Add initial Linux support.

CMakeLists.txt

@@ -14,6 +14,7 @@ include_directories(third-party/imgui/backends)
 include_directories(third-party/sdl/)
 include_directories(third-party/fmt/include)
 include_directories(third-party/magic_enum/include)
+include_directories(third-party/zydis/include/Zydis)
 add_subdirectory("third-party")
 
 #=================== EXAMPLE ===================

README.md

@@ -1,13 +1,13 @@
 # shadPS4
 
-An early PS4 emulator for Windows
+An early PS4 emulator for Windows and Linux
 
 
 [Check us on twitter](https://twitter.com/shadps4 "Check us on twitter")
 
 # Status
 
-Currently it can only load PS4 ELF files . 
+Currently it can only load PS4 ELF files.
 
 ![](https://geps.dev/progress/60) Elf Loader
 
@@ -21,18 +21,38 @@ The project started as a fun project. Due to short amount of free time probably
 
 # Build
 
-Project is using cmake files. To build, Visual Studio 2022 is enough 
+## Windows
+
+The project is using cmake files. To build, just use Visual Studio 2022.
+
+## Linux
+
+Generate the build directory in the shadPS4 directory:
+```
+cmake -S . -B build/
+```
+
+Enter the directory:
+```
+cd build/
+```
+
+Use make to build the project:
+```
+make -j$(nproc)
+```
 
 |Platform|Build status|
 |--------|------------|
 |Windows build|[![Windows](https://github.com/georgemoralis/shadPS4/actions/workflows/windows.yml/badge.svg)](https://github.com/georgemoralis/shadPS4/actions/workflows/windows.yml)
+|Linux build| TODO
 
 
 To discuss this emulator please join our Discord server: [![Discord](https://img.shields.io/discord/1080089157554155590)](https://discord.gg/MyZRaBngxA)
 
 # Who are you?
 
-Old emulator fans and devs can recongnize me as "shadow" . I was the founder and coder for a lot of emulation projects 
+Old emulator fans and devs can recongnize me as "shadow". I was the founder and coder for a lot of emulation projects:
 * PCSX
 * PCSX2
 * PCSP
@@ -42,12 +62,12 @@ Old emulator fans and devs can recongnize me as "shadow" . I was the founder and
 
 # Contribution
 
-Currently I accept any kind of contribution some hints for what is might be useful.
+I currently accept any kind of contribution, here is a list of some items that may be useful:
 
-* PKG extractor (there was an initial work on this, just search project history commits)
+* PKG extractor (there was an initial work on this, just search project history commits).
 * Initial GUI with imgui, SDL3 and Vulkan.
-* Better logging system with spdlog
-* ..to be filled
+* Better logging system with spdlog.
+* to be filled...
 
 # Documentation
 

src/Core/FsFile.cpp

@@ -4,16 +4,23 @@ FsFile::FsFile()
 {
 	m_file = nullptr;
 }
+
 FsFile::FsFile(const std::string& path, fsOpenMode mode)
 {
 	Open(path, mode);
 }
+
 bool FsFile::Open(const std::string& path, fsOpenMode mode)
 {
 	Close();
+	#ifdef _WIN64
 		fopen_s(&m_file, path.c_str(), getOpenMode(mode));
+	#else
+		m_file = std::fopen(path.c_str(), getOpenMode(mode));
+	#endif
 	return IsOpen();
 }
+
 bool FsFile::Close()
 {
 	if (!IsOpen() || std::fclose(m_file) != 0) {
@@ -24,6 +31,7 @@ bool FsFile::Close()
 	m_file = nullptr;
 	return true;
 }
+
 FsFile::~FsFile()
 {
 	Close();
@@ -52,16 +60,26 @@ u32 FsFile::ReadBytes(void* dst, u64 size)
 
