bf76ba7826
This allows me to reimplement [sf]u{byte,word} as separate functions and not
as calls to copy{in,out}.
261 lines
6.0 KiB
C
261 lines
6.0 KiB
C
/*
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* Copyright (C) 2002 Benno Rice
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (C) 1993 Wolfgang Solfrank.
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* Copyright (C) 1993 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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/*
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* Makes sure that the right segment of userspace is mapped in.
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*/
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static __inline void
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set_user_sr(register_t vsid)
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{
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isync();
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__asm __volatile ("mtsr %0,%1" :: "n"(USER_SR), "r"(vsid));
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isync();
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}
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int
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copyout(const void *kaddr, void *udaddr, size_t len)
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{
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struct thread *td;
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pmap_t pm;
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const char *kp;
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char *up, *p;
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size_t l;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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kp = kaddr;
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up = udaddr;
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while (len > 0) {
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p = (char *)USER_ADDR + ((u_int)up & ~SEGMENT_MASK);
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l = ((char *)USER_ADDR + SEGMENT_LENGTH) - p;
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if (l > len)
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l = len;
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set_user_sr(pm->pm_sr[(u_int)up >> ADDR_SR_SHFT]);
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bcopy(kp, p, l);
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up += l;
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kp += l;
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len -= l;
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}
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return (0);
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}
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int
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copyin(const void *udaddr, void *kaddr, size_t len)
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{
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struct thread *td;
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pmap_t pm;
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const char *up;
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char *kp, *p;
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size_t l;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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kp = kaddr;
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up = udaddr;
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while (len > 0) {
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p = (char *)USER_ADDR + ((u_int)up & ~SEGMENT_MASK);
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l = ((char *)USER_ADDR + SEGMENT_LENGTH) - p;
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if (l > len)
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l = len;
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set_user_sr(pm->pm_sr[(u_int)up >> ADDR_SR_SHFT]);
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bcopy(p, kp, l);
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up += l;
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kp += l;
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len -= l;
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}
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return (0);
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}
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int
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copyinstr(const void *udaddr, void *kaddr, size_t len, size_t *done)
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{
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struct thread *td;
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pmap_t pm;
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const char *up;
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char *kp;
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size_t l;
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int rv, c;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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kp = kaddr;
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up = udaddr;
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rv = ENAMETOOLONG;
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for (l = 0; len-- > 0; l++) {
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if ((c = fubyte(up++)) < 0) {
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rv = EFAULT;
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break;
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}
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if (!(*kp++ = c)) {
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l++;
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rv = 0;
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break;
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}
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}
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if (done != NULL) {
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*done = l;
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}
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return (rv);
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}
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int
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subyte(void *addr, int byte)
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{
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struct thread *td;
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pmap_t pm;
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char *p;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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p = (char *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
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set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
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*p = (char)byte;
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return (0);
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}
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int
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suibyte(void *addr, int byte)
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{
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return (subyte(addr, byte));
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}
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int
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suword(void *addr, long word)
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{
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struct thread *td;
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pmap_t pm;
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long *p;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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p = (long *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
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set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
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*p = word;
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return (0);
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}
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int
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fubyte(const void *addr)
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{
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struct thread *td;
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pmap_t pm;
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char *p;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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p = (char *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
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set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
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return ((int)*p);
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}
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long
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fuword(const void *addr)
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{
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struct thread *td;
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pmap_t pm;
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long *p;
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td = PCPU_GET(curthread);
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pm = &td->td_proc->p_vmspace->vm_pmap;
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p = (long *)((u_int)USER_ADDR + ((u_int)addr & ~SEGMENT_MASK));
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set_user_sr(pm->pm_sr[(u_int)addr >> ADDR_SR_SHFT]);
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return (*p);
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}
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