added stubbed mostly version of flexible memory - it allows sonic mania to go further

CMakeLists.txt

@@ -101,7 +101,11 @@ set(GNM_LIB src/core/libraries/gnmdriver/gnmdriver.cpp
             src/core/libraries/gnmdriver/gnmdriver.h
 )
 
-set(KERNEL_LIB src/core/libraries/kernel/cpu_management.cpp
+set(KERNEL_LIB src/core/libraries/kernel/memory/flexible_memory.cpp
+               src/core/libraries/kernel/memory/flexible_memory.h     
+               src/core/libraries/kernel/memory/kernel_memory.cpp
+               src/core/libraries/kernel/memory/kernel_memory.h
+               src/core/libraries/kernel/cpu_management.cpp
                src/core/libraries/kernel/cpu_management.h
                src/core/libraries/kernel/event_queue.cpp
                src/core/libraries/kernel/event_queue.h

src/core/libraries/kernel/libkernel.cpp

@@ -10,6 +10,7 @@
 #include "core/libraries/kernel/event_queues.h"
 #include "core/libraries/kernel/file_system.h"
 #include "core/libraries/kernel/libkernel.h"
+#include "core/libraries/kernel/memory/kernel_memory.h"
 #include "core/libraries/kernel/memory_management.h"
 #include "core/libraries/kernel/thread_management.h"
 #include "core/libraries/kernel/time_management.h"
@@ -180,6 +181,7 @@ void LibKernel_Register(Core::Loader::SymbolsResolver* sym) {
     Libraries::Kernel::fileSystemSymbolsRegister(sym);
     Libraries::Kernel::timeSymbolsRegister(sym);
     Libraries::Kernel::pthreadSymbolsRegister(sym);
+    Libraries::Kernel::RegisterKernelMemory(sym);
 
     // temp
     LIB_FUNCTION("NWtTN10cJzE", "libSceLibcInternalExt", 1, "libSceLibcInternal", 1, 1,

src/core/libraries/kernel/memory/flexible_memory.cpp

@@ -0,0 +1,22 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "flexible_memory.h"
+
+namespace Libraries::Kernel {
+bool FlexibleMemory::Map(u64 virtual_addr, std::size_t len, int prot,
+                         VirtualMemory::MemoryMode cpu_mode) {
+    std::scoped_lock lock{mutex};
+
+    AllocatedBlock block{};
+    block.map_virtual_addr = virtual_addr;
+    block.map_size = len;
+    block.prot = prot;
+    block.cpu_mode = cpu_mode;
+
+    allocated_blocks.push_back(block);
+    allocated_total += len;
+
+    return true;
+}
+} // namespace Libraries::Kernel

src/core/libraries/kernel/memory/flexible_memory.h

@@ -0,0 +1,33 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <mutex>
+#include <vector>
+#include "common/types.h"
+#include "core/virtual_memory.h"
+
+namespace Libraries::Kernel {
+
+class FlexibleMemory {
+public:
+    struct AllocatedBlock {
+        u64 map_virtual_addr;
+        u64 map_size;
+        int prot;
+        VirtualMemory::MemoryMode cpu_mode;
+    };
+
+    FlexibleMemory(){};
+    virtual ~FlexibleMemory(){};
+
+public:
+    bool Map(u64 virtual_addr, std::size_t len, int prot, VirtualMemory::MemoryMode cpu_mode);
+
+private:
+    std::vector<AllocatedBlock> allocated_blocks;
+    u64 allocated_total = 0;
+    std::mutex mutex;
+};
+} // namespace Libraries::Kernel

