285 lines
9.7 KiB
C
285 lines
9.7 KiB
C
/* $NetBSD: setemul.c,v 1.11 2002/01/07 23:45:10 manu Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: setemul.c,v 1.11 2002/01/07 23:45:10 manu Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "setemul.h"
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#include <sys/syscall.h>
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#include "../../sys/compat/netbsd32/netbsd32_syscall.h"
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#include "../../sys/compat/freebsd/freebsd_syscall.h"
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#include "../../sys/compat/hpux/hpux_syscall.h"
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#include "../../sys/compat/ibcs2/ibcs2_syscall.h"
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#include "../../sys/compat/irix/irix_syscall.h"
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#include "../../sys/compat/linux/linux_syscall.h"
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#include "../../sys/compat/osf1/osf1_syscall.h"
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#include "../../sys/compat/sunos32/sunos32_syscall.h"
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#include "../../sys/compat/sunos/sunos_syscall.h"
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#include "../../sys/compat/svr4/svr4_syscall.h"
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#include "../../sys/compat/svr4_32/svr4_32_syscall.h"
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#include "../../sys/compat/ultrix/ultrix_syscall.h"
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#define KTRACE
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#include "../../sys/kern/syscalls.c"
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#include "../../sys/compat/netbsd32/netbsd32_syscalls.c"
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#include "../../sys/compat/freebsd/freebsd_syscalls.c"
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#include "../../sys/compat/hpux/hpux_syscalls.c"
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#include "../../sys/compat/ibcs2/ibcs2_syscalls.c"
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#include "../../sys/compat/irix/irix_syscalls.c"
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#include "../../sys/compat/linux/linux_syscalls.c"
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#include "../../sys/compat/osf1/osf1_syscalls.c"
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#include "../../sys/compat/sunos/sunos_syscalls.c"
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#include "../../sys/compat/sunos32/sunos32_syscalls.c"
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#include "../../sys/compat/svr4/svr4_syscalls.c"
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#include "../../sys/compat/svr4_32/svr4_32_syscalls.c"
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#include "../../sys/compat/ultrix/ultrix_syscalls.c"
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#include "../../sys/compat/hpux/hpux_errno.c"
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#include "../../sys/compat/svr4/svr4_errno.c"
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#include "../../sys/compat/ibcs2/ibcs2_errno.c"
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#include "../../sys/compat/irix/irix_errno.c"
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#include "../../sys/compat/linux/common/linux_errno.c"
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#undef KTRACE
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#define NELEM(a) (sizeof(a) / sizeof(a[0]))
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static const struct emulation emulations[] = {
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{ "netbsd", syscallnames, SYS_MAXSYSCALL,
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NULL, 0 },
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{ "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL,
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NULL, 0 },
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{ "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL,
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NULL, 0 },
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{ "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL,
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native_to_hpux_errno, NELEM(native_to_hpux_errno) },
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{ "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL,
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native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno) },
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{ "irix o32", irix_syscallnames, IRIX_SYS_MAXSYSCALL,
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native_to_irix_errno, NELEM(native_to_irix_errno) },
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{ "irix n32", irix_syscallnames, IRIX_SYS_MAXSYSCALL,
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native_to_irix_errno, NELEM(native_to_irix_errno) },
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{ "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL,
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native_to_linux_errno, NELEM(native_to_linux_errno) },
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{ "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL,
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NULL, 0 },
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{ "sunos32",sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL,
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NULL, 0 },
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{ "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL,
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NULL, 0 },
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{ "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL,
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native_to_svr4_errno, NELEM(native_to_svr4_errno) },
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{ "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL,
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native_to_svr4_errno, NELEM(native_to_svr4_errno) },
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{ "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL,
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NULL, 0 },
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{ "pecoff", syscallnames, SYS_MAXSYSCALL,
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NULL, 0 },
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{ NULL, NULL, 0,
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NULL, 0 }
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};
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struct emulation_ctx {
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pid_t pid;
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const struct emulation *emulation;
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struct emulation_ctx *next;
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};
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const struct emulation *current;
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const struct emulation *previous;
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static const struct emulation *default_emul=NULL;
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struct emulation_ctx *current_ctx;
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struct emulation_ctx *emul_ctx = NULL;
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static struct emulation_ctx *ectx_find __P((pid_t));
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static void ectx_update __P((pid_t, const struct emulation *));
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void
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setemul(name, pid, update_ectx)
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const char *name;
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pid_t pid;
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int update_ectx;
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{
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int i;
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const struct emulation *match = NULL;
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for (i = 0; emulations[i].name != NULL; i++) {
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if (strcmp(emulations[i].name, name) == 0) {
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match = &emulations[i];
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break;
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}
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}
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if (!match) {
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warnx("Emulation `%s' unknown", name);
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return;
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}
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if (update_ectx)
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ectx_update(pid, match);
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if (!default_emul)
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default_emul = match;
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if (current != NULL)
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previous = current;
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else
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previous = match;
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current = match;
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}
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/*
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* Emulation context list is very simple chained list, not even hashed.
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* We expect the number of separate traced contexts/processes to be
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* fairly low, so it's not worth it to optimize this.
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*/
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/*
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* Find an emulation context appropriate for the given pid.
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*/
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static struct emulation_ctx *
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ectx_find(pid)
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pid_t pid;
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{
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struct emulation_ctx *ctx;
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for(ctx = emul_ctx; ctx != NULL; ctx = ctx->next) {
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if (ctx->pid == pid)
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return ctx;
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}
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return NULL;
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}
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/*
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* Update emulation context for given pid, or create new if no context
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* for this pid exists.
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*/
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static void
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ectx_update(pid, emul)
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pid_t pid;
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const struct emulation *emul;
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{
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struct emulation_ctx *ctx;
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if ((ctx = ectx_find(pid)) != NULL) {
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/* found and entry, ensure the emulation is right (exec!) */
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ctx->emulation = emul;
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return;
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}
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ctx = (struct emulation_ctx *)malloc(sizeof(struct emulation_ctx));
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ctx->pid = pid;
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ctx->emulation = emul;
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/* put the entry on start of emul_ctx chain */
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ctx->next = emul_ctx;
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emul_ctx = ctx;
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}
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/*
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* Ensure current emulation context is correct for given pid.
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*/
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void
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ectx_sanify(pid)
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pid_t pid;
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{
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struct emulation_ctx *ctx;
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if ((ctx = ectx_find(pid)) != NULL)
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current = ctx->emulation;
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else if (default_emul)
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current = default_emul;
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else
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current = &emulations[0]; /* NetBSD */
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}
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