47 lines
997 B
C
47 lines
997 B
C
#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <asm/pgtable.h>
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static int ptdump_show(struct seq_file *m, void *v)
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{
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ptdump_walk_pgd_level(m, NULL);
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return 0;
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}
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static int ptdump_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, ptdump_show, NULL);
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}
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static const struct file_operations ptdump_fops = {
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.owner = THIS_MODULE,
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.open = ptdump_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct dentry *pe;
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static int __init pt_dump_debug_init(void)
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{
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pe = debugfs_create_file("kernel_page_tables", S_IRUSR, NULL, NULL,
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&ptdump_fops);
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if (!pe)
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return -ENOMEM;
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return 0;
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}
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static void __exit pt_dump_debug_exit(void)
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{
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debugfs_remove_recursive(pe);
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}
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module_init(pt_dump_debug_init);
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module_exit(pt_dump_debug_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
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MODULE_DESCRIPTION("Kernel debugging helper that dumps pagetables");
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