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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-05-15 15:20:58 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-10-17 11:04:59 -0300
commit06436acf819d9e6ada7be3ca977d5c0a23d3f138 (patch)
treec1fa0e3ac981c845d83b2cd985c563c7059f55e9 /sysdeps/unix/sysv/linux/alpha/kernel-features.h
parent7d3db434f910c23591f748a6d0ac3548af1048bb (diff)
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ipc: Refactor sysvipc internal definitions
This patch refactor the internal sysvipc in two main points:

  1. Add a new __ASSUME_SYSVIPC_DEFAULT_IPC_64 to infer the __IPC_64
     value to be used along either the multiplexed __NR_ipc or wired-up
     syscall.  The defaut value assumed for __IPC_64 is also changed
     from 0x100 to 0x0, aligning with Linux generic UAPI.  The idea
     is to simplify the Linux 5.1 wire-up for sysvipc syscalls for
     some 32-bit ABIs (which expectes __IPC_64 being 0x0) and simplify
     new ports (which will no longer need to add ipc_priv.h).

  2. It also removes some duplicated internal definition used on compat
     sysvipc symbols defined at ipc_priv.h (more specifically the
     __old_ipc_perm, SEMCTL_ARG_ADDRESS, MSGRCV_ARGS, and
     SEMTIMEDOP_IPC_ARGS).  The idea is also to make it simpler to enable
     the new wire-up sysvipc syscall provided by Linux v5.1.

There is no semantic change expected on any port.  Checked with a build
against all affected ABIs.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/kernel-features.h')
-rw-r--r--sysdeps/unix/sysv/linux/alpha/kernel-features.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/kernel-features.h b/sysdeps/unix/sysv/linux/alpha/kernel-features.h
index 3928b4b62c..d12916c656 100644
--- a/sysdeps/unix/sysv/linux/alpha/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/alpha/kernel-features.h
@@ -52,4 +52,7 @@
 # undef __ASSUME_STATX
 #endif
 
+/* Alpha requires old sysvipc even being a 64-bit architecture.  */
+#undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
+
 #endif /* _KERNEL_FEATURES_H */