;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; MenuetOS process management, protected ring3 ;;
;; ;;
;; Distributed under GPL. See file COPYING for details. ;;
;; Copyright 2003 Ville Turjanmaa ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 32
; GDT TABLE
gdts:
dw gdte-$-1
dd gdts
dw 0
int_code_l:
os_code_l:
dw 0xffff
dw 0x0000
db 0x00
dw 11011111b *256 +10011010b
db 0x00
int_data_l:
os_data_l:
dw 0xffff
dw 0x0000
db 0x00
dw 11011111b *256 +10010010b
db 0x00
graph_data_l:
dw 0x3ff
dw 0x0000
db 0x00
dw 11010000b *256 +11110010b
db 0x00
tss0_l:
times (max_processes+10) dd 0,0
tss0i_l:
times 0x41 dq 0 ;(256+10) dd 0,0
app_code_l:
times (max_processes+10) dd 0,0
app_data_l:
times (max_processes+10) dd 0,0
tss0sys_l:
times (max_processes+10) dd 0,0
gdte:
; <IP 05.02.2005>
idtreg:
dw 8*0x41-1
dd idts+8
label idts at 0xB100-8
;idte = idts + 8 + 0x60
; </IP> ; old code below:
;align 32
;idts:
; dw idte-$-1
; dd idts+8
; dw 0
; times 0x62 dd 0,0
;idte:
build_process_gdt_tss_pointer:
mov ecx,tss_data
mov edi,0
setgdtl2:
mov [edi+gdts+ tss0 +0], word tss_step
mov [edi+gdts+ tss0 +2], cx
mov eax,ecx
shr eax,16
mov [edi+gdts+ tss0 +4], al
mov [edi+gdts+ tss0 +7], ah
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
add ecx,tss_step
add edi,8
cmp edi,8*(max_processes+5)
jbe setgdtl2
ret
;build_process_gdt_gate_pointer:
; mov edi,0
; mov dx,tss0
; setidtl1:
; mov ecx,[esi]
; mov [edi+gdts+ tss0t +0], word 0
; mov [edi+gdts+ tss0t +2], dx
; mov [edi+gdts+ tss0t +4], word 11100101b*256
; mov [edi+gdts+ tss0t +6], word 0
; add dx,8
; add edi,8
; cmp edi,8*(max_processes+5)
; jb setidtl1
; ret
build_interrupt_table:
mov [l.eflags],dword 0x11002
mov [l.ss0], int_data
;mov [l.ss1], ring1_data
;mov [l.ss2], ring2_data
mov [l.esp0], 0x52000
mov [l.esp1], 0x53000
mov [l.esp2], 0x54000
mov eax,cr3
mov [l.cr3],eax
mov [l.cs],int_code
mov [l.ss],int_data
mov [l.ds],int_data
mov [l.es],int_data
mov [l.fs],int_data
mov [l.gs],int_data
mov eax,sys_int
mov [l.esp],0x720000
mov edi,0x290000
newint:
push edi
mov ebx,[eax]
mov [l.eip],ebx
mov esi,tss_sceleton
mov ecx,120/4
cld
rep movsd
pop edi
add edi,128
add [l.esp],1024
add eax,4
cmp eax,sys_int+4*0x40 ;0x60
jbe newint ;jb
;;
mov esi,boot_sched_3_2
call boot_log
mov ecx,0x290000
mov edi,0
setgdtl2i:
mov [edi+gdts+ tss0i +0], word 128
mov [edi+gdts+ tss0i +2], cx
mov eax,ecx
shr eax,16
mov [edi+gdts+ tss0i +4], al
mov [edi+gdts+ tss0i +7], ah
mov [edi+gdts+ tss0i +5], word 01010000b *256 +11101001b
add ecx,128
add edi,8
cmp edi,8*0x40 ;0x60
jbe setgdtl2i
;;
mov esi,boot_sched_3_3
call boot_log
mov edi,0
mov edx,tss0i
setidtl2:
mov [edi+idts+ 8 +0], word 0
mov [edi+idts+ 8 +2], dx
mov [edi+idts+ 8 +4], word 10000101b*256 ; task gate DPL=0
; cmp edi,0x40*8
; jne no_sw_int
; mov [edi+idts+ 8 +4], word 11100101b*256 ; task gate DPL=3
; no_sw_int:
mov [edi+idts+ 8 +6], word 0
add edx,8
add edi,8
cmp edi,8*0x40 ;0x60
jbe setidtl2 ;jb
; <Ivan Poddubny 06.02.2005>
; THIS CODE WON'T WORK ;-(
; because each process's 0-level stack points to the same area
; and if task switch occurs and another process is being interrupted
; a stack overflow happens
; The only way to solve that problem is to disable interrupts
; while 0x40-handler is working
; Then we have to make all entries in the IDT INTERRUPT gates, not TASK
; mov edi, idts+8
; mov esi, sys_int
; mov ecx, 32
; @@:
; mov eax, [esi]
; mov [edi], ax ; lower part of offset
; mov [edi+2], word os_code ; segment selector
; shr eax, 16
; mov [edi+4], word 10001110b shl 8 ; interrupt descriptor
; mov [edi+6], ax
; add esi, 4
; add edi, 8
; dec ecx
; jnz @b
; </Ivan Poddubny>
ret
build_syscall_interrupt_table:
mov [l.eflags],dword 0x11002
mov [l.ss0], int_data ;code
;mov [l.ss1], ring1_data ;code
;mov [l.ss2], ring2_data ;code
