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fixed one bug that old rsp was calculate incorrectly.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9745 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff 2010-01-14 05:49:16 +00:00
parent b1a803d153
commit c7a5da72f0
2 changed files with 32 additions and 32 deletions
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54
MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.S
View File

@ -1,7 +1,7 @@
///**@file
// Low leve x64 specific debug support functions.
//
// Copyright (c) 2006 - 2009, Intel Corporation
// Copyright (c) 2006 - 2010, Intel Corporation
// Portions copyright (c) 2008-2009 Apple Inc. All rights reserved.
// All rights reserved. This program and the accompanying materials
// are licensed and made available under the terms and conditions of the BSD License
@ -11,15 +11,15 @@
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
//
//**/
//**/
ASM_GLOBAL ASM_PFX(OrigVector)
ASM_GLOBAL ASM_PFX(InterruptEntryStub)
ASM_GLOBAL ASM_PFX(StubSize)
ASM_GLOBAL ASM_PFX(CommonIdtEntry)
ASM_GLOBAL ASM_PFX(FxStorSupport)
.data
.data
ASM_PFX(StubSize): .long ASM_PFX(InterruptEntryStubEnd) - ASM_PFX(InterruptEntryStub)
ASM_PFX(AppRsp): .long 0x11111111 # ?
@ -79,7 +79,7 @@ ASM_PFX(ExceptionNumber): .long 0x77777777 # first entry will be the vecto
.long 0x77777777 # ?
DebugStackBegin : .ascii "<<<< DbgStkBegin" # initial debug ESP == DebugStackBegin, set in stub
.text
@ -92,7 +92,7 @@ DebugStackBegin : .ascii "<<<< DbgStkBegin" # initial debug ESP == DebugSta
// Abstract: Returns TRUE if FxStor instructions are supported
//
ASM_GLOBAL ASM_PFX(FxStorSupport)
ASM_PFX(FxStorSupport):
ASM_PFX(FxStorSupport):
//
// cpuid corrupts rbx which must be preserved per the C calling convention
//
@ -138,7 +138,7 @@ ASM_PFX(InterruptEntryStub):
pushq $0 # push vector number - will be modified before installed
jmp ASM_PFX(CommonIdtEntry)
ASM_GLOBAL ASM_PFX(InterruptEntryStubEnd)
ASM_PFX(InterruptEntryStubEnd):
@ -249,7 +249,7 @@ ExtraPushOne:
// If there's some extra data, save it also, and modify the saved AppRsp to effectively
// pop this value off the application's stack.
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq (%rax), %rbx
movq %rbx, ASM_PFX(ExceptData)(%rip)
addq $8, %rax
@ -262,11 +262,11 @@ ExtraPushDone:
// debug RSP, and replace it with the application's last stack entry...
movq 24(%rsp), %rax
movq %rax, ASM_PFX(DebugRsp)(%rip)
movq ASM_PFX(AppRsp)(%rip), %rax
addq $40, %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq 24(%rax), %rax
# application stack has ss, rsp, rflags, cs, & rip, so
# last actual application stack entry is 40 bytes
# into the application stack.
# last actual application stack entry is saved at offset
# 24 bytes from stack top.
movq %rax, 24(%rsp)
// continue building context record
@ -288,7 +288,7 @@ ExtraPushDone:
pushq %rax
// UINT64 Rip;
# Rip from application is on top of application stack
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
pushq (%rax)
// UINT64 Gdtr[2], Idtr[2];
push $0
@ -307,7 +307,7 @@ ExtraPushDone:
// UINT64 RFlags;
// Rflags from application is two entries back in application stack
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
pushq 16(%rax)
// UINT64 Cr0, Cr1, Cr2, Cr3, Cr4, Cr8;
// insure FXSAVE/FXRSTOR is enabled in CR4...
@ -353,7 +353,7 @@ ExtraPushDone:
# IMPORTANT!! The debug stack has been carefully constructed to
# insure that rsp and rdi are 16 byte aligned when we get here.
# They MUST be. If they are not, a GP fault will occur.
# FXSTOR_RDI
fxsave (%rdi)
@ -364,7 +364,7 @@ ExtraPushDone:
// call to C code which will in turn call registered handler
// pass in the vector number
movq %rsp, %rdx
movq ASM_PFX(ExceptionNumber)(%rip), %rcx
movq ASM_PFX(ExceptionNumber)(%rip), %rcx
subq $40, %rsp
call ASM_PFX(InterruptDistrubutionHub)
addq $40, %rsp
@ -374,7 +374,7 @@ ExtraPushDone:
// FX_SAVE_STATE_X64 FxSaveState;
movq %rsp, %rsi
# FXRSTOR_RSI
fxrstor (%rsi)
@ -408,7 +408,7 @@ ExtraPushDone:
popq %rax
movq %rax, %cr8
// UINT64 RFlags;
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
popq 16(%rax)
// UINT64 Ldtr, Tr;
// UINT64 Gdtr[2], Idtr[2];
@ -431,7 +431,7 @@ ExtraPushDone:
mov %rax, %es
popq %rax
mov %rax, %ds
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
popq 8(%rax)
popq %rax
mov %rax, %ss
@ -444,12 +444,12 @@ ExtraPushDone:
## determine if we need to relocate the application stack.
movq 24(%rsp), %rbx # move the potentially modified AppRsp into rbx
movq ASM_PFX(AppRsp)(%rip), %rax
addq $40, %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq 24(%rax), %rax
cmpq %rax, %rbx
je NoAppStackMove
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq (%rax), %rcx # RIP
movq %rcx, (%rbx)
@ -479,7 +479,7 @@ Chain:
// Restore rflags so when we chain, the flags will be exactly as if we were never here.
// We gin up the stack to do an iretq so we can get ALL the flags.
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq 40(%rax), %rbx
pushq %rbx
mov %ss, %rax
@ -487,13 +487,13 @@ Chain:
movq %rsp, %rax
addq $16, %rax
pushq %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq ASM_PFX(AppRsp)(%rip), %rax
movq 16(%rax), %rbx
andq $0xfffffffffffffcff, %rbx # special handling for IF and TF
pushq %rbx
mov %cs, %rax
pushq %rax
movq PhonyIretq(%rip), %rax
movq PhonyIretq(%rip), %rax
pushq %rax
iretq
PhonyIretq:
@ -518,7 +518,7 @@ PhonyIretq:
popq %r15
// Switch back to application stack
movq ASM_PFX(AppRsp)(%rip), %rsp
movq ASM_PFX(AppRsp)(%rip), %rsp
// Jump to original handler
jmp ASM_PFX(OrigVector)
NoChain:
@ -542,7 +542,7 @@ NoChain:
popq %r15
// Switch back to application stack
movq ASM_PFX(AppRsp)(%rip), %rsp
movq ASM_PFX(AppRsp)(%rip), %rsp
// We're outa here...
iret

10
MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm
View File

@ -1,7 +1,7 @@
;/** @file
; Low level x64 routines used by the debug support driver.
;
; Copyright (c) 2007 - 2008, Intel Corporation.
; Copyright (c) 2007 - 2010, 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
@ -296,10 +296,10 @@ ExtraPushDone:
mov rax, [rsp + 24]
mov DebugRsp, rax
mov rax, AppRsp
add rax, 40
mov rax, QWORD PTR [rax + 24]
; application stack has ss, rsp, rflags, cs, & rip, so
; last actual application stack entry is
; 40 bytes into the application stack.
; last actual application stack entry is saved at offset
; 24 bytes from stack top.
mov [rsp + 24], rax
;; continue building context record
@ -482,7 +482,7 @@ ExtraPushDone:
mov rbx, [rsp + 24] ; move the potentially modified AppRsp into rbx
mov rax, AppRsp
add rax, 40
mov rax, QWORD PTR [rax + 24]
cmp rbx, rax
je NoAppStackMove