1 | /* |
2 | * Created by: Jason Wessel <jason.wessel@windriver.com> |
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 | atomic_t *send_ready; |
30 | }; |
31 | |
32 | /* Exception state values */ |
33 | #define DCPU_WANT_MASTER 0x1 /* Waiting to become a master kgdb cpu */ |
34 | #define DCPU_NEXT_MASTER 0x2 /* Transition from one master cpu to another */ |
35 | #define DCPU_IS_SLAVE 0x4 /* Slave cpu enter exception */ |
36 | #define DCPU_WANT_BT 0x8 /* Slave cpu should backtrace then clear flag */ |
37 | |
38 | struct debuggerinfo_struct { |
39 | void *debuggerinfo; |
40 | struct task_struct *task; |
41 | int exception_state; |
42 | int ret_state; |
43 | int irq_depth; |
44 | int enter_kgdb; |
45 | bool rounding_up; |
46 | }; |
47 | |
48 | extern struct debuggerinfo_struct kgdb_info[]; |
49 | |
50 | /* kernel debug core break point routines */ |
51 | extern int dbg_remove_all_break(void); |
52 | extern int dbg_set_sw_break(unsigned long addr); |
53 | extern int dbg_remove_sw_break(unsigned long addr); |
54 | extern int dbg_activate_sw_breakpoints(void); |
55 | extern int dbg_deactivate_sw_breakpoints(void); |
56 | |
57 | /* polled character access to i/o module */ |
58 | extern int dbg_io_get_char(void); |
59 | |
60 | /* stub return value for switching between the gdbstub and kdb */ |
61 | #define DBG_PASS_EVENT -12345 |
62 | /* Switch from one cpu to another */ |
63 | #define DBG_SWITCH_CPU_EVENT -123456 |
64 | extern int dbg_switch_cpu; |
65 | |
66 | /* gdbstub interface functions */ |
67 | extern int gdb_serial_stub(struct kgdb_state *ks); |
68 | extern void gdbstub_msg_write(const char *s, int len); |
69 | |
70 | /* gdbstub functions used for kdb <-> gdbstub transition */ |
71 | extern int gdbstub_state(struct kgdb_state *ks, char *cmd); |
72 | extern int dbg_kdb_mode; |
73 | |
74 | #ifdef CONFIG_KGDB_KDB |
75 | extern int kdb_stub(struct kgdb_state *ks); |
76 | extern int kdb_parse(const char *cmdstr); |
77 | extern int kdb_common_init_state(struct kgdb_state *ks); |
78 | extern int kdb_common_deinit_state(void); |
79 | extern void kdb_dump_stack_on_cpu(int cpu); |
80 | #else /* ! CONFIG_KGDB_KDB */ |
81 | static inline int kdb_stub(struct kgdb_state *ks) |
82 | { |
83 | return DBG_PASS_EVENT; |
84 | } |
85 | #endif /* CONFIG_KGDB_KDB */ |
86 | |
87 | #endif /* _DEBUG_CORE_H_ */ |
88 | |