fixed ascii escape sequences and section address calculation

riscemu/assembler.py

@@ -173,6 +173,9 @@ class AssemblerDirectives:
 
     @classmethod
     def add_text(cls, text: str, context: ParseContext, zero_terminate: bool = True):
+        # replace '\t' and '\n' escape sequences
+        text = text.replace('\\n', '\n').replace('\\t', '\t')
+
         encoded_bytes = bytearray(text.encode('ascii'))
         if zero_terminate:
             encoded_bytes += bytearray(1)

riscemu/types.py

@@ -65,7 +65,7 @@ class InstructionContext:
 
     global_symbol_dict: Dict[str, T_AbsoluteAddress]
     """
-    A reference to the MMU for access to global symbols
+    A reference to the MMU's global symbol dictionary for access to global symbols
     """
 
     def __init__(self):
@@ -264,7 +264,7 @@ class Program:
             return base + self.context.labels.get('main')
         for sec in self.sections:
             if get_section_base_name(sec.name) == '.text' and sec.flags.executable:
-                return base + sec.base
+                return sec.base
 
     def loaded_trigger(self, at_addr: T_AbsoluteAddress):
         """