;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 4424 $
align 4
proc alloc_page
pushfd
cli
push ebx
;//-
cmp [pg_data.pages_free], 1
jle .out_of_memory
;//-
mov ebx, [page_start]
mov ecx, [page_end]
.l1:
bsf eax, [ebx];
jnz .found
add ebx, 4
cmp ebx, ecx
jb .l1
pop ebx
popfd
xor eax, eax
ret
.found:
;//-
dec [pg_data.pages_free]
jz .out_of_memory
;//-
btr [ebx], eax
mov [page_start], ebx
sub ebx, sys_pgmap
lea eax, [eax+ebx*8]
shl eax, 12
;//- dec [pg_data.pages_free]
pop ebx
popfd
ret
;//-
.out_of_memory:
mov [pg_data.pages_free], 1
xor eax, eax
pop ebx
popfd
ret
;//-
endp
align 4
proc alloc_pages stdcall, count:dword
pushfd
push ebx
push edi
cli
mov eax, [count]
add eax, 7
shr eax, 3
mov [count], eax
;//-
mov ebx, [pg_data.pages_free]
sub ebx, 9
js .out_of_memory
shr ebx, 3
cmp eax, ebx
jg .out_of_memory
;//-
mov ecx, [page_start]
mov ebx, [page_end]
.find:
mov edx, [count]
mov edi, ecx
.match:
cmp byte [ecx], 0xFF
jne .next
dec edx
jz .ok
inc ecx
cmp ecx, ebx
jb .match
.out_of_memory:
.fail:
xor eax, eax
pop edi
pop ebx
popfd
ret
.next:
inc ecx
cmp ecx, ebx
jb .find
pop edi
pop ebx
popfd
xor eax, eax
ret
.ok:
sub ecx, edi
inc ecx
push esi
mov esi, edi
xor eax, eax
rep stosb
sub esi, sys_pgmap
shl esi, 3+12
mov eax, esi
mov ebx, [count]
shl ebx, 3
sub [pg_data.pages_free], ebx
pop esi
pop edi
pop ebx
popfd
ret
endp
align 4
;proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword
map_page:
push ebx
mov eax, [esp+12] ; phis_addr
and eax, not 0xFFF
or eax, [esp+16] ; flags
mov ebx, [esp+8] ; lin_addr
shr ebx, 12
mov [page_tabs+ebx*4], eax
mov eax, [esp+8] ; lin_addr
pop ebx
invlpg [eax]
ret 12
align 4
map_space: ;not implemented
ret
align 4
proc free_page
;arg: eax page address
pushfd
cli
shr eax, 12 ;page index
bts dword [sys_pgmap], eax ;that's all!
cmc
adc [pg_data.pages_free], 0
shr eax, 3
and eax, not 3 ;dword offset from page_map
add eax, sys_pgmap
cmp [page_start], eax
ja @f
popfd
ret
@@:
mov [page_start], eax
popfd
ret
endp
align 4
proc map_io_mem stdcall, base:dword, size:dword, flags:dword
push ebx
push edi
mov eax, [size]
add eax, [base]
add eax, 4095
and eax, -4096
mov ecx, [base]
and ecx, -4096
sub eax, ecx
mov [size], eax
stdcall alloc_kernel_space, eax
test eax, eax
jz .fail
push eax
mov edi, 0x1000
mov ebx, eax
mov ecx, [size]
mov edx, [base]
shr eax, 12
shr ecx, 12
and edx, -4096
or edx, [flags]
@@:
mov [page_tabs+eax*4], edx
invlpg [ebx]
inc eax
add ebx, edi
add edx, edi
loop @B
pop eax
mov edx, [base]
and edx, 4095
add eax, edx
.fail:
pop edi
pop ebx
ret
endp
; param
; eax= page base + page flags
; ebx= linear address
; ecx= count
align 4
commit_pages:
test ecx, ecx
jz .fail
push edi
push eax
push ecx
mov ecx, pg_data.mutex
call mutex_lock
pop ecx
pop eax
mov edi, ebx
shr edi, 12
lea edi, [page_tabs+edi*4]
@@:
stosd
invlpg [ebx]
add eax, 0x1000
add ebx, 0x1000
loop @B
pop edi
mov ecx, pg_data.mutex
call mutex_unlock
.fail:
ret
; param
