Makefile

@@ -5,7 +5,7 @@ CC = ${HOME}/opt/cross/bin/i686-elf-gcc
 CPP = ${HOME}/opt/cross/bin/i686-elf-g++ 
 CFLAGS =  -ffreestanding -Og -ggdb  -Wall -Wextra
 
-OFILES =$(BUILD_DIR)/boot.o $(BUILD_DIR)/kterm.o $(BUILD_DIR)/kernel.o $(BUILD_DIR)/memory.o  $(BUILD_DIR)/paging.o	$(BUILD_DIR)/pit.o 	$(BUILD_DIR)/time.o	$(BUILD_DIR)/keyboard.o	 $(BUILD_DIR)/io.o 	$(BUILD_DIR)/gdtc.o $(BUILD_DIR)/idt.o $(BUILD_DIR)/pic.o $(BUILD_DIR)/sv-terminal.o $(BUILD_DIR)/string.o  $(BUILD_DIR)/launcher.o 
+OFILES =$(BUILD_DIR)/boot.o $(BUILD_DIR)/kterm.o $(BUILD_DIR)/kernel.o $(BUILD_DIR)/memory.o  $(BUILD_DIR)/paging.o	$(BUILD_DIR)/pit.o 	$(BUILD_DIR)/time.o	$(BUILD_DIR)/keyboard.o	 $(BUILD_DIR)/io.o 	$(BUILD_DIR)/gdtc.o $(BUILD_DIR)/idt.o $(BUILD_DIR)/pic.o $(BUILD_DIR)/sv-terminal.o $(BUILD_DIR)/string.o  $(BUILD_DIR)/prekernel.o
 
 SRC_DIR = source
 BUILD_DIR = build
@@ -30,7 +30,7 @@ clean_iso:
 iso: clean_iso clean build
 	mkdir -p root/boot/grub
 	cp build/myos.bin root/boot/myos.bin
-	cp src/grub.cfg root/boot/grub/grub.cfg
+	cp source/grub.cfg root/boot/grub/grub.cfg
 	grub-mkrescue -o build/barinkOS.iso root
 	
 run: all
@@ -58,13 +58,13 @@ $(BUILD_DIR)/kterm.o:
 	$(CPP) -c $(SRC_DIR)/kernel/Terminal/kterm.cpp  -o $(BUILD_DIR)/kterm.o $(CFLAGS) -fno-exceptions -fno-rtti
 
 $(BUILD_DIR)/boot.o:
-	$(AS) $(SRC_DIR)/kernel/KernelLauncher/boot.s -o $(BUILD_DIR)/boot.o
+	$(AS) $(SRC_DIR)/kernel/Boot/boot.s -o $(BUILD_DIR)/boot.o
 
 $(BUILD_DIR)/crti.o:
-	$(AS) $(SRC_DIR)/kernel/KernelLauncher/crti.s -o $(BUILD_DIR)/crti.o
+	$(AS) $(SRC_DIR)/kernel/crti.s -o $(BUILD_DIR)/crti.o
 
 $(BUILD_DIR)/crtn.o:
-	$(AS) $(SRC_DIR)/kernel/KernelLauncher/crtn.s -o $(BUILD_DIR)/crtn.o
+	$(AS) $(SRC_DIR)/kernel/crtn.s -o $(BUILD_DIR)/crtn.o
 
 $(BUILD_DIR)/io.o:
 		$(CPP) -c $(SRC_DIR)/kernel/io.cpp  -o $(BUILD_DIR)/io.o $(CFLAGS) -fno-exceptions -fno-rtti
@@ -104,5 +104,5 @@ $(BUILD_DIR)/memory.o:
 $(BUILD_DIR)/paging.o:
 	$(CPP) -c $(SRC_DIR)/kernel/Memory/VirtualMemoryManager.cpp -o $(BUILD_DIR)/paging.o $(CFLAGS) -fno-exceptions -fno-rtti
 
