selftests/bpf: Add global variables linking selftest

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Add selftest validating various aspects of statically linking global
variables:
  - correct resolution of extern variables across .bss, .data, and .rodata
    sections;
  - correct handling of weak definitions;
  - correct de-duplication of repeating special externs (.kconfig, .ksyms).

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210423181348.1801389-17-andrii@kernel.org

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This commit is contained in:

Andrii Nakryiko 2021-04-23 11:13:46 -07:00 • committed by Alexei Starovoitov

parent f2644fb44d

commit 14f1aae17e

4 changed files with 154 additions and 1 deletions

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3

tools/testing/selftests/bpf/Makefile

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43

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

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tools/testing/selftests/bpf/progs/linked_vars1.c

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tools/testing/selftests/bpf/progs/linked_vars2.c

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