arch/powerpc/lib/restart_table.c

   1 #include <asm/interrupt.h>
   2 #include <asm/kprobes.h>
   3
   4 struct soft_mask_table_entry {
   5         unsigned long start;
   6         unsigned long end;
   7 };
   8
   9 struct restart_table_entry {
  10         unsigned long start;
  11         unsigned long end;
  12         unsigned long fixup;
  13 };
  14
  15 extern struct soft_mask_table_entry __start___soft_mask_table[];
  16 extern struct soft_mask_table_entry __stop___soft_mask_table[];
  17
  18 extern struct restart_table_entry __start___restart_table[];
  19 extern struct restart_table_entry __stop___restart_table[];
  20
  21 /* Given an address, look for it in the soft mask table */
  22 bool search_kernel_soft_mask_table(unsigned long addr)
  23 {
  24         struct soft_mask_table_entry *smte = __start___soft_mask_table;
  25
  26         while (smte < __stop___soft_mask_table) {
  27                 unsigned long start = smte->start;
  28                 unsigned long end = smte->end;
  29
  30                 if (addr >= start && addr < end)
  31                         return true;
  32
  33                 smte++;
  34         }
  35         return false;
  36 }
  37 NOKPROBE_SYMBOL(search_kernel_soft_mask_table);
  38
  39 /* Given an address, look for it in the kernel exception table */
  40 unsigned long search_kernel_restart_table(unsigned long addr)
  41 {
  42         struct restart_table_entry *rte = __start___restart_table;
  43
  44         while (rte < __stop___restart_table) {
  45                 unsigned long start = rte->start;
  46                 unsigned long end = rte->end;
  47                 unsigned long fixup = rte->fixup;
  48
  49                 if (addr >= start && addr < end)
  50                         return fixup;
  51
  52                 rte++;
  53         }
  54         return 0;
  55 }
  56 NOKPROBE_SYMBOL(search_kernel_restart_table);