1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_STACKTRACE_H 3 #define __ASM_STACKTRACE_H 4 5 #include <asm/ptrace.h> 6 #include <linux/llist.h> 7 8 struct stackframe { 9 /* 10 * FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled 11 * and R11 otherwise. 12 */ 13 unsigned long fp; 14 unsigned long sp; 15 unsigned long lr; 16 unsigned long pc; 17 #ifdef CONFIG_KRETPROBES 18 struct llist_node *kr_cur; 19 struct task_struct *tsk; 20 #endif 21 }; 22 23 static __always_inline 24 void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame) 25 { 26 frame->fp = frame_pointer(regs); 27 frame->sp = regs->ARM_sp; 28 frame->lr = regs->ARM_lr; 29 frame->pc = regs->ARM_pc; 30 #ifdef CONFIG_KRETPROBES 31 frame->kr_cur = NULL; 32 frame->tsk = current; 33 #endif 34 } 35 36 extern int unwind_frame(struct stackframe *frame); 37 extern void walk_stackframe(struct stackframe *frame, 38 int (*fn)(struct stackframe *, void *), void *data); 39 40 #endif /* __ASM_STACKTRACE_H */ 41