From 293d5b43948309434568f4dcbb36cce4c3c51bd5 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Fri, 26 Aug 2016 01:24:57 +0900 Subject: perf probe: Support probing on offline cross-arch binary 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 Cc: Jiri Olsa Cc: Peter Zijlstra 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 --- tools/perf/arch/powerpc/include/dwarf-regs-table.h | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 tools/perf/arch/powerpc/include/dwarf-regs-table.h (limited to 'tools/perf/arch/powerpc') diff --git a/tools/perf/arch/powerpc/include/dwarf-regs-table.h b/tools/perf/arch/powerpc/include/dwarf-regs-table.h new file mode 100644 index 000000000000..db4730f5585c --- /dev/null +++ b/tools/perf/arch/powerpc/include/dwarf-regs-table.h @@ -0,0 +1,27 @@ +#ifdef DEFINE_DWARF_REGSTR_TABLE +/* This is included in perf/util/dwarf-regs.c */ + +/* + * Reference: + * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html + * http://refspecs.linux-foundation.org/elf/elfspec_ppc.pdf + */ +#define REG_DWARFNUM_NAME(reg, idx) [idx] = "%" #reg + +static const char * const powerpc_regstr_tbl[] = { + "%gpr0", "%gpr1", "%gpr2", "%gpr3", "%gpr4", + "%gpr5", "%gpr6", "%gpr7", "%gpr8", "%gpr9", + "%gpr10", "%gpr11", "%gpr12", "%gpr13", "%gpr14", + "%gpr15", "%gpr16", "%gpr17", "%gpr18", "%gpr19", + "%gpr20", "%gpr21", "%gpr22", "%gpr23", "%gpr24", + "%gpr25", "%gpr26", "%gpr27", "%gpr28", "%gpr29", + "%gpr30", "%gpr31", + REG_DWARFNUM_NAME(msr, 66), + REG_DWARFNUM_NAME(ctr, 109), + REG_DWARFNUM_NAME(link, 108), + REG_DWARFNUM_NAME(xer, 101), + REG_DWARFNUM_NAME(dar, 119), + REG_DWARFNUM_NAME(dsisr, 118), +}; + +#endif -- cgit v1.2.3-55-g7522