arch/arm/include/asm/unwind.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/arm/include/asm/unwind.h
   4  *
   5  * Copyright (C) 2008 ARM Limited
   6  */
   7
   8 #ifndef __ASM_UNWIND_H
   9 #define __ASM_UNWIND_H
  10
  11 #ifndef __ASSEMBLY__
  12
  13 /* Unwind reason code according the the ARM EABI documents */
  14 enum unwind_reason_code {
  15         URC_OK = 0,                     /* operation completed successfully */
  16         URC_CONTINUE_UNWIND = 8,
  17         URC_FAILURE = 9                 /* unspecified failure of some kind */
  18 };
  19
  20 struct unwind_idx {
  21         unsigned long addr_offset;
  22         unsigned long insn;
  23 };
  24
  25 struct unwind_table {
  26         struct list_head list;
  27         const struct unwind_idx *start;
  28         const struct unwind_idx *origin;
  29         const struct unwind_idx *stop;
  30         unsigned long begin_addr;
  31         unsigned long end_addr;
  32 };
  33
  34 extern struct unwind_table *unwind_table_add(unsigned long start,
  35                                              unsigned long size,
  36                                              unsigned long text_addr,
  37                                              unsigned long text_size);
  38 extern void unwind_table_del(struct unwind_table *tab);
  39 extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk,
  40                              const char *loglvl);
  41
  42 #endif  /* !__ASSEMBLY__ */
  43
  44 #ifdef CONFIG_ARM_UNWIND
  45 #define UNWIND(code...)         code
  46 #else
  47 #define UNWIND(code...)
  48 #endif
  49
  50 #endif  /* __ASM_UNWIND_H */