[src/trunk]: src/libexec/ld.elf_so HPPA hack for a problem where gdb doesn't ...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e02a2016f4fa
branches:  trunk
changeset: 336538:e02a2016f4fa
user:      skrll <skrll%NetBSD.org@localhost>
date:      Thu Mar 05 09:49:53 2015 +0000

description:
HPPA hack for a problem where gdb doesn't see _rtld_debug_state when
it's a single bv,n %r0(%rp) instruction.

The nullify confuses something.

diffstat:

 libexec/ld.elf_so/rtld.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r 04aa8151189e -r e02a2016f4fa libexec/ld.elf_so/rtld.c
--- a/libexec/ld.elf_so/rtld.c  Thu Mar 05 08:09:44 2015 +0000
+++ b/libexec/ld.elf_so/rtld.c  Thu Mar 05 09:49:53 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtld.c,v 1.174 2014/08/25 20:40:52 joerg Exp $  */
+/*     $NetBSD: rtld.c,v 1.175 2015/03/05 09:49:53 skrll Exp $  */
 
 /*
  * Copyright 1996 John D. Polstra.
@@ -40,7 +40,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__RCSID("$NetBSD: rtld.c,v 1.174 2014/08/25 20:40:52 joerg Exp $");
+__RCSID("$NetBSD: rtld.c,v 1.175 2015/03/05 09:49:53 skrll Exp $");
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -1431,6 +1431,9 @@
 void
 _rtld_debug_state(void)
 {
+#if defined(__hppa__)
+       __asm volatile("nop" ::: "memory");
+#endif
 
        /* Prevent optimizer from removing calls to this function */
        __insn_barrier();