From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org, Florian Weimer <fweimer@redhat.com>,
DJ Delorie <dj@redhat.com>
Subject: Re: [PATCH 2/3] Introduce <pointer_guard.h>, extracted from <sysdep.h>
Date: Mon, 17 Oct 2022 13:13:10 -0300 [thread overview]
Message-ID: <ca54bf5d-1846-5710-ff72-90f7093f1083@linaro.org> (raw)
In-Reply-To: <b3948e223c8d9a6ba652b85f70f3ae9e89516b3b.1665663395.git.fweimer@redhat.com>
On 13/10/22 09:20, Florian Weimer via Libc-alpha wrote:
> 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.
Could we also improve the generic implementation to always XOR with the
pointer guard and move it to be a proper static inline function? I think
we can then remove a lot of boilerplate code each architecture need to
have.
>
> 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.
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> hurd/sigunwind.c | 2 +-
> iconv/gconv.c | 2 +-
> iconv/gconv_cache.c | 1 +
> iconv/gconv_db.c | 2 +-
> iconv/gconv_dl.c | 2 +-
> iconv/gconv_trans.c | 1 +
> iconv/skeleton.c | 2 +-
> inet/idna.c | 1 +
> libio/iofopncook.c | 1 +
> libio/iofwide.c | 2 +-
> libio/libioP.h | 1 +
> libio/vtables.c | 1 +
> misc/unwind-link.c | 1 +
> nss/nss_module.c | 2 +-
> stdlib/cxa_atexit.c | 2 +-
> stdlib/cxa_finalize.c | 2 +-
> stdlib/cxa_thread_atexit_impl.c | 1 +
> stdlib/exit.c | 2 +-
> stdlib/on_exit.c | 2 +-
> sysdeps/aarch64/__longjmp.S | 1 +
> sysdeps/aarch64/jmpbuf-offsets.h | 1 +
> sysdeps/aarch64/setjmp.S | 1 +
> sysdeps/alpha/__longjmp.S | 1 +
> sysdeps/alpha/jmpbuf-unwind.h | 1 +
> sysdeps/alpha/setjmp.S | 1 +
> sysdeps/arc/jmpbuf-unwind.h | 1 +
> sysdeps/arm/__longjmp.S | 1 +
> sysdeps/arm/jmpbuf-unwind.h | 1 +
> sysdeps/arm/pointer_guard.h | 67 +++++++++++++++
> sysdeps/arm/setjmp.S | 1 +
> sysdeps/arm/sysdep.h | 44 ----------
> sysdeps/csky/abiv2/__longjmp.S | 1 +
> sysdeps/csky/abiv2/setjmp.S | 1 +
> sysdeps/csky/jmpbuf-unwind.h | 1 +
> sysdeps/generic/pointer_guard.h | 29 +++++++
> sysdeps/generic/unwind-link.h | 2 +-
> sysdeps/i386/__longjmp.S | 1 +
> sysdeps/i386/bsd-_setjmp.S | 1 +
> sysdeps/i386/bsd-setjmp.S | 1 +
> sysdeps/i386/jmpbuf-unwind.h | 1 +
> sysdeps/i386/setjmp.S | 1 +
> sysdeps/loongarch/__longjmp.S | 1 +
> sysdeps/loongarch/jmpbuf-unwind.h | 1 +
> sysdeps/loongarch/setjmp.S | 1 +
> sysdeps/m68k/jmpbuf-unwind.h | 1 +
> sysdeps/mach/hurd/i386/____longjmp_chk.S | 1 +
> sysdeps/mach/hurd/i386/__longjmp.S | 1 +
> sysdeps/mach/hurd/jmp-unwind.c | 2 +-
> sysdeps/microblaze/jmpbuf-unwind.h | 1 +
> sysdeps/mips/jmpbuf-unwind.h | 1 +
> sysdeps/nios2/__longjmp.S | 1 +
> sysdeps/nios2/jmpbuf-offsets.h | 1 +
> sysdeps/nios2/setjmp.S | 1 +
> sysdeps/powerpc/jmpbuf-unwind.h | 1 +
> sysdeps/powerpc/powerpc32/__longjmp-common.S | 1 +
> .../powerpc/powerpc32/fpu/__longjmp-common.S | 1 +
> sysdeps/powerpc/powerpc32/fpu/setjmp-common.S | 1 +
> sysdeps/powerpc/powerpc32/setjmp-common.S | 1 +
> sysdeps/powerpc/powerpc64/__longjmp-common.S | 1 +
> sysdeps/powerpc/powerpc64/setjmp-common.S | 1 +
> sysdeps/riscv/jmpbuf-unwind.h | 1 +
> sysdeps/s390/jmpbuf-unwind.h | 1 +
> sysdeps/s390/s390-32/__longjmp.c | 1 +
> sysdeps/s390/s390-32/setjmp.S | 1 +
> sysdeps/s390/s390-64/__longjmp.c | 1 +
> sysdeps/s390/s390-64/setjmp.S | 1 +
> sysdeps/sh/jmpbuf-unwind.h | 1 +
> sysdeps/sh/sh3/__longjmp.S | 1 +
> sysdeps/sh/sh3/setjmp.S | 1 +
> sysdeps/sh/sh4/__longjmp.S | 1 +
> sysdeps/sh/sh4/setjmp.S | 1 +
> sysdeps/sparc/sparc32/__longjmp.S | 1 +
> sysdeps/sparc/sparc32/jmpbuf-unwind.h | 1 +
> sysdeps/sparc/sparc32/setjmp.S | 1 +
> .../unix/sysv/linux/aarch64/pointer_guard.h | 68 +++++++++++++++
> sysdeps/unix/sysv/linux/aarch64/sysdep.h | 45 ----------
> .../unix/sysv/linux/alpha/____longjmp_chk.S | 1 +
> sysdeps/unix/sysv/linux/alpha/pointer_guard.h | 62 ++++++++++++++
> sysdeps/unix/sysv/linux/alpha/sysdep.h | 40 ---------
> sysdeps/unix/sysv/linux/arc/sysdep.h | 4 -
> sysdeps/unix/sysv/linux/csky/pointer_guard.h | 68 +++++++++++++++
> sysdeps/unix/sysv/linux/csky/sysdep.h | 46 -----------
> sysdeps/unix/sysv/linux/hppa/sysdep.h | 4 -
> .../unix/sysv/linux/i386/____longjmp_chk.S | 1 +
> sysdeps/unix/sysv/linux/i386/pointer_guard.h | 49 +++++++++++
> sysdeps/unix/sysv/linux/i386/sysdep.h | 28 -------
> sysdeps/unix/sysv/linux/ia64/__ia64_longjmp.S | 1 +
> sysdeps/unix/sysv/linux/ia64/__longjmp.S | 1 +
> sysdeps/unix/sysv/linux/ia64/pointer_guard.h | 44 ++++++++++
> sysdeps/unix/sysv/linux/ia64/setjmp.S | 1 +
> sysdeps/unix/sysv/linux/ia64/sysdep.h | 20 -----
> .../unix/sysv/linux/loongarch/pointer_guard.h | 82 +++++++++++++++++++
> sysdeps/unix/sysv/linux/loongarch/sysdep.h | 60 --------------
> sysdeps/unix/sysv/linux/m68k/sysdep.h | 4 -
> sysdeps/unix/sysv/linux/microblaze/sysdep.h | 4 -
> sysdeps/unix/sysv/linux/mips/mips32/sysdep.h | 4 -
> sysdeps/unix/sysv/linux/mips/mips64/sysdep.h | 4 -
> sysdeps/unix/sysv/linux/nios2/pointer_guard.h | 40 +++++++++
> sysdeps/unix/sysv/linux/nios2/sysdep.h | 17 ----
> sysdeps/unix/sysv/linux/or1k/sysdep.h | 4 -
> .../unix/sysv/linux/powerpc/pointer_guard.h | 55 +++++++++++++
> sysdeps/unix/sysv/linux/powerpc/sysdep.h | 32 --------
> sysdeps/unix/sysv/linux/riscv/sysdep.h | 4 -
> .../sysv/linux/s390/s390-32/pointer_guard.h | 45 ++++++++++
> sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h | 21 -----
> .../sysv/linux/s390/s390-64/pointer_guard.h | 47 +++++++++++
> sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h | 23 ------
> sysdeps/unix/sysv/linux/sh/____longjmp_chk.S | 1 +
> sysdeps/unix/sysv/linux/sh/pointer_guard.h | 43 ++++++++++
> sysdeps/unix/sysv/linux/sh/sysdep.h | 19 -----
> .../linux/sparc/sparc32/____longjmp_chk.S | 1 +
> .../sysv/linux/sparc/sparc32/pointer_guard.h | 44 ++++++++++
> .../unix/sysv/linux/sparc/sparc32/sysdep.h | 20 -----
> .../sysv/linux/sparc/sparc64/pointer_guard.h | 44 ++++++++++
> .../unix/sysv/linux/sparc/sparc64/sysdep.h | 20 -----
> .../unix/sysv/linux/x86_64/____longjmp_chk.S | 1 +
> .../unix/sysv/linux/x86_64/pointer_guard.h | 61 ++++++++++++++
> sysdeps/unix/sysv/linux/x86_64/sysdep.h | 40 ---------
> sysdeps/x86_64/__longjmp.S | 1 +
> sysdeps/x86_64/jmpbuf-unwind.h | 1 +
> sysdeps/x86_64/setjmp.S | 1 +
> sysdeps/x86_64/x32/x86-lp_size.h | 2 +-
> wcsmbs/btowc.c | 2 +-
> wcsmbs/mbrtoc16.c | 2 +-
> wcsmbs/mbrtoc8.c | 2 -
> wcsmbs/mbrtowc.c | 2 +-
> wcsmbs/mbsnrtowcs.c | 2 +-
> wcsmbs/mbsrtowcs_l.c | 2 +-
> wcsmbs/wcrtomb.c | 2 +-
> wcsmbs/wcsnrtombs.c | 2 +-
> wcsmbs/wcsrtombs.c | 2 +-
> wcsmbs/wctob.c | 2 +-
> 132 files changed, 940 insertions(+), 532 deletions(-)
> create mode 100644 sysdeps/arm/pointer_guard.h
> create mode 100644 sysdeps/generic/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/aarch64/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/alpha/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/csky/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/i386/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/ia64/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/nios2/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/powerpc/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/s390/s390-32/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/s390/s390-64/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/sh/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/sparc/sparc64/pointer_guard.h
> create mode 100644 sysdeps/unix/sysv/linux/x86_64/pointer_guard.h
>
> 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 *'
> diff --git a/iconv/gconv.c b/iconv/gconv.c
> index 62d2b37bcd..dea9c80fee 100644
> --- a/iconv/gconv.c
> +++ b/iconv/gconv.c
> @@ -23,7 +23,7 @@
> #include <sys/param.h>
>
> #include <gconv_int.h>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> int
> diff --git a/iconv/gconv_cache.c b/iconv/gconv_cache.c
> index c772856d1f..5dbf596b8d 100644
