From patchwork Mon Oct 4 07:44:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 1535979 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=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4HND5m2fBFz9t25 for ; Mon, 4 Oct 2021 19:14:36 +1100 (AEDT) Received: from localhost ([::1]:37986 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mXJ7K-00020W-57 for incoming@patchwork.ozlabs.org; Mon, 04 Oct 2021 04:14:34 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44294) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXIeZ-0004Pt-BE for qemu-devel@nongnu.org; Mon, 04 Oct 2021 03:44:52 -0400 Received: from mout.kundenserver.de ([212.227.126.187]:34427) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXIeK-0004p4-Jc for qemu-devel@nongnu.org; Mon, 04 Oct 2021 03:44:49 -0400 Received: from quad ([82.142.3.114]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.167]) with ESMTPSA (Nemesis) id 1Mi4un-1n2Dc71PXt-00e893; Mon, 04 Oct 2021 09:44:30 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PULL 12/26] linux-user/m68k: Implement setup_sigtramp Date: Mon, 4 Oct 2021 09:44:07 +0200 Message-Id: <20211004074421.3141222-13-laurent@vivier.eu> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211004074421.3141222-1-laurent@vivier.eu> References: <20211004074421.3141222-1-laurent@vivier.eu> MIME-Version: 1.0 X-Provags-ID: V03:K1:1DgHCBPdYMlNL/Lp4AhHSyXZbDc7LU/FnUP6wCSRdv05/tMNsTB 2bLZBoAY86xD344ehaov7bOYrdzkD+JroQn9aPdzXx7vJU+KfIYuLfVrujBu1bTF/Srv8p5 Ijpw0CaNtFsn5ADEUp32rSE92WNLv37oi1xi8TkgjdaQHTB5GoY6r4MpEaWJKygNbg7x77k g4brSshE2CMWrAAwzt3yw== X-UI-Out-Filterresults: notjunk:1;V03:K0:DlnajSSkPlI=:UDu4WeGaNL1/Nxp26rFBx1 1RFzH35h18kqAhIoWeZIbMzonW7fFjNdlOhSCKMwSi0DPmMfb5dCb855lwxzXQwPXnQg7sQWY aprPUPSLvIOIUKFjXjH4Fz9zz1W2zBqJfIUHkPqtDsYS0F3bYrGV+rdsWDGqeEdKfojC9a6S2 AXkG613+fQavwFd/z+hx06hYesy77fjeZi1Xs6Tg6we2KrIBsqUKYg73yVSBvhyPPaTY/wTbB yDofgwD6KRSJXHVyRVXLf2jbVUHEyiJP2JsHR+eTgzNdTNJUEneih5X6lshlgzQXUlX33FBF/ IQygHvb882I9CHoNV0w6QsuBX7zZtomjuy3GZnFKvLa8BkjyYQV8zsKstGMMtS4Qbf/+LgWW8 EGuvBGVZS/oBB1uXiyr4v94dM+kL/0ZHSH17NoPGDFCxxMX+liMzo1O7Uwzfo9TAM75Vmtzvb 8KZpCfqtBy2dMNQQn+u4Dl8oH8NVHAwGNhhWnzMCyBiBkP8ng3cC9xQPX4OZfGXiJGe2OyOji g7G6paqNg21coVY8Oq1zMReAD/+yzowTBPP35CfrfHg2eQmmz8ZhiVdzZEgoE3UlFMQv2humU j9LcPor9Dr4WuT3QmAlB3oUB5DdIcmw8UKVuc0oAc9+Sh2AXsMfZfVu3wbXT38ah8292mhnxP ymph7U4b3KJhaDOjlPgVTGS6U3+TBgbcmepYgMnC3jtSsswt0LApY8AnqkW0NAYFWQDpmY9OF dPO7WeQZaI5W1rh8mI2mhodz2jQU1T6k0IrRvg== Received-SPF: none client-ip=212.227.126.187; envelope-from=laurent@vivier.eu; helo=mout.kundenserver.de 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_NONE=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 , =?utf-8?q?Philippe_Mat?= =?utf-8?q?hieu-Daud=C3=A9?= , Laurent Vivier Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Richard Henderson Create and record the two signal trampolines. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson Message-Id: <20210929130553.121567-13-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier --- linux-user/m68k/signal.c | 47 +++++++++++++++------------------ linux-user/m68k/target_signal.h | 2 ++ 2 files changed, 24 insertions(+), 25 deletions(-) diff --git a/linux-user/m68k/signal.c b/linux-user/m68k/signal.c index 4f8eb6f727e4..ec33482e1403 100644 --- a/linux-user/m68k/signal.c +++ b/linux-user/m68k/signal.c @@ -39,7 +39,6 @@ struct target_sigframe int sig; int code; abi_ulong psc; - char retcode[8]; abi_ulong extramask[TARGET_NSIG_WORDS-1]; struct target_sigcontext sc; }; @@ -76,7 +75,6 @@ struct target_rt_sigframe int sig; abi_ulong pinfo; abi_ulong puc; - char retcode[8]; struct target_siginfo info; struct target_ucontext uc; }; @@ -130,7 +128,6 @@ void setup_frame(int sig, struct target_sigaction *ka, { struct target_sigframe *frame; abi_ulong frame_addr; - abi_ulong retcode_addr; abi_ulong sc_addr; int i; @@ -152,16 +149,7 @@ void setup_frame(int sig, struct target_sigaction *ka, } /* Set up to return from userspace. */ - - retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); - __put_user(retcode_addr, &frame->pretcode); - - /* moveq #,d0; trap #0 */ - - __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), - (uint32_t *)(frame->retcode)); - - /* Set up to return from userspace */ + __put_user(default_sigreturn, &frame->pretcode); env->aregs[7] = frame_addr; env->pc = ka->_sa_handler; @@ -288,7 +276,6 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, { struct target_rt_sigframe *frame; abi_ulong frame_addr; - abi_ulong retcode_addr; abi_ulong info_addr; abi_ulong uc_addr; int err = 0; @@ -325,17 +312,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, } /* Set up to return from userspace. */ - - retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); - __put_user(retcode_addr, &frame->pretcode); - - /* moveq #,d0; notb d0; trap #0 */ - - __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), - (uint32_t *)(frame->retcode + 0)); - __put_user(0x4e40, (uint16_t *)(frame->retcode + 4)); - - /* Set up to return from userspace */ + __put_user(default_rt_sigreturn, &frame->pretcode); env->aregs[7] = frame_addr; env->pc = ka->_sa_handler; @@ -411,3 +388,23 @@ badframe: force_sig(TARGET_SIGSEGV); return -TARGET_QEMU_ESIGRETURN; } + +void setup_sigtramp(abi_ulong sigtramp_page) +{ + void *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 4 + 6, 0); + assert(tramp != NULL); + + default_sigreturn = sigtramp_page; + + /* moveq #,d0; trap #0 */ + __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), (uint32_t *)tramp); + + default_rt_sigreturn = sigtramp_page + 4; + + /* moveq #,d0; notb d0; trap #0 */ + __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), + (uint32_t *)(tramp + 4)); + __put_user(0x4e40, (uint16_t *)(tramp + 8)); + + unlock_user(tramp, sigtramp_page, 4 + 6); +} diff --git a/linux-user/m68k/target_signal.h b/linux-user/m68k/target_signal.h index d096544ef842..94157bf1f48d 100644 --- a/linux-user/m68k/target_signal.h +++ b/linux-user/m68k/target_signal.h @@ -22,4 +22,6 @@ typedef struct target_sigaltstack { #include "../generic/signal.h" #define TARGET_ARCH_HAS_SETUP_FRAME +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 + #endif /* M68K_TARGET_SIGNAL_H */