 bool FsFile::Seek(s64 offset, fsSeekMode mode)
 {
+	#ifdef _WIN64
 		if (!IsOpen() || _fseeki64(m_file, offset, getSeekMode(mode)) != 0) {
 			return false;
 		}
+	#else
+		if (!IsOpen() || fseeko64(m_file, offset, getSeekMode(mode)) != 0) {
+			return false;
+		}
+	#endif
 	return true;
 }
 
 u64 FsFile::Tell() const
 {
 	if (IsOpen()) {
+		#ifdef _WIN64
 			return _ftelli64(m_file);
+		#else
+			return ftello64(m_file);
+		#endif
 	}
 	else {
 		return -1;
@@ -69,6 +87,7 @@ u64 FsFile::Tell() const
 }
 u64 FsFile::getFileSize()
 {
+	#ifdef _WIN64
 		u64 pos = _ftelli64(m_file);
 		if (_fseeki64(m_file, 0, SEEK_END) != 0) {
 
@@ -80,6 +99,19 @@ u64 FsFile::getFileSize()
 
 			return 0;
 		}
+	#else
+		u64 pos = ftello64(m_file);
+		if (fseeko64(m_file, 0, SEEK_END) != 0) {
+
+			return 0;
+		}
+
+		u64 size = ftello64(m_file);
+		if (fseeko64(m_file, pos, SEEK_SET) != 0) {
+
+			return 0;
+		}
+	#endif
 	return size;
 }
 

src/Core/FsFile.h

@@ -1,7 +1,7 @@
 #pragma once
 #include <cstdio>
 #include <string>
-#include "../Types.h"
+#include "../types.h"
 
 enum fsOpenMode
 {
@@ -60,4 +60,3 @@ public:
 		return m_file;
 	}
 };
-

src/Core/Memory.cpp

@@ -1,5 +1,11 @@
 #include "../Core/PS4/Loader/Elf.h"
-#include <windows.h>
+
+#ifdef _WIN64
+	#include <windows.h>
+#else
+	#include <sys/mman.h>
+#endif
+
 #include "../Util/Log.h"
 
 namespace Memory
@@ -9,6 +15,7 @@ namespace Memory
 		u64 memory_alloc(u64 address, u64 size)
 		{
 			//TODO it supports only execute_read_write mode
+			#ifdef _WIN64
 				auto ptr = reinterpret_cast<uintptr_t>(VirtualAlloc(reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), 
 																    size,
 																	static_cast<DWORD>(MEM_COMMIT) | static_cast<DWORD>(MEM_RESERVE),
@@ -17,10 +24,22 @@ namespace Memory
 				if (ptr == 0)
 				{
 					auto err = static_cast<u32>(GetLastError());
-				LOG_ERROR_IF(true,"VirtualAlloc() failed: 0x{:X}\n", err);
+					LOG_ERROR_IF(true, "VirtualAlloc() failed: 0x{:X}\n", err);
 				}
+			#else
+				auto ptr = reinterpret_cast<uintptr_t>(mmap(reinterpret_cast<void *>(static_cast<uintptr_t>(address)),
+															size,
+															PROT_EXEC | PROT_READ | PROT_WRITE,
+															MAP_ANONYMOUS | MAP_PRIVATE,
+															-1,
+															0));
+
+				if (ptr == reinterpret_cast<uintptr_t>MAP_FAILED)
+				{
+					LOG_ERROR_IF(true, "mmap() failed: {}\n", std::strerror(errno));
+				}
+			#endif
 			return ptr;
 		}
 	}
-
 }

src/Core/PS4/Loader/Elf.cpp

@@ -7,6 +7,13 @@
 #include <fmt/core.h>
 #include "../../../Util/Log.h"
 
+#ifdef _WIN64
+    #define DBG_BREAKPOINT __debugbreak();
+#else
+    #include <signal.h>
+    #define DBG_BREAKPOINT raise(SIGTRAP);
+#endif
+
 constexpr bool debug_elf = true;
 
 template <>
@@ -29,7 +36,6 @@ static self_header* load_self(FsFile& f)
 	return self;
 }
 
