| 1 | /* Test STT_GNU_IFUNC symbols with dlopen: |
| 2 | |
| 3 | 1. Direct function call. |
| 4 | 2. Function pointer. |
| 5 | 3. Visibility with override. |
| 6 | */ |
| 7 | |
| 8 | #include <dlfcn.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <stdio.h> |
| 11 | |
| 12 | extern int __attribute__ ((noinline)) foo (void); |
| 13 | extern int __attribute__ ((noinline)) foo_hidden (void); |
| 14 | extern int __attribute__ ((noinline)) foo_protected (void); |
| 15 | |
| 16 | typedef int (*foo_p) (void); |
| 17 | |
| 18 | int |
| 19 | __attribute__ ((noinline)) |
| 20 | foo (void) |
| 21 | { |
| 22 | return -30; |
| 23 | } |
| 24 | |
| 25 | int |
| 26 | __attribute__ ((noinline)) |
| 27 | foo_hidden (void) |
| 28 | { |
| 29 | return -20; |
| 30 | } |
| 31 | |
| 32 | int |
| 33 | __attribute__ ((noinline)) |
| 34 | foo_protected (void) |
| 35 | { |
| 36 | return -40; |
| 37 | } |
| 38 | |
| 39 | int |
| 40 | main (void) |
| 41 | { |
| 42 | foo_p p; |
| 43 | foo_p (*f) (void); |
| 44 | int *ret; |
| 45 | |
| 46 | void *h = dlopen ("ifuncmod3.so", RTLD_LAZY); |
| 47 | if (h == NULL) |
| 48 | { |
| 49 | printf ("cannot load: %s\n", dlerror ()); |
| 50 | return 1; |
| 51 | } |
| 52 | |
| 53 | p = dlsym (h, "foo"); |
| 54 | if (p == NULL) |
| 55 | { |
| 56 | printf ("symbol not found: %s\n", dlerror ()); |
| 57 | return 1; |
| 58 | } |
| 59 | if ((*p) () != -1) |
| 60 | abort (); |
| 61 | |
| 62 | f = dlsym (h, "get_foo_p"); |
| 63 | if (f == NULL) |
| 64 | { |
| 65 | printf ("symbol not found: %s\n", dlerror ()); |
| 66 | return 1; |
| 67 | } |
| 68 | |
| 69 | ret = dlsym (h, "ret_foo"); |
| 70 | if (ret == NULL) |
| 71 | { |
| 72 | printf ("symbol not found: %s\n", dlerror ()); |
| 73 | return 1; |
| 74 | } |
| 75 | |
| 76 | p = (*f) (); |
| 77 | if (p != foo) |
| 78 | abort (); |
| 79 | if (foo () != -30) |
| 80 | abort (); |
| 81 | if (*ret != -30 || (*p) () != *ret) |
| 82 | abort (); |
| 83 | |
| 84 | f = dlsym (h, "get_foo_hidden_p"); |
| 85 | if (f == NULL) |
| 86 | { |
| 87 | printf ("symbol not found: %s\n", dlerror ()); |
| 88 | return 1; |
| 89 | } |
| 90 | |
| 91 | ret = dlsym (h, "ret_foo_hidden"); |
| 92 | if (ret == NULL) |
| 93 | { |
| 94 | printf ("symbol not found: %s\n", dlerror ()); |
| 95 | return 1; |
| 96 | } |
| 97 | |
| 98 | p = (*f) (); |
| 99 | if (foo_hidden () != -20) |
| 100 | abort (); |
| 101 | if (*ret != 1 || (*p) () != *ret) |
| 102 | abort (); |
| 103 | |
| 104 | f = dlsym (h, "get_foo_protected_p"); |
| 105 | if (f == NULL) |
| 106 | { |
| 107 | printf ("symbol not found: %s\n", dlerror ()); |
| 108 | return 1; |
| 109 | } |
| 110 | |
| 111 | ret = dlsym (h, "ret_foo_protected"); |
| 112 | if (ret == NULL) |
| 113 | { |
| 114 | printf ("symbol not found: %s\n", dlerror ()); |
| 115 | return 1; |
| 116 | } |
| 117 | |
| 118 | p = (*f) (); |
| 119 | if (p == foo_protected) |
| 120 | abort (); |
| 121 | if (foo_protected () != -40) |
| 122 | abort (); |
| 123 | if (*ret != 0 || (*p) () != *ret) |
| 124 | abort (); |
| 125 | |
| 126 | if (dlclose (h) != 0) |
| 127 | { |
| 128 | printf ("cannot close: %s\n", dlerror ()); |
| 129 | return 1; |
| 130 | } |
| 131 | |
| 132 | return 0; |
| 133 | } |