* ------------
* | | <- irq_stack_ptr
* top ------------
- * | elr_el1 |
+ * | x19 | <- irq_stack_ptr - 0x08
* ------------
* | x29 | <- irq_stack_ptr - 0x10
* ------------
- * | xzr |
- * ------------
- * | x19 | <- irq_stack_ptr - 0x20
- * ------------
*
- * where x19 holds a copy of the task stack pointer.
+ * where x19 holds a copy of the task stack pointer where the struct pt_regs
+ * from kernel_entry can be found.
*
*/
#define IRQ_STACK_PTR(cpu) ((unsigned long)per_cpu(irq_stack, cpu) + IRQ_STACK_START_SP)
* The offset from irq_stack_ptr where entry.S will store the original
* stack pointer. Used by unwind_frame() and dump_backtrace().
*/
-#define IRQ_STACK_TO_TASK_STACK(ptr) *((unsigned long *)(ptr - 0x20));
+#define IRQ_STACK_TO_TASK_STACK(ptr) (*((unsigned long *)((ptr) - 0x08)))
extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));