[Qemu-devel] problems with emulating native ARM gcc

[Lennert Buytenhek]

Hi,

After setting up binfmt_misc properly, I can now chroot into an ARM
chroot and run most of the binaries in there, apart from things like
mount, for which the corresponding system calls are not implemented.
(And uname is not emulated at all:)

bash-2.05b# uname -a
Linux phi.wantstofly.org 2.6.8-1.521smp #1 SMP Mon Aug 16 09:25:06 EDT 2004 
i686 unknown
bash-2.05b# file /bin/uname
/bin/uname: ELF 32-bit LSB executable, ARM, version 1 (ARM), dynamically linked 
(uses shared libs), stripped
bash-2.05b#


The problem I'm facing right now is that running bigger applications
isn't exactly stable.  Trying to compile a simple hello world program
using a native ARM gcc compiler, it works maybe one in five or six
times or so.

bash-2.05b# cat x.c
#include <stdio.h>

int main()
{
        printf("hello, world!\n");

        return 0;
}
bash-2.05b# gcc -Wall -o x x.c
qemu: uncaught target signal 11 (Segmentation fault) - exiting
collect2: ld returned 245 exit status
bash-2.05b# gcc -Wall -o x x.c
/bin/../lib/gcc-lib/arm-unknown-linux-gnu/3.3.3/cc1: error while loading shared 
libraries: /lib/libc.so.6: undefined symbol: __libc_malloc, version GLIBC_2.0
bash-2.05b# gcc -Wall -o x x.c
qemu: uncaught target signal 11 (Segmentation fault) - exiting
bash-2.05b# gcc -Wall -o x x.c
/bin/../lib/gcc-lib/arm-unknown-linux-gnu/3.3.3/cc1: error while loading shared 
libraries: /lib/libc.so.6: undefined symbol: __libc_malloc, version GLIBC_2.0
bash-2.05b# gcc -Wall -o x x.c
bash-2.05b# ./x
hello, world!
bash-2.05b#

Everything in the chroot is compiled with an arm-unknown-linux-gnu
toolchain, no v5te stuff in there.


cheers,
Lennert