diff options
Diffstat (limited to 'tools/build/feature/test-bpf.c')
-rw-r--r-- | tools/build/feature/test-bpf.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/tools/build/feature/test-bpf.c b/tools/build/feature/test-bpf.c new file mode 100644 index 000000000..82070eadf --- /dev/null +++ b/tools/build/feature/test-bpf.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <asm/unistd.h> +#include <linux/bpf.h> +#include <unistd.h> + +#ifndef __NR_bpf +# if defined(__i386__) +# define __NR_bpf 357 +# elif defined(__x86_64__) +# define __NR_bpf 321 +# elif defined(__aarch64__) +# define __NR_bpf 280 +# elif defined(__sparc__) +# define __NR_bpf 349 +# elif defined(__s390__) +# define __NR_bpf 351 +# else +# error __NR_bpf not defined. libbpf does not support your arch. +# endif +#endif + +int main(void) +{ + union bpf_attr attr; + + /* Check fields in attr */ + attr.prog_type = BPF_PROG_TYPE_KPROBE; + attr.insn_cnt = 0; + attr.insns = 0; + attr.license = 0; + attr.log_buf = 0; + attr.log_size = 0; + attr.log_level = 0; + attr.kern_version = 0; + attr.prog_flags = 0; + + /* + * Test existence of __NR_bpf and BPF_PROG_LOAD. + * This call should fail if we run the testcase. + */ + return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr)); +} |