Bazel build

60 files changed, 573 insertions, 300 deletions

diff --git a/.bazel/compiler_flags.bazelrc b/.bazel/compiler_flags.bazelrc
new file mode 100644
index 0000000..59a87f3
--- /dev/null
+++ b/.bazel/compiler_flags.bazelrc
@@ -0,0 +1,27 @@
+build --copt=-Wall
+build --copt=-Wextra
+build --copt=-Wpedantic
+build --copt=-Werror=shadow
+build --copt=-Wunused-parameter
+build --copt=-Wmisleading-indentation
+build --copt=-Wundef
+build --copt=-Wuninitialized
+
+# cast warnings
+build --copt=-Wcast-align
+build --copt=-Wcast-qual
+
+# conversion
+build --copt=-Wconversion
+build --copt=-Wsign-conversion
+build --copt=-Wdouble-promotion
+
+# pointers
+build --copt=-Wpointer-arith
+build --copt=-Wnull-dereference
+
+# cpp flags
+build --cxxopt=-Wnon-virtual-dtor
+build --cxxopt=-Woverloaded-virtual
+build --cxxopt=-Wold-style-cast
+
diff --git a/.bazelrc b/.bazelrc
new file mode 100644
index 0000000..2a0a947
--- /dev/null
+++ b/.bazelrc
@@ -0,0 +1,11 @@
+# compiler flags
+try-import %workspace%/.bazel/compiler_flags.bazelrc
+
+build --instrument_test_targets
+
+build:i386 --compilation_mode=opt
+build:i386 --platforms=//platforms:i386
+
+coverage --combined_report=lcov
+
+test --compilation_mode=dbg
diff --git a/.gitignore b/.gitignore
index 8ae6f9f..001d9bc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,13 +1,3 @@
-lib/musl*
-build
-*.a
-*.elf
-*.iso
-isodir
-src/conf.h
+bazel-*
 .config.old
-doc
 
-# test files
-test_*
-!test_*.cc
diff --git a/BUILD.bazel b/BUILD.bazel
new file mode 100644
index 0000000..9c05b27
--- /dev/null
+++ b/BUILD.bazel
@@ -0,0 +1,13 @@
+load("//tools:make_iso.bzl", "make_iso")
+load("//tools:qemu.bzl", "qemu")
+
+make_iso(
+    name = "glitch",
+    bootloader = "//grub:grub.cfg",
+    kernel = "//kernel:glitch.elf",
+)
+
+qemu(
+    name = "qemu",
+    cdrom = ":glitch",
+)
diff --git a/MODULE.bazel b/MODULE.bazel
new file mode 100644
index 0000000..fbf1ad8
--- /dev/null
+++ b/MODULE.bazel
@@ -0,0 +1,12 @@
+###############################################################################
+# Bazel now uses Bzlmod by default to manage external dependencies.
+# Please consider migrating your external dependencies from WORKSPACE to MODULE.bazel.
+#
+# For more details, please check https://github.com/bazelbuild/bazel/issues/18958
+###############################################################################
+
+register_toolchains(
+    "//toolchains:i386_elf_gcc",
+)
+
+bazel_dep(name = "googletest", version = "1.14.0")
diff --git a/arch/i386/BUILD.bazel b/arch/i386/BUILD.bazel
new file mode 100644
index 0000000..2842a5b
--- /dev/null
+++ b/arch/i386/BUILD.bazel
@@ -0,0 +1,44 @@
+exports_files(
+    ["linker.ld"],
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "arch",
+    srcs = [
+        "boot.s",
+        "gdt.c",
+        "init.s",
+        "isr.c",
+        "lgdt.c",
+        "lidt.c",
+    ],
+    hdrs = [
+        "gdt.h",
+        "idt.h",
+        "paging.h",
+    ] + glob(["sys/*.h"]),
+    includes = ["."],
+    target_compatible_with = [
+        "@platforms//os:none",
+    ],
+    visibility = ["//visibility:public"],
+    deps = ["//lib/libk:k"],
+)
+
+# tests
+cc_test(
+    name = "test_gdt",
+    srcs = [
+        "gdt.c",
+        "gdt.h",
+        "test_gdt.cc",
+    ],
+    target_compatible_with = select({
+        "@platforms//os:none": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    }),
+    deps = [
+        "@googletest//:gtest_main",
+    ],
+)
diff --git a/i686/boot.s b/arch/i386/boot.s
index 40b0389..40b0389 100644
--- a/i686/boot.s
+++ b/arch/i386/boot.s
diff --git a/i686/gdt.c b/arch/i386/gdt.c
index 3148096..3148096 100644
--- a/i686/gdt.c
+++ b/arch/i386/gdt.c
diff --git a/i686/include/gdt.h b/arch/i386/gdt.h
index 2bdfb22..2bdfb22 100644
--- a/i686/include/gdt.h
+++ b/arch/i386/gdt.h
diff --git a/i686/include/idt.h b/arch/i386/idt.h
index ca39bde..ca39bde 100644
--- a/i686/include/idt.h
+++ b/arch/i386/idt.h
diff --git a/i686/init.s b/arch/i386/init.s
index ad329bb..ad329bb 100644
--- a/i686/init.s
+++ b/arch/i386/init.s
diff --git a/i686/isr.c b/arch/i386/isr.c
index acc2961..acc2961 100644
--- a/i686/isr.c
+++ b/arch/i386/isr.c
diff --git a/i686/lgdt.c b/arch/i386/lgdt.c
index 473a91d..473a91d 100644
--- a/i686/lgdt.c
+++ b/arch/i386/lgdt.c
diff --git a/i686/lidt.c b/arch/i386/lidt.c
index 86567f8..86567f8 100644
--- a/i686/lidt.c
+++ b/arch/i386/lidt.c
diff --git a/i686/linker.ld b/arch/i386/linker.ld
index 61a3be9..61a3be9 100644
--- a/i686/linker.ld
+++ b/arch/i386/linker.ld
diff --git a/i686/include/paging.h b/arch/i386/paging.h
index f5bfa78..f5bfa78 100644
--- a/i686/include/paging.h
+++ b/arch/i386/paging.h
diff --git a/i686/include/sys/control.h b/arch/i386/sys/control.h
index 89ab067..89ab067 100644
--- a/i686/include/sys/control.h
+++ b/arch/i386/sys/control.h
diff --git a/i686/include/sys/cpuid.h b/arch/i386/sys/cpuid.h
index 6613967..6613967 100644
--- a/i686/include/sys/cpuid.h
+++ b/arch/i386/sys/cpuid.h
diff --git a/i686/include/sys/io.h b/arch/i386/sys/io.h
index 4ff5d85..4ff5d85 100644
--- a/i686/include/sys/io.h
+++ b/arch/i386/sys/io.h
diff --git a/i686/include/sys/syscall.h b/arch/i386/sys/syscall.h
index 9e62c89..9e62c89 100644
--- a/i686/include/sys/syscall.h
+++ b/arch/i386/sys/syscall.h
diff --git a/i686/test_gdt.cc b/arch/i386/test_gdt.cc
index e437168..3501ae9 100644
--- a/i686/test_gdt.cc
+++ b/arch/i386/test_gdt.cc
@@ -1,7 +1,8 @@
 #include <gtest/gtest.h>
 
-#include "gdt.c"
+extern "C" {
 #include "gdt.h"
+}
 
 TEST(i686GDT, KnownAccessByteValues)
 {
diff --git a/config.mk b/config.mk
deleted file mode 100644
index 36fc32f..0000000
--- a/config.mk
+++ /dev/null
@@ -1,61 +0,0 @@
-#
-# Automatically generated file; DO NOT EDIT.
-# Main menu
-#
-
-#
-# Toolchain
-#
-CONFIG_ARCH_i686=y
-# CONFIG_ARCH_mips is not set
-CONFIG_TOOLCHAIN_i686_gcc=y
-CONFIG_CFLAGS="-g -Og"
-CONFIG_CXXFLAGS="-g -Og"
-CONFIG_LDFLAGS=""
-# end of Toolchain
-
-#
-# Devices
-#
-CONFIG_PIC_8259=y
-CONFIG_UART_16550=y
-CONFIG_VGA_TEXT_MODE=y
-CONFIG_KB_PS2=y
-# end of Devices
-
-## toolchain.mk
-ARCH=i686
-
-# define compiler, linker, archiver and strip and their flags
-${ARCH}_AS       := i686-elf-as
-
-${ARCH}_CC       := i686-elf-gcc -ansi
-${ARCH}_CCID     := $(shell ${${ARCH}_CC} --version | head -n1)
-${ARCH}_CFLAGS   := -Wall -Wextra -Wpedantic -Werror=shadow -Wconversion -fanalyzer \
-		    -D__ARCH__="${ARCH}" -ffreestanding -mgeneral-regs-only \
-		    $(shell echo ${CONFIG_CFLAGS})
-
-${ARCH}_LD       := i686-elf-ld
-${ARCH}_LDID     := $(shell ${${ARCH}_LD} --version | head -n1)
-${ARCH}_LDFLAGS  := -static -nostdlib \
-	            $(shell echo ${CONFIG_LDFLAGS})
-
-${ARCH}_AR       := i686-elf-ar
-${ARCH}_ARFLAGS  := -crus
-
-${ARCH}_STRIP    := i686-elf-strip
-
-# define compiler and flags for test targets
-HOST_CC       := gcc
-HOST_CFLAGS   := -Wall -Wextra -Wpedantic -Werror=shadow -Wconversion \
-		 ${CFLAGS}
