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authorAdrian Hunter <adrian.hunter@intel.com>2018-05-22 13:54:40 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-05-23 10:26:41 -0300
commitc9dd1d894958b81a329ec01e7dd03b92eca52789 (patch)
tree3e3a525a6579c3cb9b5ba7330c9ca89903cd6596 /tools/perf/util/symbol-elf.c
parent6e97957d3d30552c415292bb08a0e5f3c459c027 (diff)
downloadlinux-c9dd1d894958b81a329ec01e7dd03b92eca52789.tar.bz2
perf kcore_copy: Calculate offset from phnum
In preparation to add more program headers, calculate offset from the number 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/1526986485-6562-13-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.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 4e7b71e8ac0e..4aec12102e19 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1682,7 +1682,7 @@ int kcore_copy(const char *from_dir, const char *to_dir)
struct kcore kcore;
struct kcore extract;
int idx = 0, err = -1;
- off_t offset = page_size, sz, modules_offset = 0;
+ off_t offset, sz, modules_offset = 0;
struct kcore_copy_info kci = { .stext = 0, };
char kcore_filename[PATH_MAX];
char extract_filename[PATH_MAX];
@@ -1710,6 +1710,10 @@ int kcore_copy(const char *from_dir, const char *to_dir)
if (kcore__copy_hdr(&kcore, &extract, kci.phnum))
goto out_extract_close;
+ offset = gelf_fsize(extract.elf, ELF_T_EHDR, 1, EV_CURRENT) +
+ gelf_fsize(extract.elf, ELF_T_PHDR, kci.phnum, EV_CURRENT);
+ offset = round_up(offset, page_size);
+
if (kcore__add_phdr(&extract, idx++, offset, kci.kernel_map.addr,
kci.kernel_map.len))
goto out_extract_close;