> --- a/iconv/gconv_cache.c
> +++ b/iconv/gconv_cache.c
> @@ -28,6 +28,7 @@
> #include <gconv_int.h>
> #include <iconvconfig.h>
> #include <not-cancel.h>
> +#include <pointer_guard.h>
>
> #include "../intl/hash-string.h"
>
> diff --git a/iconv/gconv_db.c b/iconv/gconv_db.c
> index bf385ac7b1..90037fdf58 100644
> --- a/iconv/gconv_db.c
> +++ b/iconv/gconv_db.c
> @@ -27,7 +27,7 @@
>
> #include <dlfcn.h>
> #include <gconv_int.h>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> /* Simple data structure for alias mapping. We have two names, `from'
> diff --git a/iconv/gconv_dl.c b/iconv/gconv_dl.c
> index 24c0bd1d39..c93c5dd380 100644
> --- a/iconv/gconv_dl.c
> +++ b/iconv/gconv_dl.c
> @@ -26,7 +26,7 @@
> #include <sys/param.h>
>
> #include <gconv_int.h>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> #ifdef DEBUG
> diff --git a/iconv/gconv_trans.c b/iconv/gconv_trans.c
> index 1ebbbfd51b..0f4ce10996 100644
> --- a/iconv/gconv_trans.c
> +++ b/iconv/gconv_trans.c
> @@ -26,6 +26,7 @@
> #include <libc-lock.h>
> #include "gconv_int.h"
> #include "../locale/localeinfo.h"
> +#include <pointer_guard.h>
>
>
> int
> diff --git a/iconv/skeleton.c b/iconv/skeleton.c
> index 0356dbf92b..42ee0b6508 100644
> --- a/iconv/skeleton.c
> +++ b/iconv/skeleton.c
> @@ -147,7 +147,7 @@
> # include <dlfcn.h>
> #endif
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stdint.h>
>
> #ifndef DL_CALL_FCT
> diff --git a/inet/idna.c b/inet/idna.c
> index 9c76681c6a..df5811fd6a 100644
> --- a/inet/idna.c
> +++ b/inet/idna.c
> @@ -21,6 +21,7 @@
> #include <inet/net-internal.h>
> #include <netdb.h>
> #include <stdbool.h>
> +#include <pointer_guard.h>
>
> /* Use the soname and version to locate libidn2, to ensure a
> compatible ABI. */
> diff --git a/libio/iofopncook.c b/libio/iofopncook.c
> index e108ad2199..a7db4ef1c9 100644
> --- a/libio/iofopncook.c
> +++ b/libio/iofopncook.c
> @@ -28,6 +28,7 @@
> #include <stdio.h>
> #include <stdlib.h>
> #include <shlib-compat.h>
> +#include <pointer_guard.h>
>
> static ssize_t
> _IO_cookie_read (FILE *fp, void *buf, ssize_t size)
> diff --git a/libio/iofwide.c b/libio/iofwide.c
> index 01616e06c7..1ce685f48a 100644
> --- a/libio/iofwide.c
> +++ b/libio/iofwide.c
> @@ -36,7 +36,7 @@
> #include <wcsmbs/wcsmbsload.h>
> #include <iconv/gconv_int.h>
> #include <shlib-compat.h>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> /* Return orientation of stream. If mode is nonzero try to change
> diff --git a/libio/libioP.h b/libio/libioP.h
> index ba4fdbd200..dac3de73a1 100644
> --- a/libio/libioP.h
> +++ b/libio/libioP.h
> @@ -47,6 +47,7 @@
> #include "iolibio.h"
>
> #include <shlib-compat.h>
> +#include <pointer_guard.h>
>
> /* For historical reasons this is the name of the sysdeps header that
> adjusts the libio configuration. */
> diff --git a/libio/vtables.c b/libio/vtables.c
> index 50acab7f21..32459e4fac 100644
> --- a/libio/vtables.c
> +++ b/libio/vtables.c
> @@ -20,6 +20,7 @@
> #include <libioP.h>
> #include <stdio.h>
> #include <ldsodefs.h>
> +#include <pointer_guard.h>
>
> #ifdef SHARED
>
> 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
> 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
> diff --git a/stdlib/cxa_atexit.c b/stdlib/cxa_atexit.c
> index 1412dacb07..adf89e93f5 100644
> --- a/stdlib/cxa_atexit.c
> +++ b/stdlib/cxa_atexit.c
> @@ -21,7 +21,7 @@
>
> #include <libc-lock.h>
> #include "exit.h"
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #undef __cxa_atexit
>
> diff --git a/stdlib/cxa_finalize.c b/stdlib/cxa_finalize.c
> index d4db2e1fe0..f2479569a5 100644
> --- a/stdlib/cxa_finalize.c
> +++ b/stdlib/cxa_finalize.c
> @@ -19,7 +19,7 @@
> #include <stdlib.h>
> #include "exit.h"
> #include <register-atfork.h>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stdint.h>
>
> /* If D is non-NULL, call all functions registered with `__cxa_atexit'
> diff --git a/stdlib/cxa_thread_atexit_impl.c b/stdlib/cxa_thread_atexit_impl.c
> index 5cc8eb55dd..faacab3990 100644
> --- a/stdlib/cxa_thread_atexit_impl.c
> +++ b/stdlib/cxa_thread_atexit_impl.c
> @@ -75,6 +75,7 @@
> #include <stdio.h>
> #include <stdlib.h>
> #include <ldsodefs.h>
> +#include <pointer_guard.h>
>
> typedef void (*dtor_func) (void *);
>
> diff --git a/stdlib/exit.c b/stdlib/exit.c
> index bc46109f3e..e59156bbf6 100644
> --- a/stdlib/exit.c
> +++ b/stdlib/exit.c
> @@ -18,7 +18,7 @@
> #include <stdio.h>
> #include <stdlib.h>
> #include <unistd.h>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
> #include <libc-lock.h>
> #include "exit.h"
>
> diff --git a/stdlib/on_exit.c b/stdlib/on_exit.c
> index 3e2d640d65..fb59db20ca 100644
> --- a/stdlib/on_exit.c
> +++ b/stdlib/on_exit.c
> @@ -18,7 +18,7 @@
> #include <assert.h>
> #include <stdlib.h>
> #include "exit.h"
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Register a function to be called by exit. */
> int
> diff --git a/sysdeps/aarch64/__longjmp.S b/sysdeps/aarch64/__longjmp.S
> index 5f83f9f264..d934e00ec3 100644
> --- a/sysdeps/aarch64/__longjmp.S
> +++ b/sysdeps/aarch64/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <stap-probe.h>
>
> diff --git a/sysdeps/aarch64/jmpbuf-offsets.h b/sysdeps/aarch64/jmpbuf-offsets.h
> index 6256bda7a9..78bdd4a539 100644
> --- a/sysdeps/aarch64/jmpbuf-offsets.h
> +++ b/sysdeps/aarch64/jmpbuf-offsets.h
> @@ -43,6 +43,7 @@
> #include <setjmp.h>
> #include <stdint.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> static inline uintptr_t __attribute__ ((unused))
> _jmpbuf_sp (__jmp_buf jmpbuf)
> diff --git a/sysdeps/aarch64/setjmp.S b/sysdeps/aarch64/setjmp.S
> index 3860f4e0ec..2ed2feb488 100644
> --- a/sysdeps/aarch64/setjmp.S
> +++ b/sysdeps/aarch64/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <stap-probe.h>
>
> diff --git a/sysdeps/alpha/__longjmp.S b/sysdeps/alpha/__longjmp.S
> index ec7510bb55..aed7a17ed8 100644
> --- a/sysdeps/alpha/__longjmp.S
> +++ b/sysdeps/alpha/__longjmp.S
> @@ -18,6 +18,7 @@
> #define __ASSEMBLY__
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
>
> diff --git a/sysdeps/alpha/jmpbuf-unwind.h b/sysdeps/alpha/jmpbuf-unwind.h
> index 13b27990b3..318b73b100 100644
> --- a/sysdeps/alpha/jmpbuf-unwind.h
> +++ b/sysdeps/alpha/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame containing a local
> variable at ADDRESS. */
> diff --git a/sysdeps/alpha/setjmp.S b/sysdeps/alpha/setjmp.S
> index f86367ae08..deb888c072 100644
> --- a/sysdeps/alpha/setjmp.S
> +++ b/sysdeps/alpha/setjmp.S
> @@ -18,6 +18,7 @@
> #define __ASSEMBLY__
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
> .ent __sigsetjmp
> diff --git a/sysdeps/arc/jmpbuf-unwind.h b/sysdeps/arc/jmpbuf-unwind.h
> index 5488707919..e5434a95dd 100644
> --- a/sysdeps/arc/jmpbuf-unwind.h
> +++ b/sysdeps/arc/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <jmpbuf-offsets.h>
> #include <stdint.h>
> #include <unwind.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/arm/__longjmp.S b/sysdeps/arm/__longjmp.S
> index 5f1cf3643f..411055b9b3 100644
> --- a/sysdeps/arm/__longjmp.S
> +++ b/sysdeps/arm/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #include <bits/setjmp.h>
> #include <rtld-global-offsets.h>
> diff --git a/sysdeps/arm/jmpbuf-unwind.h b/sysdeps/arm/jmpbuf-unwind.h
> index e6b118f4d0..641444eaf3 100644
> --- a/sysdeps/arm/jmpbuf-unwind.h
> +++ b/sysdeps/arm/jmpbuf-unwind.h
> @@ -18,6 +18,7 @@
> #include <setjmp.h>
> #include <stdint.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <unwind.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
Ok.
> diff --git a/sysdeps/arm/pointer_guard.h b/sysdeps/arm/pointer_guard.h
> new file mode 100644
> index 0000000000..6b90cec2f3
> --- /dev/null
> +++ b/sysdeps/arm/pointer_guard.h
> @@ -0,0 +1,67 @@
> +/* Pointer guard implementation. Arm version.
