1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_X86_INAT_H
3 #define _ASM_X86_INAT_H
4 /*
5 * x86 instruction attributes
6 *
7 * Written by Masami Hiramatsu <mhiramat@redhat.com>
8 */
9 #include <asm/inat_types.h> /* __ignore_sync_check__ */
10
11 /*
12 * Internal bits. Don't use bitmasks directly, because these bits are
13 * unstable. You should use checking functions.
14 */
15
16 #define INAT_OPCODE_TABLE_SIZE 256
17 #define INAT_GROUP_TABLE_SIZE 8
18
19 /* Legacy last prefixes */
20 #define INAT_PFX_OPNDSZ 1 /* 0x66 */ /* LPFX1 */
21 #define INAT_PFX_REPE 2 /* 0xF3 */ /* LPFX2 */
22 #define INAT_PFX_REPNE 3 /* 0xF2 */ /* LPFX3 */
23 /* Other Legacy prefixes */
24 #define INAT_PFX_LOCK 4 /* 0xF0 */
25 #define INAT_PFX_CS 5 /* 0x2E */
26 #define INAT_PFX_DS 6 /* 0x3E */
27 #define INAT_PFX_ES 7 /* 0x26 */
28 #define INAT_PFX_FS 8 /* 0x64 */
29 #define INAT_PFX_GS 9 /* 0x65 */
30 #define INAT_PFX_SS 10 /* 0x36 */
31 #define INAT_PFX_ADDRSZ 11 /* 0x67 */
32 /* x86-64 REX prefix */
33 #define INAT_PFX_REX 12 /* 0x4X */
34 /* AVX VEX prefixes */
35 #define INAT_PFX_VEX2 13 /* 2-bytes VEX prefix */
36 #define INAT_PFX_VEX3 14 /* 3-bytes VEX prefix */
37 #define INAT_PFX_EVEX 15 /* EVEX prefix */
38 /* x86-64 REX2 prefix */
39 #define INAT_PFX_REX2 16 /* 0xD5 */
40
41 #define INAT_LSTPFX_MAX 3
42 #define INAT_LGCPFX_MAX 11
43
44 /* Immediate size */
45 #define INAT_IMM_BYTE 1
46 #define INAT_IMM_WORD 2
47 #define INAT_IMM_DWORD 3
48 #define INAT_IMM_QWORD 4
49 #define INAT_IMM_PTR 5
50 #define INAT_IMM_VWORD32 6
51 #define INAT_IMM_VWORD 7
52
53 /* Legacy prefix */
54 #define INAT_PFX_OFFS 0
55 #define INAT_PFX_BITS 5
56 #define INAT_PFX_MAX ((1 << INAT_PFX_BITS) - 1)
57 #define INAT_PFX_MASK (INAT_PFX_MAX << INAT_PFX_OFFS)
58 /* Escape opcodes */
59 #define INAT_ESC_OFFS (INAT_PFX_OFFS + INAT_PFX_BITS)
60 #define INAT_ESC_BITS 2
61 #define INAT_ESC_MAX ((1 << INAT_ESC_BITS) - 1)
62 #define INAT_ESC_MASK (INAT_ESC_MAX << INAT_ESC_OFFS)
63 /* Group opcodes (1-16) */
64 #define INAT_GRP_OFFS (INAT_ESC_OFFS + INAT_ESC_BITS)
65 #define INAT_GRP_BITS 5
66 #define INAT_GRP_MAX ((1 << INAT_GRP_BITS) - 1)
67 #define INAT_GRP_MASK (INAT_GRP_MAX << INAT_GRP_OFFS)
68 /* Immediates */
69 #define INAT_IMM_OFFS (INAT_GRP_OFFS + INAT_GRP_BITS)
70 #define INAT_IMM_BITS 3
71 #define INAT_IMM_MASK (((1 << INAT_IMM_BITS) - 1) << INAT_IMM_OFFS)
72 /* Flags */
73 #define INAT_FLAG_OFFS (INAT_IMM_OFFS + INAT_IMM_BITS)
74 #define INAT_MODRM (1 << (INAT_FLAG_OFFS))
75 #define INAT_FORCE64 (1 << (INAT_FLAG_OFFS + 1))
76 #define INAT_SCNDIMM (1 << (INAT_FLAG_OFFS + 2))
77 #define INAT_MOFFSET (1 << (INAT_FLAG_OFFS + 3))
78 #define INAT_VARIANT (1 << (INAT_FLAG_OFFS + 4))
79 #define INAT_VEXOK (1 << (INAT_FLAG_OFFS + 5))
80 #define INAT_VEXONLY (1 << (INAT_FLAG_OFFS + 6))
81 #define INAT_EVEXONLY (1 << (INAT_FLAG_OFFS + 7))
82 #define INAT_NO_REX2 (1 << (INAT_FLAG_OFFS + 8))
83 #define INAT_REX2_VARIANT (1 << (INAT_FLAG_OFFS + 9))
84 #define INAT_EVEX_SCALABLE (1 << (INAT_FLAG_OFFS + 10))
85 /* Attribute making macros for attribute tables */
86 #define INAT_MAKE_PREFIX(pfx) (pfx << INAT_PFX_OFFS)
87 #define INAT_MAKE_ESCAPE(esc) (esc << INAT_ESC_OFFS)
88 #define INAT_MAKE_GROUP(grp) ((grp << INAT_GRP_OFFS) | INAT_MODRM)
89 #define INAT_MAKE_IMM(imm) (imm << INAT_IMM_OFFS)
90
91 /* Identifiers for segment registers */
92 #define INAT_SEG_REG_IGNORE 0
93 #define INAT_SEG_REG_DEFAULT 1
94 #define INAT_SEG_REG_CS 2
95 #define INAT_SEG_REG_SS 3
96 #define INAT_SEG_REG_DS 4
97 #define INAT_SEG_REG_ES 5
98 #define INAT_SEG_REG_FS 6
99 #define INAT_SEG_REG_GS 7
100
101 /* Attribute search APIs */
