2 # Copyright (c) 2005 Martin Decky
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
9 # - Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
11 # - Redistributions in binary form must reproduce the above copyright
12 # notice, this list of conditions and the following disclaimer in the
13 # documentation and/or other materials provided with the distribution.
14 # - The name of the author may not be used to endorse or promote products
15 # derived from this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 subdir('arch' / KARCH)
35 # Defines genarch_src.
38 # Defines generic_src, instrumentable_src.
44 kernel_include_dirs = include_directories(
47 'arch' / KARCH / 'include',
48 '..' / 'abi' / 'arch' / KARCH / 'include',
49 '..' / 'abi' / 'include',
50 '..' / 'common' / 'include',
55 '-imacros', meson.build_root() / 'config.h',
58 '-DHELENOS_RELEASE=' + HELENOS_RELEASE,
59 '-DHELENOS_COPYRIGHT=' + HELENOS_COPYRIGHT,
60 '-DHELENOS_CODENAME=' + HELENOS_CODENAME,
61 '-D__@0@_BITS__'.format(meson.get_cross_property('bits')),
64 # Preprocess linker script using C preprocessor.
65 kernel_ldscript = custom_target('_link.ld',
66 input: 'arch' / KARCH / '_link.ld.in',
72 '-I' + meson.current_source_dir() / 'arch' / KARCH / 'include',
81 build_by_default: true,
84 kernel_link_args = arch_kernel_link_args + [
86 '-T', meson.current_build_dir() / '_link.ld',
88 # The kernel is built as ELF but then copied as a blob of bytes and
89 # the permissions are not relevant anyway (needed for binutils 2.39+).
90 kernel_link_args += ldflags_ignore_rwx_segments
93 kernel_link_args += [ '-flto' ]
96 kernel_c_args = arch_kernel_c_args + kernel_defs + [
98 '-fdebug-prefix-map=../../kernel/=',
99 '-fdebug-prefix-map=../../../kernel/=',
101 cc.get_supported_arguments([
102 # TODO: remove this flag
103 '-Wno-cast-function-type',
105 # When accessing specific memory addresses that are below
106 # normal page size, the compiler may assume that we actually
107 # dereferenced NULL pointer and warns us about that.
108 # But in kernel we often need to access these addresses
109 # directly hence we need to ignore these warnings.
111 # TODO: might make more sense to disable this selectively
112 # in specific files (or better yet, for specific lines).
113 '--param=min-pagesize=0',
117 if not CONFIG_LINE_DEBUG
118 # Keep the debug info needed to get file names for kernel stack traces.
119 kernel_c_args += [ '-gdwarf-5', '-g1', '-gno-statement-frontiers' ]
123 kernel_c_args += [ '-flto' ]
126 if cc.get_id() == 'clang'
128 '-fno-stack-protector',
130 '-mllvm', '-asm-macro-max-nesting-depth=1000',
134 instrumentables = static_library('instrumentables', instrumentable_src,
135 include_directories: kernel_include_dirs,
136 implicit_include_directories: false,
137 c_args: kernel_c_args + (CONFIG_TRACE ? [ '-finstrument-functions' ] : []),
141 noninstrumentables = static_library('noninstrumentables', arch_src, genarch_src, generic_src, test_src,
142 include_directories: kernel_include_dirs,
143 implicit_include_directories: false,
144 c_args: kernel_c_args,
148 all_kernel_objects = [ instrumentables, noninstrumentables ]
150 kernel_name = 'kernel.elf'
151 kernel_map_name = kernel_name + '.map'
152 kernel_map_path = meson.current_build_dir() / kernel_map_name
154 kernel_elf = executable(kernel_name,
155 include_directories: kernel_include_dirs,
156 implicit_include_directories: false,
157 c_args: kernel_c_args,
158 link_args: kernel_c_args + kernel_link_args + [
159 '-Wl,-Map,' + kernel_map_path,
161 link_depends: kernel_ldscript,
162 link_whole: all_kernel_objects,
166 kernel_dbg = custom_target('kernel.dbg',
167 output: 'kernel.dbg',
177 kernel_elf_stripped = custom_target(kernel_name + '.stripped',
178 output: kernel_name + '.stripped',
188 rd_init_binaries += [[ kernel_elf_stripped, 'boot/kernel.elf' ]]
189 install_files += [[ 'boot', kernel_elf_stripped.full_path(), 'kernel.elf' ]]
190 install_deps += [ kernel_elf_stripped ]
193 rd_init_binaries += [[ kernel_dbg, 'kernel.dbg' ]]
194 install_files += [[ 'boot', kernel_dbg.full_path(), 'kernel.dbg' ]]
195 install_deps += [ kernel_dbg ]
198 kernel_disasm = custom_target('kernel.elf.disasm',
199 command: [ objdump, '-S', '@INPUT@' ],
201 output: 'kernel.elf.disasm',
203 build_by_default: true,
206 # TODO: Add configuration option for installing debug files
208 install_files += [[ 'boot', kernel_disasm.full_path(), 'kernel.elf.disasm' ]]
209 install_deps += [ kernel_disasm ]