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kdb: core for kgdb back end (1 of 2)
[linux.git] / kernel / debug / kdb / kdb_private.h
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JW		 1#ifndef _KDBPRIVATE_H
2#define _KDBPRIVATE_H
3
4/*
5 * Kernel Debugger Architecture Independent Private Headers
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
9 * for more details.
10 *
11 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
12 * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
13 */
14
15#include <linux/kgdb.h>
16#include "../debug_core.h"
17
18/* Kernel Debugger Error codes. Must not overlap with command codes. */
19#define KDB_NOTFOUND (-1)
20#define KDB_ARGCOUNT (-2)
21#define KDB_BADWIDTH (-3)
22#define KDB_BADRADIX (-4)
23#define KDB_NOTENV (-5)
24#define KDB_NOENVVALUE (-6)
25#define KDB_NOTIMP (-7)
26#define KDB_ENVFULL (-8)
27#define KDB_ENVBUFFULL (-9)
28#define KDB_TOOMANYBPT (-10)
29#define KDB_TOOMANYDBREGS (-11)
30#define KDB_DUPBPT (-12)
31#define KDB_BPTNOTFOUND (-13)
32#define KDB_BADMODE (-14)
33#define KDB_BADINT (-15)
34#define KDB_INVADDRFMT (-16)
35#define KDB_BADREG (-17)
36#define KDB_BADCPUNUM (-18)
37#define KDB_BADLENGTH (-19)
38#define KDB_NOBP (-20)
39#define KDB_BADADDR (-21)
40
41/* Kernel Debugger Command codes. Must not overlap with error codes. */
42#define KDB_CMD_GO (-1001)
43#define KDB_CMD_CPU (-1002)
44#define KDB_CMD_SS (-1003)
45#define KDB_CMD_SSB (-1004)
46#define KDB_CMD_KGDB (-1005)
47#define KDB_CMD_KGDB2 (-1006)
48
49/* Internal debug flags */
50#define KDB_DEBUG_FLAG_BP 0x0002 /* Breakpoint subsystem debug */
51#define KDB_DEBUG_FLAG_BB_SUMM 0x0004 /* Basic block analysis, summary only */
52#define KDB_DEBUG_FLAG_AR 0x0008 /* Activation record, generic */
53#define KDB_DEBUG_FLAG_ARA 0x0010 /* Activation record, arch specific */
54#define KDB_DEBUG_FLAG_BB 0x0020 /* All basic block analysis */
55#define KDB_DEBUG_FLAG_STATE 0x0040 /* State flags */
56#define KDB_DEBUG_FLAG_MASK 0xffff /* All debug flags */
57#define KDB_DEBUG_FLAG_SHIFT 16 /* Shift factor for dbflags */
58
59#define KDB_DEBUG(flag) (kdb_flags & \
60 (KDB_DEBUG_FLAG_##flag << KDB_DEBUG_FLAG_SHIFT))
61#define KDB_DEBUG_STATE(text, value) if (KDB_DEBUG(STATE)) \
62 kdb_print_state(text, value)
63
64#if BITS_PER_LONG == 32
65
66#define KDB_PLATFORM_ENV "BYTESPERWORD=4"
67
68#define kdb_machreg_fmt "0x%lx"
69#define kdb_machreg_fmt0 "0x%08lx"
70#define kdb_bfd_vma_fmt "0x%lx"
71#define kdb_bfd_vma_fmt0 "0x%08lx"
72#define kdb_elfw_addr_fmt "0x%x"
73#define kdb_elfw_addr_fmt0 "0x%08x"
74#define kdb_f_count_fmt "%d"
75
76#elif BITS_PER_LONG == 64
77
78#define KDB_PLATFORM_ENV "BYTESPERWORD=8"
79
80#define kdb_machreg_fmt "0x%lx"
81#define kdb_machreg_fmt0 "0x%016lx"
82#define kdb_bfd_vma_fmt "0x%lx"
83#define kdb_bfd_vma_fmt0 "0x%016lx"
84#define kdb_elfw_addr_fmt "0x%x"
85#define kdb_elfw_addr_fmt0 "0x%016x"
86#define kdb_f_count_fmt "%ld"
87
88#endif
89
90/*
91 * KDB_MAXBPT describes the total number of breakpoints
92 * supported by this architecure.
