S/390: Make jmp_buf extendible.

16 files changed, 490 insertions, 18 deletions

diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
new file mode 100644
index 0000000..fdc6ee5
--- /dev/null
+++ b/sysdeps/s390/Makefile
@@ -0,0 +1,5 @@
+ifeq ($(subdir),setjmp)
+ifeq (yes,$(build-shared))
+sysdep_routines += v1-longjmp v1-sigjmp
+endif
+endif
diff --git a/sysdeps/s390/Versions b/sysdeps/s390/Versions
index baf9842..156abc7 100644
--- a/sysdeps/s390/Versions
+++ b/sysdeps/s390/Versions
@@ -1,3 +1,14 @@
+libc {
+  GLIBC_2.19 {
+    setjmp; _setjmp; __setjmp; __sigsetjmp;
+    longjmp; _longjmp; siglongjmp;
+  }
+  GLIBC_PRIVATE {
+    __v1__libc_longjmp; __v1__libc_siglongjmp;
+    __v2__libc_longjmp; __v2__libc_siglongjmp;
+  }
+}
+
 ld {
   GLIBC_2.3 {
     # runtime interface to TLS
diff --git a/sysdeps/s390/__longjmp.c b/sysdeps/s390/__longjmp.c
new file mode 100644
index 0000000..e4acd31
--- /dev/null
+++ b/sysdeps/s390/__longjmp.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 2013 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 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 <libc-symbols.h>
+#include <shlib-compat.h>
+
+#define __longjmp  __v2__longjmp
+#include "__longjmp-common.c"
+#undef __longjmp
+strong_alias (__v2__longjmp, __longjmp)
+
+#if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19)
+# undef __longjmp
+# define __V1_JMPBUF
+# define __longjmp  __v1__longjmp
+# include "__longjmp-common.c"
+#endif /* if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19) */
diff --git a/sysdeps/s390/bits/setjmp.h b/sysdeps/s390/bits/setjmp.h
index 0071a9d..25eaf10 100644
--- a/sysdeps/s390/bits/setjmp.h
+++ b/sysdeps/s390/bits/setjmp.h
@@ -40,6 +40,10 @@ typedef struct __s390_jmp_buf
   /* We save fpu registers 4 and 6.  */
   long __fpregs[4];
 # endif
+#ifndef __V1_JMPBUF
+  unsigned long __flags;
+  char __reserved[128];
+#endif
 } __jmp_buf[1];
 
