[maemo-developers] qemu 0.10

[From: Cornelius Hald]

----- "Eero Tamminen" <eero.tamminen at nokia.com> wrote:

> Hi,
> 
> ext Cornelius Hald wrote:
> > Relying to myself :) It seems like I found the problem. If I try to
> run the new qemu from inside scratchbox I get this:
> > [sbox-DIABLO_ARMEL: ~] >
> /scratchbox/devkits/cputransp/bin/qemu-arm-0.10
> > /scratchbox/devkits/cputransp/bin/qemu-arm-0.10:
> /scratchbox/host_shared/lib/libc.so.6: version `GLIBC_2.4' not found
> (required by /scratchbox/devkits/cputransp/bin/qemu-arm-0.10)
> > /scratchbox/devkits/cputransp/bin/qemu-arm-0.10:
> /scratchbox/host_shared/lib/libc.so.6: version `GLIBC_2.8' not found
> (required by /scratchbox/devkits/cputransp/bin/qemu-arm-0.10)
> > /scratchbox/devkits/cputransp/bin/qemu-arm-0.10:
> /scratchbox/host_shared/lib/libc.so.6: version `GLIBC_2.3.4' not found
> (required by /scratchbox/devkits/cputransp/bin/qemu-arm-0.10)
> > 
> > So it seems that the problem is the compilation of qemu on the host.
> Because of this qemu has dependencies to different versions of libc6.
> Versions that are not available from inside scratchbox. I'll try to
> fix that...
> 
> Scratchbox is a chroot.  If the libraries you compiled something
> against
> aren't inside the chroot, the binary won't work.
> 
> You need to use the scratchbox host toolchain to compile the tools.
> (SDK installation should include a target for this)

Thanks for the input Eero! I already tried to compiled qemu using the X86 and the HOST target, but the build always failed. Now I compiled a static binary on my host and using that it works somehow.

[sbox-DIABLO_ARMEL: ~] > qemu-arm-0.10 hello
Hello world 

But the problem is now, that if I call the ARM binary directly it looks like it's not really passed as an argument to qemu. Instead qemu is called without arguments, or with wrong arguments. Maybe the arguments are not 100% compatible between 0.9 and 0.10.

sbox-DIABLO_ARMEL: ~] > ./hello 
qemu-arm version 0.10.0, Copyright (c) 2003-2008 Fabrice Bellard
usage: qemu-arm [options] program [arguments...]
Linux CPU emulator (compiled for arm emulation)

Standard options:
-h                print this help
-g port           wait gdb connection to port
-L path           set the elf interpreter prefix (default=/usr/gnemul/qemu-arm)
-s size           set the stack size in bytes (default=524288)
-cpu model        select CPU (-cpu ? for list)
-drop-ld-preload  drop LD_PRELOAD for target process
-E var=value      sets/modifies targets environment variable(s)
-U var            unsets targets environment variable(s)

Debug options:
-d options   activate log (logfile=/tmp/qemu.log)
-p pagesize  set the host page size to 'pagesize'
-strace      log system calls

Environment variables:
QEMU_STRACE       Print system calls and arguments similar to the
                  'strace' program.  Enable by setting to any value.
You can use -E and -U options to set/unset environment variables
for target process.  It is possible to provide several variables
by repeating the option.  For example:
    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG
Note that if you provide several changes to single variable
last change will stay in effect.


Does anyone know where it's defined how the qemu binary is called? 

Thanks again!
Conny