141 lines
4.5 KiB
C
141 lines
4.5 KiB
C
/* $NetBSD: procfs_map.c,v 1.5 1999/04/10 14:00:38 drochner Exp $ */
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/*
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* Copyright (c) 1993 Jan-Simon Pendry
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)procfs_status.c 8.3 (Berkeley) 2/17/94
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*
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* $FreeBSD: procfs_map.c,v 1.18 1998/12/04 22:54:51 archie Exp $
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*/
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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 <sys/vnode.h>
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#include <miscfs/procfs/procfs.h>
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#include <vm/vm.h>
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#include <vm/vm_prot.h>
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#include <sys/lock.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_page.h>
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#include <uvm/uvm.h>
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#define MEBUFFERSIZE 256
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/*
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* The map entries can *almost* be read with programs like cat. However,
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* large maps need special programs to read. It is not easy to implement
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* a program that can sense the required size of the buffer, and then
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* subsequently do a read with the appropriate size. This operation cannot
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* be atomic. The best that we can do is to allow the program to do a read
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* with an arbitrarily large buffer, and return as much as we can. We can
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* return an error code if the buffer is too small (EFBIG), then the program
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* can try a bigger buffer.
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*/
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int
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procfs_domap(curp, p, pfs, uio)
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struct proc *curp;
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struct proc *p;
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struct pfsnode *pfs;
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struct uio *uio;
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{
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int len;
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int error;
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vm_map_t map = &p->p_vmspace->vm_map;
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vm_map_entry_t entry;
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char mebuffer[MEBUFFERSIZE];
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if (uio->uio_rw != UIO_READ)
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return (EOPNOTSUPP);
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if (uio->uio_offset != 0)
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return (0);
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error = 0;
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if (map != &curproc->p_vmspace->vm_map)
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vm_map_lock_read(map);
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for (entry = map->header.next;
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((uio->uio_resid > 0) && (entry != &map->header));
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entry = entry->next) {
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if (UVM_ET_ISSUBMAP(entry))
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continue;
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/*
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* format:
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* start, end, resident, private resident, cow, access, type.
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*/
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snprintf(mebuffer, sizeof(mebuffer),
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"0x%lx 0x%lx %c%c%c %c%c%c %s %s %d %d %d\n",
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entry->start, entry->end,
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(entry->protection & VM_PROT_READ) ? 'r' : '-',
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(entry->protection & VM_PROT_WRITE) ? 'w' : '-',
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(entry->protection & VM_PROT_EXECUTE) ? 'x' : '-',
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(entry->max_protection & VM_PROT_READ) ? 'r' : '-',
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(entry->max_protection & VM_PROT_WRITE) ? 'w' : '-',
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(entry->max_protection & VM_PROT_EXECUTE) ? 'x' : '-',
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(entry->etype & UVM_ET_COPYONWRITE) ? "COW" : "NCOW",
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(entry->etype & UVM_ET_NEEDSCOPY) ? "NC" : "NNC",
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entry->inheritance, entry->wired_count , entry->advice
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);
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len = strlen(mebuffer);
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if (len > uio->uio_resid) {
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error = EFBIG;
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break;
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}
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error = uiomove(mebuffer, len, uio);
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if (error)
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break;
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}
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if (map != &curproc->p_vmspace->vm_map)
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vm_map_unlock_read(map);
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return error;
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}
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int
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procfs_validmap(p)
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struct proc *p;
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{
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return ((p->p_flag & P_SYSTEM) == 0);
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}
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