mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 13:16:39 +07:00
1da177e4c3
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!
236 lines
5.3 KiB
C
236 lines
5.3 KiB
C
#include <linux/mm.h>
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#include <linux/hugetlb.h>
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#include <linux/mount.h>
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#include <linux/seq_file.h>
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#include <asm/elf.h>
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#include <asm/uaccess.h>
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#include "internal.h"
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char *task_mem(struct mm_struct *mm, char *buffer)
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{
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unsigned long data, text, lib;
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data = mm->total_vm - mm->shared_vm - mm->stack_vm;
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text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
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lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
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buffer += sprintf(buffer,
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"VmSize:\t%8lu kB\n"
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"VmLck:\t%8lu kB\n"
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"VmRSS:\t%8lu kB\n"
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"VmData:\t%8lu kB\n"
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"VmStk:\t%8lu kB\n"
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"VmExe:\t%8lu kB\n"
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"VmLib:\t%8lu kB\n"
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"VmPTE:\t%8lu kB\n",
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(mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
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mm->locked_vm << (PAGE_SHIFT-10),
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get_mm_counter(mm, rss) << (PAGE_SHIFT-10),
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data << (PAGE_SHIFT-10),
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mm->stack_vm << (PAGE_SHIFT-10), text, lib,
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(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
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return buffer;
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}
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unsigned long task_vsize(struct mm_struct *mm)
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{
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return PAGE_SIZE * mm->total_vm;
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}
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int task_statm(struct mm_struct *mm, int *shared, int *text,
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int *data, int *resident)
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{
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int rss = get_mm_counter(mm, rss);
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*shared = rss - get_mm_counter(mm, anon_rss);
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*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
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>> PAGE_SHIFT;
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*data = mm->total_vm - mm->shared_vm;
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*resident = rss;
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return mm->total_vm;
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}
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int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
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{
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struct vm_area_struct * vma;
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int result = -ENOENT;
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struct task_struct *task = proc_task(inode);
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struct mm_struct * mm = get_task_mm(task);
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if (!mm)
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goto out;
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down_read(&mm->mmap_sem);
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vma = mm->mmap;
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while (vma) {
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if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
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break;
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vma = vma->vm_next;
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}
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if (vma) {
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*mnt = mntget(vma->vm_file->f_vfsmnt);
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*dentry = dget(vma->vm_file->f_dentry);
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result = 0;
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}
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up_read(&mm->mmap_sem);
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mmput(mm);
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out:
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return result;
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}
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static void pad_len_spaces(struct seq_file *m, int len)
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{
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len = 25 + sizeof(void*) * 6 - len;
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if (len < 1)
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len = 1;
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seq_printf(m, "%*c", len, ' ');
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}
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static int show_map(struct seq_file *m, void *v)
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{
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struct task_struct *task = m->private;
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struct vm_area_struct *map = v;
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struct mm_struct *mm = map->vm_mm;
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struct file *file = map->vm_file;
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int flags = map->vm_flags;
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unsigned long ino = 0;
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dev_t dev = 0;
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int len;
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if (file) {
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struct inode *inode = map->vm_file->f_dentry->d_inode;
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dev = inode->i_sb->s_dev;
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ino = inode->i_ino;
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}
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seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
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map->vm_start,
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map->vm_end,
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flags & VM_READ ? 'r' : '-',
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flags & VM_WRITE ? 'w' : '-',
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flags & VM_EXEC ? 'x' : '-',
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flags & VM_MAYSHARE ? 's' : 'p',
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map->vm_pgoff << PAGE_SHIFT,
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MAJOR(dev), MINOR(dev), ino, &len);
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/*
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* Print the dentry name for named mappings, and a
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* special [heap] marker for the heap:
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*/
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if (map->vm_file) {
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pad_len_spaces(m, len);
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seq_path(m, file->f_vfsmnt, file->f_dentry, "");
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} else {
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if (mm) {
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if (map->vm_start <= mm->start_brk &&
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map->vm_end >= mm->brk) {
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pad_len_spaces(m, len);
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seq_puts(m, "[heap]");
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} else {
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if (map->vm_start <= mm->start_stack &&
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map->vm_end >= mm->start_stack) {
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pad_len_spaces(m, len);
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seq_puts(m, "[stack]");
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}
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}
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} else {
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pad_len_spaces(m, len);
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seq_puts(m, "[vdso]");
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}
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}
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seq_putc(m, '\n');
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if (m->count < m->size) /* map is copied successfully */
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m->version = (map != get_gate_vma(task))? map->vm_start: 0;
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return 0;
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}
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static void *m_start(struct seq_file *m, loff_t *pos)
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{
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struct task_struct *task = m->private;
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unsigned long last_addr = m->version;
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struct mm_struct *mm;
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struct vm_area_struct *map, *tail_map;
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loff_t l = *pos;
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/*
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* We remember last_addr rather than next_addr to hit with
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* mmap_cache most of the time. We have zero last_addr at
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* the begining and also after lseek. We will have -1 last_addr
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* after the end of the maps.
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*/
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if (last_addr == -1UL)
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return NULL;
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mm = get_task_mm(task);
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if (!mm)
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return NULL;
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tail_map = get_gate_vma(task);
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down_read(&mm->mmap_sem);
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/* Start with last addr hint */
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if (last_addr && (map = find_vma(mm, last_addr))) {
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map = map->vm_next;
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goto out;
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}
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/*
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* Check the map index is within the range and do
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* sequential scan until m_index.
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*/
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map = NULL;
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if ((unsigned long)l < mm->map_count) {
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map = mm->mmap;
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while (l-- && map)
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map = map->vm_next;
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goto out;
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}
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if (l != mm->map_count)
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tail_map = NULL; /* After gate map */
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out:
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if (map)
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return map;
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/* End of maps has reached */
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m->version = (tail_map != NULL)? 0: -1UL;
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up_read(&mm->mmap_sem);
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mmput(mm);
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return tail_map;
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}
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static void m_stop(struct seq_file *m, void *v)
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{
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struct task_struct *task = m->private;
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struct vm_area_struct *map = v;
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if (map && map != get_gate_vma(task)) {
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struct mm_struct *mm = map->vm_mm;
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up_read(&mm->mmap_sem);
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mmput(mm);
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}
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}
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static void *m_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct task_struct *task = m->private;
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struct vm_area_struct *map = v;
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struct vm_area_struct *tail_map = get_gate_vma(task);
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(*pos)++;
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if (map && (map != tail_map) && map->vm_next)
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return map->vm_next;
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m_stop(m, v);
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return (map != tail_map)? tail_map: NULL;
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}
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struct seq_operations proc_pid_maps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_map
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};
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