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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/unix/sysv/linux/or1k | |
| parent | 246f37d6b1c4c6c0a6365df8783e62e3adf208e8 (diff) | |
| download | glibc-88f4b6929c26f9240a4b0b7dcc62922f02544a09.zip glibc-88f4b6929c26f9240a4b0b7dcc62922f02544a09.tar.gz glibc-88f4b6929c26f9240a4b0b7dcc62922f02544a09.tar.bz2 | |
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/unix/sysv/linux/or1k')
| -rw-r--r-- | sysdeps/unix/sysv/linux/or1k/sysdep.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/or1k/sysdep.h b/sysdeps/unix/sysv/linux/or1k/sysdep.h index 941c934..b1fdf2a 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) |