[binutils-gdb] Add -z bndplt support (for Intel MPX).
Cary Coutant
ccoutant@sourceware.org
Fri Dec 23 04:09:00 GMT 2016
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=7a0c0a1475bf41913c7f25a9e363df26c8f772a1
commit 7a0c0a1475bf41913c7f25a9e363df26c8f772a1
Author: Cary Coutant <ccoutant@gmail.com>
Date: Fri Dec 16 19:17:38 2016 -0800
Add -z bndplt support (for Intel MPX).
gold/
PR gold/17643
* options.h (-z bndplt): New option.
* x86_64.cc (Output_data_plt_x86_64::regular_count): New method.
(Output_data_plt_x86_64::address_for_global): Move implementation into
virtual method.
(Output_data_plt_x86_64::address_for_local): Likewise.
(Output_data_plt_x86_64::got): New method.
(Output_data_plt_x86_64::got_plt): New method.
(Output_data_plt_x86_64::got_irelative): New method.
(Output_data_plt_x86_64::do_address_for_global): New virtual method.
(Output_data_plt_x86_64::do_address_for_local): New virtual method.
(class Output_data_plt_x86_64_bnd): New class.
(Target_x86_64::do_make_data_plt): Move out of line and specialize
for each size (both overloads).
(Output_data_plt_x86_64::set_final_data_size): Cosmetic changes.
* testsuite/Makefile.am (bnd_plt_1): New test case.
(bnd_ifunc_1): New test case.
(bnd_ifunc_2): New test case.
* testsuite/Makefile.in: Regenerate.
* testsuite/bnd_ifunc_1.s: New source file.
* testsuite/bnd_ifunc_1.sh: New shell script.
* testsuite/bnd_ifunc_2.s: New source file.
* testsuite/bnd_ifunc_2.sh: New shell script.
* testsuite/bnd_plt_1.s: New source file.
* testsuite/bnd_plt_1.sh: New shell script.
Diff:
---
gold/ChangeLog | 28 +++
gold/options.h | 3 +
gold/testsuite/Makefile.am | 29 ++-
gold/testsuite/Makefile.in | 42 +++-
gold/testsuite/bnd_ifunc_1.s | 16 ++
gold/testsuite/bnd_ifunc_1.sh | 36 +++
gold/testsuite/bnd_ifunc_2.s | 28 +++
gold/testsuite/bnd_ifunc_2.sh | 50 ++++
gold/testsuite/bnd_plt_1.s | 9 +
gold/testsuite/bnd_plt_1.sh | 52 +++++
gold/x86_64.cc | 520 ++++++++++++++++++++++++++++++++++++++++--
11 files changed, 788 insertions(+), 25 deletions(-)
diff --git a/gold/ChangeLog b/gold/ChangeLog
index 5971af9..fea77ca 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,5 +1,33 @@
2016-12-22 Cary Coutant <ccoutant@gmail.com>
+ PR gold/17643
+ * options.h (-z bndplt): New option.
+ * x86_64.cc (Output_data_plt_x86_64::regular_count): New method.
+ (Output_data_plt_x86_64::address_for_global): Move implementation into
+ virtual method.
+ (Output_data_plt_x86_64::address_for_local): Likewise.
+ (Output_data_plt_x86_64::got): New method.
+ (Output_data_plt_x86_64::got_plt): New method.
+ (Output_data_plt_x86_64::got_irelative): New method.
+ (Output_data_plt_x86_64::do_address_for_global): New virtual method.
+ (Output_data_plt_x86_64::do_address_for_local): New virtual method.
+ (class Output_data_plt_x86_64_bnd): New class.
+ (Target_x86_64::do_make_data_plt): Move out of line and specialize
+ for each size (both overloads).
+ (Output_data_plt_x86_64::set_final_data_size): Cosmetic changes.
+ * testsuite/Makefile.am (bnd_plt_1): New test case.
+ (bnd_ifunc_1): New test case.
+ (bnd_ifunc_2): New test case.
+ * testsuite/Makefile.in: Regenerate.
+ * testsuite/bnd_ifunc_1.s: New source file.
+ * testsuite/bnd_ifunc_1.sh: New shell script.
+ * testsuite/bnd_ifunc_2.s: New source file.
+ * testsuite/bnd_ifunc_2.sh: New shell script.
+ * testsuite/bnd_plt_1.s: New source file.
+ * testsuite/bnd_plt_1.sh: New shell script.
+
+2016-12-22 Cary Coutant <ccoutant@gmail.com>
+
* layout.cc (Layout::finalize): Track count of forced-local symbols
in .dynsym.
(Layout::create_symtab_sections): Add local_dynamic_count parameter;
diff --git a/gold/options.h b/gold/options.h
index ebe08df..32d8b05 100644
--- a/gold/options.h
+++ b/gold/options.h
@@ -1403,6 +1403,9 @@ class General_options
// The -z options.