; eax= base
; ecx= count
align 4
release_pages:
push ebp
push esi
push edi
push ebx
mov esi, eax
mov edi, eax
shr esi, 12
lea esi, [page_tabs+esi*4]
push ecx
mov ecx, pg_data.mutex
call mutex_lock
pop ecx
mov ebp, [pg_data.pages_free]
mov ebx, [page_start]
mov edx, sys_pgmap
@@:
xor eax, eax
xchg eax, [esi]
invlpg [edi]
test eax, 1
jz .next
shr eax, 12
bts [edx], eax
cmc
adc ebp, 0
shr eax, 3
and eax, -4
add eax, edx
cmp eax, ebx
jae .next
mov ebx, eax
.next:
add edi, 0x1000
add esi, 4
loop @B
mov [pg_data.pages_free], ebp
mov ecx, pg_data.mutex
call mutex_unlock
pop ebx
pop edi
pop esi
pop ebp
ret
; param
; eax= base
; ecx= count
align 4
unmap_pages:
push edi
mov edi, eax
mov edx, eax
shr edi, 10
add edi, page_tabs
xor eax, eax
@@:
stosd
invlpg [edx]
add edx, 0x1000
loop @b
pop edi
ret
align 4
proc map_page_table stdcall, lin_addr:dword, phis_addr:dword
push ebx
mov ebx, [lin_addr]
shr ebx, 22
mov eax, [phis_addr]
and eax, not 0xFFF
or eax, PG_UW ;+PG_NOCACHE
mov dword [master_tab+ebx*4], eax
mov eax, [lin_addr]
shr eax, 10
add eax, page_tabs
invlpg [eax]
pop ebx
ret
endp
align 4
proc init_LFB
locals
pg_count dd ?
endl
cmp dword [LFBAddress], -1
jne @f
mov [BOOT_VARS+BOOT_MTRR], byte 2
; max VGA=640*480*4=1228800 bytes
; + 32*640*4=81920 bytes for mouse pointer
stdcall alloc_pages, ((1228800+81920)/4096)
push eax
call alloc_page
stdcall map_page_table, LFB_BASE, eax
pop eax
or eax, PG_UW
mov ebx, LFB_BASE
; max VGA=640*480*4=1228800 bytes
; + 32*640*4=81920 bytes for mouse pointer
mov ecx, (1228800+81920)/4096
call commit_pages
mov [LFBAddress], dword LFB_BASE
ret
@@:
test [SCR_MODE], word 0100000000000000b
jnz @f
mov [BOOT_VARS+BOOT_MTRR], byte 2
ret
@@:
call init_mtrr
mov edx, LFB_BASE
mov esi, [LFBAddress]
mov edi, 0x00C00000
mov dword [exp_lfb+4], edx
shr edi, 12
mov [pg_count], edi
shr edi, 10
bt [cpu_caps], CAPS_PSE
jnc .map_page_tables
or esi, PG_LARGE+PG_UW
mov edx, sys_proc+PROC.pdt_0+(LFB_BASE shr 20)
@@:
mov [edx], esi
add edx, 4
add esi, 0x00400000
dec edi
jnz @B
bt [cpu_caps], CAPS_PGE
jnc @F
or dword [sys_proc+PROC.pdt_0+(LFB_BASE shr 20)], PG_GLOBAL
@@:
mov dword [LFBAddress], LFB_BASE
mov eax, cr3 ;flush TLB
mov cr3, eax
ret
.map_page_tables:
@@:
call alloc_page
stdcall map_page_table, edx, eax
add edx, 0x00400000
dec edi
jnz @B
mov eax, [LFBAddress]
mov edi, page_tabs + (LFB_BASE shr 10)
or eax, PG_UW
mov ecx, [pg_count]
cld
@@:
stosd
add eax, 0x1000
dec ecx
jnz @B
mov dword [LFBAddress], LFB_BASE
mov eax, cr3 ;flush TLB
mov cr3, eax
ret
endp
align 4
proc new_mem_resize stdcall, new_size:dword
push ebx
push esi
push edi
mov edx, [current_slot]
cmp [edx+APPDATA.heap_base], 0
jne .exit
mov edi, [new_size]
add edi, 4095
and edi, not 4095
mov [new_size], edi
mov esi, [edx+APPDATA.mem_size]
add esi, 4095
and esi, not 4095
cmp edi, esi
ja .expand
je .exit
mov ebx, edi
shr edi, 12
shr esi, 12
mov ecx, pg_data.mutex
call mutex_lock
@@:
mov eax, [app_page_tabs+edi*4]
