mirror of
https://github.com/pbatard/rufus.git
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[mbr] replace gpt.S with a more generic msg.S
* msg.S now reads an ASCII message (with escaped colour sequences) from the following blocks, which is both more flexible and allows for more content to be displayed. * Also adds Bochs testing to the MBR build facility
This commit is contained in:
Pete Batard
David Yeske
parent
a0f4681963
commit
d6b12d38d0
9 changed files with 325 additions and 122 deletions
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@ -17,23 +17,23 @@
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# along with this program; if not, see <http://www.gnu.org/licenses/>.
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# along with this program; if not, see <http://www.gnu.org/licenses/>.
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#
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#
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OBJECTS = mbr.o
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TEST_TARGET = msg
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TARGET = mbr
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ASM = gcc
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ASM = gcc
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CC = gcc
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CC = gcc
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LD = ld
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LD = ld
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OBJDUMP = objdump
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OBJDUMP = objdump
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OBJCOPY = objcopy
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OBJCOPY = objcopy
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CFLAGS = -m32
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CFLAGS = -m32
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LDFLAGS = -nostartfile
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LDFLAGS = -nostartfile
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BOCHS = "C:/Program Files/Bochs/bochsdbg.exe"
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.PHONY: all clean
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.PHONY: all clean
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all: $(TARGET).bin
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all: mbr.bin msg.bin
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clean:
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clean:
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@-rm -f -v *.o *.out $(TARGET).map
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@-rm -f -v *.o *.out *.map *.bin *.img *.ini
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%.o: %.c Makefile
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%.o: %.c Makefile
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@echo "[CC] $@"
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@echo "[CC] $@"
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@ -44,17 +44,25 @@ clean:
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@$(ASM) -c -o $*.o $(CFLAGS) $<
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@$(ASM) -c -o $*.o $(CFLAGS) $<
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# Produce a disassembly dump, for verification purposes
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# Produce a disassembly dump, for verification purposes
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dis: $(TARGET).out
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dis: $(TEST_TARGET).out
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@echo "[DIS] $<"
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@echo "[DIS] $<"
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@$(OBJCOPY) -O binary -j .main --set-section-flags .main=alloc,load,readonly,code $< main.bin
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@$(OBJCOPY) -O binary -j .main --set-section-flags .main=alloc,load,readonly,code $< main.bin
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@$(OBJDUMP) -D -bbinary -mi8086 -Mintel main.bin | less
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@$(OBJDUMP) -D -bbinary -mi8086 -Mintel main.bin | less
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@-rm -f main.bin
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@-rm -f main.bin
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$(TARGET).out: $(OBJECTS) $(TARGET).ld
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# Run the MBR in a Bochs environment (append msg.txt in subsequent blocks)
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@echo "[LD] $@"
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test: $(TEST_TARGET).bin
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@$(LD) $(LDFLAGS) -T$(TARGET).ld -o $@ $(OBJECTS) -Map $(TARGET).map
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@test -s $(BOCHS) || { echo "Error: $(BOCHS) was not found on this system"; exit 1; }
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@cat $(TEST_TARGET).bin msg.txt > disk.img
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@truncate -c -s 10M disk.img
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-@$(BOCHS) -f bochsrc.bxrc -q
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$(TARGET).bin: $(TARGET).out
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%.out: %.o mbr.ld
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@echo "[LD] $@"
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@$(LD) $(LDFLAGS) -Tmbr.ld -o $@ $< -Map $*.map
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%.bin: %.out
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@echo "[MBR] $@"
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@echo "[MBR] $@"
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@# Note: -j only works for sections that have the 'ALLOC' flag set
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@# Note: -j only works for sections that have the 'ALLOC' flag set
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@$(OBJCOPY) -O binary -j .main --gap-fill=0x00 $< $@
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@$(OBJCOPY) -O binary -j .main --gap-fill=0x00 $< $@
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@-rm -f $< $*.map
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58
res/mbr/bochsrc.bxrc
Normal file
58
res/mbr/bochsrc.bxrc
Normal file
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@ -0,0 +1,58 @@
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# configuration file generated by Bochs
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plugin_ctrl: unmapped=true, biosdev=true, speaker=true, extfpuirq=true, parallel=true, serial=true, gameport=true, iodebug=true
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config_interface: win32config
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display_library: win32, options="gui_debug"
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memory: host=32, guest=32
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romimage: file="C:\Program Files\Bochs\BIOS-bochs-latest", address=0x00000000, options=none
