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Tom de Vries 8f34b74686 [gdb/symtab] Ignore DW_LNE_lo_user/DW_LNE_hi_user range
When reading an exec with a .debug_line section containing a vendor-specific
extended opcode, we get:
...
$ gdb -batch -iex "set complaints 10" dw2-vendor-extended-opcode
During symbol reading: mangled .debug_line section
...
and reading of the .debug_line section is abandoned.

The vendor-specific extended opcode should be ignored, as specified in the
DWARF standard (7.1 Vendor Extensibility).  [ FWIW, vendor-specific
standard opcodes are already ignored. ]

Fix this by ignoring all vendor-specific extended opcodes.

Build and tested on x86_64-linux.

gdb/ChangeLog:

2020-08-03  Tom de Vries  <tdevries@suse.de>

	PR symtab/26333
	* dwarf2/read.c (dwarf_decode_lines_1): Ignore
	DW_LNE_lo_user/DW_LNE_hi_user range.

gdb/testsuite/ChangeLog:

2020-08-03  Tom de Vries  <tdevries@suse.de>

	PR symtab/26333
	* lib/dwarf.exp (DW_LNE_user): New proc.
	* gdb.dwarf2/dw2-vendor-extended-opcode.c: New test.
	* gdb.dwarf2/dw2-vendor-extended-opcode.exp: New file.
2020-08-03 16:59:20 +02:00
bfd asan: alpha-vms: buffer overflow in vms_traverse_index 2020-08-03 23:18:34 +09:30
binutils Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
config Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
contrib
cpu
elfcpp
etc
gas x86: Add {disp16} pseudo prefix 2020-07-30 16:13:17 -07:00
gdb [gdb/symtab] Ignore DW_LNE_lo_user/DW_LNE_hi_user range 2020-08-03 16:59:20 +02:00
gdbserver Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
gdbsupport Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
gnulib Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
gold [GOLD] Power10 stub selection 2020-07-27 22:31:37 +09:30
gprof Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
include For DWARF v5 Dwarf Package Files (.dwp files), the section identifier encodings have changed. This patch updates dwarf2.h to contain the new encodings. (see http://dwarfstd.org/doc/DWARF5.pdf, section 7.3.5). 2020-07-29 16:33:07 +01:00
intl
ld Use xmalloc rather than malloc 2020-08-03 10:59:38 +09:30
libctf libctf: compilation failure on MinGW due to missing errno values 2020-07-26 16:11:36 -07:00
libdecnumber Run autoreconf -vf throughout 2020-07-29 16:03:55 -04:00
libiberty
opcodes x86: Add {disp16} pseudo prefix 2020-07-30 16:13:17 -07:00
readline
sim Run autoreconf -vf throughout 2020-07-29 16:03:55 -04:00
texinfo
zlib
.cvsignore
.gitattributes
.gitignore
ar-lib
ChangeLog PKG_CHECK_MODULES: Check if $pkg_cv_[]$1[]_LIBS works 2020-07-28 03:56:34 -07:00
compile
config-ml.in
config.guess
config.rpath
config.sub
configure
configure.ac
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def
Makefile.in
Makefile.tpl
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
README-maintainer-mode
setup.com
src-release.sh
symlink-tree
test-driver
ylwrap

		   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.