Release 4.14 tools/build/feature/test-bpf.c

// 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));
}
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Wang Nan
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1
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Directory: tools/build/feature

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