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vgaromimage: file="C:\Program Files\Bochs\VGABIOS-lgpl-latest"
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boot: disk
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floppy_bootsig_check: disabled=0
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# no floppya
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# no floppyb
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ata0: enabled=true, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
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ata0-master: type=disk, path="C:\Projects\rufus\res\mbr\disk.img", mode=flat, cylinders=64, heads=10, spt=32, sect_size=512, model="Virtual HDD", biosdetect=auto, translation=lba
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ata0-slave: type=none
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ata1: enabled=true, ioaddr1=0x170, ioaddr2=0x370, irq=15
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ata1-master: type=none
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ata1-slave: type=none
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ata2: enabled=false
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ata3: enabled=false
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optromimage1: file=none
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optromimage2: file=none
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optromimage3: file=none
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optromimage4: file=none
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optramimage1: file=none
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optramimage2: file=none
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optramimage3: file=none
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optramimage4: file=none
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pci: enabled=1, chipset=i440fx
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vga: extension=vbe, update_freq=5, realtime=1
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cpu: count=1, ips=4000000, model=bx_generic, reset_on_triple_fault=1, cpuid_limit_winnt=0, ignore_bad_msrs=1, mwait_is_nop=0
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cpuid: level=6, stepping=3, model=3, family=6, vendor_string="GenuineIntel", brand_string=" Intel(R) Pentium(R) 4 CPU "
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cpuid: mmx=true, apic=xapic, simd=sse2, sse4a=false, misaligned_sse=false, sep=true
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cpuid: movbe=false, adx=false, aes=false, sha=false, xsave=false, xsaveopt=false, x86_64=true
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cpuid: 1g_pages=false, pcid=false, fsgsbase=false, smep=false, smap=false, mwait=true
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cpuid: vmx=1
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print_timestamps: enabled=0
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debugger_log: -
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magic_break: enabled=1
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port_e9_hack: enabled=0
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private_colormap: enabled=0
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clock: sync=none, time0=local, rtc_sync=0
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# no cmosimage
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log: -
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logprefix: %t%e%d
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debug: action=ignore
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info: action=report
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error: action=report
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panic: action=ask
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keyboard: type=mf, serial_delay=250, paste_delay=100000, user_shortcut=none
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mouse: type=ps2, enabled=false, toggle=ctrl+mbutton
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sound: waveoutdrv=win, waveout=none, waveindrv=win, wavein=none, midioutdrv=win, midiout=none
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speaker: enabled=true, mode=sound
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parport1: enabled=true, file=none
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parport2: enabled=false
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com1: enabled=true, mode=null
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com2: enabled=false
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com3: enabled=false
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com4: enabled=false
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100
res/mbr/gpt.S
100
res/mbr/gpt.S
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@ -1,100 +0,0 @@
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/********************************************************************************/
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/* GPT - A protective MBR that displays a notice if a user attempts to boot a */
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/* GPT drive in BIOS/Legacy mode. */
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/* */
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/* Copyright (c) 2019 Pete Batard <pete@akeo.ie> */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the Free */
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/* Software Foundation, either version 3 of the License, or (at your option) */
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/* any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along with */
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/* this program; if not, see <http://www.gnu.org/licenses/>. */
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/* */
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/********************************************************************************/
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/********************************************************************************/
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/* GNU Assembler Settings: */
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/********************************************************************************/
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.intel_syntax noprefix
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.code16
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/********************************************************************************/
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/********************************************************************************/
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/* Constants: */
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/********************************************************************************/
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MBR_ADDR = 0x7c00
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MBR_SIZE = 0x200
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MBR_RESERVED = 0x1b8 # Start of the reserved section (partition table, etc.)
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PT_MAX = 0x04 # Number of partition entries in the partition table
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PT_ENTRY_SIZE = 0x10 # Size of a partition entry in the partition table
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/********************************************************************************/
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/* MBR: This section resides at 0x00007c00 and is exactly 512 bytes */
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/********************************************************************************/
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.section main, "ax"
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.globl mbr
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mbr:
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inc cx
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dec bx
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inc bp
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dec di
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cld
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xor ax, ax
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mov ds, ax
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mov si, offset sep
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call print_string
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mov si, offset hdr
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call print_string
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mov si, offset sep
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call print_string
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mov si, offset txt
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call print_string
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hlt
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print_string:
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lodsb
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cmp al, 0x00
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jz 0f
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mov ah, 0x0e
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mov bx, 0x0007
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int 0x10
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jmp print_string
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0: ret
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/********************************************************************************/
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/* Data section */
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/********************************************************************************/
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sep:
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.string "****************************************\r\n"
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hdr:
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.string "*** ERROR: LEGACY BOOT OF UEFI MEDIA ***\r\n"
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txt:
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.ascii "\r\n" \
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"This drive can only boot in UEFI mode.\r\n" \
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"It can not boot in BIOS/Legacy mode.\r\n" \
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"\r\n" \
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"If you want to boot this drive in BIOS/Legacy mode, you\r\n" \
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"should recreate it in Rufus using the following settings:\r\n" \
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"* Partition scheme -> MBR\r\n" \
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"* Target system -> BIOS...\r\n" \
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"\0"
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/********************************************************************************/
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/* From offset 0x1b8, the MBR contains the partition table and signature data */
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/********************************************************************************/
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.org MBR_RESERVED
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disk_signature:
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.space 0x04
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filler:
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.space 0x02
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partition_table:
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.space PT_ENTRY_SIZE * PT_MAX
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mbr_signature:
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.word 0xAA55
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BIN
res/mbr/gpt.bin
BIN
res/mbr/gpt.bin
Binary file not shown.
220
res/mbr/msg.S
Normal file
220
res/mbr/msg.S
Normal file
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@ -0,0 +1,220 @@
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/********************************************************************************/
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/* MSG - A protective MBR that displays an ASCII message located in the */
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/* following sectors. */
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/* */
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/* Copyright (c) 2019-2020 Pete Batard <pete@akeo.ie> */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the Free */
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/* Software Foundation, either version 3 of the License, or (at your option) */
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/* any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along with */
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/* this program; if not, see <http://www.gnu.org/licenses/>. */
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/* */
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/********************************************************************************/
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/********************************************************************************/
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/* GNU Assembler Settings: */
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/********************************************************************************/
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.intel_syntax noprefix
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.code16
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/********************************************************************************/
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/********************************************************************************/
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/* Constants: */
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/********************************************************************************/
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MBR_ADDR = 0x7c00
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MBR_RESERVED = 0x1b8 # Start of the reserved section (partition table, etc.)
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NB_SECTORS = 0x08 # Number of sectors to read
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PT_MAX = 0x04 # Number of partition entries in the partition table
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PT_ENTRY_SIZE = 0x10 # Size of a partition entry in the partition table
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/********************************************************************************/
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/* Reference list of colours: */
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/* You can escape these numeric values in your message text to set the colours *
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/* for the background and foreground. For instance "\17HIGHLIGHT" will display */
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/* light grey text (0x07) over a blue (0x01) background */
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/********************************************************************************/
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BLACK = 0x00
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BLUE = 0x01
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GREEN = 0x02
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CYAN = 0x03
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RED = 0x04
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MAGENTA = 0x05
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BROWN = 0x06
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LIGHT_GREY = 0x07
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DARK_GREY = 0x08
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LIGHT_BLUE = 0x09
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LIGHT_GREEN = 0x0a
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LIGHT_CYAN = 0x0b
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LIGHT_RED = 0x0c
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LIGHT_MAGENTA = 0x0d
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LIGHT_YELLOW = 0x0e
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WHITE = 0x0f
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/********************************************************************************/
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/* MBR: This section resides at 0x00007c00 and is exactly 512 bytes */
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/********************************************************************************/
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.section main, "ax"
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.globl mbr
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mbr:
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// xchg bx, bx # Uncomment to trigger Bochs magic breakpoint
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inc cx
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dec bx
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inc bp
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dec di
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cld
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xor ax, ax
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cli # Disable interrupts when fiddling with the stack
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mov ss, ax # First order of the day it to set up the stack
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mov sp, MBR_ADDR # This places the stack right before the MBR copy in RAM
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sti
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mov ds, ax # MBR and stack reside in segment 0
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mov bx, 0x0413 # McAfee thinks we are a virus if we use 413 directly...
