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Fixed error code and optimized function

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git-svn-id: svn://kolibrios.org@7325 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pavelyakov 2018-08-27 10:26:47 +00:00
parent 8100a4f52f
commit 598bb537e9
1 changed files with 46 additions and 53 deletions
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91
kernel/trunk/core/syscall.inc
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@ -187,74 +187,67 @@ iglobal
endg
; Author Pavel Iakovlev
; Return EAX = 0 security kernel, error set function
; Return Else EAX > 0 success set function
align 32
callSet0x40:
shl eax, 2
push dword [memNewFunctionTable + eax]
pop dword [tempPointerAlloc]
mov eax, dword [memOldFunctionTable + eax]
call dword [tempPointerAlloc]
ret
align 4
setInt0x40:
; !!! kernel security !!!
and ebx, 0FFh
mov eax, dword [servetable2 + ebx * 4]
; cmp eax, undefined_syscall
; jne errorSet0x40
; -----------------------
shl ebx, 2
mov eax, dword [servetable2 + ebx]
pushad
add edx, 16
stdcall kernel_alloc, edx
push eax
pop dword[tempPointerAlloc]
sub esi, edx
add esi, 16
stdcall kernel_alloc, esi
mov dword [tempPointerAlloc], eax
popad
push ebx
push dword[tempPointerAlloc]
pop eax
mov eax, dword [tempPointerAlloc]
mov ebx, eax
add eax, edx
; push 0
; pop dword[hashDataFunction1]
; push 1
; pop dword[hashDataFunction2]
add eax, esi
sub eax, edx
push edx
push ecx
loopCopyMemory:
xor edx, edx
mov dl, byte[ecx]
mov byte[ebx], dl
; hash security function
; add dword[hashDataFunction1], edx
; mov edx, dword[hashDataFunction1]
; add dword[hashDataFunction2], edx
; -----------------------------
mov cl, byte[edx]
mov byte[ebx], cl
inc ebx
inc ecx
inc edx
cmp ebx, eax
jne loopCopyMemory
pop ecx
pop edx
pop ebx
; check hash security data
; cmp edi, dword[hashDataFunction1]
; jne errorSet0x40
; cmp esi, dword[hashDataFunction2]
; jne errorSet0x40
; -------------------------------
mov eax, dword[tempPointerAlloc]
mov dword [servetable2 + ebx * 4], eax
jmp successSet0x40
errorSet0x40:
xor eax, eax
successSet0x40:
mov eax, dword [tempPointerAlloc]
mov esi, dword [servetable2 + ebx]
cmp esi, undefined_syscall
jne .step1
sub ecx, edx
add eax, ecx
mov dword [servetable2 + ebx], eax
ret
.step1:
mov dword [memOldFunctionTable + ebx], esi
sub ecx, edx
add eax, ecx
mov dword [memNewFunctionTable + ebx], eax
mov dword [servetable2 + ebx], callSet0x40
ret
tempPointerAlloc dd ?
;hashDataFunction1 dd ?
;hashDataFunction2 dd ?
align 4
tempPointerAlloc dd 0
memOldFunctionTable: times 255 dd 0
memNewFunctionTable: times 255 dd 0
;-------------------