Quelle  jump_label.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef __ASM_CSKY_JUMP_LABEL_H
#define __ASM_CSKY_JUMP_LABEL_H

#ifndef __ASSEMBLY__

#include <linux/types.h>

#define JUMP_LABEL_NOP_SIZE 4

static __always_inline bool arch_static_branch(struct static_key *key,
            bool branch)
{
 asm goto(
  "1: nop32 \n"
  " .pushsection __jump_table, \"aw\" \n"
  " .align 2 \n"
  " .long 1b - ., %l[label] - . \n"
  " .long %0 - . \n"
  " .popsection \n"
  :  :  "i"(&((char *)key)[branch]) :  : label);

 return false;
label:
 return true;
}

static __always_inline bool arch_static_branch_jump(struct static_key *key,
          bool branch)
{
 asm goto(
  "1: bsr32 %l[label] \n"
  " .pushsection __jump_table, \"aw\" \n"
  " .align 2 \n"
  " .long 1b - ., %l[label] - . \n"
  " .long %0 - . \n"
  " .popsection \n"
  :  :  "i"(&((char *)key)[branch]) :  : label);

 return false;
label:
 return true;
}

enum jump_label_type;
void arch_jump_label_transform_static(struct jump_entry *entry,
          enum jump_label_type type);
#define arch_jump_label_transform_static arch_jump_label_transform_static

#endif  /* __ASSEMBLY__ */
#endif /* __ASM_CSKY_JUMP_LABEL_H */