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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-05-02 14:39:58 -0300 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-05-15 16:33:45 -0300 |
commit | c79a72aa5cb8357c216a71015c7448a9259c8531 (patch) | |
tree | caa8eba1f2827c9aa553c3543e85ada1ea4e37e7 /sysdeps/unix | |
parent | cdd45522b6e87369afc341402bda7a95bdf83380 (diff) | |
download | glibc-c79a72aa5cb8357c216a71015c7448a9259c8531.tar.gz glibc-c79a72aa5cb8357c216a71015c7448a9259c8531.tar.xz glibc-c79a72aa5cb8357c216a71015c7448a9259c8531.zip |
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
Diffstat (limited to 'sysdeps/unix')
-rw-r--r-- | sysdeps/unix/sysv/linux/preadv.c | 2 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/preadv64.c | 2 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/pwritev.c | 2 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/pwritev64.c | 2 |
4 files changed, 4 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/preadv.c b/sysdeps/unix/sysv/linux/preadv.c index ccfe7636d6..7d971cc7b3 100644 --- a/sysdeps/unix/sysv/linux/preadv.c +++ b/sysdeps/unix/sysv/linux/preadv.c @@ -48,6 +48,6 @@ preadv (int fd, const struct iovec *vector, int count, off_t offset) # define PREADV static internal_function __atomic_preadv_replacement # define PREAD __pread # define OFF_T off_t -# include <sysdeps/posix/preadv.c> +# include <sysdeps/posix/preadv_common.c> # endif /* __ASSUME_PREADV */ #endif diff --git a/sysdeps/unix/sysv/linux/preadv64.c b/sysdeps/unix/sysv/linux/preadv64.c index 979db95571..66daa74ded 100644 --- a/sysdeps/unix/sysv/linux/preadv64.c +++ b/sysdeps/unix/sysv/linux/preadv64.c @@ -46,7 +46,7 @@ preadv64 (int fd, const struct iovec *vector, int count, off64_t offset) # define PREADV static internal_function __atomic_preadv64_replacement # define PREAD __pread64 # define OFF_T off64_t -# include <sysdeps/posix/preadv.c> +# include <sysdeps/posix/preadv_common.c> #endif #ifdef __OFF_T_MATCHES_OFF64_T diff --git a/sysdeps/unix/sysv/linux/pwritev.c b/sysdeps/unix/sysv/linux/pwritev.c index 2789943760..ce02996a0b 100644 --- a/sysdeps/unix/sysv/linux/pwritev.c +++ b/sysdeps/unix/sysv/linux/pwritev.c @@ -48,6 +48,6 @@ pwritev (int fd, const struct iovec *vector, int count, off_t offset) # define PWRITEV static internal_function __atomic_pwritev_replacement # define PWRITE __pwrite # define OFF_T off_t -# include <sysdeps/posix/pwritev.c> +# include <sysdeps/posix/pwritev_common.c> # endif /* __ASSUME_PREADV */ #endif diff --git a/sysdeps/unix/sysv/linux/pwritev64.c b/sysdeps/unix/sysv/linux/pwritev64.c index 1e3a36ca58..45fb90b0d7 100644 --- a/sysdeps/unix/sysv/linux/pwritev64.c +++ b/sysdeps/unix/sysv/linux/pwritev64.c @@ -46,7 +46,7 @@ pwritev64 (int fd, const struct iovec *vector, int count, off64_t offset) # define PWRITEV static internal_function __atomic_pwritev64_replacement # define PWRITE __pwrite64 # define OFF_T off64_t -# include <sysdeps/posix/pwritev.c> +# include <sysdeps/posix/pwritev_common.c> #endif #ifdef __OFF_T_MATCHES_OFF64_T |