Method modify_ldt

source/kernel/kthread.cpp:1293–1327

}

U32 KThread::modify_ldt(U32 func, U32 ptr, U32 count) {
    if (func == 1 || func == 0x11) {
        int index = memory->readd(ptr);
        U32 address = memory->readd(ptr + 4);
        U32 limit = memory->readd(ptr + 8);
        U32 flags = memory->readd(ptr + 12);

        if (index>=0 && index<LDT_ENTRIES) {
            struct user_desc* ldt = this->getLDT(index);            
            
            ldt->entry_number = index;
            ldt->limit = limit;
            ldt->base_addr = address;
            ldt->flags = flags;
        } else {
            kpanic_fmt("syscall_modify_ldt invalid index: %d", index);
        }
        return 0;
    } else if (func == 0) {
        int index = memory->readd(ptr);
        if (index>=0 && index<LDT_ENTRIES) {
            struct user_desc* ldt = this->getLDT(index);

            memory->writed(ptr + 4, ldt->base_addr);
            memory->writed(ptr + 8, ldt->limit);
            memory->writed(ptr + 12, ldt->flags);
        } else {
            kpanic_fmt("syscall_modify_ldt invalid index: %d", index);
        }
        return 16;
    } else {
        kpanic_fmt("syscall_modify_ldt unknown func: %d", func);
        return -K_ENOSYS;
    }
}

U32 KThread::nanoSleep(U64 nano) {
    U32 millies = (U32)(nano / 1000000);