Hi
Lot of ppl tell me that I did not proper zero the EAX register,so 3 MSB
of eax corrupt trapping the syscall, but Its OK.
I successfully run the shellcodes on a debian box,but in gentoo,allways
SEGFAULT.
There is it, a new log:
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petalo shellcode # cat 1.asm
BITS 32
;exit()
xor eax,eax
xor ebx,ebx
mov eax,1
int 0x80
petalo shellcode # nasm -g -f elf 1.asm
petalo shellcode # ld 1.o
ld: warning: cannot find entry symbol _start; defaulting to
00000000080480a0
petalo shellcode # ./a.out
Segmentation fault
petalo shellcode # gdb -q a.out
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) break 1
Breakpoint 1 at 0x80480a0: file 1.asm, line 1.
(gdb) r
Starting program: /root/code/shellcode/a.out
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
You can't do that without a process to debug.
(gdb) q
petalo shellcode #
Linux petalo 2.6.12-gentoo-r6 #9 Sat Dec 24 14:37:56 CET 2005 i686 AMD
Athlon(tm) XP 1600+ AuthenticAMD GNU/Linux
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I cant explain why SIGFAULT.
I did not edit any advanced kernel configurations rather than snd card
and ethernet.
Thanks in advance.
Received on Feb 21 2006
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