[PATCH for 7.0 2/5] h.i386: Simple hello-world test for i386

[Warner Losh <imp@bsdimp.com>]

A simple, tiny, statically linked i386 '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 32-bit i386
binaries.

Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 tests/bsd-user-smoke/h.i386.S | 39 +++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 tests/bsd-user-smoke/h.i386.S

diff --git a/tests/bsd-user-smoke/h.i386.S b/tests/bsd-user-smoke/h.i386.S
new file mode 100644
index 00000000000..0af5a709f15
--- /dev/null
+++ b/tests/bsd-user-smoke/h.i386.S
@@ -0,0 +1,39 @@
+# Copyright (c) 2021 Warner Losh
+# SPDX-License-Identifier: BSD-2-Clause
+
+#include <sys/syscall.h>
+#define STDOUT_FILENO	1
+
+	.text
+	.file	"hello.s"
+	.globl	qemu_start                            # -- Begin function qemu_start
+	.p2align	4, 0x90
+	.type	qemu_start,@function
+qemu_start:                                   # @qemu_start
+# %bb.0:                                # %entry
+	pushl	%ebp
+	movl	%esp, %ebp
+
+	# write(1, .L.str, sizeof(.L.str) - 1)
+	pushl	$(.L.strEnd - .L.str - 1)
+	pushl	$.L.str
+	pushl	$STDOUT_FILENO
+	pushl	%eax			# dummy return address
+	movl	$SYS_write, %eax
+	int	$0x80
+	addl	$16, %esp		# 3 args + 1 dummy
+
+	# _exit(0)
+	pushl	$0
+	pushl	%eax			# dummy return address
+	movl	$SYS_exit, %eax
+	int	$0x80
+.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