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authorAndrii Nakryiko <andriin@fb.com>2019-11-27 12:06:50 -0800
committerAlexei Starovoitov <ast@kernel.org>2019-11-27 16:34:21 -0800
commit53f8dd434b6fe666b1c4e0be80a8727e8fa9839f (patch)
treebe37020c2c607328241889de5890eb1ed460a2d7 /tools/perf/MANIFEST
parentb568405856906ee4d9ba6284fd36f2928653a623 (diff)
libbpf: Fix global variable relocation
Similarly to a0d7da26ce86 ("libbpf: Fix call relocation offset calculation bug"), relocations against global variables need to take into account referenced symbol's st_value, which holds offset into a corresponding data section (and, subsequently, offset into internal backing map). For static variables this offset is always zero and data offset is completely described by respective instruction's imm field. Convert a bunch of selftests to global variables. Previously they were relying on `static volatile` trick to ensure Clang doesn't inline static variables, which with global variables is not necessary anymore. Fixes: 393cdfbee809 ("libbpf: Support initialized global variables") Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20191127200651.1381348-1-andriin@fb.com
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