RE: [PATCH] arm64: add the ability to hook the fault code
> -Original Message- > From: Will Deacon [mailto:will.dea...@arm.com] > Sent: 2014年6月20日 16:40 > To: Neil Zhang > Cc: Catalin Marinas; linux-kernel@vger.kernel.org; > linux-arm-ker...@lists.infradead.org > Subject: Re: [PATCH] arm64: add the ability to hook the fault code > > On Fri, Jun 20, 2014 at 09:33:59AM +0100, Neil Zhang wrote: > > > > > -Original Message- > > > From: Will Deacon [mailto:will.dea...@arm.com] > > > Sent: 2014年6月20日 16:26 > > > To: Neil Zhang > > > Cc: Catalin Marinas; linux-arm-ker...@lists.infradead.org; > > > linux-kernel@vger.kernel.org > > > Subject: Re: [PATCH] arm64: add the ability to hook the fault code > > > > > > On Thu, Jun 19, 2014 at 11:54:56AM +0100, Neil Zhang wrote: > > > > Add the ability to hook the fault code for future use. > > > > > > Do you have a user for this in the kernel tree? I'd rather add the > > > hook with the first user, if it doesn't exist already. > > > > > > > Marvell Soc has a feature to use the external abort. > > I didn't submit it since it's a private feature. > > In which case, let's wait until we have a user of this in the mainline tree. > OK！ > Will Best Regards, Neil Zhang
Re: [PATCH] arm64: add the ability to hook the fault code
On Fri, Jun 20, 2014 at 09:33:59AM +0100, Neil Zhang wrote: > > > -Original Message- > > From: Will Deacon [mailto:will.dea...@arm.com] > > Sent: 2014年6月20日 16:26 > > To: Neil Zhang > > Cc: Catalin Marinas; linux-arm-ker...@lists.infradead.org; > > linux-kernel@vger.kernel.org > > Subject: Re: [PATCH] arm64: add the ability to hook the fault code > > > > On Thu, Jun 19, 2014 at 11:54:56AM +0100, Neil Zhang wrote: > > > Add the ability to hook the fault code for future use. > > > > Do you have a user for this in the kernel tree? I'd rather add the hook with > > the first user, if it doesn't exist already. > > > > Marvell Soc has a feature to use the external abort. > I didn't submit it since it's a private feature. In which case, let's wait until we have a user of this in the mainline tree. Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: [PATCH] arm64: add the ability to hook the fault code
> -Original Message- > From: Will Deacon [mailto:will.dea...@arm.com] > Sent: 2014年6月20日 16:26 > To: Neil Zhang > Cc: Catalin Marinas; linux-arm-ker...@lists.infradead.org; > linux-kernel@vger.kernel.org > Subject: Re: [PATCH] arm64: add the ability to hook the fault code > > On Thu, Jun 19, 2014 at 11:54:56AM +0100, Neil Zhang wrote: > > Add the ability to hook the fault code for future use. > > Do you have a user for this in the kernel tree? I'd rather add the hook with > the first user, if it doesn't exist already. > Marvell Soc has a feature to use the external abort. I didn't submit it since it's a private feature. > Will Best Regards, Neil Zhang
Re: [PATCH] arm64: add the ability to hook the fault code
On Thu, Jun 19, 2014 at 11:54:56AM +0100, Neil Zhang wrote: > Add the ability to hook the fault code for future use. Do you have a user for this in the kernel tree? I'd rather add the hook with the first user, if it doesn't exist already. Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] arm64: add the ability to hook the fault code
Add the ability to hook the fault code for future use.
Signed-off-by: Neil Zhang
---
arch/arm64/include/asm/system_misc.h |4
arch/arm64/mm/fault.c| 12
2 files changed, 16 insertions(+)
diff --git a/arch/arm64/include/asm/system_misc.h
b/arch/arm64/include/asm/system_misc.h
index 7a18fab..a8c19dd 100644
--- a/arch/arm64/include/asm/system_misc.h
+++ b/arch/arm64/include/asm/system_misc.h
@@ -37,6 +37,10 @@ void hook_debug_fault_code(int nr, int (*fn)(unsigned long,
unsigned int,
struct pt_regs *),
int sig, int code, const char *name);
+void hook_fault_code(int nr,
+ int (*fn)(unsigned long, unsigned int, struct pt_regs *),
+ int sig, int code, const char *name);
+
struct mm_struct;
extern void show_pte(struct mm_struct *mm, unsigned long addr);
extern void __show_regs(struct pt_regs *);
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index bcc965e..7902fb6 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -447,6 +447,18 @@ static const char *fault_name(unsigned int esr)
return inf->name;
}
+void __init hook_fault_code(int nr,
+ int (*fn)(unsigned long, unsigned int, struct pt_regs *),
+ int sig, int code, const char *name)
+{
+ BUG_ON(nr < 0 || nr >= ARRAY_SIZE(fault_info));
+
+ fault_info[nr].fn = fn;
+ fault_info[nr].sig = sig;
+ fault_info[nr].code = code;
+ fault_info[nr].name = name;
+}
+
/*
* Dispatch a data abort to the relevant handler.
*/
--
1.7.9.5
--
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