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target/arm: Correct condition for v8M callee stack push
In v7m_exception_taken() we were incorrectly using a "LR bit EXCRET.ES is 1" check when it should be 0 (compare the pseudocode ExceptionTaken() function). This meant we didn't stack the callee-saved registers when tailchaining from a NonSecure to a Secure exception. Cc: qemu-stable@nongnu.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181002145940.30931-1-peter.maydell@linaro.org
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