binutils-gdb modified for the FreeChainXenon project
Find a file
Maciej W. Rozycki 4e6ff0e1b8 MIPS/Linux/native: Supply $zero for the !PTRACE_GETREGS case
With native MIPS/Linux targets the $zero register is inaccessible, with
its supposed context slot provided by the OS occupied by the $restart
register.  The PTRACE_GETREGS path takes care of it by artificially
supplying the hardwired contents of $zero in `mips_supply_gregset' or
`mips64_supply_gregset', as applicable, however the PTRACE_PEEKUSER
fallback does not, making the register unavailable, e.g.:

(gdb) info registers
         zero       at       v0       v1       a0       a1       a2       a3
R0    <unavl> 00000001 00000001 d2f1a9fc 00000000 00000000 00417158 00417150
           t0       t1       t2       t3       t4       t5       t6       t7
R8   00000004 00000000 fffffff8 00000000 00000000 00000000 00000001 00000007
           s0       s1       s2       s3       s4       s5       s6       s7
R16  00000000 00405e30 00000000 00500000 00000000 0052ec08 00000000 00000000
           t8       t9       k0       k1       gp       sp       s8       ra
R24  00000000 00417008 00000000 00000000 0041e220 7fff4ce0 7fff4ce0 00405d0c
       status       lo       hi badvaddr    cause       pc
      <unavl> 00441cf1 00000017 00417004 00800024 00405d10
         fcsr      fir  restart
     00800000 00f30000 00000000
(gdb)

or (under certain circumstances):

(gdb) stepi
Register 0 is not available
(gdb)

This is specifically because `mips_linux_register_addr' and
`mips64_linux_register_addr', both correctly return -1 for
MIPS_ZERO_REGNUM, and therefore `linux_nat_trad_target::fetch_registers'
faithfully marks this register as unavailable.

Supply this register artificially then in the PTRACE_PEEKUSER case as
well, correcting this issue.

	gdb/
	* mips-linux-nat.c (mips_linux_nat_target::fetch_registers):
	Supply the MIPS_ZERO_REGNUM register.
2018-05-15 16:26:07 +01:00
bfd Fix uninitialised memory acccess in COFF bfd backend 2018-05-15 12:33:42 +00:00
binutils Recognize more targets as ELF for testing 2018-05-15 21:04:13 +09:30
config config: Sync with GCC 2018-04-05 15:22:13 -07:00
cpu PR22069, Several instances of register accidentally spelled as regsiter 2018-05-09 15:55:28 +09:30
elfcpp PowerPC inline PLT call support 2018-04-09 17:25:20 +09:30
etc Update year range in copyright notice of binutils files 2018-01-03 17:49:56 +10:30
gas Stop generating GNU build notes for linkonce sections. 2018-05-14 15:32:43 +01:00
gdb MIPS/Linux/native: Supply $zero for the !PTRACE_GETREGS case 2018-05-15 16:26:07 +01:00
gold Fix _GLOBAL_OFFSET_TABLE_ value for large GOTs (aarch64). 2018-05-10 00:13:33 -07:00
gprof Updated Spanish translation for gprof directory 2018-04-18 12:02:17 +01:00
include Fix error messages in the NFP sources when building for 32-bit targets. 2018-05-15 13:28:06 +01:00
intl Require ngettext in test of system gettext implementation 2017-11-07 15:56:44 +10:30
ld Restore LDFLAGS in notes.exp 2018-05-15 21:04:37 +09:30
libdecnumber Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
libiberty Resync libiberty sources with master version in GCC repository. 2018-04-17 13:53:38 +01:00
opcodes Fix error messages in the NFP sources when building for 32-bit targets. 2018-05-15 13:28:06 +01:00
readline Avoid MinGW compilation warning in readline/input.c 2017-05-19 11:05:59 +03:00
sim PR22069, Several instances of register accidentally spelled as regsiter 2018-05-09 15:55:28 +09:30
texinfo
zlib Sync ZLIB with FSF GCC sources, bringing in version 1.2.11. 2017-02-20 12:52:22 +00:00
.cvsignore
.gitattributes Add a .gitattributes file for use with git-merge-changelog 2014-07-25 18:07:23 -04:00
.gitignore Add archives and make stamps to the .gitignore file. 2016-09-27 15:10:42 +01:00
ChangeLog Bring in support for the NFP target in the config.sub file. 2018-05-01 16:35:04 +01:00
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess Bring in support for the NFP target in the config.sub file. 2018-05-01 16:35:04 +01:00
config.rpath
config.sub Bring in support for the NFP target in the config.sub file. 2018-05-01 16:35:04 +01:00
configure Add the Netronome Flow Processor as a build target to the top-level configure.ac file. 2018-05-01 16:23:21 +01:00
configure.ac Add the Netronome Flow Processor as a build target to the top-level configure.ac file. 2018-05-01 16:23:21 +01:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
COPYING.NEWLIB
COPYING3
COPYING3.LIB
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat
install-sh Update from upstream Automake 2014-11-16 13:43:48 +01:00
libtool.m4 Sync top-level btool.m4 with GCC 2016-01-12 08:44:52 -08:00
ltgcc.m4
ltmain.sh PR target/59788 2014-02-06 11:01:57 +01:00
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS Update description of ownership of files in include/ 2014-11-04 16:14:14 -08:00
Makefile.def Sync top-level make and configure files with FSF GCC mainline versions. 2017-01-23 11:55:48 +00:00
Makefile.in Sync top-level make and configure files with FSF GCC mainline versions. 2017-01-23 11:55:48 +00:00
Makefile.tpl Sync top-level make and configure files with FSF GCC mainline versions. 2017-01-23 11:55:48 +00:00
makefile.vms
missing Update from upstream Automake 2014-11-16 13:43:48 +01:00
mkdep
mkinstalldirs Update from upstream Automake 2014-11-16 13:43:48 +01:00
move-if-change Update `move-if-change' from gnulib 2014-11-16 17:04:02 +01:00
README
README-maintainer-mode
setup.com
src-release.sh Improve junk file removal in source tarball creation script. 2018-01-30 17:48:24 +00:00
symlink-tree
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

		   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.