From patchwork Wed Nov 18 22:07:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11916011 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD382C64E69 for ; Wed, 18 Nov 2020 22:08:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7B85E206CA for ; Wed, 18 Nov 2020 22:08:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dbW3OmpX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727614AbgKRWI3 (ORCPT ); Wed, 18 Nov 2020 17:08:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726840AbgKRWH5 (ORCPT ); Wed, 18 Nov 2020 17:07:57 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B8CCC061A4D for ; Wed, 18 Nov 2020 14:07:56 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id o5so4511138ybe.12 for ; Wed, 18 Nov 2020 14:07:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=viQfWSBnWWQkhdsfshg6wjQjXkrLrUdatQTDtGtOjLo=; b=dbW3OmpXPLinNMGxA3qqhmIvkxGOzMc7C/RLfKw2PW/qdCHjGaq5Rs1hCGsIzYh/jX cUO3w+ryPubJXJGol/AuBCcRFfqimlfssxX4y6J+iwik+/cszhw9jew2aOb9Lmdvu7q3 qieIDuh+CLwus3Se4ineY0Vi/kyTjXVxXyZ5lorAi2Hmy7HlCWwt7n7Fopjj6RXhZLX7 kv5Z35uHWmDhqECCVyNr9OPFyUHAODR3hYTPnvLnPLJZNbu1ZVXJIfgazGluz4pgyU8J qMfDZ+fkDzZG6An4ZATuVPNoDZGPBmol5zRBPXVr5pn1bl81Wq0RE3gdh/WU/xznOT8P KR2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=viQfWSBnWWQkhdsfshg6wjQjXkrLrUdatQTDtGtOjLo=; b=X7UJZLCPEc+T/FL9r23/E/cd0VW8rlHxBFSEm4j9RjqWHWp+uTxsEIvo+dlfCCm3wP clkDc9qkVUwVmq8w6yObq4h9u1ghBj3n5cMYMa24pgpkq15pTszs6aYCumalTdi2qeei r0o4Io3mLLH3h6rHokxmVM+CLCllnNfbhVrNCYnv2p7qQQ34O9PACKvZ357ReZkqhjJA Rv3jSt9UBqCq1RtZtaOwfmNKUAeQSSDiq8eUiOGm0Nl6G/iRm93pOJwMR9S7iIbH1JRG 28JC2YcD9AaH9js/yxda8NSdpbfnzKgx8jLx+bRlfyeDKV4m4Q1kNDDzXerQ6Mt+Tm43 n0Pw== X-Gm-Message-State: AOAM530t7eMDr0zNZCH/VhOE0VdBhBTHk9z38HzyLBjJohSEwH3vXQMq xqBV7+AL9hLwuDEmP9lW8EFaQSax0r7rS3kRf6c= X-Google-Smtp-Source: ABdhPJzhC6bbGfgKTOT/DdbCJcRfllDjQ4hY6LJihFMdwChNr7SRK4RBgObFPHKV0TZJgGDSTsKPIHTsuMaflYXpbFA= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a25:9248:: with SMTP id e8mr12067724ybo.223.1605737275399; Wed, 18 Nov 2020 14:07:55 -0800 (PST) Date: Wed, 18 Nov 2020 14:07:24 -0800 In-Reply-To: <20201118220731.925424-1-samitolvanen@google.com> Message-Id: <20201118220731.925424-11-samitolvanen@google.com> Mime-Version: 1.0 References: <20201118220731.925424-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v7 10/17] modpost: lto: strip .lto from module names From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt , Will Deacon Cc: Josh Poimboeuf , Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org With LTO, everything is compiled into LLVM bitcode, so we have to link each module into native code before modpost. Kbuild uses the .lto.o suffix for these files, which also ends up in module information. This change strips the unnecessary .lto suffix from the module name. Suggested-by: Bill Wendling Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- scripts/mod/modpost.c | 16 +++++++--------- scripts/mod/modpost.h | 9 +++++++++ scripts/mod/sumversion.c | 6 +++++- 3 files changed, 21 insertions(+), 10 deletions(-) diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index f882ce0d9327..ebb15cc3f262 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -17,7 +17,6 @@ #include #include #include -#include #include #include "modpost.h" #include "../../include/linux/license.h" @@ -80,14 +79,6 @@ modpost_log(enum loglevel loglevel, const char *fmt, ...) exit(1); } -static inline bool strends(const char *str, const char *postfix) -{ - if (strlen(str) < strlen(postfix)) - return false; - - return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0; -} - void *do_nofail(void *ptr, const char *expr) { if (!ptr) @@ -1984,6 +1975,10 @@ static char *remove_dot(char *s) size_t m = strspn(s + n + 1, "0123456789"); if (m && (s[n + m] == '.' || s[n + m] == 0)) s[n] = 0; + + /* strip trailing .lto */ + if (strends(s, ".lto")) + s[strlen(s) - 4] = '\0'; } return s; } @@ -2007,6 +2002,9 @@ static void read_symbols(const char *modname) /* strip trailing .o */ tmp = NOFAIL(strdup(modname)); tmp[strlen(tmp) - 2] = '\0'; + /* strip trailing .lto */ + if (strends(tmp, ".lto")) + tmp[strlen(tmp) - 4] = '\0'; mod = new_module(tmp); free(tmp); } diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index 3aa052722233..fab30d201f9e 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -2,6 +2,7 @@ #include #include #include +#include #include #include #include @@ -180,6 +181,14 @@ static inline unsigned int get_secindex(const struct elf_info *info, return info->symtab_shndx_start[sym - info->symtab_start]; } +static inline bool strends(const char *str, const char *postfix) +{ + if (strlen(str) < strlen(postfix)) + return false; + + return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0; +} + /* file2alias.c */ extern unsigned int cross_build; void handle_moddevtable(struct module *mod, struct elf_info *info, diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c index d587f40f1117..760e6baa7eda 100644 --- a/scripts/mod/sumversion.c +++ b/scripts/mod/sumversion.c @@ -391,10 +391,14 @@ void get_src_version(const char *modname, char sum[], unsigned sumlen) struct md4_ctx md; char *fname; char filelist[PATH_MAX + 1]; + int postfix_len = 1; + + if (strends(modname, ".lto.o")) + postfix_len = 5; /* objects for a module are listed in the first line of *.mod file. */ snprintf(filelist, sizeof(filelist), "%.*smod", - (int)strlen(modname) - 1, modname); + (int)strlen(modname) - postfix_len, modname); buf = read_text_file(filelist);