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Date: Fri, 11 May 2012 20:29:00 -0000
Message-ID: <CAMe9rOqDmB1XBPBLc5QWDJka1FkuYAapGvxhazzYv2Wrf4Jo9g@mail.gmail.com>
Subject: Re: PATCH: Check DS segment register for x32 process
From: "H.J. Lu" <hjl.tools@gmail.com>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: gdb-patches@sourceware.org
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On Fri, May 11, 2012 at 1:25 PM, Mark Kettenis <mark.kettenis@xs4all.nl> wr=
ote:
>> Date: Fri, 11 May 2012 12:31:14 -0700
>> From: "H.J. Lu" <hongjiu.lu@intel.com>
>>
>> Hi,
>>
>> This patch checks DS segment register for x32 process. =A0Tested on
>> Linux/x86-64. =A0OK to install?
>>
>> Thanks.
>>
>> H.J.
>> ---
>> =A0 =A0 =A0 * amd64-linux-nat.c (AMD64_LINUX_X32_DS): New.
>> =A0 =A0 =A0 (amd64_linux_read_description): Check DS segment register for
>> =A0 =A0 =A0 x32 process.
>>
>> diff --git a/gdb/amd64-linux-nat.c b/gdb/amd64-linux-nat.c
>> index 3be8404..97c9a49 100644
>> --- a/gdb/amd64-linux-nat.c
>> +++ b/gdb/amd64-linux-nat.c
>
>> + =A0if (sizeof (void *) =3D=3D 4 && is_64bit && !is_x32)
>> + =A0 =A0error (_("Can't debug 64-bit process with 32-bit GDB"));
>
> I really think we should refuse to even build a GDB as an X32 binary.

Some x32 OSes don't have any 64bit binaries nor 64bit libraries.
32-bit x32 GDB work without any problems.

--=20
H.J.