316 lines
8.4 KiB
C
316 lines
8.4 KiB
C
/* $NetBSD: irix_prctl.c,v 1.9 2002/05/02 17:17:29 manu Exp $ */
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/*-
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* Copyright (c) 2001-2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: irix_prctl.c,v 1.9 2002/05/02 17:17:29 manu Exp $");
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#include <sys/errno.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/signal.h>
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#include <sys/systm.h>
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#include <sys/exec.h>
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#include <sys/resourcevar.h>
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#include <uvm/uvm_extern.h>
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#include <machine/regnum.h>
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#include <machine/vmparam.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/irix/irix_types.h>
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#include <compat/irix/irix_prctl.h>
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#include <compat/irix/irix_signal.h>
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#include <compat/irix/irix_syscallargs.h>
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struct irix_sproc_child_args {
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struct proc **isc_proc;
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void *isc_entry;
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void *isc_arg;
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void *isc_aux;
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};
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static void irix_sproc_child __P((struct irix_sproc_child_args *));
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static int irix_sproc __P((void *, unsigned int, void *, caddr_t, size_t,
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pid_t, struct proc *, register_t *));
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int
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irix_sys_prctl(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct irix_sys_prctl_args /* {
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syscallarg(int) option;
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syscallarg(void *) arg1;
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} */ *uap = v;
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int option = SCARG(uap, option);
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#ifdef DEBUG_IRIX
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printf("irix_sys_prctl(): option = %d\n", option);
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#endif
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switch(option) {
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case IRIX_PR_GETSHMASK: { /* Get shared resources */
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struct proc *p2;
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int shmask = 0;
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p2 = pfind((pid_t)SCARG(uap, arg1));
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if (p2 == p || SCARG(uap, arg1) == 0) {
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/* XXX return our own shmask */
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return 0;
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}
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if (p2 == NULL)
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return EINVAL;
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if (p->p_vmspace == p2->p_vmspace)
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shmask |= IRIX_PR_SADDR;
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if (p->p_fd == p2->p_fd)
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shmask |= IRIX_PR_SFDS;
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if (p->p_cwdi == p2->p_cwdi);
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shmask |= IRIX_PR_SDIR;
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*retval = (register_t)shmask;
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return 0;
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break;
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}
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case IRIX_PR_LASTSHEXIT: /* "Last sproc exit" */
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/* We do nothing */
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break;
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case IRIX_PR_GETNSHARE: /* Number of sproc share group memb.*/
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/* XXX This only gives threads that share VM space ... */
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*retval = p->p_vmspace->vm_refcnt;
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break;
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case IRIX_PR_TERMCHILD: /* Send SIGHUP to parrent on exit */
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p->p_exitsig = SIGHUP;
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*retval = 0;
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break;
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default:
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printf("Warning: call to unimplemented prctl() command %d\n",
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option);
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return EINVAL;
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break;
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}
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return 0;
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}
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int
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irix_sys_pidsprocsp(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct irix_sys_pidsprocsp_args /* {
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syscallarg(void *) entry;
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syscallarg(unsigned) inh;
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syscallarg(void *) arg;
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syscallarg(caddr_t) sp;
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syscallarg(irix_size_t) len;
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syscallarg(irix_pid_t) pid;
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} */ *uap = v;
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/* pid is ignored for now */
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printf("Warning: unsupported pid argument to IRIX sproc\n");
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return irix_sproc(SCARG(uap, entry), SCARG(uap, inh), SCARG(uap, arg),
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SCARG(uap, sp), SCARG(uap, len), SCARG(uap, pid), p, retval);
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}
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int
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irix_sys_sprocsp(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct irix_sys_sprocsp_args /* {
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syscallarg(void *) entry;
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syscallarg(unsigned) inh;
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syscallarg(void *) arg;
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syscallarg(caddr_t) sp;
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syscallarg(irix_size_t) len;
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} */ *uap = v;
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return irix_sproc(SCARG(uap, entry), SCARG(uap, inh), SCARG(uap, arg),
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SCARG(uap, sp), SCARG(uap, len), 0, p, retval);
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}
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int
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irix_sys_sproc(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct irix_sys_sproc_args /* {
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syscallarg(void *) entry;
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syscallarg(unsigned) inh;
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syscallarg(void *) arg;
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} */ *uap = v;
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return irix_sproc(SCARG(uap, entry), SCARG(uap, inh), SCARG(uap, arg),
