mirror of https://gitee.com/openkylin/linux.git
ac7a75d1fb
'perf probe' uses ref_reloc_sym to adjust symbol offset address from debuginfo address or ref_reloc_sym based address, but that is misusing reloc_sym->addr and reloc_sym->unrelocated_addr. If map is not relocated (map->reloc == 0), we can use reloc_sym->addr as unrelocated address instead of reloc_sym->unrelocated_addr. This usually does not happen. If we have a non-stripped ELF binary, we will use it for map and debuginfo, if not, we use only kallsyms without debuginfo. Thus, the map is always relocated (ELF and DWARF binary) or not relocated (kallsyms). However, if we allow the combination of debuginfo and kallsyms based map (like using debuginfod), we have to check the map->reloc and choose the collect address of reloc_sym. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by: Frank Ch. Eigler <fche@redhat.com> Cc: Aaron Merey <amerey@redhat.com> Cc: Daniel Thompson <daniel.thompson@linaro.org> Link: http://lore.kernel.org/lkml/160041609047.912668.14314639291419159274.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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