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Date:      Mon, 23 Jan 2017 19:37:47 +0100
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Shawn Webb <shawn.webb@hardenedbsd.org>
Cc:        FreeBSD Toolchain <freebsd-toolchain@freebsd.org>, Ed Maste <emaste@freebsd.org>
Subject:   Re: [clang/lld 4.0.0 arm64] link failure in sys/boot/efi/loader
Message-ID:  <FC9898D6-50A5-4545-8111-EDA328EF026F@FreeBSD.org>
In-Reply-To: <20170123152751.szrkvk73a2wwp2ee@mutt-hardenedbsd>
References:  <20170123152751.szrkvk73a2wwp2ee@mutt-hardenedbsd>

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On 23 Jan 2017, at 16:27, Shawn Webb <shawn.webb@hardenedbsd.org> wrote:
>=20
> Here's an interesting failure I'm seeing on HardenedBSD with clang =
4.0.0
> bits mixed in:
>=20
> =3D=3D=3D=3D BEGIN LOG =3D=3D=3D=3D
> cc -target aarch64-unknown-freebsd12.0 --sysroot=3D/usr/obj/usr/src/tmp =
-B/usr -O2 -pipe -DHARDENEDBSD -DSKEIN_LOOP=3D111 =
-I/usr/src/sys/boot/efi/loader/../../arm64/libarm64 -msoft-float =
-mgeneral-regs-only -I/usr/src/sys/boot/efi/loader =
-I/usr/src/sys/boot/efi/loader/arch/arm64 =
-I/usr/src/sys/boot/efi/loader/../include =
-I/usr/src/sys/boot/efi/loader/../include/arm64 =
-I/usr/src/sys/boot/efi/loader/../../../contrib/dev/acpica/include =
-I/usr/src/sys/boot/efi/loader/../../.. =
-I/usr/src/sys/boot/efi/loader/../../i386/libi386 =
-I/usr/src/sys/boot/efi/loader/../../zfs =
-I/usr/src/sys/boot/efi/loader/../../../cddl/boot/zfs =
-I/usr/src/sys/boot/efi/loader/../../../crypto/skein -DEFI_ZFS_BOOT =
-DNO_PCI -DEFI -DSMBIOS_SERIAL_NUMBERS -DBOOT_FORTH =
-I/usr/src/sys/boot/efi/loader/../../ficl =
-I/usr/src/sys/boot/efi/loader/../../ficl/aarch64 =
-I/usr/src/sys/boot/efi/loader/../../fdt =
-I/usr/obj/usr/src/sys/boot/efi/loader/../../fdt -DLOADER_FDT_SUPPORT =
-DLOADER_DISK_SUPPORT -DLOADER_GPT_SUPPORT -DLOADER_MBR_SUPPORT =
-I/usr/src/sys/boot/ficl -I/usr/src/sys/boot/ficl/aarch64 =
-I/usr/src/sys/boot/ficl/../common =
-I/usr/src/sys/boot/efi/loader/../../common -ffreestanding -Wformat =
-msoft-float -fshort-wchar -fPIC -g -DHAVE_LIBRESSL -std=3Dgnu99 =
-Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter =
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith =
-Wno-uninitialized -Wno-pointer-sign -Wno-empty-body =
-Wno-string-plus-int -Wno-unused-const-variable =
-Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality =
-Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef =
-Wno-address-of-packed-member -Qunused-arguments  =
-Wl,-T/usr/src/sys/boot/efi/loader/arch/arm64/ldscript.arm64 =
-Wl,-Bsymbolic -shared -nostdlib -Wl,-z,relro -Wl,-z,now -o =
loader.sym.full autoload.o bootinfo.o conf.o copy.o devicename.o main.o =
self_reloc.o smbios.o vers.o zfs.o skein.o skein_block.o exec.o start.o =
cache.o boot.o commands.o console.o devopen.o interp.o =
interp_backslash.o interp_parse.o ls.o misc.o module.o panic.o =
load_elf64.o reloc_elf64.o disk.o part.o crc32.o bcache.o interp_forth.o =
 /usr/obj/usr/src/sys/boot/efi/loader/../../ficl/libficl.a =
/usr/obj/usr/src/sys/boot/efi/loader/../libefi/libefi.a =
/usr/obj/usr/src/sys/boot/efi/loader/../../fdt/libfdt.a =
/usr/obj/usr/src/sys/boot/efi/loader/../../efi/fdt/libefi_fdt.a =
/usr/obj/usr/src/sys/boot/efi/loader/../../../../lib/libstand/libstand.a
> /usr/bin/ld: error: Section has flags incompatible with others with =
the same name autoload.o:(.text)
> /usr/bin/ld: error: /usr/src/sys/boot/ficl/ficl.c:(.rodata+0x0): can't =
create dynamic relocation R_AARCH64_ABS64 against local symbol in =
readonly segment defined in =
/usr/obj/usr/src/sys/boot/efi/loader/../../ficl/libficl.a(ficl.o)
> /usr/bin/ld: error: /usr/src/sys/boot/ficl/ficl.c:(.rodata+0x8): can't =
create dynamic relocation R_AARCH64_ABS64 against local symbol in =
readonly segment defined in =
/usr/obj/usr/src/sys/boot/efi/loader/../../ficl/libficl.a(ficl.o)

Not an AArch64 expert here, but if I understand correctly AArch64's
world must be linked with a ports version of binutils?  Ed, any clues
about this?  Then again, this could also point to some real problem with
the section flags.

-Dimitry


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