[dynarmic, jit] add address mapping checks for jit service

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -224,7 +224,7 @@ void ArmDynarmic64::MakeJit(Common::PageTable* page_table, std::size_t address_s
         config.only_detect_misalignment_via_page_table_on_page_boundary = true;
 
         config.fastmem_pointer = page_table->fastmem_arena ?
-            std::optional<uintptr_t>{reinterpret_cast<uintptr_t>(page_table->fastmem_arena)} :
+            std::optional<uintptr_t>{uintptr_t(page_table->fastmem_arena)} :
             std::nullopt;
         config.fastmem_address_space_bits = std::uint32_t(address_space_bits);
         config.silently_mirror_fastmem = false;

src/core/hle/service/jit/jit_context.cpp

@@ -60,6 +60,8 @@ public:
     {}
 
     std::optional<std::uint32_t> MemoryReadCode(VAddr vaddr) override {
+        if (!memory.IsValidVirtualAddressRange(vaddr, sizeof(u32)))
+            return std::nullopt;
         static_assert(Core::Memory::YUZU_PAGESIZE == Dynarmic::CODE_PAGE_SIZE);
         auto const aligned_vaddr = vaddr & ~Core::Memory::YUZU_PAGEMASK;
         if (last_code_addr != aligned_vaddr) {