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[173.198.77.218]) by smtp.gmail.com with ESMTPSA id ns18sm12091020pjb.31.2021.08.02.21.18.38 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Aug 2021 21:18:38 -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=JXEm0LQzBp7FYdF62IKS2HTHAwaTAwDqUq6VzQ5+a94=; b=uaLES6g5HOysHgzE5iXrqj9z7/HswoB9aGJdJ5g/rGBriGRdcSqVrRhqGTMFDCorJB EOXD32pIuWrPLJg97vwgzyziZG0adoWvzNkpc5SJi3f2J9CoXdLuKwcZ5Af1rUps22/N 9Hh8rjx8nQs938JHSUwrZLxzn4dsCTKI3WdjZSvEXe1PNpIc/IVi7GSVtJ3JoZxTxv+A zLzyBJuMNMpHrJNFxSaPYsb5P+VLNtRhpBBZNfEqU7SkNtrFUJGBvTiE+1h8rv/XTdmi YpShGLfudmIV4lSk+J9qnQzArfVmP8wCt6ulUuvmIR2KOENCOGVEwy79mhF1EllkZgQb yd7Q== 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=JXEm0LQzBp7FYdF62IKS2HTHAwaTAwDqUq6VzQ5+a94=; b=in3uI2H6w4tfegN9x6qH3+sN3tm44ex6ixl9Wg9I6AMculVjVwNv1//JC7xf1mvKmo fmI0Hmz675IQp6ji1hbVF3nmbMUoCX13nz+12EcNYh2cp7Wkv4ArCFoFhz7QwN+RHK7L xMkS0WER1AhHsWsJsmH68Hf/hjcveOV9hzs+gsTYSZIqqMKOMbQXLM3NwygwBc3efpMB MM/THCNWgYLx1Y9mt6NbCPfHd3iTLmScuH+n2NNEDm/iQti3sdKH2lBv/IZyG9dBheOc FVuKCoZ6GokO3QKcEYiev5y+gDmwIS4ZRwOGIGGNO0GsUri2m2DiLdBntJ5wX90v5FLH aDRg== X-Gm-Message-State: AOAM531iTgxCbIatlIzaRcwIzT6v61SJ/jiatbzybsPkp8c5/dl5VSND 8r6VChNeDZOHqbp89ZAsCqYAj9I21C4g9w== X-Google-Smtp-Source: ABdhPJx0o00qOSrf6kbYzlIE5jnqtxvIDsZmW9u/rxc+OsNJFCJwiybpI6kQEYPKjbhMb8ktmZ7AsA== X-Received: by 2002:a63:6e83:: with SMTP id j125mr290260pgc.12.1627964319258; Mon, 02 Aug 2021 21:18:39 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 44/55] tests/tcg/multiarch: Add sigbus.c Date: Mon, 2 Aug 2021 18:14:32 -1000 Message-Id: <20210803041443.55452-45-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210803041443.55452-1-richard.henderson@linaro.org> References: <20210803041443.55452-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: pass client-ip=2607:f8b0:4864:20::632; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x632.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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1627965378329100001 Content-Type: text/plain; charset="utf-8" A mostly generic test for unaligned access raising SIGBUS. Signed-off-by: Richard Henderson --- tests/tcg/multiarch/sigbus.c | 68 ++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 tests/tcg/multiarch/sigbus.c diff --git a/tests/tcg/multiarch/sigbus.c b/tests/tcg/multiarch/sigbus.c new file mode 100644 index 0000000000..8134c5fd56 --- /dev/null +++ b/tests/tcg/multiarch/sigbus.c @@ -0,0 +1,68 @@ +#define _GNU_SOURCE 1 + +#include +#include +#include +#include + + +unsigned long long x =3D 0x8877665544332211ull; +void * volatile p =3D (void *)&x + 1; + +void sigbus(int sig, siginfo_t *info, void *uc) +{ + assert(sig =3D=3D SIGBUS); + assert(info->si_signo =3D=3D SIGBUS); +#ifdef BUS_ADRALN + assert(info->si_code =3D=3D BUS_ADRALN); +#endif + assert(info->si_addr =3D=3D p); + exit(EXIT_SUCCESS); +} + +int main() +{ + struct sigaction sa =3D { + .sa_sigaction =3D sigbus, + .sa_flags =3D SA_SIGINFO + }; + int allow_fail =3D 0; + int tmp; + + tmp =3D sigaction(SIGBUS, &sa, NULL); + assert(tmp =3D=3D 0); + + /* + * Select an operation that's likely to enforce alignment. + * On many guests that support unaligned accesses by default, + * this is often an atomic operation. + */ +#if defined(__aarch64__) + asm volatile("ldxr %w0,[%1]" : "=3Dr"(tmp) : "r"(p) : "memory"); +#elif defined(__alpha__) + asm volatile("ldl_l %0,0(%1)" : "=3Dr"(tmp) : "r"(p) : "memory"); +#elif defined(__arm__) + asm volatile("ldrex %0,[%1]" : "=3Dr"(tmp) : "r"(p) : "memory"); +#elif defined(__powerpc__) + asm volatile("lwarx %0,0,%1" : "=3Dr"(tmp) : "r"(p) : "memory"); +#elif defined(__riscv_atomic) + asm volatile("lr.w %0,(%1)" : "=3Dr"(tmp) : "r"(p) : "memory"); +#else + /* No insn known to fault unaligned -- try for a straight load. */ + allow_fail =3D 1; + tmp =3D *(volatile int *)p; +#endif + + assert(allow_fail); + + /* + * We didn't see a signal. + * We might as well validate the unaligned load worked. + */ + if (BYTE_ORDER =3D=3D LITTLE_ENDIAN) { + assert(tmp =3D=3D 0x55443322); + } else { + assert(tmp =3D=3D 0x77665544); + } + return EXIT_SUCCESS; +} --=20 2.25.1