urt: Add user run-time library groundwork

Signed-off-by: Chloe M. <chloe@mensia.org>
2026-07-15 07:52:57 +00:00
parent 322985d8a3
commit a45f1df00d
8 changed files with 144 additions and 0 deletions
@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2026, Chloe M.
+# Provided under the BSD-3 clause
+#
+# Description:  User run-time machdep build script
+# Author:       Chloe M.
+#
+
+ASMFILES = $(shell find . -name "*.S")
+ASMOFILES = $(ASMFILES:.S=.S.o)
+
+CFLAGS = $(SYS_CFLAGS)
+
+.PHONY: all
+all: $(ASMOFILES)
+
+%.S.o: %.S
+	$(SYS_CC) -c $< $(CFLAGS) -o $@
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: C-runtime entry
+ * Author:      Chloe M.
+ */
+
+    .text
+    .globl _start
+_start:
+    xor %rbp, %rbp  /* Terminate callstack */
+    call Main       /* Enter program main */
+1:  pause
+    jmp 1b