linux-kernel - [PATCH v2 2/2] arch: wire-up clone3() syscall on x86

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Message-Id: <20190603144331.16760-2-christian@brauner.io>
Date:   Mon,  3 Jun 2019 16:43:31 +0200
From:   Christian Brauner <christian@...uner.io>
To:     viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org, jannh@...gle.com
Cc:     keescook@...omium.org, fweimer@...hat.com, oleg@...hat.com,
        arnd@...db.de, dhowells@...hat.com,
        Christian Brauner <christian@...uner.io>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Adrian Reber <adrian@...as.de>, linux-api@...r.kernel.org,
        linux-arch@...r.kernel.org, x86@...nel.org
Subject: [PATCH v2 2/2] arch: wire-up clone3() syscall on x86

Wire up the clone3() call on x86.

This patch only wires up clone3() on x86. Some of the arches look like they
need special assembly massaging and it is probably smarter if the
appropriate arch maintainers would do the actual wiring.

Signed-off-by: Christian Brauner <christian@...uner.io>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Kees Cook <keescook@...omium.org>
Cc: David Howells <dhowells@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Adrian Reber <adrian@...as.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Florian Weimer <fweimer@...hat.com>
Cc: linux-api@...r.kernel.org
Cc: linux-arch@...r.kernel.org
Cc: x86@...nel.org
---
v1: unchanged
v2: unchanged
---
 arch/x86/entry/syscalls/syscall_32.tbl | 1 +
 arch/x86/entry/syscalls/syscall_64.tbl | 1 +
 include/uapi/asm-generic/unistd.h      | 4 +++-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index ad968b7bac72..80e26211feff 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -438,3 +438,4 @@
 431	i386	fsconfig		sys_fsconfig			__ia32_sys_fsconfig
 432	i386	fsmount			sys_fsmount			__ia32_sys_fsmount
 433	i386	fspick			sys_fspick			__ia32_sys_fspick
+436	i386	clone3			sys_clone3			__ia32_sys_clone3
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index b4e6f9e6204a..7968f0b5b5e8 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -355,6 +355,7 @@
 431	common	fsconfig		__x64_sys_fsconfig
 432	common	fsmount			__x64_sys_fsmount
 433	common	fspick			__x64_sys_fspick
+436	common	clone3			__x64_sys_clone3/ptregs
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index a87904daf103..45bc87687c47 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -844,9 +844,11 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig)
 __SYSCALL(__NR_fsmount, sys_fsmount)
 #define __NR_fspick 433
 __SYSCALL(__NR_fspick, sys_fspick)
+#define __NR_clone3 436
+__SYSCALL(__NR_clone3, sys_clone3)
 
 #undef __NR_syscalls
-#define __NR_syscalls 434
+#define __NR_syscalls 437
 
 /*
  * 32 bit systems traditionally used different
-- 
2.21.0