2018-05-24 9:11 GMT+09:00 Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>: > 2018-05-24 7:53 GMT+09:00 Laura Abbott <labbott@xxxxxxxxxx>: >> On 05/22/2018 05:33 PM, Andy Lutomirski wrote: >>> >>> On Tue, May 22, 2018 at 5:19 PM Laura Abbott <labbott@xxxxxxxxxx> wrote: >>> >>> >>>> The vDSO is linked separately from the kernel and modules. Ensure it >>>> picks >>>> up the comment section, if available. >>> >>> >>> Did you end up preferring this to just sticking the kernel version in a >>> .comment in the vDSO for some reason? >>> >> >> Actually I remember now why this is necessary: there is not a simple way >> to encode a string into a linker file as it has to be spit out byte >> by byte. The autogeneration was the easiest way to make that happen. >> Maybe there's some horrific c preprocessing or other generation that >> could happen but I doubt that's any worse than the generated linker >> script. >> > > > I am personally prefer CONFIG option (as you did in v2) to KERNELVERSION. > > > If you use "hex" type instead of "string" type in Kconfig, > and LONG() instead of BYTE() in the script script, > this can be much simpler, right? > > > > > > config BUILD_ID_SALT > hex "Build ID Salt" > help > ... > > > > > Then, in scripts/Makefile, > > > define filechk_build-salt.lds > { \ > echo "SECTIONS {"; \ > echo ".comment (INFO) : { LONG($(CONFIG_BUILD_ID_SALT)); }"; \ > echo "}"; \ > } > endef > > $(obj)/build-salt.lds: $(src)/Makefile FORCE > $(call filechk,build-salt.lds) > > > > > This is now so simple that we can even remove the shell script. I had not noticed the comments from Linus and Andy before I posted mine. Maybe, we should not add binary data into the .comment section. -- Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html