src/core/libraries/kernel/memory/kernel_memory.cpp

@@ -0,0 +1,78 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <common/assert.h>
+#include <common/singleton.h>
+#include <core/libraries/error_codes.h>
+#include <core/libraries/libs.h>
+#include <core/virtual_memory.h>
+#include "flexible_memory.h"
+#include "kernel_memory.h"
+
+namespace Libraries::Kernel {
+
+bool Is16KBMultiple(u64 n) {
+    return ((n % (16ull * 1024) == 0));
+}
+s32 PS4_SYSV_ABI sceKernelMapNamedFlexibleMemory(void** addr_in_out, std::size_t len, int prot,
+                                                 int flags, const char* name) {
+
+    LOG_INFO(Kernel_Vmm, "len = {:#x}, prot = {:#x}, flags = {:#x}, name = {}", len, prot, flags,
+             name);
+
+    if (len == 0 || !Is16KBMultiple(len)) {
+        LOG_ERROR(Kernel_Vmm, "len is 0 or not 16kb multiple");
+        return ORBIS_KERNEL_ERROR_EINVAL;
+    }
+
+    static constexpr size_t MaxNameSize = 32;
+    if (std::strlen(name) > MaxNameSize) {
+        LOG_ERROR(Kernel_Vmm, "name exceeds 32 bytes!");
+        return ORBIS_KERNEL_ERROR_ENAMETOOLONG;
+    }
+
+    if (name == nullptr) {
+        LOG_ERROR(Kernel_Vmm, "name is invalid!");
+        return ORBIS_KERNEL_ERROR_EFAULT;
+    }
+
+    VirtualMemory::MemoryMode cpu_mode = VirtualMemory::MemoryMode::NoAccess;
+
+    switch (prot) {
+    case 0x3:
+        cpu_mode = VirtualMemory::MemoryMode::ReadWrite;
+        break;
+    default:
+        UNREACHABLE();
+    }
+
+    auto in_addr = reinterpret_cast<u64>(*addr_in_out);
+    auto out_addr = VirtualMemory::memory_alloc(in_addr, len, cpu_mode);
+    *addr_in_out = reinterpret_cast<void*>(out_addr);
+
+    auto* flexible_memory = Common::Singleton<FlexibleMemory>::Instance();
+
+    if (!flexible_memory->Map(out_addr, len, prot, cpu_mode)) {
+        UNREACHABLE();
+    }
+
+    if (out_addr == 0) {
+        LOG_ERROR(Kernel_Vmm, "Can't allocate address");
+        return ORBIS_KERNEL_ERROR_ENOMEM;
+    }
+    LOG_INFO(Kernel_Vmm, "in_addr = {:#x} out_addr = {:#x}", in_addr, out_addr);
+
+    return ORBIS_OK;
+}
+
+s32 PS4_SYSV_ABI sceKernelMapFlexibleMemory(void** addr_in_out, std::size_t len, int prot,
+                                            int flags) {
+    return sceKernelMapNamedFlexibleMemory(addr_in_out, len, prot, flags, "");
+}
+
+void RegisterKernelMemory(Core::Loader::SymbolsResolver* sym) {
+    LIB_FUNCTION("mL8NDH86iQI", "libkernel", 1, "libkernel", 1, 1, sceKernelMapNamedFlexibleMemory);
+    LIB_FUNCTION("IWIBBdTHit4", "libkernel", 1, "libkernel", 1, 1, sceKernelMapFlexibleMemory);
+}
+
+} // namespace Libraries::Kernel

src/core/libraries/kernel/memory/kernel_memory.h

@@ -0,0 +1,18 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/types.h"
+
+namespace Core::Loader {
+class SymbolsResolver;
+}
+
+namespace Libraries::Kernel {
+s32 PS4_SYSV_ABI sceKernelMapNamedFlexibleMemory(void** addrInOut, std::size_t len, int prot,
+                                                 int flags, const char* name);
+s32 PS4_SYSV_ABI sceKernelMapFlexibleMemory(void** addr_in_out, std::size_t len, int prot,
+                                            int flags);
+void RegisterKernelMemory(Core::Loader::SymbolsResolver* sym);
+} // namespace Libraries::Kernel