+ DEFINE_bool(bndplt, options::DASH_Z, '\0', false,
+ N_("(x86-64 only) Generate a BND PLT for Intel MPX"),
+ N_("Generate a regular PLT"));
DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
N_("Sort dynamic relocs"),
N_("Do not sort dynamic relocs"));
diff --git a/gold/testsuite/Makefile.am b/gold/testsuite/Makefile.am
index 46135a3..6a882ea 100644
--- a/gold/testsuite/Makefile.am
+++ b/gold/testsuite/Makefile.am
@@ -3046,7 +3046,7 @@ if DEFAULT_TARGET_X86_64
check_PROGRAMS += exception_x86_64_bnd_test
exception_x86_64_bnd_test_SOURCES = exception_test_main.cc
exception_x86_64_bnd_test_DEPENDENCIES = gcctestdir/ld exception_x86_64_bnd_1.o exception_x86_64_bnd_2.o
-exception_x86_64_bnd_test_LDFLAGS = $(exception_test_LDFLAGS)
+exception_x86_64_bnd_test_LDFLAGS = $(exception_test_LDFLAGS) -Wl,-z,bndplt
exception_x86_64_bnd_test_LDADD = exception_x86_64_bnd_1.o exception_x86_64_bnd_2.o
exception_x86_64_bnd_1.o: exception_test_1.cc gcctestdir/as
$(CXXCOMPILE) -c -fpic -Bgcctestdir/ -Wa,-madd-bnd-prefix -o $@ $<
@@ -3146,6 +3146,33 @@ split_x86_64_r.stdout: split_x86_64_1.o split_x86_64_n.o ../ld-new
MOSTLYCLEANFILES += split_x86_64_1 split_x86_64_2 split_x86_64_3 \
split_x86_64_4 split_x86_64_r
+check_SCRIPTS += bnd_plt_1.sh
+check_DATA += bnd_plt_1.stdout
+bnd_plt_1.o: bnd_plt_1.s
+ $(TEST_AS) --64 -o $@ $<
+bnd_plt_1.so: bnd_plt_1.o ../ld-new
+ ../ld-new -shared -z bndplt bnd_plt_1.o -o $@
+bnd_plt_1.stdout: bnd_plt_1.so
+ $(TEST_OBJDUMP) -dw $< > $@
+
+check_SCRIPTS += bnd_ifunc_1.sh
+check_DATA += bnd_ifunc_1.stdout
+bnd_ifunc_1.o: bnd_ifunc_1.s
+ $(TEST_AS) --64 -madd-bnd-prefix -o $@ $<
+bnd_ifunc_1.so: bnd_ifunc_1.o ../ld-new
+ ../ld-new -shared -z bndplt bnd_ifunc_1.o -o $@
+bnd_ifunc_1.stdout: bnd_ifunc_1.so
+ $(TEST_OBJDUMP) -dw $< > $@
+
+check_SCRIPTS += bnd_ifunc_2.sh
+check_DATA += bnd_ifunc_2.stdout
+bnd_ifunc_2.o: bnd_ifunc_2.s
+ $(TEST_AS) --64 -madd-bnd-prefix -o $@ $<
+bnd_ifunc_2.so: bnd_ifunc_2.o ../ld-new
+ ../ld-new -shared -z bndplt bnd_ifunc_2.o -o $@
+bnd_ifunc_2.stdout: bnd_ifunc_2.so
+ $(TEST_OBJDUMP) -dw $< > $@
+
endif DEFAULT_TARGET_X86_64
if DEFAULT_TARGET_X32
diff --git a/gold/testsuite/Makefile.in b/gold/testsuite/Makefile.in
index e5e3320..202aa9a 100644
--- a/gold/testsuite/Makefile.in
+++ b/gold/testsuite/Makefile.in
@@ -813,10 +813,18 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
@DEFAULT_TARGET_I386_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@am__append_89 = split_i386_1 split_i386_2 split_i386_3 \
@DEFAULT_TARGET_I386_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_i386_4 split_i386_r
-@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@am__append_90 = split_x86_64.sh
-@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@am__append_91 = split_x86_64_1.stdout split_x86_64_2.stdout \
-@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_x86_64_3.stdout split_x86_64_4.stdout split_x86_64_r.stdout
-
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@am__append_90 = split_x86_64.sh \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ bnd_plt_1.sh \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ bnd_ifunc_1.sh \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ bnd_ifunc_2.sh
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@am__append_91 = split_x86_64_1.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_x86_64_2.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_x86_64_3.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_x86_64_4.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_x86_64_r.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ bnd_plt_1.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ bnd_ifunc_1.stdout \
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ bnd_ifunc_2.stdout
@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@am__append_92 = split_x86_64_1 split_x86_64_2 split_x86_64_3 \
@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ split_x86_64_4 split_x86_64_r
@@ -3352,7 +3360,7 @@ LDADD = libgoldtest.a ../libgold.a ../../libiberty/libiberty.a $(LIBINTL) \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ehdr_start_test_5_LDADD =
@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@exception_x86_64_bnd_test_SOURCES = exception_test_main.cc
@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@exception_x86_64_bnd_test_DEPENDENCIES = gcctestdir/ld exception_x86_64_bnd_1.o exception_x86_64_bnd_2.o
-@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@exception_x86_64_bnd_test_LDFLAGS = $(exception_test_LDFLAGS)
+@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@exception_x86_64_bnd_test_LDFLAGS = $(exception_test_LDFLAGS) -Wl,-z,bndplt
@DEFAULT_TARGET_X86_64_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@exception_x86_64_bnd_test_LDADD = exception_x86_64_bnd_1.o exception_x86_64_bnd_2.o
@DEFAULT_TARGET_I386_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@SPLIT_DEFSYMS = --defsym __morestack=0x100 --defsym __morestack_non_split=0x200
@DEFAULT_TARGET_S390_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@SPLIT_DEFSYMS = --defsym __morestack=0x100 --defsym __morestack_non_split=0x200
@@ -5224,6 +5232,12 @@ split_i386.sh.log: split_i386.sh