test eax, 1
jz .next
mov dword [app_page_tabs+edi*4], 0
invlpg [ebx]
call free_page
.next:
inc edi
add ebx, 0x1000
cmp edi, esi
jb @B
mov ecx, pg_data.mutex
call mutex_unlock
.update_size:
mov edx, [current_slot]
mov ebx, [new_size]
call update_mem_size
.exit:
pop edi
pop esi
pop ebx
xor eax, eax
ret
.expand:
mov ecx, pg_data.mutex
call mutex_lock
xchg esi, edi
push esi ;new size
push edi ;old size
add edi, 0x3FFFFF
and edi, not(0x3FFFFF)
add esi, 0x3FFFFF
and esi, not(0x3FFFFF)
cmp edi, esi
jae .grow
@@:
call alloc_page
test eax, eax
jz .exit_fail
stdcall map_page_table, edi, eax
push edi
shr edi, 10
add edi, page_tabs
mov ecx, 1024
xor eax, eax
cld
rep stosd
pop edi
add edi, 0x00400000
cmp edi, esi
jb @B
.grow:
pop edi ;old size
pop ecx ;new size
shr edi, 10
shr ecx, 10
sub ecx, edi
shr ecx, 2 ;pages count
mov eax, 2
add edi, app_page_tabs
rep stosd
mov ecx, pg_data.mutex
call mutex_unlock
jmp .update_size
.exit_fail:
mov ecx, pg_data.mutex
call mutex_unlock
add esp, 8
pop edi
pop esi
pop ebx
xor eax, eax
inc eax
ret
endp
align 4
update_mem_size:
; in: edx = slot base
; ebx = new memory size
; destroys eax,ecx,edx
mov [APPDATA.mem_size+edx], ebx
;search threads and update
;application memory size infomation
mov ecx, [APPDATA.process+edx]
mov eax, 2
.search_threads:
;eax = current slot
;ebx = new memory size
;ecx = page directory
cmp eax, [TASK_COUNT]
jg .search_threads_end
mov edx, eax
shl edx, 5
cmp word [CURRENT_TASK+edx+TASKDATA.state], 9 ;if slot empty?
jz .search_threads_next
shl edx, 3
cmp [SLOT_BASE+edx+APPDATA.process], ecx ;if it is our thread?
jnz .search_threads_next
mov [SLOT_BASE+edx+APPDATA.mem_size], ebx ;update memory size
.search_threads_next:
inc eax
jmp .search_threads
.search_threads_end:
ret
; param
; eax= linear address
;
; retval
; eax= phisical page address
align 4
get_pg_addr:
sub eax, OS_BASE
cmp eax, 0x400000
jb @f
shr eax, 12
mov eax, [page_tabs+(eax+(OS_BASE shr 12))*4]
@@:
and eax, 0xFFFFF000
ret
align 4
; Now it is called from core/sys32::exc_c (see stack frame there)
proc page_fault_handler
.err_addr equ ebp-4
push ebx ;save exception number (#PF)
mov ebp, esp
mov ebx, cr2
push ebx ;that is locals: .err_addr = cr2
inc [pg_data.pages_faults]
mov eax, [pf_err_code]
cmp ebx, OS_BASE ;ebx == .err_addr
jb .user_space ;страница в памяти приложения ;
cmp ebx, page_tabs
jb .kernel_space ;страница в памяти ядра
cmp ebx, kernel_tabs
jb .alloc;.app_tabs ;таблицы страниц приложения ;
;просто создадим одну
if 0 ;пока это просто лишнее
cmp ebx, LFB_BASE
jb .core_tabs ;таблицы страниц ядра
;Ошибка
.lfb:
;область LFB
;Ошибка
jmp .fail
end if
.core_tabs:
.fail: ;simply return to caller
mov esp, ebp
pop ebx ;restore exception number (#PF)
ret
; xchg bx, bx
; add esp,12 ;clear in stack: locals(.err_addr) + #PF + ret_to_caller
; restore_ring3_context
; iretd
.user_space:
test eax, PG_MAP
jnz .err_access ;Страница присутствует
;Ошибка доступа ?
shr ebx, 12
mov ecx, ebx
shr ecx, 10
mov edx, [master_tab+ecx*4]
test edx, PG_MAP
jz .fail ;таблица страниц не создана
;неверный адрес в программе
mov eax, [page_tabs+ebx*4]
test eax, 2
jz .fail ;адрес не зарезервирован для ;
;использования. Ошибка
.alloc:
call alloc_page
test eax, eax
jz .fail
stdcall map_page, [.err_addr], eax, PG_UW
mov edi, [.err_addr]
and edi, 0xFFFFF000
mov ecx, 1024
xor eax, eax
;cld ;caller is duty for this
rep stosd
.exit: ;iret with repeat fault instruction
add esp, 12;clear in stack: locals(.err_addr) + #PF + ret_to_caller
restore_ring3_context
iretd
.err_access:
; access denied? this may be a result of copy-on-write protection for DLL
; check list of HDLLs
and ebx, not 0xFFF
mov eax, [CURRENT_TASK]
shl eax, 8
mov eax, [SLOT_BASE+eax+APPDATA.dlls_list_ptr]
test eax, eax
jz .fail
mov esi, [eax+HDLL.fd]
.scan_hdll:
cmp esi, eax
jz .fail
mov edx, ebx
sub edx, [esi+HDLL.base]
cmp edx, [esi+HDLL.size]
jb .fault_in_hdll
.scan_hdll.next:
mov esi, [esi+HDLL.fd]
jmp .scan_hdll
.fault_in_hdll:
; allocate new page, map it as rw and copy data
call alloc_page
test eax, eax
jz .fail
stdcall map_page, ebx, eax, PG_UW
mov edi, ebx
mov ecx, 1024
sub ebx, [esi+HDLL.base]
mov esi, [esi+HDLL.parent]
mov esi, [esi+DLLDESCR.data]
add esi, ebx
rep movsd
jmp .exit
.kernel_space:
test eax, PG_MAP
jz .fail ;страница не присутствует
test eax, 12 ;U/S (+below)
jnz .fail ;приложение обратилось к памяти
;ядра
;test eax, 8
;jnz .fail ;установлен зарезервированный бит
;в таблицах страниц. добавлено в P4/Xeon
;попытка записи в защищённую страницу ядра
cmp ebx, tss._io_map_0
jb .fail
cmp ebx, tss._io_map_0+8192
jae .fail
; io permission map
; copy-on-write protection
call alloc_page
test eax, eax
jz .fail
push eax
stdcall map_page, [.err_addr], eax, dword PG_SW
pop eax
mov edi, [.err_addr]
and edi, -4096
lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0
mov ebx, esi
shr ebx, 12
mov edx, [current_slot]
or eax, PG_SW
mov [edx+APPDATA.io_map+ebx*4], eax
add esi, [default_io_map]
mov ecx, 4096/4
;cld ;caller is duty for this
rep movsd
jmp .exit
endp
; returns number of mapped bytes
proc map_mem stdcall, lin_addr:dword,slot:dword,\
ofs:dword,buf_size:dword,req_access:dword
push 0 ; initialize number of mapped bytes
cmp [buf_size], 0
jz .exit
mov eax, [slot]
shl eax, 8
mov eax, [SLOT_BASE+eax+APPDATA.process]
mov eax, [eax+PROC.pdt_0_phys]
and eax, 0xFFFFF000
stdcall map_page, [ipc_pdir], eax, PG_UW
mov ebx, [ofs]
shr ebx, 22
mov esi, [ipc_pdir]
mov edi, [ipc_ptab]
mov eax, [esi+ebx*4]
and eax, 0xFFFFF000
jz .exit
stdcall map_page, edi, eax, PG_UW
@@:
mov edi, [lin_addr]
and edi, 0xFFFFF000
mov ecx, [buf_size]
add ecx, 4095
shr ecx, 12
inc ecx
mov edx, [ofs]
shr edx, 12
and edx, 0x3FF
mov esi, [ipc_ptab]
.map:
stdcall safe_map_page, [slot], [req_access], [ofs]
jnc .exit
add dword [ebp-4], 4096
add [ofs], 4096
dec ecx
jz .exit
add edi, 0x1000
inc edx
cmp edx, 0x400
jnz .map
inc ebx
mov eax, [ipc_pdir]
mov eax, [eax+ebx*4]
and eax, 0xFFFFF000
jz .exit
stdcall map_page, esi, eax, PG_UW
xor edx, edx
jmp .map
.exit:
pop eax
ret
endp
proc map_memEx stdcall, lin_addr:dword,slot:dword,\
ofs:dword,buf_size:dword,req_access:dword
push 0 ; initialize number of mapped bytes
cmp [buf_size], 0
jz .exit
mov eax, [slot]
shl eax, 8
mov eax, [SLOT_BASE+eax+APPDATA.process]
mov eax, [eax+PROC.pdt_0_phys]
and eax, 0xFFFFF000
stdcall map_page, [proc_mem_pdir], eax, PG_UW
mov ebx, [ofs]
shr ebx, 22
mov esi, [proc_mem_pdir]
mov edi, [proc_mem_tab]
mov eax, [esi+ebx*4]
and eax, 0xFFFFF000
test eax, eax
jz .exit
stdcall map_page, edi, eax, PG_UW
@@:
mov edi, [lin_addr]
and edi, 0xFFFFF000
mov ecx, [buf_size]
add ecx, 4095
shr ecx, 12
inc ecx
mov edx, [ofs]
shr edx, 12
and edx, 0x3FF
mov esi, [proc_mem_tab]
.map:
stdcall safe_map_page, [slot], [req_access], [ofs]
jnc .exit
add dword [ebp-4], 0x1000
add edi, 0x1000
add [ofs], 0x1000
inc edx
dec ecx
jnz .map
.exit:
pop eax
ret
endp
; in: esi+edx*4 = pointer to page table entry
; in: [slot], [req_access], [ofs] on the stack
; in: edi = linear address to map
; out: CF cleared <=> failed
; destroys: only eax
proc safe_map_page stdcall, slot:dword, req_access:dword, ofs:dword
mov eax, [esi+edx*4]
test al, PG_MAP
jz .not_present
test al, PG_WRITE
jz .resolve_readonly
; normal case: writable page, just map with requested access
.map:
stdcall map_page, edi, eax, [req_access]
stc
.fail:
ret
.not_present:
; check for alloc-on-demand page
test al, 2
jz .fail
; allocate new page, save it to source page table
push ecx
call alloc_page
pop ecx
test eax, eax
jz .fail
or al, PG_UW
mov [esi+edx*4], eax
jmp .map
.resolve_readonly:
; readonly page, probably copy-on-write
; check: readonly request of readonly page is ok
test [req_access], PG_WRITE
jz .map
; find control structure for this page
pushf
cli
cld
push ebx ecx
mov eax, [slot]
shl eax, 8
mov eax, [SLOT_BASE+eax+APPDATA.dlls_list_ptr]
test eax, eax
jz .no_hdll
mov ecx, [eax+HDLL.fd]
.scan_hdll:
cmp ecx, eax
jz .no_hdll
mov ebx, [ofs]
and ebx, not 0xFFF
sub ebx, [ecx+HDLL.base]
cmp ebx, [ecx+HDLL.size]
jb .hdll_found
mov ecx, [ecx+HDLL.fd]
jmp .scan_hdll
.no_hdll:
pop ecx ebx
popf
clc
ret
.hdll_found:
; allocate page, save it in page table, map it, copy contents from base
mov eax, [ecx+HDLL.parent]
add ebx, [eax+DLLDESCR.data]
call alloc_page
test eax, eax
jz .no_hdll
or al, PG_UW
mov [esi+edx*4], eax
stdcall map_page, edi, eax, [req_access]
push esi edi
mov esi, ebx
mov ecx, 4096/4
rep movsd
pop edi esi
pop ecx ebx
popf
stc
ret
endp
sys_IPC:
;input:
; ebx=1 - set ipc buffer area
; ecx=address of buffer
; edx=size of buffer
