On Tue, Apr 2, 2019 at 4:51 AM Lluis Campos <lluis.cam...@northern.tech> wrote:
>
> Hi all,
>
> This is my very first question in the Yocto mailing list. Very exited!
> Please let me know if I should use other list for this.
>
>
> I am building an image using musl libc instead of gnu libc. I am not
> using yocto-tiny distro, instead I achieve this by setting on my local.conf:
>
> TCLIBC = "musl"
>
>
> My app (mender) got a segfault just starting. See output from strace:
>
> root@raspberrypi3:~# strace mender
> execve("/usr/bin/mender", ["mender"], 0x7ee65e10 /* 13 vars */) = 0
> set_tls(0x76f1bffc) = 0
> set_tid_address(0x76f1bfa0) = 3020
> --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x530bc8} ---
> +++ killed by SIGSEGV +++
> Segmentation fault
>
>
> To be able to debug the process, I added gdb to my image adding to my
> local.conf:
>
> CORE_IMAGE_EXTRA_INSTALL += "packagegroup-core-buildessential
> packagegroup-core-tools-debug"
>
>
> Then, ironically, gdb itself also segfaults:
>
> root@raspberrypi3:~# strace gdb 2>&1 | tail
> fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
> getdents64(3, /* 6 entries */, 2048) = 144
> getdents64(3, /* 0 entries */, 2048) = 0
> close(3) = 0
> ioctl(0, TIOCGWINSZ, {ws_row=25, ws_col=74, ws_xpixel=0, ws_ypixel=0}) = 0
> getcwd("/home/root", 4096) = 11
> access("/usr/local/bin/gdb", X_OK) = -1 ENOENT (No such file or
> directory)
> access("/usr/bin/gdb", X_OK) = 0
> --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x7e35aff0} ---
> +++ killed by SIGSEGV +++
>
>
> So, what is going on here? My guess is that some recipes are being
> wrongly linked with gnu libc instead of musl, and then cannot run in my
> device.
>
> Any ideas on how to debug the issue?
>
We have switched to using PIE by default in last few releases, can you
try master but comment out
require conf/distro/include/security_flags.inc
in your distro conf file.
> Thanks!
>
>
> Lluís Campos
> mender.io
> Northen Tech
>
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> yocto@yoctoproject.org
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