change am

abstract-machine/am/src/riscv/npc/start.S

-# .section entry, "ax"
-# .globl _start
-# .type _start, @function
-
-# _start:
-#   mv s0, zero
-#   la sp, _stack_pointer
-#   call _trm_init
 .section entry, "ax"
-.global _start
+.globl _start
 .type _start, @function
 
 _start:
   mv s0, zero
-  # 初始化栈指针
   la sp, _stack_pointer
+  call _trm_init
+# .section entry, "ax"
+# .global _start
+# .type _start, @function
+
+# _start:
+#   mv s0, zero
+#   # 初始化栈指针
+#   la sp, _stack_pointer
 
-  # 调用 bootloader_copy_data()
-  call bootloader_copy_data
+#   # 调用 bootloader_copy_data()
+#   call bootloader_copy_data
 
-  # 调用 clear_bss()
-  call clear_bss
+#   # 调用 clear_bss()
+#   call clear_bss
 
-  # 调用主程序
-  call _trm_init
+#   # 调用主程序
+#   call _trm_init

abstract-machine/am/src/riscv/npc/trm.c

@@ -31,27 +31,27 @@ void _trm_init() {
   halt(ret);
 }
 
-extern char _data_lma[];
-extern char _data_lma_end[];
-extern char _data_start[];
-extern char _data_end[];
-
-void bootloader_copy_data() {
-    char *src = _data_lma;
-    char *dst = _data_start;
-    while (src < _data_lma_end) {
-        *dst++ = *src++;
-    }
-}
-extern char _bss_start[];
-extern char _bss_end[];
-
-
-void clear_bss() {
-	volatile char *dst = _bss_start;
-	while (dst < _bss_end) {
-	  *dst++ = 0;
-	}
-  }
+// extern char _data_lma[];
+// extern char _data_lma_end[];
+// extern char _data_start[];
+// extern char _data_end[];
+
+// void bootloader_copy_data() {
+//     char *src = _data_lma;
+//     char *dst = _data_start;
+//     while (src < _data_lma_end) {
+//         *dst++ = *src++;
+//     }
+// }
+// extern char _bss_start[];
+// extern char _bss_end[];
+
+
+// void clear_bss() {
+// 	volatile char *dst = _bss_start;
+// 	while (dst < _bss_end) {
+// 	  *dst++ = 0;
+// 	}
+//   }