LXR linux/arch/arm/include/asm/unwind.h

   1/*
   2 * arch/arm/include/asm/unwind.h
   3 *
   4 * Copyright (C) 2008 ARM Limited
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18 */
  19
  20#ifndef __ASM_UNWIND_H
  21#define __ASM_UNWIND_H
  22
  23#ifndef __ASSEMBLY__
  24
  25/* Unwind reason code according the the ARM EABI documents */
  26enum unwind_reason_code {
  27        URC_OK = 0,                     /* operation completed successfully */
  28        URC_CONTINUE_UNWIND = 8,
  29        URC_FAILURE = 9                 /* unspecified failure of some kind */
  30};
  31
  32struct unwind_idx {
  33        unsigned long addr;
  34        unsigned long insn;
  35};
  36
  37struct unwind_table {
  38        struct list_head list;
  39        struct unwind_idx *start;
  40        struct unwind_idx *stop;
  41        unsigned long begin_addr;
  42        unsigned long end_addr;
  43};
  44
  45extern struct unwind_table *unwind_table_add(unsigned long start,
  46                                             unsigned long size,
  47                                             unsigned long text_addr,
  48                                             unsigned long text_size);
  49extern void unwind_table_del(struct unwind_table *tab);
  50extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
  51
  52#ifdef CONFIG_ARM_UNWIND
  53extern int __init unwind_init(void);
  54#else
  55static inline int __init unwind_init(void)
  56{
  57        return 0;
  58}
  59#endif
  60
  61#endif  /* !__ASSEMBLY__ */
  62
  63#ifdef CONFIG_ARM_UNWIND
  64#define UNWIND(code...)         code
  65#else
  66#define UNWIND(code...)
  67#endif
  68
  69#endif  /* __ASM_UNWIND_H */
  70