gdb and binutils branch master updated. 4b7d1f7fb496267f5ffb08effd1e18a3424eb9d8

[willnewton at sourceware dot org]

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=4b7d1f7fb496267f5ffb08effd1e18a3424eb9d8

commit 4b7d1f7fb496267f5ffb08effd1e18a3424eb9d8
Author: Will Newton <will.newton@linaro.org>
Date:   Mon Dec 16 17:45:45 2013 +0000

    gdb/elfread.c: Enable ifunc support on ARM.
    
    There are two failures in the gnu-ifunc.exp test on ARM. These are
    due to the failure to resolve the correct target function when
    attempting to breakpoint a GNU ifunc resolved function:
    
    (gdb) break gnu_ifunc
    Breakpoint 4 at gnu-indirect-function resolver at 0x2aacb5a2
    
    when gnu_ifunc has been resolved this should actually be:
    
    (gdb) break gnu_ifunc
    Breakpoint 4 at 0x868c
    
    There are two reasons for this. The first is that ARM does not have a
    separate .got.plt section so looking this up will always fail. The second
    is that the Thumb bit needs to be stripped from the address to allow
    it to be reliably compared when inserting into the ifunc cache.
    
    Tested with no regressions on arm-linux-gnueabihf and
    x86_64-unknown-linux-gnu.
    
    gdb/ChangeLog:
    
    2014-02-10  Will Newton  <will.newton@linaro.org>
    
    	* elfread.c (elf_rel_plt_read): Look for a .got section if
    	looking up .got.plt fails.
    	(elf_gnu_ifunc_resolve_by_got): Call gdbarch_addr_bits_remove
    	on address passed to elf_gnu_ifunc_record_cache.
    	(elf_gnu_ifunc_resolve_addr): Likewise.
    	(elf_gnu_ifunc_resolver_return_stop): Likewise.

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

Summary of changes:
 gdb/ChangeLog |    9 +++++++++
 gdb/elfread.c |   10 +++++++++-
 2 files changed, 18 insertions(+), 1 deletions(-)


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