diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-01-25 11:45:28 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-01-25 11:45:28 +0000 |
| commit | 9aea1ea31af25fe344a88da086ff913cca09c667 (patch) | |
| tree | e9cf04113ff4af8f7cf46bc4e176423815b02560 /target/arm/helper.c | |
| parent | 0f79bfe38a2cf0f43c7ea4959da7f8ebd7858f3d (diff) | |
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 <ard.biesheuvel@linaro.org>
Message-id: 20180119194648.25501-1-ard.biesheuvel@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/helper.c')
| -rw-r--r-- | target/arm/helper.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |