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• This comparison shows the changes necessary to convert path

  → /kernel/trunk/core/syscall.inc @ 2

  → /kernel/trunk/core/syscall.inc @ 3

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Regard whitespace Rev 2 → Rev 3

/kernel/trunk/core/syscall.inc
3,9 → 3,19
;; SYSTEM CALL ENTRY ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
uglobal
task_tss rd 1
endg
align 32
i40:
pushad
push ds
mov ax,word os_data
mov ds,ax
mov es,ax
mov [task_tss],esp
add dword [task_tss],4
cli
mov edi,[0x3000]
15,15 → 25,15
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
;save GDT TSS entry
mov edx,[edi+tss0_l]
mov [reg1+eax*4],edx
mov edx,[edi+tss0_l+4]
mov [reg2+eax*4],edx
; mov edx,[edi+tss0_l]
; mov [reg1+eax*4],edx
; mov edx,[edi+tss0_l+4]
; mov [reg2+eax*4],edx
;and then write there i40's descriptor
mov edx,[tss0sys_l+edi]
mov [edi+tss0_l],edx
mov edx,[tss0sys_l+edi+4]
mov [edi+tss0_l+4],edx
; mov edx,[tss0sys_l+edi]
; mov [edi+tss0_l],edx
; mov edx,[tss0sys_l+edi+4]
; mov [edi+tss0_l+4],edx
shl edi,5
32,14 → 42,16
; for syscall trace function
call save_registers
mov esi, [0x3000]
imul esi, tss_step
add esi, tss_data
; mov esi, [0x3000]
; imul esi, tss_step
; add esi, tss_data
mov esi,[task_tss]
; sub esi,0x28
; esi holds address of TSS of interupted program
; load first 3 registers
mov eax,[esi+l.eax-tss_sceleton]
mov ebx,[esi+l.ebx-tss_sceleton]
mov ecx,[esi+l.ecx-tss_sceleton]
mov eax,[esi+28];+l.eax-tss_sceleton]
mov ebx,[esi+16];l.ebx-tss_sceleton]
mov ecx,[esi+24];l.ecx-tss_sceleton]
; save current registers
; stack may be modified by a system function to return some value to caller!
46,12 → 58,12
pushad
; load all registers from TSS of the application, in crossed order (why?)
mov edi,[esi+l.eax-tss_sceleton]
mov eax,[esi+l.ebx-tss_sceleton]
mov ebx,[esi+l.ecx-tss_sceleton]
mov ecx,[esi+l.edx-tss_sceleton]
mov edx,[esi+l.esi-tss_sceleton]
mov esi,[esi+l.edi-tss_sceleton]
mov edi,[esi+28];l.eax-tss_sceleton]
mov eax,[esi+16];l.ebx-tss_sceleton]
mov ebx,[esi+24];l.ecx-tss_sceleton]
mov ecx,[esi+20];l.edx-tss_sceleton]
mov edx,[esi+4];l.esi-tss_sceleton]
mov esi,[esi+0];l.edi-tss_sceleton]
; enable interupts - a task switch or an IRQ _CAN_ interrupt i40 handler
sti
72,22 → 84,22
; </Ivan 05.03.2005>
; modify 3 program's registers (in its TSS)
mov [esi+l.eax-tss_sceleton], eax
mov [esi+l.ebx-tss_sceleton], ebx
mov [esi+l.ecx-tss_sceleton], ecx
mov [esi+28],eax;[esi+l.eax-tss_sceleton], eax
mov [esi+16],ebx;[esi+l.ebx-tss_sceleton], ebx
mov [esi+24],ecx;[esi+l.ecx-tss_sceleton], ecx
; calculate app's TSS address
mov ebx, [0x3000]
shl ebx, 3
add ebx, tss0_l
; mov ebx, [0x3000]
; shl ebx, 3
; add ebx, tss0_l
mov ecx, [0x3000]
; mov ecx, [0x3000]
; restore saved TSS descriptor
mov eax, [reg1+ecx*4]
mov [ebx], eax
mov eax, [reg2+ecx*4]
mov [ebx+4], eax
; mov eax, [reg1+ecx*4]
; mov [ebx], eax
; mov eax, [reg2+ecx*4]
; mov [ebx+4], eax
xor eax, eax
mov edi, [0x3000] ; no syscall interrupt in use anymore
95,15 → 107,21
mov [edi+0x80000+0xB0],eax
; clear busy flag in TSS of this handler
mov edi, [0x3000]
shl edi, 3
mov [edi+tss0sys_l +5], word 01010000b *256 +11101001b
; mov edi, [0x3000]
; shl edi, 3
; mov [edi+tss0sys_l +5], word 01010000b *256 +11101001b
add edi,tss0
mov [0xB004], di
; add edi,tss0
; mov [0xB004], di
jmp pword [0xB000]
; jmp pword [0xB000]
pop eax
mov ds,ax
mov es,ax
popad
iretd
jmp i40
label reg1 dword at 0x6000