diff options
| author | Andrii Nakryiko <andriin@fb.com> | 2019-11-27 12:06:50 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-27 16:34:21 -0800 |
| commit | 53f8dd434b6fe666b1c4e0be80a8727e8fa9839f (patch) | |
| tree | be37020c2c607328241889de5890eb1ed460a2d7 /tools/testing/selftests/bpf/progs/fentry_test.c | |
| parent | b568405856906ee4d9ba6284fd36f2928653a623 (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
Diffstat (limited to 'tools/testing/selftests/bpf/progs/fentry_test.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/fentry_test.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/tools/testing/selftests/bpf/progs/fentry_test.c b/tools/testing/selftests/bpf/progs/fentry_test.c index d2af9f039df5..615f7c6bca77 100644 --- a/tools/testing/selftests/bpf/progs/fentry_test.c +++ b/tools/testing/selftests/bpf/progs/fentry_test.c @@ -6,28 +6,28 @@ char _license[] SEC("license") = "GPL"; -static volatile __u64 test1_result; +__u64 test1_result = 0; BPF_TRACE_1("fentry/bpf_fentry_test1", test1, int, a) { test1_result = a == 1; return 0; } -static volatile __u64 test2_result; +__u64 test2_result = 0; BPF_TRACE_2("fentry/bpf_fentry_test2", test2, int, a, __u64, b) { test2_result = a == 2 && b == 3; return 0; } -static volatile __u64 test3_result; +__u64 test3_result = 0; BPF_TRACE_3("fentry/bpf_fentry_test3", test3, char, a, int, b, __u64, c) { test3_result = a == 4 && b == 5 && c == 6; return 0; } -static volatile __u64 test4_result; +__u64 test4_result = 0; BPF_TRACE_4("fentry/bpf_fentry_test4", test4, void *, a, char, b, int, c, __u64, d) { @@ -35,7 +35,7 @@ BPF_TRACE_4("fentry/bpf_fentry_test4", test4, return 0; } -static volatile __u64 test5_result; +__u64 test5_result = 0; BPF_TRACE_5("fentry/bpf_fentry_test5", test5, __u64, a, void *, b, short, c, int, d, __u64, e) { @@ -44,7 +44,7 @@ BPF_TRACE_5("fentry/bpf_fentry_test5", test5, return 0; } -static volatile __u64 test6_result; +__u64 test6_result = 0; BPF_TRACE_6("fentry/bpf_fentry_test6", test6, __u64, a, void *, b, short, c, int, d, void *, e, __u64, f) { |