Add and configure build tools

.gitignore

@@ -50,3 +50,5 @@ modules.order
 Module.symvers
 Mkfile.old
 dkms.conf
+
+*.img

Makefile

@@ -0,0 +1,59 @@
+.RECIPEPREFIX +=
+.POSIX:
+
+BIN = bin
+SRC = src
+CC = gcc
+CFLAGS = -Wextra -fno-builtin -fno-stack-protector -m32 -nostdlib -nostdinc -std=gnu99 -ggdb3
+LINK = ld
+LINKFLAGS = -melf_i386 -Tlink.ld
+CASM = nasm
+ASMFLAGS = -f elf
+GRUB = grub-mkrescue
+GRUBFLAGS = iso
+
+BOOT = iso/boot
+ELF = $(BIN)/main.elf
+IMG = $(BIN)/main.img
+
+OBJS := $(foreach IN_EXT, .c .asm, $(patsubst %$(IN_EXT), %.o, $(wildcard $(SRC)/*$(IN_EXT)))) $(SRC)/boot.o
+
+all: $(IMG)
+
+$(IMG): $(ELF)
+    @echo " GRUB $<"
+    @cp '$<' '$(BOOT)'
+    @$(GRUB) -o '$@' $(GRUBFLAGS)
+
+$(ELF): $(OBJS)
+    @echo " LINK $<"
+    @$(LINK) -o '$(ELF)' $(LINKFLAGS) $^
+
+$(SRC)/%.o: $(SRC)/%.c
+    @mkdir -p $(BIN)
+    @echo "  CC  $<"
+    @$(CC) $(CFLAGS) -o '$@' -c '$<' $(CLIBS)
+
+$(SRC)/%.o: $(SRC)/%.asm
+    @echo " CASM $<"
+    @$(CASM) $(ASMFLAGS) $< -o $@
+
+bochs: $(IMG)
+    CYLINDERS="$$(($$(stat -c '%s' '$<') / 512))" && \
+    bochs -qf /dev/null \
+        'ata0-master: type=disk, path="$<", mode=flat, cylinders='"$$CYLINDERS"', heads=1, spt=1' \
+        'boot: disk' \
+        'display_library: sdl' \
+        'megs: 128'
+
+clean:
+    rm -rf $(BIN) $(SRC)/*.o $(BOOT)/*.elf
+
+debug: $(IMG)
+    qemu-system-i386 -hda '$<' -S -s &
+    @gdb $(ELF) -x gdb.gdb
+
+qemu: $(IMG)
+    qemu-system-i386 -drive file=$<,format=raw
+
+.PHONY: all bochs clean debug qemu

iso/boot/grub/grub.cfg

@@ -0,0 +1,5 @@
+set timeout=0
+set default="0"
+menuentry "main" {
+    multiboot /boot/main.elf
+}

link.ld

@@ -0,0 +1,32 @@
+ENTRY(start)
+SECTIONS
+{
+
+    .mbheader 0x100000 :
+    {
+        *(.mbheader)
+    }
+    .text :
+    {
+        code = .; _code = .; __code = .;
+        *(.text)
+        . = ALIGN(4096);
+    }
+
+    .data :
+    {
+        data = .; _data = .; __data = .;
+        *(.data)
+        *(.rodata)
+        . = ALIGN(4096);
+    }
+
+    .bss :
+    {
+        bss = .; _bss = .; __bss = .;
+        *(.bss)
+        . = ALIGN(4096);
+    }
+
+    end = .; _end = .; __end = .;
+}

src/boot.asm

@@ -0,0 +1,39 @@
+MBOOT_PAGE_ALIGN    equ 1<<0        ; Load kernel and modules on a page boundary
+MBOOT_MEM_INFO      equ 1<<1        ; Provide your kernel with memory info
+MBOOT_HEADER_MAGIC  equ 0x1BADB002  ; Multiboot Magic value
+; NOTE: We do not use MBOOT_AOUT_KLUDGE. It means that GRUB does not
+; pass us a symbol table.
+MBOOT_HEADER_FLAGS  equ MBOOT_PAGE_ALIGN | MBOOT_MEM_INFO
+MBOOT_CHECKSUM      equ -(MBOOT_HEADER_MAGIC + MBOOT_HEADER_FLAGS)
+
+
+[BITS 32]
+
+[GLOBAL mboot]
+[EXTERN code]
+[EXTERN bss]
+[EXTERN end]
+
+section .mbheader
+
+mboot:
+    dd  MBOOT_HEADER_MAGIC
+    dd  MBOOT_HEADER_FLAGS
+    dd  MBOOT_CHECKSUM
+    dd  mboot
+    dd  code
+    dd  bss
+    dd  end
+    dd  start
+
+section .text
+
+[GLOBAL start]
+[EXTERN main]
+
+start:
+    ; Load multiboot information:
+    push    ebx
+    cli
+    call main
+    jmp $

src/main.c

@@ -0,0 +1,5 @@
+struct multiboot;
+
+int main(struct multiboot *mboot_ptr) {
+    return 0xDEADBABA;
+}