sys/kern/makesyscalls.sh

   1 #! /bin/sh -
   2 #       @(#)makesyscalls.sh     8.1 (Berkeley) 6/10/93
   3 # $FreeBSD$
   4
   5 set -e
   6
   7 # name of compat options:
   8 compat=COMPAT_43
   9 compat4=COMPAT_FREEBSD4
  10 compat6=COMPAT_FREEBSD6
  11
  12 # output files:
  13 sysnames="syscalls.c"
  14 sysproto="../sys/sysproto.h"
  15 sysproto_h=_SYS_SYSPROTO_H_
  16 syshdr="../sys/syscall.h"
  17 sysmk="../sys/syscall.mk"
  18 syssw="init_sysent.c"
  19 syscallprefix="SYS_"
  20 switchname="sysent"
  21 namesname="syscallnames"
  22 systrace="systrace_args.c"
  23
  24 # tmp files:
  25 sysaue="sysent.aue.$$"
  26 sysdcl="sysent.dcl.$$"
  27 syscompat="sysent.compat.$$"
  28 syscompatdcl="sysent.compatdcl.$$"
  29 syscompat4="sysent.compat4.$$"
  30 syscompat4dcl="sysent.compat4dcl.$$"
  31 syscompat6="sysent.compat6.$$"
  32 syscompat6dcl="sysent.compat6dcl.$$"
  33 sysent="sysent.switch.$$"
  34 sysinc="sysinc.switch.$$"
  35 sysarg="sysarg.switch.$$"
  36 sysprotoend="sysprotoend.$$"
  37
  38 trap "rm $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $sysent $sysinc $sysarg $sysprotoend" 0
  39
  40 touch $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $sysent $sysinc $sysarg $sysprotoend
  41
  42 case $# in
  43     0)  echo "usage: $0 input-file <config-file>" 1>&2
  44         exit 1
  45         ;;
  46 esac
  47
  48 if [ -n "$2" -a -f "$2" ]; then
  49         . $2
  50 fi
  51
  52 sed -e '
  53 s/\$//g
  54 :join
  55         /\\$/{a\
  56
  57         N
  58         s/\\\n//
  59         b join
  60         }
  61 2,${
  62         /^#/!s/\([{}()*,]\)/ \1 /g
  63 }
  64 ' < $1 | awk "
  65         BEGIN {
  66                 sysaue = \"$sysaue\"
  67                 sysdcl = \"$sysdcl\"
  68                 sysproto = \"$sysproto\"
  69                 sysprotoend = \"$sysprotoend\"
  70                 sysproto_h = \"$sysproto_h\"
  71                 syscompat = \"$syscompat\"
  72                 syscompatdcl = \"$syscompatdcl\"
  73                 syscompat4 = \"$syscompat4\"
  74                 syscompat4dcl = \"$syscompat4dcl\"
  75                 syscompat6 = \"$syscompat6\"
  76                 syscompat6dcl = \"$syscompat6dcl\"
  77                 sysent = \"$sysent\"
  78                 syssw = \"$syssw\"
  79                 sysinc = \"$sysinc\"
  80                 sysarg = \"$sysarg\"
  81                 sysnames = \"$sysnames\"
  82                 syshdr = \"$syshdr\"
  83                 sysmk = \"$sysmk\"
  84                 systrace = \"$systrace\"
  85                 compat = \"$compat\"
  86                 compat4 = \"$compat4\"
  87                 compat6 = \"$compat6\"
  88                 syscallprefix = \"$syscallprefix\"
  89                 switchname = \"$switchname\"
  90                 namesname = \"$namesname\"
  91                 infile = \"$1\"
  92                 "'
  93
  94                 printf "/*\n * System call switch table.\n *\n" > syssw
  95                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > syssw
  96                 printf " * $%s$\n", "FreeBSD" > syssw
  97
  98                 printf "/*\n * System call prototypes.\n *\n" > sysarg
  99                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarg
 100                 printf " * $%s$\n", "FreeBSD" > sysarg
 101
 102                 printf "\n#ifdef %s\n\n", compat > syscompat
 103                 printf "\n#ifdef %s\n\n", compat4 > syscompat4
 104                 printf "\n#ifdef %s\n\n", compat6 > syscompat6
 105
 106                 printf "/*\n * System call names.\n *\n" > sysnames
 107                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
 108                 printf " * $%s$\n", "FreeBSD" > sysnames
 109
 110                 printf "/*\n * System call numbers.\n *\n" > syshdr
 111                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
 112                 printf " * $%s$\n", "FreeBSD" > syshdr
 113                 printf "# FreeBSD system call names.\n" > sysmk
 114                 printf "# DO NOT EDIT-- this file is automatically generated.\n" > sysmk
 115                 printf "# $%s$\n", "FreeBSD" > sysmk
 116
 117                 printf "/*\n * System call argument to DTrace register array converstion.\n *\n" > systrace
 118                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > systrace
 119                 printf " * $%s$\n", "FreeBSD" > systrace
 120         }
 121         NR == 1 {
 122                 gsub("[$]FreeBSD: ", "", $0)
 123                 gsub(" [$]", "", $0)
 124
 125                 printf " * created from%s\n */\n\n", $0 > syssw
 126
 127                 printf "\n/* The casts are bogus but will do for now. */\n" > sysent
 128                 printf "struct sysent %s[] = {\n",switchname > sysent
 129
 130                 printf " * created from%s\n */\n\n", $0 > sysarg
 131                 printf "#ifndef %s\n", sysproto_h > sysarg
 132                 printf "#define\t%s\n\n", sysproto_h > sysarg
 133                 printf "#include <sys/signal.h>\n" > sysarg
 134                 printf "#include <sys/acl.h>\n" > sysarg
 135                 printf "#include <sys/_semaphore.h>\n" > sysarg
 136                 printf "#include <sys/ucontext.h>\n\n" > sysarg
 137                 printf "#include <bsm/audit_kevents.h>\n\n" > sysarg
 138                 printf "struct proc;\n\n" > sysarg
 139                 printf "struct thread;\n\n" > sysarg
 140                 printf "#define\tPAD_(t)\t(sizeof(register_t) <= sizeof(t) ? \\\n" > sysarg
 141                 printf "\t\t0 : sizeof(register_t) - sizeof(t))\n\n" > sysarg
 142                 printf "#if BYTE_ORDER == LITTLE_ENDIAN\n"> sysarg
 143                 printf "#define\tPADL_(t)\t0\n" > sysarg
 144                 printf "#define\tPADR_(t)\tPAD_(t)\n" > sysarg
 145                 printf "#else\n" > sysarg
 146                 printf "#define\tPADL_(t)\tPAD_(t)\n" > sysarg
 147                 printf "#define\tPADR_(t)\t0\n" > sysarg
 148                 printf "#endif\n\n" > sysarg
 149
 150                 printf " * created from%s\n */\n\n", $0 > sysnames
 151                 printf "const char *%s[] = {\n", namesname > sysnames
 152
 153                 printf " * created from%s\n */\n\n", $0 > syshdr
 154
 155                 printf "# created from%s\nMIASM = ", $0 > sysmk
 156
 157                 printf " * This file is part of the DTrace syscall provider.\n */\n\n" > systrace
 158                 printf "static void\nsystrace_args(int sysnum, void *params, u_int64_t *uarg, int *n_args)\n{\n" > systrace
 159                 printf "\tint64_t *iarg  = (int64_t *) uarg;\n" > systrace
 160                 printf "\tswitch (sysnum) {\n" > systrace
 161
 162                 next
 163         }
 164         NF == 0 || $1 ~ /^;/ {
 165                 next
 166         }
 167         $1 ~ /^#[       ]*include/ {
 168                 print > sysinc
 169                 next
 170         }
 171         $1 ~ /^#[       ]*if/ {
 172                 print > sysent
 173                 print > sysdcl
 174                 print > sysarg
 175                 print > syscompat
 176                 print > syscompat4
 177                 print > syscompat6
 178                 print > sysnames
 179                 savesyscall = syscall
 180                 next
 181         }
 182         $1 ~ /^#[       ]*else/ {
 183                 print > sysent
 184                 print > sysdcl
 185                 print > sysarg
 186                 print > syscompat
 187                 print > syscompat4
 188                 print > syscompat6
 189                 print > sysnames
 190                 syscall = savesyscall
 191                 next
 192         }
 193         $1 ~ /^#/ {
 194                 print > sysent
 195                 print > sysdcl
 196                 print > sysarg
 197                 print > syscompat
 198                 print > syscompat4
 199                 print > syscompat6
 200                 print > sysnames
 201                 next
 202         }
 203         syscall != $1 {
 204                 printf "%s: line %d: syscall number out of sync at %d\n",
 205                     infile, NR, syscall
 206                 printf "line is:\n"
