The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/makesyscalls.sh

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    1 #! /bin/sh -
    2 #       @(#)makesyscalls.sh     8.1 (Berkeley) 6/10/93
    3 # $FreeBSD: releng/5.0/sys/kern/makesyscalls.sh 106149 2002-10-29 15:47:06Z dwmalone $
    4 
    5 set -e
    6 
    7 # name of compat options:
    8 compat=COMPAT_43
    9 compat4=COMPAT_FREEBSD4
   10 
   11 # output files:
   12 sysnames="syscalls.c"
   13 sysproto="../sys/sysproto.h"
   14 sysproto_h=_SYS_SYSPROTO_H_
   15 syshdr="../sys/syscall.h"
   16 sysmk="../sys/syscall.mk"
   17 syssw="init_sysent.c"
   18 syscallprefix="SYS_"
   19 switchname="sysent"
   20 namesname="syscallnames"
   21 
   22 # tmp files:
   23 sysdcl="sysent.dcl.$$"
   24 syscompat="sysent.compat.$$"
   25 syscompatdcl="sysent.compatdcl.$$"
   26 syscompat4="sysent.compat4.$$"
   27 syscompat4dcl="sysent.compat4dcl.$$"
   28 sysent="sysent.switch.$$"
   29 sysinc="sysinc.switch.$$"
   30 sysarg="sysarg.switch.$$"
   31 sysprotoend="sysprotoend.$$"
   32 
   33 trap "rm $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $sysent $sysinc $sysarg $sysprotoend" 0
   34 
   35 touch $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $sysent $sysinc $sysarg $sysprotoend
   36 
   37 case $# in
   38     0)  echo "usage: $0 input-file <config-file>" 1>&2
   39         exit 1
   40         ;;
   41 esac
   42 
   43 if [ -n "$2" -a -f "$2" ]; then
   44         . $2
   45 fi
   46 
   47 sed -e '
   48 s/\$//g
   49 :join
   50         /\\$/{a\
   51 
   52         N
   53         s/\\\n//
   54         b join
   55         }
   56 2,${
   57         /^#/!s/\([{}()*,]\)/ \1 /g
   58 }
   59 ' < $1 | awk "
   60         BEGIN {
   61                 sysdcl = \"$sysdcl\"
   62                 sysproto = \"$sysproto\"
   63                 sysprotoend = \"$sysprotoend\"
   64                 sysproto_h = \"$sysproto_h\"
   65                 syscompat = \"$syscompat\"
   66                 syscompatdcl = \"$syscompatdcl\"
   67                 syscompat4 = \"$syscompat4\"
   68                 syscompat4dcl = \"$syscompat4dcl\"
   69                 sysent = \"$sysent\"
   70                 syssw = \"$syssw\"
   71                 sysinc = \"$sysinc\"
   72                 sysarg = \"$sysarg\"
   73                 sysnames = \"$sysnames\"
   74                 syshdr = \"$syshdr\"
   75                 sysmk = \"$sysmk\"
   76                 compat = \"$compat\"
   77                 compat4 = \"$compat4\"
   78                 syscallprefix = \"$syscallprefix\"
   79                 switchname = \"$switchname\"
   80                 namesname = \"$namesname\"
   81                 infile = \"$1\"
   82                 "'
   83 
   84                 printf "/*\n * System call switch table.\n *\n" > syssw
   85                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > syssw
   86                 printf " * $%s$\n", "FreeBSD" > syssw
   87 
   88                 printf "/*\n * System call prototypes.\n *\n" > sysarg
   89                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarg
   90                 printf " * $%s$\n", "FreeBSD" > sysarg
   91 
   92                 printf "\n#ifdef %s\n\n", compat > syscompat
   93                 printf "\n#ifdef %s\n\n", compat4 > syscompat4
   94 
   95                 printf "/*\n * System call names.\n *\n" > sysnames
   96                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
   97                 printf " * $%s$\n", "FreeBSD" > sysnames
   98 
   99                 printf "/*\n * System call numbers.\n *\n" > syshdr
  100                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
  101                 printf " * $%s$\n", "FreeBSD" > syshdr
  102                 printf "# FreeBSD system call names.\n" > sysmk
  103                 printf "# DO NOT EDIT-- this file is automatically generated.\n" > sysmk
  104                 printf "# $%s$\n", "FreeBSD" > sysmk
  105         }
  106         NR == 1 {
  107                 gsub("[$]FreeBSD: ", "", $0)
  108                 gsub(" [$]", "", $0)
  109 
  110                 printf " * created from%s\n */\n\n", $0 > syssw
  111 
  112                 printf "\n/* The casts are bogus but will do for now. */\n" > sysent
  113                 printf "struct sysent %s[] = {\n",switchname > sysent
  114 
  115                 printf " * created from%s\n */\n\n", $0 > sysarg
  116                 printf "#ifndef %s\n", sysproto_h > sysarg
