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From: H.J. Lu <hjl@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/release/2.30/master] Add C wrappers for process_vm_readv/process_vm_writev [BZ #25810] Date: Thu, 7 May 2020 12:25:05 +0000 (GMT) [thread overview] Message-ID: <20200507122505.8C6FD386F46B@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=bc33a4d53c1ef7207e718cc1243f2b38956cfd6f commit bc33a4d53c1ef7207e718cc1243f2b38956cfd6f Author: H.J. Lu <hjl.tools@gmail.com> Date: Wed Apr 29 13:20:27 2020 -0700 Add C wrappers for process_vm_readv/process_vm_writev [BZ #25810] Since the the U marker can only be applied to 2 unsigned long arguments in syscalls.list files, add a C wrapper for process_vm_readv and process_vm_writev syscals which have more than 2 unsigned long arguments. (cherry picked from commit ad9fd65d716f1ccd757b6b2feeee826d0f187ed4) Diff: --- sysdeps/unix/sysv/linux/Makefile | 3 ++- sysdeps/unix/sysv/linux/process_vm_readv.c | 32 +++++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/process_vm_writev.c | 32 +++++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/syscalls.list | 2 -- 4 files changed, 66 insertions(+), 3 deletions(-) diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index a7980a60f6..92e0bac384 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -18,7 +18,8 @@ sysdep_routines += clone umount umount2 readahead \ setfsuid setfsgid epoll_pwait signalfd \ eventfd eventfd_read eventfd_write prlimit \ personality epoll_wait tee vmsplice splice \ - open_by_handle_at mlock2 pkey_mprotect pkey_set pkey_get + open_by_handle_at mlock2 pkey_mprotect pkey_set pkey_get \ + process_vm_readv process_vm_writev CFLAGS-gethostid.c = -fexceptions CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables diff --git a/sysdeps/unix/sysv/linux/process_vm_readv.c b/sysdeps/unix/sysv/linux/process_vm_readv.c new file mode 100644 index 0000000000..e1377f7e50 --- /dev/null +++ b/sysdeps/unix/sysv/linux/process_vm_readv.c @@ -0,0 +1,32 @@ +/* process_vm_readv - Linux specific syscall. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <unistd.h> +#include <sysdep.h> +#include <errno.h> +#include <sys/uio.h> + +ssize_t +process_vm_readv (pid_t pid, const struct iovec *local_iov, + unsigned long int liovcnt, + const struct iovec *remote_iov, + unsigned long int riovcnt, unsigned long int flags) +{ + return INLINE_SYSCALL_CALL (process_vm_readv, pid, local_iov, + liovcnt, remote_iov, riovcnt, flags); +} diff --git a/sysdeps/unix/sysv/linux/process_vm_writev.c b/sysdeps/unix/sysv/linux/process_vm_writev.c new file mode 100644 index 0000000000..944ab9b7f1 --- /dev/null +++ b/sysdeps/unix/sysv/linux/process_vm_writev.c @@ -0,0 +1,32 @@ +/* process_vm_writev - Linux specific syscall. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <unistd.h> +#include <sysdep.h> +#include <errno.h> +#include <sys/uio.h> + +ssize_t +process_vm_writev (pid_t pid, const struct iovec *local_iov, + unsigned long int liovcnt, + const struct iovec *remote_iov, + unsigned long int riovcnt, unsigned long int flags) +{ + return INLINE_SYSCALL_CALL (process_vm_writev, pid, local_iov, + liovcnt, remote_iov, riovcnt, flags); +} diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index 198d13c08f..b9067114da 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -105,8 +105,6 @@ name_to_handle_at EXTRA name_to_handle_at i:isppi name_to_handle_at setns EXTRA setns i:ii setns -process_vm_readv EXTRA process_vm_readv i:ipipii process_vm_readv -process_vm_writev EXTRA process_vm_writev i:ipipii process_vm_writev memfd_create EXTRA memfd_create i:si memfd_create pkey_alloc EXTRA pkey_alloc i:ii pkey_alloc pkey_free EXTRA pkey_free i:i pkey_free
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