File: trace_dummy_st_ops.c

package info (click to toggle)
linux 6.1.139-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,495,880 kB
  • sloc: ansic: 23,469,452; asm: 266,614; sh: 110,522; makefile: 49,887; python: 36,990; perl: 36,834; cpp: 6,056; yacc: 4,908; lex: 2,725; awk: 1,440; ruby: 25; sed: 5
file content (21 lines) | stat: -rw-r--r-- 476 bytes parent folder | download | duplicates (17) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>

int val = 0;

SEC("fentry/test_1")
int BPF_PROG(fentry_test_1, __u64 *st_ops_ctx)
{
	__u64 state;

	/* Read the traced st_ops arg1 which is a pointer */
	bpf_probe_read_kernel(&state, sizeof(__u64), (void *)st_ops_ctx);
	/* Read state->val */
	bpf_probe_read_kernel(&val, sizeof(__u32), (void *)state);

	return 0;
}

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