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805 lines (635 loc) · 16.2 KB
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;%define _KERNEL_CS 0x8
;%define _KERNEL_DS 0x10
;%define _USER_CS 0x18
;%define _USER_DS 0x20
;;;kernel.hと必ず同期を取ること(^_^;
%define _KERNEL_CS 0x30
%define _KERNEL_DS 0x38
%define _USER_CS 0x40
%define _USER_DS 0x48
%define _TSS_BASE_ESP 0x80000
%define _TSS_SS _KERNEL_DS
[section .text]
;マクロで何とかできん！？汚すぎ...
global _sys_intrruptIRQ0
global _sys_intrruptIRQ1
global _sys_intrruptIRQ2
global _sys_intrruptIRQ3
global _sys_intrruptIRQ4
global _sys_intrruptIRQ5
global _sys_intrruptIRQ6
global _sys_intrruptIRQ7
global _sys_intrruptIRQ8
global _sys_intrruptIRQ9
global _sys_intrruptIRQ10
global _sys_intrruptIRQ11
global _sys_intrruptIRQ12
global _sys_intrruptIRQ13
global _sys_intrruptIRQ14
global _sys_intrruptIRQ15
global _sys_8086_to_protect
;割り込み一覧
global _sys_ignore_int
global _sys_simd_float_error
global _sys_machine_check_error
global _sys_alignment_check_error
global _sys_floating_point_error
global _sys_page_fault
global _sys_stack_exception
global _sys_seg_not_present
global _sys_invalid_tss
global _sys_cop_seg_overflow
global _sys_double_fault
global _sys_device_not_available
global _sys_invalid_opcode
global _sys_bound_fault
global _sys_overflow_fault
global _sys_break_point
global _sys_nmi_fault
global _sys_debug_fault
global _sys_divide_error_fault
global _sys_general_protection
global _general_iret
global _sys_sysenter_trampoline
;本体はidt.cにあるよ
extern _sys_printk
extern _sys_printf
extern _IRQ_handler
extern _do_BIOS_emu
;;; in CPUemu.c
extern _wrap_protect_mode
extern _wrap_real_mode
extern _debug_break_point
;;;本体はdebug.c
extern _sys_dump_cpu
;;;本体はinterrupt.emu.c
extern _sys_wrap_divide_error_fault
extern _sys_wrap_debug_fault
extern _sys_wrap_nmi_fault
extern _sys_wrap_break_point
extern _sys_wrap_overflow_fault
extern _sys_wrap_bound_fault
extern _sys_wrap_invalid_opcode
extern _sys_wrap_device_not_available
extern _sys_wrap_double_fault
extern _sys_wrap_cop_seg_overflow
extern _sys_wrap_invalid_tss
extern _sys_wrap_seg_not_present
extern _sys_wrap_stack_exception
extern _sys_wrap_general_protection
extern _sys_wrap_page_fault
extern _sys_wrap_floating_point_error
extern _sys_wrap_alignment_check_error
extern _sys_wrap_machine_check_error
extern _sys_wrap_simd_float_error
extern _sys_wrap_ignore_int
;;; 本体はmisc.cの中
extern _sysenter_callbackhandler
extern __exit_fromsysenter
extern __exit_fratsegment
%macro push_stack 0
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
%endmacro
%macro pop_stack 0
pop ebx
pop ecx
pop edx
pop esi
pop edi
pop ebp
pop eax
pop ds
pop es
%endmacro
%macro ig_int 1
global _sys_ignore_trampoline_%1
_sys_ignore_trampoline_%1:
push dword %1
jmp _sys_ignore_int
%endmacro
;256個のidtハンドラ
%assign i 0
%rep 256
ig_int i
%assign i i+1
%endrep
;だせぇコード...マクロで書き換えられないかしら...
