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1 #ifndef _ASM_X86_INAT_H
2 #define _ASM_X86_INAT_H
3 /*
4  * x86 instruction attributes
5  *
6  * Written by Masami Hiramatsu <mhiramat@redhat.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21  *
22  */
23 #include <asm/inat_types.h>
24 
25 /*
26  * Internal bits. Don't use bitmasks directly, because these bits are
27  * unstable. You should use checking functions.
28  */
29 
30 #define INAT_OPCODE_TABLE_SIZE 256
31 #define INAT_GROUP_TABLE_SIZE 8
32 
33 /* Legacy last prefixes */
34 #define INAT_PFX_OPNDSZ	1	/* 0x66 */ /* LPFX1 */
35 #define INAT_PFX_REPE	2	/* 0xF3 */ /* LPFX2 */
36 #define INAT_PFX_REPNE	3	/* 0xF2 */ /* LPFX3 */
37 /* Other Legacy prefixes */
38 #define INAT_PFX_LOCK	4	/* 0xF0 */
39 #define INAT_PFX_CS	5	/* 0x2E */
40 #define INAT_PFX_DS	6	/* 0x3E */
41 #define INAT_PFX_ES	7	/* 0x26 */
42 #define INAT_PFX_FS	8	/* 0x64 */
43 #define INAT_PFX_GS	9	/* 0x65 */
44 #define INAT_PFX_SS	10	/* 0x36 */
45 #define INAT_PFX_ADDRSZ	11	/* 0x67 */
46 /* x86-64 REX prefix */
47 #define INAT_PFX_REX	12	/* 0x4X */
48 /* AVX VEX prefixes */
49 #define INAT_PFX_VEX2	13	/* 2-bytes VEX prefix */
50 #define INAT_PFX_VEX3	14	/* 3-bytes VEX prefix */
51 
52 #define INAT_LSTPFX_MAX	3
53 #define INAT_LGCPFX_MAX	11
54 
55 /* Immediate size */
56 #define INAT_IMM_BYTE		1
57 #define INAT_IMM_WORD		2
58 #define INAT_IMM_DWORD		3
59 #define INAT_IMM_QWORD		4
60 #define INAT_IMM_PTR		5
61 #define INAT_IMM_VWORD32	6
62 #define INAT_IMM_VWORD		7
63 
64 /* Legacy prefix */
65 #define INAT_PFX_OFFS	0
66 #define INAT_PFX_BITS	4
67 #define INAT_PFX_MAX    ((1 << INAT_PFX_BITS) - 1)
68 #define INAT_PFX_MASK	(INAT_PFX_MAX << INAT_PFX_OFFS)
69 /* Escape opcodes */
70 #define INAT_ESC_OFFS	(INAT_PFX_OFFS + INAT_PFX_BITS)
71 #define INAT_ESC_BITS	2
72 #define INAT_ESC_MAX	((1 << INAT_ESC_BITS) - 1)
73 #define INAT_ESC_MASK	(INAT_ESC_MAX << INAT_ESC_OFFS)
74 /* Group opcodes (1-16) */
75 #define INAT_GRP_OFFS	(INAT_ESC_OFFS + INAT_ESC_BITS)
76 #define INAT_GRP_BITS	5
77 #define INAT_GRP_MAX	((1 << INAT_GRP_BITS) - 1)
78 #define INAT_GRP_MASK	(INAT_GRP_MAX << INAT_GRP_OFFS)
79 /* Immediates */
80 #define INAT_IMM_OFFS	(INAT_GRP_OFFS + INAT_GRP_BITS)
81 #define INAT_IMM_BITS	3
82 #define INAT_IMM_MASK	(((1 << INAT_IMM_BITS) - 1) << INAT_IMM_OFFS)
83 /* Flags */
84 #define INAT_FLAG_OFFS	(INAT_IMM_OFFS + INAT_IMM_BITS)
85 #define INAT_MODRM	(1 << (INAT_FLAG_OFFS))
86 #define INAT_FORCE64	(1 << (INAT_FLAG_OFFS + 1))
87 #define INAT_SCNDIMM	(1 << (INAT_FLAG_OFFS + 2))
88 #define INAT_MOFFSET	(1 << (INAT_FLAG_OFFS + 3))
89 #define INAT_VARIANT	(1 << (INAT_FLAG_OFFS + 4))
90 #define INAT_VEXOK	(1 << (INAT_FLAG_OFFS + 5))
91 #define INAT_VEXONLY	(1 << (INAT_FLAG_OFFS + 6))
92 /* Attribute making macros for attribute tables */
93 #define INAT_MAKE_PREFIX(pfx)	(pfx << INAT_PFX_OFFS)
94 #define INAT_MAKE_ESCAPE(esc)	(esc << INAT_ESC_OFFS)
95 #define INAT_MAKE_GROUP(grp)	((grp << INAT_GRP_OFFS) | INAT_MODRM)
96 #define INAT_MAKE_IMM(imm)	(imm << INAT_IMM_OFFS)
97 
98 /* Attribute search APIs */
99 extern insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode);
100 extern int inat_get_last_prefix_id(insn_byte_t last_pfx);
101 extern insn_attr_t inat_get_escape_attribute(insn_byte_t opcode,
102 					     int lpfx_id,
103 					     insn_attr_t esc_attr);
104 extern insn_attr_t inat_get_group_attribute(insn_byte_t modrm,
105 					    int lpfx_id,
106 					    insn_attr_t esc_attr);
107 extern insn_attr_t inat_get_avx_attribute(insn_byte_t opcode,
