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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-11-11 15:00:03 -0200 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-05-11 15:49:10 -0300 |
commit | b41152d716ee9c5ba34495a54e64ea2b732139b5 (patch) | |
tree | d331460ab1b75ffd5ac6accfe8357e8d7c0430a6 /sysdeps | |
parent | 0f01acb340a0544cb0bc5953e81455c68859946e (diff) | |
download | glibc-b41152d716ee9c5ba34495a54e64ea2b732139b5.zip glibc-b41152d716ee9c5ba34495a54e64ea2b732139b5.tar.gz glibc-b41152d716ee9c5ba34495a54e64ea2b732139b5.tar.bz2 |
Consolidate Linux open implementation
This patch consolidates the open Linux syscall implementation on
sysdeps/unix/sysv/linux/open{64}.c. The changes are:
1. Remove open{64} from auto-generation syscalls.list.
2. Add a new open{64}.c implementation. For architectures that
define __OFF_T_MATCHES_OFF64_T the default open64 will create
alias to required open symbols.
3. Use __NR_openat as default syscall for open{64}.
Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/generic/open.c: Remove file.
* sysdeps/unix/sysv/linux/generic/open64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/open64.c: Likewise.
* sysdeps/unix/sysv/linux/open.c: New file.
* sysdeps/unix/sysv/linux/open64.c (__libc_open64): Use O_LARGEFILE
only for __OFF_T_MATCHES_OFF64_T and add alias to open if the case.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Remove open
from auto-generated list.
Diffstat (limited to 'sysdeps')
-rw-r--r-- | sysdeps/unix/sysv/linux/generic/open64.c | 44 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/open.c (renamed from sysdeps/unix/sysv/linux/generic/open.c) | 25 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/open64.c | 24 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/wordsize-64/open64.c | 1 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/wordsize-64/syscalls.list | 1 |
5 files changed, 27 insertions, 68 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/open64.c b/sysdeps/unix/sysv/linux/generic/open64.c deleted file mode 100644 index 88312a1..0000000 --- a/sysdeps/unix/sysv/linux/generic/open64.c +++ /dev/null @@ -1,44 +0,0 @@ -/* Copyright (C) 2011-2017 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 - 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 <errno.h> -#include <fcntl.h> -#include <stdarg.h> -#include <stdio.h> -#include <sysdep-cancel.h> - -/* Open FILE with access OFLAG. If O_CREAT or O_TMPFILE is in OFLAG, - a third argument is the file protection. */ -int -__libc_open64 (const char *file, int oflag, ...) -{ - int mode = 0; - - if (__OPEN_NEEDS_MODE (oflag)) - { - va_list arg; - va_start (arg, oflag); - mode = va_arg (arg, int); - va_end (arg); - } - - return SYSCALL_CANCEL (openat, AT_FDCWD, file, oflag | O_LARGEFILE, mode); -} -weak_alias (__libc_open64, __open64) -libc_hidden_weak (__open64) -weak_alias (__libc_open64, open64) diff --git a/sysdeps/unix/sysv/linux/generic/open.c b/sysdeps/unix/sysv/linux/open.c index 10cdbe0..b3912d5 100644 --- a/sysdeps/unix/sysv/linux/generic/open.c +++ b/sysdeps/unix/sysv/linux/open.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2011-2017 Free Software Foundation, Inc. +/* Copyright (C) 2017 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. @@ -16,12 +16,15 @@ License along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */ -#include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> #include <fcntl.h> #include <stdarg.h> -#include <stdio.h> + #include <sysdep-cancel.h> +#ifndef __OFF_T_MATCHES_OFF64_T + /* Open FILE with access OFLAG. If O_CREAT or O_TMPFILE is in OFLAG, a third argument is the file protection. */ int @@ -45,18 +48,4 @@ weak_alias (__libc_open, __open) libc_hidden_weak (__open) weak_alias (__libc_open, open) -int -__open_nocancel (const char *file, int oflag, ...) -{ - int mode = 0; - - if (__OPEN_NEEDS_MODE (oflag)) - { - va_list arg; - va_start (arg, oflag); - mode = va_arg (arg, int); - va_end (arg); - } - - return INLINE_SYSCALL (openat, 4, AT_FDCWD, file, oflag, mode); -} +#endif diff --git a/sysdeps/unix/sysv/linux/open64.c b/sysdeps/unix/sysv/linux/open64.c index 5e209ee..fcac984 100644 --- a/sysdeps/unix/sysv/linux/open64.c +++ b/sysdeps/unix/sysv/linux/open64.c @@ -15,10 +15,11 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> #include <fcntl.h> #include <stdarg.h> -#include <stdio.h> + #include <sysdep-cancel.h> /* Open FILE with access OFLAG. If O_CREAT or O_TMPFILE is in OFLAG, @@ -36,8 +37,23 @@ __libc_open64 (const char *file, int oflag, ...) va_end (arg); } - return SYSCALL_CANCEL (open, file, oflag | O_LARGEFILE, mode); +#ifdef __OFF_T_MATCHES_OFF64_T +# define EXTRA_OPEN_FLAGS 0 +#else +# define EXTRA_OPEN_FLAGS O_LARGEFILE +#endif + + return SYSCALL_CANCEL (openat, AT_FDCWD, file, oflag | EXTRA_OPEN_FLAGS, + mode); } -weak_alias (__libc_open64, __open64) + +strong_alias (__libc_open64, __open64) libc_hidden_weak (__open64) weak_alias (__libc_open64, open64) + +#ifdef __OFF_T_MATCHES_OFF64_T +strong_alias (__libc_open64, __libc_open) +strong_alias (__libc_open64, __open) +libc_hidden_weak (__open) +weak_alias (__libc_open64, open) +#endif diff --git a/sysdeps/unix/sysv/linux/wordsize-64/open64.c b/sysdeps/unix/sysv/linux/wordsize-64/open64.c deleted file mode 100644 index 0abe30e..0000000 --- a/sysdeps/unix/sysv/linux/wordsize-64/open64.c +++ /dev/null @@ -1 +0,0 @@ -/* Defined in open syscall. */ diff --git a/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list b/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list index 0c60647..6549ed8 100644 --- a/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list +++ b/sysdeps/unix/sysv/linux/wordsize-64/syscalls.list @@ -6,7 +6,6 @@ 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 -open - open Ci:siv __libc_open __open open __open64 open64 prlimit EXTRA prlimit64 i:iipp prlimit prlimit64 fanotify_mark EXTRA fanotify_mark i:iiiis fanotify_mark |