Non-SFI mode: Remove old Non-SFI code.

components/nacl/loader/nonsfi/irt_memory.cc

-// Copyright 2014 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 <errno.h>
-#include <sys/mman.h>
-
-#include "base/logging.h"
-#include "components/nacl/loader/nonsfi/irt_interfaces.h"
-#include "components/nacl/loader/nonsfi/irt_util.h"
-#include "native_client/src/trusted/service_runtime/include/machine/_types.h"
-#include "native_client/src/trusted/service_runtime/include/sys/mman.h"
-
-namespace nacl {
-namespace nonsfi {
-namespace {
-
-int NaClProtToProt(int nacl_prot) {
-  int prot = 0;
-  if ((nacl_prot & NACL_ABI_PROT_MASK) == NACL_ABI_PROT_NONE)
-    return PROT_NONE;
-
-  if (nacl_prot & NACL_ABI_PROT_READ)
-    prot |= PROT_READ;
-  if (nacl_prot & NACL_ABI_PROT_WRITE)
-    prot |= PROT_WRITE;
-  if (nacl_prot & NACL_ABI_PROT_EXEC)
-    prot |= PROT_EXEC;
-  return prot;
-}
-
-int NaClFlagsToFlags(int nacl_flags) {
-  int flags = 0;
-
-  if (nacl_flags & NACL_ABI_MAP_SHARED)
-    flags |= MAP_SHARED;
-  if (nacl_flags & NACL_ABI_MAP_PRIVATE)
-    flags |= MAP_PRIVATE;
-  if (nacl_flags & NACL_ABI_MAP_FIXED)
-    flags |= MAP_FIXED;
-
-  // Note: NACL_ABI_MAP_ANON is an alias of NACL_ABI_MAP_ANONYMOUS.
-  if (nacl_flags & NACL_ABI_MAP_ANONYMOUS)
-    flags |= MAP_ANONYMOUS;
-  return flags;
-}
-
-int IrtMMap(void** addr, size_t len, int prot, int flags,
-            int fd, nacl_abi_off_t off) {
-  const int host_prot = NaClProtToProt(prot);
-  // On Chrome OS, mmap can fail if PROT_EXEC is set in |host_prot|,
-  // but mprotect will allow changing the permissions later.
-  // This is because Chrome OS mounts writable filesystems with "noexec".
-  void* result = mmap(
-      *addr, len, host_prot & ~PROT_EXEC, NaClFlagsToFlags(flags), fd, off);
-  if (result == MAP_FAILED)
-    return errno;
-  if (host_prot & PROT_EXEC) {
-    if (mprotect(result, len, host_prot) != 0) {
-      // This aborts here because it cannot easily undo the mmap() call.
-      PLOG(FATAL) << "IrtMMap: mprotect to turn on PROT_EXEC failed.";
-    }
-  }
-
-  *addr = result;
-  return 0;
-}
-
-int IrtMUnmap(void* addr, size_t len) {
-  return CheckError(munmap(addr, len));
-}
-
-int IrtMProtect(void* addr, size_t len, int prot) {
-  return CheckError(mprotect(addr, len, NaClProtToProt(prot)));
-}
-
-}  // namespace
-
-// For mmap, the argument types should be nacl_abi_off_t rather than off_t.
-// However, the definition of nacl_irt_memory uses the host type off_t, so here
-// we need to cast it.
-const nacl_irt_memory kIrtMemory = {
-  reinterpret_cast<int(*)(void**, size_t, int, int, int, off_t)>(IrtMMap),
-  IrtMUnmap,
-  IrtMProtect,
-};
-
-}  // namespace nonsfi
-}  // namespace nacl