From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: linux-snps-arc@lists.infradead.org
Cc: Christian Brauner <christian@brauner.io>,
Arnd Bergmann <arnd@arndb.de>,
linux-kernel@vger.kernel.org,
linux-arch <linux-arch@vger.kernel.org>,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH] ARC: wireup clone3 syscall
Date: Wed, 15 Jan 2020 16:09:48 -0800 [thread overview]
Message-ID: <20200116000948.17646-1-vgupta@synopsys.com> (raw)
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/syscalls.h | 1 +
arch/arc/include/uapi/asm/unistd.h | 1 +
arch/arc/kernel/entry.S | 12 ++++++++++++
arch/arc/kernel/process.c | 7 +++----
arch/arc/kernel/sys.c | 1 +
6 files changed, 19 insertions(+), 4 deletions(-)
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 26108ea785c2..c4409eab07a9 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -28,6 +28,7 @@ config ARC
select GENERIC_SMP_IDLE_THREAD
select HAVE_ARCH_KGDB
select HAVE_ARCH_TRACEHOOK
+ select HAVE_COPY_THREAD_TLS
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DEBUG_KMEMLEAK
select HAVE_FUTEX_CMPXCHG if FUTEX
diff --git a/arch/arc/include/asm/syscalls.h b/arch/arc/include/asm/syscalls.h
index 7ddba13e9b59..c3f4714a4f5c 100644
--- a/arch/arc/include/asm/syscalls.h
+++ b/arch/arc/include/asm/syscalls.h
@@ -11,6 +11,7 @@
#include <linux/types.h>
int sys_clone_wrapper(int, int, int, int, int);
+int sys_clone3_wrapper(void *, size_t);
int sys_cacheflush(uint32_t, uint32_t uint32_t);
int sys_arc_settls(void *);
int sys_arc_gettls(void);
diff --git a/arch/arc/include/uapi/asm/unistd.h b/arch/arc/include/uapi/asm/unistd.h
index 5eafa1115162..fa2713ae6bea 100644
--- a/arch/arc/include/uapi/asm/unistd.h
+++ b/arch/arc/include/uapi/asm/unistd.h
@@ -21,6 +21,7 @@
#define __ARCH_WANT_SET_GET_RLIMIT
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_CLONE3
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_TIME32_SYSCALLS
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 72be01270e24..7e5109dab4e8 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -35,6 +35,18 @@ ENTRY(sys_clone_wrapper)
b .Lret_from_system_call
END(sys_clone_wrapper)
+ENTRY(sys_clone3_wrapper)
+ SAVE_CALLEE_SAVED_USER
+ bl @sys_clone3
+ DISCARD_CALLEE_SAVED_USER
+
+ GET_CURR_THR_INFO_FLAGS r10
+ btst r10, TIF_SYSCALL_TRACE
+ bnz tracesys_exit
+
+ b .Lret_from_system_call
+END(sys_clone3_wrapper)
+
ENTRY(ret_from_fork)
; when the forked child comes here from the __switch_to function
; r0 has the last task pointer.
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index e1889ce3faf9..bfd4cbe74aa3 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -171,9 +171,8 @@ asmlinkage void ret_from_fork(void);
* | user_r25 |
* ------------------ <===== END of PAGE
*/
-int copy_thread(unsigned long clone_flags,
- unsigned long usp, unsigned long kthread_arg,
- struct task_struct *p)
+int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
+ unsigned long kthread_arg, struct task_struct *p, unsigned long tls)
{
struct pt_regs *c_regs; /* child's pt_regs */
unsigned long *childksp; /* to unwind out of __switch_to() */
@@ -231,7 +230,7 @@ int copy_thread(unsigned long clone_flags,
* set task's userland tls data ptr from 4th arg
* clone C-lib call is difft from clone sys-call
*/
- task_thread_info(p)->thr_ptr = regs->r3;
+ task_thread_info(p)->thr_ptr = tls;
} else {
/* Normal fork case: set parent's TLS ptr in child */
task_thread_info(p)->thr_ptr =
diff --git a/arch/arc/kernel/sys.c b/arch/arc/kernel/sys.c
index fddecc76efb7..1069446bdc58 100644
--- a/arch/arc/kernel/sys.c
+++ b/arch/arc/kernel/sys.c
@@ -7,6 +7,7 @@
#include <asm/syscalls.h>
#define sys_clone sys_clone_wrapper
+#define sys_clone3 sys_clone3_wrapper
#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call),
--
2.20.1
next reply other threads:[~2020-01-16 0:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 0:09 Vineet Gupta [this message]
2020-01-16 11:19 ` [PATCH] ARC: wireup clone3 syscall Christian Brauner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200116000948.17646-1-vgupta@synopsys.com \
--to=vineet.gupta1@synopsys.com \
--cc=arnd@arndb.de \
--cc=christian@brauner.io \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-snps-arc@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).