| 1 |
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| 2 | #ifndef __ASM_STACKTRACE_H
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| 3 | #define __ASM_STACKTRACE_H
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| 4 |
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| 5 | #include <linux/llist.h>
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| 6 | #include <asm/ptrace.h>
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| 7 | #include <asm/sections.h>
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| 8 |
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| 9 | struct stackframe {
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| 10 | |
| 11 | * FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled
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| 12 | * and R11 otherwise.
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| 13 |
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| 14 | unsigned long fp;
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| 15 | unsigned long sp;
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| 16 | unsigned long lr;
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| 17 | unsigned long pc;
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| 18 |
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| 19 |
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| 20 | unsigned long *lr_addr;
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| 21 | #ifdef CONFIG_KRETPROBES
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| 22 | struct llist_node *kr_cur;
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| 23 | struct task_struct *tsk;
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| 24 | #endif
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| 25 | #ifdef CONFIG_UNWINDER_FRAME_POINTER
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| 26 | bool ex_frame;
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| 27 | #endif
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| 28 | };
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| 29 |
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| 30 | static inline bool on_thread_stack(void)
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| 31 | {
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| 32 | unsigned long delta = current_stack_pointer ^ (unsigned long)current->stack;
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| 33 |
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| 34 | return delta < THREAD_SIZE;
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| 35 | }
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| 36 |
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| 37 | static __always_inline
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| 38 | void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
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| 39 | {
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| 40 | frame->fp = frame_pointer(regs);
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| 41 | frame->sp = regs->ARM_sp;
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| 42 | frame->lr = regs->ARM_lr;
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| 43 | frame->pc = regs->ARM_pc;
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| 44 | #ifdef CONFIG_KRETPROBES
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| 45 | frame->kr_cur = NULL;
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| 46 | frame->tsk = current;
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| 47 | #endif
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| 48 | #ifdef CONFIG_UNWINDER_FRAME_POINTER
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| 49 | frame->ex_frame = in_entry_text(frame->pc);
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| 50 | #endif
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| 51 | }
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| 52 |
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| 53 | extern int unwind_frame(struct stackframe *frame);
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| 54 | extern void walk_stackframe(struct stackframe *frame,
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| 55 | bool (*fn)(void *, unsigned long), void *data);
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| 56 | extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
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| 57 | unsigned long top);
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| 58 | extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
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| 59 | const char *loglvl);
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| 60 |
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| 61 | #endif
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