From patchwork Wed Oct 21 17:37:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 1385689 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=hTfU1Yq5; 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 4CGdWR2pTJz9sRR for ; Thu, 22 Oct 2020 04:57:55 +1100 (AEDT) Received: from localhost ([::1]:57960 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kVIMz-0002in-Bf for incoming@patchwork.ozlabs.org; Wed, 21 Oct 2020 13:57:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51888) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVI3x-0006fO-9b for qemu-devel@nongnu.org; Wed, 21 Oct 2020 13:38:13 -0400 Received: from mail-pl1-x644.google.com ([2607:f8b0:4864:20::644]:34891) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kVI3u-0006T5-5C for qemu-devel@nongnu.org; Wed, 21 Oct 2020 13:38:12 -0400 Received: by mail-pl1-x644.google.com with SMTP id 1so1583148ple.2 for ; Wed, 21 Oct 2020 10:38:05 -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=i9e477C0zg/4lfiSUJ/DUA8jokwPxP/mv4JJb8OtKrE=; b=hTfU1Yq5A14rUMvyRNdxWZNn5fDVheCb/WYZeB/u5humMA4BjkoEg2kBSvgzsjEPut gWry1Tk0U7AWQtqrNFphogmL4BzUqrkLeUOqF1h+/8NrPfxsaBOWsbTMyGNjuzfTzGiw 0hTKb6+JHFhg0Bd+Tg6az9QNdqxpAe1VLfbF2Bh7/X+cdXyr+6ItqMAiU0URS3E8zje3 k96aE8D0MU4t9rIjI3mP4P+XE/krI5GxqxKQwP+Hfph1yLL/ATcxdriI0jKJCP0vQHfu ijKIzSuY7U/25BrKcpqAW2sz9zu7676XGGfOhUjH5Pxf79DkET30EUhEgkNiIWN0rwfh q7tQ== 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=i9e477C0zg/4lfiSUJ/DUA8jokwPxP/mv4JJb8OtKrE=; b=dIrENPTeVRcK0MwaD10KzWKZG1D17TJUZ3GOtn/TNCPCcr9VC0ykmOK7QW3FL52U1M dYHYPIEYLbletTEyuSw5EIYYZZgKTzfaicqN73cv4AMr5ucq4Y6Xfnq7BFrJ+9Foq7GJ YTwSGmJYxgliRdtCxo3zH3wJrGFGXh7DDZYJsV8lJbo8lga8/9Z9h1t2m8TgP/LzT8/N yk0j/yOFzN+SGqWw4wNyeaqldOfxRGdOZExZL1JsIKXYZlR8qcSKfp1EJlTHiudg/7B+ qYYp3/K3dRaMhWcf8jsJDb8ThnV4mFQK78hxUsN1vg30I2tyKBnJyBOV1E319D9Qc4aE mI5g== X-Gm-Message-State: AOAM533omyUlmztM289qBZ0iXnbgVX3kKOPAeSHmRtSnIz0km1RFW2Ae fK7oAQSMowBodnxmUQf+Tsq3Am9Ba8XGGQ== X-Google-Smtp-Source: ABdhPJzvI5PtwUlcSlkNe+Wivj4+f2aHNxepKoXFvghkFrTMH5B2fgYKqgE4/87j2SMQ4LN03TB/EQ== X-Received: by 2002:a17:902:9f96:b029:d4:c459:a181 with SMTP id g22-20020a1709029f96b02900d4c459a181mr4759859plq.28.1603301882721; Wed, 21 Oct 2020 10:38:02 -0700 (PDT) Received: from localhost.localdomain ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id h5sm2928829pfh.9.2020.10.21.10.38.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Oct 2020 10:38:01 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v12 08/12] linux-user/elfload: Use Error for load_elf_image Date: Wed, 21 Oct 2020 10:37:45 -0700 Message-Id: <20201021173749.111103-9-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::644; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x644.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" This is a bit clearer than open-coding some of this with a bare c string. Signed-off-by: Richard Henderson --- linux-user/elfload.c | 37 ++++++++++++++++++++----------------- 1 file changed, 20 insertions(+), 17 deletions(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 107a628a9e..56fbda93d0 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -12,6 +12,7 @@ #include "qemu/guest-random.h" #include "qemu/units.h" #include "qemu/selfmap.h" +#include "qapi/error.h" #ifdef _ARCH_PPC64 #undef ARCH_DLINFO @@ -2392,15 +2393,16 @@ static void load_elf_image(const char *image_name, int image_fd, struct elf_phdr *phdr; abi_ulong load_addr, load_bias, loaddr, hiaddr, error; int i, retval; - const char *errmsg; + Error *err = NULL; /* First of all, some simple consistency checks */ - errmsg = "Invalid ELF image for this architecture"; if (!elf_check_ident(ehdr)) { + error_setg(&err, "Invalid ELF image for this architecture"); goto exit_errmsg; } bswap_ehdr(ehdr); if (!elf_check_ehdr(ehdr)) { + error_setg(&err, "Invalid ELF image for this architecture"); goto exit_errmsg; } @@ -2444,13 +2446,11 @@ static void load_elf_image(const char *image_name, int image_fd, g_autofree char *interp_name = NULL; if (*pinterp_name) { - errmsg = "Multiple PT_INTERP entries"; + error_setg(&err, "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, @@ -2459,11 +2459,11 @@ static void load_elf_image(const char *image_name, int image_fd, retval = pread(image_fd, interp_name, eppnt->p_filesz, eppnt->p_offset); if (retval != eppnt->p_filesz) { - goto exit_perror; + goto exit_read; } } if (interp_name[eppnt->p_filesz - 1] != 0) { - errmsg = "Invalid PT_INTERP entry"; + error_setg(&err, "Invalid PT_INTERP entry"); goto exit_errmsg; } *pinterp_name = g_steal_pointer(&interp_name); @@ -2520,7 +2520,7 @@ static void load_elf_image(const char *image_name, int image_fd, (ehdr->e_type == ET_EXEC ? MAP_FIXED : 0), -1, 0); if (load_addr == -1) { - goto exit_perror; + goto exit_mmap; } load_bias = load_addr - loaddr; @@ -2587,7 +2587,7 @@ static void load_elf_image(const char *image_name, int image_fd, image_fd, eppnt->p_offset - vaddr_po); if (error == -1) { - goto exit_perror; + goto exit_mmap; } } @@ -2623,7 +2623,7 @@ static void load_elf_image(const char *image_name, int image_fd, } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) { Mips_elf_abiflags_v0 abiflags; if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) { - errmsg = "Invalid PT_MIPS_ABIFLAGS entry"; + error_setg(&err, "Invalid PT_MIPS_ABIFLAGS entry"); goto exit_errmsg; } if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { @@ -2633,7 +2633,7 @@ static void load_elf_image(const char *image_name, int image_fd, retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0), eppnt->p_offset); if (retval != sizeof(Mips_elf_abiflags_v0)) { - goto exit_perror; + goto exit_read; } } bswap_mips_abiflags(&abiflags); @@ -2658,13 +2658,16 @@ static void load_elf_image(const char *image_name, int image_fd, exit_read: if (retval >= 0) { - errmsg = "Incomplete read of file header"; - goto exit_errmsg; + error_setg(&err, "Incomplete read of file header"); + } else { + error_setg_errno(&err, errno, "Error reading file header"); } - exit_perror: - errmsg = strerror(errno); + goto exit_errmsg; + exit_mmap: + error_setg_errno(&err, errno, "Error mapping file"); + goto exit_errmsg; exit_errmsg: - fprintf(stderr, "%s: %s\n", image_name, errmsg); + error_reportf_err(err, "%s: ", image_name); exit(-1); }