153ac44cf6
syscalls. On the dynamic syscall deregistration, wait until all threads leave the syscall code. This somewhat increases the safety of the loadable modules unloading. Reviewed by: jhb Tested by: pho MFC after: 1 month
593 lines
17 KiB
Bash
593 lines
17 KiB
Bash
#! /bin/sh -
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# @(#)makesyscalls.sh 8.1 (Berkeley) 6/10/93
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# $FreeBSD$
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set -e
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# name of compat options:
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compat=COMPAT_43
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compat4=COMPAT_FREEBSD4
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compat6=COMPAT_FREEBSD6
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compat7=COMPAT_FREEBSD7
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# output files:
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sysnames="syscalls.c"
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sysproto="../sys/sysproto.h"
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sysproto_h=_SYS_SYSPROTO_H_
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syshdr="../sys/syscall.h"
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sysmk="../sys/syscall.mk"
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syssw="init_sysent.c"
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syscallprefix="SYS_"
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switchname="sysent"
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namesname="syscallnames"
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systrace="systrace_args.c"
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# tmp files:
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sysaue="sysent.aue.$$"
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sysdcl="sysent.dcl.$$"
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syscompat="sysent.compat.$$"
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syscompatdcl="sysent.compatdcl.$$"
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syscompat4="sysent.compat4.$$"
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syscompat4dcl="sysent.compat4dcl.$$"
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syscompat6="sysent.compat6.$$"
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syscompat6dcl="sysent.compat6dcl.$$"
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syscompat7="sysent.compat7.$$"
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syscompat7dcl="sysent.compat7dcl.$$"
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sysent="sysent.switch.$$"
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sysinc="sysinc.switch.$$"
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sysarg="sysarg.switch.$$"
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sysprotoend="sysprotoend.$$"
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systracetmp="systrace.$$"
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trap "rm $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $syscompat7 $syscompat7dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp" 0
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touch $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $syscompat7 $syscompat7dcl $sysent $sysinc $sysarg $sysprotoend $systracetmp
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case $# in
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0) echo "usage: $0 input-file <config-file>" 1>&2
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exit 1
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;;
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esac
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if [ -n "$2" -a -f "$2" ]; then
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. $2
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fi
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sed -e '
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s/\$//g
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:join
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/\\$/{a\
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N
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s/\\\n//
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b join
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}
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2,${
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/^#/!s/\([{}()*,]\)/ \1 /g
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}
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' < $1 | awk "
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BEGIN {
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sysaue = \"$sysaue\"
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sysdcl = \"$sysdcl\"
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sysproto = \"$sysproto\"
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sysprotoend = \"$sysprotoend\"
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sysproto_h = \"$sysproto_h\"
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syscompat = \"$syscompat\"
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syscompatdcl = \"$syscompatdcl\"
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syscompat4 = \"$syscompat4\"
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syscompat4dcl = \"$syscompat4dcl\"
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syscompat6 = \"$syscompat6\"
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syscompat6dcl = \"$syscompat6dcl\"
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syscompat7 = \"$syscompat7\"
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syscompat7dcl = \"$syscompat7dcl\"
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sysent = \"$sysent\"
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syssw = \"$syssw\"
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sysinc = \"$sysinc\"
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sysarg = \"$sysarg\"
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sysnames = \"$sysnames\"
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syshdr = \"$syshdr\"
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sysmk = \"$sysmk\"
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systrace = \"$systrace\"
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systracetmp = \"$systracetmp\"
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compat = \"$compat\"
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compat4 = \"$compat4\"
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compat6 = \"$compat6\"
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compat7 = \"$compat7\"
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syscallprefix = \"$syscallprefix\"
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switchname = \"$switchname\"
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namesname = \"$namesname\"
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infile = \"$1\"
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"'
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printf "/*\n * System call switch table.\n *\n" > syssw
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > syssw
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printf " * $%s$\n", "FreeBSD" > syssw
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printf "/*\n * System call prototypes.\n *\n" > sysarg
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarg
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printf " * $%s$\n", "FreeBSD" > sysarg
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printf "\n#ifdef %s\n\n", compat > syscompat
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printf "\n#ifdef %s\n\n", compat4 > syscompat4
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printf "\n#ifdef %s\n\n", compat6 > syscompat6
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printf "\n#ifdef %s\n\n", compat7 > syscompat7
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printf "/*\n * System call names.\n *\n" > sysnames
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
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printf " * $%s$\n", "FreeBSD" > sysnames
