1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _ASM_UML_STACKTRACE_H
3*4882a593Smuzhiyun #define _ASM_UML_STACKTRACE_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/uaccess.h>
6*4882a593Smuzhiyun #include <linux/ptrace.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun struct stack_frame {
9*4882a593Smuzhiyun struct stack_frame *next_frame;
10*4882a593Smuzhiyun unsigned long return_address;
11*4882a593Smuzhiyun };
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun struct stacktrace_ops {
14*4882a593Smuzhiyun void (*address)(void *data, unsigned long address, int reliable);
15*4882a593Smuzhiyun };
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #ifdef CONFIG_FRAME_POINTER
18*4882a593Smuzhiyun static inline unsigned long
get_frame_pointer(struct task_struct * task,struct pt_regs * segv_regs)19*4882a593Smuzhiyun get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun if (!task || task == current)
22*4882a593Smuzhiyun return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
23*4882a593Smuzhiyun return KSTK_EBP(task);
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun #else
26*4882a593Smuzhiyun static inline unsigned long
get_frame_pointer(struct task_struct * task,struct pt_regs * segv_regs)27*4882a593Smuzhiyun get_frame_pointer(struct task_struct *task, struct pt_regs *segv_regs)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun return 0;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun #endif
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun static inline unsigned long
get_stack_pointer(struct task_struct * task,struct pt_regs * segv_regs)34*4882a593Smuzhiyun *get_stack_pointer(struct task_struct *task, struct pt_regs *segv_regs)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun if (!task || task == current)
37*4882a593Smuzhiyun return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
38*4882a593Smuzhiyun return (unsigned long *)KSTK_ESP(task);
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun void dump_trace(struct task_struct *tsk, const struct stacktrace_ops *ops, void *data);
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun #endif /* _ASM_UML_STACKTRACE_H */
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