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linux-user: Use safe_syscall wrapper for msgsnd and msgrcv
Use the safe_syscall wrapper for msgsnd and msgrcv syscalls. This is made slightly awkward by some host architectures providing only a single 'ipc' syscall rather than separate syscalls per operation; we provide safe_msgsnd() and safe_msgrcv() as wrappers around safe_ipc() to handle this if needed. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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