From: "K.Prasad" <prasad@linux.vnet.ibm.com>
To: linuxppc-dev@ozlabs.org
Cc: Michael Neuling <mikey@neuling.org>,
Benjamin Herrenschmidt <benh@au1.ibm.com>,
Alan Stern <stern@rowland.harvard.edu>,
paulus@samba.org, "K.Prasad" <prasad@linux.vnet.ibm.com>,
Roland McGrath <roland@redhat.com>
Subject: [Patch 5/6] Modify Data storage exception code to recognise DABR match first
Date: Mon, 25 May 2009 06:47:18 +0530 [thread overview]
Message-ID: <20090525011718.GF11078@in.ibm.com> (raw)
In-Reply-To: 20090525004730.944465878@prasadkr_t60p.in.ibm.com
Modify Data storage exception code to first lookout for a DABR match before
recognising a kprobe or xmon exception.
Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
---
arch/powerpc/mm/fault.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
Index: linux-2.6-tip.hbkpt/arch/powerpc/mm/fault.c
===================================================================
--- linux-2.6-tip.hbkpt.orig/arch/powerpc/mm/fault.c
+++ linux-2.6-tip.hbkpt/arch/powerpc/mm/fault.c
@@ -137,6 +137,12 @@ int __kprobes do_page_fault(struct pt_re
error_code &= 0x48200000;
else
is_write = error_code & DSISR_ISSTORE;
+
+ if (error_code & DSISR_DABRMATCH) {
+ /* DABR match */
+ do_dabr(regs, address, error_code);
+ return 0;
+ }
#else
is_write = error_code & ESR_DST;
#endif /* CONFIG_4xx || CONFIG_BOOKE */
@@ -151,14 +157,6 @@ int __kprobes do_page_fault(struct pt_re
if (!user_mode(regs) && (address >= TASK_SIZE))
return SIGSEGV;
-#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
- if (error_code & DSISR_DABRMATCH) {
- /* DABR match */
- do_dabr(regs, address, error_code);
- return 0;
- }
-#endif /* !(CONFIG_4xx || CONFIG_BOOKE)*/
-
if (in_atomic() || mm == NULL) {
if (!user_mode(regs))
return SIGSEGV;
next prev parent reply other threads:[~2009-05-25 1:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090525004730.944465878@prasadkr_t60p.in.ibm.com>
2009-05-25 1:14 ` [Patch 1/6] Prepare the PowerPC platform for HW Breakpoint infrastructure K.Prasad
2009-05-29 3:20 ` David Gibson
2009-05-29 9:53 ` K.Prasad
2009-05-25 1:15 ` [Patch 2/6] Introduce PPC64 specific Hardware Breakpoint interfaces K.Prasad
2009-05-29 4:18 ` David Gibson
2009-05-29 13:54 ` K.Prasad
2009-05-25 1:16 ` [Patch 3/6] Modify ptrace code to use " K.Prasad
2009-05-25 1:16 ` [Patch 4/6] Modify process and processor handling code to recognise hardware debug registers K.Prasad
2009-05-29 4:29 ` David Gibson
2009-05-25 1:17 ` K.Prasad [this message]
2009-05-25 1:17 ` [Patch 6/6] Adapt kexec and samples code to recognise PPC64 hardware breakpoint usage K.Prasad
[not found] <20090603162741.197115376@prasadkr_t60p.in.ibm.com>
2009-06-03 16:35 ` [Patch 5/6] Modify Data storage exception code to recognise DABR match first K.Prasad
[not found] <20090610090316.898961359@prasadkr_t60p.in.ibm.com>
2009-06-10 9:08 ` K.Prasad
2009-06-17 4:13 ` David Gibson
[not found] <20090726235854.574539012@prasadkr_t60p.in.ibm.com>
2009-07-27 0:18 ` K.Prasad
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