arch/x86/lib/inat.c

   1 /*
   2  * x86 instruction attribute tables
   3  *
   4  * Written by Masami Hiramatsu <mhiramat@redhat.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  *
  20  */
  21 #include <asm/insn.h>
  22
  23 /* Attribute tables are generated from opcode map */
  24 #include "inat-tables.c"
  25
  26 /* Attribute search APIs */
  27 insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode)
  28 {
  29         return inat_primary_table[opcode];
  30 }
  31
  32 insn_attr_t inat_get_escape_attribute(insn_byte_t opcode, insn_byte_t last_pfx,
  33                                       insn_attr_t esc_attr)
  34 {
  35         const insn_attr_t *table;
  36         insn_attr_t lpfx_attr;
  37         int n, m = 0;
  38
  39         n = inat_escape_id(esc_attr);
  40         if (last_pfx) {
  41                 lpfx_attr = inat_get_opcode_attribute(last_pfx);
  42                 m = inat_last_prefix_id(lpfx_attr);
  43         }
  44         table = inat_escape_tables[n][0];
  45         if (!table)
  46                 return 0;
  47         if (inat_has_variant(table[opcode]) && m) {
  48                 table = inat_escape_tables[n][m];
  49                 if (!table)
  50                         return 0;
  51         }
  52         return table[opcode];
  53 }
  54
  55 insn_attr_t inat_get_group_attribute(insn_byte_t modrm, insn_byte_t last_pfx,
  56                                      insn_attr_t grp_attr)
  57 {
  58         const insn_attr_t *table;
  59         insn_attr_t lpfx_attr;
  60         int n, m = 0;
  61
  62         n = inat_group_id(grp_attr);
  63         if (last_pfx) {
  64                 lpfx_attr = inat_get_opcode_attribute(last_pfx);
  65                 m = inat_last_prefix_id(lpfx_attr);
  66         }
  67         table = inat_group_tables[n][0];
  68         if (!table)
  69                 return inat_group_common_attribute(grp_attr);
  70         if (inat_has_variant(table[X86_MODRM_REG(modrm)]) && m) {
  71                 table = inat_group_tables[n][m];
  72                 if (!table)
  73                         return inat_group_common_attribute(grp_attr);
  74         }
  75         return table[X86_MODRM_REG(modrm)] |
  76                inat_group_common_attribute(grp_attr);
  77 }
  78
  79 insn_attr_t inat_get_avx_attribute(insn_byte_t opcode, insn_byte_t vex_m,
  80                                    insn_byte_t vex_p)
  81 {
  82         const insn_attr_t *table;
  83         if (vex_m > X86_VEX_M_MAX || vex_p > INAT_LSTPFX_MAX)
  84                 return 0;
  85         /* At first, this checks the master table */
  86         table = inat_avx_tables[vex_m][0];
  87         if (!table)
  88                 return 0;
  89         if (!inat_is_group(table[opcode]) && vex_p) {
  90                 /* If this is not a group, get attribute directly */
  91                 table = inat_avx_tables[vex_m][vex_p];
  92                 if (!table)
  93                         return 0;
  94         }
  95         return table[opcode];
  96 }
  97