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3222 svoboda 1
/*
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 * Copyright (c) 2008 Jiri Svoboda
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup fs
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 * @{
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 */
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/** @file
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 * @brief Program Control Block interface.
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 */
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#ifndef LIBC_PCB_H_
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#define LIBC_PCB_H_
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#include <sys/types.h>
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typedef void (*entry_point_t)(void);
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/** Program Control Block.
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 *
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 * Holds pointers to data passed from the program loader to the program
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 * and/or to the dynamic linker. This includes the program entry point,
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 * arguments, environment variables etc.
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 */
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typedef struct {
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    /** Program entry point. */
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    entry_point_t entry;
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    /** Number of command-line arguments. */
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    int argc;
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    /** Command-line arguments. */
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    char **argv;
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    /*
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     * ELF-specific data.
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     */
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    /** Pointer to ELF dynamic section of the program. */
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    void *dynamic;
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} pcb_t;
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/**
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 * A pointer to the program control block. Having received the PCB pointer,
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 * the C library startup code stores it here for later use.
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 */
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extern pcb_t *__pcb;
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#endif
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/**
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 * @}
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 */