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[209.51.188.17]) by mx.google.com with ESMTPS id e11si14110467jap.111.2021.04.25.19.54.14 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sun, 25 Apr 2021 19:54:14 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=tFd7oVBa; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1]:51746 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1larO1-0007td-I6 for patch@linaro.org; Sun, 25 Apr 2021 22:54:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59978) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1larNW-0007s7-NE for qemu-devel@nongnu.org; Sun, 25 Apr 2021 22:53:43 -0400 Received: from mail-pl1-x630.google.com ([2607:f8b0:4864:20::630]:45646) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1larNT-0007W1-US for qemu-devel@nongnu.org; Sun, 25 Apr 2021 22:53:42 -0400 Received: by mail-pl1-x630.google.com with SMTP id p17so2240910plf.12 for ; Sun, 25 Apr 2021 19:53:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=I/QSpFJojVKD9zlGg6U9x9sUX8bwKBgn7ApEGuKeRY8=; b=tFd7oVBaRe6IByjuWo1B9UeCSTIfehrsdDBnJV/HUtdvSIgvLas16y+VBx4ddIJnhF CnK3c7joSTJ4NSVBzLskVk0ahUTcLTjac5NXEVg9i3+leFGlLFbLTsiVxMgUlUp2Zu/r dNjo6y0bUEnnqEOalKiMWFjl4FWETgkP+xSPnWXr6cwiFzd2t/wIcu9wzVeN9zsIdQWj tqmbmYnbwbDCKabr5sK43xdfzLW9b/zDlY2JQETKBGkrOAXLgtoBnPPJ48U3ML8NUD+R YkUl/NTNuVKAJ4yPyTsEW0VaxvdeDKIFsU5nZuyTCNirHnOk8Soxb7/LOTUPvCibSOC6 WR/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=I/QSpFJojVKD9zlGg6U9x9sUX8bwKBgn7ApEGuKeRY8=; b=h6ejMmY1GuWRM/QB0Rz2P1G6f2JfFaDArYAvN63deXlXdyJsX3FD1fZWTPh6K6cq63 oD7VOEcxM187sS7e/sq6gJT/uCYtzeIx/gxvO6J/5dqpkh33zaun7vwdjbZtUc3cY2Jt SXRoz4+XPPWKL8yjtK6tUhJrzbCHVRD7grLEJ+3KZGCdC48a+6pUzoXUrgevltgtAkUP dXdzNvRd4hdKAzmRytvFczd4KVYGDqaNCirTU6b2e4KvgxUhdTCDOhAHjoyFBDltJjPn J8PnJjY30LL4MbSsWcsNyP9ZPab9QNgYPkqZRbbGPqQzYIH9NL9WYmvrcYU/obNlPAWp xsIg== X-Gm-Message-State: AOAM531log+dw36qigi97aqY+nd8sIUJKaYqa9YtbfsCTQOiavN+vnDa WY3m5qNAEjnhEQd0z7EOc1v25ObygNwefg== X-Received: by 2002:a17:90a:cd06:: with SMTP id d6mr18843319pju.91.1619405618479; Sun, 25 Apr 2021 19:53:38 -0700 (PDT) Received: from localhost.localdomain ([71.212.144.24]) by smtp.gmail.com with ESMTPSA id e23sm9805680pgg.76.2021.04.25.19.53.37 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Apr 2021 19:53:38 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 02/25] linux-user: Use target_restore_altstack in all sigreturn Date: Sun, 25 Apr 2021 19:53:11 -0700 Message-Id: <20210426025334.1168495-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210426025334.1168495-1-richard.henderson@linaro.org> References: <20210426025334.1168495-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::630; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x630.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+patch=linaro.org@nongnu.org Sender: "Qemu-devel" Note that target_restore_altstack uses the host memory pointer that we have already verified, so TARGET_EFAULT is not a possible return value. Note that using -EFAULT was a bug. Signed-off-by: Richard Henderson --- linux-user/aarch64/signal.c | 6 +----- linux-user/alpha/signal.c | 6 +----- linux-user/arm/signal.c | 9 ++------- linux-user/hexagon/signal.c | 6 +----- linux-user/hppa/signal.c | 8 +------- linux-user/i386/signal.c | 5 +---- linux-user/m68k/signal.c | 5 +---- linux-user/microblaze/signal.c | 6 +----- linux-user/mips/signal.c | 6 +----- linux-user/nios2/signal.c | 8 +------- linux-user/openrisc/signal.c | 5 +---- linux-user/ppc/signal.c | 4 +--- linux-user/riscv/signal.c | 6 +----- linux-user/s390x/signal.c | 6 ++---- linux-user/sh4/signal.c | 7 +------ linux-user/xtensa/signal.c | 6 +----- 16 files changed, 18 insertions(+), 81 deletions(-) -- 2.25.1 diff --git a/linux-user/aarch64/signal.c b/linux-user/aarch64/signal.c index b591790c22..2a1b7dbcdc 100644 --- a/linux-user/aarch64/signal.c +++ b/linux-user/aarch64/signal.c @@ -561,11 +561,7 @@ long do_rt_sigreturn(CPUARMState *env) goto badframe; } - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/alpha/signal.c b/linux-user/alpha/signal.c index 3aa4b339a4..011da0a53b 100644 --- a/linux-user/alpha/signal.c +++ b/linux-user/alpha/signal.c @@ -257,11 +257,7 @@ long do_rt_sigreturn(CPUAlphaState *env) set_sigmask(&set); restore_sigcontext(env, &frame->uc.tuc_mcontext); - if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, - uc.tuc_stack), - 0, env->ir[IR_SP]) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, env->ir[IR_SP]); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/arm/signal.c b/linux-user/arm/signal.c index f21d1535e4..b7a772302f 100644 --- a/linux-user/arm/signal.c +++ b/linux-user/arm/signal.c @@ -685,11 +685,7 @@ static int do_sigframe_return_v2(CPUARMState *env, } } - if (do_sigaltstack(context_addr - + offsetof(struct target_ucontext_v2, tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) { - return 1; - } + target_restore_altstack(&uc->tuc_stack, get_sp_from_cpustate(env)); #if 0 /* Send SIGTRAP if we're single-stepping */ @@ -773,8 +769,7 @@ static long do_rt_sigreturn_v1(CPUARMState *env) goto badframe; } - if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); #if 0 /* Send SIGTRAP if we're single-stepping */ diff --git a/linux-user/hexagon/signal.c b/linux-user/hexagon/signal.c index fde8dc93b7..3854eb4709 100644 --- a/linux-user/hexagon/signal.c +++ b/linux-user/hexagon/signal.c @@ -260,11 +260,7 @@ long do_rt_sigreturn(CPUHexagonState *env) } restore_ucontext(env, &frame->uc); - - if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, - uc.uc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.uc_stack, get_sp_from_cpustate(env)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/hppa/signal.c b/linux-user/hppa/signal.c index d1a58feeb3..578874cf27 100644 --- a/linux-user/hppa/signal.c +++ b/linux-user/hppa/signal.c @@ -187,13 +187,7 @@ long do_rt_sigreturn(CPUArchState *env) set_sigmask(&set); restore_sigcontext(env, &frame->uc.tuc_mcontext); - unlock_user_struct(frame, frame_addr, 0); - - if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, - uc.tuc_stack), - 0, env->gr[30]) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, env->gr[30]); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c index 9320e1d472..3a0a1546a6 100644 --- a/linux-user/i386/signal.c +++ b/linux-user/i386/signal.c @@ -581,10 +581,7 @@ long do_rt_sigreturn(CPUX86State *env) goto badframe; } - if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, - get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/m68k/signal.c b/linux-user/m68k/signal.c index 49ff87c77b..004b59fb61 100644 --- a/linux-user/m68k/signal.c +++ b/linux-user/m68k/signal.c @@ -400,10 +400,7 @@ long do_rt_sigreturn(CPUM68KState *env) if (target_rt_restore_ucontext(env, &frame->uc)) goto badframe; - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/microblaze/signal.c b/linux-user/microblaze/signal.c index cf0707b556..f59a1faf47 100644 --- a/linux-user/microblaze/signal.c +++ b/linux-user/microblaze/signal.c @@ -209,11 +209,7 @@ long do_rt_sigreturn(CPUMBState *env) restore_sigcontext(&frame->uc.tuc_mcontext, env); - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/mips/signal.c b/linux-user/mips/signal.c index 455a8a229a..456fa64f41 100644 --- a/linux-user/mips/signal.c +++ b/linux-user/mips/signal.c @@ -368,11 +368,7 @@ long do_rt_sigreturn(CPUMIPSState *env) set_sigmask(&blocked); restore_sigcontext(env, &frame->rs_uc.tuc_mcontext); - - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, rs_uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; + target_restore_altstack(&frame->rs_uc.tuc_stack, get_sp_from_cpustate(env)); env->active_tc.PC = env->CP0_EPC; mips_set_hflags_isa_mode_from_pc(env); diff --git a/linux-user/nios2/signal.c