Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751478AbbEXIaO (ORCPT ); Sun, 24 May 2015 04:30:14 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:1552 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750925AbbEXI2h (ORCPT ); Sun, 24 May 2015 04:28:37 -0400 From: He Kuang To: , , , , , , , , , , , CC: , Subject: [RFC PATCH v2 03/15] perf bpf: Save pt_regs info from debuginfo Date: Sun, 24 May 2015 08:27:59 +0000 Message-ID: <1432456091-73384-4-git-send-email-hekuang@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1432456091-73384-1-git-send-email-hekuang@huawei.com> References: <1432456091-73384-1-git-send-email-hekuang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.197.210] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2708 Lines: 85 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 --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/