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mov ax,[bx]
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sub ax, NB_SECTORS / 2 # Amount of RAM we need to read the message sectors
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mov [bx],ax
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shl ax, 6 # Convert to segment address
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mov es, ax # Keep allocated RAM segment in ES
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clear_display:
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mov bh, 0x07
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mov ax, 0x007f
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int 0x10 # Set Video Mode to 640x480 16 color graphics (VGA)
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xor bx, bx
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xor cx, cx
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mov dx, 0x184f
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mov ax, 0x0600
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int 0x10 # Clear screen
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xor dx, dx
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mov ah, 0x02
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int 0x10 # Set cursor pos to top left
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read_sectors: # Copy the next sectors into RAM
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mov ah, 0x41
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mov bx, 0x55aa
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int 0x13
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jb no_ext # failure to get ext
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cmp bx, 0xaa55
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jnz no_ext
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test cx, 1 # is packet access supported?
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jz no_ext
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ext: # http://en.wikipedia.org/wiki/INT_13H#INT_13h_AH.3D42h:_Extended_Read_Sectors_From_Drive
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xor eax, eax
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push eax # bits 32-63 of sector address
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inc eax
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push eax # bits 0-31 of sector address
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push es # destination segment
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push 0x0000 # destination address
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push NB_SECTORS # number of sectors to be read
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push 0x0010 # size of DAP struct
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mov si, sp # DAP address (= stack)
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mov ah, 0x42 # Extended Read Sectors From Drive
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int 0x13
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lahf
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add sp,0x10
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sahf
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jmp check_error
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||||||
|
no_ext: # http://en.wikipedia.org/wiki/INT_13H#INT_13h_AH.3D02h:_Read_Sectors_From_Drive
|
||||||
|
mov ax, 0x0200 + NB_SECTORS
|
||||||
|
mov cx, 0x0002 # Sector address (starts at 1)
|
||||||
|
mov dx, 0x0080 # Drive ID
|
||||||
|
xor bx, bx # Destination address in ES
|
||||||
|
int 0x13
|
||||||
|
|
||||||
|
check_error:
|
||||||
|
mov bx, 0x0007 # Default text to light grey on black
|
||||||
|
jc display_err
|
||||||
|
|
||||||
|
display_msg: # Display the message
|
||||||
|
xor si, si
|
||||||
|
mov ax, es
|
||||||
|
mov ds, ax
|
||||||
|
call print_msg
|
||||||
|
jmp halt_system
|
||||||
|
|
||||||
|
display_err: # Read error -> display shorter message from this MBR
|
||||||
|
mov si, offset err_msg
|
||||||
|
call print_msg
|
||||||
|
|
||||||
|
halt_system: # Halt the system
|
||||||
|
hlt
|
||||||
|
jmp halt_system # Just in case...
|
||||||
|
|
||||||
|
/********************************************************************************/
|
||||||
|
/* Subroutines */
|
||||||
|
/********************************************************************************/
|
||||||
|
|
||||||
|
print_msg: # Print NUL terminated string in DS:SI to console
|
||||||
|
lodsb
|
||||||
|
cmp al, 0x00 # NUL?
