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| author | johannst <johannst@users.noreply.github.com> | 2023-02-27 22:52:40 +0000 |
|---|---|---|
| committer | johannst <johannst@users.noreply.github.com> | 2023-02-27 22:52:40 +0000 |
| commit | 872cf6d06f4d77637b4627fdc583bab79ee2372f (patch) | |
| tree | 07022610d914be3813d283577a71a18f26b81d64 /src/juicebox_asm/rt.rs.html | |
| download | juicebox-asm-872cf6d06f4d77637b4627fdc583bab79ee2372f.tar.gz juicebox-asm-872cf6d06f4d77637b4627fdc583bab79ee2372f.zip | |
deploy: 6486b862edc2750dba83848f62d6c9f3d4c6d3c2
Diffstat (limited to 'src/juicebox_asm/rt.rs.html')
| -rw-r--r-- | src/juicebox_asm/rt.rs.html | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/juicebox_asm/rt.rs.html b/src/juicebox_asm/rt.rs.html new file mode 100644 index 0000000..a44e465 --- /dev/null +++ b/src/juicebox_asm/rt.rs.html @@ -0,0 +1,104 @@ +<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/rt.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>rt.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-1f7d512b176f0f72.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin 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aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-5ec35bf9ca753509.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><a href="#1" id="1">1</a> +<a href="#2" id="2">2</a> +<a href="#3" id="3">3</a> +<a href="#4" id="4">4</a> +<a href="#5" id="5">5</a> +<a href="#6" id="6">6</a> +<a href="#7" id="7">7</a> +<a href="#8" id="8">8</a> +<a href="#9" id="9">9</a> +<a href="#10" id="10">10</a> +<a href="#11" id="11">11</a> +<a href="#12" id="12">12</a> +<a href="#13" id="13">13</a> +<a href="#14" id="14">14</a> +<a href="#15" id="15">15</a> +<a href="#16" 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id="49">49</a> +<a href="#50" id="50">50</a> +<a href="#51" id="51">51</a> +</pre><pre class="rust"><code><span class="kw">use </span>core::ffi::c_void; +<span class="kw">use </span>nix::sys::mman::{mmap, munmap, MapFlags, ProtFlags}; + +<span class="doccomment">/// A simple `mmap`ed runtime with executable pages. +</span><span class="kw">pub struct </span>Runtime { + buf: <span class="kw-2">*mut </span>c_void, + len: usize, +} + +<span class="kw">impl </span>Runtime { + <span class="doccomment">/// Create a new [Runtime]. + </span><span class="kw">pub fn </span>new(code: <span class="kw-2">&</span>[u8]) -> Runtime { + <span class="comment">// Allocate a single page. + </span><span class="kw">let </span>len = core::num::NonZeroUsize::new(<span class="number">4096</span>).unwrap(); + <span class="kw">let </span>buf = <span class="kw">unsafe </span>{ + mmap( + <span class="prelude-val">None</span>, + len, + ProtFlags::PROT_WRITE | ProtFlags::PROT_READ | ProtFlags::PROT_EXEC, + MapFlags::MAP_PRIVATE | MapFlags::MAP_ANONYMOUS, + <span class="number">0</span>, <span class="comment">/* fd */ + </span><span class="number">0</span>, <span class="comment">/* off */ + </span>) + .unwrap() + }; + { + <span class="comment">// Copy over code. + </span><span class="macro">assert!</span>(code.len() < len.get()); + <span class="kw">unsafe </span>{ std::ptr::copy_nonoverlapping(code.as_ptr(), buf.cast(), len.get()) }; + } + + Runtime { + buf, + len: len.get(), + } + } + + <span class="doccomment">/// Reinterpret the block of code as `F`. + </span><span class="attr">#[inline] + </span><span class="kw">pub unsafe fn </span>as_fn<F>(<span class="kw-2">&</span><span class="self">self</span>) -> F { + <span class="kw">unsafe </span>{ std::mem::transmute_copy(<span class="kw-2">&</span><span class="self">self</span>.buf) } + } +} + +<span class="kw">impl </span>Drop <span class="kw">for </span>Runtime { + <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { + <span class="kw">unsafe </span>{ + munmap(<span class="self">self</span>.buf, <span class="self">self</span>.len).expect(<span class="string">"Failed to munmap Runtime"</span>); + } + } +} +</code></pre></div> +</section></div></main><div id="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="juicebox_asm" data-themes="" data-resource-suffix="" data-rustdoc-version="1.67.1 (d5a82bbd2 2023-02-07)" data-search-js="search-444266647c4dba98.js" data-settings-js="settings-bebeae96e00e4617.js" data-settings-css="settings-af96d9e2fc13e081.css" ></div></body></html>
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