NetBSD/sys/compat/darwin/darwin_exec.c

453 lines
12 KiB
C

/* $NetBSD: darwin_exec.c,v 1.44 2005/12/11 12:19:56 christos Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by 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 "opt_compat_darwin.h" /* For COMPAT_DARWIN in mach_port.h */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: darwin_exec.c,v 1.44 2005/12/11 12:19:56 christos Exp $");
#include "opt_syscall_debug.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/exec.h>
#include <sys/malloc.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>
#include <sys/conf.h>
#include <sys/exec_macho.h>
#include <uvm/uvm_extern.h>
#include <uvm/uvm_param.h>
#include <dev/wscons/wsconsio.h>
#include <compat/sys/signal.h>
#include <compat/common/compat_util.h>
#include <compat/mach/mach_types.h>
#include <compat/mach/mach_message.h>
#include <compat/mach/mach_exec.h>
#include <compat/mach/mach_port.h>
#include <compat/darwin/darwin_exec.h>
#include <compat/darwin/darwin_commpage.h>
#include <compat/darwin/darwin_signal.h>
#include <compat/darwin/darwin_syscall.h>
#include <compat/darwin/darwin_sysctl.h>
#include <compat/darwin/darwin_iokit.h>
#include <compat/darwin/darwin_iohidsystem.h>
#include <machine/darwin_machdep.h>
/* Redefined from sys/dev/wscons/wsdisplay.c */
extern const struct cdevsw wsdisplay_cdevsw;
static void darwin_e_proc_exec(struct proc *, struct exec_package *);
static void darwin_e_proc_fork(struct proc *, struct proc *, int);
static void darwin_e_proc_exit(struct proc *);
static void darwin_e_proc_init(struct proc *, struct vmspace *);
extern struct sysent darwin_sysent[];
#ifdef SYSCALL_DEBUG
extern const char * const darwin_syscallnames[];
#endif
#ifndef __HAVE_SYSCALL_INTERN
void syscall(void);
#else
void mach_syscall_intern(struct proc *);
#endif
const struct emul emul_darwin = {
"darwin",
"/emul/darwin",
#ifndef __HAVE_MINIMAL_EMUL
0,
0,
DARWIN_SYS_syscall,
DARWIN_SYS_NSYSENT,
#endif
darwin_sysent,
#ifdef SYSCALL_DEBUG
darwin_syscallnames,
#else
NULL,
#endif
darwin_sendsig,
darwin_trapsignal,
darwin_tracesig,
NULL,
NULL,
NULL,
setregs,
darwin_e_proc_exec,
darwin_e_proc_fork,
darwin_e_proc_exit,
mach_e_lwp_fork,
mach_e_lwp_exit,
#ifdef __HAVE_SYSCALL_INTERN
mach_syscall_intern,
#else
syscall,
#endif
NULL,
NULL,
uvm_default_mapaddr,
};
/*
* Copy arguments onto the stack in the normal way, but add some
* extra information in case of dynamic binding.
*/
int
exec_darwin_copyargs(l, pack, arginfo, stackp, argp)
struct lwp *l;
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;
struct proc *p = l->l_proc;
char **cpp, *dp, *sp, *progname;
size_t len;
void *nullp = NULL;
long argc, envc;
int error;
/*
* Prepare the comm pages
*/
if ((error = darwin_commpage_map(p)) != 0)
return error;
/*
* Set up the stack
*/
*stackp = (char *)(((unsigned long)*stackp - 1) & ~0xfUL);
emea = (struct exec_macho_emul_arg *)pack->ep_emul_arg;
if (emea->dynamic == 1) {
macho_hdr = (struct exec_macho_object_header *)emea->macho_hdr;
error = copyout(&macho_hdr, *stackp, sizeof(macho_hdr));
if (error != 0)
return error;
*stackp += sizeof(macho_hdr);
}
cpp = (char **)*stackp;
argc = arginfo->ps_nargvstr;
envc = arginfo->ps_nenvstr;
if ((error = copyout(&argc, cpp++, sizeof(argc))) != 0)
return error;
dp = (char *) (cpp + argc + envc + 4);
if ((error = copyoutstr(emea->filename, dp,
(ARG_MAX < MAXPATHLEN) ? ARG_MAX : MAXPATHLEN, &len)) != 0)
return error;
progname = dp;
dp += len;
sp = argp;
arginfo->ps_argvstr = cpp; /* remember location of argv for later */
for (; --argc >= 0; sp += len, dp += len)
if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
return error;
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
return error;
arginfo->ps_envstr = cpp; /* remember location of envp for later */
for (; --envc >= 0; sp += len, dp += len)
if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
return error;
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
return error;
if ((error = copyout(&progname, cpp++, sizeof(progname))) != 0)
return error;
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
return error;
*stackp = (char *)cpp;
/* We don't need this anymore */
free(pack->ep_emul_arg, M_EXEC);
pack->ep_emul_arg = NULL;
return 0;
}
int
exec_darwin_probe(path)
const char **path;
{
*path = emul_darwin.e_path;
return 0;
}
static void
darwin_e_proc_exec(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct darwin_emuldata *ded;
darwin_e_proc_init(p, p->p_vmspace);
/* Setup the mach_emuldata part of darwin_emuldata */
mach_e_proc_exec(p, epp);
ded = (struct darwin_emuldata *)p->p_emuldata;
if (p->p_pid == darwin_init_pid)
ded->ded_fakepid = 1;
#ifdef DEBUG_DARWIN
printf("pid %d exec'd: fakepid = %d\n", p->p_pid, ded->ded_fakepid);
#endif
return;
}
static void
darwin_e_proc_fork(p, parent, forkflags)
struct proc *p;
struct proc *parent;
int forkflags;
{
struct darwin_emuldata *ded1;
struct darwin_emuldata *ded2;
char *ed1, *ed2;
size_t len;
p->p_emuldata = NULL;
/* Use parent's vmspace because our vmspace may not be setup yet */
darwin_e_proc_init(p, parent->p_vmspace);
/*
* Setup the mach_emuldata part of darwin_emuldata
* The null third argument asks to not re-allocate
* p->p_emuldata again.
*/
mach_e_proc_fork1(p, parent, 0);
ded1 = p->p_emuldata;
ded2 = parent->p_emuldata;
ed1 = (char *)ded1 + sizeof(struct mach_emuldata);;
ed2 = (char *)ded2 + sizeof(struct mach_emuldata);;
len = sizeof(struct darwin_emuldata) - sizeof(struct mach_emuldata);
(void)memcpy(ed1, ed2, len);
if ((ded2->ded_fakepid == 1) && (darwin_init_pid != 0)) {
darwin_init_pid = 0;
ded1->ded_fakepid = 2;
} else {
ded1->ded_fakepid = 0;
}
#ifdef DEBUG_DARWIN
printf("pid %d fork'd: fakepid = %d\n", p->p_pid, ded1->ded_fakepid);
#endif
return;
}
static void
darwin_e_proc_init(p, vmspace)
struct proc *p;
struct vmspace *vmspace;
{
struct darwin_emuldata *ded;
if (!p->p_emuldata) {
p->p_emuldata = malloc(sizeof(struct darwin_emuldata),
M_EMULDATA, M_WAITOK | M_ZERO);
}
ded = (struct darwin_emuldata *)p->p_emuldata;
ded->ded_fakepid = 0;
ded->ded_wsdev = NODEV;
ded->ded_vramoffset = NULL;
/* Initalize the mach_emuldata part of darwin_emuldata */
mach_e_proc_init(p, vmspace);
return;
}
static void
darwin_e_proc_exit(p)
struct proc *p;
{
struct darwin_emuldata *ded;
int error, mode;
struct wsdisplay_cmap cmap;
u_char *red;
u_char *green;
u_char *blue;
u_char kred[256];
u_char kgreen[256];
u_char kblue[256];
struct lwp *l;
caddr_t sg = stackgap_init(p, 0);
ded = p->p_emuldata;
l = proc_representative_lwp(p);
/*
* mach_init is setting the bootstrap port for other processes.
