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Sun, 16 Nov 2025 17:40:51 -0800 (PST) Received: from [10.0.0.22] ([185.213.193.149]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4ee1c21ea34sm18246551cf.30.2025.11.16.17.40.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 16 Nov 2025 17:40:50 -0800 (PST) From: Gabriel Brookman Date: Sun, 16 Nov 2025 20:40:26 -0500 Subject: [PATCH RFC v2 09/10] tests/tcg: added test for MTE canonical and NAT MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251116-feat-mte4-v2-9-9a7122b7fa76@gmail.com> References: <20251116-feat-mte4-v2-0-9a7122b7fa76@gmail.com> In-Reply-To: <20251116-feat-mte4-v2-0-9a7122b7fa76@gmail.com> To: qemu-devel@nongnu.org Cc: Peter Maydell , Gustavo Romero , qemu-arm@nongnu.org, Gabriel Brookman X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1763343639; l=2238; i=brookmangabriel@gmail.com; s=20251009; h=from:subject:message-id; bh=omw1g4lZFe7vILkkcTfo81X8l2MlNL9SA0t8yBt/E6w=; 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Signed-off-by: Gabriel Brookman --- tests/tcg/aarch64/Makefile.target | 2 +- tests/tcg/aarch64/mte-11.c | 46 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+), 1 deletion(-) diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target index 6203ac9b51..141c9db9c4 100644 --- a/tests/tcg/aarch64/Makefile.target +++ b/tests/tcg/aarch64/Makefile.target @@ -64,7 +64,7 @@ AARCH64_TESTS += bti-2 # MTE Tests ifneq ($(CROSS_CC_HAS_ARMV8_MTE),) -AARCH64_TESTS += mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 mte-9 mte-10 +AARCH64_TESTS += mte-1 mte-2 mte-3 mte-4 mte-5 mte-6 mte-7 mte-8 mte-9 mte-10 mte-11 mte-%: CFLAGS += $(CROSS_CC_HAS_ARMV8_MTE) endif diff --git a/tests/tcg/aarch64/mte-11.c b/tests/tcg/aarch64/mte-11.c new file mode 100644 index 0000000000..86f2206e41 --- /dev/null +++ b/tests/tcg/aarch64/mte-11.c @@ -0,0 +1,46 @@ +/* + * Memory tagging, canonical tag checking + * + * Copyright (c) 2021 Linaro Ltd + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "mte.h" + +void pass(int sig, siginfo_t *info, void *uc) +{ + assert(info->si_code == SEGV_MTESERR); + exit(0); +} + +int main(int ac, char **av) +{ + struct sigaction sa; + int *p0, *p1, *p2; + long excl = 1; + + /* + * NOTE FOR REVIEWERS: to run this test locally, I modified + * enable_mte to also activate canonical tagging checking by writing + * to the appropriate MTX control bits. I am not sure how to modify + * the test so that it works without that modification. Input appreciated. + */ + enable_mte(PR_MTE_TCF_SYNC); + p0 = alloc_mte_mem(sizeof(*p0)); + + /* shouldn't fault on a canonical ptr */ + *p0 = 32; + + /* decanonicalize ptr */ + p0 = (int *) (((long) p0) | (1ll << 56)); + + memset(&sa, 0, sizeof(sa)); + sa.sa_sigaction = pass; + sa.sa_flags = SA_SIGINFO; + sigaction(SIGSEGV, &sa, NULL); + + /* should fault on our modified ptr */ + *p0 = 64; + + abort(); +} -- 2.51.2