diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/process.c | 8 | ||||
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 4 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index af1ea258c212..659ae8094ed5 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -298,12 +298,16 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, return 0; } +void tls_preserve_current_state(void) +{ + *task_user_tls(current) = read_sysreg(tpidr_el0); +} + static void tls_thread_switch(struct task_struct *next) { unsigned long tpidr, tpidrro; - tpidr = read_sysreg(tpidr_el0); - *task_user_tls(current) = tpidr; + tls_preserve_current_state(); tpidr = *task_user_tls(next); tpidrro = is_compat_thread(task_thread_info(next)) ? diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index eeef01a219a6..35846f1550db 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -652,6 +652,10 @@ static int tls_get(struct task_struct *target, const struct user_regset *regset, void *kbuf, void __user *ubuf) { unsigned long *tls = &target->thread.tp_value; + + if (target == current) + tls_preserve_current_state(); + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, tls, 0, -1); } |