gold/testsuite/script_test_12a.c

   1 /* script_test_12a.c -- a test case for gold
   2
   3    Copyright (C) 2015-2019 Free Software Foundation, Inc.
   4    Written by Cary Coutant <ccoutant@gmail.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    This tests linker script behavior, that gold distinguishes correctly
  24    between
  25       *(.x1) *(.x2) *(.x3)
  26    and
  27       *(.x1 .x2 .x3)
  28    in an input section spec. In the first case, the output section
  29    should contain all .x1 sections, followed by all .x2 sections,
  30    then all .x3 sections; i.e.:
  31       script_test_12a.o(.x1)
  32       script_test_12b.o(.x1)
  33       script_test_12a.o(.x2)
  34       script_test_12b.o(.x2)
  35       script_test_12a.o(.x3)
  36       script_test_12b.o(.x3)
  37
  38    In the second case, the output section should interleave the
  39    .x1, .x2, and .x3 sections in the order seen; i.e.:
  40       script_test_12a.o(.x1)
  41       script_test_12a.o(.x2)
  42       script_test_12a.o(.x3)
  43       script_test_12b.o(.x1)
  44       script_test_12b.o(.x2)
  45       script_test_12b.o(.x3)
  46
  47    The linker scripts set the absolute symbol INTERLEAVED, which we
  48    test here to determine which ordering to expect. The scripts also
  49    define the symbols test_array_start and test_array_end.
  50 */
  51
  52 extern int test_array_start;
  53 extern int test_array_end;
  54 extern char interleaved __attribute__((__aligned__(1)));
  55
  56 int
  57 main(void)
  58 {
  59   int last = 0;
  60   int *p;
  61   long should_be_interleaved = (long)&interleaved;
  62   int mask = (should_be_interleaved == 1 ? 0x7f : 0xff);
  63   for (p = &test_array_start; p < &test_array_end; ++p)
  64     {
  65       int next = *p & mask;
  66       if (next <= last)
  67         return 1;
  68       last = next;
  69     }
  70   return 0;
  71 }
  72
  73 int a1[] __attribute((section(".x1"))) = { 0x01, 0x02, 0x03, 0x04 };
  74 int a2[] __attribute((section(".x2"))) = { 0x11, 0x12, 0x13, 0x14};
  75 int a3[] __attribute((section(".x3"))) = { 0x21, 0x22, 0x23, 0x24 };
  76 int a4[] __attribute((section(".x4"))) = { 0xff, 0xff, 0xff, 0xff };