- ret = mmap(req, size, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
+ if (need_exec)
+ prot |= PROT_EXEC;
+ if (is_fixed)
+ flags |= MAP_FIXED;
+ if (size >= HUGETLB_THRESHOLD)
+ flags |= MAP_HUGETLB;
+
+ ret = mmap(req, size, prot, flags, -1, 0);
+ if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) {
+ if (!hugetlb_warned) {
+ fprintf(stderr,
+ "warning: failed to do hugetlb mmap (%p, %zu): %d\n",
+ req, size, errno);
+ hugetlb_warned = 1;
+ }
+ flags &= ~MAP_HUGETLB;
+ ret = mmap(req, size, prot, flags, -1, 0);
+ }
+ if (ret == MAP_FAILED)
+ return NULL;
+
+ if (req != NULL && ret != req)
+ fprintf(stderr,
+ "warning: mmaped to %p, requested %p\n", ret, req);
+
+ return ret;
+}
+
+void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
+{
+ void *ret;
+
+ ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE);