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-<h2>vm_copy</h2>
<hr>
<p>
<strong>Function</strong> - Copy a region of virtual memory.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t   vm_copy</strong>
                <strong>(vm_task_t</strong>            <var>target_task</var>,
                 <strong>vm_address_t</strong>      <var>source_address</var>,
                 <strong>vm_size_t</strong>                  <var>count</var>,
                 <strong>vm_address_t</strong>        <var>dest_address</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>target_task</var> 
<dd>
[in task send right]
The port for the task whose memory is to be copied.
<p>
<dt> <var>source_address</var> 
<dd>
[in scalar]
The starting address for the source region.  The address must 
be on a page boundary.
<p>
<dt> <var>count</var> 
<dd>
[in scalar]
The number of bytes in the source region.  The number of 
bytes must convert to an integral number of virtual pages.
<p>
<dt> <var>dest_address</var> 
<dd>
[in scalar]
The starting address for the destination region.  The address 
must be on a page boundary.
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>vm_copy</strong> function copies a source region to a destination
region within the 
same task's virtual memory.  It is semantically equivalent to
<strong>vm_read</strong> followed 
by <strong>vm_write</strong>.  The destination region can overlap the source region.
<p>
The destination region must already be allocated.  The source region must be 
readable, and the destination region must be writable.
<h3>NOTES</h3>
<p>
This interface is machine word length specific because of the virtual address
parameter.
<h3>RETURN VALUES</h3>
<dl>
<p>
<dt> <strong>KERN_PROTECTION_FAILURE</strong>
<dd>
The source region is protected against reading, or the destination
region is protected against writing.
<p>
<dt> <strong>KERN_INVALID_ADDRESS</strong>
<dd>
An address is illegal or specifies a non-allocated region, or there is not 
enough memory following one of the addresses.
</dl>
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="vm_protect.html"><strong>vm_protect</strong></a>,
<a href="vm_read.html"><strong>vm_read</strong></a>,
<a href="vm_write.html"><strong>vm_write</strong></a>,
<a href="host_page_size.html"><strong>host_page_size</strong></a>.
\ No newline at end of file
+<h2>vm_copy</h2>
+<hr>
+<p>
+<strong>Function</strong> - Copy a region of virtual memory.
+<h3>SYNOPSIS</h3>
+<pre>
+<strong>kern_return_t   vm_copy</strong>
+                <strong>(vm_task_t</strong>            <var>target_task</var>,
+                 <strong>vm_address_t</strong>      <var>source_address</var>,
+                 <strong>vm_size_t</strong>                  <var>count</var>,
+                 <strong>vm_address_t</strong>        <var>dest_address</var><strong>);</strong>
+</pre>
+<h3>PARAMETERS</h3>
+<dl>
+<p>
+<dt> <var>target_task</var> 
+<dd>
+[in task send right]
+The port for the task whose memory is to be copied.
+<p>
+<dt> <var>source_address</var> 
+<dd>
+[in scalar]
+The starting address for the source region.  The address must 
+be on a page boundary.
+<p>
+<dt> <var>count</var> 
+<dd>
+[in scalar]
+The number of bytes in the source region.  The number of 
+bytes must convert to an integral number of virtual pages.
+<p>
+<dt> <var>dest_address</var> 
+<dd>
+[in scalar]
+The starting address for the destination region.  The address 
+must be on a page boundary.
+</dl>
+<h3>DESCRIPTION</h3>
+<p>
+The <strong>vm_copy</strong> function copies a source region to a destination
+region within the 
+same task's virtual memory.  It is semantically equivalent to
+<strong>vm_read</strong> followed 
+by <strong>vm_write</strong>.  The destination region can overlap the source region.
+<p>
+The destination region must already be allocated.  The source region must be 
+readable, and the destination region must be writable.
+<h3>NOTES</h3>
+<p>
+This interface is machine word length specific because of the virtual address
+parameter.
+<h3>RETURN VALUES</h3>
+<dl>
+<p>
+<dt> <strong>KERN_PROTECTION_FAILURE</strong>
+<dd>
+The source region is protected against reading, or the destination
+region is protected against writing.
+<p>
+<dt> <strong>KERN_INVALID_ADDRESS</strong>
+<dd>
+An address is illegal or specifies a non-allocated region, or there is not 
+enough memory following one of the addresses.
+</dl>
+<h3>RELATED INFORMATION</h3>
+<p>
+Functions:
+<a href="vm_protect.html"><strong>vm_protect</strong></a>,
+<a href="vm_read.html"><strong>vm_read</strong></a>,
+<a href="vm_write.html"><strong>vm_write</strong></a>,
+<a href="host_page_size.html"><strong>host_page_size</strong></a>.