From: Pedro Alves <palves@redhat.com>
To: Ruslan Kabatsayev <b7.10110111@gmail.com>, gdb-patches@sourceware.org
Subject: Re: [PATCH][PR 18702] Fix wrong output of x87 registers due to truncation to double on amd64
Date: Thu, 03 Dec 2015 12:28:00 -0000 [thread overview]
Message-ID: <5660357F.4030605@redhat.com> (raw)
In-Reply-To: <564F998D.5080406@gmail.com>
On 11/20/2015 10:07 PM, Ruslan Kabatsayev wrote:
> When `info float` is used on an AMD64 system, GDB prints floating-point
> values of x87 registers with raw contents like 0x361a867a8e0527397ce0 or
> 0xc4f988454a1ddd3cfdab wrongly. This happens due to truncation to double,
> after which the former becomes 0.0, and the latter becomes negative infinity.
> This is caused by failed detection of x86-64 host, which results in setting
> gdb_host_{float,double,long_double}_format to zeros.
> This commit fixes this misdetection.
A test to make sure we don't regress this would be nice.
Maybe add something to gdb.arch/i386-float.exp ?
Thanks,
Pedro Alves
next prev parent reply other threads:[~2015-12-03 12:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-20 22:07 Ruslan Kabatsayev
2015-12-02 11:32 ` Yao Qi
2015-12-02 14:26 ` Ruslan Kabatsayev
2015-12-03 11:27 ` Yao Qi
2015-12-04 14:41 ` Ruslan Kabatsayev
2015-12-03 12:28 ` Pedro Alves [this message]
2015-12-04 15:06 ` Ruslan Kabatsayev
2015-12-04 15:11 ` Pedro Alves
2015-12-04 15:17 ` Ruslan Kabatsayev
2015-12-04 15:35 ` Pedro Alves
2015-12-04 16:09 ` Ruslan Kabatsayev
2015-12-05 22:41 ` Andrew Burgess
2015-12-06 6:30 ` Ruslan Kabatsayev
2015-12-09 12:23 ` Pedro Alves
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