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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <arch/debugger.h> |
29 | #include <arch/debugger.h> |
30 | #include <console/kconsole.h> |
30 | #include <console/kconsole.h> |
31 | #include <console/cmd.h> |
31 | #include <console/cmd.h> |
32 | #include <symtab.h> |
32 | #include <symtab.h> |
33 | #include <print.h> |
33 | #include <print.h> |
34 | #include <panic.h> |
34 | #include <panic.h> |
35 | #include <interrupt.h> |
35 | #include <interrupt.h> |
36 | #include <arch/asm.h> |
36 | #include <arch/asm.h> |
37 | #include <arch/cpu.h> |
37 | #include <arch/cpu.h> |
38 | #include <debug.h> |
38 | #include <debug.h> |
39 | #include <func.h> |
39 | #include <func.h> |
- | 40 | #include <smp/ipi.h> |
|
40 | 41 | ||
41 | typedef struct { |
42 | typedef struct { |
42 | __address address; /**< Breakpoint address */ |
43 | __address address; /**< Breakpoint address */ |
43 | int flags; /**< Flags regarding breakpoint */ |
44 | int flags; /**< Flags regarding breakpoint */ |
44 | int counter; /**< How many times the exception occured */ |
45 | int counter; /**< How many times the exception occured */ |
45 | } bpinfo_t; |
46 | } bpinfo_t; |
46 | 47 | ||
47 | static bpinfo_t breakpoints[BKPOINTS_MAX]; |
48 | static bpinfo_t breakpoints[BKPOINTS_MAX]; |
48 | SPINLOCK_INITIALIZE(bkpoint_lock); |
49 | SPINLOCK_INITIALIZE(bkpoint_lock); |
49 | 50 | ||
50 | static int cmd_print_breakpoints(cmd_arg_t *argv); |
51 | static int cmd_print_breakpoints(cmd_arg_t *argv); |
51 | static cmd_info_t bkpts_info = { |
52 | static cmd_info_t bkpts_info = { |
52 | .name = "bkpts", |
53 | .name = "bkpts", |
53 | .description = "Print breakpoint table.", |
54 | .description = "Print breakpoint table.", |
54 | .func = cmd_print_breakpoints, |
55 | .func = cmd_print_breakpoints, |
55 | .argc = 0, |
56 | .argc = 0, |
56 | }; |
57 | }; |
57 | 58 | ||
- | 59 | #ifndef CONFIG_DEBUG_AS_WATCHPOINT |
|
- | 60 | ||
58 | static int cmd_del_breakpoint(cmd_arg_t *argv); |
61 | static int cmd_del_breakpoint(cmd_arg_t *argv); |
59 | static cmd_arg_t del_argv = { |
62 | static cmd_arg_t del_argv = { |
60 | .type = ARG_TYPE_INT |
63 | .type = ARG_TYPE_INT |
61 | }; |
64 | }; |
62 | static cmd_info_t delbkpt_info = { |
65 | static cmd_info_t delbkpt_info = { |
63 | .name = "delbkpt", |
66 | .name = "delbkpt", |
64 | .description = "delbkpt <number> - Delete breakpoint.", |
67 | .description = "delbkpt <number> - Delete breakpoint.", |
65 | .func = cmd_del_breakpoint, |
68 | .func = cmd_del_breakpoint, |
66 | .argc = 1, |
69 | .argc = 1, |
67 | .argv = &del_argv |
70 | .argv = &del_argv |
68 | }; |
71 | }; |
69 | 72 | ||
70 | static int cmd_add_breakpoint(cmd_arg_t *argv); |
73 | static int cmd_add_breakpoint(cmd_arg_t *argv); |
71 | static cmd_arg_t add_argv = { |
74 | static cmd_arg_t add_argv = { |
72 | .type = ARG_TYPE_INT |
75 | .type = ARG_TYPE_INT |
73 | }; |
76 | }; |
74 | static cmd_info_t addbkpt_info = { |
77 | static cmd_info_t addbkpt_info = { |
