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add configure script for setting up cross compilation tools

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This commit is contained in:
Borna Šoštarić
2025-12-19 22:47:34 +01:00
parent 940b2810cb
commit 649a227e41
3 changed files with 171 additions and 5 deletions
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13
Makefile
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@@ -1,8 +1,12 @@
MAKEFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
MAKEFILE_DIR := $(dir $(MAKEFILE_PATH))
AS = nasm
ASFLAGS = -f elf32 -g -F dwarf
CC = gcc
LD = ld
CC = $(MAKEFILE_DIR)cross/bin/i386-elf-gcc
LD = $(MAKEFILE_DIR)cross/bin/i386-elf-ld
QEMU= qemu-system-i386
OBJCOPY = $(MAKEFILE_DIR)cross/bin/i386-elf-objcopy
BUILD_DIR = build
DISK_IMG = $(BUILD_DIR)/disk.img
@@ -19,7 +23,7 @@ all: $(DISK_IMG)
stage1: $(BUILD_DIR)
$(AS) $(ASFLAGS) -o $(BUILD_DIR)/$@.o bootloader/$@.asm
$(LD) -Ttext=0x7c00 -melf_i386 -o $(BUILD_DIR)/$@.elf $(BUILD_DIR)/$@.o
objcopy -O binary $(BUILD_DIR)/$@.elf $(BUILD_DIR)/$@.bin
$(OBJCOPY) -O binary $(BUILD_DIR)/$@.elf $(BUILD_DIR)/$@.bin
# NOTE: Stage2 final size should be checked against `$(STAGE2_SIZE)` by the build system to avoid an overflow.
# Alternatively, convey the final stage2 size through other means to stage1.
@@ -27,7 +31,7 @@ stage2: $(BUILD_DIR)
$(AS) $(ASFLAGS) -o $(BUILD_DIR)/stage2.o bootloader/stage2.asm
$(CC) -std=c11 -ffreestanding -nostdlib -fno-stack-protector -m32 -g -c -o $(BUILD_DIR)/stage2_load.o bootloader/stage2_load.c
$(LD) -Tbootloader/stage2.ld -melf_i386 -o $(BUILD_DIR)/$@.elf $(BUILD_DIR)/stage2.o $(BUILD_DIR)/stage2_load.o
objcopy -O binary $(BUILD_DIR)/$@.elf $(BUILD_DIR)/$@.bin
$(OBJCOPY) -O binary $(BUILD_DIR)/$@.elf $(BUILD_DIR)/$@.bin
truncate -s $(STAGE2_SIZE) $(BUILD_DIR)/$@.bin
$(BUILD_DIR)/asm_%.o: kernel/%.asm
@@ -56,3 +60,4 @@ gdb:
clean:
rm -rf $(BUILD_DIR)
rm -rf $(CROSS_DIR)