diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h index 154bc06803..562fc7df76 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h @@ -1,5 +1,5 @@ /* Assembler macros for 64 bit S/390. - Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 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. @@ -24,6 +24,7 @@ #include <sysdeps/s390/s390-64/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 @@ -263,4 +264,25 @@ #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; \ + sllg tmpreg,tmpreg,32; \ + ear tmpreg,%a1; \ + xg 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 */ |