glibc/elf/vismain.c

/* Copyright (C) 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* Prototypes for the functions in the DSOs.  */
extern int calllocal1 (void);
extern int (*getlocal1 (void)) (void);
extern int callinmod1 (void);
extern int (*getinmod1 (void)) (void);
extern int callitcpt1 (void);
extern int (*getitcpt1 (void)) (void);
extern const char *getvarlocal1 (void);
extern const char *getvarinmod1 (void);
extern const char *getvaritcpt1 (void);
extern int calllocal2 (void);
extern int (*getlocal2 (void)) (void);
extern int callinmod2 (void);
extern int (*getinmod2 (void)) (void);
extern int callitcpt2 (void);
extern int (*getitcpt2 (void)) (void);
extern const char *getvarlocal2 (void);
extern const char *getvarinmod2 (void);
extern const char *getvaritcpt2 (void);
extern int callitcpt3 (void);
extern int (*getitcpt3 (void)) (void);
extern const char *getvaritcpt3 (void);

extern int protinmod (void);
extern int protitcpt (void);

/* Prototypes for local functions.  */
extern int protlocal (void);

const char *protvarlocal = __FILE__;
extern const char *protvarinmod;
extern const char *protvaritcpt;

int
main (void)
{
  int res = 0;
  int val;

  /* First test: check whether .protected is handled correctly by the
     assembler/linker.  The uses of `protlocal' in the DSOs and in the
     main program should all be resolved with the local definitions.  */
  val = protlocal () + calllocal1 () + calllocal2 ();
  if (val != 0x155)
    {
      puts ("\
The handling of `.protected' seems to be implemented incorrectly: giving up");
      abort ();
    }
  puts ("`.protected' seems to be handled correctly, good!");

  /* Function pointers: for functions which are marked local and for
     which definitions are available all function pointers must be
     distinct.  */
  if (protlocal == getlocal1 ())
    {
      puts ("`protlocal' in main and mod1 have same address");
      res = 1;
    }
  if (protlocal == getlocal2 ())
    {
      puts ("`protlocal' in main and mod2 have same address");
      res = 1;
    }
  if (getlocal1 () == getlocal2 ())
    {
      puts ("`protlocal' in mod1 and mod2 have same address");
      res = 1;
    }
  if (getlocal1 () () + getlocal2 () () != 0x44)
    {
      puts ("pointers to `protlocal' in mod1 or mod2 incorrect");
      res = 1;
    }

  /* Next test.  This is similar to the last one but the function we
     are calling is not defined in the main object.  This means that
     the invocation in the main object uses the definition in the
     first DSO.  */
  if (protinmod != getinmod1 ())
    {
      puts ("`protinmod' in main and mod1 don't have same address");
      res = 1;
    }
  if (protinmod == getinmod2 ())
    {
      puts ("`protinmod' in main and mod2 have same address");
      res = 1;
    }
  if (getinmod1 () == getinmod2 ())
    {
      puts ("`protinmod' in mod1 and mod2 have same address");
      res = 1;
    }
  if (protinmod () + getinmod1 () () + getinmod2 () () != 0x4800)
    {
      puts ("pointers to `protinmod' in mod1 or mod2 incorrect");
      res = 1;
    }
  val = protinmod () + callinmod1 () + callinmod2 ();
  if (val != 0x15800)
    {
      printf ("calling of `protinmod' leads to wrong result (%#x)\n", val);
      res = 1;
    }

  /* A very similar text.  Same setup for the main object and the modules
     but this time we have another definition in a preloaded module. This
     one intercepts the references from the main object.  */
  if (protitcpt != getitcpt3 ())
    {
      puts ("`protitcpt' in main and mod3 don't have same address");
      res = 1;
    }
  if (protitcpt == getitcpt1 ())
    {
      puts ("`protitcpt' in main and mod1 have same address");
      res = 1;
    }
  if (protitcpt == getitcpt2 ())
    {
      puts ("`protitcpt' in main and mod2 have same address");
      res = 1;
    }
  if (getitcpt1 () == getitcpt2 ())
    {
      puts ("`protitcpt' in mod1 and mod2 have same address");
      res = 1;
    }
  val = protitcpt () + getitcpt1 () () + getitcpt2 () () + getitcpt3 () ();
  if (val != 0x8440000)
    {
      printf ("\
pointers to `protitcpt' in mod1 or mod2 or mod3 incorrect (%#x)\n", val);
      res = 1;
    }
  val = protitcpt () + callitcpt1 () + callitcpt2 () + callitcpt3 ();
  if (val != 0x19540000)
    {
      printf ("calling of `protitcpt' leads to wrong result (%#x)\n", val);
      res = 1;
    }

  /* Now look at variables.  First a variable which is available
     everywhere.  We must have three different addresses.  */
  if (protvarlocal == getvarlocal1 ())
    {
      puts ("`protvarlocal' in main and mod1 have same address");
      res = 1;
    }
  if (protvarlocal == getvarlocal2 ())
    {
      puts ("`protvarlocal' in main and mod2 have same address");
      res = 1;
    }
  if (getvarlocal1 () == getvarlocal2 ())
    {
      puts ("`protvarlocal' in mod1 and mod2 have same address");
      res = 1;
    }
  if (strcmp (protvarlocal, __FILE__) != 0)
    {
      puts ("`protvarlocal in main has wrong value");
      res = 1;
    }
  if (strcmp (getvarlocal1 (), "vismod1.c") != 0)
    {
      puts ("`getvarlocal1' returns wrong value");
      res = 1;
    }
  if (strcmp (getvarlocal2 (), "vismod2.c") != 0)
    {
      puts ("`getvarlocal2' returns wrong value");
      res = 1;
    }

  /* Now the case where there is no local definition.  */
  if (protvarinmod != getvarinmod1 ())
    {
      puts ("`protvarinmod' in main and mod1 have not same address");
      res = 1;
    }
  if (protvarinmod == getvarinmod2 ())
    {
      puts ("`protvarinmod' in main and mod2 have same address");
      res = 1;
    }
  if (strcmp (getvarinmod1 (), "vismod1.c") != 0)
    {
      puts ("`getvarinmod1' returns wrong value");
      res = 1;
    }
  if (strcmp (getvarinmod2 (), "vismod2.c") != 0)
    {
      puts ("`getvarinmod2' returns wrong value");
      res = 1;
    }

  /* And a test where a variable definition is intercepted.  */
  if (protvaritcpt == getvaritcpt1 ())
    {
      puts ("`protvaritcpt' in main and mod1 have same address");
      res = 1;
    }
  if (protvaritcpt == getvaritcpt2 ())
    {
      puts ("`protvaritcpt' in main and mod2 have same address");
      res = 1;
    }
  if (protvaritcpt != getvaritcpt3 ())
    {
      puts ("`protvaritcpt' in main and mod3 have not same address");
      res = 1;
    }
  if (getvaritcpt1 () == getvaritcpt2 ())
    {
      puts ("`protvaritcpt' in mod1 and mod2 have same address");
      res = 1;
    }
  if (strcmp (protvaritcpt, "vismod3.c") != 0)
    {
      puts ("`protvaritcpt in main has wrong value");
      res = 1;
    }
  if (strcmp (getvaritcpt1 (), "vismod1.c") != 0)
    {
      puts ("`getvaritcpt1' returns wrong value");
      res = 1;
    }
  if (strcmp (getvaritcpt2 (), "vismod2.c") != 0)
    {
      puts ("`getvaritcpt2' returns wrong value");
      res = 1;
    }

  return res;
}


int
protlocal (void)
{
  return 0x1;
}