From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: qemu-arm@nongnu.org
Subject: [PATCH 1/2] target/arm: Check PAGE_WRITE_ORG for MTE writeability
Date: Thu, 1 Apr 2021 22:37:27 -0700 [thread overview]
Message-ID: <20210402053728.265173-2-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210402053728.265173-1-richard.henderson@linaro.org>
We can remove PAGE_WRITE when (internally) marking a page
read-only because it contains translated code.
This can be triggered by tests/tcg/aarch64/bti-2, after
having serviced SIGILL trampolines on the stack.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/mte_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/arm/mte_helper.c b/target/arm/mte_helper.c
index 0bbb9ec346..8be17e1b70 100644
--- a/target/arm/mte_helper.c
+++ b/target/arm/mte_helper.c
@@ -83,7 +83,7 @@ static uint8_t *allocation_tag_mem(CPUARMState *env, int ptr_mmu_idx,
uint8_t *tags;
uintptr_t index;
- if (!(flags & (ptr_access == MMU_DATA_STORE ? PAGE_WRITE : PAGE_READ))) {
+ if (!(flags & (ptr_access == MMU_DATA_STORE ? PAGE_WRITE_ORG : PAGE_READ))) {
/* SIGSEGV */
arm_cpu_tlb_fill(env_cpu(env), ptr, ptr_size, ptr_access,
ptr_mmu_idx, false, ra);
--
2.25.1
next prev parent reply other threads:[~2021-04-02 5:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-02 5:37 [PATCH 0/2] target/arm: Fix unaligned mte checks Richard Henderson
2021-04-02 5:37 ` Richard Henderson [this message]
2021-04-02 5:37 ` [PATCH 2/2] " Richard Henderson
2021-04-02 15:43 ` Richard Henderson
2021-04-02 18:35 ` Peter Maydell
2021-04-02 18:44 ` Richard Henderson
2021-04-02 5:45 ` [PATCH 0/2] " no-reply
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