Revert 98909 - Use chain-loading for Linux nacl_helper

chrome/nacl/nacl_helper_bootstrap_munge_phdr.c

Index: chrome/nacl/nacl_helper_bootstrap_munge_phdr.c
===================================================================
--- chrome/nacl/nacl_helper_bootstrap_munge_phdr.c	(revision 98909)
+++ chrome/nacl/nacl_helper_bootstrap_munge_phdr.c	(working copy)
@@ -1,66 +0,0 @@
-/* Copyright (c) 2011 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.
- *
- * This is a trivial program to edit an ELF file in place, making
- * one crucial modification to a program header.  It's invoked:
- *      bootstrap_phdr_hacker FILENAME SEGMENT_NUMBER
- * where SEGMENT_NUMBER is the zero-origin index of the program header
- * we'll touch.  This is a PT_LOAD with p_filesz of zero.  We change its
- * p_filesz to match its p_memsz value.
- */
-
-#include <errno.h>
-#include <error.h>
-#include <fcntl.h>
-#include <gelf.h>
-#include <libelf.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-int main(int argc, char **argv) {
-  if (argc != 3)
-    error(1, 0, "Usage: %s FILENAME SEGMENT_NUMBER", argv[0]);
-
-  const char *const file = argv[1];
-  const int segment = atoi(argv[2]);
-
-  int fd = open(file, O_RDWR);
-  if (fd < 0)
-    error(2, errno, "Cannot open %s for read/write", file);
-
-  if (elf_version(EV_CURRENT) == EV_NONE)
-    error(2, 0, "elf_version: %s", elf_errmsg(-1));
-
-  Elf *elf = elf_begin(fd, ELF_C_RDWR, NULL);
-  if (elf == NULL)
-    error(2, 0, "elf_begin: %s", elf_errmsg(-1));
-
-  if (elf_flagelf(elf, ELF_C_SET, ELF_F_LAYOUT) == 0)
-    error(2, 0, "elf_flagelf: %s", elf_errmsg(-1));
-
-  GElf_Phdr phdr;
-  GElf_Phdr *ph = gelf_getphdr(elf, segment, &phdr);
-  if (ph == NULL)
-    error(2, 0, "gelf_getphdr: %s", elf_errmsg(-1));
-
-  if (ph->p_type != PT_LOAD)
-    error(3, 0, "Program header %d is %u, not PT_LOAD",
-          segment, (unsigned int) ph->p_type);
-  if (ph->p_filesz != 0)
-    error(3, 0, "Program header %d has nonzero p_filesz", segment);
-
-  ph->p_filesz = ph->p_memsz;
-  if (gelf_update_phdr(elf, segment, ph) == 0)
-    error(2, 0, "gelf_update_phdr: %s", elf_errmsg(-1));
-
-  if (elf_flagphdr(elf, ELF_C_SET, ELF_F_DIRTY) == 0)
-    error(2, 0, "elf_flagphdr: %s", elf_errmsg(-1));
-
-  if (elf_update(elf, ELF_C_WRITE) < 0)
-    error(2, 0, "elf_update: %s", elf_errmsg(-1));
-
-  close(fd);
-
-  return 0;
-}