  117                 printf "#define\t%s\n\n", sysproto_h > sysarg
  118                 printf "#include <sys/signal.h>\n" > sysarg
  119                 printf "#include <sys/acl.h>\n" > sysarg
  120                 printf "#include <posix4/_semaphore.h>\n\n" > sysarg
  121                 printf "struct proc;\n\n" > sysarg
  122                 printf "struct thread;\n\n" > sysarg
  123                 printf "#define\tPAD_(t)\t(sizeof(register_t) <= sizeof(t) ? \\\n" > sysarg
  124                 printf "\t\t0 : sizeof(register_t) - sizeof(t))\n\n" > sysarg
  125                 printf "#if BYTE_ORDER == LITTLE_ENDIAN\n"> sysarg
  126                 printf "#define\tPADL_(t)\t0\n" > sysarg
  127                 printf "#define\tPADR_(t)\tPAD_(t)\n" > sysarg
  128                 printf "#else\n" > sysarg
  129                 printf "#define\tPADL_(t)\tPAD_(t)\n" > sysarg
  130                 printf "#define\tPADR_(t)\t0\n" > sysarg
  131                 printf "#endif\n\n" > sysarg
  132 
  133                 printf " * created from%s\n */\n\n", $0 > sysnames
  134                 printf "const char *%s[] = {\n", namesname > sysnames
  135 
  136                 printf " * created from%s\n */\n\n", $0 > syshdr
  137 
  138                 printf "# created from%s\nMIASM = ", $0 > sysmk
  139 
  140                 next
  141         }
  142         NF == 0 || $1 ~ /^;/ {
  143                 next
  144         }
  145         $1 ~ /^#[       ]*include/ {
  146                 print > sysinc
  147                 next
  148         }
  149         $1 ~ /^#[       ]*if/ {
  150                 print > sysent
  151                 print > sysdcl
  152                 print > sysarg
  153                 print > syscompat
  154                 print > syscompat4
  155                 print > sysnames
  156                 savesyscall = syscall
  157                 next
  158         }
  159         $1 ~ /^#[       ]*else/ {
  160                 print > sysent
  161                 print > sysdcl
  162                 print > sysarg
  163                 print > syscompat
  164                 print > syscompat4
  165                 print > sysnames
  166                 syscall = savesyscall
  167                 next
  168         }
  169         $1 ~ /^#/ {
  170                 print > sysent
  171                 print > sysdcl
  172                 print > sysarg
  173                 print > syscompat
  174                 print > syscompat4
  175                 print > sysnames
  176                 next
  177         }
  178         syscall != $1 {
  179                 printf "%s: line %d: syscall number out of sync at %d\n",
  180                     infile, NR, syscall
  181                 printf "line is:\n"
  182                 print
  183                 exit 1
  184         }
  185         function align_sysent_comment(column) {
  186                 printf("\t") > sysent
  187                 column = column + 8 - column % 8
  188                 while (column < 56) {
  189                         printf("\t") > sysent
  190                         column = column + 8
  191                 }
  192         }
  193         function parserr(was, wanted) {
  194                 printf "%s: line %d: unexpected %s (expected %s)\n",
  195                     infile, NR, was, wanted
  196                 exit 1
  197         }
  198         function parseline() {
  199                 f=4                     # toss number and type
  200                 argc= 0;
  201                 argssize = "0"
  202                 if ($NF != "}") {
  203                         funcalias=$(NF-2)
  204                         argalias=$(NF-1)
  205                         rettype=$NF
  206                         end=NF-3
  207                 } else {
  208                         funcalias=""
  209                         argalias=""
  210                         rettype="int"
  211                         end=NF
  212                 }
  213                 if ($2 == "NODEF") {
  214                         funcname=$4
  215                         argssize = "AS(" $6 ")"
  216                         return
  217                 }
  218                 if ($f != "{")
  219                         parserr($f, "{")
  220                 f++
  221                 if ($end != "}")
  222                         parserr($end, "}")
  223                 end--
  224                 if ($end != ";")
