gold/testsuite/script_test_2.cc

   1 // script_test_2.cc -- linker script test 2 for gold  -*- C++ -*-
   2
   3 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 // A test of some uses of the SECTIONS clause.  Look at
  24 // script_test_2.t to make sense of this test.
  25
  26 #include <cassert>
  27 #include <cstddef>
  28 #include <cstring>
  29 #include <stdint.h>
  30
  31 extern char start_test_area[];
  32 extern char start_test_area_1[];
  33 extern char start_data[];
  34 extern char end_data[];
  35 extern char start_fill[];
  36 extern char end_fill[];
  37 extern char end_test_area[];
  38 extern char test_addr[];
  39 extern char test_addr_alias[];
  40
  41 int
  42 main(int, char**)
  43 {
  44   assert(reinterpret_cast<uintptr_t>(start_test_area) == 0x20000001);
  45   assert(reinterpret_cast<uintptr_t>(start_test_area_1) == 0x20000010);
  46
  47   // We should see the string from script_test_2b.o next.  The
  48   // subalign should move it up to 0x20000020.
  49   for (int i = 0; i < 16; ++i)
  50     assert(start_test_area_1[i] == 0);
  51   assert(strcmp(start_test_area_1 + 16, "test bb") == 0);
  52
  53   // Next the string from script_test_2a.o, after the subalign.
  54   for (int i = 16 + 7; i < 48; ++i)
  55     assert(start_test_area_1[i] == 0);
  56   assert(strcmp(start_test_area_1 + 48, "test aa") == 0);
  57
  58   // Move four bytes forward to start_data.
  59   assert(reinterpret_cast<uintptr_t>(start_test_area_1 + 48 + 8 + 4)
  60          == reinterpret_cast<uintptr_t>(start_data));
  61   assert(memcmp(start_data, "\1\2\0\4\0\0\0\010\0\0\0\0\0\0\0", 15) == 0
  62          || memcmp(start_data, "\1\0\2\0\0\0\4\0\0\0\0\0\0\0\010", 15) == 0);
  63   assert(end_data == start_data + 15);
  64
  65   // Check that FILL works as expected.
  66   assert(start_fill == end_data);
  67   assert(memcmp(start_fill, "\x12\x34\x56\x78\x12\x34\x56\0", 8) == 0);
  68   assert(end_fill == start_fill + 8);
  69
  70   assert(end_test_area == end_fill);
  71
  72   assert(test_addr == start_test_area_1);
  73   assert(test_addr_alias == test_addr);
  74 }