Method onExec

source/kernel/kprocess.cpp:99–171

}

void KProcess::onExec(KThread* thread) {
    BHashTable<U32, KFileDescriptorPtr> fdsToClose = this->fds; // make a copy since we can't remove from it while iterating
    for( const auto& n : fdsToClose ) {
        KFileDescriptorPtr fd = n.value;
        if (fd->descriptorFlags) {
            clearFdHandle(fd->handle);
        }
    }
    this->attachedShm.clear();
    this->privateShm.clear();
    this->mappedFiles.clear();

    for (int i = 0; i < MAX_SIG_ACTIONS; i++) {
        this->sigActions[i].reset();
    }

    if (this->timer.active) {
        removeTimer(&this->timer);
    }

    std::vector<KThread*> toDelete;
    for (auto& n : this->threads) {
        if (thread != n.value) {
            toDelete.push_back(n.value);
        }
    }
    for (auto& otherThread : toDelete) {
        terminateOtherThread(shared_from_this(), otherThread->id);
    }
    this->threads.clear();
    this->threads.set(thread->id, thread);

    this->initStdio();
    
    for (int i=0;i<LDT_ENTRIES;i++) {
        this->ldt[i].seg_not_present = 1;
        this->ldt[i].read_exec_only = 1;
    }
    memset(this->usedTLS, 0, sizeof(this->usedTLS));

    this->ldt[1].base_addr = 0;
    this->ldt[1].entry_number = 1;
    this->ldt[1].seg_32bit = 1;
    this->ldt[1].seg_not_present = 0;
    this->ldt[1].read_exec_only = 0;

    this->ldt[2].base_addr = 0;
    this->ldt[2].entry_number = 2;
    this->ldt[2].seg_32bit = 1;
    this->ldt[2].seg_not_present = 0;
    this->ldt[2].read_exec_only = 0;

    for (int i=0;i<6;i++) {
        this->hasSetSeg[i] = false;
    }
    this->hasSetSeg[GS] = true;
    this->hasSetSeg[FS] = true;
    this->hasSetStackMask = false;