Linux Kernel  3.7.1
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stack.h
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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 */
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. */
50 
51 /* Helper method for above. */
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 */