From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1BADC00144 for ; Mon, 1 Aug 2022 09:42:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230376AbiHAJmI (ORCPT ); Mon, 1 Aug 2022 05:42:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230174AbiHAJl6 (ORCPT ); Mon, 1 Aug 2022 05:41:58 -0400 Received: from conuserg-10.nifty.com (conuserg-10.nifty.com [210.131.2.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E33837192; Mon, 1 Aug 2022 02:41:57 -0700 (PDT) Received: from grover.sesame ([133.106.54.139]) (authenticated) by conuserg-10.nifty.com with ESMTP id 2719ejxu028043; Mon, 1 Aug 2022 18:40:45 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 2719ejxu028043 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1659346846; bh=t99GlSsT7vbIGrGiCUuJvD+nKsJBskTcdf/ObhFgXWI=; h=From:To:Cc:Subject:Date:From; b=YXzWfU9BtSCQtsx4ZQhSFcNG51BH/46O/St8t+dyveoQ/8SURDGcJ1v6ZnesvRR2e kXvgxlb60DftfQCVLDNpzHH3JBx6v8KSD5uxahsCWJXs/CwLleSUyfh5EpNhY5HaN2 z0J+1A2wR/ntMcjIiiVguF9zB06wPW7N6PEGnurWyJPde4HC5R+/jj2UQsUu4ANlWN 4595RoCYdCBqeIusgc8onF/VGIjrwgWdhZIiaxcppeVDi/sOJpsXl+3AVqEaiQI5gy d/n7mbv5l0F/nohGBCZbnDOxEbrwJSPvxjZk++cPB2NK4WeZ41ia/8upKoImF2t5pF DPl+6CcEZjTiw== X-Nifty-SrcIP: [133.106.54.139] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: Masahiro Yamada , Michal Marek , Nick Desaulniers , linux-kernel@vger.kernel.org Subject: [PATCH 1/4] modpost: shorten warning messages in report_sec_mismatch() Date: Mon, 1 Aug 2022 18:38:59 +0900 Message-Id: <20220801093902.1506297-1-masahiroy@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Each section mismatch results in long warning messages. Too much. Make each warning fit in one line, and remove a lot of messy code. Signed-off-by: Masahiro Yamada --- scripts/mod/modpost.c | 179 +++--------------------------------------- 1 file changed, 9 insertions(+), 170 deletions(-) diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index a8ee27496da7..9e8ae2636ec1 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1238,42 +1238,6 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr, return near; } -/* - * Convert a section name to the function/data attribute - * .init.text => __init - * .memexitconst => __memconst - * etc. - * - * The memory of returned value has been allocated on a heap. The user of this - * method should free it after usage. -*/ -static char *sec2annotation(const char *s) -{ - if (match(s, init_exit_sections)) { - char *p = NOFAIL(malloc(20)); - char *r = p; - - *p++ = '_'; - *p++ = '_'; - if (*s == '.') - s++; - while (*s && *s != '.') - *p++ = *s++; - *p = '\0'; - if (*s == '.') - s++; - if (strstr(s, "rodata") != NULL) - strcat(p, "const "); - else if (strstr(s, "data") != NULL) - strcat(p, "data "); - else - strcat(p, " "); - return r; - } else { - return NOFAIL(strdup("")); - } -} - static int is_function(Elf_Sym *sym) { if (sym) @@ -1282,19 +1246,6 @@ static int is_function(Elf_Sym *sym) return -1; } -static void print_section_list(const char * const list[20]) -{ - const char *const *s = list; - - while (*s) { - fprintf(stderr, "%s", *s); - s++; - if (*s) - fprintf(stderr, ", "); - } - fprintf(stderr, "\n"); -} - static inline void get_pretty_name(int is_func, const char** name, const char** name_p) { switch (is_func) { @@ -1312,141 +1263,31 @@ static inline void get_pretty_name(int is_func, const char** name, const char** static void report_sec_mismatch(const char *modname, const struct sectioncheck *mismatch, const char *fromsec, - unsigned long long fromaddr, const char *fromsym, - int from_is_func, - const char *tosec, const char *tosym, - int to_is_func) + const char *tosec, const char *tosym) { - const char *from, *from_p; - const char *to, *to_p; - char *prl_from; - char *prl_to; - sec_mismatch_count++; - get_pretty_name(from_is_func, &from, &from_p); - get_pretty_name(to_is_func, &to, &to_p); - - warn("%s(%s+0x%llx): Section mismatch in reference from the %s %s%s " - "to the %s %s:%s%s\n", - modname, fromsec, fromaddr, from, fromsym, from_p, to, tosec, - tosym, to_p); - switch (mismatch->mismatch) { case TEXT_TO_ANY_INIT: - prl_from = sec2annotation(fromsec); - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The function %s%s() references\n" - "the %s %s%s%s.