DBG_SPSR_SS
regs->pstate |= DBG_SPSR_SS;
regs->pstate &= ~DBG_SPSR_SS;
if (*vcpu_cpsr(vcpu) & DBG_SPSR_SS)
*vcpu_cpsr(vcpu) |= DBG_SPSR_SS;
*vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS;
if (!(*vcpu_cpsr(vcpu) & DBG_SPSR_SS))
*vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS;
*vcpu_cpsr(vcpu) |= DBG_SPSR_SS;
*vcpu_cpsr(vcpu) |= DBG_SPSR_SS;
*vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS;
*vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS;
*vcpu_cpsr(vcpu) & DBG_SPSR_SS &&