kernel/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|66\\&F2)\\)"
  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["XACQUIRE"] = "INAT_PFX_REPNE"
  87         prefix_num["XRELEASE"] = "INAT_PFX_REPE"
  88         prefix_num["LOCK"] = "INAT_PFX_LOCK"
  89         prefix_num["SEG=CS"] = "INAT_PFX_CS"
  90         prefix_num["SEG=DS"] = "INAT_PFX_DS"
  91         prefix_num["SEG=ES"] = "INAT_PFX_ES"
  92         prefix_num["SEG=FS"] = "INAT_PFX_FS"
  93         prefix_num["SEG=GS"] = "INAT_PFX_GS"
  94         prefix_num["SEG=SS"] = "INAT_PFX_SS"
  95         prefix_num["Address-Size"] = "INAT_PFX_ADDRSZ"
  96         prefix_num["VEX+1byte"] = "INAT_PFX_VEX2"
  97         prefix_num["VEX+2byte"] = "INAT_PFX_VEX3"
  98
  99         clear_vars()
 100 }
 101
 102 function semantic_error(msg) {
 103         print "Semantic error at " NR ": " msg > "/dev/stderr"
 104         exit 1
 105 }
 106
 107 function debug(msg) {
 108         print "DEBUG: " msg
 109 }
 110
 111 function array_size(arr,   i,c) {
 112         c = 0
 113         for (i in arr)
 114                 c++
 115         return c
 116 }
 117
 118 /^Table:/ {
 119         print "/* " $0 " */"
 120         if (tname != "")
 121                 semantic_error("Hit Table: before EndTable:.");
 122 }
 123
 124 /^Referrer:/ {
 125         if (NF != 1) {
 126                 # escape opcode table
 127                 ref = ""
 128                 for (i = 2; i <= NF; i++)
 129                         ref = ref $i
 130                 eid = escape[ref]
 131                 tname = sprintf("inat_escape_table_%d", eid)
 132         }
 133 }
 134
 135 /^AVXcode:/ {
 136         if (NF != 1) {
 137                 # AVX/escape opcode table
 138                 aid = $2
 139                 if (gaid <= aid)
 140                         gaid = aid + 1
 141                 if (tname == "")        # AVX only opcode table
 142                         tname = sprintf("inat_avx_table_%d", $2)
 143         }
 144         if (aid == -1 && eid == -1)     # primary opcode table
 145                 tname = "inat_primary_table"
 146 }
 147
 148 /^GrpTable:/ {
 149         print "/* " $0 " */"
 150         if (!($2 in group))
 151                 semantic_error("No group: " $2 )
 152         gid = group[$2]
 153         tname = "inat_group_table_" gid
 154 }
 155
 156 function print_table(tbl,name,fmt,n)
 157 {
 158         print "const insn_attr_t " name " = {"
 159         for (i = 0; i < n; i++) {
 160                 id = sprintf(fmt, i)
 161                 if (tbl[id])
 162                         print " [" id "] = " tbl[id] ","
 163         }
 164         print "};"
 165 }
 166
 167 /^EndTable/ {
 168         if (gid != -1) {
 169                 # print group tables
 170                 if (array_size(table) != 0) {
 171                         print_table(table, tname "[INAT_GROUP_TABLE_SIZE]",
 172                                     "0x%x", 8)
 173                         gtable[gid,0] = tname
 174                 }
 175                 if (array_size(lptable1) != 0) {
 176                         print_table(lptable1, tname "_1[INAT_GROUP_TABLE_SIZE]",
 177                                     "0x%x", 8)
 178                         gtable[gid,1] = tname "_1"
 179                 }
 180                 if (array_size(lptable2) != 0) {
 181                         print_table(lptable2, tname "_2[INAT_GROUP_TABLE_SIZE]",
 182                                     "0x%x", 8)
 183                         gtable[gid,2] = tname "_2"
 184                 }
 185                 if (array_size(lptable3) != 0) {
 186                         print_table(lptable3, tname "_3[INAT_GROUP_TABLE_SIZE]",
 187                                     "0x%x", 8)
 188                         gtable[gid,3] = tname "_3"
 189                 }
 190         } else {
 191                 # print primary/escaped tables
 192                 if (array_size(table) != 0) {
 193                         print_table(table, tname "[INAT_OPCODE_TABLE_SIZE]",
 194                                     "0x%02x", 256)
 195                         etable[eid,0] = tname
