arch/x86/include/asm/inat.h

   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>
  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
  39 #define INAT_LSTPFX_MAX 3
  40 #define INAT_LGCPFX_MAX 11
  41
  42 /* Immediate size */
  43 #define INAT_IMM_BYTE           1
  44 #define INAT_IMM_WORD           2
  45 #define INAT_IMM_DWORD          3
  46 #define INAT_IMM_QWORD          4
  47 #define INAT_IMM_PTR            5
  48 #define INAT_IMM_VWORD32        6
  49 #define INAT_IMM_VWORD          7
  50
  51 /* Legacy prefix */
  52 #define INAT_PFX_OFFS   0
  53 #define INAT_PFX_BITS   4
  54 #define INAT_PFX_MAX    ((1 << INAT_PFX_BITS) - 1)
  55 #define INAT_PFX_MASK   (INAT_PFX_MAX << INAT_PFX_OFFS)
  56 /* Escape opcodes */
  57 #define INAT_ESC_OFFS   (INAT_PFX_OFFS + INAT_PFX_BITS)
  58 #define INAT_ESC_BITS   2
  59 #define INAT_ESC_MAX    ((1 << INAT_ESC_BITS) - 1)
  60 #define INAT_ESC_MASK   (INAT_ESC_MAX << INAT_ESC_OFFS)
  61 /* Group opcodes (1-16) */
  62 #define INAT_GRP_OFFS   (INAT_ESC_OFFS + INAT_ESC_BITS)
  63 #define INAT_GRP_BITS   5
  64 #define INAT_GRP_MAX    ((1 << INAT_GRP_BITS) - 1)
  65 #define INAT_GRP_MASK   (INAT_GRP_MAX << INAT_GRP_OFFS)
  66 /* Immediates */
  67 #define INAT_IMM_OFFS   (INAT_GRP_OFFS + INAT_GRP_BITS)
  68 #define INAT_IMM_BITS   3
  69 #define INAT_IMM_MASK   (((1 << INAT_IMM_BITS) - 1) << INAT_IMM_OFFS)
  70 /* Flags */
  71 #define INAT_FLAG_OFFS  (INAT_IMM_OFFS + INAT_IMM_BITS)
  72 #define INAT_MODRM      (1 << (INAT_FLAG_OFFS))
  73 #define INAT_FORCE64    (1 << (INAT_FLAG_OFFS + 1))
  74 #define INAT_SCNDIMM    (1 << (INAT_FLAG_OFFS + 2))
  75 #define INAT_MOFFSET    (1 << (INAT_FLAG_OFFS + 3))
  76 #define INAT_VARIANT    (1 << (INAT_FLAG_OFFS + 4))
  77 #define INAT_VEXOK      (1 << (INAT_FLAG_OFFS + 5))
  78 #define INAT_VEXONLY    (1 << (INAT_FLAG_OFFS + 6))
  79 #define INAT_EVEXONLY   (1 << (INAT_FLAG_OFFS + 7))
  80 /* Attribute making macros for attribute tables */
  81 #define INAT_MAKE_PREFIX(pfx)   (pfx << INAT_PFX_OFFS)
  82 #define INAT_MAKE_ESCAPE(esc)   (esc << INAT_ESC_OFFS)
  83 #define INAT_MAKE_GROUP(grp)    ((grp << INAT_GRP_OFFS) | INAT_MODRM)
  84 #define INAT_MAKE_IMM(imm)      (imm << INAT_IMM_OFFS)
  85
  86 /* Identifiers for segment registers */
  87 #define INAT_SEG_REG_IGNORE     0
  88 #define INAT_SEG_REG_DEFAULT    1
  89 #define INAT_SEG_REG_CS         2
  90 #define INAT_SEG_REG_SS         3
  91 #define INAT_SEG_REG_DS         4
  92 #define INAT_SEG_REG_ES         5
  93 #define INAT_SEG_REG_FS         6
  94 #define INAT_SEG_REG_GS         7
  95
  96 /* Attribute search APIs */
  97 extern insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode);
  98 extern int inat_get_last_prefix_id(insn_byte_t last_pfx);
  99 extern insn_attr_t inat_get_escape_attribute(insn_byte_t opcode,
 100                                              int lpfx_id,
 101                                              insn_attr_t esc_attr);
 102 extern insn_attr_t inat_get_group_attribute(insn_byte_t modrm,
 103                                             int lpfx_id,
 104                                             insn_attr_t esc_attr);
 105 extern insn_attr_t inat_get_avx_attribute(insn_byte_t opcode,
 106                                           insn_byte_t vex_m,