 #endif
diff --git a/sysdeps/s390/longjmp.c b/sysdeps/s390/longjmp.c
new file mode 100644
index 0000000..c758d14
--- /dev/null
+++ b/sysdeps/s390/longjmp.c
@@ -0,0 +1,64 @@
+/* Copyright (C) 2013 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 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/>.
+
+   Versioned copy of sysdeps/generic/longjmp.c modified for extended
+   jmpbuf.  */
+
+#include <shlib-compat.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <signal.h>
+
+extern void __v2__longjmp (__jmp_buf __env, int __val)
+     __attribute__ ((__noreturn__));
+extern void __v2__libc_longjmp (sigjmp_buf env, int val)
+     __attribute__ ((__noreturn__));
+libc_hidden_proto (__v2__libc_longjmp)
+
+/* Set the signal mask to the one specified in ENV, and jump
+   to the position specified in ENV, causing the setjmp
+   call there to return VAL, or 1 if VAL is 0.  */
+void
+__v2__libc_siglongjmp (sigjmp_buf env, int val)
+{
+  /* Perform any cleanups needed by the frames being unwound.  */
+  _longjmp_unwind (env, val);
+
+  if (env[0].__mask_was_saved)
+    /* Restore the saved signal mask.  */
+    (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
+			  (sigset_t *) NULL);
+
+  /* Call the machine-dependent function to restore machine state.  */
+  __v2__longjmp (env[0].__jmpbuf, val ?: 1);
+}
+
+#ifndef __v2__longjmp
+strong_alias (__v2__libc_siglongjmp, __v2__libc_longjmp)
+libc_hidden_def (__v2__libc_longjmp)
+weak_alias (__v2__libc_siglongjmp, __v2_longjmp)
+weak_alias (__v2__libc_siglongjmp, __v2longjmp)
+weak_alias (__v2__libc_siglongjmp, __v2siglongjmp)
+
+/* These will be used by libpthread only.  */
+versioned_symbol (libc, __v2__libc_longjmp, __libc_longjmp, GLIBC_PRIVATE);
+versioned_symbol (libc, __v2__libc_siglongjmp, __libc_siglongjmp, GLIBC_PRIVATE);
+
+versioned_symbol (libc, __v2_longjmp, _longjmp, GLIBC_2_19);
+versioned_symbol (libc, __v2longjmp, longjmp, GLIBC_2_19);
+versioned_symbol (libc, __v2siglongjmp, siglongjmp, GLIBC_2_19);
+#endif /* ifndef __v2__longjmp */
diff --git a/sysdeps/s390/rtld-__longjmp.c b/sysdeps/s390/rtld-__longjmp.c
new file mode 100644
index 0000000..5e9f739
--- /dev/null
+++ b/sysdeps/s390/rtld-__longjmp.c
@@ -0,0 +1,19 @@
+/* Copyright (C) 2013 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 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/>.  */
+
+/* Build a non-versioned object for rtld-*.  */
+# include "__longjmp-common.c"
diff --git a/sysdeps/s390/rtld-setjmp.S b/sysdeps/s390/rtld-setjmp.S
new file mode 100644
index 0000000..4011011
--- /dev/null
+++ b/sysdeps/s390/rtld-setjmp.S
@@ -0,0 +1,20 @@
+/* Extendible version of setjmp for System z
+   Copyright (C) 2013 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 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/>.  */
+
+/* Build a non-versioned object for rtld-*.  */
+# include "setjmp-common.S"
diff --git a/sysdeps/s390/s390-32/__longjmp.c b/sysdeps/s390/s390-32/__longjmp-common.c
index 5d46e21..f78ef65 100644
--- a/sysdeps/s390/s390-32/__longjmp.c
+++ b/sysdeps/s390/s390-32/__longjmp-common.c
@@ -25,7 +25,7 @@
 
 /* Jump to the position specified by ENV, causing the
    setjmp call there to return VAL, or 1 if VAL is 0.  */
-void
+attribute_hidden void
 __longjmp (__jmp_buf env, int val)
 {
 #ifdef PTR_DEMANGLE
diff --git a/sysdeps/s390/s390-32/setjmp.S b/sysdeps/s390/s390-32/setjmp-common.S
index b8a0296..d7bb720 100644
--- a/sysdeps/s390/s390-32/setjmp.S
+++ b/sysdeps/s390/s390-32/setjmp-common.S
@@ -27,24 +27,24 @@
 ENTRY (setjmp)
 	.weak C_SYMBOL_NAME (setjmp)
 	lhi    %r3,1                /* second argument of one */
-	j      .Linternal_sigsetjmp /* branch relativ to __sigsetjmp */
+	j      0f                   /* branch relativ to __sigsetjmp */
 END (setjmp)
 
 	/* Binary compatibility entry point.  */
 ENTRY(_setjmp)
 	.weak  C_SYMBOL_NAME (_setjmp)
 	lhi    %r3,0                /* second argument of zero */
-	j      .Linternal_sigsetjmp /* branch relativ to __sigsetjmp */
+	j      0f                   /* branch relativ to __sigsetjmp */
 END (_setjmp)
 libc_hidden_def (_setjmp)
 
 ENTRY(__setjmp)
 	lhi    %r3,0                /* second argument of zero */
-	j      .Linternal_sigsetjmp /* branch relativ to __sigsetjmp */
+	j      0f                   /* branch relativ to __sigsetjmp */
 END (__setjmp)
 
 ENTRY(__sigsetjmp)
-.Linternal_sigsetjmp:
+0:
 #ifdef PTR_MANGLE
 	stm    %r6,%r13,0(%r2)      /* store registers in jmp_buf */
 	lr     %r4,%r14
@@ -55,6 +55,10 @@ ENTRY(__sigsetjmp)
 #else
 	stm    %r6,%r15,0(%r2)      /* store registers in jmp_buf */
 #endif
+#ifndef __V1_JMPBUF
+	lhi    %r4,0
+	st     %r4,56(%r2)         /* Set __flags to 0.  */
+#endif
 	std    %f4,40(%r2)
 	std    %f6,48(%r2)
 #if defined NOT_IN_libc && defined IS_IN_rtld
@@ -66,15 +70,15 @@ ENTRY(__sigsetjmp)
 	   we can't save and restore our caller's value.  Instead, we do an
 	   indirect jump through the GOT. */
 	basr   %r1,0
-.L0:    al     %r1,.L1 - .L0(0,%r1) /* get address of global offset table */
-				    /* get address of __sigjmp_save from got */
+0:      al     %r1,1f-0b(0,%r1) /* get address of global offset table */
+				/* get address of __sigjmp_save from got */
 	l      %r1,__sigjmp_save@GOT12(0,%r1)
 	br     %r1
-.L1:    .long  _GLOBAL_OFFSET_TABLE_ - .L0
+1:      .long  _GLOBAL_OFFSET_TABLE_ - 0b
 #else
 	basr   %r1,0
-.L0:    l      %r1,.L1-.L0(0,%r1)   /* load address of __sigjmp_save */
-	br     %r1                  /* tail-call __sigjmp_save */
-.L1:    .long  __sigjmp_save
+0:      l      %r1,1f-0b(0,%r1)   /* load address of __sigjmp_save */
+	br     %r1                /* tail-call __sigjmp_save */
+1:      .long  __sigjmp_save
 #endif
 END (__sigsetjmp)
diff --git a/sysdeps/s390/s390-64/__longjmp.c b/sysdeps/s390/s390-64/__longjmp-common.c
index 168ebf5..46cabb6 100644
--- a/sysdeps/s390/s390-64/__longjmp.c
+++ b/sysdeps/s390/s390-64/__longjmp-common.c
@@ -25,7 +25,7 @@
 
 /* Jump to the position specified by ENV, causing the
    setjmp call there to return VAL, or 1 if VAL is 0.  */
-void
+attribute_hidden void
 __longjmp (__jmp_buf env, int val)
 {
 #ifdef PTR_DEMANGLE
diff --git a/sysdeps/s390/s390-64/setjmp.S b/sysdeps/s390/s390-64/setjmp-common.S
index 5462dab..9cdcae4 100644
--- a/sysdeps/s390/s390-64/setjmp.S
+++ b/sysdeps/s390/s390-64/setjmp-common.S
@@ -27,24 +27,24 @@
 ENTRY (setjmp)
 	.weak C_SYMBOL_NAME (setjmp)
         lghi   %r3,1                /* Second argument of one.  */
-        j      .Linternal_sigsetjmp /* Branch relativ to __sigsetjmp.  */
+        j      0f                   /* Branch relativ to __sigsetjmp.  */
 END (setjmp)
 
 	/* Binary compatibility entry point.  */
 ENTRY(_setjmp)
         .weak  C_SYMBOL_NAME (_setjmp)
         slgr   %r3,%r3              /* Second argument of zero.  */
-        j      .Linternal_sigsetjmp /* Branch relativ to __sigsetjmp.  */
-END (setjmp)
+        j      0f                   /* Branch relativ to __sigsetjmp.  */
+END (_setjmp)
 libc_hidden_def (_setjmp)
 
 ENTRY(__setjmp)
         slgr   %r3,%r3              /* Second argument of zero.  */
-        j      .Linternal_sigsetjmp /* Branch relativ to __sigsetjmp.  */
-END (setjmp)
+        j      0f                   /* Branch relativ to __sigsetjmp.  */
+END (__setjmp)
 
