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[Bug uprobes/10836] uprobes-provided pt_regs* are unreliable
- From: "roland at gnu dot org" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 27 Oct 2009 18:40:13 -0000
- Subject: [Bug uprobes/10836] uprobes-provided pt_regs* are unreliable
- References: <20091023162529.10836.fche@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From roland at gnu dot org 2009-10-27 18:40 -------
"synthesized pt_regs" is a loony concept considered only by systemtap.
It has no place in the general utrace world. user_regset is there, it's what
should be used. The only reason pt_regs is passed into some callbacks is
because the pointer is handy and in some circumstances a few of its fields might
be sufficiently useful for particular code that knows exactly what it is looking
at. General-case code can use the asm/syscall.h macros on it, for example. For
any generalized register access, user_regset is the only right thing to use.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10836
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