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printf "/*\n * System call numbers.\n *\n" > syshdr
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
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printf " * $%s$\n", "FreeBSD" > syshdr
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printf "# FreeBSD system call names.\n" > sysmk
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printf "# DO NOT EDIT-- this file is automatically generated.\n" > sysmk
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printf "# $%s$\n", "FreeBSD" > sysmk
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printf "/*\n * System call argument to DTrace register array converstion.\n *\n" > systrace
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printf " * DO NOT EDIT-- this file is automatically generated.\n" > systrace
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printf " * $%s$\n", "FreeBSD" > systrace
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}
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NR == 1 {
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gsub("[$]FreeBSD: ", "", $0)
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gsub(" [$]", "", $0)
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printf " * created from%s\n */\n\n", $0 > syssw
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printf "\n/* The casts are bogus but will do for now. */\n" > sysent
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printf "struct sysent %s[] = {\n",switchname > sysent
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printf " * created from%s\n */\n\n", $0 > sysarg
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printf "#ifndef %s\n", sysproto_h > sysarg
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printf "#define\t%s\n\n", sysproto_h > sysarg
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printf "#include <sys/signal.h>\n" > sysarg
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printf "#include <sys/acl.h>\n" > sysarg
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printf "#include <sys/cpuset.h>\n" > sysarg
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printf "#include <sys/_semaphore.h>\n" > sysarg
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printf "#include <sys/ucontext.h>\n\n" > sysarg
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printf "#include <bsm/audit_kevents.h>\n\n" > sysarg
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printf "struct proc;\n\n" > sysarg
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printf "struct thread;\n\n" > sysarg
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printf "#define\tPAD_(t)\t(sizeof(register_t) <= sizeof(t) ? \\\n" > sysarg
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printf "\t\t0 : sizeof(register_t) - sizeof(t))\n\n" > sysarg
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printf "#if BYTE_ORDER == LITTLE_ENDIAN\n"> sysarg
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printf "#define\tPADL_(t)\t0\n" > sysarg
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printf "#define\tPADR_(t)\tPAD_(t)\n" > sysarg
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printf "#else\n" > sysarg
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printf "#define\tPADL_(t)\tPAD_(t)\n" > sysarg
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printf "#define\tPADR_(t)\t0\n" > sysarg
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printf "#endif\n\n" > sysarg
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printf " * created from%s\n */\n\n", $0 > sysnames
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printf "const char *%s[] = {\n", namesname > sysnames
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printf " * created from%s\n */\n\n", $0 > syshdr
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printf "# created from%s\nMIASM = ", $0 > sysmk
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printf " * This file is part of the DTrace syscall provider.\n */\n\n" > systrace
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printf "static void\nsystrace_args(int sysnum, void *params, uint64_t *uarg, int *n_args)\n{\n" > systrace
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printf "\tint64_t *iarg = (int64_t *) uarg;\n" > systrace
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printf "\tswitch (sysnum) {\n" > systrace
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printf "static void\nsystrace_setargdesc(int sysnum, int ndx, char *desc, size_t descsz)\n{\n\tconst char *p = NULL;\n" > systracetmp
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printf "\tswitch (sysnum) {\n" > systracetmp
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next
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}
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NF == 0 || $1 ~ /^;/ {
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next
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}
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$1 ~ /^#[ ]*include/ {
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print > sysinc
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next
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}
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$1 ~ /^#[ ]*if/ {
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print > sysent
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print > sysdcl
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print > sysarg
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print > syscompat
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print > syscompat4
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print > syscompat6
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print > syscompat7
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print > sysnames
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savesyscall = syscall
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next
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}
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$1 ~ /^#[ ]*else/ {
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print > sysent
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print > sysdcl
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print > sysarg
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print > syscompat
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print > syscompat4
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print > syscompat6
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print > syscompat7
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print > sysnames
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syscall = savesyscall
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next
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}
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$1 ~ /^#/ {
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print > sysent
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print > sysdcl
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print > sysarg
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print > syscompat
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print > syscompat4
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print > syscompat6
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print > syscompat7
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print > sysnames
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next
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}
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syscall != $1 {
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printf "%s: line %d: syscall number out of sync at %d\n",
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infile, NR, syscall
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printf "line is:\n"
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print
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exit 1
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}
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# Returns true if the type "name" is the first flag in the type field
