cregit-Linux how code gets into the kernel

Release 4.7 tools/objtool/arch/x86/insn/inat.h

#ifndef _ASM_X86_INAT_H

#define _ASM_X86_INAT_H
/*
 * x86 instruction attributes
 *
 * Written by Masami Hiramatsu <mhiramat@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */
#include "inat_types.h"

/*
 * Internal bits. Don't use bitmasks directly, because these bits are
 * unstable. You should use checking functions.
 */


#define INAT_OPCODE_TABLE_SIZE 256

#define INAT_GROUP_TABLE_SIZE 8

/* Legacy last prefixes */

#define INAT_PFX_OPNDSZ	1	
/* 0x66 */ 
/* LPFX1 */

#define INAT_PFX_REPE	2	
/* 0xF3 */ 
/* LPFX2 */

#define INAT_PFX_REPNE	3	
/* 0xF2 */ 
/* LPFX3 */
/* Other Legacy prefixes */

#define INAT_PFX_LOCK	4	
/* 0xF0 */

#define INAT_PFX_CS	5	
/* 0x2E */

#define INAT_PFX_DS	6	
/* 0x3E */

#define INAT_PFX_ES	7	
/* 0x26 */

#define INAT_PFX_FS	8	
/* 0x64 */

#define INAT_PFX_GS	9	
/* 0x65 */

#define INAT_PFX_SS	10	
/* 0x36 */

#define INAT_PFX_ADDRSZ	11	
/* 0x67 */
/* x86-64 REX prefix */

#define INAT_PFX_REX	12	
/* 0x4X */
/* AVX VEX prefixes */

#define INAT_PFX_VEX2	13	
/* 2-bytes VEX prefix */

#define INAT_PFX_VEX3	14	
/* 3-bytes VEX prefix */


#define INAT_LSTPFX_MAX	3

#define INAT_LGCPFX_MAX	11

/* Immediate size */

#define INAT_IMM_BYTE		1

#define INAT_IMM_WORD		2

#define INAT_IMM_DWORD		3

#define INAT_IMM_QWORD		4

#define INAT_IMM_PTR		5

#define INAT_IMM_VWORD32	6

#define INAT_IMM_VWORD		7

/* Legacy prefix */

#define INAT_PFX_OFFS	0

#define INAT_PFX_BITS	4

#define INAT_PFX_MAX    ((1 << INAT_PFX_BITS) - 1)

#define INAT_PFX_MASK	(INAT_PFX_MAX << INAT_PFX_OFFS)
/* Escape opcodes */

#define INAT_ESC_OFFS	(INAT_PFX_OFFS + INAT_PFX_BITS)

#define INAT_ESC_BITS	2

#define INAT_ESC_MAX	((1 << INAT_ESC_BITS) - 1)

#define INAT_ESC_MASK	(INAT_ESC_MAX << INAT_ESC_OFFS)
/* Group opcodes (1-16) */

#define INAT_GRP_OFFS	(INAT_ESC_OFFS + INAT_ESC_BITS)

#define INAT_GRP_BITS	5

#define INAT_GRP_MAX	((1 << INAT_GRP_BITS) - 1)

#define INAT_GRP_MASK	(INAT_GRP_MAX << INAT_GRP_OFFS)
/* Immediates */

#define INAT_IMM_OFFS	(INAT_GRP_OFFS + INAT_GRP_BITS)

#define INAT_IMM_BITS	3

#define INAT_IMM_MASK	(((1 << INAT_IMM_BITS) - 1) << INAT_IMM_OFFS)
/* Flags */

#define INAT_FLAG_OFFS	(INAT_IMM_OFFS + INAT_IMM_BITS)

#define INAT_MODRM	(1 << (INAT_FLAG_OFFS))

#define INAT_FORCE64	(1 << (INAT_FLAG_OFFS + 1))

#define INAT_SCNDIMM	(1 << (INAT_FLAG_OFFS + 2))

#define INAT_MOFFSET	(1 << (INAT_FLAG_OFFS + 3))

#define INAT_VARIANT	(1 << (INAT_FLAG_OFFS + 4))

