arch/x86/tools/gen-insn-attr-x86.awk

   1 #!/bin/awk -f
   2 # gen-insn-attr-x86.awk: Instruction attribute table generator
   3 # Written by Masami Hiramatsu <mhiramat@redhat.com>
   4 #
   5 # Usage: awk -f gen-insn-attr-x86.awk x86-opcode-map.txt > inat-tables.c
   6
   7 # Awk implementation sanity check
   8 function check_awk_implement() {
   9         if (sprintf("%x", 0) != "0")
  10                 return "Your awk has a printf-format problem."
  11         return ""
  12 }
  13
  14 # Clear working vars
  15 function clear_vars() {
  16         delete table
  17         delete lptable2
  18         delete lptable1
  19         delete lptable3
  20         eid = -1 # escape id
  21         gid = -1 # group id
  22         aid = -1 # AVX id
  23         tname = ""
  24 }
  25
  26 BEGIN {
  27         # Implementation error checking
  28         awkchecked = check_awk_implement()
  29         if (awkchecked != "") {
  30                 print "Error: " awkchecked > "/dev/stderr"
  31                 print "Please try to use gawk." > "/dev/stderr"
  32                 exit 1
  33         }
  34
  35         # Setup generating tables
  36         print "/* x86 opcode map generated from x86-opcode-map.txt */"
  37         print "/* Do not change this code. */\n"
  38         ggid = 1
  39         geid = 1
  40         gaid = 0
  41         delete etable
  42         delete gtable
  43         delete atable
  44
  45         opnd_expr = "^[A-Za-z/]"
  46         ext_expr = "^\\("
  47         sep_expr = "^\\|$"
  48         group_expr = "^Grp[0-9A-Za-z]+"
  49
  50         imm_expr = "^[IJAOL][a-z]"
  51         imm_flag["Ib"] = "INAT_MAKE_IMM(INAT_IMM_BYTE)"
  52         imm_flag["Jb"] = "INAT_MAKE_IMM(INAT_IMM_BYTE)"
  53         imm_flag["Iw"] = "INAT_MAKE_IMM(INAT_IMM_WORD)"
  54         imm_flag["Id"] = "INAT_MAKE_IMM(INAT_IMM_DWORD)"
  55         imm_flag["Iq"] = "INAT_MAKE_IMM(INAT_IMM_QWORD)"
  56         imm_flag["Ap"] = "INAT_MAKE_IMM(INAT_IMM_PTR)"
  57         imm_flag["Iz"] = "INAT_MAKE_IMM(INAT_IMM_VWORD32)"
  58         imm_flag["Jz"] = "INAT_MAKE_IMM(INAT_IMM_VWORD32)"
  59         imm_flag["Iv"] = "INAT_MAKE_IMM(INAT_IMM_VWORD)"
  60         imm_flag["Ob"] = "INAT_MOFFSET"
  61         imm_flag["Ov"] = "INAT_MOFFSET"
  62         imm_flag["Lx"] = "INAT_MAKE_IMM(INAT_IMM_BYTE)"
  63
  64         modrm_expr = "^([CDEGMNPQRSUVW/][a-z]+|NTA|T[012])"
  65         force64_expr = "\\([df]64\\)"
  66         rex_expr = "^REX(\\.[XRWB]+)*"
  67         fpu_expr = "^ESC" # TODO
  68
  69         lprefix1_expr = "\\((66|!F3)\\)"
  70         lprefix2_expr = "\\(F3\\)"
  71         lprefix3_expr = "\\((F2|!F3)\\)"
  72         lprefix_expr = "\\((66|F2|F3)\\)"
  73         max_lprefix = 4
  74
  75         # All opcodes starting with lower-case 'v' or with (v1) superscript
  76         # accepts VEX prefix
  77         vexok_opcode_expr = "^v.*"
  78         vexok_expr = "\\(v1\\)"
  79         # All opcodes with (v) superscript supports *only* VEX prefix
  80         vexonly_expr = "\\(v\\)"
  81
  82         prefix_expr = "\\(Prefix\\)"
  83         prefix_num["Operand-Size"] = "INAT_PFX_OPNDSZ"
  84         prefix_num["REPNE"] = "INAT_PFX_REPNE"
  85         prefix_num["REP/REPE"] = "INAT_PFX_REPE"
  86         prefix_num["LOCK"] = "INAT_PFX_LOCK"
  87         prefix_num["SEG=CS"] = "INAT_PFX_CS"
  88         prefix_num["SEG=DS"] = "INAT_PFX_DS"
  89         prefix_num["SEG=ES"] = "INAT_PFX_ES"
  90         prefix_num["SEG=FS"] = "INAT_PFX_FS"
  91         prefix_num["SEG=GS"] = "INAT_PFX_GS"
  92         prefix_num["SEG=SS"] = "INAT_PFX_SS"
  93         prefix_num["Address-Size"] = "INAT_PFX_ADDRSZ"
  94         prefix_num["VEX+1byte"] = "INAT_PFX_VEX2"
  95         prefix_num["VEX+2byte"] = "INAT_PFX_VEX3"
  96
  97         clear_vars()
  98 }
  99
 100 function semantic_error(msg) {
