From d9266ea02f482e39904260d5add5d68c4508de38 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 11 Jan 2006 22:18:24 +0000 Subject: * Makerules: Define build-module-asneeded. * iconvdata/extra-module.mk: Use build-module-asneeded. needed. 2006-01-09 Richard Henderson * iconvdata/extra-module.mk ($(objpfx)$(mod).so): Depend on ld.so. * sysdeps/alpha/__longjmp.S: Use PTR_DEMANGLE. * sysdeps/alpha/setjmp.S: Likewise. Avoid __sigjmp_save for rtld; tailcall in libc.so. * sysdeps/unix/sysv/linux/alpha/sysdep.h (PTR_MANGLE): Define. (PTR_MANGLE2): Define. 2006-01-11 Ulrich Drepper --- sysdeps/unix/sysv/linux/alpha/sysdep.h | 39 ++++++++++++++++++++++++++++++++-- 1 file changed, 37 insertions(+), 2 deletions(-) (limited to 'sysdeps/unix/sysv/linux') diff --git a/sysdeps/unix/sysv/linux/alpha/sysdep.h b/sysdeps/unix/sysv/linux/alpha/sysdep.h index c3de78f4bb..ccbce81f0d 100644 --- a/sysdeps/unix/sysv/linux/alpha/sysdep.h +++ b/sysdeps/unix/sysv/linux/alpha/sysdep.h @@ -22,10 +22,10 @@ #define _LINUX_ALPHA_SYSDEP_H 1 #ifdef __ASSEMBLER__ - #include #include - +#else +#include #endif /* There is some commonality. */ @@ -98,4 +98,39 @@ INTERNAL_SYSCALL1(name, err_out, nr, args); \ }) +/* Pointer mangling support. Note that tls access is slow enough that + we don't deoptimize things by placing the pointer check value there. */ +#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 /* _LINUX_ALPHA_SYSDEP_H */ -- cgit v1.2.3