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function type(name, flags, n) {
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n = split($3, flags, /\|/)
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return (n > 0 && flags[1] == name)
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}
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# Returns true if the flag "name" is set in the type field
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function flag(name, flags, i, n) {
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n = split($3, flags, /\|/)
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for (i = 1; i <= n; i++)
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if (flags[i] == name)
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return 1
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return 0
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}
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function align_sysent_comment(column) {
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printf("\t") > sysent
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column = column + 8 - column % 8
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while (column < 56) {
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printf("\t") > sysent
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column = column + 8
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}
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}
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function parserr(was, wanted) {
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printf "%s: line %d: unexpected %s (expected %s)\n",
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infile, NR, was, wanted
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exit 1
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}
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function parseline() {
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f=4 # toss number, type, audit event
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argc= 0;
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argssize = "0"
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thr_flag = "SY_THR_STATIC"
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if (flag("NOTSTATIC")) {
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thr_flag = "SY_THR_ABSENT"
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}
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if ($NF != "}") {
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funcalias=$(NF-2)
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argalias=$(NF-1)
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rettype=$NF
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end=NF-3
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} else {
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funcalias=""
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argalias=""
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rettype="int"
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end=NF
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}
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if (flag("NODEF")) {
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auditev="AUE_NULL"
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funcname=$4
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argssize = "AS(" $6 ")"
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return
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}
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if ($f != "{")
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parserr($f, "{")
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f++
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if ($end != "}")
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parserr($end, "}")
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end--
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if ($end != ";")
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parserr($end, ";")
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end--
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if ($end != ")")
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parserr($end, ")")
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end--
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f++ #function return type
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funcname=$f
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if (funcalias == "")
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funcalias = funcname
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if (argalias == "") {
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argalias = funcname "_args"
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if (flag("COMPAT"))
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argalias = "o" argalias
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if (flag("COMPAT4"))
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argalias = "freebsd4_" argalias
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if (flag("COMPAT6"))
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argalias = "freebsd6_" argalias
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if (flag("COMPAT7"))
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argalias = "freebsd7_" argalias
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}
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f++
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if ($f != "(")
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parserr($f, ")")
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f++
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if (f == end) {
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if ($f != "void")
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parserr($f, "argument definition")
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return
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}
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while (f <= end) {
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argc++
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argtype[argc]=""
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oldf=""
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while (f < end && $(f+1) != ",") {
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if (argtype[argc] != "" && oldf != "*")
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argtype[argc] = argtype[argc]" ";
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argtype[argc] = argtype[argc]$f;
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oldf = $f;
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f++
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}
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if (argtype[argc] == "")
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parserr($f, "argument definition")
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argname[argc]=$f;
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f += 2; # skip name, and any comma
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}
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if (argc != 0)
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argssize = "AS(" argalias ")"
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}
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{ comment = $4
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if (NF < 7)
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for (i = 5; i <= NF; i++)
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comment = comment " " $i
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}
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#
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# The AUE_ audit event identifier.
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#
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{
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auditev = $2;
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}
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#
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# The currently-empty flags field.
