NetBSD-5.0.2/sys/compat/irix/irix_mman.c
/* $NetBSD: irix_mman.c,v 1.22 2008/04/28 20:23:41 martin Exp $ */
/*-
* Copyright (c) 2002, 2008 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.
*
* 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: irix_mman.c,v 1.22 2008/04/28 20:23:41 martin Exp $");
#if defined(_KERNEL_OPT)
#include "opt_sysv.h"
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <sys/signal.h>
#include <sys/proc.h>
#include <sys/exec.h>
#include <sys/filedesc.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/vnode_if.h>
#include <sys/mount.h>
#include <sys/rwlock.h>
#include <sys/systm.h>
#include <sys/syscallargs.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_lwp.h>
#include <compat/svr4/svr4_ucontext.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_syscallargs.h>
#include <compat/irix/irix_types.h>
#include <compat/irix/irix_signal.h>
#include <compat/irix/irix_mman.h>
#include <compat/irix/irix_prctl.h>
#include <compat/irix/irix_exec.h>
#include <compat/irix/irix_syscallargs.h>
static int irix_mmap(struct lwp *, void *, size_t, int ,
int, int, off_t, register_t *);
int
irix_sys_mmap(struct lwp *l, const struct irix_sys_mmap_args *uap, register_t *retval)
{
/* {
syscallarg(void *) addr;
syscallarg(irix_size_t) len;
syscallarg(int) prot;
syscallarg(int) flags;
syscallarg(int) fd;
syscallarg(irix_off_t) pos;
} */
return irix_mmap(l, SCARG(uap, addr), SCARG(uap, len),
SCARG(uap, prot), SCARG(uap, flags), SCARG(uap, fd),
SCARG(uap, pos), retval);
}
int
irix_sys_mmap64(struct lwp *l, const struct irix_sys_mmap64_args *uap, register_t *retval)
{
/* {
syscallarg(void *) addr;
syscallarg(irix_size_t) len;
syscallarg(int) prot;
syscallarg(int) flags;
syscallarg(int) fd;
syscallarg(int) pad1;
syscallarg(irix_off64_t) pos;
} */
return irix_mmap(l, SCARG(uap, addr), SCARG(uap, len),
SCARG(uap, prot), SCARG(uap, flags), SCARG(uap, fd),
SCARG(uap, pos), retval);
}
static int
irix_mmap(struct lwp *l, void *addr, size_t len, int prot, int flags, int fd, off_t pos, register_t *retval)
{
struct proc *p = l->l_proc;
struct sys_mmap_args cup;
int bsd_flags = 0;
int error = 0;
#ifdef DEBUG_IRIX
printf("irix_sys_mmap(): addr = %p, len = 0x%x, prot = 0x%x ",
addr, len, prot);
printf("flags = 0x%x, fd = %d, pos = 0x%lx\n", flags, fd, (long)pos);
#endif
if (flags & IRIX_MAP_SHARED)
bsd_flags |= MAP_SHARED;
if (flags & IRIX_MAP_PRIVATE)
bsd_flags |= MAP_PRIVATE;
if (flags & IRIX_MAP_COPY)
bsd_flags |= MAP_PRIVATE;
/*
* Note about MAP_FIXED: IRIX's mmap(2) states that
* when MAP_FIXED is unset, range 0x30000000 to 0x40000000
* will not be used except if MAP_SGI_ANYADDR is set
* or if syssgi(SGI_UNSUPPORTED_MAP_RESERVED_RANGE) was
* enabled. We do not emulate this behavior for now.
