asm.h revision 1.2.2.3
1 1.2.2.2 martin /* $NetBSD: asm.h,v 1.2.2.3 2020/04/21 18:42:02 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 1.2.2.3 martin #if defined(_KERNEL_OPT) 7 1.2.2.3 martin #include "opt_cpuoptions.h" 8 1.2.2.3 martin #endif 9 1.2.2.3 martin 10 1.1 matt #include <arm/asm.h> 11 1.1 matt 12 1.2.2.2 martin #ifdef __aarch64__ 13 1.2.2.2 martin 14 1.2.2.2 martin #ifdef __ASSEMBLER__ 15 1.2.2.2 martin .macro adrl reg, addr 16 1.2.2.2 martin adrp \reg, \addr 17 1.2.2.2 martin add \reg, \reg, #:lo12:\addr 18 1.2.2.2 martin .endm 19 1.2.2.2 martin #endif 20 1.2.2.2 martin 21 1.2.2.1 christos #define fp x29 22 1.2.2.1 christos #define lr x30 23 1.2.2.1 christos 24 1.2.2.2 martin /* 25 1.2.2.2 martin * Add a speculation barrier after the 'eret'. 26 1.2.2.2 martin * Some aarch64 cpus speculatively execute instructions after 'eret', 27 1.2.2.2 martin * and this potentiates side-channel attacks. 28 1.2.2.2 martin */ 29 1.2.2.2 martin #define ERET \ 30 1.2.2.2 martin eret; dsb sy; isb 31 1.2.2.2 martin 32 1.2.2.3 martin /* 33 1.2.2.3 martin * ARMv8 options to be made available for the compiler to use. Should be 34 1.2.2.3 martin * inserted at the beginning of the ASM files that need them. 35 1.2.2.3 martin * 36 1.2.2.3 martin * For now the only option is PAC, needed for the compiler to recognize 37 1.2.2.3 martin * the key registers. 38 1.2.2.3 martin */ 39 1.2.2.3 martin #ifdef ARMV83_PAC 40 1.2.2.3 martin #define ARMV8_DEFINE_OPTIONS \ 41 1.2.2.3 martin .arch armv8.3-a+pac 42 1.2.2.3 martin #else 43 1.2.2.3 martin #define ARMV8_DEFINE_OPTIONS /* nothing */ 44 1.2.2.3 martin #endif 45 1.2.2.3 martin 46 1.2.2.2 martin #endif 47 1.2.2.2 martin 48 1.1 matt #endif /* !_AARCH64_ASM_H_ */ 49
Indexes created Sat Oct 25 10:09:55 GMT 2025