-$(BUILD_DIR)/launcher.o:
+$(BUILD_DIR)/prekernel.o:
-	$(CPP) -c $(SRC_DIR)/kernel/KernelLauncher/launcher.cpp -o $(BUILD_DIR)/launcher.o $(CFLAGS) -fno-exceptions -fno-rtti
+	$(CPP) -c $(SRC_DIR)/kernel/PreKernel/prekernel.cpp -o $(BUILD_DIR)/prekernel.o $(CFLAGS) -fno-exceptions -fno-rtti

source/grub.cfg

@@ -1,3 +1,9 @@
 menuentry "BarinkOS" {
     multiboot /boot/myos.bin
 }
+
+menuentry "BarinkOS Tests" {
+    multiboot /boot/myos.bin
+}
+
+

source/kernel/Boot/boot.s

@@ -43,6 +43,14 @@ multiboot_page_table:
 .global _start
 .type _start, @function 
 _start:
+
+	/* push the pointer to the Multiboot information structure*/
+	pushl %ebx
+
+	/* push the magic value */
+	pushl %eax
+	call testLauncher
+
 	# Get physical address of the boot_page_table
 	movl $(boot_page_table - 0xC0000000), %edi
 	# Map address 0
@@ -112,11 +120,7 @@ isPaging:
 	pushl $0 
 	popf 
 
-	/* push the pointer to the Multiboot information structure*/
-	pushl %ebx
 
-	/* push the magic value */
-	pushl %eax
 
 	call early_main
 
@@ -129,11 +133,11 @@ isPaging:
 	jmp 1b
 
 
-.include "./src/kernel/Memory/GDT/gdt.s"
+.include "./source/kernel/Memory/GDT/gdt.s"
-.include "./src/kernel/irs_table.s"
+.include "./source/kernel/irs_table.s"
-.include "./src/kernel/irq_table.s"
+.include "./source/kernel/irq_table.s"
-.include "./src/kernel/Interrupts/idt/idt.s"
+.include "./source/kernel/Interrupts/idt/idt.s"
-.include "./src/kernel/Memory/paging.s"
+.include "./source/kernel/Memory/paging.s"
-.include "./src/kernel/cpu.s"
+.include "./source/kernel/cpu.s"
 
 

source/kernel/KernelLauncher/bootcheck.h

@@ -1,91 +0,0 @@
-#pragma once 
-#include "../multiboot.h"
-#define CHECK_FLAG(flags, bit) ((flags) & (1 <<(bit)))
-#define __VERBOSE__
-#include "../Terminal/kterm.h"
-
-
-
-void CheckMBT ( multiboot_info_t*  mbt  ){
-      /* Set MBI to the addresss of the multiboot information structure*/
-        multiboot_info_t * mbi = (multiboot_info_t *) mbt;
-
-#ifdef __VERBOSE__
-        /* Print out the flags */
-        printf("flags = 0x%x\n", (unsigned) mbi->flags);
-#endif
-        /* Are mem_* valid? */
-        if ( CHECK_FLAG(mbi->flags,0)){
-                // Do nothing
-        }
-
-        /* is boot device valid ? */
-        if (CHECK_FLAG (mbi->flags, 1))
-        {
-#ifdef __VERBOSE__
-            printf("boot_device = 0x0%x\n", (unsigned) mbi->boot_device);
-#endif
-        }
-
-        /* is the command line passed? */
-        if (CHECK_FLAG ( mbi->flags,2))
-        {
-#ifdef  __VERBOSE__
-            printf("cmdline = %s\n", (char *) (mbi->cmdline + 0xC0000000));
-#endif
-        }
-
-        /* Are mods_* valid? */
-        if(CHECK_FLAG ( mbi->flags, 3)){
-            multiboot_module_t *mod;
-            uint32_t i;
-#ifdef __VERBOSE__
-            printf("mods count = %d, mods_addr = 0x%x\n", (int) mbi->mods_count, (int) mbi->mods_addr);
-
-            for(i = 0, mod = (multiboot_module_t *) mbi->mods_addr; i < mbi->mods_count; i++ , mod++){
-                printf(" mod start = 0x%x, mod_end = 0x%x, cmdline = %s\n", (unsigned) mod->mod_start, (unsigned) mod->mod_end, (char*) mod->cmdline);
-            }
-#endif
-        }
-
-        /* Bits 4 and 5 are mutually exclusive! */
-        if (CHECK_FLAG (mbi->flags, 4) && CHECK_FLAG(mbi->flags, 5))
-        {
-#ifdef __VERBOSE__
-            printf("Both bits 4 and 5 are set.\n");
-#endif 
-            return;
-        }
-
-        /* Is the symbol table of a.out valid? */
-        if (CHECK_FLAG(mbi->flags, 4)){
-            multiboot_aout_symbol_table_t *multiboot_aout_sym = &(mbi->u.aout_sym);
-#ifdef __VERBOSE__
-            printf( "multiboot_aout_symbol_table: tabsize = 0x%0x, strsize = 0x%x, addr = 0x%x\n", 
-            (unsigned) multiboot_aout_sym->tabsize,
-            (unsigned) multiboot_aout_sym->strsize,
-            (unsigned) multiboot_aout_sym->addr);
-#endif
-        }
-
-        /* Is the section header table of ELF valid? */
-        if (CHECK_FLAG(mbi->flags, 5)){
-            multiboot_elf_section_header_table_t *multiboot_elf_sec = &(mbi->u.elf_sec);
-#ifdef __VERBOSE__
-            printf("multiboot_elf_sec: num = %u, size = 0x%x, addr = 0x%x, shnd = 0x%x\n",
-            
-            (unsigned) multiboot_elf_sec->num, (unsigned) multiboot_elf_sec->size,
-            (unsigned) multiboot_elf_sec->addr, (unsigned)  multiboot_elf_sec->shndx);
-#endif
-            
-        }
-
-        /* Draw diagonal blue line */
-        if (CHECK_FLAG (mbt->flags, 12)){
-#ifdef __VERBOSE__
-            printf("Can draw!\n");
-#endif
-        } 
-
-
-}

source/kernel/KernelLauncher/launcher.cpp

@@ -1,28 +0,0 @@
-#include <stdint.h>
-#include <stddef.h>
-
-void put_char(char ch, size_t x, size_t y ){
-    *((uint16_t*)0xb8000+(y * 80 + x)) = ch | ((7 | 0 << 4) << 8);
-}
-
-void write_ln(char* s, size_t length, size_t x , size_t y)
-{
-  // Because read only data is linked at a virtual address we'll need to convert
-  // the string adddres from virtual to phys.
-  s = s - 0xC0000000;
-  size_t column , row;
-  column = x;
-  row = y;
-  for(int i = 0; i < length ; i ++)
-  {
-    
-    put_char(s[i] , column,row );
-    column ++;
-
-  }
-  
-}
-
-extern "C" void testLauncher  () {
-  write_ln("hello", 5 ,0,0);
-}

source/kernel/Memory/MBIMMap/MBI_MMap.cpp

@@ -1,6 +1,6 @@
 #include "MBI_MMap.h"
 
-
+/*
 void mapMultibootMemoryMap( MemoryInfo* memInfo , multiboot_info_t *mbt) {
 
     printf("mmap_addr = 0x%x, mmap_length = 0x%x\n", (unsigned) mbt->mmap_addr , (unsigned) mbt->mmap_length );
@@ -23,13 +23,13 @@ void mapMultibootMemoryMap( MemoryInfo* memInfo , multiboot_info_t *mbt) {
 }
 
 
-
+*/
 /**
  * @brief Debug Verbose functions
  * 
  * @param mmap 
  */
-
+/*
 void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap) {
     printf(
         "size = 0x%x, base_addr = 0x%x%08x, length = 0x%x%08x, type = 0x%x\n",
@@ -41,3 +41,4 @@ void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap) {
         (unsigned) mmap->type
     );
 }
+*/

source/kernel/Memory/MBIMMap/MBI_MMap.h

@@ -1,16 +1,18 @@
 #pragma once 
 #include <stddef.h>
-#include "../../multiboot.h"
+//#include "../../multiboot.h"
 #include "../memoryinfo.h"
 
 void initialise_available_regions(uint32_t memoryMapAddr, uint32_t memoryMapLastAddr, uint32_t* memoryBitMap, int* used_blocks);
 
-
+/*
 void mapMultibootMemoryMap( MemoryInfo* memInfo , multiboot_info_t *mbt);
-
+*/
 /**
  * @brief Debug Verbose Functions
  * 
  * @param mmap 
  */
+/*
 void print_Multiboot_memory_Map(multiboot_memory_map_t* mmap);
+*/

