#include <stdio.h>

int main(void) {
        printf("Hello Buildroot! \n");
        return 1;
}

compiled with:

arm-linux-gcc -o testhello main.c -L /home/CODE/buildroot-2011.08/output/staging/usr/lib/ --static

and linux kernel command line:

console=ttySAC2,38400 init=testhello root=/dev/nfs rw nfsroot=/rootfs ip=10.0.0.27:10.0.0.65:10.0.0.5:255.255.255.0 user_debug=31

result is:


Freeing init memory: 140K
pgd = c70e8000
[0000001c] *pgd=571df031, *pte=00000000, *ppte=00000000

Pid: 1, comm:            testhello
CPU: 0    Not tainted  (2.6.28.6-g052ac8e-dirty #10)
PC is at 0xc370
LR is at 0x834d0
pc : [<0000c370>]    lr : [<000834d0>]    psr: 20000010
sp : bef28d38  ip : 0000001c  fp : bef28dac
r10: 00000000  r9 : 00000000  r8 : 00081ff0
r7 : 000824b4  r6 : 00082074  r5 : 00000000  r4 : 00083484
r3 : 00000000  r2 : 0000b6ac  r1 : 00083038  r0 : 00001000
Flags: nzCv  IRQs on  FIQs on  Mode USER_32  ISA ARM  Segment user
Control: 00c5387d  Table: 570e8008  DAC: 00000015
[<c002cd60>] (show_regs+0x0/0x50) from [<c0030ca0>] (__do_user_fault+0x5c/0xa4)
 r4:c7018000
[<c0030c44>] (__do_user_fault+0x0/0xa4) from [<c0030f68>] (do_page_fault+0x204/0x23c)
 r7:c71dc058 r6:c7018000 r5:00000000 r4:00010000
[<c0030d64>] (do_page_fault+0x0/0x23c) from [<c002b250>] (do_DataAbort+0x38/0x98)
[<c002b218>] (do_DataAbort+0x0/0x98) from [<c002bd80>] (ret_from_exception+0x0/0x10)
Exception stack(0xc701dfb0 to 0xc701dff8)
dfa0:                                     00001000 00083038 0000b6ac 00000000
dfc0: 00083484 00000000 00082074 000824b4 00081ff0 00000000 00000000 bef28dac
dfe0: 0000001c bef28d38 000834d0 0000c370 20000010 ffffffff
 r8:00081ff0 r7:000824b4 r6:00082074 r5:00000000 r4:ffffffff
Kernel panic - not syncing: Attempted to kill init!