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Age	Commit message (Collapse)	Author	Files	Lines
2022-03-16	selftests/bpf: Test subprog jit when toggle bpf_jit_harden repeatedly	Hou Tao	1	-9/+68
	When bpf_jit_harden is toggled between 0 and 2, subprog jit may fail due to inconsistent twice read values of bpf_jit_harden during jit. So add a test to ensure the problem is fixed. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220309123321.2400262-5-houtao1@huawei.com
2020-11-09	libbpf: Don't attempt to load unused subprog as an entry-point BPF program	Andrii Nakryiko	1	-0/+6
	If BPF code contains unused BPF subprogram and there are no other subprogram calls (which can realistically happen in real-world applications given sufficiently smart Clang code optimizations), libbpf will erroneously assume that subprograms are entry-point programs and will attempt to load them with UNSPEC program type. Fix by not relying on subcall instructions and rather detect it based on the structure of BPF object's sections. Fixes: 9a94f277c4fb ("tools: libbpf: restore the ability to load programs from .text section") Reported-by: Dmitrii Banshchikov <dbanschikov@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20201107000251.256821-1-andrii@kernel.org
2020-09-03	selftests/bpf: Add selftest for multi-prog sections and bpf-to-bpf calls	Andrii Nakryiko	1	-0/+31
	Add a selftest excercising bpf-to-bpf subprogram calls, as well as multiple entry-point BPF programs per section. Also make sure that BPF CO-RE works for such set ups both for sub-programs and for multi-entry sections. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200903203542.15944-8-andriin@fb.com