From: Feng Yang yangfeng@kylinos.cn
The following issue occurs when compiling with clang version 17.0.6, but not with version 18.1.8. Add a version restriction to fix this problem.
progs/compute_live_registers.c:251:3: error: invalid operand for instruction 251 | "r0 = 1;" | ^ <inline asm>:1:22: note: instantiated into assembly here 1 | r0 = 1;r2 = 2;if r1 & 0x7 goto +1;exit;r0 = r2;exit; | ^ 1 error generated.
Fixes: 4a4b84ba9e453 ("selftests/bpf: verify jset handling in CFG computation") Signed-off-by: Feng Yang yangfeng@kylinos.cn --- tools/testing/selftests/bpf/progs/compute_live_registers.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/compute_live_registers.c b/tools/testing/selftests/bpf/progs/compute_live_registers.c index 6884ab99a421..56aec43f206f 100644 --- a/tools/testing/selftests/bpf/progs/compute_live_registers.c +++ b/tools/testing/selftests/bpf/progs/compute_live_registers.c @@ -240,6 +240,7 @@ __naked void if2(void) ::: __clobber_all); }
+#if __clang_major__ >= 18 /* Verifier misses that r2 is alive if jset is not handled properly */ SEC("socket") __log_level(2) @@ -255,6 +256,7 @@ __naked void if3_jset_bug(void) "exit;" ::: __clobber_all); } +#endif
SEC("socket") __log_level(2)