-HOST_CXX      := g++
-HOST_CXXFLAGS := -Wall -Wextra -Wpedantic -Werror=shadow -Wconversion -g -Og \
-		 $(shell pkg-config --cflags gtest gtest_main gmock) \
-		 ${CXXFLAGS}
-
-HOST_LDFLAGS  := $(shell pkg-config --libs gtest gtest_main gmock)
-
-# emulator name and flags
-QEMU     := qemu-system-i386 -accel kvm -machine pc
-
diff --git a/devices/BUILD.bazel b/devices/BUILD.bazel
new file mode 100644
index 0000000..0c58d48
--- /dev/null
+++ b/devices/BUILD.bazel
@@ -0,0 +1,22 @@
+cc_library(
+    name = "drivers",
+    srcs = [
+        "i8042.c",
+        "mouse.c",
+        "pckbd.c",
+        "pic_8259.c",
+        "uart/uart_16550.c",
+        "uart/uart_16550.h",
+        "vga.c",
+    ],
+    hdrs = glob(["include/*.h"]),
+    defines = [
+        "__ARCH__=i386",
+    ],
+    includes = ["include"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//arch/i386:arch",
+        "//lib/libk:k",
+    ],
+)
diff --git a/devices/meson.build b/devices/meson.build
deleted file mode 100644
index d6f4739..0000000
--- a/devices/meson.build
+++ /dev/null
@@ -1,27 +0,0 @@
-devs_srcs = files(
-  'pic_8259.c',
-  'uart/uart_16550.c',
-  'vga.c',
-  'i8042.c',
-  'pckbd.c',
-  'mouse.c',
-)
-devs_incl = include_directories('include')
-
-devs = declare_dependency(
-  link_with: static_library('devs', devs_srcs,
-    include_directories: devs_incl,
-    dependencies: [ libk, i686 ],
-  ),
-  include_directories: devs_incl,
-)
-
-# tests
-test('uart_16550',
-  executable('test_uart_16550', 'uart/uart_16550.c', 'uart/unittest_uart_16550.cc',
-    include_directories: devs_incl,
-    dependencies: [ gtest, gmock ],
-    native: true),
-  suite: 'dev'
-)
-
diff --git a/grub/BUILD.bazel b/grub/BUILD.bazel
new file mode 100644
index 0000000..2d12cc1
--- /dev/null
+++ b/grub/BUILD.bazel
@@ -0,0 +1,9 @@
+package(default_visibility = ["//visibility:public"])
+
+exports_files(["grub.cfg"])
+
+cc_library(
+    name = "multiboot2",
+    hdrs = ["include/multiboot2.h"],
+    includes = ["include"],
+)
diff --git a/grub/multiboot2.h b/grub/include/multiboot2.h
index 5a3db5a..5a3db5a 100644
--- a/grub/multiboot2.h
+++ b/grub/include/multiboot2.h
diff --git a/grub/meson.build b/grub/meson.build
deleted file mode 100644
index 917f8d7..0000000
--- a/grub/meson.build
+++ /dev/null
@@ -1,2 +0,0 @@
-grub_incl = include_directories('.', is_system: true)
-
diff --git a/i686/meson.build b/i686/meson.build
deleted file mode 100644
index 21ff729..0000000
--- a/i686/meson.build
+++ /dev/null
@@ -1,24 +0,0 @@
-
-i686_srcs = files(
-  'boot.s', 'init.s',
-  'gdt.c', 'lgdt.c',
-  'lidt.c', 'isr.c',
-)
-i686_incl = include_directories('include')
-
-i686 = declare_dependency(
-  link_with: static_library('i686', i686_srcs,
-    include_directories: i686_incl,
-    dependencies: libk
-  ),
-  include_directories: i686_incl,
-)
-
-# tests
-test('GDT',
-  executable('test_gdt', 'test_gdt.cc',
-    include_directories: i686_incl,
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'i686'
-)
diff --git a/kernel/BUILD.bazel b/kernel/BUILD.bazel
new file mode 100644
index 0000000..e7ed087
--- /dev/null
+++ b/kernel/BUILD.bazel
@@ -0,0 +1,37 @@
+load("//tools:configure_file.bzl", "configure_file")
+
+configure_file(
+    name = "conf",
+    template = "conf.h.in",
+)
+
+cc_binary(
+    name = "glitch.elf",
+    srcs = [
+        "boot.h",
+        "kernel.c",
+        "mem.h",
+        "mem/vmm.c",
+        "mmap.c",
+        "mmap.h",
+        "multiboot2.c",
