mmap executable memory (#3201)

src/core/address_space.cpp

@@ -358,9 +358,17 @@ enum PosixPageProtection {
 [[nodiscard]] constexpr PosixPageProtection ToPosixProt(Core::MemoryProt prot) {
     if (True(prot & Core::MemoryProt::CpuReadWrite) ||
         True(prot & Core::MemoryProt::GpuReadWrite)) {
-        return PAGE_READWRITE;
+        if (True(prot & Core::MemoryProt::CpuExec)) {
+            return PAGE_EXECUTE_READWRITE;
+        } else {
+            return PAGE_READWRITE;
+        }
     } else if (True(prot & Core::MemoryProt::CpuRead) || True(prot & Core::MemoryProt::GpuRead)) {
-        return PAGE_READONLY;
+        if (True(prot & Core::MemoryProt::CpuExec)) {
+            return PAGE_EXECUTE_READ;
+        } else {
+            return PAGE_READONLY;
+        }
     } else {
         return PAGE_NOACCESS;
     }

src/core/libraries/kernel/memory.cpp

@@ -573,11 +573,12 @@ void* PS4_SYSV_ABI posix_mmap(void* addr, u64 len, s32 prot, s32 flags, s32 fd,
     auto* memory = Core::Memory::Instance();
     const auto mem_prot = static_cast<Core::MemoryProt>(prot);
     const auto mem_flags = static_cast<Core::MemoryMapFlags>(flags);
+    const auto is_exec = True(mem_prot & Core::MemoryProt::CpuExec);
 
     s32 result = ORBIS_OK;
     if (fd == -1) {
         result = memory->MapMemory(&addr_out, std::bit_cast<VAddr>(addr), len, mem_prot, mem_flags,
-                                   Core::VMAType::Flexible);
+                                   Core::VMAType::Flexible, "anon", is_exec);
     } else {
         result = memory->MapFile(&addr_out, std::bit_cast<VAddr>(addr), len, mem_prot, mem_flags,
                                  fd, phys_addr);

src/core/memory.cpp

@@ -631,6 +631,9 @@ s64 MemoryManager::ProtectBytes(VAddr addr, VirtualMemoryArea vma_base, u64 size
     if (True(prot & MemoryProt::CpuReadWrite)) {
         perms |= Core::MemoryPermission::ReadWrite;
     }
+    if (True(prot & MemoryProt::CpuExec)) {
+        perms |= Core::MemoryPermission::Execute;
+    }
     if (True(prot & MemoryProt::GpuRead)) {
         perms |= Core::MemoryPermission::Read;
     }
@@ -650,9 +653,9 @@ s32 MemoryManager::Protect(VAddr addr, u64 size, MemoryProt prot) {
     std::scoped_lock lk{mutex};
 
     // Validate protection flags
-    constexpr static MemoryProt valid_flags = MemoryProt::NoAccess | MemoryProt::CpuRead |
-                                              MemoryProt::CpuReadWrite | MemoryProt::GpuRead |
-                                              MemoryProt::GpuWrite | MemoryProt::GpuReadWrite;
+    constexpr static MemoryProt valid_flags =
+        MemoryProt::NoAccess | MemoryProt::CpuRead | MemoryProt::CpuReadWrite |
+        MemoryProt::CpuExec | MemoryProt::GpuRead | MemoryProt::GpuWrite | MemoryProt::GpuReadWrite;
 
     MemoryProt invalid_flags = prot & ~valid_flags;
     if (invalid_flags != MemoryProt::NoAccess) {

src/core/memory.h

@@ -31,6 +31,7 @@ enum class MemoryProt : u32 {
     NoAccess = 0,
     CpuRead = 1,
     CpuReadWrite = 2,
+    CpuExec = 4,
     GpuRead = 16,
     GpuWrite = 32,
     GpuReadWrite = 48,