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  1. /*
  2.  * Copyright (c) 2008 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup fs
  30.  * @{
  31.  */
  32. /** @file
  33.  * @brief Program Control Block interface.
  34.  */
  35.  
  36. #ifndef LIBC_PCB_H_
  37. #define LIBC_PCB_H_
  38.  
  39. #include <sys/types.h>
  40.  
  41. typedef void (*entry_point_t)(void);
  42.  
  43. /**
  44.  * Holds pointers to data passed from the program loader to the program
  45.  * and/or to the dynamic linker. This includes the program entry point,
  46.  * arguments, environment variables etc.
  47.  */
  48. typedef struct {
  49.     /** Program entry point */
  50.     entry_point_t entry;
  51.  
  52.     /** Number of command-line arguments */
  53.     int argc;
  54.     /** Command-line arguments */
  55.     char **argv;
  56.  
  57.     /*
  58.      * ELF-specific data
  59.      */
  60.     /** Pointer to ELF dynamic section of the program */
  61.     void *dynamic;
  62.     /** Pointer to dynamic section of the runtime linker */
  63.     void *rtld_dynamic;
  64.     /** Runtime-linker load bias */
  65.     uintptr_t rtld_bias;
  66. } pcb_t;
  67.  
  68. extern pcb_t *__pcb;
  69.  
  70. #endif
  71.  
  72. /**
  73.  * @}
  74.  */
  75.