75 | .name = "addbkpt", |
78 | .name = "addbkpt", |
76 | .description = "addbkpt <&symbol> - new breakpoint.", |
79 | .description = "addbkpt <&symbol> - new breakpoint.", |
77 | .func = cmd_add_breakpoint, |
80 | .func = cmd_add_breakpoint, |
78 | .argc = 1, |
81 | .argc = 1, |
79 | .argv = &add_argv |
82 | .argv = &add_argv |
80 | }; |
83 | }; |
81 | 84 | ||
82 | static cmd_arg_t addw_argv = { |
85 | static cmd_arg_t addw_argv = { |
83 | .type = ARG_TYPE_INT |
86 | .type = ARG_TYPE_INT |
84 | }; |
87 | }; |
85 | static cmd_info_t addwatchp_info = { |
88 | static cmd_info_t addwatchp_info = { |
86 | .name = "addwatchp", |
89 | .name = "addwatchp", |
87 | .description = "addbwatchp <&symbol> - new write watchpoint.", |
90 | .description = "addbwatchp <&symbol> - new write watchpoint.", |
88 | .func = cmd_add_breakpoint, |
91 | .func = cmd_add_breakpoint, |
89 | .argc = 1, |
92 | .argc = 1, |
90 | .argv = &addw_argv |
93 | .argv = &addw_argv |
91 | }; |
94 | }; |
92 | 95 | ||
- | 96 | #endif |
|
93 | 97 | ||
94 | /** Print table of active breakpoints */ |
98 | /** Print table of active breakpoints */ |
95 | int cmd_print_breakpoints(cmd_arg_t *argv) |
99 | int cmd_print_breakpoints(cmd_arg_t *argv) |
96 | { |
100 | { |
97 | int i; |
101 | int i; |
98 | char *symbol; |
102 | char *symbol; |
99 | 103 | ||
100 | printf("Breakpoint table.\n"); |
104 | printf("Breakpoint table.\n"); |
101 | for (i=0; i < BKPOINTS_MAX; i++) |
105 | for (i=0; i < BKPOINTS_MAX; i++) |
102 | if (breakpoints[i].address) { |
106 | if (breakpoints[i].address) { |
103 | symbol = get_symtab_entry(breakpoints[i].address); |
107 | symbol = get_symtab_entry(breakpoints[i].address); |
104 | printf("%d. 0x%p in %s\n",i, |
108 | printf("%d. 0x%p in %s\n",i, |
105 | breakpoints[i].address, symbol); |
109 | breakpoints[i].address, symbol); |
106 | printf(" Count(%d) ", breakpoints[i].counter); |
110 | printf(" Count(%d) ", breakpoints[i].counter); |
107 | printf("\n"); |
111 | printf("\n"); |
108 | } |
112 | } |
109 | return 1; |
113 | return 1; |
110 | } |
114 | } |
111 | 115 | ||
- | 116 | /* Setup DR register according to table */ |
|
- | 117 | static void setup_dr(int curidx) |
|
- | 118 | { |
|
- | 119 | __native dr7; |
|
- | 120 | bpinfo_t *cur = &breakpoints[curidx]; |
|
- | 121 | int flags = breakpoints[curidx].flags; |
|
- | 122 | ||
- | 123 | /* Disable breakpoint in DR7 */ |
|
- | 124 | dr7 = read_dr7(); |
|
- | 125 | dr7 &= ~(0x2 << (curidx*2)); |
|
- | 126 | ||
- | 127 | if (cur->address) { /* Setup DR register */ |
|
- | 128 | /* Set breakpoint to debug registers */ |
|
- | 129 | switch (curidx) { |
|
- | 130 | case 0: |
|
- | 131 | write_dr0(cur->address); |
|
- | 132 | break; |
|
- | 133 | case 1: |
|
- | 134 | write_dr1(cur->address); |
|
- | 135 | break; |
|
- | 136 | case 2: |
|
- | 137 | write_dr2(cur->address); |
|
- | 138 | break; |
|
- | 139 | case 3: |
|
- | 140 | write_dr3(cur->address); |
|
- | 141 | break; |
|
- | 142 | } |
|
- | 143 | /* Set type to requested breakpoint & length*/ |
