Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965592AbbD1MGX (ORCPT ); Tue, 28 Apr 2015 08:06:23 -0400 Received: from e28smtp06.in.ibm.com ([122.248.162.6]:54875 "EHLO e28smtp06.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965345AbbD1MGT (ORCPT ); Tue, 28 Apr 2015 08:06:19 -0400 From: "Naveen N. Rao" To: acme@kernel.org Cc: masami.hiramatsu.pt@hitachi.com, ananth@in.ibm.com, mpe@ellerman.id.au, sukadev@linux.vnet.ibm.com, srikar@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3 3/7] perf probe/ppc: Use the right prefix when ignoring SyS symbols on ppc Date: Tue, 28 Apr 2015 17:35:36 +0530 Message-Id: X-Mailer: git-send-email 2.3.5 In-Reply-To: References: In-Reply-To: References: X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15042812-0021-0000-0000-000004EACB1C Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3253 Lines: 104 Use the proper prefix when ignoring SyS symbols on ppc ABIv1. While at it, generalize symbol selection so architectures can implement their own logic. Signed-off-by: Naveen N. Rao Reviewed-by: Srikar Dronamraju --- Changes: - Move logic to arch helper. tools/perf/arch/powerpc/util/sym-handling.c | 20 ++++++++++++++++++++ tools/perf/util/symbol.c | 21 ++++++++++++--------- tools/perf/util/symbol.h | 5 +++++ 3 files changed, 37 insertions(+), 9 deletions(-) diff --git a/tools/perf/arch/powerpc/util/sym-handling.c b/tools/perf/arch/powerpc/util/sym-handling.c index c9de001..5522a40 100644 --- a/tools/perf/arch/powerpc/util/sym-handling.c +++ b/tools/perf/arch/powerpc/util/sym-handling.c @@ -17,3 +17,23 @@ bool elf__needs_adjust_symbols(GElf_Ehdr ehdr) ehdr.e_type == ET_DYN; } #endif + +#if !defined(_CALL_ELF) || _CALL_ELF != 2 +int arch__choose_best_symbol(struct symbol *syma, + struct symbol *symb __maybe_unused) +{ + char *sym = syma->name; + + /* Skip over any initial dot */ + if (*sym == '.') + sym++; + + /* Avoid "SyS" kernel syscall aliases */ + if (strlen(sym) >= 3 && !strncmp(sym, "SyS", 3)) + return SYMBOL_B; + if (strlen(sym) >= 10 && !strncmp(sym, "compat_SyS", 10)) + return SYMBOL_B; + + return SYMBOL_A; +} +#endif diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 201f6c4c..f805757 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -85,8 +85,17 @@ static int prefix_underscores_count(const char *str) return tail - str; } -#define SYMBOL_A 0 -#define SYMBOL_B 1 +int __weak arch__choose_best_symbol(struct symbol *syma, + struct symbol *symb __maybe_unused) +{ + /* Avoid "SyS" kernel syscall aliases */ + if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3)) + return SYMBOL_B; + if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10)) + return SYMBOL_B; + + return SYMBOL_A; +} static int choose_best_symbol(struct symbol *syma, struct symbol *symb) { @@ -134,13 +143,7 @@ static int choose_best_symbol(struct symbol *syma, struct symbol *symb) else if (na < nb) return SYMBOL_B; - /* Avoid "SyS" kernel syscall aliases */ - if (na >= 3 && !strncmp(syma->name, "SyS", 3)) - return SYMBOL_B; - if (na >= 10 && !strncmp(syma->name, "compat_SyS", 10)) - return SYMBOL_B; - - return SYMBOL_A; + return arch__choose_best_symbol(syma, symb); } void symbols__fixup_duplicate(struct rb_root *symbols) diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 8cb0af4..bd50ba0 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -307,4 +307,9 @@ int setup_intlist(struct intlist **list, const char *list_str, bool elf__needs_adjust_symbols(GElf_Ehdr ehdr); #endif +#define SYMBOL_A 0 +#define SYMBOL_B 1 + +int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb); + #endif /* __PERF_SYMBOL */ -- 2.3.5 -- 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/