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 <linux/sched/debug.h> 21 22 #include <asm/backtrace.h> 23 #include <asm/page.h> 24 #include <hv/hypervisor.h> 25 26 /* Everything we need to keep track of a backtrace iteration */ 27 struct KBacktraceIterator { 28 BacktraceIterator it; 29 struct task_struct *task; /* task we are backtracing */ 30 int end; /* iteration complete. */ 31 int new_context; /* new context is starting */ 32 int profile; /* profiling, so stop on async intrpt */ 33 int verbose; /* printk extra info (don't want to 34 * do this for profiling) */ 35 int is_current; /* backtracing current task */ 36 }; 37 38 /* Iteration methods for kernel backtraces */ 39 40 /* 41 * Initialize a KBacktraceIterator from a task_struct, and optionally from 42 * a set of registers. If the registers are omitted, the process is 43 * assumed to be descheduled, and registers are read from the process's 44 * thread_struct and stack. "verbose" means to printk some additional 45 * information about fault handlers as we pass them on the stack. 46 */ 47 extern void KBacktraceIterator_init(struct KBacktraceIterator *kbt, 48 struct task_struct *, struct pt_regs *); 49 50 /* Initialize iterator based on current stack. */ 51 extern void KBacktraceIterator_init_current(struct KBacktraceIterator *kbt); 52 53 /* Helper method for above. */ 54 extern void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, 55 ulong pc, ulong lr, ulong sp, ulong r52); 56 57 /* No more frames? */ 58 extern int KBacktraceIterator_end(struct KBacktraceIterator *kbt); 59 60 /* Advance to the next frame. */ 61 extern void KBacktraceIterator_next(struct KBacktraceIterator *kbt); 62 63 /* Dump just the contents of the pt_regs structure. */ 64 extern void tile_show_regs(struct pt_regs *); 65 66 /* 67 * Dump stack given complete register info. Use only from the 68 * architecture-specific code; show_stack() 69 * and dump_stack() are architecture-independent entry points. 70 */ 71 extern void tile_show_stack(struct KBacktraceIterator *); 72 73 #endif /* _ASM_TILE_STACK_H */ 74