[RFA] fix for intel disassembly, truncated BFD_VMA
H.J. Lu
hjl.tools@gmail.com
Tue Feb 16 00:07:00 GMT 2016
On Wed, Feb 9, 2011 at 10:43 AM, Michael Snyder <msnyder@vmware.com> wrote:
> H.J. Lu wrote:
>>
>> On Wed, Feb 9, 2011 at 10:36 AM, Michael Snyder <msnyder@vmware.com>
>> wrote:
>>>
>>> This expression needed parentheses. Without them, it was truncating the
>>> target address of jumps and calls from BFD_VMA to 32-bits.
>>>
>>> Disassembly at high addresses is vastly improved.
>>>
>>>
>>> 2011-02-09 Michael Snyder <msnyder@vmware.com>
>>>
>>> * i386-dis.c (OP_J): Parenthesize expression to prevent
>>> truncated addresses.
>>> (print_insn): Fix indentation off-by-one.
>>>
>>> Index: i386-dis.c
>>> ===================================================================
>>> RCS file: /cvs/src/src/opcodes/i386-dis.c,v
>>> retrieving revision 1.257
>>> diff -u -p -u -p -r1.257 i386-dis.c
>>> --- i386-dis.c 18 Jan 2011 17:08:13 -0000 1.257
>>> +++ i386-dis.c 9 Feb 2011 18:28:02 -0000
>>> @@ -1,6 +1,6 @@
>>> /* Print i386 instructions for GDB, the GNU debugger.
>>> Copyright 1988, 1989, 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
>>> - 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
>>> + 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
>>> Free Software Foundation, Inc.
>>>
>>> This file is part of the GNU opcodes library.
>>> @@ -11702,9 +11702,9 @@ print_insn (bfd_vma pc, disassemble_info
>>> modrm.rm = *codep & 7;
>>> }
>>>
>>> - need_vex = 0;
>>> - need_vex_reg = 0;
>>> - vex_w_done = 0;
>>> + need_vex = 0;
>>> + need_vex_reg = 0;
>>> + vex_w_done = 0;
>>>
>>> if (dp->name == NULL && dp->op[0].bytemode == FLOATCODE)
>>> {
>>> @@ -13817,7 +13817,7 @@ OP_J (int bytemode, int sizeflag)
>>> oappend (INTERNAL_DISASSEMBLER_ERROR);
>>> return;
>>> }
>>> - disp = ((start_pc + codep - start_codep + disp) & mask) | segment;
>>> + disp = ((start_pc + (codep - start_codep) + disp) & mask) | segment;
>>> set_op (disp, 0);
>>> print_operand_value (scratchbuf, 1, disp);
>>> oappend (scratchbuf);
>>>
>>>
>>
>> OK.
>
>
> Thanks, committed.
I got a hit with a similar case. I checked this patch into trunk
and 2.26 branch.
--
H.J.
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