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 X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 68C63C47083 for ; Wed, 2 Jun 2021 09:20:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E152A613D6 for ; Wed, 2 Jun 2021 09:20:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E152A613D6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:41362 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1loN2i-00060s-W5 for qemu-devel@archiver.kernel.org; Wed, 02 Jun 2021 05:20:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55722) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1loN0U-0001rs-Tu for qemu-devel@nongnu.org; Wed, 02 Jun 2021 05:17:46 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:38320) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1loN0M-000297-Nt for qemu-devel@nongnu.org; Wed, 02 Jun 2021 05:17:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622625456; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RM5MHuSldTCJkVJYzW/tgcOS3v6/2/Fa9OcJ8hyKu9s=; b=Pp9kCo/bAy8zSnC8uZSZxFqlcPYv+HNM47yLvniCcrd8N5JZKN3ofJUprB/QwHcboAx/BR E8SSz7hCJ2C1ohXxjAfdzYKuve3Fm6AE1zIl5WJHKxdOQ/edHZgRBS7jzCsB0IFTtgLTGq kfgG9PdNvxXPImsVwBIjnU2ai5I/wJo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-403-DPpB68pnNBW4EBRy3ipq3w-1; Wed, 02 Jun 2021 05:17:33 -0400 X-MC-Unique: DPpB68pnNBW4EBRy3ipq3w-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 40207107ACE3; Wed, 2 Jun 2021 09:17:31 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-112-84.ams2.redhat.com [10.36.112.84]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C47345D9D0; Wed, 2 Jun 2021 09:17:30 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 91EC1180087E; Wed, 2 Jun 2021 11:17:27 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH 2/9] add qemu-modinfo utility Date: Wed, 2 Jun 2021 11:17:20 +0200 Message-Id: <20210602091727.1023563-3-kraxel@redhat.com> In-Reply-To: <20210602091727.1023563-1-kraxel@redhat.com> References: <20210602091727.1023563-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.371, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , berrange@redhat.com, David Hildenbrand , Cornelia Huck , Richard Henderson , armbru@redhat.com, Halil Pasic , Christian Borntraeger , qemu-s390x@nongnu.org, Paolo Bonzini , "Michael S. Tsirkin" , Gerd Hoffmann , Samuel Thibault , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" For now only dump metadata. TODO: * store in some file format (json?). * make qemu parse it, replace hard-coded lists in util/module.c * fix windows (seems to not have glob). * do we need non-elf support? Signed-off-by: Gerd Hoffmann --- qemu-modinfo.c | 182 +++++++++++++++++++++++++++++++++++++++++++++++++ meson.build | 3 + 2 files changed, 185 insertions(+) create mode 100644 qemu-modinfo.c diff --git a/qemu-modinfo.c b/qemu-modinfo.c new file mode 100644 index 000000000000..ecd5f6c3adf2 --- /dev/null +++ b/qemu-modinfo.c @@ -0,0 +1,182 @@ +/* + * QEMU module parser + * + * read modules, find modinfo section, parse & store metadata. + * + * Copyright Red Hat, Inc. 2021 + * + * Authors: + * Gerd Hoffmann + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include "qemu/osdep.h" +#include "elf.h" +#include + +#define Elf_Ehdr Elf64_Ehdr +#define Elf_Shdr Elf64_Shdr +#define ELFCLASS ELFCLASS64 + +static const char *moddir = CONFIG_QEMU_MODDIR; +static const char *dsosuf = CONFIG_HOST_DSOSUF; + +static void modinfo(const char *module, char *info, size_t size) +{ + size_t pos = 0, len; + + fprintf(stderr, "%s\n", module); + do { + fprintf(stderr, " -> %s\n", info + pos); + len = strlen(info + pos) + 1; + pos += len; + } while (pos < size); +} + +static void elf_read_section_hdr(FILE *fp, Elf_Ehdr *ehdr, + int section, Elf_Shdr *shdr) +{ + size_t pos, len; + int ret; + + pos = ehdr->e_shoff + section * ehdr->e_shentsize; + len = MIN(ehdr->e_shentsize, sizeof(*shdr)); + + ret = fseek(fp, pos, SEEK_SET); + if (ret != 0) { + fprintf(stderr, "seek error\n"); + exit(1); + } + + memset(shdr, 0, sizeof(*shdr)); + ret = fread(shdr, len, 1, fp); + if (ret != 1) { + fprintf(stderr, "read error\n"); + exit(1); + } +} + +static void *elf_read_section(FILE *fp, Elf_Ehdr *ehdr, + int section, size_t *size) +{ + Elf_Shdr shdr; + void *data; + int ret; + + elf_read_section_hdr(fp, ehdr, section, &shdr); + if (shdr.sh_offset && shdr.sh_size) { + ret = fseek(fp, shdr.sh_offset, SEEK_SET); + if (ret != 0) { + fprintf(stderr, "seek error\n"); + exit(1); + } + + data = g_malloc(shdr.sh_size); + ret = fread(data, shdr.sh_size, 1, fp); + if (ret != 1) { + fprintf(stderr, "read error\n"); + exit(1); + } + *size = shdr.sh_size; + } else { + data = NULL; + *size = 0; + } + return data; +} + +static void elf_parse_module(const char *module) +{ + Elf_Ehdr ehdr; + Elf_Shdr shdr; + FILE *fp; + int ret, i; + char *str; + size_t str_size; + char *info; + size_t info_size; + + fp = fopen(module, "r"); + if (NULL == fp) { + fprintf(stderr, "open %s: %s\n", module, strerror(errno)); + exit(1); + } + + ret = fread(&ehdr, sizeof(ehdr), 1, fp); + if (ret != 1) { + fprintf(stderr, "read error (%s)\n", module); + exit(1); + } + + if (ehdr.e_ident[EI_MAG0] != ELFMAG0 || + ehdr.e_ident[EI_MAG1] != ELFMAG1 || + ehdr.e_ident[EI_MAG2] != ELFMAG2 || + ehdr.e_ident[EI_MAG3] != ELFMAG3) { + fprintf(stderr, "not an elf file (%s)\n", module); + exit(1); + } + if (ehdr.e_ident[EI_CLASS] != ELFCLASS64) { + fprintf(stderr, "elf class mismatch (%s)\n", module); + exit(1); + } + if (ehdr.e_shoff == 0) { + fprintf(stderr, "no section header (%s)\n", module); + exit(1); + } + + /* read string table */ + if (ehdr.e_shstrndx == 0) { + fprintf(stderr, "no section strings (%s)\n", module); + exit(1); + } + str = elf_read_section(fp, &ehdr, ehdr.e_shstrndx, &str_size); + if (NULL == str) { + fprintf(stderr, "no section strings (%s)\n", module); + exit(1); + } + + /* find and read modinfo section */ + info = NULL; + for (i = 0; i < ehdr.e_shnum; i++) { + elf_read_section_hdr(fp, &ehdr, i, &shdr); + if (!shdr.sh_name) { + continue; + } + if (strcmp(str + shdr.sh_name, ".modinfo") == 0) { + info = elf_read_section(fp, &ehdr, i, &info_size); + } + } + + if (info) { + modinfo(module, info, info_size); + } + + fclose(fp); +} + +int main(int argc, char **argv) +{ + char *pattern; + glob_t files; + int ret, i; + + if (argc > 1) { + moddir = argv[1]; + } + + pattern = g_strdup_printf("%s/*%s", moddir, dsosuf); + ret = glob(pattern, 0, NULL, &files); + if (ret != 0) { + fprintf(stderr, "glob(%s) failed: %d\n", pattern, ret); + exit(1); + } + + for (i = 0; i < files.gl_pathc; i++) { + elf_parse_module(files.gl_pathv[i]); + } + + globfree(&files); + g_free(pattern); + return 0; +} diff --git a/meson.build b/meson.build index a45f1a844f13..179e92aa7ae1 100644 --- a/meson.build +++ b/meson.build @@ -2358,6 +2358,9 @@ if xkbcommon.found() dependencies: [qemuutil, xkbcommon], install: have_tools) endif +qemu_modinfo = executable('qemu-modinfo', files('qemu-modinfo.c') + genh, + dependencies: [glib], install: have_tools) + if have_tools qemu_img = executable('qemu-img', [files('qemu-img.c'), hxdep], dependencies: [authz, block, crypto, io, qom, qemuutil], install: true) -- 2.31.1