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-rw-r--r--src/boot/efi/meson.build500
1 files changed, 500 insertions, 0 deletions
diff --git a/src/boot/efi/meson.build b/src/boot/efi/meson.build
new file mode 100644
index 0000000..0196314
--- /dev/null
+++ b/src/boot/efi/meson.build
@@ -0,0 +1,500 @@
+# 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'))
+efi_conf.set10('EFI_TPM_PCR_COMPAT', get_option('efi-tpm-pcr-compat'))
+
+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',
+ '-ffreestanding',
+ '-fshort-wchar',
+ '-fvisibility=hidden',
+ '-I', fundamental_path,
+ '-I', meson.current_source_dir(),
+ '-include', efi_config_h,
+ '-include', version_h,
+ '-I', efi_archdir,
+ '-isystem', efi_incdir,
+ '-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',
+ ]
+)
+
+# Our code size has increased enough to possibly create overlapping PE sections
+# at sd-stub runtime, which will often enough prevent the image from booting.
+# This only happens because the usual instructions for assembling a unified
+# kernel image contain hardcoded addresses for section VMAs added in. Until a
+# proper solution is in place, we can at least compile with as least -O1 to
+# reduce the likelihood of this happening.
+# https://github.com/systemd/systemd/issues/24202
+efi_cflags += '-O1'
+
+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 run_command('grep', '-q', '__CTOR_LIST__', efi_lds, check: false).returncode() == 0
+ # fedora has a patched gnu-efi that adds support for ELF constructors.
+ # If ld is called by gcc something about these symbols breaks, resulting
+ # in sd-boot freezing when gnu-efi runs the constructors. Force defining
+ # them seems to work around this.
+ efi_ldflags += [
+ '-Wl,--defsym=_init_array=0',
+ '-Wl,--defsym=_init_array_end=0',
+ '-Wl,--defsym=_fini_array=0',
+ '-Wl,--defsym=_fini_array_end=0',
+ '-Wl,--defsym=__CTOR_LIST__=0',
+ '-Wl,--defsym=__CTOR_END__=0',
+ '-Wl,--defsym=__DTOR_LIST__=0',
+ '-Wl,--defsym=__DTOR_END__=0',
+ ]
+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',
+ 'devicetree.h',
+ 'disk.h',
+ 'drivers.h',
+ 'efi-string.h',
+ 'graphics.h',
+ 'initrd.h',
+ 'linux.h',
+ 'measure.h',
+ 'missing_efi.h',
+ 'pe.h',
+ 'random-seed.h',
+ 'secure-boot.h',
+ 'shim.h',
+ 'splash.h',
+ 'ticks.h',
+ 'util.h',
+ 'xbootldr.h',
+)
+
+common_sources = files(
+ 'assert.c',
+ 'console.c',
+ 'devicetree.c',
+ 'disk.c',
+ 'efi-string.c',
+ 'graphics.c',
+ 'initrd.c',
+ 'measure.c',
+ 'pe.c',
+ 'secure-boot.c',
+ 'ticks.c',
+ 'util.c',
+)
+
+systemd_boot_sources = files(
+ 'boot.c',
+ 'drivers.c',
+ 'random-seed.c',
+ 'vmm.c',
+ 'shim.c',
+ 'xbootldr.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 += [
+ [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 += [
+ [files('test-bcd.c', 'efi-string.c'),
+ [],
+ [libzstd],
+ [],
+ 'HAVE_ZSTD'],
+ ]
+ fuzzers += [
+ [files('fuzz-bcd.c', 'bcd.c', 'efi-string.c')],
+ [files('fuzz-efi-string.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@',
+ '-lefi',
+ '-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',
+ '--section-alignment=512',
+ efi_format,
+ '@INPUT@', '@OUTPUT@'],
+ install : true,
+ install_tag: tuple[3],
+ install_dir : bootlibdir)
+
+ alias_target(tuple[3], efi)
+endforeach
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 10:27:39 +0000