@p='split_i386.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
split_x86_64.sh.log: split_x86_64.sh
@p='split_x86_64.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
+bnd_plt_1.sh.log: bnd_plt_1.sh
+ @p='bnd_plt_1.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
+bnd_ifunc_1.sh.log: bnd_ifunc_1.sh
+ @p='bnd_ifunc_1.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
+bnd_ifunc_2.sh.log: bnd_ifunc_2.sh
+ @p='bnd_ifunc_2.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
split_x32.sh.log: split_x32.sh
@p='split_x32.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
arm_abs_global.sh.log: arm_abs_global.sh
@@ -7318,6 +7332,24 @@ uninstall-am:
@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_OBJDUMP) -d $< > $@
@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@split_x86_64_r.stdout: split_x86_64_1.o split_x86_64_n.o ../ld-new
@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ ../ld-new -r split_x86_64_1.o split_x86_64_n.o -o split_x86_64_r > $@ 2>&1 || exit 0
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_plt_1.o: bnd_plt_1.s
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_AS) --64 -o $@ $<
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_plt_1.so: bnd_plt_1.o ../ld-new
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ ../ld-new -shared -z bndplt bnd_plt_1.o -o $@
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_plt_1.stdout: bnd_plt_1.so
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_OBJDUMP) -dw $< > $@
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_ifunc_1.o: bnd_ifunc_1.s
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_AS) --64 -madd-bnd-prefix -o $@ $<
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_ifunc_1.so: bnd_ifunc_1.o ../ld-new
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ ../ld-new -shared -z bndplt bnd_ifunc_1.o -o $@
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_ifunc_1.stdout: bnd_ifunc_1.so
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_OBJDUMP) -dw $< > $@
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_ifunc_2.o: bnd_ifunc_2.s
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_AS) --64 -madd-bnd-prefix -o $@ $<
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_ifunc_2.so: bnd_ifunc_2.o ../ld-new
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ ../ld-new -shared -z bndplt bnd_ifunc_2.o -o $@
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@bnd_ifunc_2.stdout: bnd_ifunc_2.so
+@DEFAULT_TARGET_X86_64_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_OBJDUMP) -dw $< > $@
@DEFAULT_TARGET_X32_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@split_x32_1.o: split_x32_1.s
@DEFAULT_TARGET_X32_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@ $(TEST_AS) -o $@ $<
@DEFAULT_TARGET_X32_TRUE@@NATIVE_OR_CROSS_LINKER_TRUE@split_x32_2.o: split_x32_2.s
diff --git a/gold/testsuite/bnd_ifunc_1.s b/gold/testsuite/bnd_ifunc_1.s
new file mode 100644
index 0000000..82b64f0
--- /dev/null
+++ b/gold/testsuite/bnd_ifunc_1.s
@@ -0,0 +1,16 @@
+ .type foo, %gnu_indirect_function
+ .global __GI_foo
+ .hidden __GI_foo
+ .set __GI_foo, foo
+ .text
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+.globl bar
+ .type bar, @function
+bar:
+ call __GI_foo@PLT
+ ret
+ .size bar, .-bar
diff --git a/gold/testsuite/bnd_ifunc_1.sh b/gold/testsuite/bnd_ifunc_1.sh
new file mode 100755
index 0000000..809b0cd
--- /dev/null
+++ b/gold/testsuite/bnd_ifunc_1.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# bnd_ifunc_1.sh -- test -z bndplt for x86_64
+
+# Copyright (C) 2016 Free Software Foundation, Inc.
+# Written by Cary Coutant <ccoutant@gmail.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.
+
+match()
+{
+ if ! egrep "$1" "$2" >/dev/null 2>&1; then
+ echo 1>&2 "could not find '$1' in $2"
+ exit 1
+ fi
+}
+
+match '[0-9a-f]*:.*bnd jmpq \*0x[0-9a-f]*\(%rip\) *# [0-9a-f]* <_GLOBAL_OFFSET_TABLE_\+0x18>' bnd_ifunc_1.stdout
+APLT_ADDR=$(egrep '[0-9a-f]*:.*bnd jmpq \*0x[0-9a-f]*\(%rip\) *# [0-9a-f]* <_GLOBAL_OFFSET_TABLE_\+0x18>' bnd_ifunc_1.stdout |
+ sed -e 's/ *\([0-9a-f]*\):.*/\1/')
+match "bnd callq $APLT_ADDR" bnd_ifunc_1.stdout
diff --git a/gold/testsuite/bnd_ifunc_2.s b/gold/testsuite/bnd_ifunc_2.s
new file mode 100644
index 0000000..86470a2
--- /dev/null
+++ b/gold/testsuite/bnd_ifunc_2.s
@@ -0,0 +1,28 @@
+ .text
+ .globl fct1
+ .type fct1, @gnu_indirect_function
+ .set fct1,resolve1
+ .hidden int_fct1
+ .globl int_fct1
+ .set int_fct1,fct1
+ .type resolve1, @function
+resolve1:
+ call func1@PLT
+ .globl g1
+ .type g1, @function
+g1:
+ jmp int_fct1@PLT
+
+ .globl fct2
+ .type fct2, @gnu_indirect_function
+ .set fct2,resolve2
+ .hidden int_fct2
+ .globl int_fct2
+ .set int_fct2,fct2
+ .type resolve2, @function
+resolve2:
+ call func2@PLT
+ .globl g2
+ .type g2, @function
+g2:
+ jmp int_fct2@PLT
diff --git a/gold/testsuite/bnd_ifunc_2.sh b/gold/testsuite/bnd_ifunc_2.sh
new file mode 100755
index 0000000..9476006
--- /dev/null
+++ b/gold/testsuite/bnd_ifunc_2.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+# bnd_ifunc_2.sh -- test -z bndplt for x86_64
+
+# Copyright (C) 2016 Free Software Foundation, Inc.
