From 9aea1ea31af25fe344a88da086ff913cca09c667 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 25 Jan 2018 11:45:28 +0000 Subject: [PATCH] target/arm: Fix 32-bit address truncation Commit ("3b39d734141a target/arm: Handle page table walk load failures correctly") modified both versions of the page table walking code (i.e., arm_ldl_ptw and arm_ldq_ptw) to record the result of the translation in a temporary 'data' variable so that it can be inspected before being returned. However, arm_ldq_ptw() returns an uint64_t, and using a temporary uint32_t variable truncates the upper bits, corrupting the result. This causes problems when using more than 4 GB of memory in a TCG guest. So use a uint64_t instead. Signed-off-by: Ard Biesheuvel Message-id: 20180119194648.25501-1-ard.biesheuvel@linaro.org Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- target/arm/helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/arm/helper.c b/target/arm/helper.c index c83c901a86..bd05f8acb8 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -8360,7 +8360,7 @@ static uint64_t arm_ldq_ptw(CPUState *cs, hwaddr addr, bool is_secure, MemTxAttrs attrs = {}; MemTxResult result = MEMTX_OK; AddressSpace *as; - uint32_t data; + uint64_t data; attrs.secure = is_secure; as = arm_addressspace(cs, attrs);