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# SPDX-License-Identifier: LGPL-2.1-or-later
conf.set10('ENABLE_EFI', get_option('efi'))
conf.set10('HAVE_GNU_EFI', false)
efi_config_h_dir = meson.current_build_dir()
if not get_option('efi') or get_option('gnu-efi') == 'false'
if get_option('gnu-efi') == 'true'
error('gnu-efi support requested, but general efi support is disabled')
endif
subdir_done()
endif
efi_arch = host_machine.cpu_family()
if efi_arch == 'x86' and '-m64' in get_option('efi-cflags')
efi_arch = 'x86_64'
elif efi_arch == 'x86_64' and '-m32' in get_option('efi-cflags')
efi_arch = 'x86'
endif
efi_arch = {
# host_cc_arch: [efi_arch (see Table 3-2 in UEFI spec), obsolete gnu_efi_inc_arch]
'x86': ['ia32', 'ia32'],
'x86_64': ['x64', 'x86_64'],
'arm': ['arm', 'arm'],
'aarch64': ['aa64', 'aarch64'],
'riscv64': ['riscv64', 'riscv64'],
}.get(efi_arch, [])
efi_incdir = get_option('efi-includedir')
found = false
foreach efi_arch_candidate : efi_arch
efi_archdir = efi_incdir / efi_arch_candidate
if cc.has_header(efi_archdir / 'efibind.h',
args: get_option('efi-cflags'))
found = true
break
endif
endforeach
if not found
if get_option('gnu-efi') == 'true'
error('gnu-efi support requested, but headers not found or efi arch is unknown')
endif
warning('gnu-efi headers not found or efi arch is unknown, disabling gnu-efi support')
subdir_done()
endif
if not cc.has_header_symbol('efi.h', 'EFI_IMAGE_MACHINE_X64',
args: ['-nostdlib', '-ffreestanding', '-fshort-wchar'] + get_option('efi-cflags'),
include_directories: include_directories(efi_incdir,
efi_archdir))
if get_option('gnu-efi') == 'true'
error('gnu-efi support requested, but found headers are too old (3.0.5+ required)')
endif
warning('gnu-efi headers are too old (3.0.5+ required), disabling gnu-efi support')
subdir_done()
endif
objcopy = run_command(cc.cmd_array(), '-print-prog-name=objcopy', check: true).stdout().strip()
objcopy_2_38 = find_program('objcopy', version: '>=2.38', required: false)
efi_ld = get_option('efi-ld')
if efi_ld == 'auto'
efi_ld = cc.get_linker_id().split('.')[1]
if efi_ld not in ['bfd', 'gold']
message('Not using @0@ as efi-ld, falling back to bfd'.format(efi_ld))
efi_ld = 'bfd'
endif
endif
efi_multilib = run_command(
cc.cmd_array(), '-print-multi-os-directory', get_option('efi-cflags'),
check: false
).stdout().strip()
efi_multilib = run_command(
'realpath', '-e', '/usr/lib' / efi_multilib,
check: false
).stdout().strip()
efi_libdir = ''
foreach dir : [get_option('efi-libdir'),
'/usr/lib/gnuefi' / efi_arch[0],
efi_multilib]
if dir != '' and fs.is_dir(dir)
efi_libdir = dir
break
endif
endforeach
if efi_libdir == ''
if get_option('gnu-efi') == 'true'
error('gnu-efi support requested, but efi-libdir was not found')
endif
warning('efi-libdir was not found, disabling gnu-efi support')
subdir_done()
endif
efi_lds = ''
foreach location : [ # New locations first introduced with gnu-efi 3.0.11
[efi_libdir / 'efi.lds',
efi_libdir / 'crt0.o'],
# Older locations...
[efi_libdir / 'gnuefi' / 'elf_@0@_efi.lds'.format(efi_arch[1]),
efi_libdir / 'gnuefi' / 'crt0-efi-@0@.o'.format(efi_arch[1])],
[efi_libdir / 'elf_@0@_efi.lds'.format(efi_arch[1]),
efi_libdir / 'crt0-efi-@0@.o'.format(efi_arch[1])]]
if fs.is_file(location[0]) and fs.is_file(location[1])
efi_lds = location[0]
efi_crt0 = location[1]
break
endif
endforeach
if efi_lds == ''
if get_option('gnu-efi') == 'true'
error('gnu-efi support requested, but cannot find efi.lds')
endif
warning('efi.lds was not found, disabling gnu-efi support')
subdir_done()
endif
conf.set10('HAVE_GNU_EFI', true)
conf.set_quoted('EFI_MACHINE_TYPE_NAME', efi_arch[0])
efi_conf = configuration_data()
efi_conf.set_quoted('EFI_MACHINE_TYPE_NAME', efi_arch[0])
efi_conf.set10('ENABLE_TPM', get_option('tpm'))
foreach ctype : ['color-normal', 'color-entry', 'color-highlight', 'color-edit']
c = get_option('efi-' + ctype).split(',')
efi_conf.set(ctype.underscorify().to_upper(), 'EFI_TEXT_ATTR(@0@, @1@)'.format(
'EFI_' + c[0].strip().underscorify().to_upper(),
'EFI_' + c[1].strip().underscorify().to_upper()))
endforeach
if meson.is_cross_build() and get_option('sbat-distro') == 'auto'
warning('Auto detection of SBAT information not supported when cross-building, disabling SBAT.')
elif get_option('sbat-distro') != ''
efi_conf.set_quoted('SBAT_PROJECT', meson.project_name())
efi_conf.set_quoted('PROJECT_VERSION', meson.project_version())
efi_conf.set('PROJECT_URL', conf.get('PROJECT_URL'))
if get_option('sbat-distro-generation') < 1
error('SBAT Distro Generation must be a positive integer')
endif
efi_conf.set('SBAT_DISTRO_GENERATION', get_option('sbat-distro-generation'))
foreach sbatvar : [['sbat-distro', 'ID'],
['sbat-distro-summary', 'NAME'],
['sbat-distro-url', 'BUG_REPORT_URL']]
value = get_option(sbatvar[0])
if (value == '' or value == 'auto') and not meson.is_cross_build()
cmd = 'if [ -e /etc/os-release ]; then . /etc/os-release; else . /usr/lib/os-release; fi; echo $@0@'.format(sbatvar[1])
value = run_command(sh, '-c', cmd, check: true).stdout().strip()
endif
if value == ''
error('Required @0@ option not set and autodetection failed'.format(sbatvar[0]))
endif
efi_conf.set_quoted(sbatvar[0].underscorify().to_upper(), value)
endforeach
pkgname = get_option('sbat-distro-pkgname')
if pkgname == ''
pkgname = meson.project_name()
endif
efi_conf.set_quoted('SBAT_DISTRO_PKGNAME', pkgname)
pkgver = get_option('sbat-distro-version')
if pkgver == ''
efi_conf.set('SBAT_DISTRO_VERSION', 'GIT_VERSION')
# This is determined during build, not configuration, so we can't display it yet.
sbat_distro_version_display = '(git version)'
else
efi_conf.set_quoted('SBAT_DISTRO_VERSION', pkgver)
sbat_distro_version_display = pkgver
endif
endif
efi_config_h = configure_file(
output : 'efi_config.h',
configuration : efi_conf)
efi_cflags = [
'-DGNU_EFI_USE_MS_ABI',
'-DSD_BOOT=1',
'-ffreestanding',
'-fshort-wchar',
'-fvisibility=hidden',
'-I', fundamental_path,
'-I', meson.current_source_dir(),
'-include', efi_config_h,
'-include', version_h,
'-std=gnu11',
'-Wall',
'-Wextra',
] + cc.get_supported_arguments(
basic_disabled_warnings +
possible_common_cc_flags + [
'-fno-stack-protector',
'-fno-strict-aliasing',
'-fpic',
'-fwide-exec-charset=UCS2',
]
)
efi_cflags += cc.get_supported_arguments({
'ia32': ['-mno-sse', '-mno-mmx'],
'x86_64': ['-mno-red-zone', '-mno-sse', '-mno-mmx'],
'arm': ['-mgeneral-regs-only', '-mfpu=none'],
}.get(efi_arch[1], []))
