From: Nick Desaulniers <ndesaulniers@google.com>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nicolas@fjasle.eu>
Subject: Re: [PATCH v6 06/20] modpost: unify 'sym' and 'to' in default_mismatch_handler()
Date: Mon, 22 May 2023 11:23:04 -0700 [thread overview]
Message-ID: <CAKwvOd=rV7gR9kpS3-qCH_H30PurGhoz5OmF5R3b7KvWBpqVCg@mail.gmail.com> (raw)
In-Reply-To: <20230521160426.1881124-7-masahiroy@kernel.org>
On Sun, May 21, 2023 at 9:05 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> find_tosym() takes 'sym' and stores the return value to another
> variable 'to'. You can use the same variable because we want to
> replace the original one when appropriate.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Thanks for the patch!
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
> ---
>
> scripts/mod/modpost.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 6ac0d571542c..7848bacd4b42 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -1166,11 +1166,10 @@ static bool is_executable_section(struct elf_info *elf, unsigned int secndx)
>
> static void default_mismatch_handler(const char *modname, struct elf_info *elf,
> const struct sectioncheck* const mismatch,
> - Elf_Rela *r, Elf_Sym *sym,
> + Elf_Rela *r, Elf_Sym *tsym,
> unsigned int fsecndx, const char *fromsec,
> const char *tosec)
> {
> - Elf_Sym *to;
> Elf_Sym *from;
> const char *tosym;
> const char *fromsym;
> @@ -1178,8 +1177,8 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
> from = find_fromsym(elf, r->r_offset, fsecndx);
> fromsym = sym_name(elf, from);
>
> - to = find_tosym(elf, r->r_addend, sym);
> - tosym = sym_name(elf, to);
> + tsym = find_tosym(elf, r->r_addend, tsym);
> + tosym = sym_name(elf, tsym);
>
> /* check whitelist - we may ignore it */
> if (!secref_whitelist(fromsec, fromsym, tosec, tosym))
> @@ -1214,7 +1213,7 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
> "You might get more information about where this is\n"
> "coming from by using scripts/check_extable.sh %s\n",
> fromsec, (long)r->r_offset, tosec, modname);
> - else if (is_executable_section(elf, get_secindex(elf, sym)))
> + else if (is_executable_section(elf, get_secindex(elf, tsym)))
> warn("The relocation at %s+0x%lx references\n"
> "section \"%s\" which is not in the list of\n"
> "authorized sections. If you're adding a new section\n"
> --
> 2.39.2
>
--
Thanks,
~Nick Desaulniers
next prev parent reply other threads:[~2023-05-22 18:23 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-21 16:04 [PATCH v6 00/20] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 01/20] Revert "modpost: skip ELF local symbols during section mismatch check" Masahiro Yamada
2023-05-22 17:42 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 02/20] modpost: fix section mismatch message for R_ARM_ABS32 Masahiro Yamada
2023-05-22 17:56 ` Nick Desaulniers
2023-05-22 21:35 ` Ard Biesheuvel
2023-05-23 5:07 ` Masahiro Yamada
2023-05-23 7:13 ` Ard Biesheuvel
2023-05-21 16:04 ` [PATCH v6 03/20] modpost: detect section mismatch for R_ARM_MOVW_ABS_NC and R_ARM_MOVT_ABS Masahiro Yamada
2023-05-22 18:03 ` Nick Desaulniers
2023-05-22 21:50 ` Ard Biesheuvel
2023-05-23 11:58 ` Masahiro Yamada
2023-05-23 12:20 ` Ard Biesheuvel
2023-05-24 0:02 ` Masahiro Yamada
2023-05-24 0:04 ` Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 04/20] modpost: remove unused argument from secref_whitelist() Masahiro Yamada
2023-05-22 18:10 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 05/20] modpost: refactor find_fromsym() and find_tosym() Masahiro Yamada
2023-05-22 18:18 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 06/20] modpost: unify 'sym' and 'to' in default_mismatch_handler() Masahiro Yamada
2023-05-22 18:23 ` Nick Desaulniers [this message]
2023-05-21 16:04 ` [PATCH v6 07/20] modpost: replace r->r_offset, r->r_addend with faddr, taddr Masahiro Yamada
2023-05-22 18:31 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 08/20] modpost: remove is_shndx_special() check from section_rel(a) Masahiro Yamada
2023-05-25 17:20 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 09/20] modpost: pass struct module pointer to check_section_mismatch() Masahiro Yamada
2023-05-25 17:23 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 10/20] kbuild: generate KSYMTAB entries by modpost Masahiro Yamada
2023-05-25 17:50 ` Nick Desaulniers
2023-06-02 13:51 ` Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 11/20] ia64,export.h: replace EXPORT_DATA_SYMBOL* with EXPORT_SYMBOL* Masahiro Yamada
2023-05-25 17:52 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 12/20] modpost: check static EXPORT_SYMBOL* by modpost again Masahiro Yamada
2023-05-25 18:18 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 13/20] modpost: squash sym_update_namespace() into sym_add_exported() Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 14/20] modpost: use null string instead of NULL pointer for default namespace Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 15/20] kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion Masahiro Yamada
2023-05-25 18:14 ` Nick Desaulniers
2023-05-28 7:40 ` Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 16/20] modpost: merge fromsec=DATA_SECTIONS entries in sectioncheck table Masahiro Yamada
2023-05-25 18:30 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 17/20] modpost: merge bad_tosec=ALL_EXIT_SECTIONS " Masahiro Yamada
2023-05-25 18:36 ` Nick Desaulniers
2023-05-28 16:43 ` Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 18/20] modpost: remove *_sections[] arrays Masahiro Yamada
2023-05-21 16:04 ` [PATCH v6 19/20] modpost: merge two similar section mismatch warnings Masahiro Yamada
2023-05-25 18:20 ` Nick Desaulniers
2023-05-21 16:04 ` [PATCH v6 20/20] modpost: show offset from symbol for " Masahiro Yamada
2023-05-25 18:26 ` Nick Desaulniers
2023-05-28 7:29 ` Masahiro Yamada
2023-05-22 1:47 ` [PATCH v6 00/20] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS Masahiro Yamada
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