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asm.h revision 1.6 
      1 /* $NetBSD: asm.h,v 1.6 2020/01/19 16:12:56 skrll Exp $ */
      2 
      3 #ifndef _AARCH64_ASM_H_
      4 #define _AARCH64_ASM_H_
      5 
      6 #include <arm/asm.h>
      7 
      8 #ifdef __aarch64__
      9 
     10 #ifdef __ASSEMBLER__
     11 .macro	adrl 	reg, addr
     12 	adrp	\reg, \addr
     13 	add	\reg, \reg, #:lo12:\addr
     14 .endm
     15 #endif
     16 
     17 #define	fp	x29
     18 #define	lr	x30
     19 
     20 /*
     21  * Add a speculation barrier after the 'eret'.
     22  * Some aarch64 cpus speculatively execute instructions after 'eret',
     23  * and this potentiates side-channel attacks.
     24  */
     25 #define	ERET	\
     26 	eret; dsb sy; isb
     27 
     28 #endif
     29 
     30 #endif /* !_AARCH64_ASM_H_ */
     31