This value is not, as far as I know, used by any linux software,
but it is set by the kernel and is part of the ABI.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <
20191106113318.10226-13-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
}
env->ir[IR_V0] = 0;
env->ir[IR_A3] = 0;
+ env->ir[IR_A4] = 1; /* OSF/1 secondary return: child */
}
static inline void cpu_clone_regs_parent(CPUAlphaState *env, unsigned flags)
{
+ /*
+ * OSF/1 secondary return: parent
+ * Note that the kernel does not do this if SETTLS, because the
+ * settls argument register is still live after copy_thread.
+ */
+ if (!(flags & CLONE_SETTLS)) {
+ env->ir[IR_A4] = 0;
+ }
}
static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls)