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selftests/bpf: Fix kprobe_multi test.

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When compiler emits endbr insn the function address could
be different than what bpf_get_func_ip() reports.
This is a short term workaround.
bpf_get_func_ip() will be fixed later.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alexei Starovoitov 2022-03-21 21:54:19 -07:00
parent 4e8ca13440
commit 7f0059b58f
1 changed files with 3 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
tools/testing/selftests/bpf/progs/kprobe_multi.c
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@ -36,13 +36,15 @@ __u64 kretprobe_test6_result = 0;
__u64 kretprobe_test7_result = 0;
__u64 kretprobe_test8_result = 0;
extern bool CONFIG_X86_KERNEL_IBT __kconfig __weak;
static void kprobe_multi_check(void *ctx, bool is_return)
{
if (bpf_get_current_pid_tgid() >> 32 != pid)
return;
__u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0;
__u64 addr = bpf_get_func_ip(ctx);
__u64 addr = bpf_get_func_ip(ctx) - (CONFIG_X86_KERNEL_IBT ? 4 : 0);
#define SET(__var, __addr, __cookie) ({ \
if (((const void *) addr == __addr) && \