Submitted By: Joe Ciccone Date: 2007-12-21 Initial Package Version: 2.7 Upstream Status: Reported Origin: http://sources.redhat.com/bugzilla/show_bug.cgi?id=5216 Description: Moves and fixes the PTR_MANGLE definitions. --- glibc-2.7.orig/sysdeps/unix/alpha/sysdep.h +++ glibc-2.7/sysdeps/unix/alpha/sysdep.h @@ -397,42 +397,4 @@ _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 - -#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) = (__typeof (var)) ((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 */ --- glibc-2.7.orig/sysdeps/unix/sysv/linux/alpha/sysdep.h +++ glibc-2.7/sysdeps/unix/sysv/linux/alpha/sysdep.h @@ -98,4 +98,46 @@ 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) = (__typeof (var)) ((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 +#else +/* Pointer mangling is not yet supported for static libc on alpha. */ +# ifndef __ASSEMBLER__ +# define PTR_MANGLE(var) (void) (var) +# define PTR_DEMANGLE(var) (void) (var) +# endif +#endif + #endif /* _LINUX_ALPHA_SYSDEP_H */