LXR linux/arch/sparc/include/asm/jump

   1#ifndef _ASM_SPARC_JUMP_LABEL_H
   2#define _ASM_SPARC_JUMP_LABEL_H
   3
   4#ifndef __ASSEMBLY__
   5
   6#include <linux/types.h>
   7
   8#define JUMP_LABEL_NOP_SIZE 4
   9
  10static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
  11{
  12        asm_volatile_goto("1:\n\t"
  13                 "nop\n\t"
  14                 "nop\n\t"
  15                 ".pushsection __jump_table,  \"aw\"\n\t"
  16                 ".align 4\n\t"
  17                 ".word 1b, %l[l_yes], %c0\n\t"
  18                 ".popsection \n\t"
  19                 : :  "i" (&((char *)key)[branch]) : : l_yes);
  20
  21        return false;
  22l_yes:
  23        return true;
  24}
  25
  26static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
  27{
  28        asm_volatile_goto("1:\n\t"
  29                 "b %l[l_yes]\n\t"
  30                 "nop\n\t"
  31                 ".pushsection __jump_table,  \"aw\"\n\t"
  32                 ".align 4\n\t"
  33                 ".word 1b, %l[l_yes], %c0\n\t"
  34                 ".popsection \n\t"
  35                 : :  "i" (&((char *)key)[branch]) : : l_yes);
  36
  37        return false;
  38l_yes:
  39        return true;
  40}
  41
  42typedef u32 jump_label_t;
  43
  44struct jump_entry {
  45        jump_label_t code;
  46        jump_label_t target;
  47        jump_label_t key;
  48};
  49
  50#endif  /* __ASSEMBLY__ */
  51#endif
  52