> + Copyright (C) 2013-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +/* Pointer mangling support. */
> +#if (IS_IN (rtld) \
> + || (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE_LOAD(guard, tmp) \
> + LDR_HIDDEN (guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local), 0)
> +# define PTR_MANGLE(dst, src, guard, tmp) \
> + PTR_MANGLE_LOAD(guard, tmp); \
> + PTR_MANGLE2(dst, src, guard)
> +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> +# define PTR_MANGLE2(dst, src, guard) \
> + eor dst, src, guard
> +# define PTR_DEMANGLE(dst, src, guard, tmp) \
> + PTR_MANGLE (dst, src, guard, tmp)
> +# define PTR_DEMANGLE2(dst, src, guard) \
> + PTR_MANGLE2 (dst, src, guard)
> +# else
> +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE_LOAD(guard, tmp) \
> + LDR_GLOBAL (guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard), 0);
> +# define PTR_MANGLE(dst, src, guard, tmp) \
> + PTR_MANGLE_LOAD(guard, tmp); \
> + PTR_MANGLE2(dst, src, guard)
> +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> +# define PTR_MANGLE2(dst, src, guard) \
> + eor dst, src, guard
> +# define PTR_DEMANGLE(dst, src, guard, tmp) \
> + PTR_MANGLE (dst, src, guard, tmp)
> +# define PTR_DEMANGLE2(dst, src, guard) \
> + PTR_MANGLE2 (dst, src, guard)
> +# else
> +# include <stdint.h>
> +extern uintptr_t __pointer_chk_guard attribute_relro;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/arm/setjmp.S b/sysdeps/arm/setjmp.S
> index 1c26227437..271454d769 100644
> --- a/sysdeps/arm/setjmp.S
> +++ b/sysdeps/arm/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #include <bits/setjmp.h>
> #include <rtld-global-offsets.h>
> diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h
> index f19146b85f..ffd848de88 100644
> --- a/sysdeps/arm/sysdep.h
> +++ b/sysdeps/arm/sysdep.h
> @@ -293,47 +293,3 @@
> #else
> # define PC_OFS 8
> #endif
> -
> -/* Pointer mangling support. */
> -#if (IS_IN (rtld) \
> - || (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE_LOAD(guard, tmp) \
> - LDR_HIDDEN (guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local), 0)
> -# define PTR_MANGLE(dst, src, guard, tmp) \
> - PTR_MANGLE_LOAD(guard, tmp); \
> - PTR_MANGLE2(dst, src, guard)
> -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> -# define PTR_MANGLE2(dst, src, guard) \
> - eor dst, src, guard
> -# define PTR_DEMANGLE(dst, src, guard, tmp) \
> - PTR_MANGLE (dst, src, guard, tmp)
> -# define PTR_DEMANGLE2(dst, src, guard) \
> - PTR_MANGLE2 (dst, src, guard)
> -# else
> -extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE_LOAD(guard, tmp) \
> - LDR_GLOBAL (guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard), 0);
> -# define PTR_MANGLE(dst, src, guard, tmp) \
> - PTR_MANGLE_LOAD(guard, tmp); \
> - PTR_MANGLE2(dst, src, guard)
> -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> -# define PTR_MANGLE2(dst, src, guard) \
> - eor dst, src, guard
> -# define PTR_DEMANGLE(dst, src, guard, tmp) \
> - PTR_MANGLE (dst, src, guard, tmp)
> -# define PTR_DEMANGLE2(dst, src, guard) \
> - PTR_MANGLE2 (dst, src, guard)
> -# else
> -extern uintptr_t __pointer_chk_guard attribute_relro;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
Ok.
> diff --git a/sysdeps/csky/abiv2/__longjmp.S b/sysdeps/csky/abiv2/__longjmp.S
> index 762b2cb47f..bb7da548c2 100644
> --- a/sysdeps/csky/abiv2/__longjmp.S
> +++ b/sysdeps/csky/abiv2/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> ENTRY (__longjmp)
> mov a2, a0
> diff --git a/sysdeps/csky/abiv2/setjmp.S b/sysdeps/csky/abiv2/setjmp.S
> index 0acf197d02..afef3ce390 100644
> --- a/sysdeps/csky/abiv2/setjmp.S
> +++ b/sysdeps/csky/abiv2/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> ENTRY (setjmp)
> movi a1, 1
> diff --git a/sysdeps/csky/jmpbuf-unwind.h b/sysdeps/csky/jmpbuf-unwind.h
> index 358e912856..76fca431c6 100644
> --- a/sysdeps/csky/jmpbuf-unwind.h
> +++ b/sysdeps/csky/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/generic/pointer_guard.h b/sysdeps/generic/pointer_guard.h
> new file mode 100644
> index 0000000000..58a624e1d5
> --- /dev/null
> +++ b/sysdeps/generic/pointer_guard.h
> @@ -0,0 +1,29 @@
> +/* Pointer obfuscation implenentation. Generic (no-op) version.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +/* Assembler code depends on PTR_MANGLE not being defined for
> + optimization purposes. */
> +#ifndef __ASSEMBLER__
> +# define PTR_MANGLE(x) (void) (x)
> +# define PTR_DEMANGLE(x) (void) (x)
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok, I think we can improve to use an empty declaration if we really need to
(since the ideia is to eventually always have a generic implementation to
C code);
> diff --git a/sysdeps/generic/unwind-link.h b/sysdeps/generic/unwind-link.h
> index 93ee80f3f8..a2076a23bf 100644
> --- a/sysdeps/generic/unwind-link.h
> +++ b/sysdeps/generic/unwind-link.h
> @@ -31,7 +31,7 @@ unwind_arch_adjustment (void *prev, void *addr)
> #endif
>
> #ifdef SHARED
> -# include <sysdep.h>
> +# include <pointer_guard.h>
> # include <unwind-resume.h>
>
> # if UNWIND_LINK_FRAME_STATE_FOR
> diff --git a/sysdeps/i386/__longjmp.S b/sysdeps/i386/__longjmp.S
> index 508d370d5c..b67781ceb7 100644
> --- a/sysdeps/i386/__longjmp.S
> +++ b/sysdeps/i386/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/i386/bsd-_setjmp.S b/sysdeps/i386/bsd-_setjmp.S
> index 190e35b0c7..80399dba6e 100644
> --- a/sysdeps/i386/bsd-_setjmp.S
> +++ b/sysdeps/i386/bsd-_setjmp.S
> @@ -21,6 +21,7 @@
> in setjmp doesn't clobber the state restored by longjmp. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <stap-probe.h>
> diff --git a/sysdeps/i386/bsd-setjmp.S b/sysdeps/i386/bsd-setjmp.S
> index 575ac96208..b367bad85f 100644
> --- a/sysdeps/i386/bsd-setjmp.S
> +++ b/sysdeps/i386/bsd-setjmp.S
> @@ -21,6 +21,7 @@
> in setjmp doesn't clobber the state restored by longjmp. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <stap-probe.h>
> diff --git a/sysdeps/i386/jmpbuf-unwind.h b/sysdeps/i386/jmpbuf-unwind.h
> index 416c816b45..73d214fd31 100644
> --- a/sysdeps/i386/jmpbuf-unwind.h
> +++ b/sysdeps/i386/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/i386/setjmp.S b/sysdeps/i386/setjmp.S
> index 217efbdf8a..b528245806 100644
> --- a/sysdeps/i386/setjmp.S
> +++ b/sysdeps/i386/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S
> index d6a99fcbc8..4c40ffa158 100644
> --- a/sysdeps/loongarch/__longjmp.S
> +++ b/sysdeps/loongarch/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <sys/asm.h>
>
> ENTRY (__longjmp)
> diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h
> index 6fa509151d..458edec135 100644
> --- a/sysdeps/loongarch/jmpbuf-unwind.h
> +++ b/sysdeps/loongarch/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S
> index 9b1cdea48c..e5f480d453 100644
> --- a/sysdeps/loongarch/setjmp.S
> +++ b/sysdeps/loongarch/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <sys/asm.h>
>
> ENTRY (_setjmp)
> diff --git a/sysdeps/m68k/jmpbuf-unwind.h b/sysdeps/m68k/jmpbuf-unwind.h
> index 17e4b859ab..3ee46c050c 100644
> --- a/sysdeps/m68k/jmpbuf-unwind.h
> +++ b/sysdeps/m68k/jmpbuf-unwind.h
> @@ -19,6 +19,7 @@
> #include <setjmp.h>
> #include <stdint.h>
> #include <unwind.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/mach/hurd/i386/____longjmp_chk.S b/sysdeps/mach/hurd/i386/____longjmp_chk.S
> index 1a019e2e2b..81d297de0c 100644
> --- a/sysdeps/mach/hurd/i386/____longjmp_chk.S
> +++ b/sysdeps/mach/hurd/i386/____longjmp_chk.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <tcb-offsets.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/mach/hurd/i386/__longjmp.S b/sysdeps/mach/hurd/i386/__longjmp.S
> index 72fcc79f4b..22915fb21e 100644
> --- a/sysdeps/mach/hurd/i386/__longjmp.S
> +++ b/sysdeps/mach/hurd/i386/__longjmp.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <tcb-offsets.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/mach/hurd/jmp-unwind.c b/sysdeps/mach/hurd/jmp-unwind.c
> index f8938bc6f4..2577fbf3ee 100644
> --- a/sysdeps/mach/hurd/jmp-unwind.c
> +++ b/sysdeps/mach/hurd/jmp-unwind.c
> @@ -22,7 +22,7 @@
> #include <hurd/sigpreempt.h>
> #include <assert.h>
> #include <stdint.h>
> -
> +#include <pointer_guard.h>
>
> #ifndef _JMPBUF_UNWINDS
> #error "<jmpbuf-unwind.h> fails to define _JMPBUF_UNWINDS"
> diff --git a/sysdeps/microblaze/jmpbuf-unwind.h b/sysdeps/microblaze/jmpbuf-unwind.h
> index f23c7581a7..302e950ced 100644
> --- a/sysdeps/microblaze/jmpbuf-unwind.h
> +++ b/sysdeps/microblaze/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/mips/jmpbuf-unwind.h b/sysdeps/mips/jmpbuf-unwind.h
> index 813c24f3b1..28ecffedb0 100644
> --- a/sysdeps/mips/jmpbuf-unwind.h
> +++ b/sysdeps/mips/jmpbuf-unwind.h
> @@ -19,6 +19,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/nios2/__longjmp.S b/sysdeps/nios2/__longjmp.S
> index 214901d67d..13695e25a6 100644
> --- a/sysdeps/nios2/__longjmp.S
> +++ b/sysdeps/nios2/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
> /* __longjmp(jmpbuf, val) */
> diff --git a/sysdeps/nios2/jmpbuf-offsets.h b/sysdeps/nios2/jmpbuf-offsets.h
> index a13aa76c16..76fea64ffe 100644
> --- a/sysdeps/nios2/jmpbuf-offsets.h
> +++ b/sysdeps/nios2/jmpbuf-offsets.h
> @@ -32,6 +32,7 @@
> #include <setjmp.h>
> #include <stdint.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> static inline uintptr_t __attribute__ ((unused))
> _jmpbuf_sp (__jmp_buf jmpbuf)
> diff --git a/sysdeps/nios2/setjmp.S b/sysdeps/nios2/setjmp.S
> index 0aa5b23d4f..ec75108b87 100644
> --- a/sysdeps/nios2/setjmp.S
> +++ b/sysdeps/nios2/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
> .text
> diff --git a/sysdeps/powerpc/jmpbuf-unwind.h b/sysdeps/powerpc/jmpbuf-unwind.h
> index 706ceda5d4..93573ce238 100644
> --- a/sysdeps/powerpc/jmpbuf-unwind.h
> +++ b/sysdeps/powerpc/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/powerpc/powerpc32/__longjmp-common.S b/sysdeps/powerpc/powerpc32/__longjmp-common.S
> index 13ded200e2..0e0361e4fd 100644
> --- a/sysdeps/powerpc/powerpc32/__longjmp-common.S
