88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/***************************************************
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* file: userconfig/uc_kmem.c
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*
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* Copyright (c) 1996 Eric L. Hernes (erich@rrnet.com)
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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. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id$
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <a.out.h>
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#include <stdio.h>
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#include "uc_main.h"
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/* translate a kv pointer to user space */
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/* malloc()-ing if we aren't mmaped */
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u_int
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kv_to_u(struct kernel *kp, u_int adr, u_int size){
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u_int tadr;
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if(!kp->incore){
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struct exec *ep;
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ep=(struct exec *)kp->core;
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tadr=(u_int)((adr - ep->a_entry + (N_DATOFF(*ep) - ep->a_text))+kp->core);
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} else {
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caddr_t ptr;
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ptr = malloc(size);
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lseek(kp->fd, adr, SEEK_SET);
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read(kp->fd, ptr, size);
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tadr=(u_int)ptr;
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}
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return(tadr);
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}
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/* dereference a pointer to kernel space */
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u_int
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kv_dref_p(struct kernel *kp, u_int adr){
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u_int tadr;
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if(!kp->incore){
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struct exec *ep;
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ep=(struct exec *)kp->core;
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tadr=*(u_int*)((adr - ep->a_entry + (N_DATOFF(*ep) - ep->a_text))+kp->core);
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} else {
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lseek(kp->fd, adr, SEEK_SET);
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read(kp->fd, &tadr, sizeof(tadr));
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}
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return(tadr);
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}
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/* deref a pointer to kernel text */
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u_int
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kv_dref_t(struct kernel *kp, u_int adr){
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u_int tadr;
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if(!kp->incore){
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struct exec *ep;
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ep=(struct exec *)kp->core;
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tadr=*(u_int*)((adr - ep->a_entry) + N_TXTOFF(*ep) + (u_int)kp->core);
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} else {
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lseek(kp->fd, adr, SEEK_SET);
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read(kp->fd, &tadr, sizeof(tadr));
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}
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return(tadr);
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}
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/* end of userconfig/uc_kmem.c */
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