refactor: split code gen into arch seam

1 files changed, 23 insertions, 0 deletions

diff --git a/src/ast.h b/src/ast.h
index d764c13..75d8b12 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -118,6 +118,7 @@ enum StatementKind
 	STATEMENT_WHILE,
 	STATEMENT_CALL,
 	STATEMENT_STACK,
+	STATEMENT_INSTRUCTION,
 };
 
 struct AssignStatement
@@ -175,6 +176,17 @@ struct StackStatement
 	struct Expr* size;
 };
 
+// a bare instruction: a mnemonic and its operands emitted verbatim, the escape
+// hatch for anything outside the assignment / control-flow model (int, hlt,
+// lgdt, in/out, ...)
+struct InstructionStatement
+{
+	struct Token mnemonic;
+	struct Expr** operands;
+	size_t operand_count;
+	size_t operand_capacity;
+};
+
 struct Statement
 {
 	enum StatementKind kind;
@@ -187,6 +199,7 @@ struct Statement
 		struct WhileStatement loop;
 		struct CallStatement call;
 		struct StackStatement stack;
+		struct InstructionStatement instruction;
 	};
 };
 
@@ -202,12 +215,22 @@ struct ProcDecl
 	size_t body_capacity;
 };
 
+enum OutputFormat
+{
+	OUTPUT_ELF,
+	OUTPUT_BIN,
+};
+
 struct Config
 {
 	uint32_t bits;
 	bool has_entry;
 	struct Token entry;
 	bool logical_registers;
+	enum OutputFormat format;
+	bool has_org;
+	struct Token org;
+	bool boot;
 };
 
 struct Program