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