selftests/bpf: Test trampolines on more BPF functions with stack args

Add two functions to the BPF target program of the int128_tgt_prog test.

callee_split() takes a struct holding an __int128 after five u64s, so
on x86-64 it is passed split between r9 and the stack. fentry and fexit
programs check that the trampoline takes it from there and hands it back
there.

callee_unreliable() takes six u64-sized arguments, the first a plain
pointer, which makes its BTF unreliable while the sixth is still passed
on the stack. The new tgt_prog_unreliable subtest checks that an fentry
program cannot be attached to it.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20261016183125.1136468-1-yonghong.song@linux.dev

0 files changed, 0 insertions, 0 deletions