Module metadata 

Reading of the rustc metadata for rlibs and dylibs

Re-exports

use std::borrow::Cow; 🔒

use std::fs::File; 🔒

use std::io::Write; 🔒

use std::path::Path; 🔒

use itertools::Itertools; 🔒

use object::write; 🔒

use object::write::StandardSegment; 🔒

use object::write::Symbol; 🔒

use object::write::SymbolSection; 🔒

use object::Architecture; 🔒

use object::BinaryFormat; 🔒

use object::Endianness; 🔒

use object::FileFlags; 🔒

use object::Object; 🔒

use object::ObjectSection; 🔒

use object::ObjectSymbol; 🔒

use object::SectionFlags; 🔒

use object::SectionKind; 🔒

use object::SymbolFlags; 🔒

use object::SymbolKind; 🔒

use object::SymbolScope; 🔒

use object::elf; 🔒

use object::pe; 🔒

use object::xcoff; 🔒

use rustc_abi::Endian; 🔒

use rustc_data_structures::memmap::Mmap; 🔒

use rustc_data_structures::owned_slice::OwnedSlice; 🔒

use rustc_data_structures::owned_slice::try_slice_owned; 🔒

use rustc_metadata::EncodedMetadata; 🔒

use rustc_metadata::creader::MetadataLoader; 🔒

use rustc_metadata::fs::METADATA_FILENAME; 🔒

use rustc_session::Session; 🔒

use rustc_span::bug; 🔒

use rustc_span::sym; 🔒

use rustc_target::spec::CfgAbi; 🔒

use rustc_target::spec::LlvmAbi; 🔒

use rustc_target::spec::Os; 🔒

use rustc_target::spec::RelocModel; 🔒

use rustc_target::spec::Target; 🔒

use rustc_target::spec::ef_avr_arch; 🔒

use tracing::debug; 🔒

use super::apple; 🔒

use crate::diagnostics; 🔒

Structs

DefaultMetadataLoader

The default metadata loader. This is used by cg_llvm and cg_clif.

Enums

MetadataPosition 🔒

Statics

AIX_METADATA_SYMBOL_NAME 🔒

Functions

add_gnu_property_note 🔒

create_compressed_metadata_file

create_compressed_metadata_file_for_xcoff

Xcoff - On AIX, custom sections are merged into predefined sections, so custom .rustc section is not preserved during linking. For this reason, we store metadata in predefined .info section, and define a symbol to reference the metadata. To preserve metadata during linking on AIX, we have toCreate an empty .text section, a empty .data section.Define an empty symbol named symbol_name inside .data section.Define an symbol named AIX_METADATA_SYMBOL_NAME referencing data inside .info section. From XCOFF’s view, (2) creates a csect entry in the symbol table, the symbol created by (3) is a info symbol for the preceding csect. Thus two symbols are preserved during linking and we can use the second symbol to reference the metadata.

create_metadata_file_for_wasm

Creates a simple WebAssembly object file, which is itself a wasm module, that contains a custom section of the name section_name with contents data.

create_object_file 🔒

create_wrapper_file 🔒

For rlibs we “pack” rustc metadata into a dummy object file.

elf_e_flags 🔒

elf_os_abi 🔒

get_metadata_xcoff 🔒

load_metadata_with 🔒

macho_is_arm64e 🔒

Is Apple’s CPU subtype arm64es

macho_object_build_version_for_target 🔒

Mach-O files contain information about:

search_for_section 🔒