LXR linux/tools/objtool/arch/x86/insn/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 "insn.h"
  22
  23/* Attribute tables are generated from opcode map */
  24#include "inat-tables.c"
  25
  26/* Attribute search APIs */
  27insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode)
  28{
  29        return inat_primary_table[opcode];
  30}
  31
  32int inat_get_last_prefix_id(insn_byte_t last_pfx)
  33{
  34        insn_attr_t lpfx_attr;
  35
  36        lpfx_attr = inat_get_opcode_attribute(last_pfx);
  37        return inat_last_prefix_id(lpfx_attr);
  38}
  39
  40insn_attr_t inat_get_escape_attribute(insn_byte_t opcode, int lpfx_id,
  41                                      insn_attr_t esc_attr)
  42{
  43        const insn_attr_t *table;
  44        int n;
  45
  46        n = inat_escape_id(esc_attr);
  47
  48        table = inat_escape_tables[n][0];
  49        if (!table)
  50                return 0;
  51        if (inat_has_variant(table[opcode]) && lpfx_id) {
  52                table = inat_escape_tables[n][lpfx_id];
  53                if (!table)
  54                        return 0;
  55        }
  56        return table[opcode];
  57}
  58
  59insn_attr_t inat_get_group_attribute(insn_byte_t modrm, int lpfx_id,
  60                                     insn_attr_t grp_attr)
  61{
  62        const insn_attr_t *table;
  63        int n;
  64
  65        n = inat_group_id(grp_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)]) && lpfx_id) {
  71                table = inat_group_tables[n][lpfx_id];
  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
  79insn_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
  98