+# Written by Cary Coutant <ccoutant@gmail.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.
+
+match()
+{
+ if ! egrep "$1" "$2" >/dev/null 2>&1; then
+ echo 1>&2 "could not find '$1' in $2"
+ exit 1
+ fi
+}
+
+# Extract just the PLT portion of the disassembly.
+get_plt()
+{
+ sed -n -e '/^Disassembly of section .plt:/,/^Disassembly/p'
+}
+
+# Extract the addresses of the indirect jumps, omitting the PLT0 entry.
+get_aplt_jmpq_addresses()
+{
+ sed -n -e '/_GLOBAL_OFFSET_TABLE_+0x10/d' \
+ -e '/bnd jmpq \*0x[0-9a-f]*(%rip)/p' |
+ sed -e 's/ *\([0-9a-f]*\):.*/\1/'
+}
+
+for APLT_ADDR in $(get_plt < bnd_ifunc_2.stdout | get_aplt_jmpq_addresses)
+do
+ match "bnd (callq|jmpq) $APLT_ADDR" bnd_ifunc_2.stdout
+done
diff --git a/gold/testsuite/bnd_plt_1.s b/gold/testsuite/bnd_plt_1.s
new file mode 100644
index 0000000..bf62981
--- /dev/null
+++ b/gold/testsuite/bnd_plt_1.s
@@ -0,0 +1,9 @@
+ .text
+ .globl _start
+_start:
+bnd jmp foo1@plt
+ call foo2@plt
+ jmp foo3@plt
+ call foo4@plt
+bnd call foo3@plt
+ jmp foo4@plt
diff --git a/gold/testsuite/bnd_plt_1.sh b/gold/testsuite/bnd_plt_1.sh
new file mode 100755
index 0000000..ed8256f
--- /dev/null
+++ b/gold/testsuite/bnd_plt_1.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# bnd_plt_1.sh -- test -z bndplt for x86_64
+
+# Copyright (C) 2016 Free Software Foundation, Inc.
+# Written by Cary Coutant <ccoutant@gmail.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.
+
+match()
+{
+ if ! egrep "$1" "$2" >/dev/null 2>&1; then
+ echo 1>&2 "could not find '$1' in $2"
+ exit 1
+ fi
+}
+
+# Extract just the PLT portion of the disassembly.
+get_plt()
+{
+ sed -n -e '/^Disassembly of section .plt:/,/^Disassembly/p'
+}
+
+# Extract the addresses of the indirect jumps, omitting the PLT0 entry.
+get_aplt_jmpq_addresses()
+{
+ sed -n -e '/_GLOBAL_OFFSET_TABLE_+0x10/d' \
+ -e '/bnd jmpq \*0x[0-9a-f]*(%rip)/p' |
+ sed -e 's/ *\([0-9a-f]*\):.*/\1/'
+}
+
+match 'bnd jmpq \*0x[0-9a-f]*\(%rip\) *# [0-9a-f]* <_GLOBAL_OFFSET_TABLE_\+0x10>' bnd_plt_1.stdout
+
+for APLT_ADDR in $(get_plt < bnd_ifunc_2.stdout | get_aplt_jmpq_addresses)
+do
+ match "bnd (callq|jmpq) $APLT_ADDR" bnd_ifunc_2.stdout
+done
diff --git a/gold/x86_64.cc b/gold/x86_64.cc
index 9004aec..ad83aa0 100644
--- a/gold/x86_64.cc
+++ b/gold/x86_64.cc
@@ -179,7 +179,12 @@ class Output_data_plt_x86_64 : public Output_section_data
has_irelative_section() const
{ return this->irelative_rel_ != NULL; }
- // Return the number of PLT entries.
+ // Get count of regular PLT entries.
+ unsigned int
+ regular_count() const
+ { return this->count_; }
+
+ // Return the total number of PLT entries.
unsigned int
entry_count() const
{ return this->count_ + this->irelative_count_; }
@@ -204,11 +209,13 @@ class Output_data_plt_x86_64 : public Output_section_data
// Return the PLT address to use for a global symbol.
uint64_t
- address_for_global(const Symbol*);
+ address_for_global(const Symbol* sym)
+ { return do_address_for_global(sym); }
// Return the PLT address to use for a local symbol.
uint64_t
- address_for_local(const Relobj*, unsigned int symndx);
+ address_for_local(const Relobj* obj, unsigned int symndx)
+ { return do_address_for_local(obj, symndx); }
// Add .eh_frame information for the PLT.
void
@@ -216,6 +223,18 @@ class Output_data_plt_x86_64 : public Output_section_data
{ this->do_add_eh_frame(layout); }
protected:
+ Output_data_got<64, false>*
+ got() const
+ { return this->got_; }
+
+ Output_data_got_plt_x86_64*
+ got_plt() const
+ { return this->got_plt_; }
+
+ Output_data_space*
+ got_irelative() const
+ { return this->got_irelative_; }
+
// Fill in the first PLT entry.
void
fill_first_plt_entry(unsigned char* pov,
@@ -275,6 +294,14 @@ class Output_data_plt_x86_64 : public Output_section_data
unsigned int tlsdesc_got_offset,
unsigned int plt_offset) = 0;
+ // Return the PLT address to use for a global symbol.
