Commit-ID: 63ab024a5b6f295ca17a293ad81b7c728f49a89a Gitweb: http://git.kernel.org/tip/63ab024a5b6f295ca17a293ad81b7c728f49a89a Author: Wang Nan <wangnan0@xxxxxxxxxx> AuthorDate: Mon, 14 Sep 2015 23:02:49 -0300 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Tue, 15 Sep 2015 09:48:33 -0300 perf tools: regs_query_register_offset() infrastructure regs_query_register_offset() is a helper function which converts register name like "%rax" to offset of a register in 'struct pt_regs', which is required by BPF prologue generator. PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET indicates an architecture supports converting name of a register to its offset in 'struct pt_regs'. HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET is introduced as the corresponding CFLAGS of PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET. Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx> Cc: Alexei Starovoitov <ast@xxxxxxxxxxxx> Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx> Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx> Cc: David Ahern <dsahern@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Kaixu Xia <xiakaixu@xxxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Zefan Li <lizefan@xxxxxxxxxx> Cc: pi3orama@xxxxxxx Link: http://lkml.kernel.org/r/1441523623-152703-19-git-send-email-wangnan0@xxxxxxxxxx Signed-off-by: He Kuang <hekuang@xxxxxxxxxx> [ Extracted from eBPF patches ] Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/perf/config/Makefile | 4 ++++ tools/perf/util/include/dwarf-regs.h | 8 ++++++++ 2 files changed, 12 insertions(+) diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index 827557f..0435ac4 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -109,6 +109,10 @@ endif # include ARCH specific config -include $(src-perf)/arch/$(ARCH)/Makefile +ifdef PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET + CFLAGS += -DHAVE_ARCH_REGS_QUERY_REGISTER_OFFSET +endif + include $(src-perf)/config/utilities.mak ifeq ($(call get-executable,$(FLEX)),) diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h index 8f14965..07c644e 100644 --- a/tools/perf/util/include/dwarf-regs.h +++ b/tools/perf/util/include/dwarf-regs.h @@ -5,4 +5,12 @@ const char *get_arch_regstr(unsigned int n); #endif +#ifdef HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET +/* + * Arch should support fetching the offset of a register in pt_regs + * by its name. See kernel's regs_query_register_offset in + * arch/xxx/kernel/ptrace.c. + */ +int regs_query_register_offset(const char *name); +#endif #endif -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|