+        "task.h",
+        ":conf.h",
+    ],
+    includes = ["."],
+    linkopts = [
+        "-T",
+        "$(location //arch/i386:linker.ld)",
+    ],
+    target_compatible_with = [
+        "@platforms//os:none",
+    ],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//arch/i386:arch",
+        "//arch/i386:linker.ld",
+        "//devices:drivers",
+        "//grub:multiboot2",
+        "//lib/libk:k",
+    ],
+)
diff --git a/src/boot.h b/kernel/boot.h
index 646fb4c..646fb4c 100644
--- a/src/boot.h
+++ b/kernel/boot.h
diff --git a/kernel/conf.h.in b/kernel/conf.h.in
new file mode 100644
index 0000000..61352d7
--- /dev/null
+++ b/kernel/conf.h.in
@@ -0,0 +1,4 @@
+#pragma once
+
+#define VERSION {VERSION}
+#define CC {CC}
diff --git a/src/kernel.c b/kernel/kernel.c
index 98269c1..98269c1 100644
--- a/src/kernel.c
+++ b/kernel/kernel.c
diff --git a/src/mem.h b/kernel/mem.h
index e06dd21..e06dd21 100644
--- a/src/mem.h
+++ b/kernel/mem.h
diff --git a/src/mem/vmm.c b/kernel/mem/vmm.c
index a07dd72..a07dd72 100644
--- a/src/mem/vmm.c
+++ b/kernel/mem/vmm.c
diff --git a/src/mmap.c b/kernel/mmap.c
index e5d4be6..e5d4be6 100644
--- a/src/mmap.c
+++ b/kernel/mmap.c
diff --git a/src/mmap.h b/kernel/mmap.h
index 13f40f2..13f40f2 100644
--- a/src/mmap.h
+++ b/kernel/mmap.h
diff --git a/src/multiboot2.c b/kernel/multiboot2.c
index bd6250f..bd6250f 100644
--- a/src/multiboot2.c
+++ b/kernel/multiboot2.c
diff --git a/src/sched.hpp b/kernel/sched.hpp
index cfa3ff0..cfa3ff0 100644
--- a/src/sched.hpp
+++ b/kernel/sched.hpp
diff --git a/src/sched/roundrobin.cpp b/kernel/sched/roundrobin.cpp
index c3d6cb6..c3d6cb6 100644
--- a/src/sched/roundrobin.cpp
+++ b/kernel/sched/roundrobin.cpp
diff --git a/src/sched/test_roundrobin.cc b/kernel/sched/test_roundrobin.cc
index 89f60bf..89f60bf 100644
--- a/src/sched/test_roundrobin.cc
+++ b/kernel/sched/test_roundrobin.cc
diff --git a/src/sched/test_taskqueue.cc b/kernel/sched/test_taskqueue.cc
index 217c44d..217c44d 100644
--- a/src/sched/test_taskqueue.cc
+++ b/kernel/sched/test_taskqueue.cc
diff --git a/src/task.h b/kernel/task.h
index 0d59bb1..0d59bb1 100644
--- a/src/task.h
+++ b/kernel/task.h
diff --git a/lib/blake2/BUILD.bazel b/lib/blake2/BUILD.bazel
new file mode 100644
index 0000000..4723ae6
--- /dev/null
+++ b/lib/blake2/BUILD.bazel
@@ -0,0 +1,28 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "blake2s",
+    srcs = ["blake2s.c"],
+    hdrs = ["include/blake2s.h"],
+    includes = ["include"],
+    deps = select({
+        "@platforms//os:none": ["//lib/libk:k"],
+        "//conditions:default": [],
+    }),
+)
+
+cc_test(
+    name = "test_blake2s",
+    srcs = [
+        "blake2s_kat.h",
+        "blake2s_selftest.cc",
+    ],
+    target_compatible_with = select({
+        "@platforms//os:none": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    }),
+    deps = [
+        "//lib/blake2:blake2s",
+        "@googletest//:gtest_main",
+    ],
+)
diff --git a/lib/blake2/tests/blake2s_kat.h b/lib/blake2/blake2s_kat.h
index dec250a..dec250a 100644
--- a/lib/blake2/tests/blake2s_kat.h
+++ b/lib/blake2/blake2s_kat.h
diff --git a/lib/blake2/tests/blake2s_selftest.cc b/lib/blake2/blake2s_selftest.cc
index 420544d..420544d 100644
--- a/lib/blake2/tests/blake2s_selftest.cc
+++ b/lib/blake2/blake2s_selftest.cc
diff --git a/lib/blake2/meson.build b/lib/blake2/meson.build
deleted file mode 100644
index dc06f3e..0000000
--- a/lib/blake2/meson.build
+++ /dev/null
@@ -1,24 +0,0 @@
