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pass over COFF archive parser

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This commit is contained in:
Nikita Smith
2024-12-06 11:53:16 -08:00
parent 29de0c5a9e
commit 80fa226432
8 changed files with 455 additions and 335 deletions
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src/linker/lnk_lib.c
+16 -13
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@@ -109,25 +109,28 @@ lnk_lib_from_data(Arena *arena, String8 data, String8 path)
lnk_not_implemented("TODO: data is not archive");
}
COFF_ArchiveParse parse = coff_archive_parse_from_data(arena, data);
COFF_ArchiveParse parse = coff_archive_parse_from_data(data);
// report archive parser errors
if (parse.error.size) {
lnk_error(LNK_Error_IllData, "%S: %S", path, parse.error);
}
// try to init library from optional second member
if (parse.second_member.member_count) {
COFF_ArchiveSecondMember second_member = parse.second_member;
Assert(second_member.symbol_count == second_member.symbol_indices.size / sizeof(U16));
Assert(second_member.member_count == second_member.member_offsets.size / sizeof(U32));
Assert(second_member.symbol_count == second_member.symbol_index_count);
Assert(second_member.member_count == second_member.member_offset_count);
symbol_count = second_member.symbol_count;
string_table = second_member.string_table;
member_off_arr = push_array_no_zero(arena, U32, symbol_count);
// decompress member offsets
U32 *comp_off_arr = (U32*)second_member.member_offsets.str;
U16 *off_number_arr = (U16*)second_member.symbol_indices.str;
for (U64 symbol_idx = 0; symbol_idx < symbol_count; symbol_idx += 1) {
U16 off_number = off_number_arr[symbol_idx];
U16 off_number = second_member.symbol_indices[symbol_idx];
if (0 < off_number && off_number <= second_member.member_count) {
member_off_arr[symbol_idx] = comp_off_arr[off_number - 1];
member_off_arr[symbol_idx] = second_member.member_offsets[off_number - 1];
} else {
// TODO: log bad offset
member_off_arr[symbol_idx] = max_U32;
@@ -138,19 +141,19 @@ lnk_lib_from_data(Arena *arena, String8 data, String8 path)
// and lld-link with /DLL emits only first member
else if (parse.first_member.symbol_count) {
COFF_ArchiveFirstMember first_member = parse.first_member;
Assert(first_member.symbol_count == first_member.member_offsets.size / sizeof(U32));
Assert(first_member.symbol_count == first_member.member_offset_count);
symbol_count = first_member.symbol_count;
string_table = first_member.string_table;
member_off_arr = (U32*)first_member.member_offsets.str;
member_off_arr = first_member.member_offsets;
// convert big endian offsets
for (U32 offset_idx = 0; offset_idx < symbol_count; offset_idx += 1) {
member_off_arr[offset_idx] = BE_U32(member_off_arr[offset_idx]);
member_off_arr[offset_idx] = from_be_u32(member_off_arr[offset_idx]);
}
} else {
symbol_count = 0;
string_table = str8(0,0);
string_table = str8_zero();
member_off_arr = 0;
}
@@ -472,7 +475,7 @@ lnk_coff_archive_from_lib_build(Arena *arena, LNK_LibBuild *lib, B32 emit_second
// first linker member (obsolete, but kept for compatability reasons)
{
U32 symbol_count_be = BE_U32(symbol_count);
U32 symbol_count_be = from_be_u32(symbol_count);
U32 *member_off32_arr = push_array_no_zero(scratch.arena, U32, symbol_count);
for (U64 symbol_idx = 0; symbol_idx < symbol_count; symbol_idx += 1) {
@@ -480,7 +483,7 @@ lnk_coff_archive_from_lib_build(Arena *arena, LNK_LibBuild *lib, B32 emit_second
// write big endian member offset
U64 member_off = member_base_off + member_off_arr[symbol->member_idx];
U32 member_off32 = BE_U32(safe_cast_u32(member_off));
U32 member_off32 = from_be_u32(safe_cast_u32(member_off));
member_off32_arr[symbol_idx] = member_off32;
}