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Mike Frysinger 4d157a3dbe gdb: clean up x86 cpuid implementations
We've currently got 3 files doing open coded implementations of cpuid.
Each has its own set of workarounds and varying levels of how well
they're written and are generally hardcoded to specific cpuid functions.
If you try to build the latest gdb as a PIE on an i386 system, the build
will fail because one of them lacks PIC workarounds (wrt ebx).

Specifically, we have:
common/linux-btrace.c:
	two copies of cpuid asm w/specific args, one has no workarounds
	while the other implicitly does to avoid memcpy
go32-nat.c:
	two copies of cpuid asm w/specific args, one has workarounds to
	avoid memcpy
gdb/testsuite/gdb.arch/i386-cpuid.h:
	one general cpuid asm w/many workarounds copied from older gcc

Fortunately, that last header there is pretty damn good -- it handles
lots of edge cases, the code is nice & tight (uses gcc asm operands
rather than manual movs), and is already almost a general library type
header.  It's also the basis of what is now the public cpuid.h that is
shipped with gcc-4.3+.

So what I've done is pull that test header out and into gdb/common/
(not sure if there's a better place), synced to the version found in
gcc-4.8.0, put a wrapper API around it, and then cut over all the
existing call points to this new header.

Since the func already has support for "is cpuid supported on this proc",
it makes it trivial to push the i386/x86_64 ifdefs down into this wrapper
API too.  Now it can be safely used for all targets and gcc will elide
the unused code for us.

I've verified the gdb.arch testsuite still passes, and this code compiles
for an armv7a host as well as x86_64.  The go32-nat code has been left
ifdef-ed out until someone can test & verify the new stuff works (and if
it doesn't, figure out how to make the new code work).

URL: https://bugs.gentoo.org/467806
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-06-19 22:29:36 +00:00
bfd aarch64: Revert AArch64 ifunc changes. 2013-06-19 10:30:59 +00:00
binutils Don't align text/data/bss sections for ELF 2013-05-31 17:27:28 +00:00
config
cpu
elfcpp
etc
gas 2013-06-19 Greta Yorsh <Greta.Yorsh@arm.com> 2013-06-19 13:26:04 +00:00
gdb gdb: clean up x86 cpuid implementations 2013-06-19 22:29:36 +00:00
gold gold/ 2013-06-14 20:07:18 +00:00
gprof * aarch64.c (aarch64_find_call): Promote to bfd_vma before sign 2013-05-24 00:28:06 +00:00
include aarch64: Revert AArch64 ifunc changes. 2013-06-19 10:30:59 +00:00
intl
ld aarch64: Revert AArch64 ifunc changes. 2013-06-19 10:30:59 +00:00
libdecnumber
libiberty merge from gcc 2013-06-01 01:01:44 +00:00
opcodes 2013-06-17 Catherine Moore <clm@codesourcery.com> 2013-06-17 22:59:10 +00:00
readline readline/ 2013-05-22 09:51:49 +00:00
sim sim: bfin: stricter insn decoding 2013-06-19 03:12:26 +00:00
texinfo
.cvsignore
.gitignore
ChangeLog * gas/config/tc-avr.c: Change ISA for devices with USB support to 2013-06-01 07:14:44 +00:00
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		   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.