* sysdeps/unix/sysv/linux/x86_64/sysdep.h (PTR_MANGLE): Define C

version for inside ld.so. * elf/rtld.c (dl_main): Don't use hp timing code unless it's available.
git-mirror · Dec 18, 2005 · 7725f87 · 7725f87
1 parent d87921e
commit 7725f87
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Showing 3 changed files with 12 additions and 3 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -1,5 +1,10 @@
 2005-12-18  Ulrich Drepper  <drepper@redhat.com>
 
+	* sysdeps/unix/sysv/linux/x86_64/sysdep.h (PTR_MANGLE): Define C
+	version for inside ld.so.
+
+	* elf/rtld.c (dl_main): Don't use hp timing code unless it's available.
+
 	* sysdeps/powerpc/powerpc32/setjmp-common.S [IS_IN_rtld]: Avoid
 	call to __sigjmp_save.
 	* sysdeps/powerpc/powerpc64/setjmp-common.S: Likewise.

diff --git a/elf/rtld.c b/elf/rtld.c
@@ -1837,10 +1837,12 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
   if (GLRO(dl_pointer_guard))
     {
       // XXX If it is cheap, we should use a separate value.
-      uintptr_t pointer_chk_guard;
+      uintptr_t pointer_chk_guard = stack_chk_guard;
+#ifndef HP_TIMING_NONAVAIL
       hp_timing_t now;
       HP_TIMING_NOW (now);
-      pointer_chk_guard = stack_chk_guard ^ now;
+      pointer_chk_guard ^= now;
+#endif
 #ifdef THREAD_SET_POINTER_GUARD
       THREAD_SET_POINTER_GUARD (pointer_chk_guard);
 #endif

diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
@@ -320,7 +320,9 @@
 #  define PTR_MANGLE(reg)	xorq __pointer_chk_guard_local(%rip), reg
 #  define PTR_DEMANGLE(reg)	PTR_MANGLE (reg)
 # else
-#  error "Define these if necessary"
+#  define PTR_MANGLE(reg)	asm ("xorq __pointer_chk_guard_local(%%rip), %0"\
+				     : "=r" (reg) : "0" (reg))
+#  define PTR_DEMANGLE(reg)	PTR_MANGLE (reg)
 # endif
 #else
 # ifdef __ASSEMBLER__