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| author |   Adrian Hunter <adrian.hunter@intel.com> | 2018-05-22 13:54:41 +0300 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-23 10:26:42 -0300 |
| commit | 15acef6c3727cfe0bc9d1f6b273cca46689e8cd8 (patch) | |
| tree | ae91647da62438a064950494acb753a9aa9da28a /tools/perf/util/symbol-elf.c | |
| parent | perf kcore_copy: Calculate offset from phnum (diff) | |
| download | linux-dev-15acef6c3727cfe0bc9d1f6b273cca46689e8cd8.tar.xz linux-dev-15acef6c3727cfe0bc9d1f6b273cca46689e8cd8.zip | |
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>
Diffstat (limited to 'tools/perf/util/symbol-elf.c')
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 25 |
1 files 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, |