pushad instruction.
|
||||
;;
|
||||
;; The value of ESP as stored in the context record is the application ESP
|
||||
;; including the 3 entries on the application stack caused by the exception
|
||||
;; itself. It may have been modified by the debug agent, so we need to
|
||||
;; determine if we need to relocate the application stack.
|
||||
|
||||
mov ebx, [esp + 12] ; move the potentially modified AppEsp into ebx
|
||||
mov eax, AppEsp
|
||||
add eax, 12
|
||||
cmp ebx, eax
|
||||
je NoAppStackMove
|
||||
|
||||
mov eax, AppEsp
|
||||
mov ecx, [eax] ; EIP
|
||||
mov [ebx], ecx
|
||||
|
||||
mov ecx, [eax + 4] ; CS
|
||||
mov [ebx + 4], ecx
|
||||
|
||||
mov ecx, [eax + 8] ; EFLAGS
|
||||
mov [ebx + 8], ecx
|
||||
|
||||
mov eax, ebx ; modify the saved AppEsp to the new AppEsp
|
||||
mov AppEsp, eax
|
||||
NoAppStackMove:
|
||||
mov eax, DebugEsp ; restore the DebugEsp on the debug stack
|
||||
; so our popad will not cause a stack switch
|
||||
mov [esp + 12], eax
|
||||
|
||||
cmp ExceptionNumber, 068h
|
||||
jne NoChain
|
||||
|
||||
Chain:
|
||||
|
||||
;; Restore eflags so when we chain, the flags will be exactly as if we were never here.
|
||||
;; We gin up the stack to do an iretd so we can get ALL the flags.
|
||||
mov eax, AppEsp
|
||||
mov ebx, [eax + 8]
|
||||
and ebx, NOT 300h ; special handling for IF and TF
|
||||
push ebx
|
||||
push cs
|
||||
push PhonyIretd
|
||||
iretd
|
||||
PhonyIretd:
|
||||
|
||||
;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
popad
|
||||
|
||||
;; Switch back to application stack
|
||||
mov esp, AppEsp
|
||||
|
||||
;; Jump to original handler
|
||||
jmp OrigVector
|
||||
|
||||
NoChain:
|
||||
;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
popad
|
||||
|
||||
;; Switch back to application stack
|
||||
mov esp, AppEsp
|
||||
|
||||
;; We're outa here...
|
||||
iretd
|
||||
END
|
||||
|
||||
|
||||
|
||||
440
EdkModulePkg/Universal/DebugSupport/Dxe/ia32/plDebugSupport.c
Normal file
440
EdkModulePkg/Universal/DebugSupport/Dxe/ia32/plDebugSupport.c
Normal file
@@ -0,0 +1,440 @@
|
||||
/*++
|
||||
|
||||
Copyright (c) 2006, 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:
|
||||
|
||||
plDebugSupport.c
|
||||
|
||||
Abstract:
|
||||
|
||||
IA32 specific debug support functions
|
||||
|
||||
Revision History
|
||||
|
||||
--*/
|
||||
|
||||
//
|
||||
// private header files
|
||||
//
|
||||
#include "plDebugSupport.h"
|
||||
|
||||
//
|
||||
// This the global main table to keep track of the interrupts
|
||||
//
|
||||
IDT_ENTRY *IdtEntryTable = NULL;
|
||||
DESCRIPTOR NullDesc = 0;
|
||||
|
||||
#ifndef EFI_NT_EMULATOR
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
CreateEntryStub (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
OUT VOID **Stub
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description: Allocate pool for a new IDT entry stub. Copy the generic
|
||||
stub into the new buffer and fixup the vector number and jump target address.
|
||||
|
||||
Arguments:
|
||||
ExceptionType - This is the exception type that the new stub will be created
|
||||
for.
|
||||
Stub - On successful exit, *Stub contains the newly allocated entry stub.
