kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2016-09-12	perf probe: Fix dwarf regs table for x86_64	Arnaldo Carvalho de Melo	1	-1/+1
	In 293d5b439483 ("perf probe: Support probing on offline cross-arch binary") DWARF register tables were introduced for many architectures, with the one for the "dx" register being broken for x86_64, which got noticed by the 'perf test bpf' testcase, that has this difference from a successful run to one that fails, with the aforementioned patch: -Writing event: p:perf_bpf_probe/func _text+5197232 f_mode=+68(%di):x32 offset=%si:s64 orig=dx:s32 -Failed to write event: Invalid argument -bpf_probe: failed to apply perf probe eventsFailed to add events selected by BPF +Writing event: p:perf_bpf_probe/func _text+5197232 f_mode=+68(%di):x32 offset=%si:s64 orig=%dx:s32 Add the missing '%' to '%dx' to fix this. Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 293d5b439483 ("perf probe: Support probing on offline cross-arch binary") Link: https://lkml.kernel.org/r/20160909145955.GC32585@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-01	perf probe: Support probing on offline cross-arch binary	Masami Hiramatsu	1	-0/+14
	Support probing on offline cross-architecture binary by adding getting the target machine arch from ELF and choose correct register string for the machine. Here is an example: ----- $ perf probe --vmlinux=./vmlinux-arm --definition 'do_sys_open $params' p:probe/do_sys_open do_sys_open+0 dfd=%r5:s32 filename=%r1:u32 flags=%r6:s32 mode=%r3:u16 ----- Here, we can get probe/do_sys_open from above and append it to to the target machine's tracing/kprobe_events file in the tracefs mountput, usually /sys/kernel/debug/tracing/kprobe_events (or /sys/kernel/tracing/kprobe_events). Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/147214229717.23638.6440579792548044658.stgit@devbox [ Add definition for EM_AARCH64 to fix the build on at least centos 6, debian 7 & ubuntu 12.04.5 ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>