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| author | Adrian Hunter <adrian.hunter@intel.com> | 2018-05-22 13:54:39 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-23 10:26:41 -0300 |
| commit | 6e97957d3d30552c415292bb08a0e5f3c459c027 (patch) | |
| tree | 0352d518520e1b2e307c2a6a40cc5051a6556cad /tools | |
| parent | f6838209484d5cfb368ca5c61d150cc4054eef59 (diff) | |
| download | talos-op-linux-6e97957d3d30552c415292bb08a0e5f3c459c027.tar.gz talos-op-linux-6e97957d3d30552c415292bb08a0e5f3c459c027.zip | |
perf kcore_copy: Keep a count of phdrs
In preparation to add more program headers, keep a count of phdrs.
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/1526986485-6562-12-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index b13873a6f368..4e7b71e8ac0e 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -1398,6 +1398,7 @@ struct kcore_copy_info { u64 last_symbol; u64 first_module; u64 last_module_symbol; + size_t phnum; struct phdr_data kernel_map; struct phdr_data modules_map; struct list_head phdrs; @@ -1517,6 +1518,8 @@ 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; } @@ -1678,7 +1681,6 @@ int kcore_copy(const char *from_dir, const char *to_dir) { struct kcore kcore; struct kcore extract; - size_t count = 2; int idx = 0, err = -1; off_t offset = page_size, sz, modules_offset = 0; struct kcore_copy_info kci = { .stext = 0, }; @@ -1705,10 +1707,7 @@ int kcore_copy(const char *from_dir, const char *to_dir) if (kcore__init(&extract, extract_filename, kcore.elfclass, false)) goto out_kcore_close; - if (!kci.modules_map.addr) - count -= 1; - - if (kcore__copy_hdr(&kcore, &extract, count)) + if (kcore__copy_hdr(&kcore, &extract, kci.phnum)) goto out_extract_close; if (kcore__add_phdr(&extract, idx++, offset, kci.kernel_map.addr, |
