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