From: "mjw at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug tapsets/13480] ARM missing syscall.sigaltstack
Date: Sat, 17 Dec 2011 01:18:00 -0000 [thread overview]
Message-ID: <bug-13480-6586-yJnCoosDGz@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-13480-6586@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=13480
--- Comment #2 from Mark Wielaard <mjw at redhat dot com> 2011-12-17 01:07:58 UTC ---
The only entry point visible is do_sigaltstack, which unfortunately is too
generic (it would also catch some calls to sigreturn for example).
The sigaltstack syscall is defined in as:
CALL(sys_sigaltstack_wrapper)
(which has sycall number 186)
sys_sigaltstack_wrapper comes from linux/arch/arm/kernel/entry-common.S:
sys_sigaltstack_wrapper:
ldr r2, [sp, #S_OFF + S_SP]
b do_sigaltstack
ENDPROC(sys_sigaltstack_wrapper)
Unfortunately this means no dwarf is generated for this symbol, which makes it
"invisible" to stap (or at least any argument processing will be invisible
unless done by hand).
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next prev parent reply other threads:[~2011-12-17 1:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-07 15:32 [Bug tapsets/13480] New: " mjw at redhat dot com
2011-12-07 17:40 ` [Bug tapsets/13480] " dsmith at redhat dot com
2011-12-17 1:18 ` mjw at redhat dot com [this message]
2013-06-04 19:59 ` dsmith at redhat dot com
2023-10-05 1:16 ` wcohen at redhat dot com
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