| 1 | // justsyms_1.cc -- test --just-symbols for gold |
| 2 | |
| 3 | // Copyright 2008 Free Software Foundation, Inc. |
| 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. |
| 47 | assert(reinterpret_cast<uintptr_t>(justsyms_string) == 0x100); |
| 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 | } |