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size in symbol header was incorrectly including alignment bytes

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This commit is contained in:
Nikita Smith
2026-04-16 16:42:22 -07:00
parent 15ff96f4a1
commit 9bf0f77391
1 changed files with 11 additions and 19 deletions
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src/linker/codeview_ext/codeview.c
+11 -19
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@@ -194,19 +194,13 @@ cv_precomp_info_from_leaf(CV_Leaf leaf)
internal U64
cv_write_symbol_buf(String8Node *buf, U64 *buf_pos, CV_Symbol *symbol, U64 align)
{
U64 record_size = 0;
record_size += sizeof(symbol->kind);
record_size += AlignPow2(symbol->data.size, align);
Assert(record_size <= CV_SymSize_Max);
CV_SymSize record_size16 = (CV_SymSize)record_size;
CV_SymbolHeader header = { .size = sizeof(CV_SymKind) + symbol->data.size, .kind = symbol->kind };
U64 pad_size = AlignPadPow2(header.size + sizeof(CV_SymSize), align);
U64 write_size = 0;
write_size += str8_buffer_write(buf, buf_pos, str8((U8 *)&(CV_SymbolHeader){ .size = record_size16, .kind = symbol->kind }, sizeof(CV_SymbolHeader)));
write_size += str8_buffer_write(buf, buf_pos, str8_struct(&header));
write_size += str8_buffer_write(buf, buf_pos, symbol->data);
write_size += str8_buffer_write_zeroes(buf, buf_pos, AlignPadPow2(symbol->data.size, align));
write_size += str8_buffer_write_zeroes(buf, buf_pos, pad_size);
Assert(write_size == header.size + sizeof(CV_SymSize) + pad_size);
return write_size;
}
@@ -248,7 +242,7 @@ cv_read_symbol(String8 raw_data, U64 off, U64 align, CV_Symbol *symbol_out)
symbol_out->kind = header.kind;
symbol_out->data = str8(symbol_ptr + sizeof(CV_SymbolHeader), header.size - sizeof(CV_SymKind));
U64 symbol_size = AlignPow2(sizeof(CV_SymbolHeader) + symbol_out->data.size, align);
U64 symbol_size = AlignPow2(sizeof(CV_SymSize) + header.size, align);
Assert(symbol_size <= raw_data.size);
return symbol_size;
}
@@ -1272,7 +1266,7 @@ cv_patch_symbol_tree_offsets(String8List raw_symbols, U64 base_offset, U64 align
for (;;) {
CV_SymbolHeader symbol_header;
if (str8_buffer_read(&buf, &buf_pos, sizeof(symbol_header), &symbol_header) != sizeof(symbol_header)) { break; }
if (str8_buffer_peek(&buf, &buf_pos, sizeof(symbol_header), &symbol_header) != sizeof(symbol_header)) { break; }
if (cv_is_scope_symbol(symbol_header.kind)) {
// NOTE: We don't patch 'next' offset in PROC symbols because
@@ -1283,7 +1277,7 @@ cv_patch_symbol_tree_offsets(String8List raw_symbols, U64 base_offset, U64 align
// patch parent symbol offset
if (stack) {
String8Node temp_buf = buf;
U64 temp_pos = buf_pos;
U64 temp_pos = buf_pos + sizeof(CV_SymbolHeader);
str8_buffer_write_u32(&temp_buf, &temp_pos, stack->offset);
}
@@ -1294,7 +1288,7 @@ cv_patch_symbol_tree_offsets(String8List raw_symbols, U64 base_offset, U64 align
// push frame to the stack
frame->symbol_buf = buf;
frame->symbol_pos = buf_pos;
frame->symbol_pos = buf_pos + sizeof(CV_SymbolHeader);
frame->offset = safe_cast_u32(symbol_offset);
SLLStackPush(stack, frame);
@@ -1316,10 +1310,8 @@ cv_patch_symbol_tree_offsets(String8List raw_symbols, U64 base_offset, U64 align
}
// advance symbol offset
symbol_offset += sizeof(CV_SymSize) + symbol_header.size;
symbol_offset = AlignPow2(symbol_offset, align);
str8_buffer_skip(&buf, &buf_pos, symbol_header.size - sizeof(CV_SymKind));
symbol_offset += AlignPow2(sizeof(CV_SymSize) + symbol_header.size, align);
str8_buffer_skip(&buf, &buf_pos, AlignPow2(symbol_header.size + sizeof(CV_SymSize), align));
}
scratch_end(scratch);