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author | Florian Weimer <fweimer@redhat.com> | 2022-10-18 17:00:07 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2022-10-18 17:03:55 +0200 |
commit | 88f4b6929c26f9240a4b0b7dcc62922f02544a09 (patch) | |
tree | 72acb4a359d3ec56729a910386bd1a002bd69e3c /sysdeps/unix/sysv/linux/mips | |
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/unix/sysv/linux/mips')
-rw-r--r-- | sysdeps/unix/sysv/linux/mips/mips32/sysdep.h | 4 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/mips/mips64/sysdep.h | 4 |
2 files changed, 0 insertions, 8 deletions
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 */ |