feat: boot sur disque dur par GRUB en multiboot2

debug/system.txt

@@ -1,8 +1,8 @@
 target remote localhost:1234
 set disassembly-flavor intel
 set architecture i386
-break *0x100000
-cont
 symbol-file ./system/system.sys
-clear *0x100000
+break system.c:59
+cont
+clear system.c:59
 display/20i $pc

final/makefile

@@ -1,14 +1,33 @@
-all: cos2000.img
+all: harddisk.img.final floppy.img.final
 
-cos2000.img:
-	(dd if=/dev/zero of=cos2000.img count=2880 bs=512)
-	(mkfs.msdos -F 12 -n "COS2000" cos2000.img)
+harddisk.img.before:
+	(xz -d -k harddisk.img.xz)
+	(dd if=harddisk.img of=harddisk.img.part1 skip=63 bs=512)
+	(dd if=harddisk.img of=harddisk.img.before count=63 bs=512;sync)
 	(mkdir ./mnt -p)
-	(fusefat cos2000.img ./mnt -o rw+)
+
+harddisk.img.final: harddisk.img.before
+	(mount.fuse-ext2 -o rw+ harddisk.img.part1 ./mnt)
+	(cp ../system/system.sys ./mnt/boot/;sync)
+	(fusermount ./mnt -u)
+	(cat harddisk.img.before > harddisk.img.final)
+	(cat harddisk.img.part1 >> harddisk.img.final;sync)
+
+floppy.img.final:
+	(dd if=/dev/zero of=floppy.img.final count=2880 bs=512)
+	(mkfs.msdos -F 12 -n "COS2000" floppy.img.final)
+	(mkdir ./mnt -p)
+	(fusefat floppy.img.final ./mnt -o rw+)
 	(cp ../boot/loader.sys ./mnt/)
 	(cp ../system/system.sys ./mnt/;sync)
 	(fusermount ./mnt -u)
-	(dd if=../boot/boot12.bin of=cos2000.img seek=0 count=1 conv=notrunc;sync)
+	(dd if=../boot/boot12.bin of=floppy.img.final seek=0 count=1 conv=notrunc;sync)
+
+littleclean:
+	rm -f *.final
 
 clean:
+	rm -f *.before
+	rm -f *.part1
 	rm -f *.img
+	rm -f *.final

final/makeimage

@@ -0,0 +1,15 @@
+#!/bin/bash
+dd if=/dev/zero of=cos2000.img count=10 bs=1048576
+parted -s -a cylinder cos2000.img mklabel msdos
+parted -s -a cylinder cos2000.img mkpart primary ext2 63s 10M
+parted -s -a cylinder cos2000.img toggle 1 boot
+lo=`losetup -f`
+echo ${lo}
+losetup -P ${lo} cos2000.img
+mkfs.ext2 ${lo}p1
+mount ${lo}p1 /mnt
+grub-install --no-floppy --install-modules="biosdisk part_msdos ext2 configfile normal multiboot2" --boot-directory=/mnt/boot ${lo} --target=i386-pc
+echo -en "set timeout=4\nset default=0\nmenuentry "cos2000" {\nset root=(hd0,1)\nmultiboot2 /boot/system.sys\nboot\n}" > /mnt/boot/grub/grub.cfg
+umount /mnt
+losetup -d ${lo}
+xz -c cos2000.img > cos2000.img.xz

makefile

@@ -1,10 +1,14 @@
 all:	makall
 
-makall: boot/boot12.bin lib/libs.o system/system.sys 
+makall: lib/libs.o system/system.sys final/harddisk.img.final
 	sync
 
+floppy: boot/boot12.bin final/floppy.img.final
+
+harddisk: final/harddisk.img.final
+
 install:
-	(sudo apt-get install nasm gcc qemu fusefat cgdb)
+	(sudo apt-get install nasm gcc qemu fusefat fuseext2 cgdb)
 
 clean:	
 	(cd system; make clean)
@@ -13,35 +17,44 @@ clean:
 	(cd final;make clean)
 	sync
 
+littleclean:	
+	(cd system; make clean)
+	(cd boot; make clean)
+	(cd lib;make clean)
+	(cd final;make littleclean)
+	sync
+
 backup: clean
-	(cd .. ; tar cf - cosc | gzip -f - > backup.tar.gz ; cd cosc)
-		
-copy: 
-	(cd final; make)
+	(cd .. ; tar cf - Source\ C | gzip -f - > backup.tar.gz)
 
-test: all copy qemu
+test: all harddisk qemu
 
-retest: clean test
+retest: littleclean test
+
+floppytest: floppy qemu-floppy
 
 view:
-	(hexdump  -C ./final/cos2000.img|head -c10000)
+	(hexdump  -C ./final/harddisk.img.final|head -c10000)
 
 debug: debug-system
 
-debug-boot: all copy qemu-debug
+debug-boot: all harddisk qemu-debug
 	(sleep 2;cgdb -x ./debug/boot.txt)
 
-debug-loader: all copy qemu-debug
+debug-loader: all harddisk qemu-debug
 	(sleep 2;cgdb -x ./debug/loader.txt)
 
-debug-system: all copy qemu-debug
+debug-system: all harddisk qemu-debug
 	(sleep 2;cgdb -x ./debug/system.txt)
 
 qemu-debug:
-	(killall qemu-system-i386;qemu-system-i386 -m 1G -fda ./final/cos2000.img -s -S &)
+	(killall qemu-system-i386;qemu-system-i386 -m 1G -drive format=raw,file=./final/harddisk.img.final -s -S &)
 
 qemu:
-	(qemu-system-i386 -m 1G -fda ./final/cos2000.img -s)    
+	(killall qemu-system-i386;qemu-system-i386 -m 1G -drive format=raw,file=./final/harddisk.img.final --enable-kvm -cpu host -s &)  
+
+qemu-floppy:
+	(killall qemu-system-i386;qemu-system-i386 -m 1G -fda ./final/floppy.img.final --enable-kvm -cpu host -s &)  
 	
 system/system.sys:
 	(cd system; make)
@@ -49,5 +62,11 @@ system/system.sys:
 boot/boot12.bin:
 	(cd boot; make)	
 
+final/floppy.img.final:
+	(cd final; make floppy.img.final)
+
+final/harddisk.img.final:
+	(cd final; make harddisk.img.final)	  
+
 lib/libs.o:
 	(cd lib; make)	

system/linker.lds

@@ -7,6 +7,10 @@ ENTRY(mymain)
 SECTIONS
 {
    . = 0x100000;
+    .boot ALIGN(4) :
+    {
+        *(.multiboot)
+    }
    .text  ALIGN(16): { 
         *(.text) 
     }

system/makefile

@@ -1,6 +1,6 @@
 GCC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -fomit-frame-pointer -Wall -w -I ../include -m32 -c -o
 
-LINK=ld -m elf_i386 -T linker.lds -e main -o
+LINK=ld -m elf_i386 -T linker.lds -e main -n -o
 
 all: system.sys
 	sync

system/system.c

@@ -13,6 +13,8 @@
 #include "shell.h"
 #include "syscall.h"
 
+static u8 __attribute__((section(".multiboot"))) magicmultiboot[28]={0xD6,0x50,0x52,0xE8,0x00,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x12,0xaf,0xad,0x17,0x00,0x00,0x00,0x00,0x08,0x00,0x00,0x00};
+
 static u8 warnmsg[] =
     "\033[99C\033[8D\033[37m\033[1m[ \033[36mNON\033[37m  ]\033[0m\000";
 static u8 okmsg[] =
@@ -41,7 +43,7 @@ void error()
 
 int main(void)
 {
-
+asm("movl $0x0000FFFF, %esp");
 	cli();
 	setvmode(0x02);
 	/*  Efface l'ecran   */