+ virtual uint64_t
+ do_address_for_global(const Symbol* sym);
+
+ // Return the PLT address to use for a local symbol.
+ virtual uint64_t
+ do_address_for_local(const Relobj* obj, unsigned int symndx);
+
virtual void
do_add_eh_frame(Layout* layout) = 0;
@@ -403,6 +430,118 @@ class Output_data_plt_x86_64_standard : public Output_data_plt_x86_64<size>
static const unsigned char plt_eh_frame_fde[plt_eh_frame_fde_size];
};
+class Output_data_plt_x86_64_bnd : public Output_data_plt_x86_64<64>
+{
+ public:
+ Output_data_plt_x86_64_bnd(Layout* layout,
+ Output_data_got<64, false>* got,
+ Output_data_got_plt_x86_64* got_plt,
+ Output_data_space* got_irelative)
+ : Output_data_plt_x86_64<64>(layout, plt_entry_size,
+ got, got_plt, got_irelative),
+ aplt_offset_(0)
+ { }
+
+ Output_data_plt_x86_64_bnd(Layout* layout,
+ Output_data_got<64, false>* got,
+ Output_data_got_plt_x86_64* got_plt,
+ Output_data_space* got_irelative,
+ unsigned int plt_count)
+ : Output_data_plt_x86_64<64>(layout, plt_entry_size,
+ got, got_plt, got_irelative,
+ plt_count),
+ aplt_offset_(0)
+ { }
+
+ protected:
+ virtual unsigned int
+ do_get_plt_entry_size() const
+ { return plt_entry_size; }
+
+ // Return the PLT address to use for a global symbol.
+ uint64_t
+ do_address_for_global(const Symbol*);
+
+ // Return the PLT address to use for a local symbol.
+ uint64_t
+ do_address_for_local(const Relobj*, unsigned int symndx);
+
+ virtual void
+ do_add_eh_frame(Layout* layout)
+ {
+ layout->add_eh_frame_for_plt(this,
+ this->plt_eh_frame_cie,
+ this->plt_eh_frame_cie_size,
+ plt_eh_frame_fde,
+ plt_eh_frame_fde_size);
+ }
+
+ virtual void
+ do_fill_first_plt_entry(unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_addr,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_addr);
+
+ virtual unsigned int
+ do_fill_plt_entry(unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address,
+ unsigned int got_offset,
+ unsigned int plt_offset,
+ unsigned int plt_index);
+
+ virtual void
+ do_fill_tlsdesc_entry(unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_base,
+ unsigned int tlsdesc_got_offset,
+ unsigned int plt_offset);
+
+ void
+ fill_aplt_entry(unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address,
+ unsigned int got_offset,
+ unsigned int plt_offset,
+ unsigned int plt_index);
+
+ private:
+ // Set the final size.
+ void
+ set_final_data_size();
+
+ // Write out the BND PLT data.
+ void
+ do_write(Output_file*);
+
+ // Offset of the Additional PLT (if using -z bndplt).
+ unsigned int aplt_offset_;
+
+ // The size of an entry in the PLT.
+ static const int plt_entry_size = 16;
+
+ // The size of an entry in the additional PLT.
+ static const int aplt_entry_size = 8;
+
+ // The first entry in the PLT.
+ // From the AMD64 ABI: "Unlike Intel386 ABI, this ABI uses the same
+ // procedure linkage table for both programs and shared objects."
+ static const unsigned char first_plt_entry[plt_entry_size];
+
+ // Other entries in the PLT for an executable.
+ static const unsigned char plt_entry[plt_entry_size];
+
+ // Entries in the additional PLT.
+ static const unsigned char aplt_entry[aplt_entry_size];
+
+ // The reserved TLSDESC entry in the PLT for an executable.
+ static const unsigned char tlsdesc_plt_entry[plt_entry_size];
+
+ // The .eh_frame unwind information for the PLT.
+ static const int plt_eh_frame_fde_size = 32;
+ static const unsigned char plt_eh_frame_fde[plt_eh_frame_fde_size];
+};
+
template<int size>
class Lazy_view
{
@@ -714,23 +853,14 @@ class Target_x86_64 : public Sized_target<size, false>
do_make_data_plt(Layout* layout,
Output_data_got<64, false>* got,
Output_data_got_plt_x86_64* got_plt,
- Output_data_space* got_irelative)
- {
- return new Output_data_plt_x86_64_standard<size>(layout, got, got_plt,
- got_irelative);
- }
+ Output_data_space* got_irelative);
virtual Output_data_plt_x86_64<size>*
do_make_data_plt(Layout* layout,
Output_data_got<64, false>* got,
Output_data_got_plt_x86_64* got_plt,
Output_data_space* got_irelative,
- unsigned int plt_count)
- {
- return new Output_data_plt_x86_64_standard<size>(layout, got, got_plt,
- got_irelative,
- plt_count);
- }
+ unsigned int plt_count);
private:
// The class which scans relocations.
