BAN/include/BAN/ByteSpan.h

@@ -1,121 +0,0 @@
-#pragma once
-
-#include <BAN/Span.h>
-
-namespace BAN
-{
-
-	template<bool CONST>
-	class ByteSpanGeneral
-	{
-	public:
-		using value_type = maybe_const_t<CONST, uint8_t>;
-		using size_type = size_t;
-
-	public:
-		ByteSpanGeneral() = default;
-		ByteSpanGeneral(value_type* data, size_type size)
-			: m_data(data)
-			, m_size(size)
-		{ }
-
-		ByteSpanGeneral(ByteSpanGeneral& other)
-			: m_data(other.data())
-			, m_size(other.size())
-		{ }
-		template<bool C2>
-		ByteSpanGeneral(const ByteSpanGeneral<C2>& other) requires(CONST)
-			: m_data(other.data())
-			, m_size(other.size())
-		{ }
-		ByteSpanGeneral(Span<uint8_t> other)
-			: m_data(other.data())
-			, m_size(other.size())
-		{ }
-		ByteSpanGeneral(const Span<const uint8_t>& other) requires(CONST)
-			: m_data(other.data())
-			, m_size(other.size())
-		{ }
-
-		ByteSpanGeneral& operator=(ByteSpanGeneral other)
-		{
-			m_data = other.data();
-			m_size = other.size();
-			return *this;
-		}
-		template<bool C2>
-		ByteSpanGeneral& operator=(const ByteSpanGeneral<C2>& other) requires(CONST)
-		{
-			m_data = other.data();
-			m_size = other.size();
-			return *this;
-		}
-		ByteSpanGeneral& operator=(Span<uint8_t> other)
-		{
-			m_data = other.data();
-			m_size = other.size();
-			return *this;
-		}
-		ByteSpanGeneral& operator=(const Span<const uint8_t>& other) requires(CONST)
-		{
-			m_data = other.data();
-			m_size = other.size();
-			return *this;
-		}
-
-		template<typename S>
-		requires(CONST || !is_const_v<S>)
-		static ByteSpanGeneral from(S& value)
-		{
-			return ByteSpanGeneral(reinterpret_cast<value_type*>(&value), sizeof(S));
-		}
-
-		template<typename S>
-		requires(!CONST && !is_const_v<S>)
-		S& as()
-		{
-			ASSERT(m_data);
-			ASSERT(m_size >= sizeof(S));
-			return *reinterpret_cast<S*>(m_data);
-		}
-
-		template<typename S>
-		const S& as() const
-		{
-			ASSERT(m_data);
-			ASSERT(m_size >= sizeof(S));
-			return *reinterpret_cast<S*>(m_data);
-		}
-
-		ByteSpanGeneral slice(size_type offset, size_type length)
-		{
-			ASSERT(m_data);
-			ASSERT(m_size >= offset + length);
-			return ByteSpanGeneral(m_data + offset, length);
-		}
-
-		value_type& operator[](size_type offset)
-		{
-			ASSERT(offset < m_size);
-			return m_data[offset];
-		}
-		const value_type& operator[](size_type offset) const
-		{
-			ASSERT(offset < m_size);
-			return m_data[offset];
-		}
-
-		value_type* data() { return m_data; }
-		const value_type* data() const { return m_data; } 
-
-		size_type size() const { return m_size; }
-
-	private:
-		value_type* m_data { nullptr };
-		size_type m_size { 0 };
-	};
-
-	using ByteSpan = ByteSpanGeneral<false>;
-	using ConstByteSpan = ByteSpanGeneral<true>;
-
-}

BAN/include/BAN/Span.h

@@ -43,8 +43,6 @@ namespace BAN
 
 		Span slice(size_type, size_type = ~size_type(0));
 
-		Span<const T> as_const() const { return Span<const T>(m_data, m_size); }
-
 	private:
 		T* m_data = nullptr;
 		size_type m_size = 0;

CMakeLists.txt

@@ -1,13 +1,35 @@
 cmake_minimum_required(VERSION 3.26)
 
-if (NOT ${CMAKE_SYSTEM_NAME} STREQUAL "banan-os")
+if(DEFINED ENV{BANAN_ARCH})
-	message(FATAL_ERROR "CMAKE_SYSTEM_NAME is not banan-os")
+	set(BANAN_ARCH $ENV{BANAN_ARCH})
+else()
+	set(BANAN_ARCH x86_64)
+endif()
+
+set(TOOLCHAIN_PREFIX ${CMAKE_SOURCE_DIR}/toolchain/local)
+
+if(EXISTS ${TOOLCHAIN_PREFIX}/bin/${BANAN_ARCH}-banan_os-g++)
+	set(CMAKE_CXX_STANDARD 20)
+	set(CMAKE_CXX_STANDARD_REQUIRED True)
+	set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}/bin/${BANAN_ARCH}-banan_os-g++)
+	set(CMAKE_CXX_COMPILER_WORKS True)
+
+	set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}/bin/${BANAN_ARCH}-banan_os-gcc)
+	set(CMAKE_C_COMPILER_WORKS True)
+endif()
+
+if(DEFINED QEMU_ACCEL)
+	set(QEMU_ACCEL -accel ${QEMU_ACCEL})
+endif()
+
+if(DEFINED UEFI_BOOT)
+	set(UEFI_BOOT 1)
 endif()
 
 add_compile_options(-mno-sse -mno-sse2)
 add_compile_definitions(__enable_sse=0)
 
-project(banan-os CXX C ASM)
+project(banan-os CXX)
 
 set(BANAN_BASE_SYSROOT ${CMAKE_SOURCE_DIR}/base-sysroot.tar.gz)
 set(BANAN_SYSROOT ${CMAKE_BINARY_DIR}/sysroot)
@@ -15,6 +37,7 @@ set(BANAN_INCLUDE ${BANAN_SYSROOT}/usr/include)
 set(BANAN_LIB ${BANAN_SYSROOT}/usr/lib)
 set(BANAN_BIN ${BANAN_SYSROOT}/usr/bin)
 set(BANAN_BOOT ${BANAN_SYSROOT}/boot)
+set(DISK_IMAGE_PATH ${CMAKE_BINARY_DIR}/banan-os.img)
 
 add_subdirectory(kernel)
 add_subdirectory(BAN)
@@ -35,10 +58,63 @@ add_custom_target(headers
 	DEPENDS libelf-headers
 )
 
-add_custom_target(install-sysroot
+add_custom_target(toolchain
+	COMMAND ${CMAKE_COMMAND} -E env SYSROOT="${BANAN_SYSROOT}" PREFIX="${TOOLCHAIN_PREFIX}" ARCH="${BANAN_ARCH}" ${CMAKE_SOURCE_DIR}/toolchain/build.sh
+	DEPENDS headers
+	USES_TERMINAL
+)
+
+add_custom_target(libstdc++
+	COMMAND ${CMAKE_COMMAND} -E env LIBSTDCPP="1" ${CMAKE_SOURCE_DIR}/toolchain/build.sh
+	DEPENDS libc-install
+	USES_TERMINAL
+)
+
+add_custom_target(image
+	COMMAND ${CMAKE_COMMAND} -E env BANAN_ARCH="${BANAN_ARCH}" SYSROOT="${BANAN_SYSROOT}" DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" TOOLCHAIN="${TOOLCHAIN_PREFIX}" UEFI_BOOT="${UEFI_BOOT}" ${CMAKE_SOURCE_DIR}/image.sh
 	DEPENDS kernel-install
 	DEPENDS ban-install
 	DEPENDS libc-install
 	DEPENDS userspace-install
 	DEPENDS libelf-install
+	USES_TERMINAL
+)
+
+add_custom_target(image-full
+	COMMAND ${CMAKE_COMMAND} -E env BANAN_ARCH="${BANAN_ARCH}" SYSROOT="${BANAN_SYSROOT}" DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" TOOLCHAIN="${TOOLCHAIN_PREFIX}" UEFI_BOOT="${UEFI_BOOT}" ${CMAKE_SOURCE_DIR}/image-full.sh
+	DEPENDS kernel-install
+	DEPENDS ban-install
+	DEPENDS libc-install
+	DEPENDS userspace-install
+	DEPENDS libelf-install
+	USES_TERMINAL
+)
+
+add_custom_target(check-fs
+	COMMAND ${CMAKE_COMMAND} -E env DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" ${CMAKE_SOURCE_DIR}/check-fs.sh
+	USES_TERMINAL
+)
+
+add_custom_target(qemu
+	COMMAND ${CMAKE_COMMAND} -E env BANAN_ARCH="${BANAN_ARCH}" DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" UEFI_BOOT="${UEFI_BOOT}" ${CMAKE_SOURCE_DIR}/qemu.sh -serial stdio ${QEMU_ACCEL}
+	DEPENDS image
+	USES_TERMINAL
+)
+
+add_custom_target(qemu-nographic
+	COMMAND ${CMAKE_COMMAND} -E env BANAN_ARCH="${BANAN_ARCH}" DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" UEFI_BOOT="${UEFI_BOOT}" ${CMAKE_SOURCE_DIR}/qemu.sh -nographic ${QEMU_ACCEL}
+	DEPENDS image
+	USES_TERMINAL
+)
+
+add_custom_target(qemu-debug
+	COMMAND ${CMAKE_COMMAND} -E env BANAN_ARCH="${BANAN_ARCH}" DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" UEFI_BOOT="${UEFI_BOOT}" ${CMAKE_SOURCE_DIR}/qemu.sh -serial stdio -d int -no-reboot
+	DEPENDS image
+	USES_TERMINAL
+)
+
+add_custom_target(bochs
+	COMMAND ${CMAKE_COMMAND} -E env DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" ${CMAKE_SOURCE_DIR}/bochs.sh
+	DEPENDS image
+	USES_TERMINAL
 )

LibELF/LibELF/LoadableELF.cpp

@@ -62,7 +62,7 @@ namespace LibELF
 			return BAN::Error::from_errno(ENOEXEC);
 		}
 
-		size_t nread = TRY(m_inode->read(0, BAN::ByteSpan::from(m_file_header)));
+		size_t nread = TRY(m_inode->read(0, &m_file_header, sizeof(m_file_header)));
 		ASSERT(nread == sizeof(m_file_header));
 
 		if (m_file_header.e_ident[EI_MAG0] != ELFMAG0 || 
@@ -113,7 +113,7 @@ namespace LibELF
 		TRY(m_program_headers.resize(m_file_header.e_phnum));
 		for (size_t i = 0; i < m_file_header.e_phnum; i++)
 		{
-			TRY(m_inode->read(m_file_header.e_phoff + m_file_header.e_phentsize * i, BAN::ByteSpan::from(m_program_headers[i])));
+			TRY(m_inode->read(m_file_header.e_phoff + m_file_header.e_phentsize * i, &m_program_headers[i], m_file_header.e_phentsize));
 
 			const auto& pheader = m_program_headers[i];
 			if (pheader.p_type != PT_NULL && pheader.p_type != PT_LOAD)
@@ -242,7 +242,7 @@ namespace LibELF
 							file_offset = vaddr - program_header.p_vaddr;
 
 						size_t bytes = BAN::Math::min<size_t>(PAGE_SIZE - vaddr_offset, program_header.p_filesz - file_offset);
-						TRY(m_inode->read(program_header.p_offset + file_offset, { (uint8_t*)vaddr + vaddr_offset, bytes }));
+						TRY(m_inode->read(program_header.p_offset + file_offset, (void*)(vaddr + vaddr_offset), bytes));
 					}
 
 					return {};

PreLoad.cmake

@@ -0,0 +1 @@
+set(CMAKE_GENERATOR "Ninja" CACHE INTERNAL "" FORCE)

README.md

@@ -2,7 +2,7 @@
 
 # banan-os
 
-This is my hobby operating system written in C++. Currently supports only x86_64 architecture. We have a read-only ext2 filesystem, read-write ramfs, IDE disk drivers in ATA PIO mode, ATA AHCI drivers, userspace processes, executable loading from ELF format, linear VBE graphics and multithreaded processing on single core.
+This is my hobby operating system written in C++. Currently supports only x86_64 architecture. We have a read-only ext2 filesystem, read-write ramfs, IDE disk drivers in ATA PIO mode, userspace processes, executable loading from ELF format, linear VBE graphics and multithreaded processing on single core.
 