-
-blake2s_srcs = files('blake2s.c')
-blake2s_incl = include_directories('include')
-
-blake2s = declare_dependency(
-  link_with: static_library('blake2s', blake2s_srcs,
-    include_directories: blake2s_incl,
-    dependencies: libk),
-  include_directories: blake2s_incl,
-)
-
-# tests
-blake2s_sut = declare_dependency(
-  link_with: library('blake2s_sut', blake2s_srcs,
-    include_directories: blake2s_incl,
-    native: true),
-  include_directories: blake2s_incl,
-)
-
-test('blake2s selftest',
-  executable('test_blake2s_selftest', 'tests/blake2s_selftest.cc',
-    dependencies: [ blake2s_sut, gtest ],
-    native: true)
-)
diff --git a/lib/libk/BUILD.bazel b/lib/libk/BUILD.bazel
new file mode 100644
index 0000000..51b4c1b
--- /dev/null
+++ b/lib/libk/BUILD.bazel
@@ -0,0 +1,80 @@
+filegroup(
+    name = "k_srcs",
+    srcs = [
+        "endian/little.c",
+        "stdio/fprintf.c",
+        "stdio/printf.c",
+        "stdio/vfprintf.c",
+        "stdlib/linked_list_allocator.c",
+        "stdlib/memcpy.c",
+        "stdlib/memset.c",
+        "string/itoa.c",
+    ],
+)
+
+cc_library(
+    name = "k",
+    srcs = [":k_srcs"],
+    hdrs = glob(["include/*.h"]),
+    includes = ["include"],
+    target_compatible_with = [
+        "@platforms//os:none",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+# tests
+cc_library(
+    name = "k_sut",
+    includes = ["."],
+    target_compatible_with = select({
+        "@platforms//os:none": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    }),
+    textual_hdrs = [":k_srcs"],
+)
+
+cc_test(
+    name = "test_endian_little",
+    srcs = [
+        "endian/test_endian_little.cc",
+    ],
+    deps = [
+        ":k_sut",
+        "@googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "test_linked_list_allocator",
+    srcs = [
+        "stdlib/test_allocator.hh",
+        "stdlib/test_linked_list_allocator.cc",
+    ],
+    deps = [
+        ":k_sut",
+        "@googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "test_mem",
+    srcs = [
+        "stdlib/test_mem.cc",
+    ],
+    deps = [
+        ":k_sut",
+        "@googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "test_string",
+    srcs = [
+        "string/test_string.cc",
+    ],
+    deps = [
+        ":k_sut",
+        "@googletest//:gtest_main",
+    ],
+)
diff --git a/lib/libk/meson.build b/lib/libk/meson.build
deleted file mode 100644
index 669780b..0000000
--- a/lib/libk/meson.build
+++ /dev/null
@@ -1,41 +0,0 @@
-
-libk_srcs = files(
-  'endian/little.c',
-  'stdio/printf.c', 'stdio/fprintf.c', 'stdio/vfprintf.c',
-  'stdlib/memcpy.c', 'stdlib/memset.c', 'stdlib/linked_list_allocator.c',
-  'string/itoa.c')
-libk_incl = include_directories('include')
-
-libk = declare_dependency(
-  link_with: static_library('k', libk_srcs, include_directories: libk_incl),
-  include_directories: libk_incl,
-)
-
-# tests
-test('endian little',
-  executable('test_endian_little', 'endian/test_endian_little.cc',
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'libk'
-)
-
-test('linked list allocator',
-  executable('test_linked_list_allocator', 'stdlib/test_linked_list_allocator.cc',
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'libk'
-)
-
-test('mem',
-  executable('test_mem', 'stdlib/test_mem.cc',
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'libk'
-)
-
-test('string',
-  executable('test_string', 'string/test_string.cc',
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'libk'
