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-rw-r--r--arch/arc/kernel/entry.S24
1 files changed, 15 insertions, 9 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index b908dde8a331..47d09d07f093 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -250,6 +250,14 @@ ARC_ENTRY handle_interrupt_level1
lr r0, [icause1]
and r0, r0, 0x1f
+#ifdef CONFIG_TRACE_IRQFLAGS
+ ; icause1 needs to be read early, before calling tracing, which
+ ; can clobber scratch regs, hence use of stack to stash it
+ push r0
+ TRACE_ASM_IRQ_DISABLE
+ pop r0
+#endif
+
bl.d @arch_do_IRQ
mov r1, sp
@@ -337,9 +345,9 @@ ARC_ENTRY EV_TLBProtV
; vineetg: Mar 6th: Random Seg Fault issue #1
; ecr and efa were not saved in case an Intr sneaks in
; after fake rtie
- ;
+
lr r2, [ecr]
- lr r1, [efa] ; Faulting Data address
+ lr r0, [efa] ; Faulting Data address
; --------(4) Return from CPU Exception Mode ---------
; Fake a rtie, but rtie to next label
@@ -348,6 +356,8 @@ ARC_ENTRY EV_TLBProtV
FAKE_RET_FROM_EXCPN r9
+ mov r1, sp
+
;------ (5) Type of Protection Violation? ----------
;
; ProtV Hardware Exception is triggered for Access Faults of 2 types
@@ -358,16 +368,12 @@ ARC_ENTRY EV_TLBProtV
bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f
;========= (6a) Access Violation Processing ========
- mov r0, sp ; pt_regs
bl do_page_fault
b ret_from_exception
;========== (6b) Non aligned access ============
4:
- mov r0, r1
- mov r1, sp ; pt_regs
-#ifdef CONFIG_ARC_MISALIGN_ACCESS
SAVE_CALLEE_SAVED_USER
mov r2, sp ; callee_regs
@@ -376,9 +382,6 @@ ARC_ENTRY EV_TLBProtV
; TBD: optimize - do this only if a callee reg was involved
; either a dst of emulated LD/ST or src with address-writeback
RESTORE_CALLEE_SAVED_USER
-#else
- bl do_misaligned_error
-#endif
b ret_from_exception
@@ -575,6 +578,7 @@ resume_user_mode_begin:
; --- (Slow Path #2) pending signal ---
mov r0, sp ; pt_regs for arg to do_signal()/do_notify_resume()
+ GET_CURR_THR_INFO_FLAGS r9
bbit0 r9, TIF_SIGPENDING, .Lchk_notify_resume
; Normal Trap/IRQ entry only saves Scratch (caller-saved) regs
@@ -640,6 +644,8 @@ resume_kernel_mode:
restore_regs :
+ TRACE_ASM_IRQ_ENABLE
+
lr r10, [status32]
; Restore REG File. In case multiple Events outstanding,