Add the ability to hook the fault code for future use.
Signed-off-by: Neil Zhang <[email protected]>
---
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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