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