linux-kernel - Re: [PATCH] kbuild: dummy-tools: Add support for -fpatchable-function-entry

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Message-ID: <CAK7LNAQRQ41bXiBFViXE94gObx+3qu5xQxWTXKfO6NYj=v0=9A@mail.gmail.com>
Date:   Tue, 31 Oct 2023 15:08:53 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Michal Suchanek <msuchanek@...e.de>
Cc:     linux-kbuild@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Naveen N Rao <naveen@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kbuild: dummy-tools: Add support for -fpatchable-function-entry

On Mon, Oct 30, 2023 at 5:32 PM Michal Suchanek <msuchanek@...e.de> wrote:
>
> dummy-gcc does not produce the output
> gcc-check-fpatchable-function-entry.sh expects. Add a base64 encoded
> output of the second test.
>
> Fixes: 0f71dcfb4aef ("powerpc/ftrace: Add support for -fpatchable-function-entry")
> Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> ---



I prefer this one
https://lore.kernel.org/linux-kbuild/20231030113416.5208-1-jirislaby@kernel.org/T/#u


Does it work for you?





>  scripts/dummy-tools/gcc | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
> index 07f6dc4c5cf6..8ab81a905cc2 100755
> --- a/scripts/dummy-tools/gcc
> +++ b/scripts/dummy-tools/gcc
> @@ -73,6 +73,25 @@ if arg_contain -Wa,--version "$@"; then
>         exit 0
>  fi
>
> +if arg_contain -fpatchable-function-entry=2 "$@"; then
> +       base64 -d <<-EOF
> +       CS5maWxlCSI8c3RkaW4+IgoJLm1hY2hpbmUgcG93ZXI4CgkuYWJpdmVyc2lvbiAyCgkuc2VjdGlv
> +       bgkiLnRleHQiCgkuYWxpZ24gMgoJLnAyYWxpZ24gNCwsMTUKCS5nbG9ibCBmdW5jCgkudHlwZQlm
> +       dW5jLCBAZnVuY3Rpb24KZnVuYzoKLkxGQjA6CgkuY2ZpX3N0YXJ0cHJvYwouTENGMDoKMDoJYWRk
> +       aXMgMiwxMiwuVE9DLi0uTENGMEBoYQoJYWRkaSAyLDIsLlRPQy4tLkxDRjBAbAoJLmxvY2FsZW50
> +       cnkJZnVuYywuLWZ1bmMKCS5zZWN0aW9uCV9fcGF0Y2hhYmxlX2Z1bmN0aW9uX2VudHJpZXMsImF3
> +       byIsQHByb2diaXRzLC5MUEZFMAoJLmFsaWduIDMKCS44Ynl0ZQkuTFBGRTAKCS5zZWN0aW9uCSIu
> +       dGV4dCIKLkxQRkUwOgoJbm9wCglub3AKCWFkZGlzIDksMiwuTEFOQ0hPUjBAdG9jQGhhCglsd2Eg
> +       MywuTEFOQ0hPUjBAdG9jQGwoOSkKCWJscgoJLmxvbmcgMAoJLmJ5dGUgMCwwLDAsMCwwLDAsMCww
> +       CgkuY2ZpX2VuZHByb2MKLkxGRTA6Cgkuc2l6ZQlmdW5jLC4tZnVuYwoJLmdsb2JsIHgKCS5zZWN0
> +       aW9uCSIuYnNzIgoJLmFsaWduIDIKCS5zZXQJLkxBTkNIT1IwLC4gKyAwCgkudHlwZQl4LCBAb2Jq
> +       ZWN0Cgkuc2l6ZQl4LCA0Cng6CgkuemVybwk0CgkuaWRlbnQJIkdDQzogKFNVU0UgTGludXgpIDEz
> +       LjIuMSAyMDIzMDkxMiBbcmV2aXNpb24gYjk2ZTY2ZmQ0ZWYzZTM2OTgzOTY5ZmI4Y2RkMTk1NmY1
> +       NTFhMDc0Yl0iCgkuc2VjdGlvbgkubm90ZS5HTlUtc3RhY2ssIiIsQHByb2diaXRzCg==
> +       EOF
> +       exit 0
> +fi
> +
>  if arg_contain -S "$@"; then
>         # For scripts/gcc-x86-*-has-stack-protector.sh
>         if arg_contain -fstack-protector "$@"; then
> --
> 2.42.0
>


-- 
Best Regards
Masahiro Yamada