On a sync exception more useful information can be printed than we
currently do. Pass the ESR and FAR value to do_sync and print the
reason for the exception along with the address that actually faulted.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/arm/cpu/exceptions_64.S | 4 ++++
arch/arm/cpu/interrupts_64.c | 4 ++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/exceptions_64.S b/arch/arm/cpu/exceptions_64.S
index 58ca50b709..22034eaef9 100644
--- a/arch/arm/cpu/exceptions_64.S
+++ b/arch/arm/cpu/exceptions_64.S
@@ -35,12 +35,15 @@
switch_el x11, 3f, 2f, 1f
3: mrs x1, esr_el3
mrs x2, elr_el3
+ mrs x3, far_el3
b 0f
2: mrs x1, esr_el2
mrs x2, elr_el2
+ mrs x3, far_el2
b 0f
1: mrs x1, esr_el1
mrs x2, elr_el1
+ mrs x3, far_el1
0:
stp x2, x0, [sp, #-16]!
mov x0, sp
@@ -99,6 +102,7 @@ _do_bad_error:
_do_sync:
exception_entry
+ mov x2, x3
bl do_sync
b exception_exit
diff --git a/arch/arm/cpu/interrupts_64.c b/arch/arm/cpu/interrupts_64.c
index c32cd4f051..ee3dc3380b 100644
--- a/arch/arm/cpu/interrupts_64.c
+++ b/arch/arm/cpu/interrupts_64.c
@@ -143,9 +143,9 @@ void do_bad_error(struct pt_regs *pt_regs)
do_exception(pt_regs);
}
-void do_sync(struct pt_regs *pt_regs)
+void do_sync(struct pt_regs *pt_regs, unsigned int esr, unsigned long far)
{
- printf("sync exception\n");
+ printf("%s exception at 0x%016lx\n", esr_get_class_string(esr), far);
do_exception(pt_regs);
}
--
2.16.1
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