b/linux-user/nios2/signal.c index 7d535065ed..751ea88811 100644 --- a/linux-user/nios2/signal.c +++ b/linux-user/nios2/signal.c @@ -82,9 +82,7 @@ static int rt_restore_ucontext(CPUNios2State *env, struct target_ucontext *uc, int *pr2) { int temp; - abi_ulong off, frame_addr = env->regs[R_SP]; unsigned long *gregs = uc->tuc_mcontext.gregs; - int err; /* Always make any pending restarted system calls return -EINTR */ /* current->restart_block.fn = do_no_restart_syscall; */ @@ -130,11 +128,7 @@ static int rt_restore_ucontext(CPUNios2State *env, struct target_ucontext *uc, __get_user(env->regs[R_RA], &gregs[23]); __get_user(env->regs[R_SP], &gregs[28]); - off = offsetof(struct target_rt_sigframe, uc.tuc_stack); - err = do_sigaltstack(frame_addr + off, 0, get_sp_from_cpustate(env)); - if (err == -EFAULT) { - return 1; - } + target_restore_altstack(&uc->tuc_stack, get_sp_from_cpustate(env)); *pr2 = env->regs[2]; return 0; diff --git a/linux-user/openrisc/signal.c b/linux-user/openrisc/signal.c index 232ad82b98..86f94d7f76 100644 --- a/linux-user/openrisc/signal.c +++ b/linux-user/openrisc/signal.c @@ -158,10 +158,7 @@ long do_rt_sigreturn(CPUOpenRISCState *env) set_sigmask(&set); restore_sigcontext(env, &frame->uc.tuc_mcontext); - if (do_sigaltstack(frame_addr + offsetof(target_rt_sigframe, uc.tuc_stack), - 0, frame_addr) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, frame_addr); unlock_user_struct(frame, frame_addr, 0); return cpu_get_gpr(env, 11); diff --git a/linux-user/ppc/signal.c b/linux-user/ppc/signal.c index b78613f7c8..79f265f82e 100644 --- a/linux-user/ppc/signal.c +++ b/linux-user/ppc/signal.c @@ -656,9 +656,7 @@ long do_rt_sigreturn(CPUPPCState *env) if (do_setcontext(&rt_sf->uc, env, 1)) goto sigsegv; - do_sigaltstack(rt_sf_addr - + offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, env->gpr[1]); + target_restore_altstack(&rt_sf->uc.tuc_stack, env->gpr[1]); unlock_user_struct(rt_sf, rt_sf_addr, 1); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/riscv/signal.c b/linux-user/riscv/signal.c index 67a95dbc7b..81d1129da3 100644 --- a/linux-user/riscv/signal.c +++ b/linux-user/riscv/signal.c @@ -192,11 +192,7 @@ long do_rt_sigreturn(CPURISCVState *env) } restore_ucontext(env, &frame->uc); - - if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, - uc.uc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.uc_stack, get_sp_from_cpustate(env)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/s390x/signal.c b/linux-user/s390x/signal.c index 7107c5fb53..73806f5472 100644 --- a/linux-user/s390x/signal.c +++ b/linux-user/s390x/signal.c @@ -307,10 +307,8 @@ long do_rt_sigreturn(CPUS390XState *env) goto badframe; } - if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0, - get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); + unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/sh4/signal.c b/linux-user/sh4/signal.c index 29c1ee30e6..684f18da58 100644 --- a/linux-user/sh4/signal.c +++ b/linux-user/sh4/signal.c @@ -323,12 +323,7 @@ long do_rt_sigreturn(CPUSH4State *regs) set_sigmask(&blocked); restore_sigcontext(regs, &frame->uc.tuc_mcontext); - - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(regs)) == -EFAULT) { - goto badframe; - } + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(regs)); unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; diff --git a/linux-user/xtensa/signal.c b/linux-user/xtensa/signal.c index 590f0313ff..22ec6cdeb9 100644 --- a/linux-user/xtensa/signal.c +++ b/linux-user/xtensa/signal.c @@ -253,12 +253,8 @@ long do_rt_sigreturn(CPUXtensaState *env) set_sigmask(&set); restore_sigcontext(env, frame); + target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env)); - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -TARGET_EFAULT) { - goto badframe; - } unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN;