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16142b2b03
freebsd-dev/sys/powerpc/aim/copyinout.c
Peter Grehan 919cb3362f Kernel changes for libthr (and probably libpthread). 
include/ucontext.h
 - remove trapframe and switch over to 'generic' description of machine
   state. Include version field to help with future modifications.
   Include floating point and altivec state, and hopefully align
   correctly

powerpc/copyinout.c
 - fill out casuptr() sync primitive, required by kern_umtx.c

powerpc/machdep.c
 - shifted proc0/thread0/pcpu setup to before cninit, since
   syscons -> make_dev -> devlock requires a valid curthread
 - implemented get_mcontext/set_mcontext
 - recast sendsig/sigreturn to use get/set_mcontext and new
   ucontext struct. floating point now saved
 - TODO: save/restore altivec state

powerpc/vm_machdep.c
 - implemented cpu_thread_setup/cpu_set_upcall/cpu_set_upcall_kse
 - eliminated trailing whitespace

Submitted by:  Suleiman Souhlal <refugee@segfaulted.com>, ucontext by grehan
2004-03-02 06:13:09 +00:00

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/*
* 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));
}
intptr_t
casuptr(intptr_t *addr, intptr_t old, intptr_t new)
{
struct thread *td;
pmap_t pm;
faultbuf env;
intptr_t *p, val;
td = PCPU_GET(curthread);
pm = &td->td_proc->p_vmspace->vm_pmap;
p = (intptr_t *)((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(p, old, new);
td->td_pcb->pcb_onfault = NULL;
return (val);
}
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