67bf686897
problem with the 'shell scripts' was found, but there was a 'strange' problem found with a 486 laptop that we could not find. This commit backs the code back to 25-jul, and will be re-entered after the snapshot in smaller (more easily tested) chunks.
988 lines
22 KiB
C
988 lines
22 KiB
C
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* 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 University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*
|
|
* from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
|
|
*
|
|
* @(#)vm_mmap.c 8.4 (Berkeley) 1/12/94
|
|
* $Id: vm_mmap.c,v 1.48 1996/07/28 02:54:09 davidg Exp $
|
|
*/
|
|
|
|
/*
|
|
* Mapped file (mmap) interface to VM
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/file.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/vmmeter.h>
|
|
|
|
#include <miscfs/specfs/specdev.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/vm_prot.h>
|
|
#include <vm/vm_inherit.h>
|
|
#include <vm/lock.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_pager.h>
|
|
#include <vm/vm_pageout.h>
|
|
#include <vm/vm_extern.h>
|
|
#include <vm/vm_kern.h>
|
|
#include <vm/vm_page.h>
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sbrk_args {
|
|
int incr;
|
|
};
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sbrk(p, uap, retval)
|
|
struct proc *p;
|
|
struct sbrk_args *uap;
|
|
int *retval;
|
|
{
|
|
|
|
/* Not yet implemented */
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sstk_args {
|
|
int incr;
|
|
};
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sstk(p, uap, retval)
|
|
struct proc *p;
|
|
struct sstk_args *uap;
|
|
int *retval;
|
|
{
|
|
|
|
/* Not yet implemented */
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getpagesize_args {
|
|
int dummy;
|
|
};
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
ogetpagesize(p, uap, retval)
|
|
struct proc *p;
|
|
struct getpagesize_args *uap;
|
|
int *retval;
|
|
{
|
|
|
|
*retval = PAGE_SIZE;
|
|
return (0);
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mmap_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
int prot;
|
|
int flags;
|
|
int fd;
|
|
long pad;
|
|
off_t pos;
|
|
};
|
|
#endif
|
|
|
|
int
|
|
mmap(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mmap_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
struct vnode *vp;
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
vm_prot_t prot, maxprot;
|
|
caddr_t handle;
|
|
int flags, error;
|
|
|
|
prot = uap->prot & VM_PROT_ALL;
|
|
flags = uap->flags;
|
|
/*
|
|
* Address (if FIXED) must be page aligned. Size is implicitly rounded
|
|
* to a page boundary.
|
|
*/
|
|
addr = (vm_offset_t) uap->addr;
|
|
if (((flags & MAP_FIXED) && (addr & PAGE_MASK)) ||
|
|
(ssize_t) uap->len < 0 || ((flags & MAP_ANON) && uap->fd != -1))
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Round page if not already disallowed by above test
|
|
* XXX: Is there any point in the MAP_FIXED align requirement above?
|
|
*/
|
|
size = uap->len;
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
|
|
/*
|
|
* Check for illegal addresses. Watch out for address wrap... Note
|
|
* that VM_*_ADDRESS are not constants due to casts (argh).
|
|
*/
|
|
if (flags & MAP_FIXED) {
|
|
if (VM_MAXUSER_ADDRESS > 0 && addr + size > VM_MAXUSER_ADDRESS)
|
|
return (EINVAL);
|
|
#ifndef i386
|
|
if (VM_MIN_ADDRESS > 0 && addr < VM_MIN_ADDRESS)
|
|
return (EINVAL);
|
|
#endif
|
|
if (addr + size < addr)
|
|
return (EINVAL);
|
|
}
|
|
/*
|
|
* XXX if no hint provided for a non-fixed mapping place it after the
|
|
* end of the largest possible heap.
|
|
*
|
|
* There should really be a pmap call to determine a reasonable location.
|
|
*/
|
|
if (addr == 0 && (flags & MAP_FIXED) == 0)
|
|
addr = round_page(p->p_vmspace->vm_daddr + MAXDSIZ);
|
|
if (flags & MAP_ANON) {
|
|
/*
|
|
* Mapping blank space is trivial.
|
|
*/
|
|
handle = NULL;
|
|
maxprot = VM_PROT_ALL;
|
|
} else {
|
|
/*
|
|
* Mapping file, get fp for validation. Obtain vnode and make
|
|
* sure it is of appropriate type.
|
|
*/
|
|
if (((unsigned) uap->fd) >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[uap->fd]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE)
|
|
return (EINVAL);
|
|
vp = (struct vnode *) fp->f_data;
|
|
if (vp->v_type != VREG && vp->v_type != VCHR)
|
|
return (EINVAL);
|
|
/*
|
|
* XXX hack to handle use of /dev/zero to map anon memory (ala
|
|
* SunOS).
|
|
*/
|
|
if (vp->v_type == VCHR && iszerodev(vp->v_rdev)) {
|
|
handle = NULL;
|
|
maxprot = VM_PROT_ALL;
|
|
flags |= MAP_ANON;
|
|
} else {
|
|
/*
|
|
* Ensure that file and memory protections are
|
|
* compatible. Note that we only worry about
|
|
* writability if mapping is shared; in this case,
|
|
* current and max prot are dictated by the open file.
|
|
* XXX use the vnode instead? Problem is: what
|
|
* credentials do we use for determination? What if
|
|
* proc does a setuid?
|
|
*/
|
|
maxprot = VM_PROT_EXECUTE; /* ??? */
|
|
if (fp->f_flag & FREAD)
|
|
maxprot |= VM_PROT_READ;
|
|
else if (prot & PROT_READ)
|
|
return (EACCES);
|
|
if (flags & MAP_SHARED) {
|
|
if (fp->f_flag & FWRITE)
|
|
maxprot |= VM_PROT_WRITE;
|
|
else if (prot & PROT_WRITE)
|
|
return (EACCES);
|
|
} else
|
|
maxprot |= VM_PROT_WRITE;
|
|
handle = (caddr_t) vp;
|
|
}
|
|
}
|
|
error = vm_mmap(&p->p_vmspace->vm_map, &addr, size, prot, maxprot,
|
|
flags, handle, uap->pos);
|
|
if (error == 0)
|
|
*retval = (int) addr;
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ommap_args {
|
|
caddr_t addr;
|
|
int len;
|
|
int prot;
|
|
int flags;
|
|
int fd;
|
|
long pos;
|
|
};
|
|
#endif
|
|
int
|
|
ommap(p, uap, retval)
|
|
struct proc *p;
|
|
register struct ommap_args *uap;
|
|
int *retval;
|
|
{
|
|
struct mmap_args nargs;
|
|
static const char cvtbsdprot[8] = {
|
|
0,
|
|
PROT_EXEC,
|
|
PROT_WRITE,
|
|
PROT_EXEC | PROT_WRITE,
|
|
PROT_READ,
|
|
PROT_EXEC | PROT_READ,
|
|
PROT_WRITE | PROT_READ,
|
|
PROT_EXEC | PROT_WRITE | PROT_READ,
|
|
};
|
|
|
|
#define OMAP_ANON 0x0002
|
|
#define OMAP_COPY 0x0020
|
|
#define OMAP_SHARED 0x0010
|
|
#define OMAP_FIXED 0x0100
|
|
#define OMAP_INHERIT 0x0800
|
|
|
|
nargs.addr = uap->addr;
|
|
nargs.len = uap->len;
|
|
nargs.prot = cvtbsdprot[uap->prot & 0x7];
|
|
nargs.flags = 0;
|
|
if (uap->flags & OMAP_ANON)
|
|
nargs.flags |= MAP_ANON;
|
|
if (uap->flags & OMAP_COPY)
|
|
nargs.flags |= MAP_COPY;
|
|
if (uap->flags & OMAP_SHARED)
|
|
nargs.flags |= MAP_SHARED;
|
|
else
|
|
nargs.flags |= MAP_PRIVATE;
|
|
if (uap->flags & OMAP_FIXED)
|
|
nargs.flags |= MAP_FIXED;
|
|
if (uap->flags & OMAP_INHERIT)
|