@@ -1528,7 +1658,7 @@ Output_data_plt_x86_64<size>::rela_irelative(Symbol_table* symtab,
template<int size>
uint64_t
-Output_data_plt_x86_64<size>::address_for_global(const Symbol* gsym)
+Output_data_plt_x86_64<size>::do_address_for_global(const Symbol* gsym)
{
uint64_t offset = 0;
if (gsym->type() == elfcpp::STT_GNU_IFUNC
@@ -1542,8 +1672,8 @@ Output_data_plt_x86_64<size>::address_for_global(const Symbol* gsym)
template<int size>
uint64_t
-Output_data_plt_x86_64<size>::address_for_local(const Relobj* object,
- unsigned int r_sym)
+Output_data_plt_x86_64<size>::do_address_for_local(const Relobj* object,
+ unsigned int r_sym)
{
return (this->address()
+ (this->count_ + 1) * this->get_plt_entry_size()
@@ -1555,10 +1685,12 @@ template<int size>
void
Output_data_plt_x86_64<size>::set_final_data_size()
{
- unsigned int count = this->count_ + this->irelative_count_;
+ // Number of regular and IFUNC PLT entries, plus the first entry.
+ unsigned int count = this->count_ + this->irelative_count_ + 1;
+ // Count the TLSDESC entry, if present.
if (this->has_tlsdesc_entry())
++count;
- this->set_data_size((count + 1) * this->get_plt_entry_size());
+ this->set_data_size(count * this->get_plt_entry_size());
}
// The first entry in the PLT for an executable.
@@ -1673,6 +1805,178 @@ Output_data_plt_x86_64_standard<size>::do_fill_tlsdesc_entry(
+ 12)));
}
+// Return the APLT address to use for a global symbol (for -z bndplt).
+
+uint64_t
+Output_data_plt_x86_64_bnd::do_address_for_global(const Symbol* gsym)
+{
+ uint64_t offset = this->aplt_offset_;
+ // Convert the PLT offset into an APLT offset.
+ unsigned int plt_offset = gsym->plt_offset();
+ if (gsym->type() == elfcpp::STT_GNU_IFUNC
+ && gsym->can_use_relative_reloc(false))
+ offset += this->regular_count() * aplt_entry_size;
+ else
+ plt_offset -= plt_entry_size;
+ plt_offset = plt_offset / (plt_entry_size / aplt_entry_size);
+ return this->address() + offset + plt_offset;
+}
+
+// Return the PLT address to use for a local symbol. These are always
+// IRELATIVE relocs.
+
+uint64_t
+Output_data_plt_x86_64_bnd::do_address_for_local(const Relobj* object,
+ unsigned int r_sym)
+{
+ // Convert the PLT offset into an APLT offset.
+ unsigned int plt_offset = ((object->local_plt_offset(r_sym) - plt_entry_size)
+ / (plt_entry_size / aplt_entry_size));
+ return (this->address()
+ + this->aplt_offset_
+ + this->regular_count() * aplt_entry_size
+ + plt_offset);
+}
+
+// Set the final size.
+void
+Output_data_plt_x86_64_bnd::set_final_data_size()
+{
+ // Number of regular and IFUNC PLT entries.
+ unsigned int count = this->entry_count();
+ // Count the first entry and the TLSDESC entry, if present.
+ unsigned int extra = this->has_tlsdesc_entry() ? 2 : 1;
+ unsigned int plt_size = (count + extra) * plt_entry_size;
+ // Offset of the APLT.
+ this->aplt_offset_ = plt_size;
+ // Size of the APLT.
+ plt_size += count * aplt_entry_size;
+ this->set_data_size(plt_size);
+}
+
+// The first entry in the BND PLT.
+
+const unsigned char
+Output_data_plt_x86_64_bnd::first_plt_entry[plt_entry_size] =
+{
+ // From AMD64 ABI Draft 0.98, page 76
+ 0xff, 0x35, // pushq contents of memory address
+ 0, 0, 0, 0, // replaced with address of .got + 8
+ 0xf2, 0xff, 0x25, // bnd jmp indirect
+ 0, 0, 0, 0, // replaced with address of .got + 16
+ 0x0f, 0x1f, 0x00 // nop
+};
+
+void
+Output_data_plt_x86_64_bnd::do_fill_first_plt_entry(
+ unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address)
+{
+ memcpy(pov, first_plt_entry, plt_entry_size);
+ // We do a jmp relative to the PC at the end of this instruction.
+ elfcpp::Swap_unaligned<32, false>::writeval(pov + 2,
+ (got_address + 8
+ - (plt_address + 6)));
+ elfcpp::Swap<32, false>::writeval(pov + 9,
+ (got_address + 16
+ - (plt_address + 13)));
+}
+
+// Subsequent entries in the BND PLT.
+
+const unsigned char
+Output_data_plt_x86_64_bnd::plt_entry[plt_entry_size] =
+{
+ // From AMD64 ABI Draft 0.99.8, page 139
+ 0x68, // pushq immediate
+ 0, 0, 0, 0, // replaced with offset into relocation table
+ 0xf2, 0xe9, // bnd jmpq relative
+ 0, 0, 0, 0, // replaced with offset to start of .plt
+ 0x0f, 0x1f, 0x44, 0, 0 // nop
+};
+
+// Entries in the BND Additional PLT.
