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cleanup

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Folkert 2022-08-24 12:34:08 +02:00
parent 0a2ffc8ba4
commit 87988a301b
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2 changed files with 23 additions and 30 deletions
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47
crates/linker/src/generate_dylib.rs
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@ -1,31 +1,22 @@
use std::error::Error;
use object::elf::{self, SectionHeader64};
use object::read::elf::{FileHeader, ProgramHeader, SectionHeader, Sym};
use object::Endianness;
use object::write::elf::Writer;
use roc_error_macros::internal_error;
use target_lexicon::Triple;
// an empty shared library, that we build on top of
const DUMMY: &[u8] = include_bytes!("../dummy-elf64-x86-64.so");
const DUMMY_ELF64: &[u8] = include_bytes!("../dummy-elf64-x86-64.so");
// index of the dynamic section
const DYMAMIC_SECTION: usize = 4;
pub fn generate(custom_names: &[String]) -> Result<Vec<u8>, Box<dyn Error>> {
let kind = match object::FileKind::parse(DUMMY) {
Ok(file) => file,
Err(err) => {
internal_error!("Failed to parse file: {}", err);
}
};
match kind {
object::FileKind::Elf64 => copy_file(DUMMY, custom_names),
_ => {
internal_error!("Not an ELF file");
}
pub fn generate(target: &Triple, custom_names: &[String]) -> object::read::Result<Vec<u8>> {
match target.binary_format {
target_lexicon::BinaryFormat::Elf => create_dylib_elf64(DUMMY_ELF64, custom_names),
target_lexicon::BinaryFormat::Macho => todo!("macho dylib creation"),
target_lexicon::BinaryFormat::Coff => todo!("coff dylib creation"),
other => unimplemented!("dylib creation for {:?}", other),
}
}
@ -86,7 +77,7 @@ impl Sections {
let mut extra_offset: usize = 0;
let mut addresses = Addresses::default();
for (i, out_offset) in offsets.iter_mut().enumerate().take(5) {
for (i, out_offset) in offsets.iter_mut().enumerate() {
// symtab, strtab and shstrtab is ignored because they are not ALLOC
let in_section = match i {
0 => sections.hash,
@ -154,7 +145,7 @@ pub const fn round_up_to_alignment(width: usize, alignment: usize) -> usize {
}
}
fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn Error>> {
fn create_dylib_elf64(in_data: &[u8], custom_names: &[String]) -> object::read::Result<Vec<u8>> {
let in_elf: &elf::FileHeader64<Endianness> = elf::FileHeader64::parse(in_data)?;
let endian = in_elf.endian()?;
let in_segments = in_elf.program_headers(endian, in_data)?;
@ -308,14 +299,16 @@ fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn
writer.reserve_shstrtab();
writer.reserve_section_headers();
writer.write_file_header(&object::write::elf::FileHeader {
os_abi: in_elf.e_ident().os_abi,
abi_version: in_elf.e_ident().abi_version,
e_type: in_elf.e_type(endian),
e_machine: in_elf.e_machine(endian),
e_entry: in_elf.e_entry(endian),
e_flags: in_elf.e_flags(endian),
})?;
writer
.write_file_header(&object::write::elf::FileHeader {
os_abi: in_elf.e_ident().os_abi,
abi_version: in_elf.e_ident().abi_version,
e_type: in_elf.e_type(endian),
e_machine: in_elf.e_machine(endian),
e_entry: in_elf.e_entry(endian),
e_flags: in_elf.e_flags(endian),
})
.unwrap();
writer.write_align_program_headers();
for in_segment in in_segments {