93 */
94#define KDB_MAXBPT 16
95
96/* Maximum number of arguments to a function */
97#define KDB_MAXARGS 16
98
99typedef enum {
100 KDB_REPEAT_NONE = 0, /* Do not repeat this command */
101 KDB_REPEAT_NO_ARGS, /* Repeat the command without arguments */
102 KDB_REPEAT_WITH_ARGS, /* Repeat the command including its arguments */
103} kdb_repeat_t;
104
105typedef int (*kdb_func_t)(int, const char **);
106
107/* Symbol table format returned by kallsyms. */
108typedef struct __ksymtab {
109 unsigned long value; /* Address of symbol */
110 const char *mod_name; /* Module containing symbol or
111 * "kernel" */
112 unsigned long mod_start;
113 unsigned long mod_end;
114 const char *sec_name; /* Section containing symbol */
115 unsigned long sec_start;
116 unsigned long sec_end;
117 const char *sym_name; /* Full symbol name, including
118 * any version */
119 unsigned long sym_start;
120 unsigned long sym_end;
121 } kdb_symtab_t;
122extern int kallsyms_symbol_next(char *prefix_name, int flag);
123extern int kallsyms_symbol_complete(char *prefix_name, int max_len);
124
125/* Exported Symbols for kernel loadable modules to use. */
126extern int kdb_register(char *, kdb_func_t, char *, char *, short);
127extern int kdb_register_repeat(char *, kdb_func_t, char *, char *,
128 short, kdb_repeat_t);
129extern int kdb_unregister(char *);
130
131extern int kdb_getarea_size(void *, unsigned long, size_t);
132extern int kdb_putarea_size(unsigned long, void *, size_t);
133
134/*
135 * Like get_user and put_user, kdb_getarea and kdb_putarea take variable
136 * names, not pointers. The underlying *_size functions take pointers.
137 */
138#define kdb_getarea(x, addr) kdb_getarea_size(&(x), addr, sizeof((x)))
139#define kdb_putarea(addr, x) kdb_putarea_size(addr, &(x), sizeof((x)))
140
141extern int kdb_getphysword(unsigned long *word,
142 unsigned long addr, size_t size);
143extern int kdb_getword(unsigned long *, unsigned long, size_t);
144extern int kdb_putword(unsigned long, unsigned long, size_t);
145
146extern int kdbgetularg(const char *, unsigned long *);
147extern int kdb_set(int, const char **);
148extern char *kdbgetenv(const char *);
149extern int kdbgetintenv(const char *, int *);
150extern int kdbgetaddrarg(int, const char **, int*, unsigned long *,
151 long *, char **);
152extern int kdbgetsymval(const char *, kdb_symtab_t *);
153extern int kdbnearsym(unsigned long, kdb_symtab_t *);
154extern void kdbnearsym_cleanup(void);
155extern char *kdb_strdup(const char *str, gfp_t type);
156extern void kdb_symbol_print(unsigned long, const kdb_symtab_t *, unsigned int);
157
158/* Routine for debugging the debugger state. */
159extern void kdb_print_state(const char *, int);
160
161extern int kdb_state;
162#define KDB_STATE_KDB 0x00000001 /* Cpu is inside kdb */
163#define KDB_STATE_LEAVING 0x00000002 /* Cpu is leaving kdb */
164#define KDB_STATE_CMD 0x00000004 /* Running a kdb command */
165#define KDB_STATE_KDB_CONTROL 0x00000008 /* This cpu is under
166 * kdb control */
167#define KDB_STATE_HOLD_CPU 0x00000010 /* Hold this cpu inside kdb */
168#define KDB_STATE_DOING_SS 0x00000020 /* Doing ss command */
169#define KDB_STATE_DOING_SSB 0x00000040 /* Doing ssb command,
170 * DOING_SS is also set */
171#define KDB_STATE_SSBPT 0x00000080 /* Install breakpoint
172 * after one ss, independent of
173 * DOING_SS */
174#define KDB_STATE_REENTRY 0x00000100 /* Valid re-entry into kdb */
175#define KDB_STATE_SUPPRESS 0x00000200 /* Suppress error messages */
176#define KDB_STATE_PAGER 0x00000400 /* pager is available */
177#define KDB_STATE_GO_SWITCH 0x00000800 /* go is switching
178 * back to initial cpu */
179#define KDB_STATE_PRINTF_LOCK 0x00001000 /* Holds kdb_printf lock */
180#define KDB_STATE_WAIT_IPI 0x00002000 /* Waiting for kdb_ipi() NMI */
181#define KDB_STATE_RECURSE 0x00004000 /* Recursive entry to kdb */
182#define KDB_STATE_IP_ADJUSTED 0x00008000 /* Restart IP has been
183 * adjusted */
184#define KDB_STATE_GO1 0x00010000 /* go only releases one cpu */
185#define KDB_STATE_KEYBOARD 0x00020000 /* kdb entered via
186 * keyboard on this cpu */
187#define KDB_STATE_KEXEC 0x00040000 /* kexec issued */
188#define KDB_STATE_DOING_KGDB 0x00080000 /* kgdb enter now issued */
189#define KDB_STATE_DOING_KGDB2 0x00100000 /* kgdb enter now issued */
190#define KDB_STATE_KGDB_TRANS 0x00200000 /* Transition to kgdb */
191#define KDB_STATE_ARCH 0xff000000 /* Reserved for arch
192 * specific use */
193
194#define KDB_STATE(flag) (kdb_state & KDB_STATE_##flag)
195#define KDB_STATE_SET(flag) ((void)(kdb_state |= KDB_STATE_##flag))
196#define KDB_STATE_CLEAR(flag) ((void)(kdb_state &= ~KDB_STATE_##flag))
197
198extern int kdb_nextline; /* Current number of lines displayed */
199
200typedef struct _kdb_bp {
201 unsigned long bp_addr; /* Address breakpoint is present at */
202 unsigned int bp_free:1; /* This entry is available */
203 unsigned int bp_enabled:1; /* Breakpoint is active in register */
204 unsigned int bp_type:4; /* Uses hardware register */
205 unsigned int bp_installed:1; /* Breakpoint is installed */
206 unsigned int bp_delay:1; /* Do delayed bp handling */
207 unsigned int bp_delayed:1; /* Delayed breakpoint */
208 unsigned int bph_length; /* HW break length */
209} kdb_bp_t;
210
211#ifdef CONFIG_KGDB_KDB
212extern kdb_bp_t kdb_breakpoints[/* KDB_MAXBPT */];
213
214/* The KDB shell command table */
215typedef struct _kdbtab {
216 char *cmd_name; /* Command name */
217 kdb_func_t cmd_func; /* Function to execute command */
218 char *cmd_usage; /* Usage String for this command */
219 char *cmd_help; /* Help message for this command */
220 short cmd_flags; /* Parsing flags */
221 short cmd_minlen; /* Minimum legal # command
222 * chars required */
223 kdb_repeat_t cmd_repeat; /* Does command auto repeat on enter? */
224} kdbtab_t;
225
226extern int kdb_bt(int, const char **); /* KDB display back trace */
227
228/* KDB breakpoint management functions */
229extern void kdb_initbptab(void);
230extern void kdb_bp_install(struct pt_regs *);
231extern void kdb_bp_remove(void);
232
233typedef enum {
234 KDB_DB_BPT, /* Breakpoint */
235 KDB_DB_SS, /* Single-step trap */
236 KDB_DB_SSB, /* Single step to branch */
237 KDB_DB_SSBPT, /* Single step over breakpoint */
238 KDB_DB_NOBPT /* Spurious breakpoint */
239} kdb_dbtrap_t;
240
241extern int kdb_main_loop(kdb_reason_t, kdb_reason_t,
242 int, kdb_dbtrap_t, struct pt_regs *);
243
244/* Miscellaneous functions and data areas */
245extern int kdb_grepping_flag;
246extern char kdb_grep_string[];
247extern int kdb_grep_leading;
248extern int kdb_grep_trailing;
249extern char *kdb_cmds[];
250extern void kdb_syslog_data(char *syslog_data[]);
251extern unsigned long kdb_task_state_string(const char *);
252extern char kdb_task_state_char (const struct task_struct *);
253extern unsigned long kdb_task_state(const struct task_struct *p,
254 unsigned long mask);
255extern void kdb_ps_suppressed(void);
256extern void kdb_ps1(const struct task_struct *p);
257extern int kdb_parse(const char *cmdstr);
258extern void kdb_print_nameval(const char *name, unsigned long val);
259extern void kdb_send_sig_info(struct task_struct *p, struct siginfo *info);
260extern void kdb_meminfo_proc_show(void);
261extern const char *kdb_walk_kallsyms(loff_t *pos);
262extern char *kdb_getstr(char *, size_t, char *);
263
264/* Defines for kdb_symbol_print */
265#define KDB_SP_SPACEB 0x0001 /* Space before string */
266#define KDB_SP_SPACEA 0x0002 /* Space after string */
267#define KDB_SP_PAREN 0x0004 /* Parenthesis around string */
268#define KDB_SP_VALUE 0x0008 /* Print the value of the address */
269#define KDB_SP_SYMSIZE 0x0010 /* Print the size of the symbol */
270#define KDB_SP_NEWLINE 0x0020 /* Newline after string */
271#define KDB_SP_DEFAULT (KDB_SP_VALUE|KDB_SP_PAREN)
272
273#define KDB_TSK(cpu) kgdb_info[cpu].task
274#define KDB_TSKREGS(cpu) kgdb_info[cpu].debuggerinfo
275
276extern struct task_struct *kdb_curr_task(int);
277
278#define kdb_task_has_cpu(p) (task_curr(p))
279
280/* Simplify coexistence with NPTL */
281#define kdb_do_each_thread(g, p) do_each_thread(g, p)
282#define kdb_while_each_thread(g, p) while_each_thread(g, p)
283
284#define GFP_KDB (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
285
286extern void *debug_kmalloc(size_t size, gfp_t flags);
287extern void debug_kfree(void *);
288extern void debug_kusage(void);
289
290extern void kdb_set_current_task(struct task_struct *);
291extern struct task_struct *kdb_current_task;
292#ifdef CONFIG_MODULES
293extern struct list_head *kdb_modules;
294#endif /* CONFIG_MODULES */
295
296extern char kdb_prompt_str[];
297
298#define KDB_WORD_SIZE ((int)sizeof(unsigned long))
299
300#endif /* CONFIG_KGDB_KDB */
301#endif /* !_KDBPRIVATE_H */
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