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1 /* ================================================================= |
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2 * |
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3 * loader_fs.c |
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4 * |
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5 * Routines to read a library from a file system. |
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6 * |
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7 * ================================================================= |
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8 * ####ECOSGPLCOPYRIGHTBEGIN#### |
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9 * ------------------------------------------- |
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10 * This file is part of eCos, the Embedded Configurable Operating |
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11 * System. |
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12 * Copyright (C) 2005 eCosCentric Ltd. |
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13 * |
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14 * eCos is free software; you can redistribute it and/or modify it |
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15 * under the terms of the GNU General Public License as published by |
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16 * the Free Software Foundation; either version 2 or (at your option) |
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17 * any later version. |
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18 * |
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19 * eCos is distributed in the hope that it will be useful, but |
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20 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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22 * General Public License for more details. |
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23 * |
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24 * You should have received a copy of the GNU General Public License |
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25 * along with eCos; if not, write to the Free Software Foundation, |
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26 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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27 * |
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28 * As a special exception, if other files instantiate templates or |
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29 * use macros or inline functions from this file, or you compile this |
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30 * file and link it with other works to produce a work based on this |
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31 * file, this file does not by itself cause the resulting work to be |
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32 * covered by the GNU General Public License. However the source code |
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33 * for this file must still be made available in accordance with |
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34 * section (3) of the GNU General Public License. |
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35 * |
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36 * This exception does not invalidate any other reasons why a work |
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37 * based on this file might be covered by the GNU General Public |
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38 * License. |
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39 * |
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40 * ------------------------------------------- |
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41 * ####ECOSGPLCOPYRIGHTEND#### |
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42 * ================================================================= |
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43 * #####DESCRIPTIONBEGIN#### |
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44 * |
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45 * Author(s): atonizzo@lycos.com |
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46 * Contributors: nickg@ecoscentric.com |
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47 * Date: 2005-05-13 |
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48 * Purpose: |
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49 * Description: |
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50 * |
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51 * ####DESCRIPTIONEND#### |
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52 * |
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53 * ================================================================= |
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54 */ |
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55 |
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56 #include <cyg/infra/diag.h> // For diagnostic printing. |
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57 #include <pkgconf/io_fileio.h> |
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58 #include <sys/stat.h> |
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59 #include <stdlib.h> |
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60 #include <stdio.h> |
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61 #include <string.h> |
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62 |
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63 #include <pkgconf/objloader.h> |
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64 #include <cyg/objloader/elf.h> |
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65 #include <cyg/objloader/objelf.h> |
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66 #include <cyg/objloader/loader_fs.h> |
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67 |
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68 size_t |
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69 cyg_ldr_fs_read( PELF_OBJECT p, size_t s, size_t n, void *mem ) |
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70 { |
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71 return fread( mem, s, n, (FILE*)p->ptr ); |
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72 } |
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73 |
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74 cyg_int32 |
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75 cyg_ldr_fs_seek( PELF_OBJECT p, cyg_uint32 offs ) |
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76 { |
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77 return fseek( (FILE*)p->ptr, offs, SEEK_SET ); |
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78 } |
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79 |
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80 cyg_int32 |
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81 cyg_ldr_fs_close( PELF_OBJECT p ) |
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82 { |
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83 return fclose( (FILE*)p->ptr ); |
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84 } |
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85 |
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86 PELF_OBJECT |
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87 cyg_ldr_open_library_fs( cyg_uint8 *ptr ) |
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88 { |
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89 PELF_OBJECT e_obj; |
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90 FILE *fp; |
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91 |
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92 fp = fopen( ptr, "rb" ); |
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93 if ( fp == 0 ) |
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94 { |
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95 cyg_ldr_last_error = "FILE NOT FOUND"; |
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96 return (void*)0; |
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97 } |
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98 |
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99 // Create a file object to keep track of this library. |
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100 e_obj = (PELF_OBJECT)malloc( sizeof( ELF_OBJECT ) ); |
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101 CYG_ASSERT( e_obj != 0, "Cannot malloc() e_obj" ); |
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102 if ( e_obj == 0 ) |
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103 { |
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104 cyg_ldr_last_error = "ERROR IN MALLOC"; |
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105 fclose( fp ); |
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106 return (void*)0; |
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107 } |
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108 memset( e_obj, 0, sizeof( ELF_OBJECT ) ); |
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109 e_obj->ptr = (CYG_ADDRWORD)fp; |
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110 e_obj->mode = CYG_LDR_MODE_FILESYSTEM; |
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111 |
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112 // Handlers for the file system open. |
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113 e_obj->read = cyg_ldr_fs_read; |
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114 e_obj->seek = cyg_ldr_fs_seek; |
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115 e_obj->close = cyg_ldr_fs_close; |
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116 return e_obj; |
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117 } |
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118 |
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119 void |
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120 cyg_ldr_close_library_fs( PELF_OBJECT p ) |
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121 { |
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122 } |
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123 |