 207                 print
 208                 exit 1
 209         }
 210         function align_sysent_comment(column) {
 211                 printf("\t") > sysent
 212                 column = column + 8 - column % 8
 213                 while (column < 56) {
 214                         printf("\t") > sysent
 215                         column = column + 8
 216                 }
 217         }
 218         function parserr(was, wanted) {
 219                 printf "%s: line %d: unexpected %s (expected %s)\n",
 220                     infile, NR, was, wanted
 221                 exit 1
 222         }
 223         function parseline() {
 224                 f=4                     # toss number, type, audit event
 225                 argc= 0;
 226                 argssize = "0"
 227                 if ($NF != "}") {
 228                         funcalias=$(NF-2)
 229                         argalias=$(NF-1)
 230                         rettype=$NF
 231                         end=NF-3
 232                 } else {
 233                         funcalias=""
 234                         argalias=""
 235                         rettype="int"
 236                         end=NF
 237                 }
 238                 if ($3 == "NODEF") {
 239                         auditev="AUE_NULL"
 240                         funcname=$4
 241                         argssize = "AS(" $6 ")"
 242                         return
 243                 }
 244                 if ($f != "{")
 245                         parserr($f, "{")
 246                 f++
 247                 if ($end != "}")
 248                         parserr($end, "}")
 249                 end--
 250                 if ($end != ";")
 251                         parserr($end, ";")
 252                 end--
 253                 if ($end != ")")
 254                         parserr($end, ")")
 255                 end--
 256
 257                 f++     #function return type
 258
 259                 funcname=$f
 260                 if (funcalias == "")
 261                         funcalias = funcname
 262                 if (argalias == "") {
 263                         argalias = funcname "_args"
 264                         if ($3 == "COMPAT")
 265                                 argalias = "o" argalias
 266                         if ($3 == "COMPAT4")
 267                                 argalias = "freebsd4_" argalias
 268                         if ($3 == "COMPAT6")
 269                                 argalias = "freebsd6_" argalias
 270                 }
 271                 f++
 272
 273                 if ($f != "(")
 274                         parserr($f, ")")
 275                 f++
 276
 277                 if (f == end) {
 278                         if ($f != "void")
 279                                 parserr($f, "argument definition")
 280                         return
 281                 }
 282
 283                 while (f <= end) {
 284                         argc++
 285                         argtype[argc]=""
 286                         oldf=""
 287                         while (f < end && $(f+1) != ",") {
 288                                 if (argtype[argc] != "" && oldf != "*")
 289                                         argtype[argc] = argtype[argc]" ";
 290                                 argtype[argc] = argtype[argc]$f;
 291                                 oldf = $f;
 292                                 f++
 293                         }
 294                         if (argtype[argc] == "")
 295                                 parserr($f, "argument definition")
 296                         argname[argc]=$f;
 297                         f += 2;                 # skip name, and any comma
 298                 }
 299                 if (argc != 0)
 300                         argssize = "AS(" argalias ")"
 301         }
 302         {       comment = $4
 303                 if (NF < 7)
 304                         for (i = 5; i <= NF; i++)
 305                                 comment = comment " " $i
 306         }
 307
 308         #
 309         # The AUE_ audit event identifier.