-)
diff --git a/meson.build b/meson.build
deleted file mode 100644
index b5c6763..0000000
--- a/meson.build
+++ /dev/null
@@ -1,39 +0,0 @@
-project('glitch', ['c', 'cpp'],
-  version: '0.1.0',
-  default_options: {
-    'c_std': 'c89',
-    'cpp_std': 'c++20',
-    'warning_level': '3',
-    'buildtype': 'plain',
-    'b_staticpic': false,
-  }
-)
-
-# meson includes
-subdir('meson/compiler_flags')
-
-# common dependencies
-pymod = import('python')
-python = pymod.find_installation()
-qemu_i386 = find_program('qemu-system-i386')
-gtest = dependency('gtest', main: true, native: true, disabler: true)
-gmock = dependency('gmock', native: true, disabler: true)
-
-# components
-subdir('grub')
-subdir('lib/libk')
-subdir('lib/blake2')
-subdir('i686')
-subdir('devices')
-subdir('src')
-
-glitch_iso = custom_target('glitch.iso',
-  input: ['tools/make_iso.py', 'grub/grub.cfg', glitch_elf],
-  output: 'glitch.iso',
-  command: [python, '@INPUT0@', '-c=@INPUT1@', '-k=@INPUT2@', '-o=@OUTPUT@'],
-)
-
-run_target('run_i686',
-  command: [qemu_i386, '-accel', 'kvm', '-machine', 'pc', '-cdrom', glitch_iso,
-    '-d', 'cpu_reset', '-display', 'gtk,zoom-to-fit=on'],
-)
diff --git a/meson/compiler_flags/meson.build b/meson/compiler_flags/meson.build
deleted file mode 100644
index f159eb4..0000000
--- a/meson/compiler_flags/meson.build
+++ /dev/null
@@ -1,34 +0,0 @@
-# global compiler settings
-common_compiler_flags = [
-  '-Wshadow',
-  '-Wunused', '-Wunused-parameter',
-  '-Wmisleading-indentation',
-  '-Wundef',
-  '-Wuninitialized',
-  # casts
-  '-Wcast-align',      # performance problem casts
-  '-Wcast-qual',
-  # conversion
-  '-Wconversion',       # type conversion may lose data
-  '-Wsign-conversion',  # sign conversion
-  '-Wdouble-promotion', # implicit float to double
-  # pointers
-  '-Wpointer-arith',
-  '-Wnull-dereference',
-]
-c_compiler_flags = [
-  '-fanalyzer',
-]
-cpp_compiler_flags = [
-  '-Weffc++',
-  # inheritance
-  '-Wnon-virtual-dtor',   # class with virtual functions has non-virt dtor
-  '-Woverloaded-virtual', # overloaded (not override) virtual function
-  # casts
-  '-Wold-style-cast',  # C-style casts
-]
-add_project_arguments(common_compiler_flags, c_compiler_flags, language: 'c')
-add_project_arguments(common_compiler_flags, cpp_compiler_flags, language: 'cpp')
-add_project_arguments('-D__ARCH__=i686', language: 'c', native: false)
-
-subdir_done()
diff --git a/platforms/BUILD.bazel b/platforms/BUILD.bazel
new file mode 100644
index 0000000..1f13594
--- /dev/null
+++ b/platforms/BUILD.bazel
@@ -0,0 +1,7 @@
+platform(
+    name = "i386",
+    constraint_values = [
+        "@platforms//cpu:i386",
+        "@platforms//os:none",
+    ],
+)
diff --git a/project_config.bzl b/project_config.bzl
new file mode 100644
index 0000000..a4c58fb
--- /dev/null
+++ b/project_config.bzl
@@ -0,0 +1,2 @@
+def version():
+    return "0.1.0"
diff --git a/src/meson.build b/src/meson.build
deleted file mode 100644
index 881dffa..0000000
--- a/src/meson.build
+++ /dev/null
@@ -1,36 +0,0 @@
-
-# generated files
-conf_h = configure_file(
-  #input: 'conf.h.in',
-  output: 'conf.h',
-  configuration: {
-    'VERSION': '"@0@"'.format(meson.project_version()),
-    'CC': '"@0@-@1@"'.format(meson.get_compiler('c').version(),
-                             meson.get_compiler('c').get_id()),
-  }
-)
-
-kernel_srcs = files('multiboot2.c', 'mmap.c', 'kernel.c', 'mem/vmm.c')
-kernel_incl = include_directories('.')
