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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2016-11-11 14:50:03 -0200
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-05-11 17:27:27 -0300
commitcab6e5af9d51d4398522af782e20c743daf37461 (patch)
tree3b4a9bc59b3798cfc8117c960b74acc4cda712c6 /sysdeps
parentb41152d716ee9c5ba34495a54e64ea2b732139b5 (diff)
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Consolidate Linux creat implementation
This patch consolidates the creat Linux syscall implementation on sysdeps/unix/sysv/linux/creat{64}.c. The changes are: 1. Remove creat{64} from auto-generation syscalls.list. 2. Add a new creat{64}.c implementation. For architectures that define __OFF_T_MATCHES_OFF64_T the default creat64 will create alias to required creat symbols. 3. Use __NR_creat where possible, otherwise use internal open{64} call with expected flags. Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32, arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu. * io/Makefile (CFLAGS-creat.c): New rule. (CFLAGS-creat64.c): Likewise. * sysdeps/unix/sysv/linux/alpha/creat.c: Remove file. * sysdeps/unix/sysv/linux/generic/creat.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/creat64.c: Likewise. * sysdeps/unix/sysv/linux/creat.c: New file. * sysdeps/unix/sysv/linux/creat64.c: Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Remove create from auto-generated list. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/alpha/creat.c8
-rw-r--r--sysdeps/unix/sysv/linux/creat.c (renamed from sysdeps/unix/sysv/linux/generic/creat.c)17
-rw-r--r--sysdeps/unix/sysv/linux/creat64.c41
-rw-r--r--sysdeps/unix/sysv/linux/syscalls.list1
-rw-r--r--sysdeps/unix/sysv/linux/wordsize-64/creat64.c1
-rw-r--r--sysdeps/unix/sysv/linux/wordsize-64/syscalls.list1
6 files changed, 51 insertions, 18 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/creat.c b/sysdeps/unix/sysv/linux/alpha/creat.c
deleted file mode 100644
index 7a5afed..0000000
--- a/sysdeps/unix/sysv/linux/alpha/creat.c
+++ /dev/null
@@ -1,8 +0,0 @@
-/* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list defines creat and
- creat64 for most linux targets, but on alpha creat is not a syscall.
- If we do nothing, we'll wind up with creat64 being undefined, because
- the syscalls.list assumes the creat->creat64 alias was created. We
- could have overridden that with a create64.c, but we might as well do
- the right thing and set up creat64 as an alias. */
-#include <io/creat.c>
-weak_alias(creat, creat64)
diff --git a/sysdeps/unix/sysv/linux/generic/creat.c b/sysdeps/unix/sysv/linux/creat.c
index 34cb210..31e0248 100644
--- a/sysdeps/unix/sysv/linux/generic/creat.c
+++ b/sysdeps/unix/sysv/linux/creat.c
@@ -1,6 +1,6 @@
-/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
+/* Linux default implementation for creat.
+ Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -18,20 +18,23 @@
#include <fcntl.h>
#include <sys/types.h>
+
#include <sysdep-cancel.h>
-#undef creat
+#ifndef __OFF_T_MATCHES_OFF64_T
/* Create FILE with protections MODE. */
int
-creat (const char *file, mode_t mode)
+__creat (const char *file, mode_t mode)
{
+# ifdef __NR_creat
+ return SYSCALL_CANCEL (creat, file, mode);
+# else
return __open (file, O_WRONLY | O_CREAT | O_TRUNC, mode);
+# endif
}
+weak_alias (__creat, creat)
-/* __open handles cancellation. */
LIBC_CANCEL_HANDLED ();
-#if __WORDSIZE == 64
-weak_alias (creat, creat64)
#endif
diff --git a/sysdeps/unix/sysv/linux/creat64.c b/sysdeps/unix/sysv/linux/creat64.c
new file mode 100644
index 0000000..709c660
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/creat64.c
@@ -0,0 +1,41 @@
+/* Linux default implementation for LFS creat.
+ Copyright (C) 2017 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sysdep-cancel.h>
+
+/* Create FILE with protections MODE. */
+int
+__creat64 (const char *file, mode_t mode)
+{
+#if defined __OFF_T_MATCHES_OFF64_T && defined __NR_creat
+ return SYSCALL_CANCEL (creat, file, mode);
+#else
+ /* We need to pass O_LARGEFILE. */
+ return __open64 (file, O_WRONLY | O_CREAT | O_TRUNC, mode);
+#endif
+}
+weak_alias (__creat64, creat64)
+
+#ifdef __OFF_T_MATCHES_OFF64_T
+strong_alias (__creat64, __creat)
+weak_alias (__creat64, creat)
+#endif
+
+LIBC_CANCEL_HANDLED ();
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 1a10903..f4abf3e 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -6,7 +6,6 @@ bdflush EXTRA bdflush i:ii __compat_bdflush bdflush@GLIBC_2.0:GLIBC_2.23
capget EXTRA capget i:pp capget
capset EXTRA capset i:pp capset
clock_adjtime EXTRA clock_adjtime i:ip clock_adjtime
-creat - creat Ci:si creat
create_module EXTRA create_module 3 __compat_create_module create_module@GLIBC_2.0:GLIBC_2.23
delete_module EXTRA delete_module 3 delete_module
epoll_create EXTRA epoll_create i:i epoll_create
diff --git a/sysdeps/unix/sysv/linux/wordsize-64/creat64.c b/sysdeps/unix/sysv/linux/wordsize-64/creat64.c
deleted file mode 100644
index c106e2b..0000000
--- a/sysdeps/unix/sysv/linux/wordsize-64/creat64.c
+++ /dev/null
@@ -1 +0,0 @@
-/* Defined as alias for the syscall. */
diff --git a/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list b/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list
index 6549ed8..5c78677 100644
--- a/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list
@@ -5,7 +5,6 @@ statfs - statfs i:sp __statfs statfs statfs64
readahead - readahead i:iii __readahead readahead
sendfile - sendfile i:iipi sendfile sendfile64
sync_file_range - sync_file_range Ci:iiii sync_file_range
-creat - creat Ci:si creat creat64
prlimit EXTRA prlimit64 i:iipp prlimit prlimit64
fanotify_mark EXTRA fanotify_mark i:iiiis fanotify_mark