From 6717482662b16a4ecb5ce317c4b2ab9a54a3bee4 Mon Sep 17 00:00:00 2001
From: georgemoralis <giorgosmrls@gmail.com>
Date: Tue, 4 Jul 2023 18:34:23 +0300
Subject: [PATCH] initial work on relocations

---
 src/Core/PS4/Linker.cpp   | 22 ++++++++++++++++++++++
 src/Core/PS4/Linker.h     |  1 +
 src/Core/PS4/Loader/Elf.h |  3 +++
 3 files changed, 26 insertions(+)

diff --git a/src/Core/PS4/Linker.cpp b/src/Core/PS4/Linker.cpp
index c0144d10..f3654a03 100644
--- a/src/Core/PS4/Linker.cpp
+++ b/src/Core/PS4/Linker.cpp
@@ -78,6 +78,7 @@ Module* Linker::LoadModule(const std::string& elf_name)
 		LoadModuleToMemory(m);
 		LoadDynamicInfo(m);
 		LoadSymbols(m);
+		Relocate(m);
 	}
 	else
 	{
@@ -495,4 +496,25 @@ void Linker::LoadSymbols(Module* m)
 			}
 		}
 	}
+}
+void Linker::Relocate(Module* m)
+{
+	u32 idx = 0;
+	for (auto* rel = m->dynamic_info->relocation_table; reinterpret_cast<u08*>(rel) < reinterpret_cast<u08*>(m->dynamic_info->relocation_table) + m->dynamic_info->relocation_table_size; rel++, idx++)
+	{
+		auto type = rel->GetType();
+		auto symbol = rel->GetSymbol();
+		auto addend = rel->rel_addend;
+
+		LOG_INFO_IF(debug_loader, "rel type {:#010x} rel symbol : {:#010x}\n", type, symbol);
+	}
+	idx = 0;
+	for (auto* rel = m->dynamic_info->jmp_relocation_table; reinterpret_cast<u08*>(rel) < reinterpret_cast<u08*>(m->dynamic_info->jmp_relocation_table) + m->dynamic_info->jmp_relocation_table_size; rel++, idx++)
+	{
+		auto type = rel->GetType();
+		auto symbol = rel->GetSymbol();
+		auto addend = rel->rel_addend;
+
+		LOG_INFO_IF(debug_loader, "jmprel type {:#010x} rel symbol : {:#010x}\n", type, symbol);
+	}
 }
\ No newline at end of file
diff --git a/src/Core/PS4/Linker.h b/src/Core/PS4/Linker.h
index bc7ce63b..4763bdf6 100644
--- a/src/Core/PS4/Linker.h
+++ b/src/Core/PS4/Linker.h
@@ -110,6 +110,7 @@ public:
 	void LoadDynamicInfo(Module* m);
 	void LoadSymbols(Module* m);
 	SymbolsResolver* getHLESymbols() { return m_HLEsymbols; }
+	void Relocate(Module* m);
 
 private:
 	const ModuleInfo* FindModule(const Module& m, const std::string& id);
diff --git a/src/Core/PS4/Loader/Elf.h b/src/Core/PS4/Loader/Elf.h
index 58d096fe..565f6d06 100644
--- a/src/Core/PS4/Loader/Elf.h
+++ b/src/Core/PS4/Loader/Elf.h
@@ -435,6 +435,9 @@ struct elf_symbol
 
 struct elf_relocation
 {
+    u32 GetSymbol() const { return static_cast<u32>(rel_info >> 32u); }
+    u32 GetType()   const { return static_cast<u32>(rel_info & 0xffffffff); }
+
     u64 rel_offset;
     u64 rel_info;
     s64 rel_addend;