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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 5D867C433E0 for ; Sat, 16 Jan 2021 14:39:35 +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 998E0227BF for ; Sat, 16 Jan 2021 14:39:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 998E0227BF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=eik.bme.hu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47738 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l0mjk-00085v-7D for qemu-devel@archiver.kernel.org; Sat, 16 Jan 2021 09:39:32 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:38038) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l0mjD-0007gH-4C; Sat, 16 Jan 2021 09:38:59 -0500 Received: from zero.eik.bme.hu ([2001:738:2001:2001::2001]:36683) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l0mjA-0005o5-BJ; Sat, 16 Jan 2021 09:38:58 -0500 Received: from zero.eik.bme.hu (blah.eik.bme.hu [152.66.115.182]) by localhost (Postfix) with SMTP id 6A39D7462DB; Sat, 16 Jan 2021 15:38:49 +0100 (CET) Received: by zero.eik.bme.hu (Postfix, from userid 432) id 4007E7462D3; Sat, 16 Jan 2021 15:38:49 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zero.eik.bme.hu (Postfix) with ESMTP id 3ED7E7462BD; Sat, 16 Jan 2021 15:38:49 +0100 (CET) Date: Sat, 16 Jan 2021 15:38:49 +0100 (CET) From: BALATON Zoltan To: qemu-devel@nongnu.org Subject: Recent TCG commit breaks PPC Message-ID: MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset=US-ASCII Received-SPF: pass client-ip=2001:738:2001:2001::2001; envelope-from=balaton@eik.bme.hu; helo=zero.eik.bme.hu X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: Richard Henderson , qemu-ppc@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hello, Commit 8fe35e0444be (tcg/optimize: Use tcg_constant_internal with constant folding) seems to break PPC emulation for me: Thread 3 "qemu-system-ppc" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff51e7700 (LWP 22636)] 0x0000555555afd4ee in ts_are_copies (ts2=0x7fff8c008f90, ts1=0x7fff8c001510) at ../tcg/optimize.c:68 68 return ts_info(ts)->next_copy != ts; (gdb) bt #0 0x0000555555afd4ee in ts_are_copies (ts2=0x7fff8c008f90, ts1=0x7fff8c001510) at tcg/optimize.c:68 #1 0x0000555555afd4ee in tcg_opt_gen_mov (s=s@entry=0x7fff8c000b60, op=op@entry=0x7fff8c6b2348, dst=140735542203664, src=140735542235024) at tcg/optimize.c:191 #2 0x0000555555afe05a in tcg_opt_gen_movi (s=s@entry=0x7fff8c000b60, temps_used=temps_used@entry=0x7ffff51e63c0, op=op@entry=0x7fff8c6b2348, dst=, val=) at include/tcg/tcg.h:731 #3 0x0000555555aff79f in tcg_optimize (s=s@entry=0x7fff8c000b60) at tcg/optimize.c:1189 #4 0x0000555555b13c39 in tcg_gen_code (s=0x7fff8c000b60, tb=tb@entry=0x7fffb3181380 ) at tcg/tcg.c:4490 #5 0x0000555555b1b485 in tb_gen_code (cpu=cpu@entry=0x55555651c870, pc=pc@entry=4287582720, cs_base=cs_base@entry=0, flags=flags@entry=24576, cflags=-16777216, cflags@entry=0) at accel/tcg/translate-all.c:1952 #6 0x0000555555b7c303 in tb_find (cf_mask=0, tb_exit=0, last_tb=0x0, cpu=0x0) at accel/tcg/cpu-exec.c:454 #7 0x0000555555b7c303 in cpu_exec (cpu=cpu@entry=0x55555651c870) at accel/tcg/cpu-exec.c:810 #8 0x0000555555ab5ea2 in tcg_cpus_exec (cpu=cpu@entry=0x55555651c870) at accel/tcg/tcg-cpus.c:57 #9 0x0000555555ab7a03 in rr_cpu_thread_fn (arg=arg@entry=0x55555651c870) at accel/tcg/tcg-cpus-rr.c:217 #10 0x0000555555cc355a in qemu_thread_start (args=) at util/qemu-thread-posix.c:521 #11 0x00007ffff6cc004c in start_thread () at /lib64/libpthread.so.0 #12 0x00007ffff6bf13af in clone () at /lib64/libc.so.6 This can be reproduced for example with booting AROS as described here: http://zero.eik.bme.hu/~balaton/qemu/amiga/#aros The segfault happens during boot. Regards, BALATON Zoltan