* [PATCH 1/2] Mark unsigned long arguments with U in more syscalls [BZ #25810]
@ 2020-04-29 14:47 H.J. Lu via Libc-alpha
2020-04-29 14:47 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
2020-04-29 14:57 ` [PATCH 1/2] Mark unsigned long arguments with U in more syscalls " Florian Weimer via Libc-alpha
0 siblings, 2 replies; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 14:47 UTC (permalink / raw
To: libc-alpha
Mark unsigned long arguments in mmap, read, recv, recvfrom, send, sendto,
write, ioperm, sendfile64, setxattr, lsetxattr, fsetxattr, getxattr,
lgetxattr, fgetxattr, listxattr, llistxattr and flistxattr with U.
---
sysdeps/unix/syscalls.list | 14 +++++++-------
sysdeps/unix/sysv/linux/syscalls.list | 22 +++++++++++-----------
2 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/sysdeps/unix/syscalls.list b/sysdeps/unix/syscalls.list
index 766d1664aa..7209c24110 100644
--- a/sysdeps/unix/syscalls.list
+++ b/sysdeps/unix/syscalls.list
@@ -39,25 +39,25 @@ listen - listen i:ii __listen listen
lseek - lseek i:iii __libc_lseek __lseek lseek
madvise - madvise i:pUi __madvise madvise
mkdir - mkdir i:si __mkdir mkdir
-mmap - mmap b:aniiii __mmap mmap
+mmap - mmap b:aUiiii __mmap mmap
mprotect - mprotect i:aUi __mprotect mprotect
munmap - munmap i:aU __munmap munmap
open - open Ci:siv __libc_open __open open
profil - profil i:piii __profil profil
ptrace - ptrace i:iiii ptrace
-read - read Ci:ibn __libc_read __read read
+read - read Ci:ibU __libc_read __read read
readlink - readlink i:spU __readlink readlink
readv - readv Ci:ipi __readv readv
reboot - reboot i:i reboot
-recv - recv Ci:ibni __libc_recv recv
-recvfrom - recvfrom Ci:ibniBN __libc_recvfrom __recvfrom recvfrom
+recv - recv Ci:ibUi __libc_recv recv
+recvfrom - recvfrom Ci:ibUiBN __libc_recvfrom __recvfrom recvfrom
recvmsg - recvmsg Ci:ipi __libc_recvmsg __recvmsg recvmsg
rename - rename i:ss rename
rmdir - rmdir i:s __rmdir rmdir
select - select Ci:iPPPP __select __libc_select select
-send - send Ci:ibni __libc_send __send send
+send - send Ci:ibUi __libc_send __send send
sendmsg - sendmsg Ci:ipi __libc_sendmsg __sendmsg sendmsg
-sendto - sendto Ci:ibnibn __libc_sendto __sendto sendto
+sendto - sendto Ci:ibUibn __libc_sendto __sendto sendto
setdomain - setdomainname i:si setdomainname
setegid - setegid i:i __setegid setegid
seteuid - seteuid i:i __seteuid seteuid
@@ -90,5 +90,5 @@ uname - uname i:p __uname uname
unlink - unlink i:s __unlink unlink
utimes - utimes i:sp __utimes utimes
vhangup - vhangup i:i vhangup
-write - write Ci:ibn __libc_write __write write
+write - write Ci:ibU __libc_write __write write
writev - writev Ci:ipi __writev writev
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 1b1010d4c8..5b4e205934 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -28,7 +28,7 @@ inotify_add_watch EXTRA inotify_add_watch i:isi inotify_add_watch
inotify_init EXTRA inotify_init i: inotify_init
inotify_init1 EXTRA inotify_init1 i:I inotify_init1
inotify_rm_watch EXTRA inotify_rm_watch i:ii inotify_rm_watch
-ioperm - ioperm i:iii ioperm
+ioperm - ioperm i:UUi ioperm
iopl - iopl i:i iopl
klogctl EXTRA syslog i:isi klogctl
lchown - lchown i:sii __lchown lchown
@@ -55,7 +55,7 @@ sched_setp - sched_setparam i:ip __sched_setparam sched_setparam
sched_sets - sched_setscheduler i:iip __sched_setscheduler sched_setscheduler
sched_yield - sched_yield i: __sched_yield sched_yield
sendfile - sendfile i:iipU sendfile
-sendfile64 - sendfile64 i:iipi sendfile64
+sendfile64 - sendfile64 i:iipU sendfile64
setfsgid EXTRA setfsgid i:i setfsgid
setfsuid EXTRA setfsuid i:i setfsuid
setpgid - setpgid i:ii __setpgid setpgid
@@ -75,15 +75,15 @@ readlinkat - readlinkat i:issU readlinkat
symlinkat - symlinkat i:sis symlinkat
unlinkat - unlinkat i:isi unlinkat
-setxattr - setxattr i:sspii setxattr
-lsetxattr - lsetxattr i:sspii lsetxattr
-fsetxattr - fsetxattr i:ispii fsetxattr
-getxattr - getxattr i:sspi getxattr
-lgetxattr - lgetxattr i:sspi lgetxattr
-fgetxattr - fgetxattr i:ispi fgetxattr
-listxattr - listxattr i:ssi listxattr
-llistxattr - llistxattr i:ssi llistxattr
-flistxattr - flistxattr i:isi flistxattr
+setxattr - setxattr i:sspUi setxattr
+lsetxattr - lsetxattr i:sspUi lsetxattr
+fsetxattr - fsetxattr i:ispUi fsetxattr
+getxattr - getxattr i:sspU getxattr
+lgetxattr - lgetxattr i:sspU lgetxattr
+fgetxattr - fgetxattr i:ispU fgetxattr
+listxattr - listxattr i:ssU listxattr
+llistxattr - llistxattr i:ssU llistxattr
+flistxattr - flistxattr i:isU flistxattr
removexattr - removexattr i:ss removexattr
lremovexattr - lremovexattr i:ss lremovexattr
fremovexattr - fremovexattr i:is fremovexattr
--
2.25.4
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 14:47 [PATCH 1/2] Mark unsigned long arguments with U in more syscalls [BZ #25810] H.J. Lu via Libc-alpha
@ 2020-04-29 14:47 ` H.J. Lu via Libc-alpha
2020-04-29 14:55 ` Florian Weimer via Libc-alpha
2020-04-29 14:58 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " Florian Weimer via Libc-alpha
2020-04-29 14:57 ` [PATCH 1/2] Mark unsigned long arguments with U in more syscalls " Florian Weimer via Libc-alpha
1 sibling, 2 replies; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 14:47 UTC (permalink / raw
To: libc-alpha
Since the the U marker can only be applied to 2 unsigned long arguments,
add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
which have more than 2 unsigned long arguments.
