2008-03-13 22:04:21 +01:00
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// ver_test_4.cc -- a test case for gold
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2007-12-22 00:31:19 +01:00
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2016-01-01 12:25:12 +01:00
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// Copyright (C) 2007-2016 Free Software Foundation, Inc.
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2007-12-22 01:50:43 +01:00
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// Written by Cary Coutant <ccoutant@google.com>.
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2007-12-22 00:31:19 +01:00
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#include "ver_test.h"
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Fix symbol versioning problems in PR 18703.
If a symbol is defined with ".symver foo,foo@VER", the assembler
creates two symbols in the object: one unversioned, and one with
the (non-default) version "VER". If foo is listed in a version
script, gold would then make the first of those symbols the
default version, and would ignore the second symbol as a
duplicate, without making it a non-default version. While this is
arguably reasonable behavior, it doesn't match Gnu ld behavior,
so this patch fixes that by allowing the second definition to
override the first by resetting the "default version" indication.
Several test cases from the Gnu ld testsuite also exposed another
related problem, where a symbol defined with ".symver foo,foo@",
placed into a shared library, is not handled properly by gold.
This patch also fixes that case, binding the symbol to the base
version.
gold/
PR gold/18703
* dynobj.cc (Versions::record_version): Handle symbol defined with
base version.
(Versions::symbol_section_contents): Likewise.
* symtab.h (Symbol::set_is_not_default): New class method.
(Symbol_table::resolve): Add is_default_version parameter.
(Symbol_table::should_override): Likewise.
* resolve.cc (Symbol_table::resolve): Add is_default_version parameter,
and pass to should_override. Adjust all callers and explicit
instantiations.
(Symbol_table::should_override): Add is_default_value parameter;
allow default version in a dynamic object to override existing
definition from same object.
* symtab.cc (Symbol_table::add_from_object): Handle case where same
symbol is defined as unversioned and non-default version in the same
object.
* testsuite/Makefile.am (ver_test_13): New test case.
* testsuite/Makefile.in: Regenerate.
* testsuite/ver_test_4.cc: Add test for symbol with base version.
* testsuite/ver_test_4.sh: Likewise.
* testsuite/ver_test_13.c: New source file.
* testsuite/ver_test_13.script: New version script.
* testsuite/ver_test_13.sh: New test case.
2015-07-28 00:09:08 +02:00
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__asm__(".symver t1_2_orig,t1_2@");
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extern "C"
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int
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t1_2_orig()
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{
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TRACE
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return 12;
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}
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2007-12-22 00:31:19 +01:00
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__asm__(".symver t1_2_a,t1_2@@VER2");
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extern "C"
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int
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t1_2_a()
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{
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TRACE
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return 12;
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}
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__asm__(".symver t2_2_a,t2_2@VER1");
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extern "C"
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int
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t2_2_a()
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{
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TRACE
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return 21;
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}
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__asm__(".symver t2_2_b,t2_2@@VER2");
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extern "C"
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int
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t2_2_b()
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{
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TRACE
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return 22;
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}
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2008-07-18 09:03:27 +02:00
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// This function is given a version by the version script, and should
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// be overridden by the main program.
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int
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t4_2a()
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{
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TRACE
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return -42;
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}
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