<!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="The dyld cache header. Corresponds to struct dyld_cache_header from dyld_cache_format.h. This header has grown over time. Only the fields up to and including dyld_base_address are guaranteed to be present. For all other fields, check the header size before accessing the field. The header size is stored in mapping_offset; the mappings start right after the theader."><title>DyldCacheHeader in object::macho - 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/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../../static.files/rustdoc-ac92e1bbe349e143.css"><metaname="rustdoc-vars"data-root-path="../../"data-static-root-path="../../static.files/"data-current-crate="object"data-themes=""data-resource-suffix=""data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)"data-channel="1.76.0"data-search-js="search-2b6ce74ff89ae146.js"data-settings-js="settings-4313503d2e1961c2.js"><scriptsrc="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../static.files/main-305769736d49e732.js"></script><noscript><linkrel="stylesheet"href="../../static.files/noscript-feafe1bb7466e4bd.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 struct"><!--[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></nav><navclass="sidebar"><divclass="sidebar-crate"><h2><ahref="../../object/index.html">object</a><spanclass="version">0.32.2</span></h2></div><h2class="location"><ahref="#">DyldCacheHeader</a></h2><divclass="sidebar-elems"><section><h3><ahref="#fields">Fields</a></h3><ulclass="block structfield"><li><ahref="#structfield.dyld_base_address">dyld_base_address</a></li><li><ahref="#structfield.images_across_all_subcaches_count">images_across_all_subcaches_count</a></li><li><ahref="#structfield.images_across_all_subcaches_offset">images_across_all_subcaches_offset</a></li><li><ahref="#structfield.images_count">images_count</a></li><li><ahref="#structfield.images_offset">images_offset</a></li><li><ahref="#structfield.local_symbols_offset">local_symbols_offset</a></li><li><ahref="#structfield.local_symbols_size">local_symbols_size</a></li><li><ahref="#structfield.magic">magic</a></li><li><ahref="#structfield.mapping_count">mapping_count</a></li><li><ahref="#structfield.mapping_offset">mapping_offset</a></li><li><ahref="#structfield.subcaches_count">subcaches_count</a></li><li><ahref="#structfield.subcaches_offset">subcaches_offset</a></li><li><ahref="#structfield.symbols_subcache_uuid">symbols_subcache_uuid</a></li><li><ahref="#structfield.uuid">uuid</a></li></ul><h3><ahref="#implementations">Methods</a></h3><ulclass="block method"><li><ahref="#method.images">images</a></li><li><ahref="#method.mappings">mappings</a></li><li><ahref="#method.p
<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../../object/all.html"title="show sidebar"></a></div><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"tabindex="-1"><ahref="../../help.html"title="help">?</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>Struct <ahref="../index.html">object</a>::<wbr><ahref="index.html">macho</a>::<wbr><aclass="struct"href="#">DyldCacheHeader</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/object/macho.rs.html#295-348">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code><divclass="code-attribute">#[repr(C)]</div>pub struct DyldCacheHeader<E: <aclass="trait"href="../endian/trait.Endian.html"title="trait object::endian::Endian">Endian</a>> {<detailsclass="toggle type-contents-toggle"><summaryclass="hideme"><span>Show 14 fields</span></summary>
</div><spanid="structfield.mapping_offset"class="structfield section-header"><ahref="#structfield.mapping_offset"class="anchor field">§</a><code>mapping_offset: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>file offset to first dyld_cache_mapping_info</p>
</div><spanid="structfield.mapping_count"class="structfield section-header"><ahref="#structfield.mapping_count"class="anchor field">§</a><code>mapping_count: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>number of dyld_cache_mapping_info entries</p>
</div><spanid="structfield.images_offset"class="structfield section-header"><ahref="#structfield.images_offset"class="anchor field">§</a><code>images_offset: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>file offset to first dyld_cache_image_info</p>
</div><spanid="structfield.images_count"class="structfield section-header"><ahref="#structfield.images_count"class="anchor field">§</a><code>images_count: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>number of dyld_cache_image_info entries</p>
</div><spanid="structfield.dyld_base_address"class="structfield section-header"><ahref="#structfield.dyld_base_address"class="anchor field">§</a><code>dyld_base_address: <aclass="type"href="../endian/type.U64.html"title="type object::endian::U64">U64</a><E></code></span><divclass="docblock"><p>base address of dyld when cache was built</p>
</div><spanid="structfield.local_symbols_offset"class="structfield section-header"><ahref="#structfield.local_symbols_offset"class="anchor field">§</a><code>local_symbols_offset: <aclass="type"href="../endian/type.U64.html"title="type object::endian::U64">U64</a><E></code></span><divclass="docblock"><p>file offset of where local symbols are stored</p>
</div><spanid="structfield.local_symbols_size"class="structfield section-header"><ahref="#structfield.local_symbols_size"class="anchor field">§</a><code>local_symbols_size: <aclass="type"href="../endian/type.U64.html"title="type object::endian::U64">U64</a><E></code></span><divclass="docblock"><p>size of local symbols information</p>
</div><spanid="structfield.uuid"class="structfield section-header"><ahref="#structfield.uuid"class="anchor field">§</a><code>uuid: [<aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>; <aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.array.html">16</a>]</code></span><divclass="docblock"><p>unique value for each shared cache file</p>
