[PATCH for 7.0 1/5] h.armv7: Simple hello-world test for armv7

[Warner Losh <imp@bsdimp.com>]

A simple, tiny, statically linked armv7 'hello world' test. It uses two
system calls (write and exit) and provides a basic sanity check to make
sure that the arm bsd-user binary can interpret FreeBSD armv7 binaries.

Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 tests/bsd-user-smoke/h.armv7.S | 37 ++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 tests/bsd-user-smoke/h.armv7.S

diff --git a/tests/bsd-user-smoke/h.armv7.S b/tests/bsd-user-smoke/h.armv7.S
new file mode 100644
index 00000000000..fe986f15ef6
--- /dev/null
+++ b/tests/bsd-user-smoke/h.armv7.S
@@ -0,0 +1,37 @@
+# Copyright (c) 2021 Warner Losh
+# SPDX-License-Identifier: BSD-2-Clause
+
+#include <sys/syscall.h>
+#define STDOUT_FILENO	1
+
+	.text
+	.file	"hello.s"
+	.syntax unified
+	.globl	qemu_start                            @ -- Begin function qemu_start
+	.p2align	2
+	.type	qemu_start,%function
+	.code	32                              @ @qemu_start
+qemu_start:
+@ %bb.0:                                @ %entry
+
+	# write(1, .L.str, sizeof(.L.str) - 1)
+	movw	r1, :lower16:.L.str	@ Load hello world
+	movt	r1, :upper16:.L.str
+	ldr	r0, =STDOUT_FILENO
+	ldr	r2, =(.L.strEnd - .L.str - 1)
+	ldr	r7, =SYS_write
+	swi	0
+
+	# _exit(0)
+	ldr	r0, =0			@ success
+	ldr	r7, =SYS_exit
+	swi	0
+.Lfunc_end0:
+	.size	qemu_start, .Lfunc_end0-qemu_start
+                                        @ -- End function
+	.type	.L.str,%object                  @ @.str
+	.section	.rodata.str1.1,"aMS",%progbits,1
+.L.str:
+	.asciz	"Hello World\n"
+.L.strEnd:
+	.size .L.str, .L.strEnd - .L.str
-- 
2.33.0