Date: Wed, 05 Nov 1997 10:32:01 -0500 (EST) From: Patrick Gardella <patrick@cre8tivegroup.com> To: Bill Sandiford <bill@duey.interlinks.net> Cc: freebsd-questions@freebsd.org Subject: RE: Help - accidently delete important src file. Message-ID: <XFMail.971105103402.patrick@cre8tivegroup.com> In-Reply-To: <Pine.BSF.3.96.971105105705.657A-100000@duey.interlinks.net>
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Fint attached. The patch is installed.
I am on a 2.2.1 machine (awaiting my 2.2.5 CD :)
Patrick
On 05-Nov-97 Bill Sandiford wrote:
>Please excuse my ignorance but I am totally new to FreeBSD and unix in
>general.
>
>While trying to apply the recent open patch I accidently deleted the file
>/usr/src/sys/i386/i386/mem.c
>
>Where am I able to get another copy. I tried looking around
>ftp.freebsd.org but got totally lost. I downloaded FreeBSD so I don't
>have the CD or anything.
>
>Your help is mutch appreciated.
>
>Bill
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Content-Description: mem.c
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/*-
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990 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, and code derived from software contributed to
* Berkeley by William Jolitz.
*
* 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 $Hdr: mem.c 1.13 89/10/08$
* from: @(#)mem.c 7.2 (Berkeley) 5/9/91
* $Id: mem.c,v 1.38 1996/09/27 13:25:06 peter Exp $
*/
/*
* Memory special file
*/
#include "opt_perfmon.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/buf.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /* DEVFS */
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <machine/cpu.h>
#include <machine/random.h>
#include <machine/psl.h>
#ifdef PERFMON
#include <machine/perfmon.h>
#endif
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/lock.h>
#include <vm/vm_prot.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
static d_open_t mmopen;
static d_close_t mmclose;
static d_read_t mmrw;
static d_ioctl_t mmioctl;
static d_mmap_t memmmap;
static d_select_t mmselect;
#define CDEV_MAJOR 2
static struct cdevsw mem_cdevsw =
{ mmopen, mmclose, mmrw, mmrw, /*2*/
mmioctl, nullstop, nullreset, nodevtotty,/* memory */
mmselect, memmmap, NULL, "mem", NULL, -1 };
static caddr_t zbuf;
#ifdef DEVFS
static void *mem_devfs_token;
static void *kmem_devfs_token;
static void *null_devfs_token;
static void *random_devfs_token;
static void *urandom_devfs_token;
static void *zero_devfs_token;
static void *io_devfs_token;
#ifdef PERFMON
static void *perfmon_devfs_token;
#endif
static void memdevfs_init __P((void));
static void
memdevfs_init()
{
mem_devfs_token =
devfs_add_devswf(&mem_cdevsw, 0, DV_CHR,
UID_ROOT, GID_KMEM, 0640, "mem");
kmem_devfs_token =
devfs_add_devswf(&mem_cdevsw, 1, DV_CHR,
UID_ROOT, GID_KMEM, 0640, "kmem");
null_devfs_token =
devfs_add_devswf(&mem_cdevsw, 2, DV_CHR,
UID_ROOT, GID_WHEEL, 0666, "null");
random_devfs_token =
devfs_add_devswf(&mem_cdevsw, 3, DV_CHR,
UID_ROOT, GID_WHEEL, 0644, "random");
urandom_devfs_token =
devfs_add_devswf(&mem_cdevsw, 4, DV_CHR,
UID_ROOT, GID_WHEEL, 0644, "urandom");
zero_devfs_token =
devfs_add_devswf(&mem_cdevsw, 12, DV_CHR,
UID_ROOT, GID_WHEEL, 0666, "zero");
io_devfs_token =
devfs_add_devswf(&mem_cdevsw, 14, DV_CHR,
UID_ROOT, GID_WHEEL, 0600, "io");
#ifdef PERFMON
perfmon_devfs_token =
devfs_add_devswf(&mem_cdevsw, 32, DV_CHR,
UID_ROOT, GID_KMEM, 0640, "perfmon");
#endif /* PERFMON */
}
#endif /* DEVFS */
extern char *ptvmmap; /* poor name! */
static int
mmclose(dev, flags, fmt, p)
dev_t dev;
int flags;
int fmt;
struct proc *p;
{
struct trapframe *fp;
switch (minor(dev)) {
#ifdef PERFMON
case 32:
return perfmon_close(dev, flags, fmt, p);
#endif
case 14:
fp = (struct trapframe *)curproc->p_md.md_regs;
fp->tf_eflags &= ~PSL_IOPL;
break;
default:
break;
}
return(0);
}
static int
mmopen(dev, flags, fmt, p)
dev_t dev;
int flags;
int fmt;
struct proc *p;
{
int error;
struct trapframe *fp;
switch (minor(dev)) {
case 32:
#ifdef PERFMON
return perfmon_open(dev, flags, fmt, p);
#else
return ENODEV;
#endif
case 14:
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0)
return (error);
if (securelevel > 0)
return (EPERM);
fp = (struct trapframe *)curproc->p_md.md_regs;
fp->tf_eflags |= PSL_IOPL;
break;
default:
break;
}
return(0);
}
static int
mmrw(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
register int o;
register u_int c, v;
u_int poolsize;
register struct iovec *iov;
int error = 0;
caddr_t buf = NULL;
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
if (uio->uio_iovcnt < 0)
panic("mmrw");
continue;
}
switch (minor(dev)) {
/* minor device 0 is physical memory */
case 0:
v = uio->uio_offset;
pmap_enter(kernel_pmap, (vm_offset_t)ptvmmap, v,
uio->uio_rw == UIO_READ ? VM_PROT_READ : VM_PROT_WRITE,
TRUE);
o = (int)uio->uio_offset & PAGE_MASK;
c = (u_int)(PAGE_SIZE - ((int)iov->iov_base & PAGE_MASK));
c = min(c, (u_int)(PAGE_SIZE - o));
c = min(c, (u_int)iov->iov_len);
error = uiomove((caddr_t)&ptvmmap[o], (int)c, uio);
pmap_remove(kernel_pmap, (vm_offset_t)ptvmmap,
(vm_offset_t)&ptvmmap[PAGE_SIZE]);
continue;
/* minor device 1 is kernel memory */
case 1: {
vm_offset_t addr, eaddr;
c = iov->iov_len;
/*
* Make sure that all of the pages are currently resident so
* that we don't create any zero-fill pages.
*/
addr = trunc_page(uio->uio_offset);
eaddr = round_page(uio->uio_offset + c);
for (; addr < eaddr; addr += PAGE_SIZE)
if (pmap_extract(kernel_pmap, addr) == 0)
return EFAULT;
if (!kernacc((caddr_t)(int)uio->uio_offset, c,
uio->uio_rw == UIO_READ ? B_READ : B_WRITE))
return(EFAULT);
error = uiomove((caddr_t)(int)uio->uio_offset, (int)c, uio);
continue;
}
/* minor device 2 is EOF/RATHOLE */
case 2:
if (uio->uio_rw == UIO_READ)
return (0);
c = iov->iov_len;
break;
/* minor device 3 (/dev/random) is source of filth on read, rathole on write */
case 3:
if (uio->uio_rw == UIO_WRITE) {
c = iov->iov_len;
break;
}
if (buf == NULL)
buf = (caddr_t)
malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
c = min(iov->iov_len, PAGE_SIZE);
poolsize = read_random(buf, c);
if (poolsize == 0) {
if (buf)
free(buf, M_TEMP);
return (0);
}
c = min(c, poolsize);
error = uiomove(buf, (int)c, uio);
continue;
/* minor device 4 (/dev/urandom) is source of muck on read, rathole on write */
case 4:
if (uio->uio_rw == UIO_WRITE) {
c = iov->iov_len;
break;
}
if (buf == NULL)
buf = (caddr_t)
malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
c = min(iov->iov_len, PAGE_SIZE);
poolsize = read_random_unlimited(buf, c);
c = min(c, poolsize);
error = uiomove(buf, (int)c, uio);
continue;
/* minor device 12 (/dev/zero) is source of nulls on read, rathole on write */
case 12:
if (uio->uio_rw == UIO_WRITE) {
c = iov->iov_len;
break;
}
if (zbuf == NULL) {
zbuf = (caddr_t)
malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
bzero(zbuf, PAGE_SIZE);
}
c = min(iov->iov_len, PAGE_SIZE);
error = uiomove(zbuf, (int)c, uio);
continue;
#ifdef notyet
/* 386 I/O address space (/dev/ioport[bwl]) is a read/write access to seperate
i/o device address bus, different than memory bus. Semantics here are
very different than ordinary read/write, as if iov_len is a multiple
an implied string move from a single port will be done. Note that lseek
must be used to set the port number reliably. */
case 14:
if (iov->iov_len == 1) {
u_char tmp;
tmp = inb(uio->uio_offset);
error = uiomove (&tmp, iov->iov_len, uio);
} else {
if (!useracc((caddr_t)iov->iov_base,
