From patchwork Wed Oct 21 17:37:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 1385686 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=e8Tc/R58; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4CGdSy59XMz9sSG for ; Thu, 22 Oct 2020 04:55:46 +1100 (AEDT) Received: from localhost ([::1]:49690 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kVIKt-0007Zn-JE for incoming@patchwork.ozlabs.org; Wed, 21 Oct 2020 13:55:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51810) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVI3u-0006Yd-V5 for qemu-devel@nongnu.org; Wed, 21 Oct 2020 13:38:10 -0400 Received: from mail-pj1-x1043.google.com ([2607:f8b0:4864:20::1043]:39837) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kVI3n-0006Sj-Cw for qemu-devel@nongnu.org; Wed, 21 Oct 2020 13:38:10 -0400 Received: by mail-pj1-x1043.google.com with SMTP id m3so408181pjf.4 for ; Wed, 21 Oct 2020 10:38:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=XLExgzrLRIoZ+1AkNjtHtGQ6oai05Dc/yN88SMU2dO4=; b=e8Tc/R58wCdYTQ2hvOg04zN84/j1Ce51unYv4lddeokkAQ5lyy+SUD2p+qiHGMiWjg HCfxguZzWItSLGQbnhj5rBzPSpjkW9Q0Ql/kI7A4gnYobZxboYKSTiMirNAYs+hsT9xg vgZm43SkUN826+bYjV7LstyN6kHCbYUJGFkzvDsNrFuPRFgdPs50cT45fy69ge4KSAOj Ll7RDE9nlnkupdUY0JXALI1H/QuuD9OQFh3smLzziPL87epVqwDsS4F3mYU8LrULxUge KOi217nlkoGn/Ze6mIJ+t2rf5Q3n4IhhWySpCDmjIbB6PcfVGlnJpqZbD6E90eoKyIFW cTcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=XLExgzrLRIoZ+1AkNjtHtGQ6oai05Dc/yN88SMU2dO4=; b=tRvsAomKMWoulHKggEdM3+w1f5AHGmOYio2e7/qranE5NE+2zCwqasOnr/DLTd0U+R aZiSyzwDXRzKuQUbW+Aiab2lDGW95rgQY0DGkIGZUBM7PZRxryX3eGjIAyYuBZzdxu9e tdJco7RgN80++4CcyvJJ7/QA6lUjKaj8BtM8dVkxio/kDF1g2hhQD3loGHWan6Il1kjM QDQ6RSP/R0tsawcFDtsIxEjWHvPiH4eDYCY90MsxAZ7taeiHTyJwetF0AHAO5sPJeIFg +DPzTCh8BY3Z/tN4vq2l8daRwzSSAJf87joTZTrSC7529xmG0oq6JgsG191hv6Rym1vH dXhg== X-Gm-Message-State: AOAM532IjAgLAYNuA8HqbAaQoPlwgiF35WyvgT1rmhFOFBTXQusNJSjW sSlZSQQgQelZA4G21pVCYhua3eJII65oCQ== X-Google-Smtp-Source: ABdhPJxTUESwvxIH0+jb/rLZXik5oyLqjzQdHqXB1yyZSXhfOoPSLX2IJdWCZ+njhUKzI81eF2qCLQ== X-Received: by 2002:a17:902:bc8a:b029:d4:dc57:6c29 with SMTP id bb10-20020a170902bc8ab02900d4dc576c29mr4765610plb.77.1603301881450; Wed, 21 Oct 2020 10:38:01 -0700 (PDT) Received: from localhost.localdomain ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id h5sm2928829pfh.9.2020.10.21.10.38.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Oct 2020 10:38:00 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v12 07/12] linux-user/elfload: Move PT_INTERP detection to first loop Date: Wed, 21 Oct 2020 10:37:44 -0700 Message-Id: <20201021173749.111103-8-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201021173749.111103-1-richard.henderson@linaro.org> References: <20201021173749.111103-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1043; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1043.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" For BTI, we need to know if the executable is static or dynamic, which means looking for PT_INTERP earlier. Signed-off-by: Richard Henderson --- linux-user/elfload.c | 60 +++++++++++++++++++++++--------------------- 1 file changed, 31 insertions(+), 29 deletions(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 210592aa90..107a628a9e 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -2421,8 +2421,10 @@ static void load_elf_image(const char *image_name, int image_fd, mmap_lock(); - /* Find the maximum size of the image and allocate an appropriate - amount of memory to handle that. */ + /* + * Find the maximum size of the image and allocate an appropriate + * amount of memory to handle that. Locate the interpreter, if any. + */ loaddr = -1, hiaddr = 0; info->alignment = 0; for (i = 0; i < ehdr->e_phnum; ++i) { @@ -2438,6 +2440,33 @@ static void load_elf_image(const char *image_name, int image_fd, } ++info->nsegs; info->alignment |= eppnt->p_align; + } else if (eppnt->p_type == PT_INTERP && pinterp_name) { + g_autofree char *interp_name = NULL; + + if (*pinterp_name) { + errmsg = "Multiple PT_INTERP entries"; + goto exit_errmsg; + } + interp_name = g_malloc(eppnt->p_filesz); + if (!interp_name) { + goto exit_perror; + } + + if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { + memcpy(interp_name, bprm_buf + eppnt->p_offset, + eppnt->p_filesz); + } else { + retval = pread(image_fd, interp_name, eppnt->p_filesz, + eppnt->p_offset); + if (retval != eppnt->p_filesz) { + goto exit_perror; + } + } + if (interp_name[eppnt->p_filesz - 1] != 0) { + errmsg = "Invalid PT_INTERP entry"; + goto exit_errmsg; + } + *pinterp_name = g_steal_pointer(&interp_name); } } @@ -2590,33 +2619,6 @@ static void load_elf_image(const char *image_name, int image_fd, if (vaddr_em > info->brk) { info->brk = vaddr_em; } - } else if (eppnt->p_type == PT_INTERP && pinterp_name) { - g_autofree char *interp_name = NULL; - - if (*pinterp_name) { - errmsg = "Multiple PT_INTERP entries"; - goto exit_errmsg; - } - interp_name = g_malloc(eppnt->p_filesz); - if (!interp_name) { - goto exit_perror; - } - - if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { - memcpy(interp_name, bprm_buf + eppnt->p_offset, - eppnt->p_filesz); - } else { - retval = pread(image_fd, interp_name, eppnt->p_filesz, - eppnt->p_offset); - if (retval != eppnt->p_filesz) { - goto exit_perror; - } - } - if (interp_name[eppnt->p_filesz - 1] != 0) { - errmsg = "Invalid PT_INTERP entry"; - goto exit_errmsg; - } - *pinterp_name = g_steal_pointer(&interp_name); #ifdef TARGET_MIPS } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) { Mips_elf_abiflags_v0 abiflags;