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#
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{
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flags = "0";
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}
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type("STD") || type("NODEF") || type("NOARGS") || type("NOPROTO") \
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|| type("NOSTD") {
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parseline()
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printf("\t/* %s */\n\tcase %d: {\n", funcname, syscall) > systrace
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printf("\t/* %s */\n\tcase %d:\n", funcname, syscall) > systracetmp
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if (argc > 0) {
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printf("\t\tswitch(ndx) {\n") > systracetmp
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printf("\t\tstruct %s *p = params;\n", argalias) > systrace
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for (i = 1; i <= argc; i++) {
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printf("\t\tcase %d:\n\t\t\tp = \"%s\";\n\t\t\tbreak;\n", i - 1, argtype[i]) > systracetmp
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if (index(argtype[i], "*") > 0 || argtype[i] == "caddr_t")
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printf("\t\tuarg[%d] = (intptr_t) p->%s; /* %s */\n", \
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i - 1, \
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argname[i], argtype[i]) > systrace
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else if (substr(argtype[i], 1, 1) == "u" || argtype[i] == "size_t")
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printf("\t\tuarg[%d] = p->%s; /* %s */\n", \
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i - 1, \
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argname[i], argtype[i]) > systrace
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else
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printf("\t\tiarg[%d] = p->%s; /* %s */\n", \
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i - 1, \
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argname[i], argtype[i]) > systrace
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}
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printf("\t\tdefault:\n\t\t\tbreak;\n\t\t};\n") > systracetmp
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}
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printf("\t\t*n_args = %d;\n\t\tbreak;\n\t}\n", argc) > systrace
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printf("\t\tbreak;\n") > systracetmp
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if (argc != 0 && !flag("NOARGS") && !flag("NOPROTO") && \
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!flag("NODEF")) {
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printf("struct %s {\n", argalias) > sysarg
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for (i = 1; i <= argc; i++)
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printf("\tchar %s_l_[PADL_(%s)]; " \
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"%s %s; char %s_r_[PADR_(%s)];\n",
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argname[i], argtype[i],
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argtype[i], argname[i],
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argname[i], argtype[i]) > sysarg
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printf("};\n") > sysarg
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}
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else if (!flag("NOARGS") && !flag("NOPROTO") && !flag("NODEF"))
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printf("struct %s {\n\tregister_t dummy;\n};\n",
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argalias) > sysarg
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if (!flag("NOPROTO") && !flag("NODEF")) {
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printf("%s\t%s(struct thread *, struct %s *)",
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rettype, funcname, argalias) > sysdcl
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printf(";\n") > sysdcl
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printf("#define\t%sAUE_%s\t%s\n", syscallprefix,
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funcalias, auditev) > sysaue
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}
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printf("\t{ %s, (sy_call_t *)", argssize) > sysent
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column = 8 + 2 + length(argssize) + 15
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if (flag("NOSTD")) {
