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Rev 6 Rev 15
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;;                                                            ;;
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;;                                                            ;;
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;;                   SYSTEM CALL ENTRY                        ;;
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;;                   SYSTEM CALL ENTRY                        ;;
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;;                                                            ;;
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;;                                                            ;;
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uglobal
 - 
 
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  pushed_regs rd 1
 - 
 
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endg
 - 
 
9 
 
 6 
 
10 
align 32
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align 32
11 
i40:
 8 
i40:
- 
 
 9 
      push  ds es
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      pushad
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      pushad
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 - 
 
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      push  ds
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      mov   ax,word os_data
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      mov   ax,word os_data
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      mov   ds,ax
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      mov   ds,ax
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      mov   es,ax
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      mov   es,ax
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      mov   [pushed_regs],esp
 - 
 
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      add   dword [pushed_regs],4
 - 
 
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      cli
 - 
 
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 - 
 
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      mov    eax, [0x3000]
 - 
 
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      mov    edi, eax
 - 
 
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      shl    edi, 8
 - 
 
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      mov    [edi+0x80000+0xB0],eax  ; used i40 handler
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26 
 
 15 
 
27 
      ; for syscall trace function
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      ; for syscall trace function
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      call  save_registers
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      call  save_registers
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 - 
 
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      mov   esi,[pushed_regs]
 - 
 
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 18 
 
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      ; load first 3 registers
 - 
 
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      mov   eax,[esi+28]
 - 
 
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      mov   ebx,[esi+16]
 - 
 
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      mov   ecx,[esi+24]
 - 
 
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 - 
 
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      ; save current registers
 - 
 
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      ; stack may be modified by a system function to return some value to caller!
 - 
 
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      pushad
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 - 
 
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      ; load all registers from TSS of the application, in crossed order (why?)
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      ; load all registers in crossed order
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      mov   edi,[esi+28]
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      mov   edi,[esp+28] ; eax
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      mov   eax,[esi+16]
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      mov   eax,[esp+16] ; ebx
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      mov   ebx,[esi+24]
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      mov   ebx,[esp+24] ; ecx
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      mov   ecx,[esi+20]
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      mov   ecx,[esp+20] ; edx
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      mov   edx,[esi+4]
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      mov   edx,[esp+4]  ; esi
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      mov   esi,[esi+0]
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      mov   esi,[esp+0]  ; edi
48 
 
 26 
 
49 
      ; enable interupts  -  a task switch or an IRQ _CAN_ interrupt i40 handler
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      ; enable interupts  -  a task switch or an IRQ _CAN_ interrupt i40 handler
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      sti
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      sti
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      ; eax doesn't need to be saved, but...
 - 
 
52 
      push   eax
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      push  eax
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      and    edi,0xff
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      and   edi,0xff
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      call   dword [servetable+edi*4]
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      call  dword [servetable+edi*4]
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      pop    eax
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      pop   eax
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      cli
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      cli
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- 
 
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      ; return saved and probably even changed regs
 - 
 
59 
      popad
 - 
 
60 
 
 - 
 
61 
      ; modify 3 program's registers (in its TSS)
 - 
 
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      mov   [esi+28],eax
- 
 
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      mov   [esi+16],ebx
 - 
 
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      mov   [esi+24],ecx
 - 
 
65 
 
 - 
 
66 
      xor    eax, eax
 - 
 
67 
      mov    edi, [0x3000]          ; no syscall interrupt in use anymore
 - 
 
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      shl    edi, 8
 - 
 
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      mov    [edi+0x80000+0xB0],eax
 - 
 
70 
 
 - 
 
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      pop     eax
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      mov     ds,ax
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      mov     es,ax
 - 
 
74
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- 
 
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      popad
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      popad
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      pop   es ds
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      iretd
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      iretd
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 38 
 
78 
align 4
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align 4
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save_registers:
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save_registers:
80 
      mov   esi, [0x3010]
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      mov   esi, [0x3010]
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      mov   eax, [esi+0x4] ; load PID
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      mov   eax, [esi+0x4] ; load PID
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      mov   esi, [pushed_regs]
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      lea   esi, [esp+4]
83 
      inc   [save_syscall_count]
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      inc   [save_syscall_count]
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      mov   edi,[save_syscall_count]
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      mov   edi,[save_syscall_count]
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      and   edi,0xF
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      and   edi,0xF
86 
      shl   edi,6
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      shl   edi,6
87 
      add   edi,save_syscall_data+32
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      add   edi,save_syscall_data+32
88 
      mov   [edi-32],eax
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      mov   [edi-32],eax
89 
      mov   ecx,32 / 4
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      mov   ecx,32 / 4
90 
      cld
 51 
      cld
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      rep   movsd
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      rep   movsd
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      ret
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      ret
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uglobal
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uglobal
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  save_syscall_count  dd 0x0
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  save_syscall_count  dd 0x0
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endg
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endg
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label save_syscall_data dword at 0x5000
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label save_syscall_data dword at 0x5000
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 60 
 