---
sysdeps/unix/sysv/linux/Makefile | 3 +-
sysdeps/unix/sysv/linux/prctl.c | 39 +++++++++++++++++++++
sysdeps/unix/sysv/linux/process_vm_readv.c | 32 +++++++++++++++++
sysdeps/unix/sysv/linux/process_vm_writev.c | 32 +++++++++++++++++
sysdeps/unix/sysv/linux/syscalls.list | 3 --
5 files changed, 105 insertions(+), 4 deletions(-)
create mode 100644 sysdeps/unix/sysv/linux/prctl.c
create mode 100644 sysdeps/unix/sysv/linux/process_vm_readv.c
create mode 100644 sysdeps/unix/sysv/linux/process_vm_writev.c
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 089a4899d5..1d9a8d3cdb 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -59,7 +59,8 @@ sysdep_routines += adjtimex clone umount umount2 readahead sysctl \
eventfd eventfd_read eventfd_write prlimit \
personality epoll_wait tee vmsplice splice \
open_by_handle_at mlock2 pkey_mprotect pkey_set pkey_get \
- timerfd_gettime timerfd_settime
+ timerfd_gettime timerfd_settime prctl \
+ process_vm_readv process_vm_writev
CFLAGS-gethostid.c = -fexceptions
CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables
diff --git a/sysdeps/unix/sysv/linux/prctl.c b/sysdeps/unix/sysv/linux/prctl.c
new file mode 100644
index 0000000000..e0e5ef4e47
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/prctl.c
@@ -0,0 +1,39 @@
+/* prctl - 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>
+
+extern int prctl (int, unsigned long, unsigned long, unsigned long,
+ unsigned long);
+hidden_proto (prctl)
+extern int __prctl (int, unsigned long, unsigned long, unsigned long,
+ unsigned long);
+hidden_proto (__prctl)
+
+int
+__prctl (int option, unsigned long arg2, unsigned long arg3,
+ unsigned long arg4, unsigned long arg5)
+{
+ return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
+}
+
+hidden_def (__prctl)
+weak_alias (__prctl, prctl)
+hidden_weak (prctl)
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..1e711abe43
--- /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 liovcnt, const struct iovec *remote_iov,
+ unsigned long riovcnt, unsigned long 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..e41058750b
--- /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 liovcnt, const struct iovec *remote_iov,
+ unsigned long riovcnt, unsigned long 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 5b4e205934..1d8893d1b8 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -43,7 +43,6 @@ nfsservctl EXTRA nfsservctl i:ipp __compat_nfsservctl nfsservctl@GLIBC_2.0:GLIBC
pipe - pipe i:f __pipe pipe
pipe2 - pipe2 i:fi __pipe2 pipe2
pivot_root EXTRA pivot_root i:ss pivot_root
-prctl EXTRA prctl i:iiiii __prctl prctl
query_module EXTRA query_module i:sipip __compat_query_module query_module@GLIBC_2.0:GLIBC_2.23
quotactl EXTRA quotactl i:isip quotactl
remap_file_pages - remap_file_pages i:pUiUi __remap_file_pages remap_file_pages
@@ -98,8 +97,6 @@ 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
--
2.25.4
^ permalink raw reply related [flat|nested] 19+ messages in thread
* Re: [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 14:47 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
@ 2020-04-29 14:55 ` Florian Weimer via Libc-alpha
2020-04-29 15:20 ` V2 " H.J. Lu via Libc-alpha
2020-04-29 14:58 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " Florian Weimer via Libc-alpha
1 sibling, 1 reply; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 14:55 UTC (permalink / raw
To: H.J. Lu; +Cc: libc-alpha
* H. J. Lu:
> diff --git a/sysdeps/unix/sysv/linux/prctl.c b/sysdeps/unix/sysv/linux/prctl.c
> new file mode 100644
> index 0000000000..e0e5ef4e47
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/prctl.c
> @@ -0,0 +1,39 @@
> +/* prctl - 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>
> +
> +extern int prctl (int, unsigned long, unsigned long, unsigned long,
> + unsigned long);
> +hidden_proto (prctl)
> +extern int __prctl (int, unsigned long, unsigned long, unsigned long,
> + unsigned long);
> +hidden_proto (__prctl)
> +
> +int
> +__prctl (int option, unsigned long arg2, unsigned long arg3,
> + unsigned long arg4, unsigned long arg5)
unsigned long int everywhere.
