Linux Kernel  3.7.1
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debug_core.h
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1 /*
2  * Created by: Jason Wessel <[email protected]>
3  *
4  * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
5  *
6  * This file is licensed under the terms of the GNU General Public
7  * License version 2. This program is licensed "as is" without any
8  * warranty of any kind, whether express or implied.
9  */
10 
11 #ifndef _DEBUG_CORE_H_
12 #define _DEBUG_CORE_H_
13 /*
14  * These are the private implementation headers between the kernel
15  * debugger core and the debugger front end code.
16  */
17 
18 /* kernel debug core data structures */
19 struct kgdb_state {
20  int ex_vector;
21  int signo;
22  int err_code;
23  int cpu;
24  int pass_exception;
25  unsigned long thr_query;
26  unsigned long threadid;
27  long kgdb_usethreadid;
28  struct pt_regs *linux_regs;
29 };
30 
31 /* Exception state values */
32 #define DCPU_WANT_MASTER 0x1 /* Waiting to become a master kgdb cpu */
33 #define DCPU_NEXT_MASTER 0x2 /* Transition from one master cpu to another */
34 #define DCPU_IS_SLAVE 0x4 /* Slave cpu enter exception */
35 #define DCPU_SSTEP 0x8 /* CPU is single stepping */
36 
37 struct debuggerinfo_struct {
38  void *debuggerinfo;
39  struct task_struct *task;
40  int exception_state;
41  int ret_state;
42  int irq_depth;
43  int enter_kgdb;
44 };
45 
46 extern struct debuggerinfo_struct kgdb_info[];
47 
48 /* kernel debug core break point routines */
49 extern int dbg_remove_all_break(void);
50 extern int dbg_set_sw_break(unsigned long addr);
51 extern int dbg_remove_sw_break(unsigned long addr);
52 extern int dbg_activate_sw_breakpoints(void);
53 extern int dbg_deactivate_sw_breakpoints(void);
54 
55 /* polled character access to i/o module */
56 extern int dbg_io_get_char(void);
57 
58 /* stub return value for switching between the gdbstub and kdb */
59 #define DBG_PASS_EVENT -12345
60 /* Switch from one cpu to another */
61 #define DBG_SWITCH_CPU_EVENT -123456
62 extern int dbg_switch_cpu;
63 
64 /* gdbstub interface functions */
65 extern int gdb_serial_stub(struct kgdb_state *ks);
66 extern void gdbstub_msg_write(const char *s, int len);
67 
68 /* gdbstub functions used for kdb <-> gdbstub transition */
69 extern int gdbstub_state(struct kgdb_state *ks, char *cmd);
70 extern int dbg_kdb_mode;
71 
72 #ifdef CONFIG_KGDB_KDB
73 extern int kdb_stub(struct kgdb_state *ks);
74 extern int kdb_parse(const char *cmdstr);
75 #else /* ! CONFIG_KGDB_KDB */
76 static inline int kdb_stub(struct kgdb_state *ks)
77 {
78  return DBG_PASS_EVENT;
79 }
80 #endif /* CONFIG_KGDB_KDB */
81 
82 #endif /* _DEBUG_CORE_H_ */
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