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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asm-extable.h (1714B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2#ifndef __ASM_ASM_EXTABLE_H
      3#define __ASM_ASM_EXTABLE_H
      4
      5#define EX_TYPE_NONE			0
      6#define EX_TYPE_FIXUP			1
      7#define EX_TYPE_BPF			2
      8#define EX_TYPE_UACCESS_ERR_ZERO	3
      9
     10#ifdef __ASSEMBLY__
     11
     12#define __ASM_EXTABLE_RAW(insn, fixup, type, data)	\
     13	.pushsection	__ex_table, "a";		\
     14	.balign		4;				\
     15	.long		((insn) - .);			\
     16	.long		((fixup) - .);			\
     17	.short		(type);				\
     18	.short		(data);				\
     19	.popsection;
     20
     21	.macro		_asm_extable, insn, fixup
     22	__ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0)
     23	.endm
     24
     25#else /* __ASSEMBLY__ */
     26
     27#include <linux/bits.h>
     28#include <linux/stringify.h>
     29#include <asm/gpr-num.h>
     30
     31#define __ASM_EXTABLE_RAW(insn, fixup, type, data)	\
     32	".pushsection	__ex_table, \"a\"\n"		\
     33	".balign	4\n"				\
     34	".long		((" insn ") - .)\n"		\
     35	".long		((" fixup ") - .)\n"		\
     36	".short		(" type ")\n"			\
     37	".short		(" data ")\n"			\
     38	".popsection\n"
     39
     40#define _ASM_EXTABLE(insn, fixup)	\
     41	__ASM_EXTABLE_RAW(#insn, #fixup, __stringify(EX_TYPE_FIXUP), "0")
     42
     43#define EX_DATA_REG_ERR_SHIFT	0
     44#define EX_DATA_REG_ERR		GENMASK(4, 0)
     45#define EX_DATA_REG_ZERO_SHIFT	5
     46#define EX_DATA_REG_ZERO	GENMASK(9, 5)
     47
     48#define EX_DATA_REG(reg, gpr)						\
     49	"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
     50
     51#define _ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero)		\
     52	__DEFINE_ASM_GPR_NUMS						\
     53	__ASM_EXTABLE_RAW(#insn, #fixup, 				\
     54			  __stringify(EX_TYPE_UACCESS_ERR_ZERO),	\
     55			  "("						\
     56			    EX_DATA_REG(ERR, err) " | "			\
     57			    EX_DATA_REG(ZERO, zero)			\
     58			  ")")
     59
     60#define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err)			\
     61	_ASM_EXTABLE_UACCESS_ERR_ZERO(insn, fixup, err, zero)
     62
     63#endif /* __ASSEMBLY__ */
     64
     65#endif /* __ASM_ASM_EXTABLE_H */