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[src/trunk]: src Add ifunc support for statically linked applications on x86, ...
details: https://anonhg.NetBSD.org/src/rev/c77383ec2ac9
branches: trunk
changeset: 831069:c77383ec2ac9
user: joerg <joerg%NetBSD.org@localhost>
date: Fri Mar 09 20:20:47 2018 +0000
description:
Add ifunc support for statically linked applications on x86, ppc, sparc
and ARM.
diffstat:
distrib/sets/lists/debug/mi | 3 +-
distrib/sets/lists/tests/mi | 4 +-
lib/csu/common/crt0-common.c | 81 +++++++++++++++++++++++++++++++++++++++-
tests/lib/csu/Makefile | 8 +++-
tests/lib/csu/h_ifunc_static.c | 64 ++++++++++++++++++++++++++++++++
tests/lib/csu/t_ifunc_static.sh | 56 ++++++++++++++++++++++++++++
6 files changed, 210 insertions(+), 6 deletions(-)
diffs (truncated from 303 to 300 lines):
diff -r 236ed34c0369 -r c77383ec2ac9 distrib/sets/lists/debug/mi
--- a/distrib/sets/lists/debug/mi Fri Mar 09 20:19:25 2018 +0000
+++ b/distrib/sets/lists/debug/mi Fri Mar 09 20:20:47 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.243 2018/02/17 08:07:06 wiz Exp $
+# $NetBSD: mi,v 1.244 2018/03/09 20:20:48 joerg Exp $
./etc/mtree/set.debug comp-sys-root
./usr/lib comp-sys-usr compatdir
./usr/lib/i18n/libBIG5_g.a comp-c-debuglib debuglib,compatfile
@@ -1865,6 +1865,7 @@
./usr/libdata/debug/usr/tests/kyua-testers/stacktrace_helper.debug tests-kyua-tests debug,atf,kyua,compattestfile
./usr/libdata/debug/usr/tests/kyua-testers/stacktrace_test.debug tests-kyua-tests debug,atf,kyua,compattestfile
./usr/libdata/debug/usr/tests/kyua-testers/text_test.debug tests-kyua-tests debug,atf,kyua,compattestfile
+./usr/libdata/debug/usr/tests/lib/csu/h_ifunc_static.debug tests-lib-debug debug,atf,compattestfile
./usr/libdata/debug/usr/tests/lib/csu/h_initfini.debug tests-obsolete obsolete,compattestfile
./usr/libdata/debug/usr/tests/lib/csu/h_initfini1.debug tests-lib-debug debug,atf,compattestfile
./usr/libdata/debug/usr/tests/lib/csu/h_initfini2.debug tests-lib-debug debug,atf,compattestfile
diff -r 236ed34c0369 -r c77383ec2ac9 distrib/sets/lists/tests/mi
--- a/distrib/sets/lists/tests/mi Fri Mar 09 20:19:25 2018 +0000
+++ b/distrib/sets/lists/tests/mi Fri Mar 09 20:20:47 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.775 2018/02/22 14:24:03 martin Exp $
+# $NetBSD: mi,v 1.776 2018/03/09 20:20:48 joerg Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -2399,11 +2399,13 @@
./usr/tests/lib/csu tests-lib-tests compattestfile,atf
./usr/tests/lib/csu/Atffile tests-lib-tests compattestfile,atf
./usr/tests/lib/csu/Kyuafile tests-lib-tests compattestfile,atf,kyua
+./usr/tests/lib/csu/h_ifunc_static tests-lib-tests compattestfile,atf
./usr/tests/lib/csu/h_initfini tests-obsolete obsolete
./usr/tests/lib/csu/h_initfini1 tests-lib-tests compattestfile,atf
./usr/tests/lib/csu/h_initfini2 tests-lib-tests compattestfile,atf
