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>
---
 misc/unwind-link.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'misc')

diff --git a/misc/unwind-link.c b/misc/unwind-link.c
index 9ae9561206..45b7886b46 100644
--- a/misc/unwind-link.c
+++ b/misc/unwind-link.c
@@ -23,6 +23,7 @@
 #include <gnu/lib-names.h>
 #include <unwind-link.h>
 #include <libc-lock.h>
+#include <pointer_guard.h>
 
 /* Statically allocate the object, so that we do not have to deal with
    malloc failure.  __libc_unwind_link_get must not fail if libgcc_s
-- 
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