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[Bug gas/29751] (%dx) is mishandled


From: cvs-commit at gcc dot gnu.org
Subject: [Bug gas/29751] (%dx) is mishandled
Date: Thu, 10 Nov 2022 18:32:50 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=29751

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=9373f27599a82ed94d9366ad59f0235085a931af

commit 9373f27599a82ed94d9366ad59f0235085a931af
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Nov 4 13:47:59 2022 -0700

    i386: Check invalid (%dx) usage

    (%dx) isn't a valid memory address in any modes.  It is used as a special
    memory operand for input/output port address in AT&T syntax and should
    only be used with input/output instructions.  Update i386_att_operand to
    set i.input_output_operand to true for (%dx) and issue an error if (%dx)
    is used with non-input/output instructions.

            PR gas/29751
            * config/tc-i386.c (_i386_insn): Add input_output_operand.
            (md_assemble): Issue an error if input/output memory operand is
            used with non-input/output instructions.
            (i386_att_operand): Set i.input_output_operand to true for
            (%dx).
            * testsuite/gas/i386/inval.l: Updated.
            * testsuite/gas/i386/x86-64-inval.l: Likewise.
            * testsuite/gas/i386/inval.s: Add tests for invalid (%dx) usage.
            * testsuite/gas/i386/x86-64-inval.s: Likewise.

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