 310         #
 311         {
 312                 auditev = $2;
 313         }
 314
 315         $3 == "STD" || $3 == "NODEF" || $3 == "NOARGS"  || $3 == "NOPROTO" \
 316             || $3 == "NOIMPL" || $3 == "NOSTD" {
 317                 parseline()
 318                 printf("\t/* %s */\n\tcase %d: {\n", funcname, syscall) > systrace
 319                 if (argc > 0) {
 320                         printf("\t\tstruct %s *p = params;\n", argalias) > systrace
 321                         for (i = 1; i <= argc; i++) {
 322                                 if (index(argtype[i], "*") > 0 || argtype[i] == "caddr_t")
 323                                         printf("\t\tuarg[%d] = (intptr_t) p->%s; /* %s */\n", \
 324                                              i - 1, \
 325                                              argname[i], argtype[i]) > systrace
 326                                 else if (substr(argtype[i], 1, 1) == "u" || argtype[i] == "size_t")
 327                                         printf("\t\tuarg[%d] = p->%s; /* %s */\n", \
 328                                              i - 1, \
 329                                              argname[i], argtype[i]) > systrace
 330                                 else
 331                                         printf("\t\tiarg[%d] = p->%s; /* %s */\n", \
 332                                              i - 1, \
 333                                              argname[i], argtype[i]) > systrace
 334                         }
 335                 }
 336                 printf("\t\t*n_args = %d;\n\t\tbreak;\n\t}\n", argc) > systrace
 337                 if ((!nosys || funcname != "nosys") && \
 338                     (funcname != "lkmnosys") && (funcname != "lkmressys")) {
 339                         if (argc != 0 && $3 != "NOARGS" && $3 != "NOPROTO") {
 340                                 printf("struct %s {\n", argalias) > sysarg
 341                                 for (i = 1; i <= argc; i++)
 342                                         printf("\tchar %s_l_[PADL_(%s)]; " \
 343                                             "%s %s; char %s_r_[PADR_(%s)];\n",
 344                                             argname[i], argtype[i],
 345                                             argtype[i], argname[i],
 346                                             argname[i], argtype[i]) > sysarg
 347                                 printf("};\n") > sysarg
 348                         }
 349                         else if ($3 != "NOARGS" && $3 != "NOPROTO" && \
 350                             $3 != "NODEF")
 351                                 printf("struct %s {\n\tregister_t dummy;\n};\n",
 352                                     argalias) > sysarg
 353                 }
 354                 if (($3 != "NOPROTO" && $3 != "NODEF" && \
 355                     (funcname != "nosys" || !nosys)) || \
 356                     (funcname == "lkmnosys" && !lkmnosys) || \
 357                     funcname == "lkmressys") {
 358                         printf("%s\t%s(struct thread *, struct %s *)",
 359                             rettype, funcname, argalias) > sysdcl
 360                         printf(";\n") > sysdcl
 361                         printf("#define\t%sAUE_%s\t%s\n", syscallprefix,
 362                             funcalias, auditev) > sysaue
 363                 }
 364                 if (funcname == "nosys")
 365                         nosys = 1
 366                 if (funcname == "lkmnosys")
 367                         lkmnosys = 1
 368                 printf("\t{ %s, (sy_call_t *)", argssize) > sysent
 369                 column = 8 + 2 + length(argssize) + 15
 370                 if ($3 == "NOIMPL") {
 371                         printf("%s },", "nosys, AUE_NULL, NULL, 0, 0") > sysent
 372                         column = column + length("nosys") + 3
 373                 } else if ($3 == "NOSTD") {
 374                         printf("%s },", "lkmressys, AUE_NULL, NULL, 0, 0") > sysent
 375                         column = column + length("lkmressys") + 3
 376                 } else {
 377                         printf("%s, %s, NULL, 0, 0 },", funcname, auditev) > sysent
 378                         column = column + length(funcname) + length(auditev) + 3