|
nargs.flags |= MAP_INHERIT;
|
|
nargs.fd = uap->fd;
|
|
nargs.pos = uap->pos;
|
|
return (mmap(p, &nargs, retval));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct msync_args {
|
|
caddr_t addr;
|
|
int len;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
msync(p, uap, retval)
|
|
struct proc *p;
|
|
struct msync_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
int flags;
|
|
vm_map_t map;
|
|
int rv;
|
|
|
|
addr = (vm_offset_t) uap->addr;
|
|
size = uap->len;
|
|
flags = uap->flags;
|
|
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
if (addr + size < addr)
|
|
return(EINVAL);
|
|
|
|
if ((flags & (MS_ASYNC|MS_INVALIDATE)) == (MS_ASYNC|MS_INVALIDATE))
|
|
return (EINVAL);
|
|
|
|
map = &p->p_vmspace->vm_map;
|
|
|
|
/*
|
|
* XXX Gak! If size is zero we are supposed to sync "all modified
|
|
* pages with the region containing addr". Unfortunately, we don't
|
|
* really keep track of individual mmaps so we approximate by flushing
|
|
* the range of the map entry containing addr. This can be incorrect
|
|
* if the region splits or is coalesced with a neighbor.
|
|
*/
|
|
if (size == 0) {
|
|
vm_map_entry_t entry;
|
|
|
|
vm_map_lock_read(map);
|
|
rv = vm_map_lookup_entry(map, addr, &entry);
|
|
vm_map_unlock_read(map);
|
|
if (rv == FALSE)
|
|
return (EINVAL);
|
|
addr = entry->start;
|
|
size = entry->end - entry->start;
|
|
}
|
|
|
|
/*
|
|
* Clean the pages and interpret the return value.
|
|
*/
|
|
rv = vm_map_clean(map, addr, addr + size, (flags & MS_ASYNC) == 0,
|
|
(flags & MS_INVALIDATE) != 0);
|
|
|
|
switch (rv) {
|
|
case KERN_SUCCESS:
|
|
break;
|
|
case KERN_INVALID_ADDRESS:
|
|
return (EINVAL); /* Sun returns ENOMEM? */
|
|
case KERN_FAILURE:
|
|
return (EIO);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct munmap_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
};
|
|
#endif
|
|
int
|
|
munmap(p, uap, retval)
|
|
register struct proc *p;
|
|
register struct munmap_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
vm_map_t map;
|
|
|
|
addr = (vm_offset_t) uap->addr;
|
|
size = uap->len;
|
|
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
if (addr + size < addr)
|
|
return(EINVAL);
|
|
|
|
if (size == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* Check for illegal addresses. Watch out for address wrap... Note
|
|
* that VM_*_ADDRESS are not constants due to casts (argh).
|
|
*/
|
|
if (VM_MAXUSER_ADDRESS > 0 && addr + size > VM_MAXUSER_ADDRESS)
|
|
return (EINVAL);
|
|
#ifndef i386
|
|
if (VM_MIN_ADDRESS > 0 && addr < VM_MIN_ADDRESS)
|
|
return (EINVAL);
|
|
#endif
|
|
if (addr + size < addr)
|
|
return (EINVAL);
|
|
map = &p->p_vmspace->vm_map;
|
|
/*
|
|
* Make sure entire range is allocated.
