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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 7CEDDC2BBCA for ; Tue, 25 Jun 2024 11:38:13 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sM4UI-0003Bm-Ie; Tue, 25 Jun 2024 07:37:26 -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 1sM4UG-0003BF-MH for qemu-devel@nongnu.org; Tue, 25 Jun 2024 07:37:24 -0400 Received: from smtp-out1.suse.de ([2a07:de40:b251:101:10:150:64:1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sM4UE-0007S4-TG for qemu-devel@nongnu.org; Tue, 25 Jun 2024 07:37:24 -0400 Received: from hawking.nue2.suse.org (unknown [IPv6:2a07:de40:a101:3:10:168:4:11]) by smtp-out1.suse.de (Postfix) with ESMTP id 9EF4E2199B for ; Tue, 25 Jun 2024 11:37:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1719315439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type; bh=1nAigMY5SwV6Q9sXjz49IwsvxrjzWIbLL3EK3N/9jHc=; b=qco8RTSSDQnIwwvAtWrfCZdnb10D8lIWi2aZGtY+Y0J3jzXJhItI3TLg3KhFWUpEbqZoqA 9bK8YBZkzKn5i7oQQv/JZG+tNPJSkuAKnONzZ4iR49gJXUG2GwDEh4pv9VeR9/A4I3wQkD QJIBGnqZGYC5PwyVzQH9ULK96+/ujfo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1719315439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type; bh=1nAigMY5SwV6Q9sXjz49IwsvxrjzWIbLL3EK3N/9jHc=; b=nRsDQVjMV0KIx4Wo8n49jRQ8g0p/lwSYczLrHJMxuiIsZKo3I+Op9f9W7J597c37xE1mUn LT7RYxyZvbOj1ABg== Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=qco8RTSS; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=nRsDQVjM DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1719315439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type; bh=1nAigMY5SwV6Q9sXjz49IwsvxrjzWIbLL3EK3N/9jHc=; b=qco8RTSSDQnIwwvAtWrfCZdnb10D8lIWi2aZGtY+Y0J3jzXJhItI3TLg3KhFWUpEbqZoqA 9bK8YBZkzKn5i7oQQv/JZG+tNPJSkuAKnONzZ4iR49gJXUG2GwDEh4pv9VeR9/A4I3wQkD QJIBGnqZGYC5PwyVzQH9ULK96+/ujfo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1719315439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type; bh=1nAigMY5SwV6Q9sXjz49IwsvxrjzWIbLL3EK3N/9jHc=; b=nRsDQVjMV0KIx4Wo8n49jRQ8g0p/lwSYczLrHJMxuiIsZKo3I+Op9f9W7J597c37xE1mUn LT7RYxyZvbOj1ABg== Received: by hawking.nue2.suse.org (Postfix, from userid 17005) id 883244A0565; Tue, 25 Jun 2024 13:37:19 +0200 (CEST) From: Andreas Schwab To: qemu-devel@nongnu.org Subject: linux-user cannot allocate stack memory on riscv64 host due to non-zero guest_base X-Yow: I'm a GENIUS! I want to dispute sentence structure with SUSAN SONTAG!! Date: Tue, 25 Jun 2024 13:37:19 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Spamd-Result: default: False [1.60 / 50.00]; BAYES_HAM(-3.00)[100.00%]; HFILTER_HOSTNAME_UNKNOWN(2.50)[]; ONCE_RECEIVED(1.20)[]; RDNS_NONE(1.00)[]; HFILTER_HELO_IP_A(1.00)[hawking.nue2.suse.org]; NEURAL_HAM_LONG(-1.00)[-1.000]; HFILTER_HELO_NORES_A_OR_MX(0.30)[hawking.nue2.suse.org]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.19)[-0.941]; RCVD_NO_TLS_LAST(0.10)[]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DIRECT_TO_MX(0.00)[Gnus/5.13 (Gnus v5.13)]; RCPT_COUNT_ONE(0.00)[1]; ARC_NA(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; DKIM_TRACE(0.00)[suse.de:+]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_COUNT_ONE(0.00)[1]; MID_RHS_MATCH_FROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,suse.de:dkim] X-Spamd-Bar: + X-Rspamd-Queue-Id: 9EF4E2199B X-Rspamd-Action: no action X-Rspamd-Server: rspamd1.dmz-prg2.suse.org Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:1; envelope-from=schwab@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When running qemu-riscv64 on a riscv64 host executing a ET_EXEC riscv64 binary it cannot allocate memory for the stack: $ qemu-riscv64 -d page ./hello.riscv64 host mmap_min_addr=0x10000 Locating guest address space @ 0x3ee000 page layout changed following mmap start end size prot 0000000000010000-0000000000013000 0000000000003000 --- page layout changed following mmap start end size prot 0000000000010000-0000000000011000 0000000000001000 r-x 0000000000011000-0000000000013000 0000000000002000 --- page layout changed following mmap start end size prot 0000000000010000-0000000000011000 0000000000001000 r-x 0000000000011000-0000000000013000 0000000000002000 rw- mmap stack: Cannot allocate memory The issue is that guest_base is non-zero, which turns the target_mmap call with zero base in setup_arg_pages into a host mmap call with non-zero base. On other hosts like x86_64 or aarch64, guest_base remains zero and the issue does not occur. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."