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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 1BB5DC433ED for ; Wed, 19 May 2021 14:34:37 +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 C723361355 for ; Wed, 19 May 2021 14:34:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C723361355 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ilande.co.uk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:53616 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ljNHP-0000kF-Ma for qemu-devel@archiver.kernel.org; Wed, 19 May 2021 10:34:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57432) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljNCe-0000iW-EN for qemu-devel@nongnu.org; Wed, 19 May 2021 10:29:40 -0400 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]:37862 helo=mail.default.ilande.bv.iomart.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljNCY-0008Je-Dl for qemu-devel@nongnu.org; Wed, 19 May 2021 10:29:40 -0400 Received: from host217-39-58-213.range217-39.btcentralplus.com ([217.39.58.213] helo=kentang.home) by mail.default.ilande.bv.iomart.io with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ljNCW-0003Tz-A8; Wed, 19 May 2021 15:29:32 +0100 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, laurent@vivier.eu Date: Wed, 19 May 2021 15:29:16 +0100 Message-Id: <20210519142917.16693-4-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210519142917.16693-1-mark.cave-ayland@ilande.co.uk> References: <20210519142917.16693-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 217.39.58.213 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH 3/4] target/m68k: introduce gen_singlestep_exception() function X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.default.ilande.bv.iomart.io) Received-SPF: pass client-ip=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.default.ilande.bv.iomart.io 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Introduce a new gen_singlestep_exception() function to be called when generating the EXCP_DEBUG exception in single-step mode rather than calling gen_raise_exception(EXCP_DEBUG) directly. This allows for the single-step exception behaviour for all callers to be managed in a single place. Signed-off-by: Mark Cave-Ayland --- target/m68k/translate.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/target/m68k/translate.c b/target/m68k/translate.c index f14ecab5a5..10e8aba42e 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -319,6 +319,15 @@ static void gen_exception(DisasContext *s, uint32_t dest, int nr) s->base.is_jmp = DISAS_NORETURN; } +static void gen_singlestep_exception(DisasContext *s) +{ + /* + * Generate the right kind of exception for singlestep, which is + * EXCP_DEBUG for QEMU's gdb singlestepping. + */ + gen_raise_exception(EXCP_DEBUG); +} + static inline void gen_addr_fault(DisasContext *s) { gen_exception(s, s->base.pc_next, EXCP_ADDRESS); @@ -1520,7 +1529,7 @@ static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest) if (unlikely(is_singlestepping(s))) { update_cc_op(s); tcg_gen_movi_i32(QREG_PC, dest); - gen_raise_exception(EXCP_DEBUG); + gen_singlestep_exception(s); } else if (use_goto_tb(s, dest)) { tcg_gen_goto_tb(n); tcg_gen_movi_i32(QREG_PC, dest); @@ -6260,7 +6269,7 @@ static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) update_cc_op(dc); if (is_singlestepping(dc)) { tcg_gen_movi_i32(QREG_PC, dc->pc); - gen_raise_exception(EXCP_DEBUG); + gen_singlestep_exception(dc); } else { gen_jmp_tb(dc, 0, dc->pc); } @@ -6268,7 +6277,7 @@ static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) case DISAS_JUMP: /* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */ if (is_singlestepping(dc)) { - gen_raise_exception(EXCP_DEBUG); + gen_singlestep_exception(dc); } else { tcg_gen_lookup_and_goto_ptr(); } @@ -6279,7 +6288,7 @@ static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) * other state that may require returning to the main loop. */ if (is_singlestepping(dc)) { - gen_raise_exception(EXCP_DEBUG); + gen_singlestep_exception(dc); } else { tcg_gen_exit_tb(NULL, 0); } -- 2.20.1