H.J. Lu ad961eab9a gold: Support x86-64 TLS code sequences without PLT
There are extensions to x86-64 psABI:

https://groups.google.com/forum/#!topic/x86-64-abi/de5_KnLHxtI

to call tls_get_addr via GOT:

call *__tls_get_addr@GOTPCREL(%rip)

Since direct call is 4-byte long and indirect call, is 5-byte long, the
extra one byte must be handled properly.

For general dynamic model, one 0x66 prefix before call instruction is
removed to make room for indirect call.  For local dynamic model, we
simply use 5-byte indirect call.

TLS linker optimization is updated to recognize new instruction
patterns.  For local dynamic model to local exec model transition, we
generate 4 0x66 prefixes, instead of 3, before mov instruction in 64-bit
and generate a 5-byte nop, instead of 4-byte, before mov instruction in
32-bit.

	PR gold/20216
	* configure.ac (DEFAULT_TARGET_X86_64_OR_X32): New
	AM_CONDITIONAL.
	* configure: Regenerated.
	* x86_64.cc (Target_x86_64<size>::Relocate::relocate): Allow
	R_X86_64_GOTPCRELX relocation against __tls_get_addr.
	(Target_x86_64<size>::Relocate::tls_gd_to_ie): Support indirect
	call to __tls_get_addr.
	(Target_x86_64<size>::Relocate::tls_gd_to_le): Likewise.
	(Target_x86_64<size>::Relocate::tls_ld_to_le): Likewise.
	* testsuite/Makefile.am (check_PROGRAMS): Add pr20216a_test,
	pr20216b_test, pr20216c_test, pr20216d_test, pr20216e_test.
	(pr20216a_test_SOURCES): New.
	(pr20216a_test_DEPENDENCIES): Likewise.
	(pr20216a_test_CFLAGS): Likewise.
	(pr20216a_test_LDFLAGS): Likewise.
	(pr20216a_test_LDADD): Likewise.
	(pr20216b_test_SOURCES): Likewise.
	(pr20216b_test_DEPENDENCIES): Likewise.
	(pr20216b_test_CFLAGS): Likewise.
	(pr20216b_test_LDFLAGS): Likewise.
	(pr20216b_test_LDADD): Likewise.
	(pr20216c_test_SOURCES): Likewise.
	(pr20216c_test_DEPENDENCIES): Likewise.
	(pr20216c_test_CFLAGS): Likewise.
	(pr20216c_test_LDFLAGS): Likewise.
	(pr20216c_test_LDADD): Likewise.
	(pr20216d_test_SOURCES): Likewise.
	(pr20216d_test_DEPENDENCIES): Likewise.
	(pr20216d_test_CFLAGS): Likewise.
	(pr20216d_test_LDFLAGS): Likewise.
	(pr20216d_test_LDADD): Likewise.
	(pr20216e_test_SOURCES): Likewise.
	(pr20216e_test_DEPENDENCIES): Likewise.
	(pr20216e_test_CFLAGS): Likewise.
	(pr20216e_test_LDFLAGS): Likewise.
	(pr20216e_test_LDADD): Likewise.
	(pr20216a.so): Likewise.
	(pr20216b.so): Likewise.
	(pr20216_gd.o): Likewise.
	(pr20216_ld.o): Likewise.
	(MOSTLYCLEANFILES): Add pr20216a.so pr20216b.so.
	* testsuite/Makefile.in: Regenerated.
	* testsuite/pr20216_def.c: New file.
	* testsuite/pr20216_gd.S: Likewise.
	* testsuite/pr20216_ld.S: Likewise.
	* testsuite/pr20216_main.c: Likewise.
2016-06-29 08:37:42 -07:00
2016-06-29 09:09:03 +01:00
2016-06-29 20:07:14 +05:30
2016-05-09 17:24:30 +09:30
2016-05-09 17:24:30 +09:30
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2016-06-28 14:16:15 -04:00
2016-06-28 14:16:15 -04:00
2016-05-28 22:36:04 +09:30

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.
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