Struct wasmer_object::Object

pub struct Object<'a> {
    pub flags: FileFlags,
    pub mangling: Mangling,
    /* private fields */
}

A writable object file.

Fields

flags: FileFlags

File flags that are specific to each file format.

mangling: Mangling

The symbol name mangling scheme.

Implementations

impl<'a> Object<'a>

pub fn add_coff_exports(&mut self, style: CoffExportStyle)

Appends linker directives to the .drectve section to tell the linker to export all symbols with SymbolScope::Dynamic.

This must be called after all symbols have been defined.

impl<'a> Object<'a>

pub fn new( format: BinaryFormat, architecture: Architecture, endian: Endianness ) -> Object<'a>

Create an empty object file.

pub fn format(&self) -> BinaryFormat

Return the file format.

pub fn architecture(&self) -> Architecture

Return the architecture.

pub fn mangling(&self) -> Mangling

Return the current mangling setting.

pub fn set_mangling(&mut self, mangling: Mangling)

Specify the mangling setting.

pub fn segment_name(&self, segment: StandardSegment) -> &'static [u8]

Return the name for a standard segment.

This will vary based on the file format.

pub fn section(&self, section: SectionId) -> &Section<'a>

Get the section with the given SectionId.

pub fn section_mut(&mut self, section: SectionId) -> &mut Section<'a>

Mutably get the section with the given SectionId.

pub fn set_section_data<T>(&mut self, section: SectionId, data: T, align: u64)

where T: Into<Cow<'a, [u8]>>,

Set the data for an existing section.

Must not be called for sections that already have data, or that contain uninitialized data.

pub fn append_section_data( &mut self, section: SectionId, data: &[u8], align: u64 ) -> u64

Append data to an existing section. Returns the section offset of the data.

pub fn append_section_bss( &mut self, section: SectionId, size: u64, align: u64 ) -> u64

Append zero-initialized data to an existing section. Returns the section offset of the data.

pub fn section_id(&mut self, section: StandardSection) -> SectionId

Return the SectionId of a standard section.

If the section doesn’t already exist then it is created.

pub fn add_section( &mut self, segment: Vec<u8>, name: Vec<u8>, kind: SectionKind ) -> SectionId

Add a new section and return its SectionId.

This also creates a section symbol.

pub fn add_subsection( &mut self, section: StandardSection, name: &[u8], data: &[u8], align: u64 ) -> (SectionId, u64)

Add a subsection. Returns the SectionId and section offset of the data.

pub fn comdat(&self, comdat: ComdatId) -> &Comdat

Get the COMDAT section group with the given ComdatId.

pub fn comdat_mut(&mut self, comdat: ComdatId) -> &mut Comdat

Mutably get the COMDAT section group with the given ComdatId.

pub fn add_comdat(&mut self, comdat: Comdat) -> ComdatId

Add a new COMDAT section group and return its ComdatId.

pub fn symbol_id(&self, name: &[u8]) -> Option<SymbolId>

Get the SymbolId of the symbol with the given name.

pub fn symbol(&self, symbol: SymbolId) -> &Symbol

Get the symbol with the given SymbolId.

pub fn symbol_mut(&mut self, symbol: SymbolId) -> &mut Symbol

Mutably get the symbol with the given SymbolId.

pub fn add_symbol(&mut self, symbol: Symbol) -> SymbolId

Add a new symbol and return its SymbolId.

pub fn has_uninitialized_tls(&self) -> bool

Return true if the file format supports StandardSection::UninitializedTls.

pub fn has_common(&self) -> bool

Return true if the file format supports StandardSection::Common.

pub fn add_common_symbol( &mut self, symbol: Symbol, size: u64, align: u64 ) -> SymbolId

Add a new common symbol and return its SymbolId.

For Mach-O, this appends the symbol to the __common section.

pub fn add_file_symbol(&mut self, name: Vec<u8>) -> SymbolId

Add a new file symbol and return its SymbolId.

pub fn section_symbol(&mut self, section_id: SectionId) -> SymbolId

Get the symbol for a section.

pub fn add_symbol_data( &mut self, symbol_id: SymbolId, section: SectionId, data: &[u8], align: u64 ) -> u64

Append data to an existing section, and update a symbol to refer to it.

For Mach-O, this also creates a __thread_vars entry for TLS symbols, and the symbol will indirectly point to the added data via the __thread_vars entry.

Returns the section offset of the data.

pub fn add_symbol_bss( &mut self, symbol_id: SymbolId, section: SectionId, size: u64, align: u64 ) -> u64

Append zero-initialized data to an existing section, and update a symbol to refer to it.

For Mach-O, this also creates a __thread_vars entry for TLS symbols, and the symbol will indirectly point to the added data via the __thread_vars entry.

Returns the section offset of the data.

pub fn set_symbol_data( &mut self, symbol_id: SymbolId, section: SectionId, offset: u64, size: u64 )

Update a symbol to refer to the given data within a section.

For Mach-O, this also creates a __thread_vars entry for TLS symbols, and the symbol will indirectly point to the data via the __thread_vars entry.

pub fn symbol_section_and_offset( &mut self, symbol_id: SymbolId ) -> Option<(SymbolId, u64)>

Convert a symbol to a section symbol and offset.

Returns None if the symbol does not have a section.

pub fn add_relocation( &mut self, section: SectionId, relocation: Relocation ) -> Result<(), Error>

Add a relocation to a section.

Relocations must only be added after the referenced symbols have been added and defined (if applicable).

pub fn write(&self) -> Result<Vec<u8>, Error>

Write the object to a Vec.

pub fn write_stream<W>(&self, w: W) -> Result<(), Box<dyn Error>>

where W: Write,

Available on crate feature std only.

Write the object to a Write implementation.

Also flushes the writer.

It is advisable to use a buffered writer like BufWriter instead of an unbuffered writer like File.

pub fn emit(&self, buffer: &mut dyn WritableBuffer) -> Result<(), Error>

Write the object to a WritableBuffer.

Trait Implementations

impl<'a> Debug for Object<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.