diff --git a/lib/linux/aarch64-mes-gcc/_exit.c b/lib/linux/aarch64-mes-gcc/_exit.c
new file mode 100644
index 00000000..fcc148ec
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/_exit.c
@@ -0,0 +1,51 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.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/>.
+ */
+
+#include "mes/lib-mini.h"
+
+// *INDENT-OFF*
+#if !__TINYC__
+#define SYS_exit "93"
+void
+_exit (int code)
+{
+  asm (
+       "mov    x7, $"SYS_exit"\n\t"
+       "mov    x0, %0\n\t"
+       "svc    $0\n\t"
+       : // no outputs "=" (r)
+       : "r" (code)
+       : "x0", "x7"
+       );
+  // not reached
+  _exit (0);
+}
+#else //__TINYC__
+#define SYS_exit 0x01
+void
+_exit (int code)
+{
+  int c = SYS_exit;
+  __asm__ (".int 0xe51b7004\n"); //ldr   r7, [fp, #-4] ; "c"
+  __asm__ (".int 0xe59b000c\n"); //ldr   r0, [fp, #12] ; code
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+}
+#endif //__TINYC__
diff --git a/lib/linux/aarch64-mes-gcc/_write.c b/lib/linux/aarch64-mes-gcc/_write.c
new file mode 100644
index 00000000..7e748757
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/_write.c
@@ -0,0 +1,60 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.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/>.
+ */
+
+#include "mes/lib-mini.h"
+
+// *INDENT-OFF*
+#if !__TINYC__
+#define SYS_write "64"
+ssize_t
+_write (int filedes, void const *buffer, size_t size)
+{
+  long r;
+  asm (
+       "mov    x7, $"SYS_write"\n\t"
+       "mov    x0, %1\n\t"
+       "mov    x1, %2\n\t"
+       "mov    x2, %3\n\t"
+       "svc    $0\n\t"
+       "mov    %0, x0\n\t"
+       : "=r" (r)
+       : "r" (filedes), "r" (buffer), "r" (size)
+       : "r0", "r1", "r2", "r7"
+       );
+  return r;
+}
+#else //__TINYC__
+#define SYS_write 0x04
+ssize_t
+_write (int filedes, void const *buffer, size_t size)
+{
+  long r;
+  int c = SYS_write;
+  __asm__ (".int 0xe51b7008\n"); //ldr   r7, [fp, #-8] ; <c>
+  __asm__ (".int 0xe59b000c\n"); //ldr   r0, [fp, #12] ; filedes
+  __asm__ (".int 0xe59b1010\n"); //ldr   r1, [fp, #16] ; buffer
+  __asm__ (".int 0xe59b2014\n"); //ldr   r2, [fp, #20] ; size
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe50b0004\n"); //str   r0, [fp, #-4]
+  return r;
+}
+#endif //__TINYC__
+// *INDENT-ON*
diff --git a/lib/linux/aarch64-mes-gcc/crt1.c b/lib/linux/aarch64-mes-gcc/crt1.c
new file mode 100644
index 00000000..989497e1
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/crt1.c
@@ -0,0 +1,154 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.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/>.
+ */
+
+#include <mes/lib-mini.h>
+//int main (int argc, char *argv[], char *envp[]);
+
+/* Note: GCC may or may not omit the frame pointer,
+ * depending on whether it thinks this is a leaf function.
+ */
+// *INDENT-OFF*
+#if !__TINYC__
+void
+_start ()
+{
+  asm (
+       "mov    w0,#0\n\t"
+       "mov    %0,w0\n"
+       : "=r" (__stdin)
+       : //no inputs ""
+       );
+
+  asm (
+       "mov    w0,#1\n\t"
+       "mov    %0,w0\n"
+       : "=r" (__stdout)
+       : //no inputs ""
+       );
+
+  asm (
+       "mov    w0,#2\n\t"
+       "mov    %0,w0\n"
+       : "=r" (__stderr)
+       : //no inputs ""
+       );
+
+  /* environ = argv + argc + 1 */
+  asm (
+       "ldr     x0,[sp]\n\t" /* x0 = argc */
+       "add     x1,sp,#8\n\t" /* x1 = &argv[0] */
+       "add     x2,x0,#1\n\t" /* x2 = argc + 1 (skip zero word after argv) */
+       "lsl     x2,#3\n\t" /* x2 = (argc + 1) << 3 */
+       "add     x2,x2,x1\n\t" /* x2 = ((argc + 1) << 3) + &argv[0] */
+       "stp     x1,x2,[sp,#0x10]!\n\t" /* argv, envp */
+       "stp     xzr,x0,[sp,#0x10]!\n\t" /* 0, argc */
+       "mov     %0,x2\n\t"
+       : "=r" (environ)
+       : //no inputs ""
+       );
+  asm (
+       "ldp     xzr,x0,[sp],#0x10\n\t" /* 0, argc */
+       "ldp     x1,x2,[sp],#0x10\n\t" /* argv, envp */
+       "bl      main\n\t"
+       "mov     x7, #93\n\t"
+       "svc     #0\n\t"
+       "wfi     \n\t"
+       );
+}
+#else //__TINYC__
+void
+_start ()
+{
+#if 0
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+#endif
+
+  int *in = &__stdin;
+  int *out = &__stdout;
+  int *err = &__stderr;
+  char ***env = &environ;
+
+#if 0
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+  *in = 0x22;
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+  *out = 0x33;
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+  *err = 0x44;
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+  *env = 0x55;
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+#endif
+
+  /* environ = argv + argc + 1 */
+  __asm__ (".int 0xe59b000c\n"); //ldr   r0, [fp, #12]
+  __asm__ (".int 0xe28b1010\n"); //add   r1, fp, #16
+
+  __asm__ (".int 0xe2802001\n"); //add   r2, r0, #1
+  __asm__ (".int 0xe1a02102\n"); //lsl   r2, r2, #2
+  __asm__ (".int 0xe0822001\n"); //add   r2, r2, r1
+
+  // setup argc, argv, envp parameters on stack
+  __asm__ (".int 0xe52d2004\n"); //push  {r2}      ; (str r2, [sp, #-4]!)
+  __asm__ (".int 0xe52d1004\n"); //push  {r1}      ; (str r1, [sp, #-4]!)
+  __asm__ (".int 0xe52d0004\n"); //push  {r0}      ; (str r0, [sp, #-4]!)
+  __asm__ (".int 0xe1a02002\n"); //mov   r2, r2
+
+  // *in = 0;
+  __asm__ (".int 0xe3a01000\n"); //mov   r1, #0
+  __asm__ (".int 0xe51b0004\n"); //ldr   r0, [fp, #-4]
+  __asm__ (".int 0xe5801000\n"); //str   r1, [r0]
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+
+  // *out = 1;
+  __asm__ (".int 0xe3a01001\n"); //mov   r1, #1
+  __asm__ (".int 0xe51b0008\n"); //ldr   r0, [fp, #-8]
+  __asm__ (".int 0xe5801000\n"); //str   r1, [r0]
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+
+  // *err = 2;
+  __asm__ (".int 0xe3a01002\n"); //mov   r1, #2
+  __asm__ (".int 0xe51b000c\n"); //ldr   r0, [fp, #-12]
+  __asm__ (".int 0xe5801000\n"); //str   r1, [r0]
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+
+  // *env = [sp, #8]
+  __asm__ (".int 0xe59d1008\n"); //ldr   r1, [sp, #8]
+  __asm__ (".int 0xe51b0010\n"); //ldr   r0, [fp, #-16]
+  __asm__ (".int 0xe5801000\n"); //str   r1, [r0]
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+
+  // setup argc, argv, envp parameters in registers
+  __asm__ (".int 0xe59d0000\n"); //ldr   r0, [sp]
+  __asm__ (".int 0xe59d1004\n"); //ldr   r1, [sp, #4]
+  __asm__ (".int 0xe59d2008\n"); //ldr   r2, [sp, #8]
+  main ();
+
+  __asm__ (".int 0xe3a07001\n"); //mov   r7, #1
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe320f003\n"); //wfi
+  __asm__ (".int 0xe320f000\n"); //nop   {0}
+}
+#endif //__TINYC__
diff --git a/lib/linux/aarch64-mes-gcc/crti.c b/lib/linux/aarch64-mes-gcc/crti.c
new file mode 100644
index 00000000..e11c4684
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/crti.c
@@ -0,0 +1,19 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2018 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/>.
+ */
diff --git a/lib/linux/aarch64-mes-gcc/crtn.c b/lib/linux/aarch64-mes-gcc/crtn.c
new file mode 100644
index 00000000..e11c4684
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/crtn.c
@@ -0,0 +1,19 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2018 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/>.
