1 /* 1 /*
2 * This provides the callbacks and functions t 2 * This provides the callbacks and functions that KGDB needs to share between
3 * the core, I/O and arch-specific portions. 3 * the core, I/O and arch-specific portions.
4 * 4 *
5 * Author: Amit Kale <amitkale@linsyssoft.com> 5 * Author: Amit Kale <amitkale@linsyssoft.com> and
6 * Tom Rini <trini@kernel.crashing.org 6 * Tom Rini <trini@kernel.crashing.org>
7 * 7 *
8 * 2001-2004 (c) Amit S. Kale and 2003-2005 (c 8 * 2001-2004 (c) Amit S. Kale and 2003-2005 (c) MontaVista Software, Inc.
9 * This file is licensed under the terms of th 9 * This file is licensed under the terms of the GNU General Public License
10 * version 2. This program is licensed "as is" 10 * version 2. This program is licensed "as is" without any warranty of any
11 * kind, whether express or implied. 11 * kind, whether express or implied.
12 */ 12 */
13 #ifndef _KGDB_H_ 13 #ifndef _KGDB_H_
14 #define _KGDB_H_ 14 #define _KGDB_H_
15 15
16 #include <linux/linkage.h> 16 #include <linux/linkage.h>
17 #include <linux/init.h> 17 #include <linux/init.h>
18 #include <linux/atomic.h> 18 #include <linux/atomic.h>
19 #include <linux/kprobes.h> 19 #include <linux/kprobes.h>
20 #ifdef CONFIG_HAVE_ARCH_KGDB 20 #ifdef CONFIG_HAVE_ARCH_KGDB
21 #include <asm/kgdb.h> 21 #include <asm/kgdb.h>
22 #endif 22 #endif
23 23
24 #ifdef CONFIG_KGDB 24 #ifdef CONFIG_KGDB
25 struct pt_regs; 25 struct pt_regs;
26 26
27 /** 27 /**
28 * kgdb_skipexception - (optional) exit k 28 * kgdb_skipexception - (optional) exit kgdb_handle_exception early
29 * @exception: Exception vector number 29 * @exception: Exception vector number
30 * @regs: Current &struct pt_regs. 30 * @regs: Current &struct pt_regs.
31 * 31 *
32 * On some architectures it is required t 32 * On some architectures it is required to skip a breakpoint
33 * exception when it occurs after a break 33 * exception when it occurs after a breakpoint has been removed.
34 * This can be implemented in the archite 34 * This can be implemented in the architecture specific portion of kgdb.
35 */ 35 */
36 extern int kgdb_skipexception(int exception, s 36 extern int kgdb_skipexception(int exception, struct pt_regs *regs);
37 37
38 struct tasklet_struct; 38 struct tasklet_struct;
39 struct task_struct; 39 struct task_struct;
40 struct uart_port; 40 struct uart_port;
41 41
42 /** 42 /**
43 * kgdb_breakpoint - compiled in breakpoi 43 * kgdb_breakpoint - compiled in breakpoint
44 * 44 *
45 * This will be implemented as a static i 45 * This will be implemented as a static inline per architecture. This
46 * function is called by the kgdb core to 46 * function is called by the kgdb core to execute an architecture
47 * specific trap to cause kgdb to enter t 47 * specific trap to cause kgdb to enter the exception processing.
