gdb and binutils branch master updated. 3e87153251d9a117182decbe57dd7d9d2a47c2b3

[luisgpm at sourceware dot org]

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".

The branch, master has been updated
       via  3e87153251d9a117182decbe57dd7d9d2a47c2b3 (commit)
      from  ec48dc8bd4d90fa5c1b7cb4088fbc60a33344688 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=3e87153251d9a117182decbe57dd7d9d2a47c2b3

commit 3e87153251d9a117182decbe57dd7d9d2a47c2b3
Author: Luis Machado <lgustavo@codesourcery.com>
Date:   Fri Oct 3 08:21:33 2014 -0300

    MIPS bit field failures in gdb.base/store.exp
    
    On MIPS64 little endian, attempting an assignment to a bit field
    that lives in a register yields the wrong result. It just corrupts
    the data in the register depending on the specific position of the
    bit field inside the structure.
    
    FAIL: gdb.base/store.exp: f_1.j
    FAIL: gdb.base/store.exp: f_1.k
    FAIL: gdb.base/store.exp: F_1.i
    FAIL: gdb.base/store.exp: F_1.j
    FAIL: gdb.base/store.exp: F_1.k
    FAIL: gdb.base/store.exp: f_2.j
    FAIL: gdb.base/store.exp: f_2.k
    FAIL: gdb.base/store.exp: F_2.i
    FAIL: gdb.base/store.exp: F_2.j
    FAIL: gdb.base/store.exp: F_2.k
    FAIL: gdb.base/store.exp: f_3.j
    FAIL: gdb.base/store.exp: f_3.k
    FAIL: gdb.base/store.exp: F_3.i
    FAIL: gdb.base/store.exp: F_3.j
    FAIL: gdb.base/store.exp: F_3.k
    FAIL: gdb.base/store.exp: f_4.j
    FAIL: gdb.base/store.exp: f_4.k
    FAIL: gdb.base/store.exp: F_4.i
    FAIL: gdb.base/store.exp: F_4.j
    FAIL: gdb.base/store.exp: F_4.k
    
                    === gdb Summary ===
    
    Now, GDB knows how to do bit field assignment properly, but MIPS is
    one of those architectures that uses a hook for the register-to-value
    conversion. Although we can properly tell when the type being passed
    is a structure or union, we cannot tell when it is a bit field,
    because the bit field data lives in a value structure.  Such data
    only lives in a "type" structure when the parent structure is being
    referenced, thus you can collect them from the flds_bnds members.
    
    A bit field type structure looks pretty much the same as any other
    primitive type like int or char, so we can't distinguish them.
    Forcing more fields into the type structure wouldn't help much,
    because the type structs are shared.
    
    2014-10-03  Luis Machado  <lgustavo@codesourcery.com>
    
    	* valops.c (value_assign): Check for bit field assignments
    	before calling architecture-specific register value
    	conversion functions.

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

Summary of changes:
 gdb/ChangeLog |    6 ++++
 gdb/valops.c  |   84 +++++++++++++++++++++++++++++---------------------------
 2 files changed, 49 insertions(+), 41 deletions(-)


hooks/post-receive
-- 
gdb and binutils