* If mach_init dies, we want to restore the original bootstrap
* port.
*/
if (ded->ded_fakepid == 2)
mach_bootstrap_port = mach_saved_bootstrap_port;
/*
* Terminate the iohidsystem kernel thread.
* We need to post a fake event in case
* the thread is sleeping for an event.
*/
if (ded->ded_hidsystem_finished != NULL) {
*ded->ded_hidsystem_finished = 1;
darwin_iohidsystem_postfake(l);
wakeup(ded->ded_hidsystem_finished);
}
/*
* Restore text mode and black and white colormap
*/
if (ded->ded_wsdev != NODEV) {
mode = WSDISPLAYIO_MODE_EMUL;
error = (*wsdisplay_cdevsw.d_ioctl)(ded->ded_wsdev,
WSDISPLAYIO_SMODE, (caddr_t)&mode, 0, l);
#ifdef DEBUG_DARWIN
if (error != 0)
printf("Unable to switch back to text mode\n");
#endif
red = stackgap_alloc(p, &sg, 256);
green = stackgap_alloc(p, &sg, 256);
blue = stackgap_alloc(p, &sg, 256);
(void)memset(kred, 255, 256);
(void)memset(kgreen, 255, 256);
(void)memset(kblue, 255, 256);
kred[0] = 0;
kgreen[0] = 0;
kblue[0] = 0;
cmap.index = 0;
cmap.count = 256;
cmap.red = red;
cmap.green = green;
cmap.blue = blue;
if (((error = copyout(kred, red, 256)) != 0) ||
((error = copyout(kgreen, green, 256)) != 0) ||
((error = copyout(kblue, blue, 256)) != 0))
error = (*wsdisplay_cdevsw.d_ioctl)(ded->ded_wsdev,
WSDISPLAYIO_PUTCMAP, (caddr_t)&cmap, 0, l);
#ifdef DEBUG_DARWIN
if (error != 0)
printf("Cannot revert colormap (error %d)\n", error);
#endif
}
/*
* Cleanup mach_emuldata part of darwin_emuldata
* It will also free p->p_emuldata.
*/
mach_e_proc_exit(p);
return;
}
int
darwin_exec_setup_stack(l, epp)
struct lwp *l;
struct exec_package *epp;
{
u_long max_stack_size;
u_long access_linear_min, access_size;
u_long noaccess_linear_min, noaccess_size;
if (epp->ep_flags & EXEC_32) {
epp->ep_minsaddr = DARWIN_USRSTACK32;
max_stack_size = MAXSSIZ;
} else {
epp->ep_minsaddr = DARWIN_USRSTACK;
max_stack_size = MAXSSIZ;
}
epp->ep_maxsaddr = (u_long)STACK_GROW(epp->ep_minsaddr,
max_stack_size);
epp->ep_ssize = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur;
/*
* set up commands for stack. note that this takes *two*, one to
* map the part of the stack which we can access, and one to map
* the part which we can't.
*
* arguably, it could be made into one, but that would require the
* addition of another mapping proc, which is unnecessary
*/
access_size = epp->ep_ssize;
access_linear_min = (u_long)STACK_ALLOC(epp->ep_minsaddr, access_size);
noaccess_size = max_stack_size - access_size;
noaccess_linear_min = (u_long)STACK_ALLOC(STACK_GROW(epp->ep_minsaddr,
access_size), noaccess_size);
if (noaccess_size > 0) {
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, noaccess_size,
noaccess_linear_min, NULL, 0, VM_PROT_NONE);
}
KASSERT(access_size > 0);
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, access_size,
access_linear_min, NULL, 0, VM_PROT_READ | VM_PROT_WRITE);
return 0;
}