  225                         parserr($end, ";")
  226                 end--
  227                 if ($end != ")")
  228                         parserr($end, ")")
  229                 end--
  230 
  231                 f++     #function return type
  232 
  233                 funcname=$f
  234                 if (funcalias == "")
  235                         funcalias = funcname
  236                 if (argalias == "") {
  237                         argalias = funcname "_args"
  238                         if ($2 == "COMPAT")
  239                                 argalias = "o" argalias
  240                         if ($2 == "COMPAT4")
  241                                 argalias = "freebsd4_" argalias
  242                 }
  243                 f++
  244 
  245                 if ($f != "(")
  246                         parserr($f, ")")
  247                 f++
  248 
  249                 if (f == end) {
  250                         if ($f != "void")
  251                                 parserr($f, "argument definition")
  252                         return
  253                 }
  254 
  255                 while (f <= end) {
  256                         argc++
  257                         argtype[argc]=""
  258                         oldf=""
  259                         while (f < end && $(f+1) != ",") {
  260                                 if (argtype[argc] != "" && oldf != "*")
  261                                         argtype[argc] = argtype[argc]" ";
  262                                 argtype[argc] = argtype[argc]$f;
  263                                 oldf = $f;
  264                                 f++
  265                         }
  266                         if (argtype[argc] == "")
  267                                 parserr($f, "argument definition")
  268                         argname[argc]=$f;
  269                         f += 2;                 # skip name, and any comma
  270                 }
  271                 if (argc != 0)
  272                         argssize = "AS(" argalias ")"
  273         }
  274         {       comment = $4
  275                 if (NF < 7)
  276                         for (i = 5; i <= NF; i++)
  277                                 comment = comment " " $i
  278         }
  279 
  280         # The 'M' type prefix
  281         #
  282         {
  283                 mpsafe = "SYF_MPSAFE | ";
  284                 if ($2 == "MSTD") {
  285                         $2 = "STD";
  286                 } else if ($2 == "MNODEF") {
  287                         $2 = "NODEF";
  288                 } else if ($2 == "MNOARGS") {
  289                         $2 = "NOARGS";
  290                 } else if ($2 == "MNOPROTO") {
  291                         $2 = "NOPROTO";
  292                 } else if ($2 == "MNOIMPL") {
  293                         $2 = "NOIMPL";
  294                 } else if ($2 == "MNOSTD") {
  295                         $2 = "NOSTD";
  296                 } else if ($2 == "MCOMPAT") {
  297                         $2 = "COMPAT";
  298                 } else if ($2 == "MCOMPAT4") {
  299                         $2 = "COMPAT4";
  300                 } else if ($2 == "MCPT_NOA") {
  301                         $2 = "CPT_NOA";
  302                 } else if ($2 == "MLIBCOMPAT") {
  303                         $2 = "LIBCOMPAT";
  304                 } else if ($2 == "MOBSOL") {
  305                         $2 = "OBSOL";
  306                 } else if ($2 == "MUNIMPL") {
  307                         $2 = "UNIMPL";
  308                 } else {
  309                         mpsafe = "";
  310                 }
  311         }
  312         $2 == "STD" || $2 == "NODEF" || $2 == "NOARGS"  || $2 == "NOPROTO" \
  313             || $2 == "NOIMPL" || $2 == "NOSTD" {
  314                 parseline()
  315                 if ((!nosys || funcname != "nosys") && \
  316                     (funcname != "lkmnosys") && (funcname != "lkmressys")) {
  317                         if (argc != 0 && $2 != "NOARGS" && $2 != "NOPROTO") {
  318                                 printf("struct %s {\n", argalias) > sysarg
  319                                 for (i = 1; i <= argc; i++)
  320                                         printf("\tchar %s_l_[PADL_(%s)]; " \
  321                                             "%s %s; char %s_r_[PADR_(%s)];\n",
  322                                             argname[i], argtype[i],
