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asm.h revision 1.3.4.1 
      1  1.3.4.1    martin /* $NetBSD: asm.h,v 1.3.4.1 2019/12/24 17:30:28 martin Exp $ */
      2      1.1      matt 
      3      1.1      matt #ifndef _AARCH64_ASM_H_
      4      1.1      matt #define _AARCH64_ASM_H_
      5      1.1      matt 
      6      1.1      matt #include <arm/asm.h>
      7      1.1      matt 
      8      1.3  christos #define	fp	x29
      9      1.3  christos #define	lr	x30
     10      1.3  christos 
     11  1.3.4.1    martin /*
     12  1.3.4.1    martin  * Add a speculation barrier after the 'eret'.
     13  1.3.4.1    martin  * Some aarch64 cpus speculatively execute instructions after 'eret',
     14  1.3.4.1    martin  * and this potentiates side-channel attacks.
     15  1.3.4.1    martin  */
     16  1.3.4.1    martin #define	ERET	\
     17  1.3.4.1    martin 	eret; dsb sy; isb
     18  1.3.4.1    martin 
     19      1.1      matt #endif /* !_AARCH64_ASM_H_ */
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