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Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h')
-rw-r--r--sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h28
1 files changed, 25 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
index 43b1b951d5..355108a493 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
@@ -1,4 +1,5 @@
-/* Copyright (C) 2000,01,02,03,04 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of the GNU C Library.
@@ -23,6 +24,7 @@
#include <sysdeps/s390/s390-32/sysdep.h>
#include <sysdeps/unix/sysdep.h>
#include <dl-sysdep.h> /* For RTLD_PRIVATE_ERRNO. */
+#include <tls.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
@@ -111,8 +113,8 @@
0: lcr %r0,%r2; \
basr %r1,0; \
1: al %r1,2f-1b(%r1); \
- l %r1,SYSCALL_ERROR_ERRNO@gotntpoff(%r1) \
- ear %r2,%a0 \
+ l %r1,SYSCALL_ERROR_ERRNO@gotntpoff(%r1); \
+ ear %r2,%a0; \
st %r0,0(%r1,%r2); \
lhi %r2,-1; \
br %r14; \
@@ -261,4 +263,24 @@
#define ASMFMT_4 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5)
#define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6)
+
+/* Pointer mangling support. */
+#if defined NOT_IN_libc && defined IS_IN_rtld
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+ earlier than the descriptor is initialized. */
+#else
+/* For the time being just use stack_guard rather than a separate
+ pointer_guard. */
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE(reg, tmpreg) \
+ ear tmpreg,%a0; \
+ x reg,STACK_GUARD(tmpreg)
+# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
+# else
+# define PTR_MANGLE(var) \
+ (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
+
#endif /* _LINUX_S390_SYSDEP_H */