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Alan Hayward 4da037ef9d AArch64 SVE: Check for vector length change when getting gdbarch
Override the thread_architecture method, similar to SPU.  If the vector
length has changed, then find the arch using info, making sure the vector
length is passed down to the init routine.

In the init routine, ensure the arch has the correct vector length.

Example output. Program is stopped in thread 2, just before it calls prctl
to change the vector length

(gdb) info threads
  Id   Target Id                                     Frame
  1    Thread 0xffffbf6f4000 (LWP 3188) "sve_change" 0x0000ffffbf6ae130 in pthread_join ()
* 2    Thread 0xffffbf55e200 (LWP 3189) "sve_change" thread1 (arg=0xfeedface) at sve_change_size.c:28
(gdb) print $vg
$1 = 8
(gdb) print $z0.s.u
$2 = {623191333, 623191333, 623191333, 623191333, 0 <repeats 12 times>}
(gdb) n
29	  int ret = prctl(PR_SVE_SET_VL, vl/2);
(gdb) n
30	  printf ("Changed: ret\n", ret);
(gdb) print $vg
$4 = 4
(gdb) print $z0.s.u
$5 = {623191333, 623191333, 623191333, 623191333, 0, 0, 0, 0}
(gdb) thr 1
[Switching to thread 1 (Thread 0xffffbf6f4000 (LWP 3181))]
(gdb) print $vg
$6 = 8
(gdb) print $z0.s.u
$7 = {623191333, 623191333, 623191333, 623191333, 0 <repeats 12 times>}

gdb/ChangeLog:

	* aarch64-linux-nat.c
	(aarch64_linux_nat_target::thread_architecture): Add override.
	* aarch64-tdep.c (aarch64_gdbarch_init): Ensure different tdesc for
	each VQ.
2019-04-15 15:12:43 +01:00
bfd [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers 2019-04-15 12:32:01 +01:00
binutils [binutils, ARM, 1/16] Add support for Armv8.1-M Mainline CLI 2019-04-15 10:54:42 +01:00
config
contrib
cpu
elfcpp [binutils, ARM, 10/16] BFCSEL infrastructure with new global reloc R_ARM_THM_BF12 2019-04-15 12:31:34 +01:00
etc
gas [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers 2019-04-15 12:32:01 +01:00
gdb AArch64 SVE: Check for vector length change when getting gdbarch 2019-04-15 15:12:43 +01:00
gold
gprof
include [binutils, ARM, 10/16] BFCSEL infrastructure with new global reloc R_ARM_THM_BF12 2019-04-15 12:31:34 +01:00
intl
ld [binutils, ARM, 11/16] New BFCSEL instruction for Armv8.1-M Mainline 2019-04-15 12:31:42 +01:00
libdecnumber
libiberty Pull in patch for libiberty that fixes a stack exhaustion bug when demangling a pathalogically constructed mangled name. 2019-04-10 15:49:36 +01:00
opcodes [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers 2019-04-15 12:32:01 +01:00
readline
sim sim: Use host not target byte order for merging and splitting values 2019-04-13 22:21:14 +01:00
texinfo
zlib
.cvsignore
.gitattributes
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ar-lib
ChangeLog Pull in patch for libiberty that fixes a stack exhaustion bug when demangling a pathalogically constructed mangled name. 2019-04-10 15:49:36 +01:00
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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.