> -----Original Message----- > From: linaro-toolchain-boun...@lists.linaro.org [mailto:linaro- > toolchain-boun...@lists.linaro.org] On Behalf Of Wookey > Sent: 23 February 2014 20:43 > To: Rob Savoye > Cc: Linaro ToolChain > Subject: Re: [Weekly] 17-21 FEB 2013 > > +++ Rob Savoye [2014-02-23 08:05 -0700]: > > On 02/23/2014 03:09 AM, Alex Bennée wrote: > > > Is this a problem with the emulated shared libraries not loading > (qemu > > > itself should be static)? Wookey did find a problem when built on > older > > > distros as the kernel version (CONFIG_UNAME) passed to the emulated > > > system cause libc to get confused as older kernels don't support > aarch64! > > > > Ah... It works fine on Ubuntu saucy, but not on Ubuntu precise, > which > > is what the build farm machine run. Is there a workaround short of > > upgrading all the TCWG build machines ? > > > > > Debian is carrying a patch that forces the kernel version to be > reported > > > to libc as 3.8. > > Is this a kernel patch or q qemu patch ? > > There is an ubuntu qemu patch which reports later uname on aarch64 > (below). But it turns out that if you build qemu_without_ the configure > option --enable-uname-release then the ubuntu patch is no longer needed > as qemu itself now DTRT (reporting an appropriate minimum uname version > on a per-arch basis).
Can you not achieve the same thing with the -r option on the command line ? i.e. qemu-aarch64 -r 3.7.0 ? Also achievable by : set_board_info sim,options " -r 3.7.0" in your boards file. Ramana > > This was the ubuntu patch to force this: > > Index: qemu-1.7.50+dfsg/linux-user/main.c > =================================================================== > --- qemu-1.7.50+dfsg.orig/linux-user/main.c 2014-02-17 > 15:25:03.000000000 +0000 > +++ qemu-1.7.50+dfsg/linux-user/main.c 2014-02-18 16:23:10.340055485 > +0000 > @@ -69,7 +69,15 @@ > static void usage(void); > > static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; > -const char *qemu_uname_release = CONFIG_UNAME_RELEASE; > + > +/* arm64 glibc requires a kernel with arm64 support. Qemu needs to > report one. */ > +#ifdef TARGET_AARCH64 > +# define UNAME_RELEASE "3.7.0" > +#else > +# define UNAME_RELEASE CONFIG_UNAME_RELEASE > +#endif > + > +const char *qemu_uname_release = UNAME_RELEASE; > > /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so > we allocate a bigger stack. Need a better solution, for example > > Wookey > -- > Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM > http://wookware.org/ > > _______________________________________________ > linaro-toolchain mailing list > linaro-toolchain@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-toolchain -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2548782 _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
