Merge commit 'upstream/2.20'

[msp430-binutils.git] / gold / testsuite / justsyms_1.cc

diff --git a/gold/testsuite/justsyms_1.cc b/gold/testsuite/justsyms_1.cc
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+// justsyms_1.cc -- test --just-symbols for gold
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// The Linux kernel builds an object file using a linker script, and
+// then links against that object file using the -R option.  This is a
+// test for that usage.
+
+#include <cassert>
+#include <csignal>
+#include <cstddef>
+#include <cstdlib>
+#include <stdint.h>
+
+extern char justsyms_string[];
+
+// We expect to get a SIGSEGV.
+static void
+handle_sigsegv(int)
+{
+  exit(0);
+}
+
+int
+main(int, char**)
+{
+  // The linker script should arrange for this symbol to be exactly at
+  // address 0x10000.
+  assert(reinterpret_cast<uintptr_t>(justsyms_string) == 0x100);
+
+  // However, since the file was linked with --just-symbols, we should
+  // not be able to actually access the symbol.
+  signal(SIGSEGV, handle_sigsegv);
+  char c = justsyms_string[0];
+  exit(c == '\0' ? 1 : c);
+}