NetBSD-5.0.2/usr.bin/kdump/setemul.c
/* $NetBSD: setemul.c,v 1.26 2008/04/28 20:24:13 martin 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.
*
* 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. 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
__RCSID("$NetBSD: setemul.c,v 1.26 2008/04/28 20:24:13 martin Exp $");
#endif /* not lint */
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/queue.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/ibcs2/ibcs2_syscall.h"
#include "../../sys/compat/irix/irix_syscall.h"
#include "../../sys/compat/linux/linux_syscall.h"
#include "../../sys/compat/linux32/linux32_syscall.h"
#include "../../sys/compat/mach/mach_syscall.h"
#include "../../sys/compat/darwin/darwin_syscall.h"
#include "../../sys/compat/mach/arch/powerpc/ppccalls/mach_ppccalls_syscall.h"
#include "../../sys/compat/mach/arch/powerpc/fasttraps/mach_fasttraps_syscall.h"
#include "../../sys/compat/osf1/osf1_syscall.h"
#include "../../sys/compat/sunos32/sunos32_syscall.h"
#include "../../sys/compat/sunos/sunos_syscall.h"
#include "../../sys/compat/svr4/svr4_syscall.h"
#include "../../sys/compat/svr4_32/svr4_32_syscall.h"
#include "../../sys/compat/ultrix/ultrix_syscall.h"
#ifdef __m68k__
#include "../../sys/compat/aoutm68k/aoutm68k_syscall.h"
#endif
#define KTRACE
#include "../../sys/kern/syscalls.c"
#include "../../sys/compat/netbsd32/netbsd32_syscalls.c"
#include "../../sys/compat/freebsd/freebsd_syscalls.c"
#include "../../sys/compat/ibcs2/ibcs2_syscalls.c"
#include "../../sys/compat/irix/irix_syscalls.c"
#include "../../sys/compat/linux/linux_syscalls.c"
#include "../../sys/compat/linux32/linux32_syscalls.c"
#include "../../sys/compat/darwin/darwin_syscalls.c"
#include "../../sys/compat/mach/mach_syscalls.c"
#include "../../sys/compat/mach/arch/powerpc/ppccalls/mach_ppccalls_syscalls.c"
#include "../../sys/compat/mach/arch/powerpc/fasttraps/mach_fasttraps_syscalls.c"
#include "../../sys/compat/osf1/osf1_syscalls.c"
#include "../../sys/compat/sunos/sunos_syscalls.c"
#include "../../sys/compat/sunos32/sunos32_syscalls.c"
#include "../../sys/compat/svr4/svr4_syscalls.c"
#include "../../sys/compat/svr4_32/svr4_32_syscalls.c"
#include "../../sys/compat/ultrix/ultrix_syscalls.c"
#ifdef __m68k__
#include "../../sys/compat/aoutm68k/aoutm68k_syscalls.c"
#endif
#include "../../sys/compat/svr4/svr4_errno.c"
#include "../../sys/compat/ibcs2/ibcs2_errno.c"
#include "../../sys/compat/irix/irix_errno.c"
#include "../../sys/compat/osf1/osf1_errno.c"
#include "../../sys/compat/linux/common/linux_errno.c"
#undef KTRACE
#define SIGRTMIN 33 /* XXX */
#include "../../sys/compat/svr4/svr4_signo.c"
#include "../../sys/compat/ibcs2/ibcs2_signo.c"
/* irix uses svr4 */
#include "../../sys/compat/osf1/osf1_signo.c"
#include "../../sys/compat/linux/common/linux_signo.c"
/* For Mach services names in MMSG traces */
#ifndef LETS_GET_SMALL
#include "../../sys/compat/mach/mach_services_names.c"
#endif
#define NELEM(a) (sizeof(a) / sizeof(a[0]))
/* static */
const struct emulation emulations[] = {
{ "netbsd", syscallnames, SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, EMUL_FLAG_NETBSD32 },
{ "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL,
native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno),
ibcs2_to_native_signo, NSIG, 0 },
{ "irix o32", irix_syscallnames, IRIX_SYS_MAXSYSCALL,
native_to_irix_errno, NELEM(native_to_irix_errno),
svr4_to_native_signo, NSIG, 0 },
{ "irix n32", irix_syscallnames, IRIX_SYS_MAXSYSCALL,
native_to_irix_errno, NELEM(native_to_irix_errno),
svr4_to_native_signo, NSIG, 0 },
{ "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL,
native_to_linux_errno, NELEM(native_to_linux_errno),
linux_to_native_signo, NSIG, 0 },
{ "linux32", linux32_syscallnames, LINUX32_SYS_MAXSYSCALL,
native_to_linux_errno, NELEM(native_to_linux_errno),
linux_to_native_signo, NSIG, EMUL_FLAG_NETBSD32 },
{ "darwin", darwin_syscallnames, DARWIN_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "mach", mach_syscallnames, MACH_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "mach ppccalls", mach_ppccalls_syscallnames,
MACH_PPCCALLS_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "mach fasttraps", mach_fasttraps_syscallnames,
MACH_FASTTRAPS_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL,
native_to_osf1_errno, NELEM(native_to_osf1_errno),
osf1_to_native_signo, NSIG, 0 },
{ "sunos32", sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, EMUL_FLAG_NETBSD32 },
{ "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL,
native_to_svr4_errno, NELEM(native_to_svr4_errno),
svr4_to_native_signo, NSIG, 0 },
{ "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL,
native_to_svr4_errno, NELEM(native_to_svr4_errno),
svr4_to_native_signo, NSIG, EMUL_FLAG_NETBSD32 },
{ "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
{ "pecoff", syscallnames, SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
#ifdef __m68k__
{ "aoutm68k", aoutm68k_syscallnames, AOUTM68K_SYS_MAXSYSCALL,
NULL, 0,
NULL, 0, 0 },
#endif
{ NULL, NULL, 0,
NULL, 0,
NULL, 0, 0 }
};
struct emulation_ctx {
pid_t pid;
const struct emulation *emulation;
LIST_ENTRY(emulation_ctx) ctx_link;
};
const struct emulation *cur_emul;
const struct emulation *prev_emul;
/* Mach emulation require extra emulation contexts */
static const struct emulation *mach;
static const struct emulation *mach_ppccalls;
static const struct emulation *mach_fasttraps;
static const struct emulation *default_emul = &emulations[0];
struct emulation_ctx *current_ctx;
static LIST_HEAD(, emulation_ctx) emul_ctx =
LIST_HEAD_INITIALIZER(emul_ctx);
static struct emulation_ctx *ectx_find(pid_t);
static void ectx_update(pid_t, const struct emulation *);
void
setemul(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);
else
default_emul = match;
if (cur_emul != NULL)
prev_emul = cur_emul;
else
prev_emul = match;
cur_emul = 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.