-
 static self_segment_header* load_self_segments(FsFile& f, u16 num)
 {
     auto* segs = new self_segment_header[num];
@@ -39,7 +45,6 @@ static self_segment_header* load_self_segments(FsFile& f, u16 num)
     return segs;
 }
 
-
 static elf_header* load_elf_header(FsFile& f)
 {
     auto* m_elf_header = new elf_header;
@@ -95,6 +100,7 @@ void Elf::Reset()//reset all variables
     m_elf_shdr = nullptr;
     m_self_id_header = nullptr;
 }
+
 void Elf::Open(const std::string& file_name)
 {
     Reset();//reset all variables
@@ -151,7 +157,6 @@ void Elf::Open(const std::string& file_name)
         }
     }
 
-
     DebugDump();
 }
 
@@ -272,7 +277,9 @@ bool Elf::isElfFile() const
 void Elf::DebugDump() {
     std::vector<spdlog::sink_ptr> sinks;
     sinks.push_back(std::make_shared<spdlog::sinks::stdout_color_sink_mt>());
+    #ifdef _WIN64
         sinks.push_back(std::make_shared<spdlog::sinks::basic_file_sink_mt>(L"output.log", true)); //this might work only in windows ;/
+    #endif
     spdlog::set_default_logger(std::make_shared<spdlog::logger>("shadps4 logger", begin(sinks), end(sinks)));   
     auto f = std::make_unique<spdlog::pattern_formatter>("%v", spdlog::pattern_time_type::local, std::string(""));  // disable eol
     spdlog::set_formatter(std::move(f));
@@ -355,6 +362,7 @@ std::string Elf::SElfHeaderStr() {
      header+=             fmt::format("padding3 ...........: {:#010x}\n", m_self->padding3);
      return header;
 }
+
 std::string Elf::SELFSegHeader(u16 no)
 {
     auto segment_header = m_self_segments[no];
@@ -365,6 +373,7 @@ std::string Elf::SELFSegHeader(u16 no)
     header += fmt::format("memory size ......: {}\n", segment_header.memory_size);
     return header;
 }
+
 std::string Elf::ElfHeaderStr()
 {
     std::string header = fmt::format("======= Elf header ===========\n");
@@ -514,6 +523,7 @@ std::string Elf::ElfPHeaderStr(u16 no)
     header += fmt::format("p_align ...: {:#018x}\n", (m_elf_phdr + no)->p_align);
     return header;
 }
+
 void Elf::LoadSegment(u64 virtual_addr, u64 file_offset, u64 size)
 {
     if (m_self!=nullptr)
@@ -530,13 +540,13 @@ void Elf::LoadSegment(u64 virtual_addr, u64 file_offset, u64 size)
                 if (file_offset >= phdr.p_offset && file_offset < phdr.p_offset + phdr.p_filesz)
                 {
                     auto offset = file_offset - phdr.p_offset;
-                    m_f->Seek(offset + seg.file_offset,fsSeekMode::fsSeekSet);
+                    m_f->Seek(offset + seg.file_offset, fsSeekMode::fsSeekSet);
                     m_f->Read(reinterpret_cast<void*>(static_cast<uintptr_t>(virtual_addr)), size);
                     return;
                 }
             }
         }
-        __debugbreak();//hmm we didn't return something...
+        DBG_BREAKPOINT //hmm we didn't return something...
     }
     else
     {
@@ -545,6 +555,7 @@ void Elf::LoadSegment(u64 virtual_addr, u64 file_offset, u64 size)
         m_f->Read(reinterpret_cast<void*>(static_cast<uintptr_t>(virtual_addr)), size);
     }
 }
+
 u64 Elf::GetElfEntry()
 {
     return m_elf_header->e_entry;

src/Util/Disassembler.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "zydis/Zydis.h"
+#include "Zydis.h"
 #include "../types.h"
 
 class Disassembler