|
- | 144 | dr7 &= ~ (0x3 << (16 + 4*curidx)); |
|
- | 145 | dr7 &= ~ (0x3 << (18 + 4*curidx)); |
|
- | 146 | if ((flags & BKPOINT_INSTR)) { |
|
- | 147 | ; |
|
- | 148 | } else { |
|
- | 149 | if (sizeof(int) == 4) |
|
- | 150 | dr7 |= ((__native) 0x3) << (18 + 4*curidx); |
|
- | 151 | else /* 8 */ |
|
- | 152 | dr7 |= ((__native) 0x2) << (18 + 4*curidx); |
|
- | 153 | ||
- | 154 | if ((flags & BKPOINT_WRITE)) |
|
- | 155 | dr7 |= ((__native) 0x1) << (16 + 4*curidx); |
|
- | 156 | else if ((flags & BKPOINT_READ_WRITE)) |
|
- | 157 | dr7 |= ((__native) 0x3) << (16 + 4*curidx); |
|
- | 158 | } |
|
- | 159 | ||
- | 160 | /* Enable global breakpoint */ |
|
- | 161 | dr7 |= 0x2 << (curidx*2); |
|
- | 162 | ||
- | 163 | write_dr7(dr7); |
|
- | 164 | ||
- | 165 | } |
|
- | 166 | } |
|
- | 167 | ||
112 | /** Enable hardware breakpoint |
168 | /** Enable hardware breakpoint |
113 | * |
169 | * |
114 | * |
170 | * |
115 | * @param where Address of HW breakpoint |
171 | * @param where Address of HW breakpoint |
116 | * @param flags Type of breakpoint (EXECUTE, WRITE) |
172 | * @param flags Type of breakpoint (EXECUTE, WRITE) |
117 | * @return Debug slot on success, -1 - no available HW breakpoint |
173 | * @return Debug slot on success, -1 - no available HW breakpoint |
118 | */ |
174 | */ |
119 | int breakpoint_add(void * where, int flags) |
175 | int breakpoint_add(void * where, int flags, int curidx) |
120 | { |
176 | { |
121 | bpinfo_t *cur = NULL; |
- | |
122 | int curidx; |
- | |
123 | ipl_t ipl; |
177 | ipl_t ipl; |
124 | int i; |
178 | int i; |
125 | __native dr7; |
179 | bpinfo_t *cur; |
126 | 180 | ||
127 | ASSERT( flags & (BKPOINT_INSTR | BKPOINT_WRITE | BKPOINT_READ_WRITE)); |
181 | ASSERT( flags & (BKPOINT_INSTR | BKPOINT_WRITE | BKPOINT_READ_WRITE)); |
128 | 182 | ||
129 | ipl = interrupts_disable(); |
183 | ipl = interrupts_disable(); |
130 | spinlock_lock(&bkpoint_lock); |
184 | spinlock_lock(&bkpoint_lock); |
131 | 185 | ||
- | 186 | if (curidx == -1) { |
|
132 | /* Find free space in slots */ |
187 | /* Find free space in slots */ |
133 | for (i=0; i<BKPOINTS_MAX; i++) |
188 | for (i=0; i<BKPOINTS_MAX; i++) |
134 | if (!breakpoints[i].address) { |
189 | if (!breakpoints[i].address) { |
135 | cur = &breakpoints[i]; |
- | |
136 | curidx = i; |
190 | curidx = i; |
137 | break; |
191 | break; |
- | 192 | } |
|
- | 193 | if (curidx == -1) { |
|
- | 194 | /* Too many breakpoints */ |
|
- | 195 | spinlock_unlock(&bkpoint_lock); |
|
- | 196 | interrupts_restore(ipl); |
|
- | 197 | return -1; |
|
138 | } |
198 | } |
139 | if (!cur) { |
- | |
140 | /* Too many breakpoints */ |
- | |
141 | spinlock_unlock(&bkpoint_lock); |
- | |
142 | interrupts_restore(ipl); |
- | |
143 | return -1; |
- | |
144 | } |
199 | } |
- | 200 | cur = &breakpoints[curidx]; |
|
- | 201 | ||
145 | cur->address = (__address) where; |
202 | cur->address = (__address) where; |
146 | cur->flags = flags; |
203 | cur->flags = flags; |
147 | cur->counter = 0; |
204 | cur->counter = 0; |
148 | 205 | ||
