diff options
Diffstat (limited to 'arch/arm/include/asm/stacktrace.h')
| -rw-r--r-- | arch/arm/include/asm/stacktrace.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/arm/include/asm/stacktrace.h b/arch/arm/include/asm/stacktrace.h new file mode 100644 index 000000000..36b2ff44f --- /dev/null +++ b/arch/arm/include/asm/stacktrace.h @@ -0,0 +1,53 @@ +/* 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 __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, + int (*fn)(struct stackframe *, void *), 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 */ |