WebSVN – Kolibri OS – Blame – /kernel/trunk/core/syscall.inc

Rev	Author	Line No.	Line
1	ha	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; SYSTEM CALL ENTRY ;;
		4	;; ;;
		5	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
3	halyavin	6	uglobal
		7	task_tss rd 1
		8	endg
1	ha	9	align 32
		10	i40:
3	halyavin	11	pushad
		12
		13	push ds
		14	mov ax,word os_data
		15	mov ds,ax
		16	mov es,ax
		17	mov [task_tss],esp
		18	add dword [task_tss],4
1	ha	19	cli
		20
		21	mov edi,[0x3000]
		22	mov eax,edi
		23	shl edi, 3
		24	;clear busy flag in application's TSS
		25	mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
		26
		27	;save GDT TSS entry
3	halyavin	28	; mov edx,[edi+tss0_l]
		29	; mov [reg1+eax*4],edx
		30	; mov edx,[edi+tss0_l+4]
		31	; mov [reg2+eax*4],edx
1	ha	32	;and then write there i40's descriptor
3	halyavin	33	; mov edx,[tss0sys_l+edi]
		34	; mov [edi+tss0_l],edx
		35	; mov edx,[tss0sys_l+edi+4]
		36	; mov [edi+tss0_l+4],edx
1	ha	37
		38
		39	shl edi,5
		40	mov [edi+0x80000+0xB0],eax ; used i40 handler
		41
		42	; for syscall trace function
		43	call save_registers
		44
3	halyavin	45	; mov esi, [0x3000]
		46	; imul esi, tss_step
		47	; add esi, tss_data
		48	mov esi,[task_tss]
		49	; sub esi,0x28
1	ha	50	; esi holds address of TSS of interupted program
		51	; load first 3 registers
3	halyavin	52	mov eax,[esi+28];+l.eax-tss_sceleton]
		53	mov ebx,[esi+16];l.ebx-tss_sceleton]
		54	mov ecx,[esi+24];l.ecx-tss_sceleton]
1	ha	55
		56	; save current registers
		57	; stack may be modified by a system function to return some value to caller!
		58	pushad
		59
		60	; load all registers from TSS of the application, in crossed order (why?)
3	halyavin	61	mov edi,[esi+28];l.eax-tss_sceleton]
		62	mov eax,[esi+16];l.ebx-tss_sceleton]
		63	mov ebx,[esi+24];l.ecx-tss_sceleton]
		64	mov ecx,[esi+20];l.edx-tss_sceleton]
		65	mov edx,[esi+4];l.esi-tss_sceleton]
		66	mov esi,[esi+0];l.edi-tss_sceleton]
1	ha	67
		68	; enable interupts - a task switch or an IRQ _CAN_ interrupt i40 handler
		69	sti
		70	; eax doesn't need to be saved, but...
		71	push eax
		72	and edi,0xff
		73	call dword [servetable+edi*4]
		74	pop eax
		75	cli
		76
		77	; return saved and probably even changed regs
		78	popad
		79
		80	; esi already loaded - look above "pusha"
		81	;mov esi,[0x3000]
		82	;imul esi,tss_step
		83	;add esi,tss_data
		84	;
		85
		86	; modify 3 program's registers (in its TSS)
3	halyavin	87	mov [esi+28],eax;[esi+l.eax-tss_sceleton], eax
		88	mov [esi+16],ebx;[esi+l.ebx-tss_sceleton], ebx
		89	mov [esi+24],ecx;[esi+l.ecx-tss_sceleton], ecx
1	ha	90
		91	; calculate app's TSS address
3	halyavin	92	; mov ebx, [0x3000]
		93	; shl ebx, 3
		94	; add ebx, tss0_l
1	ha	95
3	halyavin	96	; mov ecx, [0x3000]
1	ha	97
		98	; restore saved TSS descriptor
3	halyavin	99	; mov eax, [reg1+ecx*4]
		100	; mov [ebx], eax
		101	; mov eax, [reg2+ecx*4]
		102	; mov [ebx+4], eax
1	ha	103
		104	xor eax, eax
		105	mov edi, [0x3000] ; no syscall interrupt in use anymore
		106	shl edi, 8
		107	mov [edi+0x80000+0xB0],eax
		108
		109	; clear busy flag in TSS of this handler
3	halyavin	110	; mov edi, [0x3000]
		111	; shl edi, 3
		112	; mov [edi+tss0sys_l +5], word 01010000b *256 +11101001b
1	ha	113
3	halyavin	114	; add edi,tss0
		115	; mov [0xB004], di
1	ha	116
3	halyavin	117	; jmp pword [0xB000]
		118	pop eax
		119	mov ds,ax
		120	mov es,ax
		121
		122	popad
		123	iretd
1	ha	124
		125	jmp i40
		126
		127	label reg1 dword at 0x6000
		128	label reg2 dword at 0x6400
		129	label usedi40 byte at 0x6800
		130
		131	uglobal
		132	schd dd 0x0
		133	endg
		134
		135	align 4
		136	save_registers:
		137
		138	mov esi,[0x3000]
		139	imul esi,tss_step
		140	add esi,tss_data
		141
		142	mov eax,[esi+l.eax-tss_sceleton]
		143	mov ebx,[esi+l.ebx-tss_sceleton]
		144	mov ecx,[esi+l.ecx-tss_sceleton]
		145	mov edx,[esi+l.edx-tss_sceleton]
		146	mov edi,[esi+l.edi-tss_sceleton]
		147	mov ebp,[esi+l.ebp-tss_sceleton]
		148
		149	mov esi,[esi+l.esi-tss_sceleton]
		150
		151	push eax ecx esi edi
		152	mov esi,[0x3010]
		153	mov eax,[esi+0x4]
