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V86 improvements

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git-svn-id: svn://kolibrios.org@770 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Evgeny Grechnikov (Diamond) 2008-03-15 19:30:34 +00:00
parent 07985443ea
commit b9e5a9d227
2 changed files with 71 additions and 1 deletions
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3
kernel/trunk/blkdev/hd_drv.inc
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@ -910,7 +910,8 @@ int13_call:
popad
@@:
mov word [ebx+v86_regs.esi], 510h
mov word [ebx+v86_regs.esp], 900h
mov word [ebx+v86_regs.ss], 9000h
mov word [ebx+v86_regs.esp], 0C000h
mov word [ebx+v86_regs.eip], 500h
mov [ebx+v86_regs.eflags], 20200h
mov esi, [sys_v86_machine]

69
kernel/trunk/core/v86.inc
View File

@ -216,6 +216,8 @@ init_sys_v86:
mov byte [BOOT_VAR + 0x505], 0xF4
mov esi, eax
mov ebx, [eax+V86_machine.pagedir]
mov dword [ebx+0x9B*4+0x1000], 0x9B000 or 111b
mov dword [ebx+0x9B*4+0x1800], OS_BASE + 0x9B000
mov dword [ebx+0x9C*4+0x1000], 0x9C000 or 111b
mov dword [ebx+0x9C*4+0x1800], OS_BASE + 0x9C000
mov dword [ebx+0x9D*4+0x1000], 0x9D000 or 111b
@ -549,6 +551,38 @@ v86_exc_c:
inc word [esp+v86_regs.eip]
popad
iretd
.handle_pushfd:
cmp word [esp+v86_regs.esp], 4
jae @f
mov bl, 12 ; #SS exception
jmp .nogp
@@:
movzx edx, word [esp+v86_regs.ss]
shl edx, 4
movzx eax, word [esp+v86_regs.esp]
sub eax, 4
add edx, eax
mov eax, edx
mov esi, [esp+v86_regs.size+10h+4]
call v86_get_lin_addr
cmp eax, 0x1000
jae @f
mov bl, 14 ; #PF exception
jmp .nogp
@@:
lea eax, [edx+3]
call v86_get_lin_addr
cmp eax, 0x1000
jae @f
mov bl, 14 ; #PF exception
jmp .nogp
@@:
sub word [esp+v86_regs.esp], 4
movzx eax, word [esp+v86_regs.eflags]
mov [edx], eax
add word [esp+v86_regs.eip], 2
popad
iretd
.handle_popf:
cmp word [esp+v86_regs.esp], 0xFFFF
jnz @f
@ -580,6 +614,37 @@ v86_exc_c:
inc word [esp+v86_regs.eip]
popad
iretd
.handle_popfd:
cmp word [esp+v86_regs.esp], 0x10000 - 4
jbe @f
mov bl, 12
jmp .nogp
@@:
movzx edx, word [esp+v86_regs.ss]
shl edx, 4
movzx eax, word [esp+v86_regs.esp]
add edx, eax
mov eax, edx
mov esi, [esp+v86_regs.size+10h+4]
call v86_get_lin_addr
cmp eax, 0x1000
jae @f
mov bl, 14
jmp .nogp
@@:
lea eax, [edx+3]
call v86_get_lin_addr
cmp eax, 0x1000
jae @f
mov bl, 14
jmp .nogp
@@:
mov eax, [edx]
mov word [esp+v86_regs.eflags], ax
add word [esp+v86_regs.esp], 4
add word [esp+v86_regs.eip], 2
popad
iretd
.handle_cli:
and byte [esp+v86_regs.eflags+1], not 2
inc word [esp+v86_regs.eip]
@ -616,6 +681,10 @@ v86_exc_c:
cmp word [esp+v86_regs.eip], 0xFFFF
jae .nogp
lodsb
cmp al, 0x9C
jz .handle_pushfd
cmp al, 0x9D
jz .handle_popfd
cmp al, 0xEF
jz .handle_out_dword
cmp al, 0xED