Some setup for working on labels that do not lie within the code segm…

…ent.

redox-core/src/compiling/executable.rs

@@ -2,6 +2,8 @@
 // [CODE]
 // [DATA]
 // [READ-ONLY DATA]
+// The data will also be loaded into memory in the same configuration,
+// though different segments will have slightly different permissions.
 
 pub struct Executable {}
 

redox-core/src/compiling/labels.rs

@@ -0,0 +1,16 @@
+#[derive(Debug, Eq, PartialEq)]
+pub enum LabelType {
+    Code,
+    Data,
+    Global,
+}
+
+#[derive(Debug, Eq, PartialEq)]
+pub struct LabelEntry {
+    /// The [`LabelType`] of the label.
+    pub label_type: LabelType,
+    /// The name of the label.
+    pub label_name: String,
+    /// The position of the destination. This may be relative to the block or absolute, depending on the label type.
+    pub position: usize,
+}

redox-core/src/compiling/mod.rs

@@ -1,3 +1,4 @@
 pub mod compiler;
 pub mod decompiler;
 pub mod executable;
+mod labels;

redox-core/src/parsing/mod.rs

@@ -1,3 +1,3 @@
 pub mod asm_parser;
-mod data_declaration;
+pub mod data_declaration;
 mod type_hints;

redox-terminal/src/main.rs

@@ -66,10 +66,7 @@ fn main() {
         panic!("currently unsupported");
     }
 
-    let code = "section .data
-    banana  db  \"apples\"
-    waffles  db  \"waffles\"
-    section .text
+    let code = "section .text
     push 0
     call :LABEL_1
     hlt