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dll.inc
executable file
·138 lines (138 loc) · 2.48 KB
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dll.inc
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;-----------------------------------------------------------------------------
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
push eax
mov eax, [eax]
cmp dword[eax], 'lib_'
pop eax
jnz @f
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
;-----------------------------------------------------------------------------
proc mem.Alloc, size
push ebx ecx
mov ecx, [size]
mcall 68, 12
pop ecx ebx
ret
endp
;-----------------------------------------------------------------------------
proc mem.ReAlloc, mptr, size
push ebx ecx edx
mov ecx, [size]
mov edx, [mptr]
mcall 68, 20
pop edx ecx ebx
ret
endp
;-----------------------------------------------------------------------------
proc mem.Free, mptr
push ebx ecx
mov ecx,[mptr]
mcall 68, 13
pop ecx ebx
ret
endp
;-----------------------------------------------------------------------------