mov [l.esp0], 0x52000
mov [l.esp1], 0x53000
mov [l.esp2], 0x54000
mov eax,cr3
mov [l.cr3],eax
mov [l.cs],int_code
mov [l.ss],int_data
mov [l.ds],int_data
mov [l.es],int_data
mov [l.fs],int_data
mov [l.gs],int_data
mov [l.esp],sysint_stack_data
mov edi,0x298000
newint2:
push edi
mov ebx,i40
mov [l.eip],ebx
mov esi,tss_sceleton
mov ecx,120/4
cld
rep movsd
pop edi
add [l.esp],4096
add edi,128
;add eax,4
cmp edi,0x298000+128*(max_processes+5)
jb newint2
;;
mov ecx,0x298000
mov edi,0
setgdtl2i2:
mov [edi+gdts+ tss0sys +0], word 128
mov [edi+gdts+ tss0sys +2], cx
mov eax,ecx
shr eax,16
mov [edi+gdts+ tss0sys +4], al
mov [edi+gdts+ tss0sys +7], ah
mov [edi+gdts+ tss0sys +5], word 01010000b *256 +11101001b
add ecx,128
add edi,8
cmp edi,8*(max_processes+5)
jbe setgdtl2i2
;;
;mov dx,tss0sys
mov edi,8*0x40+idts+8
mov [edi + 0], word (i40 and ((1 shl 16)-1))
mov [edi + 2], word os_code
mov [edi + 4], word 11101110b*256
mov [edi + 6], word (i40 shr 16)
mov edi,8*0x38+idts+8
mov eax, i38
mov [edi], ax ; lower part of offset
mov [edi+2], word os_code ; segment selector
shr eax, 16
mov [edi+4], word 11101110b shl 8 ; 32-bit interrupt gate, DPL 3
mov [edi+6], ax
ret
align 4
i38:
; load data selectors
pushfd
push ds es
push eax
mov ax, os_data
mov ds, ax
mov es, ax
pop eax
pushad
push edi
mov edi, eax
mov eax, ebx
mov ebx, ecx
mov ecx, edx
mov esi, [esp]
and edi, 0xFF
call dword [servetable+edi*4]
add esp, 4
popad
pop es ds
popfd
iret
iglobal
sys_int:
dd s0,s1,s2,s3,s4,s5,s6,s7,s8,s9,sa,sb,sc,sd,se,sf
dd s10 ,s11 ; ,i_unknown12,i_unknown13
; dd i_unknown14,i_unknown15,i_unknown16,i_unknown17
; dd i_unknown18,i_unknown19,i_unknown1a,i_unknown1b
; dd i_unknown1c,i_unknown1d,i_unknown1e,i_unknown1f
times 14 dd unknown_interrupt
dd irq0 ,irq1 ,p_irq2 ,p_irq3 ,p_irq4 ,p_irq5,p_irq6 ,p_irq7
dd p_irq8,p_irq9,p_irq10,p_irq11,p_irq12,irqD ,p_irq14,p_irq15
;dd i_unknown30,i_unknown31,i_unknown32,i_unknown33
;dd i_unknown34,i_unknown35,i_unknown36,i_unknown37
;dd i_unknown38,i_unknown39,i_unknown3a,i_unknown3b
;dd i_unknown3c,i_unknown3d,i_unknown3e,i_unknown3f
times 16 dd unknown_interrupt
dd i40
endg
uglobal
tss_sceleton:
l.back dw 0,0
l.esp0 dd 0
l.ss0 dw 0,0
l.esp1 dd 0
l.ss1 dw 0,0
l.esp2 dd 0
l.ss2 dw 0,0
l.cr3 dd 0
l.eip dd 0
l.eflags dd 0
l.eax dd 0
l.ecx dd 0
l.edx dd 0
l.ebx dd 0
l.esp dd 0
l.ebp dd 0
l.esi dd 0
l.edi dd 0
l.es dw 0,0
l.cs dw 0,0
l.ss dw 0,0
l.ds dw 0,0
l.fs dw 0,0
l.gs dw 0,0
l.ldt dw 0,0
l.trap dw 0
l.io dw 0
endg
s0:
cli
mov [error_interrupt],0x0
mov [error_interrupt_entry],dword s0
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s1:
cli
mov [error_interrupt],0x1
mov [error_interrupt_entry],dword s1
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s2:
cli
mov [error_interrupt],0x2
mov [error_interrupt_entry],dword s2
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s3:
cli
mov [error_interrupt],0x3
mov [error_interrupt_entry],dword s3
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s4:
cli
mov [error_interrupt],0x4
mov [error_interrupt_entry],dword s4
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s5:
cli
mov [error_interrupt],0x5
mov [error_interrupt_entry],dword s5
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s6:
cli
mov [error_interrupt],0x6
mov [error_interrupt_entry],dword s6
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
;;;;;;;;;;;;;;;;;;;;;;;
;; FPU ERROR HANDLER ;;
;;;;;;;;;;;;;;;;;;;;;;;
align 4
s7:
; <IP 05.02.2004>
cli
; </IP>
mov edi, 7*8
mov [edi+gdts+ tss0i +5], word 01010000b *256 +11101001b
mov edi,[0x3000]
shl edi, 3
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
; save a copy of current task's TSS to fpu_tss
mov esi,[0x3000]
imul esi,tss_step
add esi,tss_data
mov edi,fpu_tss
mov ecx,120/4
cld
rep movsd
; get base address of our TSS and...
mov esi,[0x3000]
imul esi,tss_step
add esi,tss_data
; ...init segments, stack, eip, flags
mov word [esi+l.cs-tss_sceleton],int_code
mov word [esi+l.ss-tss_sceleton],int_data
mov word [esi+l.ds-tss_sceleton],int_data
mov word [esi+l.es-tss_sceleton],int_data
mov word [esi+l.fs-tss_sceleton],int_data
mov word [esi+l.gs-tss_sceleton],int_data
mov dword [esi+l.esp-tss_sceleton],fpu_stack+4*8
mov dword [esi+l.eip-tss_sceleton],fpu_handler
mov dword [esi+l.eflags-tss_sceleton],0x11002
; then execute this task
mov ebx, [0x3000]
shl ebx,3
add ebx, tss0 ;t
mov [0xB004], bx
jmp pword [0xB000]
jmp s7
s8:
cli
mov [error_interrupt],0x8
mov [error_interrupt_entry],dword s8
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s9:
cli
mov [error_interrupt],0x9
mov [error_interrupt_entry],dword s9
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
sa:
cli
mov [error_interrupt],0xa
mov [error_interrupt_entry],dword sa
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
sb:
cli
mov [error_interrupt],0xb
mov [error_interrupt_entry],dword sb
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
sc:
cli
mov [error_interrupt],0xc
mov [error_interrupt_entry],dword sc
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
sd:
cli
mov [error_interrupt],0xd
mov [error_interrupt_entry],dword sd
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
se:
cli
mov [error_interrupt],0xe
mov [error_interrupt_entry],dword se
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
sf:
cli
mov [error_interrupt],0xf
mov [error_interrupt_entry],dword sf
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s10:
cli
mov [error_interrupt],0x10
mov [error_interrupt_entry],dword s10
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
s11:
cli
mov [error_interrupt],0x11
mov [error_interrupt_entry],dword s11
call show_error_parameters
mov edx,[0x3010]
mov [edx+0xa],byte 4
jmp change_task
writehex:
pusha
mov ecx,eax
mov ax,word [printerrorat]
shl eax,16
mov ax,[esp+32+4]
sub ax,60
mov edx,1
mov esi,8
mov ebx,0xffffff
whl1:
push ecx
and ecx,0xf
add ecx,hexletters
mov edi,1
mov cl,[ecx]
mov edi,[write_error_to]
mov [edi],cl
dec [write_error_to]
pop ecx
shr ecx,4
sub eax,6*65536
dec esi
jnz whl1
popa
ret
iglobal
hexletters db '0123456789ABCDEF'
error_interrupt dd -1
error_interrupt_entry dd -1
printerrorat dd 300
process_error db 'K : Process - forced terminate INT: 00000000',13,10,0
process_pid db 'K : Process - forced terminate PID: 00000000',13,10,0
process_eip db 'K : Process - forced terminate EIP: 00000000',13,10,0
system_error db 'K : Kernel error',13,10,0
endg
uglobal
write_error_to dd 0x0
endg
show_error_parameters:
mov [write_error_to],process_pid+43
mov eax,[0x3000]
shl eax, 5
mov eax,[0x3000+4+eax]
call writehex
mov [write_error_to],process_error+43
mov eax,[error_interrupt]
call writehex
mov eax,[0x3000]
shl eax,8
cmp [0x80000+eax+0xB0],dword 0
jnz .system_error
mov eax,[0x3000]
imul eax,tss_step
mov eax,[eax+tss_data+l.eip-tss_sceleton]
.out_eip:
mov [write_error_to],process_eip+43
call writehex
mov esi,process_error
call sys_msg_board_str
mov esi,process_pid
call sys_msg_board_str
mov esi,process_eip
call sys_msg_board_str
ret
.system_error:
mov esi,system_error
call sys_msg_board_str
mov eax,[0x3000]
shl eax,7
mov eax,[eax+0x298000+l.eip-tss_sceleton]
jmp .out_eip
irq5:
call restore_caller
mov dx,word [sb16]
add dx,0xe
in al,dx
; mov byte [SB16_Status],0
mov [check_idle_semaphore],5
mov al,0x20
out 0x20,al
call return_to_caller
jmp irq5
irqD:
call restore_caller
mov dx,0xf0
mov al,0
out dx,al
mov dx,0xa0
mov al,0x20
out dx,al
mov dx,0x20
out dx,al
mov ds,cx
mov es,cx
mov fs,cx
call return_to_caller
jmp irqD
p_irq2:
call restore_caller
mov edi,2 ; 1
call irqhandler ; 2/5
call return_to_caller
jmp p_irq2
p_irq3:
call restore_caller
mov edi,3
call irqhandler
call return_to_caller
jmp p_irq3
p_irq4:
call restore_caller
mov edi,4
call irqhandler
call return_to_caller
jmp p_irq4
p_irq5:
call restore_caller
mov edi,5
