Merge branch 'support-flex-arrays'

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Andrii Nakryiko says:

====================
Add support for flexible array accesses in a relocatable manner in BPF CO-RE.
It's a typical pattern in C, and kernel in particular, to provide
a fixed-length struct with zero-sized or dimensionless array at the end. In
such cases variable-sized array contents follows immediately after the end of
a struct. This patch set adds support for such access pattern by allowing
accesses to such arrays.

Patch #1 adds libbpf support. Patch #2 adds few test cases for validation.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Alexei Starovoitov 2019-12-15 16:53:51 -08:00

parent 01c6f7aaac 5f2eeceffb

commit 0849e10280

7 changed files with 85 additions and 9 deletions

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34

tools/lib/bpf/libbpf.c

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4

tools/testing/selftests/bpf/prog_tests/core_reloc.c

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3

tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___equiv_zero_sz_arr.c

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3

tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___err_bad_zero_sz_arr.c

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tools/testing/selftests/bpf/progs/btf__core_reloc_arrays___fixed_arr.c

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39

tools/testing/selftests/bpf/progs/core_reloc_types.h

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8

tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c

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