Messages in this thread Patch in this message | | | From | He Kuang <> | Subject | [RFC PATCH 3/6] perf bpf: Save pt_regs info from debuginfo | Date | Tue, 5 May 2015 10:10:09 +0000 |
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Save pt_regs number and size information in function convert_variable_location() instead of the register string name, so we can fetch the target register from bpf context register later.
Signed-off-by: He Kuang <hekuang@huawei.com> --- tools/perf/util/include/dwarf-regs.h | 2 ++ tools/perf/util/probe-event.h | 4 ++++ tools/perf/util/probe-finder.c | 11 +++++++++++ 3 files changed, 17 insertions(+)
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h index 8f14965..166bec2 100644 --- a/tools/perf/util/include/dwarf-regs.h +++ b/tools/perf/util/include/dwarf-regs.h @@ -3,6 +3,8 @@ #ifdef HAVE_DWARF_SUPPORT const char *get_arch_regstr(unsigned int n); +char get_arch_pt_regs(unsigned int n); +int get_arch_pt_regs_size(void); #endif #endif diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index d6b7834..842d6c4 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -29,6 +29,10 @@ struct probe_trace_arg { char *value; /* Base value */ char *type; /* Type name */ struct probe_trace_arg_ref *ref; /* Referencing offset */ + unsigned int regn; + unsigned int reg_size; + char *insns; + int insns_cnt; }; /* kprobe-tracer and uprobe-tracer tracing event (point + arg) */ diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 2a76e14..249e6cb 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -159,6 +159,15 @@ static struct probe_trace_arg_ref *alloc_trace_arg_ref(long offs) return ref; } +char __attribute__ ((weak)) get_arch_pt_regs(unsigned int n) { + n = n; + return -1; +} + +int __attribute__ ((weak)) get_arch_pt_regs_size(void) { + return -1; +} + /* * Convert a location into trace_arg. * If tvar == NULL, this just checks variable can be converted. @@ -260,6 +269,8 @@ static_var: return -ERANGE; } + tvar->regn = get_arch_pt_regs(regn); + tvar->reg_size = get_arch_pt_regs_size(); tvar->value = strdup(regs); if (tvar->value == NULL) return -ENOMEM; -- 1.8.5.2
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