mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
5ab5a3778d
The utility macro from the sysfs core is sufficient to implement this attribute. Make use of it. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20241221-sysfs-const-bin_attr-kheaders-v2-1-8205538aa012@weissschuh.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
// 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");
|