linux-kernel - Re: [PATCH 2/3] Kprobes: Define retval helper

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Message-Id: <1155119298.4641.1.camel@localhost>
Date:	Wed, 09 Aug 2006 12:28:18 +0200
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	ananth@...ibm.com
Cc:	Andi Kleen <ak@...e.de>, Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org,
	Prasanna S Panchamukhi <prasanna@...ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	Jim Keniston <jkenisto@...ibm.com>, linux-arch@...r.kernel.org
Subject: Re: [PATCH 2/3] Kprobes: Define retval helper

On Wed, 2006-08-09 at 15:49 +0530, Ananth N Mavinakayanahalli wrote:
> Updated patch ...
> 
> Add the "return_value" macro that just extracts the return value given
> the pt_regs. Useful in situations such as while using function-return
> probes.

return_value definition for s390 see below.

-- 
blue skies,
  Martin.

Martin Schwidefsky
Linux for zSeries Development & Services
IBM Deutschland Entwicklung GmbH

"Reality continues to ruin my life." - Calvin.

---

diff -urpN linux-2.6.18-rc3/include/asm-s390/ptrace.h linux-2.6.18-s390/include/asm-s390/ptrace.h
--- linux-2.6.18-rc3/include/asm-s390/ptrace.h	2006-06-29 12:47:32.000000000 +0200
+++ linux-2.6.18-s390/include/asm-s390/ptrace.h	2006-08-09 12:25:23.000000000 +0200
@@ -472,6 +472,7 @@ struct user_regs_struct
 
 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
+#define return_value(regs)((regs)->gprs[2])
 #define profile_pc(regs) instruction_pointer(regs)
 extern void show_regs(struct pt_regs * regs);
 #endif


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