gdb and binutils branch master updated. d7b30f6729ecf47b932b17f77123663e6a21bdd6

[sergiodj at sourceware dot org]

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d7b30f6729ecf47b932b17f77123663e6a21bdd6

commit d7b30f6729ecf47b932b17f77123663e6a21bdd6
Author: Sergio Durigan Junior <sergiodj@redhat.com>
Date:   Thu Feb 20 18:49:09 2014 -0300

    Fix for PR tdep/16397: SystemTap SDT probe support for x86 doesn't work with "triplet operands"
    
    This is the continuation of what Joel proposed on:
    
    <https://sourceware.org/ml/gdb-patches/2013-12/msg00977.html>
    
    Now that I have already submitted and pushed the patch to split
    i386_stap_parse_special_token into two smaller functions, it is indeed
    simpler to understand this patch.
    
    It occurs because, on x86, triplet displacement operands are allowed
    (like "-4+8-20(%rbp)"), and the current parser for this expression is
    buggy.  It does not correctly extract the register name from the
    expression, which leads to incorrect evaluation.  The parser was also
    being very "generous" with the expression, so I included a few more
    checks to ensure that we're indeed dealing with a triplet displacement
    operand.
    
    This patch also includes testcases for the two different kind of
    expressions that can be encountered on x86: the triplet displacement
    (explained above) and the three-argument displacement (as in
    "(%rbx,%ebx,-8)").  The tests are obviously arch-dependent and are
    placed under gdb.arch/.
    
    Message-ID: <m3mwj1j12v.fsf@redhat.com>
    URL: <https://sourceware.org/ml/gdb-patches/2014-01/msg00310.html>
    
    gdb/
    2014-02-20  Sergio Durigan Junior  <sergiodj@redhat.com>
    
    	PR tdep/16397
    	* i386-tdep.c (i386_stap_parse_special_token_triplet): Check if a
    	number comes after the + or - signs.  Adjust length of register
    	name to be extracted.
    
    gdb/testsuite/
    2014-02-20  Sergio Durigan Junior  <sergiodj@redhat.com>
    
    	PR tdep/16397
    	* gdb.arch/amd64-stap-special-operands.exp: New file.
    	* gdb.arch/amd64-stap-three-arg-disp.S: Likewise.
    	* gdb.arch/amd64-stap-three-arg-disp.c: Likewise.
    	* gdb.arch/amd64-stap-triplet.S: Likewise.
    	* gdb.arch/amd64-stap-triplet.c: Likewise.

-----------------------------------------------------------------------

Summary of changes:
 gdb/ChangeLog                                      |    7 ++
 gdb/i386-tdep.c                                    |   11 ++-
 gdb/testsuite/ChangeLog                            |    9 ++
 .../gdb.arch/amd64-stap-special-operands.exp       |   47 +++++++++++
 gdb/testsuite/gdb.arch/amd64-stap-three-arg-disp.S |   58 +++++++++++++
 gdb/testsuite/gdb.arch/amd64-stap-three-arg-disp.c |   31 +++++++
 gdb/testsuite/gdb.arch/amd64-stap-triplet.S        |   88 ++++++++++++++++++++
 gdb/testsuite/gdb.arch/amd64-stap-triplet.c        |   31 +++++++
 8 files changed, 281 insertions(+), 1 deletions(-)
 create mode 100644 gdb/testsuite/gdb.arch/amd64-stap-special-operands.exp
 create mode 100644 gdb/testsuite/gdb.arch/amd64-stap-three-arg-disp.S
 create mode 100644 gdb/testsuite/gdb.arch/amd64-stap-three-arg-disp.c
 create mode 100644 gdb/testsuite/gdb.arch/amd64-stap-triplet.S
 create mode 100644 gdb/testsuite/gdb.arch/amd64-stap-triplet.c


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