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asm.h revision 1.3.4.1 
      1 /* $NetBSD: asm.h,v 1.3.4.1 2019/12/24 17:30:28 martin Exp $ */
      2 
      3 #ifndef _AARCH64_ASM_H_
      4 #define _AARCH64_ASM_H_
      5 
      6 #include <arm/asm.h>
      7 
      8 #define	fp	x29
      9 #define	lr	x30
     10 
     11 /*
     12  * Add a speculation barrier after the 'eret'.
     13  * Some aarch64 cpus speculatively execute instructions after 'eret',
     14  * and this potentiates side-channel attacks.
     15  */
     16 #define	ERET	\
     17 	eret; dsb sy; isb
     18 
     19 #endif /* !_AARCH64_ASM_H_ */
     20