diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/kernel-features.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/kernel-features.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 5b35722768..7305686081 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -86,6 +86,14 @@ either support ipc syscall and/or all the ipc correspondent syscalls. */ #define __ASSUME_DIRECT_SYSVIPC_SYSCALLS 1 +/* All supported architectures reserve a 32-bit for MODE field in sysvipc + ipc_perm. However, some kernel ABI interfaces still expect a 16-bit + field. This is only an issue if arch-defined IPC_PERM padding is on a + wrong position regarding endianness. In this case, the IPC control + routines (msgctl, semctl, and semtctl) requires to shift the value to + correct place. + The ABIs that requires it define __ASSUME_SYSVIPC_BROKEN_MODE_T. */ + /* Support for p{read,write}v2 was added in 4.6. However Linux default implementation does not assume the __ASSUME_* and instead use a fallback implementation based on p{read,write}v and returning an error for |