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printf("%s },", "lkmressys, AUE_NULL, NULL, 0, 0, 0, SY_THR_ABSENT") > sysent
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column = column + length("lkmressys") + length("AUE_NULL") + 3
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} else {
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printf("%s, %s, NULL, 0, 0, %s, %s },", funcname, auditev, flags, thr_flag) > sysent
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column = column + length(funcname) + length(auditev) + length(flags) + 3
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}
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align_sysent_comment(column)
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printf("/* %d = %s */\n", syscall, funcalias) > sysent
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printf("\t\"%s\",\t\t\t/* %d = %s */\n",
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funcalias, syscall, funcalias) > sysnames
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if (!flag("NODEF")) {
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printf("#define\t%s%s\t%d\n", syscallprefix,
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funcalias, syscall) > syshdr
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printf(" \\\n\t%s.o", funcalias) > sysmk
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}
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syscall++
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next
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}
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type("COMPAT") || type("COMPAT4") || type("COMPAT6") || \
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type("COMPAT7") {
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if (flag("COMPAT")) {
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ncompat++
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out = syscompat
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outdcl = syscompatdcl
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wrap = "compat"
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prefix = "o"
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descr = "old"
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} else if (flag("COMPAT4")) {
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ncompat4++
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out = syscompat4
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outdcl = syscompat4dcl
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wrap = "compat4"
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prefix = "freebsd4_"
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descr = "freebsd4"
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} else if (flag("COMPAT6")) {
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ncompat6++
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out = syscompat6
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outdcl = syscompat6dcl
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wrap = "compat6"
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prefix = "freebsd6_"
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descr = "freebsd6"
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} else if (flag("COMPAT7")) {
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ncompat7++
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out = syscompat7
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outdcl = syscompat7dcl
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wrap = "compat7"
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prefix = "freebsd7_"
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descr = "freebsd7"
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}
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parseline()
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if (argc != 0 && !flag("NOARGS") && !flag("NOPROTO") && \
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!flag("NODEF")) {
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printf("struct %s {\n", argalias) > out
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for (i = 1; i <= argc; i++)
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printf("\tchar %s_l_[PADL_(%s)]; %s %s; " \
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"char %s_r_[PADR_(%s)];\n",
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argname[i], argtype[i],
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argtype[i], argname[i],
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argname[i], argtype[i]) > out
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printf("};\n") > out
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}