149 | /* Set breakpoint to debug registers */ |
- | |
150 | switch (curidx) { |
206 | setup_dr(curidx); |
151 | case 0: |
- | |
152 | write_dr0(cur->address); |
- | |
153 | break; |
- | |
154 | case 1: |
- | |
155 | write_dr1(cur->address); |
- | |
156 | break; |
- | |
157 | case 2: |
- | |
158 | write_dr2(cur->address); |
- | |
159 | break; |
- | |
160 | case 3: |
- | |
161 | write_dr3(cur->address); |
- | |
162 | break; |
- | |
163 | } |
- | |
164 | dr7 = read_dr7(); |
- | |
165 | /* Set type to requested breakpoint & length*/ |
- | |
166 | dr7 &= ~ (0x3 << (16 + 4*curidx)); |
- | |
167 | dr7 &= ~ (0x3 << (18 + 4*curidx)); |
- | |
168 | if ((flags & BKPOINT_INSTR)) { |
- | |
169 | printf("Instr breakpoint\n"); |
- | |
170 | ; |
- | |
171 | } else { |
- | |
172 | if (sizeof(int) == 4) |
- | |
173 | dr7 |= 0x3 << (18 + 4*curidx); |
- | |
174 | else /* 8 */ |
- | |
175 | dr7 |= 0x2 << (18 + 4*curidx); |
- | |
176 | - | ||
177 | if ((flags & BKPOINT_WRITE)) |
- | |
178 | dr7 |= 0x1 << (16 + 4*curidx); |
- | |
179 | else if ((flags & BKPOINT_READ_WRITE)) |
- | |
180 | dr7 |= 0x3 << (16 + 4*curidx); |
- | |
181 | } |
- | |
182 | - | ||
183 | /* Enable global breakpoint */ |
- | |
184 | dr7 |= 0x2 << (curidx*2); |
- | |
185 | - | ||
186 | write_dr7(dr7); |
- | |
187 | 207 | ||
188 | spinlock_unlock(&bkpoint_lock); |
208 | spinlock_unlock(&bkpoint_lock); |
189 | interrupts_restore(ipl); |
209 | interrupts_restore(ipl); |
190 | 210 | ||
- | 211 | /* Send IPI */ |
|
- | 212 | #ifdef CONFIG_SMP |
|
- | 213 | // ipi_broadcast(VECTOR_DEBUG_IPI); |
|
- | 214 | #endif |
|
- | 215 | ||
191 | return curidx; |
216 | return curidx; |
192 | } |
217 | } |
193 | 218 | ||
194 | #ifdef amd64 |
219 | #ifdef amd64 |
195 | # define getip(x) ((x)->rip) |
220 | # define getip(x) ((x)->rip) |
196 | #else |
221 | #else |
197 | # define getip(x) ((x)->eip) |
222 | # define getip(x) ((x)->eip) |
198 | #endif |
223 | #endif |
199 | 224 | ||
200 | static void handle_exception(int slot, istate_t *istate) |
225 | static void handle_exception(int slot, istate_t *istate) |
201 | { |
226 | { |
202 | ASSERT(breakpoints[slot].address); |
227 | ASSERT(breakpoints[slot].address); |
203 | 228 | ||
204 | /* Handle zero checker */ |
229 | /* Handle zero checker */ |
205 | if (! (breakpoints[slot].flags & BKPOINT_INSTR)) { |
230 | if (! (breakpoints[slot].flags & BKPOINT_INSTR)) { |
206 | if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) { |
231 | if ((breakpoints[slot].flags & BKPOINT_CHECK_ZERO)) { |
207 | if (*((__native *) breakpoints[slot].address) != 0) |
232 | if (*((__native *) breakpoints[slot].address) != 0) |
208 | return; |
233 | return; |
209 | printf("**** Found ZERO on address %P ****\n", |
234 | printf("**** Found ZERO on address %P ****\n", |
210 | slot, breakpoints[slot].address); |
235 | slot, breakpoints[slot].address); |
211 | } else { |
236 | } else { |
212 | printf("Data watchpoint - new data: %P\n", |
237 | printf("Data watchpoint - new data: %P\n", |
213 | *((__native *) breakpoints[slot].address)); |
