diff --git a/docs/stack.md b/docs/stack.md
new file mode 100644
index 0000000..e69de29
diff --git a/examples/lib/libstring.asm b/examples/lib/libstring.asm
new file mode 100644
index 0000000..e69de29
diff --git a/fibs.asm b/fibs.asm
index 0782ce3..ca485dc 100644
--- a/fibs.asm
+++ b/fibs.asm
@@ -1,3 +1,4 @@
+        .stack 0xFFFF
         .data 0x200
 
 fibs:   .space 56
diff --git a/riscemu/Executable.py b/riscemu/Executable.py
index 0402aea..9597a6a 100644
--- a/riscemu/Executable.py
+++ b/riscemu/Executable.py
@@ -221,8 +221,9 @@ class LoadedMemorySection:
             print(FMT_BOLD + FMT_MAGENTA + "..." + FMT_NONE)
 
     def __repr__(self):
-        return "{} at 0x{:08X} (size={}bytes, flags={}, owner={})".format(
+        return "{}[{}] at 0x{:08X} (size={}bytes, flags={}, owner={})".format(
             self.__class__.__name__,
+            self.name,
             self.base,
             self.size,
             self.flags,
@@ -258,20 +259,6 @@ class LoadedExecutable:
         self.exported_symbols = dict()
         self.global_symbol_table = dict()
 
-        # stack/heap if wanted
-        if exe.stack_pref is not None:
-            self.sections.append(LoadedMemorySection(
-                'stack',
-                base_addr,
-                exe.stack_pref,
-                bytearray(exe.stack_pref),
-                MemoryFlags(read_only=False, executable=False),
-                self.name
-            ))
-            self.stack_heap = (self.base_addr, self.base_addr + exe.stack_pref)
-        else:
-            self.stack_heap = (0, 0)
-
         curr = base_addr
         for sec in exe.sections.values():
             loaded_sec = LoadedMemorySection(
@@ -286,6 +273,21 @@ class LoadedExecutable:
             self.sections_by_name[loaded_sec.name] = loaded_sec
             curr = align_addr(loaded_sec.size + curr)
 
+
+        # stack/heap if wanted
+        if exe.stack_pref is not None:
+            self.sections.append(LoadedMemorySection(
+                'stack',
+                curr,
+                exe.stack_pref,
+                bytearray(exe.stack_pref),
+                MemoryFlags(read_only=False, executable=False),
+                self.name
+            ))
+            self.stack_heap = (curr, curr + exe.stack_pref)
+        else:
+            self.stack_heap = (0, 0)
+
         for name, (sec_name, offset) in exe.symbols.items():
             if sec_name == '_static_':
                 self.symbols[name] = offset
diff --git a/riscemu/ExecutableParser.py b/riscemu/ExecutableParser.py
index eda87bf..f8a438f 100644
--- a/riscemu/ExecutableParser.py
+++ b/riscemu/ExecutableParser.py
@@ -98,7 +98,7 @@ class ExecutableParser:
 
     def op_stack(self, op: 'RiscVPseudoOpToken'):
         ASSERT_LEN(op.args, 1)
-        size = parse_numeric_argument(op.args)
+        size = parse_numeric_argument(op.args[0])
         self.stack_pref = size
 
     def op_global(self, op: 'RiscVPseudoOpToken'):