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

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(root)/kernel/trunk/core/syscall.inc – Rev 4