linux-kernel - Re: [RFC][PATCH] Demultiplexing SIGTRAP signal

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Message-ID: <20080923113001.GA12531@elte.hu>
Date:	Tue, 23 Sep 2008 13:30:01 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Srinivasa Ds <srinivasa@...ibm.com>
Cc:	Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, paulus@...ba.org,
	linuxppc-dev@...abs.org, linux-parisc@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC][PATCH] Demultiplexing SIGTRAP signal


* Ingo Molnar <mingo@...e.hu> wrote:

> > Currently a SIGTRAP can denote any one of below reasons.
> > 	- Breakpoint hit
> > 	- H/W debug register hit
> > 	- Single step
> > 	- Signal sent through kill() or rasie()
> > 
> > Architectures like powerpc/parisc provides infrastructure to 
> > demultiplex SIGTRAP signal by passing down the information for 
> > receiving SIGTRAP through si_code of siginfot_t structure. Here is an 
> > attempt is generalise this infrastructure by extending it to x86 and 
> > x86_64 archs.
> 
> applied to [the new topic] tip/core/signal, thanks Srinivasa! There 
> are some other pending x86 signal changes already, so i based 
> tip/core/signal on tip/x86/signal.

-tip testing found the following build error with the attached config:

In file included from arch/x86/mm/fault.c:41:
include/asm/traps.h: In function ‘get_si_code’:
include/asm/traps.h:41: error: ‘DR_STEP’ undeclared (first use in this function)
include/asm/traps.h:41: error: (Each undeclared identifier is reported only once
include/asm/traps.h:41: error: for each function it appears in.)
include/asm/traps.h:43: error: ‘DR_TRAP0’ undeclared (first use in this function)
include/asm/traps.h:43: error: ‘DR_TRAP1’ undeclared (first use in this function)
include/asm/traps.h:43: error: ‘DR_TRAP2’ undeclared (first use in this function)
include/asm/traps.h:43: error: ‘DR_TRAP3’ undeclared (first use in this function)

	Ingo

View attachment "config" of type "text/plain" (46118 bytes)