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88dd47ac ILT |
1 | // justsyms_1.cc -- test --just-symbols for gold |
2 | ||
2571583a | 3 | // Copyright (C) 2008-2017 Free Software Foundation, Inc. |
88dd47ac ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | // The Linux kernel builds an object file using a linker script, and | |
24 | // then links against that object file using the -R option. This is a | |
25 | // test for that usage. | |
26 | ||
27 | #include <cassert> | |
28 | #include <csignal> | |
29 | #include <cstddef> | |
30 | #include <cstdlib> | |
31 | #include <stdint.h> | |
32 | ||
33 | extern char justsyms_string[]; | |
34 | ||
35 | // We expect to get a SIGSEGV. | |
36 | static void | |
37 | handle_sigsegv(int) | |
38 | { | |
39 | exit(0); | |
40 | } | |
41 | ||
42 | int | |
43 | main(int, char**) | |
44 | { | |
45 | // The linker script should arrange for this symbol to be exactly at | |
46 | // address 0x10000. | |
7c98e6bb | 47 | assert(reinterpret_cast<uintptr_t>(justsyms_string) == 0x100); |
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48 | |
49 | // However, since the file was linked with --just-symbols, we should | |
50 | // not be able to actually access the symbol. | |
51 | signal(SIGSEGV, handle_sigsegv); | |
52 | char c = justsyms_string[0]; | |
53 | exit(c == '\0' ? 1 : c); | |
54 | } |