+ */
diff --git a/lib/linux/aarch64-mes-gcc/exit-42.S b/lib/linux/aarch64-mes-gcc/exit-42.S
new file mode 100644
index 00000000..4c431e60
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/exit-42.S
@@ -0,0 +1,31 @@
+/*
+ * 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: */
+
+/** Code: */
+
+.text
+.globl _start
+_start:
+	mov	x8, #93
+	mov	x0, #42
+	svc	#0
+	wfi
diff --git a/lib/linux/aarch64-mes-gcc/hello-mes.S b/lib/linux/aarch64-mes-gcc/hello-mes.S
new file mode 100644
index 00000000..ef63dc1d
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/hello-mes.S
@@ -0,0 +1,40 @@
+/*
+ * 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: */
+
+/** Code: */
+
+.text
+.globl _start
+_start:
+	mov	x8, #64
+	mov	x0, #1
+	mov	x1, hello
+	mov	x2, $(end-hello)
+	svc     #0
+
+	mov	x8, #93
+	mov	x0, xzr
+	svc	#0
+	wfi
+
+hello:	.ascii	"Hello, GNU Mes!\n"
+end:
diff --git a/lib/linux/aarch64-mes-gcc/syscall-internal.c b/lib/linux/aarch64-mes-gcc/syscall-internal.c
new file mode 100644
index 00000000..b077a9be
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/syscall-internal.c
@@ -0,0 +1,66 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2018,2019 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/>.
+ */
+
+#include <linux/aarch64/syscall.h>
+
+// *INDENT-OFF*
+static long
+__sys_call_internal (long sys_call)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "svc    $0\n\t"
+       "mov    %0, x0\n\t"
+       : "=r" (r)
+       : "r" (sys_call)
+       : "x0", "x7"
+       );
+  return r;
+}
+
+static long
+__sys_call2_internal (long sys_call, long one, long two)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "mov    x0, %2\n\t"
+       "mov    x1, %3\n\t"
+       "swi    $0\n\t"
+       "mov    %0, x0\n\t"
+       : "=r" (r)
+       : "r" (sys_call), "r" (one), "r" (two)
+       : "x0", "x1", "x7"
+       );
+  return r;
+}
+// *INDENT-ON*
+
+/* Returns < 0 on error (errno-like value from kernel), or 0 on success */
+int
+__raise (int signum)
+{
+  long pid = __sys_call_internal (SYS_getpid);
+  if (pid < 0)
+    return pid;
+  else
+    return __sys_call2_internal (SYS_kill, pid, signum);
+}
diff --git a/lib/linux/aarch64-mes-gcc/syscall.c b/lib/linux/aarch64-mes-gcc/syscall.c
new file mode 100644
index 00000000..b1a4329b
--- /dev/null
+++ b/lib/linux/aarch64-mes-gcc/syscall.c
@@ -0,0 +1,276 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2018,2019,2020 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/>.
+ */
+
+#include <errno.h>
+#include <linux/aarch64/syscall.h>
+
+#if !__TINYC__
+// *INDENT-OFF*
+long
+__sys_call (long sys_call)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "svc    $0\n\t"
+       "mov    %0, x0\n\t"
+       : "=r" (r)
+       : "r" (sys_call)
+       : "x0", "x7"
+       );
+  return r;
+}
+#else //__TINYC__
+long
+__sys_call (long sys_call)
+{
+  long r;
+  __asm__ (".int 0xe1a07000\n"); //mov	r7, r0
+  // __asm__ (".int 0xe1a00001\n"); //mov   r0, r1
+  // __asm__ (".int 0xe1a01002\n"); //mov   r1, r2
+  // __asm__ (".int 0xe1a02003\n"); //mov   r2, r3
+  // __asm__ (".int 0xe1a03004\n"); //mov   r3, r4
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe50b0004\n"); //str   r0, [fp, #-4]
+  return r;
+}
+#endif //__TINYC__
+
+#if !__TINYC__
+long
+__sys_call1 (long sys_call, long one)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "mov    x0, %2\n\t"
+       "svc    $0\n\t"
+       "mov    %0, x0\n\t"
+       : "=r" (r)
+       : "r" (sys_call), "r" (one)
+       : "x0", "x7"
+       );
+  return r;
+}
+#else //__TINYC__
+long
+__sys_call1 (long sys_call, long one)
+{
+  long r;
+  __asm__ (".int 0xe1a07000\n"); //mov   r7, r0
+  __asm__ (".int 0xe1a00001\n"); //mov   r0, r1
