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 # elif defined(__sparc__)
  13 #  define __NR_bpf 349
  14 # elif defined(__s390__)
  15 #  define __NR_bpf 351
  16 # else
  17 #  error __NR_bpf not defined. libbpf does not support your arch.
  18 # endif
  19 #endif
  20
  21 int main(void)
  22 {
  23         union bpf_attr attr;
  24
  25         /* Check fields in attr */
  26         attr.prog_type = BPF_PROG_TYPE_KPROBE;
  27         attr.insn_cnt = 0;
  28         attr.insns = 0;
  29         attr.license = 0;
  30         attr.log_buf = 0;
  31         attr.log_size = 0;
  32         attr.log_level = 0;
  33         attr.kern_version = 0;
  34         attr.prog_flags = 0;
  35
  36         /*
  37          * Test existence of __NR_bpf and BPF_PROG_LOAD.
  38          * This call should fail if we run the testcase.
  39          */
  40         return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
  41 }