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ipc: Refactor sysvipc internal definitions

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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>
This commit is contained in:
Adhemerval Zanella
2019-05-15 15:20:58 -03:00
parent 7d3db434f9
commit 06436acf81
22 changed files with 56 additions and 192 deletions
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3
sysdeps/unix/sysv/linux/sparc/kernel-features.h
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@ -60,6 +60,9 @@
/* sparc only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
#ifndef __arch64__
# undef __ASSUME_SYSVIPC_DEFAULT_IPC_64
#endif
/* Support for the renameat2 syscall was added in 3.16. */
#if __LINUX_KERNEL_VERSION < 0x031000

19
sysdeps/unix/sysv/linux/sparc/sparc64/ipc_priv.h
View File

@ -16,26 +16,17 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sys/ipc.h> /* For __key_t */
#define __IPC_64 0x0
struct __old_ipc_perm
{
__key_t __key; /* Key. */
unsigned int uid; /* Owner's user ID. */
unsigned int gid; /* Owner's group ID. */
unsigned int cuid; /* Creator's user ID. */
unsigned int cgid; /* Creator's group ID. */
unsigned int mode; /* Read/write permission. */
unsigned short int __seq; /* Sequence number. */
};
#define __OLD_IPC_ID_TYPE unsigned int
#define __OLD_IPC_MODE_TYPE unsigned int
#include <sysdeps/unix/sysv/linux/ipc_priv.h>
/* SPARC semctl multiplex syscall expects the union pointed address, not
the union address itself. */
#undef SEMCTL_ARG_ADDRESS
#define SEMCTL_ARG_ADDRESS(__arg) __arg.array
/* Also for msgrcv it does not use the kludge on final 2 arguments. */
#undef MSGRCV_ARGS
#define MSGRCV_ARGS(__msgp, __msgtyp) __msgp, __msgtyp
#define SEMTIMEDOP_IPC_ARGS(__nsops, __sops, __timeout) \