107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/* Copyright (C) 2004-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David Mosberger <davidm@hpl.hp.com>, 2004.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <link.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#define SET 0
|
|
#define ADD 1
|
|
#define REMOVE 2
|
|
|
|
#define leq(l,r) (((r) - (l)) <= ~0ULL / 2)
|
|
|
|
static int
|
|
callback (struct dl_phdr_info *info, size_t size, void *ptr)
|
|
{
|
|
static int last_adds = 0, last_subs = 0;
|
|
intptr_t cmd = (intptr_t) ptr;
|
|
|
|
printf (" size = %Zu\n", size);
|
|
if (size < (offsetof (struct dl_phdr_info, dlpi_subs)
|
|
+ sizeof (info->dlpi_subs)))
|
|
{
|
|
fprintf (stderr, "dl_iterate_phdr failed to pass dlpi_adds/dlpi_subs\n");
|
|
exit (5);
|
|
}
|
|
|
|
printf (" dlpi_adds = %Lu dlpi_subs = %Lu\n",
|
|
info->dlpi_adds, info->dlpi_subs);
|
|
|
|
switch (cmd)
|
|
{
|
|
case SET:
|
|
break;
|
|
|
|
case ADD:
|
|
if (leq (info->dlpi_adds, last_adds))
|
|
{
|
|
fprintf (stderr, "dlpi_adds failed to get incremented!\n");
|
|
exit (3);
|
|
}
|
|
break;
|
|
|
|
case REMOVE:
|
|
if (leq (info->dlpi_subs, last_subs))
|
|
{
|
|
fprintf (stderr, "dlpi_subs failed to get incremented!\n");
|
|
exit (4);
|
|
}
|
|
break;
|
|
}
|
|
last_adds = info->dlpi_adds;
|
|
last_subs = info->dlpi_subs;
|
|
return -1;
|
|
}
|
|
|
|
static void *
|
|
load (const char *path)
|
|
{
|
|
void *handle;
|
|
|
|
printf ("loading `%s'\n", path);
|
|
handle = dlopen (path, RTLD_LAZY);
|
|
if (!handle)
|
|
exit (1);
|
|
dl_iterate_phdr (callback, (void *)(intptr_t) ADD);
|
|
return handle;
|
|
}
|
|
|
|
static void
|
|
unload (const char *path, void *handle)
|
|
{
|
|
printf ("unloading `%s'\n", path);
|
|
if (dlclose (handle) < 0)
|
|
exit (2);
|
|
dl_iterate_phdr (callback, (void *)(intptr_t) REMOVE);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
void *handle1, *handle2;
|
|
|
|
dl_iterate_phdr (callback, (void *)(intptr_t) SET);
|
|
handle1 = load ("firstobj.so");
|
|
handle2 = load ("globalmod1.so");
|
|
unload ("firstobj.so", handle1);
|
|
unload ("globalmod1.so", handle2);
|
|
return 0;
|
|
}
|