On Sat, Jan 9, 2021 at 5:07 PM Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > > On Sat, Jan 09, 2021 at 04:46:21PM +0100, Sedat Dilek wrote: > > On Sat, Jan 9, 2021 at 4:36 PM Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > > > > > > On Sat, Jan 09, 2021 at 03:54:20PM +0100, Sedat Dilek wrote: > > > > I am interested in having Clang LTO (Clang-CFI) for x86-64 working and > > > > help with testing. > > > > > > > > I tried the Git tree mentioned in [3] <jpoimboe.git#objtool-vmlinux> > > > > (together with changes from <peterz.git#x86/urgent>). > > > > > > > > I only see in my build-log... > > > > > > > > drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool: > > > > eb_relocate_parse_slow()+0x3d0: stack state mismatch: cfa1=7+120 > > > > cfa2=-1+0 > > > > drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool: > > > > eb_copy_relocations()+0x229: stack state mismatch: cfa1=7+120 > > > > cfa2=-1+0 > > > > > > > > ...which was reported and worked on in [1]. > > > > > > > > This is with Clang-IAS version 11.0.1. > > > > > > > > Unfortunately, the recent changes in <samitolvanen.github#clang-cfi> > > > > do not cleanly apply with Josh stuff. > > > > My intention/wish was to report this combination of patchsets "heals" > > > > a lot of objtool-warnings for vmlinux.o I observed with Clang-CFI. > > > > > > > > Is it possible to have a Git branch where Josh's objtool-vmlinux is > > > > working together with Clang-LTO? > > > > For testing purposes. > > > > > > I updated my branch with my most recent work from before the holidays, > > > can you try it now? It still doesn't fix any of the crypto warnings, > > > but I'll do that in a separate set after posting these next week. > > > > > > > Thanks, Josh. > > > > Did you push it (oh ah push it push it really really really good...) > > to your remote Git please :-). > > I thought I already pushed it pretty good ;-) do you not see it? > > git://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git objtool-vmlinux > > d6baee244f2d — objtool: Alphabetize usage option list (3 weeks ago) > c0b2a6a625ac — objtool: Separate vmlinux/noinstr validation config options (3 weeks ago) > 84c53551ad17 — objtool: Enable full vmlinux validation (3 weeks ago) > e518ac0801cd — x86/power: Support objtool validation in hibernate_asm_64.S (3 weeks ago) > d0ac4c7301c1 — x86/power: Move restore_registers() to top of the file (3 weeks ago) > d3389bc83538 — x86/power: Convert indirect jumps to retpolines (3 weeks ago) > 7a974d90aa40 — x86/acpi: Support objtool validation in wakeup_64.S (3 weeks ago) > 6693e26cd6cc — x86/acpi: Convert indirect jump to retpoline (3 weeks ago) > 0dfb760c74d1 — x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S (3 weeks ago) > 89a4febfd7bf — x86/xen/pvh: Convert indirect jump to retpoline (3 weeks ago) > b62837092140 — x86/xen: Support objtool vmlinux.o validation in xen-head.S (3 weeks ago) > 705e18481ed9 — x86/xen: Support objtool validation in xen-asm.S (3 weeks ago) > 3548319e21b9 — objtool: Add xen_start_kernel() to noreturn list (3 weeks ago) > 6016e8da8c3d — objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC (3 weeks ago) > 56d6a7aee8b1 — objtool: Add asm version of STACK_FRAME_NON_STANDARD (3 weeks ago) > 68259d951f1a — objtool: Assume only ELF functions do sibling calls (3 weeks ago) > 0d6c8816cf91 — x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub (3 weeks ago) > 24d6ce8cd8f6 — objtool: Support retpoline jump detection for vmlinux.o (3 weeks ago) > 8145ea268f16 — objtool: Fix ".cold" section suffix check for newer versions of GCC (3 weeks ago) > b3dfca472514 — objtool: Fix retpoline detection in asm code (3 weeks ago) > b82402fa5211 — objtool: Fix error handling for STD/CLD warnings (3 weeks ago) > 1f02defb4b79 — objtool: Fix seg fault in BT_FUNC() with fake jump (3 weeks ago) > 2c85ebc57b3e — Linux 5.10 (4 weeks ago) > I already have this one in my patch-series - I hoped you pushed something new to your objtool-vmlinux Git branch. That is what I mean by shortened... <jpoimboe.git#objtool-vmlinux>. Hey, it's based on Linux v5.10 - I can test this with Linux v5.10.6 :-). - Sedat -