238 | *((__native *) breakpoints[slot].address)); |
214 | } |
239 | } |
215 | } |
240 | } |
216 | printf("Reached breakpoint %d:%P(%s)\n", slot, getip(istate), |
241 | printf("Reached breakpoint %d:%P(%s)\n", slot, getip(istate), |
217 | get_symtab_entry(getip(istate))); |
242 | get_symtab_entry(getip(istate))); |
218 | printf("***Type 'exit' to exit kconsole.\n"); |
243 | printf("***Type 'exit' to exit kconsole.\n"); |
219 | atomic_set(&haltstate,1); |
244 | atomic_set(&haltstate,1); |
220 | kconsole("debug"); |
245 | kconsole("debug"); |
221 | atomic_set(&haltstate,0); |
246 | atomic_set(&haltstate,0); |
222 | } |
247 | } |
223 | 248 | ||
224 | static void debug_exception(int n, istate_t *istate) |
- | |
225 | { |
- | |
226 | __native dr6; |
- | |
227 | int i; |
- | |
228 | - | ||
229 | /* Set RF to restart the instruction */ |
- | |
230 | #ifdef amd64 |
- | |
231 | istate->rflags |= RFLAGS_RF; |
- | |
232 | #else |
- | |
233 | istate->eflags |= EFLAGS_RF; |
- | |
234 | #endif |
- | |
235 | - | ||
236 | dr6 = read_dr6(); |
- | |
237 | for (i=0; i < BKPOINTS_MAX; i++) { |
- | |
238 | if (dr6 & (1 << i)) { |
- | |
239 | dr6 &= ~ (1 << i); |
- | |
240 | write_dr6(dr6); |
- | |
241 | - | ||
242 | handle_exception(i, istate); |
- | |
243 | } |
- | |
244 | } |
- | |
245 | } |
- | |
246 | - | ||
247 | void breakpoint_del(int slot) |
249 | void breakpoint_del(int slot) |
248 | { |
250 | { |
249 | bpinfo_t *cur; |
251 | bpinfo_t *cur; |
250 | ipl_t ipl; |
252 | ipl_t ipl; |
251 | __native dr7; |
- | |
252 | 253 | ||
253 | ipl = interrupts_disable(); |
254 | ipl = interrupts_disable(); |
254 | spinlock_lock(&bkpoint_lock); |
255 | spinlock_lock(&bkpoint_lock); |
255 | 256 | ||
256 | cur = &breakpoints[slot]; |
257 | cur = &breakpoints[slot]; |
257 | if (!cur->address) { |
258 | if (!cur->address) { |
258 | spinlock_unlock(&bkpoint_lock); |
259 | spinlock_unlock(&bkpoint_lock); |
259 | interrupts_restore(ipl); |
260 | interrupts_restore(ipl); |
260 | return; |
261 | return; |
261 | } |
262 | } |
262 | 263 | ||
263 | cur->address = NULL; |
264 | cur->address = NULL; |
264 | 265 | ||
265 | /* Disable breakpoint in DR7 */ |
- | |
266 | dr7 = read_dr7(); |
- | |
267 | dr7 &= ~(0x2 << (slot*2)); |
- | |
268 | write_dr7(dr7); |
266 | setup_dr(slot); |
269 | 267 | ||
270 | spinlock_unlock(&bkpoint_lock); |
268 | spinlock_unlock(&bkpoint_lock); |
271 | interrupts_restore(ipl); |
269 | interrupts_restore(ipl); |
- | 270 | #ifdef CONFIG_SMP |
|
- | 271 | // ipi_broadcast(VECTOR_DEBUG_IPI); |
|
- | 272 | #endif |
|
272 | } |
273 | } |
273 | 274 | ||
- | 275 | #ifndef CONFIG_DEBUG_AS_WATCHPOINT |
|
- | 276 | ||
274 | /** Remove breakpoint from table */ |
277 | /** Remove breakpoint from table */ |
275 | int cmd_del_breakpoint(cmd_arg_t *argv) |
278 | int cmd_del_breakpoint(cmd_arg_t *argv) |
276 | { |
279 | { |
277 | if (argv->intval < 0 || argv->intval > BKPOINTS_MAX) { |
280 | if (argv->intval < 0 || argv->intval > BKPOINTS_MAX) { |
278 | printf("Invalid breakpoint number.\n"); |