 379                 }
 380                 align_sysent_comment(column)
 381                 printf("/* %d = %s */\n", syscall, funcalias) > sysent
 382                 printf("\t\"%s\",\t\t\t/* %d = %s */\n",
 383                     funcalias, syscall, funcalias) > sysnames
 384                 if ($3 != "NODEF") {
 385                         printf("#define\t%s%s\t%d\n", syscallprefix,
 386                             funcalias, syscall) > syshdr
 387                         printf(" \\\n\t%s.o", funcalias) > sysmk
 388                 }
 389                 syscall++
 390                 next
 391         }
 392         $3 == "COMPAT" || $3 == "COMPAT4" || $3 == "COMPAT6" || $3 == "CPT_NOA" {
 393                 if ($3 == "COMPAT" || $3 == "CPT_NOA") {
 394                         ncompat++
 395                         out = syscompat
 396                         outdcl = syscompatdcl
 397                         wrap = "compat"
 398                         prefix = "o"
 399                 } else if ($3 == "COMPAT4") {
 400                         ncompat4++
 401                         out = syscompat4
 402                         outdcl = syscompat4dcl
 403                         wrap = "compat4"
 404                         prefix = "freebsd4_"
 405                 } else if ($3 == "COMPAT6") {
 406                         ncompat6++
 407                         out = syscompat6
 408                         outdcl = syscompat6dcl
 409                         wrap = "compat6"
 410                         prefix = "freebsd6_"
 411                 }
 412                 parseline()
 413                 if (argc != 0 && $3 != "CPT_NOA") {
 414                         printf("struct %s {\n", argalias) > out
 415                         for (i = 1; i <= argc; i++)
 416                                 printf("\tchar %s_l_[PADL_(%s)]; %s %s; " \
 417                                     "char %s_r_[PADR_(%s)];\n",
 418                                     argname[i], argtype[i],
 419                                     argtype[i], argname[i],
 420                                     argname[i], argtype[i]) > out
 421                         printf("};\n") > out
 422                 }
 423                 else if($3 != "CPT_NOA")
 424                         printf("struct %s {\n\tregister_t dummy;\n};\n",
 425                             argalias) > sysarg
 426                 printf("%s\t%s%s(struct thread *, struct %s *);\n",
 427                     rettype, prefix, funcname, argalias) > outdcl
 428                 printf("\t{ %s(%s,%s), %s, NULL, 0, 0 },",
 429                     wrap, argssize, funcname, auditev) > sysent
 430                 align_sysent_comment(8 + 9 + \
 431                     length(argssize) + 1 + length(funcname) + length(auditev) + 4)
 432                 printf("/* %d = old %s */\n", syscall, funcalias) > sysent
 433                 printf("\t\"%s.%s\",\t\t/* %d = old %s */\n",
 434                     wrap, funcalias, syscall, funcalias) > sysnames
 435                 if ($3 == "COMPAT" || $3 == "CPT_NOA") {
 436                         printf("\t\t\t\t/* %d is old %s */\n",
 437                             syscall, funcalias) > syshdr
 438                 } else {
 439                         printf("#define\t%s%s%s\t%d\n", syscallprefix,
 440                             prefix, funcalias, syscall) > syshdr
 441                         printf(" \\\n\t%s%s.o", prefix, funcalias) > sysmk
 442                 }
 443                 syscall++
 444                 next
 445         }
 446         $3 == "LIBCOMPAT" {
 447                 ncompat++
 448                 parseline()
 449                 printf("%s\to%s();\n", rettype, funcname) > syscompatdcl
 450                 printf("\t{ compat(%s,%s), %s, NULL, 0, 0 },",
 451                     argssize, funcname, auditev) > sysent
 452                 align_sysent_comment(8 + 9 + \
 453                     length(argssize) + 1 + length(funcname) + length(auditev) + 4)
 454                 printf("/* %d = old %s */\n", syscall, funcalias) > sysent
 455                 printf("\t\"old.%s\",\t\t/* %d = old %s */\n",
 456                     funcalias, syscall, funcalias) > sysnames
