linux-user: Support for restarting system calls for MIPS targets
Update the MIPS 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: 1441497448-32489-7-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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@ -2528,6 +2528,10 @@ done_syscall:
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env->active_tc.gpr[8], env->active_tc.gpr[9],
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env->active_tc.gpr[10], env->active_tc.gpr[11]);
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# endif /* O32 */
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if (ret == -TARGET_ERESTARTSYS) {
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env->active_tc.PC -= 4;
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break;
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}
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if (ret == -TARGET_QEMU_ESIGRETURN) {
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/* Returning from a successful sigreturn syscall.
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Avoid clobbering register state. */
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@ -26,4 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUMIPSState *state)
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return state->active_tc.gpr[29];
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}
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#endif /* TARGET_SIGNAL_H */
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@ -26,4 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUMIPSState *state)
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return state->active_tc.gpr[29];
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}
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#endif /* TARGET_SIGNAL_H */
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