Home | History | Annotate | Line # | Download | only in include
asm.h revision 1.2.2.2 
      1  1.2.2.2    martin /* $NetBSD: asm.h,v 1.2.2.2 2020/04/13 08:03:27 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  1.2.2.2    martin #ifdef __aarch64__
      9  1.2.2.2    martin 
     10  1.2.2.2    martin #ifdef __ASSEMBLER__
     11  1.2.2.2    martin .macro	adrl 	reg, addr
     12  1.2.2.2    martin 	adrp	\reg, \addr
     13  1.2.2.2    martin 	add	\reg, \reg, #:lo12:\addr
     14  1.2.2.2    martin .endm
     15  1.2.2.2    martin #endif
     16  1.2.2.2    martin 
     17  1.2.2.1  christos #define	fp	x29
     18  1.2.2.1  christos #define	lr	x30
     19  1.2.2.1  christos 
     20  1.2.2.2    martin /*
     21  1.2.2.2    martin  * Add a speculation barrier after the 'eret'.
     22  1.2.2.2    martin  * Some aarch64 cpus speculatively execute instructions after 'eret',
     23  1.2.2.2    martin  * and this potentiates side-channel attacks.
     24  1.2.2.2    martin  */
     25  1.2.2.2    martin #define	ERET	\
     26  1.2.2.2    martin 	eret; dsb sy; isb
     27  1.2.2.2    martin 
     28  1.2.2.2    martin #endif
     29  1.2.2.2    martin 
     30      1.1      matt #endif /* !_AARCH64_ASM_H_ */
     31