From nobody Wed Feb 11 03:44:03 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1633336032967725.0977346829435; Mon, 4 Oct 2021 01:27:12 -0700 (PDT) Received: from localhost ([::1]:33100 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mXJJX-0001RT-VR for importer@patchew.org; Mon, 04 Oct 2021 04:27:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44298) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXIeZ-0004Pw-CT for qemu-devel@nongnu.org; Mon, 04 Oct 2021 03:44:52 -0400 Received: from mout.kundenserver.de ([212.227.126.131]:46171) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXIeT-0004yM-Bg for qemu-devel@nongnu.org; Mon, 04 Oct 2021 03:44:49 -0400 Received: from quad ([82.142.3.114]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1M3loZ-1mX1ni0Fql-000rRB; Mon, 04 Oct 2021 09:44:37 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PULL 22/26] linux-user/sh4: Implement setup_sigtramp Date: Mon, 4 Oct 2021 09:44:17 +0200 Message-Id: <20211004074421.3141222-23-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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:UY5j0COrFLEmlfQfVnJ3koYLiU9Vl3VFrGwXK8OfbZYdruni67y FSBAz7JRYyf+ndjBPINEi9Pq9F79OKb1F8yrieF3vGY8XLfcKdPvhsM7rWiwzhvYCpEZpaM ZlsWgJMsWaMFVLuDjTi/jp+g3++YHo5GxkQnDbuzn5mOGNkiW+ruCV9A3HrIznGP1xfdX8l OC0rh0P9PQvxRYBoMHL6Q== X-UI-Out-Filterresults: notjunk:1;V03:K0:lBjxHDcKciI=:WiWlakfPIck/APP8uhbNij RQGRCRV9LotOilvhEKGtvWWl9qjLZqzHr8hw4BT1PSlO9/n06DoHY+l5VaKmqMmT9iLMGOyGj OlDCyiPjPw7l6IgJBixu2sYxNuYQd9UVGHru2SkVO/2oDsJrDYXkVwCYJVokgagZY5bQPN2XY rrEbXteVciswOrG8gFhPFE6S6REiPjOwQ4mUAXuCG8w7w0ri9pw+DZbVGU+1S5j8G4S9k9Qn+ HClpRGXZATU2YFY4kiAgYBwFlt7wbO8Nu9riSJjQV3DBQc3ZZLS3m7NwfUwnjRbcDzdjODtSm J0DGNX3neq0vR24PiODuvYJ/yfXNycnldKS5TgPmxeTtQ/pDdEas7wbRSY26p8aRn4XCE3Ehx mQmYVFA0PbZMUEHHiwY6ZxTBPEIQ31bzEw8D+IVWaA/6dalXfrTQNlSoTRKu54U04xgu++2uF rxEK2rXXg4iFUJULVMy/6T6SH6EpzKry/pbpgczfki9eqbZR2oeDTbrWbVwVTuZ567uYiJksP jmLF/oHBYoLmpBouwzY/hzMswqiHA9ygiooWDZ56JGny2/jYgkEKelqZ/IkX72mUA/C0jfjGU 9cigO3/2OBn+qA+RaYpd8Of4W8EXr94A8V3Ssu7thCaibPHllzvpg+LCWhYBJ9IUPazQVgJIa AZj/3Cy0k3JxsoM6MzcXFRSUO8crrNojjjBl/kWSlsV0j0OPMiV48Z0EJjOxQ1weGvnJxTqu5 8sfUc09KxWVl2OzP9VkMuNKGbHie/ZCh8LoaZA== Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=212.227.126.131; 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, 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=20Mathieu-Daud=C3=A9?= , Yoshinori Sato , Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1633336033508100001 From: Richard Henderson Create and record the two signal trampolines. Use them when the guest does not use SA_RESTORER. Cc: Yoshinori Sato Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Richard Henderson Message-Id: <20210929130553.121567-23-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier --- linux-user/sh4/signal.c | 40 +++++++++++++++++++--------------- linux-user/sh4/target_signal.h | 2 ++ 2 files changed, 24 insertions(+), 18 deletions(-) diff --git a/linux-user/sh4/signal.c b/linux-user/sh4/signal.c index d70d744befc2..faa869fb1958 100644 --- a/linux-user/sh4/signal.c +++ b/linux-user/sh4/signal.c @@ -52,7 +52,6 @@ struct target_sigframe { struct target_sigcontext sc; target_ulong extramask[TARGET_NSIG_WORDS-1]; - uint16_t retcode[3]; }; =20 =20 @@ -68,7 +67,6 @@ struct target_rt_sigframe { struct target_siginfo info; struct target_ucontext uc; - uint16_t retcode[3]; }; =20 =20 @@ -190,15 +188,9 @@ void setup_frame(int sig, struct target_sigaction *ka, /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa_flags & TARGET_SA_RESTORER) { - regs->pr =3D (unsigned long) ka->sa_restorer; + regs->pr =3D ka->sa_restorer; } else { - /* Generate return code (system call to sigreturn) */ - abi_ulong retcode_addr =3D frame_addr + - offsetof(struct target_sigframe, retcode); - __put_user(MOVW(2), &frame->retcode[0]); - __put_user(TRAP_NOARG, &frame->retcode[1]); - __put_user((TARGET_NR_sigreturn), &frame->retcode[2]); - regs->pr =3D (unsigned long) retcode_addr; + regs->pr =3D default_sigreturn; } =20 /* Set up registers for signal handler */ @@ -248,15 +240,9 @@ void setup_rt_frame(int sig, struct target_sigaction *= ka, /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa_flags & TARGET_SA_RESTORER) { - regs->pr =3D (unsigned long) ka->sa_restorer; + regs->pr =3D ka->sa_restorer; } else { - /* Generate return code (system call to sigreturn) */ - abi_ulong retcode_addr =3D frame_addr + - offsetof(struct target_rt_sigframe, retco= de); - __put_user(MOVW(2), &frame->retcode[0]); - __put_user(TRAP_NOARG, &frame->retcode[1]); - __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]); - regs->pr =3D (unsigned long) retcode_addr; + regs->pr =3D default_rt_sigreturn; } =20 /* Set up registers for signal handler */ @@ -334,3 +320,21 @@ badframe: force_sig(TARGET_SIGSEGV); return -TARGET_QEMU_ESIGRETURN; } + +void setup_sigtramp(abi_ulong sigtramp_page) +{ + uint16_t *tramp =3D lock_user(VERIFY_WRITE, sigtramp_page, 2 * 6, 0); + assert(tramp !=3D NULL); + + default_sigreturn =3D sigtramp_page; + __put_user(MOVW(2), &tramp[0]); + __put_user(TRAP_NOARG, &tramp[1]); + __put_user(TARGET_NR_sigreturn, &tramp[2]); + + default_rt_sigreturn =3D sigtramp_page + 6; + __put_user(MOVW(2), &tramp[3]); + __put_user(TRAP_NOARG, &tramp[4]); + __put_user(TARGET_NR_rt_sigreturn, &tramp[5]); + + unlock_user(tramp, sigtramp_page, 2 * 6); +} diff --git a/linux-user/sh4/target_signal.h b/linux-user/sh4/target_signal.h index d7309b7136d7..04069cba6641 100644 --- a/linux-user/sh4/target_signal.h +++ b/linux-user/sh4/target_signal.h @@ -22,4 +22,6 @@ typedef struct target_sigaltstack { #include "../generic/signal.h" =20 #define TARGET_ARCH_HAS_SETUP_FRAME +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 + #endif /* SH4_TARGET_SIGNAL_H */ --=20 2.31.1