static void do_interrupt_user(CPUX86State *env, int intno, int is_int, int error_code, target_ulong next_eip) { SegmentCache *dt; target_ulong ptr; int dpl, cpl, shift; uint32_t e2; dt = &env->idt; if (env->hflags & HF_LMA_MASK) { shift = 4; } else { shift = 3; } ptr = dt->base + (intno << shift); e2 = cpu_ldl_kernel(env, ptr + 4); dpl = (e2 >> DESC_DPL_SHIFT) & 3; cpl = env->hflags & HF_CPL_MASK; /* check privilege if software int */ if (is_int && dpl < cpl) { raise_exception_err(env, EXCP0D_GPF, (intno << shift) + 2); } /* Since we emulate only user space, we cannot do more than exiting the emulation with the suitable exception and error code. So update EIP for INT 0x80 and EXCP_SYSCALL. */ if (is_int || intno == EXCP_SYSCALL) { env->eip = next_eip; } }