+  // __asm__ (".int 0xe1a01002\n"); //mov   r1, r2
+  // __asm__ (".int 0xe1a02003\n"); //mov   r2, r3
+  // __asm__ (".int 0xe1a03004\n"); //mov   r3, r4
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe50b0004\n"); //str   r0, [fp, #-4]
+  return r;
+}
+#endif //__TINYC__
+
+#if !__TINYC__
+long
+__sys_call2 (long sys_call, long one, long two)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "mov    x0, %2\n\t"
+       "mov    x1, %3\n\t"
+       "svc    $0\n\t"
+       "mov    %0, x0\n\t"
+       : "=r" (r)
+       : "r" (sys_call), "r" (one), "r" (two)
+       : "x0", "x1", "x7"
+       );
+  return r;
+}
+#else //__TINYC__
+long
+__sys_call2 (long sys_call, long one, long two)
+{
+  long r;
+  __asm__ (".int 0xe1a07000\n"); //mov   r7, r0
+  __asm__ (".int 0xe1a00001\n"); //mov   r0, r1
+  __asm__ (".int 0xe1a01002\n"); //mov   r1, r2
+  // __asm__ (".int 0xe1a02003\n"); //mov   r2, r3
+  // __asm__ (".int 0xe1a03004\n"); //mov   r3, r4
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe50b0004\n"); //str   r0, [fp, #-4]
+  return r;
+}
+#endif //__TINYC__
+
+#if !__TINYC__
+long
+__sys_call3 (long sys_call, long one, long two, long three)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "mov    x0, %2\n\t"
+       "mov    x1, %3\n\t"
+       "mov    x2, %4\n\t"
+       "svc    $0\n\t"
+       "mov    %0, r0\n\t"
+       : "=r" (r)
+       : "r" (sys_call), "r" (one), "r" (two), "r" (three)
+       : "x0", "x1", "x2", "x7"
+       );
+  return r;
+}
+#else //__TINYC__
+long
+__sys_call3 (long sys_call, long one, long two, long three)
+{
+  long r;
+  __asm__ (".int 0xe1a07000\n"); //mov   r7, r0
+  __asm__ (".int 0xe1a00001\n"); //mov   r0, r1
+  __asm__ (".int 0xe1a01002\n"); //mov   r1, r2
+  __asm__ (".int 0xe1a02003\n"); //mov   r2, r3
+  // __asm__ (".int 0xe1a03004\n"); //mov   r3, r4
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe50b0004\n"); //str   r0, [fp, #-4]
+  return r;
+}
+#endif //__TINYC__
+
+#if !__TINYC__
+long
+__sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+  long r;
+  asm (
+       "mov    x7, %1\n\t"
+       "mov    x0, %2\n\t"
+       "mov    x1, %3\n\t"
+       "mov    x2, %4\n\t"
+       "mov    x3, %5\n\t"
+       "svc    $0\n\t"
+       "mov    %0, r0\n\t"
+       : "=r" (r)
+       : "r" (sys_call), "r" (one), "r" (two), "r" (three), "r" (four)
+       : "x0", "x1", "x2", "x3", "x7"
+       );
+  return r;
+}
+#else //__TINYC__
+long
+__sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+  long r;
+  __asm__ (".int 0xe1a07000\n"); //mov   r7, r0
+  __asm__ (".int 0xe1a00001\n"); //mov   r0, r1
+  __asm__ (".int 0xe1a01002\n"); //mov   r1, r2
+  __asm__ (".int 0xe1a02003\n"); //mov   r2, r3
+  __asm__ (".int 0xe1a03004\n"); //mov   r3, r4
+  __asm__ (".int 0xef000000\n"); //svc   0x00000000
+  __asm__ (".int 0xe50b0004\n"); //str   r0, [fp, #-4]
+  return r;
+}
+#endif //__TINYC__
+
+// *INDENT-ON*
+
+long
+_sys_call (long sys_call)
+{
+  long r = __sys_call (sys_call);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call1 (long sys_call, long one)
+{
+  long r = __sys_call1 (sys_call, one);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call2 (long sys_call, long one, long two)
+{
+  long r = __sys_call2 (sys_call, one, two);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call3 (long sys_call, long one, long two, long three)
+{
+  long r = __sys_call3 (sys_call, one, two, three);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+long
+_sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+  long r = __sys_call4 (sys_call, one, two, three, four);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+
+#if 0
+long
+_sys_call6 (long sys_call, long one, long two, long three, long four, long five, long six)
