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Plan 9 linker: don't try to calculate the vaddr before we know it

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Previously, this worked on small codebases, but it is not correct.
Unconditionally emitting a reloc fixes it (and it might be more performant).
This commit is contained in:
Jacob G-W 2023-07-16 21:10:49 -04:00
parent b9aa1dcaf1
commit 4d711e8edd
1 changed files with 1 additions and 20 deletions
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21
src/link/Plan9.zig
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@ -1407,26 +1407,7 @@ pub fn getDeclVAddr(
// TODO handle other extern variables and functions
return undefined;
}
// we might already know the vaddr
if (decl.ty.zigTypeTag(mod) == .Fn) {
var start = self.bases.text;
var it_file = self.fn_decl_table.iterator();
while (it_file.next()) |fentry| {
var symidx_and_submap = fentry.value_ptr;
var submap_it = symidx_and_submap.functions.iterator();
while (submap_it.next()) |entry| {
if (entry.key_ptr.* == decl_index) return start;
start += entry.value_ptr.code.len;
}
}
} else {
var start = self.bases.data + self.got_len * if (!self.sixtyfour_bit) @as(u32, 4) else 8;
var it = self.data_decl_table.iterator();
while (it.next()) |kv| {
if (decl_index == kv.key_ptr.*) return start;
start += kv.value_ptr.len;
}
}
// otherwise, we just add a relocation
const atom_index = try self.seeDecl(decl_index);
// the parent_atom_index in this case is just the decl_index of the parent
try self.addReloc(reloc_info.parent_atom_index, .{