102 extern insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode);
103 extern int inat_get_last_prefix_id(insn_byte_t last_pfx);
104 extern insn_attr_t inat_get_escape_attribute(insn_byte_t opcode,
105 int lpfx_id,
106 insn_attr_t esc_attr);
107 extern insn_attr_t inat_get_group_attribute(insn_byte_t modrm,
108 int lpfx_id,
109 insn_attr_t esc_attr);
110 extern insn_attr_t inat_get_avx_attribute(insn_byte_t opcode,
111 insn_byte_t vex_m,
112 insn_byte_t vex_pp);
113
114 /* Attribute checking functions */
115 static inline int inat_is_legacy_prefix(insn_attr_t attr)
116 {
117 attr &= INAT_PFX_MASK;
118 return attr && attr <= INAT_LGCPFX_MAX;
119 }
120
121 static inline int inat_is_address_size_prefix(insn_attr_t attr)
122 {
123 return (attr & INAT_PFX_MASK) == INAT_PFX_ADDRSZ;
124 }
125
126 static inline int inat_is_operand_size_prefix(insn_attr_t attr)
127 {
128 return (attr & INAT_PFX_MASK) == INAT_PFX_OPNDSZ;
129 }
130
131 static inline int inat_is_rex_prefix(insn_attr_t attr)
132 {
133 return (attr & INAT_PFX_MASK) == INAT_PFX_REX;
134 }
135
136 static inline int inat_is_rex2_prefix(insn_attr_t attr)
137 {
138 return (attr & INAT_PFX_MASK) == INAT_PFX_REX2;
139 }
140
141 static inline int inat_last_prefix_id(insn_attr_t attr)
142 {
143 if ((attr & INAT_PFX_MASK) > INAT_LSTPFX_MAX)
144 return 0;
145 else
146 return attr & INAT_PFX_MASK;
147 }
148
149 static inline int inat_is_vex_prefix(insn_attr_t attr)
150 {
151 attr &= INAT_PFX_MASK;
152 return attr == INAT_PFX_VEX2 || attr == INAT_PFX_VEX3 ||
153 attr == INAT_PFX_EVEX;
154 }
155
156 static inline int inat_is_evex_prefix(insn_attr_t attr)
157 {
158 return (attr & INAT_PFX_MASK) == INAT_PFX_EVEX;
159 }
160
161 static inline int inat_is_vex3_prefix(insn_attr_t attr)
162 {
163 return (attr & INAT_PFX_MASK) == INAT_PFX_VEX3;
164 }
165
166 static inline int inat_is_escape(insn_attr_t attr)
167 {
168 return attr & INAT_ESC_MASK;
169 }
170
171 static inline int inat_escape_id(insn_attr_t attr)
172 {
173 return (attr & INAT_ESC_MASK) >> INAT_ESC_OFFS;
174 }
175
176 static inline int inat_is_group(insn_attr_t attr)
177 {
178 return attr & INAT_GRP_MASK;
179 }
180
181 static inline int inat_group_id(insn_attr_t attr)
182 {
183 return (attr & INAT_GRP_MASK) >> INAT_GRP_OFFS;
184 }
185
186 static inline int inat_group_common_attribute(insn_attr_t attr)
187 {
188 return attr & ~INAT_GRP_MASK;
189 }
190
191 static inline int inat_has_immediate(insn_attr_t attr)
192 {
193 return attr & INAT_IMM_MASK;
194 }
195
196 static inline int inat_immediate_size(insn_attr_t attr)
197 {
198 return (attr & INAT_IMM_MASK) >> INAT_IMM_OFFS;
199 }
200
201 static inline int inat_has_modrm(insn_attr_t attr)
202 {
203 return attr & INAT_MODRM;
204 }
205
206 static inline int inat_is_force64(insn_attr_t attr)
207 {
208 return attr & INAT_FORCE64;
209 }
210
211 static inline int inat_has_second_immediate(insn_attr_t attr)
212 {
213 return attr & INAT_SCNDIMM;
214 }
215
216 static inline int inat_has_moffset(insn_attr_t attr)
217 {
218 return attr & INAT_MOFFSET;
219 }
220
221 static inline int inat_has_variant(insn_attr_t attr)
222 {
223 return attr & INAT_VARIANT;
224 }
225
226 static inline int inat_accept_vex(insn_attr_t attr)
227 {
228 return attr & INAT_VEXOK;
229 }
230
231 static inline int inat_must_vex(insn_attr_t attr)
232 {
233 return attr & (INAT_VEXONLY | INAT_EVEXONLY);
234 }
235
236 static inline int inat_must_evex(insn_attr_t attr)
237 {
238 return attr & INAT_EVEXONLY;
239 }
240
241 static inline int inat_evex_scalable(insn_attr_t attr)
242 {
243 return attr & INAT_EVEX_SCALABLE;
244 }
245 #endif
246
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