 ![screenshot from qemu running banan-os](assets/banan-os.png)
 
@@ -14,32 +14,41 @@ Each major component and library has its own subdirectory (kernel, userspace, li
 
 There does not exist a complete list of needed packages for building. From the top of my head I can say that *cmake*, *ninja*, *make*, *grub*, *rsync* and emulator (*qemu* or *bochs*) are needed.
 
+You can and *should* pass cmake variable QEMU_ACCEL set to proper accelerator to cmake commands. For example on Linux this means adding -DQEMU_ACCEL=kvm to the end of all cmake commands. 
+
+Create the build directory and cofigure cmake
+```sh
+mkdir build
+cd build
+cmake ..
+```
+
 To build the toolchain for this os. You can run the following command.
 > ***NOTE:*** The following step has to be done only once. This might take a long time since we are compiling binutils and gcc.
 ```sh
-./script/build.sh toolchain
+ninja toolchain
+cmake --fresh .. # We need to reconfigure cmake to use the new compiler
+ninja libstdc++
 ```
 
-To build the os itself you can run one of the following commands. You will need root access since the sysroot has "proper" permissions.
+To build the os itself you can run either of the following commands. You will need root access since the sysroot has "proper" permissions.
 ```sh
-./script/build.sh qemu
+ninja qemu
-./script/build.sh qemu-nographic
+ninja bochs
-./script/build.sh qemu-debug
-./script/build.sh bochs
 ```
 
 You can also build the kernel or disk image without running it:
 ```sh
-./script/build.sh kernel
+ninja kernel
-./script/build.sh image
+ninja image
 ```
 
-If you have corrupted your disk image or want to create new one, you can either manually delete *build/banan-os.img* and build system will automatically create you a new one or you can run the following command.
+If you have corrupted your disk image or want to create new one, you can either manually delete *banan-os.img* and cmake will automatically create you a new one or you can run the following command.
 ```sh
-./script/build.sh image-full
+ninja image-full
 ```
 
-> ***NOTE*** ```ninja clean``` has to be ran with root permissions, since it deletes from the banan-so sysroot.
+> ***NOTE*** ```ninja clean``` has to be ran with root permissions, since it deletes the root filesystem.
 
 ### Contributing
 

bochs.sh

@@ -14,7 +14,7 @@ COM1_DEVICE=$(cat $COM1_DEVICE_FILE)
 rm $COM1_DEVICE_FILE
 
 cat > $BOCHS_CONFIG_FILE << EOF
-ata0-master: type=disk, path=$BANAN_DISK_IMAGE_PATH, status=inserted
+ata0-master: type=disk, path=$DISK_IMAGE_PATH, status=inserted
 boot: disk
 clock: sync=realtime, time0=local
 display_library: x, options="gui_debug"

check-fs.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+LOOP_DEV=$(sudo losetup -f --show $DISK_IMAGE_PATH)
+sudo partprobe $LOOP_DEV
+
+sudo fsck.ext2 -fn ${LOOP_DEV}p2 || true
+
+sudo losetup -d $LOOP_DEV

image-full.sh

@@ -1,34 +1,14 @@
 #!/bin/bash
 set -e
 
-if [[ -z $BANAN_DISK_IMAGE_PATH ]]; then
-	echo  "You must set the BANAN_DISK_IMAGE_PATH environment variable" >&2
-	exit 1
-fi
-
-if [[ -z $BANAN_SYSROOT ]]; then
-	echo  "You must set the BANAN_SYSROOT environment variable" >&2
-	exit 1
-fi
-
-if [[ -z $BANAN_TOOLCHAIN_PREFIX ]]; then
-	echo  "You must set the BANAN_TOOLCHAIN_PREFIX environment variable" >&2
-	exit 1
-fi
-
-if [[ -z $BANAN_ARCH ]]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
-
 DISK_SIZE=$[50 * 1024 * 1024]
 MOUNT_DIR=/mnt
 
-truncate -s 0 "$BANAN_DISK_IMAGE_PATH"
+truncate -s 0 "$DISK_IMAGE_PATH"
-truncate -s $DISK_SIZE "$BANAN_DISK_IMAGE_PATH"
+truncate -s $DISK_SIZE "$DISK_IMAGE_PATH"
 
-if [ "$BANAN_UEFI_BOOT" == "1" ]; then
+if [ "$UEFI_BOOT" == "1" ]; then
-	sed -e 's/\s*\([-\+[:alnum:]]*\).*/\1/' << EOF | fdisk "$BANAN_DISK_IMAGE_PATH" > /dev/null
+	sed -e 's/\s*\([-\+[:alnum:]]*\).*/\1/' << EOF | fdisk "$DISK_IMAGE_PATH" > /dev/null
 	  g     # gpt
 	  n     # new partition
 	  1     # partition number 1
@@ -47,7 +27,7 @@ if [ "$BANAN_UEFI_BOOT" == "1" ]; then
 	  w     # write changes
 EOF
 else
-	sed -e 's/\s*\([-\+[:alnum:]]*\).*/\1/' << EOF | fdisk "$BANAN_DISK_IMAGE_PATH" > /dev/null
+	sed -e 's/\s*\([-\+[:alnum:]]*\).*/\1/' << EOF | fdisk "$DISK_IMAGE_PATH" > /dev/null
 	  g     # gpt
 	  n     # new partition
 	  1     # partition number 1
@@ -67,30 +47,30 @@ else
 EOF
 fi
 
-LOOP_DEV=$(sudo losetup -f --show "$BANAN_DISK_IMAGE_PATH")
+LOOP_DEV=$(sudo losetup -f --show "$DISK_IMAGE_PATH")
 sudo partprobe $LOOP_DEV
 
 PARTITION1=${LOOP_DEV}p1
 PARTITION2=${LOOP_DEV}p2
 
-sudo mkfs.ext2 -d $BANAN_SYSROOT -b 1024 -q $PARTITION2
+sudo mkfs.ext2 -d $SYSROOT -b 1024 -q $PARTITION2
 
-if [[ "$BANAN_UEFI_BOOT" == "1" ]]; then
+if [[ "$UEFI_BOOT" == "1" ]]; then
 	sudo mkfs.fat $PARTITION1 > /dev/null
 	sudo mount $PARTITION1 "$MOUNT_DIR"
 	sudo mkdir -p "$MOUNT_DIR/EFI/BOOT"
-	sudo "$BANAN_TOOLCHAIN_PREFIX/bin/grub-mkstandalone" -O "$BANAN_ARCH-efi" -o "$MOUNT_DIR/EFI/BOOT/BOOTX64.EFI" "boot/grub/grub.cfg=$BANAN_TOOLCHAIN_PREFIX/grub-memdisk.cfg"
+	sudo "$TOOLCHAIN/bin/grub-mkstandalone" -O "$BANAN_ARCH-efi" -o "$MOUNT_DIR/EFI/BOOT/BOOTX64.EFI" "boot/grub/grub.cfg=$TOOLCHAIN/grub-memdisk.cfg"
 	sudo umount "$MOUNT_DIR"
 
 	sudo mount $PARTITION2 "$MOUNT_DIR"
 	sudo mkdir -p "$MOUNT_DIR/boot/grub"
-	sudo cp "$BANAN_TOOLCHAIN_PREFIX/grub-uefi.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
+	sudo cp "$TOOLCHAIN/grub-uefi.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
 	sudo umount "$MOUNT_DIR"
 else
 	sudo mount $PARTITION2 "$MOUNT_DIR"
 	sudo grub-install --no-floppy --target=i386-pc --modules="normal ext2 multiboot" --boot-directory="$MOUNT_DIR/boot" $LOOP_DEV
 	sudo mkdir -p "$MOUNT_DIR/boot/grub"
-	sudo cp "$BANAN_TOOLCHAIN_PREFIX/grub-legacy-boot.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
+	sudo cp "$TOOLCHAIN/grub-legacy-boot.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
 	sudo umount "$MOUNT_DIR"
 fi
 

image.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+if [ ! -f $DISK_IMAGE_PATH ]; then
+	$(dirname "$0")/image-full.sh
+	exit 0
+fi
+
+fdisk -l $DISK_IMAGE_PATH | grep -q 'EFI System'; IMAGE_IS_UEFI=$?
+[[ $UEFI_BOOT == 1 ]]; CREATE_IS_UEFI=$?
+
+if [ $IMAGE_IS_UEFI -ne $CREATE_IS_UEFI ]; then
+	echo Converting disk image to/from UEFI
+	$(dirname "$0")/image-full.sh
+	exit 0
+fi
+
+MOUNT_DIR=/mnt
+
+LOOP_DEV=$(sudo losetup -f --show $DISK_IMAGE_PATH)
+sudo partprobe $LOOP_DEV
+
+ROOT_PARTITON=${LOOP_DEV}p2
+
+sudo mount $ROOT_PARTITON $MOUNT_DIR
+
+sudo rsync -a ${SYSROOT}/* ${MOUNT_DIR}/
+
+sudo umount $MOUNT_DIR
+
+sudo losetup -d $LOOP_DEV

kernel/include/kernel/Device/NullDevice.h

@@ -20,8 +20,8 @@ namespace Kernel
 			, m_rdev(rdev)
 		{ }
 
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override { return 0; }
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override { return 0; }
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan buffer) override { return buffer.size(); };
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t size) override { return size; };
 
 	private:
 		const dev_t m_rdev;

kernel/include/kernel/Device/ZeroDevice.h

@@ -18,8 +18,8 @@ namespace Kernel
 			, m_rdev(rdev)
 		{ }
 
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan buffer) override { return buffer.size(); };
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t size) override { return size; };
 
 	private:
 		const dev_t m_rdev;

kernel/include/kernel/FS/Ext2/FileSystem.h

@@ -33,9 +33,6 @@ namespace Kernel
 			uint8_t* data() { return m_buffer.data(); }
 			const uint8_t* data() const { return m_buffer.data(); }
 
-			BAN::ByteSpan span() { return m_buffer; }
-			BAN::ConstByteSpan span() const { return m_buffer.as_const(); }
-
 			uint8_t& operator[](size_t index) { return m_buffer[index]; }
 			uint8_t operator[](size_t index) const { return m_buffer[index]; }
 

kernel/include/kernel/FS/Ext2/Inode.h

@@ -34,8 +34,8 @@ namespace Kernel
 		
 		virtual BAN::ErrorOr<BAN::String> link_target_impl() override;
 
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t) override;
 		virtual BAN::ErrorOr<void> truncate_impl(size_t) override;
 
 	private:

kernel/include/kernel/FS/Inode.h

@@ -1,11 +1,10 @@
 #pragma once
 
-#include <BAN/ByteSpan.h>
 #include <BAN/RefPtr.h>
 #include <BAN/String.h>
 #include <BAN/StringView.h>
-#include <BAN/Vector.h>
 #include <BAN/WeakPtr.h>
+#include <BAN/Vector.h>
 
 #include <kernel/API/DirectoryEntry.h>
 #include <kernel/Credentials.h>
@@ -96,8 +95,8 @@ namespace Kernel
 		BAN::ErrorOr<BAN::String> link_target();
 
 		// General API
-		BAN::ErrorOr<size_t> read(off_t, BAN::ByteSpan buffer);
+		BAN::ErrorOr<size_t> read(off_t, void*, size_t);
-		BAN::ErrorOr<size_t> write(off_t, BAN::ConstByteSpan buffer);
+		BAN::ErrorOr<size_t> write(off_t, const void*, size_t);
 		BAN::ErrorOr<void> truncate(size_t);
 		bool has_data() const;
 
