* [PATCH 11/31] Add debugger entry points for ARC
@ 2016-01-28 19:46 ` Jeffrey Merkey
0 siblings, 0 replies; 6+ messages in thread
From: Jeffrey Merkey @ 2016-01-28 19:46 UTC (permalink / raw)
To: linux-kernel; +Cc: vgupta, linux.mdb, linux-snps-arc
This patch series adds an export which can be set by system debuggers to
direct the hard lockup and soft lockup detector to trigger a breakpoint
exception and enter a debugger if one is active. It is assumed that if
someone sets this variable, then an breakpoint handler of some sort will
be actively loaded or registered via the notify die handler chain.
This addition is extremely useful for debugging hard and soft lockups
real time and quickly from a console debugger.
Signed-off-by: Jeffrey Merkey <jeffmerkey@gmail.com>
---
arch/arc/include/asm/kdebug.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arc/include/asm/kdebug.h b/arch/arc/include/asm/kdebug.h
index 3fbe6c4..f476ed7 100644
--- a/arch/arc/include/asm/kdebug.h
+++ b/arch/arc/include/asm/kdebug.h
@@ -16,4 +16,8 @@ enum die_val {
DIE_OOPS
};
+static inline void arch_breakpoint(void)
+{
+ __asm__ __volatile__ ("trap_s 0x4\n");
+}
#endif
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 11/31] Add debugger entry points for ARC
@ 2016-01-28 19:46 ` Jeffrey Merkey
0 siblings, 0 replies; 6+ messages in thread
From: Jeffrey Merkey @ 2016-01-28 19:46 UTC (permalink / raw)
To: linux-snps-arc
This patch series adds an export which can be set by system debuggers to
direct the hard lockup and soft lockup detector to trigger a breakpoint
exception and enter a debugger if one is active. It is assumed that if
someone sets this variable, then an breakpoint handler of some sort will
be actively loaded or registered via the notify die handler chain.
This addition is extremely useful for debugging hard and soft lockups
real time and quickly from a console debugger.
Signed-off-by: Jeffrey Merkey <jeffmerkey at gmail.com>
---
arch/arc/include/asm/kdebug.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arc/include/asm/kdebug.h b/arch/arc/include/asm/kdebug.h
index 3fbe6c4..f476ed7 100644
--- a/arch/arc/include/asm/kdebug.h
+++ b/arch/arc/include/asm/kdebug.h
@@ -16,4 +16,8 @@ enum die_val {
DIE_OOPS
};
+static inline void arch_breakpoint(void)
+{
+ __asm__ __volatile__ ("trap_s 0x4\n");
+}
#endif
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 11/31] Add debugger entry points for ARC
2016-01-28 19:46 ` Jeffrey Merkey
@ 2016-02-01 9:56 ` Vineet Gupta
-1 siblings, 0 replies; 6+ messages in thread
From: Vineet Gupta @ 2016-02-01 9:56 UTC (permalink / raw)
To: Jeffrey Merkey, linux-kernel; +Cc: linux.mdb, linux-snps-arc
On Friday 29 January 2016 01:16 AM, Jeffrey Merkey wrote:
> This patch series adds an export which can be set by system debuggers to
> direct the hard lockup and soft lockup detector to trigger a breakpoint
> exception and enter a debugger if one is active. It is assumed that if
> someone sets this variable, then an breakpoint handler of some sort will
> be actively loaded or registered via the notify die handler chain.
>
> This addition is extremely useful for debugging hard and soft lockups
> real time and quickly from a console debugger.