*/
if (flags & IRIX_MAP_FIXED)
bsd_flags |= MAP_FIXED;
if (flags & IRIX_MAP_RENAME)
bsd_flags |= MAP_RENAME;
if (flags & IRIX_MAP_AUTORESRV)
printf("Warning: unsupported IRIX mmap() flag MAP_AUTORESV\n");
if (flags & IRIX_MAP_TEXT)
printf("Warning: unsupported IRIX mmap() flag MAP_TEXT\n");
if (flags & IRIX_MAP_BRK)
printf("Warning: unsupported IRIX mmap() flag MAP_BRK\n");
if (flags & IRIX_MAP_PRIMARY)
printf("Warning: unsupported IRIX mmap() flag MAP_PRIMARY\n");
if (flags & IRIX_MAP_SGI_ANYADDR)
printf("Warning: unsupported IRIX mmap() flag IRIX_MAP_SGI_ANYADDR\n");
/*
* When AUTOGROW is set and the mapping is bigger than
* the file, if pages beyond the end of file are touched,
* IRIX will increase the file size accordingly. We are
* not able to emulate this (yet), hence we immediatly
* grow the file to fit the mapping, before mapping it.
*/
if (flags & IRIX_MAP_AUTOGROW) {
file_t *fp;
struct vnode *vp;
struct vattr vattr;
if ((error = fd_getvnode(fd, &fp)) != 0)
return error;
if ((fp->f_flag & FWRITE) == 0) {
error = EINVAL;
goto out;
}
vp = fp->f_data;
if (vp->v_type == VFIFO) {
error = ESPIPE;
goto out;
}
if (vp->v_type == VDIR) {
error = EISDIR;
goto out;
}
if ((error = VOP_GETATTR(vp, &vattr, l->l_cred)) != 0)
goto out;
if (pos + len > vattr.va_size) {
VATTR_NULL(&vattr);
vattr.va_size = round_page(pos + len);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_SETATTR(vp, &vattr, l->l_cred);
VOP_UNLOCK(vp, 0);
}
out:
fd_putfile(fd);
if (error)
return error;
}
SCARG(&cup, addr) = addr;
SCARG(&cup, len) = len;
SCARG(&cup, prot) = prot;
SCARG(&cup, flags) = bsd_flags;
SCARG(&cup, fd) = fd;
SCARG(&cup, pos) = pos;
/* A private mapping that should not be visible to the share group */
if (flags & IRIX_MAP_LOCAL) {
if ((error = sys_mmap(l, &cup, retval)) != 0)
return error;
addr = (void *)*retval;
irix_isrr_insert((vaddr_t)addr, len, IRIX_ISRR_PRIVATE, p);
return 0;
}
IRIX_VM_SYNC(p, error = sys_mmap(l, &cup, retval));
return error;
}
int
irix_sys_munmap(struct lwp *l, const struct irix_sys_munmap_args *uap, register_t *retval)
{
/* {
syscallarg(void *) addr;
syscallarg(size_t) len;
} */
struct proc *p = l->l_proc;
int error;
IRIX_VM_SYNC(p, error = sys_munmap(l, (const void *)uap, retval));
if (error == 0)
irix_isrr_insert((vaddr_t)SCARG(uap, addr),
SCARG(uap, len), IRIX_ISRR_SHARED, p);
return error;
}
int
irix_sys_break(struct lwp *l, const struct irix_sys_break_args *uap, register_t *retval)
{
struct proc *p = l->l_proc;
int error;
IRIX_VM_SYNC(p, error = svr4_sys_break(l, (const void *)uap, retval));
return error;
}
#ifdef SYSVSHM
int
irix_sys_shmsys(struct lwp *l, const struct irix_sys_shmsys_args *uap, register_t *retval)
{
struct proc *p = l->l_proc;
int error;
IRIX_VM_SYNC(p, error = svr4_sys_shmsys(l, (const void *)uap, retval));
return error;
}
#endif
int
irix_sys_mprotect(struct lwp *l, const struct irix_sys_mprotect_args *uap, register_t *retval)
{
struct proc *p = l->l_proc;
int error;
IRIX_VM_SYNC(p, error = sys_mprotect(l, (const void *)uap, retval));
return error;
}