mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
357 lines
7.7 KiB
C
357 lines
7.7 KiB
C
/*-
|
|
* Copyright (C) 2002 Benno Rice
|
|
* All rights reserved.
|
|
*
|
|
* 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 Benno Rice ``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 TOOLS GMBH 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.
|
|
*/
|
|
/*-
|
|
* Copyright (C) 1993 Wolfgang Solfrank.
|
|
* Copyright (C) 1993 TooLs GmbH.
|
|
* All rights reserved.
|
|
*
|
|
* 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 TooLs GmbH.
|
|
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
|
|
#include <machine/pcb.h>
|
|
#include <machine/sr.h>
|
|
|
|
int setfault(faultbuf); /* defined in locore.S */
|
|
|
|
/*
|
|
* Makes sure that the right segment of userspace is mapped in.
|
|
*/
|
|
static __inline void
|
|
set_user_sr(register_t vsid)
|
|
{
|
|
|
|
isync();
|
|
__asm __volatile ("mtsr %0,%1" :: "n"(USER_SR), "r"(vsid));
|
|
isync();
|
|
}
|
|
|
|
int
|
|
copyout(const void *kaddr, void *udaddr, size_t len)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
const char *kp;
|
|
char *up, *p;
|
|
size_t l;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (EFAULT);
|
|
}
|
|
|
|
kp = kaddr;
|
|
up = udaddr;
|
|
|
|
while (len > 0) {
|
|
p = (char *)USER_ADDR + ((u_int)up & ~SEGMENT_MASK);
|
|
|
|
l = ((char *)USER_ADDR + SEGMENT_LENGTH) - p;
|
|
if (l > len)
|
|
l = len;
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)up >> ADDR_SR_SHFT]);
|
|
|
|
bcopy(kp, p, l);
|
|
|
|
up += l;
|
|
kp += l;
|
|
len -= l;
|
|
}
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
copyin(const void *udaddr, void *kaddr, size_t len)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
const char *up;
|
|
char *kp, *p;
|
|
size_t l;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (EFAULT);
|
|
}
|
|
|
|
kp = kaddr;
|
|
up = udaddr;
|
|
|
|
while (len > 0) {
|
|
p = (char *)USER_ADDR + ((u_int)up & ~SEGMENT_MASK);
|
|
|
|
l = ((char *)USER_ADDR + SEGMENT_LENGTH) - p;
|
|
if (l > len)
|
|
l = len;
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)up >> ADDR_SR_SHFT]);
|
|
|
|
bcopy(p, kp, l);
|
|
|
|
up += l;
|
|
kp += l;
|
|
len -= l;
|
|
}
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
copyinstr(const void *udaddr, void *kaddr, size_t len, size_t *done)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
const char *up;
|
|
char *kp;
|
|
size_t l;
|
|
int rv, c;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (EFAULT);
|
|
}
|
|
|
|
kp = kaddr;
|
|
up = udaddr;
|
|
|
|
rv = ENAMETOOLONG;
|
|
|
|
for (l = 0; len-- > 0; l++) {
|
|
if ((c = fubyte(up++)) < 0) {
|
|
rv = EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (!(*kp++ = c)) {
|
|
l++;
|
|
rv = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (done != NULL) {
|
|
*done = l;
|
|
}
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (rv);
|
|
}
|
|
|
|
int
|
|
subyte(void *addr, int byte)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
char *p;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
p = (char *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (-1);
|
|
}
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
|
|
|
|
*p = (char)byte;
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
suword(void *addr, long word)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
long *p;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
p = (long *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (-1);
|
|
}
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
|
|
|
|
*p = word;
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
suword32(void *addr, int32_t word)
|
|
{
|
|
return (suword(addr, (long)word));
|
|
}
|
|
|
|
|
|
int
|
|
fubyte(const void *addr)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
u_char *p;
|
|
int val;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
p = (u_char *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (-1);
|
|
}
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
|
|
|
|
val = *p;
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (val);
|
|
}
|
|
|
|
long
|
|
fuword(const void *addr)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
long *p, val;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
p = (long *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (-1);
|
|
}
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
|
|
|
|
val = *p;
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (val);
|
|
}
|
|
|
|
int32_t
|
|
fuword32(const void *addr)
|
|
{
|
|
return ((int32_t)fuword(addr));
|
|
}
|
|
|
|
uint32_t
|
|
casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval)
|
|
{
|
|
return (casuword((volatile u_long *)base, oldval, newval));
|
|
}
|
|
|
|
u_long
|
|
casuword(volatile u_long *addr, u_long old, u_long new)
|
|
{
|
|
struct thread *td;
|
|
pmap_t pm;
|
|
faultbuf env;
|
|
u_long *p, val;
|
|
|
|
td = PCPU_GET(curthread);
|
|
pm = &td->td_proc->p_vmspace->vm_pmap;
|
|
p = (u_long *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
|
|
|
|
set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
|
|
|
|
if (setfault(env)) {
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
return (-1);
|
|
}
|
|
|
|
val = *p;
|
|
(void) atomic_cmpset_32((volatile uint32_t *)p, old, new);
|
|
|
|
td->td_pcb->pcb_onfault = NULL;
|
|
|
|
return (val);
|
|
}
|