bfin-nommu-maps.patch

   1 Index: fs/proc/task_nommu.c
   2 ===================================================================
   3 RCS file: /usr/local/src/blackfin/rsync/uclinux533/uClinux-dist/linux-2.6.x/fs/proc/task_nommu.c,v
   4 retrieving revision 1.4
   5 diff -u -p -r1.4 task_nommu.c
   6 --- fs/proc/task_nommu.c        12 Aug 2005 04:12:03 -0000      1.4
   7 +++ fs/proc/task_nommu.c        25 Aug 2006 23:03:47 -0000
   8 @@ -141,20 +141,227 @@ out:
   9   * Albert D. Cahalan suggested to fake entries for the traditional
  10   * sections here.  This might be worth investigating.
  11   */
  12 +static void pad_len_spaces(struct seq_file *m, int len)
  13 +{
  14 +       len = 25 + sizeof(void*) * 6 - len;
  15 +       if (len < 1)
  16 +               len = 1;
  17 +       seq_printf(m, "%*c", len, ' ');
  18 +}
  19 +
  20  static int show_map(struct seq_file *m, void *v)
  21  {
  22 +       struct task_struct *task = m->private;
  23 +       struct vm_area_struct *vma = v;
  24 +       struct mm_struct *mm = vma->vm_mm;
  25 +       struct file *file = vma->vm_file;
  26 +       int flags = vma->vm_flags;
  27 +       unsigned long ino = 0;
  28 +       dev_t dev = 0;
  29 +       int len;
  30 +
  31 +printk("!!! BOOYA %s\n", __FUNCTION__);
  32 +
  33 +       if (file) {
  34 +               struct inode *inode = vma->vm_file->f_dentry->d_inode;
  35 +               dev = inode->i_sb->s_dev;
  36 +               ino = inode->i_ino;
  37 +       }
  38 +
  39 +       seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
  40 +                       vma->vm_start,
  41 +                       vma->vm_end,
  42 +                       flags & VM_READ ? 'r' : '-',
  43 +                       flags & VM_WRITE ? 'w' : '-',
  44 +                       flags & VM_EXEC ? 'x' : '-',
  45 +                       flags & VM_MAYSHARE ? 's' : 'p',
  46 +                       vma->vm_pgoff << PAGE_SHIFT,
  47 +                       MAJOR(dev), MINOR(dev), ino, &len);
  48 +
  49 +       /*
  50 +        * Print the dentry name for named mappings, and a
  51 +        * special [heap] marker for the heap:
  52 +        */
  53 +       if (file) {
  54 +               pad_len_spaces(m, len);
  55 +               seq_path(m, file->f_vfsmnt, file->f_dentry, "\n");
  56 +       } else {
  57 +               if (mm) {
  58 +                       if (vma->vm_start <= mm->start_brk &&
  59 +                                               vma->vm_end >= mm->brk) {
  60 +                               pad_len_spaces(m, len);
  61 +                               seq_puts(m, "[heap]");
  62 +                       } else {
  63 +                               if (vma->vm_start <= mm->start_stack &&
  64 +                                       vma->vm_end >= mm->start_stack) {
  65 +
  66 +                                       pad_len_spaces(m, len);
  67 +                                       seq_puts(m, "[stack]");
  68 +                               }
  69 +                       }
  70 +               } else {
  71 +                       pad_len_spaces(m, len);
  72 +                       seq_puts(m, "[vdso]");
  73 +               }
  74 +       }
  75 +       seq_putc(m, '\n');
  76 +
  77 +/*
  78 +       if (mss)
  79 +               seq_printf(m,
  80 +                          "Size:          %8lu kB\n"
  81 +                          "Rss:           %8lu kB\n"
  82 +                          "Shared_Clean:  %8lu kB\n"
  83 +                          "Shared_Dirty:  %8lu kB\n"
  84 +                          "Private_Clean: %8lu kB\n"
  85 +                          "Private_Dirty: %8lu kB\n",
  86 +                          (vma->vm_end - vma->vm_start) >> 10,
  87 +                          mss->resident >> 10,
  88 +                          mss->shared_clean  >> 10,
  89 +                          mss->shared_dirty  >> 10,
  90 +                          mss->private_clean >> 10,
  91 +                          mss->private_dirty >> 10);
  92 +*/
  93 +#define get_gate_vma(x) NULL
  94 +       if (m->count < m->size)  /* vma is copied successfully */
  95 +               m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
  96         return 0;
  97  }
  98  static void *m_start(struct seq_file *m, loff_t *pos)
  99  {
 100 -       return NULL;
 101 +       struct task_struct *task = m->private;
 102 +       unsigned long last_addr = m->version;
 103 +       struct mm_struct *mm;
 104 +       struct vm_area_struct *vma, *tail_vma;
 105 +       struct vm_list_struct *vml;
 106 +       loff_t l = *pos;
 107 +printk("!!! BOOYA %s\n", __FUNCTION__);
 108 +printk("%s:%i: %p %lu \n", __FUNCTION__, __LINE__, task, last_addr);
 109 +       /*
 110 +        * We remember last_addr rather than next_addr to hit with
 111 +        * mmap_cache most of the time. We have zero last_addr at
 112 +        * the beginning and also after lseek. We will have -1 last_addr
 113 +        * after the end of the vmas.
 114 +        */
 115 +
 116 +       if (last_addr == -1UL)
 117 +               return NULL;
 118 +printk("%s:%i: \n", __FUNCTION__, __LINE__);
 119 +
 120 +       mm = get_task_mm(task);
 121 +       if (!mm)
 122 +               return NULL;
 123 +printk("%s:%i: mm=%p \n", __FUNCTION__, __LINE__, mm);
 124 +
 125 +       for (vml = mm->context.vmlist; vml; vml = vml->next) {
 126 +               vma = vml->vma;
 127 +char _tmpbuf[1024];
 128 +        char *p;
 129 +       unsigned long ino = 0;
 130 +       dev_t dev = 0;
 131 +int flags = vma->vm_flags;
 132 +       struct file *file = vma->vm_file;
 133 +       if (file) {
 134 +               struct inode *inode = vma->vm_file->f_dentry->d_inode;
 135 +               dev = inode->i_sb->s_dev;
 136 +               ino = inode->i_ino;
 137 +       }
 138 +//             printk("%s:%i: %p: %lu -> %lu\n", __FUNCTION__, __LINE__, vml->vma,
 139 +//                     vml->vma->vm_start, vml->vma->vm_end);
 140 +printk("MAPS: %08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n ",
 141 +                       vma->vm_start,
 142 +                       vma->vm_end,
 143 +                       flags & VM_READ ? 'r' : '-',
 144 +                       flags & VM_WRITE ? 'w' : '-',
 145 +                       flags & VM_EXEC ? 'x' : '-',
 146 +                       flags & VM_MAYSHARE ? 's' : 'p',
 147 +                       vma->vm_pgoff << PAGE_SHIFT,
 148 +                       MAJOR(dev), MINOR(dev), ino);
 149 +if (file) {
 150 +p = d_path(file->f_dentry, file->f_vfsmnt, _tmpbuf, sizeof(_tmpbuf));
 151 +printk(" %s ", p);
 152 +
 153 +} else {
 154 +               if (mm) {
 155 +                       if (vma->vm_start <= mm->start_brk &&
 156 +                                               vma->vm_end >= mm->brk) {
 157 +                               printk(" [heap]");
 158 +                       } else {
 159 +                               if (vma->vm_start <= mm->start_stack &&
 160 +                                       vma->vm_end >= mm->start_stack) {
 161 +
 162 +                                       printk(" [stack]");
 163 +                               }
 164 +                       }
 165 +               }
 166 +}
 167 +printk("\n");
 168 +
 169 +//             if (addr >= vml->vma->vm_start && addr < vml->vma->vm_end)
 170 +//                     break;
 171 +       }
 172 +
 173 +       tail_vma = get_gate_vma(task);
 174 +       down_read(&mm->mmap_sem);
 175 +
 176 +       /* Start with last addr hint */
 177 +       if (last_addr && (vma = find_vma(mm, last_addr))) {
 178 +               vma = vma->vm_next;
 179 +               goto out;
 180 +       }
 181 +printk("%s:%i: \n", __FUNCTION__, __LINE__);
 182 +
 183 +       /*
 184 +        * Check the vma index is within the range and do
 185 +        * sequential scan until m_index.
 186 +        */
 187 +       vma = NULL;
 188 +       if ((unsigned long)l < mm->map_count) {
 189 +               vma = mm->mmap;
 190 +               while (l-- && vma)
 191 +                       vma = vma->vm_next;
 192 +               goto out;
 193 +       }
 194 +printk("%s:%i: \n", __FUNCTION__, __LINE__);
 195 +
 196 +       if (l != mm->map_count)
 197 +               tail_vma = NULL; /* After gate vma */
 198 +printk("%s:%i: \n", __FUNCTION__, __LINE__);
 199 +
 200 +out:
 201 +       if (vma)
 202 +               return vma;
 203 +printk("%s:%i: %p\n", __FUNCTION__, __LINE__, tail_vma);
 204 +
 205 +       /* End of vmas has been reached */
 206 +       m->version = (tail_vma != NULL)? 0: -1UL;
 207 +       up_read(&mm->mmap_sem);
 208 +       mmput(mm);
 209 +       return tail_vma;
 210  }
 211  static void m_stop(struct seq_file *m, void *v)
 212  {
 213 +       struct task_struct *task = m->private;
 214 +       struct vm_area_struct *vma = v;
 215 +printk("!!! BOOYA %s\n", __FUNCTION__);
 216 +       if (vma && vma != get_gate_vma(task)) {
 217 +               struct mm_struct *mm = vma->vm_mm;
 218 +               up_read(&mm->mmap_sem);
 219 +               mmput(mm);
 220 +       }
 221  }
 222  static void *m_next(struct seq_file *m, void *v, loff_t *pos)
 223  {
 224 -       return NULL;
 225 +       struct task_struct *task = m->private;
 226 +       struct vm_area_struct *vma = v;
 227 +       struct vm_area_struct *tail_vma = get_gate_vma(task);
 228 +printk("!!! BOOYA %s\n", __FUNCTION__);
 229 +
 230 +       (*pos)++;
 231 +       if (vma && (vma != tail_vma) && vma->vm_next)
 232 +               return vma->vm_next;
 233 +       m_stop(m, v);
 234 +       return (vma != tail_vma)? tail_vma: NULL;
 235  }
 236  struct seq_operations proc_pid_maps_op = {
 237         .start  = m_start,