Adrien Bourmault
commit
236a065bd5
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@ -15,6 +15,11 @@ test-*.c
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*.yml
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CNAME
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# Other stuff
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multiboot.pdf
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grub.log
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Makefile.out.2
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build/bin/s**
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# Linker output
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*.ilk
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43
Makefile
43
Makefile
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@ -40,24 +40,51 @@ tests:
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make tests -f build/Makefile.out.2
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rm build/Makefile.out build/Makefile.out.2
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#Programs
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ASM=nasm
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ASMFLAGS=
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BOOTFLAGS=-f bin
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MBRDIR=boot/mbr
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#Folders
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MBRDIR=boot/grub
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LOADERDIR=boot/loader
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OBJDIR=build/obj
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BINDIR=build/bin
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boot.mbr.asm: $(MBRDIR)/mbr.asm $(MBRDIR)/mbr.inc
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$(ASM) $(BOOTFLAGS) $(MBRDIR)/mbr.asm -o $(OBJDIR)/boot/mbr.bin
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#Color codes
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CL='\033[0;32m'
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CL2='\033[1;31m'
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CL3='\033[0m'
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NC='\033[1;37m'
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boot.mbr: $(BINDIR)/disk.img $(MBRDIR)/grub.cfg
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@mkdir -p $(BINDIR)/disk
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@echo ${CL2}[boot.mbr]${NC} Installing bootloader on image...${CL3}
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@$(MBRDIR)/grub-install.sh $(BINDIR)/disk.img $(BINDIR)/disk $(MBRDIR)/grub.cfg
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@echo ${CL2}[boot.mbr]${CL} OK${CL3}
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@rmdir $(BINDIR)/disk
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boot.loader.asm: $(LOADERDIR)/loader.asm
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$(ASM) $(BOOTFLAGS) $(LOADERDIR)/loader.asm -o $(OBJDIR)/boot/loader.bin
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@echo ${CL2}[boot.loader.asm]${NC} Making loader.bin...${CL3}
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@$(ASM) $(BOOTFLAGS) $(LOADERDIR)/loader.asm -o $(OBJDIR)/boot/loader.bin > /dev/null
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@echo ${CL2}[boot.loader.asm]${CL} OK${CL3}
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bootloader: boot.mbr.asm boot.loader.asm
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cp $(OBJDIR)/boot/mbr.bin $(BINDIR)/mbr.bin
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cp $(OBJDIR)/boot/loader.bin $(BINDIR)/loader.bin
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bootloader: boot.mbr boot.loader.asm
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@mkdir -p $(BINDIR)/disk
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@echo ${CL2}[bootloader]${NC} Constructing bootloader...${CL3}
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@$(MBRDIR)/mount.sh $(BINDIR)/disk.img $(BINDIR)/disk
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@cp $(OBJDIR)/boot/loader.bin $(BINDIR)/disk/boot/loader.bin
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@$(MBRDIR)/umount.sh $(BINDIR)/disk
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@echo ${CL2}[bootloader]${CL} OK${CL3}
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@rmdir $(BINDIR)/disk
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all: bootloader kernel
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make_disk:
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@echo ${CL2}[make_disk]${NC} Constructing disk image...${CL3}
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@$(MBRDIR)/create_disk.sh $(BINDIR)/disk.img
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@echo ${CL2}[make_disk]${CL} OK${CL3}
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boot: make_disk bootloader
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@echo ${CL2}[[boot]]${CL} Terminated without error.${CL3}
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all: boot kernel
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@echo ${CL2}[[all]]${CL} Terminated without error.${CL3}
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@ -5,7 +5,9 @@
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### Fully free operating system from scratch (WIP)
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#### Master Branch
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#### Loader Branch
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Development focused on the kernel loader.
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For the project plan, see [OS/K Project](https://github.com/orgs/os-k-team/projects/1)
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@ -27,12 +27,13 @@ This folder contains the source for OS/K's bootloader.
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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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It is divided in two parts each of exactly 512 bytes:
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- mbr.s (and its auxiliary file mbr.inc)
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This is our Master Boot Record (MBR). It switches to long mode
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(64 bits mode) then loads the second half of the bootloader.
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The MBR must be placed precisely on the first sector of the hard drive.
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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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- loader.s
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This is the Kernel Loader. It switches to long mode and makes stuff.
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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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- 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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@ -0,0 +1,66 @@
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#=----------------------------------------------------------------------------=#
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# GNU GPL OS/K #
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# #
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# Desc: OS/K image maker script #
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# #
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# #
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# Copyright © 2018-2019 The OS/K Team #
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# #
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# This file is part of OS/K. #
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# #
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# OS/K is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# any later version. #
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# #
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# OS/K is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY# without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with OS/K. If not, see <https://www.gnu.org/licenses/>. #
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#=----------------------------------------------------------------------------=#
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#Color codes
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CL='\033[0;32m'
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CL2='\033[1;36m'
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CL3='\033[0m'
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NC='\033[1;37m'
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set -e #exit if error
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## Create the image
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echo ${CL2}[create_disk.sh]${NC} Creating image... \(dd\)${CL3}
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dd if=/dev/zero of=$1 bs=512 count=131072 > /dev/null
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echo ${CL2}[create_disk.sh]${NC} Partitionning image... \(fdisk\)${CL3}
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## Partition the image
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# WARNING, DO NOT DELETE SPACES !
