// 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 struct bin_attribute kheaders_attr __ro_after_init = __BIN_ATTR_SIMPLE_RO(kheaders.tar.xz, 0444); static int __init ikheaders_init(void) { kheaders_attr.private = kernel_headers_data; 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");