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NULL, 0, 0, p, retval);
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}
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static int irix_sproc(entry, inh, arg, sp, len, pid, p, retval)
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void *entry;
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unsigned int inh;
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void *arg;
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caddr_t sp;
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size_t len;
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pid_t pid;
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struct proc *p;
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register_t *retval;
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{
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int bsd_flags = 0;
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struct exec_vmcmd vmc;
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struct frame *tf = (struct frame *)p->p_md.md_regs;
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int error;
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struct proc *p2;
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struct irix_sproc_child_args isc;
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#ifdef DEBUG_IRIX
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printf("irix_sproc(): entry = %p, inh = %d, arg = %p, sp = 0x%08lx, len = 0x%08lx, pid = %d\n", entry, inh, arg, (u_long)sp, (u_long)len, pid);
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#endif
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if (inh & IRIX_PR_SADDR)
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bsd_flags |= FORK_SHAREVM;
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if (inh & IRIX_PR_SFDS)
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bsd_flags |= FORK_SHAREFILES;
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if (inh & IRIX_PR_SDIR)
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bsd_flags |= FORK_SHARECWD;
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if (inh & IRIX_PR_SUMASK)
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printf("Warning: unimplemented IRIX sproc flag PR_SUMASK\n");
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if (inh & IRIX_PR_SULIMIT)
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printf("Warning: unimplemented IRIX sproc flag PR_SULIMIT\n");
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if (inh & IRIX_PR_SID)
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printf("Warning: unimplemented IRIX sproc flag PR_SID\n");
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/*
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* Setting up child stack
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*/
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if (inh & IRIX_PR_SADDR) {
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if (len == 0)
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len = p->p_rlimit[RLIMIT_STACK].rlim_cur;
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if (sp == NULL)
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sp = (caddr_t)(round_page(tf->f_regs[SP])
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- IRIX_SPROC_STACK_OFFSET - len);
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while (trunc_page((u_long)sp) >=
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(u_long)p->p_vmspace->vm_maxsaddr)
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sp -= IRIX_SPROC_STACK_OFFSET;
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bzero(&vmc, sizeof(vmc));
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vmc.ev_addr = trunc_page((u_long)sp);
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vmc.ev_len = round_page(len);
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vmc.ev_prot = UVM_PROT_RWX;
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vmc.ev_flags = UVM_FLAG_COPYONW|UVM_FLAG_FIXED|UVM_FLAG_OVERLAY;
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vmc.ev_proc = vmcmd_map_zero;
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#ifdef DEBUG_IRIX
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printf("irix_sproc(): new stack addr=0x%08lx, len=0x%08lx\n",
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(u_long)sp, (u_long)len);
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#endif
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if ((error = (*vmc.ev_proc)(p, &vmc)) != 0)
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return error;
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p->p_vmspace->vm_maxsaddr = (void *)trunc_page((u_long)sp);
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}
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/*
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* Arguments for irix_sproc_child()
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*/
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isc.isc_proc = &p2;
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isc.isc_entry = entry;
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isc.isc_arg = arg;
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if ((error = copyin((void *)(tf->f_regs[SP] + 28),
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&isc.isc_aux, sizeof(isc.isc_aux))) != 0)
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isc.isc_aux = 0;
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if ((error = fork1(p, bsd_flags, SIGCHLD, (void *)sp, len,
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(void *)irix_sproc_child, (void *)&isc, retval, &p2)) != 0)
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return error;
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/*
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* Some local variables are referenced in irix_sproc_child()
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* through isc. We need to ensure the child does not use them
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* anymore before leaving.
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*/
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(void)ltsleep((void *)&isc, 0, "sproc", 0, NULL);
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retval[0] = (register_t)p2->p_pid;
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retval[1] = 0;
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return 0;
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}
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static void
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irix_sproc_child(isc)
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struct irix_sproc_child_args *isc;
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{
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struct proc *p2 = *isc->isc_proc;
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struct frame *tf = (struct frame *)p2->p_md.md_regs;
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/*
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* Setup PC to return to the child entry point
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*/
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tf->f_regs[PC] = (unsigned long)isc->isc_entry;
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/*
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* Setup child arguments
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* The libc stub will copy S3 to A1 once we return to userland.
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*/
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tf->f_regs[A0] = (unsigned long)isc->isc_arg;
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tf->f_regs[A1] = (unsigned long)isc->isc_aux;
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tf->f_regs[S3] = (unsigned long)isc->isc_aux;
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/*
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* We do not need isc anymore, we can wakeup our parent
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*/
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wakeup((void *)isc);
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/*
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* Return to userland for a newly created process
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*/
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child_return((void *)p2);
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return;
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}
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