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.
82 lines
2.0 KiB
82 lines
2.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* kernel/configs.c |
|
* Echo the kernel .config file used to build the kernel |
|
* |
|
* Copyright (C) 2002 Khalid Aziz <[email protected]> |
|
* Copyright (C) 2002 Randy Dunlap <[email protected]> |
|
* Copyright (C) 2002 Al Stone <[email protected]> |
|
* Copyright (C) 2002 Hewlett-Packard Company |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/module.h> |
|
#include <linux/proc_fs.h> |
|
#include <linux/seq_file.h> |
|
#include <linux/init.h> |
|
#include <linux/uaccess.h> |
|
|
|
/* |
|
* "IKCFG_ST" and "IKCFG_ED" are used to extract the config data from |
|
* a binary kernel image or a module. See scripts/extract-ikconfig. |
|
*/ |
|
asm ( |
|
" .pushsection .rodata, \"a\" \n" |
|
" .ascii \"IKCFG_ST\" \n" |
|
" .global kernel_config_data \n" |
|
"kernel_config_data: \n" |
|
" .incbin \"kernel/config_data.gz\" \n" |
|
" .global kernel_config_data_end \n" |
|
"kernel_config_data_end: \n" |
|
" .ascii \"IKCFG_ED\" \n" |
|
" .popsection \n" |
|
); |
|
|
|
#ifdef CONFIG_IKCONFIG_PROC |
|
|
|
extern char kernel_config_data; |
|
extern char kernel_config_data_end; |
|
|
|
static ssize_t |
|
ikconfig_read_current(struct file *file, char __user *buf, |
|
size_t len, loff_t * offset) |
|
{ |
|
return simple_read_from_buffer(buf, len, offset, |
|
&kernel_config_data, |
|
&kernel_config_data_end - |
|
&kernel_config_data); |
|
} |
|
|
|
static const struct proc_ops config_gz_proc_ops = { |
|
.proc_read = ikconfig_read_current, |
|
.proc_lseek = default_llseek, |
|
}; |
|
|
|
static int __init ikconfig_init(void) |
|
{ |
|
struct proc_dir_entry *entry; |
|
|
|
/* create the current config file */ |
|
entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL, |
|
&config_gz_proc_ops); |
|
if (!entry) |
|
return -ENOMEM; |
|
|
|
proc_set_size(entry, &kernel_config_data_end - &kernel_config_data); |
|
|
|
return 0; |
|
} |
|
|
|
static void __exit ikconfig_cleanup(void) |
|
{ |
|
remove_proc_entry("config.gz", NULL); |
|
} |
|
|
|
module_init(ikconfig_init); |
|
module_exit(ikconfig_cleanup); |
|
|
|
#endif /* CONFIG_IKCONFIG_PROC */ |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Randy Dunlap"); |
|
MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel");
|
|
|