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wasm-linker: Fix debug info relocations

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This commit is contained in:
Luuk de Gram
2022-12-15 20:28:30 +01:00
parent f95549ddc7
commit ae106db889
1 changed files with 4 additions and 12 deletions
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16
src/link/Wasm/Atom.zig
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@@ -204,18 +204,10 @@ fn relocationValue(atom: Atom, relocation: types.Relocation, wasm_bin: *const Wa
return @intCast(u32, rel_value);
},
.R_WASM_FUNCTION_OFFSET_I32 => {
const target_atom = wasm_bin.symbol_atom.get(target_loc).?;
var current_atom = target_atom.getFirst();
var offset: u32 = 0;
// TODO: Calculate this during atom allocation, rather than
// this linear calculation. For now it's done here as atoms
// are being sorted after atom allocation, as functions aren't
// merged until later.
while (true) {
offset += 5; // each atom uses 5 bytes to store its body's size
if (current_atom == target_atom) break;
current_atom = current_atom.next.?;
}
const target_atom = wasm_bin.symbol_atom.get(target_loc) orelse {
return @bitCast(u32, @as(i32, -1));
};
const offset: u32 = 11 + Wasm.getULEB128Size(target_atom.size); // Header (11 bytes fixed-size) + body size (leb-encoded)
const rel_value = @intCast(i32, target_atom.offset + offset) + relocation.addend;
return @intCast(u32, rel_value);
},