From: "Joseph S. Myers" <joseph@codesourcery.com>
To: Will Newton <will.newton@linaro.org>
Cc: <libc-ports@sourceware.org>, <patches@linaro.org>
Subject: Re: [PATCH] ARM: Add SystemTap probes to longjmp and setjmp.
Date: Tue, 28 Jan 2014 21:35:00 -0000 [thread overview]
Message-ID: <Pine.LNX.4.64.1401282129590.2449@digraph.polyomino.org.uk> (raw)
In-Reply-To: <1390815426-10792-1-git-send-email-will.newton@linaro.org>
On Mon, 27 Jan 2014, Will Newton wrote:
> @@ -50,6 +48,11 @@ ENTRY (__longjmp)
> ldr sp, [ip], #4
> ldr lr, [ip], #4
> #endif
> + /* longjmp probe expects longjmp first argument (4@r0), second
> + argument (-4@r1), and target address (4@r14), respectively. */
> + LIBC_PROBE (longjmp, 3, 4@r0, -4@r1, 4@r14)
The discussion on libc-alpha said this probe should be before unwinding;
shouldn't that mean before sp and lr are restored, so that at probe time
it's still possible to unwind through the caller of longjmp?
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2014-01-28 21:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 9:37 Will Newton
2014-01-27 18:22 ` Joseph S. Myers
2014-01-27 20:51 ` Will Newton
2014-01-27 22:25 ` Joseph S. Myers
2014-01-28 21:35 ` Joseph S. Myers [this message]
2014-01-28 22:03 ` Roland McGrath
2014-01-29 10:15 ` Will Newton
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