arch/arm/include/asm/stacktrace.h

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