From nobody Tue Dec 16 11:45:07 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1686157082; cv=none; d=zohomail.com; s=zohoarc; b=Ompl8jZz+UkP6181fEVP3q8TXNPi+gWkUMOtDOt4A5ElOIinxH6f9iKYdX/lQ/OAvpLKnen7INTuCUM+vG5VjfvqflHtMNKSw7kyXYs0tajwHkH+4hdt84eTtbcY7US6utvwETQL/bRz+OoECgXGOWSmBYJfFNR0yZ2kpG2fbRw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1686157082; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ruOmHOKIvXadvE8jXrAJUnNa6lotn9rQ25E1Fic8ZjU=; b=K6VDed/x+lbjv1dGis5R7HdBuzRczajsHeGExxk4DxqmYlUKEykJMvz6lJ7OtEOpJSzG9pKpCxF/gKSlc4k8d+i7H51QkDlNNHKo1Rf43uTlMDNgc6mqtdeWkOrp2e1GHFDUCTinAQC4/107BT137Ckbbsvl3GJaM5xyZod2VXQ= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1686157082455528.3256735912396; Wed, 7 Jun 2023 09:58:02 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q6wTo-0001KK-6m; Wed, 07 Jun 2023 12:57:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q6wTj-0001Dr-F5 for qemu-devel@nongnu.org; Wed, 07 Jun 2023 12:57:49 -0400 Received: from mail-yb1-xb2d.google.com ([2607:f8b0:4864:20::b2d]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1q6wTg-0001pJ-Tb for qemu-devel@nongnu.org; Wed, 07 Jun 2023 12:57:46 -0400 Received: by mail-yb1-xb2d.google.com with SMTP id 3f1490d57ef6-ba8cd61ee2dso1195274276.1 for ; Wed, 07 Jun 2023 09:57:44 -0700 (PDT) Received: from localhost.localdomain ([223.104.40.226]) by smtp.gmail.com with ESMTPSA id 30-20020a17090a001e00b00250bf8495b3sm1671808pja.39.2023.06.07.09.49.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jun 2023 09:49:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1686157063; x=1688749063; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ruOmHOKIvXadvE8jXrAJUnNa6lotn9rQ25E1Fic8ZjU=; b=a1i6bcHBBf1iIA37q/wV0LZZwmsX6IL7V42P+z22zyO+6Pbbk+4lmrooSpSlrLIZCA mwNLsvU7t1d8VzMEz+04Tpm8SyXsCddrOoxcF/8Z09KDNJQFDe9D2QoRRR38GZMzD2T4 CRp7FSQwemcJV/QMdh0vQhFHj+XWHj7Y1LBSVyvuhJxGa08CgZ4FZl8M+u5TGuNDt2s1 9khY0mShtYpH1OjwdPlrzWzs3kUXxQARRqTtCTUwhCm9qQXzg7kw0V7FIRduLUQwof6o eM3tGIWl3KUp1fZyEXBjTtTuS1CrZJiczakFGwURAqFgy7cEZLEGWys3C33bhNNs0Qjb iWnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686157063; x=1688749063; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ruOmHOKIvXadvE8jXrAJUnNa6lotn9rQ25E1Fic8ZjU=; b=YZYQpY31FhHPtk4EtqAJpgKQnVWfRxj0r0hZxaQfCZhg3tMm4cyyk5tpYc7GDzA1vq MEclizM+Fpnn1yPcMc5SCKsI9/LEW9YFj21FJUJbfhrXk8GluDtif3m/yOH9xOZelF0n sR3XKZxOgTfK7Dhqzc6V9meYMSsdxyZHHAjKIn2Ke4IY7pP0mAeMmI//rkYolOuzTt4d 8HTKzhO4cBkNbymgj4opgxeQ5LRIQdTBv++90BEeSyIv1lVY70Cyd1kIkJ5mL6ur4cqb xPCWtMefL04Vi0HLSDxJCGDBzfW8vDPqk2gM8YYzdDFewXLz3SurxX9rinz9SnGweZvB hVlA== X-Gm-Message-State: AC+VfDwfvTOlRQrO+xrgSVH23DGvqPhjpJW9xSOAFNhBOSpuWOCZgZkM ePeJYZdXE4eA0pVGs5Y2JaFzsTOx8SmE0ZmJx+g= X-Google-Smtp-Source: ACHHUZ7Mh4Si2nhbjlq9k0Z/+l+JZW0lmWKMdldsfKNH9j1sjxjMr0mtgTGrd4mtBUG0OknNmPJhbA== X-Received: by 2002:a17:90b:8d7:b0:256:7866:8c06 with SMTP id ds23-20020a17090b08d700b0025678668c06mr17008900pjb.19.1686156573350; Wed, 07 Jun 2023 09:49:33 -0700 (PDT) From: Yeqi Fu To: alex.bennee@linaro.org Cc: richard.henderson@linaro.org, qemu-devel@nongnu.org, Yeqi Fu , Laurent Vivier Subject: [RFC v2 6/6] linux-user: Add '-native-bypass' option Date: Thu, 8 Jun 2023 00:47:50 +0800 Message-Id: <20230607164750.829586-7-fufuyqqqqqq@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230607164750.829586-1-fufuyqqqqqq@gmail.com> References: <20230607164750.829586-1-fufuyqqqqqq@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::b2d; envelope-from=fufuyqqqqqq@gmail.com; helo=mail-yb1-xb2d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1686157083661100001 Content-Type: text/plain; charset="utf-8" Signed-off-by: Yeqi Fu --- include/qemu/envlist.h | 1 + linux-user/main.c | 23 +++++++++++++++++ util/envlist.c | 56 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 80 insertions(+) diff --git a/include/qemu/envlist.h b/include/qemu/envlist.h index 6006dfae44..865eb18e17 100644 --- a/include/qemu/envlist.h +++ b/include/qemu/envlist.h @@ -7,6 +7,7 @@ envlist_t *envlist_create(void); void envlist_free(envlist_t *); int envlist_setenv(envlist_t *, const char *); int envlist_unsetenv(envlist_t *, const char *); +int envlist_appendenv(envlist_t *, const char *, const char *); int envlist_parse_set(envlist_t *, const char *); int envlist_parse_unset(envlist_t *, const char *); char **envlist_to_environ(const envlist_t *, size_t *); diff --git a/linux-user/main.c b/linux-user/main.c index 5e6b2e1714..313c116b3b 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -125,6 +125,8 @@ static void usage(int exitcode); static const char *interp_prefix =3D CONFIG_QEMU_INTERP_PREFIX; const char *qemu_uname_release; =20 +static const char *native_lib; + #if !defined(TARGET_DEFAULT_STACK_SIZE) /* XXX: on x86 MAP_GROWSDOWN only works if ESP <=3D address + 32, so we allocate a bigger stack. Need a better solution, for example @@ -293,6 +295,13 @@ static void handle_arg_set_env(const char *arg) free(r); } =20 +#if defined(CONFIG_USER_ONLY) && defined(CONFIG_USER_NATIVE_CALL) +static void handle_arg_native_bypass(const char *arg) +{ + native_lib =3D arg; +} +#endif + static void handle_arg_unset_env(const char *arg) { char *r, *p, *token; @@ -522,6 +531,10 @@ static const struct qemu_argument arg_table[] =3D { "", "Generate a /tmp/perf-${pid}.map file for perf"}, {"jitdump", "QEMU_JITDUMP", false, handle_arg_jitdump, "", "Generate a jit-${pid}.dump file for perf"}, +#if defined(CONFIG_USER_ONLY) && defined(CONFIG_USER_NATIVE_CALL) + {"native-bypass", "QEMU_NATIVE_BYPASS", true, handle_arg_native_bypass, + "", "native bypass for library calls in user mode only."}, +#endif {NULL, NULL, false, NULL, NULL, NULL} }; =20 @@ -826,6 +839,16 @@ int main(int argc, char **argv, char **envp) } } =20 + /* Set the library for native bypass */ + if (native_lib !=3D NULL) { + char *token =3D malloc(strlen(native_lib) + 12); + strcpy(token, "LD_PRELOAD=3D"); + strcat(token, native_lib); + if (envlist_appendenv(envlist, token, ":") !=3D 0) { + usage(EXIT_FAILURE); + } + } + target_environ =3D envlist_to_environ(envlist, NULL); envlist_free(envlist); =20 diff --git a/util/envlist.c b/util/envlist.c index db937c0427..713d52497e 100644 --- a/util/envlist.c +++ b/util/envlist.c @@ -201,6 +201,62 @@ envlist_unsetenv(envlist_t *envlist, const char *env) return (0); } =20 +/* + * Appends environment value to envlist. If the environment + * variable already exists, the new value is appended to the + * existing one. + * + * Returns 0 in success, errno otherwise. + */ +int +envlist_appendenv(envlist_t *envlist, const char *env, const char *separat= or) +{ + struct envlist_entry *entry =3D NULL; + const char *eq_sign; + size_t envname_len; + + if ((envlist =3D=3D NULL) || (env =3D=3D NULL)) { + return (EINVAL); + } + + /* find out first equals sign in given env */ + eq_sign =3D strchr(env, '=3D'); + if (eq_sign =3D=3D NULL) { + return (EINVAL); + } + envname_len =3D eq_sign - env + 1; + + /* + * If there already exists variable with given name, + * we append the new value to the existing one. + */ + for (entry =3D envlist->el_entries.lh_first; entry !=3D NULL; + entry =3D entry->ev_link.le_next) { + if (strncmp(entry->ev_var, env, envname_len) =3D=3D 0) { + break; + } + } + + if (entry !=3D NULL) { + char *new_env_value =3D NULL; + size_t new_env_len =3D strlen(entry->ev_var) + strlen(eq_sign) + + strlen(separator) + 1; + new_env_value =3D g_malloc(new_env_len); + strcpy(new_env_value, entry->ev_var); + strcat(new_env_value, separator); + strcat(new_env_value, eq_sign + 1); + g_free((char *)entry->ev_var); + entry->ev_var =3D new_env_value; + } else { + envlist->el_count++; + entry =3D g_malloc(sizeof(*entry)); + entry->ev_var =3D g_strdup(env); + QLIST_INSERT_HEAD(&envlist->el_entries, entry, ev_link); + } + + return (0); +} + /* * Returns given envlist as array of strings (in same form that * global variable environ is). Caller must free returned memory --=20 2.34.1