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Date: Wed, 03 Mar 2010 17:53:00 -0000
Message-ID: <6dc9ffc81003030953o3b77f457w4a2f648a96aa2534@mail.gmail.com>
Subject: Re: PATCH: Support x86 pseudo registers
From: "H.J. Lu" <hjl.tools@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: msnyder@vmware.com, gdb-patches@sourceware.org
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On Wed, Mar 3, 2010 at 9:33 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>> Date: Tue, 2 Mar 2010 14:07:41 -0800
>> From: "H.J. Lu" <hjl.tools@gmail.com>
>> Cc: Eli Zaretskii <eliz@gnu.org>, gdb-patches@sourceware.org
>>
>> >>> I presume it lets us say $ah or $ax in addition to $eax, and lets $e=
ax
>> >>> work on 64-bit systems where we really have $rax.
>> >>
>> >> Mmm hmm, and the context would be expressions or anywhere where a
>> >> register name is appropriate (eg. info reg). =A0Yes?
>> >>
>> >
>> > Yes.
>> >
>> > (top-gdb) info reg $edi
>> > edi =A0 =A0 =A0 =A0 =A0 =A00x1 =A0 =A0 =A01
>> > (top-gdb) info reg $rdi
>> > rdi =A0 =A0 =A0 =A0 =A0 =A00x1 =A0 =A0 =A01
>> > (top-gdb) info reg $dl
>> > dl =A0 =A0 =A0 =A0 =A0 =A0 0xd8 =A0 =A0 -40
>> > (top-gdb) info reg $dil
>> > dil =A0 =A0 =A0 =A0 =A0 =A00x1 =A0 =A0 =A01
>> > (top-gdb)
>> >
>> >
>>
>> Basically, you can access any byte/word/dword registers, as shown
>> in assembly code, the same way as word/dword registers.
>
> Then how about this entry:
>
> =A0* X86 general purpose registers
>
> =A0 GDB now supports reading/writing byte, word and double-word x86
> =A0 general purpose registers directly. =A0This means you can use, say,
> =A0 $ah or $ax to refer, respectively, to the byte register AH and
> =A0 16-bit word register AX that are actually portions of the 32-bit
> =A0 register EAX or 64-bit register RAX.
>
>

It looks good to me.

Thanks.


--=20
H.J.