forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.6 KiB
66 lines
1.6 KiB
// 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_t |
|
ikheaders_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");
|
|
|