From 6fcfe38e26f2d6ed185f421ba93bcd9d1e691281 Mon Sep 17 00:00:00 2001
From: georgemoralis <giorgosmrls@gmail.com>
Date: Sun, 11 Jun 2023 15:35:04 +0300
Subject: [PATCH] Added DT_OS_NEEDED_MODULE

---
 src/Core/PS4/Linker.cpp | 21 +++++++++++++++------
 src/Core/PS4/Linker.h   | 16 ++++++++++++++++
 src/Loader/Elf.h        |  1 +
 3 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/src/Core/PS4/Linker.cpp b/src/Core/PS4/Linker.cpp
index b25e8c4a..03bd89d6 100644
--- a/src/Core/PS4/Linker.cpp
+++ b/src/Core/PS4/Linker.cpp
@@ -163,6 +163,7 @@ void Linker::LoadModuleToMemory(Module* m)
 void Linker::LoadDynamicInfo(Module* m)
 {
 	m->dynamic_info = new DynamicModuleInfo;
+	std::vector<ModuleInfo> needed_modules;
 
 	for (const auto* dyn = static_cast<elf_dynamic*>(m->m_dynamic); dyn->d_tag != DT_NULL; dyn++)
 	{
@@ -221,22 +222,22 @@ void Linker::LoadDynamicInfo(Module* m)
 				LOG_WARN_IF(debug_loader, "DT_SCE_RELAENT is NOT 0x18 should check!");
 			}
 			break;
-		case DT_INIT_ARRAY:
+		case DT_INIT_ARRAY:// Address of the array of pointers to initialization functions 
 			m->dynamic_info->init_array_virtual_addr = dyn->d_un.d_ptr;
 			break;
-		case DT_FINI_ARRAY:
+		case DT_FINI_ARRAY: // Address of the array of pointers to termination functions
 			m->dynamic_info->fini_array_virtual_addr = dyn->d_un.d_ptr;
 			break;
-		case DT_INIT_ARRAYSZ:
+		case DT_INIT_ARRAYSZ://Size in bytes of the array of initialization functions
 			m->dynamic_info->init_array_size = dyn->d_un.d_val;
 			break;
-		case DT_FINI_ARRAYSZ:
+		case DT_FINI_ARRAYSZ://Size in bytes of the array of terminationfunctions
 			m->dynamic_info->fini_array_size = dyn->d_un.d_val;
 			break;
-		case DT_PREINIT_ARRAY:
+		case DT_PREINIT_ARRAY://Address of the array of pointers to pre - initialization functions
 			m->dynamic_info->preinit_array_virtual_addr = dyn->d_un.d_ptr;
 			break;
-		case DT_PREINIT_ARRAYSZ:
+		case DT_PREINIT_ARRAYSZ://Size in bytes of the array of pre - initialization functions
 			m->dynamic_info->preinit_array_size = dyn->d_un.d_val;
 			break;
 		case DT_SCE_SYMENT: //The size of symbol table entries
@@ -269,6 +270,14 @@ void Linker::LoadDynamicInfo(Module* m)
 				LOG_ERROR_IF(debug_loader, "DT_NEEDED str table is not loaded should check!");
 			}
 			break;
+		case DT_OS_NEEDED_MODULE:
+			{
+				ModuleInfo info{};
+				info.value = dyn->d_un.d_val;
+				info.name = m->dynamic_info->str_table + info.name_offset;
+				needed_modules.push_back(info);
+			}
+			break;
 		default:
 			LOG_INFO_IF(debug_loader, "unsupported dynamic tag ..........: {:#018x}\n", dyn->d_tag);
 		}
diff --git a/src/Core/PS4/Linker.h b/src/Core/PS4/Linker.h
index 76aa8aea..ac8c9e93 100644
--- a/src/Core/PS4/Linker.h
+++ b/src/Core/PS4/Linker.h
@@ -16,6 +16,22 @@ struct Module
 	DynamicModuleInfo* dynamic_info = nullptr;
 };
 
+struct ModuleInfo
+{
+	std::string name;
+	union
+	{
+		u64 value;
+		struct
+		{
+			u32 name_offset;
+			u08 version_minor;
+			u08 version_major;
+			u16 id;
+		};
+	};
+};
+
 struct DynamicModuleInfo
 {
 	void* hash_table = nullptr;
diff --git a/src/Loader/Elf.h b/src/Loader/Elf.h
index 97a92cf8..de7d61d5 100644
--- a/src/Loader/Elf.h
+++ b/src/Loader/Elf.h
@@ -338,6 +338,7 @@ constexpr s64 DT_FINI_ARRAYSZ    = 0x0000001c;
 constexpr s64 DT_FLAGS           = 0x0000001e;
 constexpr s64 DT_PREINIT_ARRAY   = 0x00000020;
 constexpr s64 DT_PREINIT_ARRAYSZ = 0x00000021;
+constexpr s64 DT_OS_NEEDED_MODULE= 0x6100000f;
 constexpr s64 DT_SCE_HASH        = 0x61000025;
 constexpr s64 DT_SCE_PLTGOT      = 0x61000027;
 constexpr s64 DT_SCE_JMPREL      = 0x61000029;