@@ -112,8 +111,8 @@ namespace Kernel
 		virtual BAN::ErrorOr<BAN::String> link_target_impl()				{ return BAN::Error::from_errno(ENOTSUP); }
 
 		// General API
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan)		{ return BAN::Error::from_errno(ENOTSUP); }
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t)		{ return BAN::Error::from_errno(ENOTSUP); }
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan)	{ return BAN::Error::from_errno(ENOTSUP); }
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t)	{ return BAN::Error::from_errno(ENOTSUP); }
 		virtual BAN::ErrorOr<void> truncate_impl(size_t)					{ return BAN::Error::from_errno(ENOTSUP); }
 		virtual bool has_data_impl() const { dwarnln("nonblock not supported"); return true; }
 

kernel/include/kernel/FS/Pipe.h

@@ -31,8 +31,8 @@ namespace Kernel
 		virtual dev_t rdev() const override { return 0; } // FIXME
 
 	protected:
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t) override;
 
 	private:
 		Pipe(const Credentials&);

kernel/include/kernel/FS/ProcFS/Inode.h

@@ -23,23 +23,23 @@ namespace Kernel
 	class ProcROInode final : public RamInode
 	{
 	public:
-		static BAN::ErrorOr<BAN::RefPtr<ProcROInode>> create(Process&, size_t (Process::*callback)(off_t, BAN::ByteSpan) const, RamFileSystem&, mode_t, uid_t, gid_t);
+		static BAN::ErrorOr<BAN::RefPtr<ProcROInode>> create(Process&, size_t (Process::*callback)(off_t, void*, size_t) const, RamFileSystem&, mode_t, uid_t, gid_t);
 		~ProcROInode() = default;
 
 	protected:
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
 
 		// You may not write here and this is always non blocking
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan)	override	{ return BAN::Error::from_errno(EINVAL); }
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t)	override	{ return BAN::Error::from_errno(EINVAL); }
 		virtual BAN::ErrorOr<void> truncate_impl(size_t) override						{ return BAN::Error::from_errno(EINVAL); }
 		virtual bool has_data_impl() const override										{ return true; }
 
 	private:
-		ProcROInode(Process&, size_t (Process::*)(off_t, BAN::ByteSpan) const, RamFileSystem&, const FullInodeInfo&);
+		ProcROInode(Process&, size_t (Process::*)(off_t, void*, size_t) const, RamFileSystem&, const FullInodeInfo&);
 	
 	private:
 		Process& m_process;
-		size_t (Process::*m_callback)(off_t, BAN::ByteSpan) const;
+		size_t (Process::*m_callback)(off_t, void*, size_t) const;
 	};
 
 }

kernel/include/kernel/FS/RamFS/Inode.h

@@ -70,8 +70,8 @@ namespace Kernel
 	protected:
 		RamFileInode(RamFileSystem&, const FullInodeInfo&);
 
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t) override;
 		virtual BAN::ErrorOr<void> truncate_impl(size_t) override;
 
 	private:

kernel/include/kernel/Input/PS2Keyboard.h

@@ -63,7 +63,7 @@ namespace Kernel::Input
 		virtual dev_t rdev() const override { return m_rdev; }
 
 	protected:
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
 
 	private:
 		const dev_t m_rdev;

kernel/include/kernel/OpenFileDescriptorSet.h

@@ -41,8 +41,8 @@ namespace Kernel
 		void close_all();
 		void close_cloexec();
 
-		BAN::ErrorOr<size_t> read(int fd, BAN::ByteSpan);
+		BAN::ErrorOr<size_t> read(int fd, void* buffer, size_t count);
-		BAN::ErrorOr<size_t> write(int fd, BAN::ConstByteSpan);
+		BAN::ErrorOr<size_t> write(int fd, const void* buffer, size_t count);
 
 		BAN::ErrorOr<void> read_dir_entries(int fd, DirectoryEntryList* list, size_t list_size);
 

kernel/include/kernel/Process.h

@@ -139,9 +139,9 @@ namespace Kernel
 
 		PageTable& page_table() { return m_page_table ? *m_page_table : PageTable::kernel(); }
 
-		size_t proc_meminfo(off_t offset, BAN::ByteSpan) const;
+		size_t proc_meminfo(off_t offset, void* buffer, size_t buffer_size) const;
-		size_t proc_cmdline(off_t offset, BAN::ByteSpan) const;
+		size_t proc_cmdline(off_t offset, void* buffer, size_t buffer_size) const;
-		size_t proc_environ(off_t offset, BAN::ByteSpan) const;
+		size_t proc_environ(off_t offset, void* buffer, size_t buffer_size) const;
 
 		bool is_userspace() const { return m_is_userspace; }
 		const userspace_info_t& userspace_info() const { return m_userspace_info; }

kernel/include/kernel/Storage/ATA/AHCI/Device.h

@@ -23,15 +23,14 @@ namespace Kernel
 		BAN::ErrorOr<void> rebase();
 		BAN::ErrorOr<void> read_identify_data();
 
-		virtual BAN::ErrorOr<void> read_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<void> read_sectors_impl(uint64_t lba, uint64_t sector_count, uint8_t* buffer) override;
-		virtual BAN::ErrorOr<void> write_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan) override;
+		virtual BAN::ErrorOr<void> write_sectors_impl(uint64_t lba, uint64_t sector_count, const uint8_t* buffer) override;
 		BAN::ErrorOr<void> send_command_and_block(uint64_t lba, uint64_t sector_count, Command command);
 
 		BAN::Optional<uint32_t> find_free_command_slot();
 
 		void handle_irq();
-		
+		void block_until_irq();
-		BAN::ErrorOr<void> block_until_command_completed(uint32_t command_slot);
 
 	private:
 		BAN::RefPtr<AHCIController> m_controller;
@@ -42,6 +41,8 @@ namespace Kernel
 		// TODO: can we read straight to user buffer?
 		BAN::UniqPtr<DMARegion> m_data_dma_region;
 
+		volatile bool m_has_got_irq { false };
+
 		friend class AHCIController;
 	};
 

kernel/include/kernel/Storage/ATA/ATABus.h

@@ -1,6 +1,5 @@
 #pragma once
 
-#include <BAN/ByteSpan.h>
 #include <BAN/RefPtr.h>
 #include <BAN/Vector.h>
 #include <kernel/InterruptController.h>
@@ -23,8 +22,8 @@ namespace Kernel
 	public:
 		static BAN::ErrorOr<BAN::RefPtr<ATABus>> create(uint16_t base, uint16_t ctrl, uint8_t irq);
 
-		BAN::ErrorOr<void> read(ATADevice&, uint64_t lba, uint64_t sector_count, BAN::ByteSpan);
+		BAN::ErrorOr<void> read(ATADevice&, uint64_t, uint8_t, uint8_t*);
-		BAN::ErrorOr<void> write(ATADevice&, uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan);
+		BAN::ErrorOr<void> write(ATADevice&, uint64_t, uint8_t, const uint8_t*);
 
 		virtual void handle_irq() override;
 

kernel/include/kernel/Storage/ATA/ATADevice.h

@@ -32,8 +32,8 @@ namespace Kernel
 
 			virtual dev_t rdev() const override { return m_rdev; }
 
-			virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+			virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
-			virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
+			virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t) override;
 
 		protected:
 			ATABaseDevice();
@@ -63,8 +63,8 @@ namespace Kernel
 	private:
 		ATADevice(BAN::RefPtr<ATABus>, ATABus::DeviceType, bool is_secodary);
 		
-		virtual BAN::ErrorOr<void> read_sectors_impl(uint64_t, uint64_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<void> read_sectors_impl(uint64_t, uint64_t, uint8_t*) override;
-		virtual BAN::ErrorOr<void> write_sectors_impl(uint64_t, uint64_t, BAN::ConstByteSpan) override;
+		virtual BAN::ErrorOr<void> write_sectors_impl(uint64_t, uint64_t, const uint8_t*) override;
 
 	private:
 		BAN::RefPtr<ATABus> m_bus;

kernel/include/kernel/Storage/DiskCache.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <BAN/Array.h>
-#include <BAN/ByteSpan.h>
 #include <kernel/Memory/Types.h>
 #include <kernel/SpinLock.h>
 
@@ -16,8 +15,8 @@ namespace Kernel
 		DiskCache(size_t sector_size, StorageDevice&);
 		~DiskCache();
 
-		bool read_from_cache(uint64_t sector, BAN::ByteSpan);
+		bool read_from_cache(uint64_t sector, uint8_t* buffer);
-		BAN::ErrorOr<void> write_to_cache(uint64_t sector, BAN::ConstByteSpan, bool dirty);
+		BAN::ErrorOr<void> write_to_cache(uint64_t sector, const uint8_t* buffer, bool dirty);
 
 		BAN::ErrorOr<void> sync();
 		size_t release_clean_pages(size_t);

kernel/include/kernel/Storage/StorageDevice.h

@@ -30,8 +30,8 @@ namespace Kernel
 		const char* label() const { return m_label; }
 		const StorageDevice& device() const { return m_device; }
 
-		BAN::ErrorOr<void> read_sectors(uint64_t lba, uint8_t sector_count, BAN::ByteSpan);
+		BAN::ErrorOr<void> read_sectors(uint64_t lba, uint8_t sector_count, uint8_t* buffer);
-		BAN::ErrorOr<void> write_sectors(uint64_t lba, uint8_t sector_count, BAN::ConstByteSpan);
+		BAN::ErrorOr<void> write_sectors(uint64_t lba, uint8_t sector_count, const uint8_t* buffer);
 		
 		virtual BAN::StringView name() const override { return m_name; }
 
@@ -57,7 +57,7 @@ namespace Kernel
 		virtual dev_t rdev() const override { return m_rdev; }
 
 	protected:
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
 
 	private:
 		const dev_t m_rdev;
@@ -73,8 +73,8 @@ namespace Kernel
 
 		BAN::ErrorOr<void> initialize_partitions();
 
-		BAN::ErrorOr<void> read_sectors(uint64_t lba, uint64_t sector_count, BAN::ByteSpan);
+		BAN::ErrorOr<void> read_sectors(uint64_t lba, uint64_t sector_count, uint8_t* buffer);
-		BAN::ErrorOr<void> write_sectors(uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan);
+		BAN::ErrorOr<void> write_sectors(uint64_t lba, uint64_t sector_count, const uint8_t* buffer);
 
 		virtual uint32_t sector_size() const = 0;
 		virtual uint64_t total_size() const = 0;
@@ -86,8 +86,8 @@ namespace Kernel
 		virtual bool is_storage_device() const override { return true; }
 
 	protected:
-		virtual BAN::ErrorOr<void> read_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ByteSpan) = 0;
+		virtual BAN::ErrorOr<void> read_sectors_impl(uint64_t lba, uint64_t sector_count, uint8_t* buffer) = 0;
-		virtual BAN::ErrorOr<void> write_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan) = 0;
+		virtual BAN::ErrorOr<void> write_sectors_impl(uint64_t lba, uint64_t sector_count, const uint8_t* buffer) = 0;
 		void add_disk_cache();
 
 	private:

kernel/include/kernel/Terminal/TTY.h

@@ -49,8 +49,8 @@ namespace Kernel
 		{ }
 
 		virtual void putchar_impl(uint8_t ch) = 0;
-		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, void*, size_t) override;
-		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, const void*, size_t) override;
 
 	private:
 		void do_backspace();

kernel/kernel/Device/ZeroDevice.cpp

@@ -12,10 +12,10 @@ namespace Kernel
 		return BAN::RefPtr<ZeroDevice>::adopt(result);
 	}
 