48 * 48 *
49 */ 49 */
50 void kgdb_breakpoint(void); 50 void kgdb_breakpoint(void);
51 51
52 extern int kgdb_connected; 52 extern int kgdb_connected;
53 extern int kgdb_io_module_registered; 53 extern int kgdb_io_module_registered;
54 54
55 extern atomic_t kgdb_setting_b 55 extern atomic_t kgdb_setting_breakpoint;
56 extern atomic_t kgdb_cpu_doing 56 extern atomic_t kgdb_cpu_doing_single_step;
57 57
58 extern struct task_struct *kgdb_usethrea 58 extern struct task_struct *kgdb_usethread;
59 extern struct task_struct *kgdb_contthre 59 extern struct task_struct *kgdb_contthread;
60 60
61 enum kgdb_bptype { 61 enum kgdb_bptype {
62 BP_BREAKPOINT = 0, 62 BP_BREAKPOINT = 0,
63 BP_HARDWARE_BREAKPOINT, 63 BP_HARDWARE_BREAKPOINT,
64 BP_WRITE_WATCHPOINT, 64 BP_WRITE_WATCHPOINT,
65 BP_READ_WATCHPOINT, 65 BP_READ_WATCHPOINT,
66 BP_ACCESS_WATCHPOINT, 66 BP_ACCESS_WATCHPOINT,
67 BP_POKE_BREAKPOINT, 67 BP_POKE_BREAKPOINT,
68 }; 68 };
69 69
70 enum kgdb_bpstate { 70 enum kgdb_bpstate {
71 BP_UNDEFINED = 0, 71 BP_UNDEFINED = 0,
72 BP_REMOVED, 72 BP_REMOVED,
73 BP_SET, 73 BP_SET,
74 BP_ACTIVE 74 BP_ACTIVE
75 }; 75 };
76 76
77 struct kgdb_bkpt { 77 struct kgdb_bkpt {
78 unsigned long bpt_addr; 78 unsigned long bpt_addr;
79 unsigned char saved_instr[BR 79 unsigned char saved_instr[BREAK_INSTR_SIZE];
80 enum kgdb_bptype type; 80 enum kgdb_bptype type;
81 enum kgdb_bpstate state; 81 enum kgdb_bpstate state;
82 }; 82 };
83 83
84 struct dbg_reg_def_t { 84 struct dbg_reg_def_t {
85 char *name; 85 char *name;
86 int size; 86 int size;
87 int offset; 87 int offset;
88 }; 88 };
89 89
90 #ifndef DBG_MAX_REG_NUM 90 #ifndef DBG_MAX_REG_NUM
91 #define DBG_MAX_REG_NUM 0 91 #define DBG_MAX_REG_NUM 0
92 #else 92 #else
93 extern struct dbg_reg_def_t dbg_reg_def[]; 93 extern struct dbg_reg_def_t dbg_reg_def[];
94 extern char *dbg_get_reg(int regno, void *mem, 94 extern char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs);
95 extern int dbg_set_reg(int regno, void *mem, s 95 extern int dbg_set_reg(int regno, void *mem, struct pt_regs *regs);
96 #endif 96 #endif
97 #ifndef KGDB_MAX_BREAKPOINTS 97 #ifndef KGDB_MAX_BREAKPOINTS
98 # define KGDB_MAX_BREAKPOINTS 1000 98 # define KGDB_MAX_BREAKPOINTS 1000
99 #endif 99 #endif
100 100
101 #define KGDB_HW_BREAKPOINT 1 101 #define KGDB_HW_BREAKPOINT 1
102 102
103 /* 103 /*
104 * Functions each KGDB-supporting architecture 104 * Functions each KGDB-supporting architecture must provide:
105 */ 105 */
106 106
107 /** 107 /**
108 * kgdb_arch_init - Perform any architect !! 108 * kgdb_arch_init - Perform any architecture specific initalization.
109 * 109 *
110 * This function will handle the initiali !! 110 * This function will handle the initalization of any architecture
111 * specific callbacks. 111 * specific callbacks.
112 */ 112 */
113 extern int kgdb_arch_init(void); 113 extern int kgdb_arch_init(void);
114 114
115 /** 115 /**
116 * kgdb_arch_exit - Perform any architect 116 * kgdb_arch_exit - Perform any architecture specific uninitalization.
117 * 117 *
118 * This function will handle the uninital 118 * This function will handle the uninitalization of any architecture
119 * specific callbacks, for dynamic regist 119 * specific callbacks, for dynamic registration and unregistration.
120 */ 120 */
121 extern void kgdb_arch_exit(void); 121 extern void kgdb_arch_exit(void);
122 122
123 /** 123 /**
124 * pt_regs_to_gdb_regs - Convert ptrace r 124 * pt_regs_to_gdb_regs - Convert ptrace regs to GDB regs
125 * @gdb_regs: A pointer to hold the regis 125 * @gdb_regs: A pointer to hold the registers in the order GDB wants.
126 * @regs: The &struct pt_regs of the curr 126 * @regs: The &struct pt_regs of the current process.
127 * 127 *
128 * Convert the pt_regs in @regs into the 128 * Convert the pt_regs in @regs into the format for registers that
129 * GDB expects, stored in @gdb_regs. 129 * GDB expects, stored in @gdb_regs.
130 */ 130 */
131 extern void pt_regs_to_gdb_regs(unsigned long 131 extern void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs);
132 132
133 /** 133 /**
134 * sleeping_thread_to_gdb_regs - Convert 134 * sleeping_thread_to_gdb_regs - Convert ptrace regs to GDB regs
135 * @gdb_regs: A pointer to hold the regis 135 * @gdb_regs: A pointer to hold the registers in the order GDB wants.
