linux-user: Support for restarting system calls for PPC targets
Update the PPC main loop code: * on TARGET_ERESTARTSYS, wind guest PC backwards to repeat syscall insn (We already handle TARGET_QEMU_ESIGRETURN.) Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk> Message-id: 1441497448-32489-8-git-send-email-T.E.Baldwin99@members.leeds.ac.uk Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: tweak commit message; drop TARGET_USE_ERESTARTSYS define] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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@ -1987,6 +1987,10 @@ void cpu_loop(CPUPPCState *env)
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ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
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ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
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env->gpr[5], env->gpr[6], env->gpr[7],
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env->gpr[5], env->gpr[6], env->gpr[7],
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env->gpr[8], 0, 0);
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env->gpr[8], 0, 0);
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if (ret == -TARGET_ERESTARTSYS) {
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env->nip -= 4;
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break;
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}
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if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) {
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if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) {
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/* Returning from a successful sigreturn syscall.
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/* Returning from a successful sigreturn syscall.
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Avoid corrupting register state. */
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Avoid corrupting register state. */
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@ -26,4 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUPPCState *state)
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return state->gpr[1];
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return state->gpr[1];
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}
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}
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#endif /* TARGET_SIGNAL_H */
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#endif /* TARGET_SIGNAL_H */
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