diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2006-01-30 09:30:09 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2006-01-30 09:30:09 +0000 |
| commit | 3e543bc56346540cbf73fd48d0172fc6a588efd5 (patch) | |
| tree | b2c3502b6596d238ac861cc82cafdc6f8b84e143 /sysdeps/unix/alpha/sysdep.h | |
| parent | 06f313e361a523605ba6d4c9cdc67a7353cd367c (diff) | |
Updated to fedora-glibc-20060130T0922
Diffstat (limited to 'sysdeps/unix/alpha/sysdep.h')
| -rw-r--r-- | sysdeps/unix/alpha/sysdep.h | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/sysdeps/unix/alpha/sysdep.h b/sysdeps/unix/alpha/sysdep.h index a154db8e41..2260ec5480 100644 --- a/sysdeps/unix/alpha/sysdep.h +++ b/sysdeps/unix/alpha/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1992, 1995, 1996, 2000, 2003, 2004 +/* Copyright (C) 1992, 1995, 1996, 2000, 2003, 2004, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Brendan Kehoe (brendan@zen.org). @@ -397,4 +397,42 @@ __LABEL(name) \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } +/* Pointer mangling support. Note that tls access is slow enough that + we don't deoptimize things by placing the pointer check value there. */ + +#include <stdint.h> + +#if defined NOT_IN_libc && defined IS_IN_rtld +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(dst, src, tmp) \ + ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \ + ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \ + xor src, tmp, dst +# define PTR_MANGLE2(dst, src, tmp) \ + xor src, tmp, dst +# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp) +# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp) +# else +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden; +# define PTR_MANGLE(var) \ + (var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard_local) +# define PTR_DEMANGLE(var) PTR_MANGLE(var) +# endif +#elif defined PIC +# ifdef __ASSEMBLER__ +# define PTR_MANGLE(dst, src, tmp) \ + ldq tmp, __pointer_chk_guard; \ + xor src, tmp, dst +# define PTR_MANGLE2(dst, src, tmp) \ + xor src, tmp, dst +# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp) +# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp) +# else +extern uintptr_t __pointer_chk_guard attribute_relro; +# define PTR_MANGLE(var) \ + (var) = (void *) ((uintptr_t) (var) ^ __pointer_chk_guard) +# define PTR_DEMANGLE(var) PTR_MANGLE(var) +# endif +#endif + #endif /* ASSEMBLER */ |