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On exception return for v8M, the SPSEL bit in the EXC_RETURN magic value should be restored to the SPSEL bit in the CONTROL register banked specified by the EXC_RETURN.ES bit. Add write_v7m_control_spsel_for_secstate() which behaves like write_v7m_control_spsel() but allows the caller to specify which CONTROL bank to use, reimplement write_v7m_control_spsel() in terms of it, and use it in exception return. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 1506092407-26985-6-git-send-email-peter.maydell@linaro.org |
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