</div><spanid="structfield.subcaches_offset"class="structfield section-header"><ahref="#structfield.subcaches_offset"class="anchor field">§</a><code>subcaches_offset: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>file offset to first dyld_subcache_info</p>
</div><spanid="structfield.subcaches_count"class="structfield section-header"><ahref="#structfield.subcaches_count"class="anchor field">§</a><code>subcaches_count: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>number of dyld_subcache_info entries</p>
</div><spanid="structfield.symbols_subcache_uuid"class="structfield section-header"><ahref="#structfield.symbols_subcache_uuid"class="anchor field">§</a><code>symbols_subcache_uuid: [<aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>; <aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.array.html">16</a>]</code></span><divclass="docblock"><p>the UUID of the .symbols subcache</p>
</div><spanid="structfield.images_across_all_subcaches_offset"class="structfield section-header"><ahref="#structfield.images_across_all_subcaches_offset"class="anchor field">§</a><code>images_across_all_subcaches_offset: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>file offset to first dyld_cache_image_info
Use this instead of images_offset if mapping_offset is at least 0x1c4.</p>
</div><spanid="structfield.images_across_all_subcaches_count"class="structfield section-header"><ahref="#structfield.images_across_all_subcaches_count"class="anchor field">§</a><code>images_across_all_subcaches_count: <aclass="type"href="../endian/type.U32.html"title="type object::endian::U32">U32</a><E></code></span><divclass="docblock"><p>number of dyld_cache_image_info entries
Use this instead of images_count if mapping_offset is at least 0x1c4.</p>
) -><aclass="type"href="../read/type.Result.html"title="type object::read::Result">Result</a><&'data [<aclass="struct"href="struct.DyldCacheMappingInfo.html"title="struct object::macho::DyldCacheMappingInfo">DyldCacheMappingInfo</a><E>]></h4></section></summary><divclass="docblock"><p>Return the mapping information table.</p>
) -><aclass="type"href="../read/type.Result.html"title="type object::read::Result">Result</a><<aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html"title="enum core::option::Option">Option</a><&'data [<aclass="struct"href="struct.DyldSubCacheInfo.html"title="struct object::macho::DyldSubCacheInfo">DyldSubCacheInfo</a><E>]>></h4></section></summary><divclass="docblock"><p>Return the information about subcaches, if present.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.symbols_subcache_uuid"class="method"><aclass="src rightside"href="../../src/object/read/macho/dyld_cache.rs.html#276-284">source</a><h4class="code-header">pub fn <ahref="#method.symbols_subcache_uuid"class="fn">symbols_subcache_uuid</a>(&self, endian: E) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html"title="enum core::option::Option">Option</a><[<aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>; <aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.array.html">16</a>]></h4></section></summary><divclass="docblock"><p>Return the UUID for the .symbols subcache, if present.</p>
) -><aclass="type"href="../read/type.Result.html"title="type object::read::Result">Result</a><&'data [<aclass="struct"href="struct.DyldCacheImageInfo.html"title="struct object::macho::DyldCacheImageInfo">DyldCacheImageInfo</a><E>]></h4></section></summary><divclass="docblock"><p>Return the image information table.</p>
<p>That is, this conversion is whatever the implementation of
<code><ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-ToOwned-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#83-85">source</a><ahref="#impl-ToOwned-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html"title="trait alloc::borrow::ToOwned">ToOwned</a> for T<divclass="where">where
T: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Owned"class="associatedtype trait-impl"><ahref="#associatedtype.Owned"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned"class="associatedtype">Owned</a> = T</h4></section></summary><divclass='docblock'>The resulting type after obtaining ownership.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_owned"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#88">source</a><ahref="#method.to_owned"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned"class="fn">to_owned</a>(&self) -> T</h4></section></summary><divclass='docblock'>Creates owned data from borrowed data, usually by cloning. <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.clone_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#92">source</a><ahref="#method.clone_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into"class="fn">clone_into</a>(&self, target: <aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&mut T</a>)</h4></section></summary><divclass='docblock'>Uses borrowed data to replace owned data, usually by cloning. <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><ahref="#impl-TryFrom%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl"><ahref="#associatedtype.Error"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><ahref="#method.try_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from"class="fn">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><ahref="#impl-TryInto%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl"><ahref="#associatedtype.Error-1"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><ahref="#method.try_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into"class="fn">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