> +{
> + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> +}
> +
> +hidden_def (__prctl)
> +weak_alias (__prctl, prctl)
> +hidden_weak (prctl)
Can't you use libc_hidden_proto in include/sys/prctl.h and
libc_hidden_proto here?
> 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..1e711abe43
> --- /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 liovcnt, const struct iovec *remote_iov,
> + unsigned long riovcnt, unsigned long flags)
> +{
> + return INLINE_SYSCALL_CALL (process_vm_readv, pid, local_iov,
> + liovcnt, remote_iov, riovcnt, flags);
> +}
Likewise, unsigned long int.
> +
> 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..e41058750b
> --- /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 liovcnt, const struct iovec *remote_iov,
> + unsigned long riovcnt, unsigned long flags)
> +{
> + return INLINE_SYSCALL_CALL (process_vm_writev, pid, local_iov,
> + liovcnt, remote_iov, riovcnt, flags);
> +}
Likewise.
(I trust the indentation is only wrong in the patch, it's okay when
applied.)
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 1/2] Mark unsigned long arguments with U in more syscalls [BZ #25810]
2020-04-29 14:47 [PATCH 1/2] Mark unsigned long arguments with U in more syscalls [BZ #25810] H.J. Lu via Libc-alpha
2020-04-29 14:47 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
@ 2020-04-29 14:57 ` Florian Weimer via Libc-alpha
1 sibling, 0 replies; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 14:57 UTC (permalink / raw
To: H.J. Lu; +Cc: libc-alpha
* H. J. Lu:
> Mark unsigned long arguments in mmap, read, recv, recvfrom, send, sendto,
> write, ioperm, sendfile64, setxattr, lsetxattr, fsetxattr, getxattr,
> lgetxattr, fgetxattr, listxattr, llistxattr and flistxattr with U.
This looks okay to me.
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 14:47 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
2020-04-29 14:55 ` Florian Weimer via Libc-alpha
@ 2020-04-29 14:58 ` Florian Weimer via Libc-alpha
2020-04-29 15:10 ` H.J. Lu via Libc-alpha
1 sibling, 1 reply; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 14:58 UTC (permalink / raw
To: H.J. Lu; +Cc: libc-alpha
* H. J. Lu:
> Since the the U marker can only be applied to 2 unsigned long arguments,
> add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
> which have more than 2 unsigned long arguments.
I forgot: Please mention syscalls.list somewhere in the commit message,
so that it is clear that the U marker refers to that.
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 14:58 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " Florian Weimer via Libc-alpha
@ 2020-04-29 15:10 ` H.J. Lu via Libc-alpha
2020-04-29 15:18 ` Florian Weimer via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 15:10 UTC (permalink / raw
To: Florian Weimer; +Cc: GNU C Library
On Wed, Apr 29, 2020 at 7:58 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu:
>
> > Since the the U marker can only be applied to 2 unsigned long arguments,
> > add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
> > which have more than 2 unsigned long arguments.
>
> I forgot: Please mention syscalls.list somewhere in the commit message,
> so that it is clear that the U marker refers to that.
>
> Thanks,
> Florian
This is I am going to push:
commit 86f4f2263bf21ff7f80905b3062c16213b016fe6 (HEAD -> master)
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Wed Apr 29 08:08:40 2020 -0700
Mark unsigned long arguments with U in more syscalls [BZ #25810]
Mark unsigned long arguments in mmap, read, recv, recvfrom, send, sendto,
write, ioperm, sendfile64, setxattr, lsetxattr, fsetxattr, getxattr,
lgetxattr, fgetxattr, listxattr, llistxattr and flistxattr with U in
syscalls.list files.
--
H.J.
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:10 ` H.J. Lu via Libc-alpha
@ 2020-04-29 15:18 ` Florian Weimer via Libc-alpha
2020-04-29 15:22 ` H.J. Lu via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:18 UTC (permalink / raw
To: H.J. Lu; +Cc: GNU C Library
* H. J. Lu:
> On Wed, Apr 29, 2020 at 7:58 AM Florian Weimer <fweimer@redhat.com> wrote:
>>
>> * H. J. Lu:
>>
>> > Since the the U marker can only be applied to 2 unsigned long arguments,
>> > add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
>> > which have more than 2 unsigned long arguments.
>>
>> I forgot: Please mention syscalls.list somewhere in the commit message,
>> so that it is clear that the U marker refers to that.
>>
>> Thanks,
>> Florian
>
> This is I am going to push:
>
> commit 86f4f2263bf21ff7f80905b3062c16213b016fe6 (HEAD -> master)
> Author: H.J. Lu <hjl.tools@gmail.com>
> Date: Wed Apr 29 08:08:40 2020 -0700
>
> Mark unsigned long arguments with U in more syscalls [BZ #25810]
>
> Mark unsigned long arguments in mmap, read, recv, recvfrom, send, sendto,
> write, ioperm, sendfile64, setxattr, lsetxattr, fsetxattr, getxattr,
> lgetxattr, fgetxattr, listxattr, llistxattr and flistxattr with U in
> syscalls.list files.
This is for the other commit. In that context, U is clear. It is less
clear for the prctl/process_vm_readv/process_vm_writev commit.
