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authorFlorian Weimer <fweimer@redhat.com>2022-10-18 17:00:07 +0200
committerFlorian Weimer <fweimer@redhat.com>2022-10-18 17:03:55 +0200
commit88f4b6929c26f9240a4b0b7dcc62922f02544a09 (patch)
tree72acb4a359d3ec56729a910386bd1a002bd69e3c /hurd
parent246f37d6b1c4c6c0a6365df8783e62e3adf208e8 (diff)
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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>
Diffstat (limited to 'hurd')
-rw-r--r--hurd/sigunwind.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hurd/sigunwind.c b/hurd/sigunwind.c
index de76cf2436..28213091e3 100644
--- a/hurd/sigunwind.c
+++ b/hurd/sigunwind.c
@@ -22,7 +22,7 @@
 #include <jmpbuf-unwind.h>
 #include <assert.h>
 #include <stdint.h>
-
+#include <pointer_guard.h>
 
 /* _hurd_setup_sighandler puts a link on the `active resources' chain so that
    _longjmp_unwind will call this function with the `struct sigcontext *'