./usr/tests/lib/csu/h_initfini3 tests-lib-tests compattestfile,atf
./usr/tests/lib/csu/t_crt0 tests-lib-tests compattestfile,atf
+./usr/tests/lib/csu/t_ifunc_static tests-lib-tests compattestfile,atf
./usr/tests/lib/libbluetooth tests-lib-tests compattestfile,atf
./usr/tests/lib/libbluetooth/Atffile tests-lib-tests compattestfile,atf
./usr/tests/lib/libbluetooth/Kyuafile tests-lib-tests compattestfile,atf,kyua
diff -r 236ed34c0369 -r c77383ec2ac9 lib/csu/common/crt0-common.c
--- a/lib/csu/common/crt0-common.c Fri Mar 09 20:19:25 2018 +0000
+++ b/lib/csu/common/crt0-common.c Fri Mar 09 20:20:47 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: crt0-common.c,v 1.14 2016/06/07 12:07:35 joerg Exp $ */
+/* $NetBSD: crt0-common.c,v 1.15 2018/03/09 20:20:47 joerg Exp $ */
/*
* Copyright (c) 1998 Christos Zoulas
@@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: crt0-common.c,v 1.14 2016/06/07 12:07:35 joerg Exp $");
+__RCSID("$NetBSD: crt0-common.c,v 1.15 2018/03/09 20:20:47 joerg Exp $");
#include <sys/types.h>
#include <sys/exec.h>
@@ -127,6 +127,74 @@
}
#endif /* HAVE_INITFINI_ARRAY */
+#if defined(__x86_64__) || defined(__powerpc__) || defined(__sparc__)
+#define HAS_IPLTA
+static void fix_iplta(void) __noinline;
+#elif defined(__i386__) || defined(__arm__)
+#define HAS_IPLT
+static void fix_iplt(void) __noinline;
+#endif
+
+
+#ifdef HAS_IPLTA
+#include <stdio.h>
+extern const Elf_Rela __rela_iplt_start[] __dso_hidden __weak;
+extern const Elf_Rela __rela_iplt_end[] __dso_hidden __weak;
+
+static void
+fix_iplta(void)
+{
+ const Elf_Rela *rela, *relalim;
+ uintptr_t relocbase = 0;
+ Elf_Addr *where, target;
+
+ rela = __rela_iplt_start;
+ relalim = __rela_iplt_end;
+#if DEBUG
+ printf("%p - %p\n", rela, relalim);
+#endif
+ for (; rela < relalim; ++rela) {
+ if (ELF_R_TYPE(rela->r_info) != R_TYPE(IRELATIVE))
+ abort();
+ where = (Elf_Addr *)(relocbase + rela->r_offset);
+#if DEBUG
+ printf("location: %p\n", where);
+#endif
+ target = (Elf_Addr)(relocbase + rela->r_addend);
+#if DEBUG
+ printf("target: %p\n", (void *)target);
+#endif
+ target = ((Elf_Addr(*)(void))target)();
+#if DEBUG
+ printf("...resolves to: %p\n", (void *)target);
+#endif
+ *where = target;
+ }
+}
+#endif
+#ifdef HAS_IPLT
+extern const Elf_Rel __rel_iplt_start[] __dso_hidden __weak;
+extern const Elf_Rel __rel_iplt_end[] __dso_hidden __weak;
+
+static void
+fix_iplt(void)
+{
+ const Elf_Rel *rel, *rellim;
+ uintptr_t relocbase = 0;
+ Elf_Addr *where, target;
+
+ rel = __rel_iplt_start;
+ rellim = __rel_iplt_end;
+ for (; rel < rellim; ++rel) {
+ if (ELF_R_TYPE(rel->r_info) != R_TYPE(IRELATIVE))
+ abort();
+ where = (Elf_Addr *)(relocbase + rel->r_offset);
+ target = ((Elf_Addr(*)(void))*where)();
+ *where = target;
+ }
+}
+#endif
+
void
___start(void (*cleanup)(void), /* from shared loader */
const Obj_Entry *obj, /* from shared loader */
