1 /* 2 * Copyright 2010 Tilera Corporation. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 11 * NON INFRINGEMENT. See the GNU General Public License for 12 * more details. 13 */ 14 15 #ifndef _ASM_TILE_STACK_H 16 #define _ASM_TILE_STACK_H 17 18 #include <linux/types.h> 19 #include <linux/sched.h> 20 #include <asm/backtrace.h> 21 #include <asm/page.h> 22 #include <hv/hypervisor.h> 23 24 /* Everything we need to keep track of a backtrace iteration */ 25 struct KBacktraceIterator { 26 BacktraceIterator it; 27 struct task_struct *task; /* task we are backtracing */ 28 pte_t *pgtable; /* page table for user space access */ 29 int end; /* iteration complete. */ 30 int new_context; /* new context is starting */ 31 int profile; /* profiling, so stop on async intrpt */ 32 int verbose; /* printk extra info (don't want to 33 * do this for profiling) */ 34 int is_current; /* backtracing current task */ 35 }; 36 37 /* Iteration methods for kernel backtraces */ 38 39 /* 40 * Initialize a KBacktraceIterator from a task_struct, and optionally from 41 * a set of registers. If the registers are omitted, the process is 42 * assumed to be descheduled, and registers are read from the process's 43 * thread_struct and stack. "verbose" means to printk some additional 44 * information about fault handlers as we pass them on the stack. 45 */ 46 extern void KBacktraceIterator_init(struct KBacktraceIterator *kbt, 47 struct task_struct *, struct pt_regs *); 48 49 /* Initialize iterator based on current stack. */ 50 extern void KBacktraceIterator_init_current(struct KBacktraceIterator *kbt); 51 52 /* Helper method for above. */ 53 extern void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, 54 ulong pc, ulong lr, ulong sp, ulong r52); 55 56 /* No more frames? */ 57 extern int KBacktraceIterator_end(struct KBacktraceIterator *kbt); 58 59 /* Advance to the next frame. */ 60 extern void KBacktraceIterator_next(struct KBacktraceIterator *kbt); 61 62 /* 63 * Dump stack given complete register info. Use only from the 64 * architecture-specific code; show_stack() 65 * and dump_stack() (in entry.S) are architecture-independent entry points. 66 */ 67 extern void tile_show_stack(struct KBacktraceIterator *, int headers); 68 69 /* Dump stack of current process, with registers to seed the backtrace. */ 70 extern void dump_stack_regs(struct pt_regs *); 71 72 /* Helper method for assembly dump_stack(). */ 73 extern void _dump_stack(int dummy, ulong pc, ulong lr, ulong sp, ulong r52); 74 75 #endif /* _ASM_TILE_STACK_H */ 76