From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../selftests/bpf/progs/test_core_reloc_flavors.c | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/test_core_reloc_flavors.c (limited to 'tools/testing/selftests/bpf/progs/test_core_reloc_flavors.c') diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_flavors.c b/tools/testing/selftests/bpf/progs/test_core_reloc_flavors.c new file mode 100644 index 000000000..525acc2f8 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_flavors.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook + +#include +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +struct { + char in[256]; + char out[256]; +} data = {}; + +struct core_reloc_flavors { + int a; + int b; + int c; +}; + +/* local flavor with reversed layout */ +struct core_reloc_flavors___reversed { + int c; + int b; + int a; +}; + +/* local flavor with nested/overlapping layout */ +struct core_reloc_flavors___weird { + struct { + int b; + }; + /* a and c overlap in local flavor, but this should still work + * correctly with target original flavor + */ + union { + int a; + int c; + }; +}; + +#define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src) + +SEC("raw_tracepoint/sys_enter") +int test_core_flavors(void *ctx) +{ + struct core_reloc_flavors *in_orig = (void *)&data.in; + struct core_reloc_flavors___reversed *in_rev = (void *)&data.in; + struct core_reloc_flavors___weird *in_weird = (void *)&data.in; + struct core_reloc_flavors *out = (void *)&data.out; + + /* read a using weird layout */ + if (CORE_READ(&out->a, &in_weird->a)) + return 1; + /* read b using reversed layout */ + if (CORE_READ(&out->b, &in_rev->b)) + return 1; + /* read c using original layout */ + if (CORE_READ(&out->c, &in_orig->c)) + return 1; + + return 0; +} + -- cgit v1.2.3