baremetal: add baremetal platform

CMakeLists.txt

@@ -150,7 +150,7 @@ endif ()
 include (${SHARED_DIR}/utils/uncommon/shared_uncommon.cmake)
 
 set (THREADS_PREFER_PTHREAD_FLAG ON)
-find_package(Threads REQUIRED)
+# find_package(Threads REQUIRED)
 
 add_library (vmlib ${WAMR_RUNTIME_LIB_SOURCE})
 set_target_properties (vmlib PROPERTIES OUTPUT_NAME iwasm)

core/shared/platform/baremetal/platform_init.c

@@ -0,0 +1,24 @@
+#include "platform_api_vmcore.h"
+
+int
+bh_platform_init()
+{
+    return 0;
+}
+
+void
+bh_platform_destroy()
+{
+}
+
+int
+os_printf(const char *format, ...)
+{
+    return 0;
+}
+
+int
+os_vprintf(const char *format, va_list ap)
+{
+    return 0;
+}

core/shared/platform/baremetal/platform_internal.h

@@ -0,0 +1,49 @@
+#ifndef _PLATFORM_INTERNAL_H
+#define _PLATFORM_INTERNAL_H
+
+// #include <inttypes.h>
+// #include <stdbool.h>
+// #include <assert.h>
+// #include <time.h>
+// #include <string.h>
+// #include <stdio.h>
+// #include <stdlib.h>
+// #include <math.h>
+// #include <stdarg.h>
+// #include <ctype.h>
+// #include <pthread.h>
+// #include <signal.h>
+// #include <semaphore.h>
+// #include <limits.h>
+// #include <dirent.h>
+// #include <fcntl.h>
+// #include <unistd.h>
+// #include <poll.h>
+// #include <sched.h>
+// #include <errno.h>
+// #include <sys/types.h>
+// #include <sys/stat.h>
+// #include <sys/mman.h>
+// #include <sys/time.h>
+// #include <sys/timeb.h>
+// #include <sys/uio.h>
+// #include <sys/ioctl.h>
+// #include <sys/socket.h>
+// #include <sys/resource.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef BH_PLATFORM_BAREMETAL
+#define BH_PLATFORM_BAREMETAL
+#endif
+
+#define BH_APPLET_PRESERVED_STACK_SIZE (8 * 1024)
+#define BH_THREAD_DEFAULT_PRIORITY 0
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of _PLATFORM_INTERNAL_H */

core/shared/platform/baremetal/shared_platform.cmake

@@ -0,0 +1,12 @@
+set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
+
+add_definitions(-DBH_PLATFORM_BAREMETAL)
+
+include_directories(${PLATFORM_SHARED_DIR})
+include_directories(${PLATFORM_SHARED_DIR}/../include)
+
+file (GLOB_RECURSE source_all ${PLATFORM_SHARED_DIR}/*.c)
+set (PLATFORM_SHARED_SOURCE ${source_all})
+
+file (GLOB header ${PLATFORM_SHARED_DIR}/../include/baremetal/*.h)
+LIST (APPEND RUNTIME_LIB_HEADER_LIST ${header})