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[209.51.188.17]) by mx.google.com with ESMTPS id gg12-20020a056214252c00b0062755601ed5si10905363qvb.282.2023.07.03.06.54.02 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 03 Jul 2023 06:54:02 -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=yZ9K7324; 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] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qGJzg-0000TY-8X; Mon, 03 Jul 2023 09:53:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qGJzf-0000T6-7O for qemu-devel@nongnu.org; Mon, 03 Jul 2023 09:53:31 -0400 Received: from mail-wm1-x335.google.com ([2a00:1450:4864:20::335]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qGJzd-00081U-DM for qemu-devel@nongnu.org; Mon, 03 Jul 2023 09:53:30 -0400 Received: by mail-wm1-x335.google.com with SMTP id 5b1f17b1804b1-3fbc1218262so54673825e9.3 for ; Mon, 03 Jul 2023 06:53:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688392408; x=1690984408; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=w6WYXW4Y2CRXzJldZHFZiOGa1GgkyQ7N7MNmvXCUxfM=; b=yZ9K7324qeFp4nFloVx8dob12Bc1ydtmXPOANDeAunnpBTm3/jaW/8K4faEQxjNCkK jFLQdve+mN4MmXPx25tsorihiHYl6kGCR3pbmwwayQKWG+tXVm5pBLVozZnmOHPie521 g5sWwDUGMaY8/H8dB8dc4ZUyzlWTepTMxPyzrhXpoOg1mzgsn6+0bp+bb0WwHeA4eH76 FSpSYIbs+jbJr23rEs9JWAL3kxbHuDlBD8xfjO3ZNj8IJ1KZH5KeLQ3oJ24jP6xrXVK4 aUXVpUvrOEg4KCzWmiEFiXiZU0EBgoiGbG9RLsDMfxx/WlWmkjrcFD3wVrDltzyjhoyP 7G3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688392408; x=1690984408; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=w6WYXW4Y2CRXzJldZHFZiOGa1GgkyQ7N7MNmvXCUxfM=; b=DVH7EDMV9PxL4IYeWeAu0qoHtXWOi5qfMpPKwSFkKIBBKc4UYNHIigLDvpbMxY2HpG V5WoB/r/oOUsnLfFcOB/po0n5pUiVyi4sb/o02+A/bAXijJvTdSXghp8aGmJMBctgRH8 yLBk6TOdqvaksTz/ZAL5Sq13MKp3SF0Bo7rzl1xgISlkiIdNdJ3kGYlfrvbHzBsRRPVY 5tb+T/DGxrO6CDyQw01WAA9pNzb9hDxeXbmTGSfDybt3gq7Oq2Lp2u/2jTszITPpVEua fJ1ZESOQmDby1XOOo0kU+tZDbrocaQHJmpjmcGZtlWhZmtrZyEYbd6iEcUu7CvSdlXuY KtDg== X-Gm-Message-State: ABy/qLYtzEsz3sc8PO8elj3wH+t/ISyiv/9kn1i/OQ4Ok9RnkQqwn6Wh Nr/lne2TY/6fINd5mS/LcxX/Mg== X-Received: by 2002:a7b:cb94:0:b0:3fb:dbd0:a7e7 with SMTP id m20-20020a7bcb94000000b003fbdbd0a7e7mr1704581wmi.39.1688392407875; Mon, 03 Jul 2023 06:53:27 -0700 (PDT) Received: from zen.linaroharston ([85.9.250.243]) by smtp.gmail.com with ESMTPSA id n9-20020a1c7209000000b003fbacc853ccsm15777974wmc.18.2023.07.03.06.53.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jul 2023 06:53:27 -0700 (PDT) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 972C81FFD7; Mon, 3 Jul 2023 14:44:31 +0100 (BST) From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, Ilya Leoshkevich , =?utf-8?q?Alex_Benn=C3=A9e?= , Laurent Vivier Subject: [PULL 33/38] linux-user: Emulate /proc/self/smaps Date: Mon, 3 Jul 2023 14:44:22 +0100 Message-Id: <20230703134427.1389440-34-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230703134427.1389440-1-alex.bennee@linaro.org> References: <20230703134427.1389440-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::335; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x335.