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sudo fdisk $1 > /dev/null <<EEOF
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n
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p
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1
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a
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w
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EEOF
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# WARNING, YOU CAN NOW DELETE SPACES
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echo ${CL2}[create_disk.sh]${NC} Mouting image... \(losetup\)${CL3}
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## Map
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sudo losetup -D > /dev/null
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sudo losetup /dev/loop0 $1 -o 1048576 > /dev/null #mounting the logical partition
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echo ${CL2}[create_disk.sh]${NC} Formatting image... \(mkdosfs\)${CL3}
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## Format
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sudo mkdosfs -F32 -f 2 /dev/loop0 > /dev/null
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echo ${CL2}[create_disk.sh]${NC} Sync image... \(sync\)${CL3}
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sync
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echo ${CL2}[create_disk.sh]${NC} Unmounting... \(losetup\)${CL3}
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sudo losetup -D > /dev/null
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echo ${CL2}[create_disk.sh]${CL} Terminated without error.${CL3}
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@ -0,0 +1,60 @@
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#=----------------------------------------------------------------------------=#
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# GNU GPL OS/K #
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# #
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# Desc: Grub installation script for the OS/K image #
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# #
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# #
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# Copyright © 2018-2019 The OS/K Team #
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# #
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# This file is part of OS/K. #
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# #
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# OS/K is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# any later version. #
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# #
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# OS/K is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY# without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with OS/K. If not, see <https://www.gnu.org/licenses/>. #
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#=----------------------------------------------------------------------------=#
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#Color codes
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CL='\033[0;32m'
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CL2='\033[1;36m'
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CL3='\033[0m'
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NC='\033[1;37m'
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set -e #exit if error
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echo ${CL2}[grub-install.sh]${NC} Mouting image... \(losetup\)${CL3}
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## Prepare Mount
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sudo losetup -D > /dev/null
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sudo losetup /dev/loop0 $1 > /dev/null # mounting the device block
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sudo losetup /dev/loop1 $1 -o 1048576 > /dev/null #mounting the logical partition
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echo ${CL2}[grub-install.sh]${NC} Mounting volume... \(mount\)${CL3}
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## Mount
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sudo mount /dev/loop1 $2 > /dev/null
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echo ${CL2}[grub-install.sh]${NC} Installing grub... \(grub-install\)${CL3}
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## Install grub
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sudo grub-install -V
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sudo grub-install --target=i386-pc --debug --root-directory=$2 --boot-directory=$2/boot --no-floppy --modules="part_msdos biosdisk fat multiboot configfile" /dev/loop0 2> grub.log
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echo ${CL2}[grub-install.sh]${NC} Copying grub.cfg
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sudo cp $3 $2/boot/grub/grub.cfg > /dev/null
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echo ${CL2}[grub-install.sh]${NC} Sync image... \(sync\)${CL3}
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sync
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echo ${CL2}[grub-install.sh]${NC} Unmounting volume... \(umount\)${CL3}
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sudo umount /dev/loop1 > /dev/null
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echo ${CL2}[grub-install.sh]${NC} Unmounting image... \(losetup\)${CL3}
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sudo losetup -D > /dev/null
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echo ${CL2}[grub-install.sh]${CL} Terminated without error. See grub.log for more informations.${CL3}
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@ -0,0 +1,32 @@
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#=----------------------------------------------------------------------------=#
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# GNU GPL OS/K #
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# #
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# Desc: Grub 2 configuration file for OS/K boot #
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# #
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# #
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# Copyright © 2018-2019 The OS/K Team #
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# #
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# This file is part of OS/K. #
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# #
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# OS/K is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# any later version. #
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# #
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# OS/K is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY# without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with OS/K. If not, see <https://www.gnu.org/licenses/>. #
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#=----------------------------------------------------------------------------=#
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set timeout=5
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set default=0 #Set the default menu entry
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menuentry "OS/K (pre-pre-alpha 0.0.1)" {
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multiboot /boot/loader.bin # The multiboot command replaces the kernel command
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boot
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}
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@ -0,0 +1,417 @@
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/* multiboot2.h - Multiboot 2 header file. */
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/* Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
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* DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef MULTIBOOT_HEADER
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#define MULTIBOOT_HEADER 1
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/* How many bytes from the start of the file we search for the header. */
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#define MULTIBOOT_SEARCH 32768
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#define MULTIBOOT_HEADER_ALIGN 8
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/* The magic field should contain this. */
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#define MULTIBOOT2_HEADER_MAGIC 0xe85250d6
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/* This should be in %eax. */
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#define MULTIBOOT2_BOOTLOADER_MAGIC 0x36d76289
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/* Alignment of multiboot modules. */
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#define MULTIBOOT_MOD_ALIGN 0x00001000
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/* Alignment of the multiboot info structure. */
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#define MULTIBOOT_INFO_ALIGN 0x00000008
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/* Flags set in the 'flags' member of the multiboot header. */
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#define MULTIBOOT_TAG_ALIGN 8
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#define MULTIBOOT_TAG_TYPE_END 0
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#define MULTIBOOT_TAG_TYPE_CMDLINE 1
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#define MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME 2
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#define MULTIBOOT_TAG_TYPE_MODULE 3
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#define MULTIBOOT_TAG_TYPE_BASIC_MEMINFO 4
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#define MULTIBOOT_TAG_TYPE_BOOTDEV 5
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#define MULTIBOOT_TAG_TYPE_MMAP 6
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#define MULTIBOOT_TAG_TYPE_VBE 7
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#define MULTIBOOT_TAG_TYPE_FRAMEBUFFER 8
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#define MULTIBOOT_TAG_TYPE_ELF_SECTIONS 9
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#define MULTIBOOT_TAG_TYPE_APM 10
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#define MULTIBOOT_TAG_TYPE_EFI32 11
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#define MULTIBOOT_TAG_TYPE_EFI64 12
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#define MULTIBOOT_TAG_TYPE_SMBIOS 13
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#define MULTIBOOT_TAG_TYPE_ACPI_OLD 14
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#define MULTIBOOT_TAG_TYPE_ACPI_NEW 15
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#define MULTIBOOT_TAG_TYPE_NETWORK 16
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#define MULTIBOOT_TAG_TYPE_EFI_MMAP 17
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#define MULTIBOOT_TAG_TYPE_EFI_BS 18
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#define MULTIBOOT_TAG_TYPE_EFI32_IH 19
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#define MULTIBOOT_TAG_TYPE_EFI64_IH 20
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#define MULTIBOOT_TAG_TYPE_LOAD_BASE_ADDR 21
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#define MULTIBOOT_HEADER_TAG_END 0
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#define MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST 1
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#define MULTIBOOT_HEADER_TAG_ADDRESS 2
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#define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS 3
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#define MULTIBOOT_HEADER_TAG_CONSOLE_FLAGS 4
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#define MULTIBOOT_HEADER_TAG_FRAMEBUFFER 5
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#define MULTIBOOT_HEADER_TAG_MODULE_ALIGN 6
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#define MULTIBOOT_HEADER_TAG_EFI_BS 7
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#define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI32 8
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#define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI64 9
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#define MULTIBOOT_HEADER_TAG_RELOCATABLE 10
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#define MULTIBOOT_ARCHITECTURE_I386 0
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#define MULTIBOOT_ARCHITECTURE_MIPS32 4
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#define MULTIBOOT_HEADER_TAG_OPTIONAL 1
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#define MULTIBOOT_LOAD_PREFERENCE_NONE 0
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#define MULTIBOOT_LOAD_PREFERENCE_LOW 1
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#define MULTIBOOT_LOAD_PREFERENCE_HIGH 2
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#define MULTIBOOT_CONSOLE_FLAGS_CONSOLE_REQUIRED 1
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#define MULTIBOOT_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED 2
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#ifndef ASM_FILE
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typedef unsigned char multiboot_uint8_t;
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typedef unsigned short multiboot_uint16_t;
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typedef unsigned int multiboot_uint32_t;
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typedef unsigned long long multiboot_uint64_t;
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struct multiboot_header
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{
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/* Must be MULTIBOOT_MAGIC - see above. */
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multiboot_uint32_t magic;
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/* ISA */
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multiboot_uint32_t architecture;
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/* Total header length. */
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multiboot_uint32_t header_length;
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||||
/* The above fields plus this one must equal 0 mod 2^32. */
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multiboot_uint32_t checksum;
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};
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struct multiboot_header_tag
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{
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multiboot_uint16_t type;
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multiboot_uint16_t flags;
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||||
multiboot_uint32_t size;
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||||
};
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||||
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||||
struct multiboot_header_tag_information_request
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||||
{
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||||
multiboot_uint16_t type;
|
||||
multiboot_uint16_t flags;
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||||
multiboot_uint32_t size;
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||||
multiboot_uint32_t requests[0];
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||||
};
|
||||
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||||
struct multiboot_header_tag_address
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||||
{
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||||
multiboot_uint16_t type;
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||||
multiboot_uint16_t flags;
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||||
multiboot_uint32_t size;
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||||
multiboot_uint32_t header_addr;
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||||
multiboot_uint32_t load_addr;
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||||
multiboot_uint32_t load_end_addr;
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||||
multiboot_uint32_t bss_end_addr;
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||||
};
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||||
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struct multiboot_header_tag_entry_address
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||||
{
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||||
multiboot_uint16_t type;
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||||
multiboot_uint16_t flags;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t entry_addr;