|
||||||
|
jz 4f
|
||||||
|
cmp al, 0x0d # Ignore CR
|
||||||
|
jz print_msg
|
||||||
|
cmp al, 0x0a # Handle LF
|
||||||
|
jnz 0f
|
||||||
|
push bx
|
||||||
|
mov ah, 0x03
|
||||||
|
int 0x10 # Get Cursor pos
|
||||||
|
inc dh # Move to next line
|
||||||
|
mov dl, 0 # Set column to 0
|
||||||
|
mov ah, 0x02
|
||||||
|
int 0x10 # Set Cursor pos
|
||||||
|
pop bx
|
||||||
|
jmp print_msg
|
||||||
|
0: cmp al, 0x5c # '\' Escape sequence to set FG/BG color
|
||||||
|
jnz 3f
|
||||||
|
mov cl, 2
|
||||||
|
1: lodsb
|
||||||
|
cmp al, 0x46
|
||||||
|
jg print_msg # Invalid escape sequence
|
||||||
|
sub al, 0x30 # '0'
|
||||||
|
cmp al, 0x09
|
||||||
|
jle 2f
|
||||||
|
sub al, 0x07
|
||||||
|
2: shl bl, 4
|
||||||
|
and al, 0x0f
|
||||||
|
or bl, al
|
||||||
|
dec cl
|
||||||
|
jnz 1b
|
||||||
|
jmp print_msg
|
||||||
|
3: mov cx, 0x0001
|
||||||
|
mov ah, 0x09
|
||||||
|
int 0x10
|
||||||
|
push bx
|
||||||
|
xor bx, bx
|
||||||
|
mov ah, 0x03
|
||||||
|
int 0x10
|
||||||
|
inc dl
|
||||||
|
mov ah, 0x02
|
||||||
|
int 0x10
|
||||||
|
pop bx
|
||||||
|
jmp print_msg
|
||||||
|
4: ret
|
||||||
|
|
||||||
|
/********************************************************************************/
|
||||||
|
/* Data section */
|
||||||
|
/********************************************************************************/
|
||||||
|
err_msg:
|
||||||
|
.string "*** ERROR: THIS MEDIA CANNOT BOOT IN LEGACY MODE ***"
|
||||||
|
|
||||||
|
/********************************************************************************/
|
||||||
|
/* From offset 0x1b8, the MBR contains the partition table and signature data */
|
||||||
|
/********************************************************************************/
|
||||||
|
.org MBR_RESERVED
|
||||||
|
disk_signature:
|
||||||
|
.space 0x04
|
||||||
|
filler:
|
||||||
|
.space 0x02
|
||||||
|
partition_table:
|
||||||
|
.space PT_ENTRY_SIZE * PT_MAX
|
||||||
|
mbr_signature:
|
||||||
|
.word 0xAA55
|
||||||
BIN
res/mbr/msg.bin
Normal file
BIN
res/mbr/msg.bin
Normal file
Binary file not shown.
11
res/mbr/msg.txt
Normal file
11
res/mbr/msg.txt
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
****************************************
|
||||||
|
*** ERROR: LEGACY BOOT OF UEFI MEDIA ***
|
||||||
|
****************************************
|
||||||
|
|
||||||
|
This drive can only boot in UEFI mode.
|
||||||
|
It can not boot in BIOS/Legacy mode.
|
||||||
|
|
||||||
|
If you want to boot this drive in BIOS/Legacy mode, you
|
||||||
|
should recreate it in Rufus using the following settings:
|
||||||
|
* Partition scheme -> MBR
|
||||||
|
* Target system -> BIOS...
|
||||||
|
|
@ -14,11 +14,17 @@ a different ID according to the one found in its partition table entry. Eg. if
|
||||||
the partition table lists the disk ID for the first partition as 0x81, then it
|
the partition table lists the disk ID for the first partition as 0x81, then it
|
||||||
will be swapped for 0x80.
|
will be swapped for 0x80.