|
||||
Returns:
|
||||
Typically EFI_SUCCESS
|
||||
other possibilities are passed through from AllocatePool
|
||||
|
||||
--*/
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
UINT8 *StubCopy;
|
||||
|
||||
//
|
||||
// First, allocate a new buffer and copy the stub code into it
|
||||
//
|
||||
Status = gBS->AllocatePool (EfiBootServicesData, StubSize, Stub);
|
||||
if (Status == EFI_SUCCESS) {
|
||||
StubCopy = *Stub;
|
||||
gBS->CopyMem (StubCopy, InterruptEntryStub, StubSize);
|
||||
|
||||
//
|
||||
// Next fixup the stub code for this vector
|
||||
//
|
||||
|
||||
// The stub code looks like this:
|
||||
//
|
||||
// 00000000 89 25 00000004 R mov AppEsp, esp ; save stack top
|
||||
// 00000006 BC 00008014 R mov esp, offset DbgStkBot ; switch to debugger stack
|
||||
// 0000000B 6A 00 push 0 ; push vector number - will be modified before installed
|
||||
// 0000000D E9 db 0e9h ; jump rel32
|
||||
// 0000000E 00000000 dd 0 ; fixed up to relative address of CommonIdtEntry
|
||||
//
|
||||
|
||||
//
|
||||
// poke in the exception type so the second push pushes the exception type
|
||||
//
|
||||
StubCopy[0x0c] = (UINT8) ExceptionType;
|
||||
|
||||
//
|
||||
// fixup the jump target to point to the common entry
|
||||
//
|
||||
*(UINT32 *) &StubCopy[0x0e] = (UINT32) CommonIdtEntry - (UINT32) &StubCopy[StubSize];
|
||||
}
|
||||
|
||||
return Status;
|
||||
}
|
||||
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
HookEntry (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType,
|
||||
IN VOID (*NewCallback) ()
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
Creates a nes entry stub. Then saves the current IDT entry and replaces it
|
||||
with an interrupt gate for the new entry point. The IdtEntryTable is updated
|
||||
with the new registered function.
|
||||
|
||||
This code executes in boot services context. The stub entry executes in interrupt
|
||||
context.
|
||||
|
||||
Arguments:
|
||||
ExceptionType - specifies which vector to hook.
|
||||
NewCallback - a pointer to the new function to be registered.
|
||||
|
||||
Returns:
|
||||
EFI_SUCCESS
|
||||
Other possibilities are passed through by CreateEntryStub
|
||||
|
||||
--*/
|
||||
// TODO: ) - add argument and description to function comment
|
||||
{
|
||||
BOOLEAN OldIntFlagState;
|
||||
EFI_STATUS Status;
|
||||
|
||||
Status = CreateEntryStub (ExceptionType, (VOID **) &IdtEntryTable[ExceptionType].StubEntry);
|
||||
if (Status == EFI_SUCCESS) {
|
||||
OldIntFlagState = WriteInterruptFlag (0);
|
||||
ReadIdt (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
|
||||
|
||||
((UINT16 *) &IdtEntryTable[ExceptionType].OrigVector)[0] = ((UINT16 *) &IdtEntryTable[ExceptionType].OrigDesc)[0];
|
||||
((UINT16 *) &IdtEntryTable[ExceptionType].OrigVector)[1] = ((UINT16 *) &IdtEntryTable[ExceptionType].OrigDesc)[3];
|
||||
|
||||
Vect2Desc (&IdtEntryTable[ExceptionType].NewDesc, IdtEntryTable[ExceptionType].StubEntry);
|
||||
IdtEntryTable[ExceptionType].RegisteredCallback = NewCallback;
|
||||
WriteIdt (ExceptionType, &(IdtEntryTable[ExceptionType].NewDesc));
|
||||
WriteInterruptFlag (OldIntFlagState);
|
||||
}
|
||||
|
||||
return Status;
|
||||
}
|
||||
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
UnhookEntry (
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
Undoes HookEntry. This code executes in boot services context.
|
||||
|
||||
Arguments:
|
||||
ExceptionType - specifies which entry to unhook
|
||||
|
||||
Returns:
|
||||
EFI_SUCCESS
|
||||
Other values are passed through from FreePool
|
||||
|
||||
--*/
|
||||
{
|
||||
BOOLEAN OldIntFlagState;
|
||||
EFI_STATUS Status;
|
||||
|
||||
OldIntFlagState = WriteInterruptFlag (0);
|
||||
WriteIdt (ExceptionType, &(IdtEntryTable[ExceptionType].OrigDesc));
|
||||
Status = gBS->FreePool ((VOID *) (UINTN) IdtEntryTable[ExceptionType].StubEntry);
|
||||
ZeroMem (&IdtEntryTable[ExceptionType], sizeof (IDT_ENTRY));
|
||||
WriteInterruptFlag (OldIntFlagState);
|
||||
|
||||
return (Status);
|
||||
}
|
||||
#endif
|
||||
|
||||
EFI_STATUS
|
||||
ManageIdtEntryTable (
|
||||
VOID (*NewCallback)(),
|
||||
EFI_EXCEPTION_TYPE ExceptionType
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
This is the main worker function that manages the state of the interrupt
|
||||
handlers. It both installs and uninstalls interrupt handlers based on the
|
||||
value of NewCallback. If NewCallback is NULL, then uninstall is indicated.
