1 files changed, 35 insertions, 0 deletions
diff --git a/boot/echo-boot.s b/boot/echo-boot.s
new file mode 100644
index 0000000..b6e65f7
--- /dev/null
+++ b/boot/echo-boot.s
@@ -0,0 +1,35 @@
+.global _start, source_code
+
+.section .rodata
+.type SOURCE_BUFFER_SIZE, @object
+.size SOURCE_BUFFER_SIZE, 4
+SOURCE_BUFFER_SIZE: .long 4096
+
+.section .bss
+.type source_code, @object
+.size source_code, 4096
+source_code: .zero 4096
+
+.section .text
+
+_compile:
+	ret
+
+_start:
+	# Read the source from the standard input.
+	la a0, source_code
+	la a1, SOURCE_BUFFER_SIZE # Buffer size.
+	lw a1, (a1)
+	call read_file
+	mv s1, a0
+
+	call _compile
+
+	# Write the source to the standard output.
+	la a0, source_code
+	mv a1, s1
+	call write_out
+
+	# Call exit.
+	li a0, 0   # Use 0 return code.
+	call exit