+{
+  long r = __sys_call6 (sys_call, one, two, three, four, five, six);
+  if (r < 0)
+    {
+      errno = -r;
+      r = -1;
+    }
+  else
+    errno = 0;
+  return r;
+}
+#endif
diff --git a/lib/linux/aarch64-mes/elf64-0exit-42.hex2 b/lib/linux/aarch64-mes/elf64-0exit-42.hex2
new file mode 100644
index 00000000..8ffa00ff
--- /dev/null
+++ b/lib/linux/aarch64-mes/elf64-0exit-42.hex2
@@ -0,0 +1,7 @@
+:ELF_text
+a8 0b 80 d2	# mov x8, #93
+40 05 80 d2	# mov x0, #42
+01 00 00 d4	# svc #0
+7f 20 03 d5	# wfi
+
+:ELF_end
diff --git a/lib/linux/aarch64-mes/elf64-0header.hex2 b/lib/linux/aarch64-mes/elf64-0header.hex2
new file mode 100644
index 00000000..073b563a
--- /dev/null
+++ b/lib/linux/aarch64-mes/elf64-0header.hex2
@@ -0,0 +1,75 @@
+### Copyright (C) 2016 Jeremiah Orians
+### Copyright (C) 2017 Jan Nieuwenhuizen <janneke@gnu.org>
+### Copyright (C) 2020 deesix <deesix@tuta.io>
+### This file is part of M2-Planet.
+###
+### M2-Planet 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.
+###
+### M2-Planet 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 M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+
+### stage0's hex2 format
+###    !<label>          1 byte relative
+###    $<label>          2 byte address
+###    @<label>          2 byte relative
+###    &<label>          4 byte address
+###    %<label>          4 byte relative
+
+### if you wish to use this header, you need to add :ELF_end to the end of your
+### M1 or hex2 files.
+
+## ELF Header
+
+:ELF_base
+7F 45 4C 46                               # e_ident[EI_MAG0-3] ELF's magic number
+
+02                                        # e_ident[EI_CLASS] Indicating 64 bit
+01                                        # e_ident[EI_DATA] Indicating little endianness
+01                                        # e_ident[EI_VERSION] Indicating original elf
+
+03                                        # e_ident[EI_OSABI] Set at 3 because FreeBSD is strict
+00                                        # e_ident[EI_ABIVERSION] See above
+
+00 00 00 00 00 00 00                      # e_ident[EI_PAD]
+
+02 00                                     # e_type Indicating Executable
+B7 00                                     # e_machine Indicating AArch64
+01 00 00 00                               # e_version Indicating original elf
+
+&ELF_text 00 00 00 00                     # e_entry Address of the entry point
+%ELF_program_headers>ELF_base 00 00 00 00 # e_phoff Address of program header table
+00 00 00 00 00 00 00 00                   # e_shoff Address of section header table
+
+00 00 00 00                               # e_flags
+
+40 00                                     # e_ehsize Indicating our 64 Byte header
+
+38 00                                     # e_phentsize size of a program header table
+01 00                                     # e_phnum number of entries in program table
+
+00 00                                     # e_shentsize size of a section header table
+00 00                                     # e_shnum number of entries in section table
+
+00 00                                     # e_shstrndx index of the section names
+
+
+:ELF_program_headers
+:ELF_program_header__text
+01 00 00 00                               # ph_type: PT-LOAD = 1
+07 00 00 00                               # ph_flags: PF-X|PF-W|PF-R = 7
+00 00 00 00 00 00 00 00                   # ph_offset
+&ELF_base 00 00 00 00                     # ph_vaddr
+&ELF_base 00 00 00 00                     # ph_physaddr
+%ELF_end>ELF_base 00 00 00 00             # ph_filesz
+%ELF_end>ELF_base 00 00 00 00             # ph_memsz
+01 00 00 00 00 00 00 00                   # ph_align
+
+:ELF_text