| | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| | 2 | #ifndef __ASM_STACKTRACE_H |
| | 3 | #define __ASM_STACKTRACE_H |
| | 4 | |
| | 5 | #include <asm/ptrace.h> |
| | 6 | #include <linux/llist.h> |
| | 7 | |
| | 8 | struct stackframe { |
| | 9 | /* |
| | 10 | * FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled |
| | 11 | * and R11 otherwise. |
| | 12 | */ |
| | 13 | unsigned long fp; |
| | 14 | unsigned long sp; |
| | 15 | unsigned long lr; |
| | 16 | unsigned long pc; |
| | 17 | |
| | 18 | /* address of the LR value on the stack */ |
| | 19 | unsigned long *lr_addr; |
| | 20 | #ifdef CONFIG_KRETPROBES |
| | 21 | struct llist_node *kr_cur; |
| | 22 | struct task_struct *tsk; |
| | 23 | #endif |
| | 24 | #ifdef CONFIG_UNWINDER_FRAME_POINTER |
| | 25 | bool ex_frame; |
| | 26 | #endif |
| | 27 | }; |
| | 28 | |
| | 29 | static inline bool on_thread_stack(void) |
| | 30 | { |
| | 31 | unsigned long delta = current_stack_pointer ^ (unsigned long)current->stack; |
| | 32 | |
| | 33 | return delta < THREAD_SIZE; |
| | 34 | } |
| | 35 | |
| | 36 | static __always_inline |
| | 37 | void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame) |
| | 38 | { |
| | 39 | frame->fp = frame_pointer(regs); |
| | 40 | frame->sp = regs->ARM_sp; |
| | 41 | frame->lr = regs->ARM_lr; |
| | 42 | frame->pc = regs->ARM_pc; |
| | 43 | #ifdef CONFIG_KRETPROBES |
| | 44 | frame->kr_cur = NULL; |
| | 45 | frame->tsk = current; |
| | 46 | #endif |
| | 47 | #ifdef CONFIG_UNWINDER_FRAME_POINTER |
| | 48 | frame->ex_frame = in_entry_text(frame->pc); |
| | 49 | #endif |
| | 50 | } |
| | 51 | |
| | 52 | extern int unwind_frame(struct stackframe *frame); |
| | 53 | extern void walk_stackframe(struct stackframe *frame, |
| | 54 | bool (*fn)(void *, unsigned long), void *data); |
| | 55 | extern void dump_mem(const char *lvl, const char *str, unsigned long bottom, |
| | 56 | unsigned long top); |
| | 57 | extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk, |
| | 58 | const char *loglvl); |
| | 59 | |
| | 60 | #endif /* __ASM_STACKTRACE_H */ |
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