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remove a constant, add an assert

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Folkert 2022-09-18 00:32:55 +02:00
parent c7bb2672a9
commit 4f51f18a08
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1 changed files with 12 additions and 7 deletions
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19
crates/linker/src/generate_dylib/pe.rs
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@ -120,28 +120,31 @@ pub fn synthetic_dll(custom_names: &[String]) -> Vec<u8> {
let mut out_data = Vec::new();
let mut writer = object::write::pe::Writer::new(true, 8, 8, &mut out_data);
// fairly randomly chosen. Not sure if this is relevant
let virtual_address = 0x138;
let exports = synthetic_export_dir(virtual_address, custom_names);
// Reserve file ranges and virtual addresses.
writer.reserve_dos_header_and_stub();
// we will have one header: the export directory
writer.reserve_nt_headers(1);
writer.reserve_section_headers(1);
let virtual_address = writer.reserved_len();
let exports = synthetic_export_dir(virtual_address, custom_names);
writer.set_data_directory(
pe::IMAGE_DIRECTORY_ENTRY_EXPORT,
virtual_address,
exports.len() as _,
);
writer.reserve_section_headers(1);
// it's fine if this changes, this is just here to catch any accidental changes
debug_assert_eq!(virtual_address, 0x138);
// we store the export directory in a .rdata section
let rdata_section: (_, Vec<u8>) = {
let characteristics = 0x40000040;
// not sure if that 0x40 is important, I took it from a .dll that zig produced
let characteristics = object::pe::IMAGE_SCN_MEM_READ | 0x40;
let range = writer.reserve_section(
*b".rdata\0\0",
characteristics,
@ -151,6 +154,8 @@ pub fn synthetic_dll(custom_names: &[String]) -> Vec<u8> {
exports.len() as u32,
);
debug_assert_eq!(virtual_address, range.virtual_address);
(range.file_offset, exports)
};