Ubuntu 9.10 issues

[nobody]

It seems that my assembled application is crashing before it even gets to run any code, I say that because even when I have a breakpoint set on the first instruction if fails.

This is only happening on my 9.10 box.


Any advice from those with superior knowledge?



***$*** uname -a

Linux msi 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:04:26 UTC 2009 i686 GNU/Linux

code:
-
section .data
section .text
global _start
_start:
nop



***$*** nasm -f elf32 -g -F stabs sandbox.asm -l sandbox.lst

***$*** ld -o sandbox sandbox.o

***$*** ./sandbox

Segmentation fault

---

[Frank Kotler]

I am highly inexpert on gdb. I consider it "unfriendly".

A quick test on your code seems to be "not stopping" on a breakpoint set at _start. If I put a label after the "nop" and set a breakpoint there (and another "nop" after it), instead of on "_start", it does seem to stop(?).

I'd put an "exit" at the end of this, even if it's intended to only be run in a "sandbox" (although Jeff Duntemann doesn't always do so - you got his new book?)

Dunno if that helps...

Best,
Frank

[nobody]

First, I must commemorate you on your catch of my recent purchase.

Adding the exit has made it work, which just make me feel silly for not trying it sooner.

Thanks,

:)