|
||||||
|
|
||||||
|
An additional MBR (msg.S) also exists in this directory, that can be used to
|
||||||
|
display an ASCII message contained in the sectors directly following the MBR.
|
||||||
|
This can be used, for instance, to display a notice for media that cannot be
|
||||||
|
booted in BIOS/Legacy mode.
|
||||||
|
|
||||||
# Compilation
|
# Compilation
|
||||||
|
|
||||||
Any gcc suite (except possibly the X-Code one on OS-X) should be able to compile
|
Any gcc suite (except possibly the X-Code one on OS-X) should be able to compile
|
||||||
the MBR by invoking 'make'. A 'make dis', that produces a disassembly dump is
|
the MBR by invoking 'make'. A 'make dis', that produces a disassembly dump is
|
||||||
also provided for your convenience.
|
also provided for your convenience. If you have the Bochs emulator installed,
|
||||||
|
you can also invoke 'make test' to test the MBR with Bochs.
|
||||||
|
|
||||||
# Primer
|
# Primer
|
||||||
|
|
||||||
|
|
|
||||||
10
src/rufus.rc
10
src/rufus.rc
|
|
@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
|
||||||
IDD_DIALOG DIALOGEX 12, 12, 232, 326
|
IDD_DIALOG DIALOGEX 12, 12, 232, 326
|
||||||
STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
|
STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
|
||||||
EXSTYLE WS_EX_ACCEPTFILES
|
EXSTYLE WS_EX_ACCEPTFILES
|
||||||
CAPTION "Rufus 3.9.1617"
|
CAPTION "Rufus 3.9.1618"
|
||||||
FONT 9, "Segoe UI Symbol", 400, 0, 0x0
|
FONT 9, "Segoe UI Symbol", 400, 0, 0x0
|
||||||
BEGIN
|
BEGIN
|
||||||
LTEXT "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
|
LTEXT "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
|
||||||
|
|
@ -394,8 +394,8 @@ END
|
||||||
//
|
//
|
||||||
|
|
||||||
VS_VERSION_INFO VERSIONINFO
|
VS_VERSION_INFO VERSIONINFO
|
||||||
FILEVERSION 3,9,1617,0
|
FILEVERSION 3,9,1618,0
|
||||||
PRODUCTVERSION 3,9,1617,0
|
PRODUCTVERSION 3,9,1618,0
|
||||||
FILEFLAGSMASK 0x3fL
|
FILEFLAGSMASK 0x3fL
|
||||||
#ifdef _DEBUG
|
#ifdef _DEBUG
|
||||||
FILEFLAGS 0x1L
|
FILEFLAGS 0x1L
|
||||||
|
|
@ -413,13 +413,13 @@ BEGIN
|
||||||
VALUE "Comments", "https://rufus.ie"
|
VALUE "Comments", "https://rufus.ie"
|
||||||
VALUE "CompanyName", "Akeo Consulting"
|
VALUE "CompanyName", "Akeo Consulting"
|
||||||
VALUE "FileDescription", "Rufus"
|
VALUE "FileDescription", "Rufus"
|
||||||
VALUE "FileVersion", "3.9.1617"
|
VALUE "FileVersion", "3.9.1618"
|
||||||
VALUE "InternalName", "Rufus"
|
VALUE "InternalName", "Rufus"
|
||||||
VALUE "LegalCopyright", "© 2011-2020 Pete Batard (GPL v3)"
|
VALUE "LegalCopyright", "© 2011-2020 Pete Batard (GPL v3)"
|
||||||
VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
|
VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
|
||||||
VALUE "OriginalFilename", "rufus-3.9.exe"
|
VALUE "OriginalFilename", "rufus-3.9.exe"
|
||||||
VALUE "ProductName", "Rufus"
|
VALUE "ProductName", "Rufus"
|
||||||
VALUE "ProductVersion", "3.9.1617"
|
VALUE "ProductVersion", "3.9.1618"
|
||||||
END
|
END
|
||||||
END
|
END
|
||||||
BLOCK "VarFileInfo"
|
BLOCK "VarFileInfo"
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue