include 'proc32.inc'
DLL_ENTRY equ 1
DLL_EXIT equ -1
REQ_DLL_VER equ 4
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 (gets2() demo in this case).
push caption
push 25
push 80
push 25
push 80
call [con_init]
; C-equivalent of the following code:
; for (;;)
; {
; con_write_asciiz("Enter string (empty for exit): ");
; con_gets2(mycallback,s,256);
; 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
push mycallback
call [con_gets2]
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 mycallback stdcall, keycode:dword, pstr:dword, pn:dword, ppos:dword
mov eax, [keycode]
cmp al, 0x0F
jz .tab
cmp al, 0x3B
jz .f1
cmp al, 0x48
jz .up
cmp al, 0x50
jz .down
xor eax, eax
ret
.tab:
; Tab pressed - insert "[autocomplete]" to current position
push esi edi
mov eax, [ppos]
mov eax, [eax]
mov ecx, [pn]
mov ecx, [ecx]
mov esi, [pstr]
mov esi, [esi]
add ecx, esi
add esi, eax
mov edx, esi
@@:
lodsb
test al, al
jnz @b
lea edi, [esi+str3.len]
cmp edi, ecx
jbe @f
mov edi, ecx
lea esi, [edi-str3.len]
@@:
cmp esi, edx
jbe @f
dec esi
dec edi
mov al, [esi]
mov [edi], al
jmp @b
@@:
cmp edi, ecx
jb @f
dec edi
@@:
mov ecx, edi
sub ecx, edx
mov edi, edx
mov esi, str3
rep movsb
mov eax, [pstr]
sub edi, [eax]
mov eax, [ppos]
mov [eax], edi
pop edi esi
xor eax, eax
inc eax
ret
.f1:
; F1 pressed - say message
push str4
call [con_write_asciiz]
push str1
call [con_write_asciiz]
push 2
pop eax
ret
.up:
push esi
mov esi, str5
mov ecx, str5.len
jmp @f
.down:
push esi
mov esi, str6
mov ecx, str6.len
@@:
push edi
mov edi, [pstr]
mov edi, [edi]
mov eax, [ppos]
mov [eax], ecx
rep movsb
xor eax, eax
stosb
pop edi esi
inc eax
ret
endp
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_gets2 dd szcon_gets2
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_gets2 db 'con_gets2',0
dllname db '/sys/lib/console.obj',0
caption db 'Console test - gets2()',0
str1 db 'Enter string (empty for exit): ',0
str2 db 'You entered: ',0
str3 db '[autocomplete]'
str3.len = $ - str3
str4 db 13,10,'Help? What help do you need?',13,10,0
str5 db 'previous line in the history'
str5.len = $ - str5
str6 db 'next line in the history'
str6.len = $ - str6
i_end:
s rb 256
align 4
rb 2048 ; stack
mem: