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All exceptions use Interrupt Gate

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Better FPU exception handler
Code cleanups
Correct save_registers for i40 handler (syscall trace)
Updated memmap.inc

git-svn-id: svn://kolibrios.org@6 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Ivan Poddubny 2005-10-13 17:50:36 +00:00
parent bc47ee30d7
commit 2e93336e82
6 changed files with 173 additions and 380 deletions
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62
kernel/trunk/core/fpu.inc
View File

@ -1,62 +0,0 @@
iglobal
prev_user_of_fpu dd 0x1 ; set to OS
endg
label fpu_tss at 0xB080
label fpu_stack dword at 0xB060
align 4
fpu_handler:
; clear TS flag in CR0 -> for task switching
clts
; save FPU context of the previous task
mov eax,[prev_user_of_fpu]
shl eax,8
add eax,0x80000+0x10
fsave [eax]
; next task switch save our FPU context
; now restore context of current task (if exists)
mov eax,[0x3000]
mov [prev_user_of_fpu],eax
shl eax,8
add eax,0x80000
cmp [eax+0x7f],byte 0
je bs7_first_fpu
frstor [eax+0x10]
bs7_first_fpu:
mov [eax+0x7f],byte 1
; prepare structure in stack for proper IRET
movzx eax,word [fpu_tss+l.ss-tss_sceleton] ; push ss
push eax
mov eax,[fpu_tss+l.esp-tss_sceleton] ; push esp
push eax
mov eax,[fpu_tss+l.eflags-tss_sceleton] ; push eflags
push eax
movzx eax,word [fpu_tss+l.cs-tss_sceleton] ; push cs
push eax
mov eax,[fpu_tss+l.eip-tss_sceleton] ; push eip
push eax
; save eax
push dword [fpu_tss+l.eax-tss_sceleton]
; restore all segment registers
mov ax,[fpu_tss+l.es-tss_sceleton]
mov es,ax
mov ax,[fpu_tss+l.fs-tss_sceleton]
mov fs,ax
mov ax,[fpu_tss+l.gs-tss_sceleton]
mov gs,ax
mov ax,[fpu_tss+l.ds-tss_sceleton]
mov ds,ax
; restore eax
pop eax
iret

22
kernel/trunk/core/sched.inc
View File

@ -5,23 +5,13 @@ label timer_ticks dword at 0xFDF0
;; IRQ0 HANDLER (TIMER INTERRUPT) ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 32
irq0:
cmp [error_interrupt],-1
je no_error_in_previous_process
mov edi,[error_interrupt]
shl edi, 3
mov [edi+tss0i_l +5], word 01010000b *256 +11101001b
mov edi,[error_interrupt]
shl edi,7
add edi,0x290000
mov esi,[error_interrupt_entry]
mov [edi+l.eip-tss_sceleton],esi
mov [edi+l.eflags-tss_sceleton],dword 0x11002
mov [0xffff],byte 0
mov [error_interrupt],-1
@ -85,13 +75,6 @@ irq0:
do_not_change_task:
;mov edx,[0x3000]
;lea edx,[tss0sys+8*edx]
;mov [8*0x40+idts+8+0], word 0
;mov [8*0x40+idts+8+2],dx
;mov [8*0x40+idts+8+4],word 11100101b*256
;mov [8*0x40+idts+8+6], word 0
call _rdtsc
mov [edi+0x18],eax
@ -113,6 +96,7 @@ irq0:
.switch:
jmp pword [0xB000]
inc [context_counter] ;noname & halyavin
jmp irq0
iglobal