# We are putting the efi_cc command line together ourselves, so make sure to pull any
# relevant compiler flags from meson/CFLAGS as povided by the user or distro.
if get_option('werror')
efi_cflags += ['-Werror']
endif
if get_option('debug') and get_option('mode') == 'developer'
efi_cflags += ['-ggdb', '-DEFI_DEBUG']
endif
if get_option('optimization') in ['1', '2', '3', 's', 'g']
efi_cflags += ['-O' + get_option('optimization')]
endif
if get_option('b_ndebug') == 'true' or (
get_option('b_ndebug') == 'if-release' and get_option('buildtype') in ['plain', 'release'])
efi_cflags += ['-DNDEBUG']
endif
if get_option('b_lto')
efi_cflags += cc.has_argument('-flto=auto') ? ['-flto=auto'] : ['-flto']
endif
foreach arg : get_option('c_args')
if arg in [
'-DNDEBUG',
'-fno-lto',
'-O1', '-O2', '-O3', '-Og', '-Os',
'-Werror',
] or arg.split('=')[0] in [
'-ffile-prefix-map',
'-flto',
] or (get_option('mode') == 'developer' and arg in [
'-DEFI_DEBUG',
'-g', '-ggdb',
])
message('Using "@0@" from c_args for EFI compiler'.format(arg))
efi_cflags += arg
endif
endforeach
efi_cflags += get_option('efi-cflags')
efi_ldflags = [
'-fuse-ld=' + efi_ld,
'-L', efi_libdir,
'-nostdlib',
'-T', efi_lds,
'-Wl,--build-id=sha1',
'-Wl,--fatal-warnings',
'-Wl,--no-undefined',
'-Wl,--warn-common',
'-Wl,-Bsymbolic',
'-z', 'nocombreloc',
'-z', 'noexecstack',
efi_crt0,
]
foreach arg : ['-Wl,--no-warn-execstack',
'-Wl,--no-warn-rwx-segments']
# We need to check the correct linker for supported args. This is what
# cc.has_multi_link_arguments() is for, but it helpfully overrides our
# choice of linker by putting its own -fuse-ld= arg after ours.
if run_command('bash', '-c',
'exec "$@" -x c -o/dev/null <(echo "int main(void){return 0;}")' +
' -fuse-ld=' + efi_ld + ' -Wl,--fatal-warnings ' + arg,
'bash', cc.cmd_array(),
check : false).returncode() == 0
efi_ldflags += arg
endif
endforeach
# If using objcopy, crt0 must not include the PE/COFF header
if run_command('grep', '-q', 'coff_header', efi_crt0, check: false).returncode() == 0
coff_header_in_crt0 = true
else
coff_header_in_crt0 = false
endif
if efi_arch[1] in ['arm', 'riscv64'] or (efi_arch[1] == 'aarch64' and (not objcopy_2_38.found() or coff_header_in_crt0))
efi_ldflags += ['-shared']
# ARM32 and 64bit RISC-V don't have an EFI capable objcopy.
# Older objcopy doesn't support Aarch64 either.
# Use 'binary' instead, and add required symbols manually.
efi_ldflags += ['-Wl,--defsym=EFI_SUBSYSTEM=0xa']
efi_format = ['-O', 'binary']
else
efi_ldflags += ['-pie']
if efi_ld == 'bfd'
efi_ldflags += '-Wl,--no-dynamic-linker'
endif
efi_format = ['--target=efi-app-@0@'.format(efi_arch[1])]
endif
if efi_arch[1] == 'arm'
