diff options
| author | Amanieu d'Antras <amanieu@gmail.com> | 2020-01-02 18:24:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-14 20:08:35 +0100 |
| commit | 3981d85a91824e529de5ee5128ec0b5bb63d1a42 (patch) | |
| tree | 8100adebcc0848b686c7720974733e15da3d7601 /arch/xtensa | |
| parent | 0b6a32ef88530dc2f55adf4a5e8a16453c33b0ff (diff) | |
xtensa: Implement copy_thread_tls
commit c346b94f8c5d1b7d637522c908209de93305a8eb upstream.
This is required for clone3 which passes the TLS value through a
struct rather than a register.
Signed-off-by: Amanieu d'Antras <amanieu@gmail.com>
Cc: linux-xtensa@linux-xtensa.org
Cc: <stable@vger.kernel.org> # 5.3.x
Link: https://lore.kernel.org/r/20200102172413.654385-7-amanieu@gmail.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/Kconfig | 1 | ||||
| -rw-r--r-- | arch/xtensa/kernel/process.c | 8 |
2 files changed, 5 insertions, 4 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index a8e7beb6b7b5..8352037322df 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -22,6 +22,7 @@ config XTENSA select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KASAN if MMU select HAVE_ARCH_TRACEHOOK + select HAVE_COPY_THREAD_TLS select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS select HAVE_EXIT_THREAD diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index db278a9e80c7..7cbf8bd6d922 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -202,8 +202,9 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) * involved. Much simpler to just not copy those live frames across. */ -int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn, - unsigned long thread_fn_arg, struct task_struct *p) +int copy_thread_tls(unsigned long clone_flags, unsigned long usp_thread_fn, + unsigned long thread_fn_arg, struct task_struct *p, + unsigned long tls) { struct pt_regs *childregs = task_pt_regs(p); @@ -264,9 +265,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn, ®s->areg[XCHAL_NUM_AREGS - len/4], len); } - /* The thread pointer is passed in the '4th argument' (= a5) */ if (clone_flags & CLONE_SETTLS) - childregs->threadptr = childregs->areg[5]; + childregs->threadptr = tls; } else { p->thread.ra = MAKE_RA_FOR_CALL( (unsigned long)ret_from_kernel_thread, 1); |