UNIX C Program for Segmentation | CS1254-Operating Systems Lab

AIM:
To write a LINUX/UNIX C Program for the Implementation of Segmentation in CS1254 - Operating Systems Laboratory.

SOURCE CODE:
#include<stdio.h>
#include<conio.h>
struct list
{
int seg;
int base;
int limit;
struct list *next;
} *p;
void insert(struct list *q,int base,int limit,int seg)
{
if(p==NULL)
{
p=malloc(sizeof(Struct list));
p->limit=limit;
p->base=base;
p->seg=seg;
p->next=NULL;
}
else
{
while(q->next!=NULL)
{
Q=q->next;
Printf(“yes”)
}
q->next=malloc(sizeof(Struct list));
q->next ->limit=limit;
q->next ->base=base;
q->next ->seg=seg;
q->next ->next=NULL;
}
}
int find(struct list *q,int seg)
{
while(q->seg!=seg)
{
q=q->next;
}
return q->limit;
}
int search(struct list *q,int seg)
{
while(q->seg!=seg)
{
q=q->next;
}
return q->base;
}
main()
{
p=NULL;
int seg,offset,limit,base,c,s,physical;
printf(“Enter segment table/n”);
printf(“Enter -1 as segment value for termination\n”);
do
{
printf(“Enter segment number”);
scanf(“%d”,&seg);
if(seg!=-1)
{
printf(“Enter base value:”);
scanf(“%d”,&base);
printf(“Enter value for limit:”);
scanf(“%d”,&limit);
insert(p,base,lmit,seg);
}
}
while(seg!=-1)
printf(“Enter offset:”);
scanf(“%d”,&offset);
printf(“Enter bsegmentation number:”);
scanf(“%d”,&seg);
c=find(p,seg);
s=search(p,seg);
if(offset<c)
{
physical=s+offset;
printf(“Address in physical memory %d\n”,physical);
}
else
{
printf(“error”);
}
}

OUTPUT:

[examuser56@localhost ~]$ cc seg.c
[examuser56@localhost ~]$ ./a.out

Enter segment table
Enter -1 as segmentation value for termination
Enter segment number:1
Enter base value:2000
Enter value for limit:100
Enter segment number:2
Enter base value:2500
Enter value for limit:100
Enter segmentation number:-1
Enter offset:90
Enter segment number:2
Address in physical memory 2590

[examuser56@localhost ~]$ ./a.out

Enter segment table
Enter -1 as segmentation value for termination
Enter segment number:1
Enter base value:2000
Enter value for limit:100
Enter segment number:2
Enter base value:2500
Enter value for limit:100
Enter segmentation number:-1
Enter offset:90
Enter segment number:1
Address in physical memory 2090

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