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coff: repurpose value field of import Symbol for lib_name offset

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This commit is contained in:
Jakub Konka 2023-03-27 20:45:32 +02:00
parent 0dc210f950
commit 2a5c4ea8f0
1 changed files with 12 additions and 2 deletions
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14
src/link/Coff.zig
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@ -64,6 +64,8 @@ globals_free_list: std.ArrayListUnmanaged(u32) = .{},
strtab: StringTable(.strtab) = .{},
strtab_offset: ?u32 = null,
temp_strtab: StringTable(.temp_strtab) = .{},
got_entries: std.ArrayListUnmanaged(Entry) = .{},
got_entries_free_list: std.ArrayListUnmanaged(u32) = .{},
got_entries_table: std.AutoHashMapUnmanaged(SymbolWithLoc, u32) = .{},
@ -309,6 +311,7 @@ pub fn deinit(self: *Coff) void {
self.locals_free_list.deinit(gpa);
self.globals_free_list.deinit(gpa);
self.strtab.deinit(gpa);
self.temp_strtab.deinit(gpa);
self.got_entries.deinit(gpa);
self.got_entries_free_list.deinit(gpa);
self.got_entries_table.deinit(gpa);
@ -358,6 +361,8 @@ fn populateMissingMetadata(self: *Coff) !void {
try self.strtab.buffer.ensureUnusedCapacity(gpa, @sizeOf(u32));
self.strtab.buffer.appendNTimesAssumeCapacity(0, @sizeOf(u32));
try self.temp_strtab.buffer.append(gpa, 0);
// Index 0 is always a null symbol.
try self.locals.append(gpa, .{
.name = [_]u8{0} ** 8,
@ -1526,8 +1531,7 @@ pub fn getDeclVAddr(self: *Coff, decl_index: Module.Decl.Index, reloc_info: link
return 0;
}
pub fn getGlobalSymbol(self: *Coff, name: []const u8, lib_name: ?[]const u8) !u32 {
_ = lib_name;
pub fn getGlobalSymbol(self: *Coff, name: []const u8, lib_name_name: ?[]const u8) !u32 {
const gop = try self.getOrPutGlobalPtr(name);
const global_index = self.getGlobalIndex(name).?;
@ -1544,6 +1548,12 @@ pub fn getGlobalSymbol(self: *Coff, name: []const u8, lib_name: ?[]const u8) !u3
try self.setSymbolName(sym, name);
sym.storage_class = .EXTERNAL;
if (lib_name_name) |lib_name| {
// We repurpose the 'value' of the Symbol struct to store an offset into
// temporary string table where we will store the library name hint.
sym.value = try self.temp_strtab.insert(gpa, lib_name);
}
try self.unresolved.putNoClobber(gpa, global_index, true);
return global_index;