Initial commit

boot/asm-boot.s

@@ -0,0 +1,29 @@
+# s1 - Contains the current position in the source text.
+
+.data
+
+.equ SYS_EXIT, 93
+.equ SOURCE_BUFFER_SIZE, 2048
+
+.bss
+.global source_code
+.type source_code, @object
+.size source_code, SOURCE_BUFFER_SIZE
+source_code: .zero SOURCE_BUFFER_SIZE
+
+.text
+.global _start # Program entry point.
+
+_start:
+	# Read the source from the standard input.
+	la a0, source_code
+	li a1, SOURCE_BUFFER_SIZE # Buffer size.
+	call read_file
+
+	la s1, source_code # s1 = Source code position.
+	call compile
+
+	# Call exit.
+	addi a0, zero, 0   # Use 0 return code.
+	addi a7, zero, SYS_EXIT
+	ecall