source/kernel/PreKernel/bootstructure.h

@@ -0,0 +1,28 @@
+#pragma once 
+#include <stddef.h>
+#include <stdint.h>
+
+
+extern "C" const uint32_t kernel_begin;
+extern "C" const uint32_t kernel_end;
+struct BootInfoBlock {
+    bool MapIsInvalid;
+    uint32_t bootDeviceID ;
+
+    uint32_t GrubModuleCount;
+
+    bool ValidSymbolTable;
+    uint32_t SymbolTableAddr;
+    uint32_t SymbolTabSize;
+    uint32_t SymbolStrSize;
+
+    bool ValidELFHeader;
+
+    bool EnabledVBE;
+
+    bool PhysicalMemoryMapAvailable;
+
+};
+
+// Put the BootInfoBlock 1MB above the kernel.
+const uint32_t BootInfoBlock_pptr = kernel_end - 0xC0000000 + 0x1000;

source/kernel/PreKernel/prekernel.cpp

@@ -0,0 +1,93 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "multiboot.h"
+#include "bootstructure.h"
+#define CHECK_FLAG(flags, bit) ((flags) & (1 <<(bit)))
+
+
+extern "C" void testLauncher  ( unsigned long magic, multiboot_info_t* mbi) {
+  
+  // Create the bootInfoBlock at its location
+  BootInfoBlock* BIB = (BootInfoBlock*) BootInfoBlock_pptr;
+
+  /*
+   * Check Multiboot magic number
+   */ 
+  if (magic != MULTIBOOT_BOOTLOADER_MAGIC)
+  {
+        BIB->MapIsInvalid = true;
+        return;
+  } else{
+        BIB->MapIsInvalid = false;
+  }
+
+  /* is boot device valid ? */
+  if (CHECK_FLAG (mbi->flags, 1))
+  {
+        BIB->bootDeviceID = mbi->boot_device;
+  }
+
+  /* Are mods_* valid? */
+  if(CHECK_FLAG ( mbi->flags, 3)){
+      multiboot_module_t *mod;
+      uint32_t i;
+
+      BIB->GrubModuleCount = mbi->mods_count;
+
+
+      for(i = 0, mod = (multiboot_module_t *) mbi->mods_addr; i < mbi->mods_count; i++ , mod++){
+       
+      }
+  }
+
+  /* Is the symbol table of a.out valid? */
+  if (CHECK_FLAG(mbi->flags, 4))
+  {
+          BIB->ValidSymbolTable = true;
+          multiboot_aout_symbol_table_t *multiboot_aout_sym = &(mbi->u.aout_sym);
+
+  } else{
+          BIB->ValidSymbolTable = false;
+  }
+
+  /* Is the section header table of ELF valid? */
+  if (CHECK_FLAG(mbi->flags, 5))
+  {
+          BIB->ValidELFHeader = true;
+          multiboot_elf_section_header_table_t *multiboot_elf_sec = &(mbi->u.elf_sec);
+
+  }else{
+          BIB->ValidELFHeader = false;
+  }
+/*
+        If we got a memory map from our bootloader we 
+        should be parsing it to find out the memory regions available.
+    */
+    if (CHECK_FLAG(mbi->flags, 6))
+    {  
+        BIB->PhysicalMemoryMapAvailable = true;
+        multiboot_memory_map_t *mmap = (multiboot_memory_map_t*) (mbi->mmap_addr) ;
+
+        for (;  (unsigned long) mmap < mbi->mmap_addr + mbi->mmap_length;  mmap = (multiboot_memory_map_t *) ((unsigned long) mmap + mmap->size + sizeof(mmap->size))){
+
+            if ( mmap->type == MULTIBOOT_MEMORY_AVAILABLE){
+                  
+            } else{
+               
+               
+            }
+          
+            
+        } 
+        
+    } else{
+        BIB->PhysicalMemoryMapAvailable = false;
+    }
+    
+  /* Draw diagonal blue line */
+  if (CHECK_FLAG (mbi->flags, 12)){
+          BIB->EnabledVBE = true;
+  } else{
+          BIB->EnabledVBE;
+  }
+}

source/kernel/Terminal/kterm.cpp

@@ -22,6 +22,7 @@ void kterm_init () {
     kterm_column = 0;
     kterm_color = vga_entry_color ( VGA_COLOR_LIGHT_GREY , VGA_COLOR_BLACK);
     kterm_buffer = (uint16_t*) 0xC03FF000;
+    
     for (size_t y = 0; y < VGA_HEIGHT; y++ ){
         for( size_t x = 0; x < VGA_WIDTH; x++){
             const size_t index = y * VGA_WIDTH + x;
@@ -31,7 +32,6 @@ void kterm_init () {
     }
 }
 
