diff options
| -rw-r--r-- | accel/tcg/translate-all.c | 26 | ||||
| -rw-r--r-- | include/exec/cpu-all.h | 1 | ||||
| -rw-r--r-- | linux-user/mmap.c | 3 |
3 files changed, 30 insertions, 0 deletions
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index ef62a19..b83161a 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -2314,6 +2314,32 @@ void page_set_flags(target_ulong start, target_ulong end, int flags) } } +void page_reset_target_data(target_ulong start, target_ulong end) +{ + target_ulong addr, len; + + /* + * This function should never be called with addresses outside the + * guest address space. If this assert fires, it probably indicates + * a missing call to h2g_valid. + */ + assert(end - 1 <= GUEST_ADDR_MAX); + assert(start < end); + assert_memory_lock(); + + start = start & TARGET_PAGE_MASK; + end = TARGET_PAGE_ALIGN(end); + + for (addr = start, len = end - start; + len != 0; + len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { + PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1); + + g_free(p->target_data); + p->target_data = NULL; + } +} + void *page_get_target_data(target_ulong address) { PageDesc *p = page_find(address >> TARGET_PAGE_BITS); diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index f5bda2c..491629b 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -271,6 +271,7 @@ int walk_memory_regions(void *, walk_memory_regions_fn); int page_get_flags(target_ulong address); void page_set_flags(target_ulong start, target_ulong end, int flags); +void page_reset_target_data(target_ulong start, target_ulong end); int page_check_range(target_ulong start, target_ulong len, int flags); /** diff --git a/linux-user/mmap.c b/linux-user/mmap.c index edceaca..048c413 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -894,6 +894,9 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice) if (advice == MADV_DONTNEED && can_passthrough_madv_dontneed(start, end)) { ret = get_errno(madvise(g2h_untagged(start), len, MADV_DONTNEED)); + if (ret == 0) { + page_reset_target_data(start, start + len); + } } mmap_unlock(); |