136 * @p: The &struct task_struct of the des 136 * @p: The &struct task_struct of the desired process.
137 * 137 *
138 * Convert the register values of the sle 138 * Convert the register values of the sleeping process in @p to
139 * the format that GDB expects. 139 * the format that GDB expects.
140 * This function is called when kgdb does 140 * This function is called when kgdb does not have access to the
141 * &struct pt_regs and therefore it shoul 141 * &struct pt_regs and therefore it should fill the gdb registers
142 * @gdb_regs with what has been saved in 142 * @gdb_regs with what has been saved in &struct thread_struct
143 * thread field during switch_to. 143 * thread field during switch_to.
144 */ 144 */
145 extern void 145 extern void
146 sleeping_thread_to_gdb_regs(unsigned long *gdb 146 sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p);
147 147
148 /** 148 /**
149 * gdb_regs_to_pt_regs - Convert GDB regs 149 * gdb_regs_to_pt_regs - Convert GDB regs to ptrace regs.
150 * @gdb_regs: A pointer to hold the regis 150 * @gdb_regs: A pointer to hold the registers we've received from GDB.
151 * @regs: A pointer to a &struct pt_regs 151 * @regs: A pointer to a &struct pt_regs to hold these values in.
152 * 152 *
153 * Convert the GDB regs in @gdb_regs into 153 * Convert the GDB regs in @gdb_regs into the pt_regs, and store them
154 * in @regs. 154 * in @regs.
155 */ 155 */
156 extern void gdb_regs_to_pt_regs(unsigned long 156 extern void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs);
157 157
158 /** 158 /**
159 * kgdb_arch_handle_exception - Handle ar 159 * kgdb_arch_handle_exception - Handle architecture specific GDB packets.
160 * @vector: The error vector of the excep 160 * @vector: The error vector of the exception that happened.
161 * @signo: The signal number of the excep 161 * @signo: The signal number of the exception that happened.
162 * @err_code: The error code of the excep 162 * @err_code: The error code of the exception that happened.
163 * @remcom_in_buffer: The buffer of the p 163 * @remcom_in_buffer: The buffer of the packet we have read.
164 * @remcom_out_buffer: The buffer of %BUF 164 * @remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
165 * @regs: The &struct pt_regs of the curr 165 * @regs: The &struct pt_regs of the current process.
166 * 166 *
167 * This function MUST handle the 'c' and 167 * This function MUST handle the 'c' and 's' command packets,
168 * as well packets to set / remove a hard 168 * as well packets to set / remove a hardware breakpoint, if used.
169 * If there are additional packets which 169 * If there are additional packets which the hardware needs to handle,
170 * they are handled here. The code shoul 170 * they are handled here. The code should return -1 if it wants to
171 * process more packets, and a %0 or %1 i 171 * process more packets, and a %0 or %1 if it wants to exit from the
172 * kgdb callback. 172 * kgdb callback.
173 */ 173 */
174 extern int 174 extern int
175 kgdb_arch_handle_exception(int vector, int sig 175 kgdb_arch_handle_exception(int vector, int signo, int err_code,
176 char *remcom_in_buf 176 char *remcom_in_buffer,
177 char *remcom_out_bu 177 char *remcom_out_buffer,
178 struct pt_regs *reg 178 struct pt_regs *regs);
179 179
180 /** 180 /**
181 * kgdb_arch_handle_qxfer_pkt - Handle ar 181 * kgdb_arch_handle_qxfer_pkt - Handle architecture specific GDB XML
182 * packets. 182 * packets.
183 * @remcom_in_buffer: The buffer of the p 183 * @remcom_in_buffer: The buffer of the packet we have read.
184 * @remcom_out_buffer: The buffer of %BUF 184 * @remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
185 */ 185 */
186 186
187 extern void 187 extern void
188 kgdb_arch_handle_qxfer_pkt(char *remcom_in_buf 188 kgdb_arch_handle_qxfer_pkt(char *remcom_in_buffer,
189 char *remcom_out_bu 189 char *remcom_out_buffer);
190 190
191 /** 191 /**
192 * kgdb_call_nmi_hook - Call kgdb_nmicall 192 * kgdb_call_nmi_hook - Call kgdb_nmicallback() on the current CPU
193 * @ignored: This parameter is only here 193 * @ignored: This parameter is only here to match the prototype.
194 * 194 *
195 * If you're using the default implementa 195 * If you're using the default implementation of kgdb_roundup_cpus()
196 * this function will be called per CPU. 196 * this function will be called per CPU. If you don't implement
197 * kgdb_call_nmi_hook() a default will be 197 * kgdb_call_nmi_hook() a default will be used.
198 */ 198 */
199 199
200 extern void kgdb_call_nmi_hook(void *ignored); 200 extern void kgdb_call_nmi_hook(void *ignored);
201 201
202 /** 202 /**
203 * kgdb_roundup_cpus - Get other CPUs int 203 * kgdb_roundup_cpus - Get other CPUs into a holding pattern
204 * 204 *
205 * On SMP systems, we need to get the att 205 * On SMP systems, we need to get the attention of the other CPUs
206 * and get them into a known state. This 206 * and get them into a known state. This should do what is needed
207 * to get the other CPUs to call kgdb_wai 207 * to get the other CPUs to call kgdb_wait(). Note that on some arches,
208 * the NMI approach is not used for round 208 * the NMI approach is not used for rounding up all the CPUs. Normally
209 * those architectures can just not imple 209 * those architectures can just not implement this and get the default.
210 * 210 *
211 * On non-SMP systems, this is not called 211 * On non-SMP systems, this is not called.
212 */ 212 */
213 extern void kgdb_roundup_cpus(void); 213 extern void kgdb_roundup_cpus(void);
214 214
215 /** 215 /**
216 * kgdb_arch_set_pc - Generic call back t 216 * kgdb_arch_set_pc - Generic call back to the program counter
217 * @regs: Current &struct pt_regs. 217 * @regs: Current &struct pt_regs.
218 * @pc: The new value for the program counter 218 * @pc: The new value for the program counter
219 * 219 *
220 * This function handles updating the pro 220 * This function handles updating the program counter and requires an
221 * architecture specific implementation. 221 * architecture specific implementation.
222 */ 222 */
223 extern void kgdb_arch_set_pc(struct pt_regs *r 223 extern void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc);
224 224
225 225
226 /* Optional functions. */ 226 /* Optional functions. */
227 extern int kgdb_validate_break_address(unsigne 227 extern int kgdb_validate_break_address(unsigned long addr);
228 extern int kgdb_arch_set_breakpoint(struct kgd 228 extern int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt);
229 extern int kgdb_arch_remove_breakpoint(struct 229 extern int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt);
230 230
231 /** 231 /**
232 * kgdb_arch_late - Perform any architect !! 232 * kgdb_arch_late - Perform any architecture specific initalization.
233 * 233 *
234 * This function will handle the late ini !! 234 * This function will handle the late initalization of any
235 * architecture specific callbacks. This 235 * architecture specific callbacks. This is an optional function for
236 * handling things like late initializati 236 * handling things like late initialization of hw breakpoints. The
237 * default implementation does nothing. 237 * default implementation does nothing.
238 */ 238 */
239 extern void kgdb_arch_late(void); 239 extern void kgdb_arch_late(void);
240 240
241 241
242 /** 242 /**
243 * struct kgdb_arch - Describe architecture sp 243 * struct kgdb_arch - Describe architecture specific values.
244 * @gdb_bpt_instr: The instruction to trigger 244 * @gdb_bpt_instr: The instruction to trigger a breakpoint.
245 * @flags: Flags for the breakpoint, currently 245 * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
246 * @set_breakpoint: Allow an architecture to s 246 * @set_breakpoint: Allow an architecture to specify how to set a software
247 * breakpoint. 247 * breakpoint.
248 * @remove_breakpoint: Allow an architecture t 248 * @remove_breakpoint: Allow an architecture to specify how to remove a
249 * software breakpoint. 249 * software breakpoint.
250 * @set_hw_breakpoint: Allow an architecture t 250 * @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
251 * breakpoint. 251 * breakpoint.
252 * @remove_hw_breakpoint: Allow an architectur 252 * @remove_hw_breakpoint: Allow an architecture to specify how to remove a
253 * hardware breakpoint. 253 * hardware breakpoint.
254 * @disable_hw_break: Allow an architecture to 254 * @disable_hw_break: Allow an architecture to specify how to disable
255 * hardware breakpoints for a single cpu. 255 * hardware breakpoints for a single cpu.
256 * @remove_all_hw_break: Allow an architecture 256 * @remove_all_hw_break: Allow an architecture to specify how to remove all
257 * hardware breakpoints. 257 * hardware breakpoints.
258 * @correct_hw_break: Allow an architecture to 258 * @correct_hw_break: Allow an architecture to specify how to correct the
259 * hardware debug registers. 259 * hardware debug registers.
260 * @enable_nmi: Manage NMI-triggered entry to 260 * @enable_nmi: Manage NMI-triggered entry to KGDB
261 */ 261 */
262 struct kgdb_arch { 262 struct kgdb_arch {
263 unsigned char gdb_bpt_instr[ 263 unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE];
264 unsigned long flags; 264 unsigned long flags;
265 265
266 int (*set_breakpoint)(unsigned lon 266 int (*set_breakpoint)(unsigned long, char *);
267 int (*remove_breakpoint)(unsigned 267 int (*remove_breakpoint)(unsigned long, char *);
268 int (*set_hw_breakpoint)(unsigned 268 int (*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
269 int (*remove_hw_breakpoint)(unsign 269 int (*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
270 void (*disable_hw_break)(struct pt_ 270 void (*disable_hw_break)(struct pt_regs *regs);
271 void (*remove_all_hw_break)(void); 271 void (*remove_all_hw_break)(void);
272 void (*correct_hw_break)(void); 272 void (*correct_hw_break)(void);
273 273
274 void (*enable_nmi)(bool on); 274 void (*enable_nmi)(bool on);
275 }; 275 };
276 276
277 /** 277 /**
278 * struct kgdb_io - Describe the interface for 278 * struct kgdb_io - Describe the interface for an I/O driver to talk with KGDB.
279 * @name: Name of the I/O driver. 279 * @name: Name of the I/O driver.
280 * @read_char: Pointer to a function that will 280 * @read_char: Pointer to a function that will return one char.
281 * @write_char: Pointer to a function that wil 281 * @write_char: Pointer to a function that will write one char.
282 * @flush: Pointer to a function that will flu 282 * @flush: Pointer to a function that will flush any pending writes.
283 * @init: Pointer to a function that will init 283 * @init: Pointer to a function that will initialize the device.
284 * @deinit: Pointer to a function that will de 284 * @deinit: Pointer to a function that will deinit the device. Implies that
285 * this I/O driver is temporary and expects to 285 * this I/O driver is temporary and expects to be replaced. Called when
286 * an I/O driver is replaced or explicitly unr 286 * an I/O driver is replaced or explicitly unregistered.
287 * @pre_exception: Pointer to a function that 287 * @pre_exception: Pointer to a function that will do any prep work for
288 * the I/O driver. 288 * the I/O driver.
289 * @post_exception: Pointer to a function that 289 * @post_exception: Pointer to a function that will do any cleanup work
290 * for the I/O driver. 290 * for the I/O driver.
291 * @cons: valid if the I/O device is a console 291 * @cons: valid if the I/O device is a console; else NULL.
292 */ 292 */
293 struct kgdb_io { 293 struct kgdb_io {
294 const char *name; 294 const char *name;
295 int (*read_char) ( 295 int (*read_char) (void);
296 void (*write_char) 296 void (*write_char) (u8);
297 void (*flush) (void 297 void (*flush) (void);
298 int (*init) (void) 298 int (*init) (void);
299 void (*deinit) (voi 299 void (*deinit) (void);
300 void (*pre_exceptio 300 void (*pre_exception) (void);
301 void (*post_excepti 301 void (*post_exception) (void);
302 struct console *cons; 302 struct console *cons;
303 }; 303 };
304 304
305 extern const struct kgdb_arch arch_k 305 extern const struct kgdb_arch arch_kgdb_ops;
306 306
307 extern unsigned long kgdb_arch_pc(int exceptio 307 extern unsigned long kgdb_arch_pc(int exception, struct pt_regs *regs);
308 308
309 #ifdef CONFIG_SERIAL_KGDB_NMI 309 #ifdef CONFIG_SERIAL_KGDB_NMI
310 extern int kgdb_register_nmi_console(void); 310 extern int kgdb_register_nmi_console(void);
311 extern int kgdb_unregister_nmi_console(void); 311 extern int kgdb_unregister_nmi_console(void);
312 extern bool kgdb_nmi_poll_knock(void); 312 extern bool kgdb_nmi_poll_knock(void);
313 #else 313 #else
314 static inline int kgdb_register_nmi_console(vo 314 static inline int kgdb_register_nmi_console(void) { return 0; }
315 static inline int kgdb_unregister_nmi_console( 315 static inline int kgdb_unregister_nmi_console(void) { return 0; }