-
-glitch_elf = executable('glitch.elf', kernel_srcs,
-  include_directories: [ kernel_incl, grub_incl ],
-  dependencies: [ libk, devs, i686 ],
-  link_args: [ '-static', '-nostdlib', '-T', '../i686/linker.ld' ],
-)
-
-# tests
-test('taskqueue',
-  executable('test_taskqueue', 'sched/test_taskqueue.cc',
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'kernel'
-)
-
-test('roundrobin',
-  executable('test_roundrobin', 'sched/test_roundrobin.cc',
-    dependencies: [ gtest ],
-    native: true),
-  suite: 'kernel'
-)
-
diff --git a/toolchains/BUILD.bazel b/toolchains/BUILD.bazel
new file mode 100644
index 0000000..d46f812
--- /dev/null
+++ b/toolchains/BUILD.bazel
@@ -0,0 +1,34 @@
+load(":i386_elf_gcc.bzl", "cc_toolchain_config")
+
+package(default_visibility = ["//visibility:public"])
+
+filegroup(name = "empty")
+
+cc_toolchain_config(name = "i386_elf_gcc_toolchain_config")
+
+cc_toolchain(
+    name = "i386_elf_gcc_toolchain",
+    all_files = ":empty",
+    compiler_files = ":empty",
+    dwp_files = ":empty",
+    linker_files = ":empty",
+    objcopy_files = ":empty",
+    strip_files = ":empty",
+    supports_param_files = 0,
+    toolchain_config = ":i386_elf_gcc_toolchain_config",
+    toolchain_identifier = "none_i386-toolchain",
+)
+
+toolchain(
+    name = "i386_elf_gcc",
+    exec_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:linux",
+    ],
+    target_compatible_with = [
+        "@platforms//cpu:i386",
+        "@platforms//os:none",
+    ],
+    toolchain = ":i386_elf_gcc_toolchain",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/toolchains/i386_elf_gcc.bzl b/toolchains/i386_elf_gcc.bzl
new file mode 100644
index 0000000..ad933d2
--- /dev/null
+++ b/toolchains/i386_elf_gcc.bzl
@@ -0,0 +1,123 @@
+load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
+load(
+    "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+    "feature",
+    "flag_group",
+    "flag_set",
+    "tool_path",
+)
+
+all_link_actions = [
+    ACTION_NAMES.cpp_link_executable,
+    ACTION_NAMES.cpp_link_dynamic_library,
+    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+]
+
+all_compile_actions = [
+    ACTION_NAMES.assemble,
+    ACTION_NAMES.c_compile,
+    ACTION_NAMES.clif_match,
+    ACTION_NAMES.cpp_compile,
+    ACTION_NAMES.cpp_header_parsing,
+    ACTION_NAMES.cpp_module_codegen,
+    ACTION_NAMES.cpp_module_compile,
+    ACTION_NAMES.linkstamp_compile,
+    ACTION_NAMES.lto_backend,
+    ACTION_NAMES.preprocess_assemble,
+]
+
+def _impl(ctx):
+    tool_paths = [
+        tool_path(
+            name = "gcc",
+            path = "/usr/bin/i686-elf-gcc",
+        ),
+        tool_path(
+            name = "ld",
+            path = "/usr/bin/i686-elf-ld",
+        ),
+        tool_path(
+            name = "ar",
+            path = "/usr/bin/i686-elf-ar",
+        ),
+        tool_path(
+            name = "cpp",
+            path = "/usr/bin/i686-elf-cpp",
+        ),
+        tool_path(
+            name = "gcov",
+            path = "/bin/false",
+        ),
+        tool_path(
+            name = "nm",
+            path = "/usr/bin/i686-elf-nm",
+        ),
+        tool_path(
+            name = "objdump",
+            path = "/usr/bin/i686-elf-objdump",
+        ),
+        tool_path(
+            name = "strip",
+            path = "/usr/bin/i686-elf-strip",
+        ),
+    ]
+
+    features = [
+        feature(
+            name = "default_compiler_flags",
+            enabled = True,
+            flag_sets = [
+                flag_set(
+                    actions = all_compile_actions,
+                    flag_groups = [
+                        flag_group(
+                            flags = [
+                                "-fanalyzer",
+                                "-ffreestanding",
+                                "-mgeneral-regs-only",
+                            ],
+                        ),
+                    ],
+                ),
+            ],
+        ),
+        feature(
+            name = "default_linker_flags",
+            enabled = True,
+            flag_sets = [
+                flag_set(
+                    actions = all_link_actions,
+                    flag_groups = ([
+                        flag_group(
+                            flags = [
+                                "-nostdlib",
+                            ],
+                        ),
+                    ]),
+                ),
+            ],
+        ),
+    ]
+
+    return cc_common.create_cc_toolchain_config_info(
+        ctx = ctx,