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 14:55 ` Florian Weimer via Libc-alpha
@ 2020-04-29 15:20 ` H.J. Lu via Libc-alpha
2020-04-29 15:22 ` Florian Weimer via Libc-alpha
2020-04-29 15:32 ` Andreas Schwab
0 siblings, 2 replies; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 15:20 UTC (permalink / raw
To: Florian Weimer; +Cc: libc-alpha
On Wed, Apr 29, 2020 at 04:55:43PM +0200, Florian Weimer wrote:
> * H. J. Lu:
>
> > diff --git a/sysdeps/unix/sysv/linux/prctl.c b/sysdeps/unix/sysv/linux/prctl.c
> > new file mode 100644
> > index 0000000000..e0e5ef4e47
> > --- /dev/null
> > +++ b/sysdeps/unix/sysv/linux/prctl.c
> > @@ -0,0 +1,39 @@
> > +/* prctl - 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>
> > +
> > +extern int prctl (int, unsigned long, unsigned long, unsigned long,
> > + unsigned long);
> > +hidden_proto (prctl)
> > +extern int __prctl (int, unsigned long, unsigned long, unsigned long,
> > + unsigned long);
> > +hidden_proto (__prctl)
> > +
> > +int
> > +__prctl (int option, unsigned long arg2, unsigned long arg3,
> > + unsigned long arg4, unsigned long arg5)
>
> unsigned long int everywhere.
Fixed.
>
> > +{
> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> > +}
> > +
> > +hidden_def (__prctl)
> > +weak_alias (__prctl, prctl)
> > +hidden_weak (prctl)
>
> Can't you use libc_hidden_proto in include/sys/prctl.h and
> libc_hidden_proto here?
>
Since include/sys/prctl.h has
extern int __prctl (int __option, ...);
it can't be used.
>
> > 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..1e711abe43
> > --- /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 liovcnt, const struct iovec *remote_iov,
> > + unsigned long riovcnt, unsigned long flags)
> > +{
> > + return INLINE_SYSCALL_CALL (process_vm_readv, pid, local_iov,
> > + liovcnt, remote_iov, riovcnt, flags);
> > +}
>
> Likewise, unsigned long int.
Fixed.
> > +
> > 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..e41058750b
> > --- /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 liovcnt, const struct iovec *remote_iov,
> > + unsigned long riovcnt, unsigned long flags)
> > +{
> > + return INLINE_SYSCALL_CALL (process_vm_writev, pid, local_iov,
> > + liovcnt, remote_iov, riovcnt, flags);
> > +}
>
> Likewise.
Fixed.
>
> (I trust the indentation is only wrong in the patch, it's okay when
> applied.)
>
It is due to spaces vs tab. The indentation is OK.
Ok for master?
Thanks.
H.J.
---
Since the the U marker can only be applied to 2 unsigned long arguments,
add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
which have more than 2 unsigned long arguments.
---
sysdeps/unix/sysv/linux/Makefile | 3 +-
sysdeps/unix/sysv/linux/prctl.c | 39 +++++++++++++++++++++
sysdeps/unix/sysv/linux/process_vm_readv.c | 33 +++++++++++++++++
sysdeps/unix/sysv/linux/process_vm_writev.c | 33 +++++++++++++++++
sysdeps/unix/sysv/linux/syscalls.list | 3 --
5 files changed, 107 insertions(+), 4 deletions(-)
create mode 100644 sysdeps/unix/sysv/linux/prctl.c
create mode 100644 sysdeps/unix/sysv/linux/process_vm_readv.c
create mode 100644 sysdeps/unix/sysv/linux/process_vm_writev.c
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 089a4899d5..1d9a8d3cdb 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -59,7 +59,8 @@ sysdep_routines += adjtimex clone umount umount2 readahead sysctl \
eventfd eventfd_read eventfd_write prlimit \
personality epoll_wait tee vmsplice splice \
open_by_handle_at mlock2 pkey_mprotect pkey_set pkey_get \
- timerfd_gettime timerfd_settime
+ timerfd_gettime timerfd_settime prctl \
+ process_vm_readv process_vm_writev
CFLAGS-gethostid.c = -fexceptions
CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables
diff --git a/sysdeps/unix/sysv/linux/prctl.c b/sysdeps/unix/sysv/linux/prctl.c
new file mode 100644
index 0000000000..6a9c1a8fbf
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/prctl.c
@@ -0,0 +1,39 @@
+/* prctl - 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>
+
+extern int prctl (int, unsigned long int, unsigned long int,
+ unsigned long int, unsigned long int);
+hidden_proto (prctl)
+extern int __prctl (int, unsigned long int, unsigned long int,
+ unsigned long int, unsigned long int);
+hidden_proto (__prctl)
+
+int
+__prctl (int option, unsigned long int arg2, unsigned long int arg3,
+ unsigned long int arg4, unsigned long int arg5)
+{
+ return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
+}
+
+hidden_def (__prctl)
+weak_alias (__prctl, prctl)
+hidden_weak (prctl)
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..dca826b679
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/process_vm_readv.c
@@ -0,0 +1,33 @@
+/* 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..15748451aa
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/process_vm_writev.c
@@ -0,0 +1,33 @@
+/* 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 5b4e205934..1d8893d1b8 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -43,7 +43,6 @@ nfsservctl EXTRA nfsservctl i:ipp __compat_nfsservctl nfsservctl@GLIBC_2.0:GLIBC
pipe - pipe i:f __pipe pipe
pipe2 - pipe2 i:fi __pipe2 pipe2
pivot_root EXTRA pivot_root i:ss pivot_root
-prctl EXTRA prctl i:iiiii __prctl prctl
query_module EXTRA query_module i:sipip __compat_query_module query_module@GLIBC_2.0:GLIBC_2.23
quotactl EXTRA quotactl i:isip quotactl
remap_file_pages - remap_file_pages i:pUiUi __remap_file_pages remap_file_pages
@@ -98,8 +97,6 @@ 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
--
2.25.4
^ permalink raw reply related [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:20 ` V2 " H.J. Lu via Libc-alpha
@ 2020-04-29 15:22 ` Florian Weimer via Libc-alpha
2020-04-29 15:29 ` H.J. Lu via Libc-alpha
2020-04-29 15:32 ` Andreas Schwab
1 sibling, 1 reply; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:22 UTC (permalink / raw
To: H.J. Lu; +Cc: libc-alpha
* H. J. Lu:
>> > +{
>> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
>> > +}
>> > +
>> > +hidden_def (__prctl)
>> > +weak_alias (__prctl, prctl)
>> > +hidden_weak (prctl)
>>
>> Can't you use libc_hidden_proto in include/sys/prctl.h and
>> libc_hidden_proto here?