@@ -162,6 +230,15 @@
_libc_init();
+ if (&rtld_DYNAMIC == NULL) {
+#ifdef HAS_IPLTA
+ fix_iplta();
+#endif
+#ifdef HAS_IPLT
+ fix_iplt();
+#endif
+ }
+
#ifdef HAVE_INITFINI_ARRAY
_preinit();
#endif
diff -r 236ed34c0369 -r c77383ec2ac9 tests/lib/csu/Makefile
--- a/tests/lib/csu/Makefile Fri Mar 09 20:19:25 2018 +0000
+++ b/tests/lib/csu/Makefile Fri Mar 09 20:20:47 2018 +0000
@@ -1,11 +1,11 @@
-# $NetBSD: Makefile,v 1.5 2016/04/04 09:52:02 joerg Exp $
+# $NetBSD: Makefile,v 1.6 2018/03/09 20:20:47 joerg Exp $
NOMAN= # defined
.include <bsd.own.mk>
TESTSDIR= ${TESTSBASE}/lib/csu
-TESTS_SH= t_crt0
+TESTS_SH= t_crt0 t_ifunc_static
TESTS_SUBDIRS=
SUBDIR+= dso
@@ -24,4 +24,8 @@
${SRCS_CHECK_STACK}
LDADD.h_initfini3+= -Wl,-rpath,${TESTSDIR}
+PROGS+= h_ifunc_static
+SRCS.h_ifunc_static= h_ifunc_static.c
+LDSTATIC.h_ifunc_static=-static
+
.include <bsd.test.mk>
diff -r 236ed34c0369 -r c77383ec2ac9 tests/lib/csu/h_ifunc_static.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/csu/h_ifunc_static.c Fri Mar 09 20:20:47 2018 +0000
@@ -0,0 +1,64 @@
+/* $NetBSD: h_ifunc_static.c,v 1.1 2018/03/09 20:20:47 joerg Exp $ */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Joerg Sonnenberger.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+static long long
+ifunc1(void)
+{
+ return 0xdeadbeefll;
+}
+
+static long long
+ifunc2(void)
+{
+ return 0xbeefdeadll;
+}
+
+static __attribute__((used))
+long long (*resolve_ifunc(void))(void)
+{
+ const char *e = getenv("USE_IFUNC2");
+ return e && strcmp(e, "1") == 0 ? ifunc2 : ifunc1;
+}
+
+__ifunc(ifunc, resolve_ifunc);
+extern long long ifunc(void);
+
+int
+main(int argc, char **argv)
+{
+
+ if (argc != 2)
+ return 1;
+ return atoll(argv[1]) != ifunc();
+}
diff -r 236ed34c0369 -r c77383ec2ac9 tests/lib/csu/t_ifunc_static.sh
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/csu/t_ifunc_static.sh Fri Mar 09 20:20:47 2018 +0000
@@ -0,0 +1,56 @@
+# $NetBSD: t_ifunc_static.sh,v 1.1 2018/03/09 20:20:47 joerg Exp $
+#
+# Copyright (c) 2018 The NetBSD Foundation, Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+atf_test_case ifunc_static
+ifunc_static_head()
+{
+ atf_set "descr" "Checks support for ifunc relocations in static binaries"
+}
+ifunc_static_body()
+{
+ case `uname -m` in
+ i386|amd64|*ppc*|*sparc*|*arm*)
+ ;;
+ *)
+ atf_skip "ifunc is supposed only on ARM, i386, PowerPC, SPARC and x86-64"
+ ;;
+ esac
+
+ USE_IFUNC2=0 "$(atf_get_srcdir)/h_ifunc_static" 3735928559
+ atf_check_equal $? 0
+ USE_IFUNC2=0 "$(atf_get_srcdir)/h_ifunc_static" 3203391149
+ atf_check_equal $? 1
+ USE_IFUNC2=1 "$(atf_get_srcdir)/h_ifunc_static" 3735928559
+ atf_check_equal $? 1
+ USE_IFUNC2=1 "$(atf_get_srcdir)/h_ifunc_static" 3203391149
+ atf_check_equal $? 0
+}
+
+atf_init_test_cases()
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