-
 void kterm_resetcolor(){
      kterm_color = vga_entry_color ( VGA_COLOR_LIGHT_GREY , VGA_COLOR_BLACK);
 }
@@ -42,9 +42,7 @@ void kterm_setcolor(uint8_t color){
 
 void kterm_putat (char c, uint8_t color, size_t x, size_t y ) {
     const size_t index = y * VGA_WIDTH + x;
-
     kterm_buffer[index] = vga_entry(c, color);
-
 }
 
 void enable_cursor (uint8_t start_cursor , uint8_t end_cursor ){

source/kernel/kernel.cpp

@@ -1,15 +1,13 @@
 #include "kernel.h"
-
+extern "C" void early_main()
-extern "C" void early_main(unsigned long magic, unsigned long addr){
+{
-
+    /*
-    // Convert MBI address to higher quarter kernel space
-    addr += KERNEL_BASE_ADDR;
-    /** 
      * Initialize terminal interface 
-     * NOTE: This should be done later on , the magic value should be checked first.
      */ 
     initGDT();
+
     kterm_init();
+
     init_serial();
     print_serial("Hello Higher half kernel!\n");
  
@@ -17,110 +15,38 @@ extern "C" void early_main(unsigned long magic, unsigned long addr){
     // Enable interrupts
     asm volatile("STI");
 
-   
+    /*
-    printf("DEBUG:\n Magic: 0x%x\n MBT_addr: 0x%x\n", magic, addr);
-    /**
-     * Check Multiboot magic number
-     * NOTE: Printf call should not be a thing this early on ...
-    */ 
-    if (magic != MULTIBOOT_BOOTLOADER_MAGIC){
-        printf("Invalid magic number: 0x%x\n",  magic);
-        return;
-    }
-
-    /**
      * Show a little banner for cuteness
      */
     printf("|===    BarinkOS       ===|\n");
-    /**
-     * Use the address given as an argument as the pointer
-     * to a Multiboot information structure.
-     */
-        multiboot_info_t* mbt = (multiboot_info_t*) (addr );
 
-    /**
+    BootInfoBlock* BootInfo = (BootInfoBlock*) ( BootInfoBlock_pptr + 0xC0000000 );
-     * Construct our own bootInfo structure
-     */
-        BootInfo bootinfo = {};
-       
-        
-    /*
-        If we got a memory map from our bootloader we 
-        should be parsing it to find out the memory regions available.
-    */
-    if (CHECK_FLAG(mbt->flags, 6))
-    {  
-    
-        /*
-            Setup Physical memory managment
-        */
-        MemoryInfo meminfo = {};
-        bootinfo.memory = &meminfo;
- 
-        ///mapMultibootMemoryMap(bootinfo.memory , mbt);        
-        printf("Memory size: 0x%x bytes\n", bootinfo.memory->TotalMemory );
 
-       /*
+    printf("Bootloader information:\n");
-        PhysicalMemory memAlloc = PhysicalMemory{};
+    if( BootInfo->ValidELFHeader )
-        memAlloc.setup(bootinfo.memory );
+    {
-        */
+        printf("- Valid ELF Header is available!\n");
+    }
 
-        // TODO: FIX physical allocator
+    if(BootInfo->EnabledVBE)
-        /*
+    {
-         Mark already in use sections 
+        printf("- VBE graphics mode is available!\n");
-        */
+    }
-        
-        // Mark kernel memory as used
-        printf("Kernel Begin Pointer: 0x%x, Kernel end pointer: 0x%x\n", &kernel_begin , &kernel_end );
-       
-       
-        multiboot_memory_map_t *mmap = (multiboot_memory_map_t*) (mbt->mmap_addr + KERNEL_BASE_ADDR) ;
 
-        for (;  (unsigned long) mmap < mbt->mmap_addr + mbt->mmap_length;  mmap = (multiboot_memory_map_t *) ((unsigned long) mmap + mmap->size + sizeof(mmap->size))){
+    if(BootInfo->ValidSymbolTable)
+    {
+        printf("- Valid Symbol Table available at 0x%x.\n Tab Size: %d, str Size: %d\n", BootInfo->SymbolTableAddr, BootInfo->SymbolTabSize, BootInfo->SymbolStrSize);
+    }
 
