| 1 | /*
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| 2 | * Copyright (c) 2008 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libc
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * @brief Program Control Block interface.
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| 34 | */
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| 35 |
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| 36 | #ifndef LIBC_PCB_H_
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| 37 | #define LIBC_PCB_H_
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| 38 |
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| 39 | #include <tls.h>
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| 40 |
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| 41 | typedef void (*entry_point_t)(void);
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| 42 |
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| 43 | struct pcb_inbox_entry {
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| 44 | char *name;
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| 45 | int file;
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| 46 | };
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| 47 |
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| 48 | /** Program Control Block.
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| 49 | *
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| 50 | * Holds pointers to data passed from the program loader to the program
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| 51 | * and/or to the dynamic linker. This includes the program entry point,
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| 52 | * arguments, environment variables etc.
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| 53 | *
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| 54 | */
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| 55 | typedef struct {
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| 56 | /** Program entry point. */
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| 57 | entry_point_t entry;
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| 58 |
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| 59 | /** Current working directory. */
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| 60 | char *cwd;
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| 61 |
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| 62 | /** Number of command-line arguments. */
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| 63 | int argc;
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| 64 | /** Command-line arguments. */
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| 65 | char **argv;
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| 66 |
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| 67 | /** List of inbox files. */
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| 68 | struct pcb_inbox_entry *inbox;
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| 69 | int inbox_entries;
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| 70 |
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| 71 | /*
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| 72 | * ELF-specific data.
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| 73 | */
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| 74 |
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| 75 | /** Pointer to ELF dynamic section of the program. */
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| 76 | void *dynamic;
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| 77 | /** Pointer to dynamic linker state structure (rtld_t). */
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| 78 | void *rtld_runtime;
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| 79 |
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| 80 | /** Thread local storage for the main thread. */
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| 81 | tcb_t *tcb;
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| 82 | } pcb_t;
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| 83 |
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| 84 | /**
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| 85 | * A pointer to the program control block. Having received the PCB pointer,
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| 86 | * the C library startup code stores it here for later use.
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| 87 | */
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| 88 | extern pcb_t *__pcb;
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| 89 |
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| 90 | #endif
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| 91 |
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| 92 | /**
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| 93 | * @}
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| 94 | */
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