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52b2a80f | 1 | /* Test setjmp interoperability with static dlopen BZ #21895. |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
52b2a80f RA |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
52b2a80f RA |
18 | |
19 | #include <setjmp.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <dlfcn.h> | |
23 | ||
24 | /* Set TOC area pointed by sp to zero. */ | |
25 | #define SET_TOC_TO_ZERO(sp) \ | |
26 | ({ \ | |
27 | unsigned int zero = 0; \ | |
28 | asm volatile ("std %0, 24(%1)\n\t" :: "r" (zero), "r" (sp)); \ | |
29 | }) | |
30 | ||
31 | static void | |
32 | bar (jmp_buf jb, unsigned long sp) | |
33 | { | |
34 | static int i; | |
35 | if (i++==1) | |
36 | exit(0); /* Success. */ | |
37 | ||
38 | /* This will set TOC are on caller frame (foo) to zero. __longjmp | |
39 | must restore r2 otherwise a segmentation fault will happens after | |
40 | it jumps back to foo. */ | |
41 | SET_TOC_TO_ZERO(sp); | |
42 | longjmp(jb, i); | |
43 | } | |
44 | ||
45 | static int | |
46 | do_test (void) | |
47 | { | |
48 | void *h = dlopen("setjmp-bug21895.so", RTLD_NOW); | |
49 | if (!h) | |
50 | { | |
51 | puts(dlerror()); | |
52 | return 1; | |
53 | } | |
54 | ||
55 | void (*pfoo)(void) = dlsym(h, "foo"); | |
56 | if (!pfoo) | |
57 | { | |
58 | puts(dlerror()); | |
59 | return 1; | |
60 | } | |
61 | ||
62 | void (**ppbar)(jmp_buf, unsigned long) = dlsym(h, "bar"); | |
63 | if (!ppbar) | |
64 | { | |
65 | puts(dlerror()); | |
66 | return 1; | |
67 | } | |
68 | ||
69 | *ppbar = bar; | |
70 | pfoo(); | |
71 | ||
72 | for(;;); | |
73 | } | |
74 | ||
75 | #include <support/test-driver.c> |