 107                                           insn_byte_t vex_pp);
 108
 109 /* Attribute checking functions */
 110 static inline int inat_is_legacy_prefix(insn_attr_t attr)
 111 {
 112         attr &= INAT_PFX_MASK;
 113         return attr && attr <= INAT_LGCPFX_MAX;
 114 }
 115
 116 static inline int inat_is_address_size_prefix(insn_attr_t attr)
 117 {
 118         return (attr & INAT_PFX_MASK) == INAT_PFX_ADDRSZ;
 119 }
 120
 121 static inline int inat_is_operand_size_prefix(insn_attr_t attr)
 122 {
 123         return (attr & INAT_PFX_MASK) == INAT_PFX_OPNDSZ;
 124 }
 125
 126 static inline int inat_is_rex_prefix(insn_attr_t attr)
 127 {
 128         return (attr & INAT_PFX_MASK) == INAT_PFX_REX;
 129 }
 130
 131 static inline int inat_last_prefix_id(insn_attr_t attr)
 132 {
 133         if ((attr & INAT_PFX_MASK) > INAT_LSTPFX_MAX)
 134                 return 0;
 135         else
 136                 return attr & INAT_PFX_MASK;
 137 }
 138
 139 static inline int inat_is_vex_prefix(insn_attr_t attr)
 140 {
 141         attr &= INAT_PFX_MASK;
 142         return attr == INAT_PFX_VEX2 || attr == INAT_PFX_VEX3 ||
 143                attr == INAT_PFX_EVEX;
 144 }
 145
 146 static inline int inat_is_evex_prefix(insn_attr_t attr)
 147 {
 148         return (attr & INAT_PFX_MASK) == INAT_PFX_EVEX;
 149 }
 150
 151 static inline int inat_is_vex3_prefix(insn_attr_t attr)
 152 {
 153         return (attr & INAT_PFX_MASK) == INAT_PFX_VEX3;
 154 }
 155
 156 static inline int inat_is_escape(insn_attr_t attr)
 157 {
 158         return attr & INAT_ESC_MASK;
 159 }
 160
 161 static inline int inat_escape_id(insn_attr_t attr)
 162 {
 163         return (attr & INAT_ESC_MASK) >> INAT_ESC_OFFS;
 164 }
 165
 166 static inline int inat_is_group(insn_attr_t attr)
 167 {
 168         return attr & INAT_GRP_MASK;
 169 }
 170
 171 static inline int inat_group_id(insn_attr_t attr)
 172 {
 173         return (attr & INAT_GRP_MASK) >> INAT_GRP_OFFS;
 174 }
 175
 176 static inline int inat_group_common_attribute(insn_attr_t attr)
 177 {
 178         return attr & ~INAT_GRP_MASK;
 179 }
 180
 181 static inline int inat_has_immediate(insn_attr_t attr)
 182 {
 183         return attr & INAT_IMM_MASK;
 184 }
 185
 186 static inline int inat_immediate_size(insn_attr_t attr)
 187 {
 188         return (attr & INAT_IMM_MASK) >> INAT_IMM_OFFS;
 189 }
 190
 191 static inline int inat_has_modrm(insn_attr_t attr)
 192 {
 193         return attr & INAT_MODRM;
 194 }
 195
 196 static inline int inat_is_force64(insn_attr_t attr)
 197 {
 198         return attr & INAT_FORCE64;
 199 }
 200
 201 static inline int inat_has_second_immediate(insn_attr_t attr)
 202 {
 203         return attr & INAT_SCNDIMM;
 204 }
 205
 206 static inline int inat_has_moffset(insn_attr_t attr)
 207 {
 208         return attr & INAT_MOFFSET;
 209 }
 210
 211 static inline int inat_has_variant(insn_attr_t attr)
 212 {
 213         return attr & INAT_VARIANT;
 214 }
 215
 216 static inline int inat_accept_vex(insn_attr_t attr)
 217 {
 218         return attr & INAT_VEXOK;
 219 }
 220
 221 static inline int inat_must_vex(insn_attr_t attr)
 222 {
 223         return attr & (INAT_VEXONLY | INAT_EVEXONLY);
 224 }
 225
 226 static inline int inat_must_evex(insn_attr_t attr)
 227 {
 228         return attr & INAT_EVEXONLY;
 229 }
 230 #endif