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