Add shared memory and DNS resolution support

Kconfig

@@ -224,5 +224,53 @@ config OCRE_NETWORKING
     default n
     help
         Enable networking support for containers.
-
+
+config OCRE_SHARED_HEAP
+    bool "Enable container shared heap support"
+    default n
+    help
+        Enable shared heap support for containers.
+
+config OCRE_SHARED_HEAP_BUF_SIZE
+    int "Shared heap buffer size in bytes"
+    default 65536
+    depends on OCRE_SHARED_HEAP
+    help
+      Size of the pre-allocated buffer for the shared heap.
+      This memory is shared between WebAssembly modules.
+
+choice OCRE_SHARED_HEAP_MODE
+    prompt "Shared heap mode"
+    depends on OCRE_SHARED_HEAP
+    default OCRE_SHARED_HEAP_BUF_VIRTUAL
+    help
+      Select the shared heap memory mode:
+      - Physical: Map physical hardware registers (e.g., GPIO) to WASM address space
+      - Virtual: Allocate shared heap from regular RAM
+
+config OCRE_SHARED_HEAP_BUF_PHYSICAL
+    bool "Physical (hardware register mapping)"
+    help
+      Enable physical memory mapping for hardware access.
+      Maps physical hardware registers (like GPIO at 0x42020000) to WASM address space.
+      Use this when containers need direct access to hardware peripherals.
+
+config OCRE_SHARED_HEAP_BUF_VIRTUAL
+    bool "Virtual (RAM allocation)"
+    help
+      Enable virtual shared heap allocated from regular RAM.
+      Use this for normal inter-module communication without
+      direct hardware access.
+
+endchoice
+
+config OCRE_SHARED_HEAP_BUF_ADDRESS
+    hex "Shared heap buffer address"
+    default 0x00
+    depends on OCRE_SHARED_HEAP
+    help
+      Shared heap buffer address.
+      - For physical mode: Physical address of hardware registers
+      - For virtual mode: Leave as 0x00 to auto-allocate from RAM
+
 endmenu

src/ocre/components/container_supervisor/cs_sm_impl.c

@@ -73,6 +73,14 @@ static size_t ocre_get_available_memory(void) {
 }
 #endif
 
+#ifdef CONFIG_OCRE_SHARED_HEAP
+// Shared heap for memory-mapped access
+wasm_shared_heap_t _shared_heap = NULL;
+#ifdef CONFIG_OCRE_SHARED_HEAP_BUF_VIRTUAL
+uint8 preallocated_buf[CONFIG_OCRE_SHARED_HEAP_BUF_SIZE];
+#endif
+#endif
+
 static bool validate_container_memory(ocre_container_t *container) {
 #ifdef CONFIG_OCRE_MEMORY_CHECK_ENABLED
     size_t requested_heap = container->ocre_container_data.heap_size;
@@ -266,6 +274,30 @@ ocre_container_runtime_status_t CS_runtime_init(ocre_cs_ctx *ctx, ocre_container
 #ifdef CONFIG_OCRE_CONTAINER_MESSAGING
     ocre_messaging_init();
 #endif
+#ifdef CONFIG_OCRE_SHARED_HEAP
+    SharedHeapInitArgs heap_init_args;
+    memset(&heap_init_args, 0, sizeof(heap_init_args));
+
+#ifdef CONFIG_OCRE_SHARED_HEAP_BUF_PHYSICAL
+    // Physical mode - map hardware register address
+    heap_init_args.pre_allocated_addr = (void *)CONFIG_OCRE_SHARED_HEAP_BUF_ADDRESS;
+    LOG_INF("Creating physical memory mapping at 0x%08X (hardware registers)", 
+            CONFIG_OCRE_SHARED_HEAP_BUF_ADDRESS);
+#elif CONFIG_OCRE_SHARED_HEAP_BUF_VIRTUAL
+    // Virtual mode - allocate from RAM
+    heap_init_args.pre_allocated_addr = preallocated_buf;
+    LOG_INF("Creating virtual shared heap in RAM, size=%d bytes", 
+            CONFIG_OCRE_SHARED_HEAP_BUF_SIZE);
+#endif
+    heap_init_args.size = CONFIG_OCRE_SHARED_HEAP_BUF_SIZE;
+    _shared_heap = wasm_runtime_create_shared_heap(&heap_init_args);
+
+    if (!_shared_heap) {
+        LOG_ERR("Create preallocated shared heap failed");
+        return RUNTIME_STATUS_ERROR;
+    }
+#endif
+
     storage_heap_init();
     return RUNTIME_STATUS_INITIALIZED;
 }
@@ -352,6 +384,15 @@ ocre_container_status_t CS_run_container(ocre_container_t *container) {
                 "0.0.0.0/0",
         };
         wasm_runtime_set_wasi_addr_pool(curr_container_arguments->module, addr_pool, ADDRESS_POOL_SIZE);
+        /**
+         * Configure which domain names a WebAssembly module is allowed to resolve via DNS lookups
+         * ns_lookup_pool: An array of domain name patterns (e.g., "example.com", "*.example.com", or "*" for any domain)
+         */
+
+        const char *ns_lookup_pool[] = {
+            "*"
+        };
+        wasm_runtime_set_wasi_ns_lookup_pool(curr_container_arguments->module, ns_lookup_pool, sizeof(ns_lookup_pool) / sizeof(ns_lookup_pool[0]));
     #endif
 
