Commit 5849dfe4 authored by Richard Henderson's avatar Richard Henderson Committed by Laurent Vivier
Browse files

linux-user/alpha: Set r20 secondary return value 



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: default avatarRichard Henderson <richard.henderson@linaro.org>
Reviewed-by: default avatarLaurent Vivier <laurent@vivier.eu>
Message-Id: <20191106113318.10226-13-richard.henderson@linaro.org>
Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
parent 2ad983e0

linux-user/alpha/target_cpu.h

+9 −0
Original line number Diff line number Diff line
@@ -27,10 +27,19 @@ static inline void cpu_clone_regs_child(CPUAlphaState *env, target_ulong newsp, 
    }

    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)