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 int end; /* iteration complete. */ 29 int new_context; /* new context is starting */ 30 int profile; /* profiling, so stop on async intrpt */ 31 int verbose; /* printk extra info (don't want to 32 * do this for profiling) */ 33 int is_current; /* backtracing current task */ 34 }; 35 36 /* Iteration methods for kernel backtraces */ 37 38 /* 39 * Initialize a KBacktraceIterator from a task_struct, and optionally from 40 * a set of registers. If the registers are omitted, the process is 41 * assumed to be descheduled, and registers are read from the process's 42 * thread_struct and stack. "verbose" means to printk some additional 43 * information about fault handlers as we pass them on the stack. 44 */ 45 extern void KBacktraceIterator_init(struct KBacktraceIterator *kbt, 46 struct task_struct *, struct pt_regs *); 47 48 /* Initialize iterator based on current stack. */ 49 extern void KBacktraceIterator_init_current(struct KBacktraceIterator *kbt); 50 51 /* Helper method for above. */ 52 extern void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, 53 ulong pc, ulong lr, ulong sp, ulong r52); 54 55 /* No more frames? */ 56 extern int KBacktraceIterator_end(struct KBacktraceIterator *kbt); 57 58 /* Advance to the next frame. */ 59 extern void KBacktraceIterator_next(struct KBacktraceIterator *kbt); 60 61 /* 62 * Dump stack given complete register info. Use only from the 63 * architecture-specific code; show_stack() 64 * and dump_stack() (in entry.S) are architecture-independent entry points. 65 */ 66 extern void tile_show_stack(struct KBacktraceIterator *, int headers); 67 68 /* Dump stack of current process, with registers to seed the backtrace. */ 69 extern void dump_stack_regs(struct pt_regs *); 70 71 /* Helper method for assembly dump_stack(). */ 72 extern void _dump_stack(int dummy, ulong pc, ulong lr, ulong sp, ulong r52); 73 74 #endif /* _ASM_TILE_STACK_H */ 75