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 18 /* address of the LR value on the stack */ 19 unsigned long *lr_addr; 20 #ifdef CONFIG_KRETPROBES 21 struct llist_node *kr_cur; 22 struct task_struct *tsk; 23 #endif 24 }; 25 26 static __always_inline 27 void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame) 28 { 29 frame->fp = frame_pointer(regs); 30 frame->sp = regs->ARM_sp; 31 frame->lr = regs->ARM_lr; 32 frame->pc = regs->ARM_pc; 33 #ifdef CONFIG_KRETPROBES 34 frame->kr_cur = NULL; 35 frame->tsk = current; 36 #endif 37 } 38 39 extern int unwind_frame(struct stackframe *frame); 40 extern void walk_stackframe(struct stackframe *frame, 41 int (*fn)(struct stackframe *, void *), void *data); 42 extern void dump_mem(const char *lvl, const char *str, unsigned long bottom, 43 unsigned long top); 44 45 #endif /* __ASM_STACKTRACE_H */ 46