|
|
*/
|
|
if (!vm_map_check_protection(map, addr, addr + size, VM_PROT_NONE))
|
|
return (EINVAL);
|
|
/* returns nothing but KERN_SUCCESS anyway */
|
|
(void) vm_map_remove(map, addr, addr + size);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
munmapfd(p, fd)
|
|
struct proc *p;
|
|
int fd;
|
|
{
|
|
/*
|
|
* XXX should unmap any regions mapped to this file
|
|
*/
|
|
p->p_fd->fd_ofileflags[fd] &= ~UF_MAPPED;
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mprotect_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
int prot;
|
|
};
|
|
#endif
|
|
int
|
|
mprotect(p, uap, retval)
|
|
struct proc *p;
|
|
struct mprotect_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
register vm_prot_t prot;
|
|
|
|
addr = (vm_offset_t) uap->addr;
|
|
size = uap->len;
|
|
prot = uap->prot & VM_PROT_ALL;
|
|
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
if (addr + size < addr)
|
|
return(EINVAL);
|
|
|
|
switch (vm_map_protect(&p->p_vmspace->vm_map, addr, addr + size, prot,
|
|
FALSE)) {
|
|
case KERN_SUCCESS:
|
|
return (0);
|
|
case KERN_PROTECTION_FAILURE:
|
|
return (EACCES);
|
|
}
|
|
return (EINVAL);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct minherit_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
int inherit;
|
|
};
|
|
#endif
|
|
int
|
|
minherit(p, uap, retval)
|
|
struct proc *p;
|
|
struct minherit_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
register vm_inherit_t inherit;
|
|
|
|
addr = (vm_offset_t)uap->addr;
|
|
size = uap->len;
|
|
inherit = uap->inherit;
|
|
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
if (addr + size < addr)
|
|
return(EINVAL);
|
|
|
|
switch (vm_map_inherit(&p->p_vmspace->vm_map, addr, addr+size,
|
|
inherit)) {
|
|
case KERN_SUCCESS:
|
|
return (0);
|
|
case KERN_PROTECTION_FAILURE:
|
|
return (EACCES);
|
|
}
|
|
return (EINVAL);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct madvise_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
int behav;
|
|
};
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
madvise(p, uap, retval)
|
|
struct proc *p;
|
|
struct madvise_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_map_t map;
|
|
pmap_t pmap;
|
|
vm_offset_t start, end;
|
|
/*
|
|
* Check for illegal addresses. Watch out for address wrap... Note
|
|
* that VM_*_ADDRESS are not constants due to casts (argh).
|
|
*/
|
|
if (VM_MAXUSER_ADDRESS > 0 &&
|
|
((vm_offset_t) uap->addr + uap->len) > VM_MAXUSER_ADDRESS)
|
|
return (EINVAL);
|
|
#ifndef i386
|
|
if (VM_MIN_ADDRESS > 0 && uap->addr < VM_MIN_ADDRESS)
|
|
return (EINVAL);
|
|
#endif
|
|
if (((vm_offset_t) uap->addr + uap->len) < (vm_offset_t) uap->addr)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Since this routine is only advisory, we default to conservative
|
|
* behavior.
|
|
*/
|
|
start = round_page((vm_offset_t) uap->addr);
|
|
end = trunc_page((vm_offset_t) uap->addr + uap->len);
|
|
|
|
map = &p->p_vmspace->vm_map;
|
|
pmap = &p->p_vmspace->vm_pmap;
|
|
|
|
vm_map_madvise(map, pmap, start, end, uap->behav);
|
|
|
|
/* Not yet implemented */
|
|
return (0);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mincore_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
char *vec;
|
|
};
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
mincore(p, uap, retval)
|
|
struct proc *p;
|
|
struct mincore_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr, first_addr;
|
|
vm_offset_t end, cend;
|
|
pmap_t pmap;
|
|
vm_map_t map;
|
|
char *vec;
|
|
int error;
|
|
int vecindex, lastvecindex;
|
|
register vm_map_entry_t current;
|
|
vm_map_entry_t entry;
|
|
int mincoreinfo;
|
|
|
|
/*
|
|
* Make sure that the addresses presented are valid for user
|
|
* mode.
