From 92855ebb3e42669ccbcbac8bfe13d30b6e6fe894 Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Mon, 23 Oct 2023 16:53:50 +0100
Subject: Starting development on assembly language
---
Makefile | 25 ++++++++++++++++++++++++-
asm/main.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 70 insertions(+), 1 deletion(-)
create mode 100644 asm/main.c
diff --git a/Makefile b/Makefile
index 2ca4781..b6ec0b3 100644
--- a/Makefile
+++ b/Makefile
@@ -28,6 +28,14 @@ VM_VERBOSE=0
VM_CFLAGS:=$(CFLAGS) -D VERBOSE=$(VM_VERBOSE)
VM_OUT=$(DIST)/ovm.out
+## ASSEMBLY setup
+ASM_DIST=$(DIST)/asm
+ASM_SRC=asm
+ASM_CODE:=$(addprefix $(ASM_SRC)/, )
+ASM_OBJECTS:=$(ASM_CODE:$(ASM_SRC)/%.c=$(ASM_DIST)/%.o)
+ASM_DEPS:=$(ASM_OBJECTS:%.o=%.d) $(ASM_DIST)/main.d
+ASM_CFLAGS=$(CFLAGS)
+ASM_OUT=$(DIST)/asm.out
## EXAMPLES setup
EXAMPLES_DIST=$(DIST)/examples
@@ -36,10 +44,11 @@ EXAMPLES_CFLAGS=$(CFLAGS)
EXAMPLES=$(DIST)/fib.out
# Things you want to build on `make`
-all: $(DIST) lib vm examples
+all: $(DIST) lib vm asm examples
lib: $(LIB_DIST) $(LIB_OBJECTS)
vm: $(VM_DIST) $(VM_OUT)
+asm: $(ASM_DIST) $(ASM_OUT)
examples: $(EXAMPLES_DIST) $(EXAMPLES)
# Recipes
@@ -61,6 +70,17 @@ $(VM_DIST)/%.o: $(VM_SRC)/%.c
@$(CC) $(VM_CFLAGS) -MMD -c $< -o $@ $(LIBS)
@echo -e "$(TERM_GREEN)$@$(TERM_RESET)"
+## ASSEMBLY Recipes
+$(ASM_OUT): $(LIB_OBJECTS) $(VM_DIST)/inst.o $(ASM_OBJECTS) $(ASM_DIST)/main.o
+ @$(CC) $(ASM_CFLAGS) $^ -o $@ $(LIBS)
+ @echo -e "$(TERM_GREEN)$@$(TERM_RESET)"
+
+-include $(ASM_DEPS)
+
+$(ASM_DIST)/%.o: $(ASM_SRC)/%.c
+ @$(CC) $(ASM_CFLAGS) -MMD -c $< -o $@ $(LIBS)
+ @echo -e "$(TERM_GREEN)$@$(TERM_RESET)"
+
## EXAMPLES recipes
$(DIST)/fib.out: $(LIB_OBJECTS) $(VM_OBJECTS) $(ASM_OBJECTS) $(EXAMPLES_DIST)/fib.o
@$(CC) $(EXAMPLES_CFLAGS) $^ -o $@ $(LIBS)
@@ -90,5 +110,8 @@ $(LIB_DIST):
$(VM_DIST):
mkdir -p $(VM_DIST)
+$(ASM_DIST):
+ mkdir -p $(ASM_DIST)
+
$(EXAMPLES_DIST):
mkdir -p $(EXAMPLES_DIST)
diff --git a/asm/main.c b/asm/main.c
new file mode 100644
index 0000000..3f6209b
--- /dev/null
+++ b/asm/main.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 2023 Aryadev Chavali
+
+ * You may distribute and modify this code under the terms of the
+ * GPLv2 license. You should have received a copy of the GPLv2
+ * license with this file. If not, please write to:
+ * aryadev@aryadevchavali.com.
+
+ * Created: 2023-10-23
+ * Author: Aryadev Chavali
+ * Description: Assembly source code compiler, targeting OVM
+ */
+
+#include <stdio.h>
+
+#include <lib/darr.h>
+
+typedef enum TokenType
+{
+ TOKEN_WHITESPACE,
+ TOKEN_BYTE_LITERAL,
+ TOKEN_HWORD_LITERAL,
+ TOKEN_WORD_LITERAL,
+ TOKEN_SYMBOL,
+} token_type_t;
+
+typedef struct
+{
+ token_type_t type;
+ char *str;
+ size_t str_size;
+} token_t;
+
+// We can use darr_read_file as an in memory buffer of source code
+// Then just create new darr's for tokens, then instructions. Then
+// emit bytecode in the end.
+
+int main(void)
+{
+ FILE *fp = fopen("main.asm", "rb");
+ darr_t darr = darr_read_file(fp);
+ fclose(fp);
+ darr.data[darr.available - 1] = '\0';
+ printf("%lu/%lu\n%s\n", darr.used, darr.available, darr.data);
+ free(darr.data);
+ return 0;
+}
--
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