[buug] cannot execute binary file or use printf

Ian Zimmerman itz at buug.org
Mon Apr 13 19:43:33 PDT 2009

If I try to use printf I can't link:

john at ldev:~/asm/test$ cat add.s
.section .data
        .asciz "%d = %d + %d\n"
.section .text
.globl _start
        movl $9, %eax
        movl $22, %ebx
        pushl %ebx
        pushl %eax
        xadd %eax, %ebx
        pushl %ebx
        pushl $output
        call printf
        call exit
john at ldev:~/asm/test$ as ./add.s -o add.o
john at ldev:~/asm/test$ ld -dynamic-linker /lib/ld-linux.so.2 -o add add.o
add.o: In function `_start':
(.text+0x17): undefined reference to `printf'
add.o: In function `_start':
(.text+0x1c): undefined reference to `exit
john at ldev:~/asm/test$

If you execute ld explicitly (as opposed to having gcc execute it for you),
you must also list all libraries, including libc.  So adding -lc (and possibly
-lm) to your command should help.

I assume your system is Linux .. you know better than not telling us :) 
Not sure exactly about the first problem, but it happens to me too.
I also tried it with gcc:

itz at matica:~$ gcc -nostartfiles -nostdlib -o jump jump.s
itz at matica:~$ ./jump
bash: ./jump: cannot execute binary file

Have you upgraded the kernel recently?  I did.

Ian Zimmerman <itz at buug.org>
gpg public key: 1024D/C6FF61AD 
fingerprint: 66DC D68F 5C1B 4D71 2EE5  BD03 8A00 786C C6FF 61AD
Ham is for reading, not for eating.

More information about the buug mailing list