From patchwork Fri Dec 16 22:17:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allen Webb X-Patchwork-Id: 13075541 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 E6CB6C3DA78 for ; Fri, 16 Dec 2022 22:17:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229678AbiLPWR2 (ORCPT ); Fri, 16 Dec 2022 17:17:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229995AbiLPWRX (ORCPT ); Fri, 16 Dec 2022 17:17:23 -0500 Received: from mail-il1-x14a.google.com (mail-il1-x14a.google.com [IPv6:2607:f8b0:4864:20::14a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1874327CF5 for ; Fri, 16 Dec 2022 14:17:22 -0800 (PST) Received: by mail-il1-x14a.google.com with SMTP id 7-20020a056e0220c700b0030386f0d0e6so2484226ilq.3 for ; Fri, 16 Dec 2022 14:17:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=G0/vtfeve/G9ydeke/gLh4oQEre+L13iDXwcfVwzkg8=; b=XuNwKmwPpNlfKES3zcBJOF59W0eZv2AMPYDbfitG7Ycy+a7Q8uZ5QCspwLjWD88r4N qNEl4O2mUAUamEUPN2f4xsKafyXL5LRghVfKvYYYkihHNyh/fjFCWr4roR2GazK/JIPT SD0xAPysuyXz0C/a5JxcHcz76ur05fNnHe53fXhRx15SQ1eGnqGenRPXKcBwY0enWofR 0fWkGOzlCjCBHavz7gOEclKO4CHaxd3tBdECRyE7nciqto1C2kIiHJfMhdsEv1Do0QJA m9iI/5kMYVVHZ8qMSWC4P15VHtu//B+FQXkpMrwUaM80OPXVP/RSbuK8Wyw+OnrTevgz 4m6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=G0/vtfeve/G9ydeke/gLh4oQEre+L13iDXwcfVwzkg8=; b=xaS9BQ181Ma1zAS83mZhWQey3uNJiLknkQaNjdNDTVCftMgshKekucAvpjMRc2olD4 u/00PMzZ/BRTTNtSSLD7fJTv29buoEHiZrYf3jURIvxlC0KY9okr+yG3Od23Kp74hyMj APpLJUz44Rm5hlU5LvxcH5Si6L716bASzfBaGKUypEMpCTsp8n/biIi+7cEXFf8E7mGd LNs6v7XSjmPtxi73EsVU0D2aU2NrksHo/GrYeJi1GRdN/31g6iOxcv9KX0cEf7VCKoul R/K3snQLocwffHuibPVUT24CKBIWXzFuGlUZxjZ8FNIckj3OycjYGciFCrwV7w8QUq6V qQ9Q== X-Gm-Message-State: ANoB5plk8TWg+mKFbX6VIErmC4Bf4x14RSXciqKGwcmbjzM1shi7JpHk gtuVyio3EenedPAvJCgwtcXIzrD19fFsaGs= X-Google-Smtp-Source: AA0mqf4UC/atAEdUb3Vl1JsfM1S7LbbKzn42gA1tVwXLOEl9Tg/CF2eeuhJLDOljn5iQSGJpHZxlAN8xlh4egrw= X-Received: from allenwebb.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:12e8]) (user=allenwebb job=sendgmr) by 2002:a05:6602:2bf0:b0:6e2:c12d:571e with SMTP id d16-20020a0566022bf000b006e2c12d571emr4547416ioy.32.1671229042549; Fri, 16 Dec 2022 14:17:22 -0800 (PST) Date: Fri, 16 Dec 2022 16:17:00 -0600 In-Reply-To: <20221216221703.294683-1-allenwebb@google.com> Mime-Version: 1.0 References: <20221216221703.294683-1-allenwebb@google.com> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog Message-ID: <20221216221703.294683-3-allenwebb@google.com> Subject: [PATCH v7 2/5] modpost: Track module name for built-in modules From: Allen Webb To: "linux-modules@vger.kernel.org" , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" Cc: Luis Chamberlain , Greg Kroah-Hartman , "Rafael J. Wysocki" , Allen Webb Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Keep track of the module name when processing match table symbols. Signed-off-by: Allen Webb --- scripts/mod/file2alias.c | 37 +++++++++++++++++++++++++++++++++---- scripts/mod/modpost.h | 1 + 2 files changed, 34 insertions(+), 4 deletions(-) diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 80d973144fded..458e41ae0f5f1 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -28,6 +28,7 @@ typedef Elf64_Addr kernel_ulong_t; #include #endif +#include #include #include @@ -1540,9 +1541,9 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, Elf_Sym *sym, const char *symname) { void *symval; - char *zeros = NULL; - const char *name, *identifier; - unsigned int namelen; + char *zeros = NULL, *modname_str = NULL; + const char *name, *identifier, *modname; + unsigned int namelen, modnamelen; /* We're looking for a section relative symbol */ if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) @@ -1552,7 +1553,11 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT) return; - /* All our symbols are of form __mod____device_table. */ + /* All our symbols are either of form + * __mod____device_table + * or + * __mod_____kmod__device_table + */ if (strncmp(symname, "__mod_", strlen("__mod_"))) return; name = symname + strlen("__mod_"); @@ -1564,8 +1569,29 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, identifier = strstr(name, "__"); if (!identifier) return; + modnamelen = namelen; namelen = identifier - name; + /* In the vmlinuz.o case we want to handle __kmod_ so aliases from + * builtin modules are attributed correctly. + */ + modname = strstr(identifier + 2, "__kmod_"); + if (modname) { + modname += strlen("__kmod_"); + modnamelen -= (modname - name) + strlen("_device_table"); + modname_str = malloc(modnamelen + 1); + /* We don't want to continue if the allocation fails. */ + assert(modname_str); + memcpy(modname_str, modname, modnamelen); + modname_str[modnamelen] = '\0'; + } + + if (modname_str) + modname = modname_str; + else + modname = mod->name; + mod->builtin_name = modname; + /* Handle all-NULL symbols allocated into .bss */ if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { zeros = calloc(1, sym->st_size); @@ -1597,6 +1623,9 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, } } free(zeros); + mod->builtin_name = NULL; + if (modname_str) + free(modname_str); } /* Now add out buffered information to the generated C source */ diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index 1178f40a73f3d..34fe5fc0b02cb 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -128,6 +128,7 @@ struct module { struct list_head missing_namespaces; // Actual imported namespaces struct list_head imported_namespaces; + const char *builtin_name; char name[]; };