root/tools/build/feature/test-bpf.c

DEFINITIONS

1. main

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <asm/unistd.h>
   3 #include <linux/bpf.h>
   4 #include <unistd.h>
   5 
   6 #ifndef __NR_bpf
   7 # if defined(__i386__)
   8 #  define __NR_bpf 357
   9 # elif defined(__x86_64__)
  10 #  define __NR_bpf 321
  11 # elif defined(__aarch64__)
  12 #  define __NR_bpf 280
  13 # elif defined(__sparc__)
  14 #  define __NR_bpf 349
  15 # elif defined(__s390__)
  16 #  define __NR_bpf 351
  17 # else
  18 #  error __NR_bpf not defined. libbpf does not support your arch.
  19 # endif
  20 #endif
  21 
  22 int main(void)
  23 {
  24         union bpf_attr attr;
  25 
  26         /* Check fields in attr */
  27         attr.prog_type = BPF_PROG_TYPE_KPROBE;
  28         attr.insn_cnt = 0;
  29         attr.insns = 0;
  30         attr.license = 0;
  31         attr.log_buf = 0;
  32         attr.log_size = 0;
  33         attr.log_level = 0;
  34         attr.kern_version = 0;
  35         attr.prog_flags = 0;
  36 
  37         /*
  38          * Test existence of __NR_bpf and BPF_PROG_LOAD.
  39          * This call should fail if we run the testcase.
  40          */
  41         return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
  42 }