----- On May 28, 2020, at 7:51 AM, lttng-dev lttng-dev@lists.lttng.org wrote:
> Hello, > > First - of all: thank you very much for efforts to develop and > maintain LTTng. It's very useful tool! > I used it so far on PowerPC targets and now I try to run it on ARM: > Cyclone5 ARMv7 CPU. > > When trying to run LTTng I get: > > # lttng list --kernel > [ 2012.822578] lttng_lib_ring_buffer: section 24 reloc 0 sym '': > relocation 42 out of range (0x7f05827c -> 0xc0cd7358) > Error: Unable to list kernel events: Kernel tracer not available > Error: Command error > > Do you have any hints how to fix it? Hrm, there is very little handcrafted assembly within the lttng_lib_ring_buffer.ko module. Especially not large chunks of handcrafted assembly. I suspect a compiler issue. >From a freshly booted system, if you issue "modprobe lttng_lib_ring_buffer", so you get the same error ? Also, what is your exact compiler version ? Thanks, Mathieu > > I found https://bugs.lttng.org/issues/1173 but enabling > CONFIG_ARM_MODULE_PLTS did not help. > > I use LTTng from Yocto 3.0.2 with custom kernel 4.14.134-rt63-rt: > > # lttng -V > lttng (LTTng Trace Control) 2.10.7 - KeKriek > > All options recommended from documentation are enabled: > root@cyclone5:~# zcat /proc/config.gz | grep -i modules > CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" > CONFIG_MODULES_USE_ELF_REL=y > CONFIG_MODULES=y > CONFIG_MODULES_TREE_LOOKUP=y > # Xtables combined modules > # User Modules And Translation Layers > root@cyclone5:~# zcat /proc/config.gz | grep -i kallsyms > CONFIG_KALLSYMS=y > # CONFIG_KALLSYMS_ABSOLUTE_PERCPU is not set > CONFIG_KALLSYMS_BASE_RELATIVE=y > root@cyclone5:~# zcat /proc/config.gz | grep -i high_res_timers > CONFIG_HIGH_RES_TIMERS=y > root@cyclone5:~# zcat /proc/config.gz | grep -i tracepoints > CONFIG_TRACEPOINTS=y > CONFIG_HAVE_SYSCALL_TRACEPOINTS=y > > Thank you in advance! > > Best regards, > Lukasz > _______________________________________________ > lttng-dev mailing list > lttng-dev@lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