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||||
};
|
||||
|
||||
struct multiboot_header_tag_console_flags
|
||||
{
|
||||
multiboot_uint16_t type;
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||||
multiboot_uint16_t flags;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t console_flags;
|
||||
};
|
||||
|
||||
struct multiboot_header_tag_framebuffer
|
||||
{
|
||||
multiboot_uint16_t type;
|
||||
multiboot_uint16_t flags;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t width;
|
||||
multiboot_uint32_t height;
|
||||
multiboot_uint32_t depth;
|
||||
};
|
||||
|
||||
struct multiboot_header_tag_module_align
|
||||
{
|
||||
multiboot_uint16_t type;
|
||||
multiboot_uint16_t flags;
|
||||
multiboot_uint32_t size;
|
||||
};
|
||||
|
||||
struct multiboot_header_tag_relocatable
|
||||
{
|
||||
multiboot_uint16_t type;
|
||||
multiboot_uint16_t flags;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t min_addr;
|
||||
multiboot_uint32_t max_addr;
|
||||
multiboot_uint32_t align;
|
||||
multiboot_uint32_t preference;
|
||||
};
|
||||
|
||||
struct multiboot_color
|
||||
{
|
||||
multiboot_uint8_t red;
|
||||
multiboot_uint8_t green;
|
||||
multiboot_uint8_t blue;
|
||||
};
|
||||
|
||||
struct multiboot_mmap_entry
|
||||
{
|
||||
multiboot_uint64_t addr;
|
||||
multiboot_uint64_t len;
|
||||
#define MULTIBOOT_MEMORY_AVAILABLE 1
|
||||
#define MULTIBOOT_MEMORY_RESERVED 2
|
||||
#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
|
||||
#define MULTIBOOT_MEMORY_NVS 4
|
||||
#define MULTIBOOT_MEMORY_BADRAM 5
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t zero;
|
||||
};
|
||||
typedef struct multiboot_mmap_entry multiboot_memory_map_t;
|
||||
|
||||
struct multiboot_tag
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
};
|
||||
|
||||
struct multiboot_tag_string
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
char string[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_module
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t mod_start;
|
||||
multiboot_uint32_t mod_end;
|
||||
char cmdline[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_basic_meminfo
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t mem_lower;
|
||||
multiboot_uint32_t mem_upper;
|
||||
};
|
||||
|
||||
struct multiboot_tag_bootdev
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t biosdev;
|
||||
multiboot_uint32_t slice;
|
||||
multiboot_uint32_t part;
|
||||
};
|
||||
|
||||
struct multiboot_tag_mmap
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t entry_size;
|
||||
multiboot_uint32_t entry_version;
|
||||
struct multiboot_mmap_entry entries[0];
|
||||
};
|
||||
|
||||
struct multiboot_vbe_info_block
|
||||
{
|
||||
multiboot_uint8_t external_specification[512];
|
||||
};
|
||||
|
||||
struct multiboot_vbe_mode_info_block
|
||||
{
|
||||
multiboot_uint8_t external_specification[256];
|
||||
};
|
||||
|
||||
struct multiboot_tag_vbe
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
|
||||
multiboot_uint16_t vbe_mode;
|
||||
multiboot_uint16_t vbe_interface_seg;
|
||||
multiboot_uint16_t vbe_interface_off;
|
||||
multiboot_uint16_t vbe_interface_len;
|
||||
|
||||
struct multiboot_vbe_info_block vbe_control_info;
|
||||
struct multiboot_vbe_mode_info_block vbe_mode_info;
|
||||
};
|
||||
|
||||
struct multiboot_tag_framebuffer_common
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
|
||||
multiboot_uint64_t framebuffer_addr;
|
||||
multiboot_uint32_t framebuffer_pitch;
|
||||
multiboot_uint32_t framebuffer_width;
|
||||
multiboot_uint32_t framebuffer_height;
|
||||
multiboot_uint8_t framebuffer_bpp;
|
||||
#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
|
||||
#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
|
||||
#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
|
||||
multiboot_uint8_t framebuffer_type;
|
||||
multiboot_uint16_t reserved;
|
||||
};
|
||||
|
||||
struct multiboot_tag_framebuffer
|
||||
{
|
||||
struct multiboot_tag_framebuffer_common common;
|
||||
|
||||
union
|
||||
{
|
||||
struct
|
||||
{
|
||||
multiboot_uint16_t framebuffer_palette_num_colors;
|
||||
struct multiboot_color framebuffer_palette[0];
|
||||
};
|
||||
struct
|
||||
{
|
||||
multiboot_uint8_t framebuffer_red_field_position;
|
||||
multiboot_uint8_t framebuffer_red_mask_size;
|
||||
multiboot_uint8_t framebuffer_green_field_position;
|
||||
multiboot_uint8_t framebuffer_green_mask_size;
|
||||
multiboot_uint8_t framebuffer_blue_field_position;
|
||||
multiboot_uint8_t framebuffer_blue_mask_size;
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
struct multiboot_tag_elf_sections
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t num;
|
||||
multiboot_uint32_t entsize;
|
||||
multiboot_uint32_t shndx;
|
||||
char sections[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_apm
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint16_t version;
|
||||
multiboot_uint16_t cseg;
|
||||
multiboot_uint32_t offset;
|
||||
multiboot_uint16_t cseg_16;
|
||||
multiboot_uint16_t dseg;
|
||||
multiboot_uint16_t flags;
|
||||
multiboot_uint16_t cseg_len;
|
||||
multiboot_uint16_t cseg_16_len;
|
||||
multiboot_uint16_t dseg_len;
|
||||
};
|
||||
|
||||
struct multiboot_tag_efi32
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t pointer;
|
||||
};
|
||||
|
||||
struct multiboot_tag_efi64
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint64_t pointer;
|
||||
};
|
||||
|
||||
struct multiboot_tag_smbios
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint8_t major;
|
||||
multiboot_uint8_t minor;
|
||||
multiboot_uint8_t reserved[6];
|
||||
multiboot_uint8_t tables[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_old_acpi
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint8_t rsdp[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_new_acpi
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint8_t rsdp[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_network
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint8_t dhcpack[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_efi_mmap
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t descr_size;
|
||||
multiboot_uint32_t descr_vers;
|
||||
multiboot_uint8_t efi_mmap[0];
|
||||
};
|
||||
|
||||
struct multiboot_tag_efi32_ih
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t pointer;
|
||||
};
|
||||
|
||||
struct multiboot_tag_efi64_ih
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint64_t pointer;
|
||||
};
|
||||
|
||||
struct multiboot_tag_load_base_addr
|
||||
{
|
||||
multiboot_uint32_t type;
|
||||
multiboot_uint32_t size;
|
||||
multiboot_uint32_t load_base_addr;
|
||||
};
|
||||
|
||||
#endif /* ! ASM_FILE */
|
||||
|
||||
#endif /* ! MULTIBOOT_HEADER */
|
||||
|
|
@ -0,0 +1,38 @@
|
|||
#=----------------------------------------------------------------------------=#
|
||||
# GNU GPL OS/K #
|
||||
# #
|
||||
# Desc: Simple OS/K image mount script #
|
||||
# #
|
||||
# #
|
||||
# Copyright © 2018-2019 The OS/K Team #
|
||||
# #
|
||||
# This file is part of OS/K. #
|
||||
# #
|
||||
# OS/K is free software: you can redistribute it and/or modify #
|
||||
# it under the terms of the GNU General Public License as published by #
|
||||
# the Free Software Foundation, either version 3 of the License, or #
|
||||
# any later version. #
|
||||
# #
|
||||
# OS/K is distributed in the hope that it will be useful, #
|
||||
# but WITHOUT ANY WARRANTY# without even the implied warranty of #
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
|
||||
# GNU General Public License for more details. #
|
||||
# #
|
||||
# You should have received a copy of the GNU General Public License #
|
||||
# along with OS/K. If not, see <https://www.gnu.org/licenses/>. #
|
||||
#=----------------------------------------------------------------------------=#
|
||||
|
||||
#Color codes
|
||||
CL='\033[0;32m'
|
||||
CL2='\033[1;36m'
|
||||
CL3='\033[0m'
|
||||
NC='\033[1;37m'
|
||||
|
||||
set -e #exit if error
|
||||
|
||||
echo ${CL2}[mount.sh]${NC} Mouting image... \(losetup\)${CL3}
|
||||
sudo losetup -D > /dev/null
|
||||
sudo losetup /dev/loop0 $1 -o 1048576 /dev/null #mounting the logical partition
|
||||
echo ${CL2}[mount.sh]${NC} Mouting volume... \(mount\)${CL3}
|
||||
sudo mount -t vfat /dev/loop0 $2 -o rw,uid=$(id -u),gid=$(id -g) > /dev/null
|
||||
echo ${CL2}[mount.sh]${CL} Terminated without error.${CL3}
|
||||
Binary file not shown.
