[Bug ld/17453] Two issues found by AddressSanitizer

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=17453

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=65879393f04e14a9ab8797a8e66e0ec8d94108b5

commit 65879393f04e14a9ab8797a8e66e0ec8d94108b5
Author: Alan Modra <address@hidden>
Date:   Tue Oct 14 13:36:20 2014 +1030

    Avoid undefined behaviour with signed expressions

        PR 17453
    bfd/
        * libbfd.c (COERCE16, COERCE32, COERCE64): Use unsigned types.
        (EIGHT_GAZILLION): Delete.
    binutils/
        * dwarf.c (read_leb128): Avoid signed overflow.
        (read_debug_line_header): Likewise.
    gas/
        * config/tc-i386.c (fits_in_signed_long): Use unsigned param and
        expression to avoid signed overflow.
        (fits_in_signed_byte, fits_in_unsigned_byte, fits_in_unsigned_word,
        fits_in_signed_word, fits_in_unsigned_long): Similarly.
        * expr.c (operand <'-'>): Avoid signed overflow.
        * read.c (s_comm_internal): Likewise.

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

Summary of changes:
 bfd/ChangeLog        |    6 ++++++
 bfd/libbfd.c         |    7 +++----
 binutils/ChangeLog   |    6 ++++++
 binutils/dwarf.c     |    8 ++------
 gas/ChangeLog        |   10 ++++++++++
 gas/config/tc-i386.c |   25 ++++++++++++-------------
 gas/expr.c           |    3 ++-
 gas/read.c           |    2 +-
 gas/write.c          |    2 +-
 9 files changed, 43 insertions(+), 26 deletions(-)

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