<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Trap handling functionality"><title>os::trap - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../../static.files/rustdoc-fa3bb1812debf86c.css"><metaname="rustdoc-vars"data-root-path="../../"data-static-root-path="../../static.files/"data-current-crate="os"data-themes=""data-resource-suffix=""data-rustdoc-version="1.75.0-nightly (bf9a1c8a1 2023-10-08)"data-channel="nightly"data-search-js="search-5f5ec5419eadd0c9.js"data-settings-js="settings-74424d7eec62a23e.js"><scriptsrc="../../static.files/storage-fec3eaa3851e447d.js"></script><scriptdefersrc="../../static.files/main-c5bd66d33317d69f.js"></script><noscript><linkrel="stylesheet"href="../../static.files/noscript-5d8b3c7633ad77ba.css"></noscript><linkrel="alternate icon"type="image/png"href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><linkrel="alternate icon"type="image/png"href="../../static.files/favicon-32x32-422f7d1d52889060.png"><linkrel="icon"type="image/svg+xml"href="../../static.files/favicon-2c020d218678b618.svg"></head><bodyclass="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="logo-container"href="../../os/index.html"><imgclass="rust-logo"src="../../static.files/rust-logo-151179464ae7ed46.svg"alt="logo"></a></nav><navclass="sidebar"><aclass="logo-container"href="../../os/index.html"><imgclass="rust-logo"src="../../static.files/rust-logo-151179464ae7ed46.svg"alt="logo"></a><h2class="location"><ahref="#">Module trap</a></h2><divclass="sidebar-elems"><section><ulclass="block"><li><ahref="#modules">Modules</a></li><li><ahref="#structs">Structs</a></li><li><ahref="#functions">Functions</a></li></ul></section></div></nav><main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"title="help"tabindex="-1"><ahref="../../help.html">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Module <ahref="../index.html">os</a>::<wbr><aclass="mod"href="#">trap</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../../src/os/trap/mod.rs.html#1-140">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><detailsclass="toggle top-doc"open><summaryclass="hideme"><
to <ahref="../syscall/fn.syscall.html"title="fn os::syscall::syscall"><code>syscall()</code></a>.</p>
</div></details><h2id="modules"class="small-section-header"><ahref="#modules">Modules</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="mod"href="context/index.html"title="mod os::trap::context">context</a><spantitle="Restricted Visibility"> 🔒</span></div><divclass="desc docblock-short">Implementation of <ahref="context/struct.TrapContext.html"title="struct os::trap::context::TrapContext"><code>TrapContext</code></a></div></li></ul><h2id="structs"class="small-section-header"><ahref="#structs">Structs</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="struct"href="struct.TrapContext.html"title="struct os::trap::TrapContext">TrapContext</a></div><divclass="desc docblock-short">trap context structure containing sstatus, sepc and registers</div></li></ul><h2id="functions"class="small-section-header"><ahref="#functions">Functions</a></h2><ulclass="item-table"><li><divclass="item-name"><aclass="fn"href="fn.enable_timer_interrupt.html"title="fn os::trap::enable_timer_interrupt">enable_timer_interrupt</a></div><divclass="desc docblock-short">enable timer interrupt in sie CSR</div></li><li><divclass="item-name"><aclass="fn"href="fn.init.html"title="fn os::trap::init">init</a></div><divclass="desc docblock-short">initialize CSR <code>stvec</code> as the entry of <code>__alltraps</code></div></li><li><divclass="item-name"><aclass="fn"href="fn.set_kernel_trap_entry.html"title="fn os::trap::set_kernel_trap_entry">set_kernel_trap_entry</a><spantitle="Restricted Visibility"> 🔒</span></div></li><li><divclass="item-name"><aclass="fn"href="fn.set_user_trap_entry.html"title="fn os::trap::set_user_trap_entry">set_user_trap_entry</a><spantitle="Restricted Visibility"> 🔒</span></div></li><li><divclass="item-name"><aclass="fn"href="fn.trap_from_kernel.html"title="fn os::trap::trap_from_kernel">trap_from_kernel</a></div><divclass="desc docblock-short">Unimplement: traps/interrupts/exceptions from kernel mode
Todo: Chapter 9: I/O device</div></li><li><divclass="item-name"><aclass="fn"href="fn.trap_handler.html"title="fn os::trap::trap_handler">trap_handler</a></div><divclass="desc docblock-short">handle an interrupt, exception, or system call from user space</div></li><li><divclass="item-name"><aclass="fn"href="fn.trap_return.html"title="fn os::trap::trap_return">trap_return</a></div><divclass="desc docblock-short">set the new addr of __restore asm function in TRAMPOLINE page,