-	BAN::ErrorOr<size_t> ZeroDevice::read_impl(off_t, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> ZeroDevice::read_impl(off_t, void* buffer, size_t bytes)
 	{
-		memset(buffer.data(), 0, buffer.size());
+		memset(buffer, 0, bytes);
-		return buffer.size();
+		return bytes;
 	}
 
 }

kernel/kernel/FS/Ext2/FileSystem.cpp

@@ -33,7 +33,7 @@ namespace Kernel
 			BAN::Vector<uint8_t> superblock_buffer;
 			TRY(superblock_buffer.resize(sector_count * sector_size));
 
-			TRY(m_partition.read_sectors(lba, sector_count, superblock_buffer.span()));
+			TRY(m_partition.read_sectors(lba, sector_count, superblock_buffer.data()));
 
 			memcpy(&m_superblock, superblock_buffer.data(), sizeof(Ext2::Superblock));
 		}
@@ -223,7 +223,7 @@ namespace Kernel
 
 		ASSERT(block >= 2);
 		ASSERT(buffer.size() >= block_size);
-		MUST(m_partition.read_sectors(sectors_before + (block - 2) * sectors_per_block, sectors_per_block, buffer.span()));
+		MUST(m_partition.read_sectors(sectors_before + (block - 2) * sectors_per_block, sectors_per_block, buffer.data()));
 	}
 
 	void Ext2FS::write_block(uint32_t block, const BlockBufferWrapper& buffer)
@@ -237,7 +237,7 @@ namespace Kernel
 
 		ASSERT(block >= 2);
 		ASSERT(buffer.size() >= block_size);
-		MUST(m_partition.write_sectors(sectors_before + (block - 2) * sectors_per_block, sectors_per_block, buffer.span()));
+		MUST(m_partition.write_sectors(sectors_before + (block - 2) * sectors_per_block, sectors_per_block, buffer.data()));
 	}
 
 	void Ext2FS::sync_superblock()
@@ -258,11 +258,11 @@ namespace Kernel
 		BAN::Vector<uint8_t> superblock_buffer;
 		MUST(superblock_buffer.resize(sector_count * sector_size));
 
-		MUST(m_partition.read_sectors(lba, sector_count, superblock_buffer.span()));
+		MUST(m_partition.read_sectors(lba, sector_count, superblock_buffer.data()));
 		if (memcmp(superblock_buffer.data(), &m_superblock, superblock_bytes))
 		{
 			memcpy(superblock_buffer.data(), &m_superblock, superblock_bytes);
-			MUST(m_partition.write_sectors(lba, sector_count, superblock_buffer.span()));
+			MUST(m_partition.write_sectors(lba, sector_count, superblock_buffer.data()));
 		}
 	}
 

kernel/kernel/FS/Ext2/Inode.cpp

@@ -100,21 +100,19 @@ namespace Kernel
 		return BAN::Error::from_errno(ENOTSUP);
 	}
 
-	BAN::ErrorOr<size_t> Ext2Inode::read_impl(off_t offset, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> Ext2Inode::read_impl(off_t offset, void* buffer, size_t count)
 	{
 		// FIXME: update atime if needed
 
 		ASSERT(!mode().ifdir());
 		ASSERT(offset >= 0);
 
-		if (offset >= UINT32_MAX || buffer.size() >= UINT32_MAX || buffer.size() >= (size_t)(UINT32_MAX - offset))
+		if (offset >= UINT32_MAX || count >= UINT32_MAX || offset + count >= UINT32_MAX)
 			return BAN::Error::from_errno(EOVERFLOW);
 
 		if (offset >= m_inode.size)
 			return 0;
-		
+		if (offset + count > m_inode.size)
-		uint32_t count = buffer.size();
-		if (offset + buffer.size() > m_inode.size)
 			count = m_inode.size - offset;
 
 		const uint32_t block_size = blksize();
@@ -133,7 +131,7 @@ namespace Kernel
 
 			uint32_t copy_offset = (offset + n_read) % block_size;
 			uint32_t to_copy = BAN::Math::min<uint32_t>(block_size - copy_offset, count - n_read);
-			memcpy(buffer.data() + n_read, block_buffer.data() + copy_offset, to_copy);
+			memcpy((uint8_t*)buffer + n_read, block_buffer.data() + copy_offset, to_copy);
 
 			n_read += to_copy;
 		}
@@ -141,25 +139,26 @@ namespace Kernel
 		return n_read;
 	}
 
-	BAN::ErrorOr<size_t> Ext2Inode::write_impl(off_t offset, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> Ext2Inode::write_impl(off_t offset, const void* buffer, size_t count)
 	{
 		// FIXME: update atime if needed
 
 		ASSERT(!mode().ifdir());
 		ASSERT(offset >= 0);
 
-		if (offset >= UINT32_MAX || buffer.size() >= UINT32_MAX || buffer.size() >= (size_t)(UINT32_MAX - offset))
+		if (offset >= UINT32_MAX || count >= UINT32_MAX || offset + count >= UINT32_MAX)
 			return BAN::Error::from_errno(EOVERFLOW);
 
-		if (m_inode.size < offset + buffer.size())
+		if (m_inode.size < offset + count)
-			TRY(truncate_impl(offset + buffer.size()));
+			TRY(truncate_impl(offset + count));
 
 		const uint32_t block_size = blksize();
 
 		auto block_buffer = m_fs.get_block_buffer();
 
-		size_t written = 0;
+		const uint8_t* u8buffer = (const uint8_t*)buffer;
-		size_t to_write = buffer.size();
+
+		size_t to_write = count;
 
 		// Write partial block
 		if (offset % block_size)
@@ -170,10 +169,10 @@ namespace Kernel
 			uint32_t to_copy = BAN::Math::min<uint32_t>(block_size - block_offset, to_write);
 
 			m_fs.read_block(block_index, block_buffer);
-			memcpy(block_buffer.data() + block_offset, buffer.data(), to_copy);
+			memcpy(block_buffer.data() + block_offset, u8buffer, to_copy);
 			m_fs.write_block(block_index, block_buffer);
 
-			written += to_copy;
+			u8buffer += to_copy;
 			offset += to_copy;
 			to_write -= to_copy;
 		}
@@ -182,10 +181,10 @@ namespace Kernel
 		{
 			uint32_t block_index = fs_block_of_data_block_index(offset / block_size);
 
-			memcpy(block_buffer.data(), buffer.data() + written, block_buffer.size());
+			memcpy(block_buffer.data(), u8buffer, block_buffer.size());
 			m_fs.write_block(block_index, block_buffer);
 
-			written += block_size;
+			u8buffer += block_size;
 			offset += block_size;
 			to_write -= block_size;
 		}
@@ -195,11 +194,11 @@ namespace Kernel
 			uint32_t block_index = fs_block_of_data_block_index(offset / block_size);
 
 			m_fs.read_block(block_index, block_buffer);
-			memcpy(block_buffer.data(), buffer.data() + written, to_write);
+			memcpy(block_buffer.data(), u8buffer, to_write);
 			m_fs.write_block(block_index, block_buffer);
 		}
 
-		return buffer.size();
+		return count;
 	}
 
 	BAN::ErrorOr<void> Ext2Inode::truncate_impl(size_t new_size)

kernel/kernel/FS/Inode.cpp

@@ -102,22 +102,22 @@ namespace Kernel
 		return link_target_impl();
 	}
 
-	BAN::ErrorOr<size_t> Inode::read(off_t offset, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> Inode::read(off_t offset, void* buffer, size_t bytes)
 	{
 		LockGuard _(m_lock);
 		Thread::TerminateBlocker blocker(Thread::current());
 		if (mode().ifdir())
 			return BAN::Error::from_errno(EISDIR);
-		return read_impl(offset, buffer);
+		return read_impl(offset, buffer, bytes);
 	}
 
-	BAN::ErrorOr<size_t> Inode::write(off_t offset, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> Inode::write(off_t offset, const void* buffer, size_t bytes)
 	{
 		LockGuard _(m_lock);
 		Thread::TerminateBlocker blocker(Thread::current());
 		if (mode().ifdir())
 			return BAN::Error::from_errno(EISDIR);
-		return write_impl(offset, buffer);
+		return write_impl(offset, buffer, bytes);
 	}
 
 	BAN::ErrorOr<void> Inode::truncate(size_t size)

kernel/kernel/FS/Pipe.cpp

@@ -39,7 +39,7 @@ namespace Kernel
 			m_semaphore.unblock();
 	}
 
-	BAN::ErrorOr<size_t> Pipe::read_impl(off_t, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> Pipe::read_impl(off_t, void* buffer, size_t count)
 	{
 		LockGuard _(m_lock);
 		while (m_buffer.empty())
@@ -51,8 +51,8 @@ namespace Kernel
 			m_lock.lock();
 		}
 
-		size_t to_copy = BAN::Math::min<size_t>(buffer.size(), m_buffer.size());
+		size_t to_copy = BAN::Math::min<size_t>(count, m_buffer.size());
-		memcpy(buffer.data(), m_buffer.data(), to_copy);
+		memcpy(buffer, m_buffer.data(), to_copy);
 
 		memmove(m_buffer.data(), m_buffer.data() + to_copy, m_buffer.size() - to_copy);
 		MUST(m_buffer.resize(m_buffer.size() - to_copy));
@@ -64,14 +64,14 @@ namespace Kernel
 		return to_copy;
 	}
 
-	BAN::ErrorOr<size_t> Pipe::write_impl(off_t, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> Pipe::write_impl(off_t, const void* buffer, size_t count)
 	{
 		LockGuard _(m_lock);
 
 		size_t old_size = m_buffer.size();
 
-		TRY(m_buffer.resize(old_size + buffer.size()));
+		TRY(m_buffer.resize(old_size + count));
-		memcpy(m_buffer.data() + old_size, buffer.data(), buffer.size());
+		memcpy(m_buffer.data() + old_size, buffer, count);
 
 		timespec current_time = SystemTimer::get().real_time();
 		m_mtime = current_time;
@@ -79,7 +79,7 @@ namespace Kernel
 
 		m_semaphore.unblock();
 
-		return buffer.size();
+		return count;
 	}
 
 }

kernel/kernel/FS/ProcFS/Inode.cpp

@@ -25,7 +25,7 @@ namespace Kernel
 	{
 	}
 
-	BAN::ErrorOr<BAN::RefPtr<ProcROInode>> ProcROInode::create(Process& process, size_t (Process::*callback)(off_t, BAN::ByteSpan) const, RamFileSystem& fs, mode_t mode, uid_t uid, gid_t gid)
+	BAN::ErrorOr<BAN::RefPtr<ProcROInode>> ProcROInode::create(Process& process, size_t (Process::*callback)(off_t, void*, size_t) const, RamFileSystem& fs, mode_t mode, uid_t uid, gid_t gid)
 	{
 		FullInodeInfo inode_info(fs, mode, uid, gid);
 
@@ -35,7 +35,7 @@ namespace Kernel
 		return BAN::RefPtr<ProcROInode>::adopt(inode_ptr);
 	}
 
-	ProcROInode::ProcROInode(Process& process, size_t (Process::*callback)(off_t, BAN::ByteSpan) const, RamFileSystem& fs, const FullInodeInfo& inode_info)
+	ProcROInode::ProcROInode(Process& process, size_t (Process::*callback)(off_t, void*, size_t) const, RamFileSystem& fs, const FullInodeInfo& inode_info)
 		: RamInode(fs, inode_info)
 		, m_process(process)
 		, m_callback(callback)
@@ -43,12 +43,12 @@ namespace Kernel
 		m_inode_info.mode |= Inode::Mode::IFREG;
 	}
 
-	BAN::ErrorOr<size_t> ProcROInode::read_impl(off_t offset, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> ProcROInode::read_impl(off_t offset, void* buffer, size_t buffer_size)
 	{
 		ASSERT(offset >= 0);
 		if ((size_t)offset >= sizeof(proc_meminfo_t))
 			return 0;
-		return (m_process.*m_callback)(offset, buffer);
+		return (m_process.*m_callback)(offset, buffer, buffer_size);
 	}
 
 }

kernel/kernel/FS/RamFS/Inode.cpp

@@ -48,23 +48,23 @@ namespace Kernel
 		m_inode_info.mode |= Inode::Mode::IFREG;
 	}
 
-	BAN::ErrorOr<size_t> RamFileInode::read_impl(off_t offset, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> RamFileInode::read_impl(off_t offset, void* buffer, size_t bytes)
 	{
 		ASSERT(offset >= 0);
 		if (offset >= size())
 			return 0;
-		size_t to_copy = BAN::Math::min<size_t>(m_inode_info.size - offset, buffer.size());
+		size_t to_copy = BAN::Math::min<size_t>(m_inode_info.size - offset, bytes);
-		memcpy(buffer.data(), m_data.data(), to_copy);
+		memcpy(buffer, m_data.data(), to_copy);
 		return to_copy;
 	}
 
-	BAN::ErrorOr<size_t> RamFileInode::write_impl(off_t offset, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> RamFileInode::write_impl(off_t offset, const void* buffer, size_t bytes)
 	{
 		ASSERT(offset >= 0);
-		if (offset + buffer.size() > (size_t)size())
+		if (offset + bytes > (size_t)size())
-			TRY(truncate_impl(offset + buffer.size()));
+			TRY(truncate_impl(offset + bytes));
-		memcpy(m_data.data() + offset, buffer.data(), buffer.size());
+		memcpy(m_data.data() + offset, buffer, bytes);
-		return buffer.size();
+		return bytes;
 	}
 
 	BAN::ErrorOr<void> RamFileInode::truncate_impl(size_t new_size)

kernel/kernel/Font.cpp

@@ -43,7 +43,7 @@ namespace Kernel
 		BAN::Vector<uint8_t> file_data;
 		TRY(file_data.resize(inode->size()));
 	
-		TRY(inode->read(0, file_data.span()));
+		TRY(inode->read(0, file_data.data(), file_data.size()));
 
 		if (file_data.size() < 4)
 			return BAN::Error::from_error_code(ErrorCode::Font_FileTooSmall);

kernel/kernel/Input/PS2Keyboard.cpp

@@ -217,9 +217,9 @@ namespace Kernel::Input
 		append_command_queue(Command::SET_LEDS, new_leds);
 	}
 
-	BAN::ErrorOr<size_t> PS2Keyboard::read_impl(off_t, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> PS2Keyboard::read_impl(off_t, void* buffer, size_t size)
 	{
-		if (buffer.size() < sizeof(KeyEvent))
+		if (size < sizeof(KeyEvent))
 			return BAN::Error::from_errno(ENOBUFS);
 
 		while (true)
@@ -231,7 +231,7 @@ namespace Kernel::Input
 			if (m_event_queue.empty())
 				continue;
 
-			buffer.as<KeyEvent>() = m_event_queue.front();
+			*(KeyEvent*)buffer = m_event_queue.front();
 			m_event_queue.pop();
 
 			return sizeof(KeyEvent);

kernel/kernel/Memory/FileBackedRegion.cpp

@@ -80,7 +80,7 @@ namespace Kernel
 				page_table.unmap_page(0);
 			}
 
-			if (auto ret = inode->write(i * PAGE_SIZE, BAN::ConstByteSpan::from(page_buffer)); ret.is_error())
+			if (auto ret = inode->write(i * PAGE_SIZE, page_buffer, PAGE_SIZE); ret.is_error())
 				dwarnln("{}", ret.error());
 		}
 	}
@@ -109,7 +109,7 @@ namespace Kernel
 
 			// Zero out the new page
 			if (&PageTable::current() == &m_page_table)
-				read_ret = m_inode->read(file_offset, BAN::ByteSpan((uint8_t*)vaddr, bytes));
+				read_ret = m_inode->read(file_offset, (void*)vaddr, bytes);
 			else
 			{
 				auto& page_table = PageTable::current();
@@ -118,7 +118,7 @@ namespace Kernel
 				ASSERT(page_table.is_page_free(0));
 
 				page_table.map_page_at(paddr, 0, PageTable::Flags::ReadWrite | PageTable::Flags::Present);
-				read_ret = m_inode->read(file_offset, BAN::ByteSpan((uint8_t*)0, bytes));
+				read_ret = m_inode->read(file_offset, (void*)0, bytes);
 				memset((void*)0, 0x00, PAGE_SIZE);
 				page_table.unmap_page(0);
 			}
@@ -156,7 +156,7 @@ namespace Kernel
 				size_t offset = vaddr - m_vaddr;
 				size_t bytes = BAN::Math::min<size_t>(m_size - offset, PAGE_SIZE);
 
-				TRY(m_inode->read(offset, BAN::ByteSpan(m_shared_data->page_buffer, bytes)));
+				TRY(m_inode->read(offset, m_shared_data->page_buffer, bytes));
 
 				auto& page_table = PageTable::current();
 

kernel/kernel/OpenFileDescriptorSet.cpp

@@ -264,24 +264,24 @@ namespace Kernel
 		}
 	}
 
-	BAN::ErrorOr<size_t> OpenFileDescriptorSet::read(int fd, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> OpenFileDescriptorSet::read(int fd, void* buffer, size_t count)
 	{
 		TRY(validate_fd(fd));
 		auto& open_file = m_open_files[fd];
 		if ((open_file->flags & O_NONBLOCK) && !open_file->inode->has_data())
 			return 0;
-		size_t nread = TRY(open_file->inode->read(open_file->offset, buffer));
+		size_t nread = TRY(open_file->inode->read(open_file->offset, buffer, count));
 		open_file->offset += nread;
 		return nread;
 	}
 
-	BAN::ErrorOr<size_t> OpenFileDescriptorSet::write(int fd, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> OpenFileDescriptorSet::write(int fd, const void* buffer, size_t count)
 	{
 		TRY(validate_fd(fd));
 		auto& open_file = m_open_files[fd];
 		if (open_file->flags & O_APPEND)
 			open_file->offset = open_file->inode->size();
-		size_t nwrite = TRY(open_file->inode->write(open_file->offset, buffer));
+		size_t nwrite = TRY(open_file->inode->write(open_file->offset, buffer, count));
 		open_file->offset += nwrite;
 		return nwrite;
 	}

kernel/kernel/Process.cpp

@@ -260,7 +260,7 @@ namespace Kernel
 			thread->set_terminating();
 	}
 
-	size_t Process::proc_meminfo(off_t offset, BAN::ByteSpan buffer) const
+	size_t Process::proc_meminfo(off_t offset, void* buffer, size_t buffer_size) const
 	{
 		ASSERT(offset >= 0);
 		if ((size_t)offset >= sizeof(proc_meminfo_t))
@@ -290,12 +290,12 @@ namespace Kernel
 			}
 		}
 
-		size_t bytes = BAN::Math::min<size_t>(sizeof(proc_meminfo_t) - offset, buffer.size());
+		size_t bytes = BAN::Math::min<size_t>(sizeof(proc_meminfo_t) - offset, buffer_size);
-		memcpy(buffer.data(), (uint8_t*)&meminfo + offset, bytes);
+		memcpy(buffer, (uint8_t*)&meminfo + offset, bytes);
 		return bytes;
 	}
 
-	static size_t read_from_vec_of_str(const BAN::Vector<BAN::String>& container, size_t start, BAN::ByteSpan buffer)
+	static size_t read_from_vec_of_str(const BAN::Vector<BAN::String>& container, size_t start, void* buffer, size_t buffer_size)
 	{
 		size_t offset = 0;
 		size_t written = 0;
@@ -307,11 +307,11 @@ namespace Kernel
 				if (offset < start)
 					elem_offset = start - offset;
 
-				size_t bytes = BAN::Math::min<size_t>(elem.size() + 1 - elem_offset, buffer.size() - written);
+				size_t bytes = BAN::Math::min<size_t>(elem.size() + 1 - elem_offset, buffer_size - written);
-				memcpy(buffer.data() + written, elem.data() + elem_offset, bytes);
+				memcpy((uint8_t*)buffer + written, elem.data() + elem_offset, bytes);
 
 				written += bytes;
-				if (written >= buffer.size())
+				if (written >= buffer_size)
 					break;
 			}
 			offset += elem.size() + 1;
@@ -319,16 +319,16 @@ namespace Kernel
 		return written;
 	}
 
-	size_t Process::proc_cmdline(off_t offset, BAN::ByteSpan buffer) const
+	size_t Process::proc_cmdline(off_t offset, void* buffer, size_t buffer_size) const
 	{
 		LockGuard _(m_lock);
-		return read_from_vec_of_str(m_cmdline, offset, buffer);
+		return read_from_vec_of_str(m_cmdline, offset, buffer, buffer_size);
 	}
 
-	size_t Process::proc_environ(off_t offset, BAN::ByteSpan buffer) const
+	size_t Process::proc_environ(off_t offset, void* buffer, size_t buffer_size) const
 	{
 		LockGuard _(m_lock);
-		return read_from_vec_of_str(m_environ, offset, buffer);
+		return read_from_vec_of_str(m_environ, offset, buffer, buffer_size);
 	}
 
 	BAN::ErrorOr<long> Process::sys_exit(int status)
@@ -723,14 +723,14 @@ namespace Kernel
 	{
 		LockGuard _(m_lock);
 		validate_pointer_access(buffer, count);
-		return TRY(m_open_file_descriptors.read(fd, BAN::ByteSpan((uint8_t*)buffer, count)));
+		return TRY(m_open_file_descriptors.read(fd, buffer, count));
 	}
 
 	BAN::ErrorOr<long> Process::sys_write(int fd, const void* buffer, size_t count)
 	{
 		LockGuard _(m_lock);
 		validate_pointer_access(buffer, count);
-		return TRY(m_open_file_descriptors.write(fd, BAN::ByteSpan((uint8_t*)buffer, count)));
+		return TRY(m_open_file_descriptors.write(fd, buffer, count));
 	}
 
 	BAN::ErrorOr<long> Process::sys_pipe(int fildes[2])

kernel/kernel/Storage/ATA/AHCI/Device.cpp

@@ -1,4 +1,3 @@
-#include <kernel/Scheduler.h>
 #include <kernel/Storage/ATA/AHCI/Controller.h>
 #include <kernel/Storage/ATA/AHCI/Device.h>
 #include <kernel/Storage/ATA/ATADefinitions.h>
@@ -41,7 +40,7 @@ namespace Kernel
 		m_port->ie = 0xFFFFFFFF;
 
 		TRY(read_identify_data());
-		TRY(detail::ATABaseDevice::initialize({ (const uint16_t*)m_data_dma_region->vaddr(), m_data_dma_region->size() / sizeof(uint16_t) }));
+		TRY(detail::ATABaseDevice::initialize({ (const uint16_t*)m_data_dma_region->vaddr(), m_data_dma_region->size() }));
 
 		return {};
 	}
@@ -121,7 +120,8 @@ namespace Kernel
 
 		m_port->ci = 1 << slot.value();
 
-		TRY(block_until_command_completed(slot.value()));
+		// FIXME: timeout
+		do { block_until_irq(); } while (m_port->ci & (1 << slot.value()));
 
 		return {};
 	}
@@ -145,58 +145,41 @@ namespace Kernel
 
 	void AHCIDevice::handle_irq()
 	{
+		ASSERT(!m_has_got_irq);
 		uint16_t err = m_port->serr & 0xFFFF;
 		if (err)
 			print_error(err);
+		m_has_got_irq = true;
 	}
 
