Port some of the base system to FreeBSD. Extracted from...

base/sys_info_posix.cc

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/file_util.h"
 #include "base/sys_info.h"
 #include "base/basictypes.h"
 
 #include <errno.h>
 #include <string.h>
@@ skipping 34 matching lines @@
     NOTREACHED();
     return 1;
   }
 
   return static_cast<int>(res);
 #endif
 }
 
 // static
 int64 SysInfo::AmountOfPhysicalMemory() {
-  // _SC_PHYS_PAGES is not part of POSIX and not available on OS X
+  // _SC_PHYS_PAGES is not part of POSIX and not available on OS X or
+  // FreeBSD
 #if defined(OS_MACOSX)
   struct host_basic_info hostinfo;
   mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
   int result = host_info(mach_host_self(),
                          HOST_BASIC_INFO,
                          reinterpret_cast<host_info_t>(&hostinfo),
                          &count);
   DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
   if (result != KERN_SUCCESS) {
     NOTREACHED();
     return 0;
   }
 
   return static_cast<int64>(hostinfo.max_mem);
+#elif defined(OS_FREEBSD)
+  // TODO(benl): I have no idea how to get this
+  NOTIMPLEMENTED();
+  return 0;
 #else
   long pages = sysconf(_SC_PHYS_PAGES);
   long page_size = sysconf(_SC_PAGE_SIZE);
   if (pages == -1 || page_size == -1) {
     NOTREACHED();
     return 0;
   }
 
   return static_cast<int64>(pages) * page_size;
 #endif
@@ skipping 82 matching lines @@
     file_util::ReadFileToString(FilePath("/proc/sys/kernel/shmmax"), &contents);
     limit = strtoul(contents.c_str(), NULL, 0);
     limit_valid = true;
   }
 
   return limit;
 }
 #endif
 
 }  // namespace base