> +++ b/sysdeps/powerpc/powerpc32/__longjmp-common.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #define _ASM
> #ifdef __NO_VMX__
> diff --git a/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S b/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S
> index e3937222a7..de04a62be2 100644
> --- a/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S
> +++ b/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #define _ASM
> #ifdef __NO_VMX__
> diff --git a/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S b/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S
> index f82196e6c2..1943ffd229 100644
> --- a/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S
> +++ b/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #define _ASM
> #ifdef __NO_VMX__
> diff --git a/sysdeps/powerpc/powerpc32/setjmp-common.S b/sysdeps/powerpc/powerpc32/setjmp-common.S
> index c632a3f8f2..281dd65f6a 100644
> --- a/sysdeps/powerpc/powerpc32/setjmp-common.S
> +++ b/sysdeps/powerpc/powerpc32/setjmp-common.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #define _ASM
> #ifdef __NO_VMX__
> diff --git a/sysdeps/powerpc/powerpc64/__longjmp-common.S b/sysdeps/powerpc/powerpc64/__longjmp-common.S
> index 5f629e1e0f..ff3e0beb23 100644
> --- a/sysdeps/powerpc/powerpc64/__longjmp-common.S
> +++ b/sysdeps/powerpc/powerpc64/__longjmp-common.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #define _ASM
> #define _SETJMP_H
> diff --git a/sysdeps/powerpc/powerpc64/setjmp-common.S b/sysdeps/powerpc/powerpc64/setjmp-common.S
> index 19e76d59ee..75389e4d26 100644
> --- a/sysdeps/powerpc/powerpc64/setjmp-common.S
> +++ b/sysdeps/powerpc/powerpc64/setjmp-common.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <stap-probe.h>
> #define _ASM
> #ifdef __NO_VMX__
> diff --git a/sysdeps/riscv/jmpbuf-unwind.h b/sysdeps/riscv/jmpbuf-unwind.h
> index 28e73dda55..b411a246d1 100644
> --- a/sysdeps/riscv/jmpbuf-unwind.h
> +++ b/sysdeps/riscv/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/s390/jmpbuf-unwind.h b/sysdeps/s390/jmpbuf-unwind.h
> index b4ff8da6e2..10b37f09c3 100644
> --- a/sysdeps/s390/jmpbuf-unwind.h
> +++ b/sysdeps/s390/jmpbuf-unwind.h
> @@ -21,6 +21,7 @@
> #include <unwind.h>
> #include <bits/wordsize.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> diff --git a/sysdeps/s390/s390-32/__longjmp.c b/sysdeps/s390/s390-32/__longjmp.c
> index 09a3a2b8f8..83d42329a3 100644
> --- a/sysdeps/s390/s390-32/__longjmp.c
> +++ b/sysdeps/s390/s390-32/__longjmp.c
> @@ -17,6 +17,7 @@
>
> #include <errno.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <setjmp.h>
> #include <bits/setjmp.h>
> #include <stdlib.h>
> diff --git a/sysdeps/s390/s390-32/setjmp.S b/sysdeps/s390/s390-32/setjmp.S
> index c15c7bb99a..08704238f8 100644
> --- a/sysdeps/s390/s390-32/setjmp.S
> +++ b/sysdeps/s390/s390-32/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #define _ASM
> #define _SETJMP_H
> #include <bits/setjmp.h>
> diff --git a/sysdeps/s390/s390-64/__longjmp.c b/sysdeps/s390/s390-64/__longjmp.c
> index 2ca96e1b1b..9fe4939e5e 100644
> --- a/sysdeps/s390/s390-64/__longjmp.c
> +++ b/sysdeps/s390/s390-64/__longjmp.c
> @@ -17,6 +17,7 @@
>
> #include <errno.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <setjmp.h>
> #include <bits/setjmp.h>
> #include <stdlib.h>
> diff --git a/sysdeps/s390/s390-64/setjmp.S b/sysdeps/s390/s390-64/setjmp.S
> index 6dcd77df15..5c59f571a2 100644
> --- a/sysdeps/s390/s390-64/setjmp.S
> +++ b/sysdeps/s390/s390-64/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #define _ASM
> #define _SETJMP_H
> #include <bits/setjmp.h>
> diff --git a/sysdeps/sh/jmpbuf-unwind.h b/sysdeps/sh/jmpbuf-unwind.h
> index c6672955ae..1957e5275d 100644
> --- a/sysdeps/sh/jmpbuf-unwind.h
> +++ b/sysdeps/sh/jmpbuf-unwind.h
> @@ -19,6 +19,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/sh/sh3/__longjmp.S b/sysdeps/sh/sh3/__longjmp.S
> index 4228b5fef7..f10bed2afe 100644
> --- a/sysdeps/sh/sh3/__longjmp.S
> +++ b/sysdeps/sh/sh3/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #define _SETJMP_H
> #define _ASM
> #include <bits/setjmp.h>
> diff --git a/sysdeps/sh/sh3/setjmp.S b/sysdeps/sh/sh3/setjmp.S
> index 0dd0003efe..363e16fb15 100644
> --- a/sysdeps/sh/sh3/setjmp.S
> +++ b/sysdeps/sh/sh3/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
> ENTRY (__sigsetjmp)
> diff --git a/sysdeps/sh/sh4/__longjmp.S b/sysdeps/sh/sh4/__longjmp.S
> index 2013b71794..bc179e4584 100644
> --- a/sysdeps/sh/sh4/__longjmp.S
> +++ b/sysdeps/sh/sh4/__longjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #define _SETJMP_H
> #define _ASM
> #include <bits/setjmp.h>
> diff --git a/sysdeps/sh/sh4/setjmp.S b/sysdeps/sh/sh4/setjmp.S
> index b73aa3c18c..f28ec42091 100644
> --- a/sysdeps/sh/sh4/setjmp.S
> +++ b/sysdeps/sh/sh4/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
> ENTRY (__sigsetjmp)
> diff --git a/sysdeps/sparc/sparc32/__longjmp.S b/sysdeps/sparc/sparc32/__longjmp.S
> index 5bed2440ac..68b3b15cb1 100644
> --- a/sysdeps/sparc/sparc32/__longjmp.S
> +++ b/sysdeps/sparc/sparc32/__longjmp.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> #include <jmpbuf-offsets.h>
> #define ENV(base,reg) [%base + (reg * 4)]
> diff --git a/sysdeps/sparc/sparc32/jmpbuf-unwind.h b/sysdeps/sparc/sparc32/jmpbuf-unwind.h
> index 3ab5088555..8b697ed95b 100644
> --- a/sysdeps/sparc/sparc32/jmpbuf-unwind.h
> +++ b/sysdeps/sparc/sparc32/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/sparc/sparc32/setjmp.S b/sysdeps/sparc/sparc32/setjmp.S
> index 9c7531bc95..c4e29c47b9 100644
> --- a/sysdeps/sparc/sparc32/setjmp.S
> +++ b/sysdeps/sparc/sparc32/setjmp.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <sys/trap.h>
>
> #include <jmpbuf-offsets.h>
Ok.
> diff --git a/sysdeps/unix/sysv/linux/aarch64/pointer_guard.h b/sysdeps/unix/sysv/linux/aarch64/pointer_guard.h
> new file mode 100644
> index 0000000000..b81c9075f3
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/aarch64/pointer_guard.h
> @@ -0,0 +1,68 @@
> +/* Pointer guard implementation. AArch64 version.
> + Copyright (C) 2014-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +/* Pointer mangling is supported for AArch64. */
> +#if (IS_IN (rtld) \
> + || (!defined SHARED && (IS_IN (libc) \
> + || IS_IN (libpthread))))
> +# ifdef __ASSEMBLER__
> +/* Note, dst, src, guard, and tmp are all register numbers rather than
> + register names so they will work with both ILP32 and LP64. */
> +# define PTR_MANGLE(dst, src, guard, tmp) \
> + LDST_PCREL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); \
> + PTR_MANGLE2 (dst, src, guard)
> +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> +# define PTR_MANGLE2(dst, src, guard)\
> + eor x##dst, x##src, x##guard
> +# define PTR_DEMANGLE(dst, src, guard, tmp)\
> + PTR_MANGLE (dst, src, guard, tmp)
> +# define PTR_DEMANGLE2(dst, src, guard)\
> + PTR_MANGLE2 (dst, src, guard)
> +# else
> +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#else
> +# ifdef __ASSEMBLER__
> +/* Note, dst, src, guard, and tmp are all register numbers rather than
> + register names so they will work with both ILP32 and LP64. */
> +# define PTR_MANGLE(dst, src, guard, tmp) \
> + LDST_GLOBAL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard)); \
> + PTR_MANGLE2 (dst, src, guard)
> +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> +# define PTR_MANGLE2(dst, src, guard)\
> + eor x##dst, x##src, x##guard
> +# define PTR_DEMANGLE(dst, src, guard, tmp)\
> + PTR_MANGLE (dst, src, guard, tmp)
> +# define PTR_DEMANGLE2(dst, src, guard)\
> + PTR_MANGLE2 (dst, src, guard)
> +# else
> +# include <stdint.h>
> +extern uintptr_t __pointer_chk_guard attribute_relro;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
> index f1853e012f..8ba50dab8f 100644
> --- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
> @@ -233,49 +233,4 @@
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling is supported for AArch64. */
> -#if (IS_IN (rtld) \
> - || (!defined SHARED && (IS_IN (libc) \
> - || IS_IN (libpthread))))
> -# ifdef __ASSEMBLER__
> -/* Note, dst, src, guard, and tmp are all register numbers rather than
> - register names so they will work with both ILP32 and LP64. */
> -# define PTR_MANGLE(dst, src, guard, tmp) \
> - LDST_PCREL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); \
> - PTR_MANGLE2 (dst, src, guard)
> -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> -# define PTR_MANGLE2(dst, src, guard)\
> - eor x##dst, x##src, x##guard
> -# define PTR_DEMANGLE(dst, src, guard, tmp)\
> - PTR_MANGLE (dst, src, guard, tmp)
> -# define PTR_DEMANGLE2(dst, src, guard)\
> - PTR_MANGLE2 (dst, src, guard)
> -# else
> -extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#else
> -# ifdef __ASSEMBLER__
> -/* Note, dst, src, guard, and tmp are all register numbers rather than
> - register names so they will work with both ILP32 and LP64. */
> -# define PTR_MANGLE(dst, src, guard, tmp) \
> - LDST_GLOBAL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard)); \
> - PTR_MANGLE2 (dst, src, guard)
> -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> -# define PTR_MANGLE2(dst, src, guard)\
> - eor x##dst, x##src, x##guard
> -# define PTR_DEMANGLE(dst, src, guard, tmp)\
> - PTR_MANGLE (dst, src, guard, tmp)
> -# define PTR_DEMANGLE2(dst, src, guard)\
> - PTR_MANGLE2 (dst, src, guard)
> -# else
> -extern uintptr_t __pointer_chk_guard attribute_relro;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* linux/aarch64/sysdep.h */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S b/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S
> index 610f401d45..566a3b0211 100644
> --- a/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S
> +++ b/sysdeps/unix/sysv/linux/alpha/____longjmp_chk.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
>
> diff --git a/sysdeps/unix/sysv/linux/alpha/pointer_guard.h b/sysdeps/unix/sysv/linux/alpha/pointer_guard.h
> new file mode 100644
> index 0000000000..d4d513d816
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/alpha/pointer_guard.h
> @@ -0,0 +1,62 @@
> +/* Pointer guard implementation. Alpha version.
