int main(void)
{
init_global();
init_gdt();
init_idt();
init_tss();
init_virtual_memory_mapping();
init_process();
init_8259a();
init_clock();
init_keyboard();
init_syscall();
debug_helper();
restart();
}
int main (int argc, char ** argv)
{
uint64_t * p0;
const char * source_fname;
size_t embed_minimum_size;
if (argc < 2) {
fputs ("Usage: winloader.exe <program.prg> [args...]\n", stderr);
return 1;
}
source_fname = argv[1];
embed_minimum_size = init_load (source_fname);
p0 = VirtualAlloc (NULL, embed_minimum_size + MAX_HEAP_SIZE,
MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
assert (p0 != NULL);
printf ("p0 = %p\n", p0);
init_syscall
((((uint64_t) p0) + embed_minimum_size),
(((uint64_t) p0) + embed_minimum_size + MAX_HEAP_SIZE));
do_load (p0, syscall_shim, source_fname);
printf ("launch = %p\n\n\n\n", p0);
go_shim (p0, argc - 1, &argv[1]);
/* failure...! */
return 1;
}
NTSTATUS DriverEntry(
IN PDRIVER_OBJECT drv_obj,
IN PUNICODE_STRING reg_pth
)
{
// PIMAGE_DOS_HEADER d_head;
// PIMAGE_NT_HEADERS n_head;
NTSTATUS status = STATUS_UNSUCCESSFUL;
HANDLE h_key = NULL;
// u32 tstamp;
do
{
if ( (h_key = reg_open_key(reg_pth->Buffer, NULL)) == NULL ) {
DbgMsg("can not open service key\n");
break;
}
/* get ntoskrnl base */
if ( (ntkrn_base = get_kernel_base()) == NULL ) {
DbgMsg("kernel base not found\n");
break;
}
DbgMsg("kernel base: %x\n", ntkrn_base);
/* get ntoskrnl timestamp */
/* turned off because of the futility: dbghelp do this stuf
if (reg_query_val(h_key, L"sym_timestamp", &tstamp, sizeof(tstamp)) == 0) {
DbgMsg("unable to get ntoskrnl timestamp\n");
break;
}
*/
/* validate ntoskrnl timestamp */
/*
d_head = ntkrn_base;
n_head = addof(d_head, d_head->e_lfanew);
if (n_head->FileHeader.TimeDateStamp != tstamp) {
DbgMsg("invalid ntoskrnl timestamp\n");
break;
}
*/
if (init_hook_list() == 0){
DbgMsg("init_hook_list failed\n");
break;
}
if (init_dbg_item(h_key) == 0) {
DbgMsg("init_dbg_item failed\n");
break;
}
if (init_debug(h_key) == 0) {
DbgMsg("init_debug failed\n");
break;
}
if (init_syscall(h_key) == 0) {
DbgMsg("init_syscall failed\n");
break;
}
DbgMsg("dbgapi initialized\n");
status = STATUS_SUCCESS;
} while (0);
if (h_key != NULL) {
ZwClose(h_key);
}
return status;
}
int kmain(unsigned int magic,multibootInfo *mb)
{
construct(); //construct the global objects
char ans;
cout<<"Nano OS is booting\n";
String::strcpy(boot_dev,(const char *)mb->bootDevice);
memend=mb->memoryUpper*1024+0x100000; //memory end upper memory in bytes +1MB
// well now show the world we have managed our Memory ;)
multiboot *m_boot;
m_boot=multiboot::Instance();
m_boot->set_multiboot_info(mb);
m_boot->set_multiboot_hdr();
cout<<"===============================\n";
cout<<"Available Memory : "<<(unsigned int)m_boot->get_mem_avail()/1024<<"\n";
cout<<" Used Memory : "<<(unsigned int)m_boot->get_mem_used()/1024<<"\n";
cout<<"===============================\n";
cout.flags(hex|showbase);
cout<<"Kernel start "<<(unsigned int)m_boot->get_k_start()<<" Kernel end "<<(unsigned int)m_boot->get_k_end() \
<<" kernel length ="<<(unsigned int)m_boot->get_k_length()<<"\n";
cout.flags(dec);
kend = m_boot->get_k_end();
// Before we do any thing we should initialize our Heap based memory allocator( Thanks to Chris Giese )
init_heap();
// Setup our Descriptor tables GDT and IDT
cout<<"Setting up GDT ";
GDT::setup();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
cout<<"setting up IDT ";
IDT::setup();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
// After our IDT is loaded We should install our interrupt
cout<<"setting up IRQ subsystem ";
IRQ::setup();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
// Now, as our IRQ subsystem is set we should install keyboard sothat, our system will be interractive.
cout<<"installing key board \n";
kbd::setup();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
// The operating system and the digital computers are worthless if there is no timer
// so install and initialize the timer
cout<<"installing timer interrupt ";
TIMER *my_timer = TIMER::Instance();
my_timer->setup();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
cout<<"my_timer at "<<(unsigned int)my_timer<<"\n";
cout<<"Mboot at "<<(unsigned int)m_boot<<"\n";
// So all the basic systems are in place now
// We should initialize the PCI subsystem
cout<<"Scanning PCI...\n";
pci_bus *sys_pci_bus=pci_bus::Instance();
sys_pci_bus->scan();
sys_pci_bus->list_dev();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
// now we can start our interrupt system
cout<<"\n\n"<<"Enabling Interrupts ";
enable();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
// now check if we have any PCI IDE
cout<<"Initilizing storage susbsystem(PCI-IDE) ";
init_disks();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
cout<<"Initializing Net device...";
detect_netdev();
cout.SetColour(RED,BLACK,0);
cout<<"done\n";
cout.SetColour(WHITE,BLACK,0);
//cout<<"\nDone\n";
//here let us try our Network ethernet device setup
//sys_nic0->send_arp_request();
//cout<<"net init complete\n";
//cout<<"sending\n";
//for(int i=0;i<10;i++)
// test_req_arp();
// show which IRQs are installed not necessary but it comes handy while debugging the ISRs.
//cout<<"\n"<<"Dumping IRQ routines \n";
//IRQ::dump_irq_routines();
// Our tasks are thread implemented in kernel and it depends on timer interrupt
// so now we can start the tasking subsystem
//cout<<"Initializing tasking ";
//init_tasks();
// bellow this we should not see anything.. why? because in the tasks we started 2 threads
// one idle thread and other is our Shell
//cout<<"done\n";
init_syscall();
my_test();
for(;;);
cout<<"\nReached End of kernel\n shoud not happen \n\nGOODBYE\n";
disable();
halt();
return 0;
}
