Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Provide kernel headers useful to build tracing programs
4 * such as for running eBPF tracing tools.
5 *
6 * (Borrowed code from kernel/configs.c)
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/kobject.h>
12#include <linux/init.h>
13
14/*
15 * Define kernel_headers_data and kernel_headers_data_end, within which the
16 * compressed kernel headers are stored. The file is first compressed with xz.
17 */
18
19asm (
20" .pushsection .rodata, \"a\" \n"
21" .global kernel_headers_data \n"
22"kernel_headers_data: \n"
23" .incbin \"kernel/kheaders_data.tar.xz\" \n"
24" .global kernel_headers_data_end \n"
25"kernel_headers_data_end: \n"
26" .popsection \n"
27);
28
29extern char kernel_headers_data[];
30extern char kernel_headers_data_end[];
31
32static struct bin_attribute kheaders_attr __ro_after_init =
33 __BIN_ATTR_SIMPLE_RO(kheaders.tar.xz, 0444);
34
35static int __init ikheaders_init(void)
36{
37 kheaders_attr.private = kernel_headers_data;
38 kheaders_attr.size = (kernel_headers_data_end -
39 kernel_headers_data);
40 return sysfs_create_bin_file(kernel_kobj, &kheaders_attr);
41}
42
43static void __exit ikheaders_cleanup(void)
44{
45 sysfs_remove_bin_file(kernel_kobj, &kheaders_attr);
46}
47
48module_init(ikheaders_init);
49module_exit(ikheaders_cleanup);
50
51MODULE_LICENSE("GPL v2");
52MODULE_AUTHOR("Joel Fernandes");
53MODULE_DESCRIPTION("Echo the kernel header artifacts used to build the kernel");