>
> Signed-off-by: Jeffrey Merkey <jeffmerkey@gmail.com>
To reduce duplication, maybe later this could be used to replace
arch_kgdb_breakpoint()
Acked-by: Vineet Gupta <vgupta@synopsys.com>
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 11/31] Add debugger entry points for ARC
@ 2016-02-01 9:56 ` Vineet Gupta
0 siblings, 0 replies; 6+ messages in thread
From: Vineet Gupta @ 2016-02-01 9:56 UTC (permalink / raw)
To: linux-snps-arc
On Friday 29 January 2016 01:16 AM, Jeffrey Merkey wrote:
> This patch series adds an export which can be set by system debuggers to
> direct the hard lockup and soft lockup detector to trigger a breakpoint
> exception and enter a debugger if one is active. It is assumed that if
> someone sets this variable, then an breakpoint handler of some sort will
> be actively loaded or registered via the notify die handler chain.
>
> This addition is extremely useful for debugging hard and soft lockups
> real time and quickly from a console debugger.
>
> Signed-off-by: Jeffrey Merkey <jeffmerkey at gmail.com>
To reduce duplication, maybe later this could be used to replace
arch_kgdb_breakpoint()
Acked-by: Vineet Gupta <vgupta at synopsys.com>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 11/31] Add debugger entry points for ARC
2016-02-01 9:56 ` Vineet Gupta
@ 2016-02-01 16:04 ` Jeff Merkey
-1 siblings, 0 replies; 6+ messages in thread
From: Jeff Merkey @ 2016-02-01 16:04 UTC (permalink / raw)
To: Vineet Gupta; +Cc: Jeffrey Merkey, linux-kernel, linux-snps-arc
On 2/1/16, Vineet Gupta <Vineet.Gupta1@synopsys.com> wrote:
> On Friday 29 January 2016 01:16 AM, Jeffrey Merkey wrote:
>> This patch series adds an export which can be set by system debuggers to
>> direct the hard lockup and soft lockup detector to trigger a breakpoint
>> exception and enter a debugger if one is active. It is assumed that if
>> someone sets this variable, then an breakpoint handler of some sort will
>> be actively loaded or registered via the notify die handler chain.
>>
>> This addition is extremely useful for debugging hard and soft lockups
>> real time and quickly from a console debugger.
>>
>> Signed-off-by: Jeffrey Merkey <jeffmerkey@gmail.com>
>
> To reduce duplication, maybe later this could be used to replace
> arch_kgdb_breakpoint()
>
> Acked-by: Vineet Gupta <vgupta@synopsys.com>
>
You can drop this patch series, I am rethinking a better way to do this.
Jeff
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 11/31] Add debugger entry points for ARC
@ 2016-02-01 16:04 ` Jeff Merkey
0 siblings, 0 replies; 6+ messages in thread
From: Jeff Merkey @ 2016-02-01 16:04 UTC (permalink / raw)
To: linux-snps-arc
On 2/1/16, Vineet Gupta <Vineet.Gupta1@synopsys.com> wrote:
> On Friday 29 January 2016 01:16 AM, Jeffrey Merkey wrote:
>> This patch series adds an export which can be set by system debuggers to
>> direct the hard lockup and soft lockup detector to trigger a breakpoint
>> exception and enter a debugger if one is active. It is assumed that if
>> someone sets this variable, then an breakpoint handler of some sort will
>> be actively loaded or registered via the notify die handler chain.
>>
>> This addition is extremely useful for debugging hard and soft lockups
>> real time and quickly from a console debugger.
>>
>> Signed-off-by: Jeffrey Merkey <jeffmerkey at gmail.com>
>
> To reduce duplication, maybe later this could be used to replace
> arch_kgdb_breakpoint()
>
> Acked-by: Vineet Gupta <vgupta at synopsys.com>
>
You can drop this patch series, I am rethinking a better way to do this.
Jeff
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2016-02-01 16:04 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2016-01-28 19:46 [PATCH 11/31] Add debugger entry points for ARC Jeffrey Merkey
2016-01-28 19:46 ` Jeffrey Merkey
2016-02-01 9:56 ` Vineet Gupta
2016-02-01 9:56 ` Vineet Gupta
2016-02-01 16:04 ` Jeff Merkey
2016-02-01 16:04 ` Jeff Merkey
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