more assembly

[Sirrius]

Is there a conversion for this at&t syntax into nasm?

.LC0:
.ascii "The date is: %s\0"

_ByteSwap4_asm:

I don't know if this is enough code to figure it out. I did'nt want to put the entrie page up. It's just supposed to display the time with call in code. .LCO gets pushed on the stack. Thanks.

[ZoogieZork]

Something like this?

.LC0:
DB 'The date is: %s',0

- Mike

[Sirrius]

Well yet another road block for this rookie in assembly coding. I am getting compile errors that say symbol time is undefined and _ctime,_printf,_LCO as well are undefined. I cant figure out why, I have rearranged the global and text labels with no prevail. Maybe one of you guys can spot the idiot flaw that I can't.

; .file "ByteSwap4.c"
global _ByteSwap4_asm
section .text
LC0:
DB "The date is: %s",0

_ByteSwap4_asm:
push ebp ;pushl %ebp
mov ebp,esp ;movl %esp, %ebp
sub esp,24 ;subl $24, %esp
sub esp,12 ;subl $12, %esp
lea eax,[ebp-4] ;leal -4(%ebp), %eax
push eax ;pushl %eax
call time ;call _time
add esp,16 ;addl $16, %esp
sub esp,8 ;subl $8, %esp
sub esp,4 ;subl $4, %esp
lea eax,[ebp-4] ;leal -4(%ebp), %eax
push eax ;pushl %eax
call _ctime ;call _ctime
add esp,8 ;addl $8, %esp
push eax ;pushl %eax
push dword _LCO ;pushl $LC0
call printf ;call _printf
add esp,16 ;addl $16, %esp
mov [ebp-8],0 ;movl $0, -8(%ebp)
L2:
mov eax,[ebp-8] ;movl -8(%ebp), %eax
cmp eax,[ebp+8] ;cmpl 8(%ebp), %eax
jl L5
jmp L1
L5:
mov eax,[ebp-8] ;movl -8(%ebp), %eax
lea edx,[eax*4] ;leal 0(,%eax,4), %edx
mov eax,[ebp+12] ;movl 12(%ebp), %eax
mov eax,[eax+edx] ;movl (%eax,%edx), %eax
mov [ebp-12],eax ;movl %eax, -12(%ebp)
mov al,[ebp-ebp] ;movb -12(%ebp), %al
mov [ebp-13],al ;movb %al, -13(%ebp)
mov al,[ebp-11] ;movb -11(%ebp), %al
mov [ebp-14],al ;movb %al, -14(%ebp)
mov al,[ebp-10] ;movb -10(%ebp), %al
mov [ebp-15],al ;movb %al, -15(%ebp)
mov al,[ebp-9] ;movb -9(%ebp), %al
mov [ebp-16],al ;movb %al, -16(%ebp)
mov eax,[ebp-8] ;movl -8(%ebp), %eax
lea ecx,[eax*4] ;leal 0(,%eax,4), %ecx
mov edx,[ebp+12] ;movl 12(%ebp), %edx
mov eax,[ebp-16] ;movl -16(%ebp), %eax
mov [edx+ecx],eax ;movl %eax, (%edx,%ecx)
lea eax,[ebp-8] ;leal -8(%ebp), %eax
inc dword [eax] ;incl (%eax)
jmp L2
L1:
leave
ret

;.ident	"GCC: (GNU) 3.2.3"

[Steve S]

your push dword _LCO should probably be without the "_", since your symbol earlier doesn't include that. There's no reference anywhere that says what _ctime or _printf or time are. You know they're in a library somewhere, but NASM doesn't. In MASM you'd use EXTRN to declare them, so presumably NASM has a similar facility? Steve S