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add task stack testing with ldrt to supported arm configs

This commit is contained in:
Chris Copeland 2024-04-04 02:56:20 -07:00
parent 0f29c9ae9a
commit 9ba2ebb196
Signed by: chrisnc
GPG Key ID: 14550DA72485DF30
2 changed files with 13 additions and 0 deletions
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7
arch/arm/ar/syscall.S
View File

@ -82,6 +82,13 @@
push {r4-r11}
#endif // RT_ARM_FP
#if RT_MPU_TASK_REGIONS_ENABLE
/* Force an exception if the context was just saved past the end of the task's
* stack. This may unrecoverable, as the stores have already occurred into a
* disallowed area, unless this is specifically set up as a stack guard. */
ldrt r4, [sp]
#endif // RT_MPU_TASK_REGIONS_ENABLE
// Store the stack pointer with the saved context.
mov32 r2, rt_context_prev
ldr r2, [r2]

6
arch/arm/m/syscall-v7-v8.S
View File

@ -36,6 +36,10 @@
#define controltemp r2,
#define getcontrol mrs r2, control
#define setcontrol msr control, r2
/* Force an exception if the context was just saved past the end of the task's
* stack. This may unrecoverable, as the stores have already occurred into a
* disallowed area, unless this is specifically set up as a stack guard. */
#define teststack ldrt r4, [r1]
.macro mpuconfigure
mov32 r1, rt_active_task
@ -96,6 +100,7 @@
#define getcontrol
#define setcontrol
#define mpuconfigure
#define teststack
#endif // RT_MPU_TASK_REGIONS_ENABLE
#if __ARM_ARCH == 8
@ -118,6 +123,7 @@
getcontrol
getpsplim
saveregs
teststack
// Store the new stack pointer with the saved context.
mov32 r2, rt_context_prev