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authorUlrich Drepper <drepper@redhat.com>2009-05-29 11:58:04 -0700
committerUlrich Drepper <drepper@redhat.com>2009-05-29 11:58:04 -0700
commitb8bb339f7d684654295aca2dedb69c2c069a7cab (patch)
tree18c54d5172896c4b72a70160e10bae9b807f85d9
parent1de0c16183cf5f485ad44b6e5300844ec961b225 (diff)
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Implement longjmp checking for s390.
-rw-r--r--ChangeLog8
-rw-r--r--sysdeps/s390/s390-32/____longjmp_chk.c41
-rw-r--r--sysdeps/s390/s390-32/__longjmp.c7
-rw-r--r--sysdeps/s390/s390-64/____longjmp_chk.c41
-rw-r--r--sysdeps/s390/s390-64/__longjmp.c7
5 files changed, 102 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index bc80958128..99ff1e390b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-05-29 Jakub Jelinek <jakub@redhat.com>
+
+ * sysdeps/s390/s390-32/__longjmp.c (__longjmp): If CHECK_SP is
+ defined, use it.
+ * sysdeps/s390/s390-64/__longjmp.c (__longjmp): Likewise.
+ * sysdeps/s390/s390-32/____longjmp_chk.c: New file.
+ * sysdeps/s390/s390-64/____longjmp_chk.c: New file.
+
2009-05-29 Ulrich Drepper <drepper@redhat.com>
* sysdeps/x86_64/cacheinfo.c: Compact intel_02_known array. Adjust
diff --git a/sysdeps/s390/s390-32/____longjmp_chk.c b/sysdeps/s390/s390-32/____longjmp_chk.c
new file mode 100644
index 0000000000..c5eb721e0e
--- /dev/null
+++ b/sysdeps/s390/s390-32/____longjmp_chk.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jakub Jelinek <jakub@redhat.com>.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <setjmp.h>
+#include <bits/setjmp.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#define __longjmp ____longjmp_chk
+
+#define CHECK_SP(env, guard) \
+ do \
+ { \
+ uintptr_t cur_sp; \
+ uintptr_t new_sp = env->__gregs[9]; \
+ __asm ("lr %0, %%r15" : "=r" (cur_sp)); \
+ new_sp ^= guard; \
+ if (new_sp < cur_sp) \
+ __fortify_fail ("longjmp causes uninitialized stack frame"); \
+ } while (0)
+
+#include "__longjmp.c"
diff --git a/sysdeps/s390/s390-32/__longjmp.c b/sysdeps/s390/s390-32/__longjmp.c
index c47ebbc52a..4abc0ec81c 100644
--- a/sysdeps/s390/s390-32/__longjmp.c
+++ b/sysdeps/s390/s390-32/__longjmp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000, 2001, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2001, 2005, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
@@ -33,6 +33,11 @@ __longjmp (__jmp_buf env, int val)
#ifdef PTR_DEMANGLE
register uintptr_t r3 __asm ("%r3") = THREAD_GET_POINTER_GUARD ();
register void *r1 __asm ("%r1") = (void *) env;
+# ifdef CHECK_SP
+ CHECK_SP (env, r3);
+# endif
+#elif defined CHECK_SP
+ CHECK_SP (env, 0);
#endif
/* Restore registers and jump back. */
asm volatile ("ld %%f6,48(%1)\n\t"
diff --git a/sysdeps/s390/s390-64/____longjmp_chk.c b/sysdeps/s390/s390-64/____longjmp_chk.c
new file mode 100644
index 0000000000..241822ce4a
--- /dev/null
+++ b/sysdeps/s390/s390-64/____longjmp_chk.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jakub Jelinek <jakub@redhat.com>.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <setjmp.h>
+#include <bits/setjmp.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#define __longjmp ____longjmp_chk
+
+#define CHECK_SP(env, guard) \
+ do \
+ { \
+ uintptr_t cur_sp; \
+ uintptr_t new_sp = env->__gregs[9]; \
+ __asm ("lgr %0, %%r15" : "=r" (cur_sp)); \
+ new_sp ^= guard; \
+ if (new_sp < cur_sp) \
+ __fortify_fail ("longjmp causes uninitialized stack frame"); \
+ } while (0)
+
+#include "__longjmp.c"
diff --git a/sysdeps/s390/s390-64/__longjmp.c b/sysdeps/s390/s390-64/__longjmp.c
index 030fb5b515..445bd3baf3 100644
--- a/sysdeps/s390/s390-64/__longjmp.c
+++ b/sysdeps/s390/s390-64/__longjmp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2005, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
@@ -33,6 +33,11 @@ __longjmp (__jmp_buf env, int val)
#ifdef PTR_DEMANGLE
register uintptr_t r3 __asm ("%r3") = THREAD_GET_POINTER_GUARD ();
register void *r1 __asm ("%r1") = (void *) env;
+# ifdef CHECK_SP
+ CHECK_SP (env, r3);
+# endif
+#elif defined CHECK_SP
+ CHECK_SP (env, 0);
#endif
/* Restore registers and jump back. */
asm volatile ("ld %%f7,104(%1)\n\t"