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arch: arc: add the support of STACK_SENTINEL

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* 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: Wayne Ren <wei.ren@synopsys.com>
This commit is contained in:
Wayne Ren 2018-04-16 18:14:03 +08:00 • committed by Andrew Boie
commit adf6f48e0d
2 changed files with 11 additions and 2 deletions
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9
arch/arc/core/fast_irq.S
View file

@ -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
/*

4
arch/arc/core/regular_irq.S
View file

@ -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