281 | printf("Invalid breakpoint number.\n"); |
279 | return 0; |
282 | return 0; |
280 | } |
283 | } |
281 | breakpoint_del(argv->intval); |
284 | breakpoint_del(argv->intval); |
282 | return 1; |
285 | return 1; |
283 | } |
286 | } |
284 | 287 | ||
285 | /** Add new breakpoint to table */ |
288 | /** Add new breakpoint to table */ |
286 | static int cmd_add_breakpoint(cmd_arg_t *argv) |
289 | static int cmd_add_breakpoint(cmd_arg_t *argv) |
287 | { |
290 | { |
288 | int flags; |
291 | int flags; |
- | 292 | int id; |
|
289 | 293 | ||
290 | if (argv == &add_argv) { |
294 | if (argv == &add_argv) { |
291 | flags = BKPOINT_INSTR; |
295 | flags = BKPOINT_INSTR; |
292 | } else { /* addwatchp */ |
296 | } else { /* addwatchp */ |
293 | flags = BKPOINT_WRITE; |
297 | flags = BKPOINT_WRITE; |
294 | } |
298 | } |
295 | printf("Adding breakpoint on address: %p\n", argv->intval); |
299 | printf("Adding breakpoint on address: %p\n", argv->intval); |
296 | if (breakpoint_add((void *)argv->intval, flags)) |
300 | id = breakpoint_add((void *)argv->intval, flags, -1); |
- | 301 | if (id < 0) |
|
297 | printf("Add breakpoint failed.\n"); |
302 | printf("Add breakpoint failed.\n"); |
- | 303 | else |
|
- | 304 | printf("Added breakpoint %d.\n", id); |
|
298 | 305 | ||
299 | return 1; |
306 | return 1; |
300 | } |
307 | } |
- | 308 | #endif |
|
- | 309 | ||
- | 310 | static void debug_exception(int n, istate_t *istate) |
|
- | 311 | { |
|
- | 312 | __native dr6; |
|
- | 313 | int i; |
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- | 314 | ||
- | 315 | /* Set RF to restart the instruction */ |
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- | 316 | #ifdef amd64 |
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- | 317 | istate->rflags |= RFLAGS_RF; |
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- | 318 | #else |
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- | 319 | istate->eflags |= EFLAGS_RF; |
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- | 320 | #endif |
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- | 321 | ||
- | 322 | dr6 = read_dr6(); |
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- | 323 | for (i=0; i < BKPOINTS_MAX; i++) { |
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- | 324 | if (dr6 & (1 << i)) { |
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- | 325 | dr6 &= ~ (1 << i); |
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- | 326 | write_dr6(dr6); |
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- | 327 | ||
- | 328 | handle_exception(i, istate); |
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- | 329 | } |
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- | 330 | } |
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- | 331 | } |
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- | 332 | ||
- | 333 | #ifdef CONFIG_SMP |
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- | 334 | static void debug_ipi(int n, istate_t *istate) |
