Date: Thu, 27 Jun 2019 14:53:12 -0500 From: Justin Hibbits <jrh29@alumni.cwru.edu> To: Mark Millard <marklmi@yahoo.com> Cc: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: Re: FreeBSD/powerpc and FreeBSD/powerpcspe toolchain update Message-ID: <20190627145312.5abd82e7@titan.knownspace> In-Reply-To: <CE47F595-68EF-43A2-877B-61C1981AF9E7@yahoo.com> References: <CAHSQbTBjZFb1dPk2FN=438i0FVtAKHYy-y22L%2BHFEDrTmd-9Aw@mail.gmail.com> <CE47F595-68EF-43A2-877B-61C1981AF9E7@yahoo.com>
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On Thu, 27 Jun 2019 12:03:05 -0700 Mark Millard <marklmi@yahoo.com> wrote: > On 2019-Jun-24, at 19:40, Justin Hibbits <jrh29@alumni.cwru.edu> > wrote: > > > As of r349351 32-bit powerpc toolchains need to be rebuilt as part > > of buildworld, in order to take advantage of the new Secure > > Procedure Linkage Table (Secure-PLT) format. This can be done by > > passing "WITHOUT_SYSTEM_TOOLCHAIN=" on the 'make buildworld' > > command line. > > > > Cross-building should work fine with no changes, as that already > > builds a new toolchain. If building with an external toolchain, > > such as gcc8, add 'CFLAGS+= -msecure-plt' to /etc/src.conf to > > ensure the new PLT is used, otherwise it will default to BSS-PLT, > > which is fully compatible, but not as secure. There is breakage > > intended at all, so please let me know if there are any problems. > > My attempt to amd64->powerpc (32-bit) cross build from/to head > -r349444 via system clang and lld got the following. This may not be > a recent change. It has been a long time since I tried lld, instead > using devel/powerpc64-binutils. ( devel/powerpc64-binutils now fails > where it used to work, but I sent a separate note out about that. ) > > --- agp.ko.full --- > ld: agp.kld(.text+0x37a4): R_PPC_PLTREL24 reloc against local symbol > agp.kld: could not read symbols: Bad value > *** [agp.ko.full] Error code 1 > Hi Mark, Can you determine what symbol has that relocation? I don't see that error when building natively, or cross-building with base toolchain, so there's very likely a change in binutils between 2.17 and now that's leading to this failure. > > === > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) > - Justin
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