From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id DEFD4C433EF for ; Thu, 10 Feb 2022 11:41:46 +0000 (UTC) Received: from localhost ([::1]:46278 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nI7pZ-0006pu-R7 for qemu-devel@archiver.kernel.org; Thu, 10 Feb 2022 06:41:45 -0500 Received: from eggs.gnu.org ([209.51.188.92]:42400) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI7ef-0003ie-FI for qemu-devel@nongnu.org; Thu, 10 Feb 2022 06:30:32 -0500 Received: from [2a00:1450:4864:20::629] (port=45584 helo=mail-ej1-x629.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nI7ed-0002Vp-5O for qemu-devel@nongnu.org; Thu, 10 Feb 2022 06:30:29 -0500 Received: by mail-ej1-x629.google.com with SMTP id s21so14365260ejx.12 for ; Thu, 10 Feb 2022 03:30:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=9qy7IV48skw6PiK32u8+FO1zaKIr1zsoKUR1tPCSI0c=; b=wVmNAdBG53HscQ0hYgt7SAJbb4aIflYY8gWqyGKt4d2ZpkFLsRK3NMoswRZanLHMGE gCytAEagVH+Bn2mykwZjtPL/DHRdA0uYjODktv+2gzleeJWs307QGicWIkeWad3/Sseu pWUx2fgq6QtKRLR7VwmwZJNrHLt0bektrPzWno9ddPcGY1QrcswLgs9M0H429CcEKPta uLRnVrXkxojsiid9ACIfsqi9qoQDLlOVogZWv9t4CvHNe84G7AWJP83ndE/ie7oDTXX1 GRHK2+PNqVcBOHpbkbmMaRNrNkoj6p0/EpqUGp74LMdhATvxPZQKOxQfH7M8V0ojnyai 6+DQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=9qy7IV48skw6PiK32u8+FO1zaKIr1zsoKUR1tPCSI0c=; b=2xDQ++0LsgdsmtRmNOJnQ8UogTTwHzqtmGbpzulE8i2tEUtUFQkYRtLliRX28S1oC7 QqNKQRRUWFvOUV08k2d7IKS6GA03Yr92cCObyHq1NNCMzrbw7Ua7Avn/OmoFTfEa2gj9 0nrRVMZBZqEISsuDTnmyRhSG0ZvxlbgVvoufr6YYz8QhEtZ2Q5LvCpe5ZrSkzi0c+nst ILyprRnRe1GIRx3KaelAiyBZqKrZtefF5du6NMkcr7kLCiShrtzjPe8oW94vCoHe2fca 9iWMX5B2gauCaMuebCU6FUmq/P9BkmtUiEQe9eNt75clZCve4lk1AoXXJ3MWA3SGJzKO QT6g== X-Gm-Message-State: AOAM5305T6M21wqOQK81hbbk9zAYcV86XFDoaXNVWtLDhtFzBjQk+i1w t6QIdaZnczJqBLuVbriPuZtBWA== X-Google-Smtp-Source: ABdhPJwfVX22NAq1VhDZ/haNQlOJHs0z3kFlnw55yJ9GZw+NZJvmvO1VnEGC5oLvMXGmPKqRS2tPfw== X-Received: by 2002:a17:907:7207:: with SMTP id dr7mr5965867ejc.500.1644492625806; Thu, 10 Feb 2022 03:30:25 -0800 (PST) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id ku15sm5624043ejc.25.2022.02.10.03.30.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Feb 2022 03:30:22 -0800 (PST) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id B81B91FFBA; Thu, 10 Feb 2022 11:30:21 +0000 (GMT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org, peter.maydell@linaro.org Subject: [PATCH v5 2/2] tests/tcg: port SYS_HEAPINFO to a system test Date: Thu, 10 Feb 2022 11:30:21 +0000 Message-Id: <20220210113021.3799514-3-alex.bennee@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220210113021.3799514-1-alex.bennee@linaro.org> References: <20220210113021.3799514-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::629 (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::629; envelope-from=alex.bennee@linaro.org; helo=mail-ej1-x629.google.