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/***************************************************
* file: userconfig/uc_kmem.c
*
* Copyright (c) 1996 Eric L. Hernes (erich@rrnet.com)
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <a.out.h>
#include <stdio.h>
#include "uc_main.h"
/* translate a kv pointer to user space */
/* malloc()-ing if we aren't mmaped */
u_int
kv_to_u(struct kernel *kp, u_int adr, u_int size){
u_int tadr;
if(!kp->incore){
struct exec *ep;
ep=(struct exec *)kp->core;
tadr=(u_int)((adr - ep->a_entry + (N_DATOFF(*ep) - ep->a_text))+kp->core);
} else {
caddr_t ptr;
ptr = malloc(size);
lseek(kp->fd, adr, SEEK_SET);
read(kp->fd, ptr, size);
tadr=(u_int)ptr;
}
return(tadr);
}
/* dereference a pointer to kernel space */
u_int
kv_dref_p(struct kernel *kp, u_int adr){
u_int tadr;
if(!kp->incore){
struct exec *ep;
ep=(struct exec *)kp->core;
tadr=*(u_int*)((adr - ep->a_entry + (N_DATOFF(*ep) - ep->a_text))+kp->core);
} else {
lseek(kp->fd, adr, SEEK_SET);
read(kp->fd, &tadr, sizeof(tadr));
}
return(tadr);
}
/* deref a pointer to kernel text */
u_int
kv_dref_t(struct kernel *kp, u_int adr){
u_int tadr;
if(!kp->incore){
struct exec *ep;
ep=(struct exec *)kp->core;
tadr=*(u_int*)((adr - ep->a_entry) + N_TXTOFF(*ep) + (u_int)kp->core);
} else {
lseek(kp->fd, adr, SEEK_SET);
read(kp->fd, &tadr, sizeof(tadr));
}
return(tadr);
}
/* end of userconfig/uc_kmem.c */
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