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[66.75.72.255]) by smtp.gmail.com with ESMTPSA id e1sm2229900pfn.187.2019.03.29.17.59.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 29 Mar 2019 17:59:09 -0700 (PDT) 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; bh=ZWpQIT9YQySoKjzsWYha6BN9w4EITOUpOlIb69f+q0c=; b=vBsbT/5SgkzQwN36hGVORZmKZdaZ+X+wKaldsJy+Xu0hKjO5m7aB1AQbTmlwbkHZPJ 2KfPwPXZ79dCGNjbz4RzdD3eYCKT023PRifJi/zQGM2Nlk7cjkj0tF5+kRcD/O+NQCkQ 9LIpNBxJOFZjAF2edPZZQBFJdTYC6fR/Ju8jx2l5X1PrqAPr3m5vYRmDvGrhBP+G7Diy jC/c7fpfxclOrMLKTrQfGTYao8yCo4y2BQtp1DiJHp2gD4OU9bQOuFh31qVhipMCCVyq OlTIMa6UB9T2TX5Vi7AqcJ+VHsirzDMY+7Y1O+RAx23DcUcPa6Kz6839XMZycgauIvI7 UThw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ZWpQIT9YQySoKjzsWYha6BN9w4EITOUpOlIb69f+q0c=; b=Kn0xpU//Dzh9PnOI36s7sVvmvV9p68mn2FLEV/3NewgupDP5ixeC3cJA0wS/hp/+FK YZa2XA2UQx55so5+AjSWZxmfEoMuOVbSfaya+NjoY2NR54gDUGy9Y19K4LoRnOW8/bKj Kkuk4hJo6Ipo4wcNmI1BU5v4mPXE6dW5+HTh/C6JtXDqMVs1fAYFXjiehYML5chTsBz0 PpB2qdbA5QH5MXs4bjZwT0ETD8gp8FLiaMqqSelatOizOKZxynoQbWIwh5iH/lT47wUu ykA5FkjGFfjlT+tvUYOst33Y0jpdE5ycQfrw1HuybcMmcPJcDFpqnA4qnpKyXamlu9q8 naWA== X-Gm-Message-State: APjAAAXDX9/ij8EnLuIDMx0diNIetTn7BXMKQiznPwEk84ECjvpT+ro6 vCRfdtF1x34rbjPL9OO4a4KaTDQnYW4= X-Google-Smtp-Source: APXvYqze3iFSiYzNSs8BF2ZEbY9zRsCe2NS2XtQOA2wIUuUPiJ9GddvOEcrgptBCAs7yzgjrDMuD0A== X-Received: by 2002:a63:84c7:: with SMTP id k190mr48616373pgd.255.1553907550171; Fri, 29 Mar 2019 17:59:10 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 29 Mar 2019 14:59:00 -1000 Message-Id: <20190330005900.17282-5-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190330005900.17282-1-richard.henderson@linaro.org> References: <20190330005900.17282-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::543 Subject: [Qemu-devel] [PATCH v4 4/4] tests/tcg/aarch64: Add bti smoke test X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, alex.bennee@linaro.org, ramana.radhakrishnan@arm.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson --- tests/tcg/aarch64/bti-1.c | 62 +++++++++++++++++++++++++++ tests/tcg/aarch64/bti-crt.inc.c | 69 +++++++++++++++++++++++++++++++ tests/tcg/aarch64/Makefile.target | 3 ++ 3 files changed, 134 insertions(+) create mode 100644 tests/tcg/aarch64/bti-1.c create mode 100644 tests/tcg/aarch64/bti-crt.inc.c diff --git a/tests/tcg/aarch64/bti-1.c b/tests/tcg/aarch64/bti-1.c new file mode 100644 index 0000000000..61924f0d7a --- /dev/null +++ b/tests/tcg/aarch64/bti-1.c @@ -0,0 +1,62 @@ +/* + * Branch target identification, basic notskip cases. + */ + +#include "bti-crt.inc.c" + +static void skip2_sigill(int sig, siginfo_t *info, ucontext_t *uc) +{ + uc->uc_mcontext.pc +=3D 8; + uc->uc_mcontext.pstate =3D 1; +} + +#define NOP "nop" +#define BTI_N "hint #32" +#define BTI_C "hint #34" +#define BTI_J "hint #36" +#define BTI_JC "hint #38" + +#define BTYPE_1(DEST) \ + asm("mov %0,#1; adr x16, 1f; br x16; 1: " DEST "; mov %0,#0" \ + : "=3Dr"(skipped) : : "x16") + +#define BTYPE_2(DEST) \ + asm("mov %0,#1; adr x16, 1f; blr x16; 1: " DEST "; mov %0,#0" \ + : "=3Dr"(skipped) : : "x16", "x30") + +#define