target/linux/ubicom32/files/arch/ubicom32/include/asm/stacktrace.h

   1 /*
   2  * arch/ubicom32/include/asm/stacktrace.h
   3  *   Stacktrace functions for the Ubicom32 architecture.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28 #ifndef _ASM_UBICOM32_STACKTRACE_H
  29 #define _ASM_UBICOM32_STACKTRACE_H
  30
  31 #define between(a, b, c)        (( \
  32                         ((unsigned long) a) >= ((unsigned long) b)) && \
  33                         (((unsigned long)a) <= ((unsigned long)c)))
  34
  35 /*
  36  * These symbols are filled in by the linker.
  37  */
  38 extern unsigned long _stext;
  39 extern unsigned long _etext;
  40
  41 /* OCM text goes from __ocm_text_run_begin to __data_begin */
  42 extern unsigned long __ocm_text_run_begin;
  43 extern unsigned long __data_begin;
  44
  45 /* Account for OCM case - see stacktrace.c maybe combine(also trap.c) */
  46 /*
  47  * ubicom32_is_kernel()
  48  *
  49  *      Check to see if the given address belongs to the kernel.
  50  * NOMMU does not permit any other means.
  51  */
  52 static inline int ubicom32_is_kernel(unsigned long addr)
  53 {
  54         int is_kernel = between(addr, &_stext, &_etext) || \
  55                         between(addr, &__ocm_text_run_begin, &__data_begin);
  56
  57 #ifdef CONFIG_MODULES
  58         if (!is_kernel)
  59                 is_kernel = is_module_address(addr);
  60 #endif
  61         return is_kernel;
  62 }
  63
  64 extern unsigned long stacktrace_iterate(
  65                                 unsigned long **trace,
  66                                 unsigned long stext, unsigned long etext,
  67                                 unsigned long ocm_stext, unsigned long ocm_etext,
  68                                 unsigned long sstack, unsigned long estack);
  69 #ifdef CONFIG_STACKTRACE
  70 void stacktrace_save_entries(struct task_struct *tsk, struct stack_trace *trace, unsigned long sp);
  71 #endif
  72 #endif /* _ASM_UBICOM32_STACKTRACE_H */