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Message-Id: <1526986485-6562-14-git-send-email-adrian.hunter@intel.com>
Date: Tue, 22 May 2018 13:54:41 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Andy Lutomirski <luto@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Joerg Roedel <joro@...tes.org>, Jiri Olsa <jolsa@...hat.com>,
linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH V3 13/17] perf buildid-cache: 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@...el.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,
--
1.9.1
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