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linux-user/nios2: Handle special qemu syscall return values

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Honor QEMU_ESIGRETURN and QEMU_ERESTARTSYS.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-6-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-04-21 08:16:36 -07:00
parent b3a219b70e
commit b9ef5b3138
1 changed files with 8 additions and 0 deletions
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8
linux-user/nios2/cpu_loop.c
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@ -55,6 +55,14 @@ void cpu_loop(CPUNios2State *env)
env->regs[7], env->regs[8], env->regs[9],
0, 0);
if (ret == -QEMU_ESIGRETURN) {
/* rt_sigreturn has set all state. */
break;
}
if (ret == -QEMU_ERESTARTSYS) {
env->regs[R_PC] -= 4;
break;
}
/*
* See the code after translate_rc_and_ret: all negative
* values are errors (aided by userspace restricted to 2G),