+
+const unsigned char
+Output_data_plt_x86_64_bnd::aplt_entry[aplt_entry_size] =
+{
+ // From AMD64 ABI Draft 0.99.8, page 139
+ 0xf2, 0xff, 0x25, // bnd jmpq indirect
+ 0, 0, 0, 0, // replaced with address of symbol in .got
+ 0x90, // nop
+};
+
+unsigned int
+Output_data_plt_x86_64_bnd::do_fill_plt_entry(
+ unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr,
+ typename elfcpp::Elf_types<64>::Elf_Addr,
+ unsigned int,
+ unsigned int plt_offset,
+ unsigned int plt_index)
+{
+ memcpy(pov, plt_entry, plt_entry_size);
+ elfcpp::Swap_unaligned<32, false>::writeval(pov + 1, plt_index);
+ elfcpp::Swap<32, false>::writeval(pov + 7, -(plt_offset + 11));
+ return 0;
+}
+
+void
+Output_data_plt_x86_64_bnd::fill_aplt_entry(
+ unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address,
+ unsigned int got_offset,
+ unsigned int plt_offset,
+ unsigned int plt_index)
+{
+ // Check PC-relative offset overflow in PLT entry.
+ uint64_t plt_got_pcrel_offset = (got_address + got_offset
+ - (plt_address + plt_offset + 7));
+ if (Bits<32>::has_overflow(plt_got_pcrel_offset))
+ gold_error(_("PC-relative offset overflow in APLT entry %d"),
+ plt_index + 1);
+
+ memcpy(pov, aplt_entry, aplt_entry_size);
+ elfcpp::Swap_unaligned<32, false>::writeval(pov + 3, plt_got_pcrel_offset);
+}
+
+// The reserved TLSDESC entry in the PLT for an executable.
+
+const unsigned char
+Output_data_plt_x86_64_bnd::tlsdesc_plt_entry[plt_entry_size] =
+{
+ // From Alexandre Oliva, "Thread-Local Storage Descriptors for IA32
+ // and AMD64/EM64T", Version 0.9.4 (2005-10-10).
+ 0xff, 0x35, // pushq x(%rip)
+ 0, 0, 0, 0, // replaced with address of linkmap GOT entry (at PLTGOT + 8)
+ 0xf2, 0xff, 0x25, // jmpq *y(%rip)
+ 0, 0, 0, 0, // replaced with offset of reserved TLSDESC_GOT entry
+ 0x0f, 0x1f, 0 // nop
+};
+
+void
+Output_data_plt_x86_64_bnd::do_fill_tlsdesc_entry(
+ unsigned char* pov,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address,
+ typename elfcpp::Elf_types<64>::Elf_Addr got_base,
+ unsigned int tlsdesc_got_offset,
+ unsigned int plt_offset)
+{
+ memcpy(pov, tlsdesc_plt_entry, plt_entry_size);
+ elfcpp::Swap_unaligned<32, false>::writeval(pov + 2,
+ (got_address + 8
+ - (plt_address + plt_offset
+ + 6)));
+ elfcpp::Swap_unaligned<32, false>::writeval(pov + 9,
+ (got_base
+ + tlsdesc_got_offset
+ - (plt_address + plt_offset
+ + 13)));
+}
+
// The .eh_frame unwind information for the PLT.
template<int size>
@@ -1723,6 +2027,34 @@ Output_data_plt_x86_64_standard<size>::plt_eh_frame_fde[plt_eh_frame_fde_size] =
elfcpp::DW_CFA_nop
};
+// The .eh_frame unwind information for the BND PLT.
+const unsigned char
+Output_data_plt_x86_64_bnd::plt_eh_frame_fde[plt_eh_frame_fde_size] =
+{
+ 0, 0, 0, 0, // Replaced with offset to .plt.
+ 0, 0, 0, 0, // Replaced with size of .plt.
+ 0, // Augmentation size.
+ elfcpp::DW_CFA_def_cfa_offset, 16, // DW_CFA_def_cfa_offset: 16.
+ elfcpp::DW_CFA_advance_loc + 6, // Advance 6 to __PLT__ + 6.
+ elfcpp::DW_CFA_def_cfa_offset, 24, // DW_CFA_def_cfa_offset: 24.
+ elfcpp::DW_CFA_advance_loc + 10, // Advance 10 to __PLT__ + 16.
+ elfcpp::DW_CFA_def_cfa_expression, // DW_CFA_def_cfa_expression.
+ 11, // Block length.
+ elfcpp::DW_OP_breg7, 8, // Push %rsp + 8.
+ elfcpp::DW_OP_breg16, 0, // Push %rip.
+ elfcpp::DW_OP_lit15, // Push 0xf.
+ elfcpp::DW_OP_and, // & (%rip & 0xf).
+ elfcpp::DW_OP_lit5, // Push 5.
+ elfcpp::DW_OP_ge, // >= ((%rip & 0xf) >= 5)
+ elfcpp::DW_OP_lit3, // Push 3.
+ elfcpp::DW_OP_shl, // << (((%rip & 0xf) >= 5) << 3)
+ elfcpp::DW_OP_plus, // + ((((%rip&0xf)>=5)<<3)+%rsp+8
+ elfcpp::DW_CFA_nop, // Align to 32 bytes.
+ elfcpp::DW_CFA_nop,
+ elfcpp::DW_CFA_nop,
+ elfcpp::DW_CFA_nop
+};
+
// Write out the PLT. This uses the hand-coded instructions above,
// and adjusts them as needed. This is specified by the AMD64 ABI.
@@ -1802,6 +2134,100 @@ Output_data_plt_x86_64<size>::do_write(Output_file* of)
of->write_output_view(got_file_offset, got_size, got_view);
}
+// Write out the BND PLT.
