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#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <asm/elf.h>
#include <asm/uaccess.h>
#include "internal.h"
char *task_mem(struct mm_struct *mm, char *buffer)
{
unsigned long data, text, lib;
data = mm->total_vm - mm->shared_vm - mm->stack_vm;
text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
buffer += sprintf(buffer,
"VmSize:\t%8lu kB\n"
"VmLck:\t%8lu kB\n"
"VmRSS:\t%8lu kB\n"
"VmData:\t%8lu kB\n"
"VmStk:\t%8lu kB\n"
"VmExe:\t%8lu kB\n"
"VmLib:\t%8lu kB\n"
"VmPTE:\t%8lu kB\n",
(mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
mm->locked_vm << (PAGE_SHIFT-10),
get_mm_counter(mm, rss) << (PAGE_SHIFT-10),
data << (PAGE_SHIFT-10),
mm->stack_vm << (PAGE_SHIFT-10), text, lib,
(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
return buffer;
}
unsigned long task_vsize(struct mm_struct *mm)
{
return PAGE_SIZE * mm->total_vm;
}
int task_statm(struct mm_struct *mm, int *shared, int *text,
int *data, int *resident)
{
int rss = get_mm_counter(mm, rss);
*shared = rss - get_mm_counter(mm, anon_rss);
*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
>> PAGE_SHIFT;
*data = mm->total_vm - mm->shared_vm;
*resident = rss;
return mm->total_vm;
}
int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
{
struct vm_area_struct * vma;
int result = -ENOENT;
struct task_struct *task = proc_task(inode);
struct mm_struct * mm = get_task_mm(task);
if (!mm)
goto out;
down_read(&mm->mmap_sem);
vma = mm->mmap;
while (vma) {
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
break;
vma = vma->vm_next;
}
if (vma) {
*mnt = mntget(vma->vm_file->f_vfsmnt);
*dentry = dget(vma->vm_file->f_dentry);
result = 0;
}
up_read(&mm->mmap_sem);
mmput(mm);
out:
return result;
}
static void pad_len_spaces(struct seq_file *m, int len)
{
len = 25 + sizeof(void*) * 6 - len;
if (len < 1)
len = 1;
seq_printf(m, "%*c", len, ' ');
}
static int show_map(struct seq_file *m, void *v)
{
struct task_struct *task = m->private;
struct vm_area_struct *map = v;
struct mm_struct *mm = map->vm_mm;
struct file *file = map->vm_file;
int flags = map->vm_flags;
unsigned long ino = 0;
dev_t dev = 0;
int len;
if (file) {
struct inode *inode = map->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",
map->vm_start,
map->vm_end,
flags & VM_READ ? 'r' : '-',
flags & VM_WRITE ? 'w' : '-',
flags & VM_EXEC ? 'x' : '-',
flags & VM_MAYSHARE ? 's' : 'p',
map->vm_pgoff << PAGE_SHIFT,
MAJOR(dev), MINOR(dev), ino, &len);
/*
* Print the dentry name for named mappings, and a
* special [heap] marker for the heap:
*/
if (map->vm_file) {
pad_len_spaces(m, len);
seq_path(m, file->f_vfsmnt, file->f_dentry, "");
} else {
if (mm) {
if (map->vm_start <= mm->start_brk &&
map->vm_end >= mm->brk) {
pad_len_spaces(m, len);
seq_puts(m, "[heap]");
} else {
if (map->vm_start <= mm->start_stack &&
map->vm_end >= mm->start_stack) {
pad_len_spaces(m, len);
seq_puts(m, "[stack]");
}
}
} else {
pad_len_spaces(m, len);
seq_puts(m, "[vdso]");
}
}
seq_putc(m, '\n');
if (m->count < m->size) /* map is copied successfully */
m->version = (map != get_gate_vma(task))? map->vm_start: 0;
return 0;
}
static void *m_start(struct seq_file *m, loff_t *pos)
{
struct task_struct *task = m->private;
unsigned long last_addr = m->version;
struct mm_struct *mm;
struct vm_area_struct *map, *tail_map;
loff_t l = *pos;
/*
* We remember last_addr rather than next_addr to hit with
* mmap_cache most of the time. We have zero last_addr at
* the begining and also after lseek. We will have -1 last_addr
* after the end of the maps.
*/
if (last_addr == -1UL)
return NULL;
mm = get_task_mm(task);
if (!mm)
return NULL;
tail_map = get_gate_vma(task);
down_read(&mm->mmap_sem);
/* Start with last addr hint */
if (last_addr && (map = find_vma(mm, last_addr))) {
map = map->vm_next;
goto out;
}
/*
* Check the map index is within the range and do
* sequential scan until m_index.
*/
map = NULL;
if ((unsigned long)l < mm->map_count) {
map = mm->mmap;
while (l-- && map)
map = map->vm_next;
goto out;
}
if (l != mm->map_count)
tail_map = NULL; /* After gate map */
out:
if (map)
return map;
/* End of maps has reached */
m->version = (tail_map != NULL)? 0: -1UL;
up_read(&mm->mmap_sem);
mmput(mm);
return tail_map;
}
static void m_stop(struct seq_file *m, void *v)
{
struct task_struct *task = m->private;
struct vm_area_struct *map = v;
if (map && map != get_gate_vma(task)) {
struct mm_struct *mm = map->vm_mm;
up_read(&mm->mmap_sem);
mmput(mm);
}
}
static void *m_next(struct seq_file *m, void *v, loff_t *pos)
{
struct task_struct *task = m->private;
struct vm_area_struct *map = v;
struct vm_area_struct *tail_map = get_gate_vma(task);
(*pos)++;
if (map && (map != tail_map) && map->vm_next)
return map->vm_next;
m_stop(m, v);
return (map != tail_map)? tail_map: NULL;
}
struct seq_operations proc_pid_maps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
.show = show_map
};
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