From: "Ulrich Weigand" <uweigand@de.ibm.com>
To: yao@codesourcery.com (Yao Qi)
Cc: Richard.Earnshaw@buzzard.freeserve.co.uk (Richard Earnshaw),
gdb-patches@sourceware.org, julian@codesourcery.com
Subject: Re: [patch] Fix PR tdep/12352: Handle str pc, [Rd, #imm] in displaced stepping
Date: Mon, 31 Jan 2011 15:56:00 -0000 [thread overview]
Message-ID: <201101311540.p0VFeUkM022690@d06av02.portsmouth.uk.ibm.com> (raw)
In-Reply-To: <4D45F4AC.5060009@codesourcery.com> from "Yao Qi" at Jan 31, 2011 07:30:52 AM
Yao Qi wrote.
> How about this insn sequence, which should comply with ABI?
>
> sub sp, #4
> str pc, [sp]
> ldr r4, [sp]
> add sp, #4
Why then not simply this:
e92d8000 push {pc}
e8bd0010 pop {r4}
which should do the same but still is just two instructions?
Bye,
Ulrich
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
Ulrich.Weigand@de.ibm.com
next prev parent reply other threads:[~2011-01-31 15:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-28 17:24 Yao Qi
2011-01-06 14:03 ` [Ping : patch] " Yao Qi
2011-01-19 16:17 ` [Ping 2: " Yao Qi
2011-01-22 23:44 ` [patch] " Richard Earnshaw
2011-01-24 13:22 ` Yao Qi
2011-01-31 0:31 ` Yao Qi
2011-01-31 15:56 ` Ulrich Weigand [this message]
2011-02-09 6:15 ` Yao Qi
2011-02-09 13:51 ` Ulrich Weigand
2011-02-10 6:19 ` Yao Qi
2011-02-14 14:39 ` Ulrich Weigand
2011-02-15 10:55 ` Yao Qi
2011-02-15 13:36 ` Ulrich Weigand
2011-02-15 15:57 ` Yao Qi
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