1 | /* |
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2 | * COPYRIGHT (c) 2012, 2018 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.org/license/LICENSE. |
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7 | */ |
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8 | /** |
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9 | * @file |
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10 | * |
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11 | * @ingroup rtems_rtld |
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12 | * |
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13 | * @brief RTEMS Run-Time Link Editor Dynamic Loading API Shell Support. |
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14 | * |
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15 | * Shell command wrappers for the Dynamic Loading API. |
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16 | */ |
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17 | |
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18 | #if HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <stdbool.h> |
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23 | #include <stdio.h> |
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24 | #include <stdlib.h> |
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25 | #include <string.h> |
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26 | |
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27 | #include <dlfcn.h> |
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28 | #include <rtems/rtl/dlfcn-shell.h> |
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29 | |
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30 | static void* |
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31 | convert_ascii_to_voidp (const char* arg) |
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32 | { |
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33 | if (strcmp (arg, "base") == 0) |
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34 | return RTLD_DEFAULT; |
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35 | return (void*) strtoul (arg, NULL, 16); |
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36 | } |
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37 | |
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38 | int |
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39 | shell_dlopen (int argc, char* argv[]) |
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40 | { |
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41 | int arg; |
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42 | for (arg = 1; arg < argc; arg++) |
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43 | { |
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44 | void* handle = dlopen (argv[arg], RTLD_NOW | RTLD_GLOBAL); |
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45 | if (handle) |
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46 | { |
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47 | int unresolved; |
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48 | char* message = "loaded"; |
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49 | if (dlinfo (handle, RTLD_DI_UNRESOLVED, &unresolved) < 0) |
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50 | message = "dlinfo error checking unresolved status"; |
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51 | else if (unresolved) |
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52 | message = "has unresolved externals"; |
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53 | printf ("handle: %p %s\n", handle, message); |
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54 | } |
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55 | else |
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56 | printf ("error: %s\n", dlerror ()); |
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57 | } |
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58 | return 0; |
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59 | } |
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60 | |
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61 | int |
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62 | shell_dlclose (int argc, char* argv[]) |
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63 | { |
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64 | return 0; |
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65 | } |
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66 | |
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67 | static bool |
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68 | lookup_dlsym (void** value, int argc, char* argv[]) |
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69 | { |
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70 | if (argc >= 3) |
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71 | { |
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72 | void* handle = convert_ascii_to_voidp (argv[1]); |
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73 | if (handle) |
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74 | { |
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75 | *value = dlsym (handle, argv[2]); |
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76 | if (*value) |
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77 | return true; |
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78 | else |
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79 | printf ("error: invalid handle or symbol\n"); |
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80 | } |
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81 | else |
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82 | printf ("error: invalid handle"); |
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83 | } |
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84 | else |
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85 | printf ("error: requires handle and symbol name\n"); |
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86 | return false; |
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87 | } |
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88 | |
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89 | int |
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90 | shell_dlsym (int argc, char* argv[]) |
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91 | { |
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92 | void* value; |
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93 | if (lookup_dlsym (&value, argc, argv)) |
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94 | { |
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95 | printf ("%s = %p\n", argv[2], value); |
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96 | return 0; |
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97 | } |
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98 | return -1; |
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99 | } |
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100 | |
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101 | typedef int (*call_p)(int argc, char* argv[]); |
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102 | |
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103 | int |
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104 | shell_dlcall (int argc, char* argv[]) |
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105 | { |
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106 | void* value; |
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107 | if (lookup_dlsym (&value, argc, argv)) |
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108 | { |
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109 | call_p call = value; |
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110 | int r; |
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111 | printf ("(*%p)(%d, ....)\n", value, argc - 3); |
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112 | r = call (argc - 3, argv + 3); |
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113 | printf ("return %d\n", r); |
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114 | return 0; |
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115 | } |
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116 | return -1; |
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117 | } |
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