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• This comparison shows the changes necessary to convert path

  → /kernel/trunk/core/syscall.inc @ 5

  → /kernel/trunk/core/syscall.inc @ 6

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Regard whitespace Rev 5 → Rev 6

/kernel/trunk/core/syscall.inc
4,8 → 4,9
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
uglobal
task_tss rd 1
pushed_regs rd 1
endg
align 32
i40:
pushad
14,33 → 15,24
mov ax,word os_data
mov ds,ax
mov es,ax
mov [task_tss],esp
add dword [task_tss],4
mov [pushed_regs],esp
add dword [pushed_regs],4
cli
mov edi,[0x3000]
mov eax,edi
shl edi, 3
;clear busy flag in application's TSS
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
shl edi,5
mov eax, [0x3000]
mov edi, eax
shl edi, 8
mov [edi+0x80000+0xB0],eax ; used i40 handler
; for syscall trace function
call save_registers
; 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
mov esi,[pushed_regs]
; load first 3 registers
mov eax,[esi+28];+l.eax-tss_sceleton]
mov ebx,[esi+16];l.ebx-tss_sceleton]
mov ecx,[esi+24];l.ecx-tss_sceleton]
mov eax,[esi+28]
mov ebx,[esi+16]
mov ecx,[esi+24]
; save current registers
; stack may be modified by a system function to return some value to caller!
47,12 → 39,12
pushad
; load all registers from TSS of the application, in crossed order (why?)
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]
mov edi,[esi+28]
mov eax,[esi+16]
mov ebx,[esi+24]
mov ecx,[esi+20]
mov edx,[esi+4]
mov esi,[esi+0]
; enable interupts - a task switch or an IRQ _CAN_ interrupt i40 handler
sti
66,16 → 58,10
; return saved and probably even changed regs
popad
; <Ivan 05.03.2005> esi already loaded - look above "pusha"
;mov esi,[0x3000]
;imul esi,tss_step
;add esi,tss_data
; </Ivan 05.03.2005>
; modify 3 program's registers (in its TSS)
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
mov [esi+28],eax
mov [esi+16],ebx
mov [esi+24],ecx
xor eax, eax
mov edi, [0x3000] ; no syscall interrupt in use anymore
89,36 → 75,11
popad
iretd
jmp i40
label reg1 dword at 0x6000
label reg2 dword at 0x6400
label usedi40 byte at 0x6800
uglobal
schd dd 0x0
endg
align 4
save_registers:
mov esi,[0x3000]
imul esi,tss_step
add esi,tss_data
mov eax,[esi+l.eax-tss_sceleton]
mov ebx,[esi+l.ebx-tss_sceleton]
mov ecx,[esi+l.ecx-tss_sceleton]
mov edx,[esi+l.edx-tss_sceleton]
mov edi,[esi+l.edi-tss_sceleton]
mov ebp,[esi+l.ebp-tss_sceleton]
mov esi,[esi+l.esi-tss_sceleton]
push eax ecx esi edi
mov esi,[0x3010]
mov eax,[esi+0x4]
mov esi,esp
mov eax, [esi+0x4] ; load PID
mov esi, [pushed_regs]
inc [save_syscall_count]
mov edi,[save_syscall_count]
and edi,0xF
128,7 → 89,6
mov ecx,32 / 4
cld
rep movsd
pop edi esi ecx eax
ret
uglobal