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tcg: Enforce single page access in probe_write() 

Let's enforce the interface restriction.

Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20190826075112.25637-5-david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
David Hildenbrand 2019-08-26 09:51:09 +02:00 committed by Richard Henderson
parent 59e96ac6cb
commit ca86cf328c
2 changed files with 4 additions and 0 deletions
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2
accel/tcg/cputlb.c
View File

@ -1088,6 +1088,8 @@ void probe_write(CPUArchState *env, target_ulong addr, int size, int mmu_idx,
CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
target_ulong tlb_addr = tlb_addr_write(entry);
g_assert(-(addr | TARGET_PAGE_MASK) >= size);
if (unlikely(!tlb_hit(tlb_addr, addr))) {
if (!VICTIM_TLB_HIT(addr_write, addr)) {
tlb_fill(env_cpu(env), addr, size, MMU_DATA_STORE,

2
accel/tcg/user-exec.c
View File

@ -191,6 +191,8 @@ static inline int handle_cpu_signal(uintptr_t pc, siginfo_t *info,
void probe_write(CPUArchState *env, target_ulong addr, int size, int mmu_idx,
uintptr_t retaddr)
{
g_assert(-(addr | TARGET_PAGE_MASK) >= size);
if (!guest_addr_valid(addr) ||
page_check_range(addr, size, PAGE_WRITE) < 0) {
CPUState *cpu = env_cpu(env);