# On arm, the compiler (correctly) warns about wchar_t size mismatch. This
# is because libgcc is not compiled with -fshort-wchar, but it does not
# have any occurrences of wchar_t in its sources or the documentation, so
# it is safe to assume that we can ignore this warning.
efi_ldflags += ['-Wl,--no-wchar-size-warning']
endif
if cc.get_id() == 'clang' and cc.version().split('.')[0].to_int() <= 10
# clang <= 10 doesn't pass -T to the linker and then even complains about it being unused
efi_ldflags += ['-Wl,-T,' + efi_lds, '-Wno-unused-command-line-argument']
endif
summary({
'EFI machine type' : efi_arch[0],
'EFI LD' : efi_ld,
'EFI lds' : efi_lds,
'EFI crt0' : efi_crt0,
'EFI include directory' : efi_archdir},
section : 'Extensible Firmware Interface')
if efi_conf.get('SBAT_DISTRO', '') != ''
summary({
'SBAT distro': efi_conf.get('SBAT_DISTRO'),
'SBAT distro generation': efi_conf.get('SBAT_DISTRO_GENERATION'),
'SBAT distro version': sbat_distro_version_display,
'SBAT distro summary': efi_conf.get('SBAT_DISTRO_SUMMARY'),
'SBAT distro URL': efi_conf.get('SBAT_DISTRO_URL')},
section : 'Extensible Firmware Interface')
endif
############################################################
efi_headers = files(
'bcd.h',
'console.h',
'cpio.h',
'device-path-util.h',
'devicetree.h',
'drivers.h',
'efi-string.h',
'efi.h',
'graphics.h',
'initrd.h',
'linux.h',
'log.h',
'measure.h',
'part-discovery.h',
'pe.h',
'proto/block-io.h',
'proto/console-control.h',
'proto/device-path.h',
'proto/dt-fixup.h',
'proto/file-io.h',
'proto/graphics-output.h',
'proto/load-file.h',
'proto/loaded-image.h',
'proto/rng.h',
'proto/security-arch.h',
'proto/shell-parameters.h',
'proto/simple-text-io.h',
'proto/tcg.h',
'random-seed.h',
'secure-boot.h',
'shim.h',
'splash.h',
'ticks.h',
'util.h',
)
common_sources = files(
'console.c',
'device-path-util.c',
'devicetree.c',
'drivers.c',
'efi-string.c',
'graphics.c',
'initrd.c',
'log.c',
'measure.c',
'part-discovery.c',
'pe.c',
'random-seed.c',
'secure-boot.c',
'ticks.c',
'util.c',
'vmm.c',
)
systemd_boot_sources = files(
'boot.c',
'shim.c',
)
stub_sources = files(
'cpio.c',
'linux.c',
'splash.c',
'stub.c',
)
if efi_arch[1] in ['ia32', 'x86_64']
stub_sources += files('linux_x86.c')
endif
tests += [
{
'sources' : files(
'test-efi-string.c',
'efi-string.c',
)
},
]
# BCD parser only makes sense on arches that Windows supports.
if efi_arch[1] in ['ia32', 'x86_64', 'arm', 'aarch64']
systemd_boot_sources += files('bcd.c')
tests += [
{
'sources' : files(
'test-bcd.c',
'efi-string.c',
),
'dependencies' : libzstd,
'condition' : 'HAVE_ZSTD',
},
]
fuzzers += [
{
'sources' : files(
'fuzz-bcd.c',
'bcd.c',
'efi-string.c'
),
},
{
'sources' : files(
'fuzz-efi-string.c',
'efi-string.c'
),
},
{
'sources' : files(
'fuzz-efi-printf.c',
'efi-string.c'
),
},
]
endif
systemd_boot_objects = []
stub_objects = []
foreach file : fundamental_source_paths + common_sources + systemd_boot_sources + stub_sources
# FIXME: replace ''.format(file) with fs.name(file) when meson_version requirement is >= 0.59.0
o_file = custom_target('@0@.o'.format(file).split('/')[-1],
input : file,
output : '@0@.o'.format(file).split('/')[-1],
command : [cc.cmd_array(), '-c', '@INPUT@', '-o', '@OUTPUT@', efi_cflags],
depend_files : efi_headers + fundamental_headers)
if (fundamental_source_paths + common_sources + systemd_boot_sources).contains(file)
systemd_boot_objects += o_file
endif
if (fundamental_source_paths + common_sources + stub_sources).contains(file)
stub_objects += o_file
endif
endforeach
foreach tuple : [['systemd-boot@0@.@1@', systemd_boot_objects, false, 'systemd-boot'],
['linux@0@.@1@.stub', stub_objects, true, 'systemd-stub']]
elf = custom_target(
tuple[0].format(efi_arch[0], 'elf'),
input : tuple[1],
output : tuple[0].format(efi_arch[0], 'elf'),
command : [cc.cmd_array(),
'-o', '@OUTPUT@',
efi_cflags,
efi_ldflags,
'@INPUT@',
'-lgnuefi',
'-lgcc'],
install : tuple[2],
install_tag: tuple[3],
install_dir : bootlibdir)
efi = custom_target(
tuple[0].format(efi_arch[0], 'efi'),
input : elf,
output : tuple[0].format(efi_arch[0], 'efi'),
command : [objcopy,
'-j', '.bss*',
'-j', '.data',
'-j', '.dynamic',
'-j', '.dynsym',
'-j', '.osrel',
'-j', '.rel*',
'-j', '.sbat',
'-j', '.sdata',
'-j', '.sdmagic',
'-j', '.text',
'--strip-all',
'--section-alignment=512',
efi_format,
'@INPUT@', '@OUTPUT@'],
install : true,
install_tag: tuple[3],
install_dir : bootlibdir)
alias_target(tuple[3], efi)
endforeach
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