forked from KolibriOS/kolibrios
kernel:f68.27 load_file_umode
git-svn-id: svn://kolibrios.org@3786 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -408,7 +408,7 @@ endp
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; allocate kernel memory and loads the specified file
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;
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; param
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; file_name= full path to file
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; file_name= path to file
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;
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; retval
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; eax= file image in kernel memory
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@ -509,6 +509,136 @@ proc load_file stdcall, file_name:dword
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ret
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endp
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; description
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; allocate user memory and loads the specified file
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;
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; param
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; file_name= path to file
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;
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; retval
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; eax= file image in user memory
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; ebx= size of file
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;
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; warging
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; You mast call kernel_free() to delete each file
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; loaded by the load_file() function
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align 4
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proc load_file_umode stdcall, file_name:dword
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locals
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attr dd ?
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flags dd ?
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cr_time dd ?
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cr_date dd ?
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acc_time dd ?
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acc_date dd ?
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mod_time dd ?
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mod_date dd ?
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file_size dd ?
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km_file dd ?
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um_file dd ?
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endl
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push esi
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push edi
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push ebx
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lea eax, [attr]
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stdcall get_fileinfo, [file_name], eax ;find file and get info
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test eax, eax
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jnz .err_1
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mov eax, [file_size]
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cmp eax, 1024*1024*16 ;to be enough for anybody (c)
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ja .err_1
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;it is very likely that the file is packed
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stdcall kernel_alloc, [file_size] ;with kpack, so allocate memory from kernel heap
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mov [km_file], eax
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test eax, eax
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jz .err_1
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stdcall read_file, [file_name], eax, dword 0, [file_size]
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cmp ebx, [file_size]
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jne .err_2
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mov eax, [km_file]
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cmp dword [eax], 0x4B43504B ; check kpack signature
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jne .raw_file
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mov ebx, [eax+4] ;get real size of file
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mov [file_size], ebx
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stdcall user_alloc, ebx ;and allocate memory from user heap
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mov [um_file], eax
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test eax, eax
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jz .err_2
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pushad
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mov ecx, unpack_mutex
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call mutex_lock
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stdcall unpack, [km_file], [um_file]
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mov ecx, unpack_mutex
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call mutex_unlock
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popad
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stdcall kernel_free, [km_file] ;we don't need packed file anymore
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.exit:
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mov eax, [um_file]
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mov edx, [file_size]
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pop ebx
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pop edi
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pop esi
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ret
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.raw_file: ; sometimes we load unpacked file
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stdcall user_alloc, ebx ; allocate space from user heap
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mov [um_file], eax
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test eax, eax
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jz .err_2
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shr eax, 10 ; and remap pages.
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mov ecx, [file_size]
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add ecx, 4095
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shr ecx, 12
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mov esi, [km_file]
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shr esi, 10
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add esi, page_tabs
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lea edi, [page_tabs+eax]
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cld
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@@:
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lodsd
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and eax, 0xFFFFF000
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or eax, PG_USER
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stosd
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loop @B
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stdcall free_kernel_space, [km_file] ; release allocated kernel space
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jmp .exit ; physical pages still in use
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.err_2:
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stdcall kernel_free, [km_file]
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.err_1:
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xor eax, eax
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xor edx, edx
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pop ebx
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pop edi
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pop esi
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ret
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endp
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uglobal
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align 4
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unpack_mutex MUTEX
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@ -50,7 +50,7 @@ proc attach_int_handler stdcall, irq:dword, handler:dword, user_data:dword
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locals
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.irqh dd ?
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endl
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DEBUGF 1, "K : Attach Interrupt %d Handler %x\n", [irq], [handler]
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and [.irqh], 0
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@ -1199,7 +1199,7 @@ f68:
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cmp ebx, 11
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jb .fail
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cmp ebx, 25
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cmp ebx, 27
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ja .fail
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jmp dword [f68call+ebx*4-11*4]
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@ -1310,6 +1310,15 @@ f68:
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mov [esp+32], eax
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ret
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.27:
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cmp ecx, OS_BASE
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jae .fail
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stdcall load_file_umode, ecx
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mov [esp+24], edx
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mov [esp+32], eax
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ret
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.fail:
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xor eax, eax
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mov [esp+32], eax
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@ -1335,6 +1344,7 @@ f68call: ; keep this table closer to main code
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dd f68.24 ; set exception handler
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dd f68.25 ; unmask exception
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dd f68.26 ; user_unmap
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dd f68.27 ; load_file_umode
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align 4
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