File: test-bpf.c

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// 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
# elif defined(__mips__) && defined(_ABIO32)
#  define __NR_bpf 4355
# elif defined(__mips__) && defined(_ABIN32)
#  define __NR_bpf 6319
# elif defined(__mips__) && defined(_ABI64)
#  define __NR_bpf 5315
# 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;

	/*
	 * bwh: Don't use the bpf() syscall as we might be building on a
	 * much older kernel.  Do "use" the attr structure here to avoid
	 * a "set but not used" warning.
	 */
	(void)&attr;
	return 0;
}