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Re: [RFA] fix for intel disassembly, truncated BFD_VMA


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.


-- 
H.J.


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