BTYPE_3(DEST) \ + asm("mov %0,#1; adr x15, 1f; br x15; 1: " DEST "; mov %0,#0" \ + : "=3Dr"(skipped) : : "x15") + +#define TEST(WHICH, DEST, EXPECT) \ + do { WHICH(DEST); fail +=3D skipped ^ EXPECT; } while (0) + + +int main() +{ + int fail =3D 0; + int skipped; + + /* Signal-like with SA_SIGINFO. */ + signal_info(SIGILL, skip2_sigill); + + TEST(BTYPE_1, NOP, 1); + TEST(BTYPE_1, BTI_N, 1); + TEST(BTYPE_1, BTI_C, 0); + TEST(BTYPE_1, BTI_J, 0); + TEST(BTYPE_1, BTI_JC, 0); + + TEST(BTYPE_2, NOP, 1); + TEST(BTYPE_2, BTI_N, 1); + TEST(BTYPE_2, BTI_C, 0); + TEST(BTYPE_2, BTI_J, 1); + TEST(BTYPE_2, BTI_JC, 0); + + TEST(BTYPE_3, NOP, 1); + TEST(BTYPE_3, BTI_N, 1); + TEST(BTYPE_3, BTI_C, 1); + TEST(BTYPE_3, BTI_J, 0); + TEST(BTYPE_3, BTI_JC, 0); + + return fail; +} diff --git a/tests/tcg/aarch64/bti-crt.inc.c b/tests/tcg/aarch64/bti-crt.in= c.c new file mode 100644 index 0000000000..bb363853de --- /dev/null +++ b/tests/tcg/aarch64/bti-crt.inc.c @@ -0,0 +1,69 @@ +/* + * Minimal user-environment for testing BTI. + * + * Normal libc is not built with BTI support enabled, and so could + * generate a BTI TRAP before ever reaching main. + */ + +#include +#include +#include +#include + +int main(void); + +void _start(void) +{ + exit(main()); +} + +void exit(int ret) +{ + register int x0 __asm__("x0") =3D ret; + register int x8 __asm__("x8") =3D __NR_exit; + + asm volatile("svc #0" : : "r"(x0), "r"(x8)); + __builtin_unreachable(); +} + +/* + * Irritatingly, the user API struct sigaction does not match the + * kernel API struct sigaction. So for simplicity, isolate the + * kernel ABI here, and make this act like signal. + */ +void signal_info(int sig, void (*fn)(int, siginfo_t *, ucontext_t *)) +{ + struct kernel_sigaction { + void (*handler)(int, siginfo_t *, ucontext_t *); + unsigned long flags; + unsigned long restorer; + unsigned long mask; + } sa =3D { fn, SA_SIGINFO, 0, 0 }; + + register int x0 __asm__("x0") =3D sig; + register void *x1 __asm__("x1") =3D &sa; + register void *x2 __asm__("x2") =3D 0; + register int x3 __asm__("x3") =3D sizeof(unsigned long); + register int x8 __asm__("x8") =3D __NR_rt_sigaction; + + asm volatile("svc #0" + : : "r"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x8) : "memory= "); +} + +/* + * Create the PT_NOTE that will enable BTI in the page tables. + * This will be created by the compiler with -mbranch-protection=3Dstandar= d, + * but as of 2019-03-29, this is has not been committed to gcc mainline. + * This will probably be in GCC10. + */ +asm(".section .note.gnu.property,\"a\"\n\ + .align 3\n\ + .long 4\n\ + .long 16\n\ + .long 5\n\ + .string \"GNU\"\n\ + .long 0xc0000000\n\ + .long 4\n\ + .long 1\n\ + .align 3\n\ + .previous"); diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile= .target index 2bb914975b..21da3bc37f 100644 --- a/tests/tcg/aarch64/Makefile.target +++ b/tests/tcg/aarch64/Makefile.target @@ -18,4 +18,7 @@ run-fcvt: fcvt AARCH64_TESTS +=3D pauth-1 run-pauth-%: QEMU +=3D -cpu max =20 +AARCH64_TESTS +=3D bti-1 +bti-1: LDFLAGS +=3D -nostartfiles -nodefaultlibs -nostdlib + TESTS:=3D$(AARCH64_TESTS) --=20 2.17.1