     #ifdef CONFIG_OCRE_CONTAINER_FILESYSTEM
@@ -387,8 +428,35 @@ ocre_container_status_t CS_run_container(ocre_container_t *container) {
         defined(CONFIG_OCRE_CONTAINER_MESSAGING)
         ocre_register_module(curr_container_arguments->module_inst);
 #endif
-    }
+#ifdef CONFIG_OCRE_SHARED_HEAP
+        LOG_INF("Attaching shared heap to container %d", curr_container_ID);
+        /* attach module instance to the shared heap */
+        if (!wasm_runtime_attach_shared_heap(curr_container_arguments->module_inst, _shared_heap)) {
+            LOG_ERR("Attach shared heap failed.");
+            return CONTAINER_STATUS_ERROR;
+        }
 
+#ifdef CONFIG_OCRE_SHARED_HEAP_BUF_PHYSICAL
+        // For physical mode, get the base address from the shared heap itself
+        // The WASM address space already knows about the physical mapping
+        uint32 shared_heap_base_addr = wasm_runtime_addr_native_to_app(
+            curr_container_arguments->module_inst,
+            (void*)CONFIG_OCRE_SHARED_HEAP_BUF_ADDRESS);
+        LOG_INF("Physical shared heap base address in app: 0x%x", shared_heap_base_addr);
+#elif CONFIG_OCRE_SHARED_HEAP_BUF_VIRTUAL
+        // For virtual mode, convert the allocated buffer address
+        uint32 shared_heap_base_addr = wasm_runtime_addr_native_to_app(
+            curr_container_arguments->module_inst, 
+            preallocated_buf);
+        LOG_INF("Virtual shared heap base address in app: 0x%x", shared_heap_base_addr);
+#endif
+
+        if (shared_heap_base_addr == 0) {
+            LOG_ERR("Failed to get shared heap WASM address!");
+            return CONTAINER_STATUS_ERROR;
+        }
+#endif
+    }
     core_mutex_lock(&container_mutex);
     int thread_idx = get_available_thread();
     if (thread_idx == -1) {

src/shared/platform/posix/ocre_internal.cmake

@@ -43,6 +43,7 @@ set (WAMR_BUILD_LIBC_WASI 1)
 set (WAMR_BUILD_LIB_PTHREAD 1)
 set (WAMR_BUILD_REF_TYPES 1)
 set (WASM_ENABLE_LOG 1)
+set (WAMR_BUILD_SHARED_HEAP 1)
 
 if (NOT DEFINED WAMR_BUILD_GLOBAL_HEAP_POOL)
     set (WAMR_BUILD_GLOBAL_HEAP_POOL 1)

src/shared/platform/zephyr/ocre_internal.cmake

@@ -40,6 +40,7 @@ set(WAMR_BUILD_LIBC_WASI 1)
 set(WAMR_BUILD_LIB_PTHREAD 1)
 set(WAMR_BUILD_REF_TYPES 1)
 set(WASM_ENABLE_LOG 1)
+set (WAMR_BUILD_SHARED_HEAP 1)
 
 if(NOT DEFINED WAMR_BUILD_GLOBAL_HEAP_POOL)
     set(WAMR_BUILD_GLOBAL_HEAP_POOL 1)