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 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, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Cc: qemu-arm@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This allows us to check our new SYS_HEAPINFO implementation generates sane values. Signed-off-by: Alex Bennée --- v5 - static init of heapinfo structure - clean-up comment on why we can test stack position - add memory clobber for semicall - test we can read/write to a portion of the heap - fix MAINTAINERS --- tests/tcg/aarch64/system/semiheap.c | 93 +++++++++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 94 insertions(+) create mode 100644 tests/tcg/aarch64/system/semiheap.c diff --git a/tests/tcg/aarch64/system/semiheap.c b/tests/tcg/aarch64/system/semiheap.c new file mode 100644 index 0000000000..4ed258476d --- /dev/null +++ b/tests/tcg/aarch64/system/semiheap.c @@ -0,0 +1,93 @@ +/* + * Semihosting System HEAPINFO Test + * + * Copyright (c) 2021 Linaro Ltd + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include +#include +#include + +#define SYS_HEAPINFO 0x16 + +uintptr_t __semi_call(uintptr_t type, uintptr_t arg0) +{ + register uintptr_t t asm("x0") = type; + register uintptr_t a0 asm("x1") = arg0; + asm("hlt 0xf000" + : "=r" (t) + : "r" (t), "r" (a0) + : "memory" ); + + return t; +} + +int main(int argc, char *argv[argc]) +{ + struct { + void *heap_base; + void *heap_limit; + void *stack_base; + void *stack_limit; + } info = { }; + void *ptr_to_info = (void *) &info; + uint32_t *ptr_to_heap; + int i; + + ml_printf("Semihosting Heap Info Test\n"); + + __semi_call(SYS_HEAPINFO, (uintptr_t) &ptr_to_info); + + if (info.heap_base == NULL || info.heap_limit == NULL) { + ml_printf("null heap: %p -> %p\n", info.heap_base, info.heap_limit); + return -1; + } + + /* Error if heap base is above limit */ + if ((uintptr_t) info.heap_base >= (uintptr_t) info.heap_limit) { + ml_printf("heap base %p >= heap_limit %p\n", + info.heap_base, info.heap_limit); + return -2; + } + + if (info.stack_base == NULL) { + ml_printf("null stack: %p -> %p\n", info.stack_base, info.stack_limit); + return -3; + } + + /* + * boot.S put our stack somewhere inside the data segment of the + * ELF file, and we know that SYS_HEAPINFO won't pick a range + * that overlaps with part of a loaded ELF file. So the info + * struct (on the stack) should not be inside the reported heap. + */ + if (ptr_to_info > info.heap_base && ptr_to_info < info.heap_limit) { + ml_printf("info appears to be inside the heap: %p in %p:%p\n", + ptr_to_info, info.heap_base, info.heap_limit); + return -4; + } + + ml_printf("heap: %p -> %p\n", info.heap_base, info.heap_limit); + ml_printf("stack: %p <- %p\n", info.stack_limit, info.stack_base); + + /* finally can we read/write the heap */ + ptr_to_heap = (uint32_t *) info.heap_base; + for (i = 0; i < 512; i++) { + *ptr_to_heap++ = i; + } + ptr_to_heap = (uint32_t *) info.heap_base; + for (i = 0; i < 512; i++) { + uint32_t tmp = *ptr_to_heap; + if (tmp != i) { + ml_printf("unexpected value in heap: %d @ %p", tmp, ptr_to_heap); + return -5; + } + ptr_to_heap++; + } + ml_printf("r/w to heap upto %p\n", ptr_to_heap); + + ml_printf("Passed HeapInfo checks\n"); + return 0; +} diff --git a/MAINTAINERS b/MAINTAINERS index b0b845f445..251f96af9e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3536,6 +3536,7 @@ S: Maintained F: semihosting/ F: include/semihosting/ F: tests/tcg/multiarch/arm-compat-semi/ +F: tests/tcg/aarch64/system/semiheap.c Multi-process QEMU M: Elena Ufimtseva -- 2.30.2