 196                         if (aid >= 0)
 197                                 atable[aid,0] = tname
 198                 }
 199                 if (array_size(lptable1) != 0) {
 200                         print_table(lptable1,tname "_1[INAT_OPCODE_TABLE_SIZE]",
 201                                     "0x%02x", 256)
 202                         etable[eid,1] = tname "_1"
 203                         if (aid >= 0)
 204                                 atable[aid,1] = tname "_1"
 205                 }
 206                 if (array_size(lptable2) != 0) {
 207                         print_table(lptable2,tname "_2[INAT_OPCODE_TABLE_SIZE]",
 208                                     "0x%02x", 256)
 209                         etable[eid,2] = tname "_2"
 210                         if (aid >= 0)
 211                                 atable[aid,2] = tname "_2"
 212                 }
 213                 if (array_size(lptable3) != 0) {
 214                         print_table(lptable3,tname "_3[INAT_OPCODE_TABLE_SIZE]",
 215                                     "0x%02x", 256)
 216                         etable[eid,3] = tname "_3"
 217                         if (aid >= 0)
 218                                 atable[aid,3] = tname "_3"
 219                 }
 220         }
 221         print ""
 222         clear_vars()
 223 }
 224
 225 function add_flags(old,new) {
 226         if (old && new)
 227                 return old " | " new
 228         else if (old)
 229                 return old
 230         else
 231                 return new
 232 }
 233
 234 # convert operands to flags.
 235 function convert_operands(count,opnd,       i,j,imm,mod)
 236 {
 237         imm = null
 238         mod = null
 239         for (j = 1; j <= count; j++) {
 240                 i = opnd[j]
 241                 if (match(i, imm_expr) == 1) {
 242                         if (!imm_flag[i])
 243                                 semantic_error("Unknown imm opnd: " i)
 244                         if (imm) {
 245                                 if (i != "Ib")
 246                                         semantic_error("Second IMM error")
 247                                 imm = add_flags(imm, "INAT_SCNDIMM")
 248                         } else
 249                                 imm = imm_flag[i]
 250                 } else if (match(i, modrm_expr))
 251                         mod = "INAT_MODRM"
 252         }
 253         return add_flags(imm, mod)
 254 }
 255
 256 /^[0-9a-f]+\:/ {
 257         if (NR == 1)
 258                 next
 259         # get index
 260         idx = "0x" substr($1, 1, index($1,":") - 1)
 261         if (idx in table)
 262                 semantic_error("Redefine " idx " in " tname)
 263
 264         # check if escaped opcode
 265         if ("escape" == $2) {
 266                 if ($3 != "#")
 267                         semantic_error("No escaped name")
 268                 ref = ""
 269                 for (i = 4; i <= NF; i++)
 270                         ref = ref $i
 271                 if (ref in escape)
 272                         semantic_error("Redefine escape (" ref ")")
 273                 escape[ref] = geid
 274                 geid++
 275                 table[idx] = "INAT_MAKE_ESCAPE(" escape[ref] ")"
 276                 next
 277         }
 278
 279         variant = null
 280         # converts
 281         i = 2
 282         while (i <= NF) {
 283                 opcode = $(i++)
 284                 delete opnds
 285                 ext = null
 286                 flags = null
 287                 opnd = null
 288                 # parse one opcode
 289                 if (match($i, opnd_expr)) {
 290                         opnd = $i
 291                         count = split($(i++), opnds, ",")
 292                         flags = convert_operands(count, opnds)
 293                 }
 294                 if (match($i, ext_expr))
 295                         ext = $(i++)
 296                 if (match($i, sep_expr))
 297                         i++
 298                 else if (i < NF)
 299                         semantic_error($i " is not a separator")