; eax=2 - send message
; ebx=PID
; ecx=address of message
; edx=size of message
dec ebx
jnz @f
mov eax, [current_slot]
pushf
cli
mov [eax+APPDATA.ipc_start], ecx ;set fields in extended information area
mov [eax+APPDATA.ipc_size], edx
add edx, ecx
add edx, 4095
and edx, not 4095
.touch:
mov eax, [ecx]
add ecx, 0x1000
cmp ecx, edx
jb .touch
popf
mov [esp+32], ebx ;ebx=0
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;2
@@:
dec ebx
jnz @f
stdcall sys_ipc_send, ecx, edx, esi
mov [esp+32], eax
ret
@@:
or eax, -1
mov [esp+32], eax
ret
;align 4
;proc set_ipc_buff
; mov eax,[current_slot]
; pushf
; cli
; mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area
; mov [eax+APPDATA.ipc_size],ecx
;
; add ecx, ebx
; add ecx, 4095
; and ecx, not 4095
;
;.touch: mov eax, [ebx]
; add ebx, 0x1000
; cmp ebx, ecx
; jb .touch
;
; popf
; xor eax, eax
; ret
;endp
proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword
locals
dst_slot dd ?
dst_offset dd ?
buf_size dd ?
used_buf dd ?
endl
pushf
cli
mov eax, [PID]
call pid_to_slot
test eax, eax
jz .no_pid
mov [dst_slot], eax
shl eax, 8
mov edi, [eax+SLOT_BASE+0xa0] ;is ipc area defined?
test edi, edi
jz .no_ipc_area
mov ebx, edi
and ebx, 0xFFF
mov [dst_offset], ebx
mov esi, [eax+SLOT_BASE+0xa4]
mov [buf_size], esi
mov ecx, [ipc_tmp]
cmp esi, 0x40000-0x1000; size of [ipc_tmp] minus one page
jbe @f
push esi edi
add esi, 0x1000
stdcall alloc_kernel_space, esi
mov ecx, eax
pop edi esi
@@:
mov [used_buf], ecx
stdcall map_mem, ecx, [dst_slot], \
edi, esi, PG_SW
mov edi, [dst_offset]
add edi, [used_buf]
cmp dword [edi], 0
jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now
mov edx, dword [edi+4]
lea ebx, [edx+8]
add ebx, [msg_size]
cmp ebx, [buf_size]
ja .buffer_overflow ;esi<0 - not enough memory in buffer
mov dword [edi+4], ebx
mov eax, [TASK_BASE]
mov eax, [eax+0x04] ;eax - our PID
add edi, edx
mov [edi], eax
mov ecx, [msg_size]
mov [edi+4], ecx
add edi, 8
mov esi, [msg_addr]
; add esi, new_app_base
cld
rep movsb
mov ebx, [ipc_tmp]
mov edx, ebx
shr ebx, 12
xor eax, eax
mov [page_tabs+ebx*4], eax
invlpg [edx]
mov ebx, [ipc_pdir]
mov edx, ebx
shr ebx, 12
xor eax, eax
mov [page_tabs+ebx*4], eax
invlpg [edx]
mov ebx, [ipc_ptab]
mov edx, ebx
shr ebx, 12
xor eax, eax
mov [page_tabs+ebx*4], eax
invlpg [edx]
mov eax, [dst_slot]
shl eax, 8
or [eax+SLOT_BASE+0xA8], dword 0x40
push 0
jmp .ret
.no_pid:
popf
mov eax, 4
ret
.no_ipc_area:
popf
xor eax, eax
inc eax
ret
.ipc_blocked:
push 2
jmp .ret
.buffer_overflow:
push 3
.ret:
mov eax, [used_buf]
cmp eax, [ipc_tmp]
jz @f
stdcall free_kernel_space, eax
@@:
pop eax
popf
ret
endp
align 4
sysfn_meminfo:
; add ecx, new_app_base
cmp ecx, OS_BASE
jae .fail
mov eax, [pg_data.pages_count]
mov [ecx], eax
shl eax, 12
mov [esp+32], eax
mov eax, [pg_data.pages_free]
