On Thu, May 07, 2020 at 09:07:33AM -0500, Josh Poimboeuf wrote:
> On Wed, May 06, 2020 at 05:03:57PM -0700, Alexei Starovoitov wrote:
> > > > > > diff --git a/include/linux/compiler-gcc.h
> > > > > > b/include/linux/compiler-gcc.h
> > > > > > index d7ee4c6bad48..05104c3cc033 100644
> > > > > > ---
On Wed, May 06, 2020 at 05:03:57PM -0700, Alexei Starovoitov wrote:
> > > > > diff --git a/include/linux/compiler-gcc.h
> > > > > b/include/linux/compiler-gcc.h
> > > > > index d7ee4c6bad48..05104c3cc033 100644
> > > > > --- a/include/linux/compiler-gcc.h
> > > > > +++ b/include/linux/compiler-gcc
On Wed, May 06, 2020 at 04:19:45PM -0500, Josh Poimboeuf wrote:
> On Wed, May 06, 2020 at 09:45:01AM -0700, Alexei Starovoitov wrote:
> > On Wed, May 6, 2020 at 8:53 AM Josh Poimboeuf wrote:
> > >
> > > On Tue, May 05, 2020 at 04:59:39PM -0700, Alexei Starovoitov wrote:
> > > > As far as workaroun
On Wed, May 06, 2020 at 09:45:01AM -0700, Alexei Starovoitov wrote:
> On Wed, May 6, 2020 at 8:53 AM Josh Poimboeuf wrote:
> >
> > On Tue, May 05, 2020 at 04:59:39PM -0700, Alexei Starovoitov wrote:
> > > As far as workaround I prefer the following:
> > > From 94bbc27c5a70d78846a5cb675df4cf8732883
On Wed, May 6, 2020 at 8:53 AM Josh Poimboeuf wrote:
>
> On Tue, May 05, 2020 at 04:59:39PM -0700, Alexei Starovoitov wrote:
> > As far as workaround I prefer the following:
> > From 94bbc27c5a70d78846a5cb675df4cf8732883564 Mon Sep 17 00:00:00 2001
> > From: Alexei Starovoitov
> > Date: Tue, 5 Ma
On Tue, May 05, 2020 at 04:59:39PM -0700, Alexei Starovoitov wrote:
> As far as workaround I prefer the following:
> From 94bbc27c5a70d78846a5cb675df4cf8732883564 Mon Sep 17 00:00:00 2001
> From: Alexei Starovoitov
> Date: Tue, 5 May 2020 16:52:41 -0700
> Subject: [PATCH] bpf,objtool: tweak interp
On Tue, May 05, 2020 at 03:28:23PM -0500, Josh Poimboeuf wrote:
> On Tue, May 05, 2020 at 12:53:20PM -0700, Alexei Starovoitov wrote:
> > On Tue, May 05, 2020 at 01:11:08PM -0500, Josh Poimboeuf wrote:
> > > On Tue, May 05, 2020 at 10:43:00AM -0700, Alexei Starovoitov wrote:
> > > > > Or, if you wa
On Tue, May 05, 2020 at 12:53:20PM -0700, Alexei Starovoitov wrote:
> On Tue, May 05, 2020 at 01:11:08PM -0500, Josh Poimboeuf wrote:
> > On Tue, May 05, 2020 at 10:43:00AM -0700, Alexei Starovoitov wrote:
> > > > Or, if you want to minimize the patch's impact on other arches, and keep
> > > > the
On Tue, May 05, 2020 at 01:11:08PM -0500, Josh Poimboeuf wrote:
> On Tue, May 05, 2020 at 10:43:00AM -0700, Alexei Starovoitov wrote:
> > > Or, if you want to minimize the patch's impact on other arches, and keep
> > > the current patch the way it is (with bug fixed and changed patch
> > > descript
On Tue, May 05, 2020 at 12:14:05PM -0700, Alexei Starovoitov wrote:
> >
> > Hi,
> >
> > I see the objtool warning:
> > kernel/bpf/core.o: warning: objtool: ___bpf_prog_run()+0x33: call without
> > frame pointer save/setup
> >
> > when using:
> > gcc (SUSE Linux) 9.3.1 20200406 [revision
> > 6d
>
> Hi,
>
> I see the objtool warning:
> kernel/bpf/core.o: warning: objtool: ___bpf_prog_run()+0x33: call without
> frame pointer save/setup
>
> when using:
> gcc (SUSE Linux) 9.3.1 20200406 [revision
> 6db837a5288ee3ca5ec504fbd5a765817e556ac2]
>
> with the attached config file.
Thanks Rand
On Tue, May 05, 2020 at 10:43:00AM -0700, Alexei Starovoitov wrote:
> > Or, if you want to minimize the patch's impact on other arches, and keep
> > the current patch the way it is (with bug fixed and changed patch
> > description), that's fine too. I can change the patch description
> > according
On Sat, May 02, 2020 at 02:21:05PM -0500, Josh Poimboeuf wrote:
>
> Ideally we would get rid of that label and just change all the 'goto
> select_insn' to 'goto *jumptable[insn->code]'. That allows objtool to
> follow the code in both retpoline and non-retpoline cases. It also
> simplifies the c
On Fri, May 01, 2020 at 08:06:22PM -0700, Alexei Starovoitov wrote:
> On Fri, May 01, 2020 at 02:56:17PM -0500, Josh Poimboeuf wrote:
> > On Fri, May 01, 2020 at 12:40:53PM -0700, Alexei Starovoitov wrote:
> > > On Fri, May 01, 2020 at 02:22:04PM -0500, Josh Poimboeuf wrote:
> > > > On Fri, May 01,
On Fri, May 01, 2020 at 02:56:17PM -0500, Josh Poimboeuf wrote:
> On Fri, May 01, 2020 at 12:40:53PM -0700, Alexei Starovoitov wrote:
> > On Fri, May 01, 2020 at 02:22:04PM -0500, Josh Poimboeuf wrote:
> > > On Fri, May 01, 2020 at 12:09:30PM -0700, Alexei Starovoitov wrote:
> > > > On Thu, Apr 30,
On Fri, May 01, 2020 at 12:40:53PM -0700, Alexei Starovoitov wrote:
> On Fri, May 01, 2020 at 02:22:04PM -0500, Josh Poimboeuf wrote:
> > On Fri, May 01, 2020 at 12:09:30PM -0700, Alexei Starovoitov wrote:
> > > On Thu, Apr 30, 2020 at 02:07:43PM -0500, Josh Poimboeuf wrote:
> > > > Objtool decodes
On Fri, May 01, 2020 at 02:22:04PM -0500, Josh Poimboeuf wrote:
> On Fri, May 01, 2020 at 12:09:30PM -0700, Alexei Starovoitov wrote:
> > On Thu, Apr 30, 2020 at 02:07:43PM -0500, Josh Poimboeuf wrote:
> > > Objtool decodes instructions and follows all potential code branches
> > > within a functio
On Fri, May 01, 2020 at 12:09:30PM -0700, Alexei Starovoitov wrote:
> On Thu, Apr 30, 2020 at 02:07:43PM -0500, Josh Poimboeuf wrote:
> > Objtool decodes instructions and follows all potential code branches
> > within a function. But it's not an emulator, so it doesn't track
> > register values.
On Thu, Apr 30, 2020 at 02:07:43PM -0500, Josh Poimboeuf wrote:
> Objtool decodes instructions and follows all potential code branches
> within a function. But it's not an emulator, so it doesn't track
> register values. For that reason, it usually can't follow
> intra-function indirect branches,
Objtool decodes instructions and follows all potential code branches
within a function. But it's not an emulator, so it doesn't track
register values. For that reason, it usually can't follow
intra-function indirect branches, unless they're using a jump table
which follows a certain format (e.g.,
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