-	BAN::ErrorOr<void> AHCIDevice::block_until_command_completed(uint32_t command_slot)
+	void AHCIDevice::block_until_irq()
 	{
-		static constexpr uint64_t total_timeout_ms = 5000;
+		while (!__sync_bool_compare_and_swap(&m_has_got_irq, true, false))
-		static constexpr uint64_t poll_timeout_ms = 10;
+			__builtin_ia32_pause();
-
-		auto start_time = SystemTimer::get().ms_since_boot();
-
-		while (start_time + poll_timeout_ms < SystemTimer::get().ns_since_boot())
-			if (!(m_port->ci & (1 << command_slot)))
-				return {};
-		
-		// FIXME: This should actually block once semaphores support blocking with timeout.
-		//        This doesn't allow scheduler to go properly idle.
-		while (start_time + total_timeout_ms < SystemTimer::get().ns_since_boot())
-		{
-			Scheduler::get().reschedule();
-			if (!(m_port->ci & (1 << command_slot)))
-				return {};
 	}
 
-		return BAN::Error::from_errno(ETIMEDOUT);
+	BAN::ErrorOr<void> AHCIDevice::read_sectors_impl(uint64_t lba, uint64_t sector_count, uint8_t* buffer)
-	}
-
-	BAN::ErrorOr<void> AHCIDevice::read_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ByteSpan buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * sector_size());
 		const size_t sectors_per_page = PAGE_SIZE / sector_size();
 		for (uint64_t sector_off = 0; sector_off < sector_count; sector_off += sectors_per_page)
 		{
 			uint64_t to_read = BAN::Math::min<uint64_t>(sector_count - sector_off, sectors_per_page);
 
 			TRY(send_command_and_block(lba + sector_off, to_read, Command::Read));
-			memcpy(buffer.data() + sector_off * sector_size(), (void*)m_data_dma_region->vaddr(), to_read * sector_size());
+			memcpy(buffer + sector_off * sector_size(), (void*)m_data_dma_region->vaddr(), to_read * sector_size());
 		}
 
 		return {};
 	}
 
-	BAN::ErrorOr<void> AHCIDevice::write_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<void> AHCIDevice::write_sectors_impl(uint64_t lba, uint64_t sector_count, const uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * sector_size());
 		const size_t sectors_per_page = PAGE_SIZE / sector_size();
 		for (uint64_t sector_off = 0; sector_off < sector_count; sector_off += sectors_per_page)
 		{
 			uint64_t to_read = BAN::Math::min<uint64_t>(sector_count - sector_off, sectors_per_page);
 
-			memcpy((void*)m_data_dma_region->vaddr(), buffer.data() + sector_off * sector_size(), to_read * sector_size());
+			memcpy((void*)m_data_dma_region->vaddr(), buffer + sector_off * sector_size(), to_read * sector_size());
 			TRY(send_command_and_block(lba + sector_off, to_read, Command::Write));
 		}
 
@@ -275,7 +258,8 @@ namespace Kernel
 
 		m_port->ci = 1 << slot.value();
 
-		TRY(block_until_command_completed(slot.value()));
+		// FIXME: timeout
+		do { block_until_irq(); } while (m_port->ci & (1 << slot.value()));
 
 		return {};
 	}

kernel/kernel/Storage/ATA/ATABus.cpp

@@ -228,10 +228,8 @@ namespace Kernel
 		return BAN::Error::from_error_code(ErrorCode::None);
 	}
 
-	BAN::ErrorOr<void> ATABus::read(ATADevice& device, uint64_t lba, uint64_t sector_count, BAN::ByteSpan buffer)
+	BAN::ErrorOr<void> ATABus::read(ATADevice& device, uint64_t lba, uint8_t sector_count, uint8_t* buffer)
 	{
-		ASSERT(sector_count <= 0xFF);
-		ASSERT(buffer.size() >= sector_count * device.sector_size());
 		if (lba + sector_count > device.sector_count())
 			return BAN::Error::from_error_code(ErrorCode::Storage_Boundaries);
 
@@ -253,7 +251,7 @@ namespace Kernel
 			for (uint32_t sector = 0; sector < sector_count; sector++)
 			{
 				block_until_irq();
-				read_buffer(ATA_PORT_DATA, (uint16_t*)buffer.data() + sector * device.words_per_sector(), device.words_per_sector());
+				read_buffer(ATA_PORT_DATA, (uint16_t*)buffer + sector * device.words_per_sector(), device.words_per_sector());
 			}
 		}
 		else
@@ -265,10 +263,8 @@ namespace Kernel
 		return {};
 	}
 
-	BAN::ErrorOr<void> ATABus::write(ATADevice& device, uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<void> ATABus::write(ATADevice& device, uint64_t lba, uint8_t sector_count, const uint8_t* buffer)
 	{
-		ASSERT(sector_count <= 0xFF);
-		ASSERT(buffer.size() >= sector_count * device.sector_size());
 		if (lba + sector_count > device.sector_count())
 			return BAN::Error::from_error_code(ErrorCode::Storage_Boundaries);
 
@@ -289,7 +285,7 @@ namespace Kernel
 
 			for (uint32_t sector = 0; sector < sector_count; sector++)
 			{
-				write_buffer(ATA_PORT_DATA, (uint16_t*)buffer.data() + sector * device.words_per_sector(), device.words_per_sector());
+				write_buffer(ATA_PORT_DATA, (uint16_t*)buffer + sector * device.words_per_sector(), device.words_per_sector());
 				block_until_irq();
 			}
 		}

kernel/kernel/Storage/ATA/ATADevice.cpp

@@ -82,24 +82,24 @@ namespace Kernel
 		return {};
 	}
 
-	BAN::ErrorOr<size_t> detail::ATABaseDevice::read_impl(off_t offset, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> detail::ATABaseDevice::read_impl(off_t offset, void* buffer, size_t bytes)
 	{
 		if (offset % sector_size())
 			return BAN::Error::from_errno(EINVAL);
-		if (buffer.size() % sector_size())
+		if (bytes % sector_size())
 			return BAN::Error::from_errno(EINVAL);
-		TRY(read_sectors(offset / sector_size(), buffer.size() / sector_size(), buffer));
+		TRY(read_sectors(offset / sector_size(), bytes / sector_size(), (uint8_t*)buffer));
-		return buffer.size();
+		return bytes;
 	}
 
-	BAN::ErrorOr<size_t> detail::ATABaseDevice::write_impl(off_t offset, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> detail::ATABaseDevice::write_impl(off_t offset, const void* buffer, size_t bytes)
 	{
 		if (offset % sector_size())
 			return BAN::Error::from_errno(EINVAL);
-		if (buffer.size() % sector_size())
+		if (bytes % sector_size())
 			return BAN::Error::from_errno(EINVAL);
-		TRY(write_sectors(offset / sector_size(), buffer.size() / sector_size(), buffer));
+		TRY(write_sectors(offset / sector_size(), bytes / sector_size(), (const uint8_t*)buffer));
-		return buffer.size();
+		return bytes;
 	}
 
 	BAN::ErrorOr<BAN::RefPtr<ATADevice>> ATADevice::create(BAN::RefPtr<ATABus> bus, ATABus::DeviceType type, bool is_secondary, BAN::Span<const uint16_t> identify_data)
@@ -118,16 +118,14 @@ namespace Kernel
 		, m_is_secondary(is_secondary)
 	{ }
 
-	BAN::ErrorOr<void> ATADevice::read_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ByteSpan buffer)
+	BAN::ErrorOr<void> ATADevice::read_sectors_impl(uint64_t lba, uint64_t sector_count, uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * sector_size());
 		TRY(m_bus->read(*this, lba, sector_count, buffer));
 		return {};
 	}
 
-	BAN::ErrorOr<void> ATADevice::write_sectors_impl(uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<void> ATADevice::write_sectors_impl(uint64_t lba, uint64_t sector_count, const uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * sector_size());
 		TRY(m_bus->write(*this, lba, sector_count, buffer));
 		return {};
 	}

kernel/kernel/Storage/DiskCache.cpp

@@ -24,10 +24,8 @@ namespace Kernel
 		release_all_pages();
 	}
 
-	bool DiskCache::read_from_cache(uint64_t sector, BAN::ByteSpan buffer)
+	bool DiskCache::read_from_cache(uint64_t sector, uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= m_sector_size);
-
 		uint64_t sectors_per_page = PAGE_SIZE / m_sector_size;
 		uint64_t page_cache_offset = sector % sectors_per_page;
 		uint64_t page_cache_start = sector - page_cache_offset;
@@ -48,7 +46,7 @@ namespace Kernel
 
 			CriticalScope _;
 			page_table.map_page_at(cache.paddr, 0, PageTable::Flags::Present);
-			memcpy(buffer.data(), (void*)(page_cache_offset * m_sector_size), m_sector_size);
+			memcpy(buffer, (void*)(page_cache_offset * m_sector_size), m_sector_size);
 			page_table.unmap_page(0);
 
 			return true;
@@ -57,9 +55,8 @@ namespace Kernel
 		return false;
 	};
 
-	BAN::ErrorOr<void> DiskCache::write_to_cache(uint64_t sector, BAN::ConstByteSpan buffer, bool dirty)
+	BAN::ErrorOr<void> DiskCache::write_to_cache(uint64_t sector, const uint8_t* buffer, bool dirty)
 	{
-		ASSERT(buffer.size() >= m_sector_size);
 		uint64_t sectors_per_page = PAGE_SIZE / m_sector_size;
 		uint64_t page_cache_offset = sector % sectors_per_page;
 		uint64_t page_cache_start = sector - page_cache_offset;
@@ -83,7 +80,7 @@ namespace Kernel
 			{
 				CriticalScope _;
 				page_table.map_page_at(cache.paddr, 0, PageTable::Flags::ReadWrite | PageTable::Flags::Present);
-				memcpy((void*)(page_cache_offset * m_sector_size), buffer.data(), m_sector_size);
+				memcpy((void*)(page_cache_offset * m_sector_size), buffer, m_sector_size);
 				page_table.unmap_page(0);
 			}
 
@@ -113,8 +110,8 @@ namespace Kernel
 
 		{
 			CriticalScope _;
-			page_table.map_page_at(cache.paddr, 0, PageTable::Flags::ReadWrite | PageTable::Flags::Present);
+			page_table.map_page_at(cache.paddr, 0, PageTable::Flags::Present);
-			memcpy((void*)(page_cache_offset * m_sector_size), buffer.data(), m_sector_size);
+			memcpy((void*)(page_cache_offset * m_sector_size), buffer, m_sector_size);
 			page_table.unmap_page(0);
 		}
 
@@ -152,8 +149,7 @@ namespace Kernel
 				else
 				{
 					dprintln_if(DEBUG_SYNC, "syncing {}->{}", cache.first_sector + sector_start, cache.first_sector + sector_start + sector_count);
-					auto data_slice = m_sync_cache.span().slice(sector_start * m_sector_size, sector_count * m_sector_size);
+					TRY(m_device.write_sectors_impl(cache.first_sector + sector_start, sector_count, m_sync_cache.data() + sector_start * m_sector_size));
-					TRY(m_device.write_sectors_impl(cache.first_sector + sector_start, sector_count, data_slice));
 					sector_start += sector_count + 1;
 					sector_count = 0;
 				}
@@ -162,8 +158,7 @@ namespace Kernel
 			if (sector_count > 0)
 			{
 				dprintln_if(DEBUG_SYNC, "syncing {}->{}", cache.first_sector + sector_start, cache.first_sector + sector_start + sector_count);
-				auto data_slice = m_sync_cache.span().slice(sector_start * m_sector_size, sector_count * m_sector_size);
+				TRY(m_device.write_sectors_impl(cache.first_sector + sector_start, sector_count, m_sync_cache.data() + sector_start * m_sector_size));
-				TRY(m_device.write_sectors_impl(cache.first_sector + sector_start, sector_count, data_slice));
 			}
 
 			cache.dirty_mask = 0;

kernel/kernel/Storage/StorageDevice.cpp

@@ -153,10 +153,8 @@ namespace Kernel
 		if (total_size() < sizeof(GPTHeader))
 			return BAN::Error::from_error_code(ErrorCode::Storage_GPTHeader);
 
