From cab6e5af9d51d4398522af782e20c743daf37461 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Fri, 11 Nov 2016 14:50:03 -0200 Subject: 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. --- sysdeps/unix/sysv/linux/alpha/creat.c | 8 ----- sysdeps/unix/sysv/linux/creat.c | 40 ++++++++++++++++++++++ sysdeps/unix/sysv/linux/creat64.c | 41 +++++++++++++++++++++++ sysdeps/unix/sysv/linux/generic/creat.c | 37 -------------------- sysdeps/unix/sysv/linux/syscalls.list | 1 - sysdeps/unix/sysv/linux/wordsize-64/creat64.c | 1 - sysdeps/unix/sysv/linux/wordsize-64/syscalls.list | 1 - 7 files changed, 81 insertions(+), 48 deletions(-) delete mode 100644 sysdeps/unix/sysv/linux/alpha/creat.c create mode 100644 sysdeps/unix/sysv/linux/creat.c create mode 100644 sysdeps/unix/sysv/linux/creat64.c delete mode 100644 sysdeps/unix/sysv/linux/generic/creat.c delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/creat64.c (limited to 'sysdeps/unix') diff --git a/sysdeps/unix/sysv/linux/alpha/creat.c b/sysdeps/unix/sysv/linux/alpha/creat.c deleted file mode 100644 index 7a5afed58c..0000000000 --- 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 -weak_alias(creat, creat64) diff --git a/sysdeps/unix/sysv/linux/creat.c b/sysdeps/unix/sysv/linux/creat.c new file mode 100644 index 0000000000..31e024838c --- /dev/null +++ b/sysdeps/unix/sysv/linux/creat.c @@ -0,0 +1,40 @@ +/* Linux default implementation for 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 + . */ + +#include +#include + +#include + +#ifndef __OFF_T_MATCHES_OFF64_T + +/* Create FILE with protections MODE. */ +int +__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) + +LIBC_CANCEL_HANDLED (); + +#endif diff --git a/sysdeps/unix/sysv/linux/creat64.c b/sysdeps/unix/sysv/linux/creat64.c new file mode 100644 index 0000000000..709c66091a --- /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 + . */ + +#include +#include +#include + +/* 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/generic/creat.c b/sysdeps/unix/sysv/linux/generic/creat.c deleted file mode 100644 index 34cb210e77..0000000000 --- a/sysdeps/unix/sysv/linux/generic/creat.c +++ /dev/null @@ -1,37 +0,0 @@ -/* Copyright (C) 2011-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf , 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 - . */ - -#include -#include -#include - -#undef creat - -/* Create FILE with protections MODE. */ -int -creat (const char *file, mode_t mode) -{ - return __open (file, O_WRONLY | O_CREAT | O_TRUNC, mode); -} - -/* __open handles cancellation. */ -LIBC_CANCEL_HANDLED (); - -#if __WORDSIZE == 64 -weak_alias (creat, creat64) -#endif diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index 1a1090311c..f4abf3e6c8 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 c106e2b362..0000000000 --- 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 6549ed8258..5c78677d77 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 -- cgit v1.2.3