\n" - "This is often because %s lacks a %s\n" - "annotation or the annotation of %s is wrong.\n", - prl_from, fromsym, - to, prl_to, tosym, to_p, - fromsym, prl_to, tosym); - free(prl_from); - free(prl_to); - break; - case DATA_TO_ANY_INIT: { - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The variable %s references\n" - "the %s %s%s%s\n" - "If the reference is valid then annotate the\n" - "variable with __init* or __refdata (see linux/init.h) " - "or name the variable:\n", - fromsym, to, prl_to, tosym, to_p); - print_section_list(mismatch->symbol_white_list); - free(prl_to); - break; - } + case DATA_TO_ANY_INIT: case TEXT_TO_ANY_EXIT: - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The function %s() references a %s in an exit section.\n" - "Often the %s %s%s has valid usage outside the exit section\n" - "and the fix is to remove the %sannotation of %s.\n", - fromsym, to, to, tosym, to_p, prl_to, tosym); - free(prl_to); - break; - case DATA_TO_ANY_EXIT: { - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The variable %s references\n" - "the %s %s%s%s\n" - "If the reference is valid then annotate the\n" - "variable with __exit* (see linux/init.h) or " - "name the variable:\n", - fromsym, to, prl_to, tosym, to_p); - print_section_list(mismatch->symbol_white_list); - free(prl_to); - break; - } + case DATA_TO_ANY_EXIT: case XXXINIT_TO_SOME_INIT: case XXXEXIT_TO_SOME_EXIT: - prl_from = sec2annotation(fromsec); - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The %s %s%s%s references\n" - "a %s %s%s%s.\n" - "If %s is only used by %s then\n" - "annotate %s with a matching annotation.\n", - from, prl_from, fromsym, from_p, - to, prl_to, tosym, to_p, - tosym, fromsym, tosym); - free(prl_from); - free(prl_to); - break; case ANY_INIT_TO_ANY_EXIT: - prl_from = sec2annotation(fromsec); - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The %s %s%s%s references\n" - "a %s %s%s%s.\n" - "This is often seen when error handling " - "in the init function\n" - "uses functionality in the exit path.\n" - "The fix is often to remove the %sannotation of\n" - "%s%s so it may be used outside an exit section.\n", - from, prl_from, fromsym, from_p, - to, prl_to, tosym, to_p, - prl_to, tosym, to_p); - free(prl_from); - free(prl_to); - break; case ANY_EXIT_TO_ANY_INIT: - prl_from = sec2annotation(fromsec); - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The %s %s%s%s references\n" - "a %s %s%s%s.\n" - "This is often seen when error handling " - "in the exit function\n" - "uses functionality in the init path.\n" - "The fix is often to remove the %sannotation of\n" - "%s%s so it may be used outside an init section.\n", - from, prl_from, fromsym, from_p, - to, prl_to, tosym, to_p, - prl_to, tosym, to_p); - free(prl_from); - free(prl_to); + warn("%s: section mismatch in reference: %s (section: %s) -> %s (section: %s)\n", + modname, fromsym, fromsec, tosym, tosec); break; case EXPORT_TO_INIT_EXIT: - prl_to = sec2annotation(tosec); - fprintf(stderr, - "The symbol %s is exported and annotated %s\n" - "Fix this by removing the %sannotation of %s " - "or drop the export.\n", - tosym, prl_to, prl_to, tosym); - free(prl_to); + warn("%s: EXPORT_SYMBOL used for init/exit symbol: %s (section: %s)\n", + modname, tosym, tosec); break; case EXTABLE_TO_NON_TEXT: - fatal("There's a special handler for this mismatch type, " - "we should never get here."); + fatal("There's a special handler for this mismatch type, we should never get here.\n"); break; } - fprintf(stderr, "\n"); } static void default_mismatch_handler(const char *modname, struct elf_info *elf, @@ -1470,9 +1311,7 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf, if (secref_whitelist(mismatch, fromsec, fromsym, tosec, tosym)) { report_sec_mismatch(modname, mismatch, - fromsec, r->r_offset, fromsym, - is_function(from), tosec, tosym, - is_function(to)); + fromsec, fromsym, tosec, tosym); } } -- 2.34.1