From 729f34028a7f494b599a29889df825cf826b6de0 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Wed, 17 Oct 2018 11:56:28 +0000 Subject: Use single bits/shm.h for all architectures. After my patch to move SHMLBA to its own header, the bits/shm.h headers for architectures using the Linux kernel still vary in a few ways: the use of __syscall_ulong_t; whether padding for 32-bit systems is present before or after time fields, or missing altogether (mips, x32); whether shm_segsz is before or after the time fields; whether, if after time fields, there is extra padding before shm_segsz. This patch arranges for a single header to be used. __syscall_ulong_t is safe to use everywhere, while bits/shm-pad.h is added with new macros __SHM_PAD_AFTER_TIME, __SHM_PAD_BEFORE_TIME, __SHM_SEGSZ_AFTER_TIME and __SHM_PAD_BETWEEN_TIME_AND_SEGSZ to describe the differences. Tested for x86_64 and x86, and with build-many-glibcs.py. * sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add bits/shm-pad.h. * sysdeps/unix/sysv/linux/bits/shm.h: Include . (shmatt_t): Define as __syscall_ulong_t. (__SHM_PAD_TIME): New macro, depending on [__SHM_PAD_BEFORE_TIME] and [__SHM_PAD_AFTER_TIME]. (struct shmid_ds): Define time fields using __SHM_PAD_TIME. Define shm_segsz and associated padding based on [__SHM_SEGSZ_AFTER_TIME] and [__SHM_PAD_BETWEEN_TIME_AND_SEGSZ]. Use __syscall_ulong_t instead of unsigned long int. [__USE_MISC] (struct shminfo): Use __syscall_ulong_t instead of unsigned long int. [__USE_MISC] (struct shm_info): Likewise. * sysdeps/unix/sysv/linux/bits/shm-pad.h: New file. * sysdeps/unix/sysv/linux/hppa/bits/shm-pad.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/shm-pad.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/shm-pad.h: Likewise. * sysdeps/unix/sysv/linux/x86/bits/shm-pad.h: Likewise. * sysdeps/unix/sysv/linux/hppa/bits/shm.h: Remove. * sysdeps/unix/sysv/linux/mips/bits/shm.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/shm.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/shm.h: Likewise. * sysdeps/unix/sysv/linux/x86/bits/shm.h: Likewise. --- sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h | 28 +++++++ sysdeps/unix/sysv/linux/powerpc/bits/shm.h | 110 ------------------------- 2 files changed, 28 insertions(+), 110 deletions(-) create mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h delete mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/shm.h (limited to 'sysdeps/unix/sysv/linux/powerpc/bits') diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h b/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h new file mode 100644 index 0000000000..69a7e4a648 --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/bits/shm-pad.h @@ -0,0 +1,28 @@ +/* Define where padding goes in struct shmid_ds. PowerPC version. + Copyright (C) 2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _SYS_SHM_H +# error "Never use directly; include instead." +#endif + +#include + +#define __SHM_PAD_AFTER_TIME 0 +#define __SHM_PAD_BEFORE_TIME (__WORDSIZE == 32) +#define __SHM_SEGSZ_AFTER_TIME 1 +#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ (__WORDSIZE == 32) diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/shm.h b/sysdeps/unix/sysv/linux/powerpc/bits/shm.h deleted file mode 100644 index a41a1ab33c..0000000000 --- a/sysdeps/unix/sysv/linux/powerpc/bits/shm.h +++ /dev/null @@ -1,110 +0,0 @@ -/* Copyright (C) 1995-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#ifndef _SYS_SHM_H -# error "Never include directly; use instead." -#endif - -#include -#include - -/* Permission flag for shmget. */ -#define SHM_R 0400 /* or S_IRUGO from */ -#define SHM_W 0200 /* or S_IWUGO from */ - -/* Flags for `shmat'. */ -#define SHM_RDONLY 010000 /* attach read-only else read-write */ -#define SHM_RND 020000 /* round attach address to SHMLBA */ -#define SHM_REMAP 040000 /* take-over region on attach */ -#define SHM_EXEC 0100000 /* execution access */ - -/* Commands for `shmctl'. */ -#define SHM_LOCK 11 /* lock segment (root only) */ -#define SHM_UNLOCK 12 /* unlock segment (root only) */ - -__BEGIN_DECLS - - -/* Type to count number of attaches. */ -typedef unsigned long int shmatt_t; - -/* Data structure describing a shared memory segment. */ -struct shmid_ds - { - struct ipc_perm shm_perm; /* operation permission struct */ -#if __WORDSIZE == 32 - unsigned int __glibc_reserved1; -#endif - __time_t shm_atime; /* time of last shmat() */ -#if __WORDSIZE == 32 - unsigned int __glibc_reserved2; -#endif - __time_t shm_dtime; /* time of last shmdt() */ -#if __WORDSIZE == 32 - unsigned int __glibc_reserved3; -#endif - __time_t shm_ctime; /* time of last change by shmctl() */ -#if __WORDSIZE == 32 - unsigned int __glibc_reserved4; -#endif - size_t shm_segsz; /* size of segment in bytes */ - __pid_t shm_cpid; /* pid of creator */ - __pid_t shm_lpid; /* pid of last shmop */ - shmatt_t shm_nattch; /* number of current attaches */ - unsigned long __glibc_reserved5; - unsigned long __glibc_reserved6; - }; - -#ifdef __USE_MISC - -/* ipcs ctl commands */ -# define SHM_STAT 13 -# define SHM_INFO 14 -# define SHM_STAT_ANY 15 - -/* shm_mode upper byte flags */ -# define SHM_DEST 01000 /* segment will be destroyed on last detach */ -# define SHM_LOCKED 02000 /* segment will not be swapped */ -# define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ -# define SHM_NORESERVE 010000 /* don't check for reservations */ - -struct shminfo - { - unsigned long int shmmax; - unsigned long int shmmin; - unsigned long int shmmni; - unsigned long int shmseg; - unsigned long int shmall; - unsigned long int __glibc_reserved1; - unsigned long int __glibc_reserved2; - unsigned long int __glibc_reserved3; - unsigned long int __glibc_reserved4; - }; - -struct shm_info - { - int used_ids; - unsigned long int shm_tot; /* total allocated shm */ - unsigned long int shm_rss; /* total resident shm */ - unsigned long int shm_swp; /* total swapped shm */ - unsigned long int swap_attempts; - unsigned long int swap_successes; - }; - -#endif /* __USE_MISC */ - -__END_DECLS -- cgit 1.4.1