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Hans-Peter Nilsson 555a578963 mmix ld: move .init (and _init) first.
This both makes the section layout more similar to that of the general
default for ELF and fixes (makes true) an assumption that code and
rodata is located between _init and __etext, in
libgcc/config/mmix/crti.S.  Sadly, that's not actually true for ELF
(generally and for elf64mmix), where exception-tables and .rodata is
after _etext; I'm pondering what to do about that.

The original mmix simulator behavior is that memory magically appears
on access, initialized with 0, which is not preferable when chasing
bugs by throwing code the size of the gcc test-suite to the simulator.
The code in crti.S compatibly enables simulator machinery to identify
undefined memory and instead stopping the simulator with an error
(going to interactive mode for interactive runs).  See
http://gcc.gnu.org/legacy-ml/gcc-patches/2012-10/msg01871.html for
more, including the mmix-sim.ch "patch file".

This fixes only one error in the gcc testsuite,
gcc.c-torture/execute/pr20621-1.c with LTO, where for some reason
gcc/lto chooses to move (writable) data that is only used to read 0 to
.rodata.  An access (sufficiently far inside a block) in an
unregistered place is flagged as an invalid access.

The bpo-9m test that I had to adjust, actually exposes a wart: mmo
does not have the notion of symbol types (or sections) and the
test-case now has leading zeros at "Main" eventually leading to it
being misdiagnosed as being outside .text and .data, thus here mapped
to BFD as an absolute symbol.  The test is not intended to check the
mmo symbol-type machinery, so I'm just tweaking it to be
symbol-type-neutral for "Main".

Since you have to jump through hoops to see the problem, I don't think
this commit is worth putting on the 2.35-branch.

ld:
	* scripttempt/mmo.sc: Move .init first in .text output section.
	* testsuite/ld-mmix/bpo-9m.d: Adjust accordingly.
2020-07-17 00:56:17 +02:00
bfd Automatic date update in version.in 2020-07-16 00:00:06 +00:00
binutils arc: Detect usage of illegal double register pairs 2020-07-14 14:51:15 +03:00
config
contrib
cpu
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gas x86: Don't display eiz with no scale 2020-07-15 06:57:47 -07:00
gdb Fix POSIX-isms in gdb.base/shell.exp 2020-07-16 14:03:09 -07:00
gdbserver gdbserver: fix memory leak when handling qsupported packet 2020-07-13 22:27:01 -04:00
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gnulib
gold Commit: Fix GOLD testsuite failures for 2.35 branch. 2020-07-08 11:08:05 +01:00
gprof Update Turkish translation in the gprof sub-directory 2020-07-09 14:25:11 +01:00
include x86: Support GNU_PROPERTY_X86_FEATURE_2_TMM 2020-07-11 04:04:20 -07:00
intl
ld mmix ld: move .init (and _init) first. 2020-07-17 00:56:17 +02:00
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opcodes x86: Don't display eiz with no scale 2020-07-15 06:57:47 -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.