// SPDX-License-Identifier: GPL-2.0/* * Provide kernel headers useful to build tracing programs * such as for running eBPF tracing tools. * * (Borrowed code from kernel/configs.c) */ #include <linux/kernel.h>#include <linux/module.h>#include <linux/kobject.h>#include <linux/init.h> /* * Define kernel_headers_data and kernel_headers_data_end, within which the * compressed kernel headers are stored. The file is first compressed with xz. */ asm ("	.pushsection .rodata, \"a\"		\n""	.global kernel_headers_data		\n""kernel_headers_data:				\n""	.incbin \"kernel/kheaders_data.tar.xz\"	\n""	.global kernel_headers_data_end		\n""kernel_headers_data_end:			\n""	.popsection				\n"); extern char kernel_headers_data[];extern char kernel_headers_data_end[]; static ssize_tikheaders_read(struct file *file,  struct kobject *kobj,	       struct bin_attribute *bin_attr,	       char *buf, loff_t off, size_t len){	memcpy(buf, &kernel_headers_data[off], len);	return len;} static struct bin_attribute kheaders_attr __ro_after_init = {	.attr = {		.name = "kheaders.tar.xz",		.mode = 0444,	},	.read = &ikheaders_read,}; static int __init ikheaders_init(void){	kheaders_attr.size = (kernel_headers_data_end -			      kernel_headers_data);	return sysfs_create_bin_file(kernel_kobj, &kheaders_attr);} static void __exit ikheaders_cleanup(void){	sysfs_remove_bin_file(kernel_kobj, &kheaders_attr);} module_init(ikheaders_init);module_exit(ikheaders_cleanup); MODULE_LICENSE("GPL v2");MODULE_AUTHOR("Joel Fernandes");MODULE_DESCRIPTION("Echo the kernel header artifacts used to build the kernel");