build/feature/test-bpf.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <asm/unistd.h>
0003 #include <linux/bpf.h>
0004 #include <unistd.h>
0005
0006 #ifndef __NR_bpf
0007 # if defined(__i386__)
0008 #  define __NR_bpf 357
0009 # elif defined(__x86_64__)
0010 #  define __NR_bpf 321
0011 # elif defined(__aarch64__)
0012 #  define __NR_bpf 280
0013 # elif defined(__sparc__)
0014 #  define __NR_bpf 349
0015 # elif defined(__s390__)
0016 #  define __NR_bpf 351
0017 # elif defined(__mips__) && defined(_ABIO32)
0018 #  define __NR_bpf 4355
0019 # elif defined(__mips__) && defined(_ABIN32)
0020 #  define __NR_bpf 6319
0021 # elif defined(__mips__) && defined(_ABI64)
0022 #  define __NR_bpf 5315
0023 # else
0024 #  error __NR_bpf not defined. libbpf does not support your arch.
0025 # endif
0026 #endif
0027
0028 int main(void)
0029 {
0030     union bpf_attr attr;
0031
0032     /* Check fields in attr */
0033     attr.prog_type = BPF_PROG_TYPE_KPROBE;
0034     attr.insn_cnt = 0;
0035     attr.insns = 0;
0036     attr.license = 0;
0037     attr.log_buf = 0;
0038     attr.log_size = 0;
0039     attr.log_level = 0;
0040     attr.kern_version = 0;
0041     attr.prog_flags = 0;
0042
0043     /*
0044      * Test existence of __NR_bpf and BPF_PROG_LOAD.
0045      * This call should fail if we run the testcase.
0046      */
0047     return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
0048 }