call irqhandler
call return_to_caller
jmp p_irq5
p_irq6:
call restore_caller
call fdc_irq
mov edi,6
call irqhandler
call return_to_caller
jmp p_irq6
p_irq7:
call restore_caller
mov edi,7
call irqhandler
call return_to_caller
jmp p_irq7
p_irq8:
call restore_caller
mov edi,8
call irqhandler
call return_to_caller
jmp p_irq8
p_irq9:
call restore_caller
mov edi,9
call irqhandler
call return_to_caller
jmp p_irq9
p_irq10:
call restore_caller
mov edi,10
call irqhandler
call return_to_caller
jmp p_irq10
p_irq11:
call restore_caller
mov edi,11
call irqhandler
call return_to_caller
jmp p_irq11
p_irq12:
call restore_caller
mov edi,12
call irqhandler
call return_to_caller
jmp p_irq12
p_irq13:
call restore_caller
mov edi,13
call irqhandler
call return_to_caller
jmp p_irq13
p_irq14:
call restore_caller
mov edi,14
call irqhandler
call return_to_caller
jmp p_irq14
p_irq15:
call restore_caller
mov edi,15
call irqhandler
call return_to_caller
jmp p_irq15
align 4
restore_caller:
mov edi,[0x3000]
shl edi, 3
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
ret
align 4
return_to_caller:
mov ebx,[0x3000]
shl bx,3
add bx,tss0;t
mov [tss_irq12],bx
db 0xea
dd 0
tss_irq12 dw tss0;t
ret
uglobal
irqh dd 0x0
endg
irqhandler:
push edi
mov esi,edi ; 1
shl esi,6 ; 1
add esi,irq00read ; 1
shl edi,12 ; 1
add edi,0x2E0000
mov [check_idle_semaphore],5
irqnewread:
mov dx,[esi] ; 2+
cmp dx,0 ; 1
jz irqover
cmp [esi+3],byte 1 ; 2 ; byte read
jne noirqbyte ; 4-11
in al,dx
mov edx,[edi]
cmp edx,4000
je irqfull
mov ebx,edi
add ebx,0x10
add ebx,edx
mov [ebx],al
inc edx
mov [edi],edx
add esi,4
jmp irqnewread
noirqbyte:
cmp [esi+3],byte 2 ; word read
jne noirqword
in ax,dx
mov edx,[edi]
cmp edx,4000
je irqfull
mov ebx,edi
add ebx,0x10
add ebx,edx
mov [ebx],ax
add edx,2
mov [edi],edx
add esi,4
jmp irqnewread
noirqword:
irqfull:
irqover:
mov al,0x20 ; ready for next irq
out 0x20,al
pop ebx
cmp ebx,7
jbe noa0
out 0xa0,al
noa0:
ret
; this code should never get control!
; applications can use only 0x40 interrupt
unknown_interrupt:
@@: call change_task
jmp @b
compare_to_thread:
push ebx
mov eax,edx
shl eax, 3
add eax,gdts+ app_code-3
mov ebx,[eax]
cmp ebx,[old_code_0]
jne ctt0
mov ebx,[eax+4]
cmp ebx,[old_code_1]
jne ctt0
pop ebx
mov eax,1
ret
ctt0:
pop ebx
mov eax,0
ret
check_for_thread_mem:
pusha
mov ecx,[0x3004]
cftm0:
mov eax,ecx
shl eax, 8
add eax,gdts+ app_code-3
mov ebx,[eax]
cmp ebx,[old_code_0]
jne cftm1
mov ebx,[eax+4]
cmp ebx,[old_code_1]
jne cftm1
mov eax,ecx ; new code segments
shl eax, 3 ;imul eax,8
add eax,gdts+ app_code-3
mov ebx,[new_code_0]
mov [eax],ebx
mov ebx,[new_code_1]
mov [eax+4],ebx
mov eax,ecx ; new data segments
shl eax, 3
add eax,gdts+ app_data-3
mov ebx,[new_data_0]
mov [eax],ebx
mov ebx,[new_data_1]
mov [eax+4],ebx
cmp [new_pos],0 ; new memory position segments
je no_new_postition_for_thread
mov eax,ecx
shl eax, 5
add eax,0x3000
mov ebx,[new_pos]
mov [eax+0x10],ebx
no_new_postition_for_thread:
mov eax,ecx ; new amount of memory
shl eax, 8
add eax,0x80000
mov ebx,[new_amount]
mov [eax+0x8C],ebx
cftm1:
dec ecx
jnz cftm0
popa
ret
save_for_thread_check:
; save for thread check
pusha
mov esi,[0x3000]
;imul esi,8
shl esi, 3
add esi,gdts+ app_code-3 +0
mov edi,old_code_0
mov ecx,8
cld
rep movsb
popa
ret
save_new_position_for_threads:
; new code segment for thread check
pusha
mov esi,[0x3000]
;imul esi,8
shl esi, 3
add esi,gdts+ app_code-3 +0
mov edi,new_code_0
mov ecx,8
cld
rep movsb
popa
; new data segment for thread check
pusha
mov esi,[0x3000]
;imul esi,8
shl esi, 3
add esi,gdts+ app_data-3 +0
mov edi,new_data_0
mov ecx,8
cld
rep movsb
popa
ret
set_application_table_status:
push eax
mov eax,[0x3000]
;imul eax,32
shl eax, 5
add eax,0x3000+4
mov eax,[eax]
mov [application_table_status],eax
pop eax
ret
clear_application_table_status:
push eax
mov eax,[0x3000]
;imul eax,32
shl eax, 5
add eax,0x3000+4
mov eax,[eax]
cmp eax,[application_table_status]
jne apptsl1
mov [application_table_status],0
apptsl1:
pop eax
ret
uglobal
old_code_0 dd 0x0
old_code_1 dd 0x0
;
new_code_0 dd 0x0
new_code_1 dd 0x0
new_data_0 dd 0x0
new_data_1 dd 0x0
new_pos dd 0x0
new_amount dd 0x0
endg
sys_resize_app_memory:
; eax = 1 - resize
; ebx = new amount of memory
cmp eax,1
jne no_application_mem_resize
mov eax,[0x3010]
cmp dword [eax+0x10],std_application_base_address
jz new_mem_resize ;resize for new type of processes
add ebx,4095
shr ebx,12
shl ebx,12
mov ebp,ebx
; wait for process table to be free
rsm0:
cli
cmp [application_table_status],0
je rsm1
sti
call change_task
jmp rsm0
rsm1:
call set_application_table_status
sti
cmp ebx,0 ; other than zero
je mem_resize_unsuccess
call save_for_thread_check
; find a free place
mov esi,[0xfe84] ; application memory start
mov edi,ebp
add edi,esi
dec edi
rfgdt:
mov edx,2
rfindgdtl1:
call compare_to_thread
cmp eax,1
je rfindfl3
mov ecx,edx
shl ecx,3
; eax run base -> ebx limit
mov al,[ecx+gdts+ app_code-3 +4]
mov ah,[ecx+gdts+ app_code-3 +7]
shl eax,16
mov ax,[ecx+gdts+ app_code-3 +2]
;!!mem
cmp eax,std_application_base_address
jz rfindfl3
;!!mem
movzx ebx,word [ecx+gdts+ app_code-3 +0]
shl ebx,12
add ebx,eax
cmp eax,edi
jg rfindfl3
cmp ebx,esi
jb rfindfl3
add esi,4096
add edi,4096
cmp edi,[0xfe8c] ; < c_memory
jbe rfgdt
jmp rfind_free_ret_2 ;; not enough memory
rfindfl3:
inc edx
cmp edx,[0x3004]
jbe rfindgdtl1
rfindfl1:
rthread_c:
mov ecx,[0x3000]
shl ecx,3
inc edi
sub edi,esi
add edi,4095
shr edi,12
dec edi
; code
mov eax,esi
mov ebx,edi
mov [ecx+gdts+ app_code-3 +2], ax ; base 0:15
shr eax,16
mov [ecx+gdts+ app_code-3 +4], al ; base 23:16
mov [ecx+gdts+ app_code-3 +7], ah ; base 31:24
mov [ecx+gdts+ app_code-3 +0], bx ; limit
; data
mov eax,esi
mov [ecx+gdts+ app_data-3 +2], ax ; base 0:15
shr eax,16
mov [ecx+gdts+ app_data-3 +4], al ; base 23:16
mov [ecx+gdts+ app_data-3 +7], ah ; base 31:24
movzx edx,word [ecx+gdts+ app_code-3 +0] ; save limit
mov [ecx+gdts+ app_data-3 +0], bx ; limit
and ebx,0xffff
cmp ebx,edx ; copy smaller from memory sizes
jge noedxebxxchg
mov edx,ebx
noedxebxxchg:
movzx ecx,dx
shl ecx,12
add ecx,4096
mov edi,esi
mov eax,[0x3010]
mov esi,[eax+0x10]
mov [eax+0x10],edi ; new memory position
mov eax,[0x3000] ; new memory size
shl eax,8
add eax,0x80000
mov [eax+0x8c],ebp
mov [new_pos],edi ; new position for threads
mov [new_amount],ebp ; new amount of mem for threads
cmp esi,edi
je no_app_move
cld
rep movsb ; move the app image to the new position
no_app_move:
call save_new_position_for_threads
call check_for_thread_mem
mov [application_table_status],0
mov [esp+36],dword 0 ; eax <- 0 ; successfull
ret
rfind_free_ret_2:
mem_resize_unsuccess:
mov [application_table_status],0
mov [esp+36],dword 1 ; eax <- 1 ; unsuccessfull
ret
no_application_mem_resize:
ret
align 4
find_free_mem:
push eax
push ebx
push ecx
push edx
push edi
call find_free_process_slot
mov eax,[new_process_place]
cmp eax,max_processes
jg find_free_ret_2
cmp [thread_create],1
je thread_c
mov esi,[0xfe84]
add edi,esi
dec edi
mov eax,2
cmp dword [0x3004],1
je findf4
fgdt:
mov edx,2
findgdtl1:
mov ecx,edx
shl ecx,3
; eax run base -> ebx limit
mov al,[ecx+gdts+ app_code-3 +4]
mov ah,[ecx+gdts+ app_code-3 +7]
shl eax,16
mov ax,[ecx+gdts+ app_code-3 +2]
;!!mem
cmp eax,std_application_base_address
jz findfl3
;!!mem
movzx ebx,word [ecx+gdts+ app_code-3 +0]
shl ebx,12
add ebx,eax
cmp eax,edi
jg findfl3
cmp ebx,esi
jb findfl3
add esi,4096
add edi,4096
cmp edi,[0xfe8c] ; < c_memory
jbe fgdt
jmp find_free_ret_2
findfl3:
inc edx
cmp edx,[check_processes]
jbe findgdtl1
findfl1:
thread_c:
mov eax,[new_process_place]
findf4:
mov [first_gdt_search],eax
mov [gdt_place],eax
mov ecx,eax
shl ecx,3
inc edi
sub edi,esi
add edi,4095
shr edi,12
dec edi
; code
mov eax,esi
mov ebx,edi
mov [ecx+gdts+ app_code-3 +2], ax ; base 0:15
shr eax,16
mov [ecx+gdts+ app_code-3 +4], al ; base 23:16
mov [ecx+gdts+ app_code-3 +7], ah ; base 31:24
mov [ecx+gdts+ app_code-3 +0], bx ; limit
mov [ecx+gdts+ app_code-3 +5], word 11010000b *256 +11111010b
; data
mov eax,esi
mov [ecx+gdts+ app_data-3 +2], ax ; base 0:15
shr eax,16
mov [ecx+gdts+ app_data-3 +4], al ; base 23:16
mov [ecx+gdts+ app_data-3 +7], ah ; base 31:24
mov [ecx+gdts+ app_data-3 +0], bx ; limit
mov [ecx+gdts+ app_data-3 +5], word 11010000b *256 +11110010b
push esi
mov esi,process_loading
call sys_msg_board_str
pop esi
find_free_ret:
pop edi
pop edx
pop ecx
pop ebx
pop eax
ret
find_free_ret_2:
cmp [dec3004],0
je no3004inc
dec dword [0x3004]
no3004inc:
pop edi
pop edx
pop ecx
pop ebx
pop eax
mov esi,0
ret
get_app_params:
push eax
cmp [0x90000+6],word '00'
jne no_00_header
mov eax,[0x90000+12]
mov [app_start],eax
mov eax,[0x90000+16]
mov [app_i_end],eax
mov eax,[0x90000+20]
mov [app_mem],eax
shr eax,1
sub eax,0x10
mov [app_esp],eax
mov eax,[0x90000+24]
mov [app_i_param],eax
mov [app_i_icon],dword 0
pop eax
mov esi,1
ret
no_00_header:
cmp [0x90000+6],word '01'
jne no_01_header
mov eax,[0x90000+12]
mov [app_start],eax
mov eax,[0x90000+16]
mov [app_i_end],eax
mov eax,[0x90000+20]
mov [app_mem],eax
mov eax,[0x90000+24]
mov [app_esp],eax
mov eax,[0x90000+28]
mov [app_i_param],eax
mov eax,[0x90000+32]
mov [app_i_icon],eax
pop eax
mov esi,1
ret
no_01_header:
pop eax
mov esi,0
ret
start_application_fl:
jmp new_start_application_fl
;************************************************************************
start_application_floppy:
jmp new_start_application_floppy
;********************************************************************
start_application_hd:
jmp new_start_application_hd
uglobal
threadstring dd 0x0
new_process_place dd 0x0
check_processes dd 0x0
dec3004 db 0x0
app_start dd 0x0
app_i_end dd 0x0
app_mem dd 0x0
app_esp dd 0x0
app_i_param dd 0x0
app_i_icon dd 0x0
app_mem_pos dd 0x0
thread_create dd 0x0
gdt_place dd 0x0
endg
iglobal
hd_app_string db 'HDAPP '
process_loading db 'K : Process - loading ',13,10,0
process_running db 'K : Process - done',13,10,0
first_gdt_search dd 0x2
endg
sys_threads:
; eax=1 create thread
;
; ebx=thread start
; ecx=thread stack value
;
; on return : eax = pid
jmp new_sys_threads
cli
cmp [application_table_status],0
je stth9
sti
call change_task
jmp sys_threads
stth9:
call set_application_table_status
sti
cmp eax,1
jne no_sys_thread_create
cli
mov eax,[0x3010]
mov eax,[eax+0x10]
mov [app_mem_pos],eax
mov [app_i_param],0
mov [app_i_icon],0
mov [app_start],ebx
mov [app_esp],ecx
mov ebx,[0x3000]
shl ebx,8
add ebx,0x80000
mov [threadstring],ebx
mov ebx,[ebx+0x8c]
mov [app_mem],ebx
mov esi,[app_mem_pos]
mov edi,[app_mem]
add edi,esi
dec edi
mov [thread_create],1
call find_free_mem
cmp esi,0
jne th_cr1
mov [application_table_status],0
mov eax,1 ; no free memory
sti
ret
th_cr1:
push dword 0
push dword [threadstring]
jmp add_app_parameters
no_sys_thread_create:
mov eax,-1
mov [application_table_status],0
ret
find_free_process_slot:
pusha
mov ebx,[0x3004]
mov [check_processes],ebx
inc ebx
mov [new_process_place],ebx
mov ebx,2
newfps:
mov eax,ebx
;imul eax,0x20
shl eax, 5
add eax,0x3000+0xa
cmp [eax],byte 9
je ffpl
inc ebx
cmp ebx,[0x3004]
jbe newfps
;mov [dec3004],0
mov [dec3004],1
shl ebx,5
mov [0x3000+0xa+ebx],byte 9
inc dword [0x3004]
popa
ret
ffpl:
;mov [dec3004],1
;dec dword [0x3004]
mov [dec3004],0
mov [new_process_place],ebx
popa
ret
add_app_parameters:
; returns: eax = pid or -1 if unsuccesfull
cmp [app_i_param],dword 0 ; parameter
jz no_app_params
xor eax, eax
mov edi,[app_i_param]
add edi,[app_mem_pos]
mov ecx,256/4
cld
rep stosd
mov esi,[esp+4]
test esi, esi
jz no_app_params
mov eax,[app_i_param]
add eax,[app_mem_pos]
mov edi,eax
mov ecx,256
cld
app_new_param:
cmp [esi],byte 0
jz no_app_params
movsb
loop app_new_param
no_app_params:
;inc dword [0x3004] ; increase number of processes
mov ebx,[new_process_place]
mov edi,ebx ; clear 0x80000 (256 bytes)
shl edi,8
add edi,0x80000
mov ecx,256 / 4
mov eax,0
cld
rep stosd
shl ebx,5 ; * 32 +0x3000
add ebx,0x3000
mov al,byte [new_process_place] ; screen id ?
mov [ebx+0xe],al
mov [ebx],dword 1+2+4 ; report events: windowdraw, key, button
inc dword [process_number] ; process id number
mov eax,[process_number]
mov [ebx+4],eax
mov ecx,ebx ; set draw limits
add ecx,draw_data-0x3000
mov [ecx+0],dword 0
mov [ecx+4],dword 0
mov eax,[0xfe00]
mov [ecx+8],eax
mov eax,[0xfe04]
mov [ecx+12],eax
mov eax,[app_mem_pos] ; position in memory
mov [ebx+0x10],eax
; TSS
xor ebx,ebx
cmp [thread_create],ebx
jnz clone_cr3_table
mov eax,[new_process_place]
call create_app_cr3_table
jmp set_cr3
clone_cr3_table:
; mov eax,[new_process_place]
; mov ebx,[0x3000]
; call addreference_app_cr3_table
mov eax,[0x3000]
call get_cr3_table
set_cr3:
add eax,8+16
mov [l.cr3],eax
mov eax,[app_start]
mov [l.eip],eax
mov eax,[app_esp]
mov [l.esp],eax
mov ebx,[new_process_place] ; gdt's
shl ebx,3
mov ax,app_code
add ax,bx
mov [l.cs],ax
mov ax,app_data
add ax,bx
mov [l.ss],ax
mov [l.ds],ax
mov [l.es],ax
mov [l.fs],ax
mov ax,graph_data
mov [l.gs],ax
mov [l.io],word 128
mov [l.eflags],dword 0x11202
mov [l.ss0], os_data
;mov [l.ss1], ring1_data
;mov [l.ss2], ring2_data
; [Ivan 07.03.2005]
mov [l.esp0], 0x8000 ;0x55000 ; used by i38 handler
; [/Ivan 07.03.2005]
mov [l.esp1], 0x56000
mov [l.esp2], 0x57000
mov eax,tss_sceleton ; move tss to tss_data+
mov ebx,[new_process_place]
imul ebx,tss_step
add ebx,tss_data
mov ecx,120
call memmove
; Add IO access table
or eax, -1
mov edi, [new_process_place]
imul edi, tss_step
add edi, tss_data + 128
mov ecx, 2048 ; for 2048 * 4 * 8 bits = 65536 ports
cld
rep stosd
; make sure gdt is pointing to the process
; and not to i40 handler
mov ecx,ebx
mov edi,[new_process_place]
; imul edi,8
shl edi, 3
mov [edi+gdts+ tss0 +0], word tss_step ; limit 0:15
mov [edi+gdts+ tss0 +2], cx ; base 0:15
mov eax,ecx
shr eax,16
mov [edi+gdts+ tss0 +4], al ; base 23:16
mov [edi+gdts+ tss0 +7], ah ; base 31:24
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
pop eax
pop ebx
mov ebx,[new_process_place] ; save name of the process
shl ebx,8
add ebx,0x80000
mov ecx,11
call memmove
mov ebx,[new_process_place] ; save image size
shl ebx,8
add ebx,0x80000+0x8C
mov eax,[app_mem]
mov [ebx],eax
mov [0xf400],byte 0 ; empty keyboard buffer
mov [0xf500],byte 0 ; empty button buffer
mov [application_table_status],0
mov eax,[process_number]
mov ebx,[new_process_place]
shl ebx, 5 ;imul ebx,0x20
mov [0x3000+ebx+0xa],byte 0
mov edi,[new_process_place]
shl edi,5
add edi,window_data
mov ebx,[new_process_place]
movzx esi, word [0xC000 + ebx*2]
lea esi, [0xC400 + esi*2]
call windowactivate
sti
push esi
mov esi,process_running
call sys_msg_board_str
pop esi
ret
iglobal
process_terminating db 'K : Process - terminating',13,10,0
process_terminated db 'K : Process - done',13,10,0
endg
terminate: ; terminate application
push esi
mov esi,process_terminating
call sys_msg_board_str
pop esi
;start memory manager code
; mov eax,esi
; call MEM_Heap_Clean
;end memory manager code
cli
cmp [application_table_status],0
je term9
sti
call change_task
jmp terminate
term9:
call set_application_table_status
mov eax,esi
call dispose_app_cr3_table
mov [first_gdt_search],0x2 ; start gdt search from beginning
cmp [prev_user_of_fpu],esi ; if user fpu last -> fpu user = 1
jne fpu_ok_1
mov [prev_user_of_fpu],1
fpu_ok_1:
mov [0xf400],byte 0 ; empty keyboard buffer
mov [0xf500],byte 0 ; empty button buffer
mov ecx,esi ; clear memory reserv.
shl ecx,3
mov [ecx+gdts+ app_code-3 +0],dword 0
mov [ecx+gdts+ app_code-3 +4],dword 0
mov [ecx+gdts+ app_data-3 +0],dword 0
mov [ecx+gdts+ app_data-3 +4],dword 0
mov edi, esi
; shl edi, 5
; add edi, 0x3000
; cmp [edi+0xa],byte 3 ; if normal terminate then clear int40 handler
; jne nocl40
; mov edi,esi ; free the used interrupt 0x40 handler
; shl edi, 8 ;imul edi,256
; mov eax,[edi+0x80000+0xb0]
; cmp eax,0 ; is application using a systemcall interrupt ?
; je nocl40
mov [usedi40+eax],byte 0
; mov edi,8
; imul edi,eax
mov edi, eax
shl edi, 3
mov [edi+tss0sys_l +5], word 01010000b *256 +11101001b
; mov edi,128
; imul edi,eax
mov edi, eax
shl edi, 7
mov [edi+0x298000+l.eip-tss_sceleton],dword i40
mov [edi+0x298000+l.eflags-tss_sceleton],dword 0x11002
mov ebx,eax
shl ebx, 12 ;imul ebx,4096
add ebx,sysint_stack_data
mov [edi+0x298000+l.esp-tss_sceleton],ebx
nocl40:
mov ecx,esi ; remove buttons
bnewba2:
mov edi,[0xfe88]
mov eax,edi
cld
movzx ebx,word [edi]
inc bx
bnewba:
dec bx
jz bnmba
add eax,0x10
cmp cx,[eax]
jnz bnewba
pusha
mov ecx,ebx
inc ecx
shl ecx,4
mov ebx,eax
add eax,0x10
call memmove
dec dword [edi]
popa
jmp bnewba2
bnmba:
pusha ; save window coordinates for window restoring
cld
shl esi,5
add esi,window_data
mov ax,[esi+0]
mov word [dlx],ax
mov bx,[esi+8]
add ax,bx
mov word [dlxe],ax
mov ax,[esi+4]
mov word [dly],ax
mov bx,[esi+12]
add ax,bx
mov word [dlye],ax
mov [esi+0],word 0
mov [esi+8],word 5
mov ax,[0xFE04]
mov [esi+4],ax
mov [esi+12],word 5
xor eax, eax
mov [esi+16],eax;dword 0
mov [esi+20],eax;dword 0
mov [esi+24],eax;dword 0
mov [esi+28],eax;dword 0
popa
pusha
mov edi,esi
shl edi,5
add edi,window_data
mov ecx,32/4
xor eax, eax
; cld
rep stosd
mov eax,[0xFE04] ; set window to start from maxy+1
add eax,2
mov edi,esi
shl edi,5
add edi,window_data
mov [edi+4],eax
popa
pusha
mov edi,esi
shl edi,5
add edi,draw_data
mov ecx,32/4
xor eax, eax
; cld
rep stosd
popa
pusha ; at 0x80000+
mov edi,esi
shl edi,8
add edi,0x80000
mov ecx,256/4
xor eax, eax
; cld
rep stosd
popa
pusha ; name to spaces
mov edi,esi
shl edi,8
add edi,0x80000
mov ecx,11
mov eax,' '
; cld
rep stosb
popa
pusha ; C000 --> C400
mov eax, 0xc000
mov esi, 0
nlc40:
add eax, 2
inc esi
cmp esi, [0x3004]
jae nlc41
movzx ecx, word [eax]
mov [0xC400 + ecx*2], si
jmp nlc40
nlc41:
; ivan 08.12.2004 begin
;mov ebx, [0x3004]
;dec ebx
;lea esi, [0xC400 + ebx*2]
;call windowactivate
; ivan 08.12.2004 end
popa
pusha ; remove hd1 reservation
mov edx,esi
shl edx, 5 ;imul edx,0x20
add edx,0x3000
mov edx,[edx+4]
cmp [hd1_status],edx
jne no_hd1_s_remove
mov [hd1_status],0
no_hd1_s_remove:
popa
pusha ; remove all irq reservations
mov edx,esi
shl edx, 5 ;imul edx,0x20
add edx,0x3000
mov edx,[edx+4]
mov edi,irq_owner
mov ecx,16
newirqfree:
cmp [edi],edx
jne nofreeirq
mov [edi],dword 0
nofreeirq:
add edi,4
loop newirqfree
popa
pusha ; remove all port reservations
mov edx,esi
shl edx, 5 ;imul edx,0x20
add edx,0x3000
mov edx,[edx+4]
rmpr0:
mov esi,[0x2d0000]
cmp esi,0
je rmpr9
rmpr3:
mov edi,esi
shl edi,4
add edi,0x2d0000
cmp edx,[edi]
je rmpr4
dec esi
jnz rmpr3
jmp rmpr9
rmpr4:
mov ecx,256
sub ecx,esi
shl ecx,4
mov esi,edi
add esi,16
cld
rep movsb
dec dword [0x2d0000]
jmp rmpr0
rmpr9:
popa
mov edi,esi ; do not run this process slot
shl edi, 5 ;imul edi,0x20
; add edi,0x3000
mov [edi+0x300A],byte 9
; call systest
sti ; .. and life goes on
; movzx eax,word [dlx]
; movzx ebx,word [dly]
; movzx ecx,word [dlxe]
; movzx edx,word [dlye]
call calculatescreen
xor eax, eax
xor esi, esi
call redrawscreen
mov [0xfff4],byte 0 ; no mouse background
mov [0xfff5],byte 0 ; draw mouse
mov [application_table_status],0
mov esi,process_terminated
call sys_msg_board_str
;* start code - fix error redraw for terminate (2) - Mario79
; cmp [draw_present],1
; je no_draw_background_temp
; mov [0xfff0],byte 1
;no_draw_background_temp:
; mov [draw_present],0
ret
;draw_present db 0
;* end code - fix error redraw for terminate (2) - Mario79
iglobal
boot_sched_1 db 'Building gdt tss pointer',0
;boot_sched_2 db 'Building gdt gate pointer',0
boot_sched_3 db 'Building interrupt table - TSS',0
boot_sched_3_2 db 'Building interrupt table - GDT',0
boot_sched_3_3 db 'Building interrupt table - IDT',0
boot_sched_4 db 'Building syscall interrupt table',0
endg
build_scheduler:
; { Ivan 06.03.2005
mov edi, usedi40
mov ecx, 256/4
xor eax, eax
rep stosd
; } Ivan 06.03.2005
mov esi,boot_sched_1
call boot_log
call build_process_gdt_tss_pointer
; mov esi,boot_sched_2
; call boot_log
; call build_process_gdt_gate_pointer
mov esi,boot_sched_3
call boot_log
call build_interrupt_table
mov esi,boot_sched_4
call boot_log
call build_syscall_interrupt_table
ret