 457                 printf("#define\t%s%s\t%d\t/* compatibility; still used by libc */\n",
 458                     syscallprefix, funcalias, syscall) > syshdr
 459                 printf(" \\\n\t%s.o", funcalias) > sysmk
 460                 syscall++
 461                 next
 462         }
 463         $3 == "OBSOL" {
 464                 printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0 },") > sysent
 465                 align_sysent_comment(34)
 466                 printf("/* %d = obsolete %s */\n", syscall, comment) > sysent
 467                 printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n",
 468                     $4, syscall, comment) > sysnames
 469                 printf("\t\t\t\t/* %d is obsolete %s */\n",
 470                     syscall, comment) > syshdr
 471                 syscall++
 472                 next
 473         }
 474         $3 == "UNIMPL" {
 475                 printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0 },\t\t\t/* %d = %s */\n",
 476                     syscall, comment) > sysent
 477                 printf("\t\"#%d\",\t\t\t/* %d = %s */\n",
 478                     syscall, syscall, comment) > sysnames
 479                 syscall++
 480                 next
 481         }
 482         {
 483                 printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $3
 484                 exit 1
 485         }
 486         END {
 487                 printf "\n#define AS(name) (sizeof(struct name) / sizeof(register_t))\n" > sysinc
 488
 489                 if (ncompat != 0 || ncompat4 != 0 || ncompat6 != 0)
 490                         printf "#include \"opt_compat.h\"\n\n" > syssw
 491                 printf "#include \<bsm/audit_kevents.h\>\n" > syssw
 492
 493                 if (ncompat != 0) {
 494                         printf "\n#ifdef %s\n", compat > sysinc
 495                         printf "#define compat(n, name) n, (sy_call_t *)__CONCAT(o,name)\n" > sysinc
 496                         printf "#else\n" > sysinc
 497                         printf "#define compat(n, name) 0, (sy_call_t *)nosys\n" > sysinc
 498                         printf "#endif\n" > sysinc
 499                 }
 500
 501                 if (ncompat4 != 0) {
 502                         printf "\n#ifdef %s\n", compat4 > sysinc
 503                         printf "#define compat4(n, name) n, (sy_call_t *)__CONCAT(freebsd4_,name)\n" > sysinc
 504                         printf "#else\n" > sysinc
 505                         printf "#define compat4(n, name) 0, (sy_call_t *)nosys\n" > sysinc
 506                         printf "#endif\n" > sysinc
 507                 }
 508
 509                 if (ncompat6 != 0) {
 510                         printf "\n#ifdef %s\n", compat6 > sysinc
 511                         printf "#define compat6(n, name) n, (sy_call_t *)__CONCAT(freebsd6_,name)\n" > sysinc
 512                         printf "#else\n" > sysinc
 513                         printf "#define compat6(n, name) 0, (sy_call_t *)nosys\n" > sysinc
 514                         printf "#endif\n" > sysinc
 515                 }
 516
 517                 printf("\n#endif /* %s */\n\n", compat) > syscompatdcl
 518                 printf("\n#endif /* %s */\n\n", compat4) > syscompat4dcl
 519                 printf("\n#endif /* %s */\n\n", compat6) > syscompat6dcl
 520
 521                 printf("\n#undef PAD_\n") > sysprotoend
 522                 printf("#undef PADL_\n") > sysprotoend
 523                 printf("#undef PADR_\n") > sysprotoend
 524                 printf("\n#endif /* !%s */\n", sysproto_h) > sysprotoend
 525
 526                 printf("\n") > sysmk
 527                 printf("};\n") > sysent
 528                 printf("};\n") > sysnames
 529                 printf("#define\t%sMAXSYSCALL\t%d\n", syscallprefix, syscall) \
 530                     > syshdr
 531                 printf "\tdefault:\n\t\t*n_args = 0;\n\t\tbreak;\n\t};\n}\n" > systrace
 532         } '
 533
 534 cat $sysinc $sysent >> $syssw
 535 cat $sysarg $sysdcl \
 536         $syscompat $syscompatdcl \
 537         $syscompat4 $syscompat4dcl \
 538         $syscompat6 $syscompat6dcl \
 539         $sysaue $sysprotoend > $sysproto
 540