316 static inline bool kgdb_nmi_poll_knock(void) { 316 static inline bool kgdb_nmi_poll_knock(void) { return true; }
317 #endif 317 #endif
318 318
319 extern int kgdb_register_io_module(struct kgdb 319 extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
320 extern void kgdb_unregister_io_module(struct k 320 extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
321 extern struct kgdb_io *dbg_io_ops; 321 extern struct kgdb_io *dbg_io_ops;
322 322
323 extern int kgdb_hex2long(char **ptr, unsigned 323 extern int kgdb_hex2long(char **ptr, unsigned long *long_val);
324 extern char *kgdb_mem2hex(char *mem, char *buf 324 extern char *kgdb_mem2hex(char *mem, char *buf, int count);
325 extern int kgdb_hex2mem(char *buf, char *mem, 325 extern int kgdb_hex2mem(char *buf, char *mem, int count);
326 326
327 extern int kgdb_isremovedbreak(unsigned long a 327 extern int kgdb_isremovedbreak(unsigned long addr);
>> 328 extern void kgdb_schedule_breakpoint(void);
328 extern int kgdb_has_hit_break(unsigned long ad 329 extern int kgdb_has_hit_break(unsigned long addr);
329 330
330 extern int 331 extern int
331 kgdb_handle_exception(int ex_vector, int signo 332 kgdb_handle_exception(int ex_vector, int signo, int err_code,
332 struct pt_regs *regs); 333 struct pt_regs *regs);
333 extern int kgdb_nmicallback(int cpu, void *reg 334 extern int kgdb_nmicallback(int cpu, void *regs);
334 extern int kgdb_nmicallin(int cpu, int trapnr, 335 extern int kgdb_nmicallin(int cpu, int trapnr, void *regs, int err_code,
335 atomic_t *snd_rdy); 336 atomic_t *snd_rdy);
336 extern void gdbstub_exit(int status); 337 extern void gdbstub_exit(int status);
337 338
338 /* 339 /*
339 * kgdb and kprobes both use the same (kprobe) 340 * kgdb and kprobes both use the same (kprobe) blocklist (which makes sense
340 * given they are both typically hooked up to 341 * given they are both typically hooked up to the same trap meaning on most
341 * architectures one cannot be used to debug t 342 * architectures one cannot be used to debug the other)
342 * 343 *
343 * However on architectures where kprobes is n 344 * However on architectures where kprobes is not (yet) implemented we permit
344 * breakpoints everywhere rather than blocking 345 * breakpoints everywhere rather than blocking everything by default.
345 */ 346 */
346 static inline bool kgdb_within_blocklist(unsig 347 static inline bool kgdb_within_blocklist(unsigned long addr)
347 { 348 {
348 #ifdef CONFIG_KGDB_HONOUR_BLOCKLIST 349 #ifdef CONFIG_KGDB_HONOUR_BLOCKLIST
349 return within_kprobe_blacklist(addr); 350 return within_kprobe_blacklist(addr);
350 #else 351 #else
351 return false; 352 return false;
352 #endif 353 #endif
353 } 354 }
354 355
355 extern int kgdb_single_st 356 extern int kgdb_single_step;
356 extern atomic_t kgdb_active; 357 extern atomic_t kgdb_active;
357 #define in_dbg_master() \ 358 #define in_dbg_master() \
358 (irqs_disabled() && (smp_processor_id( 359 (irqs_disabled() && (smp_processor_id() == atomic_read(&kgdb_active)))
359 extern bool dbg_is_early; 360 extern bool dbg_is_early;
360 extern void __init dbg_late_init(void); 361 extern void __init dbg_late_init(void);
361 extern void kgdb_panic(const char *msg); 362 extern void kgdb_panic(const char *msg);
362 extern void kgdb_free_init_mem(void); 363 extern void kgdb_free_init_mem(void);
363 #else /* ! CONFIG_KGDB */ 364 #else /* ! CONFIG_KGDB */
364 #define in_dbg_master() (0) 365 #define in_dbg_master() (0)
365 #define dbg_late_init() 366 #define dbg_late_init()
366 static inline void kgdb_panic(const char *msg) 367 static inline void kgdb_panic(const char *msg) {}
367 static inline void kgdb_free_init_mem(void) { 368 static inline void kgdb_free_init_mem(void) { }
368 static inline int kgdb_nmicallback(int cpu, vo <<
369 #endif /* ! CONFIG_KGDB */ 369 #endif /* ! CONFIG_KGDB */
370 #endif /* _KGDB_H_ */ 370 #endif /* _KGDB_H_ */
371 371
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