cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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M7copy_from_user.S (723B)

      1/*
      2 * M7copy_from_user.S: SPARC M7 optimized copy from userspace.
      3 *
      4 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
      5 */
      6
      7
      8#define EX_LD(x, y)			\
      998:	x;				\
     10	.section __ex_table,"a";	\
     11	.align 4;			\
     12	.word 98b, y;			\
     13	.text;				\
     14	.align 4;
     15
     16#define EX_LD_FP(x, y)			\
     1798:	x;				\
     18	.section __ex_table,"a";	\
     19	.align 4;			\
     20	.word 98b, y##_fp;		\
     21	.text;				\
     22	.align 4;
     23
     24#ifndef ASI_AIUS
     25#define ASI_AIUS	0x11
     26#endif
     27
     28#define FUNC_NAME		M7copy_from_user
     29#define LOAD(type,addr,dest)	type##a [addr] %asi, dest
     30#define EX_RETVAL(x)		0
     31
     32#ifdef __KERNEL__
     33#define PREAMBLE					\
     34	rd		%asi, %g1;			\
     35	cmp		%g1, ASI_AIUS;			\
     36	bne,pn		%icc, raw_copy_in_user;		\
     37	 nop
     38#endif
     39
     40#include "M7memcpy.S"