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 2B544C47094 for ; Thu, 10 Jun 2021 06:05:50 +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 9B17C613C0 for ; Thu, 10 Jun 2021 06:05:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9B17C613C0 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]:37196 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lrDp6-0007Qv-Dv for qemu-devel@archiver.kernel.org; Thu, 10 Jun 2021 02:05:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45674) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrDiA-0002D0-Hl for qemu-devel@nongnu.org; Thu, 10 Jun 2021 01:58:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:31310) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lrDi8-0001P3-Af for qemu-devel@nongnu.org; Thu, 10 Jun 2021 01:58:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623304715; 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=MOKUaPRhEknQSp/c4EpmFfYQpAw20I4djJwTGWMwLZw=; b=ivlZ0RHZLsr65liCVV84EjDHuZD/sPK/1+JL51As1/YqdjVl1HJd4V+Q076FjZnrIuWpoL f7StO2UjgZsG2dkvTaCmwgvMcEpQAF+HA5DAba2JuvsVWa/C68LUtxca3epm4hcMswFnym NutpaGExJFlwC2YrjMSYc//Zt7tGqG8= 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-256-1sog8kXgOamP2KVkZx7mOA-1; Thu, 10 Jun 2021 01:58:32 -0400 X-MC-Unique: 1sog8kXgOamP2KVkZx7mOA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1E327800D62; Thu, 10 Jun 2021 05:58:31 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-113-69.ams2.redhat.com [10.36.113.69]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1AE2819C46; Thu, 10 Jun 2021 05:58:18 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 63E2E180093F; Thu, 10 Jun 2021 07:57:55 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH v2 03/18] modules: add qemu-modinfo utility Date: Thu, 10 Jun 2021 07:57:40 +0200 Message-Id: <20210610055755.538119-4-kraxel@redhat.com> In-Reply-To: <20210610055755.538119-1-kraxel@redhat.com> References: <20210610055755.538119-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 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=170.10.133.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.199, 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: Kevin Wolf , Thomas Huth , berrange@redhat.com, qemu-block@nongnu.org, "Michael S. Tsirkin" , Michael Roth , Cornelia Huck , Peter Lieven , Markus Armbruster , Max Reitz , Halil Pasic , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , qemu-s390x@nongnu.org, Gerd Hoffmann , Ronnie Sahlberg , Samuel Thibault , Paolo Bonzini , David Hildenbrand , Richard Henderson , Eric Blake , Christian Borntraeger Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Scan .modinfo sections of qemu modules, write module metadata to modinfo.json. Signed-off-by: Gerd Hoffmann --- qemu-modinfo.c | 270 +++++++++++++++++++++++++++++++++++++++++++++++++ meson.build | 11 ++ 2 files changed, 281 insertions(+) create mode 100644 qemu-modinfo.c diff --git a/qemu-modinfo.c b/qemu-modinfo.c new file mode 100644 index 000000000000..611dbdb00683 --- /dev/null +++ b/qemu-modinfo.c @@ -0,0 +1,270 @@ +/* + * 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 +#include + +#include "qapi/qapi-types-modules.h" +#include "qapi/qapi-visit-modules.h" +#include "qapi/qobject-output-visitor.h" +#include "qapi/qmp/qjson.h" +#include "qapi/qmp/qstring.h" + +#if INTPTR_MAX == INT32_MAX +# define Elf_Ehdr Elf32_Ehdr +# define Elf_Shdr Elf32_Shdr +# define ELFCLASS ELFCLASS32 +#elif INTPTR_MAX == INT64_MAX +# define Elf_Ehdr Elf64_Ehdr +# define Elf_Shdr Elf64_Shdr +# define ELFCLASS ELFCLASS64 +#else +# error Huh? Neither 32-bit nor 64-bit host. +#endif + +static const char *moddir = CONFIG_QEMU_MODDIR; +static const char *dsosuf = CONFIG_HOST_DSOSUF; + +static ModuleInfo *modinfo(const char *module, char *info, size_t size) +{ + ModuleInfo *modinfo; + strList *sl; + size_t pos = 0, len; + + modinfo = g_new0(ModuleInfo, 1); + modinfo->name = g_strdup(module); + + if (info) { + do { + if (strncmp(info + pos, "obj=", 4) == 0) { + sl = g_new0(strList, 