_sys_intrruptIRQ0:
push dword 0x0
jmp _common_intr_handle
_sys_intrruptIRQ1:
push dword 0x1
jmp _common_intr_handle
_sys_intrruptIRQ2:
push dword 0x2
jmp _common_intr_handle
_sys_intrruptIRQ3:
push dword 0x3
jmp _common_intr_handle
_sys_intrruptIRQ4:
push dword 0x4
jmp _common_intr_handle
_sys_intrruptIRQ5:
push dword 0x5
jmp _common_intr_handle
_sys_intrruptIRQ6:
push dword 0x6
jmp _common_intr_handle
_sys_intrruptIRQ7:
push dword 0x7
jmp _common_intr_handle
_sys_intrruptIRQ8:
push dword 0x8
jmp _common_intr_handle
_sys_intrruptIRQ9:
push dword 0x9
jmp _common_intr_handle
_sys_intrruptIRQ10:
push dword 0xA
jmp _common_intr_handle
_sys_intrruptIRQ11:
push dword 0xB
jmp _common_intr_handle
_sys_intrruptIRQ12:
push dword 0xC
jmp _common_intr_handle
_sys_intrruptIRQ13:
push dword 0xD
jmp _common_intr_handle
_sys_intrruptIRQ14:
push dword 0xE
jmp _common_intr_handle
_sys_intrruptIRQ15:
push dword 0xF
jmp _common_intr_handle
_common_intr_handle:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
;IRQ用の呼び出しハンドラ
call _IRQ_handler
jmp _general_iret
_push_stacks:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
mov eax, esp
add eax, 0x24
call [ss:eax]
jmp _general_iret
;GuestOSがプロテクトモード時の場合
protect_mode_emu:
call _wrap_protect_mode ;命令を調べる
jmp _rebuild_stack ;eax分だけ、EIPを進める
check_cmd_type:
mov ebp, esp
add ebp, 0x28
mov eax, [ss:ebp] ;eaxにEIPレジスタが入った
add ebp, 0x4
mov ebx, [ss:ebp] ;CSレジスタをeaxに
shl ebx, 4
add eax, ebx ;これでリニアアドレス生成
mov ebx, _USER_DS
mov gs, ebx ;V8086mode時のエミュセグメント
;命令の内容退避
xor ecx, ecx
mov cx, [gs:eax]
cmp cl, 0xCD ;int命令かどうかを確認
jne _chk_another_cpu_cmd
shr ecx, 8
push ecx
call _do_BIOS_emu
add esp, 0x4
mov eax, 0x2 ;int命令分(2byte)
;eax分だけ、retポインタを進める
_rebuild_stack:
mov ebp, esp
add ebp, 0x28
mov ebx, [ss:ebp]
add ebx, eax ;EIPをeaxの数値分だけ進める
mov [ss:ebp], ebx
jmp _general_iret
_chk_another_cpu_cmd:
;realモードだけどint命令じゃない
call _wrap_real_mode
cmp eax, 0x0
jne _rebuild_stack
jmp no_emulation
_sys_sysenter_trampoline:
jmp _KERNEL_CS:__exit_fratsegment
_sysenter_code_chunk:
jmp 0xa8:__exit_fromsysenter
_sys_divide_error_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_divide_error_fault
jmp _general_iret_no_err_code
_sys_debug_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
;call _sys_wrap_debug_fault
call _debug_break_point
jmp _general_iret_no_err_code
_sys_nmi_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_nmi_fault
jmp _general_iret_no_err_code
_sys_break_point:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
;call _sys_wrap_break_point
call _debug_break_point
jmp _general_iret_no_err_code
_sys_overflow_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_overflow_fault
jmp _general_iret_no_err_code
_sys_bound_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_bound_fault
jmp _general_iret_no_err_code
_sys_invalid_opcode:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_invalid_opcode
jmp _general_iret_no_err_code
_sys_device_not_available:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_device_not_available
jmp _general_iret_no_err_code
_sys_double_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_double_fault
jmp _general_iret
_sys_cop_seg_overflow:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_cop_seg_overflow
jmp _general_iret_no_err_code
_sys_invalid_tss:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_invalid_tss
jmp _general_iret
_sys_seg_not_present:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_seg_not_present
jmp _general_iret
_sys_stack_exception:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_stack_exception
jmp _general_iret
_sys_page_fault:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_page_fault
jmp _general_iret
_sys_floating_point_error:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_floating_point_error
jmp _general_iret_no_err_code
_sys_alignment_check_error:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_alignment_check_error
jmp _general_iret
_sys_machine_check_error:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_machine_check_error
jmp _general_iret_no_err_code
_sys_simd_float_error:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_simd_float_error
jmp _general_iret_no_err_code
;なにこの割り込みふざけてるの？
_sys_ignore_int:
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
call _sys_wrap_ignore_int
jmp _general_iret
_sys_general_protection:
;V8086modeかどうかを調べる
cld
push es
push ds
push eax
push ebp
push edi
push esi
push edx
push ecx
push ebx
mov eax, _KERNEL_DS
mov ds, eax
mov es, eax
;未来の俺へ
;このやり方は馬鹿みたい、スタックにプッシュされたEFLAGSレジスタのVMビットを
;調べりゃVMモードかどうかはすぐ分かる、書き直せ！
mov ecx, esp
add ecx, 0x30
mov eax, [ss:ecx]
and eax, 0x20000
cmp eax, 0x20000
jz check_cmd_type ;v8086ですね
jne protect_mode_emu ;v8086じゃない(realmodeじゃない)
;これが呼び出されたということは、チョイおかしなことが事が起こってる
no_emulation:
;マーク
;push general_protection_msg
;call _sys_printf
;add esp, 0x4
jmp no_emulation
_general_iret:
pop ebx
pop ecx
pop edx
pop esi
pop edi
pop ebp
pop eax
pop ds
pop es
add esp, 0x4 ;エラーコード破棄
iret
_general_iret_no_err_code:
pop ebx
pop ecx
pop edx
pop esi
pop edi
pop ebp
pop eax
pop ds
pop es
iret
_stop:
jmp _stop
;extern void _sys_8086_to_protect(DWORD new_eip, DWORD new_cs, DWORD eflags, DWORD esp, DWORD ss);
_sys_8086_to_protect:
;param退避
pop eax
pop eax ;new_eip
pop ebx ;new_cs
pop ecx ;eflags
pop ebp ;esp
pop esi ;ss
;stack完全破壊
mov esp, _TSS_BASE_ESP
;stackを作り直す
push esi ;ss
push ebp ;esp
;vm-flag解除
and ecx, 0xfffd7fd7
push ecx ;eflags
push ebx
push eax
;これでプロテクトモードへ移行する(v8086解除)
iret