Date: Mon, 2 Sep 2024 18:57:05 +0100 From: Jessica Clarke <jrtc27@freebsd.org> To: Dennis Clarke <dclarke@blastwave.org> Cc: "riscv@freebsd.org" <riscv@FreeBSD.org>, John Baldwin <jhb@freebsd.org> Subject: Re: kldxref: /boot/kernel/kernel: no ELF relocation table found Message-ID: <02D984C2-3505-4E61-BC24-21E9E5249F70@freebsd.org> In-Reply-To: <8a58b38a-b7fb-494e-a730-e4c341aaa9ee@blastwave.org> References: <8a58b38a-b7fb-494e-a730-e4c341aaa9ee@blastwave.org>
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On 2 Sep 2024, at 11:54, Dennis Clarke <dclarke@blastwave.org> wrote: >=20 >=20 > All: >=20 > Ye ol "make installkernel" starts nicely but ends a little odd : >=20 >=20 > e# make installkernel > -------------------------------------------------------------- > >>> Install check kernel > -------------------------------------------------------------- > -------------------------------------------------------------- > >>> Installing kernel GENERIC on Mon Sep 2 10:10:05 UTC 2024 > -------------------------------------------------------------- > cd /usr/obj/usr/src/riscv.riscv64/sys/GENERIC; MACHINE_ARCH=3Driscv64 = MACHINE=3Driscv CPUTYPE=3D CC=3D"cc -target riscv64-unknown-freebsd15.0 = --sysroot=3D/usr/obj/usr/src/riscv.riscv64/tmp = -B/usr/obj/usr/src/riscv.riscv64/tmp/usr/bin" CXX=3D"c++ -target = riscv64-unknown-freebsd15.0 --sysroot=3D/usr/obj/usr/src/riscv.riscv64/tmp= -B/usr/obj/usr/src/riscv.riscv64/tmp/usr/bin" CPP=3D"cpp -target = riscv64-unknown-freebsd15.0 --sysroot=3D/usr/obj/usr/src/riscv.riscv64/tmp= -B/usr/obj/usr/src/riscv.riscv64/tmp/usr/bin" AS=3D"as" AR=3D"ar" = ELFCTL=3D"elfctl" LD=3D"ld" LLVM_LINK=3D"" NM=3Dnm OBJCOPY=3D"objcopy" = RANLIB=3Dranlib STRINGS=3D SIZE=3D"size" STRIPBIN=3D"strip" = PATH=3D/usr/obj/usr/src/riscv.riscv64/tmp/bin:/usr/obj/usr/src/riscv.riscv= 64/tmp/usr/sbin:/usr/obj/usr/src/riscv.riscv64/tmp/usr/bin:/usr/obj/usr/sr= c/riscv.riscv64/tmp/legacy/usr/sbin:/usr/obj/usr/src/riscv.riscv64/tmp/leg= acy/usr/bin:/usr/obj/usr/src/riscv.riscv64/tmp/legacy/bin:/usr/obj/usr/src= /riscv.riscv64/tmp/legacy/usr/libexec::/sbin:/bin:/usr/sbin:/usr/bin = make KERNEL=3Dkernel METALOG=3D install > thiskernel=3D`sysctl -n kern.bootfile || echo /boot/kernel/kernel` ; = if [ ! "`dirname "$thiskernel"`" -ef /boot/kernel ] ; then chflags -R = noschg /boot/kernel ; rm -rf /boot/kernel ; rm -rf = /usr/lib/debug/boot/kernel ; else if [ -d /boot/kernel.old ] ; then = chflags -R noschg /boot/kernel.old ; rm -rf /boot/kernel.old ; fi ; = mv /boot/kernel /boot/kernel.old ; if [ -n "/usr/lib/debug" -a -d = /usr/lib/debug/boot/kernel ]; then rm -rf = /usr/lib/debug/boot/kernel.old ; mv /usr/lib/debug/boot/kernel = /usr/lib/debug/boot/kernel.old ; fi ; sysctl = kern.bootfile=3D/boot/kernel.old/"`basename "$thiskernel"`" ; fi > kern.bootfile: /boot/kernel/kernel -> /boot/kernel.old/kernel > mkdir -p /boot/kernel > install -p -m 444 -o root -g wheel kernel /boot/kernel/ > mkdir -p /usr/lib/debug/boot/kernel > install -p -m 444 -o root -g wheel kernel.debug = /usr/lib/debug/boot/kernel/ > cd /usr/src/sys/modules; = MAKEOBJDIRPREFIX=3D/usr/obj/usr/src/riscv.riscv64/sys/GENERIC/modules = KMODDIR=3D/boot/kernel MACHINE_CPUARCH=3Driscv MACHINE=3Driscv = MACHINE_ARCH=3Driscv64 MODULES_EXTRA=3D"dtb/sifive" WITHOUT_MODULES=3D"" = ARCH_FLAGS=3D"" DEBUG_FLAGS=3D"-g" __MPATH=3D"" = KERNBUILDDIR=3D"/usr/obj/usr/src/riscv.riscv64/sys/GENERIC" = SYSDIR=3D"/usr/src/sys" MODULE_TIED=3Dyes