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kolibrios/kernel/branches/net/applications/dll.inc

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;-----------------------------------------------------------------------------
proc mem.Alloc size ;/////////////////////////////////////////////////////////
;-----------------------------------------------------------------------------
push ebx ecx
mov eax,[size]
lea ecx,[eax+4+4095]
and ecx,not 4095
mcall 68,12
add ecx,-4
mov [eax],ecx
add eax,4
pop ecx ebx
ret
endp
;-----------------------------------------------------------------------------
proc mem.ReAlloc mptr,size;///////////////////////////////////////////////////
;-----------------------------------------------------------------------------
push ebx ecx esi edi eax
mov eax,[mptr]
mov ebx,[size]
or eax,eax
jz @f
lea ecx,[ebx+4+4095]
and ecx,not 4095
add ecx,-4
cmp ecx,[eax-4]
je .exit
@@: mov eax,ebx
call mem.Alloc
xchg eax,[esp]
or eax,eax
jz .exit
mov esi,eax
xchg eax,[esp]
mov edi,eax
mov ecx,[esi-4]
cmp ecx,[edi-4]
jbe @f
mov ecx,[edi-4]
@@: add ecx,3
shr ecx,2
cld
rep movsd
xchg eax,[esp]
call mem.Free
.exit:
pop eax edi esi ecx ebx
ret
endp
;-----------------------------------------------------------------------------
proc mem.Free mptr ;//////////////////////////////////////////////////////////
;-----------------------------------------------------------------------------
mov eax,[mptr]
or eax,eax
jz @f
push ebx ecx
lea ecx,[eax-4]
mcall 68,13
pop ecx ebx
@@: ret
endp
proc dll.Load, import_table:dword
mov esi,[import_table]
.next_lib: mov edx,[esi]
or edx,edx
jz .exit
push esi
mov esi,[esi+4]
mov edi,s_libdir.fname
@@: lodsb
stosb
or al,al
jnz @b
mcall 68,19,s_libdir
or eax,eax
jz .fail
stdcall dll.Link,eax,edx
stdcall dll.Init,[eax+4]
pop esi
add esi,8
jmp .next_lib
.exit: xor eax,eax
ret
.fail: add esp,4
xor eax,eax
inc eax
ret
endp
proc dll.Link, exp:dword,imp:dword
push eax
mov esi,[imp]
test esi,esi
jz .done
.next: lodsd
test eax,eax
jz .done
stdcall dll.GetProcAddress,[exp],eax
or eax,eax
jz @f
mov [esi-4],eax
jmp .next
@@: mov dword[esp],0
.done: pop eax
ret
endp
proc dll.Init, dllentry:dword
pushad
mov eax,mem.Alloc
mov ebx,mem.Free
mov ecx,mem.ReAlloc
mov edx,dll.Load
stdcall [dllentry]
popad
ret
endp
proc dll.GetProcAddress, exp:dword,sz_name:dword
mov edx,[exp]
xor eax,eax
.next: or edx,edx
jz .end
cmp dword[edx],0
jz .end
stdcall strcmp,[edx],[sz_name]
test eax,eax
jz .ok
add edx,8
jmp .next
.ok: mov eax,[edx+4]
.end: ret
endp
proc strcmp, str1:dword,str2:dword
push esi edi
mov esi,[str1]
mov edi,[str2]
xor eax,eax
@@: lodsb
scasb
jne .fail
or al,al
jnz @b
jmp .ok
.fail: or eax,-1
.ok: pop edi esi
ret
endp
s_libdir:
db '/sys/lib/'
.fname rb 32