Messages in this thread Patch in this message | | | From | He Kuang <> | Subject | [RFC PATCH v2 03/15] perf bpf: Save pt_regs info from debuginfo | Date | Sun, 24 May 2015 08:27:59 +0000 |
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Save reg number 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 | 13 +++++++++++++ tools/perf/util/probe-event.h | 1 + tools/perf/util/probe-finder.c | 11 +++++++++++ 3 files changed, 25 insertions(+)
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h index 8f14965..566ff6d 100644 --- a/tools/perf/util/include/dwarf-regs.h +++ b/tools/perf/util/include/dwarf-regs.h @@ -2,7 +2,20 @@ #define _PERF_DWARF_REGS_H_ #ifdef HAVE_DWARF_SUPPORT +struct arch_regs_info { + const char *name; /* Architecture dependent register string */ + int offset; /* Reg offset in struct pt_regs */ + int size; /* Reg size */ +}; + +#define ARCH_REGS_INFO(r, pt_reg_name) \ + {.name = r, \ + .offset = offsetof(struct pt_regs, pt_reg_name), \ + .size = sizeof(((struct pt_regs *)0)->pt_reg_name)} \ + const char *get_arch_regstr(unsigned int n); +int get_arch_reg_offset(unsigned int n); +int get_arch_reg_size(unsigned int n); #endif #endif diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index d6b7834..6c19395 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -29,6 +29,7 @@ struct probe_trace_arg { char *value; /* Base value */ char *type; /* Type name */ struct probe_trace_arg_ref *ref; /* Referencing offset */ + unsigned int regn; /* Regn from dwarf */ }; /* 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 ee27b74..681af00 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -159,6 +159,16 @@ static struct probe_trace_arg_ref *alloc_trace_arg_ref(long offs) return ref; } +int __attribute__ ((weak)) +get_arch_reg_offset(unsigned int n __maybe_unused) { + return -1; +} + +int __attribute__ ((weak)) +get_arch_reg_size(unsigned int n __maybe_unused) { + return -1; +} + /* * Convert a location into trace_arg. * If tvar == NULL, this just checks variable can be converted. @@ -260,6 +270,7 @@ static_var: return -ERANGE; } + tvar->regn = regn; tvar->value = strdup(regs); if (tvar->value == NULL) return -ENOMEM; -- 1.8.5.2
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