/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup rtems_rtld
*
* @brief RTEMS Run-Time Link Editor Dynamic Loading API Shell Support.
*
* Shell command wrappers for the Dynamic Loading API.
*/
/*
* COPYRIGHT (c) 2012, 2018 Chris Johns <chrisj@rtems.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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include <rtems/rtl/dlfcn-shell.h>
static void*
convert_ascii_to_voidp (const char* arg)
{
if (strcmp (arg, "base") == 0)
return RTLD_DEFAULT;
return (void*) strtoul (arg, NULL, 16);
}
int
shell_dlopen (int argc, char* argv[])
{
int arg;
for (arg = 1; arg < argc; arg++)
{
void* handle = dlopen (argv[arg], RTLD_NOW | RTLD_GLOBAL);
if (handle)
{
int unresolved;
char* message = "loaded";
if (dlinfo (handle, RTLD_DI_UNRESOLVED, &unresolved) < 0)
message = "dlinfo error checking unresolved status";
else if (unresolved)
message = "has unresolved externals";
printf ("handle: %p %s\n", handle, message);
}
else
printf ("error: %s\n", dlerror ());
}
return 0;
}
int
shell_dlclose (int argc, char* argv[])
{
return 0;
}
static bool
lookup_dlsym (void** value, int argc, char* argv[])
{
if (argc >= 3)
{
void* handle = convert_ascii_to_voidp (argv[1]);
if (handle)
{
*value = dlsym (handle, argv[2]);
if (*value)
return true;
else
printf ("error: invalid handle or symbol\n");
}
else
printf ("error: invalid handle");
}
else
printf ("error: requires handle and symbol name\n");
return false;
}
int
shell_dlsym (int argc, char* argv[])
{
void* value;
if (lookup_dlsym (&value, argc, argv))
{
printf ("%s = %p\n", argv[2], value);
return 0;
}
return -1;
}
typedef int (*call_p)(int argc, char* argv[]);
int
shell_dlcall (int argc, char* argv[])
{
void* value;
if (lookup_dlsym (&value, argc, argv))
{
call_p call = value;
int r;
printf ("(*%p)(%d, ....)\n", value, argc - 3);
r = call (argc - 3, argv + 3);
printf ("return %d\n", r);
return 0;
}
return -1;
}
