#ifndef _ASM_X86_JUMP_LABEL_H #define _ASM_X86_JUMP_LABEL_H #ifdef __KERNEL__ #include #include #define JUMP_LABEL_NOP_SIZE 5 # define JUMP_LABEL_INITIAL_NOP ".byte 0xe9 \n\t .long 0\n\t" # define JUMP_LABEL(key, label) \ do { \ asm goto("1:" \ JUMP_LABEL_INITIAL_NOP \ ".pushsection __jump_table, \"aw\" \n\t"\ _ASM_PTR "1b, %l[" #label "], %c0 \n\t" \ ".popsection \n\t" \ : : "i" (key) : : label); \ } while (0) #endif /* __KERNEL__ */ #ifdef CONFIG_X86_64 typedef u64 jump_label_t; #else typedef u32 jump_label_t; #endif struct jump_entry { jump_label_t code; jump_label_t target; jump_label_t key; }; #endif