|
|
*/
|
|
first_addr = addr = trunc_page((vm_offset_t) uap->addr);
|
|
end = addr + (vm_size_t)round_page(uap->len);
|
|
if (VM_MAXUSER_ADDRESS > 0 && end > VM_MAXUSER_ADDRESS)
|
|
return (EINVAL);
|
|
if (end < addr)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Address of byte vector
|
|
*/
|
|
vec = uap->vec;
|
|
|
|
map = &p->p_vmspace->vm_map;
|
|
pmap = &p->p_vmspace->vm_pmap;
|
|
|
|
vm_map_lock(map);
|
|
|
|
/*
|
|
* Not needed here
|
|
*/
|
|
#if 0
|
|
VM_MAP_RANGE_CHECK(map, addr, end);
|
|
#endif
|
|
|
|
if (!vm_map_lookup_entry(map, addr, &entry))
|
|
entry = entry->next;
|
|
|
|
/*
|
|
* Do this on a map entry basis so that if the pages are not
|
|
* in the current processes address space, we can easily look
|
|
* up the pages elsewhere.
|
|
*/
|
|
lastvecindex = -1;
|
|
for(current = entry;
|
|
(current != &map->header) && (current->start < end);
|
|
current = current->next) {
|
|
|
|
/*
|
|
* ignore submaps (for now) or null objects
|
|
*/
|
|
if (current->is_a_map || current->is_sub_map ||
|
|
current->object.vm_object == NULL)
|
|
continue;
|
|
|
|
/*
|
|
* limit this scan to the current map entry and the
|
|
* limits for the mincore call
|
|
*/
|
|
if (addr < current->start)
|
|
addr = current->start;
|
|
cend = current->end;
|
|
if (cend > end)
|
|
cend = end;
|
|
|
|
/*
|
|
* scan this entry one page at a time
|
|
*/
|
|
while(addr < cend) {
|
|
/*
|
|
* Check pmap first, it is likely faster, also
|
|
* it can provide info as to whether we are the
|
|
* one referencing or modifying the page.
|
|
*/
|
|
mincoreinfo = pmap_mincore(pmap, addr);
|
|
if (!mincoreinfo) {
|
|
vm_pindex_t pindex;
|
|
vm_ooffset_t offset;
|
|
vm_page_t m;
|
|
/*
|
|
* calculate the page index into the object
|
|
*/
|
|
offset = current->offset + (addr - current->start);
|
|
pindex = OFF_TO_IDX(offset);
|
|
m = vm_page_lookup(current->object.vm_object,
|
|
pindex);
|
|
/*
|
|
* if the page is resident, then gather information about
|
|
* it.
|
|
*/
|
|
if (m) {
|
|
mincoreinfo = MINCORE_INCORE;
|
|
if (m->dirty ||
|
|
pmap_is_modified(VM_PAGE_TO_PHYS(m)))
|
|
mincoreinfo |= MINCORE_MODIFIED_OTHER;
|
|
if ((m->flags & PG_REFERENCED) ||
|
|
pmap_is_referenced(VM_PAGE_TO_PHYS(m)))
|
|
mincoreinfo |= MINCORE_REFERENCED_OTHER;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* calculate index into user supplied byte vector
|
|
*/
|
|
vecindex = OFF_TO_IDX(addr - first_addr);
|
|
|
|
/*
|
|
* If we have skipped map entries, we need to make sure that
|
|
* the byte vector is zeroed for those skipped entries.
|
|
*/
|
|
while((lastvecindex + 1) < vecindex) {
|
|
error = subyte( vec + lastvecindex, 0);
|
|
if (error) {
|
|
vm_map_unlock(map);
|
|
return (EFAULT);
|
|
}
|
|
++lastvecindex;
|
|
}
|
|
|
|
/*
|
|
* Pass the page information to the user
|
|
*/
|
|
error = subyte( vec + vecindex, mincoreinfo);
|
|
if (error) {
|
|
vm_map_unlock(map);
|
|
return (EFAULT);
|
|
}
|
|
lastvecindex = vecindex;
|
|
addr += PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Zero the last entries in the byte vector.
