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#include "types.h"
#include "VGA.h"
#include "kmalloc.h"
#include "i386.h"
#include "i8253.h"
#include "Keyboard.h"
#include "Task.h"
#include "system.h"
#include "Disk.h"
#include "PIC.h"
#include "StdLib.h"
#include "Syscall.h"
#include "CMOS.h"
#include "IDEDiskDevice.h"
#include <VirtualFileSystem/NullDevice.h>
#include <VirtualFileSystem/ZeroDevice.h>
#include <VirtualFileSystem/FullDevice.h>
#include <VirtualFileSystem/RandomDevice.h>
#include <VirtualFileSystem/Ext2FileSystem.h>
#include <VirtualFileSystem/VirtualFileSystem.h>
#include <VirtualFileSystem/FileHandle.h>
#include <AK/OwnPtr.h>
#include "MemoryManager.h"
#include <ELFLoader/ELFLoader.h>
#include "Console.h"
#include "ProcFileSystem.h"
#include "RTC.h"
#define TEST_VFS
#define KSYMS
//#define STRESS_TEST_SPAWNING
//#define TEST_ELF_LOADER
system_t system;
void banner()
{
kprintf("\n\033[33;1mWelcome to \033[36;1mSerenity OS!\033[0m\n\n");
}
static byte parseHexDigit(char nibble)
{
if (nibble >= '0' && nibble <= '9')
return nibble - '0';
ASSERT(nibble >= 'a' && nibble <= 'f');
return 10 + (nibble - 'a');
}
static Vector<KSym>* s_ksyms;
Vector<KSym>& ksyms()
{
return *s_ksyms;
}
const KSym* ksymbolicate(dword address)
{
if (address < ksyms().first().address || address > ksyms().last().address)
return nullptr;
for (unsigned i = 0; i < ksyms().size(); ++i) {
if (address < ksyms()[i + 1].address)
return &ksyms()[i];
}
return nullptr;
}
static void loadKsyms(const ByteBuffer& buffer)
{
s_ksyms = new Vector<KSym>;
auto* bufptr = (const char*)buffer.pointer();
auto* startOfName = bufptr;
dword address = 0;
while (bufptr < buffer.endPointer()) {
for (unsigned i = 0; i < 8; ++i)
address = (address << 4) | parseHexDigit(*(bufptr++));
bufptr += 3;
startOfName = bufptr;
while (*(++bufptr)) {
if (*bufptr == '\n') {
break;
}
}
ksyms().append({ address, String(startOfName, bufptr - startOfName) });
++bufptr;
}
}
static void undertaker_main() NORETURN;
static void undertaker_main()
{
for (;;) {
Task::doHouseKeeping();
sleep(300);
}
}
static void init_stage2() NORETURN;
static void init_stage2()
{
kprintf("init stage2...\n");
Syscall::initialize();
auto keyboard = make<Keyboard>();
Disk::initialize();
#ifdef TEST_VFS
auto vfs = make<VirtualFileSystem>();
auto dev_zero = make<ZeroDevice>();
vfs->registerCharacterDevice(1, 5, *dev_zero);
auto dev_null = make<NullDevice>();
vfs->registerCharacterDevice(1, 3, *dev_null);
auto dev_full = make<FullDevice>();
vfs->registerCharacterDevice(1, 7, *dev_full);
auto dev_random = make<RandomDevice>();
vfs->registerCharacterDevice(1, 8, *dev_random);
vfs->registerCharacterDevice(85, 1, *keyboard);
auto dev_hd0 = IDEDiskDevice::create();
auto e2fs = Ext2FileSystem::create(dev_hd0.copyRef());
e2fs->initialize();
vfs->mountRoot(e2fs.copyRef());
#ifdef KSYMS
{
int error;
auto handle = vfs->open("/kernel.map", error);
if (!handle) {
kprintf("Failed to open /kernel.map\n");
} else {
auto buffer = handle->readEntireFile();
ASSERT(buffer);
loadKsyms(buffer);
}
}
#endif
vfs->mount(ProcFileSystem::the(), "/proc");
#endif
#ifdef TEST_ELF_LOADER
{
auto testExecutable = vfs->open("/bin/id");
ASSERT(testExecutable);
auto testExecutableData = testExecutable->readEntireFile();
ASSERT(testExecutableData);
ExecSpace space;
space.loadELF(move(testExecutableData));
auto* elf_entry = space.symbolPtr("_start");
ASSERT(elf_entry);
typedef int (*MainFunctionPtr)(void);
kprintf("elf_entry: %p\n", elf_entry);
int rc = reinterpret_cast<MainFunctionPtr>(elf_entry)();
kprintf("it returned %d\n", rc);
}
#endif
#ifdef STRESS_TEST_SPAWNING
dword lastAlloc = sum_alloc;
for (unsigned i = 0; i < 100; ++i) {
int error;
auto* shTask = Task::createUserTask("/bin/id", (uid_t)100, (gid_t)100, (pid_t)0, error);
kprintf("malloc stats: alloc:%u free:%u\n", sum_alloc, sum_free);
kprintf("sizeof(Task):%u\n", sizeof(Task));
kprintf("delta:%u\n",sum_alloc - lastAlloc);
lastAlloc = sum_alloc;
sleep(600);
}
#endif
int error;
auto* shTask = Task::createUserTask("/bin/sh", (uid_t)100, (gid_t)100, (pid_t)0, error);
banner();
#if 0
// It would be nice to exit this process, but right now it instantiates all kinds of things.
// At the very least it needs to be made sure those things stick around as appropriate.
DO_SYSCALL_A1(Syscall::PosixExit, 413);
kprintf("uh, we're still going after calling sys$exit...\n");
HANG;
#endif
for (;;) {
//sleep(3600 * TICKS_PER_SECOND);
asm("hlt");
}
}
void init()
{
cli();
kmalloc_init();
vga_init();
auto console = make<Console>();
RTC::initialize();
PIC::initialize();
gdt_init();
idt_init();
MemoryManager::initialize();
VirtualFileSystem::initializeGlobals();
StringImpl::initializeGlobals();
PIT::initialize();
memset(&system, 0, sizeof(system));
WORD base_memory = (CMOS::read(0x16) << 8) | CMOS::read(0x15);
WORD ext_memory = (CMOS::read(0x18) << 8) | CMOS::read(0x17);
kprintf("%u kB base memory\n", base_memory);
kprintf("%u kB extended memory\n", ext_memory);
auto procfs = ProcFileSystem::create();
procfs->initialize();
Task::initialize();
Task::createKernelTask(undertaker_main, "undertaker");
Task::createKernelTask(init_stage2, "init");
scheduleNewTask();
sti();
// This now becomes the idle task :^)
for (;;) {
asm("hlt");
}
}
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