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| author | Ulrich Drepper <drepper@redhat.com> | 2006-01-13 22:11:19 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2006-01-13 22:11:19 +0000 |
| commit | 9adacd8ac9421781c5c76d6826cc06a3a2eeb426 (patch) | |
| tree | aca9c270a38b30da1a0bf164af12efc3e756969d /sysdeps/unix/alpha/sysdep.h | |
| parent | 251278c63fb33caa77201a5710d118165e9dd7ab (diff) | |
| download | glibc-9adacd8ac9421781c5c76d6826cc06a3a2eeb426.tar.gz glibc-9adacd8ac9421781c5c76d6826cc06a3a2eeb426.tar.xz glibc-9adacd8ac9421781c5c76d6826cc06a3a2eeb426.zip | |
..
2006-01-13 Richard Henderson <rth@redhat.com> * sysdeps/unix/sysv/linux/alpha/sysdep.h (PTR_MANGLE, PTR_MANGLE2, PTR_DEMANGLE, PTR_DEMANGLE2): Move ... * sysdeps/unix/alpha/sysdep.h: ... here. * sysdeps/unix/sysv/linux/alpha/fxstatat.c: Define __GI___fxstatat64.
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 */ |