1 // SPDX-License-Identifier: GPL-2.0-only
43 	unwind_init_common(&state->common);  in kunwind_init()
44 	state->task = task;  in kunwind_init()
50  * The unwind will begin at the PC within the regs.
60 	state->common.fp = regs->regs[29];  in kunwind_init_from_regs()
61 	state->common.pc = regs->pc;  in kunwind_init_from_regs()
77 	state->common.fp = (unsigned long)__builtin_frame_address(1);  in kunwind_init_from_caller()
78 	state->common.pc = (unsigned long)__builtin_return_address(0);  in kunwind_init_from_caller()
84  * The unwind will begin at the blocked tasks saved PC (i.e. the caller of
97 	state->common.fp = thread_saved_fp(task);  in kunwind_init_from_task()
98 	state->common.pc = thread_saved_pc(task);  in kunwind_init_from_task()
105 	if (state->task->ret_stack &&  in kunwind_recover_return_address()
106 	    (state->common.pc == (unsigned long)return_to_handler)) {  in kunwind_recover_return_address()
108 		orig_pc = ftrace_graph_ret_addr(state->task, NULL,  in kunwind_recover_return_address()
109 						state->common.pc,  in kunwind_recover_return_address()
110 						(void *)state->common.fp);  in kunwind_recover_return_address()
111 		if (WARN_ON_ONCE(state->common.pc == orig_pc))  in kunwind_recover_return_address()
112 			return -EINVAL;  in kunwind_recover_return_address()
113 		state->common.pc = orig_pc;  in kunwind_recover_return_address()
118 	if (is_kretprobe_trampoline(state->common.pc)) {  in kunwind_recover_return_address()
120 		orig_pc = kretprobe_find_ret_addr(state->task,  in kunwind_recover_return_address()
121 						  (void *)state->common.fp,  in kunwind_recover_return_address()
122 						  &state->kr_cur);  in kunwind_recover_return_address()
123 		state->common.pc = orig_pc;  in kunwind_recover_return_address()
140 	struct task_struct *tsk = state->task;  in kunwind_next()
141 	unsigned long fp = state->common.fp;  in kunwind_next()
145 	if (fp == (unsigned long)task_pt_regs(tsk)->stackframe)  in kunwind_next()
146 		return -ENOENT;  in kunwind_next()
148 	err = unwind_next_frame_record(&state->common);  in kunwind_next()
152 	state->common.pc = ptrauth_strip_kernel_insn_pac(state->common.pc);  in kunwind_next()
178  * Per-cpu stacks are only accessible when unwinding the current task in a
179  * non-preemptible context.
254 	return data->consume_entry(data->cookie, state->common.pc);  in arch_kunwind_consume_entry()