157 lines
3.4 KiB
NASM
157 lines
3.4 KiB
NASM
|
|
include 'proc32.inc'
|
|
|
|
DLL_ENTRY equ 1
|
|
DLL_EXIT equ -1
|
|
REQ_DLL_VER equ 3
|
|
|
|
use32
|
|
db 'MENUET01'
|
|
dd 1
|
|
dd start
|
|
dd i_end
|
|
dd mem
|
|
dd mem
|
|
dd 0
|
|
dd 0
|
|
|
|
start:
|
|
stdcall load_dll_and_import, dllname, imports
|
|
test eax, eax
|
|
jz exit
|
|
|
|
; check version
|
|
cmp word [dll_ver], REQ_DLL_VER
|
|
jb exit
|
|
cmp word [dll_ver+2], REQ_DLL_VER
|
|
ja exit
|
|
push DLL_ENTRY
|
|
call [dll_start]
|
|
|
|
; yes! Now do some work (gets() demo in this case).
|
|
|
|
push caption
|
|
push -1
|
|
push -1
|
|
push -1
|
|
push -1
|
|
call [con_init]
|
|
|
|
; C-equivalent of the following code:
|
|
; for (;;)
|
|
; {
|
|
; con_write_asciiz("Enter string (empty for exit): ");
|
|
; if (!con_gets(s,256)) break;
|
|
; if (s[0] == '\n') break;
|
|
; con_write_asciiz("You entered: ");
|
|
; con_write_asciiz(s);
|
|
; }
|
|
mainloop:
|
|
push str1
|
|
call [con_write_asciiz]
|
|
push 256
|
|
push s
|
|
call [con_gets]
|
|
test eax, eax
|
|
jz done
|
|
cmp [s], 10
|
|
jz done
|
|
push str2
|
|
call [con_write_asciiz]
|
|
push s
|
|
call [con_write_asciiz]
|
|
jmp mainloop
|
|
done:
|
|
push 1
|
|
call [con_exit]
|
|
exit:
|
|
or eax, -1
|
|
int 0x40
|
|
|
|
proc load_dll_and_import stdcall, _dllname:dword, _imports:dword
|
|
pushad
|
|
; load DLL
|
|
push 68
|
|
pop eax
|
|
push 19
|
|
pop ebx
|
|
mov ecx, [_dllname]
|
|
int 0x40
|
|
test eax, eax
|
|
jz import_fail
|
|
|
|
; initialize import
|
|
mov edi, eax
|
|
mov esi, [_imports]
|
|
import_loop:
|
|
lodsd
|
|
test eax, eax
|
|
jz import_done
|
|
mov edx, edi
|
|
import_find:
|
|
mov ebx, [edx]
|
|
test ebx, ebx
|
|
jz import_not_found
|
|
push eax
|
|
@@:
|
|
mov cl, [eax]
|
|
cmp cl, [ebx]
|
|
jnz import_find_next
|
|
test cl, cl
|
|
jz import_found
|
|
inc eax
|
|
inc ebx
|
|
jmp @b
|
|
import_find_next:
|
|
pop eax
|
|
add edx, 8
|
|
jmp import_find
|
|
import_found:
|
|
pop eax
|
|
mov eax, [edx+4]
|
|
mov [esi-4], eax
|
|
jmp import_loop
|
|
import_not_found:
|
|
import_fail:
|
|
popad
|
|
xor eax, eax
|
|
ret
|
|
import_done:
|
|
popad
|
|
xor eax, eax
|
|
inc eax
|
|
ret
|
|
endp
|
|
|
|
align 4
|
|
|
|
imports:
|
|
dll_start dd szStart
|
|
dll_ver dd szVersion
|
|
con_init dd szcon_init
|
|
con_write_asciiz dd szcon_write_asciiz
|
|
con_exit dd szcon_exit
|
|
con_gets dd szcon_gets
|
|
dd 0
|
|
|
|
szStart db 'START',0
|
|
szVersion db 'version',0
|
|
szcon_init db 'con_init',0
|
|
szcon_write_asciiz db 'con_write_asciiz',0
|
|
szcon_exit db 'con_exit',0
|
|
szcon_gets db 'con_gets',0
|
|
|
|
dllname db '/sys/lib/console.obj',0
|
|
|
|
caption db 'Console test - gets()',0
|
|
str1 db 'Enter string (empty for exit): ',0
|
|
str2 db 'You entered: ',0
|
|
|
|
i_end:
|
|
|
|
s rb 256
|
|
|
|
align 4
|
|
rb 2048 ; stack
|
|
mem:
|