>>
>
> Since include/sys/prctl.h has
>
> extern int __prctl (int __option, ...);
>
> it can't be used.
I still don't get it. What happens if you use libc_hidden_proto and
libc_hidden_def?
> Since the the U marker can only be applied to 2 unsigned long arguments,
> add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
> which have more than 2 unsigned long arguments.
Please add that syscalls.list reference. Thanks.
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:18 ` Florian Weimer via Libc-alpha
@ 2020-04-29 15:22 ` H.J. Lu via Libc-alpha
2020-04-29 15:25 ` Florian Weimer via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 15:22 UTC (permalink / raw
To: Florian Weimer; +Cc: GNU C Library
On Wed, Apr 29, 2020 at 8:18 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu:
>
> > On Wed, Apr 29, 2020 at 7:58 AM Florian Weimer <fweimer@redhat.com> wrote:
> >>
> >> * H. J. Lu:
> >>
> >> > Since the the U marker can only be applied to 2 unsigned long arguments,
> >> > add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
> >> > which have more than 2 unsigned long arguments.
> >>
> >> I forgot: Please mention syscalls.list somewhere in the commit message,
> >> so that it is clear that the U marker refers to that.
> >>
> >> Thanks,
> >> Florian
> >
> > This is I am going to push:
> >
> > commit 86f4f2263bf21ff7f80905b3062c16213b016fe6 (HEAD -> master)
> > Author: H.J. Lu <hjl.tools@gmail.com>
> > Date: Wed Apr 29 08:08:40 2020 -0700
> >
> > Mark unsigned long arguments with U in more syscalls [BZ #25810]
> >
> > Mark unsigned long arguments in mmap, read, recv, recvfrom, send, sendto,
> > write, ioperm, sendfile64, setxattr, lsetxattr, fsetxattr, getxattr,
> > lgetxattr, fgetxattr, listxattr, llistxattr and flistxattr with U in
> > syscalls.list files.
>
> This is for the other commit. In that context, U is clear. It is less
> clear for the prctl/process_vm_readv/process_vm_writev commit.
How about
Since the the U marker can only be applied to 2 unsigned long arguments
in syscalls.list files, add a C wrapper for prctl, process_vm_readv and
process_vm_writev syscals which have more than 2 unsigned long arguments.
--
H.J.
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:22 ` H.J. Lu via Libc-alpha
@ 2020-04-29 15:25 ` Florian Weimer via Libc-alpha
0 siblings, 0 replies; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:25 UTC (permalink / raw
To: H.J. Lu; +Cc: GNU C Library
* H. J. Lu:
> Since the the U marker can only be applied to 2 unsigned long arguments
> in syscalls.list files, add a C wrapper for prctl, process_vm_readv and
> process_vm_writev syscals which have more than 2 unsigned long
> arguments.
Yes, that's fine. Thanks.
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:22 ` Florian Weimer via Libc-alpha
@ 2020-04-29 15:29 ` H.J. Lu via Libc-alpha
2020-04-29 15:35 ` Florian Weimer via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 15:29 UTC (permalink / raw
To: Florian Weimer; +Cc: GNU C Library
On Wed, Apr 29, 2020 at 8:22 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu:
>
> >> > +{
> >> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> >> > +}
> >> > +
> >> > +hidden_def (__prctl)
> >> > +weak_alias (__prctl, prctl)
> >> > +hidden_weak (prctl)
> >>
> >> Can't you use libc_hidden_proto in include/sys/prctl.h and
> >> libc_hidden_proto here?
> >>
> >
> > Since include/sys/prctl.h has
> >
> > extern int __prctl (int __option, ...);
> >
> > it can't be used.
>
> I still don't get it. What happens if you use libc_hidden_proto and
> libc_hidden_def?
With
extern int __prctl (int __option, ...);
libc_hidden_proto (__prctl)
libc_hidden_proto (prctl)
and
#include <unistd.h>
#include <sysdep.h>
#include <errno.h>
#include <sys/prctl.h>
int
__prctl (int option, unsigned long int arg2, unsigned long int arg3,
unsigned long int arg4, unsigned long int arg5)
{
return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
}
libc_hidden_def (__prctl)
weak_alias (__prctl, prctl)
hidden_weak (prctl)
I got
../sysdeps/unix/sysv/linux/prctl.c:25:1: error: conflicting types for ‘__prctl’
25 | __prctl (int option, unsigned long int arg2, unsigned long int arg3,
| ^~~~~~~
In file included from <command-line>:
../include/sys/prctl.h:7:20: note: previous declaration of ‘__prctl’ was here
7 | libc_hidden_proto (__prctl)
| ^~~~~~~
./../include/libc-symbols.h:541:33: note: in definition of macro
‘__hidden_proto’
541 | extern thread __typeof (name) name __asm__ (__hidden_asmname
(#internal)) \
| ^~~~
./../include/libc-symbols.h:624:44: note: in expansion of macro ‘hidden_proto’
624 | # define libc_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
| ^~~~~~~~~~~~
../include/sys/prctl.h:7:1: note: in expansion of macro ‘libc_hidden_proto’
7 | libc_hidden_proto (__prctl)
| ^~~~~~~~~~~~~~~~~
../sysdeps/unix/sysv/linux/prctl.c:32:22: error: conflicting types for ‘prctl’
32 | weak_alias (__prctl, prctl)
| ^~~~~
./../include/libc-symbols.h:152:26: note: in definition of macro ‘_weak_alias’
152 | extern __typeof (name) aliasname __attribute__ ((weak, alias
(#name))) \
| ^~~~~~~~~
../sysdeps/unix/sysv/linux/prctl.c:32:1: note: in expansion of macro
‘weak_alias’
32 | weak_alias (__prctl, prctl)
| ^~~~~~~~~~
../include/sys/prctl.h:8:20: note: previous declaration of ‘prctl’ was here
8 | libc_hidden_proto (prctl)
| ^~~~~
./../include/libc-symbols.h:541:33: note: in definition of macro
‘__hidden_proto’
541 | extern thread __typeof (name) name __asm__ (__hidden_asmname
(#internal)) \
| ^~~~
./../include/libc-symbols.h:624:44: note: in expansion of macro ‘hidden_proto’
624 | # define libc_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
| ^~~~~~~~~~~~
../include/sys/prctl.h:8:1: note: in expansion of macro ‘libc_hidden_proto’
8 | libc_hidden_proto (prctl)
| ^~~~~~~~~~~~~~~~~
./../include/libc-symbols.h:552:33: error: ‘__EI___prctl’ aliased to
undefined symbol ‘__GI___prctl’
552 | extern thread __typeof (name) __EI_##name \
| ^~~~~
./../include/libc-symbols.h:548:3: note: in expansion of macro ‘__hidden_ver2’
548 | __hidden_ver2 (, local, internal, name)
| ^~~~~~~~~~~~~
./../include/libc-symbols.h:557:29: note: in expansion of macro ‘__hidden_ver1’
557 | # define hidden_def(name) __hidden_ver1(__GI_##name, name, name);
| ^~~~~~~~~~~~~
./../include/libc-symbols.h:626:32: note: in expansion of macro ‘hidden_def’
626 | # define libc_hidden_def(name) hidden_def (name)
| ^~~~~~~~~~
../sysdeps/unix/sysv/linux/prctl.c:31:1: note: in expansion of macro
‘libc_hidden_def’
31 | libc_hidden_def (__prctl)
| ^~~~~~~~~~~~~~~
./../include/libc-symbols.h:552:33: error: ‘__EI_prctl’ aliased to
undefined symbol ‘__GI_prctl’
552 | extern thread __typeof (name) __EI_##name \
| ^~~~~
./../include/libc-symbols.h:548:3: note: in expansion of macro ‘__hidden_ver2’
548 | __hidden_ver2 (, local, internal, name)
| ^~~~~~~~~~~~~
./../include/libc-symbols.h:562:2: note: in expansion of macro ‘__hidden_ver1’
562 | __hidden_ver1(__GI_##name, name, name) __attribute__((weak));
| ^~~~~~~~~~~~~
../sysdeps/unix/sysv/linux/prctl.c:33:1: note: in expansion of macro
‘hidden_weak’
33 | hidden_weak (prctl)
| ^~~~~~~~~~~
> > Since the the U marker can only be applied to 2 unsigned long arguments,
> > add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
> > which have more than 2 unsigned long arguments.
>
> Please add that syscalls.list reference. Thanks.
>
I have
---
Since the the U marker can only be applied to 2 unsigned long arguments
in syscalls.list files, add a C wrapper for prctl, process_vm_readv and
process_vm_writev syscals which have more than 2 unsigned long arguments.
---
--
H.J.
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:20 ` V2 " H.J. Lu via Libc-alpha
2020-04-29 15:22 ` Florian Weimer via Libc-alpha
@ 2020-04-29 15:32 ` Andreas Schwab
2020-04-29 15:36 ` H.J. Lu via Libc-alpha
1 sibling, 1 reply; 19+ messages in thread
From: Andreas Schwab @ 2020-04-29 15:32 UTC (permalink / raw
To: H.J. Lu via Libc-alpha; +Cc: Florian Weimer
On Apr 29 2020, H.J. Lu via Libc-alpha wrote:
>> > +int
>> > +__prctl (int option, unsigned long arg2, unsigned long arg3,
>> > + unsigned long arg4, unsigned long arg5)
>>
>> unsigned long int everywhere.
>
> Fixed.
>
>>
>> > +{
>> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
>> > +}
>> > +
>> > +hidden_def (__prctl)
>> > +weak_alias (__prctl, prctl)
>> > +hidden_weak (prctl)
>>
>> Can't you use libc_hidden_proto in include/sys/prctl.h and
>> libc_hidden_proto here?
>>
>
> Since include/sys/prctl.h has
>
> extern int __prctl (int __option, ...);
>
> it can't be used.