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101 
iglobal
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iglobal
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  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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  ;; SYSTEM FUNCTIONS TABLE ;;
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  ;; SYSTEM FUNCTIONS TABLE ;;
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  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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106 
  align 4
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  align 4
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  servetable:
 68 
  servetable:
108 
 
 69 
 
109 
      dd sys_drawwindow          ; 0-DrawWindow
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      dd sys_drawwindow          ; 0-DrawWindow
110 
      dd syscall_setpixel        ; 1-SetPixel
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      dd syscall_setpixel        ; 1-SetPixel
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      dd sys_getkey              ; 2-GetKey
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      dd sys_getkey              ; 2-GetKey
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      dd sys_clock               ; 3-GetTime
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      dd sys_clock               ; 3-GetTime
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      dd syscall_writetext       ; 4-WriteText
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      dd syscall_writetext       ; 4-WriteText
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      dd delay_hs                ; 5-DelayHs
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      dd delay_hs                ; 5-DelayHs
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      dd syscall_openramdiskfile ; 6-OpenRamdiskFile
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      dd syscall_openramdiskfile ; 6-OpenRamdiskFile
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      dd syscall_putimage        ; 7-PutImage
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      dd syscall_putimage        ; 7-PutImage
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      dd sys_button              ; 8-DefineButton
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      dd sys_button              ; 8-DefineButton
118 
      dd sys_cpuusage            ; 9-GetProcessInfo
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      dd sys_cpuusage            ; 9-GetProcessInfo
119 
      dd sys_waitforevent        ; 10-WaitForEvent
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      dd sys_waitforevent        ; 10-WaitForEvent
120 
      dd sys_getevent            ; 11-CheckForEvent
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      dd sys_getevent            ; 11-CheckForEvent
121 
      dd sys_redrawstat          ; 12-BeginDraw and EndDraw
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      dd sys_redrawstat          ; 12-BeginDraw and EndDraw
122 
      dd syscall_drawrect        ; 13-DrawRect
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      dd syscall_drawrect        ; 13-DrawRect
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      dd syscall_getscreensize   ; 14-GetScreenSize
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      dd syscall_getscreensize   ; 14-GetScreenSize
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      dd sys_background          ; 15-bgr
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      dd sys_background          ; 15-bgr
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      dd sys_cachetodiskette     ; 16-FlushFloppyCache
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      dd sys_cachetodiskette     ; 16-FlushFloppyCache
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      dd sys_getbutton           ; 17-GetButton
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      dd sys_getbutton           ; 17-GetButton
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      dd syscall_system          ; 18-Shutdown,KillApp,WindowActivate
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      dd syscall_system          ; 18-Shutdown,KillApp,WindowActivate
128 
      dd syscall_startapp        ; 19-StartApp
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      dd syscall_startapp        ; 19-StartApp
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      dd sys_midi                ; 20-ResetMidi and OutputMidi
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      dd sys_midi                ; 20-ResetMidi and OutputMidi
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      dd sys_setup               ; 21-SetMidiBase,SetKeymap,SetShiftKeymap,.
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      dd sys_setup               ; 21-SetMidiBase,SetKeymap,SetShiftKeymap,.
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      dd sys_settime             ; 22-setting date,time,clock and alarm-clock
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      dd sys_settime             ; 22-setting date,time,clock and alarm-clock
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      dd sys_wait_event_timeout  ; 23-TimeOutWaitForEvent
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      dd sys_wait_event_timeout  ; 23-TimeOutWaitForEvent
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      dd syscall_cdaudio         ; 24-PlayCdTrack,StopCd and GetCdPlaylist
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      dd syscall_cdaudio         ; 24-PlayCdTrack,StopCd and GetCdPlaylist
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      dd sys_sb16                ; 25-SetSb16
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      dd sys_sb16                ; 25-SetSb16
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      dd sys_getsetup            ; 26-GetMidiBase,GetKeymap,GetShiftKeymap,.
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      dd sys_getsetup            ; 26-GetMidiBase,GetKeymap,GetShiftKeymap,.
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      dd sys_wss                 ; 27-SetWssMainVol and SetWssCdVol
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      dd sys_wss                 ; 27-SetWssMainVol and SetWssCdVol
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      dd sys_sb16II              ; 28-SetSb16
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      dd sys_sb16II              ; 28-SetSb16
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      dd sys_date                ; 29-GetDate
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      dd sys_date                ; 29-GetDate
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      dd syscall_readhd          ; 30-ReadHd
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      dd syscall_readhd          ; 30-ReadHd
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      dd syscall_starthdapp      ; 31-StartHdApp
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      dd syscall_starthdapp      ; 31-StartHdApp
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      dd syscall_delramdiskfile  ; 32-DelRamdiskFile
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      dd syscall_delramdiskfile  ; 32-DelRamdiskFile
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      dd syscall_writeramdiskfile; 33-WriteRamdiskFile
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      dd syscall_writeramdiskfile; 33-WriteRamdiskFile
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      dd read_floppy_file        ; 34-ReadFloppyDrive
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      dd read_floppy_file        ; 34-ReadFloppyDrive
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      dd syscall_getpixel        ; 35-GetPixel
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      dd syscall_getpixel        ; 35-GetPixel
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      dd syscall_readstring      ; 36-ReadString (not yet ready)
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      dd syscall_readstring      ; 36-ReadString (not yet ready)
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      dd readmousepos            ; 37-GetMousePosition_ScreenRelative,.
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      dd readmousepos            ; 37-GetMousePosition_ScreenRelative,.
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      dd syscall_drawline        ; 38-DrawLine
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      dd syscall_drawline        ; 38-DrawLine
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      dd sys_getbackground       ; 39-GetBackgroundSize,ReadBgrData,.
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      dd sys_getbackground       ; 39-GetBackgroundSize,ReadBgrData,.
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      dd set_app_param           ; 40-WantEvents
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      dd set_app_param           ; 40-WantEvents
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      dd syscall_getirqowner     ; 41-GetIrqOwner
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      dd syscall_getirqowner     ; 41-GetIrqOwner
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      dd get_irq_data            ; 42-ReadIrqData
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      dd get_irq_data            ; 42-ReadIrqData
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      dd sys_outport             ; 43-SendDeviceData
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      dd sys_outport             ; 43-SendDeviceData
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      dd sys_programirq          ; 44-ProgramIrqs
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      dd sys_programirq          ; 44-ProgramIrqs
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      dd reserve_free_irq        ; 45-ReserveIrq and FreeIrq
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      dd reserve_free_irq        ; 45-ReserveIrq and FreeIrq
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      dd syscall_reserveportarea ; 46-ReservePortArea and FreePortArea
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      dd syscall_reserveportarea ; 46-ReservePortArea and FreePortArea
156 
      dd display_number          ; 47-WriteNum
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      dd display_number          ; 47-WriteNum
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      dd display_settings        ; 48-SetRedrawType and SetButtonType
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      dd display_settings        ; 48-SetRedrawType and SetButtonType
158 
      dd syscall_appints         ; 49-AppInts
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      dd syscall_appints         ; 49-AppInts
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      dd random_shaped_window    ; 50-Window shape & scale
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      dd random_shaped_window    ; 50-Window shape & scale
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      dd syscall_threads         ; 51-Threads
 121 
      dd syscall_threads         ; 51-Threads
161 
      dd stack_driver_stat       ; 52-Stack driver status
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      dd stack_driver_stat       ; 52-Stack driver status
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      dd socket                  ; 53-Socket interface
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      dd socket                  ; 53-Socket interface
163 
      dd user_events             ; 54-User events
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      dd user_events             ; 54-User events
164 
      dd sound_interface         ; 55-Sound interface
 125 
      dd sound_interface         ; 55-Sound interface
165 
      dd write_to_hd             ; 56-Write a file to hd
 126 
      dd write_to_hd             ; 56-Write a file to hd
166 
      dd delete_from_hd          ; 57-Delete a file from hd
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      dd delete_from_hd          ; 57-Delete a file from hd
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      dd file_system             ; 58-Common file system interface
 128 
      dd file_system             ; 58-Common file system interface
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      dd sys_trace               ; 59-System call trace
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      dd sys_trace               ; 59-System call trace
169 
      dd new_sys_ipc             ; 60-Inter Process Communication
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      dd new_sys_ipc             ; 60-Inter Process Communication
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      dd sys_gs                  ; 61-Direct graphics access
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      dd sys_gs                  ; 61-Direct graphics access
171 
      dd sys_pci                 ; 62-PCI functions
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      dd sys_pci                 ; 62-PCI functions
172 
      dd sys_msg_board           ; 63-System message board
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      dd sys_msg_board           ; 63-System message board
173 
      dd sys_resize_app_memory   ; 64-Resize application memory usage
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      dd sys_resize_app_memory   ; 64-Resize application memory usage
174 
      dd undefined_syscall       ; 65-UTF
 135 
      dd undefined_syscall       ; 65-UTF
175 
      dd sys_process_def         ; 66-Process definitions - keyboard
 136 
      dd sys_process_def         ; 66-Process definitions - keyboard
176 
      dd sys_window_move         ; 67-Window move or resize
 137 
      dd sys_window_move         ; 67-Window move or resize
177 
      dd sys_internal_services   ; 68-Some internal services
 138 
      dd sys_internal_services   ; 68-Some internal services
178 
 
 139 
 
179 
  times 255 - ( ($-servetable) /4 )  dd undefined_syscall
 140 
  times 255 - ( ($-servetable) /4 )  dd undefined_syscall
180 
 
 141 
 
181 
      dd sys_end                 ; -1-end application
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      dd sys_end                 ; -1-end application
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endg
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endg