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fake it well enough that cli tests all pass

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Folkert 2022-08-21 15:19:39 +02:00
parent 08e4abbf0a
commit 729e556534
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1 changed files with 45 additions and 12 deletions
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57
crates/linker/src/generate_dylib.rs
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@ -91,6 +91,20 @@ impl Sections {
}
}
pub const fn round_up_to_alignment(width: usize, alignment: usize) -> usize {
match alignment {
0 => width,
1 => width,
_ => {
if width % alignment > 0 {
width + alignment - (width % alignment)
} else {
width
}
}
}
}
fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn Error>> {
let in_elf: &elf::FileHeader64<Endianness> = elf::FileHeader64::parse(in_data)?;
let endian = in_elf.endian()?;
@ -371,7 +385,7 @@ fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn
// let hash = in_hash.as_ref().unwrap();
// writer.reserve_hash(hash.bucket_count.get(endian), hash_chain_count);
let reserved_before = writer.reserved_len();
writer.reserve_hash(3, 13);
writer.reserve_hash(3, hash_chain_count);
let reserved_after = writer.reserved_len();
extra_offset += {
@ -455,7 +469,7 @@ fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn
// elf::SHT_DYNAMIC
let in_section = &sections.dynamic.section;
let offset = in_section.sh_offset(endian) as usize + extra_offset;
offsets[5] = offset + 6; // seems like this needs to be aligned?!
offsets[5] = round_up_to_alignment(offset, 8); // seems like this needs to be aligned?!
writer.reserve_until(offset);
let dynamic_addr = in_section.sh_addr(endian);
@ -497,16 +511,35 @@ fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn
writer.write_align_program_headers();
for in_segment in in_segments {
writer.write_program_header(&object::write::elf::ProgramHeader {
p_type: in_segment.p_type(endian),
p_flags: in_segment.p_flags(endian),
p_offset: in_segment.p_offset(endian),
p_vaddr: in_segment.p_vaddr(endian),
p_paddr: in_segment.p_paddr(endian),
p_filesz: in_segment.p_filesz(endian),
p_memsz: in_segment.p_memsz(endian),
p_align: in_segment.p_align(endian),
});
if in_segment.p_type(endian) == elf::PT_DYNAMIC {
writer.write_program_header(&object::write::elf::ProgramHeader {
p_type: in_segment.p_type(endian),
p_flags: in_segment.p_flags(endian),
// dirty hack really. Not sure if this is correct on its own
p_offset: offsets[5] as _,
p_vaddr: in_segment.p_vaddr(endian),
p_paddr: in_segment.p_paddr(endian),
p_filesz: in_segment.p_filesz(endian),
p_memsz: in_segment.p_memsz(endian),
p_align: in_segment.p_align(endian),
});
} else {
writer.write_program_header(&object::write::elf::ProgramHeader {
p_type: in_segment.p_type(endian),
p_flags: in_segment.p_flags(endian),
// dirty hack really. Not sure if this is correct on its own
p_offset: if in_segment.p_offset(endian) > 0 {
offsets[5] as _
} else {
0
},
p_vaddr: in_segment.p_vaddr(endian),
p_paddr: in_segment.p_paddr(endian),
p_filesz: in_segment.p_filesz(endian),
p_memsz: in_segment.p_memsz(endian),
p_align: in_segment.p_align(endian),
});
}
}
for (i, in_section) in alloc_sections.iter() {