tools/testing/selftests/bpf/progs/verifier_xdp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Converted from tools/testing/selftests/bpf/verifier/xdp.c */
   3
   4 #include <linux/bpf.h>
   5 #include <bpf/bpf_helpers.h>
   6 #include "bpf_misc.h"
   7
   8 SEC("xdp")
   9 __description("XDP, using ifindex from netdev")
  10 __success __retval(1)
  11 __naked void xdp_using_ifindex_from_netdev(void)
  12 {
  13         asm volatile ("                                 \
  14         r0 = 0;                                         \
  15         r2 = *(u32*)(r1 + %[xdp_md_ingress_ifindex]);   \
  16         if r2 < 1 goto l0_%=;                           \
  17         r0 = 1;                                         \
  18 l0_%=:  exit;                                           \
  19 "       :
  20         : __imm_const(xdp_md_ingress_ifindex, offsetof(struct xdp_md, ingress_ifindex))
  21         : __clobber_all);
  22 }
  23
  24 char _license[] SEC("license") = "GPL";