tools/build/feature/test-bpf.c

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