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else if (!flag("NOARGS") && !flag("NOPROTO") && !flag("NODEF"))
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printf("struct %s {\n\tregister_t dummy;\n};\n",
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argalias) > sysarg
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|
if (!flag("NOPROTO") && !flag("NODEF")) {
|
|
printf("%s\t%s%s(struct thread *, struct %s *);\n",
|
|
rettype, prefix, funcname, argalias) > outdcl
|
|
printf("#define\t%sAUE_%s%s\t%s\n", syscallprefix,
|
|
prefix, funcname, auditev) > sysaue
|
|
}
|
|
if (flag("NOSTD")) {
|
|
printf("\t{ %s, (sy_call_t *)%s, %s, NULL, 0, 0, 0, SY_THR_ABSENT },",
|
|
"0", "lkmressys", "AUE_NULL") > sysent
|
|
align_sysent_comment(8 + 2 + length("0") + 15 + \
|
|
length("lkmressys") + length("AUE_NULL") + 3)
|
|
} else {
|
|
printf("\t{ %s(%s,%s), %s, NULL, 0, 0, %s, %s },",
|
|
wrap, argssize, funcname, auditev, flags, thr_flag) > sysent
|
|
align_sysent_comment(8 + 9 + length(argssize) + 1 + \
|
|
length(funcname) + length(auditev) + \
|
|
length(flags) + 4)
|
|
}
|
|
printf("/* %d = %s %s */\n", syscall, descr, funcalias) > sysent
|
|
printf("\t\"%s.%s\",\t\t/* %d = %s %s */\n",
|
|
wrap, funcalias, syscall, descr, funcalias) > sysnames
|
|
if (flag("COMPAT")) {
|
|
printf("\t\t\t\t/* %d is old %s */\n",
|
|
syscall, funcalias) > syshdr
|
|
} else if (!flag("NODEF")) {
|
|
printf("#define\t%s%s%s\t%d\n", syscallprefix,
|
|
prefix, funcalias, syscall) > syshdr
|
|
printf(" \\\n\t%s%s.o", prefix, funcalias) > sysmk
|
|
}
|
|
syscall++
|
|
next
|
|
}
|
|
type("OBSOL") {
|
|
printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0, 0, SY_THR_ABSENT },") > sysent
|
|
align_sysent_comment(34)
|
|
printf("/* %d = obsolete %s */\n", syscall, comment) > sysent
|
|
printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n",
|
|
$4, syscall, comment) > sysnames
|
|
printf("\t\t\t\t/* %d is obsolete %s */\n",
|
|
syscall, comment) > syshdr
|
|
syscall++
|
|
next
|
|
}
|
|
type("UNIMPL") {
|
|
printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0, 0, SY_THR_ABSENT },\t\t\t/* %d = %s */\n",
|
|
syscall, comment) > sysent
|
|
printf("\t\"#%d\",\t\t\t/* %d = %s */\n",
|
|
syscall, syscall, comment) > sysnames
|
|
syscall++
|
|
next
|
|
}
|
|
{
|
|
printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $3
|
|
exit 1
|
|
}
|
|
END {
|
|
printf "\n#define AS(name) (sizeof(struct name) / sizeof(register_t))\n" > sysinc
|
|
|
|
if (ncompat != 0 || ncompat4 != 0 || ncompat6 != 0 || ncompat7 != 0)
|
|
printf "#include \"opt_compat.h\"\n\n" > syssw
|
|
|
|
if (ncompat != 0) {
|
|
printf "\n#ifdef %s\n", compat > sysinc
|
|
printf "#define compat(n, name) n, (sy_call_t *)__CONCAT(o,name)\n" > sysinc
|
|
printf "#else\n" > sysinc
|
|
printf "#define compat(n, name) 0, (sy_call_t *)nosys\n" > sysinc
|
|
printf "#endif\n" > sysinc
|
|
}
|
|
|
|
if (ncompat4 != 0) {
|
|
printf "\n#ifdef %s\n", compat4 > sysinc
|
|
printf "#define compat4(n, name) n, (sy_call_t *)__CONCAT(freebsd4_,name)\n" > sysinc
|
|
printf "#else\n" > sysinc
|
|
printf "#define compat4(n, name) 0, (sy_call_t *)nosys\n" > sysinc
|
|
printf "#endif\n" > sysinc
|
|
}
|
|
|
|
if (ncompat6 != 0) {
|
|
printf "\n#ifdef %s\n", compat6 > sysinc
|
|
printf "#define compat6(n, name) n, (sy_call_t *)__CONCAT(freebsd6_,name)\n" > sysinc
|
|
printf "#else\n" > sysinc
|
|
printf "#define compat6(n, name) 0, (sy_call_t *)nosys\n" > sysinc
|
|
printf "#endif\n" > sysinc
|
|
}
|
|
|
|
if (ncompat7 != 0) {
|
|
printf "\n#ifdef %s\n", compat7 > sysinc
|
|
printf "#define compat7(n, name) n, (sy_call_t *)__CONCAT(freebsd7_,name)\n" > sysinc
|
|
printf "#else\n" > sysinc
|
|
printf "#define compat7(n, name) 0, (sy_call_t *)nosys\n" > sysinc
|
|
printf "#endif\n" > sysinc
|
|
}
|
|
|
|
printf("\n#endif /* %s */\n\n", compat) > syscompatdcl
|
|
printf("\n#endif /* %s */\n\n", compat4) > syscompat4dcl
|
|
printf("\n#endif /* %s */\n\n", compat6) > syscompat6dcl
|
|
printf("\n#endif /* %s */\n\n", compat7) > syscompat7dcl
|
|
|
|
printf("\n#undef PAD_\n") > sysprotoend
|
|
printf("#undef PADL_\n") > sysprotoend
|
|
printf("#undef PADR_\n") > sysprotoend
|
|
printf("\n#endif /* !%s */\n", sysproto_h) > sysprotoend
|
|
|
|
printf("\n") > sysmk
|
|
printf("};\n") > sysent
|
|
printf("};\n") > sysnames
|
|
printf("#define\t%sMAXSYSCALL\t%d\n", syscallprefix, syscall) \
|
|
> syshdr
|
|
printf "\tdefault:\n\t\t*n_args = 0;\n\t\tbreak;\n\t};\n}\n" > systrace
|
|
printf "\tdefault:\n\t\tbreak;\n\t};\n\tif (p != NULL)\n\t\tstrlcpy(desc, p, descsz);\n}\n" > systracetmp
|
|
} '
|
|
|
|
cat $sysinc $sysent >> $syssw
|
|
cat $sysarg $sysdcl \
|
|
$syscompat $syscompatdcl \
|
|
$syscompat4 $syscompat4dcl \
|
|
$syscompat6 $syscompat6dcl \
|
|
$syscompat7 $syscompat7dcl \
|
|
$sysaue $sysprotoend > $sysproto
|
|
cat $systracetmp >> $systrace
|
|
|