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- | 335 | { |
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- | 336 | int i; |
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- | 337 | ||
- | 338 | spinlock_lock(&bkpoint_lock); |
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- | 339 | for (i=0; i < BKPOINTS_MAX; i++) |
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- | 340 | setup_dr(i); |
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- | 341 | spinlock_unlock(&bkpoint_lock); |
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- | 342 | } |
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- | 343 | #endif |
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301 | 344 | ||
302 | /** Initialize debugger */ |
345 | /** Initialize debugger */ |
303 | void debugger_init() |
346 | void debugger_init() |
304 | { |
347 | { |
305 | int i; |
348 | int i; |
306 | 349 | ||
307 | for (i=0; i<BKPOINTS_MAX; i++) |
350 | for (i=0; i<BKPOINTS_MAX; i++) |
308 | breakpoints[i].address = NULL; |
351 | breakpoints[i].address = NULL; |
309 | 352 | ||
310 | cmd_initialize(&bkpts_info); |
353 | cmd_initialize(&bkpts_info); |
311 | if (!cmd_register(&bkpts_info)) |
354 | if (!cmd_register(&bkpts_info)) |
312 | panic("could not register command %s\n", bkpts_info.name); |
355 | panic("could not register command %s\n", bkpts_info.name); |
313 | 356 | ||
- | 357 | #ifndef CONFIG_DEBUG_AS_WATCHPOINT |
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314 | cmd_initialize(&delbkpt_info); |
358 | cmd_initialize(&delbkpt_info); |
315 | if (!cmd_register(&delbkpt_info)) |
359 | if (!cmd_register(&delbkpt_info)) |
316 | panic("could not register command %s\n", delbkpt_info.name); |
360 | panic("could not register command %s\n", delbkpt_info.name); |
317 | 361 | ||
318 | cmd_initialize(&addbkpt_info); |
362 | cmd_initialize(&addbkpt_info); |
319 | if (!cmd_register(&addbkpt_info)) |
363 | if (!cmd_register(&addbkpt_info)) |
320 | panic("could not register command %s\n", addbkpt_info.name); |
364 | panic("could not register command %s\n", addbkpt_info.name); |
321 | 365 | ||
322 | cmd_initialize(&addwatchp_info); |
366 | cmd_initialize(&addwatchp_info); |
323 | if (!cmd_register(&addwatchp_info)) |
367 | if (!cmd_register(&addwatchp_info)) |
324 | panic("could not register command %s\n", addwatchp_info.name); |
368 | panic("could not register command %s\n", addwatchp_info.name); |
- | 369 | #endif |
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325 | 370 | ||
326 | exc_register(VECTOR_DEBUG, "debugger", |
371 | exc_register(VECTOR_DEBUG, "debugger", |
327 | debug_exception); |
372 | debug_exception); |
- | 373 | #ifdef CONFIG_SMP |
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- | 374 | exc_register(VECTOR_DEBUG_IPI, "debugger_smp", |
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- | 375 | debug_ipi); |
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- | 376 | #endif |
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328 | } |
377 | } |
329 | 378 |