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#!/bin/bash
set -e
if [ -z "${CROSSCC_i686}" ]; then
CROSSCC_i686=i686-elf-gcc
fi
if [ -z "${CROSSAS_i686}" ]; then
CROSSAS_i686=i686-elf-as
fi
if [ -z "${CROSSCC_x8664}" ]; then
CROSSCC_x8664=x86_64-elf-gcc
fi
if [ -z "${CROSSAS_x8664}" ]; then
CROSSAS_x8664=x86_64-elf-as
fi
if [ -z "${CROSSLD_i686}" ]; then
CROSSLD_i686=i686-elf-ld
fi
if [ -z "${CROSSLD_x8664}" ]; then
CROSSLD_x8664=x86_64-elf-ld
fi
if [ -z "${STAGE1_DIR}" ]; then
STAGE1_DIR="./stage1/"
fi
if [ -z "${STAGE2_DIR}" ]; then
STAGE2_DIR="$(pwd)/stage2"
fi
if [ -z "${BUILD_DIR}" ]; then
BUILD_DIR="$(pwd)/build"
fi
mkdir -p "${BUILD_DIR}"
if [ -z "${TARGET}" ]; then
TARGET="$(pwd)/bootloader"
fi
GLOBAL_CFLAGS=(-I./include -ffreestanding -m32 -nostdlib)
LINKER_LD="linker.ld"
# Stage 1
STAGE1_LD="${STAGE1_DIR}/linker.ld"
STAGE1_C_FILES=$(find "${STAGE1_DIR}" -name "*.c")
STAGE1_AS_FILES=$(find "${STAGE1_DIR}" -name "*.S")
STAGE1_AS_TARGET="${BUILD_DIR}/stage1_as.o"
STAGE1_CC_TARGET="${BUILD_DIR}/stage1_cc.o"
STAGE1_TARGET="${BUILD_DIR}/stage1.bin"
# Stage 2
STAGE2_LD="${STAGE1_DIR}/linker.ld"
STAGE2_C_FILES=$(find "${STAGE2_DIR}" -name "*.c")
STAGE2_AS_FILES=$(find "${STAGE2_DIR}" -name "*.S")
STAGE2_AS_TARGET="${BUILD_DIR}/stage2_as.o"
STAGE2_CC_TARGET="${BUILD_DIR}/stage2_cc.o"
STAGE1_DIR="$(pwd)/stage1"
STAGE2_DIR="$(pwd)/stage2"
function usage {
echo -e "Custom build system."
echo -e "Available commands:"
echo -e " ${0} all"
echo -e " ${0} run"
echo -e " ${0} build_drive"
echo -e " ${0} clean"
echo -e " ${0} stage1"
}
function build_lib {
macro="$1"
set -e
local lib_cfiles=$(find "./lib/" -name "*.c")
mkdir -p "${BUILD_DIR}/lib"
for i in ${lib_cfiles[@]}; do
"${CROSSCC_i686}" -m32 -c "$i" "${GLOBAL_CFLAGS[@]}" -o "${BUILD_DIR}/${i}.o" -D${macro}
echo -e " [CC] ${i}"
done
echo "[LIB] Compiled libraries."
}
function stage1 {
set -e
if [[ -e "${BUILD_DIR}/${STAGE1_DIR}" ]] && [[ -f "${BUILD_DIR}/${STAGE1_DIR}" ]]; then
mkdir -p "${BUILD_DIR}/${STAGE1_DIR}"
echo -e "Creating the stage 1 build directory ${BUILD_DIR}/${STAGE1_DIR}"
fi
echo -e "Producing stage 1 binaries..."
if [[ ${#STAGE1_AS_FILES[@]} -gt 0 ]] && [[ -n "${STAGE1_AS_FILES[@]}" ]]; then
echo -e "[STAGE1] Found assembly files: "
for i in ${STAGE1_AS_FILES[@]}; do
mkdir -p "${BUILD_DIR}/${i}"
"${CROSSAS_i686}" "$i" -o "${BUILD_DIR}/${i}.o"
echo -e " [AS]: $i"
done
echo -e " [AS] Assembled stage 1."
else
echo -e "[STAGE1] No assembly files were found."
fi
if [[ ${#STAGE1_C_FILES[@]} -gt 0 ]] && [[ -n "${STAGE1_C_FILES[@]}" ]]; then
echo -e "[STAGE1] Found C files: "
for i in ${STAGE1_C_FILES[@]}; do
"${CROSSCC_i686}" -c "$i" -o "${BUILD_DIR}/${i}.o" "${GLOBAL_CFLAGS[@]}"
echo -e " [CC]: $i"
done
echo -e " [CC] Compiled stage 1."
else
echo -e "[STAGE1] No C files were found."
fi
if [[ ${#STAGE1_C_FILES[@]} -eq 0 ]] && [[ ${#STAGE1_AS_FILES[@]} -eq 0 ]]; then
echo -e "[STAGE1] No stage1 files were found!"
exit 1
fi
echo -e "Stage 1 binaries completed."
}
function stage2 {
if [[ -e "${BUILD_DIR}/${STAGE1_DIR}" ]] && [[ -f "${BUILD_DIR}/${STAGE1_DIR}" ]]; then
mkdir -p "${BUILD_DIR}/${STAGE1_DIR}"
fi
${CROSSAS_i686} "${STAGE2_AS_FILES}" -o "${STAGE2_AS_TARGET}"
echo -e " [AS] Assembled stage 2."
${CROSSCC_x8664} "${STAGE2_C_FILES}" -o "${STAGE2_CC_TARGET}"
echo -e " [CC] Compiled stage 2."
}
function link {
set -e
local linker_files=()
echo -e "[LINK] Linking files..."
for i in $(find "${BUILD_DIR}" -name "*.o"); do
linker_files+=("$i")
echo -e " [L] Added: $i"
done
"${CROSSLD_i686}" -T "${LINKER_LD}" "${linker_files[@]}" -o "${STAGE1_TARGET}"
echo -e "[LINK] Linking complete."
}
function clean {
if [[ -e "${BUILD_DIR}" && -d "${BUILD_DIR}" ]]; then
echo -e "[CLEAN] Deleting build/ directory..."
rm -rf "${BUILD_DIR}"
fi
if [[ -e "$(pwd)/disk.img" && -f "$(pwd)/disk.img" ]]; then
echo -e "[CLEAN] Deleting disk.img..."
rm "$(pwd)/disk.img"
fi
echo -e "[CLEAN] Project cleaned."
}
function build_image {
dd if="${STAGE1_TARGET}" of="$(pwd)/disk.img" bs=512 count=15
}
function run {
qemu-system-x86_64 -drive format=raw,file="$(pwd)/disk.img"
}
function debug {
qemu-system-x86_64 -drive format=raw,file="$(pwd)/disk.img" -S -s
}
function compile {
echo "[COMPILE] Compiling and preparing the entire build."
clean
mkdir -p ./build/
build_lib "STAGE1"
stage1
link
build_image
echo "[COMPILE] DONE"
}
function run {
qemu-system-x86_64 -drive format=raw,file=disk.img
}
case "$1" in
"all") compile ;;
"run") compile && run ;;
"debug") compile && debug ;;
"stage1") stage1 ;;
"build_drive") build_image ;;
"clean") clean ;;
"help"|"usage")
usage
exit 0
;;
"")
echo -e "You must specify a command."
echo -e "Type '${0} usage' or '${0} help' for more information."
exit 1
;;
*)
echo -e "Command not found: '${1}'"
usage
exit 1
;;
esac
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