#define INAT_VEXOK	(1 << (INAT_FLAG_OFFS + 5))

#define INAT_VEXONLY	(1 << (INAT_FLAG_OFFS + 6))
/* Attribute making macros for attribute tables */

#define INAT_MAKE_PREFIX(pfx)	(pfx << INAT_PFX_OFFS)

#define INAT_MAKE_ESCAPE(esc)	(esc << INAT_ESC_OFFS)

#define INAT_MAKE_GROUP(grp)	((grp << INAT_GRP_OFFS) | INAT_MODRM)

#define INAT_MAKE_IMM(imm)	(imm << INAT_IMM_OFFS)

/* Attribute search APIs */
extern insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode);
extern int inat_get_last_prefix_id(insn_byte_t last_pfx);
extern insn_attr_t inat_get_escape_attribute(insn_byte_t opcode,
					     int lpfx_id,
					     insn_attr_t esc_attr);
extern insn_attr_t inat_get_group_attribute(insn_byte_t modrm,
					    int lpfx_id,
					    insn_attr_t esc_attr);
extern insn_attr_t inat_get_avx_attribute(insn_byte_t opcode,
					  insn_byte_t vex_m,
					  insn_byte_t vex_pp);

/* Attribute checking functions */

static inline int inat_is_legacy_prefix(insn_attr_t attr) { attr &= INAT_PFX_MASK; return attr && attr <= INAT_LGCPFX_MAX; }

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static inline int inat_is_address_size_prefix(insn_attr_t attr) { return (attr & INAT_PFX_MASK) == INAT_PFX_ADDRSZ; }

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static inline int inat_is_operand_size_prefix(insn_attr_t attr) { return (attr & INAT_PFX_MASK) == INAT_PFX_OPNDSZ; }

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static inline int inat_is_rex_prefix(insn_attr_t attr) { return (attr & INAT_PFX_MASK) == INAT_PFX_REX; }

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static inline int inat_last_prefix_id(insn_attr_t attr) { if ((attr & INAT_PFX_MASK) > INAT_LSTPFX_MAX) return 0; else return attr & INAT_PFX_MASK; }

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static inline int inat_is_vex_prefix(insn_attr_t attr) { attr &= INAT_PFX_MASK; return attr == INAT_PFX_VEX2 || attr == INAT_PFX_VEX3; }

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static inline int inat_is_vex3_prefix(insn_attr_t attr) { return (attr & INAT_PFX_MASK) == INAT_PFX_VEX3; }

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static inline int inat_is_escape(insn_attr_t attr) { return attr & INAT_ESC_MASK; }

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static inline int inat_escape_id(insn_attr_t attr) { return (attr & INAT_ESC_MASK) >> INAT_ESC_OFFS; }

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static inline int inat_is_group(insn_attr_t attr) { return attr & INAT_GRP_MASK; }

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static inline int inat_group_id(insn_attr_t attr) { return (attr & INAT_GRP_MASK) >> INAT_GRP_OFFS; }

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static inline int inat_group_common_attribute(insn_attr_t attr) { return attr & ~INAT_GRP_MASK; }

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static inline int inat_has_immediate(insn_attr_t attr) { return attr & INAT_IMM_MASK; }

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static inline int inat_immediate_size(insn_attr_t attr) { return (attr & INAT_IMM_MASK) >> INAT_IMM_OFFS; }

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static inline int inat_has_modrm(insn_attr_t attr) { return attr & INAT_MODRM; }

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static inline int inat_is_force64(insn_attr_t attr) { return attr & INAT_FORCE64; }

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static inline int inat_has_second_immediate(insn_attr_t attr) { return attr & INAT_SCNDIMM; }

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static inline int inat_has_moffset(insn_attr_t attr) { return attr & INAT_MOFFSET; }

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static inline int inat_has_variant(insn_attr_t attr) { return attr & INAT_VARIANT; }

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static inline int inat_accept_vex(insn_attr_t attr) { return attr & INAT_VEXOK; }

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static inline int inat_must_vex(insn_attr_t attr) { return attr & INAT_VEXONLY; }

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#endif

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