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d1bddd3c CC |
1 | // ehdr_start_test.cc -- test for __ehdr_start linker-defined symbol. |
2 | ||
b3adc24a | 3 | // Copyright (C) 2014-2020 Free Software Foundation, Inc. |
d1bddd3c CC |
4 | // Written by Cary Coutant <ccoutant@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 goal of this program is to produce as many different types of | |
24 | // relocations as we can in a stand-alone program that does not use | |
25 | // TLS. This program is compiled without optimization. | |
26 | ||
27 | #include "config.h" | |
28 | ||
29 | #include <cassert> | |
30 | #include <cstdio> | |
31 | ||
32 | #include "elfcpp.h" | |
33 | ||
34 | #ifdef EHDR_START_WEAK | |
35 | #define WEAK_ATTR __attribute__ ((weak)) | |
36 | #else | |
37 | #define WEAK_ATTR | |
38 | #endif | |
39 | ||
40 | extern char __ehdr_start[] WEAK_ATTR; | |
41 | ||
42 | int | |
43 | main() { | |
44 | printf("&__ehdr_start = %p\n", &__ehdr_start); | |
45 | ||
46 | #ifdef EHDR_START_UNDEF | |
47 | assert(&__ehdr_start == 0); | |
48 | #else | |
49 | assert(&__ehdr_start != NULL); | |
50 | ||
51 | printf("ELF header: \\x%02x%c%c%c\n", __ehdr_start[0], __ehdr_start[1], | |
52 | __ehdr_start[2], __ehdr_start[3]); | |
53 | #ifdef EHDR_START_USER_DEF | |
54 | assert(__ehdr_start[0] == 'a' | |
55 | && __ehdr_start[1] == 'b' | |
56 | && __ehdr_start[2] == 'c' | |
57 | && __ehdr_start[3] == 'd'); | |
58 | #else | |
59 | assert(__ehdr_start[elfcpp::EI_MAG0] == elfcpp::ELFMAG0 | |
60 | && __ehdr_start[elfcpp::EI_MAG1] == elfcpp::ELFMAG1 | |
61 | && __ehdr_start[elfcpp::EI_MAG2] == elfcpp::ELFMAG2 | |
62 | && __ehdr_start[elfcpp::EI_MAG3] == elfcpp::ELFMAG3); | |
63 | #endif | |
64 | #endif | |
65 | ||
66 | return 0; | |
67 | } |