340
kernel/trunk/core/sys32.inc
View File

@ -68,7 +68,6 @@ gdte:
; <IP 05.02.2005>
idtreg:
dw 8*0x41-1
dd idts+8
@ -76,20 +75,8 @@ idtreg:
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
@ -177,44 +164,32 @@ build_interrupt_table:
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
cmp edi,8*0x40
jb @b
; <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>
; Exceptions
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
ret
@ -230,32 +205,6 @@ build_syscall_interrupt_table:
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:
@ -311,7 +260,9 @@ uglobal
endg
s0:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x0
mov [error_interrupt_entry],dword s0
@ -325,7 +276,9 @@ s0:
s1:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x1
mov [error_interrupt_entry],dword s1
@ -338,7 +291,9 @@ s1:
jmp change_task
s2:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x2
mov [error_interrupt_entry],dword s2
@ -351,7 +306,9 @@ s2:
jmp change_task
s3:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x3
mov [error_interrupt_entry],dword s3
@ -364,7 +321,9 @@ s3:
jmp change_task
s4:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x4
mov [error_interrupt_entry],dword s4
@ -377,7 +336,9 @@ s4:
jmp change_task
s5:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x5
mov [error_interrupt_entry],dword s5
@ -390,7 +351,9 @@ s5:
jmp change_task
s6:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x6
mov [error_interrupt_entry],dword s6
@ -409,54 +372,45 @@ s6:
align 4
s7:
; <IP 05.02.2004>
cli
; </IP>
mov edi, 7*8
mov [edi+gdts+ tss0i +5], word 01010000b *256 +11101001b
clts
mov edi,[0x3000]
shl edi, 3
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
push eax
push ds es
mov ax, os_data
mov ds, ax
mov es, ax
; 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
mov eax, [prev_user_of_fpu]
shl eax, 8
add eax, 0x80000 + 0x10
fsave [eax]
; get base address of our TSS and...
mov esi,[0x3000]
imul esi,tss_step
add esi,tss_data
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
; ...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
pop es ds
pop eax
; then execute this task
mov ebx, [0x3000]
shl ebx,3
add ebx, tss0 ;t
mov [0xB004], bx
iret
jmp pword [0xB000]
iglobal
prev_user_of_fpu dd 1
endg
jmp s7
s8:
cli
add esp, 4 ; zero on the stack!
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x8
mov [error_interrupt_entry],dword s8
@ -469,7 +423,9 @@ s8:
jmp change_task
s9:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x9
mov [error_interrupt_entry],dword s9
@ -481,8 +437,12 @@ s9:
jmp change_task
; Invalid TSS
sa:
cli
add esp, 4 ; error code
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0xa
mov [error_interrupt_entry],dword sa
@ -494,8 +454,12 @@ sa:
jmp change_task
; Segment not present
sb:
cli
add esp, 4
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0xb
mov [error_interrupt_entry],dword sb
@ -507,8 +471,12 @@ sb:
jmp change_task
; Stack fault exception
sc:
cli
add esp, 4
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0xc
mov [error_interrupt_entry],dword sc
@ -520,8 +488,12 @@ sc:
jmp change_task
; General Protection Fault
sd:
cli
add esp, 4
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0xd
mov [error_interrupt_entry],dword sd
@ -533,8 +505,12 @@ sd:
jmp change_task
; Page-Fault Exception
se:
cli
add esp, 4
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0xe
mov [error_interrupt_entry],dword se
@ -546,8 +522,11 @@ se:
jmp change_task
; ??
sf:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0xf
mov [error_interrupt_entry],dword sf
@ -559,8 +538,11 @@ sf:
jmp change_task
; x87 FPU Floating-Point Error
s10:
cli
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x10
mov [error_interrupt_entry],dword s10
@ -572,8 +554,12 @@ s10:
jmp change_task
; Alignment Check Exception
s11:
cli
add esp, 4
mov ax, os_data
mov ds, ax
mov es, ax
mov [error_interrupt],0x11
mov [error_interrupt_entry],dword s11
@ -585,6 +571,9 @@ s11:
jmp change_task
writehex:
pusha
@ -679,46 +668,9 @@ show_error_parameters:
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
; irq1 -> hid/keyboard.inc
p_irq2:
@ -843,16 +795,23 @@ p_irq12:
jmp p_irq12
p_irq13:
irqD:
call restore_caller
mov edi,13
call irqhandler
mov dx,0xf0
mov al,0
out dx,al
mov dx,0xa0
mov al,0x20
out dx,al
mov dx,0x20
out dx,al
call return_to_caller
jmp p_irq13
jmp irqD
p_irq14:
@ -977,11 +936,9 @@ irqhandler:
ret
; this code should never get control!
; applications can use only 0x40 interrupt
; simply return control to interrupted process
unknown_interrupt:
@@: call change_task
jmp @b
iret
@ -1020,21 +977,6 @@ clear_application_table_status:
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:
@ -1121,10 +1063,7 @@ 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
@ -1132,8 +1071,6 @@ uglobal
app_i_param dd 0x0
app_i_icon dd 0x0
app_mem_pos dd 0x0
;thread_create dd 0x0
;gdt_place dd 0x0
appl_path dd 0x0
appl_path_size dd 0x0
endg
@ -1186,8 +1123,6 @@ terminate: ; terminate application
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
@ -1196,18 +1131,6 @@ terminate: ; terminate application
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
mov [usedi40+eax],byte 0
mov ecx,esi ; remove buttons
bnewba2:
@ -1398,8 +1321,7 @@ terminate: ; terminate application
popa
mov edi,esi ; do not run this process slot
shl edi, 5 ;imul edi,0x20
; add edi,0x3000
shl edi, 5
mov [edi+0x300A],byte 9
; call systest
sti ; .. and life goes on
@ -1443,12 +1365,6 @@ 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

86
kernel/trunk/core/syscall.inc
View File

@ -4,8 +4,9 @@
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
uglobal
task_tss rd 1
pushed_regs rd 1
endg
align 32
i40:
pushad
@ -14,45 +15,36 @@ i40:
mov ax,word os_data
mov ds,ax
mov es,ax
mov [task_tss],esp
add dword [task_tss],4
mov [pushed_regs],esp
add dword [pushed_regs],4
cli
mov edi,[0x3000]
mov eax,edi
shl edi, 3
;clear busy flag in application's TSS
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
shl edi,5
mov eax, [0x3000]
mov edi, eax
shl edi, 8
mov [edi+0x80000+0xB0],eax ; used i40 handler
; for syscall trace function
call save_registers
; mov esi, [0x3000]
; imul esi, tss_step
; add esi, tss_data
mov esi,[task_tss]
; sub esi,0x28
; esi holds address of TSS of interupted program
mov esi,[pushed_regs]
; load first 3 registers
mov eax,[esi+28];+l.eax-tss_sceleton]
mov ebx,[esi+16];l.ebx-tss_sceleton]
mov ecx,[esi+24];l.ecx-tss_sceleton]
mov eax,[esi+28]
mov ebx,[esi+16]
mov ecx,[esi+24]
; save current registers
; stack may be modified by a system function to return some value to caller!
pushad
; load all registers from TSS of the application, in crossed order (why?)
mov edi,[esi+28];l.eax-tss_sceleton]
mov eax,[esi+16];l.ebx-tss_sceleton]
mov ebx,[esi+24];l.ecx-tss_sceleton]
mov ecx,[esi+20];l.edx-tss_sceleton]
mov edx,[esi+4];l.esi-tss_sceleton]
mov esi,[esi+0];l.edi-tss_sceleton]
mov edi,[esi+28]
mov eax,[esi+16]
mov ebx,[esi+24]
mov ecx,[esi+20]
mov edx,[esi+4]
mov esi,[esi+0]
; enable interupts - a task switch or an IRQ _CAN_ interrupt i40 handler
sti
@ -66,16 +58,10 @@ i40:
; return saved and probably even changed regs
popad
; <Ivan 05.03.2005> esi already loaded - look above "pusha"
;mov esi,[0x3000]
;imul esi,tss_step
;add esi,tss_data
; </Ivan 05.03.2005>
; modify 3 program's registers (in its TSS)
mov [esi+28],eax;[esi+l.eax-tss_sceleton], eax
mov [esi+16],ebx;[esi+l.ebx-tss_sceleton], ebx
mov [esi+24],ecx;[esi+l.ecx-tss_sceleton], ecx
mov [esi+28],eax
mov [esi+16],ebx
mov [esi+24],ecx
xor eax, eax
mov edi, [0x3000] ; no syscall interrupt in use anymore
@ -89,36 +75,11 @@ i40:
popad
iretd
jmp i40
label reg1 dword at 0x6000
label reg2 dword at 0x6400
label usedi40 byte at 0x6800
uglobal
schd dd 0x0
endg
align 4
save_registers:
mov esi,[0x3000]
imul esi,tss_step
add esi,tss_data
mov eax,[esi+l.eax-tss_sceleton]
mov ebx,[esi+l.ebx-tss_sceleton]
mov ecx,[esi+l.ecx-tss_sceleton]
mov edx,[esi+l.edx-tss_sceleton]
mov edi,[esi+l.edi-tss_sceleton]
mov ebp,[esi+l.ebp-tss_sceleton]
mov esi,[esi+l.esi-tss_sceleton]
push eax ecx esi edi
mov esi, [0x3010]
mov eax,[esi+0x4]
mov esi,esp
mov eax, [esi+0x4] ; load PID
mov esi, [pushed_regs]
inc [save_syscall_count]
mov edi,[save_syscall_count]
and edi,0xF
@ -128,7 +89,6 @@ save_registers:
mov ecx,32 / 4
cld
rep movsd
pop edi esi ecx eax
ret
uglobal

