1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tile/makecontext.c b/sysdeps/unix/sysv/linux/tile/makecontext.c
new file mode 100644
index 0000000000..2ed30f48ba
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tile/makecontext.c
@@ -0,0 +1,67 @@
+/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <arch/abi.h>
+
+void
+__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
+{
+  extern void __startcontext (void);
+  uint_reg_t *sp, *args;
+  va_list ap;
+  int i;
+
+  /* Initialize the top of stack. */
+  sp = (uint_reg_t *) ((((intptr_t) ucp->uc_stack.ss_sp
+                         + ucp->uc_stack.ss_size) & -16L) - 16);
+
+  /* Allow room for memory-passed arguments if necessary. */
+  if (argc > 10)
+    sp -= 2 + (argc - 10);
+
+  sp[0] = sp[1] = 0;
+
+  /* Set parameters.  */
+  va_start (ap, argc);
+  args = &ucp->uc_mcontext.gregs[0];
+  for (i = 0; i < argc; i++)
+    {
+      if (i == 10)
+        args = &sp[2];
+      *args++ = va_arg (ap, long);
+    }
+  va_end (ap);
+
+  /* Pass (*func) to __startcontext in pc.  */
+  ucp->uc_mcontext.pc = (long) func;
+
+  /* Set stack pointer.  */
+  ucp->uc_mcontext.sp = (long) sp;
+
+  /* Set the return address to trampoline.  */
+  ucp->uc_mcontext.lr = (long) __startcontext;
+
+  /* Pass ucp->uc_link to __startcontext in r30.  */
+  ucp->uc_mcontext.gregs[30] = (long) ucp->uc_link;
+}
+weak_alias (__makecontext, makecontext)