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glibc/sysdeps
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Joseph Myers 729f34028a 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 <bits/shm-pad.h>.
	(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.
2018-10-17 11:56:28 +00:00
..
aarch64 Remove extra space at end of line. 2018-10-16 11:02:03 -07:00
alpha Use copysign functions not __copysign functions in glibc libm. 2018-09-27 20:04:48 +00:00
arm Add new exp and exp2 implementations 2018-09-05 16:22:00 +01:00
generic libio: Flush stream at freopen (BZ#21037) 2018-10-02 10:01:56 -03:00
gnu Update netinet/udp.h from Linux 4.18. 2018-08-27 13:43:05 +00:00
hppa Move SNAN_TESTS_PRESERVE_PAYLOAD out of math-tests.h. 2018-08-01 11:21:16 +00:00
htl hurd: Avoid PLTs for __pthread_get/setspecific 2018-08-09 01:28:55 +02:00
hurd Fix ISO C threads installed header and HURD assumption 2018-07-25 17:27:45 -03:00
i386 Remove unnecessary math_private.h includes. 2018-09-28 21:53:33 +00:00
ia64 Remove unnecessary math_private.h includes. 2018-09-28 21:53:33 +00:00
ieee754 Fix libnldbl_nonshared.a references to internal libm symbols (bug 23735). 2018-10-04 12:16:05 +00:00
init_array sysdeps/init_array: Add PREINIT_FUNCTION to crti.S 2018-01-29 10:22:26 -08:00
m68k Use trunc functions not __trunc functions in glibc libm. 2018-09-20 21:11:10 +00:00
mach hurd: Fix exec usage of mach_setup_thread 2018-08-01 00:10:03 +02:00
microblaze Mark _init and _fini as hidden [BZ #23145] 2018-06-08 10:28:52 -07:00
mips Split fenv_private.h out of math_private.h more consistently. 2018-08-28 20:48:49 +00:00
nios2 Move EXCEPTION_TESTS_* out of math-tests.h 2018-08-23 23:41:13 +00:00
nptl Fix race in pthread_mutex_lock while promoting to PTHREAD_MUTEX_ELISION_NP [BZ #23275] 2018-10-17 12:23:04 +02:00
posix Fix Linux fcntl OFD locks for non-LFS architectures (BZ#20251) 2018-06-26 13:22:53 -03:00
powerpc Remove unnecessary math_private.h includes. 2018-09-28 21:53:33 +00:00
pthread hurd: fix sigevent's sigev_notify_attributes field type 2018-04-19 21:43:44 +02:00
riscv Remove unnecessary math_private.h includes. 2018-09-28 21:53:33 +00:00
s390 S390: Regenerate ULPs. 2018-09-06 14:29:01 +02:00
sh Update SH libm-tests-ulps 2018-07-31 10:33:53 -03:00
sparc Use copysign functions not __copysign functions in glibc libm. 2018-09-27 20:04:48 +00:00
unix Use single bits/shm.h for all architectures. 2018-10-17 11:56:28 +00:00
wordsize-32 Use libc_hidden_* for strtoumax (bug 15105). 2018-02-28 14:16:21 +00:00
wordsize-64 Don't reduce test timeout to less than default 2018-10-17 09:34:13 +02:00
x86 Use round functions not __round functions in glibc libm. 2018-09-27 12:35:23 +00:00
x86_64 Use trunc functions not __trunc functions in glibc libm. 2018-09-20 21:11:10 +00:00