From 7bf906f3692618c21d2a03600cb6bd84b1e9a467 Mon Sep 17 00:00:00 2001
From: Toby Jaffey <toby@ringtailsoftware.co.uk>
Date: Mon, 8 Dec 2025 02:45:38 +0000
Subject: [PATCH] Rename .s to .S so preprocessor runs
 (https://stackoverflow.com/questions/33358825/gnu-assembler-preprocessor-define)

---
 apps/crt0.S                | 13 +++++++++++++
 apps/hello-asm/hello-asm.S | 12 ++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 apps/crt0.S
 create mode 100644 apps/hello-asm/hello-asm.S

diff --git a/apps/crt0.S b/apps/crt0.S
new file mode 100644
index 0000000..220fd7a
--- /dev/null
+++ b/apps/crt0.S
@@ -0,0 +1,13 @@
+#include "uvm32_sys.h"
+#include "uvm32_common_custom.h"
+.section .initial_jump , "ax", %progbits
+.global _start
+.align 4
+_start:
+# sp is already setup by vm
+sw	ra,12(sp)
+jal	ra, main
+li a7, 0x138 #IOREQ_HALT (Rust assembler doesn't pick up def...)
+ecall
+.section .data
+
diff --git a/apps/hello-asm/hello-asm.S b/apps/hello-asm/hello-asm.S
new file mode 100644
index 0000000..a38c926
--- /dev/null
+++ b/apps/hello-asm/hello-asm.S
@@ -0,0 +1,12 @@
+#include "uvm32_sys.h"
+#include "uvm32_common_custom.h"
+.section .initial_jump , "ax", %progbits
+.global _start
+_start:
+la     a0, str
+li a7, IOREQ_PRINTLN
+ecall
+li a7, IOREQ_HALT
+ecall
+str:
+.ascii "Hi\0"