 300
 301                 # check if group opcode
 302                 if (match(opcode, group_expr)) {
 303                         if (!(opcode in group)) {
 304                                 group[opcode] = ggid
 305                                 ggid++
 306                         }
 307                         flags = add_flags(flags, "INAT_MAKE_GROUP(" group[opcode] ")")
 308                 }
 309                 # check force(or default) 64bit
 310                 if (match(ext, force64_expr))
 311                         flags = add_flags(flags, "INAT_FORCE64")
 312
 313                 # check REX prefix
 314                 if (match(opcode, rex_expr))
 315                         flags = add_flags(flags, "INAT_MAKE_PREFIX(INAT_PFX_REX)")
 316
 317                 # check coprocessor escape : TODO
 318                 if (match(opcode, fpu_expr))
 319                         flags = add_flags(flags, "INAT_MODRM")
 320
 321                 # check VEX codes
 322                 if (match(ext, vexonly_expr))
 323                         flags = add_flags(flags, "INAT_VEXOK | INAT_VEXONLY")
 324                 else if (match(ext, vexok_expr) || match(opcode, vexok_opcode_expr))
 325                         flags = add_flags(flags, "INAT_VEXOK")
 326
 327                 # check prefixes
 328                 if (match(ext, prefix_expr)) {
 329                         if (!prefix_num[opcode])
 330                                 semantic_error("Unknown prefix: " opcode)
 331                         flags = add_flags(flags, "INAT_MAKE_PREFIX(" prefix_num[opcode] ")")
 332                 }
 333                 if (length(flags) == 0)
 334                         continue
 335                 # check if last prefix
 336                 if (match(ext, lprefix1_expr)) {
 337                         lptable1[idx] = add_flags(lptable1[idx],flags)
 338                         variant = "INAT_VARIANT"
 339                 }
 340                 if (match(ext, lprefix2_expr)) {
 341                         lptable2[idx] = add_flags(lptable2[idx],flags)
 342                         variant = "INAT_VARIANT"
 343                 }
 344                 if (match(ext, lprefix3_expr)) {
 345                         lptable3[idx] = add_flags(lptable3[idx],flags)
 346                         variant = "INAT_VARIANT"
 347                 }
 348                 if (!match(ext, lprefix_expr)){
 349                         table[idx] = add_flags(table[idx],flags)
 350                 }
 351         }
 352         if (variant)
 353                 table[idx] = add_flags(table[idx],variant)
 354 }
 355
 356 END {
 357         if (awkchecked != "")
 358                 exit 1
 359         # print escape opcode map's array
 360         print "/* Escape opcode map array */"
 361         print "const insn_attr_t * const inat_escape_tables[INAT_ESC_MAX + 1]" \
 362               "[INAT_LSTPFX_MAX + 1] = {"
 363         for (i = 0; i < geid; i++)
 364                 for (j = 0; j < max_lprefix; j++)
 365                         if (etable[i,j])
 366                                 print " ["i"]["j"] = "etable[i,j]","
 367         print "};\n"
 368         # print group opcode map's array
 369         print "/* Group opcode map array */"
 370         print "const insn_attr_t * const inat_group_tables[INAT_GRP_MAX + 1]"\
 371               "[INAT_LSTPFX_MAX + 1] = {"
 372         for (i = 0; i < ggid; i++)
 373                 for (j = 0; j < max_lprefix; j++)
 374                         if (gtable[i,j])
 375                                 print " ["i"]["j"] = "gtable[i,j]","
 376         print "};\n"
 377         # print AVX opcode map's array
 378         print "/* AVX opcode map array */"
 379         print "const insn_attr_t * const inat_avx_tables[X86_VEX_M_MAX + 1]"\
 380               "[INAT_LSTPFX_MAX + 1] = {"
 381         for (i = 0; i < gaid; i++)
 382                 for (j = 0; j < max_lprefix; j++)
 383                         if (atable[i,j])
 384                                 print " ["i"]["j"] = "atable[i,j]","
 385         print "};"
 386 }
 387