b0df5186e6
1) The PML2 was not initialized to zeroes, thus leaving some bits behind that caused the fork code to go crazy, forking the unforkable, and mapping addresses that never, ever, should have been mapped, leaving behind a trail of page faults and general protection faults on some computers, while other computers worked because the uninitalized memory just wasn't uninitialized enough. Yep, this was a schrödinbug! 2) Fixed a time bomb. The kernel heap was accidentally put such that whenever a few megabytes were allocated, it would begin overwriting the physical page stack causing unthinkable events to unfold and would probably be even more obscure to debug than 1). Oh, and some string errors fixed and removed RunApplication from kernel.cpp, funny thing that even linked in the first place. Guess, the optimizer actually did work for once. :)
269 lines
9.4 KiB
C++
269 lines
9.4 KiB
C++
/******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with Sortix. If not, see <http://www.gnu.org/licenses/>.
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kernel.cpp
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A common interface shared by all devices that can be printed text to.
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******************************************************************************/
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#include "platform.h"
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#include <libmaxsi/memory.h>
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#include <libmaxsi/string.h>
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#include <libmaxsi/format.h>
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#include "log.h"
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#include "panic.h"
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#include "descriptor_tables.h"
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#include "time.h"
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#include "keyboard.h"
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#include "multiboot.h"
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#include "memorymanagement.h"
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#include "scheduler.h"
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#include "syscall.h"
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#include "pci.h"
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#include "uart.h"
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#include "serialterminal.h"
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#include "vgaterminal.h"
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#include "elf.h"
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#include "initrd.h"
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using namespace Maxsi;
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void* RunApplication(void* Parameter);
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extern "C" size_t stack[4096] = {0};
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extern "C" size_t stackend = 0;
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namespace Sortix
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{
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#ifdef PLATFORM_HTTP
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namespace HTTP { void Init(); }
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#endif
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void DoBSoD()
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{
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#ifdef PLATFORM_SERIAL
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UART::WriteChar(27);
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UART::WriteChar(91);
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UART::WriteChar(48 + 4);
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UART::WriteChar(48 + 4);
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UART::WriteChar(109);
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#endif
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Log::Print(" ");
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Log::Print(" ");
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Log::Print("Windows Boot Manager has experienced a problem. ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" Status: 0xc000000f ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" Info: An error occured during transferring execution. ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print("You can try to recover the system with the Microsoft Windows System Recovery ");
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Log::Print("Tools. (You might need to restart the system manually). ");
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Log::Print(" ");
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Log::Print("If the problem continues, please contact your system administrator or computer ");
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Log::Print("manufacturer. ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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#ifdef JSSORTIX
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JSSortix::Exit();
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#else
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while ( true ) { }
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#endif
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}
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void DoMaxsiLogo()
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{
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Log::Print(" _ \n");
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Log::Print(" / \\ \n");
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Log::Print(" /\\ /\\ / \\ \n");
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Log::Print(" / \\ / \\ | | \n");
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Log::Print(" / \\/ \\ | | \n");
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Log::Print(" | O O \\_______________________ / | \n");
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Log::Print(" | | \n");
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Log::Print(" | \\_______/ / \n");
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Log::Print(" \\ / \n");
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Log::Print(" ------ --------------- ---/ \n");
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Log::Print(" / \\ / \\ \n");
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Log::Print(" / \\ / \\ \n");
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Log::Print(" / \\ / \\ \n");
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Log::Print(" /_____________\\ /____________\\ \n");
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Log::Print(" \n");
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Log::Print(" BOOTING OPERATING SYSTEM... ");
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}
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void DoWelcome()
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{
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#ifdef BSOD
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DoBSoD();
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#endif
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DoMaxsiLogo();
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}
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extern "C" void KernelInit(unsigned long Magic, multiboot_info_t* BootInfo)
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{
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#ifdef JSSORTIX
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// TODO: Make JSVM multiboot compliant.