mov [ecx+4], eax
mov eax, [pg_data.pages_faults]
mov [ecx+8], eax
mov eax, [heap_size]
mov [ecx+12], eax
mov eax, [heap_free]
mov [ecx+16], eax
mov eax, [heap_blocks]
mov [ecx+20], eax
mov eax, [free_blocks]
mov [ecx+24], eax
ret
.fail:
or dword [esp+32], -1
ret
align 4
f68:
cmp ebx, 4
jbe sys_sheduler
cmp ebx, 11
jb .fail
cmp ebx, 27
ja .fail
jmp dword [f68call+ebx*4-11*4]
.11:
call init_heap
mov [esp+32], eax
ret
.12:
stdcall user_alloc, ecx
mov [esp+32], eax
ret
.13:
stdcall user_free, ecx
mov [esp+32], eax
ret
.14:
cmp ecx, OS_BASE
jae .fail
mov edi, ecx
call get_event_ex
mov [esp+32], eax
ret
.16:
test ecx, ecx
jz .fail
cmp ecx, OS_BASE
jae .fail
stdcall get_service, ecx
mov [esp+32], eax
ret
.17:
call srv_handlerEx ;ecx
mov [esp+32], eax
ret
.19:
cmp ecx, OS_BASE
jae .fail
stdcall load_library, ecx
mov [esp+32], eax
ret
.20:
mov eax, edx
mov ebx, ecx
call user_realloc ;in: eax = pointer, ebx = new size
mov [esp+32], eax
ret
.21:
cmp ecx, OS_BASE
jae .fail
cmp edx, OS_BASE
jae .fail
stdcall load_pe_driver, ecx, edx
mov [esp+32], eax
ret
.22:
cmp ecx, OS_BASE
jae .fail
stdcall shmem_open, ecx, edx, esi
mov [esp+24], edx
mov [esp+32], eax
ret
.23:
cmp ecx, OS_BASE
jae .fail
stdcall shmem_close, ecx
mov [esp+32], eax
ret
.24:
mov eax, [current_slot]
xchg ecx, [eax+APPDATA.exc_handler]
xchg edx, [eax+APPDATA.except_mask]
mov [esp+32], ecx ; reg_eax+8
mov [esp+20], edx ; reg_ebx+8
ret
.25:
cmp ecx, 32
jae .fail
mov eax, [current_slot]
btr [eax+APPDATA.except_mask], ecx
setc byte[esp+32]
jecxz @f
bts [eax+APPDATA.except_mask], ecx
@@:
ret
.26:
stdcall user_unmap, ecx, edx, esi
mov [esp+32], eax
ret
.27:
cmp ecx, OS_BASE
jae .fail
stdcall load_file_umode, ecx
mov [esp+24], edx
mov [esp+32], eax
ret
.fail:
xor eax, eax
mov [esp+32], eax
ret
align 4
f68call: ; keep this table closer to main code
dd f68.11 ; init_heap
dd f68.12 ; user_alloc
dd f68.13 ; user_free
dd f68.14 ; get_event_ex
dd f68.fail ; moved to f68.24
dd f68.16 ; get_service
dd f68.17 ; call_service
dd f68.fail ; moved to f68.25
dd f68.19 ; load_dll
dd f68.20 ; user_realloc
dd f68.21 ; load_driver
dd f68.22 ; shmem_open
dd f68.23 ; shmem_close
dd f68.24 ; set exception handler
dd f68.25 ; unmask exception
dd f68.26 ; user_unmap
dd f68.27 ; load_file_umode
align 4
proc load_pe_driver stdcall, file:dword, cmdline:dword
push esi
stdcall load_PE, [file]
test eax, eax
jz .fail
mov esi, eax
push [cmdline]
push DRV_ENTRY
call eax
pop ecx
pop ecx
test eax, eax
jz .fail
mov [eax+SRV.entry], esi
pop esi
ret
.fail:
xor eax, eax
pop esi
ret
endp
align 4
proc init_mtrr
cmp [BOOT_VARS+BOOT_MTRR], byte 2
je .exit
bt [cpu_caps], CAPS_MTRR
jnc .exit
mov eax, cr0
or eax, 0x60000000 ;disable caching
mov cr0, eax
wbinvd ;invalidate cache
mov ecx, 0x2FF
rdmsr ;
; has BIOS already initialized MTRRs?