  323                                             argtype[i], argname[i],
  324                                             argname[i], argtype[i]) > sysarg
  325                                 printf("};\n") > sysarg
  326                         }
  327                         else if ($2 != "NOARGS" && $2 != "NOPROTO" && \
  328                             $2 != "NODEF")
  329                                 printf("struct %s {\n\tregister_t dummy;\n};\n",
  330                                     argalias) > sysarg
  331                 }
  332                 if (($2 != "NOPROTO" && $2 != "NODEF" && \
  333                     (funcname != "nosys" || !nosys)) || \
  334                     (funcname == "lkmnosys" && !lkmnosys) || \
  335                     funcname == "lkmressys") {
  336                         printf("%s\t%s(struct thread *, struct %s *)",
  337                             rettype, funcname, argalias) > sysdcl
  338                         printf(";\n") > sysdcl
  339                 }
  340                 if (funcname == "nosys")
  341                         nosys = 1
  342                 if (funcname == "lkmnosys")
  343                         lkmnosys = 1
  344                 printf("\t{ %s%s, (sy_call_t *)", mpsafe, argssize) > sysent
  345                 column = 8 + 2 + length(mpsafe) + length(argssize) + 15
  346                 if ($2 == "NOIMPL") {
  347                         printf("%s },", "nosys") > sysent
  348                         column = column + length("nosys") + 3
  349                 } else if ($2 == "NOSTD") {
  350                         printf("%s },", "lkmressys") > sysent
  351                         column = column + length("lkmressys") + 3
  352                 } else {
  353                         printf("%s },", funcname) > sysent
  354                         column = column + length(funcname) + 3
  355                 } 
  356                 align_sysent_comment(column)
  357                 printf("/* %d = %s */\n", syscall, funcalias) > sysent
  358                 printf("\t\"%s\",\t\t\t/* %d = %s */\n",
  359                     funcalias, syscall, funcalias) > sysnames
  360                 if ($2 != "NODEF") {
  361                         printf("#define\t%s%s\t%d\n", syscallprefix,
  362                             funcalias, syscall) > syshdr
  363                         printf(" \\\n\t%s.o", funcalias) > sysmk
  364                 }
  365                 syscall++
  366                 next
  367         }
  368         $2 == "COMPAT" || $2 == "COMPAT4" || $2 == "CPT_NOA" {
  369                 if ($2 == "COMPAT" || $2 == "CPT_NOA") {
  370                         ncompat++
  371                         out = syscompat
  372                         outdcl = syscompatdcl
  373                         wrap = "compat"
  374                         prefix = "o"
  375                 } else if ($2 == "COMPAT4") {
  376                         ncompat4++
  377                         out = syscompat4
  378                         outdcl = syscompat4dcl
  379                         wrap = "compat4"
  380                         prefix = "freebsd4_"
  381                 }
  382                 parseline()
  383                 if (argc != 0 && $2 != "CPT_NOA") {
  384                         printf("struct %s {\n", argalias) > out
  385                         for (i = 1; i <= argc; i++)
  386                                 printf("\tchar %s_l_[PADL_(%s)]; %s %s; " \
  387                                     "char %s_r_[PADR_(%s)];\n",
  388                                     argname[i], argtype[i],
  389                                     argtype[i], argname[i],
  390                                     argname[i], argtype[i]) > out
  391                         printf("};\n") > out
  392                 }
  393                 else if($2 != "CPT_NOA")
  394                         printf("struct %s {\n\tregister_t dummy;\n};\n",
  395                             argalias) > sysarg
  396                 printf("%s\t%s%s(struct thread *, struct %s *);\n",
  397                     rettype, prefix, funcname, argalias) > outdcl
  398                 printf("\t{ %s(%s%s,%s) },",
  399                     wrap, mpsafe, argssize, funcname) > sysent
  400                 align_sysent_comment(8 + 9 + length(mpsafe) + \
  401                     length(argssize) + 1 + length(funcname) + 4)
  402                 printf("/* %d = old %s */\n", syscall, funcalias) > sysent
