From 88f4b6929c26f9240a4b0b7dcc62922f02544a09 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 18 Oct 2022 17:00:07 +0200
Subject: Introduce <pointer_guard.h>, extracted from <sysdep.h>

This allows us to define a generic no-op version of PTR_MANGLE and
PTR_DEMANGLE.  In the future, we can use PTR_MANGLE and PTR_DEMANGLE
unconditionally in C sources, avoiding an unintended loss of hardening
due to missing include files or unlucky header inclusion ordering.

In i386 and x86_64, we can avoid a <tls.h> dependency in the C
code by using the computed constant from <tcb-offsets.h>.  <sysdep.h>
no longer includes these definitions, so there is no cyclic dependency
anymore when computing the <tcb-offsets.h> constants.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 nss/nss_module.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'nss')

diff --git a/nss/nss_module.c b/nss/nss_module.c
index f00bbd9e1a..9a8f3ddf94 100644
--- a/nss/nss_module.c
+++ b/nss/nss_module.c
@@ -32,7 +32,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sysdep.h>
+#include <pointer_guard.h>
 
 /* Suffix after .so of NSS service modules.  This is a bit of magic,
    but we assume LIBNSS_FILES_SO looks like "libnss_files.so.2" and we
-- 
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