- GetSystemInfo(&sysInfo);
- addr = (uintptr_t)sysInfo.lpMaximumApplicationAddress;
- return (unsigned long long)addr;
+ pagesize = sysconf(_SC_PAGESIZE);
+ pages = sysconf(_SC_PHYS_PAGES);
+ if (pages == -1 || pagesize == -1)
+ return 0;
+
+ return (unsigned long long) pages * (unsigned long long) pagesize;