  403                 printf("\t\"old.%s\",\t\t/* %d = old %s */\n",
  404                     funcalias, syscall, funcalias) > sysnames
  405                 printf("\t\t\t\t/* %d is old %s */\n",
  406                     syscall, funcalias) > syshdr
  407                 syscall++
  408                 next
  409         }
  410         $2 == "LIBCOMPAT" {
  411                 ncompat++
  412                 parseline()
  413                 printf("%s\to%s();\n", rettype, funcname) > syscompatdcl
  414                 printf("\t{ compat(%s%s,%s) },",
  415                     mpsafe, argssize, funcname) > sysent
  416                 align_sysent_comment(8 + 9 + length(mpsafe) + \
  417                     length(argssize) + 1 + length(funcname) + 4)
  418                 printf("/* %d = old %s */\n", syscall, funcalias) > sysent
  419                 printf("\t\"old.%s\",\t\t/* %d = old %s */\n",
  420                     funcalias, syscall, funcalias) > sysnames
  421                 printf("#define\t%s%s\t%d\t/* compatibility; still used by libc */\n",
  422                     syscallprefix, funcalias, syscall) > syshdr
  423                 printf(" \\\n\t%s.o", funcalias) > sysmk
  424                 syscall++
  425                 next
  426         }
  427         $2 == "OBSOL" {
  428                 printf("\t{ 0, (sy_call_t *)nosys },") > sysent
  429                 align_sysent_comment(34)
  430                 printf("/* %d = obsolete %s */\n", syscall, comment) > sysent
  431                 printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n",
  432                     $4, syscall, comment) > sysnames
  433                 printf("\t\t\t\t/* %d is obsolete %s */\n",
  434                     syscall, comment) > syshdr
  435                 syscall++
  436                 next
  437         }
  438         $2 == "UNIMPL" {
  439                 printf("\t{ 0, (sy_call_t *)nosys },\t\t\t/* %d = %s */\n",
  440                     syscall, comment) > sysent
  441                 printf("\t\"#%d\",\t\t\t/* %d = %s */\n",
  442                     syscall, syscall, comment) > sysnames
  443                 syscall++
  444                 next
  445         }
  446         {
  447                 printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2
  448                 exit 1
  449         }
  450         END {
  451                 printf "\n#define AS(name) (sizeof(struct name) / sizeof(register_t))\n" > sysinc
  452 
  453                 if (ncompat != 0 || ncompat4 != 0)
  454                         printf "#include \"opt_compat.h\"\n\n" > syssw
  455 
  456                 if (ncompat != 0) {
  457                         printf "\n#ifdef %s\n", compat > sysinc
  458                         printf "#define compat(n, name) n, (sy_call_t *)__CONCAT(o,name)\n" > sysinc
  459                         printf "#else\n" > sysinc
  460                         printf "#define compat(n, name) 0, (sy_call_t *)nosys\n" > sysinc
  461                         printf "#endif\n" > sysinc
  462                 }
  463 
  464                 if (ncompat4 != 0) {
  465                         printf "\n#ifdef %s\n", compat4 > sysinc
  466                         printf "#define compat4(n, name) n, (sy_call_t *)__CONCAT(freebsd4_,name)\n" > sysinc
  467                         printf "#else\n" > sysinc
  468                         printf "#define compat4(n, name) 0, (sy_call_t *)nosys\n" > sysinc
  469                         printf "#endif\n" > sysinc
  470                 }
  471 
  472                 printf("\n#endif /* %s */\n\n", compat) > syscompatdcl
  473 
  474                 printf("\n#endif /* %s */\n\n", compat4) > syscompat4dcl
  475 
  476                 printf("#undef PAD_\n") > sysprotoend
  477                 printf("#undef PADL_\n") > sysprotoend
  478                 printf("#undef PADR_\n") > sysprotoend
  479                 printf("\n#endif /* !%s */\n", sysproto_h) > sysprotoend
  480 
  481                 printf("\n") > sysmk
  482                 printf("};\n") > sysent
  483                 printf("};\n") > sysnames
  484                 printf("#define\t%sMAXSYSCALL\t%d\n", syscallprefix, syscall) \
  485                     > syshdr
  486         } '
  487 
  488 cat $sysinc $sysent >> $syssw
  489 cat $sysarg $sysdcl \
  490         $syscompat $syscompatdcl \
  491         $syscompat4 $syscompat4dcl \
  492         $sysprotoend > $sysproto
  493 

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