Programming Forums - View Single Post

Lance · Dec 26th, 2004, 4:06 AM

So I'm fairly new at Assembly, but I get the jist of it. I'm trying to learn AT&T syntax, and the sort, but it's proving a bit difficult to adjust to.

This is supposed to be an infinate loop incrementation, that just prints the numbers as they increment. That's it. Can anyone point out where I went wrong? All criticism and tips would be great, as long as their is an explaination why I did it wrong.

(Toggle Plain Text)

.bss
count:
    .long 0

.text
.globl main

main:
    movl  $5,%eax
    movl  $1,%ebx
repeat:
    movl  $count,%ecx
    movl  $count,%edx
    int   $0x80

    incl  count
    jmp   repeat

    ret

I'm pretty sure using the BSS segment as a var for a simple incrementation is stupid, but I'm trying to figure out how using variables really works. I've tried this with the %esp and #esi register just to see if my usage of $count is wrong, but it turns out the same.

Any help would be nice.

Dec 26th, 2004, 4:06 AM	#1
Lance Programmer Join Date: Oct 2004 Location: Chicago, IL USA Posts: 74 Rep Power: 5	So I'm fairly new at Assembly, but I get the jist of it. I'm trying to learn AT&T syntax, and the sort, but it's proving a bit difficult to adjust to. This is supposed to be an infinate loop incrementation, that just prints the numbers as they increment. That's it. Can anyone point out where I went wrong? All criticism and tips would be great, as long as their is an explaination why I did it wrong. (Toggle Plain Text) .bss count: .long 0 .text .globl main main: movl $5,%eax movl $1,%ebx repeat: movl $count,%ecx movl $count,%edx int $0x80 incl count jmp repeat ret .bss count: .long 0 .text .globl main main: movl $5,%eax movl $1,%ebx repeat: movl $count,%ecx movl $count,%edx int $0x80 incl count jmp repeat ret I'm pretty sure using the BSS segment as a var for a simple incrementation is stupid, but I'm trying to figure out how using variables really works. I've tried this with the %esp and #esi register just to see if my usage of $count is wrong, but it turns out the same. Any help would be nice. __________________ (Toggle Plain Text) /* LANCE / C++; / this makes C bigger but returns the old value / char site = "slackwise.net", home = "lance.slackwise.net", pics = "flickr.com/photos/slackwise"; /* LANCE / C++; / this makes C bigger but returns the old value / char site = "slackwise.net", home = "lance.slackwise.net", pics = "flickr.com/photos/slackwise";