c3-lang/libbsd/test/nlist.c

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• Hash : 61d378f5
  Author :
  Date : 2019-02-03T00:11:15
  

  Re-allow direct use of nlist.n_name in <nlist.h>
  
  Commit e8d340de ("Remove a.out support from nlist()") introduced a copy
  of the definition of nlist from a.out.h. However, as well as having
  n_name inside n_un, on the various BSDs n_name could also be accessed
  as a direct member of nlist, and this is made use of by FreeBSD's
  usr.bin/netstat/main.c. Thus we should also add the same enclosing
  anonymous union.
  
  [guillem@hadrons.org:
   - Add a minimal unit test. ]
  
  Closes: !4
  Signed-off-by: Guillem Jover <guillem@hadrons.org>
  

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• test/nlist.c

• /*
   * Copyright © 2017 Guillem Jover <guillem@hadrons.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
   * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/types.h>
  #include <sys/stat.h>
  
  #include <stddef.h>
  #include <stdio.h>
  #include <assert.h>
  #include <fcntl.h>
  #include <nlist.h>
  
  static int data_prv_init = 50;
  extern int data_pub_init;
  extern int data_pub_uninit[2048];
  extern int *data_pub_ptr;
  
  int *data_pub_ptr = &data_prv_init;
  int data_pub_init = 10;
  int data_pub_uninit[2048];
  
  extern int
  func_pub(void);
  
  int
  func_pub(void)
  {
  	return 42;
  }
  
  int
  main(int argc, char **argv)
  {
  	struct nlist nl[] = {
  		{ .n_un.n_name = "main" },
  		{ .n_un.n_name = "func_pub" },
  		{ .n_un.n_name = "data_pub_uninit" },
  		{ .n_un.n_name = "data_pub_init" },
  		{ .n_un.n_name = "data_prv_init" },
  		{ .n_un.n_name = NULL },
  	};
  	int rc;
  
  	assert(*data_pub_ptr == 50);
  
  	assert(nl[0].n_name == nl[0].n_un.n_name);
  
  	rc = nlist(argv[0], nl);
  	assert(rc == 0);
  
  #if defined(__powerpc64__) && _CALL_ELF == 1
  	/* On PowerPC 64-bit ELFv1, the functions are stored in
  	 * the .text sections but they are accessed through a function
  	 * descriptor stored in a data section, for example for PowerPC
  	 * 64-bit that section is called .opd. */
  	assert(nl[0].n_type == (N_DATA | N_EXT));
  	assert(nl[1].n_type == (N_DATA | N_EXT));
  #else
  	assert(nl[0].n_type == (N_TEXT | N_EXT));
  	assert(nl[1].n_type == (N_TEXT | N_EXT));
  #endif
  	assert(nl[2].n_type == (N_BSS | N_EXT));
  	assert(nl[3].n_type == (N_DATA | N_EXT));
  	assert(nl[4].n_type == (N_DATA));
  
  	return 0;
  }
  

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