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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
2 | * Copyright (c) 2008 Jiri Svoboda |
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 | /** @addtogroup debug |
29 | /** @addtogroup debug |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <stdio.h> |
35 | #include <stdio.h> |
36 | #include <stdlib.h> |
36 | #include <stdlib.h> |
37 | #include <sys/types.h> |
37 | #include <sys/types.h> |
38 | #include <udebug.h> |
38 | #include <udebug.h> |
39 | 39 | ||
40 | #include "../../../main.h" |
40 | #include "../../../main.h" |
41 | #include "../../../include/arch.h" |
41 | #include "../../../include/arch.h" |
42 | 42 | ||
43 | #define OPCODE_INT3 0xCC |
43 | #define OPCODE_INT3 0xCC |
44 | 44 | ||
45 | #define ISTATE_OFF_EIP 12 |
45 | #define ISTATE_OFF_EIP 12 |
46 | #define ISTATE_OFF_EFLAGS 14 |
46 | #define ISTATE_OFF_EFLAGS 14 |
47 | 47 | ||
48 | void arch_breakpoint_add(uintptr_t addr) |
48 | void arch_breakpoint_add(uintptr_t addr) |
49 | { |
49 | { |
50 | char brkp[1]; |
50 | char brkp[1]; |
51 | int rc; |
51 | int rc; |
52 | breakpoint_t *brk; |
52 | breakpoint_t *brk; |
53 | int i; |
53 | int i; |
54 | 54 | ||
55 | brk = NULL; |
55 | brk = NULL; |
56 | for (i = 0; i < MAX_BRKPTS; i++) |
56 | for (i = 0; i < MAX_BRKPTS; i++) |
57 | if (brk_list[i].set == 0) brk = brk_list+i; |
57 | if (brk_list[i].set == 0) brk = brk_list+i; |
58 | 58 | ||
59 | if (!brk) { |
59 | if (!brk) { |
60 | printf("too many breakpoints\n"); |
60 | printf("too many breakpoints\n"); |
61 | return; |
61 | return; |
62 | } |
62 | } |
63 | 63 | ||
64 | rc = udebug_mem_read(app_phone, &brk->arch.back, addr, 1); |
64 | rc = udebug_mem_read(app_phone, &brk->arch.back, addr, 1); |
65 | printf("udebug_mem_read() -> %d\n", rc); |
65 | printf("udebug_mem_read() -> %d\n", rc); |
66 | brkp[0] = OPCODE_INT3; |
66 | brkp[0] = OPCODE_INT3; |
67 | rc = udebug_mem_write(app_phone, brkp, addr, 1); |
67 | rc = udebug_mem_write(app_phone, brkp, addr, 1); |
68 | printf("udebug_mem_write() -> %d\n", rc); |
68 | printf("udebug_mem_write() -> %d\n", rc); |
69 | 69 | ||
70 | brk->addr = addr; |
70 | brk->addr = addr; |
71 | brk->set = 1; |
71 | brk->set = 1; |
72 | } |
72 | } |
73 | 73 | ||
74 | static unsigned buffer[1024]; |
74 | static unsigned buffer[1024]; |
75 | static breakpoint_t *lifted_brkpt; |
75 | static breakpoint_t *lifted_brkpt; |
76 | 76 | ||
77 | void arch_event_breakpoint(thash_t thread_hash) |
77 | void arch_event_breakpoint(thash_t thread_hash) |
78 | { |
78 | { |
79 | int rc; |
79 | int rc; |
80 | 80 | ||
81 | rc = udebug_regs_read(app_phone, thread_hash, buffer); |
81 | rc = udebug_regs_read(app_phone, thread_hash, buffer); |
82 | printf("udebug_regs_read -> %d\n", rc); |
82 | printf("udebug_regs_read -> %d\n", rc); |
83 | printf("EIP was 0x%08x\n", buffer[ISTATE_OFF_EIP]); |
83 | printf("EIP was 0x%08x\n", buffer[ISTATE_OFF_EIP]); |
84 | int brk_addr = buffer[ISTATE_OFF_EIP] - 1; |
84 | int brk_addr = buffer[ISTATE_OFF_EIP] - 1; |
85 | int bi; |
85 | int bi; |
86 | for (bi = 0; bi < MAX_BRKPTS; bi++) { |
86 | for (bi = 0; bi < MAX_BRKPTS; bi++) { |
87 | if (brk_list[bi].set && brk_list[bi].addr == brk_addr) |
87 | if (brk_list[bi].set && brk_list[bi].addr == brk_addr) |
88 | break; |
88 | break; |
89 | } |
89 | } |
- | 90 | ||
90 | if (bi < MAX_BRKPTS) { |
91 | if (bi < MAX_BRKPTS) { |
- | 92 | printf("breakpoint %d hit\n", bi); |
|
- | 93 | ||
91 | buffer[ISTATE_OFF_EIP] = brk_addr; |
94 | buffer[ISTATE_OFF_EIP] = brk_addr; |
92 | buffer[ISTATE_OFF_EFLAGS] |= 0x0100; /* trap flag */ |
95 | buffer[ISTATE_OFF_EFLAGS] |= 0x0100; /* trap flag */ |
93 | printf("setting EIP to 0x%08x\n", buffer[ISTATE_OFF_EIP]); |
96 | printf("setting EIP to 0x%08x\n", buffer[ISTATE_OFF_EIP]); |
94 | rc = udebug_regs_write(app_phone, thread_hash, buffer); |
97 | rc = udebug_regs_write(app_phone, thread_hash, buffer); |
95 | rc = udebug_mem_write(app_phone, &brk_list[bi].arch.back, brk_addr, 1); |
98 | rc = udebug_mem_write(app_phone, &brk_list[bi].arch.back, brk_addr, 1); |
96 | printf("udebug_mem_write(phone, 0x%x, 0x%02x, 1) -> %d\n", brk_addr, brk_list[bi].arch.back, rc); |
99 | printf("udebug_mem_write(phone, 0x%x, 0x%02x, 1) -> %d\n", brk_addr, brk_list[bi].arch.back, rc); |
97 | lifted_brkpt = &brk_list[bi]; |
100 | lifted_brkpt = &brk_list[bi]; |
98 | } else { |
101 | } else { |
99 | printf("unrecognized breakpoint at 0x%x\n", brk_addr); |
102 | printf("unrecognized breakpoint at 0x%x\n", brk_addr); |
100 | } |
103 | } |
101 | } |
104 | } |
102 | 105 | ||
103 | void arch_event_trap(thash_t thread_hash) |
106 | void arch_event_trap(thash_t thread_hash) |
104 | { |
107 | { |
105 | unsigned char brkinstr[1]; |
108 | unsigned char brkinstr[1]; |
106 | int rc; |
109 | int rc; |
107 | 110 | ||
- | 111 | printf("trap event\n"); |
|
- | 112 | ||
108 | breakpoint_t *lb = lifted_brkpt; |
113 | breakpoint_t *lb = lifted_brkpt; |
109 | brkinstr[0] = OPCODE_INT3; |
114 | brkinstr[0] = OPCODE_INT3; |
110 | rc = udebug_mem_write(app_phone, brkinstr, lb->addr, 1); |
115 | rc = udebug_mem_write(app_phone, brkinstr, lb->addr, 1); |
111 | printf("restore breakpoint -> %d\n", rc); |
116 | printf("restore breakpoint -> %d\n", rc); |
112 | 117 | ||
113 | rc = udebug_regs_read(app_phone, thread_hash, buffer); |
118 | rc = udebug_regs_read(app_phone, thread_hash, buffer); |
114 | printf("udebug_regs_read -> %d\n", rc); |
119 | printf("udebug_regs_read -> %d\n", rc); |
115 | buffer[ISTATE_OFF_EFLAGS] &= ~0x0100; /* trap flag */ |
120 | buffer[ISTATE_OFF_EFLAGS] &= ~0x0100; /* trap flag */ |
116 | rc = udebug_regs_write(app_phone, thread_hash, buffer); |
121 | rc = udebug_regs_write(app_phone, thread_hash, buffer); |
117 | } |
122 | } |
118 | 123 | ||
119 | /** @} |
124 | /** @} |
120 | */ |
125 | */ |
121 | 126 |