Quelle  verifier_xdp.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/xdp.c */

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

SEC("xdp")
__description("XDP, using ifindex from netdev")
__success __retval(1)
__naked void xdp_using_ifindex_from_netdev(void)
{
 asm volatile (" \
 r0 = 0;      \
 r2 = *(u32*)(r1 + %[xdp_md_ingress_ifindex]); \
 if r2 < 1 goto l0_%=;    \
 r0 = 1;      \
l0_%=: exit;      \
" :
 : __imm_const(xdp_md_ingress_ifindex, offsetof(struct xdp_md, ingress_ifindex))
 : __clobber_all);
}

char _license[] SEC("license") = "GPL";