From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 02/21] perf probe ppc: Use the right prefix when ignoring SyS symbols on ppc
Date: Mon, 4 May 2015 18:36:11 -0300 [thread overview]
Message-ID: <1430775390-22523-3-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1430775390-22523-1-git-send-email-acme@kernel.org>
From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
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 <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/adf1f98b121ecaf292777fe5cc69fe1038feabce.1430217967.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
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 */
--
2.1.0
next prev parent reply other threads:[~2015-05-04 21:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 21:36 [GIT PULL 00/21] perf/core improvements and fixes Arnaldo Carvalho de Melo
2015-05-04 21:36 ` [PATCH 01/21] perf probe ppc: Fix symbol fixup issues due to ELF type Arnaldo Carvalho de Melo
2015-05-04 21:36 ` Arnaldo Carvalho de Melo [this message]
2015-05-04 21:36 ` [PATCH 03/21] perf probe ppc: Enable matching against dot symbols automatically Arnaldo Carvalho de Melo
2015-05-04 21:36 ` [PATCH 04/21] perf probe ppc64le: Fix ppc64 ABIv2 symbol decoding Arnaldo Carvalho de Melo
2015-05-04 21:36 ` [PATCH 05/21] perf probe ppc64le: Prefer symbol table lookup over DWARF Arnaldo Carvalho de Melo
2015-05-04 21:36 ` [PATCH 06/21] perf probe ppc64le: Fixup function entry if using kallsyms lookup Arnaldo Carvalho de Melo
2015-05-04 21:36 ` [PATCH 12/21] perf probe: Improve detection of file/function name in the probe pattern Arnaldo Carvalho de Melo
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