108 					  insn_byte_t vex_m,
109 					  insn_byte_t vex_pp);
110 
111 /* Attribute checking functions */
inat_is_legacy_prefix(insn_attr_t attr)112 static inline int inat_is_legacy_prefix(insn_attr_t attr)
113 {
114 	attr &= INAT_PFX_MASK;
115 	return attr && attr <= INAT_LGCPFX_MAX;
116 }
117 
inat_is_address_size_prefix(insn_attr_t attr)118 static inline int inat_is_address_size_prefix(insn_attr_t attr)
119 {
120 	return (attr & INAT_PFX_MASK) == INAT_PFX_ADDRSZ;
121 }
122 
inat_is_operand_size_prefix(insn_attr_t attr)123 static inline int inat_is_operand_size_prefix(insn_attr_t attr)
124 {
125 	return (attr & INAT_PFX_MASK) == INAT_PFX_OPNDSZ;
126 }
127 
inat_is_rex_prefix(insn_attr_t attr)128 static inline int inat_is_rex_prefix(insn_attr_t attr)
129 {
130 	return (attr & INAT_PFX_MASK) == INAT_PFX_REX;
131 }
132 
inat_last_prefix_id(insn_attr_t attr)133 static inline int inat_last_prefix_id(insn_attr_t attr)
134 {
135 	if ((attr & INAT_PFX_MASK) > INAT_LSTPFX_MAX)
136 		return 0;
137 	else
138 		return attr & INAT_PFX_MASK;
139 }
140 
inat_is_vex_prefix(insn_attr_t attr)141 static inline int inat_is_vex_prefix(insn_attr_t attr)
142 {
143 	attr &= INAT_PFX_MASK;
144 	return attr == INAT_PFX_VEX2 || attr == INAT_PFX_VEX3;
145 }
146 
inat_is_vex3_prefix(insn_attr_t attr)147 static inline int inat_is_vex3_prefix(insn_attr_t attr)
148 {
149 	return (attr & INAT_PFX_MASK) == INAT_PFX_VEX3;
150 }
151 
inat_is_escape(insn_attr_t attr)152 static inline int inat_is_escape(insn_attr_t attr)
153 {
154 	return attr & INAT_ESC_MASK;
155 }
156 
inat_escape_id(insn_attr_t attr)157 static inline int inat_escape_id(insn_attr_t attr)
158 {
159 	return (attr & INAT_ESC_MASK) >> INAT_ESC_OFFS;
160 }
161 
inat_is_group(insn_attr_t attr)162 static inline int inat_is_group(insn_attr_t attr)
163 {
164 	return attr & INAT_GRP_MASK;
165 }
166 
inat_group_id(insn_attr_t attr)167 static inline int inat_group_id(insn_attr_t attr)
168 {
169 	return (attr & INAT_GRP_MASK) >> INAT_GRP_OFFS;
170 }
171 
inat_group_common_attribute(insn_attr_t attr)172 static inline int inat_group_common_attribute(insn_attr_t attr)
173 {
174 	return attr & ~INAT_GRP_MASK;
175 }
176 
inat_has_immediate(insn_attr_t attr)177 static inline int inat_has_immediate(insn_attr_t attr)
178 {
179 	return attr & INAT_IMM_MASK;
180 }
181 
inat_immediate_size(insn_attr_t attr)182 static inline int inat_immediate_size(insn_attr_t attr)
183 {
184 	return (attr & INAT_IMM_MASK) >> INAT_IMM_OFFS;
185 }
186 
inat_has_modrm(insn_attr_t attr)187 static inline int inat_has_modrm(insn_attr_t attr)
188 {
189 	return attr & INAT_MODRM;
190 }
191 
inat_is_force64(insn_attr_t attr)192 static inline int inat_is_force64(insn_attr_t attr)
193 {
194 	return attr & INAT_FORCE64;
195 }
196 
inat_has_second_immediate(insn_attr_t attr)197 static inline int inat_has_second_immediate(insn_attr_t attr)
198 {
199 	return attr & INAT_SCNDIMM;
200 }
201 
inat_has_moffset(insn_attr_t attr)202 static inline int inat_has_moffset(insn_attr_t attr)
203 {
204 	return attr & INAT_MOFFSET;
205 }
206 
inat_has_variant(insn_attr_t attr)207 static inline int inat_has_variant(insn_attr_t attr)
208 {
209 	return attr & INAT_VARIANT;
210 }
211 
inat_accept_vex(insn_attr_t attr)212 static inline int inat_accept_vex(insn_attr_t attr)
213 {
214 	return attr & INAT_VEXOK;
215 }
216 
inat_must_vex(insn_attr_t attr)217 static inline int inat_must_vex(insn_attr_t attr)
218 {
219 	return attr & INAT_VEXONLY;
220 }
221 #endif
222