|
|
@ -0,0 +1,37 @@
|
|||
#=----------------------------------------------------------------------------=#
|
||||
# GNU GPL OS/K #
|
||||
# #
|
||||
# Desc: Simple unmount script #
|
||||
# #
|
||||
# #
|
||||
# Copyright © 2018-2019 The OS/K Team #
|
||||
# #
|
||||
# This file is part of OS/K. #
|
||||
# #
|
||||
# OS/K is free software: you can redistribute it and/or modify #
|
||||
# it under the terms of the GNU General Public License as published by #
|
||||
# the Free Software Foundation, either version 3 of the License, or #
|
||||
# any later version. #
|
||||
# #
|
||||
# OS/K is distributed in the hope that it will be useful, #
|
||||
# but WITHOUT ANY WARRANTY# without even the implied warranty of #
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
|
||||
# GNU General Public License for more details. #
|
||||
# #
|
||||
# You should have received a copy of the GNU General Public License #
|
||||
# along with OS/K. If not, see <https://www.gnu.org/licenses/>. #
|
||||
#=----------------------------------------------------------------------------=#
|
||||
|
||||
#Color codes
|
||||
CL='\033[0;32m'
|
||||
CL2='\033[1;36m'
|
||||
CL3='\033[0m'
|
||||
NC='\033[1;37m'
|
||||
|
||||
set -e #exit if error
|
||||
sleep 3
|
||||
echo ${CL2}[umount.sh]${NC} Unmounting volume... \(umount\)${CL3}
|
||||
sudo umount $1
|
||||
echo ${CL2}[umount.sh]${NC} Unmounting image... \(losetup\)${CL3}
|
||||
sudo losetup -D
|
||||
echo ${CL2}[umount.sh]${CL} Terminated without error.${CL3}
|
||||
|
|
@ -25,16 +25,41 @@
|
|||
|
||||
%define DEBUG
|
||||
|
||||
[BITS 16]
|
||||
[ORG 0x1000]
|
||||
[BITS 32]
|
||||
[global _start]
|
||||
[ORG 0x100000] ; Where GRUB loads us.
|
||||
|
||||
%include "boot/loader/multiboot.inc"
|
||||
|
||||
_start:
|
||||
mov ax, cs ; correcting cs after the horrible far jump
|
||||
mov ds, ax ; hm... And ds too
|
||||
mov es, ax ; And es because it is jealous
|
||||
|
||||
mov [Bootdrv], dl
|
||||
xor dl, dl
|
||||
jmp 0x0000:main
|
||||
jmp 0x0000:main ; pas sûr
|
||||
multiboot_header:
|
||||
|
||||
align 4
|
||||
dd MB_HEADER_MAGIC
|
||||
dd MB_HEADER_FLAGS
|
||||
dd CHECKSUM
|
||||
dd multiboot_header ; Header address
|
||||
dd _start ; Address of code entry point
|
||||
dd 00 ; (end of code) not necessary
|
||||
dd 00 ; (bss) not necessary
|
||||
dd MB_start ; entry address GRUB will start at
|
||||
|
||||
MB_start:
|
||||
mov esp, KERNEL_STACK ; Setup the stack
|
||||
push 0 ; Reset EFLAGS
|
||||
popf
|
||||
push eax ; 2nd argument is magic number
|
||||
push ebx ; 1st argument multiboot info pointer
|
||||
call main
|
||||
add esp, 8 ; Cleanup 8 bytes pushed as arguments
|
||||
jmp Die
|
||||
|
||||
%include "boot/loader/cpu/cpuid.asm"
|
||||
%include "boot/loader/io/rmterm.asm"
|
||||
|
|
@ -42,37 +67,6 @@ jmp 0x0000:main
|
|||
|
||||
main:
|
||||
|
||||
;; compatibility check
|
||||
push si
|
||||
mov si, Init
|
||||
call PrintB
|
||||
pop si
|
||||
|
||||
call Is64bits
|
||||
|
||||
jc ErrorNo64
|
||||
push si
|
||||
mov si, Pass
|
||||
call PrintB
|
||||
pop si
|
||||
|
||||
;; Enabling A20
|
||||
push si
|
||||
mov si, EnA20
|
||||
call PrintB
|
||||
pop si
|
||||
|
||||
call set_a20
|
||||
|
||||
push si
|
||||
mov si, Pass
|
||||
call PrintB
|
||||
pop si
|
||||
|
||||
;; DISABLING CURSOR BLINKING AND GETTING INFOS
|
||||
call get_dimensions
|
||||
call disable_cursor
|
||||
|
||||
;;GO GDT64
|
||||
cli ; disable interrupts
|
||||
lgdt [GDT64]
|
||||
|
|
@ -92,10 +86,6 @@ main:
|
|||
push dword [VGA_HEIGHT]
|
||||
jmp (CODE_SELECTOR-GDT64):main32
|
||||
|
||||
;; THE HOLE ----------------------------------------------------------------- ;;
|
||||
ErrorNo64:
|
||||
mov si, NoLongMode
|
||||
call PrintB
|
||||
Die:
|
||||
cli
|
||||
hlt ; die nooooow
|
||||
|
|
|
|||
|
|
@ -0,0 +1,33 @@
|
|||
;=----------------------------------------------------------------------------=;
|
||||
; GNU GPL OS/K ;
|
||||
; ;
|
||||
; Desc: Multiboot header ;
|
||||
; (x86_64 architecture only) ;
|
||||
; ;
|
||||
; ;
|
||||
; Copyright © 2018-2019 The OS/K Team ;
|
||||
; ;
|
||||
; This file is part of OS/K. ;
|
||||
; ;
|
||||
; OS/K is free software: you can redistribute it and/or modify ;
|
||||
; it under the terms of the GNU General Public License as published by ;
|
||||
; the Free Software Foundation, either version 3 of the License, or ;
|
||||
; (at your option) any later version. ;
|
||||
; ;
|
||||
; OS/K is distributed in the hope that it will be useful, ;
|
||||
; but WITHOUT ANY WARRANTY; without even the implied warranty of ;
|
||||
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;
|
||||
; GNU General Public License for more details. ;
|
||||
; ;
|
||||
; You should have received a copy of the GNU General Public License ;
|
||||
; along with OS/K. If not, see <https://www.gnu.org/licenses/>. ;
|
||||
;=----------------------------------------------------------------------------=;
|
||||
|
||||
;; MULTIBOOT HEADER
|
||||
%define MB_AOUT_KLUDGE 1 << 16 ; We are not an ELF executable
|
||||