-		BAN::Vector<uint8_t> lba1;
+		BAN::Vector<uint8_t> lba1(sector_size());
-		TRY(lba1.resize(sector_size()));
+		TRY(read_sectors(1, 1, lba1.data()));
-
-		TRY(read_sectors(1, 1, lba1.span()));
 
 		const GPTHeader& header = *(const GPTHeader*)lba1.data();
 		if (!is_valid_gpt_header(header, sector_size()))
@@ -171,7 +169,7 @@ namespace Kernel
 
 		BAN::Vector<uint8_t> entry_array;
 		TRY(entry_array.resize(size));
-		TRY(read_sectors(header.partition_entry_lba, size / sector_size(), entry_array.span()));
+		TRY(read_sectors(header.partition_entry_lba, size / sector_size(), entry_array.data()));
 
 		if (!is_valid_gpt_crc32(header, lba1, entry_array))
 			return BAN::Error::from_error_code(ErrorCode::Storage_GPTHeader);
@@ -228,9 +226,8 @@ namespace Kernel
 		memcpy(m_label, label, sizeof(m_label));
 	}
 
-	BAN::ErrorOr<void> Partition::read_sectors(uint64_t lba, uint8_t sector_count, BAN::ByteSpan buffer)
+	BAN::ErrorOr<void> Partition::read_sectors(uint64_t lba, uint8_t sector_count, uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * m_device.sector_size());
 		const uint32_t sectors_in_partition = m_lba_end - m_lba_start;
 		if (lba + sector_count > sectors_in_partition)
 			return BAN::Error::from_error_code(ErrorCode::Storage_Boundaries);
@@ -238,9 +235,8 @@ namespace Kernel
 		return {};
 	}
 
-	BAN::ErrorOr<void> Partition::write_sectors(uint64_t lba, uint8_t sector_count, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<void> Partition::write_sectors(uint64_t lba, uint8_t sector_count, const uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * m_device.sector_size());
 		const uint32_t sectors_in_partition = m_lba_end - m_lba_start;
 		if (lba + sector_count > sectors_in_partition)
 			return BAN::Error::from_error_code(ErrorCode::Storage_Boundaries);
@@ -248,23 +244,23 @@ namespace Kernel
 		return {};
 	}
 
-	BAN::ErrorOr<size_t> Partition::read_impl(off_t offset, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> Partition::read_impl(off_t offset, void* buffer, size_t bytes)
 	{
 		ASSERT(offset >= 0);
 
-		if (offset % m_device.sector_size() || buffer.size() % m_device.sector_size())
+		if (offset % m_device.sector_size() || bytes % m_device.sector_size())
 			return BAN::Error::from_errno(ENOTSUP);
 
 		const uint32_t sectors_in_partition = m_lba_end - m_lba_start;
 		uint32_t lba = offset / m_device.sector_size();
-		uint32_t sector_count = buffer.size() / m_device.sector_size();
+		uint32_t sector_count = bytes / m_device.sector_size();
 
 		if (lba == sectors_in_partition)
 			return 0;
 		if (lba + sector_count > sectors_in_partition)
 			sector_count = sectors_in_partition - lba;
 
-		TRY(read_sectors(lba, sector_count, buffer));
+		TRY(read_sectors(lba, sector_count, (uint8_t*)buffer));
 		return sector_count * m_device.sector_size();
 	}
 
@@ -287,51 +283,36 @@ namespace Kernel
 		return {};
 	}
 
-	BAN::ErrorOr<void> StorageDevice::read_sectors(uint64_t lba, uint64_t sector_count, BAN::ByteSpan buffer)
+	BAN::ErrorOr<void> StorageDevice::read_sectors(uint64_t lba, uint64_t sector_count, uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * sector_size());
-
-		{
-			LockGuard _(m_lock);
-			Thread::TerminateBlocker blocker(Thread::current());
-			if (!m_disk_cache.has_value())
-				return read_sectors_impl(lba, sector_count, buffer);
-		}
-
 		for (uint64_t offset = 0; offset < sector_count; offset++)
 		{
 			LockGuard _(m_lock);
 			Thread::TerminateBlocker blocker(Thread::current());
 
-			auto sector_buffer = buffer.slice(offset * sector_size(), sector_size());
+			uint8_t* buffer_ptr = buffer + offset * sector_size();
-			if (m_disk_cache->read_from_cache(lba + offset, sector_buffer))
+			if (m_disk_cache.has_value())
+				if (m_disk_cache->read_from_cache(lba + offset, buffer_ptr))
 					continue;
-			TRY(read_sectors_impl(lba + offset, 1, sector_buffer));
+			TRY(read_sectors_impl(lba + offset, 1, buffer_ptr));
-			(void)m_disk_cache->write_to_cache(lba + offset, sector_buffer, false);
+			if (m_disk_cache.has_value())
+				(void)m_disk_cache->write_to_cache(lba + offset, buffer_ptr, false);
 		}
 		
 		return {};
 	}
 
-	BAN::ErrorOr<void> StorageDevice::write_sectors(uint64_t lba, uint64_t sector_count, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<void> StorageDevice::write_sectors(uint64_t lba, uint64_t sector_count, const uint8_t* buffer)
 	{
-		ASSERT(buffer.size() >= sector_count * sector_size());
+		// TODO: use disk cache for dirty pages. I don't wanna think about how to do it safely now
-
-		{
-			LockGuard _(m_lock);
-			Thread::TerminateBlocker blocker(Thread::current());
-			if (!m_disk_cache.has_value())
-				return write_sectors_impl(lba, sector_count, buffer);
-		}
-
 		for (uint8_t offset = 0; offset < sector_count; offset++)
 		{
 			LockGuard _(m_lock);
 			Thread::TerminateBlocker blocker(Thread::current());
 
-			auto sector_buffer = buffer.slice(offset * sector_size(), sector_size());
+			const uint8_t* buffer_ptr = buffer + offset * sector_size();
-			if (m_disk_cache->write_to_cache(lba + offset, sector_buffer, true).is_error())
+			if (!m_disk_cache.has_value() || m_disk_cache->write_to_cache(lba + offset, buffer_ptr, true).is_error())
-				TRY(write_sectors_impl(lba + offset, 1, sector_buffer));
+				TRY(write_sectors_impl(lba + offset, 1, buffer_ptr));
 		}
 
 		return {};

kernel/kernel/Terminal/TTY.cpp

@@ -95,7 +95,7 @@ namespace Kernel
 						TTY::current()->m_tty_ctrl.semaphore.block();
 
 					Input::KeyEvent event;
-					size_t read = MUST(inode->read(0, BAN::ByteSpan::from(event)));
+					size_t read = MUST(inode->read(0, &event, sizeof(event)));
 					ASSERT(read == sizeof(event));
 					TTY::current()->on_key_event(event);
 				}
@@ -298,7 +298,7 @@ namespace Kernel
 			putchar_impl(ch);
 	}
 
-	BAN::ErrorOr<size_t> TTY::read_impl(off_t, BAN::ByteSpan buffer)
+	BAN::ErrorOr<size_t> TTY::read_impl(off_t, void* buffer, size_t count)
 	{
 		LockGuard _(m_lock);
 		while (!m_output.flush)
@@ -314,8 +314,8 @@ namespace Kernel
 			return 0;
 		}
 
-		size_t to_copy = BAN::Math::min<size_t>(buffer.size(), m_output.bytes);
+		size_t to_copy = BAN::Math::min<size_t>(count, m_output.bytes);
-		memcpy(buffer.data(), m_output.buffer.data(), to_copy);
+		memcpy(buffer, m_output.buffer.data(), to_copy);
 
 		memmove(m_output.buffer.data(), m_output.buffer.data() + to_copy, m_output.bytes - to_copy);
 		m_output.bytes -= to_copy;
@@ -328,12 +328,12 @@ namespace Kernel
 		return to_copy;
 	}
 
-	BAN::ErrorOr<size_t> TTY::write_impl(off_t, BAN::ConstByteSpan buffer)
+	BAN::ErrorOr<size_t> TTY::write_impl(off_t, const void* buffer, size_t count)
 	{
 		LockGuard _(m_lock);
-		for (size_t i = 0; i < buffer.size(); i++)
+		for (size_t i = 0; i < count; i++)
-			putchar(buffer[i]);
+			putchar(((uint8_t*)buffer)[i]);
-		return buffer.size();
+		return count;
 	}
 
 	bool TTY::has_data_impl() const

qemu.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -e
+
+if [ -z ${OVMF_PATH+x} ]; then
+	OVMF_PATH="/usr/share/ovmf/x64/OVMF.fd"
+fi
+
+if [ "$UEFI_BOOT" == "1" ]; then
+	BIOS_ARGS="-bios $OVMF_PATH -net none"
+fi
+
+qemu-system-$BANAN_ARCH											\
+	-m 128														\
+	-smp 2														\
+	$BIOS_ARGS													\
+	-drive format=raw,id=disk,file=${DISK_IMAGE_PATH},if=none	\
+	-device ahci,id=ahci										\
+	-device ide-hd,drive=disk,bus=ahci.0						\
+	$@															\

script/build.sh

@@ -1,107 +0,0 @@
-#!/bin/bash
-set -e
-
-if [[ -z $BANAN_ARCH ]]; then
-	export BANAN_ARCH=x86_64
-fi
-
-export BANAN_SCRIPT_DIR=$(dirname $(realpath $0))
-source $BANAN_SCRIPT_DIR/config.sh
-
-make_build_dir () {
-	if ! [[ -d $BANAN_BUILD_DIR ]]; then
-		mkdir -p $BANAN_BUILD_DIR
-		cd $BANAN_BUILD_DIR
-		cmake --toolchain=$BANAN_TOOLCHAIN_DIR/Toolchain.txt -G Ninja $BANAN_ROOT_DIR $BANAN_CMAKE_ARGS
-	fi
-}
-
-build_target () {
-	make_build_dir
-	if [[ -z $1 ]]; then
-		echo "No target provided"
-		exit 1
-	fi
-	cd $BANAN_BUILD_DIR
-	ninja $1
-}
-
-build_toolchain () {
-	$BANAN_TOOLCHAIN_DIR/build.sh
-	build_target libc-install
-	$BANAN_TOOLCHAIN_DIR/build.sh libstdc++
-}
-
-create_image () {
-	build_target install-sysroot
-	if [[ "$1" == "full" ]]; then
-		$BANAN_SCRIPT_DIR/image-full.sh
-	else
-		$BANAN_SCRIPT_DIR/image.sh
-	fi
-}
-
-run_qemu () {
-	create_image
-	$BANAN_SCRIPT_DIR/qemu.sh $@
-}
-
-run_bochs () {
-	create_image
-	$BANAN_SCRIPT_DIR/bochs.sh $@
-}
-
-if [[ "$1" == "toolchain" ]]; then
-	if [[ -f $BANAN_TOOLCHAIN_PREFIX/bin/$BANAN_TOOLCHAIN_TRIPLE_PREFIX-gcc ]]; then
-		echo "You already seem to have build toolchain."
-		read -e -p "Do you want to rebuild it [y/N]? " choice
-		if ! [[ "$choice" == [Yy]* ]]; then
-			echo "Aborting toolchain rebuild"
-			exit 0
-		fi
-	fi
-
-	build_toolchain
-	exit 0
-fi
-
-if [[ "$1" == "image" ]]; then
-	create_image
-	exit 0
-fi
-
-if [[ "$1" == "image-full" ]]; then
-	create_image full
-	exit 0
-fi
-
-if [[ "$(uname)" == "Linux" ]]; then
-	QEMU_ACCEL="-accel kvm"
-fi
-
-if [[ "$1" == "qemu" ]]; then
-	run_qemu -serial stdio $QEMU_ACCEL
-	exit 0
-fi
-
-if [[ "$1" == "qemu-nographic" ]]; then
-	run_qemu -nographic $QEMU_ACCEL
-	exit 0
-fi
-
-if [[ "$1" == "qemu-debug" ]]; then
-	run_qemu -serial stdio -d int -no-reboot
-	exit 0
-fi
-
-if [[ "$1" == "bochs" ]]; then
-	run_bochs
-	exit 0
-fi
-
-if [[ "$1" == "check-fs" ]]; then
-	$BANAN_SCRIPT_DIR/check-fs.sh
-	exit 0
-fi
-
-build_target $1

script/check-fs.sh

@@ -1,14 +0,0 @@
-#!/bin/bash
-set -e
-
-if [[ -z $BANAN_DISK_IMAGE_PATH ]]; then
-	echo "You must set BANAN_DISK_IMAGE_PATH environment variable" >&2
-	exit 1
-fi
-
-LOOP_DEV=$(sudo losetup -f --show $BANAN_DISK_IMAGE_PATH)
-sudo partprobe $LOOP_DEV
-
-sudo fsck.ext2 -fn ${LOOP_DEV}p2 || true
-
-sudo losetup -d $LOOP_DEV

script/config.sh

@@ -1,27 +0,0 @@
-if [[ -z $BANAN_ROOT_DIR ]]; then
-	if [[ -z $BANAN_SCRIPT_DIR ]]; then
-		export BANAN_ROOT_DIR=$BANAN_SCRIPT_DIR/..
-	else
-		echo  "You must set the BANAN_ROOT_DIR environment variable" >&2
-		exit 1
-	fi
-fi
-
-if [[ -z $BANAN_ARCH ]]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
-
-export BANAN_TOOLCHAIN_DIR=$BANAN_ROOT_DIR/toolchain
-export BANAN_TOOLCHAIN_PREFIX=$BANAN_TOOLCHAIN_DIR/local
-export BANAN_TOOLCHAIN_TRIPLE_PREFIX=$BANAN_ARCH-banan_os
-
-export BANAN_BUILD_DIR=$BANAN_ROOT_DIR/build
-
-export BANAN_SYSROOT=$BANAN_BUILD_DIR/sysroot
-
-export BANAN_DISK_IMAGE_PATH=$BANAN_BUILD_DIR/banan-os.img
-
-if [[ -z $BANAN_UEFI_BOOT ]]; then
-	export BANAN_UEFI_BOOT=0
-fi

script/image.sh

@@ -1,45 +0,0 @@
-#!/bin/bash
-
-if [[ -z $BANAN_ROOT_DIR ]]; then
-	echo  "You must set the BANAN_ROOT_DIR environment variable" >&2
-	exit 1
-fi
-
-if [[ -z $BANAN_DISK_IMAGE_PATH ]]; then
-	echo  "You must set the BANAN_DISK_IMAGE_PATH environment variable" >&2
-	exit 1
-fi
-
-if [[ -z $BANAN_SYSROOT ]]; then
-	echo  "You must set the BANAN_SYSROOT environment variable" >&2
-	exit 1
-fi
-
-if [[ ! -f $BANAN_DISK_IMAGE_PATH ]]; then
-	$BANAN_SCRIPT_DIR/image-full.sh
-	exit 0
-fi
-
-fdisk -l $BANAN_DISK_IMAGE_PATH | grep -q 'EFI System'; IMAGE_IS_UEFI=$?
-[[ $BANAN_UEFI_BOOT == 1 ]]; CREATE_IS_UEFI=$?
-
-if [[ $IMAGE_IS_UEFI -ne $CREATE_IS_UEFI ]]; then
-	echo Converting disk image to/from UEFI
-	$BANAN_SCRIPT_DIR/image-full.sh
-	exit 0
-fi
-
-MOUNT_DIR=/mnt
-
-LOOP_DEV=$(sudo losetup -f --show $BANAN_DISK_IMAGE_PATH)
-sudo partprobe $LOOP_DEV
-
-ROOT_PARTITON=${LOOP_DEV}p2
-
-sudo mount $ROOT_PARTITON $MOUNT_DIR
-
-sudo rsync -a ${BANAN_SYSROOT}/* ${MOUNT_DIR}/
-
-sudo umount $MOUNT_DIR
-
-sudo losetup -d $LOOP_DEV

script/qemu.sh

@@ -1,24 +0,0 @@
-#!/bin/bash
-set -e
-
-if [[ -z $BANAN_DISK_IMAGE_PATH ]]; then
-	echo "You must set the BANAN_DISK_IMAGE_PATH environment variable" >&2
-	exit 1
-fi
-
-if [[ -z $OVMF_PATH ]]; then
-	OVMF_PATH="/usr/share/ovmf/x64/OVMF.fd"
-fi
-
-if [[ "$BANAN_UEFI_BOOT" == "1" ]]; then
-	BIOS_ARGS="-bios $OVMF_PATH -net none"
-fi
-
-qemu-system-$BANAN_ARCH												\
-	-m 128															\
-	-smp 2															\
-	$BIOS_ARGS														\
-	-drive format=raw,id=disk,file=${BANAN_DISK_IMAGE_PATH},if=none	\
-	-device ahci,id=ahci											\
-	-device ide-hd,drive=disk,bus=ahci.0							\
-	$@																\

toolchain/Toolchain.txt

@@ -1,18 +0,0 @@
-if (NOT DEFINED ENV{BANAN_ARCH})
-	message(FATAL_ERROR "environment variable BANAN_ARCH not defined")
-endif ()
-
-set(BANAN_ARCH $ENV{BANAN_ARCH})
-
-set(TOOLCHAIN_PREFIX ${CMAKE_SOURCE_DIR}/toolchain/local)
-
-set(CMAKE_SYSTEM_NAME banan-os)
-set(CMAKE_SYSTEM_PROCESSOR AMD64)
-
-set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED True)
-set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}/bin/${BANAN_ARCH}-banan_os-g++)
-set(CMAKE_CXX_COMPILER_WORKS True)
-
-set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}/bin/${BANAN_ARCH}-banan_os-gcc)
-set(CMAKE_C_COMPILER_WORKS True)

toolchain/build.sh

@@ -5,36 +5,36 @@ BINUTILS_VERSION="binutils-2.39"
 GCC_VERSION="gcc-12.2.0"
 GRUB_VERSION="grub-2.06"
 
-if [[ -z $BANAN_SYSROOT ]]; then
+cd $(dirname "$0")
-	echo "You must set the BANAN_SYSROOT environment variable" >&2
+
+if [[ -n $LIBSTDCPP ]]; then
+	cd build/${GCC_VERSION}/
+	make -j $(nproc) all-target-libstdc++-v3
+	make install-target-libstdc++-v3
+	exit 0
+fi
+
+if [[ -z $SYSROOT ]]; then
+	echo "You must set the SYSROOT environment variable" >&2
 	exit 1
 fi
 
-if [[ -z $BANAN_TOOLCHAIN_DIR ]]; then
+if [[ -z $PREFIX ]]; then
-	echo "You must set the BANAN_TOOLCHAIN_DIR environment variable" >&2
+	echo "You must set the PREFIX environment variable" >&2
 	exit 1
 fi
 
-if [[ -z $BANAN_TOOLCHAIN_PREFIX ]]; then
+if [[ -z $ARCH ]]; then
-	echo "You must set the BANAN_TOOLCHAIN_PREFIX environment variable" >&2
+	echo  "You must set the ARCH environment variable" >&2
 	exit 1
 fi
 
-if [[ -z $BANAN_TOOLCHAIN_TRIPLE_PREFIX ]]; then
+TARGET="${ARCH}-banan_os"
-	echo "You must set the BANAN_TOOLCHAIN_TRIPLE_PREFIX environment variable" >&2
-	exit 1
-fi
 
-if [[ -z $BANAN_ARCH ]]; then
+if [ ! -f ${PREFIX}/bin/${TARGET}-ld ]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
 
-build_binutils () {
 	echo "Building ${BINUTILS_VERSION}"
 
-	cd $BANAN_TOOLCHAIN_DIR
-
 	if [ ! -f ${BINUTILS_VERSION}.tar.xz ]; then
 		wget https://ftp.gnu.org/gnu/binutils/${BINUTILS_VERSION}.tar.xz
 	fi
@@ -45,24 +45,26 @@ build_binutils () {
 	fi
 
 	mkdir -p build/${BINUTILS_VERSION}/
-	cd build/${BINUTILS_VERSION}/
+	pushd build/${BINUTILS_VERSION}/
 
 	../../${BINUTILS_VERSION}/configure \
-		--target="$BANAN_TOOLCHAIN_TRIPLE_PREFIX" \
+		--target="$TARGET" \
-		--prefix="$BANAN_TOOLCHAIN_PREFIX" \
+		--prefix="$PREFIX" \
-		--with-sysroot="$BANAN_SYSROOT" \
+		--with-sysroot="$SYSROOT" \
 		--disable-nls \
 		--disable-werror
 
 	make -j $(nproc)
 	make install
-}
 
-build_gcc () {
+	popd
+
+fi
+
+if [ ! -f ${PREFIX}/bin/${TARGET}-g++ ]; then
+
 	echo "Building ${GCC_VERSION}"
 
-	cd $BANAN_TOOLCHAIN_DIR
-
 	if [ ! -f ${GCC_VERSION}.tar.xz ]; then
 		wget https://ftp.gnu.org/gnu/gcc/${GCC_VERSION}/${GCC_VERSION}.tar.xz
 	fi
@@ -73,25 +75,27 @@ build_gcc () {
 	fi
 
 	mkdir -p build/${GCC_VERSION}/
-	cd build/${GCC_VERSION}/
+	pushd build/${GCC_VERSION}/
 
 	../../${GCC_VERSION}/configure \
-		--target="$BANAN_TOOLCHAIN_TRIPLE_PREFIX" \
+		--target="$TARGET" \
-		--prefix="$BANAN_TOOLCHAIN_PREFIX" \
+		--prefix="$PREFIX" \
-		--with-sysroot="$BANAN_SYSROOT" \
+		--with-sysroot="$SYSROOT" \
 		--disable-nls \
 		--enable-languages=c,c++
 
 	make -j $(nproc) all-gcc 
 	make -j $(nproc) all-target-libgcc CFLAGS_FOR_TARGET='-g -O2 -mcmodel=large -mno-red-zone'
 	make install-gcc install-target-libgcc
-}
 
-build_grub () {
+	popd
+
+fi
+
+if [ ! -f ${PREFIX}/bin/grub-mkstandalone ]; then
+
 	echo "Building ${GRUB_VERSION}"
 
-	cd $BANAN_TOOLCHAIN_DIR
-
 	if [ ! -f ${GRUB_VERSION}.tar.xz ]; then
 		wget https://ftp.gnu.org/gnu/grub/${GRUB_VERSION}.tar.xz
 	fi
@@ -101,29 +105,17 @@ build_grub () {
 	fi
 
 	mkdir -p build/${GRUB_VERSION}/
-	cd build/${GRUB_VERSION}/
+	pushd build/${GRUB_VERSION}/
 
 	../../${GRUB_VERSION}/configure \
-		--target="$BANAN_ARCH" \
+		--target="$ARCH" \
-		--prefix="$BANAN_TOOLCHAIN_PREFIX" \
+		--prefix="$PREFIX" \
 		--with-platform="efi" \
 		--disable-werror
 	
 	make -j $(nproc)
 	make install
-}
 
-build_libstdcpp () {
+	popd
-	cd build/${GCC_VERSION}/
-	make -j $(nproc) all-target-libstdc++-v3
-	make install-target-libstdc++-v3
-}
 
-if [[ "$1" == "libstdc++" ]]; then
-	build_libstdcpp
-	exit 0
 fi
-
-build_binutils
-build_gcc
-build_grub

toolchain/local/.gitignore

@@ -1 +0,0 @@
-*/