iov->iov_len, uio->uio_rw))
return (EFAULT);
insb(uio->uio_offset, iov->iov_base,
iov->iov_len);
}
break;
case 15:
if (iov->iov_len == sizeof (short)) {
u_short tmp;
tmp = inw(uio->uio_offset);
error = uiomove (&tmp, iov->iov_len, uio);
} else {
if (!useracc((caddr_t)iov->iov_base,
iov->iov_len, uio->uio_rw))
return (EFAULT);
insw(uio->uio_offset, iov->iov_base,
iov->iov_len/ sizeof (short));
}
break;
case 16:
if (iov->iov_len == sizeof (long)) {
u_long tmp;
tmp = inl(uio->uio_offset);
error = uiomove (&tmp, iov->iov_len, uio);
} else {
if (!useracc((caddr_t)iov->iov_base,
iov->iov_len, uio->uio_rw))
return (EFAULT);
insl(uio->uio_offset, iov->iov_base,
iov->iov_len/ sizeof (long));
}
break;
#endif
default:
return (ENXIO);
}
if (error)
break;
iov->iov_base += c;
iov->iov_len -= c;
uio->uio_offset += c;
uio->uio_resid -= c;
}
if (buf)
free(buf, M_TEMP);
return (error);
}
/*******************************************************\
* allow user processes to MMAP some memory sections *
* instead of going through read/write *
\*******************************************************/
static int
memmmap(dev_t dev, int offset, int nprot)
{
switch (minor(dev))
{
/* minor device 0 is physical memory */
case 0:
return i386_btop(offset);
/* minor device 1 is kernel memory */
case 1:
return i386_btop(vtophys(offset));
default:
return -1;
}
}
/*
* Allow userland to select which interrupts will be used in the muck
* gathering business.
*/
static int
mmioctl(dev, cmd, cmdarg, flags, p)
dev_t dev;
int cmd;
caddr_t cmdarg;
int flags;
struct proc *p;
{
static u_int16_t interrupt_allowed = 0;
u_int16_t interrupt_mask;
int error;
switch(minor(dev)) {
case 3:
case 4:
break;
#ifdef PERFMON
case 32:
return perfmon_ioctl(dev, cmd, cmdarg, flags, p);
#endif
default:
return ENODEV;
}
if (*(u_int16_t *)cmdarg >= 16)
return (EINVAL);
/* Only root can do this */
error = suser(p->p_ucred, &p->p_acflag);
if (error) {
return (error);
}
interrupt_mask = 1 << *(u_int16_t *)cmdarg;
switch (cmd) {
case MEM_SETIRQ:
if (!(interrupt_allowed & interrupt_mask)) {
disable_intr();
interrupt_allowed |= interrupt_mask;
sec_intr_handler[*(u_int16_t *)cmdarg] =
intr_handler[*(u_int16_t *)cmdarg];
intr_handler[*(u_int16_t *)cmdarg] =
add_interrupt_randomness;
sec_intr_unit[*(u_int16_t *)cmdarg] =
intr_unit[*(u_int16_t *)cmdarg];
intr_unit[*(u_int16_t *)cmdarg] =
*(u_int16_t *)cmdarg;
enable_intr();
}
else return (EPERM);
break;
case MEM_CLEARIRQ:
if (interrupt_allowed & interrupt_mask) {
disable_intr();
interrupt_allowed &= ~(interrupt_mask);
intr_handler[*(u_int16_t *)cmdarg] =
sec_intr_handler[*(u_int16_t *)cmdarg];
intr_unit[*(u_int16_t *)cmdarg] =
sec_intr_unit[*(u_int16_t *)cmdarg];
enable_intr();
}
else return (EPERM);
break;
case MEM_RETURNIRQ:
*(u_int16_t *)cmdarg = interrupt_allowed;
break;
default:
return (ENOTTY);
}
return (0);
}
int
mmselect(dev, rw, p)
dev_t dev;
int rw;
struct proc *p;
{
switch (minor(dev)) {
case 3: /* /dev/random */
return random_select(dev, rw, p);
case 4: /* /dev/urandom */
default:
return seltrue(dev, rw, p);
}
}
/*
* Routine that identifies /dev/mem and /dev/kmem.
*
* A minimal stub routine can always return 0.
*/
int
iskmemdev(dev)
dev_t dev;
{
return ((major(dev) == mem_cdevsw.d_maj)
&& (minor(dev) == 0 || minor(dev) == 1));
}
int
iszerodev(dev)
dev_t dev;
{
return ((major(dev) == mem_cdevsw.d_maj)
&& minor(dev) == 12);
}
static mem_devsw_installed = 0;
static void
mem_drvinit(void *unused)
{
dev_t dev;
if( ! mem_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&mem_cdevsw, NULL);
mem_devsw_installed = 1;
#ifdef DEVFS
memdevfs_init();
#endif
}
}
SYSINIT(memdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,mem_drvinit,NULL)
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