+
+void
+Output_data_plt_x86_64_bnd::do_write(Output_file* of)
+{
+ const off_t offset = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(offset, oview_size);
+
+ Output_data_got<64, false>* got = this->got();
+ Output_data_got_plt_x86_64* got_plt = this->got_plt();
+ Output_data_space* got_irelative = this->got_irelative();
+
+ const off_t got_file_offset = got_plt->offset();
+ gold_assert(parameters->incremental_update()
+ || (got_file_offset + got_plt->data_size()
+ == got_irelative->offset()));
+ const section_size_type got_size =
+ convert_to_section_size_type(got_plt->data_size()
+ + got_irelative->data_size());
+ unsigned char* const got_view = of->get_output_view(got_file_offset,
+ got_size);
+
+ unsigned char* pov = oview;
+
+ // The base address of the .plt section.
+ typename elfcpp::Elf_types<64>::Elf_Addr plt_address = this->address();
+ // The base address of the .got section.
+ typename elfcpp::Elf_types<64>::Elf_Addr got_base = got->address();
+ // The base address of the PLT portion of the .got section,
+ // which is where the GOT pointer will point, and where the
+ // three reserved GOT entries are located.
+ typename elfcpp::Elf_types<64>::Elf_Addr got_address = got_plt->address();
+
+ this->fill_first_plt_entry(pov, got_address, plt_address);
+ pov += plt_entry_size;
+
+ // The first three entries in the GOT are reserved, and are written
+ // by Output_data_got_plt_x86_64::do_write.
+ unsigned char* got_pov = got_view + 24;
+
+ unsigned int plt_offset = plt_entry_size;
+ unsigned int got_offset = 24;
+ const unsigned int count = this->entry_count();
+ for (unsigned int plt_index = 0;
+ plt_index < count;
+ ++plt_index,
+ pov += plt_entry_size,
+ got_pov += 8,
+ plt_offset += plt_entry_size,
+ got_offset += 8)
+ {
+ // Set and adjust the PLT entry itself.
+ unsigned int lazy_offset = this->fill_plt_entry(pov,
+ got_address, plt_address,
+ got_offset, plt_offset,
+ plt_index);
+
+ // Set the entry in the GOT.
+ elfcpp::Swap<64, false>::writeval(got_pov,
+ plt_address + plt_offset + lazy_offset);
+ }
+
+ if (this->has_tlsdesc_entry())
+ {
+ // Set and adjust the reserved TLSDESC PLT entry.
+ unsigned int tlsdesc_got_offset = this->get_tlsdesc_got_offset();
+ this->fill_tlsdesc_entry(pov, got_address, plt_address, got_base,
+ tlsdesc_got_offset, plt_offset);
+ pov += this->get_plt_entry_size();
+ }
+
+ // Write the additional PLT.
+ got_offset = 24;
+ for (unsigned int plt_index = 0;
+ plt_index < count;
+ ++plt_index,
+ pov += aplt_entry_size,
+ plt_offset += aplt_entry_size,
+ got_offset += 8)
+ {
+ // Set and adjust the PLT entry itself.
+ this->fill_aplt_entry(pov, got_address, plt_address, got_offset,
+ plt_offset, plt_index);
+ }
+
+ gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
+ gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size);
+
+ of->write_output_view(offset, oview_size, oview);
+ of->write_output_view(got_file_offset, got_size, got_view);
+}
+
// Create the PLT section.
template<int size>
@@ -1831,6 +2257,62 @@ Target_x86_64<size>::make_plt_section(Symbol_table* symtab, Layout* layout)
}
}
+template<>
+Output_data_plt_x86_64<32>*
+Target_x86_64<32>::do_make_data_plt(Layout* layout,
+ Output_data_got<64, false>* got,
+ Output_data_got_plt_x86_64* got_plt,
+ Output_data_space* got_irelative)
+{
+ return new Output_data_plt_x86_64_standard<32>(layout, got, got_plt,
+ got_irelative);
+}
+
+template<>
+Output_data_plt_x86_64<64>*
+Target_x86_64<64>::do_make_data_plt(Layout* layout,
+ Output_data_got<64, false>* got,
+ Output_data_got_plt_x86_64* got_plt,
+ Output_data_space* got_irelative)
+{
+ if (parameters->options().bndplt())
+ return new Output_data_plt_x86_64_bnd(layout, got, got_plt,
+ got_irelative);
+ else
+ return new Output_data_plt_x86_64_standard<64>(layout, got, got_plt,
+ got_irelative);
+}
+
+template<>
+Output_data_plt_x86_64<32>*
+Target_x86_64<32>::do_make_data_plt(Layout* layout,
+ Output_data_got<64, false>* got,
+ Output_data_got_plt_x86_64* got_plt,
+ Output_data_space* got_irelative,
+ unsigned int plt_count)
+{
+ return new Output_data_plt_x86_64_standard<32>(layout, got, got_plt,
+ got_irelative,
+ plt_count);
+}
+
+template<>
+Output_data_plt_x86_64<64>*
+Target_x86_64<64>::do_make_data_plt(Layout* layout,
+ Output_data_got<64, false>* got,
+ Output_data_got_plt_x86_64* got_plt,
+ Output_data_space* got_irelative,
+ unsigned int plt_count)
+{
+ if (parameters->options().bndplt())
+ return new Output_data_plt_x86_64_bnd(layout, got, got_plt,
+ got_irelative, plt_count);
+ else
+ return new Output_data_plt_x86_64_standard<64>(layout, got, got_plt,
+ got_irelative,
+ plt_count);
+}
+
// Return the section for TLSDESC relocations.
template<int size>
More information about the Binutils-cvs
mailing list