test ah, 8
jnz .skip_init
; rarely needed, so mainly placeholder
; main memory - cached
push eax
mov eax, [MEM_AMOUNT]
; round eax up to next power of 2
dec eax
bsr ecx, eax
mov ebx, 2
shl ebx, cl
dec ebx
; base of memory range = 0, type of memory range = MEM_WB
xor edx, edx
mov eax, MEM_WB
mov ecx, 0x200
wrmsr
; mask of memory range = 0xFFFFFFFFF - (size - 1), ebx = size - 1
mov eax, 0xFFFFFFFF
mov edx, 0x0000000F
sub eax, ebx
sbb edx, 0
or eax, 0x800
inc ecx
wrmsr
; clear unused MTRRs
xor eax, eax
xor edx, edx
@@:
inc ecx
wrmsr
cmp ecx, 0x20F
jb @b
; enable MTRRs
pop eax
or ah, 8
and al, 0xF0; default memtype = UC
mov ecx, 0x2FF
wrmsr
.skip_init:
stdcall set_mtrr, [LFBAddress], [LFBSize], MEM_WC
wbinvd ;again invalidate
mov eax, cr0
and eax, not 0x60000000
mov cr0, eax ; enable caching
.exit:
ret
endp
align 4
proc set_mtrr stdcall, base:dword,size:dword,mem_type:dword
; find unused register
mov ecx, 0x201
@@:
rdmsr
dec ecx
test ah, 8
jz .found
rdmsr
mov al, 0; clear memory type field
cmp eax, [base]
jz .ret
add ecx, 3
cmp ecx, 0x210
jb @b
; no free registers, ignore the call
.ret:
ret
.found:
; found, write values
xor edx, edx
mov eax, [base]
or eax, [mem_type]
wrmsr
mov ebx, [size]
dec ebx
mov eax, 0xFFFFFFFF
mov edx, 0x00000000
sub eax, ebx
sbb edx, 0
or eax, 0x800
inc ecx
wrmsr
ret
endp
align 4
proc create_ring_buffer stdcall, size:dword, flags:dword
locals
buf_ptr dd ?
endl
mov eax, [size]
test eax, eax
jz .fail
add eax, eax
stdcall alloc_kernel_space, eax
test eax, eax
jz .fail
push ebx
mov [buf_ptr], eax
mov ebx, [size]
shr ebx, 12
push ebx
stdcall alloc_pages, ebx
pop ecx
test eax, eax
jz .mm_fail
push edi
or eax, [flags]
mov edi, [buf_ptr]
mov ebx, [buf_ptr]
mov edx, ecx
shl edx, 2
shr edi, 10
@@:
mov [page_tabs+edi], eax
mov [page_tabs+edi+edx], eax
invlpg [ebx]
invlpg [ebx+0x10000]
add eax, 0x1000
add ebx, 0x1000
add edi, 4
dec ecx
jnz @B
mov eax, [buf_ptr]
pop edi
pop ebx
ret
.mm_fail:
stdcall free_kernel_space, [buf_ptr]
xor eax, eax
pop ebx
.fail:
ret
endp
align 4
proc print_mem
mov edi, BOOT_VAR + 0x9104
mov ecx, [edi-4]
test ecx, ecx
jz .done
@@:
mov eax, [edi]
mov edx, [edi+4]
add eax, [edi+8]
adc edx, [edi+12]
DEBUGF 1, "K : E820 %x%x - %x%x type %d\n", \
[edi+4], [edi],\
edx, eax, [edi+16]
add edi, 20
dec ecx
jnz @b
.done:
ret
endp