From nobody Wed Feb 11 02:14:20 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 1633335195751326.5714373805748; Mon, 4 Oct 2021 01:13:15 -0700 (PDT) Received: from localhost ([::1]:33404 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mXJ62-0007P5-Nk for importer@patchew.org; Mon, 04 Oct 2021 04:13:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44234) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXIeR-0004K7-TH; Mon, 04 Oct 2021 03:44:43 -0400 Received: from mout.kundenserver.de ([212.227.126.133]:36429) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXIeO-0004uM-MJ; Mon, 04 Oct 2021 03:44:43 -0400 Received: from quad ([82.142.3.114]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MysmQ-1mjrew1vjG-00w0V6; Mon, 04 Oct 2021 09:44:36 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PULL 21/26] linux-user/s390x: Implement setup_sigtramp Date: Mon, 4 Oct 2021 09:44:16 +0200 Message-Id: <20211004074421.3141222-22-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:c30x3yUmnq8Umz5Jiv9UEsmawYcGms+lxlyFGWhYKfqkKjvF5i/ b/0UJNaHtB2njBXLFQIt0RmodO/UaOLE9MHwetgL7sAq+T61qPXQ0qDrKoQHQzvQY9+WYmO zyMnO+g4IKofj/x2wzj7lNn6/bYHdC+VRhUaL8LO5iu/I6Q8khcHSsd2YGRIsGS8GRptME3 w3miAhemiy06MZoq2bV8A== X-UI-Out-Filterresults: notjunk:1;V03:K0:NIgMMTv4LDg=:l6bhVuCLN/AH4Dv9D4GxmF Z2BreH4FdN5pCnTLTmK5H+AHCP7eFOB04IkLLPC16Vt8wZB94Cwq69GRwOWEf/WX7PmRzZL9o nbs7DXizH4EkDkzd/CQv+tkx9xTLlDhoN3eGeqKSjiqX5+drf44yENUeBUErFftnHS1fp6j/v 4K1oD88DnPojqzz95/vALdfj6znpkfwUzgkHQjMT5h80ZuViWxEXCLFPuDZLYXGaXCzTzD67l 8kIb8G6TIh/3cFDQpU3sH4LmRZo9+nD4apNECu1AiaDknSKe9mMZbUaV4+5VA8B/3q3rsj7V5 yAz+9LWiElUW5C3V+0zR+w7tN0HjEQ1ZqVvZjszuznFHDcIWBbsZwlWxVetpF80kgB0jDnkQl nIcgYtN6p7U2RYot50Ra5tDzHSmzOH+j1isEvycz8uAPr9d4Oma8GDU4uMvxUuNizTzZXLkxX RGWJYJPjwhwSlcX5lbQ/fepUS5gpZntnCdzo9deM7qx7jWxtNYeFeETZ4ESS4+hUv5Xm/6KZ4 f+ihI/9NYC3KmLqLjPf/WTLTeHbirHE6HgGngulzb9pBxk5ThQOCDQC+AMsqnd3wNSLxjoWEe EciuYlyYz+p7iKZKB3N02G1D1YmsX8eBA/LQRO5dyAKwB2jOvJMnAKDwAeI7rFdNa0wKPBfEt U1dIAfX1GpQCO3kEC+8UQAqPYzB/uFKeg7o/iokfzqT/0phKcZamGWhPw/wDiQEUFcP8jgpYs j4uyGQfsnUA/hG+du2LYCPCZK4QCf/cMHbzN2w== 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=212.227.126.133; 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_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-s390x@nongnu.org, Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1633335196750100001 From: Richard Henderson Create and record the two signal trampolines. Use them when the guest does not use SA_RESTORER. Cc: qemu-s390x@nongnu.org Tested-by: Alex Benn=C3=A9e Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Richard Henderson Message-Id: <20210929130553.121567-22-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier --- linux-user/s390x/signal.c | 24 ++++++++++++++++-------- linux-user/s390x/target_signal.h | 2 ++ 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/linux-user/s390x/signal.c b/linux-user/s390x/signal.c index 80f34086d7b5..676b94814769 100644 --- a/linux-user/s390x/signal.c +++ b/linux-user/s390x/signal.c @@ -68,7 +68,6 @@ typedef struct { target_sigregs sregs; int signo; target_sigregs_ext sregs_ext; - uint16_t retcode; } sigframe; =20 #define TARGET_UC_VXRS 2 @@ -85,7 +84,6 @@ struct target_ucontext { =20 typedef struct { uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; - uint16_t retcode; struct target_siginfo info; struct target_ucontext uc; } rt_sigframe; @@ -209,9 +207,7 @@ void setup_frame(int sig, struct target_sigaction *ka, if (ka->sa_flags & TARGET_SA_RESTORER) { restorer =3D ka->sa_restorer; } else { - restorer =3D frame_addr + offsetof(sigframe, retcode); - __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, - &frame->retcode); + restorer =3D default_sigreturn; } =20 /* Set up registers for signal handler */ @@ -262,9 +258,7 @@ void setup_rt_frame(int sig, struct target_sigaction *k= a, if (ka->sa_flags & TARGET_SA_RESTORER) { restorer =3D ka->sa_restorer; } else { - restorer =3D frame_addr + offsetof(typeof(*frame), retcode); - __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, - &frame->retcode); + restorer =3D default_rt_sigreturn; } =20 /* Create siginfo on the signal stack. */ @@ -405,3 +399,17 @@ long do_rt_sigreturn(CPUS390XState *env) unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; } + +void setup_sigtramp(abi_ulong sigtramp_page) +{ + uint16_t *tramp =3D lock_user(VERIFY_WRITE, sigtramp_page, 2 + 2, 0); + assert(tramp !=3D NULL); + + default_sigreturn =3D sigtramp_page; + __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, &tramp[0]); + + default_rt_sigreturn =3D sigtramp_page + 2; + __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, &tramp[1]); + + unlock_user(tramp, sigtramp_page, 2 + 2); +} diff --git a/linux-user/s390x/target_signal.h b/linux-user/s390x/target_sig= nal.h index bbfc464d4417..64f5f422010f 100644 --- a/linux-user/s390x/target_signal.h +++ b/linux-user/s390x/target_signal.h @@ -19,4 +19,6 @@ typedef struct target_sigaltstack { #include "../generic/signal.h" =20 #define TARGET_ARCH_HAS_SETUP_FRAME +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 + #endif /* S390X_TARGET_SIGNAL_H */ --=20 2.31.1