From 46d3e1294631f278843b5b8ac736e67a5d9df3b5 Mon Sep 17 00:00:00 2001
From: Rui Ueyama <rui314@gmail.com>
Date: Tue, 5 Oct 2021 19:25:44 +0900
Subject: [PATCH] [Mach-O] wip

---
 macho/input-sections.cc | 10 +++++-----
 macho/mold.h            |  2 +-
 macho/object-file.cc    |  6 +++++-
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/macho/input-sections.cc b/macho/input-sections.cc
index fae4af7e..c3be4e19 100644
--- a/macho/input-sections.cc
+++ b/macho/input-sections.cc
@@ -26,11 +26,11 @@ Subsection *InputSection::find_subsection(Context &ctx, u32 addr) {
   return &*(it - 1);
 }
 
-static u64 read_addend(u8 *buf, u32 offset, u32 p2size) {
+static i64 read_addend(u8 *buf, u32 offset, u32 p2size) {
   switch (p2size) {
-  case 0: return buf[offset];
-  case 1: return *(u16 *)(buf + offset);
-  case 2: return *(u32 *)(buf + offset);
+  case 0: return *(i8 *)(buf + offset);
+  case 1: return *(i16 *)(buf + offset);
+  case 2: return *(i32 *)(buf + offset);
   case 3: return *(i64 *)(buf + offset);
   }
   unreachable();
@@ -42,7 +42,7 @@ void InputSection::parse_relocations(Context &ctx) {
   MachRel *rel = (MachRel *)(file.mf->data + hdr.reloff);
   for (i64 i = 0; i < hdr.nreloc; i++) {
     MachRel &r = rel[i];
-    u64 addend = read_addend((u8 *)contents.data(), r.offset, r.p2size);
+    i64 addend = read_addend((u8 *)contents.data(), r.offset, r.p2size);
 
     if (r.is_extern) {
       rels.push_back({r.offset, addend, file.syms[r.idx], nullptr});
diff --git a/macho/mold.h b/macho/mold.h
index 1c92fbb1..de2f1ccc 100644
--- a/macho/mold.h
+++ b/macho/mold.h
@@ -42,7 +42,7 @@ std::ostream &operator<<(std::ostream &out, const ObjectFile &file);
 
 struct Relocation {
   u32 offset = 0;
-  u64 addend = 0;
+  i64 addend = 0;
   Symbol *sym = nullptr;
   Subsection *subsec = nullptr;
 };
diff --git a/macho/object-file.cc b/macho/object-file.cc
index f612b17a..2c892057 100644
--- a/macho/object-file.cc
+++ b/macho/object-file.cc
@@ -54,8 +54,12 @@ void ObjectFile::parse(Context &ctx) {
     p += lc.cmdsize;
   }
 
-  for (std::unique_ptr<InputSection> &sec : sections)
+  for (std::unique_ptr<InputSection> &sec : sections) {
     sec->parse_relocations(ctx);
+    for (Relocation &rel : sec->rels)
+      SyncOut(ctx) << *sec << ": " << rel.offset << " " << rel.addend
+		   << " " << rel.sym << " " << rel.subsec;
+  }
 }
 
 } // namespace mold::macho