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>,
Adrian Hunter <adrian.hunter@intel.com>,
David Ahern <dsahern@gmail.com>, Jiri Olsa <jolsa@kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
Wang Nan <wangnan0@huawei.com>
Subject: [PATCH 02/19] objtool: Add fallback from ELF_C_READ_MMAP to ELF_C_READ
Date: Wed, 13 Jul 2016 23:20:38 -0300 [thread overview]
Message-ID: <1468462855-30196-3-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1468462855-30196-1-git-send-email-acme@kernel.org>
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Not all libelf implementations have this "Please, ELF_C_READ, but use
mmap if possible" elf_begin() cmd, so provide a fallback to plain old
ELF_C_READ.
Case in point: Alpine Linux 3.4.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-1fctuknrawgoi5xqon4mu9dv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/objtool/elf.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index e11f6b69cce6..0d7983ac63ef 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -30,6 +30,13 @@
#include "elf.h"
#include "warn.h"
+/*
+ * Fallback for systems without this "read, mmaping if possible" cmd.
+ */
+#ifndef ELF_C_READ_MMAP
+#define ELF_C_READ_MMAP ELF_C_READ
+#endif
+
struct section *find_section_by_name(struct elf *elf, const char *name)
{
struct section *sec;
--
2.7.4
next prev parent reply other threads:[~2016-07-14 2:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-14 2:20 [GIT PULL 00/19] perf/core improvements and fixes Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 01/19] tools: Fix up BITS_PER_LONG setting Arnaldo Carvalho de Melo
2016-07-14 2:20 ` Arnaldo Carvalho de Melo [this message]
2016-07-14 2:20 ` [PATCH 03/19] objtool: Avoid checking code drift on busybox's diff Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 04/19] tools lib bpf: New API to adjust type of a BPF program Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 05/19] tools lib bpf: Report error when kernel doesn't support program type Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 06/19] perf event parser: Add const qualifier to evt_name and sys_name Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 07/19] perf bpf: Rename bpf__foreach_tev() to bpf__foreach_event() Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 08/19] perf bpf: Support BPF program attach to tracepoints Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 09/19] perf probe: Fix to show correct error message for $vars and $params Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 10/19] perf probe: Accept %sdt and %cached event name Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 11/19] perf probe: Make --list show only available cached events Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 12/19] perf probe-cache: Add for_each_probe_cache_entry() wrapper Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 13/19] perf probe: Allow wildcard for cached events Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 14/19] perf probe: Search SDT/cached event from all probe caches Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 15/19] perf list: Show SDT and pre-cached events Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 16/19] perf probe: Support @BUILDID or @FILE suffix for SDT events Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 17/19] perf probe: Support a special SDT probe format Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 18/19] perf build: Add sdt feature detection Arnaldo Carvalho de Melo
2016-07-14 2:20 ` [PATCH 19/19] perf test: Add a test case for SDT event Arnaldo Carvalho de Melo
2016-07-14 6:58 ` [GIT PULL 00/19] perf/core improvements and fixes Ingo Molnar
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