From: tip-bot for Adrian Hunter <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, luto@kernel.org, joro@8bytes.org,
ak@linux.intel.com, peterz@infradead.org, mingo@kernel.org,
jolsa@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com,
alexander.shishkin@linux.intel.com, acme@redhat.com,
tglx@linutronix.de, adrian.hunter@intel.com
Subject: [tip:perf/core] perf kcore_copy: Layout sections
Date: Wed, 23 May 2018 22:43:23 -0700 [thread overview]
Message-ID: <tip-15acef6c3727cfe0bc9d1f6b273cca46689e8cd8@git.kernel.org> (raw)
In-Reply-To: <1526986485-6562-14-git-send-email-adrian.hunter@intel.com>
Commit-ID: 15acef6c3727cfe0bc9d1f6b273cca46689e8cd8
Gitweb: https://git.kernel.org/tip/15acef6c3727cfe0bc9d1f6b273cca46689e8cd8
Author: Adrian Hunter <adrian.hunter@intel.com>
AuthorDate: Tue, 22 May 2018 13:54:41 +0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 23 May 2018 10:26:42 -0300
perf kcore_copy: Layout sections
In preparation to add more program headers, layout the relative offset
of each section.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1526986485-6562-14-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/symbol-elf.c | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 4aec12102e19..3e76a0efd15c 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1386,6 +1386,7 @@ static off_t kcore__write(struct kcore *kcore)
struct phdr_data {
off_t offset;
+ off_t rel;
u64 addr;
u64 len;
struct list_head node;
@@ -1404,6 +1405,9 @@ struct kcore_copy_info {
struct list_head phdrs;
};
+#define kcore_copy__for_each_phdr(k, p) \
+ list_for_each_entry((p), &(k)->phdrs, node)
+
static int kcore_copy__process_kallsyms(void *arg, const char *name, char type,
u64 start)
{
@@ -1518,11 +1522,21 @@ static int kcore_copy__read_maps(struct kcore_copy_info *kci, Elf *elf)
if (kci->modules_map.len)
list_add_tail(&kci->modules_map.node, &kci->phdrs);
- kci->phnum = !!kci->kernel_map.len + !!kci->modules_map.len;
-
return 0;
}
+static void kcore_copy__layout(struct kcore_copy_info *kci)
+{
+ struct phdr_data *p;
+ off_t rel = 0;
+
+ kcore_copy__for_each_phdr(kci, p) {
+ p->rel = rel;
+ rel += p->len;
+ kci->phnum += 1;
+ }
+}
+
static int kcore_copy__calc_maps(struct kcore_copy_info *kci, const char *dir,
Elf *elf)
{
@@ -1558,7 +1572,12 @@ static int kcore_copy__calc_maps(struct kcore_copy_info *kci, const char *dir,
if (kci->first_module && !kci->last_module_symbol)
return -1;
- return kcore_copy__read_maps(kci, elf);
+ if (kcore_copy__read_maps(kci, elf))
+ return -1;
+
+ kcore_copy__layout(kci);
+
+ return 0;
}
static int kcore_copy__copy_file(const char *from_dir, const char *to_dir,
next prev parent reply other threads:[~2018-05-24 5:44 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 10:54 [PATCH V3 00/17] perf tools and x86 PTI entry trampolines Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 01/17] kallsyms: Simplify update_iter_mod() Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 02/17] kallsyms, x86: Export addresses of syscall trampolines Adrian Hunter
2018-06-05 16:00 ` Andi Kleen
2018-06-06 8:02 ` Adrian Hunter
2018-06-06 10:50 ` Peter Zijlstra
2018-05-22 10:54 ` [PATCH V3 03/17] x86: Add entry trampolines to kcore Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 04/17] perf tools: Add machine__nr_cpus_avail() Adrian Hunter
2018-05-24 5:38 ` [tip:perf/core] perf machine: Add nr_cpus_avail() tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 05/17] perf tools: Workaround missing maps for x86 PTI entry trampolines Adrian Hunter
2018-05-24 5:38 ` [tip:perf/core] perf machine: " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 06/17] perf tools: Fix map_groups__split_kallsyms() for entry trampoline symbols Adrian Hunter
2018-05-24 5:39 ` [tip:perf/core] perf machine: " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 07/17] perf tools: Allow for extra kernel maps Adrian Hunter
2018-05-24 5:39 ` [tip:perf/core] perf machine: " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 08/17] perf tools: Create maps for x86 PTI entry trampolines Adrian Hunter
2018-05-24 5:40 ` [tip:perf/core] perf machine: " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 09/17] perf tools: Synthesize and process mmap events " Adrian Hunter
2018-05-24 5:40 ` [tip:perf/core] perf machine: " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 10/17] perf buildid-cache: kcore_copy: Keep phdr data in a list Adrian Hunter
2018-05-24 5:41 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 11/17] perf buildid-cache: kcore_copy: Keep a count of phdrs Adrian Hunter
2018-05-24 5:42 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 12/17] perf buildid-cache: kcore_copy: Calculate offset from phnum Adrian Hunter
2018-05-24 5:42 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 13/17] perf buildid-cache: kcore_copy: Layout sections Adrian Hunter
2018-05-24 5:43 ` tip-bot for Adrian Hunter [this message]
2018-05-22 10:54 ` [PATCH V3 14/17] perf buildid-cache: kcore_copy: Iterate phdrs Adrian Hunter
2018-05-24 5:43 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 15/17] perf buildid-cache: kcore_copy: Get rid of kernel_map Adrian Hunter
2018-05-24 5:44 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 16/17] perf buildid-cache: kcore_copy: Copy x86 PTI entry trampoline sections Adrian Hunter
2018-05-24 5:44 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-22 10:54 ` [PATCH V3 17/17] perf buildid-cache: kcore_copy: Amend the offset of sections that remap kernel text Adrian Hunter
2018-05-24 5:45 ` [tip:perf/core] perf " tip-bot for Adrian Hunter
2018-05-23 19:35 ` [PATCH V3 00/17] perf tools and x86 PTI entry trampolines Arnaldo Carvalho de Melo
2018-05-24 9:23 ` Adrian Hunter
2018-05-31 12:09 ` Adrian Hunter
2018-06-05 15:29 ` Arnaldo Carvalho de Melo
2018-06-05 16:00 ` Peter Zijlstra
2018-06-05 16:04 ` Arnaldo Carvalho de Melo
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