You cannot implement a function declared as varargs with a non-varargs
definition.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:29 ` H.J. Lu via Libc-alpha
@ 2020-04-29 15:35 ` Florian Weimer via Libc-alpha
2020-04-29 15:41 ` Florian Weimer via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:35 UTC (permalink / raw
To: H.J. Lu; +Cc: GNU C Library
* H. J. Lu:
> With
>
> extern int __prctl (int __option, ...);
> libc_hidden_proto (__prctl)
> libc_hidden_proto (prctl)
>
> and
>
> #include <unistd.h>
> #include <sysdep.h>
> #include <errno.h>
> #include <sys/prctl.h>
>
> int
> __prctl (int option, unsigned long int arg2, unsigned long int arg3,
> unsigned long int arg4, unsigned long int arg5)
> {
> return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> }
>
> libc_hidden_def (__prctl)
> weak_alias (__prctl, prctl)
> hidden_weak (prctl)
Please try:
extern int __prctl (int __option, ...);
libc_hidden_proto (__prctl)
And:
int
__prctl (int option, unsigned long int arg2, unsigned long int arg3,
unsigned long int arg4, unsigned long int arg5)
{
return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
}
libc_hidden_def (__prctl)
strong_alias (__prctl, prctl)
Internal users should always use __prctl to avoid linknamespace
failures, so there are no callers of prctl and we don't need a hidden
alias for it.
>> > Since the the U marker can only be applied to 2 unsigned long arguments,
>> > add a C wrapper for prctl, process_vm_readv and process_vm_writev syscals
>> > which have more than 2 unsigned long arguments.
>>
>> Please add that syscalls.list reference. Thanks.
>>
>
> I have
>
> ---
> Since the the U marker can only be applied to 2 unsigned long arguments
> in syscalls.list files, add a C wrapper for prctl, process_vm_readv and
> process_vm_writev syscals which have more than 2 unsigned long arguments.
> ---
Nice.
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:32 ` Andreas Schwab
@ 2020-04-29 15:36 ` H.J. Lu via Libc-alpha
2020-04-29 15:43 ` Florian Weimer via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 15:36 UTC (permalink / raw
To: Andreas Schwab; +Cc: Florian Weimer, H.J. Lu via Libc-alpha
On Wed, Apr 29, 2020 at 8:32 AM Andreas Schwab <schwab@linux-m68k.org> wrote:
>
> On Apr 29 2020, H.J. Lu via Libc-alpha wrote:
>
> >> > +int
> >> > +__prctl (int option, unsigned long arg2, unsigned long arg3,
> >> > + unsigned long arg4, unsigned long arg5)
> >>
> >> unsigned long int everywhere.
> >
> > Fixed.
> >
> >>
> >> > +{
> >> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> >> > +}
> >> > +
> >> > +hidden_def (__prctl)
> >> > +weak_alias (__prctl, prctl)
> >> > +hidden_weak (prctl)
> >>
> >> Can't you use libc_hidden_proto in include/sys/prctl.h and
> >> libc_hidden_proto here?
> >>
> >
> > Since include/sys/prctl.h has
> >
> > extern int __prctl (int __option, ...);
> >
> > it can't be used.
>
> You cannot implement a function declared as varargs with a non-varargs
> definition.
True. There is a separate bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=25896
--
H.J.
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:35 ` Florian Weimer via Libc-alpha
@ 2020-04-29 15:41 ` Florian Weimer via Libc-alpha
0 siblings, 0 replies; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:41 UTC (permalink / raw
To: H.J. Lu; +Cc: GNU C Library
* Florian Weimer:
>> extern int __prctl (int __option, ...);
>> libc_hidden_proto (__prctl)
>> libc_hidden_proto (prctl)
>>
>> and
>>
>> #include <unistd.h>
>> #include <sysdep.h>
>> #include <errno.h>
>> #include <sys/prctl.h>
>>
>> int
>> __prctl (int option, unsigned long int arg2, unsigned long int arg3,
>> unsigned long int arg4, unsigned long int arg5)
>> {
>> return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
>> }
>>
>> libc_hidden_def (__prctl)
>> weak_alias (__prctl, prctl)
>> hidden_weak (prctl)
>
> Please try:
>
> extern int __prctl (int __option, ...);
> libc_hidden_proto (__prctl)
>
> And:
>
> int
> __prctl (int option, unsigned long int arg2, unsigned long int arg3,
> unsigned long int arg4, unsigned long int arg5)
> {
> return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> }
> libc_hidden_def (__prctl)
> strong_alias (__prctl, prctl)
>
> Internal users should always use __prctl to avoid linknamespace
> failures, so there are no callers of prctl and we don't need a hidden
> alias for it.
My bad. I see it know. It's the variadic/non-variadic mismatch.
For the open family of functions, we actually use <stdarg.h> and try to
match the actual argument list. This has caused bugs, so I don't
recommend it.
For fcntl, we unconditionally access the optional arguments, also with
<stdarg.h>. This avoids the bug. Likewise for ptrace.
I think it's safe for the ABIs we support to implement a variadic
function with a non-variadic one. It's needed for implicit function
declaration support. (The converse is definitely unsafe and causes
stack corruption on some targets.)
So perhaps use <stdarg.h> for prctl as well?
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: V2 [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:36 ` H.J. Lu via Libc-alpha
@ 2020-04-29 15:43 ` Florian Weimer via Libc-alpha
2020-04-29 15:52 ` Add C wrappers for process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:43 UTC (permalink / raw
To: H.J. Lu; +Cc: H.J. Lu via Libc-alpha, Andreas Schwab
* H. J. Lu:
> On Wed, Apr 29, 2020 at 8:32 AM Andreas Schwab <schwab@linux-m68k.org> wrote:
>>
>> On Apr 29 2020, H.J. Lu via Libc-alpha wrote:
>>
>> >> > +int
>> >> > +__prctl (int option, unsigned long arg2, unsigned long arg3,
>> >> > + unsigned long arg4, unsigned long arg5)
>> >>
>> >> unsigned long int everywhere.
>> >
>> > Fixed.
