From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- fs/proc/nommu.c | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 fs/proc/nommu.c (limited to 'fs/proc/nommu.c') diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c new file mode 100644 index 00000000000..f3bf016d5ee --- /dev/null +++ b/fs/proc/nommu.c @@ -0,0 +1,135 @@ +/* nommu.c: mmu-less memory info files + * + * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "internal.h" + +/* + * display a list of all the VMAs the kernel knows about + * - nommu kernals have a single flat list + */ +static int nommu_vma_list_show(struct seq_file *m, void *v) +{ + struct vm_area_struct *vma; + unsigned long ino = 0; + struct file *file; + dev_t dev = 0; + int flags, len; + + vma = rb_entry((struct rb_node *) v, struct vm_area_struct, vm_rb); + + flags = vma->vm_flags; + file = vma->vm_file; + + if (file) { + struct inode *inode = vma->vm_file->f_dentry->d_inode; + dev = inode->i_sb->s_dev; + ino = inode->i_ino; + } + + seq_printf(m, + "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n", + vma->vm_start, + vma->vm_end, + flags & VM_READ ? 'r' : '-', + flags & VM_WRITE ? 'w' : '-', + flags & VM_EXEC ? 'x' : '-', + flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', + vma->vm_pgoff << PAGE_SHIFT, + MAJOR(dev), MINOR(dev), ino, &len); + + if (file) { + len = 25 + sizeof(void *) * 6 - len; + if (len < 1) + len = 1; + seq_printf(m, "%*c", len, ' '); + seq_path(m, file->f_vfsmnt, file->f_dentry, ""); + } + + seq_putc(m, '\n'); + return 0; +} + +static void *nommu_vma_list_start(struct seq_file *m, loff_t *_pos) +{ + struct rb_node *_rb; + loff_t pos = *_pos; + void *next = NULL; + + down_read(&nommu_vma_sem); + + for (_rb = rb_first(&nommu_vma_tree); _rb; _rb = rb_next(_rb)) { + if (pos == 0) { + next = _rb; + break; + } + } + + return next; +} + +static void nommu_vma_list_stop(struct seq_file *m, void *v) +{ + up_read(&nommu_vma_sem); +} + +static void *nommu_vma_list_next(struct seq_file *m, void *v, loff_t *pos) +{ + (*pos)++; + return rb_next((struct rb_node *) v); +} + +static struct seq_operations proc_nommu_vma_list_seqop = { + .start = nommu_vma_list_start, + .next = nommu_vma_list_next, + .stop = nommu_vma_list_stop, + .show = nommu_vma_list_show +}; + +static int proc_nommu_vma_list_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &proc_nommu_vma_list_seqop); +} + +static struct file_operations proc_nommu_vma_list_operations = { + .open = proc_nommu_vma_list_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static int __init proc_nommu_init(void) +{ + create_seq_entry("maps", S_IRUGO, &proc_nommu_vma_list_operations); + return 0; +} + +module_init(proc_nommu_init); -- cgit v1.2.3-70-g09d2