* MMMmmmm not when I use it, it is only bounded PID_MAX!
* Requeue looked up item at start of list to cache result since the
* trace file tendes to have a burst of calls for a single process.
*/
/*
* Find an emulation context appropriate for the given pid.
*/
static struct emulation_ctx *
ectx_find(pid_t pid)
{
struct emulation_ctx *ctx;
/* Find an existing entry */
LIST_FOREACH(ctx, &emul_ctx, ctx_link) {
if (ctx->pid == pid)
break;
}
if (ctx == NULL) {
/* create entry with default emulation */
ctx = malloc(sizeof *ctx);
if (ctx == NULL)
err(1, "malloc emul context");
ctx->pid = pid;
ctx->emulation = default_emul;
/* chain into the list */
LIST_INSERT_HEAD(&emul_ctx, ctx, ctx_link);
} else {
/* move entry to head to optimize lookup for syscall bursts */
LIST_REMOVE(ctx, ctx_link);
LIST_INSERT_HEAD(&emul_ctx, ctx, ctx_link);
}
return ctx;
}
/*
* Update emulation context for given pid, or create new if no context
* for this pid exists.
*/
static void
ectx_update(pid_t pid, const struct emulation *emul)
{
struct emulation_ctx *ctx;
ctx = ectx_find(pid);
ctx->emulation = emul;
}
/*
* Ensure current emulation context is correct for given pid.
*/
void
ectx_sanify(pid_t pid)
{
struct emulation_ctx *ctx;
ctx = ectx_find(pid);
cur_emul = ctx->emulation;
}
/*
* Delete emulation context for current pid.
* (eg when tracing exit())
* Defer delete just in case we've cached a pointer...
*/
void
ectx_delete(void)
{
static struct emulation_ctx *ctx = NULL;
if (ctx != NULL)
free(ctx);
/*
* The emulation for current syscall entry is always on HEAD, due
* to code in ectx_find().
*/
ctx = LIST_FIRST(&emul_ctx);
if (ctx)
LIST_REMOVE(ctx, ctx_link);
}
/*
* Temporarily modify code and emulations to handle Mach traps
* XXX The define are duplicated from sys/arch/powerpc/include/mach_syscall.c
*/
#define MACH_FASTTRAPS 0x00007ff0
#define MACH_PPCCALLS 0x00006000
#define MACH_ODD_SYSCALL_MASK 0x0000fff0
int
mach_traps_dispatch(int *code, const struct emulation **emul)
{
switch (*code & MACH_ODD_SYSCALL_MASK) {
case MACH_FASTTRAPS:
*emul = mach_fasttraps;
*code -= MACH_FASTTRAPS;
return 1;
case MACH_PPCCALLS:
*emul = mach_ppccalls;
*code -= MACH_PPCCALLS;
return 1;
default:
if (*code < 0 && *code > -MACH_SYS_MAXSYSCALL) {
*emul = mach;
*code = -*code;
return 1;
}
return 0;
}
}
/*
* Lookup Machs emulations
*/
void
mach_lookup_emul(void)
{
const struct emulation *emul_idx;
for (emul_idx = emulations; emul_idx->name; emul_idx++) {
if (strcmp("mach", emul_idx->name) == 0)
mach = emul_idx;
if (strcmp("mach fasttraps", emul_idx->name) == 0)
mach_fasttraps = emul_idx;
if (strcmp("mach ppccalls", emul_idx->name) == 0)
mach_ppccalls = emul_idx;
}
if (mach == NULL || mach_fasttraps == NULL || mach_ppccalls == NULL) {
errx(1, "Cannot load mach emulations");
exit(1);
}
return;
}
/*
* Find the name of the Mach service responsible to a given message Id
*/
const char *
mach_service_name(id)
int id;
{
const char *retval = NULL;
#ifndef LETS_GET_SMALL
struct mach_service_name *srv;
for (srv = mach_services_names; srv->srv_id; srv++)
if (srv->srv_id == id)
break;
retval = srv->srv_name;
#endif /* LETS_GET_SMALL */
return retval;
}