(PTR_MANGLE): Define.

(PTR_MANGLE2): Define.

diff --git a/sysdeps/unix/sysv/linux/alpha/sysdep.h b/sysdeps/unix/sysv/linux/alpha/sysdep.h
index c3de78f..ccbce81 100644 (file)
--- 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 <asm/pal.h>
 #include <alpha/regdef.h>
-
+#else
+#include <stdint.h>
 #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 */