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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283// 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 <khalid_aziz@hp.com> * Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net> * Copyright (C) 2002 Al Stone <ahs3@fc.hp.com> * 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_tikconfig_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");