 101         print "Semantic error at " NR ": " msg > "/dev/stderr"
 102         exit 1
 103 }
 104
 105 function debug(msg) {
 106         print "DEBUG: " msg
 107 }
 108
 109 function array_size(arr,   i,c) {
 110         c = 0
 111         for (i in arr)
 112                 c++
 113         return c
 114 }
 115
 116 /^Table:/ {
 117         print "/* " $0 " */"
 118         if (tname != "")
 119                 semantic_error("Hit Table: before EndTable:.");
 120 }
 121
 122 /^Referrer:/ {
 123         if (NF != 1) {
 124                 # escape opcode table
 125                 ref = ""
 126                 for (i = 2; i <= NF; i++)
 127                         ref = ref $i
 128                 eid = escape[ref]
 129                 tname = sprintf("inat_escape_table_%d", eid)
 130         }
 131 }
 132
 133 /^AVXcode:/ {
 134         if (NF != 1) {
 135                 # AVX/escape opcode table
 136                 aid = $2
 137                 if (gaid <= aid)
 138                         gaid = aid + 1
 139                 if (tname == "")        # AVX only opcode table
 140                         tname = sprintf("inat_avx_table_%d", $2)
 141         }
 142         if (aid == -1 && eid == -1)     # primary opcode table
 143                 tname = "inat_primary_table"
 144 }
 145
 146 /^GrpTable:/ {
 147         print "/* " $0 " */"
 148         if (!($2 in group))
 149                 semantic_error("No group: " $2 )
 150         gid = group[$2]
 151         tname = "inat_group_table_" gid
 152 }
 153
 154 function print_table(tbl,name,fmt,n)
 155 {
 156         print "const insn_attr_t " name " = {"
 157         for (i = 0; i < n; i++) {
 158                 id = sprintf(fmt, i)
 159                 if (tbl[id])
 160                         print " [" id "] = " tbl[id] ","
 161         }
 162         print "};"
 163 }
 164
 165 /^EndTable/ {
 166         if (gid != -1) {
 167                 # print group tables
 168                 if (array_size(table) != 0) {
 169                         print_table(table, tname "[INAT_GROUP_TABLE_SIZE]",
 170                                     "0x%x", 8)
 171                         gtable[gid,0] = tname
 172                 }
 173                 if (array_size(lptable1) != 0) {
 174                         print_table(lptable1, tname "_1[INAT_GROUP_TABLE_SIZE]",
 175                                     "0x%x", 8)
 176                         gtable[gid,1] = tname "_1"
 177                 }
 178                 if (array_size(lptable2) != 0) {
 179                         print_table(lptable2, tname "_2[INAT_GROUP_TABLE_SIZE]",
 180                                     "0x%x", 8)
 181                         gtable[gid,2] = tname "_2"
 182                 }
 183                 if (array_size(lptable3) != 0) {
 184                         print_table(lptable3, tname "_3[INAT_GROUP_TABLE_SIZE]",
 185                                     "0x%x", 8)
 186                         gtable[gid,3] = tname "_3"
 187                 }
 188         } else {
 189                 # print primary/escaped tables
 190                 if (array_size(table) != 0) {
 191                         print_table(table, tname "[INAT_OPCODE_TABLE_SIZE]",
 192                                     "0x%02x", 256)
 193                         etable[eid,0] = tname
 194                         if (aid >= 0)
 195                                 atable[aid,0] = tname
 196                 }
 197                 if (array_size(lptable1) != 0) {
 198                         print_table(lptable1,tname "_1[INAT_OPCODE_TABLE_SIZE]",
 199                                     "0x%02x", 256)
 200                         etable[eid,1] = tname "_1"
 201                         if (aid >= 0)
 202                                 atable[aid,1] = tname "_1"
 203                 }
 204                 if (array_size(lptable2) != 0) {
 205                         print_table(lptable2,tname "_2[INAT_OPCODE_TABLE_SIZE]",
 206                                     "0x%02x", 256)
 207                         etable[eid,2] = tname "_2"
 208                         if (aid >= 0)
 209                                 atable[aid,2] = tname "_2"
 210                 }
 211                 if (array_size(lptable3) != 0) {
 212                         print_table(lptable3,tname "_3[INAT_OPCODE_TABLE_SIZE]",
 213                                     "0x%02x", 256)
 214                         etable[eid,3] = tname "_3"
 215                         if (aid >= 0)
 216                                 atable[aid,3] = tname "_3"
 217                 }
 218         }
 219         print ""
 220         clear_vars()
 221 }
 222
 223 function add_flags(old,new) {
 224         if (old && new)
 225                 return old " | " new
 226         else if (old)
 227                 return old
 228         else
 229                 return new
 230 }
 231
 232 # convert operands to flags.
 233 function convert_operands(count,opnd,       i,j,imm,mod)
 234 {
 235         imm = null
 236         mod = null
 237         for (j = 1; j <= count; j++) {
 238                 i = opnd[j]
 239                 if (match(i, imm_expr) == 1) {
 240                         if (!imm_flag[i])
 241                                 semantic_error("Unknown imm opnd: " i)
 242                         if (imm) {
 243                                 if (i != "Ib")
 244                                         semantic_error("Second IMM error")
 245                                 imm = add_flags(imm, "INAT_SCNDIMM")
 246                         } else
 247                                 imm = imm_flag[i]
 248                 } else if (match(i, modrm_expr))
 249                         mod = "INAT_MODRM"
 250         }
 251         return add_flags(imm, mod)
 252 }
 253
 254 /^[0-9a-f]+\:/ {
 255         if (NR == 1)
 256                 next
 257         # get index
 258         idx = "0x" substr($1, 1, index($1,":") - 1)
 259         if (idx in table)
 260                 semantic_error("Redefine " idx " in " tname)
 261
 262         # check if escaped opcode
 263         if ("escape" == $2) {
 264                 if ($3 != "#")
 265                         semantic_error("No escaped name")
 266                 ref = ""
 267                 for (i = 4; i <= NF; i++)
 268                         ref = ref $i
 269                 if (ref in escape)
 270                         semantic_error("Redefine escape (" ref ")")
 271                 escape[ref] = geid
 272                 geid++
 273                 table[idx] = "INAT_MAKE_ESCAPE(" escape[ref] ")"
 274                 next
 275         }
 276
 277         variant = null
 278         # converts
 279         i = 2
 280         while (i <= NF) {
 281                 opcode = $(i++)
 282                 delete opnds
 283                 ext = null
 284                 flags = null
 285                 opnd = null
 286                 # parse one opcode
 287                 if (match($i, opnd_expr)) {
 288                         opnd = $i
 289                         count = split($(i++), opnds, ",")
 290                         flags = convert_operands(count, opnds)
 291                 }
 292                 if (match($i, ext_expr))
 293                         ext = $(i++)
 294                 if (match($i, sep_expr))
 295                         i++
 296                 else if (i < NF)
 297                         semantic_error($i " is not a separator")
 298
 299                 # check if group opcode
 300                 if (match(opcode, group_expr)) {
 301                         if (!(opcode in group)) {
 302                                 group[opcode] = ggid
 303                                 ggid++
 304                         }
 305                         flags = add_flags(flags, "INAT_MAKE_GROUP(" group[opcode] ")")
 306                 }
 307                 # check force(or default) 64bit
 308                 if (match(ext, force64_expr))
 309                         flags = add_flags(flags, "INAT_FORCE64")
 310
 311                 # check REX prefix
 312                 if (match(opcode, rex_expr))
 313                         flags = add_flags(flags, "INAT_MAKE_PREFIX(INAT_PFX_REX)")
 314
 315                 # check coprocessor escape : TODO
 316                 if (match(opcode, fpu_expr))
 317                         flags = add_flags(flags, "INAT_MODRM")
 318
 319                 # check VEX codes
 320                 if (match(ext, vexonly_expr))
 321                         flags = add_flags(flags, "INAT_VEXOK | INAT_VEXONLY")
 322                 else if (match(ext, vexok_expr) || match(opcode, vexok_opcode_expr))
 323                         flags = add_flags(flags, "INAT_VEXOK")
 324
 325                 # check prefixes
 326                 if (match(ext, prefix_expr)) {
 327                         if (!prefix_num[opcode])
 328                                 semantic_error("Unknown prefix: " opcode)
 329                         flags = add_flags(flags, "INAT_MAKE_PREFIX(" prefix_num[opcode] ")")
 330                 }
 331                 if (length(flags) == 0)
 332                         continue
 333                 # check if last prefix
 334                 if (match(ext, lprefix1_expr)) {
 335                         lptable1[idx] = add_flags(lptable1[idx],flags)
 336                         variant = "INAT_VARIANT"
 337                 }
 338                 if (match(ext, lprefix2_expr)) {
 339                         lptable2[idx] = add_flags(lptable2[idx],flags)
 340                         variant = "INAT_VARIANT"
 341                 }
 342                 if (match(ext, lprefix3_expr)) {
 343                         lptable3[idx] = add_flags(lptable3[idx],flags)
 344                         variant = "INAT_VARIANT"
 345                 }
 346                 if (!match(ext, lprefix_expr)){
 347                         table[idx] = add_flags(table[idx],flags)
 348                 }
 349         }
 350         if (variant)
 351                 table[idx] = add_flags(table[idx],variant)
 352 }
 353
 354 END {
 355         if (awkchecked != "")
 356                 exit 1
 357         # print escape opcode map's array
 358         print "/* Escape opcode map array */"
 359         print "const insn_attr_t * const inat_escape_tables[INAT_ESC_MAX + 1]" \
 360               "[INAT_LSTPFX_MAX + 1] = {"
 361         for (i = 0; i < geid; i++)
 362                 for (j = 0; j < max_lprefix; j++)
 363                         if (etable[i,j])
 364                                 print " ["i"]["j"] = "etable[i,j]","
 365         print "};\n"
 366         # print group opcode map's array
 367         print "/* Group opcode map array */"
 368         print "const insn_attr_t * const inat_group_tables[INAT_GRP_MAX + 1]"\
 369               "[INAT_LSTPFX_MAX + 1] = {"
 370         for (i = 0; i < ggid; i++)
 371                 for (j = 0; j < max_lprefix; j++)
 372                         if (gtable[i,j])
 373                                 print " ["i"]["j"] = "gtable[i,j]","
 374         print "};\n"
 375         # print AVX opcode map's array
 376         print "/* AVX opcode map array */"
 377         print "const insn_attr_t * const inat_avx_tables[X86_VEX_M_MAX + 1]"\
 378               "[INAT_LSTPFX_MAX + 1] = {"
 379         for (i = 0; i < gaid; i++)
 380                 for (j = 0; j < max_lprefix; j++)
 381                         if (atable[i,j])
 382                                 print " ["i"]["j"] = "atable[i,j]","
 383         print "};"
 384 }
 385