;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; 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
app_code_l:
dw ((0x80000000-std_application_base_address) shr 12) and 0xffff
dw 0
db 0
dw 11010000b*256+11111010b+256*((0x80000000-std_application_base_address) shr 28)
db std_application_base_address shr 24
app_data_l:
dw (0x80000000-std_application_base_address) shr 12 and 0xffff
dw 0
db 0
dw 11010000b*256+11110010b+256*((0x80000000-std_application_base_address) shr 28)
db std_application_base_address shr 24
graph_data_l:
dw 0x3ff
dw 0x0000
db 0x00
dw 11010000b *256 +11110010b
db 0x00
tss0_l:
times (max_processes+10) dd 0,0
gdte:
idtreg:
dw 8*0x41-1
dd idts+8
label idts at 0xB100-8
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
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_interrupt_table:
mov edi, idts+8
mov esi, sys_int
mov ecx, 0x40
@@:
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
;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)
ret
iglobal
sys_int:
dd e0,debug_exc,e2,e3,e4,e5,e6,e7,e8,e9,e10,e11,e12,e13,e14,e15
dd e16,e17
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
times 16 dd unknown_interrupt
dd i40
endg
macro save_ring3_context
{
push ds es
pushad
}
macro restore_ring3_context
{
popad
pop es ds
}
; simply return control to interrupted process
unknown_interrupt:
iret
macro exc_wo_code [num]
{
forward
e#num :
save_ring3_context
mov bl, num
jmp exc_c
}
macro exc_w_code [num]
{
forward
e#num :
add esp, 4
save_ring3_context
mov bl, num
jmp exc_c
}
exc_wo_code 0, 1, 2, 3, 4, 5, 6, 9, 15, 16 ; 18, 19
exc_w_code 8, 10, 11, 12, 13, 14, 17
exc_c:
mov ax, os_data
mov ds, ax
mov es, ax
; test if debugging
cli
mov eax, [0x3000]
shl eax, 8
mov eax, [0x80000+eax+0xAC]
test eax, eax
jnz .debug
sti
; not debuggee => say error and terminate
add esp, 28h
movzx eax, bl
mov [error_interrupt], eax
call show_error_parameters
mov edx, [0x3010]
mov [edx + 0xA], byte 4
jmp change_task
.debug:
; we are debugged process, notify debugger and suspend ourself
; eax=debugger PID
movzx ecx, bl
push ecx
mov ecx, [0x3010]
push dword [ecx+4] ; PID of current process
push 12
pop ecx
push 1 ; 1=exception
call debugger_notify
pop ecx
pop ecx
pop ecx
mov edx, [0x3010]
mov byte [edx+0xA], 1 ; suspended
call change_task
restore_ring3_context
iretd
;;;;;;;;;;;;;;;;;;;;;;;
;; FPU ERROR HANDLER ;;
;;;;;;;;;;;;;;;;;;;;;;;
align 4
e7:
save_ring3_context
clts
mov ax, os_data
mov ds, ax
mov es, ax
mov eax, [prev_user_of_fpu]
shl eax, 8
add eax, 0x80000 + 0x10
fsave [eax]
mov eax, [0x3000]
mov [prev_user_of_fpu], eax
shl eax, 8
add eax, 0x80000
cmp [eax + 0x7f], byte 0
je @f
frstor [eax+0x10]
@@:
mov [eax + 0x7f], byte 1
restore_ring3_context
iret
iglobal
prev_user_of_fpu dd 1
endg
writehex:
pusha
mov edi, [write_error_to]
mov esi, 8
@@:
mov ecx, eax
and ecx, 0xf
mov cl,[ecx+hexletters]
mov [edi],cl
dec edi
shr eax,4
dec esi
jnz @b
popa
ret
iglobal
hexletters db '0123456789ABCDEF'
error_interrupt dd -1
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
cmp dword [esp+4+4], os_code ; CS
jnz @f
mov esi,system_error
call sys_msg_board_str
@@:
mov eax, [esp+4] ; 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
; irq1 -> hid/keyboard.inc
macro irqh [num]
{
forward
p_irq#num :
save_ring3_context
mov edi, num
jmp irq_c
}
irqh 2,5,7,8,9,10,11,14,15
irq_c:
mov ax, os_data
mov ds, ax
mov es, ax
call irqhandler
restore_ring3_context
iret
p_irq6:
save_ring3_context
mov ax, os_data
mov ds, ax
mov es, ax
call fdc_irq
call ready_for_next_irq
restore_ring3_context
iret
p_irq3:
save_ring3_context
mov ax, os_data
mov ds, ax
mov es, ax
cmp [com2_mouse_detected],0
je old_irq3_handler
call check_mouse_data_com2
jmp p_irq3_1
old_irq3_handler:
mov edi,3
call irqhandler
p_irq3_1:
restore_ring3_context
iret
p_irq4:
save_ring3_context
mov ax, os_data
mov ds, ax
mov es, ax
cmp [com1_mouse_detected],0
je old_irq4_handler
call check_mouse_data_com1
jmp p_irq4_1
old_irq4_handler:
mov edi,4
call irqhandler
p_irq4_1:
restore_ring3_context
iret
p_irq12:
save_ring3_context
mov ax, os_data
mov ds, ax
mov es, ax
call check_mouse_data_ps2
restore_ring3_context
iret
ready_for_next_irq:
mov [check_idle_semaphore],5
mov al, 0x20
out 0x20, al
ret
ready_for_next_irq_1:
mov [check_idle_semaphore],5
mov al, 0x20
out 0xa0,al
out 0x20, al
ret
irqD:
save_ring3_context
mov ax, os_data
mov ds, ax
mov es, ax
mov dx,0xf0
mov al,0
out dx,al
mov dx,0xa0
mov al,0x20
out dx,al
mov dx,0x20
out dx,al
restore_ring3_context
iret
irqhandler:
push edi
mov esi,edi ; 1
shl esi,6 ; 1
add esi,irq00read ; 1
shl edi,12 ; 1
add edi,0x2E0000
mov ecx,16
mov [check_idle_semaphore],5
irqnewread:
dec ecx
js irqover
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
set_application_table_status:
push eax
mov eax,[0x3000]
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]
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
sys_resize_app_memory:
; eax = 1 - resize
; ebx = new amount of memory
cmp eax,1
jne .no_application_mem_resize
jmp new_mem_resize ;resize for new type of processes
.no_application_mem_resize:
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
new_process_place dd 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
appl_path dd 0x0
appl_path_size 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
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
@@:
cli
cmp [application_table_status],0
je term9
sti
call change_task
jmp @b
term9:
call set_application_table_status
mov eax,esi
call dispose_app_cr3_table
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 ; 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
; debuggee test
pushad
mov edi, esi
shl edi, 5
mov eax, [0x80000+edi*8+0xAC]
test eax, eax
jz .nodebug
push 8
pop ecx
push dword [0x3000+edi+0x4] ; PID
push 2
call debugger_notify
pop ecx
pop ecx
.nodebug:
popad
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:
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 [deleted_process],esi
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
mov [edi+0x300A],byte 9
; debugger test - terminate all debuggees
mov eax, 2
mov ecx, 0x80000+2*0x100+0xAC
.xd0:
cmp eax, [0x3004]
ja .xd1
cmp dword [ecx], esi
jnz @f
and dword [ecx], 0
pushad
xchg eax, ebx
mov eax, 2
call sys_system
popad
@@:
inc eax
add ecx, 0x100
jmp .xd0
.xd1:
; 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
cli
mov eax,[deleted_process]
cmp eax,[active_process]
jne no_activate_process
call read_active_process_stack
no_activate_process:
sti
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
ret
save_active_process_stack:
cmp [active_proc_stack_coun],0xa400+0x400-4
jne @f
mov [active_proc_stack_coun],0xa400-4
@@:
push eax
push ebx
mov eax,[active_process]
shl eax,5
add eax,0x3000
mov [eax-twdw+31],byte 1
add [active_proc_stack_coun],4
mov eax,[active_process]
mov ebx,[active_proc_stack_coun]
mov [ebx],eax
pop ebx
pop eax
ret
read_active_process_stack:
cmp [active_proc_stack_coun],0xa400-4
jne @f
mov [active_proc_stack_coun],0xa400+0x400-4
@@:
push eax
push ebx
mov ebx,[active_proc_stack_coun]
mov eax,[ebx]
mov [0xff01],eax ; activate
sub [active_proc_stack_coun],4
mov [active_process_flag],1
pop ebx
pop eax
ret
iglobal
boot_sched_1 db 'Building gdt tss pointer',0
boot_sched_2 db 'Building IDT table',0
endg
build_scheduler:
mov esi,boot_sched_1
call boot_log
call build_process_gdt_tss_pointer
mov esi,boot_sched_2
call boot_log
call build_interrupt_table
ret