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Simplify and correct KiDebugService

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svn path=/trunk/; revision=14802
This commit is contained in:
Alex Ionescu 2005-04-25 16:17:35 +00:00
parent 3ebd40dd0f
commit 6f666f0ad4
1 changed files with 32 additions and 45 deletions
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73
reactos/ntoskrnl/ke/i386/syscall.S
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@ -401,20 +401,40 @@ _KiServiceExit2:
.intel_syntax noprefix
_KiDebugService:
/* Save the user context */
/* Create the Trap Frame */
push 0
push ebp
push eax
push ecx
push edx
push ebx
push esi
push edi
push fs
/* Switch to correct FS */
mov bx, PCR_SELECTOR
mov fs, bx
/* Save Exception List */
push fs:[KPCR_EXCEPTION_LIST]
/* Use Old Previous Mode */
mov ebx, fs:[KPCR_CURRENT_THREAD]
push [ebx+KTHREAD_PREVIOUS_MODE]
/* Continue building the Trap Frame */
push eax
push ecx
push edx
push ds
push es
push fs
push gs
sub esp, 112 /* FloatSave */
/* Switch Segments to Kernel */
mov bx, KERNEL_DS
mov ds, bx
mov es, bx
/* Save Debug Registers */
mov ebx, eax
mov eax, dr7
push eax
@ -430,15 +450,8 @@ _KiDebugService:
push eax
mov eax, ebx
push 0 /* ContextFlags */
/* Set ES to kernel segment */
mov bx, KERNEL_DS
mov es, bx
/* FIXME: check to see if SS is valid/inrange */
mov ds, bx /* DS is now also kernel segment */
/* Skip useless debug data */
sub esp, 0x18
/* Call debug service dispatcher */
push edx
@ -446,31 +459,5 @@ _KiDebugService:
push eax
call _KdpServiceDispatcher@12
/* Restore the user context */
add esp, 4 /* UserContext */
pop eax
mov dr0, eax
pop eax
mov dr1, eax
pop eax
mov dr2, eax
pop eax
mov dr3, eax
pop eax
mov dr6, eax
pop eax
mov dr7, eax
add esp, 112 /* FloatingSave */
pop gs
pop fs
pop es
pop ds
pop edi
pop esi
pop ebx
pop edx
pop ecx
add esp, 4 /* Eax Not restored */
pop ebp
iretd
/* Exit through common routine */
jmp _KiServiceExit2