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For the A64 instruction set, the semihosting call instruction is 'HLT 0xf000'. Wire this up to call do_arm_semihosting() if semihosting is enabled. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Christopher Covington <christopher.covington@linaro.org> Tested-by: Christopher Covington <cov@codeaurora.org> Message-id: 1439483745-28752-10-git-send-email-peter.maydell@linaro.org