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kernel.load_file_umode: allocate physical storage before unpacking 

git-svn-id: svn://kolibrios.org@4237 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge) 2013-11-16 08:41:01 +00:00
parent 89e5a3c15c
commit 145adf316e
1 changed files with 34 additions and 6 deletions
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40
kernel/trunk/core/dll.inc
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@ -544,7 +544,6 @@ proc load_file_umode stdcall, file_name:dword
push edi
push ebx
lea eax, [attr]
stdcall get_fileinfo, [file_name], eax ;find file and get info
test eax, eax
@ -570,11 +569,26 @@ proc load_file_umode stdcall, file_name:dword
mov ebx, [eax+4] ;get real size of file
mov [file_size], ebx
stdcall user_alloc, ebx ;and allocate memory from user heap
stdcall user_alloc, ebx ;and allocate space from user heap
mov [um_file], eax
test eax, eax
jz .err_2
mov edx, [file_size] ;preallocate page memory
shr eax, 10
lea edi, [page_tabs+eax]
add edx, 4095
shr edx, 12
@@:
call alloc_page
test eax, eax
jz .err_3
or eax, PG_UW
stosd
dec edx
jnz @B
pushad
mov ecx, unpack_mutex
call mutex_lock
@ -587,15 +601,28 @@ proc load_file_umode stdcall, file_name:dword
stdcall kernel_free, [km_file] ;we don't need packed file anymore
.exit:
mov edi, [um_file]
mov esi, [um_file]
mov eax, [file_size]
mov edx, eax
add edi, eax ;cleanup remain space
mov ecx, 4096 ;from file end
and eax, 4095
jz @f
sub ecx, eax
xor eax, eax
cld
rep stosb
@@:
mov eax, [um_file]
mov edx, [file_size]
pop ebx
pop edi
pop esi
ret
.raw_file: ; sometimes we load unpacked file
stdcall user_alloc, ebx ; allocate space from user heap
mov [um_file], eax
@ -619,13 +646,14 @@ proc load_file_umode stdcall, file_name:dword
@@:
lodsd
and eax, 0xFFFFF000
or eax, PG_USER
or eax, PG_UW
stosd
loop @B
stdcall free_kernel_space, [km_file] ; release allocated kernel space
jmp .exit ; physical pages still in use
.err_3:
stdcall user_free, [um_file]
.err_2:
stdcall kernel_free, [km_file]
.err_1: