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Tom Tromey a625a8c9eb Fix fixed-point regression with recent GCC
A recent version of GCC changed how fixed-point types are described.
For example, a denominator in one test case now looks like:

    GNU_denominator      (exprloc)
     [ 0] implicit_value: 16 byte block: 00 00 b8 9d 0d 69 55 a0 01 00 00 00 00 00 00 00

... the difference being that this now uses exprloc and emits a
DW_OP_implicit_value for the 16-byte block.  (DWARF 5 still uses
DW_FORM_data16.)

This change was made here:

    https://gcc.gnu.org/pipermail/gcc-patches/2020-December/560897.html

This patch updates gdb to handle this situation.

Note that, before GCC 11, this test would not give the same answer.
Earlier versions of GCC fell back to GNAT encodings for this case.

gdb/ChangeLog
2021-01-25  Tom Tromey  <tromey@adacore.com>

	* dwarf2/read.c (get_mpz): New function.
	(get_dwarf2_rational_constant): Use it.

gdb/testsuite/ChangeLog
2021-01-25  Tom Tromey  <tromey@adacore.com>

	* gdb.ada/fixed_points.exp: Add regression test.
	* gdb.ada/fixed_points/fixed_points.adb (FP5_Var): New variable.
	* gdb.ada/fixed_points/pck.adb (Delta5, FP5_Type): New.
2021-01-25 08:13:51 -07:00
bfd Automatic date update in version.in 2021-01-25 00:00:06 +00:00
binutils Minor updates to the 'how to make a release' document 2021-01-24 11:53:57 +00:00
config Implement a workaround for GNU mak jobserver 2021-01-12 05:45:44 -08:00
contrib
cpu Add Changelog entries and NEWS entries for 2.36 branch 2021-01-09 10:40:28 +00:00
elfcpp Add Changelog entries and NEWS entries for 2.36 branch 2021-01-09 10:40:28 +00:00
etc Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
gas gas: Add a testcase for PR gas/27228 2021-01-24 04:14:30 -08:00
gdb Fix fixed-point regression with recent GCC 2021-01-25 08:13:51 -07:00
gdbserver gdb: make some variables static 2021-01-20 20:55:05 -05:00
gdbsupport Improve gdb_tilde_expand logic. 2021-01-23 17:17:38 +00:00
gnulib Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gold [GOLD] powerpc assertion failure 2021-01-19 13:27:13 +10:30
gprof Regen Makefile.in for jobserver.m4 aclocal.m4 dependency 2021-01-13 22:06:02 +10:30
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libctf libctf, create: fix ctf_type_add of structs with unnamed members 2021-01-19 12:45:20 +00:00
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opcodes RISC-V: Indent and GNU coding standards tidy, also aligned the code. 2021-01-15 17:41:18 +08:00
readline Use readline's variant of Windows patch 2021-01-23 09:24:20 -07:00
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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.