1); + sl->value = g_strdup(info + pos + 4); + sl->next = modinfo->objs; + modinfo->objs = sl; + modinfo->has_objs = true; + } else if (strncmp(info + pos, "dep=", 4) == 0) { + sl = g_new0(strList, 1); + sl->value = g_strdup(info + pos + 4); + sl->next = modinfo->deps; + modinfo->deps = sl; + modinfo->has_deps = true; + } else if (strncmp(info + pos, "arch=", 5) == 0) { + modinfo->arch = g_strdup(info + pos + 5); + modinfo->has_arch = true; + } else if (strncmp(info + pos, "opts=", 5) == 0) { + modinfo->opts = g_strdup(info + pos + 5); + modinfo->has_opts = true; + } else { + fprintf(stderr, "unknown tag: %s\n", info + pos); + exit(1); + } + len = strlen(info + pos) + 1; + pos += len; + } while (pos < size); + } + + return modinfo; +} + +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 ModuleInfo *elf_parse_module(const char *module, + const char *filename) +{ + 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(filename, "r"); + if (NULL == fp) { + fprintf(stderr, "open %s: %s\n", filename, strerror(errno)); + exit(1); + } + + ret = fread(&ehdr, sizeof(ehdr), 1, fp); + if (ret != 1) { + fprintf(stderr, "read error (%s)\n", filename); + 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", filename); + exit(1); + } + if (ehdr.e_ident[EI_CLASS] != ELFCLASS64) { + fprintf(stderr, "elf class mismatch (%s)\n", filename); + exit(1); + } + if (ehdr.e_shoff == 0) { + fprintf(stderr, "no section header (%s)\n", filename); + exit(1); + } + + /* read string table */ + if (ehdr.e_shstrndx == 0) { + fprintf(stderr, "no section strings (%s)\n", filename); + exit(1); + } + str = elf_read_section(fp, &ehdr, ehdr.e_shstrndx, &str_size); + if (NULL == str) { + fprintf(stderr, "no section strings (%s)\n", filename); + 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); + } + } + fclose(fp); + + return modinfo(module, info, info_size); +} + +int main(int argc, char **argv) +{ + DIR *dir; + FILE *fp; + ModuleInfo *modinfo; + ModuleInfoList *modlist; + Modules *modules; + Visitor *v; + QObject *obj; + Error *errp = NULL; + struct dirent *ent; + char *ext, *file, *name; + GString *gjson; + QString *qjson; + const char *json; + + if (argc > 1) { + moddir = argv[1]; + } + + dir = opendir(moddir); + if (dir == NULL) { + fprintf(stderr, "opendir(%s): %s\n", moddir, strerror(errno)); + exit(1); + } + + modules = g_new0(Modules, 1); + while (NULL != (ent = readdir(dir))) { + ext = strrchr(ent->d_name, '.'); + if (!ext) { + continue; + } + if (strcmp(ext, dsosuf) != 0) { + continue; + } + + name = g_strndup(ent->d_name, ext - ent->d_name); + file = g_strdup_printf("%s/%s", moddir, ent->d_name); + modinfo = elf_parse_module(name, file); + g_free(file); + g_free(name); + + modlist = g_new0(ModuleInfoList, 1); + modlist->value = modinfo; + modlist->next = modules->list; + modules->list = modlist; + } + closedir(dir); + + v = qobject_output_visitor_new(&obj); + visit_type_Modules(v, NULL, &modules, &errp); + visit_complete(v, &obj); + visit_free(v); + + gjson = qobject_to_json(obj); + qjson = qstring_from_gstring(gjson); + json = qstring_get_str(qjson); + + file = g_strdup_printf("%s/modinfo.json", moddir); + fp = fopen(file, "w"); + if (fp == NULL) { + fprintf(stderr, "open(%s): %s\n", file, strerror(errno)); + exit(1); + } + fprintf(fp, "%s", json); + fclose(fp); + + printf("%s written\n", file); + g_free(file); + return 0; +} diff --git a/meson.build b/meson.build index d2a9ce91f556..9823c5889140 100644 --- a/meson.build +++ b/meson.build @@ -2380,6 +2380,17 @@ if xkbcommon.found() dependencies: [qemuutil, xkbcommon], install: have_tools) endif +if config_host.has_key('CONFIG_MODULES') + qemu_modinfo = executable('qemu-modinfo', files('qemu-modinfo.c') + genh, + dependencies: [glib, qemuutil], install: have_tools) + custom_target('modinfo.json', + input: [ softmmu_mods, block_mods ], + output: 'modinfo.json', + install: true, + install_dir: qemu_moddir, + command: [ qemu_modinfo, '.' ]) +endif + 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