		154	mov esi,esp
		155	inc [save_syscall_count]
		156	mov edi,[save_syscall_count]
		157	and edi,0xF
		158	shl edi,6
		159	add edi,save_syscall_data+32
		160	mov [edi-32],eax
		161	mov ecx,32 / 4
		162	cld
		163	rep movsd
		164	pop edi esi ecx eax
		165	ret
		166
		167	uglobal
		168	save_syscall_count dd 0x0
		169	endg
		170
		171	label save_syscall_data dword at 0x5000
		172
		173
		174	iglobal
		175	;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		176	;; SYSTEM FUNCTIONS TABLE ;;
		177	;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		178
		179	align 4
		180	servetable:
		181
		182	dd sys_drawwindow ; 0-DrawWindow
		183	dd syscall_setpixel ; 1-SetPixel
		184	dd sys_getkey ; 2-GetKey
		185	dd sys_clock ; 3-GetTime
		186	dd syscall_writetext ; 4-WriteText
		187	dd delay_hs ; 5-DelayHs
		188	dd syscall_openramdiskfile ; 6-OpenRamdiskFile
		189	dd syscall_putimage ; 7-PutImage
		190	dd sys_button ; 8-DefineButton
		191	dd sys_cpuusage ; 9-GetProcessInfo
		192	dd sys_waitforevent ; 10-WaitForEvent
		193	dd sys_getevent ; 11-CheckForEvent
		194	dd sys_redrawstat ; 12-BeginDraw and EndDraw
		195	dd syscall_drawrect ; 13-DrawRect
		196	dd syscall_getscreensize ; 14-GetScreenSize
		197	dd sys_background ; 15-bgr
		198	dd sys_cachetodiskette ; 16-FlushFloppyCache
		199	dd sys_getbutton ; 17-GetButton
		200	dd syscall_system ; 18-Shutdown,KillApp,WindowActivate
		201	dd syscall_startapp ; 19-StartApp
		202	dd sys_midi ; 20-ResetMidi and OutputMidi
		203	dd sys_setup ; 21-SetMidiBase,SetKeymap,SetShiftKeymap,.
		204	dd sys_settime ; 22-setting date,time,clock and alarm-clock
		205	dd sys_wait_event_timeout ; 23-TimeOutWaitForEvent
		206	dd syscall_cdaudio ; 24-PlayCdTrack,StopCd and GetCdPlaylist
		207	dd sys_sb16 ; 25-SetSb16
		208	dd sys_getsetup ; 26-GetMidiBase,GetKeymap,GetShiftKeymap,.
		209	dd sys_wss ; 27-SetWssMainVol and SetWssCdVol
		210	dd sys_sb16II ; 28-SetSb16
		211	dd sys_date ; 29-GetDate
		212	dd syscall_readhd ; 30-ReadHd
		213	dd syscall_starthdapp ; 31-StartHdApp
		214	dd syscall_delramdiskfile ; 32-DelRamdiskFile
		215	dd syscall_writeramdiskfile; 33-WriteRamdiskFile
		216	dd read_floppy_file ; 34-ReadFloppyDrive
		217	dd syscall_getpixel ; 35-GetPixel
		218	dd syscall_readstring ; 36-ReadString (not yet ready)
		219	dd readmousepos ; 37-GetMousePosition_ScreenRelative,.
		220	dd syscall_drawline ; 38-DrawLine
		221	dd sys_getbackground ; 39-GetBackgroundSize,ReadBgrData,.
		222	dd set_app_param ; 40-WantEvents
		223	dd syscall_getirqowner ; 41-GetIrqOwner
		224	dd get_irq_data ; 42-ReadIrqData
		225	dd sys_outport ; 43-SendDeviceData
		226	dd sys_programirq ; 44-ProgramIrqs
		227	dd reserve_free_irq ; 45-ReserveIrq and FreeIrq
		228	dd syscall_reserveportarea ; 46-ReservePortArea and FreePortArea
		229	dd display_number ; 47-WriteNum
		230	dd display_settings ; 48-SetRedrawType and SetButtonType
		231	dd syscall_appints ; 49-AppInts
		232	dd random_shaped_window ; 50-Window shape & scale
		233	dd syscall_threads ; 51-Threads
		234	dd stack_driver_stat ; 52-Stack driver status
		235	dd socket ; 53-Socket interface
		236	dd user_events ; 54-User events
		237	dd sound_interface ; 55-Sound interface
		238	dd write_to_hd ; 56-Write a file to hd
		239	dd delete_from_hd ; 57-Delete a file from hd
		240	dd file_system ; 58-Common file system interface
		241	dd sys_trace ; 59-System call trace
		242	dd new_sys_ipc ; 60-Inter Process Communication
		243	dd sys_gs ; 61-Direct graphics access
		244	dd sys_pci ; 62-PCI functions
		245	dd sys_msg_board ; 63-System message board
		246	dd sys_resize_app_memory ; 64-Resize application memory usage
		247	dd undefined_syscall ; 65-UTF
		248	dd sys_process_def ; 66-Process definitions - keyboard
		249	dd sys_window_move ; 67-Window move or resize
		250	dd sys_internal_services ; 68-Some internal services
		251
		252	times 255 - ( ($-servetable) /4 ) dd undefined_syscall
		253
		254	dd sys_end ; -1-end application
		255	endg
		256

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(root)/kernel/trunk/core/syscall.inc @ 380 – Rev 3