cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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test_xdp_devmap_helpers.c (580B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* fails to load without expected_attach_type = BPF_XDP_DEVMAP
      3 * because of access to egress_ifindex
      4 */
      5#include <linux/bpf.h>
      6#include <bpf/bpf_helpers.h>
      7
      8SEC("xdp")
      9int xdpdm_devlog(struct xdp_md *ctx)
     10{
     11	char fmt[] = "devmap redirect: dev %u -> dev %u len %u\n";
     12	void *data_end = (void *)(long)ctx->data_end;
     13	void *data = (void *)(long)ctx->data;
     14	unsigned int len = data_end - data;
     15
     16	bpf_trace_printk(fmt, sizeof(fmt),
     17			 ctx->ingress_ifindex, ctx->egress_ifindex, len);
     18
     19	return XDP_PASS;
     20}
     21
     22char _license[] SEC("license") = "GPL";