From: Joao Moreira <jmoreira@suse.de>
To: Miroslav Benes <mbenes@suse.cz>, Joe Lawrence <joe.lawrence@redhat.com>
Cc: live-patching@vger.kernel.org, pmladek@suse.cz, jikos@suse.cz,
nstange@suse.de, jpoimboe@redhat.com, khlebnikov@yandex-team.ru,
jeyu@kernel.org, matz@suse.de, linux-kernel@vger.kernel.org,
yamada.masahiro@socionext.com, linux-kbuild@vger.kernel.org,
michal.lkml@markovi.net
Subject: Re: [PATCH v2 2/8] kbuild: Support for Symbols.list creation
Date: Tue, 26 Mar 2019 11:40:55 -0300 [thread overview]
Message-ID: <5f615af5-ced7-2361-5b71-71fece8b43c5@suse.de> (raw)
In-Reply-To: <alpine.LSU.2.21.1903202000470.29796@pobox.suse.cz>
On 3/20/19 4:08 PM, Miroslav Benes wrote:
>>> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
>>> index fd03d60f6c5a..1e28ad21314c 100644
>>> --- a/scripts/Makefile.build
>>> +++ b/scripts/Makefile.build
>>> @@ -247,6 +247,11 @@ cmd_gen_ksymdeps = \
>>> $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd
>>> endif
>>>
>>> +ifdef CONFIG_LIVEPATCH
>>> +cmd_livepatch = $(if $(LIVEPATCH_$(basetarget).o), \
>>> + $(shell touch $(MODVERDIR)/$(basetarget).livepatch))
>>> +endif
>>> +
>>> define rule_cc_o_c
>>> $(call cmd,checksrc)
>>> $(call cmd_and_fixdep,cc_o_c)
>>> @@ -283,6 +288,7 @@ $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) F
>>> $(call if_changed_rule,cc_o_c)
>>> @{ echo $(@:.o=.ko); echo $@; \
>>> $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
>>> + $(call cmd_livepatch)
>>>
>>> quiet_cmd_cc_lst_c = MKLST $@
>>> cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
>>
>> Since cmd_livepatch is only called for single-used-m, does this mean
>> that we can only klp-convert single object file livepatch modules?
>>
>> I stumbled upon this when trying to create a self-test module that
>> incorporated two object files. I tried adding a $(call cmd_livepatch)
>> in the recipe for $(obj)/%.o, but that didn't help. My kbuild foo
>> wasn't good enough to figure this one out.
>
> I looked at my original code and it is a bit different there. I placed it
> under rule_cc_o_c right after objtool command. If I remember correctly
> this is the correct recipe for .c->.o. Unfortunately I forgot the details
> and there is of course nothing about it in my notes.
>
> Does it help?
>
> Joao, is there a reason you moved it elsewhere?
Hi,
Unfortunately I can't remember why the chunk was moved to where it is in
this version of the patch, sorry. Yet, I did try to move this into the
rule cc_o_c and it seemed to work with not damage.
Joe, would you kindly verify and squash properly the patch below, which
places cmd_livepatch in rule_cc_o_c?
Thank you.
Subject: [PATCH] Move cmd_klp_convert to the right place
Signed-off-by: Joao Moreira <jmoreira@suse.de>
---
scripts/Makefile.build | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 1e28ad21314c..5f66106a47d6 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -260,6 +260,7 @@ define rule_cc_o_c
$(call cmd,objtool)
$(call cmd,modversions_c)
$(call cmd,record_mcount)
+ $(call cmd,livepatch)
endef
define rule_as_o_S
@@ -288,7 +289,6 @@ $(single-used-m): $(obj)/%.o: $(src)/%.c
$(recordmcount_source) $(objtool_dep) F
$(call if_changed_rule,cc_o_c)
@{ echo $(@:.o=.ko); echo $@; \
$(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
- $(call cmd_livepatch)
quiet_cmd_cc_lst_c = MKLST $@
cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
--
2.16.4
>
> Miroslav
>
next prev parent reply other threads:[~2019-03-26 14:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190301141313.15057-1-jmoreira@suse.de>
2019-03-18 19:18 ` [PATCH v2 0/8] klp-convert Joe Lawrence
2019-03-26 20:18 ` Joao Moreira
2019-03-26 21:03 ` Joe Lawrence
2019-04-04 11:49 ` Miroslav Benes
2019-04-04 13:19 ` Joe Lawrence
[not found] ` <20190301141313.15057-3-jmoreira@suse.de>
2019-03-18 19:19 ` [PATCH v2 2/8] kbuild: Support for Symbols.list creation Joe Lawrence
2019-03-20 19:08 ` Miroslav Benes
2019-03-26 14:40 ` Joao Moreira [this message]
2019-03-26 16:15 ` Joe Lawrence
2019-03-26 18:13 ` Joao Moreira
2019-03-26 20:53 ` Joe Lawrence
2019-03-28 20:17 ` Joe Lawrence
2019-04-01 19:35 ` Joe Lawrence
2019-04-03 12:48 ` Miroslav Benes
2019-04-03 19:10 ` Joe Lawrence
2019-04-04 9:14 ` Miroslav Benes
2019-04-04 10:59 ` Miroslav Benes
[not found] ` <20190301141313.15057-4-jmoreira@suse.de>
2019-03-18 19:20 ` [PATCH v2 3/8] livepatch: Add klp-convert tool Joe Lawrence
2019-03-20 19:36 ` Miroslav Benes
2019-03-26 20:13 ` Joao Moreira
[not found] ` <20190301141313.15057-7-jmoreira@suse.de>
2019-03-18 19:20 ` [PATCH v2 6/8] modpost: Add modinfo flag to livepatch modules Joe Lawrence
[not found] ` <20190301141313.15057-8-jmoreira@suse.de>
2019-03-18 19:21 ` [PATCH v2 7/8] livepatch: Add sample livepatch module Joe Lawrence
[not found] ` <20190301141313.15057-9-jmoreira@suse.de>
2019-03-18 19:21 ` [PATCH v2 8/8] documentation: Update on livepatch elf format Joe Lawrence
2019-03-20 19:58 ` Miroslav Benes
[not found] ` <20190301141313.15057-6-jmoreira@suse.de>
2019-03-18 19:20 ` [PATCH v2 5/8] modpost: Integrate klp-convert Joe Lawrence
2019-03-22 14:54 ` Joe Lawrence
2019-03-22 16:37 ` Joao Moreira
2019-03-22 18:29 ` Joe Lawrence
2019-04-04 11:31 ` Miroslav Benes
2019-04-04 13:55 ` Joao Moreira
[not found] <20190130165446.19479-1-jmoreira@suse.de>
[not found] ` <20190130165446.19479-3-jmoreira@suse.de>
2019-02-20 14:09 ` [PATCH v2 2/8] kbuild: Support for Symbols.list creation Miroslav Benes
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