| 14,18 → 14,18 |
|---|
| mov ecx, 0x40 |
| mov eax, (10001110b shl 24) + os_code |
| @@: |
| movsw ;low word of code-entry |
| stosd ;interrupt gate type : os_code selector |
| movsw ;high word of code-entry |
| movsw ; low word of code-entry |
| stosd ; interrupt gate type : os_code selector |
| movsw ; high word of code-entry |
| loop @b |
| movsd ;copy low dword of trap gate for int 0x40 |
| movsd ;copy high dword of trap gate for int 0x40 |
| movsd ; copy low dword of trap gate for int 0x40 |
| movsd ; copy high dword of trap gate for int 0x40 |
| mov ecx, 23 |
| mov eax, (10001110b shl 24) + os_code |
| @@: |
| movsw ;low word of code-entry |
| stosd ;interrupt gate type : os_code selector |
| movsw ;high word of code-entry |
| movsw ; low word of code-entry |
| stosd ; interrupt gate type : os_code selector |
| movsw ; high word of code-entry |
| loop @b |
| lidt [esi] |
| ret |
| 33,13 → 33,13 |
|---|
| iglobal |
| align 4 |
| sys_int: |
| ;exception handlers addresses (for interrupt gate construction) |
| ; exception handlers addresses (for interrupt gate construction) |
| dd e0,e1,e2,e3,e4,e5,e6,except_7 ; SEE: core/fpu.inc |
| dd e8,e9,e10,e11,e12,e13,page_fault_exc,e15 |
| dd e16, e17,e18, e19 |
| times 12 dd unknown_interrupt ;int_20..int_31 |
| |
| ;interrupt handlers addresses (for interrupt gate construction) |
| ; interrupt handlers addresses (for interrupt gate construction) |
| ; 0x20+ are IRQ handlers |
| dd irq0 |
| rept 12 irqn:1 \{dd irq_serv.irq_\#irqn\} |
| 53,8 → 53,8 |
|---|
| |
| idtreg: ; data for LIDT instruction (!!! must be immediately below sys_int data) |
| dw 2*($-sys_int-4)-1 |
| dd idts ;0x8000B100 |
| dw 0 ;alignment |
| dd idts ; 0x8000B100 |
| dw 0 ; alignment |
| |
| msg_fault_sel dd msg_exc_8,msg_exc_u,msg_exc_a,msg_exc_b |
| dd msg_exc_c,msg_exc_d,msg_exc_e,msg_exc_u |
| 104,19 → 104,19 |
|---|
| pf_err_code dd ? |
| endg |
| |
| page_fault_exc: ; дуракоусточивость: селекторы испорчены... |
| pop [ss:pf_err_code]; действительно до следующего #PF |
| page_fault_exc: ; foolproof: selectors are clobbered ... |
| pop [ss:pf_err_code] ; actually, until the next #PF |
| save_ring3_context |
| mov bl, 14 |
| |
| exc_c: ; исключения (все, кроме 7-го - #NM) |
| ; Фрэйм стека при исключении/прерывании из 3-го кольца + pushad (т.е., именно здесь) |
| exc_c: ; exceptions (all but 7th - #NM) |
| ; stack frame when exception/interrupt from ring3 + pushad (i.e right here) |
| reg_ss equ esp+0x30 |
| reg_esp3 equ esp+0x2C |
| reg_eflags equ esp+0x28 |
| reg_cs3 equ esp+0x24 |
| reg_eip equ esp+0x20 |
| ; это фрэйм от pushad |
| ; this if frame from pushad |
| reg_eax equ esp+0x1C |
| reg_ecx equ esp+0x18 |
| reg_edx equ esp+0x14 |
| 126,15 → 126,15 |
|---|
| reg_esi equ esp+0x04 |
| reg_edi equ esp+0x00 |
| |
| mov ax, app_data ;исключение |
| mov ds, ax ;загрузим правильные значения |
| mov es, ax ;в регистры |
| cld ; и приводим DF к стандарту |
| mov ax, app_data ; exception |
| mov ds, ax ; load proper values |
| mov es, ax ; to registers |
| cld ; clear the destination flag |
| movzx ebx, bl |
| ; redirect to V86 manager? (EFLAGS & 0x20000) != 0? |
| test byte[reg_eflags+2], 2 |
| jnz v86_exc_c |
| cmp bl, 14 ; #PF |
| cmp bl, 14 ; #PF |
| jne @f |
| call page_fault_handler ; SEE: core/memory.inc |
| @@: |
| 303,12 → 303,12 |
|---|
| shr ecx, 10 |
| mov edx, [master_tab+ecx*4] |
| test edx, PG_READ |
| jz .fail ;page table is not created |
| ;incorrect address in the program |
| jz .fail ; page table is not created |
| ; incorrect address in the program |
| |
| mov eax, [page_tabs+ebx*4] |
| test eax, 2 |
| jz .fail ;address not reserved for use. error |
| jz .fail ; address not reserved for use. error |
| |
| pop ebx |
| xor eax, eax |
| 365,17 → 365,15 |
|---|
| |
| ret |
| |
| ; * eax = 64 - номер функции |
| ; * ebx = 1 - единственная подфункция |
| ; * ecx = новый размер памяти |
| ;Возвращаемое значение: |
| ; * eax = 0 - успешно |
| ; * eax = 1 - недостаточно памяти |
| |
| ; sysfn 64 implementation |
| align 4 |
| sys_resize_app_memory: |
| ; ebx = 1 - resize |
| ; ecx = new amount of memory |
| ; in: eax = 64 - function number |
| ; ebx = 1 - number of its only subfunction |
| ; ecx = new amount of memory |
| ; out: |
| ; eax = 0 - success |
| ; eax = 1 - out of memory |
| |
| ; cmp eax,1 |
| dec ebx |
| 446,7 → 444,7 |
|---|
| mov ecx, [esi+8] |
| mov [eax+SLOT_BASE+APPDATA.io_map+4], ecx |
| .nov86: |
| ;destroy per-thread kernel objects |
| ; destroy per-thread kernel objects |
| mov esi, [.slot] |
| shl esi, 8 |
| add esi, SLOT_BASE+APP_OBJ_OFFSET |