WITH_CTF=3D"1" make install > =3D=3D=3D> accf_data (install) > install -T release -o root -g wheel -m 444 accf_data.ko = /boot/kernel/ > install -T dbg -o root -g wheel -m 444 accf_data.ko.debug = /usr/lib/debug/boot/kernel/ > =3D=3D=3D> accf_dns (install) > install -T release -o root -g wheel -m 444 accf_dns.ko /boot/kernel/ > install -T dbg -o root -g wheel -m 444 accf_dns.ko.debug = /usr/lib/debug/boot/kernel/ > . > . > . etc etc etc > . > . > =3D=3D=3D> xz (install) > install -T release -o root -g wheel -m 444 xz.ko /boot/kernel/ > install -T dbg -o root -g wheel -m 444 xz.ko.debug = /usr/lib/debug/boot/kernel/ > =3D=3D=3D> zfs (install) > install -T release -o root -g wheel -m 444 zfs.ko /boot/kernel/ > install -T dbg -o root -g wheel -m 444 zfs.ko.debug = /usr/lib/debug/boot/kernel/ > =3D=3D=3D> zlib (install) > install -T release -o root -g wheel -m 444 zlib.ko /boot/kernel/ > install -T dbg -o root -g wheel -m 444 zlib.ko.debug = /usr/lib/debug/boot/kernel/ > kldxref /boot/kernel > kldxref: /boot/kernel/kernel: no ELF relocation table found >=20 > -------------------------------------------------------------- > >>> Installing kernel GENERIC completed on Mon Sep 2 10:13:55 UTC = 2024 > -------------------------------------------------------------- >=20 >=20 >=20 >=20 > So then ... "no ELF relocation table found"? >=20 > Looking at = https://cgit.freebsd.org/src/tree/usr.sbin/kldxref/ef.c#n220 > and then downwards to line 367 : >=20 > if (rel_off =3D=3D 0 && rela_off =3D=3D 0) { > warnx("%s: no ELF relocation table found\n", ef->ef_name); > error =3D EFTYPE; > goto out; > } >=20 > Which makes me wonder about the ( I hope ) harmless output from this : >=20 >=20 > # kldxref -dv /boot/kernel > /boot/kernel/accf_data.ko > module accf_data > depends on kernel.1500023 (1500023,1500023) > interface accf_data.1 > /boot/kernel/accf_dns.ko > module accf_dns > depends on kernel.1500023 (1500023,1500023) > interface accf_dns.1 > . > . > . > /boot/kernel/kern_testfrwk.ko > module kern_testframework > interface kern_testframework.1 > depends on kernel.1500023 (1500023,1500023) > /boot/kernel/kernel > kldxref: /boot/kernel/kernel: no ELF relocation table found >=20 > kldxref: /boot/kernel/kernel: not a valid DSO or object file: = Inappropriate file type or format > /boot/kernel/kgssapi.ko > module kgssapi > depends on kernel.1500023 (1500023,1500023) > depends on xdr.1 (1,1) > depends on krpc.1 (1,1) > interface kgssapi.1 > . > . > . >=20 > etc etc >=20 > . > . > . >=20 >=20 >=20 >=20 >=20 > Also I do see this was created : >=20 > e# ls -lapb /boot/kernel/linker.hints > -rw-r--r-- 1 root wheel 212416 Sep 2 10:13 /boot/kernel/linker.hints > e# >=20 > Looking over the output from "readelf -delV /boot/kernel.old/kernel" = as > well as this new kernel they both look very similar. Addresses and = some > other bits changed of course. >=20 > So therefore the situation : >=20 > ( 1 ) well understood and just a normal red herring[1] >=20 > ( 2 ) ignore it >=20 > ( 3 ) huh? that's weird. never saw that before. >=20 > Curious what is going on there. It=E2=80=99s a harmless warning from an overly-careful set of checks. = The tool was refactored and this case went from being ignored to warning. = Cc=E2=80=99ing jhb@ to remind him of this as I pointed it out a while ago. Jess
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