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clean-up
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cd0913ed13
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19
Makefile
19
Makefile
@ -90,15 +90,19 @@ make_disk:
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testloader: loader
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@qemu-system-x86_64 -hda build/bin/disk.img -d cpu_reset,guest_errors,pcall,int -enable-kvm 2> qemu.log &
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@ndisasm $(OBJDIR)/boot/loader -b 32 > loader_dism.asm
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@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > loader_disasm64.asm
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@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > loader_disasm32.asm
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testloader32: loader
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testloader: loader
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@qemu-system-i386 -hda build/bin/disk.img -d cpu_reset,guest_errors,pcall,int -enable-kvm 2> qemu.log &
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@ndisasm $(OBJDIR)/boot/loader -b 32 > loader_dism.asm
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@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > loader_disasm64.asm
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@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > loader_disasm32.asm
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debugloader: loader
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testloader: loader
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@qemu-system-x86_64 -hda build/bin/disk.img -d cpu_reset,guest_errors,pcall,int -s -S -enable-kvm 2> qemu.log &
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@ndisasm $(OBJDIR)/boot/loader -b 32 > loader_dism.asm
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@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > loader_disasm64.asm
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@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > loader_disasm32.asm
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boot: make_disk boot.mbr loader
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@echo ${CL2}[[boot]]${CL} Terminated without error.${CL3}
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@ -111,6 +115,5 @@ link:
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@x86_64-elf-objcopy -I elf64-x86-64 -O elf32-i386 $(OBJDIR)/boot/kaleid.x86_64 $(BINDIR)/kaleid
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clean:
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rm -Rf $(BINDIR)/*
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rm -Rf $(OBJDIR)/*/*/*/*.o
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@rm -Rf $(BINDIR)/*
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@rm -Rf $(OBJDIR)/*/*/*/*.o
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@ -23,17 +23,19 @@
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#=----------------------------------------------------------------------------=#
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This folder contains the source for OS/K's bootloader.
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This folder contains the source for OS/K's early loader.
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OS/K being intended to only run on x86-64 systems, we have not divided
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this folder into one sub-folder per architecture.
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The bootloader itself is external to the OS/K project. We are using GRUB 2 to load
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our kernel loader in memory.
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The bootloader itself is external to the OS/K project. We are using GRUB 2 to
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load our kernel loader in memory.
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The kernel loader, that we call the loader, is the main subject of this folder.
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This loader is intended to load the ELF64 kernel at the specified address and
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prepare it for the hard work it have to do :
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This loader is linked whith the kernel and loaded by Grub at the specified
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address and prepare it for the hard work it have to do :
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- Parsing the ELF64
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- Load the kernel
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- Prepare a structure for it with memory map, cpu infos, and other devices infos.
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- Check the multiboot state
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- Check if CPUID and long mode is supported
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- Send a structure for it with memory map, cpu infos, and other devices
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infos, prepared by GRUB.
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- Switch into long mode
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@ -52,10 +52,10 @@ MB_start:
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popf
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push eax ; 2nd argument is magic number
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push ebx ; 1st argument multiboot info pointer
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mov ecx, eax
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mov ecx, eax ; For debug
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call _loader
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add esp, 8 ; Cleanup arguments "A la MIPS"
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jmp Die ; Aufwiedersehen
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jmp Die ; Aufwiedersehen, but never used
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;; THE HOLES ---------------------------------------------------------------- ;;
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; ---------------------------------------------------------------------------- ;
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@ -98,16 +98,20 @@ _loader:
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LOGO: db 219, 219, 219, " OS/K", 0
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lbegin:
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call MB_check
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call clear ; Clear the screen
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call Check_cpuid
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call Is64Bits
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call CheckA20
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;; BEGIN OF CHECKLIST
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call MB_check ; Check Multiboot State
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call Setup_paging
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call Go64
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call Check_cpuid ; Check if cpuid supported
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call Is64Bits ; Check if long mode available
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call CheckA20 ; Check if A20 is correctly enable
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push esi
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;; BEGIN OF WORK
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call Setup_paging ; Enable paging
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call Go64 ; Prepare switch into long mode
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push esi ; Print the logo
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mov bl, 0x0E
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mov esi, LOGO
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call write32
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@ -116,12 +120,11 @@ lbegin:
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call disable_cursor
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lgdt [GDT64.pointer]
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jmp GDT64.code:_loader64
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jmp GDT64.code:_loader64 ; SWITCH
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[BITS 64]
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Salut db "Now in x64 long mode", 0x0A, 0x0D, 0x0
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x64_K db "Now in x64 long mode", 0x0A, 0x0D, 0x0
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GoKernel db "Launching Kernel...", 0
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_loader64:
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@ -135,23 +138,21 @@ _loader64:
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call bitemporize
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mov qword [NextTRAM], TRAM+80*4
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mov qword [NextTRAM], TRAM+80*4 ; Because we don't want to overwrite
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;; Hello world
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mov bl, 0x0A
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mov esi, Salut
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mov esi, x64_K
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call write
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;; Read ATA
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mov bl, 0x0F
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mov esi, GoKernel
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call write
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;mov ecx, 4000
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call tritemporize
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;; Launch the kernel !
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call tritemporize ; Let time to see
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extern StartKern
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jmp StartKern
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;; We must never reach this point ------------------------------------------- ;;
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jmp Die
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@ -28,7 +28,7 @@
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//
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// Entry point of the Kaleid kernel
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//
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noreturn void StartKern(void)
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noreturn void StartKern(void* multibooot_info, int multiboot_magic)
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{
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// We're not ready to deal with interrupts
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DisableIRQs();
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