|
|
*/
|
|
vecindex = OFF_TO_IDX(end - first_addr);
|
|
while((lastvecindex + 1) < vecindex) {
|
|
error = subyte( vec + lastvecindex, 0);
|
|
if (error) {
|
|
vm_map_unlock(map);
|
|
return (EFAULT);
|
|
}
|
|
++lastvecindex;
|
|
}
|
|
|
|
vm_map_unlock(map);
|
|
return (0);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mlock_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
};
|
|
#endif
|
|
int
|
|
mlock(p, uap, retval)
|
|
struct proc *p;
|
|
struct mlock_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
int error;
|
|
|
|
addr = (vm_offset_t) uap->addr;
|
|
size = uap->len;
|
|
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
|
|
/* disable wrap around */
|
|
if (addr + size < addr)
|
|
return (EINVAL);
|
|
|
|
if (atop(size) + cnt.v_wire_count > vm_page_max_wired)
|
|
return (EAGAIN);
|
|
|
|
#ifdef pmap_wired_count
|
|
if (size + ptoa(pmap_wired_count(vm_map_pmap(&p->p_vmspace->vm_map))) >
|
|
p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur)
|
|
return (EAGAIN);
|
|
#else
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
|
|
error = vm_map_pageable(&p->p_vmspace->vm_map, addr, addr + size, FALSE);
|
|
return (error == KERN_SUCCESS ? 0 : ENOMEM);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct munlock_args {
|
|
caddr_t addr;
|
|
size_t len;
|
|
};
|
|
#endif
|
|
int
|
|
munlock(p, uap, retval)
|
|
struct proc *p;
|
|
struct munlock_args *uap;
|
|
int *retval;
|
|
{
|
|
vm_offset_t addr;
|
|
vm_size_t size, pageoff;
|
|
int error;
|
|
|
|
addr = (vm_offset_t) uap->addr;
|
|
size = uap->len;
|
|
|
|
pageoff = (addr & PAGE_MASK);
|
|
addr -= pageoff;
|
|
size += pageoff;
|
|
size = (vm_size_t) round_page(size);
|
|
|
|
/* disable wrap around */
|
|
if (addr + size < addr)
|
|
return (EINVAL);
|
|
|
|
#ifndef pmap_wired_count
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
|
|
error = vm_map_pageable(&p->p_vmspace->vm_map, addr, addr + size, TRUE);
|
|
return (error == KERN_SUCCESS ? 0 : ENOMEM);
|
|
}
|
|
|
|
/*
|
|
* Internal version of mmap.
|
|
* Currently used by mmap, exec, and sys5 shared memory.
|
|
* Handle is either a vnode pointer or NULL for MAP_ANON.
|
|
*/
|
|
int
|
|
vm_mmap(map, addr, size, prot, maxprot, flags, handle, foff)
|
|
register vm_map_t map;
|
|
register vm_offset_t *addr;
|
|
register vm_size_t size;
|
|
vm_prot_t prot, maxprot;
|
|
register int flags;
|
|
caddr_t handle; /* XXX should be vp */
|
|
vm_ooffset_t foff;
|
|
{
|
|
boolean_t fitit;
|
|
vm_object_t object, object2;
|
|
struct vnode *vp = NULL;
|
|
objtype_t type;
|
|
int rv = KERN_SUCCESS;
|
|
vm_ooffset_t objsize;
|
|
int docow;
|
|
struct proc *p = curproc;
|
|
|
|
if (size == 0)
|
|
return (0);
|
|
|
|
objsize = size = round_page(size);
|
|
|
|
/*
|
|
* We currently can only deal with page aligned file offsets.
|
|
* The check is here rather than in the syscall because the
|
|
* kernel calls this function internally for other mmaping
|
|
* operations (such as in exec) and non-aligned offsets will
|
|
* cause pmap inconsistencies...so we want to be sure to
|
|
* disallow this in all cases.
|
|
*/
|
|
if (foff & PAGE_MASK)
|
|
return (EINVAL);
|
|
|
|
if ((flags & MAP_FIXED) == 0) {
|
|
fitit = TRUE;
|
|
*addr = round_page(*addr);
|
|
} else {
|
|
if (*addr != trunc_page(*addr))
|
|
return (EINVAL);
|
|
fitit = FALSE;
|
|
(void) vm_map_remove(map, *addr, *addr + size);
|
|
}
|
|
|
|
/*
|
|
* Lookup/allocate object.
|
|
*/
|
|
if (flags & MAP_ANON) {
|
|
type = OBJT_SWAP;
|
|
/*
|
|
* Unnamed anonymous regions always start at 0.
|
|
*/
|
|
if (handle == 0)
|
|
foff = 0;
|
|
} else {
|
|
vp = (struct vnode *) handle;
|
|
if (vp->v_type == VCHR) {
|
|
type = OBJT_DEVICE;
|
|
handle = (caddr_t) vp->v_rdev;
|
|
} else {
|
|
struct vattr vat;
|
|
int error;
|
|
|
|
error = VOP_GETATTR(vp, &vat, p->p_ucred, p);
|
|
if (error)
|
|
return (error);
|
|
objsize = round_page(vat.va_size);
|
|
type = OBJT_VNODE;
|
|
}
|
|
}
|
|
object = vm_pager_allocate(type, handle, OFF_TO_IDX(objsize), prot, foff);
|
|
if (object == NULL)
|
|
return (type == OBJT_DEVICE ? EINVAL : ENOMEM);
|
|
|
|
/*
|
|
* Force device mappings to be shared.
|
|
*/
|
|
if (type == OBJT_DEVICE) {
|
|
flags &= ~(MAP_PRIVATE|MAP_COPY);
|
|
flags |= MAP_SHARED;
|
|
}
|
|
|
|
object2 = NULL;
|
|
docow = 0;
|
|
if ((flags & (MAP_ANON|MAP_SHARED)) == 0) {
|
|
docow = MAP_COPY_ON_WRITE;
|
|
if (objsize < size) {
|
|
object2 = vm_object_allocate( OBJT_DEFAULT,
|
|
OFF_TO_IDX(size - (foff & ~PAGE_MASK)));
|
|
object2->backing_object = object;
|
|
object2->backing_object_offset = foff;
|
|
TAILQ_INSERT_TAIL(&object->shadow_head,
|
|
object2, shadow_list);
|
|
++object->shadow_count;
|
|
} else {
|
|
docow |= MAP_COPY_NEEDED;
|
|
}
|
|
}
|
|
|
|
if (object2)
|
|
rv = vm_map_find(map, object2, 0, addr, size, fitit,
|
|
prot, maxprot, docow);
|
|
else
|
|
rv = vm_map_find(map, object, foff, addr, size, fitit,
|
|
prot, maxprot, docow);
|
|
|
|
|
|
if (rv != KERN_SUCCESS) {
|
|
/*
|
|
* Lose the object reference. Will destroy the
|
|
* object if it's an unnamed anonymous mapping
|
|
* or named anonymous without other references.
|
|
*/
|
|
if (object2)
|
|
vm_object_deallocate(object2);
|
|
else
|
|
vm_object_deallocate(object);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* "Pre-fault" resident pages.
|
|
*/
|
|
if ((type == OBJT_VNODE) && (map->pmap != NULL)) {
|
|
pmap_object_init_pt(map->pmap, *addr,
|
|
object, (vm_pindex_t) OFF_TO_IDX(foff), size, 1);
|
|
}
|
|
|
|
/*
|
|
* Shared memory is also shared with children.
|
|
*/
|
|
if (flags & (MAP_SHARED|MAP_INHERIT)) {
|
|
rv = vm_map_inherit(map, *addr, *addr + size, VM_INHERIT_SHARE);
|
|
if (rv != KERN_SUCCESS) {
|
|
(void) vm_map_remove(map, *addr, *addr + size);
|
|
goto out;
|
|
}
|
|
}
|
|
out:
|
|
switch (rv) {
|
|
case KERN_SUCCESS:
|
|
return (0);
|
|
case KERN_INVALID_ADDRESS:
|
|
case KERN_NO_SPACE:
|
|
return (ENOMEM);
|
|
case KERN_PROTECTION_FAILURE:
|
|
return (EACCES);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
}
|