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| author | Florian Weimer <fweimer@redhat.com> | 2022-10-18 17:00:07 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-10-18 17:03:55 +0200 |
| commit | 88f4b6929c26f9240a4b0b7dcc62922f02544a09 (patch) | |
| tree | 72acb4a359d3ec56729a910386bd1a002bd69e3c /sysdeps/mach | |
| parent | 246f37d6b1c4c6c0a6365df8783e62e3adf208e8 (diff) | |
| download | glibc-88f4b6929c26f9240a4b0b7dcc62922f02544a09.tar.gz glibc-88f4b6929c26f9240a4b0b7dcc62922f02544a09.tar.xz glibc-88f4b6929c26f9240a4b0b7dcc62922f02544a09.zip | |
Introduce <pointer_guard.h>, extracted from <sysdep.h>
This allows us to define a generic no-op version of PTR_MANGLE and PTR_DEMANGLE. In the future, we can use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources, avoiding an unintended loss of hardening due to missing include files or unlucky header inclusion ordering. In i386 and x86_64, we can avoid a <tls.h> dependency in the C code by using the computed constant from <tcb-offsets.h>. <sysdep.h> no longer includes these definitions, so there is no cyclic dependency anymore when computing the <tcb-offsets.h> constants. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/mach')
| -rw-r--r-- | sysdeps/mach/hurd/i386/____longjmp_chk.S | 1 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/i386/__longjmp.S | 1 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/jmp-unwind.c | 2 |
3 files changed, 3 insertions, 1 deletions
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" |