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multiboot_info_t MBInfo; BootInfo = &MBInfo;
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multiboot_memory_map_t MBMMap;
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MBMMap.addr = 0x100000;
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MBMMap.len = 0xC00000;
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MBMMap.type = MULTIBOOT_MEMORY_AVAILABLE;
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MBMMap.size = sizeof(MBMMap) - sizeof(MBMMap.size);
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BootInfo->flags = MULTIBOOT_INFO_MEM_MAP;
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BootInfo->mmap_addr = (multiboot_uint32_t) &MBMMap;
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BootInfo->mmap_length = sizeof(MBMMap);
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#endif
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// Initialize the default terminal.
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Maxsi::Format::Callback logcallback;
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void* logpointer;
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#if PLATFORM_SERIAL
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// Initialize the serial driver.
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UART::Init();
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SerialTerminal::Init();
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logcallback = SerialTerminal::Print;
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logpointer = NULL;
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#else
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VGATerminal::Init();
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logcallback = VGATerminal::Print;
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logpointer = NULL;
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#endif
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// Initialize the kernel log.
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Log::Init(logcallback, logpointer);
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// Just a test to see if the color system works! Make the BG red!
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Log::Print("\e[37;41m\e[2J");
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// Display the boot welcome screen.
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DoWelcome();
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#ifndef JSSORTIX
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// Search for PCI devices and load their drivers.
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PCI::Init();
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#endif
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// Initialize the paging and virtual memory.
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Memory::Init(BootInfo);
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uint8_t* initrd = NULL;
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size_t initrdsize = 0;
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#ifndef JSSORTIX
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uint8_t** modules = (uint8_t**) BootInfo->mods_addr;
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for ( uint32_t I = 0; I < BootInfo->mods_count; I++ )
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{
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initrdsize = modules[2*I+1] - modules[2*I+0];
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initrd = modules[2*I+0];
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break;
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}
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#else
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// TODO: UGLY HACK because JSVM doesn't support multiboot yet!
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initrd = (uint8_t*) 0x180000UL;
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initrdsize = 0x80000; // 512 KiB
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#endif
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if ( initrd == NULL ) { PanicF("No initrd provided"); }
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// Initialize the GDT and TSS structures.
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GDT::Init();
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#ifdef PLATFORM_X64
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Log::Print("Halt: CPU X64 cannot boot because interrupts are not yet "
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"supported under 64-bit Sortix.\n");
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Log::Print("Sorry, it simply isn't possible to fully boot Sortix in x64 mode yet.\n");
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Log::Print("X64 may be working when Sortix 0.5 comes out, or try the git master.\n");
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while(true);
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#endif
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// Initialize the interrupt descriptor tables.
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IDT::Init();
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if ( BootInfo == NULL ) { Panic("kernel.cpp: The bootinfo structure was NULL. Are your bootloader multiboot compliant?"); }
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// Initialize the kernel heap.
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Maxsi::Memory::Init();
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// Initialize the keyboard.
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Keyboard::Init();
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// Initialize system calls.
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Syscall::Init();
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// Initialize the scheduler.
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Scheduler::Init();
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Thread::Entry initstart = NULL;
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// Create an address space for the first process.
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addr_t addrspace = Memory::Fork();
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// Use the new address space!
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Memory::SwitchAddressSpace(addrspace);
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// Create the first process!
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Process* process = new Process(addrspace);
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if ( process == 0 ) { Panic("kernel.cpp: Could not allocate the first process!"); }
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InitRD::Init(initrd, initrdsize);
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const char* initname = "init";
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size_t programsize = 0;
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byte* program = InitRD::Open(initname, &programsize);
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if ( program == NULL ) { PanicF("initrd did not contain '%s'", initname); }
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initstart = (Thread::Entry) ELF::Construct(process, program, programsize);
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if ( initstart == NULL )
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{
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Panic("kernel.cpp: Could not construct ELF program");
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}
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// HACK: This should be determined from other information!
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process->_endcodesection = 0x400000UL;
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if ( Scheduler::CreateThread(process, initstart) == NULL )
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{
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Panic("Could not create a sample thread!");
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}
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// Lastly set up the timer driver and we are ready to run the OS.
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Time::Init();
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// Run the OS.
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Scheduler::MainLoop();
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}
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}
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