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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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-bounces+patch=linaro.org@nongnu.org From: Ilya Leoshkevich /proc/self/smaps is an extension of /proc/self/maps: it provides the same lines, plus additional information about each range. GDB uses /proc/self/smaps when available, which means that generate-core-file tries it first before falling back to /proc/self/maps. This, in turn, causes it to dump the host mappings, since /proc/self/smaps is not emulated and is just passed through. Fix by emulating /proc/self/smaps. Provide true values only for Size, KernelPageSize, MMUPageSize and VmFlags. Leave all other values at 0, which is a valid conservative estimate. Signed-off-by: Ilya Leoshkevich Reviewed-by: Richard Henderson Message-Id: <20230621203627.1808446-4-iii@linux.ibm.com> Signed-off-by: Alex Bennée Message-Id: <20230630180423.558337-34-alex.bennee@linaro.org> diff --git a/linux-user/syscall.c b/linux-user/syscall.c index ecd9f5e23d..08162cc966 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8042,7 +8042,36 @@ static int open_self_cmdline(CPUArchState *cpu_env, int fd) return 0; } -static int open_self_maps(CPUArchState *cpu_env, int fd) +static void show_smaps(int fd, unsigned long size) +{ + unsigned long page_size_kb = TARGET_PAGE_SIZE >> 10; + unsigned long size_kb = size >> 10; + + dprintf(fd, "Size: %lu kB\n" + "KernelPageSize: %lu kB\n" + "MMUPageSize: %lu kB\n" + "Rss: 0 kB\n" + "Pss: 0 kB\n" + "Pss_Dirty: 0 kB\n" + "Shared_Clean: 0 kB\n" + "Shared_Dirty: 0 kB\n" + "Private_Clean: 0 kB\n" + "Private_Dirty: 0 kB\n" + "Referenced: 0 kB\n" + "Anonymous: 0 kB\n" + "LazyFree: 0 kB\n" + "AnonHugePages: 0 kB\n" + "ShmemPmdMapped: 0 kB\n" + "FilePmdMapped: 0 kB\n" + "Shared_Hugetlb: 0 kB\n" + "Private_Hugetlb: 0 kB\n" + "Swap: 0 kB\n" + "SwapPss: 0 kB\n" + "Locked: 0 kB\n" + "THPeligible: 0\n", size_kb, page_size_kb, page_size_kb); +} + +static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps) { CPUState *cpu = env_cpu(cpu_env); TaskState *ts = cpu->opaque; @@ -8089,6 +8118,18 @@ static int open_self_maps(CPUArchState *cpu_env, int fd) } else { dprintf(fd, "\n"); } + if (smaps) { + show_smaps(fd, max - min); + dprintf(fd, "VmFlags:%s%s%s%s%s%s%s%s\n", + (flags & PAGE_READ) ? " rd" : "", + (flags & PAGE_WRITE_ORG) ? " wr" : "", + (flags & PAGE_EXEC) ? " ex" : "", + e->is_priv ? "" : " sh", + (flags & PAGE_READ) ? " mr" : "", + (flags & PAGE_WRITE_ORG) ? " mw" : "", + (flags & PAGE_EXEC) ? " me" : "", + e->is_priv ? "" : " ms"); + } } } @@ -8103,11 +8144,25 @@ static int open_self_maps(CPUArchState *cpu_env, int fd) " --xp 00000000 00:00 0", TARGET_VSYSCALL_PAGE, TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE); dprintf(fd, "%*s%s\n", 73 - count, "", "[vsyscall]"); + if (smaps) { + show_smaps(fd, TARGET_PAGE_SIZE); + dprintf(fd, "VmFlags: ex\n"); + } #endif return 0; } +static int open_self_maps(CPUArchState *cpu_env, int fd) +{ + return open_self_maps_1(cpu_env, fd, false); +} + +static int open_self_smaps(CPUArchState *cpu_env, int fd) +{ + return open_self_maps_1(cpu_env, fd, true); +} + static int open_self_stat(CPUArchState *cpu_env, int fd) { CPUState *cpu = env_cpu(cpu_env); @@ -8459,6 +8514,7 @@ int do_guest_openat(CPUArchState *cpu_env, int dirfd, const char *pathname, const struct fake_open *fake_open; static const struct fake_open fakes[] = { { "maps", open_self_maps, is_proc_myself }, + { "smaps", open_self_smaps, is_proc_myself }, { "stat", open_self_stat, is_proc_myself }, { "auxv", open_self_auxv, is_proc_myself }, { "cmdline", open_self_cmdline, is_proc_myself },