1  /* script_test_12a.c -- a test case for gold
       2  
       3     Copyright (C) 2015-2023 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 };