1
kernel/trunk/kernel32.inc
View File

@ -34,7 +34,6 @@ ends fix } struct_helper name@struct
include "core/sync.inc"
include "core/sys32.inc" ; process management
include "core/sched.inc" ; process scheduling
include "core/fpu.inc" ; FPU handler
include "core/syscall.inc" ; system call
include "core/mem.inc" ; high-level memory management
include "core/newproce.inc" ;new process management

24
kernel/trunk/memmap.inc
View File

@ -51,12 +51,10 @@
;
;!!!
; 5000 -> 5FFF save_syscall_data - syscall trace
; 6000 -> 63FF reg1 array - for i40 (first parts of saved TSS descriptor)
; 6400 -> 67FF reg2 array - same thing, second part
; 6800 -> 68FF used i40 (1 if used, 0 if free), first element not used
; 6000 -> 68FF free
; 6900 -> 6EFF saved picture under mouse pointer
;
; 6F00 -> 7FFF i38 stack (4,25Kb)
; 6F00 -> 7FFF free
;
; 8000 -> A3FF used FLOPPY driver
;
@ -65,11 +63,10 @@
; B000 -> B005 jump address for irq0 (task switch)
; B008 -> B00B count of ticks remaining to updating CPU usage info
;
; B060 -> B07F fpu error handler's stack
; B080 -> B0FF fpu_tss -> temporary TSS for FPU context switching
; B060 -> B0FF free
; B100 -> B2FF IDT
; B300 -> BAFF tasknum array - for i40 handler
; BB00 -> BEFF free
; B300 -> BEFF free
;!!!
; BF00 -> BFFF bytes, 1 if process running/memory in use
@ -137,9 +134,9 @@
; 30000 -> 36FFF basic text font II
; 37000 -> 3BFFF basic text font I
; 40000 -> 4FFFF data of retrieved disks and partitions (Mario79)
; 50000 -> 500FF TSS of scheduler
; 50000 -> 500FF free
; 51000 -> 54000 esp0,esp1,esp2
; 5F000 -> 5FFFF schedulers stack
; 5F000 -> 5FFFF free
; 60000 -> 7FFFF paging tables
; 80000 -> 8FFFF additional app info, in 256 byte steps - 256 entries
;
@ -171,7 +168,7 @@
; 284000 -> 28FFFF free
;
; 290000 -> 297FFF TSS's of interrupts
; 298000 -> 29FFFF TSS's of SYSTEM interrupts - 256 entries
; 298000 -> 29FFFF free
; 2A0000 -> 2B00ff wav device data
; 2C0000 -> 2C3fff button info
;
@ -213,7 +210,6 @@
;
; 800000 -> BFFFFF mapped to LFB
;
; C00000 -> DFFFFF * Application information
;
; C00000 -> C01FFF draw_data - 256 entries
;
@ -227,8 +223,8 @@
; - system interrupt stacks
; - 256 entries * 4096 step
;
; D20000 -> DA8000 TSS and IO map for (2048*8)=16384 ports
; (128+2048)*256 = 557956 = 0x88000
; D20000 -> F28000 TSS and IO map for (8192*8)=65536 ports
; (128+8192)*256 = 557956 = 0x88000
;
; 1000000 -> 3FFFFFF for applications
;