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kernel: wipe TLS before dropping to user mode

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Ensures that TLS from when the thread was in supervisor mode
is erased, rather than rely on the arch code to do it.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2020-05-08 14:52:12 -07:00 • committed by Carles Cufí
commit 743ff98f51
1 changed files with 2 additions and 0 deletions
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kernel/thread.c
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@ -751,6 +751,8 @@ FUNC_NORETURN void k_thread_user_mode_enter(k_thread_entry_t entry,
_current->entry.parameter3 = p3;
#endif
#ifdef CONFIG_USERSPACE
memset(_current->userspace_local_data, 0,
sizeof(struct _thread_userspace_local_data));
arch_user_mode_enter(entry, p1, p2, p3);
#else
/* XXX In this case we do not reset the stack */