From eb7e8c7165a8291c32fe655d184aa8ef25be8a2e Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@linux-m68k.org>
Date: Mon, 6 Jan 2014 23:22:00 +0100
Subject: [PATCH] Add support for m68k

---
 platform/switch_m68k_gcc.h | 36 ++++++++++++++++++++++++++++++++++++
 slp_platformselect.h       |  2 ++
 2 files changed, 38 insertions(+)
 create mode 100644 platform/switch_m68k_gcc.h

diff --git a/platform/switch_m68k_gcc.h b/platform/switch_m68k_gcc.h
new file mode 100644
index 00000000..0f6df5a9
--- /dev/null
+++ b/platform/switch_m68k_gcc.h
@@ -0,0 +1,36 @@
+/*
+ * this is the internal transfer function.
+ *
+ * HISTORY
+ * 2014-01-06  Andreas Schwab  <schwab@linux-m68k.org>
+ *      File created.
+ */
+
+#ifdef SLP_EVAL
+
+#define STACK_MAGIC 0
+
+#define REGS_TO_SAVE "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
+		     "%a2", "%a3", "%a4"
+
+static int
+slp_switch(void)
+{
+  int *stackref, stsizediff;
+  void *fp, *a5;
+  __asm__ volatile ("" : : : REGS_TO_SAVE);
+  __asm__ volatile ("move.l %%fp, %0" : "=m"(fp));
+  __asm__ volatile ("move.l %%a5, %0" : "=m"(a5));
+  __asm__ ("move.l %%sp, %0" : "=r"(stackref));
+  {
+    SLP_SAVE_STATE(stackref, stsizediff);
+    __asm__ volatile ("add.l %0, %%sp; add.l %0, %%fp" : : "r"(stsizediff));
+    SLP_RESTORE_STATE();
+  }
+  __asm__ volatile ("move.l %0, %%a5" : : "m"(a5));
+  __asm__ volatile ("move.l %0, %%fp" : : "m"(fp));
+  __asm__ volatile ("" : : : REGS_TO_SAVE);
+  return 0;
+}
+
+#endif
diff --git a/slp_platformselect.h b/slp_platformselect.h
index 5d6e3a0c..58fad3eb 100644
--- a/slp_platformselect.h
+++ b/slp_platformselect.h
@@ -36,4 +36,6 @@
 #include "platform/switch_mips_unix.h" /* Linux/MIPS */
 #elif defined(__GNUC__) && defined(__aarch64__)
 #include "platform/switch_aarch64_gcc.h" /* Aarch64 ABI */
+#elif defined(__GNUC__) && defined(__mc68000__)
+#include "platform/switch_m68k_gcc.h" /* gcc on m68k */
 #endif