bug solved version of munmap

linux/mm/memory.c

@@ -466,7 +466,6 @@ void calc_mem(void)
 	}
 }
 
-
 static int my_share(unsigned long address, struct task_struct * p)
 {
 	unsigned long from;
@@ -505,10 +504,9 @@ static int my_share(unsigned long address, struct task_struct * p)
 
 long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 {
-	printk("start mmaping\n");
 	/* va_list args;
 	va_start(args,len); */
-	int prot=3,flags=1,fd=3,off=0;
+	int prot=3,flags=2,fd=3,off=0;
 	/* prot=va_arg(args,int);flags=va_arg(args,int);fd=va_arg(args,int);
 	off_t off=va_arg(args,off_t);
 	int *ll=&len;printk("%d,%d,%d,%d,%d\n",*ll,*(ll+1),*(ll+2),*(ll+3),*(ll+4));
@@ -544,12 +542,11 @@ long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 	if(!(prot& PROT_READ)) return MAP_FAILED;
 
 	//permissions of the file ,搬运函数namei.c::permissions
-	printk("fd: %d\n",fd);
+
 	struct m_inode *inode=current->filp[fd]->f_inode;
-	printk("end of permissions\n");
 	int mode = inode->i_mode;
 	if (inode->i_dev && !inode->i_nlinks)
-		{printk("end of permissions1\n");return MAP_FAILED;}
+		return MAP_FAILED;
 	else if (current->euid==inode->i_uid)
 		mode >>= 6;
 	else if (current->egid==inode->i_gid)
@@ -560,7 +557,6 @@ long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 		return MAP_FAILED;
 	}
 	//end of permission check
-	printk("end of permissions\n");
 	
 	//设置用户空间的虚拟地址，初始为32MB处，这样写在brk增长至32MB时会有bug,我们忽略
 	//同时，当栈向下增长到一定程度时，也会和当前地址冲突，我们忽略
@@ -580,7 +576,6 @@ long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 	mmap->ps=flags;
 	mmap->filenode=(struct m_inode*)malloc(sizeof(struct m_inode));
 	memcpy(mmap->filenode,inode,sizeof(struct m_inode));
-	printk("izone[0]:%x:\n",inode->i_zone[0]);
 	if(!mmap->filenode->i_count)mmap->filenode->i_count=1;
 	mmap->off=off;
 	mmap->next=NULL;
@@ -591,7 +586,6 @@ long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 		current->mmap_tail->next=mmap;
 		current->mmap_tail=mmap;
 	}
-	printk("buf: %x\n",(unsigned long )buf);
 	
 	//分配物理页
 
@@ -635,7 +629,7 @@ long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 		
 		if(flags & MAP_SHARED)
 		{
-			printk("i am doing sharing.");
+			//printk("i am doing sharing.");
 			struct task_struct ** p;
 
 			for (p = &LAST_TASK ; p > &FIRST_TASK ; --p) {
@@ -661,7 +655,6 @@ long sys_mmap(void * start,size_t len,...)// int prot,int flags,int fd,off_t off
 	p1=temp+off;p2=buf;
 	while(l--)
 		put_fs_byte(*(p1++),p2++);
-	printk("%s\n",temp+off);
 	return buf;
 }
 static int my_sync(off_t pos, struct m_inode * inode, char * buf, int count)
@@ -671,21 +664,6 @@ static int my_sync(off_t pos, struct m_inode * inode, char * buf, int count)
 	char * p;
 	int i=0;
 
-	//int block;
-	//struct buffer_head * bh;
-	struct dir_entry * de;
-	int ttp=0;;
-	printk("sync:izone[0]:%x:\n",inode->i_zone[0]);
-	if (!(block = inode->i_zone[0]))
-		return -1;
-	if (!(bh = bread(inode->i_dev,block)))
-		return -1;
-	de=(char*)bh->b_data;
-	for(ttp=0;ttp<count;ttp++)
-	{
-		printk("char:%c,",*(de+ttp));
-	}
-
 	while (i<count) {
 		if (!(block = create_block(inode,pos/BLOCK_SIZE)))
 			break;
@@ -741,7 +719,6 @@ int sys_munmap(void * start ,size_t size)
 	else{
 		pre->next=temp->next;
 	}
-	printk("addr: %lx,endaddr : %lx\n",temp->address,temp->endaddr);
 	unsigned long from;
 	unsigned long to;
 	unsigned long from_page;
@@ -818,21 +795,9 @@ mytag:
 		else{
 			*(unsigned long *)from_page &= ~1;
 		}
+		address+=PAGE_SIZE;
 	}
-	int block;
-	struct buffer_head * bh;
-	struct dir_entry * de;
-	int ttp=0;;
-	printk("temp->izone[0]:%x:\n",temp->filenode->i_zone[0]);
-	if (!(block = temp->filenode->i_zone[0]))
-		return -1;
-	if (!(bh = bread(temp->filenode->i_dev,block)))
-		return -1;
-	de=(char*)bh->b_data;
-	for(ttp=0;ttp<temp->size;ttp++)
-	{
-		printk("char:%c,",*(de+ttp));
-	}
+	free(temp->filenode);
 	free(temp);
 	return 0;
 }