diff --git a/lib/linux/arm-mes-gcc/exit-42.S b/lib/linux/arm-mes-gcc/exit-42.S
new file mode 100644
index 00000000..afe33713
--- /dev/null
+++ b/lib/linux/arm-mes-gcc/exit-42.S
@@ -0,0 +1,46 @@
+/*
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** Commentary: */
+
+/* Using gdb, esp. GUD in GNU Emacs is recommended
+M-x gdb-display-disassembly-buffer
+M-x gdb-display-io-buffer
+set disassemble-next-line on
+break _start
+run
+info registers
+si
+p/x $r0
+RET
+...
+*/
+
+/** Code: */
+
+SYS_exit = 1 			/* Linux syscall: exit.  */
+	.globl _start		/* Magic linker symbol: --entry-address.  */
+
+	.text			/* Program text. */
+_start:
+	mov	r7,$SYS_exit	/* System call function: exit, in r7.  */
+	mov	r0,$42		/* First parameter: exit status, in r0. */
+	swi	0		/* Call system.  */
+	wfi 			/* Should not be reached.  */
diff --git a/lib/linux/arm-mes-gcc/hello-mes.S b/lib/linux/arm-mes-gcc/hello-mes.S
new file mode 100644
index 00000000..a86928f4
--- /dev/null
+++ b/lib/linux/arm-mes-gcc/hello-mes.S
@@ -0,0 +1,58 @@
+/*
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** Commentary: */
+
+/* Using gdb, esp. GUD in GNU Emacs is recommended
+M-x gdb-display-disassembly-buffer
+M-x gdb-display-io-buffer
+set disassemble-next-line on
+break _start
+run
+info registers
+si
+p/x $r0
+RET
+...
+*/
+
+/** Code: */
+
+SYS_exit 	= 1		/* Linux syscalls.  */
+SYS_write 	= 4
+stdout		= 1		/* File discriptor */
+	.globl _start		/* Magic linker symbol: --entry-address.  */
+
+	.text			/* Program text. */
+_start:
+	mov	r7, $SYS_write	/* System call function: write, in r7.  */
+	mov	r0, $stdout	/* 1st parameter: file descriptor, in r0. */
+	add	r1, pc, $(hello - here - 4) /* 2nd parameter: address, in r1. */
+here:
+	mov	r2, $(bye-hello)	/* 3rd parameter: byte count r2. */
+	swi     0		/* Call system.  */
+
+	mov	r7,$SYS_exit	/* System call function: exit, in r7.  */
+	mov	r0,$0		/* 1st parameter: exit status, in r0. */
+	swi	0		/* Call system.  */
+	wfi 			/* Should not be reached.  */
+
+hello:	.ascii	"Hello, GNU Mes!\n"
+bye: