mirror of
https://git.yoctoproject.org/poky
synced 2026-03-19 05:39:39 +01:00
ed0a240e16
Changing the folder that holds the YP Reference Manual to be "ref-manual". This will help with confustion over the manual's intended purpose. (From yocto-docs rev: 1106442964b5080cb0b6b3bd3af32e9407c0f7c1) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
36 lines
2.0 KiB
HTML
36 lines
2.0 KiB
HTML
<html>
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||
<title>3.3. x32</title>
|
||
<link rel="stylesheet" type="text/css" href="../book.css">
|
||
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
|
||
<link rel="home" href="index.html" title="The Yocto Project Reference Manual">
|
||
<link rel="up" href="technical-details.html" title="Chapter 3. Technical Details">
|
||
<link rel="prev" href="invalidating-shared-state.html" title="3.2.4.2. Invalidating Shared State">
|
||
<link rel="next" href="support.html" title="3.3.1. Support">
|
||
</head>
|
||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="3.3. x32">
|
||
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
|
||
<a name="x32"></a>3.3. x32</h2></div></div></div>
|
||
<p>
|
||
x32 is a new processor-specific Application Binary Interface (psABI) for x86_64.
|
||
An ABI defines the calling conventions between functions in a processing environment.
|
||
The interface determines what registers are used and what the sizes are for various C data types.
|
||
</p>
|
||
<p>
|
||
Some processing environments prefer using 32-bit applications even when running
|
||
on Intel 64-bit platforms.
|
||
Consider the i386 psABI, which is a very old 32-bit ABI for Intel 64-bit platforms.
|
||
The i386 psABI does not provide efficient use and access of the Intel 64-bit processor resources,
|
||
leaving the system underutilized.
|
||
Now consider the x86_64 psABI.
|
||
This ABI is newer and uses 64-bits for data sizes and program pointers.
|
||
The extra bits increase the footprint size of the programs, libraries,
|
||
and also increases the memory and file system size requirements.
|
||
Executing under the x32 psABI enables user programs to utilize CPU and system resources
|
||
more efficiently while keeping the memory footprint of the applications low.
|
||
Extra bits are used for registers but not for addressing mechanisms.
|
||
</p>
|
||
</div></body>
|
||
</html>
|