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NetBSD/sys/compat/mach/mach_exec.c

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/* $NetBSD: mach_exec.c,v 1.27 2003/02/05 23:58:09 manu Exp $ */
/*-
* Copyright (c) 2001-2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and Emmanuel Dreyfus.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mach_exec.c,v 1.27 2003/02/05 23:58:09 manu Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/exec.h>
#include <sys/queue.h>
#include <sys/exec_macho.h>
#include <sys/malloc.h>
#include <sys/syscall.h>
#include <uvm/uvm_extern.h>
#include <uvm/uvm_param.h>
#include <compat/mach/mach_types.h>
#include <compat/mach/mach_message.h>
#include <compat/mach/mach_port.h>
#include <compat/mach/mach_semaphore.h>
#include <compat/mach/mach_exec.h>
static int mach_cold = 1; /* Have we initialized COMPAT_MACH structures? */
static void mach_e_proc_exec(struct proc *, struct exec_package *);
static void mach_e_proc_fork(struct proc *, struct proc *);
static void mach_init(void);
extern char sigcode[], esigcode[];
extern struct sysent sysent[];
#ifdef SYSCALL_DEBUG
extern const char * const syscallnames[];
#endif
#ifndef __HAVE_SYSCALL_INTERN
void syscall(void);
#else
void mach_syscall_intern(struct proc *);
#endif
const struct emul emul_mach = {
"mach",
"/emul/mach",
#ifndef __HAVE_MINIMAL_EMUL
0,
0,
SYS_syscall,
SYS_NSYSENT,
#endif
sysent,
#ifdef SYSCALL_DEBUG
syscallnames,
#else
NULL,
#endif
sendsig,
trapsignal,
sigcode,
esigcode,
setregs,
mach_e_proc_exec,
mach_e_proc_fork,
mach_e_proc_exit,
#ifdef __HAVE_SYSCALL_INTERN
mach_syscall_intern,
#else
syscall,
#endif
NULL,
NULL,
};
/*
* Copy arguments onto the stack in the normal way, but add some
* extra information in case of dynamic binding.
* XXX This needs a cleanup: it is not used anymore by the Darwin
* emulation, and it probably contains Darwin specific bits.
*/
int
exec_mach_copyargs(p, pack, arginfo, stackp, argp)
struct proc *p;
struct exec_package *pack;
struct ps_strings *arginfo;
char **stackp;
void *argp;
{
struct exec_macho_emul_arg *emea;
struct exec_macho_object_header *macho_hdr;
size_t len;
size_t zero = 0;
int error;
*stackp = (char *)(((unsigned long)*stackp - 1) & ~0xfUL);
emea = (struct exec_macho_emul_arg *)pack->ep_emul_arg;
macho_hdr = (struct exec_macho_object_header *)emea->macho_hdr;
if ((error = copyout(&macho_hdr, *stackp, sizeof(macho_hdr))) != 0)
return error;
*stackp += sizeof(macho_hdr);
if ((error = copyargs(p, pack, arginfo, stackp, argp)) != 0) {
DPRINTF(("mach: copyargs failed\n"));
return error;
}
if ((error = copyout(&zero, *stackp, sizeof(zero))) != 0)
return error;
*stackp += sizeof(zero);
if ((error = copyoutstr(emea->filename,
*stackp, MAXPATHLEN, &len)) != 0) {
DPRINTF(("mach: copyout path failed\n"));
return error;
}
*stackp += len + 1;
/* We don't need this anymore */
free(pack->ep_emul_arg, M_EXEC);
pack->ep_emul_arg = NULL;
len = len % sizeof(zero);
if (len) {
if ((error = copyout(&zero, *stackp, len)) != 0)
return error;
*stackp += len;
}
if ((error = copyout(&zero, *stackp, sizeof(zero))) != 0)
return error;
*stackp += sizeof(zero);
return 0;
}
int
exec_mach_probe(path)
char **path;
{
*path = (char *)emul_mach.e_path;
return 0;
}
static void
mach_e_proc_exec(p, epp)
struct proc *p;
struct exec_package *epp;
{
mach_e_proc_init(p, p->p_vmspace);
return;
}
static void
mach_e_proc_fork(p, parent)
struct proc *p;
struct proc *parent;
{
struct mach_emuldata *med1;
struct mach_emuldata *med2;
p->p_emuldata = NULL;
/* Use parent's vmspace because our vmspace may not be setup yet */
mach_e_proc_init(p, parent->p_vmspace);
med1 = p->p_emuldata;
med2 = parent->p_emuldata;
/* Nothing is inherited across forks in struct mach_emuldata */
return;
}
void
mach_e_proc_init(p, vmspace)
struct proc *p;
struct vmspace *vmspace;
{
struct mach_emuldata *med;
/*
* Initialize various things if needed.
* XXX Not the best place for that.
*/
if (mach_cold == 1)
mach_init();
if (!p->p_emuldata)
p->p_emuldata = malloc(sizeof(struct mach_emuldata),
M_EMULDATA, M_WAITOK | M_ZERO);
med = (struct mach_emuldata *)p->p_emuldata;
LIST_INIT(&med->med_right);
lockinit(&med->med_rightlock, PZERO|PCATCH, "mach_right", 0, 0);
/*
* For debugging purpose, it's convenient to have each process
* using distinct port names, so we prefix the first port name
* by the PID. Darwin does not do that, but we can remove it
* when we want, it will not hurt.
*/
med->med_nextright = p->p_pid << 16;
med->med_kernel = mach_port_get();
med->med_host = mach_port_get();
med->med_exception = mach_port_get();
med->med_kernel->mp_flags |= MACH_MP_INKERNEL;
med->med_host->mp_flags |= MACH_MP_INKERNEL;
med->med_exception->mp_flags |= MACH_MP_INKERNEL;
/* Make sure they will not be deallocated */
med->med_kernel->mp_refcount++;
med->med_host->mp_refcount++;
med->med_exception->mp_refcount++;
med->med_bootstrap = mach_bootstrap_port;
med->med_bootstrap->mp_refcount++;
med->med_dirty_thid = 1;
return;
}
void
mach_e_proc_exit(p)
struct proc *p;
{
struct mach_emuldata *med;
struct mach_right *mr;
mach_semaphore_cleanup(p);
med = (struct mach_emuldata *)p->p_emuldata;
lockmgr(&med->med_rightlock, LK_EXCLUSIVE, NULL);
while ((mr = LIST_FIRST(&med->med_right)) != NULL)
mach_right_put_exclocked(mr, MACH_PORT_TYPE_ALL_RIGHTS);
lockmgr(&med->med_rightlock, LK_RELEASE, NULL);
if (--med->med_bootstrap->mp_refcount == 0)
mach_port_put(med->med_bootstrap);
if (--med->med_kernel->mp_refcount == 0)
mach_port_put(med->med_kernel);
if (--med->med_host->mp_refcount == 0)
mach_port_put(med->med_host);
if (--med->med_exception->mp_refcount == 0)
mach_port_put(med->med_exception);
free(med, M_EMULDATA);
p->p_emuldata = NULL;
return;
}
static void
mach_init(void)
{
mach_semaphore_init();
mach_message_init();
mach_port_init();
mach_cold = 0;
return;
}
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