blob: f897450a2cb1a1b264f258b3c05aa290ae6f314b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
O := BUILD
all: dump_elf dump_bin
$(O)/boot: $(O)/boot.elf
# MBR 512 bytes (sector 1 - lba 0)
objcopy -O binary $< $@
# Craft 512 bytes (sector 2 - lba 1)
printf "aaaa" >> $@
dd if=/dev/zero bs=1 count=508 >> $@
# Craft 512 bytes (sector 3 - lba 2)
printf "bbbb" >> $@
dd if=/dev/zero bs=1 count=508 >> $@
$(O)/boot.elf: mbr.ld $(O)/mbr.o $(O)/zmbr.o
ld -o $@ -nostdlib -T $^
$(O)/mbr.o: mbr.S | $(O)
gcc -m32 -c -o $@ -ffreestanding mbr.S
$(O)/zmbr.o: zmbr.zig | $(O)
zig build-obj -fno-strip -femit-bin=$@ -target x86-freestanding-none -O ReleaseSmall $<
clean:
$(RM) -r $(O)
$(O):
mkdir -p $(O)
dump_elf: $(O)/boot.elf
@#objdump -Mintel --disassemble=kmain --visualize-jumps=extended-color $<
readelf -W -l $<
size $<
size $< | awk '/$(notdir $<)/ { print "MBR utilization " $$1/512 "%" }'
dump_bin: $(O)/boot
hexdump -C $<
run: $(O)/boot
qemu-system-i386 -hda $< $(QEMU_ARGS)
|