|
||||
If NewCallback is non-NULL, then install is indicated.
|
||||
|
||||
Arguments:
|
||||
NewCallback - If non-NULL, NewCallback specifies the new handler to register.
|
||||
If NULL, specifies that the previously registered handler should
|
||||
be uninstalled.
|
||||
ExceptionType - Indicates which entry to manage
|
||||
|
||||
Returns:
|
||||
EFI_SUCCESS
|
||||
EFI_INVALID_PARAMETER - requested uninstalling a handler from a vector that has
|
||||
no handler registered for it
|
||||
EFI_ALREADY_STARTED - requested install to a vector that already has a handler registered.
|
||||
|
||||
Other possible return values are passed through from UnHookEntry and HookEntry.
|
||||
|
||||
--*/
|
||||
// TODO: ) - add argument and description to function comment
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
Status = EFI_SUCCESS;
|
||||
|
||||
#ifndef EFI_NT_EMULATOR
|
||||
if (CompareDescriptor (&IdtEntryTable[ExceptionType].NewDesc, &NullDesc)) {
|
||||
//
|
||||
// we've already installed to this vector
|
||||
//
|
||||
if (NewCallback != NULL) {
|
||||
//
|
||||
// if the input handler is non-null, error
|
||||
//
|
||||
Status = EFI_ALREADY_STARTED;
|
||||
} else {
|
||||
Status = UnhookEntry (ExceptionType);
|
||||
}
|
||||
} else {
|
||||
//
|
||||
// no user handler installed on this vector
|
||||
//
|
||||
if (NewCallback == NULL) {
|
||||
//
|
||||
// if the input handler is null, error
|
||||
//
|
||||
Status = EFI_INVALID_PARAMETER;
|
||||
} else {
|
||||
Status = HookEntry (ExceptionType, NewCallback);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
return Status;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
GetMaximumProcessorIndex (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
OUT UINTN *MaxProcessorIndex
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description: This is a DebugSupport protocol member function.
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns: Always returns EFI_SUCCESS with *MaxProcessorIndex set to 0
|
||||
|
||||
--*/
|
||||
// TODO: This - add argument and description to function comment
|
||||
// TODO: MaxProcessorIndex - add argument and description to function comment
|
||||
{
|
||||
*MaxProcessorIndex = 0;
|
||||
return (EFI_SUCCESS);
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
RegisterPeriodicCallback (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
IN UINTN ProcessorIndex,
|
||||
IN EFI_PERIODIC_CALLBACK PeriodicCallback
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description: This is a DebugSupport protocol member function.
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns:
|
||||
|
||||
--*/
|
||||
// TODO: This - add argument and description to function comment
|
||||
// TODO: ProcessorIndex - add argument and description to function comment
|
||||
// TODO: PeriodicCallback - add argument and description to function comment
|
||||
{
|
||||
return ManageIdtEntryTable (PeriodicCallback, SYSTEM_TIMER_VECTOR);
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
RegisterExceptionCallback (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
IN UINTN ProcessorIndex,
|
||||
IN EFI_EXCEPTION_CALLBACK NewCallback,
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
This is a DebugSupport protocol member function.
|
||||
|
||||
This code executes in boot services context.
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns:
|
||||
|
||||
None
|
||||
|
||||
--*/
|
||||
// TODO: This - add argument and description to function comment
|
||||
// TODO: ProcessorIndex - add argument and description to function comment
|
||||
// TODO: NewCallback - add argument and description to function comment
|
||||
// TODO: ExceptionType - add argument and description to function comment
|
||||
{
|
||||
return ManageIdtEntryTable (NewCallback, ExceptionType);
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
InvalidateInstructionCache (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
IN UINTN ProcessorIndex,
|
||||
IN VOID *Start,
|
||||
IN UINT64 Length
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
This is a DebugSupport protocol member function.
|
||||
For IA32, this is a no-op since the instruction and data caches are coherent.
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns:
|
||||
|
||||
None
|
||||
|
||||
--*/
|
||||
// TODO: This - add argument and description to function comment
|
||||
// TODO: ProcessorIndex - add argument and description to function comment
|
||||
// TODO: Start - add argument and description to function comment
|
||||
// TODO: Length - add argument and description to function comment
|
||||
// TODO: EFI_SUCCESS - add return value to function comment
|
||||
{
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
plInitializeDebugSupportDriver (
|
||||
VOID
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
Initializes driver's handler registration database.
|
||||
|
||||
This code executes in boot services context.
|
||||
|
||||
Arguments:
|
||||
None
|
||||
|
||||
Returns:
|
||||
EFI_SUCCESS
|
||||
EFI_UNSUPPORTED - if IA32 processor does not support FXSTOR/FXRSTOR instructions,
|
||||
the context save will fail, so these processor's are not supported.
|
||||
|
||||
--*/
|
||||
// TODO: EFI_OUT_OF_RESOURCES - add return value to function comment
|
||||
{
|
||||
if (!FxStorSupport ()) {
|
||||
return EFI_UNSUPPORTED;
|
||||
} else {
|
||||
IdtEntryTable = AllocateZeroPool (sizeof (IDT_ENTRY) * NUM_IDT_ENTRIES);
|
||||
if (IdtEntryTable != NULL) {
|
||||
return EFI_SUCCESS;
|
||||
} else {
|
||||
return EFI_OUT_OF_RESOURCES;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
plUnloadDebugSupportDriver (
|
||||
IN EFI_HANDLE ImageHandle
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
This is the callback that is written to the LoadedImage protocol instance
|
||||
on the image handle. It uninstalls all registered handlers and frees all entry
|
||||
stub memory.
|
||||
|
||||
This code executes in boot services context.
|
||||
|
||||
Arguments:
|
||||
ImageHandle - The image handle of the unload handler
|
||||
|
||||
Returns:
|
||||
|
||||
None
|
||||
|
||||
--*/
|
||||
// TODO: EFI_SUCCESS - add return value to function comment
|
||||
{
|
||||
EFI_EXCEPTION_TYPE ExceptionType;
|
||||
|
||||
for (ExceptionType = 0; ExceptionType < NUM_IDT_ENTRIES; ExceptionType++) {
|
||||
ManageIdtEntryTable (NULL, ExceptionType);
|
||||
}
|
||||
|
||||
gBS->FreePool (IdtEntryTable);
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
VOID
|
||||
InterruptDistrubutionHub (
|
||||
EFI_EXCEPTION_TYPE ExceptionType,
|
||||
EFI_SYSTEM_CONTEXT_IA32 *ContextRecord
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description: Common piece of code that invokes the registered handlers.
|
||||
|
||||
This code executes in exception context so no efi calls are allowed.
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns:
|
||||
|
||||
None
|
||||
|
||||
--*/
|
||||
// TODO: ExceptionType - add argument and description to function comment
|
||||
// TODO: ContextRecord - add argument and description to function comment
|
||||
{
|
||||
if (IdtEntryTable[ExceptionType].RegisteredCallback != NULL) {
|
||||
if (ExceptionType != SYSTEM_TIMER_VECTOR) {
|
||||
IdtEntryTable[ExceptionType].RegisteredCallback (ExceptionType, ContextRecord);
|
||||
} else {
|
||||
OrigVector = IdtEntryTable[ExceptionType].OrigVector;
|
||||
IdtEntryTable[ExceptionType].RegisteredCallback (ContextRecord);
|
||||
}
|
||||
}
|
||||
}
|
||||
312
EdkModulePkg/Universal/DebugSupport/Dxe/ia32/plDebugSupport.h
Normal file
312
EdkModulePkg/Universal/DebugSupport/Dxe/ia32/plDebugSupport.h
Normal file
@@ -0,0 +1,312 @@
|
||||
/*++
|
||||
|
||||
Copyright (c) 2006, 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:
|
||||
|
||||
plDebugSupport.h
|
||||
|
||||
Abstract:
|
||||
|
||||
IA32 specific debug support macros, typedefs and prototypes.
|
||||
|
||||
Revision History
|
||||
|
||||
--*/
|
||||
|
||||
#ifndef _PLDEBUG_SUPPORT_H
|
||||
#define _PLDEBUG_SUPPORT_H
|
||||
|
||||
#define NUM_IDT_ENTRIES 0x78
|
||||
#define SYSTEM_TIMER_VECTOR 0x68
|
||||
#define VECTOR_ENTRY_PAGES 1
|
||||
#define CopyDescriptor(Dest, Src) CopyMem ((Dest), (Src), sizeof (DESCRIPTOR))
|
||||
#define ZeroDescriptor(Dest) CopyDescriptor ((Dest), &NullDesc)
|
||||
#define ReadIdt(Vector, Dest) CopyDescriptor ((Dest), &((GetIdtr ())[(Vector)]))
|
||||
#define WriteIdt(Vector, Src) CopyDescriptor (&((GetIdtr ())[(Vector)]), (Src))
|
||||
#define CompareDescriptor(Desc1, Desc2) CompareMem ((Desc1), (Desc2), sizeof (DESCRIPTOR))
|
||||
#define EFI_ISA IsaIa32
|
||||
#define FF_FXSR (1 << 24)
|
||||
|
||||
typedef UINT64 DESCRIPTOR;
|
||||
|
||||
typedef struct {
|
||||
DESCRIPTOR OrigDesc;
|
||||
VOID (*OrigVector) (VOID);
|
||||
DESCRIPTOR NewDesc;
|
||||
VOID (*StubEntry) (VOID);
|
||||
VOID (*RegisteredCallback) ();
|
||||
} IDT_ENTRY;
|
||||
|
||||
extern EFI_SYSTEM_CONTEXT SystemContext;
|
||||
extern UINT8 InterruptEntryStub[];
|
||||
extern UINT32 StubSize;
|
||||
extern VOID (*OrigVector) (VOID);
|
||||
|
||||
VOID
|
||||
CommonIdtEntry (
|
||||
VOID
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
None
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
BOOLEAN
|
||||
FxStorSupport (
|
||||
VOID
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
None
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
DESCRIPTOR *
|
||||
GetIdtr (
|
||||
VOID
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
None
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
VOID
|
||||
Vect2Desc (
|
||||
DESCRIPTOR * DestDesc,
|
||||
VOID (*Vector) (VOID)
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
DestDesc - TODO: add argument description
|
||||
) - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
BOOLEAN
|
||||
WriteInterruptFlag (
|
||||
BOOLEAN NewState
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
NewState - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
EFI_STATUS
|
||||
plInitializeDebugSupportDriver (
|
||||
VOID
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
None
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
plUnloadDebugSupportDriver (
|
||||
IN EFI_HANDLE ImageHandle
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
ImageHandle - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
//
|
||||
// DebugSupport protocol member functions
|
||||
//
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
GetMaximumProcessorIndex (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
OUT UINTN *MaxProcessorIndex
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
This - TODO: add argument description
|
||||
MaxProcessorIndex - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
RegisterPeriodicCallback (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
IN UINTN ProcessorIndex,
|
||||
IN EFI_PERIODIC_CALLBACK PeriodicCallback
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
This - TODO: add argument description
|
||||
ProcessorIndex - TODO: add argument description
|
||||
PeriodicCallback - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
RegisterExceptionCallback (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
IN UINTN ProcessorIndex,
|
||||
IN EFI_EXCEPTION_CALLBACK NewCallback,
|
||||
IN EFI_EXCEPTION_TYPE ExceptionType
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
This - TODO: add argument description
|
||||
ProcessorIndex - TODO: add argument description
|
||||
NewCallback - TODO: add argument description
|
||||
ExceptionType - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
InvalidateInstructionCache (
|
||||
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
|
||||
IN UINTN ProcessorIndex,
|
||||
IN VOID *Start,
|
||||
IN UINT64 Length
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
TODO: Add function description
|
||||
|
||||
Arguments:
|
||||
|
||||
This - TODO: add argument description
|
||||
ProcessorIndex - TODO: add argument description
|
||||
Start - TODO: add argument description
|
||||
Length - TODO: add argument description
|
||||
|
||||
Returns:
|
||||
|
||||
TODO: add return values
|
||||
|
||||
--*/
|
||||
;
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user