arch/riscv/include/asm/stacktrace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef _ASM_RISCV_STACKTRACE_H
   4 #define _ASM_RISCV_STACKTRACE_H
   5
   6 #include <linux/sched.h>
   7 #include <asm/ptrace.h>
   8
   9 struct stackframe {
  10         unsigned long fp;
  11         unsigned long ra;
  12 };
  13
  14 extern void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
  15                                     bool (*fn)(void *, unsigned long), void *arg);
  16 extern void dump_backtrace(struct pt_regs *regs, struct task_struct *task,
  17                            const char *loglvl);
  18
  19 static inline bool on_thread_stack(void)
  20 {
  21         return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
  22 }
  23
  24
  25 #ifdef CONFIG_VMAP_STACK
  26 DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack);
  27 #endif /* CONFIG_VMAP_STACK */
  28
  29 #endif /* _ASM_RISCV_STACKTRACE_H */