> + Copyright (C) 2006-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library. If not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +/* Pointer mangling support. Note that tls access is slow enough that
> + we don't deoptimize things by placing the pointer check value there. */
> +
> +#ifdef __ASSEMBLER__
> +# if IS_IN (rtld)
> +# define PTR_MANGLE(dst, src, tmp) \
> + ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \
> + ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \
> + xor src, tmp, dst
> +# define PTR_MANGLE2(dst, src, tmp) \
> + xor src, tmp, dst
> +# elif defined SHARED
> +# define PTR_MANGLE(dst, src, tmp) \
> + ldq tmp, __pointer_chk_guard; \
> + xor src, tmp, dst
> +# else
> +# define PTR_MANGLE(dst, src, tmp) \
> + ldq tmp, __pointer_chk_guard_local; \
> + xor src, tmp, dst
> +# endif
> +# define PTR_MANGLE2(dst, src, tmp) \
> + xor src, tmp, dst
> +# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
> +# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
> +#else
> +# include <stdint.h>
> +# if (IS_IN (rtld) \
> + || (!defined SHARED && (IS_IN (libc) \
> + || IS_IN (libpthread))))
> +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> +# else
> +extern uintptr_t __pointer_chk_guard attribute_relro;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof(var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> +# endif
> +# define PTR_DEMANGLE(var) PTR_MANGLE(var)
> +#endif /* ASSEMBLER */
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/alpha/sysdep.h b/sysdeps/unix/sysv/linux/alpha/sysdep.h
> index 77ec2b5400..0ddcb58b30 100644
> --- a/sysdeps/unix/sysv/linux/alpha/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/alpha/sysdep.h
> @@ -313,44 +313,4 @@ __LABEL(name) \
> })
> #endif /* ASSEMBLER */
>
> -/* Pointer mangling support. Note that tls access is slow enough that
> - we don't deoptimize things by placing the pointer check value there. */
> -
> -#ifdef __ASSEMBLER__
> -# if IS_IN (rtld)
> -# define PTR_MANGLE(dst, src, tmp) \
> - ldah tmp, __pointer_chk_guard_local($29) !gprelhigh; \
> - ldq tmp, __pointer_chk_guard_local(tmp) !gprellow; \
> - xor src, tmp, dst
> -# define PTR_MANGLE2(dst, src, tmp) \
> - xor src, tmp, dst
> -# elif defined SHARED
> -# define PTR_MANGLE(dst, src, tmp) \
> - ldq tmp, __pointer_chk_guard; \
> - xor src, tmp, dst
> -# else
> -# define PTR_MANGLE(dst, src, tmp) \
> - ldq tmp, __pointer_chk_guard_local; \
> - xor src, tmp, dst
> -# endif
> -# define PTR_MANGLE2(dst, src, tmp) \
> - xor src, tmp, dst
> -# define PTR_DEMANGLE(dst, tmp) PTR_MANGLE(dst, dst, tmp)
> -# define PTR_DEMANGLE2(dst, tmp) PTR_MANGLE2(dst, dst, tmp)
> -#else
> -# include <stdint.h>
> -# if (IS_IN (rtld) \
> - || (!defined SHARED && (IS_IN (libc) \
> - || IS_IN (libpthread))))
> -extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> -# else
> -extern uintptr_t __pointer_chk_guard attribute_relro;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof(var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> -# endif
> -# define PTR_DEMANGLE(var) PTR_MANGLE(var)
> -#endif /* ASSEMBLER */
> -
> #endif /* _LINUX_ALPHA_SYSDEP_H */
> diff --git a/sysdeps/unix/sysv/linux/arc/sysdep.h b/sysdeps/unix/sysv/linux/arc/sysdep.h
> index d0c1a78381..512284a705 100644
> --- a/sysdeps/unix/sysv/linux/arc/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/arc/sysdep.h
> @@ -215,10 +215,6 @@ hidden_proto (__syscall_error)
> LOAD_ARGS_6 (nm, arg1, arg2, arg3, arg4, arg5, arg6) \
> register long int _arg7 __asm__ ("r6") = _tmp7;
>
> -/* Pointer mangling not yet supported. */
> -# define PTR_MANGLE(var) (void) (var)
> -# define PTR_DEMANGLE(var) (void) (var)
> -
> # undef HAVE_INTERNAL_BRK_ADDR_SYMBOL
> # define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1
>
Ok.
> diff --git a/sysdeps/unix/sysv/linux/csky/pointer_guard.h b/sysdeps/unix/sysv/linux/csky/pointer_guard.h
> new file mode 100644
> index 0000000000..ed683220c9
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/csky/pointer_guard.h
> @@ -0,0 +1,68 @@
> +/* Pointer obfuscation implenentation. C-SKY version.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if (IS_IN (rtld) \
> + || (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(dst, src, guard) \
> + grs t0, 1f; \
> +1: \
> + lrw guard, 1b@GOTPC; \
> + addu t0, guard; \
> + lrw guard, __pointer_chk_guard_local@GOT; \
> + ldr.w guard, (t0, guard << 0); \
> + ldw guard, (guard, 0); \
> + xor dst, src, guard;
> +# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
> +# define PTR_MANGLE2(dst, src, guard) \
> + xor dst, src, guard
> +# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
> +# else
> +extern uintptr_t __pointer_chk_guard_local;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(dst, src, guard) \
> + grs t0, 1f; \
> +1: \
> + lrw guard, 1b@GOTPC; \
> + addu t0, guard; \
> + lrw guard, __pointer_chk_guard@GOT; \
> + ldr.w guard, (t0, guard << 0); \
> + ldw guard, (guard, 0); \
> + xor dst, src, guard;
> +# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
> +# define PTR_MANGLE2(dst, src, guard) \
> + xor dst, src, guard
> +# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
> +# else
> +# include <stdint.h>
> +extern uintptr_t __pointer_chk_guard;
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/csky/sysdep.h b/sysdeps/unix/sysv/linux/csky/sysdep.h
> index 56c527fa8b..76b09f0cc6 100644
> --- a/sysdeps/unix/sysv/linux/csky/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/csky/sysdep.h
> @@ -466,50 +466,4 @@ __local_syscall_error: \
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if (IS_IN (rtld) \
> - || (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread))))
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(dst, src, guard) \
> - grs t0, 1f; \
> -1: \
> - lrw guard, 1b@GOTPC; \
> - addu t0, guard; \
> - lrw guard, __pointer_chk_guard_local@GOT; \
> - ldr.w guard, (t0, guard << 0); \
> - ldw guard, (guard, 0); \
> - xor dst, src, guard;
> -# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
> -# define PTR_MANGLE2(dst, src, guard) \
> - xor dst, src, guard
> -# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
> -# else
> -extern uintptr_t __pointer_chk_guard_local;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(dst, src, guard) \
> - grs t0, 1f; \
> -1: \
> - lrw guard, 1b@GOTPC; \
> - addu t0, guard; \
> - lrw guard, __pointer_chk_guard@GOT; \
> - ldr.w guard, (t0, guard << 0); \
> - ldw guard, (guard, 0); \
> - xor dst, src, guard;
> -# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
> -# define PTR_MANGLE2(dst, src, guard) \
> - xor dst, src, guard
> -# define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard)
> -# else
> -extern uintptr_t __pointer_chk_guard;
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* linux/csky/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/hppa/sysdep.h b/sysdeps/unix/sysv/linux/hppa/sysdep.h
> index 2f339a4bd6..3aef8f536a 100644
> --- a/sysdeps/unix/sysv/linux/hppa/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/hppa/sysdep.h
> @@ -470,8 +470,4 @@ L(pre_end): ASM_LINE_SEP \
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling is not yet supported for HPPA. */
> -#define PTR_MANGLE(var) (void) (var)
> -#define PTR_DEMANGLE(var) (void) (var)
> -
> #endif /* _LINUX_HPPA_SYSDEP_H */
> diff --git a/sysdeps/unix/sysv/linux/i386/____longjmp_chk.S b/sysdeps/unix/sysv/linux/i386/____longjmp_chk.S
> index a1cf9a4b21..f409542a62 100644
> --- a/sysdeps/unix/sysv/linux/i386/____longjmp_chk.S
> +++ b/sysdeps/unix/sysv/linux/i386/____longjmp_chk.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/unix/sysv/linux/i386/pointer_guard.h b/sysdeps/unix/sysv/linux/i386/pointer_guard.h
> new file mode 100644
> index 0000000000..a2d2a0c38b
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/i386/pointer_guard.h
> @@ -0,0 +1,49 @@
> +/* Pointer obfuscation implenentation. i386 version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#include <tcb-offsets.h>
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. Using a global variable
> + is too complicated here since we have no PC-relative addressing mode. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg) xorl %gs:POINTER_GUARD, reg; \
> + roll $9, reg
> +# define PTR_DEMANGLE(reg) rorl $9, reg; \
> + xorl %gs:POINTER_GUARD, reg
> +# else
> +# define PTR_MANGLE(var) asm ("xorl %%gs:%c2, %0\n" \
> + "roll $9, %0" \
> + : "=r" (var) \
> + : "0" (var), \
> + "i" (POINTER_GUARD))
> +# define PTR_DEMANGLE(var) asm ("rorl $9, %0\n" \
> + "xorl %%gs:%c2, %0" \
> + : "=r" (var) \
> + : "0" (var), \
> + "i" (POINTER_GUARD))
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
> index 7085f7e19a..b8be668a42 100644
> --- a/sysdeps/unix/sysv/linux/i386/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
> @@ -446,34 +446,6 @@ struct libc_do_syscall_args
>
> #endif /* __ASSEMBLER__ */
>
> -
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. Using a global variable
> - is too complicated here since we have no PC-relative addressing mode. */
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg) xorl %gs:POINTER_GUARD, reg; \
> - roll $9, reg
> -# define PTR_DEMANGLE(reg) rorl $9, reg; \
> - xorl %gs:POINTER_GUARD, reg
> -# else
> -# define PTR_MANGLE(var) asm ("xorl %%gs:%c2, %0\n" \
> - "roll $9, %0" \
> - : "=r" (var) \
> - : "0" (var), \
> - "i" (offsetof (tcbhead_t, \
> - pointer_guard)))
> -# define PTR_DEMANGLE(var) asm ("rorl $9, %0\n" \
> - "xorl %%gs:%c2, %0" \
> - : "=r" (var) \
> - : "0" (var), \
> - "i" (offsetof (tcbhead_t, \
> - pointer_guard)))
> -# endif
> -#endif
> -
> /* Each shadow stack slot takes 4 bytes. Assuming that each stack
> frame takes 128 bytes, this is used to compute shadow stack size
> from stack size. */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/ia64/__ia64_longjmp.S b/sysdeps/unix/sysv/linux/ia64/__ia64_longjmp.S
> index 9511c15945..4ef5129623 100644
> --- a/sysdeps/unix/sysv/linux/ia64/__ia64_longjmp.S
> +++ b/sysdeps/unix/sysv/linux/ia64/__ia64_longjmp.S
> @@ -15,6 +15,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <features.h>
>
> LEAF(__ia64_flush_rbs)
> diff --git a/sysdeps/unix/sysv/linux/ia64/__longjmp.S b/sysdeps/unix/sysv/linux/ia64/__longjmp.S
> index 793dc98cc1..da9653d8a7 100644
> --- a/sysdeps/unix/sysv/linux/ia64/__longjmp.S
> +++ b/sysdeps/unix/sysv/linux/ia64/__longjmp.S
> @@ -31,6 +31,7 @@
> bits into ar.rnat after setting ar.bspstore. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <features.h>
>
> # define pPos p6 /* is rotate count positive? */
> diff --git a/sysdeps/unix/sysv/linux/ia64/pointer_guard.h b/sysdeps/unix/sysv/linux/ia64/pointer_guard.h
> new file mode 100644
> index 0000000000..8631f39374
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/ia64/pointer_guard.h
> @@ -0,0 +1,44 @@
> +/* Pointer obfuscation implenentation. ia64 version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg, tmpreg) \
> + add tmpreg=-16,r13 \
> + ;; \
> + ld8 tmpreg=[tmpreg] \
> + ;; \
> + xor reg=reg, tmpreg
> +# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/ia64/setjmp.S b/sysdeps/unix/sysv/linux/ia64/setjmp.S
> index c29a31f7a6..a978dd4360 100644
> --- a/sysdeps/unix/sysv/linux/ia64/setjmp.S
> +++ b/sysdeps/unix/sysv/linux/ia64/setjmp.S
> @@ -63,6 +63,7 @@
> 0x1c0 f31 */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <features.h>
>
> /* The following two entry points are the traditional entry points: */
> diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h
> index 14adbdf4ff..b450c6c224 100644
> --- a/sysdeps/unix/sysv/linux/ia64/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h
> @@ -324,24 +324,4 @@
>
> #endif /* not __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg, tmpreg) \
> - add tmpreg=-16,r13 \
> - ;; \
> - ld8 tmpreg=[tmpreg] \
> - ;; \
> - xor reg=reg, tmpreg
> -# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* linux/ia64/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h b/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h
> new file mode 100644
> index 0000000000..4b2ed46167
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/loongarch/pointer_guard.h
> @@ -0,0 +1,82 @@
> +/* Pointer obfuscation implenentation. LoongArch version.
> + Copyright (C) 2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +/* Load a got-relative EXPR into G, using T.
> + Note G and T are register names. */
> +#define LD_GLOBAL(G, EXPR) \
> + la.global G, EXPR; \
> + REG_L G, G, 0;
> +
> +/* Load a pc-relative EXPR into G, using T.
> + Note G and T are register names. */
> +#define LD_PCREL(G, EXPR) \
> + la.pcrel G, EXPR; \
> + REG_L G, G, 0;
> +
> +#if (IS_IN (rtld) \
> + || (!defined SHARED && (IS_IN (libc) \
> + || IS_IN (libpthread))))
> +
> +#ifdef __ASSEMBLER__
> +#define PTR_MANGLE(dst, src, guard) \
> + LD_PCREL (guard, __pointer_chk_guard_local); \
> + PTR_MANGLE2 (dst, src, guard);
> +#define PTR_DEMANGLE(dst, src, guard) \
> + LD_PCREL (guard, __pointer_chk_guard_local); \
> + PTR_DEMANGLE2 (dst, src, guard);
> +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> +#define PTR_MANGLE2(dst, src, guard) \
> + xor dst, src, guard;
> +#define PTR_DEMANGLE2(dst, src, guard) \
> + PTR_MANGLE2 (dst, src, guard);
> +#else
> +# include <stdint.h>
> +extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> +#define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> +#define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +#endif
> +
> +#else
> +
> +#ifdef __ASSEMBLER__
> +#define PTR_MANGLE(dst, src, guard) \
> + LD_GLOBAL (guard, __pointer_chk_guard); \
> + PTR_MANGLE2 (dst, src, guard);
> +#define PTR_DEMANGLE(dst, src, guard) \
> + LD_GLOBAL (guard, __pointer_chk_guard); \
> + PTR_DEMANGLE2 (dst, src, guard);
> +/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> +#define PTR_MANGLE2(dst, src, guard) \
> + xor dst, src, guard;
> +#define PTR_DEMANGLE2(dst, src, guard) \
> + PTR_MANGLE2 (dst, src, guard);
> +#else
> +# include <stdint.h>
> +extern uintptr_t __pointer_chk_guard attribute_relro;
> +#define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> +#define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +#endif
> +
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/loongarch/sysdep.h b/sysdeps/unix/sysv/linux/loongarch/sysdep.h
> index f4a1d23a97..09f8243f25 100644
> --- a/sysdeps/unix/sysv/linux/loongarch/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/loongarch/sysdep.h
> @@ -314,64 +314,4 @@ extern long int __syscall_error (long int neg_errno);
>
> #endif /* ! __ASSEMBLER__ */
>
> -/* Pointer mangling is supported for LoongArch. */
> -
> -/* Load a got-relative EXPR into G, using T.
> - Note G and T are register names. */
> -#define LD_GLOBAL(G, EXPR) \
> - la.global G, EXPR; \
> - REG_L G, G, 0;
> -
> -/* Load a pc-relative EXPR into G, using T.
> - Note G and T are register names. */
> -#define LD_PCREL(G, EXPR) \
> - la.pcrel G, EXPR; \
> - REG_L G, G, 0;
> -
> -#if (IS_IN (rtld) \
> - || (!defined SHARED && (IS_IN (libc) \
> - || IS_IN (libpthread))))
> -
> -#ifdef __ASSEMBLER__
> -#define PTR_MANGLE(dst, src, guard) \
> - LD_PCREL (guard, __pointer_chk_guard_local); \
> - PTR_MANGLE2 (dst, src, guard);
> -#define PTR_DEMANGLE(dst, src, guard) \
> - LD_PCREL (guard, __pointer_chk_guard_local); \
> - PTR_DEMANGLE2 (dst, src, guard);
> -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> -#define PTR_MANGLE2(dst, src, guard) \
> - xor dst, src, guard;
> -#define PTR_DEMANGLE2(dst, src, guard) \
> - PTR_MANGLE2 (dst, src, guard);
> -#else
> -extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
> -#define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local)
> -#define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -#endif
> -
> -#else
> -
> -#ifdef __ASSEMBLER__
> -#define PTR_MANGLE(dst, src, guard) \
> - LD_GLOBAL (guard, __pointer_chk_guard); \
> - PTR_MANGLE2 (dst, src, guard);
> -#define PTR_DEMANGLE(dst, src, guard) \
> - LD_GLOBAL (guard, __pointer_chk_guard); \
> - PTR_DEMANGLE2 (dst, src, guard);
> -/* Use PTR_MANGLE2 for efficiency if guard is already loaded. */
> -#define PTR_MANGLE2(dst, src, guard) \
> - xor dst, src, guard;
> -#define PTR_DEMANGLE2(dst, src, guard) \
> - PTR_MANGLE2 (dst, src, guard);
> -#else
> -extern uintptr_t __pointer_chk_guard attribute_relro;
> -#define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard)
> -#define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -#endif
> -
> -#endif
> -
> #endif /* linux/loongarch/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep.h b/sysdeps/unix/sysv/linux/m68k/sysdep.h
> index d87892a377..064240330a 100644
> --- a/sysdeps/unix/sysv/linux/m68k/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/m68k/sysdep.h
> @@ -295,10 +295,6 @@ SYSCALL_ERROR_LABEL: \
>
> #endif /* not __ASSEMBLER__ */
>
> -/* Pointer mangling is not yet supported for M68K. */
> -#define PTR_MANGLE(var) (void) (var)
> -#define PTR_DEMANGLE(var) (void) (var)
> -
> /* M68K needs system-supplied DSO to access TLS helpers
> even when statically linked. */
> #define NEED_STATIC_SYSINFO_DSO 1
> diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep.h b/sysdeps/unix/sysv/linux/microblaze/sysdep.h
> index fda78f6467..19805f6b5d 100644
> --- a/sysdeps/unix/sysv/linux/microblaze/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/microblaze/sysdep.h
> @@ -304,10 +304,6 @@ SYSCALL_ERROR_LABEL_DCL: \
> })
>
>
> -/* Pointer mangling is not yet supported for Microblaze. */
> -# define PTR_MANGLE(var) (void) (var)
> -# define PTR_DEMANGLE(var) (void) (var)
> -
> #undef HAVE_INTERNAL_BRK_ADDR_SYMBOL
> #define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1
>
> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
> index a2a93bc840..0ef410c3c9 100644
> --- a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
> @@ -337,8 +337,4 @@ libc_hidden_proto (__mips_syscall7, nomips16)
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling is not yet supported for MIPS. */
> -#define PTR_MANGLE(var) (void) (var)
> -#define PTR_DEMANGLE(var) (void) (var)
> -
> #endif /* linux/mips/mips32/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h
> index 2c16a6758d..e362f15300 100644
> --- a/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h
> @@ -300,8 +300,4 @@ typedef long int __syscall_arg_t;
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling is not yet supported for MIPS. */
> -#define PTR_MANGLE(var) (void) (var)
> -#define PTR_DEMANGLE(var) (void) (var)
> -
> #endif /* linux/mips/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/nios2/pointer_guard.h b/sysdeps/unix/sysv/linux/nios2/pointer_guard.h
> new file mode 100644
> index 0000000000..da17809592
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/nios2/pointer_guard.h
> @@ -0,0 +1,40 @@
> +/* Pointer obfuscation implenentation. Nios II version.
> + Copyright (C) 2015-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE_GUARD(guard) ldw guard, POINTER_GUARD(r23)
> +# define PTR_MANGLE(dst, src, guard) xor dst, src, guard
> +# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/nios2/sysdep.h b/sysdeps/unix/sysv/linux/nios2/sysdep.h
> index 5fe960c2a5..46667b9c19 100644
> --- a/sysdeps/unix/sysv/linux/nios2/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/nios2/sysdep.h
> @@ -220,21 +220,4 @@
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE_GUARD(guard) ldw guard, POINTER_GUARD(r23)
> -# define PTR_MANGLE(dst, src, guard) xor dst, src, guard
> -# define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> -
> #endif /* linux/nios2/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/or1k/sysdep.h b/sysdeps/unix/sysv/linux/or1k/sysdep.h
> index 941c934554..b1fdf2a806 100644
> --- a/sysdeps/unix/sysv/linux/or1k/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/or1k/sysdep.h
> @@ -119,10 +119,6 @@ L(pseudo_end): \
>
> extern long int __syscall_error (long int neg_errno);
>
> -/* Pointer mangling is not yet supported for or1k. */
> -#define PTR_MANGLE(var) (void) (var)
> -#define PTR_DEMANGLE(var) (void) (var)
> -
> #undef INTERNAL_SYSCALL
> #define INTERNAL_SYSCALL(name, nr, args...) \
> INTERNAL_SYSCALL_NCS (SYS_ify (name), nr, args)
> diff --git a/sysdeps/unix/sysv/linux/powerpc/pointer_guard.h b/sysdeps/unix/sysv/linux/powerpc/pointer_guard.h
> new file mode 100644
> index 0000000000..5961793c0d
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/powerpc/pointer_guard.h
> @@ -0,0 +1,55 @@
> +/* Pointer obfuscation implenentation. PowerpC version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# if defined(__PPC64__) || defined(__powerpc64__)
> +# define LOAD ld
> +# define TPREG r13
> +# else
> +# define LOAD lwz
> +# define TPREG r2
> +# endif
> +# define PTR_MANGLE(reg, tmpreg) \
> + LOAD tmpreg,POINTER_GUARD(TPREG); \
> + xor reg,tmpreg,reg
> +# define PTR_MANGLE2(reg, tmpreg) \
> + xor reg,tmpreg,reg
> +# define PTR_MANGLE3(destreg, reg, tmpreg) \
> + LOAD tmpreg,POINTER_GUARD(TPREG); \
> + xor destreg,tmpreg,reg
> +# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> +# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
> +# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/powerpc/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/sysdep.h
> index 4fb135aa8d..9e44818978 100644
> --- a/sysdeps/unix/sysv/linux/powerpc/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/powerpc/sysdep.h
> @@ -207,38 +207,6 @@
> #define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
> #define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
>
> -
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -# ifdef __ASSEMBLER__
> -# if defined(__PPC64__) || defined(__powerpc64__)
> -# define LOAD ld
> -# define TPREG r13
> -# else
> -# define LOAD lwz
> -# define TPREG r2
> -# endif
> -# define PTR_MANGLE(reg, tmpreg) \
> - LOAD tmpreg,POINTER_GUARD(TPREG); \
> - xor reg,tmpreg,reg
> -# define PTR_MANGLE2(reg, tmpreg) \
> - xor reg,tmpreg,reg
> -# define PTR_MANGLE3(destreg, reg, tmpreg) \
> - LOAD tmpreg,POINTER_GUARD(TPREG); \
> - xor destreg,tmpreg,reg
> -# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> -# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
> -# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> /* List of system calls which are supported as vsyscalls. */
> #define VDSO_NAME "LINUX_2.6.15"
> #define VDSO_HASH 123718565
> diff --git a/sysdeps/unix/sysv/linux/riscv/sysdep.h b/sysdeps/unix/sysv/linux/riscv/sysdep.h
> index 9b03b10567..c9af888132 100644
> --- a/sysdeps/unix/sysv/linux/riscv/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/riscv/sysdep.h
> @@ -357,8 +357,4 @@ extern long int __syscall_error (long int neg_errno);
>
> #endif /* ! __ASSEMBLER__ */
>
> -/* Pointer mangling is not supported. */
> -#define PTR_MANGLE(var) (void) (var)
> -#define PTR_DEMANGLE(var) (void) (var)
> -
> #endif /* linux/riscv/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/pointer_guard.h b/sysdeps/unix/sysv/linux/s390/s390-32/pointer_guard.h
> new file mode 100644
> index 0000000000..0e85d4ccbb
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/s390/s390-32/pointer_guard.h
> @@ -0,0 +1,45 @@
> +/* Pointer obfuscation implenentation. s390 version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +/* For the time being just use stack_guard rather than a separate
> + pointer_guard. */
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg, tmpreg) \
> + ear tmpreg,%a0; \
> + x reg,STACK_GUARD(tmpreg)
> +# define PTR_MANGLE2(reg, tmpreg) \
> + x reg,STACK_GUARD(tmpreg)
> +# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
> index e41106b377..a24fde7c6d 100644
> --- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
> @@ -177,25 +177,4 @@
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -/* For the time being just use stack_guard rather than a separate
> - pointer_guard. */
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg, tmpreg) \
> - ear tmpreg,%a0; \
> - x reg,STACK_GUARD(tmpreg)
> -# define PTR_MANGLE2(reg, tmpreg) \
> - x reg,STACK_GUARD(tmpreg)
> -# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* _LINUX_S390_SYSDEP_H */
> diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/pointer_guard.h b/sysdeps/unix/sysv/linux/s390/s390-64/pointer_guard.h
> new file mode 100644
> index 0000000000..5285456806
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/s390/s390-64/pointer_guard.h
> @@ -0,0 +1,47 @@
> +/* Pointer obfuscation implenentation. s390x version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +/* For the time being just use stack_guard rather than a separate
> + pointer_guard. */
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg, tmpreg) \
> + ear tmpreg,%a0; \
> + sllg tmpreg,tmpreg,32; \
> + ear tmpreg,%a1; \
> + xg reg,STACK_GUARD(tmpreg)
> +# define PTR_MANGLE2(reg, tmpreg) \
> + xg reg,STACK_GUARD(tmpreg)
> +# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
> index 150e33981a..79bc0fa4a6 100644
> --- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
> @@ -175,27 +175,4 @@
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -/* For the time being just use stack_guard rather than a separate
> - pointer_guard. */
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg, tmpreg) \
> - ear tmpreg,%a0; \
> - sllg tmpreg,tmpreg,32; \
> - ear tmpreg,%a1; \
> - xg reg,STACK_GUARD(tmpreg)
> -# define PTR_MANGLE2(reg, tmpreg) \
> - xg reg,STACK_GUARD(tmpreg)
> -# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* _LINUX_S390_SYSDEP_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S b/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S
> index e821e158c4..cf69926316 100644
> --- a/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S
> +++ b/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> #include <sigaltstack-offsets.h>
>
Ok.
> diff --git a/sysdeps/unix/sysv/linux/sh/pointer_guard.h b/sysdeps/unix/sysv/linux/sh/pointer_guard.h
> new file mode 100644
> index 0000000000..32a571d496
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/sh/pointer_guard.h
> @@ -0,0 +1,43 @@
> +/* Pointer obfuscation implenentation. Generic (no-op) version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. Using a global variable
> + is too complicated here since we have no PC-relative addressing mode. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg, tmp) \
> + stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
> +# define PTR_MANGLE2(reg, tmp) xor tmp,reg
> +# define PTR_DEMANGLE(reg, tmp) PTR_MANGLE (reg, tmp)
> +# define PTR_DEMANGLE2(reg, tmp) PTR_MANGLE2 (reg, tmp)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/sh/sysdep.h b/sysdeps/unix/sysv/linux/sh/sysdep.h
> index e9e13cd184..a2f43f68c3 100644
> --- a/sysdeps/unix/sysv/linux/sh/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/sh/sysdep.h
> @@ -315,23 +315,4 @@
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. Using a global variable
> - is too complicated here since we have no PC-relative addressing mode. */
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg, tmp) \
> - stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
> -# define PTR_MANGLE2(reg, tmp) xor tmp,reg
> -# define PTR_DEMANGLE(reg, tmp) PTR_MANGLE (reg, tmp)
> -# define PTR_DEMANGLE2(reg, tmp) PTR_MANGLE2 (reg, tmp)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* linux/sh/sysdep.h */
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/____longjmp_chk.S b/sysdeps/unix/sysv/linux/sparc/sparc32/____longjmp_chk.S
> index 8e8cb4d751..ad23840bcd 100644
> --- a/sysdeps/unix/sysv/linux/sparc/sparc32/____longjmp_chk.S
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/____longjmp_chk.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
>
> #define ENV(base,reg) [%base + (reg * 4)]
Ok.
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/pointer_guard.h b/sysdeps/unix/sysv/linux/sparc/sparc32/pointer_guard.h
> new file mode 100644
> index 0000000000..4063513cd8
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/pointer_guard.h
> @@ -0,0 +1,44 @@
> +/* Pointer obfuscation implenentation. 32-bit SPARC version.
> + Copyright (C) 2006-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(dreg, reg, tmpreg) \
> + ld [%g7 + POINTER_GUARD], tmpreg; \
> + xor reg, tmpreg, dreg
> +# define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
> +# define PTR_MANGLE2(dreg, reg, tmpreg) \
> + xor reg, tmpreg, dreg
> +# define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
> index 032608a4e0..1783af8178 100644
> --- a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
> @@ -125,24 +125,4 @@ ENTRY(name); \
>
> #endif /* __ASSEMBLER__ */
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(dreg, reg, tmpreg) \
> - ld [%g7 + POINTER_GUARD], tmpreg; \
> - xor reg, tmpreg, dreg
> -# define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
> -# define PTR_MANGLE2(dreg, reg, tmpreg) \
> - xor reg, tmpreg, dreg
> -# define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* linux/sparc/sysdep.h */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/pointer_guard.h b/sysdeps/unix/sysv/linux/sparc/sparc64/pointer_guard.h
> new file mode 100644
> index 0000000000..7865e87c73
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/pointer_guard.h
> @@ -0,0 +1,44 @@
> +/* Pointer obfuscation implenentation. 64-bit SPARC version.
> + Copyright (C) 2006-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# include <sysdeps/generic/pointer_guard.h>
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(dreg, reg, tmpreg) \
> + ldx [%g7 + POINTER_GUARD], tmpreg; \
> + xor reg, tmpreg, dreg
> +# define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
> +# define PTR_MANGLE2(dreg, reg, tmpreg) \
> + xor reg, tmpreg, dreg
> +# define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
> +# else
> +# include <stdint.h>
> +# include <tls.h>
> +# define PTR_MANGLE(var) \
> + (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> +# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
> index 4aaa2912ce..4ae22ae25b 100644
> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h
> @@ -127,24 +127,4 @@ ENTRY(name); \
> register windows. So if you poke stack memory directly you add this. */
> #define STACK_BIAS 2047
>
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(dreg, reg, tmpreg) \
> - ldx [%g7 + POINTER_GUARD], tmpreg; \
> - xor reg, tmpreg, dreg
> -# define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
> -# define PTR_MANGLE2(dreg, reg, tmpreg) \
> - xor reg, tmpreg, dreg
> -# define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
> -# else
> -# define PTR_MANGLE(var) \
> - (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
> -# define PTR_DEMANGLE(var) PTR_MANGLE (var)
> -# endif
> -#endif
> -
> #endif /* linux/sparc64/sysdep.h */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S b/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
> index ffdf4624bf..5ff275c436 100644
> --- a/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
> +++ b/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <asm-syntax.h>
> #include <stap-probe.h>
> diff --git a/sysdeps/unix/sysv/linux/x86_64/pointer_guard.h b/sysdeps/unix/sysv/linux/x86_64/pointer_guard.h
> new file mode 100644
> index 0000000000..2df3912897
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/x86_64/pointer_guard.h
> @@ -0,0 +1,61 @@
> +/* Pointer obfuscation implenentation. x86-64 version.
> + Copyright (C) 2005-2022 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#ifndef POINTER_GUARD_H
> +#define POINTER_GUARD_H
> +
> +#include <x86-lp_size.h>
> +#include <tcb-offsets.h>
> +
> +#if IS_IN (rtld)
> +/* We cannot use the thread descriptor because in ld.so we use setjmp
> + earlier than the descriptor is initialized. */
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg) xor __pointer_chk_guard_local(%rip), reg; \
> + rol $2*LP_SIZE+1, reg
> +# define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \
> + xor __pointer_chk_guard_local(%rip), reg
> +# else
> +# define PTR_MANGLE(reg) asm ("xor __pointer_chk_guard_local(%%rip), %0\n" \
> + "rol $2*" LP_SIZE "+1, %0" \
> + : "=r" (reg) : "0" (reg))
> +# define PTR_DEMANGLE(reg) asm ("ror $2*" LP_SIZE "+1, %0\n" \
> + "xor __pointer_chk_guard_local(%%rip), %0" \
> + : "=r" (reg) : "0" (reg))
> +# endif
> +#else
> +# ifdef __ASSEMBLER__
> +# define PTR_MANGLE(reg) xor %fs:POINTER_GUARD, reg; \
> + rol $2*LP_SIZE+1, reg
> +# define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \
> + xor %fs:POINTER_GUARD, reg
> +# else
> +# define PTR_MANGLE(var) asm ("xor %%fs:%c2, %0\n" \
> + "rol $2*" LP_SIZE "+1, %0" \
> + : "=r" (var) \
> + : "0" (var), \
> + "i" (POINTER_GUARD))
> +# define PTR_DEMANGLE(var) asm ("ror $2*" LP_SIZE "+1, %0\n" \
> + "xor %%fs:%c2, %0" \
> + : "=r" (var) \
> + : "0" (var), \
> + "i" (POINTER_GUARD))
> +# endif
> +#endif
> +
> +#endif /* POINTER_GUARD_H */
Ok.
> diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
> index 740abefcfd..5e4d7827d7 100644
> --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h
> +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
> @@ -381,46 +381,6 @@
>
> #endif /* __ASSEMBLER__ */
>
> -
> -/* Pointer mangling support. */
> -#if IS_IN (rtld)
> -/* We cannot use the thread descriptor because in ld.so we use setjmp
> - earlier than the descriptor is initialized. */
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg) xor __pointer_chk_guard_local(%rip), reg; \
> - rol $2*LP_SIZE+1, reg
> -# define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \
> - xor __pointer_chk_guard_local(%rip), reg
> -# else
> -# define PTR_MANGLE(reg) asm ("xor __pointer_chk_guard_local(%%rip), %0\n" \
> - "rol $2*" LP_SIZE "+1, %0" \
> - : "=r" (reg) : "0" (reg))
> -# define PTR_DEMANGLE(reg) asm ("ror $2*" LP_SIZE "+1, %0\n" \
> - "xor __pointer_chk_guard_local(%%rip), %0" \
> - : "=r" (reg) : "0" (reg))
> -# endif
> -#else
> -# ifdef __ASSEMBLER__
> -# define PTR_MANGLE(reg) xor %fs:POINTER_GUARD, reg; \
> - rol $2*LP_SIZE+1, reg
> -# define PTR_DEMANGLE(reg) ror $2*LP_SIZE+1, reg; \
> - xor %fs:POINTER_GUARD, reg
> -# else
> -# define PTR_MANGLE(var) asm ("xor %%fs:%c2, %0\n" \
> - "rol $2*" LP_SIZE "+1, %0" \
> - : "=r" (var) \
> - : "0" (var), \
> - "i" (offsetof (tcbhead_t, \
> - pointer_guard)))
> -# define PTR_DEMANGLE(var) asm ("ror $2*" LP_SIZE "+1, %0\n" \
> - "xor %%fs:%c2, %0" \
> - : "=r" (var) \
> - : "0" (var), \
> - "i" (offsetof (tcbhead_t, \
> - pointer_guard)))
> -# endif
> -#endif
> -
> /* How to pass the off{64}_t argument on p{readv,writev}{64}. */
> #undef LO_HI_LONG
> #define LO_HI_LONG(val) (val), 0
Ok.
> diff --git a/sysdeps/x86_64/__longjmp.S b/sysdeps/x86_64/__longjmp.S
> index b51d79168c..6fdb4ccfbf 100644
> --- a/sysdeps/x86_64/__longjmp.S
> +++ b/sysdeps/x86_64/__longjmp.S
> @@ -16,6 +16,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/x86_64/jmpbuf-unwind.h b/sysdeps/x86_64/jmpbuf-unwind.h
> index 42ea37508e..c92b2633bc 100644
> --- a/sysdeps/x86_64/jmpbuf-unwind.h
> +++ b/sysdeps/x86_64/jmpbuf-unwind.h
> @@ -20,6 +20,7 @@
> #include <stdint.h>
> #include <unwind.h>
> #include <sysdep.h>
> +#include <pointer_guard.h>
>
> /* Test if longjmp to JMPBUF would unwind the frame
> containing a local variable at ADDRESS. */
> diff --git a/sysdeps/x86_64/setjmp.S b/sysdeps/x86_64/setjmp.S
> index 1b77dcd4f9..3897e66dc4 100644
> --- a/sysdeps/x86_64/setjmp.S
> +++ b/sysdeps/x86_64/setjmp.S
> @@ -17,6 +17,7 @@
> <https://www.gnu.org/licenses/>. */
>
> #include <sysdep.h>
> +#include <pointer_guard.h>
> #include <jmpbuf-offsets.h>
> #include <jmp_buf-ssp.h>
> #include <asm-syntax.h>
> diff --git a/sysdeps/x86_64/x32/x86-lp_size.h b/sysdeps/x86_64/x32/x86-lp_size.h
> index ad03eb66b2..0b71e58be5 100644
> --- a/sysdeps/x86_64/x32/x86-lp_size.h
> +++ b/sysdeps/x86_64/x32/x86-lp_size.h
> @@ -1,4 +1,4 @@
> -/* Pointer size definition for x86-64 x42.
> +/* Pointer size definition for x86-64 x32.
> Copyright (C) 2022 Free Software Foundation, Inc.
> This file is part of the GNU C Library.
>
> diff --git a/wcsmbs/btowc.c b/wcsmbs/btowc.c
> index 21e52a67f4..7023ec99f1 100644
> --- a/wcsmbs/btowc.c
> +++ b/wcsmbs/btowc.c
> @@ -24,7 +24,7 @@
> #include <wcsmbsload.h>
> #include <limits.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> wint_t
> diff --git a/wcsmbs/mbrtoc16.c b/wcsmbs/mbrtoc16.c
> index b23d9b0160..f8b029b58a 100644
> --- a/wcsmbs/mbrtoc16.c
> +++ b/wcsmbs/mbrtoc16.c
> @@ -22,7 +22,7 @@
> #include <uchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/mbrtoc8.c b/wcsmbs/mbrtoc8.c
> index dd80b5282d..e745a49e09 100644
> --- a/wcsmbs/mbrtoc8.c
> +++ b/wcsmbs/mbrtoc8.c
> @@ -23,8 +23,6 @@
> #include <uchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> -
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> #endif
> diff --git a/wcsmbs/mbrtowc.c b/wcsmbs/mbrtowc.c
> index 78d9994f67..46a1cc38df 100644
> --- a/wcsmbs/mbrtowc.c
> +++ b/wcsmbs/mbrtowc.c
> @@ -22,7 +22,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/mbsnrtowcs.c b/wcsmbs/mbsnrtowcs.c
> index 5860822400..06a1f2d36f 100644
> --- a/wcsmbs/mbsnrtowcs.c
> +++ b/wcsmbs/mbsnrtowcs.c
> @@ -23,7 +23,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/mbsrtowcs_l.c b/wcsmbs/mbsrtowcs_l.c
> index 0ebc389fdb..526b88e1dd 100644
> --- a/wcsmbs/mbsrtowcs_l.c
> +++ b/wcsmbs/mbsrtowcs_l.c
> @@ -27,7 +27,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/wcrtomb.c b/wcsmbs/wcrtomb.c
> index c0cce3792f..42690f2efd 100644
> --- a/wcsmbs/wcrtomb.c
> +++ b/wcsmbs/wcrtomb.c
> @@ -25,7 +25,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/wcsnrtombs.c b/wcsmbs/wcsnrtombs.c
> index 9707f6f4bc..6ba180cdc2 100644
> --- a/wcsmbs/wcsnrtombs.c
> +++ b/wcsmbs/wcsnrtombs.c
> @@ -22,7 +22,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/wcsrtombs.c b/wcsmbs/wcsrtombs.c
> index b1ac704b28..7db2b181b3 100644
> --- a/wcsmbs/wcsrtombs.c
> +++ b/wcsmbs/wcsrtombs.c
> @@ -23,7 +23,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
> #ifndef EILSEQ
> # define EILSEQ EINVAL
> diff --git a/wcsmbs/wctob.c b/wcsmbs/wctob.c
> index 573c2c9448..5dfbd7ab7e 100644
> --- a/wcsmbs/wctob.c
> +++ b/wcsmbs/wctob.c
> @@ -22,7 +22,7 @@
> #include <wchar.h>
> #include <wcsmbsload.h>
>
> -#include <sysdep.h>
> +#include <pointer_guard.h>
>
>
> int
Ok.
next prev parent reply other threads:[~2022-10-17 16:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-13 12:20 [PATCH 0/3] PTR_MANGLE/PTR_DEMANGLE refactoring Florian Weimer
2022-10-13 12:20 ` [PATCH 1/3] x86-64: Move LP_SIZE definition to its own header Florian Weimer
2022-10-17 16:03 ` Adhemerval Zanella Netto
2022-10-13 12:20 ` [PATCH 2/3] Introduce <pointer_guard.h>, extracted from <sysdep.h> Florian Weimer
2022-10-14 3:30 ` DJ Delorie
2022-10-14 8:14 ` Florian Weimer
2022-10-17 16:13 ` Adhemerval Zanella Netto [this message]
2022-10-18 15:03 ` Florian Weimer
2022-10-13 12:20 ` [PATCH 3/3] Use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources Florian Weimer
2022-10-17 16:15 ` Adhemerval Zanella Netto
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