support for loading multiple executables

riscemu/Tokenizer.py

@@ -13,6 +13,7 @@ PSEUDO_OPS = [
     '.double',
     '.extern',
     '.global',
+    '.stack',
     '.align',
     '.float',
     '.kdata',

riscemu/__main__.py

@@ -5,7 +5,8 @@ if __name__ == '__main__':
     import sys
 
     parser = argparse.ArgumentParser(description='RISC-V Userspace parser and emulator', prog='riscemu')
-    parser.add_argument('file', metavar='file.asm', type=str, help='The assembly file to interpret and run')
+    parser.add_argument('files', metavar='file.asm', type=str, nargs='+',
+                        help='The assembly files to load, the last one will be run')
 
     # RunConfig parameters
     parser.add_argument('--no-color', type=bool, help='no colored output', default=False,
@@ -35,7 +36,10 @@ if __name__ == '__main__':
         FMT_PRINT = ""
 
     try:
-        tk = RiscVTokenizer(RiscVInput.from_file(args.file))
+        cpu = CPU(cfg)
+        loaded_exe = None
+        for file in args.files:
+            tk = RiscVTokenizer(RiscVInput.from_file(file))
             tk.tokenize()
 
             if args.print_tokens:
@@ -43,14 +47,14 @@ if __name__ == '__main__':
                 for token in tk.tokens:
                     print(token)
 
-        executable = ExecutableParser(tk).parse()
+            loaded_exe = cpu.load(ExecutableParser(tk).parse())
+
+        # run the last loaded executable
+        cpu.run_loaded(loaded_exe)
     except RiscemuBaseException as e:
         print("Error while parsing: {}".format(e.message()))
         import traceback
         traceback.print_exception(type(e), e, e.__traceback__)
         sys.exit(1)
 
-    cpu = CPU(cfg)
-    le = cpu.load(executable)
-    cpu.run_loaded(le)