| 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 */ |
| 73 | |
