Adhemerval Zanella c79a72aa5c posix: Fix and simplify default p{read,write}v implementation ... Currently all architectures but microblaze use wire-up syscall for p{readv,write}v. Microblaze still uses the syscall emulation using sysdep/posix/p{readv,writev}.c and it was reported in some ocasions [1] [2] that it might have some issues with some linux specific usage (mainly with O_DIRECT and the alignment requirement). Although it is not an issue for virtually all the system, this patch refactors the sysdeps/posix p{read,write}v syscall to avoid such issue (by using posix_memalign on the buffer used on p{read,write} call) and by refactoring it common files to avoid the need check on defines to correct set the alias and internal symbols. Checked on microblaze-linux-gnu check with run-built-tests=no and by using the sysdeps/posix implementation on x86_64-linux-gnu (just for sanity test where it shown no regression). * sysdeps/posix/preadv.c: Use sysdeps/posix/preadv_common.c. * sysdeps/posix/preadv64.c: Likewise. * sysdeps/unix/sysv/linux/preadv.c: Likewise. * sysdeps/unix/sysv/linux/preadv64.c: Likewise. * sysdeps/posix/pwritev.c: Use sysdeps/posix/pwritev_common.c. * sysdeps/posix/pwritev64.c: Likewise. * sysdeps/unix/sysv/linux/pwritev.c: Likewise. * sysdeps/unix/sysv/linux/pwritev64.c: Likewise. * sysdeps/posix/preadv_common.c: New file. * sysdeps/posix/pwritev_common.c: Likewise. [1] http://www.mail-archive.com/qemu-devel@nongnu.org/msg25282.html [2] https://bugzilla.redhat.com/show_bug.cgi?id=563103#c8		2017-05-15 16:33:45 -03:00
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linux	posix: Fix and simplify default p{read,write}v implementation	2017-05-15 16:33:45 -03:00