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Toshihito Kikuchi bb556f1fac
Add negative repeat count to 'x' command
This change adds support for specifying a negative repeat count to
all the formats of the 'x' command to examine memory backward.
A new testcase 'examine-backward' is added to cover this new feature.

Here's the example output from the new feature:

<format 'i'>
(gdb) bt
#0  Func1 (n=42, p=0x40432e "hogehoge") at main.cpp:5
#1  0x00000000004041fa in main (argc=1, argv=0x7fffffffdff8) at main.cpp:19
(gdb) x/-4i 0x4041fa
  0x4041e5 <main(int, char**)+11>: mov   %rsi,-0x10(%rbp)
  0x4041e9 <main(int, char**)+15>: lea   0x13e(%rip),%rsi
  0x4041f0 <main(int, char**)+22>: mov   $0x2a,%edi
  0x4041f5 <main(int, char**)+27>: callq 0x404147

<format 'x'>
(gdb) x/-4xw 0x404200
0x4041f0 <main(int, char**)+22>: 0x00002abf 0xff4de800 0x76e8ffff 0xb8ffffff
(gdb) x/-4
0x4041e0 <main(int, char**)+6>:  0x7d8910ec 0x758948fc 0x358d48f0 0x0000013e

gdb/ChangeLog:

	* NEWS: Mention that GDB now supports a negative repeat count in
	the 'x' command.
	* printcmd.c (decode_format): Allow '-' in the parameter
	"string_ptr" to accept a negative repeat count.
	(find_instruction_backward): New function.
	(read_memory_backward): New function.
	(integer_is_zero): New function.
	(find_string_backward): New function.
	(do_examine): Use new functions to examine memory backward.
	(_initialize_printcmd): Mention that 'x' command supports a negative
	repeat count.

gdb/doc/ChangeLog:

	* gdb.texinfo (Examining Memory): Document negative repeat
	count in the 'x' command.

gdb/testsuite/ChangeLog:

	* gdb.base/examine-backward.c: New file.
	* gdb.base/examine-backward.exp: New file.
2016-06-09 22:50:47 -07:00
bfd Automatic date update in version.in 2016-06-10 00:00:18 +00:00
binutils Also check that the group header's sh_info field is valid. 2016-06-02 16:32:45 +01:00
config Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
cpu Correct fr30 comment 2016-03-03 12:55:30 +10:30
elfcpp Remove is_n64_ data member from Mips_relobj class. 2016-03-18 14:54:35 -07:00
etc Remove spurious empty line in changelog entry. 2016-03-18 13:09:03 +00:00
gas [AARCH64][GAS] Fix two -Wstack-usage warnings. 2016-06-09 10:08:08 +01:00
gdb Add negative repeat count to 'x' command 2016-06-09 22:50:47 -07:00
gold Fix compilation error in mips.cc with some versions of GCC. 2016-06-09 11:39:57 -07:00
gprof Regenerate configure 2016-05-09 17:24:30 +09:30
include sparc: add missing comment about hyperprivileged register operands 2016-06-09 04:37:07 -07:00
intl Regen intl/configure 2015-08-31 12:53:36 +09:30
ld Add missing ChangeLog entries 2016-06-09 16:54:58 -07:00
libdecnumber Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
libiberty Don't needlessly clear xmemdup allocated memory. 2016-05-31 20:34:47 +09:30
opcodes Print symbol names in comments for LDS/STS disassembly. 2016-06-09 19:00:57 +03:00
readline Revert "Sync readline/ to version 7.0 alpha" 2015-07-25 15:57:00 -04:00
sim Add support for FMLA (by element) to AArch64 sim. 2016-05-06 10:35:33 +01:00
texinfo
zlib Regenerate configure 2016-05-09 17:24:30 +09:30
.cvsignore
.gitattributes Add a .gitattributes file for use with git-merge-changelog 2014-07-25 18:07:23 -04:00
.gitignore Import changes made to files shared with the FSF GCC project. 2016-01-11 11:06:56 +00:00
ChangeLog Add dependencies to configure rule 2016-05-28 22:36:04 +09:30
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Sync toplevel files with GCC 2015-07-27 07:49:05 -07:00
config.guess Fix typo introduced during the most recent synchronization update. 2016-05-27 14:34:06 +01:00
config.rpath Remove freebsd1 from libtool.m4 macros and config.rpath. 2011-02-13 21:00:14 +00:00
config.sub Sync config.guess and config.sub with FSF GCC mainline versions 2016-05-23 11:42:17 +01:00
configure Add mips and s390 build targets for gold. 2016-03-17 15:37:10 -07:00
configure.ac Add mips and s390 build targets for gold. 2016-03-17 15:37:10 -07:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS 2013-01-07 Jeff Johnston <jjohnstn@redhat.com> 2013-01-07 21:39:26 +00:00
COPYING.NEWLIB 2013-10-01 Jeff Johnston <jjohnstn@redhat.com> 2013-10-01 18:14:04 +00:00
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
lt~obsolete.m4
ltgcc.m4
ltmain.sh PR target/59788 2014-02-06 11:01:57 +01:00
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS Update description of ownership of files in include/ 2014-11-04 16:14:14 -08:00
Makefile.def Sync top-level Makefile.def with GCC 2016-01-12 08:34:40 -08:00
Makefile.in Add dependencies to configure rule 2016-05-28 22:36:04 +09:30
Makefile.tpl Add dependencies to configure rule 2016-05-28 22:36:04 +09:30
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 fix gdb version parsing in src-release.sh 2016-01-17 10:01:55 +04:00
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, 
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then do:
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