%define MB_ALIGN 1 << 0 ; Ask to align loaded modules on page boundaries
|
||||
%define MB_MEMINFO 1 << 1 ; Ask to provide memory map
|
||||
%define MB_HEADER_MAGIC 0x1BADB002
|
||||
%define MB_HEADER_FLAGS MB_AOUT_KLUDGE|MB_ALIGN|MB_MEMINFO
|
||||
%define CHECKSUM -(MB_HEADER_MAGIC + MB_HEADER_FLAGS)
|
||||
%define KERNEL_STACK 0x00200000 ; Stack starts at the 2mb address & grows down
|
||||
191
boot/mbr/mbr.asm
191
boot/mbr/mbr.asm
|
|
@ -1,191 +0,0 @@
|
|||
;=----------------------------------------------------------------------------=;
|
||||
; GNU GPL OS/K ;
|
||||
; ;
|
||||
; Desc: Bootsector for OS/K ;
|
||||
; (x86_64 architecture only) ;
|
||||
; ;
|
||||
; ;
|
||||
; Copyright © 2018-2019 The OS/K Team ;
|
||||
; ;
|
||||
; This file is part of OS/K. ;
|
||||
; ;
|
||||
; OS/K is free software: you can redistribute it and/or modify ;
|
||||
; it under the terms of the GNU General Public License as published by ;
|
||||
; the Free Software Foundation, either version 3 of the License, or ;
|
||||
; any later version. ;
|
||||
; ;
|
||||
; OS/K is distributed in the hope that it will be useful, ;
|
||||
; but WITHOUT ANY WARRANTY; without even the implied warranty of ;
|
||||
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;
|
||||
; GNU General Public License for more details. ;
|
||||
; ;
|
||||
; You should have received a copy of the GNU General Public License ;
|
||||
; along with OS/K. If not, see <https://www.gnu.org/licenses/>. ;
|
||||
;=----------------------------------------------------------------------------=;
|
||||
|
||||
;; BOOT "SEGMENT"
|
||||
%define BOOT_SEG 0x07c0 ; (BOOT_SEG << 4) + BOOT_OFF = 0x007c00
|
||||
%define BOOT_OFF 0x0000
|
||||
|
||||
;; STACK "SEGMENT"
|
||||
%define STACK_SEG 0x0600 ; (STACK_SEG << 4) + STACK_OFF = 0x007000
|
||||
%define STACK_OFF 0x1000
|
||||
|
||||
;; DISK BUFFER "SEGMENT"
|
||||
%define BUFFER_SEG 0x2000 ; (BUFFER_SEG << 4) + BUFFER_OFF = 0x020000
|
||||
%define BUFFER_OFF 0x0000
|
||||
|
||||
;; SECOND STAGE LOADER "SEGMENT"
|
||||
%define LOAD_SEG 0x0000 ; (LOAD_SEG << 4) + LOAD_OFF = 0x001000
|
||||
%define LOAD_OFF 0x1000
|
||||
|
||||
[BITS 16] ; Ensure 16-bit code (because fuck UEFI)
|
||||
|
||||
Intro:
|
||||
|
||||
jmp short _start ; Jump over the BIOS PARAMETER BLOCK
|
||||
nop ; Required by BIOS to recognize the Disk loul
|
||||
BPB:
|
||||
;---------------------------------------------------;
|
||||
; Disk description table ;
|
||||
;---------------------------------------------------;
|
||||
%define OEMName bp+0x03 ; Disk label
|
||||
%define bytesPerSector bp+0x0b ; Bytes per sector
|
||||
%define sectorsPerCluster bp+0x0d ; Sectors per cluster
|
||||
%define reservedSectors bp+0x0e ; Reserved sectors
|
||||
%define fats bp+0x10 ; Number of fats
|
||||
%define rootDirEntries bp+0x11 ; Number of entries in root dir
|
||||
%define sectors bp+0x13 ; Logical sectors
|
||||
%define mediaType bp+0x15 ; Media descriptor byte
|
||||
%define fatSectors bp+0x16 ; Sectors per FAT
|
||||
%define sectorsPerTrack bp+0x18 ; Sectors per track
|
||||
%define heads bp+0x1a ; Number of sides/heads
|
||||
%define hiddenSectors bp+0x1c ; Hidden sectors
|
||||
%define hugeSectors bp+0x20 ; LBA sectors
|
||||
%define biosBootdrvNum bp+0x24 ; Bootdrv number
|
||||
%define reserved bp+0x25 ; This is not used
|
||||
%define bootSignature bp+0x26 ; Bootdrv signature
|
||||
%define volumeId bp+0x27 ; Volume ID
|
||||
%define volumeLabel bp+0x2b ; Volume Label
|
||||
%define fatTypeLabel bp+0x36 ; File system type
|
||||
|
||||
times 0x3b db 0x00 ; ALLOCATE THE SECTORS FOR THE BPB
|
||||
|
||||
;; ENTRY POINT
|
||||
_start:
|
||||
jmp BOOT_SEG:$+5 ; Fix the cs:ip registers with a vaudou magical trip
|
||||
|
||||
bootstrap:
|
||||
jmp go
|
||||
|
||||
;; LOVELY DATA
|
||||
FileNotFound db "First Stage ERROR : NO LOADER", 0
|
||||
DiskError db "First Stage ERROR : DISK", 0
|
||||
UserData dw 0
|
||||
Bootdrv db 0
|
||||
filename db "LOADER BIN"
|
||||
|
||||
|
||||
;; GO !
|
||||
go:
|
||||
mov ax, BOOT_SEG ; Set segments to the location of the bootloader
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
|
||||
;; INIT STACK
|
||||
cli
|
||||
mov ax, STACK_SEG ; Init the stack
|
||||
mov ss, ax ; Continue init the stack
|
||||
mov sp, STACK_OFF ; Ok man, the stack is in 4K :O
|
||||
sti
|
||||
mov bp, (0x7c0-STACK_SEG) << 4 ; Correct bp (the disk description table)
|
||||
|
||||
;; INITIALIZE BOOT DISK
|
||||
or dl, dl ; Verifying dl points actually to the boot drive
|
||||
jz load_root
|
||||
mov byte [Bootdrv], dl ; Another soul (the disk) saved!
|
||||
mov ah, 0x08
|
||||
int 0x13 ; int 0x13 : read drive parameters/geom
|
||||
jc load_root
|
||||
and cx, 0x003f ; Maximum sector number is the high bits 6-7 of cl
|
||||
mov word [sectorsPerTrack], cx ; And whose low 8 bits are in ch
|
||||
mov dl, dh ; Convert the maximum head number to a word with another vaudou magical trip
|
||||
xor dh, dh
|
||||
inc dx ; because head numbers start at zero
|
||||
mov word [heads], dx ; Another soul (the heads number) saved!
|
||||
|
||||
|
||||
;; LOAD THE ROOT DIRECTORY FROM DISK
|
||||
load_root:
|
||||
xor cx, cx
|
||||
mov ax, 32 ; Size of root dir = (rootDirEntries * 32) / bytesPerSector
|
||||
mul word [rootDirEntries] ; multiply by the total size of the root directory
|
||||
div word [bytesPerSector] ; divide by the number of bytes used per sector
|
||||
xchg cx, ax
|
||||
|
||||
mov al, byte [fats] ; Location of root dir = (fats * fatSectors) + reservedSectors
|
||||
mul word [fatSectors] ; multiply by the sectors used
|
||||
add ax, word [reservedSectors] ; increase ax by the reserved sectors
|
||||
mov word [UserData], ax ; Start of user data = startOfRoot + numberOfRoot
|
||||
add word [UserData], cx ; Add the size and location of the root directory
|
||||
|
||||
mov di, BUFFER_SEG ; Set the extra segment to the disk buffer
|
||||
mov es, di
|
||||
mov di, BUFFER_OFF ; Set es:di and load the root directory into the disk buffer
|
||||
call read_sectors ; Read the sectors
|
||||
|
||||
;; FIND THE SECOND STAGE LOADER
|
||||
mov di, BUFFER_OFF ; Set es:di to the disk buffer
|
||||
mov cx, word [rootDirEntries] ; Search through all of the root dir entries
|
||||
xor ax, ax ; Clear ax for the file entry offset
|
||||
|
||||
search_root:
|
||||
xchg cx, dx ; Save cx because it's a loop counter
|
||||
mov si, filename ; Load the filename
|
||||
mov cx, 11 ; Compare first 11 bytes
|
||||
rep cmpsb ; Compare si and di cx times
|
||||
je load_fat ; We found the loader
|
||||
add ax, 32 ; File entry offset
|
||||
mov di, BUFFER_OFF ; Point back to the start of the entry
|
||||
add di, ax ; Add the offset to point to the next entry
|
||||
xchg dx, cx
|
||||
loop search_root ; Continue to search for the file
|
||||
|
||||
;; ERROR...
|
||||
mov si, FileNotFound ; Could not find the file
|
||||
call print
|
||||
call reboot
|
||||
|
||||
;; LOAD THE FAT FROM THE FILE
|
||||
load_fat:
|
||||
mov ax, word [es:di + 15] ; Get the file cluster at offset 26
|
||||
push ax ; Store the FAT cluster
|
||||
xor ax, ax ; Size of fat = (fats * fatSectors)
|
||||
mov al, byte [fats] ; Move number of fats into al
|
||||
mul word [fatSectors] ; Move fat sectors into bx
|
||||
mov cx, ax ; Store in cx
|
||||
mov ax, word [reservedSectors] ; Convert the first fat on the disk
|
||||
mov di, BUFFER_OFF ; Set es:di and load the fat sectors into the disk buffer
|
||||
call read_sectors ; Read the sectors
|
||||
|
||||
;; LOAD THE CLUSTERS OF THE LOADER AND JUMP
|
||||
mov di, LOAD_SEG
|
||||
mov es, di ; Set es:bx to where the file will load
|
||||
mov di, LOAD_OFF
|
||||
pop ax ; File cluster restored
|
||||
call read_clusters ; Read clusters from the file
|
||||
mov dl, byte [Bootdrv] ; Pass the boot Bootdrv into dl
|
||||
jmp LOAD_SEG:LOAD_OFF ; Jump to the file loaded!
|
||||
|
||||
hlt ; This should never be hit...
|
||||
; ...
|
||||
; ...
|
||||
; I hope....
|
||||
; ...
|
||||
call reboot
|
||||
|
||||
%include "boot/mbr/mbr.inc"
|
||||
|
||||
;; END
|
||||
times 510 - ($ - $$) db 0 ; Pad remainder of boot sector with zeros
|
||||
dw 0xaa55 ; Boot signature
|
||||
177
boot/mbr/mbr.inc
177
boot/mbr/mbr.inc
|
|
@ -1,177 +0,0 @@
|
|||
;=----------------------------------------------------------------------------=;
|
||||
; GNU GPL OS/K ;
|
||||
; ;
|
||||
; Desc: Bootsector for OS/K INCLUDED FUNCTIONS ;
|
||||
; (x86_64 architecture only) ;
|
||||
; ;
|
||||
; ;
|
||||
; Copyright © 2018-2019 The OS/K Team ;
|
||||
; ;
|
||||
; This file is part of OS/K. ;
|
||||
; ;
|
||||
; OS/K is free software: you can redistribute it and/or modify ;
|
||||
; it under the terms of the GNU General Public License as published by ;
|
||||
; the Free Software Foundation, either version 3 of the License, or ;
|
||||
; any later version. ;
|
||||
; ;
|
||||
; OS/K is distributed in the hope that it will be useful, ;
|
||||
; but WITHOUT ANY WARRANTY; without even the implied warranty of ;
|
||||
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;
|
||||
; GNU General Public License for more details. ;
|
||||
; ;
|
||||
; You should have received a copy of the GNU General Public License ;
|
||||
; along with OS/K. If not, see <https://www.gnu.org/licenses/>. ;
|
||||
;=----------------------------------------------------------------------------=;
|
||||
|
||||
[BITS 16]
|
||||
|
||||
read_clusters:
|
||||
;---------------------------------------------------;
|
||||
; Read file clusters, starting at the given cluster,;
|
||||
; expects FAT to be loaded into the disk buffer. ;
|
||||
; Please note that this may allocate up to 128KB ;
|
||||
; of ram. ;
|
||||
; ;
|
||||
; Expects: AX = Starting cluster ;
|
||||
; ES:DI = Location to load clusters ;
|
||||
; ;
|
||||
; Returns: None ;
|
||||
; ;
|
||||
;---------------------------------------------------;
|
||||
pusha
|
||||
push es
|
||||
.cluster_loop:
|
||||
xor bh, bh
|
||||
xor dx, dx
|
||||
push ax ; Get the cluster start = (cluster - 2) * sectorsPerCluster + UserData
|
||||
sub ax, 2 ; Subtract 2
|
||||
mov bl, byte [sectorsPerCluster] ; Sectors per cluster is a byte value
|
||||
mul bx ; multiply (cluster - 2) * sectorsPerCluster
|
||||
add ax, word [UserData] ; add the UserData
|
||||
xor ch, ch
|
||||
mov cl, byte [sectorsPerCluster] ; Sectors to read
|
||||
call read_sectors ; Read the sectors
|
||||
pop ax ; Current cluster number
|
||||
xor dx, dx
|
||||
;; Calculate next sector for FAT16 (cluster * 2)
|
||||
mov bx, 2 ; Multiply the cluster by two (cluster is in ax)
|
||||
mul bx
|
||||
;; Load sector in RAM
|
||||
push ds
|
||||
push si
|
||||
mov si, BUFFER_SEG
|
||||
mov ds, si ; Temporarly set ds:si to the FAT buffer
|
||||
mov si, BUFFER_OFF
|
||||
add si, ax ; Point to the next cluster in the FAT entry
|
||||
mov ax, word [ds:si] ; Load ax to the next cluster in FAT
|
||||
pop si
|
||||
pop ds
|
||||
;; Next
|
||||
cmp ax, 0xfff8 ; Check if we are at the end of the file?
