diff options
| -rw-r--r-- | util/oslib-posix.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/util/oslib-posix.c b/util/oslib-posix.c index 3ae4987b6b..27972d4add 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -129,9 +129,9 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment) { size_t align = QEMU_VMALLOC_ALIGN; size_t total = size + align - getpagesize(); - void *ptr = mmap(0, total, PROT_READ | PROT_WRITE, - MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + void *ptr = mmap(0, total, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr; + void *ptr1; if (ptr == MAP_FAILED) { return NULL; @@ -140,6 +140,14 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment) if (alignment) { *alignment = align; } + + ptr1 = mmap(ptr + offset, size, PROT_READ | PROT_WRITE, + MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + if (ptr1 == MAP_FAILED) { + munmap(ptr, total); + return NULL; + } + ptr += offset; total -= offset; |