1 files changed, 66 insertions, 0 deletions
diff --git a/sysdeps/i386/__longjmp.c b/sysdeps/i386/__longjmp.c
new file mode 100644
index 0000000000..65d6ec18ec
--- /dev/null
+++ b/sysdeps/i386/__longjmp.c
@@ -0,0 +1,66 @@
+/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifndef	__GNUC__
+  #error This file uses GNU C extensions; you must compile with GCC.
+#endif
+
+/* Put these global register declarations first, because we get an error if
+   they come after any function definition, including inlines which might
+   be in some header.  */
+
+#define REGS \
+  REG (bx);\
+  REG (si);\
+  REG (di);\
+  REG (bp);\
+  REG (sp)
+
+#define REG(xx) register long int xx asm (#xx)
+REGS;
+#undef	REG
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <setjmp.h>
+#include <stdlib.h>
+
+/* Jump to the position specified by ENV, causing the
+   setjmp call there to return VAL, or 1 if VAL is 0.  */
+void
+DEFUN(__longjmp, (env, val),
+      __jmp_buf env AND int val)
+{
+  /* We specify explicit registers because, when not optimizing,
+     the compiler will generate code that uses the frame pointer
+     after it's been munged.  */
+
+  register CONST __typeof (env[0]) *e asm ("cx");
+  register int v asm ("ax");
+
+  e = env;
+  v = val == 0 ? 1 : val;
+
+#define	REG(xx)	xx = (long int) e->__##xx
+  REGS;
+
+  asm volatile ("jmp %*%0" : : "g" (e->__pc), "a" (v));
+
+  /* NOTREACHED */
+  abort ();
+}