|
||||
jae .done
|
||||
add di, 512 ; Add to the pointer offset
|
||||
jnc .cluster_loop
|
||||
;; Correct the buffer because an error will occur if the buffer in memory
|
||||
mov dx, es ; overlaps a 64k page boundry, when di overflows
|
||||
add dh, 0x10 ; it will trigger the carry flag, so correct
|
||||
mov es, dx ; extra segment by 0x1000
|
||||
jmp .cluster_loop ; Load the next file cluster
|
||||
.done:
|
||||
pop es
|
||||
popa
|
||||
ret
|
||||
|
||||
|
||||
read_sectors:
|
||||
;---------------------------------------------------;
|
||||
; Read sectors starting at a given sector by ;
|
||||
; the given times and load into a buffer. Please ;
|
||||
; note that this may allocate up to 128KB of ram. ;
|
||||
; ;
|
||||
; Expects: AX = Starting sector ;
|
||||
; CX = Number of sectors to read ;
|
||||
; ES:DI = Location to load sectors ;
|
||||
; ;
|
||||
; Returns: None ;
|
||||
; ;
|
||||
;---------------------------------------------------;
|
||||
pusha
|
||||
push es
|
||||
mov bx, di ; Convert es:di to es:bx for int 13h
|
||||
.sector_loop:
|
||||
push ax
|
||||
push cx
|
||||
xor dx, dx
|
||||
div word [sectorsPerTrack] ; Divide the lba (value in ax) by sectorsPerTrack
|
||||
mov cx, dx ; Save the absolute sector value
|
||||
inc cx
|
||||
xor dx, dx ; Divide by the number of heads
|
||||
div word [heads] ; to get absolute head and track values
|
||||
mov dh, dl ; Move the absolute head into dh
|
||||
mov ch, al ; Low 8 bits of absolute track
|
||||
shl ah, 1 ; High 2 bits of absolute track
|
||||
shl ah, 1
|
||||
shl ah, 1
|
||||
shl ah, 1
|
||||
shl ah, 1
|
||||
shl ah, 1
|
||||
or cl, ah ; Now cx is set with respective track and sector numbers
|
||||
mov dl, byte [Bootdrv] ; Set correct Bootdrv for int 13h
|
||||
mov di, 21 ; Try five times to read the sector because I love 21
|
||||
.attempt_read:
|
||||
mov ax, 0x0201 ; Read Sectors func of int 13h, read one sector
|
||||
int 0x13 ; Call int 13h (BIOS disk I/O)
|
||||
jnc .read_ok ; If no carry set, the sector has been read
|
||||
xor ah, ah ; Reset Bootdrv func of int 13h
|
||||
int 0x13 ; Call int 13h (BIOS disk I/O)
|
||||
dec di ; Decrease read attempt counter
|
||||
jnz .attempt_read ; Try to read the sector again
|
||||
mov si, DiskError ; Error reading the disk :/
|
||||
call print
|
||||
jmp reboot
|
||||
.read_ok:
|
||||
pop cx
|
||||
pop ax
|
||||
inc ax ; Increase the next sector to read
|
||||
add bx, word [bytesPerSector] ; Add to the buffer address for the next sector
|
||||
jnc .next_sector
|
||||
;; Fixing buffer because an error will occur if the buffer in memory
|
||||
mov dx, es ; overlaps a 64k page boundry, when bx overflows
|
||||
add dh, 0x10 ; it will trigger the carry flag, so correct
|
||||
mov es, dx ; es segment by 0x1000
|
||||
.next_sector:
|
||||
loop .sector_loop
|
||||
pop es
|
||||
popa
|
||||
ret
|
||||
|
||||
print:
|
||||
;---------------------------------------------------;
|
||||
; Print out a simple string. ;
|
||||
; ;
|
||||
; Expects: DS:SI = String to print ;
|
||||
; ;
|
||||
; Returns: None ;
|
||||
; ;
|
||||
;---------------------------------------------------;
|
||||
lodsb ; Load byte from ds:si to al
|
||||
or al, al ; If al is empty stop looping
|
||||
jz .done ; Done looping and return
|
||||
mov ah, 0x0e ; Teletype output
|
||||
int 0x10 ; Video interupt
|
||||
jmp print ; Loop untill string is null
|
||||
.done:
|
||||
ret
|
||||
|
||||
reboot:
|
||||
xor ax, ax
|
||||
int 0x16 ; Get a single keypress
|
||||
mov ah, 0x0e ; Teletype output
|
||||
mov al, 0x0d ; Carriage return
|
||||
int 0x10 ; Video interupt
|
||||
mov al, 0x0a ; Line feed
|
||||
int 0x10 ; Video interupt
|
||||
mov al, 0x0a ; Line feed
|
||||
int 0x10 ; Video interupt
|
||||
xor ax, ax
|
||||
int 0x19 ; Reboot the system
|
||||
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Loading…
Reference in New Issue