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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_SPARC_JUMP_LABEL_H
   3#define _ASM_SPARC_JUMP_LABEL_H
   4
   5#ifndef __ASSEMBLY__
   6
   7#include <linux/types.h>
   8
   9#define JUMP_LABEL_NOP_SIZE 4
  10
  11static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
  12{
  13        asm_volatile_goto("1:\n\t"
  14                 "nop\n\t"
  15                 "nop\n\t"
  16                 ".pushsection __jump_table,  \"aw\"\n\t"
  17                 ".align 4\n\t"
  18                 ".word 1b, %l[l_yes], %c0\n\t"
  19                 ".popsection \n\t"
  20                 : :  "i" (&((char *)key)[branch]) : : l_yes);
  21
  22        return false;
  23l_yes:
  24        return true;
  25}
  26
  27static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
  28{
  29        asm_volatile_goto("1:\n\t"
  30                 "b %l[l_yes]\n\t"
  31                 "nop\n\t"
  32                 ".pushsection __jump_table,  \"aw\"\n\t"
  33                 ".align 4\n\t"
  34                 ".word 1b, %l[l_yes], %c0\n\t"
  35                 ".popsection \n\t"
  36                 : :  "i" (&((char *)key)[branch]) : : l_yes);
  37
  38        return false;
  39l_yes:
  40        return true;
  41}
  42
  43typedef u32 jump_label_t;
  44
  45struct jump_entry {
  46        jump_label_t code;
  47        jump_label_t target;
  48        jump_label_t key;
  49};
  50
  51#endif  /* __ASSEMBLY__ */
  52#endif
  53