root/arch/um/include/asm/stacktrace.h

INCLUDED FROM

DEFINITIONS

1. get_frame_pointer
2. get_frame_pointer
3. get_stack_pointer

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_UML_STACKTRACE_H
   3 #define _ASM_UML_STACKTRACE_H
   4 
   5 #include <linux/uaccess.h>
   6 #include <linux/ptrace.h>
   7 
   8 struct stack_frame {
   9         struct stack_frame *next_frame;
  10         unsigned long return_address;
  11 };
  12 
  13 struct stacktrace_ops {
  14         void (*address)(void *data, unsigned long address, int reliable);
  15 };
  16 
  17 #ifdef CONFIG_FRAME_POINTER
  18 static inline unsigned long
  19 get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
  20 {
  21         if (!task || task == current)
  22                 return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
  23         return KSTK_EBP(task);
  24 }
  25 #else
  26 static inline unsigned long
  27 get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
  28 {
  29         return 0;
  30 }
  31 #endif
  32 
  33 static inline unsigned long
  34 *get_stack_pointer(struct task_struct *task, struct pt_regs *segv_regs)
  35 {
  36         if (!task || task == current)
  37                 return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
  38         return (unsigned long *)KSTK_ESP(task);
  39 }
  40 
  41 void dump_trace(struct task_struct *tsk, const struct stacktrace_ops *ops, void *data);
  42 
  43 #endif /* _ASM_UML_STACKTRACE_H */