NetBSD/usr.bin/kdump/setemul.c

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