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more hardcoding

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Folkert 2022-08-23 15:29:55 +02:00
parent 0fb137cc93
commit d3db9a0fef
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1 changed files with 34 additions and 35 deletions
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69
crates/linker/src/generate_dylib.rs
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@ -1,8 +1,7 @@
use std::convert::TryInto;
use std::error::Error;
use object::elf::{self, SectionHeader64};
use object::read::elf::{Dyn, FileHeader, ProgramHeader, SectionHeader, Sym};
use object::read::elf::{FileHeader, ProgramHeader, SectionHeader, Sym};
use object::Endianness;
use object::write::elf::Writer;
@ -352,40 +351,40 @@ fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn
let gnu_hash_symbol_base = 1;
let gnu_hash_symbol_count = writer.dynamic_symbol_count() - gnu_hash_symbol_base;
// Assign symbol indices.
let mut num_local = 0;
let mut out_syms = Vec::with_capacity(in_syms.len());
// content of the symbol table
//
// Symbol table '.symtab' contains 8 entries:
// Num: Value Size Type Bind Vis Ndx Name
// 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
// 1: 0000000000000120 0 SECTION LOCAL DEFAULT UND
// 2: 0000000000000130 0 SECTION LOCAL DEFAULT 1
// 3: 0000000000000150 0 SECTION LOCAL DEFAULT 2
// 4: 0000000000000168 0 SECTION LOCAL DEFAULT 3
// 5: 0000000000001000 0 SECTION LOCAL DEFAULT 4
// 6: 0000000000001f30 0 SECTION LOCAL DEFAULT 5
// 7: 0000000000001f30 0 OBJECT LOCAL DEFAULT 5 _DYNAMIC
let symbol = |index, name| Symbol {
in_sym: index,
name,
};
let out_syms = [
symbol(1, None),
symbol(2, None),
symbol(3, None),
symbol(4, None),
symbol(5, None),
symbol(6, None),
symbol(7, Some(writer.add_string(b"_DYNAMIC"))),
];
// include the NULL symbol
let num_local = 1 + out_syms.len();
let mut out_syms_index = Vec::with_capacity(in_syms.len());
out_syms_index.push(Default::default());
for (i, in_sym) in in_syms.iter().enumerate().skip(1) {
let section = match in_syms.symbol_section(endian, in_sym, i)? {
Some(in_section) => {
// Skip symbols for sections we aren't copying.
match out_sections_index.get(in_section.0) {
None => continue,
Some(index) => {
if index.0 == 0 {
out_syms_index.push(Default::default());
continue;
} else {
Some(out_sections_index[in_section.0])
}
}
}
}
None => None,
};
out_syms_index.push(writer.reserve_symbol_index(section));
let name = if in_sym.st_name(endian) != 0 {
let s = in_syms.symbol_name(endian, in_sym)?;
Some(writer.add_string(s))
} else {
None
};
out_syms.push(Symbol { in_sym: i, name });
if in_sym.st_bind() == elf::STB_LOCAL {
num_local = writer.symbol_count();
}
for sym in out_syms.iter() {
out_syms_index.push(writer.reserve_symbol_index(Some(out_sections_index[sym.in_sym])));
}
// Start reserving file ranges.
@ -534,7 +533,7 @@ fn copy_file(in_data: &[u8], custom_names: &[String]) -> Result<Vec<u8>, Box<dyn
writer.write_dynamic_section_header(addresses.dynamic);
writer.write_symtab_section_header(num_local);
writer.write_symtab_section_header(num_local as _);
writer.write_strtab_section_header();
writer.write_shstrtab_section_header();