Merge pull request #8745 from merryhime/null-fastmem-arena

arm_dynarmic: Fix nullptr fastmem arenas

src/core/arm/dynarmic/arm_dynarmic_32.cpp

@@ -195,14 +195,16 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable*
     if (page_table) {
         config.page_table = reinterpret_cast<std::array<std::uint8_t*, NUM_PAGE_TABLE_ENTRIES>*>(
             page_table->pointers.data());
-        config.fastmem_pointer = page_table->fastmem_arena;
-    }
         config.absolute_offset_page_table = true;
         config.page_table_pointer_mask_bits = Common::PageTable::ATTRIBUTE_BITS;
         config.detect_misaligned_access_via_page_table = 16 | 32 | 64 | 128;
         config.only_detect_misalignment_via_page_table_on_page_boundary = true;
-    config.fastmem_exclusive_access = true;
+
+        config.fastmem_pointer = page_table->fastmem_arena;
+
+        config.fastmem_exclusive_access = config.fastmem_pointer != nullptr;
         config.recompile_on_exclusive_fastmem_failure = true;
+    }
 
     // Multi-process state
     config.processor_id = core_index;
@@ -254,6 +256,7 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable*
         }
         if (!Settings::values.cpuopt_fastmem) {
             config.fastmem_pointer = nullptr;
+            config.fastmem_exclusive_access = false;
         }
         if (!Settings::values.cpuopt_fastmem_exclusives) {
             config.fastmem_exclusive_access = false;

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -250,7 +250,7 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable*
         config.fastmem_address_space_bits = address_space_bits;
         config.silently_mirror_fastmem = false;
 
-        config.fastmem_exclusive_access = true;
+        config.fastmem_exclusive_access = config.fastmem_pointer != nullptr;
         config.recompile_on_exclusive_fastmem_failure = true;
     }
 
@@ -314,6 +314,7 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable*
         }
         if (!Settings::values.cpuopt_fastmem) {
             config.fastmem_pointer = nullptr;
+            config.fastmem_exclusive_access = false;
         }
         if (!Settings::values.cpuopt_fastmem_exclusives) {
             config.fastmem_exclusive_access = false;