-            if ( mmap->type == MULTIBOOT_MEMORY_AVAILABLE){
+    if(BootInfo->PhysicalMemoryMapAvailable)
-                  
+    {
-            } else{
+        printf("- Physical Memory Map available!\n");
-                printf("allocate region: 0x%x, size : 0x%x bytes\n", (unsigned) mmap->addr,(unsigned) mmap->len  );
-               // memAlloc.allocate_region((unsigned)mmap->addr , (unsigned)mmap->len);
-            }
-          
-            
-        } 
-
-
-       printf("allocate region: 0x%x, size : 0x%x bytes\n", &kernel_begin, &kernel_end - &kernel_begin );
-       //memAlloc.allocate_region(kernel_end, kernel_end - kernel_begin);
-    
-        // test alloc_block
-        /*
-        uint8_t* memory = (uint8_t*) memAlloc.allocate_block();
-        printf("Got a new pointer: 0x%x\n", memory);
-
-        uint8_t* memory2 = (uint8_t*) memAlloc.allocate_block();
-        printf("Got a new pointer: 0x%x\n", memory2);
-
-
-        memAlloc.free_block((void*) memory);
-
-        uint8_t* newBlockPlse = (uint8_t*) memAlloc.allocate_block();
-        */
-
-
-
-        //memAlloc.free_block((void*) memory);
-        //InitializePaging();
-        //IdentityMap();
-        //Enable();
-    } else{
-        printf("memory flag not set!");
     }
     
-    CheckMBT( (multiboot_info_t *) addr);
 	asm volatile("mov %cr0, %eax ");
     asm volatile("or $1, %eax");
     asm volatile("mov %eax, %cr0");
-    kernel_main(&bootinfo);
+    kernel_main();
     
 }
 
@@ -151,9 +77,28 @@ void map_multiboot_info_structure(unsigned long addr){
     asm("movl %cr3, %ecx;" "movl %ecx, %cr3" );
 }
 
-    
+void PhysicalMemoryAllocatorTest(){
-extern "C" void kernel_main (BootInfo* bootinfo) {
+#ifdef UNIT_TESTS
+       // test alloc_block
+        uint8_t* memory = (uint8_t*) memAlloc.allocate_block();
+        printf("Got a new pointer: 0x%x\n", memory);
+
+        uint8_t* memory2 = (uint8_t*) memAlloc.allocate_block();
+        printf("Got a new pointer: 0x%x\n", memory2);
+
+        memAlloc.free_block((void*) memory);
+        uint8_t* newBlockPlse = (uint8_t*) memAlloc.allocate_block();
+#endif
+}
+
+
+extern "C" void kernel_main () {
     pit_initialise();
 
+    // Create a dummy BootInfo object
+    // TODO: This should be done properly or the dependency should
+    //          be removed from the SuperVisorTerminal.
+    BootInfo* bootinfo = {};
+
     startSuperVisorTerminal(bootinfo);
 }   

source/kernel/kernel.h

@@ -3,19 +3,16 @@ extern "C"
 {
    #include "Lib/string.h" 
 }
-
 #include "definitions.h"
 
 #include "Drivers/VGA/VBE.h"
 #include "Terminal/kterm.h"
 
-#include "multiboot.h"
 #include "bootinfo.h"
 
 #include "Memory/PhysicalMemoryManager.h"
 #include "Memory/memoryinfo.h"
 #include "Memory/VirtualMemoryManager.h"
-#include "KernelLauncher/bootcheck.h"
 
 #include "Memory/GDT/gdtc.h"
 #include "Interrupts/idt/idt.h"
@@ -27,17 +24,15 @@ extern "C"
 
 #include "time.h"
 #include "SuperVisorTerminal/superVisorTerminal.h"
+#include "PreKernel/bootstructure.h"
 
 #define CHECK_FLAG(flag, bit) ( flag & (1 << bit ))
 #define PANIC(message) {return;} 
 
-
 void map_multiboot_info_structure(unsigned long addr);
 
-extern "C" void kernel_main (BootInfo* bootinfo);
+extern "C" void kernel_main ();
 
-extern "C" const void* kernel_begin;
-extern "C" const void* kernel_end;
 
 extern "C" uint32_t boot_page_directory;
 extern "C" uint32_t multiboot_page_table;

source/kernel/linker.ld

@@ -16,7 +16,7 @@ SECTIONS
 
 	.multiboot.text : {
 		*(multiboot.text)
-		*launcher.o(.text)
+		*prekernel.o(.text)
 	}
 
 	. += 0xC0000000; /* Addresses in the following code need to be above the 3Gb mark */