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Linux/arch/sparc/include/asm/jump_label.h

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  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 
 10 static __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;
 22 l_yes:
 23         return true;
 24 }
 25 
 26 static __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;
 38 l_yes:
 39         return true;
 40 }
 41 
 42 typedef u32 jump_label_t;
 43 
 44 struct 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 

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