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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> | |
76c567fb | 21 | #include <asm/page.h> |
867e359b CM |
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 */ | |
867e359b CM |
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 | ||
0707ad30 CM |
51 | /* Helper method for above. */ |
52 | extern void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt, | |
53 | ulong pc, ulong lr, ulong sp, ulong r52); | |
54 | ||
867e359b CM |
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 | ||
0707ad30 CM |
71 | /* Helper method for assembly dump_stack(). */ |
72 | extern void _dump_stack(int dummy, ulong pc, ulong lr, ulong sp, ulong r52); | |
867e359b CM |
73 | |
74 | #endif /* _ASM_TILE_STACK_H */ |