 ENTRY(__sigsetjmp)
-.Linternal_sigsetjmp:
+0:
 #ifdef PTR_MANGLE
 	stmg   %r6,%r13,0(%r2)      /* Store registers in jmp_buf.  */
 	lgr    %r4,%r14
@@ -55,6 +55,10 @@ ENTRY(__sigsetjmp)
 #else
         stmg   %r6,%r15,0(%r2)      /* Store registers in jmp_buf.  */
 #endif
+#ifndef __V1_JMPBUF
+	lghi   %r4,0
+	stg    %r4,144(%r2)         /* Set __flags to 0.  */
+#endif
 	std    %f8,80(%r2)
 	std    %f9,88(%r2)
 	std    %f10,96(%r2)
diff --git a/sysdeps/s390/setjmp.S b/sysdeps/s390/setjmp.S
new file mode 100644
index 0000000..2ec621a
--- /dev/null
+++ b/sysdeps/s390/setjmp.S
@@ -0,0 +1,64 @@
+/* Extendible version of setjmp for System z
+   Copyright (C) 2013 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 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 <libc-symbols.h>
+#include <shlib-compat.h>
+
+versioned_symbol (libc, __v2setjmp, setjmp, GLIBC_2_19)
+versioned_symbol (libc, __v2_setjmp, _setjmp, GLIBC_2_19)
+versioned_symbol (libc, __v2__setjmp, __setjmp, GLIBC_2_19)
+versioned_symbol (libc, __v2__sigsetjmp, __sigsetjmp, GLIBC_2_19)
+#define setjmp __v2setjmp
+#define _setjmp __v2_setjmp
+#define __setjmp __v2__setjmp
+#define __sigsetjmp __v2__sigsetjmp
+#define __sigjmp_save __v2__sigjmp_save
+
+#include "setjmp-common.S"
+
+#undef setjmp
+#undef _setjmp
+#undef __setjmp
+#undef __sigsetjmp
+#undef __sigjmp_save
+libc_hidden_ver (__v2setjmp, setjmp)
+libc_hidden_ver (__v2_setjmp, _setjmp)
+libc_hidden_ver (__v2__setjmp, __setjmp)
+libc_hidden_ver (__v2__sigsetjmp, __sigsetjmp)
+
+#if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19)
+compat_symbol (libc, __v1setjmp, setjmp, GLIBC_2_0)
+compat_symbol (libc, __v1_setjmp, _setjmp, GLIBC_2_0)
+compat_symbol (libc, __v1__setjmp, __setjmp, GLIBC_2_0)
+compat_symbol (libc, __v1__sigsetjmp, __sigsetjmp, GLIBC_2_0)
+# define setjmp __v1setjmp
+# define _setjmp __v1_setjmp
+# define __setjmp __v1__setjmp
+# define __sigsetjmp __v1__sigsetjmp
+# define __sigjmp_save __v1__sigjmp_save
+# define __V1_JMPBUF
+
+# include "setjmp-common.S"
+
+# undef setjmp
+# undef _setjmp
+# undef __setjmp
+# undef __sigsetjmp
+# undef __sigjmp_save
+
+#endif /* if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19) */
diff --git a/sysdeps/s390/sigjmp.c b/sysdeps/s390/sigjmp.c
new file mode 100644
index 0000000..f7b5a6f
--- /dev/null
+++ b/sysdeps/s390/sigjmp.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 1992-2013 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 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 <stddef.h>
+#include <setjmp.h>
+#include <signal.h>
+
+/* This function is called by the `sigsetjmp' macro
+   before doing a `__setjmp' on ENV[0].__jmpbuf.
+   Always return zero.  */
+
+int
+__v2__sigjmp_save (sigjmp_buf env, int savemask)
+{
+  env[0].__mask_was_saved = (savemask &&
+			     __sigprocmask (SIG_BLOCK, (sigset_t *) NULL,
+					    &env[0].__saved_mask) == 0);
+
+  return 0;
+}
diff --git a/sysdeps/s390/v1-longjmp.c b/sysdeps/s390/v1-longjmp.c
new file mode 100644
index 0000000..82252c9
--- /dev/null
+++ b/sysdeps/s390/v1-longjmp.c
@@ -0,0 +1,57 @@
+/* Copyright (C) 2013 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 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/>.
+
+   Versioned copy of sysdeps/generic/longjmp.c modified for extended
+   jmpbuf.  */
+
+#include <shlib-compat.h>
+#include <stddef.h>
+#include <signal.h>
+#include "v1-setjmp.h"
+
+#if !defined NOT_INT_libc && defined SHARED
+# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19)
+
+void
+__v1__libc_siglongjmp (__v1__sigjmp_buf env, int val)
+{
+  /* Perform any cleanups needed by the frames being unwound.  */
+  _longjmp_unwind (env, val);
+
+  if (env[0].__mask_was_saved)
+    /* Restore the saved signal mask.  */
+    (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
+			  (sigset_t *) NULL);
+
+  /* Call the machine-dependent function to restore machine state.  */
+  __v1__longjmp (env[0].__jmpbuf, val ?: 1);
+}
+
+#  ifndef __v1__longjmp
+strong_alias (__v1__libc_siglongjmp, __v1__libc_longjmp)
+libc_hidden_def (__v1__libc_longjmp)
+weak_alias (__v1__libc_siglongjmp, __v1_longjmp)
+weak_alias (__v1__libc_siglongjmp, __v1longjmp)
+weak_alias (__v1__libc_siglongjmp, __v1siglongjmp)
+
+compat_symbol (libc, __v1_longjmp, _longjmp, GLIBC_2_0);
+compat_symbol (libc, __v1longjmp, longjmp, GLIBC_2_0);
+compat_symbol (libc, __v1siglongjmp, siglongjmp, GLIBC_2_0);
+
+#  endif /* ifndef __v1__longjmp */
+# endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19) */
+#endif /* if !defined NOT_INT_libc && defined SHARED */
diff --git a/sysdeps/s390/v1-setjmp.h b/sysdeps/s390/v1-setjmp.h
new file mode 100644
index 0000000..a4a6b76
--- /dev/null
+++ b/sysdeps/s390/v1-setjmp.h
@@ -0,0 +1,111 @@
+/* Copyright (C) 1991-2013 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 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/>.  */
+
+/*
+ *	ISO C99 Standard: 7.13 Nonlocal jumps	<setjmp.h>
+ */
+
+#ifndef	_V1_SETJMP_H
+#define	_V1_SETJMP_H	1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+#define __V1_JMPBUF
+#define _SETJMP_H
+#include <bits/setjmp.h>		/* Get `__jmp_buf'.  */
+
+#ifndef _ASM
+
+#include <bits/sigset.h>		/* Get `__sigset_t'.  */
+
+
+/* Calling environment, plus possibly a saved signal mask.  */
+typedef struct __v1__jmp_buf_tag
+  {
+    /* NOTE: The machine-dependent definitions of `__sigsetjmp'
+       assume that a `jmp_buf' begins with a `__jmp_buf' and that
+       `__mask_was_saved' follows it.  Do not move these members
+       or add others before it.  */
+    __jmp_buf __jmpbuf;		/* Calling environment.  */
+    int __mask_was_saved;	/* Saved the signal mask?  */
+    __sigset_t __saved_mask;	/* Saved signal mask.  */
+  } __v1__jmp_buf[1];
+
+
+/* Store the calling environment in ENV, also saving the signal mask.
+   Return 0.  */
+extern int __v1setjmp (__v1__jmp_buf __env);
+
+/* Store the calling environment in ENV, also saving the
+   signal mask if SAVEMASK is nonzero.  Return 0.
+   This is the internal name for `sigsetjmp'.  */
+extern int __v1__sigsetjmp (struct __v1__jmp_buf_tag __env[1],
+			       int __savemask);
+
+/* Store the calling environment in ENV, not saving the signal mask.
+   Return 0.  */
+extern int __v1_setjmp (struct __v1__jmp_buf_tag __env[1]);
+
+/* Jump to the environment saved in ENV, making the
+   `setjmp' call there return VAL, or 1 if VAL is 0.  */
+extern void __v1longjmp (struct __v1__jmp_buf_tag __env[1], int __val)
+     __attribute__ ((__noreturn__));
+
+/* Same.  Usually `_longjmp' is used with `_setjmp', which does not save
+   the signal mask.  But it is how ENV was saved that determines whether
+   `longjmp' restores the mask; `_longjmp' is just an alias.  */
+extern void __v1_longjmp (struct __v1__jmp_buf_tag __env[1], int __val)
+     __attribute__ ((__noreturn__));
+
+/* Use the same type for `jmp_buf' and `sigjmp_buf'.
+   The `__mask_was_saved' flag determines whether
+   or not `longjmp' will restore the signal mask.  */
+typedef struct __v1__jmp_buf_tag __v1__sigjmp_buf[1];
+
+/* Jump to the environment saved in ENV, making the
+   sigsetjmp call there return VAL, or 1 if VAL is 0.
+   Restore the signal mask if that sigsetjmp call saved it.
+   This is just an alias `longjmp'.  */
+extern void __v1siglongjmp (__v1__sigjmp_buf __env, int __val)
+     __attribute__ ((__noreturn__));
+
+/* Internal machine-dependent function to restore context sans signal mask.  */
+extern void __v1__longjmp (__jmp_buf __env, int __val)
+     __attribute__ ((__noreturn__));
+
+/* Internal function to possibly save the current mask of blocked signals
+   in ENV, and always set the flag saying whether or not it was saved.
+   This is used by the machine-dependent definition of `__sigsetjmp'.
+   Always returns zero, for convenience.  */
+extern int __v1__sigjmp_save (__v1__jmp_buf __env, int __savemask);
+
+extern void _longjmp_unwind (__v1__jmp_buf env, int val);
+
+extern void __v1__libc_siglongjmp (__v1__sigjmp_buf env, int val)
+          __attribute__ ((noreturn));
+
+extern void __v1__libc_longjmp (__v1__sigjmp_buf env, int val)
+     __attribute__ ((noreturn));
+
+libc_hidden_proto (__v1__libc_longjmp)
+libc_hidden_proto (__v1_setjmp)
+libc_hidden_proto (__v1__sigsetjmp)
+#endif /* !_ASM */
+
+#endif /* ifndef _V1_SETJMP_H */
diff --git a/sysdeps/s390/v1-sigjmp.c b/sysdeps/s390/v1-sigjmp.c
new file mode 100644
index 0000000..b624d16
--- /dev/null
+++ b/sysdeps/s390/v1-sigjmp.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 1992-2013 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 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/>.
+
+   Copied from setjmp/sigjmp.c for extending jmp_buf.  */
+
+#include <bits/wordsize.h>
+#include <shlib-compat.h>
+
+#if !defined NOT_IN_libc && defined SHARED
+# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19)
+#  include <stddef.h>
+#  include <v1-setjmp.h>
+#  include <signal.h>
+
+/* This function is called by the `sigsetjmp' macro
+   before doing a `__setjmp' on ENV[0].__jmpbuf.
+   Always return zero.  */
+
+int
+__v1__sigjmp_save (__v1__sigjmp_buf env, int savemask)
+{
+  env[0].__mask_was_saved = (savemask &&
+			     __sigprocmask (SIG_BLOCK, (sigset_t *) NULL,
+					    &env[0].__saved_mask) == 0);
+
+  return 0;
+}
+
+# endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_19) */
+#endif /* !NOT_IN_libc && SHARED  */