>> >
>> >>
>> >> > +{
>> >> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
>> >> > +}
>> >> > +
>> >> > +hidden_def (__prctl)
>> >> > +weak_alias (__prctl, prctl)
>> >> > +hidden_weak (prctl)
>> >>
>> >> Can't you use libc_hidden_proto in include/sys/prctl.h and
>> >> libc_hidden_proto here?
>> >>
>> >
>> > Since include/sys/prctl.h has
>> >
>> > extern int __prctl (int __option, ...);
>> >
>> > it can't be used.
>>
>> You cannot implement a function declared as varargs with a non-varargs
>> definition.
>
> True. There is a separate bug:
>
> https://sourceware.org/bugzilla/show_bug.cgi?id=25896
I suggest to drop prctl from process_vm_*v fix and commit only the
latter now.
Thanks,
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
* Add C wrappers for process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:43 ` Florian Weimer via Libc-alpha
@ 2020-04-29 15:52 ` H.J. Lu via Libc-alpha
2020-04-29 15:55 ` Florian Weimer via Libc-alpha
0 siblings, 1 reply; 19+ messages in thread
From: H.J. Lu via Libc-alpha @ 2020-04-29 15:52 UTC (permalink / raw
To: Florian Weimer; +Cc: H.J. Lu via Libc-alpha, Andreas Schwab
[-- Attachment #1: Type: text/plain, Size: 1349 bytes --]
On Wed, Apr 29, 2020 at 8:43 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu:
>
> > On Wed, Apr 29, 2020 at 8:32 AM Andreas Schwab <schwab@linux-m68k.org> wrote:
> >>
> >> On Apr 29 2020, H.J. Lu via Libc-alpha wrote:
> >>
> >> >> > +int
> >> >> > +__prctl (int option, unsigned long arg2, unsigned long arg3,
> >> >> > + unsigned long arg4, unsigned long arg5)
> >> >>
> >> >> unsigned long int everywhere.
> >> >
> >> > Fixed.
> >> >
> >> >>
> >> >> > +{
> >> >> > + return INLINE_SYSCALL_CALL (prctl, option, arg2, arg3, arg4, arg5);
> >> >> > +}
> >> >> > +
> >> >> > +hidden_def (__prctl)
> >> >> > +weak_alias (__prctl, prctl)
> >> >> > +hidden_weak (prctl)
> >> >>
> >> >> Can't you use libc_hidden_proto in include/sys/prctl.h and
> >> >> libc_hidden_proto here?
> >> >>
> >> >
> >> > Since include/sys/prctl.h has
> >> >
> >> > extern int __prctl (int __option, ...);
> >> >
> >> > it can't be used.
> >>
> >> You cannot implement a function declared as varargs with a non-varargs
> >> definition.
> >
> > True. There is a separate bug:
> >
> > https://sourceware.org/bugzilla/show_bug.cgi?id=25896
>
> I suggest to drop prctl from process_vm_*v fix and commit only the
> latter now.
>
> Thanks,
> Florian
>
Sounds good. I will submit a separate patch for prctl later.
This is I am going to check in.
Thanks.
--
H.J.
[-- Attachment #2: 0001-Add-C-wrappers-for-process_vm_readv-process_vm_write.patch --]
[-- Type: application/x-patch, Size: 5142 bytes --]
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: Add C wrappers for process_vm_readv/process_vm_writev [BZ #25810]
2020-04-29 15:52 ` Add C wrappers for process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
@ 2020-04-29 15:55 ` Florian Weimer via Libc-alpha
0 siblings, 0 replies; 19+ messages in thread
From: Florian Weimer via Libc-alpha @ 2020-04-29 15:55 UTC (permalink / raw
To: H.J. Lu; +Cc: H.J. Lu via Libc-alpha, Andreas Schwab
* H. J. Lu:
> Sounds good. I will submit a separate patch for prctl later.
>
> This is I am going to check in.
Yes, looks good, thanks.
Florian
^ permalink raw reply [flat|nested] 19+ messages in thread
end of thread, other threads:[~2020-04-29 15:55 UTC | newest]
Thread overview: 19+ messages (download: mbox.gz follow: Atom feed
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2020-04-29 14:47 [PATCH 1/2] Mark unsigned long arguments with U in more syscalls [BZ #25810] H.J. Lu via Libc-alpha
2020-04-29 14:47 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
2020-04-29 14:55 ` Florian Weimer via Libc-alpha
2020-04-29 15:20 ` V2 " H.J. Lu via Libc-alpha
2020-04-29 15:22 ` Florian Weimer via Libc-alpha
2020-04-29 15:29 ` H.J. Lu via Libc-alpha
2020-04-29 15:35 ` Florian Weimer via Libc-alpha
2020-04-29 15:41 ` Florian Weimer via Libc-alpha
2020-04-29 15:32 ` Andreas Schwab
2020-04-29 15:36 ` H.J. Lu via Libc-alpha
2020-04-29 15:43 ` Florian Weimer via Libc-alpha
2020-04-29 15:52 ` Add C wrappers for process_vm_readv/process_vm_writev " H.J. Lu via Libc-alpha
2020-04-29 15:55 ` Florian Weimer via Libc-alpha
2020-04-29 14:58 ` [PATCH 2/2] Add C wrappers for prctl/process_vm_readv/process_vm_writev " Florian Weimer via Libc-alpha
2020-04-29 15:10 ` H.J. Lu via Libc-alpha
2020-04-29 15:18 ` Florian Weimer via Libc-alpha
2020-04-29 15:22 ` H.J. Lu via Libc-alpha
2020-04-29 15:25 ` Florian Weimer via Libc-alpha
2020-04-29 14:57 ` [PATCH 1/2] Mark unsigned long arguments with U in more syscalls " Florian Weimer via Libc-alpha
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