kernel: Implement sceKernelSetVirtualRangeName (#338)

* Fix in searchFree should fix #337

* clang format fix

* sceKernelSetVirtualRangeName implementation

* improved vaddr conversion

* updated VirtualQuery to include name too

* unmap also removed name thanks @red_prig

* fixed copy...

src/core/libraries/kernel/libkernel.cpp

@@ -407,6 +407,7 @@ void LibKernel_Register(Core::Loader::SymbolsResolver* sym) {
 
     LIB_FUNCTION("2SKEx6bSq-4", "libkernel", 1, "libkernel", 1, 1, sceKernelBatchMap);
     LIB_FUNCTION("kBJzF8x4SyE", "libkernel", 1, "libkernel", 1, 1, sceKernelBatchMap2);
+    LIB_FUNCTION("DGMG3JshrZU", "libkernel", 1, "libkernel", 1, 1, sceKernelSetVirtualRangeName);
 
     // equeue
     LIB_FUNCTION("D0OdFMjp46I", "libkernel", 1, "libkernel", 1, 1, sceKernelCreateEqueue);

src/core/libraries/kernel/memory_management.cpp

@@ -274,4 +274,19 @@ s32 PS4_SYSV_ABI sceKernelBatchMap2(OrbisKernelBatchMapEntry* entries, int numEn
     return result;
 }
 
+s32 PS4_SYSV_ABI sceKernelSetVirtualRangeName(const void* addr, size_t len, const char* name) {
+    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;
+    }
+    auto* memory = Core::Memory::Instance();
+    memory->NameVirtualRange(std::bit_cast<VAddr>(addr), len, name);
+    return ORBIS_OK;
+}
 } // namespace Libraries::Kernel

src/core/libraries/kernel/memory_management.h

@@ -108,4 +108,6 @@ s32 PS4_SYSV_ABI sceKernelBatchMap(OrbisKernelBatchMapEntry* entries, int numEnt
 s32 PS4_SYSV_ABI sceKernelBatchMap2(OrbisKernelBatchMapEntry* entries, int numEntries,
                                     int* numEntriesOut, int flags);
 
+s32 PS4_SYSV_ABI sceKernelSetVirtualRangeName(const void* addr, size_t len, const char* name);
+
 } // namespace Libraries::Kernel

src/core/memory.cpp

@@ -188,7 +188,7 @@ int MemoryManager::MapFile(void** out_addr, VAddr virtual_addr, size_t size, Mem
 
     // Find first free area to map the file.
     if (False(flags & MemoryMapFlags::Fixed)) {
-        mapped_addr = SearchFree(mapped_addr, size_aligned);
+        mapped_addr = SearchFree(mapped_addr, size_aligned, 1);
     }
 
     if (True(flags & MemoryMapFlags::Fixed)) {
@@ -235,6 +235,7 @@ void MemoryManager::UnmapMemory(VAddr virtual_addr, size_t size) {
     vma.prot = MemoryProt::NoAccess;
     vma.phys_base = 0;
     vma.disallow_merge = false;
+    vma.name = "";
     MergeAdjacent(vma_map, new_it);
 
     // Unmap the memory region.
@@ -280,6 +281,7 @@ int MemoryManager::VirtualQuery(VAddr addr, int flags,
     info->is_flexible.Assign(vma.type == VMAType::Flexible);
     info->is_direct.Assign(vma.type == VMAType::Direct);
     info->is_commited.Assign(vma.type != VMAType::Free);
+    vma.name.copy(info->name.data(), std::min(info->name.size(), vma.name.size()));
     if (vma.type == VMAType::Direct) {
         const auto dmem_it = FindDmemArea(vma.phys_base);
         ASSERT(dmem_it != dmem_map.end());
@@ -338,6 +340,13 @@ std::pair<vk::Buffer, size_t> MemoryManager::GetVulkanBuffer(VAddr addr) {
     return std::make_pair(*it->second.buffer, addr - it->first);
 }
 
+void MemoryManager::NameVirtualRange(VAddr virtual_addr, size_t size, std::string_view name) {
+    auto it = FindVMA(virtual_addr);
+
+    ASSERT_MSG(it->second.Contains(virtual_addr, size),
+               "Range provided is not fully containted in vma");
+    it->second.name = name;
+}
 VAddr MemoryManager::SearchFree(VAddr virtual_addr, size_t size, u32 alignment) {
     auto it = FindVMA(virtual_addr);
     // If the VMA is free and contains the requested mapping we are done.

src/core/memory.h

@@ -177,6 +177,8 @@ public:
     int GetDirectMemoryType(PAddr addr, int* directMemoryTypeOut, void** directMemoryStartOut,
                             void** directMemoryEndOut);
 
+    void NameVirtualRange(VAddr virtual_addr, size_t size, std::string_view name);
+
 private:
     VMAHandle FindVMA(VAddr target) {
         return std::prev(vma_map.upper_bound(target));