1 #include <linux/mm.h>
2 #include <linux/hugetlb.h>
3 #include <linux/mount.h>
4 #include <linux/seq_file.h>
5 #include <asm/elf.h>
6 #include <asm/uaccess.h>
7 #include "internal.h"
8
9 char *task_mem(struct mm_struct *mm, char *buffer)
10 {
11 unsigned long data, text, lib;
12
13 data = mm->total_vm - mm->shared_vm - mm->stack_vm;
14 text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
15 lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
16 buffer += sprintf(buffer,
17 "VmSize:\t%8lu kB\n"
18 "VmLck:\t%8lu kB\n"
19 "VmRSS:\t%8lu kB\n"
20 "VmData:\t%8lu kB\n"
21 "VmStk:\t%8lu kB\n"
22 "VmExe:\t%8lu kB\n"
23 "VmLib:\t%8lu kB\n"
24 "VmPTE:\t%8lu kB\n",
25 (mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
26 mm->locked_vm << (PAGE_SHIFT-10),
27 mm->rss << (PAGE_SHIFT-10),
28 data << (PAGE_SHIFT-10),
29 mm->stack_vm << (PAGE_SHIFT-10), text, lib,
30 (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
31 return buffer;
32 }
33
34 unsigned long task_vsize(struct mm_struct *mm)
35 {
36 return PAGE_SIZE * mm->total_vm;
37 }
38
39 int task_statm(struct mm_struct *mm, int *shared, int *text,
40 int *data, int *resident)
41 {
42 *shared = mm->rss - mm->anon_rss;
43 *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
44 >> PAGE_SHIFT;
45 *data = mm->total_vm - mm->shared_vm;
46 *resident = mm->rss;
47 return mm->total_vm;
48 }
49
50 int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
51 {
52 struct vm_area_struct * vma;
53 int result = -ENOENT;
54 struct task_struct *task = proc_task(inode);
55 struct mm_struct * mm = get_task_mm(task);
56
57 if (!mm)
58 goto out;
59 down_read(&mm->mmap_sem);
60
61 vma = mm->mmap;
62 while (vma) {
63 if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
64 break;
65 vma = vma->vm_next;
66 }
67
68 if (vma) {
69 *mnt = mntget(vma->vm_file->f_vfsmnt);
70 *dentry = dget(vma->vm_file->f_dentry);
71 result = 0;
72 }
73
74 up_read(&mm->mmap_sem);
75 mmput(mm);
76 out:
77 return result;
78 }
79
80 static int show_map(struct seq_file *m, void *v)
81 {
82 struct vm_area_struct *map = v;
83 struct file *file = map->vm_file;
84 int flags = map->vm_flags;
85 unsigned long ino = 0;
86 dev_t dev = 0;
87 int len;
88
89 if (file) {
90 struct inode *inode = map->vm_file->f_dentry->d_inode;
91 dev = inode->i_sb->s_dev;
92 ino = inode->i_ino;
93 }
94
95 seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
96 map->vm_start,
97 map->vm_end,
98 flags & VM_READ ? 'r' : '-',
99 flags & VM_WRITE ? 'w' : '-',
100 flags & VM_EXEC ? 'x' : '-',
101 flags & VM_MAYSHARE ? 's' : 'p',
102 map->vm_pgoff << PAGE_SHIFT,
103 MAJOR(dev), MINOR(dev), ino, &len);
104
105 if (map->vm_file) {
106 len = 25 + sizeof(void*) * 6 - len;
107 if (len < 1)
108 len = 1;
109 seq_printf(m, "%*c", len, ' ');
110 seq_path(m, file->f_vfsmnt, file->f_dentry, "");
111 }
112 seq_putc(m, '\n');
113 return 0;
114 }
115
116 static void *m_start(struct seq_file *m, loff_t *pos)
117 {
118 struct task_struct *task = m->private;
119 struct mm_struct *mm = get_task_mm(task);
120 struct vm_area_struct * map;
121 loff_t l = *pos;
122
123 if (!mm)
124 return NULL;
125
126 down_read(&mm->mmap_sem);
127 map = mm->mmap;
128 while (l-- && map)
129 map = map->vm_next;
130 if (!map) {
131 up_read(&mm->mmap_sem);
132 mmput(mm);
133 if (l == -1)
134 map = get_gate_vma(task);
135 }
136 return map;
137 }
138
139 static void m_stop(struct seq_file *m, void *v)
140 {
141 struct task_struct *task = m->private;
142 struct vm_area_struct *map = v;
143 if (map && map != get_gate_vma(task)) {
144 struct mm_struct *mm = map->vm_mm;
145 up_read(&mm->mmap_sem);
146 mmput(mm);
147 }
148 }
149
150 static void *m_next(struct seq_file *m, void *v, loff_t *pos)
151 {
152 struct task_struct *task = m->private;
153 struct vm_area_struct *map = v;
154 (*pos)++;
155 if (map->vm_next)
156 return map->vm_next;
157 m_stop(m, v);
158 if (map != get_gate_vma(task))
159 return get_gate_vma(task);
160 return NULL;
161 }
162
163 struct seq_operations proc_pid_maps_op = {
164 .start = m_start,
165 .next = m_next,
166 .stop = m_stop,
167 .show = show_map
168 };
169
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