1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/delay.h>
33 	if (regs && !consume_entry(cookie, regs->nip))  in arch_stack_walk()
37 		sp = regs->gpr[1];  in arch_stack_walk()
41 		sp = task->thread.ksp;  in arch_stack_walk()
64  * If the task is not 'current', the caller *must* ensure the task is inactive.
79 	if (task->flags & PF_KTHREAD)  in arch_stack_walk_reliable()
80 		stack_end -= STACK_FRAME_MIN_SIZE;  in arch_stack_walk_reliable()
82 		stack_end -= STACK_USER_INT_FRAME_SIZE;  in arch_stack_walk_reliable()
87 		sp = task->thread.ksp;  in arch_stack_walk_reliable()
90 	    sp > stack_end - STACK_FRAME_MIN_SIZE) {  in arch_stack_walk_reliable()
91 		return -EINVAL;  in arch_stack_walk_reliable()
101 			return -EINVAL;  in arch_stack_walk_reliable()
106 			return -EINVAL;  in arch_stack_walk_reliable()
109 		    newsp > stack_end - STACK_FRAME_MIN_SIZE) {  in arch_stack_walk_reliable()
110 			return -EINVAL; /* invalid backlink, too far up. */  in arch_stack_walk_reliable()
122 		if (sp <= stack_end - STACK_INT_FRAME_SIZE &&  in arch_stack_walk_reliable()
124 			return -EINVAL;  in arch_stack_walk_reliable()
130 			return -EINVAL;  in arch_stack_walk_reliable()
134 		 * arch-dependent code, they are generic.  in arch_stack_walk_reliable()
144 			return -EINVAL;  in arch_stack_walk_reliable()
148 			return -EINVAL;  in arch_stack_walk_reliable()
177 				delay_us--;  in raise_backtrace_ipi()
196 			p->irq_soft_mask, p->in_mce, p->in_nmi);  in raise_backtrace_ipi()
198 		if (virt_addr_valid(p->__current))  in raise_backtrace_ipi()
199 			pr_cont(" current: %d (%s)\n", p->__current->pid,  in raise_backtrace_ipi()
200 				p->__current->comm);  in raise_backtrace_ipi()
202 			pr_cont(" current pointer corrupt? (%px)\n", p->__current);  in raise_backtrace_ipi()
204 		pr_warn("Back trace of paca->saved_r1 (0x%016llx) (possibly stale):\n", p->saved_r1);  in raise_backtrace_ipi()
205 		show_stack(p->__current, (unsigned long *)p->saved_r1, KERN_WARNING);  in raise_backtrace_ipi()