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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_STACKTRACE_H
#define __ASM_STACKTRACE_H
#include <asm/ptrace.h>
#include <linux/llist.h>
struct stackframe {
/*
* FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled
* and R11 otherwise.
*/
unsigned long fp;
unsigned long sp;
unsigned long lr;
unsigned long pc;
/* address of the LR value on the stack */
unsigned long *lr_addr;
#ifdef CONFIG_KRETPROBES
struct llist_node *kr_cur;
struct task_struct *tsk;
#endif
#ifdef CONFIG_UNWINDER_FRAME_POINTER
bool ex_frame;
#endif
};
static inline bool on_thread_stack(void)
{
unsigned long delta = current_stack_pointer ^ (unsigned long)current->stack;
return delta < THREAD_SIZE;
}
static __always_inline
void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
{
frame->fp = frame_pointer(regs);
frame->sp = regs->ARM_sp;
frame->lr = regs->ARM_lr;
frame->pc = regs->ARM_pc;
#ifdef CONFIG_KRETPROBES
frame->kr_cur = NULL;
frame->tsk = current;
#endif
#ifdef CONFIG_UNWINDER_FRAME_POINTER
frame->ex_frame = in_entry_text(frame->pc);
#endif
}
extern int unwind_frame(struct stackframe *frame);
extern void walk_stackframe(struct stackframe *frame,
bool (*fn)(void *, unsigned long), void *data);
extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
unsigned long top);
extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
const char *loglvl);
#endif /* __ASM_STACKTRACE_H */
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