+        features = features,
+        cxx_builtin_include_directories = [
+            "/usr/lib/gcc/i686-elf",
+        ],
+        toolchain_identifier = "local",
+        host_system_name = "local",
+        target_system_name = "local",
+        target_cpu = "i686",
+        target_libc = "unknown",
+        compiler = "gcc",
+        abi_version = "unknown",
+        abi_libc_version = "unknown",
+        tool_paths = tool_paths,
+    )
+
+cc_toolchain_config = rule(
+    implementation = _impl,
+    attrs = {},
+    provides = [CcToolchainConfigInfo],
+)
diff --git a/toolchains/i386_qemu.bzl b/toolchains/i386_qemu.bzl
new file mode 100644
index 0000000..c9f8535
--- /dev/null
+++ b/toolchains/i386_qemu.bzl
@@ -0,0 +1,8 @@
+_wrapper_template = """\
+#!/bin/bash
+qemu-system-i386 -accel kvm -machine pc -d cpu_reset -display gtk,zoom-to-fit=on -cdrom {cdrom}
+"""
+
+def qemu_wrapper():
+    return _wrapper_template
+
diff --git a/tools/BUILD.bazel b/tools/BUILD.bazel
new file mode 100644
index 0000000..fddb974
--- /dev/null
+++ b/tools/BUILD.bazel
@@ -0,0 +1,6 @@
+package(default_visibility = ["//visibility:public"])
+
+py_binary(
+    name = "make_iso",
+    srcs = ["make_iso.py"],
+)
diff --git a/tools/configure_file.bzl b/tools/configure_file.bzl
new file mode 100644
index 0000000..8fdd75c
--- /dev/null
+++ b/tools/configure_file.bzl
@@ -0,0 +1,29 @@
+load("//:project_config.bzl", "version")
+load("@rules_cc//cc:find_cc_toolchain.bzl", "find_cc_toolchain", "use_cc_toolchain")
+
+def configure_file(**kwargs):
+    _configure_file(
+        source_file = "{name}.h".format(**kwargs),
+        **kwargs
+    )
+
+def _configure_file_impl(ctx):
+    cc_toolchain = find_cc_toolchain(ctx)
+
+    ctx.actions.expand_template(
+        template = ctx.file.template,
+        output = ctx.outputs.source_file,
+        substitutions = {
+            "{VERSION}": '"{}"'.format(version()),
+            "{CC}": '"{} " __VERSION__'.format(cc_toolchain.compiler),
+        },
+    )
+
+_configure_file = rule(
+    attrs = {
+        "template": attr.label(allow_single_file = True),
+        "source_file": attr.output(mandatory = True),
+    },
+    toolchains = use_cc_toolchain(),
+    implementation = _configure_file_impl,
+)
diff --git a/tools/make_iso.bzl b/tools/make_iso.bzl
new file mode 100644
index 0000000..5ff20f5
--- /dev/null
+++ b/tools/make_iso.bzl
@@ -0,0 +1,41 @@
+def make_iso(**kwargs):
+    _make_iso(
+        image = "{name}.iso".format(**kwargs),
+        **kwargs
+    )
+
+def _make_iso_impl(ctx):
+    inputs = []
+    outputs = []
+    args = ctx.actions.args()
+
+    args.add("-c", ctx.file.bootloader.path)
+    inputs.append(ctx.file.bootloader)
+    args.add("-k", ctx.file.kernel.path)
+    inputs.append(ctx.file.kernel)
+
+    args.add("-o", ctx.outputs.image.path)
+    outputs.append(ctx.outputs.image)
+
+    ctx.actions.run(
+        inputs = inputs,
+        outputs = outputs,
+        arguments = [args],
+        executable = ctx.executable._generator,
+        progress_message = "Generating ISO image %s" % ctx.label.name,
+    )
+
+_make_iso = rule(
+    attrs = {
+        "bootloader": attr.label(allow_single_file = True),
+        "kernel": attr.label(allow_single_file = True),
+        "image": attr.output(),
+        "_generator": attr.label(
+            default = Label(":make_iso"),
+            executable = True,
+            allow_files = True,
+            cfg = "exec",
+        ),
+    },
+    implementation = _make_iso_impl,
+)
diff --git a/tools/qemu.bzl b/tools/qemu.bzl
new file mode 100644
index 0000000..9493306
--- /dev/null
+++ b/tools/qemu.bzl
@@ -0,0 +1,33 @@
+load("//toolchains:i386_qemu.bzl", qemu_i386 = "qemu_wrapper")
+
+def qemu(**kwargs):
+    _qemu(
+        wrapper_content = select({
+            "@platforms//cpu:i386": qemu_i386(),
+            "//conditions:default": "/bin/false",
+        }),
+        **kwargs
+    )
+
+def _qemu_impl(ctx):
+    print(ctx)
+    print(ctx.attr)
+
+    wrapper = ctx.actions.declare_file("%s_wrapper" % ctx.label.name)
+    wrapper_content = ctx.attr.wrapper_content.format(
+        cdrom = ctx.file.cdrom.basename,
+    )
+    ctx.actions.write(wrapper, wrapper_content, is_executable = True)
+
+    runfiles = ctx.runfiles(files = [ctx.file.cdrom])
+
+    return [DefaultInfo(executable = wrapper, runfiles = runfiles)]
+
+_qemu = rule(
+    implementation = _qemu_impl,
+    attrs = {
+        "cdrom": attr.label(allow_single_file = True),
+        "wrapper_content": attr.string(),
+    },
+    executable = True,
+)