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| author |   Song Shan Gong <gongss@linux.vnet.ibm.com> | 2016-07-21 11:10:51 +0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-26 16:46:12 -0300 |
| commit | 203d8a4aa6edf2c19206316d439ec5dae52ce581 (patch) | |
| tree | 1ac97454a6980ee16075775eee2d979a0dfbd00b /tools/perf/util/machine.h | |
| parent | tools lib bpf: Use official ELF e_machine value (diff) | |
| download | linux-dev-203d8a4aa6edf2c19206316d439ec5dae52ce581.tar.xz linux-dev-203d8a4aa6edf2c19206316d439ec5dae52ce581.zip | |
perf s390: Fix 'start' address of module's map
At present, when creating module's map, perf gets 'start' address by
parsing '/proc/modules', but it's the module base address, it isn't the
start address of the '.text' section.
In most arches, it's OK. But for s390, it places 'GOT' and 'PLT'
relocations before '.text' section. So there exists an offset between
module base address and '.text' section, which will incur wrong symbol
resolution for modules.
Fix this bug by getting 'start' address of module's map from parsing
'/sys/module/[module name]/sections/.text', not from '/proc/modules'.
Signed-off-by: Song Shan Gong <gongss@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1469070651-6447-2-git-send-email-gongss@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/machine.h')
| -rw-r--r-- | tools/perf/util/machine.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h index 41ac9cfd416b..20739f746bc4 100644 --- a/tools/perf/util/machine.h +++ b/tools/perf/util/machine.h @@ -216,6 +216,7 @@ struct symbol *machine__find_kernel_function_by_name(struct machine *machine, struct map *machine__findnew_module_map(struct machine *machine, u64 start, const char *filename); +int arch__fix_module_text_start(u64 *start, const char *name); int __machine__load_kallsyms(struct machine *machine, const char *filename, enum map_type type, bool no_kcore, symbol_filter_t filter); |