Commit adf6f48e authored by Wayne Ren's avatar Wayne Ren Committed by Andrew Boie
Browse files

arch: arc: add the support of STACK_SENTINEL 



* call the _check_stack_sentinel in unnested isr
return.

* for firq, _check_stack_sentinel is called in kernel
  isr stack because the limitation of banked register

* for normal irq, _check_stak_sentinel is called in
  the interruptted thread stack

Signed-off-by: default avatarWayne Ren <wei.ren@synopsys.com>
parent 8da51ee3

arch/arc/core/fast_irq.S

+7 −2
Original line number Diff line number Diff line
@@ -123,8 +123,6 @@ firq_nest: 


SECTION_FUNC(TEXT, _firq_exit)



	pop sp



#if CONFIG_RGF_NUM_BANKS != 1

#ifndef CONFIG_FIRQ_NO_LPCC

	/* restore lp_count, lp_start, lp_end from r23-r25 */
@@ -142,6 +140,10 @@ SECTION_FUNC(TEXT, _firq_exit) 
	bne.d	_firq_no_reschedule

	st	r0, [r1]



#ifdef CONFIG_STACK_SENTINEL

	bl _check_stack_sentinel

#endif



#ifdef CONFIG_PREEMPT_ENABLED



	mov_s r1, _kernel
@@ -164,6 +166,8 @@ SECTION_FUNC(TEXT, _firq_exit) 


.balign 4

_firq_no_reschedule:

	pop sp



	/*

	 * Keeping this code block close to those that use it allows using brxx

	 * instruction instead of a pair of cmp and bxx
@@ -207,6 +211,7 @@ _firq_no_reschedule: 


.balign 4

_firq_reschedule:

	pop sp



#if CONFIG_RGF_NUM_BANKS != 1

	/*

arch/arc/core/regular_irq.S

+4 −0
Original line number Diff line number Diff line
@@ -95,6 +95,10 @@ SECTION_FUNC(TEXT, _rirq_exit) 
	bne.d	_rirq_return_from_rirq

	st	r0, [r1]



#ifdef CONFIG_STACK_SENTINEL

	bl _check_stack_sentinel

#endif



#ifdef CONFIG_PREEMPT_ENABLED



	mov r1, _kernel

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