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2924 | svoboda | 1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup debug |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <stdio.h> |
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36 | #include <stdlib.h> |
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37 | #include <sys/types.h> |
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38 | #include <udebug.h> |
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39 | #include <kernel/arch/context_offset.h> |
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40 | |||
2936 | svoboda | 41 | #include "../../../cons.h" |
2924 | svoboda | 42 | #include "../../../main.h" |
43 | #include "../../../include/arch.h" |
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44 | |||
45 | #define OPCODE_BREAK 0x0000000d |
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46 | |||
47 | void arch_breakpoint_add(uintptr_t addr) |
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48 | { |
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49 | uint32_t brkp; |
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50 | int rc; |
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51 | breakpoint_t *brk; |
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52 | int i; |
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53 | |||
54 | brk = NULL; |
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55 | for (i = 0; i < MAX_BRKPTS; i++) |
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56 | if (brk_list[i].set == 0) { |
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57 | brk = brk_list+i; |
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58 | break; |
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59 | } |
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60 | |||
61 | if (!brk) { |
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2936 | svoboda | 62 | cons_printf("too many breakpoints\n"); |
2924 | svoboda | 63 | return; |
64 | } |
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65 | |||
66 | rc = udebug_mem_read(app_phone, &brk->arch.back, addr, sizeof(&brk->arch.back)); |
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2936 | svoboda | 67 | cons_printf("udebug_mem_read() -> %d\n", rc); |
2924 | svoboda | 68 | brkp = OPCODE_BREAK; |
69 | rc = udebug_mem_write(app_phone, &brkp, addr, sizeof(brkp)); |
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70 | // for (i=0; i<256; i++) rc = udebug_mem_write(app_phone, &brkp, addr+4*i, sizeof(brkp)); |
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2936 | svoboda | 71 | cons_printf("udebug_mem_write() -> %d\n", rc); |
2924 | svoboda | 72 | |
73 | brk->addr = addr; |
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74 | brk->set = 1; |
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75 | } |
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76 | |||
77 | static unsigned buffer[1024]; |
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78 | static breakpoint_t *lifted_brkpt; |
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79 | |||
80 | void arch_event_breakpoint(thash_t thread_hash) |
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81 | { |
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82 | int rc; |
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83 | uint32_t epc; |
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84 | int brk_addr; |
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85 | uint32_t brkp; |
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86 | |||
87 | brkp = OPCODE_BREAK; |
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88 | |||
89 | rc = udebug_regs_read(app_phone, thread_hash, buffer); |
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2936 | svoboda | 90 | cons_printf("udebug_regs_read -> %d\n", rc); |
2924 | svoboda | 91 | epc = buffer[EOFFSET_EPC/sizeof(unsigned)]; |
2936 | svoboda | 92 | cons_printf("EPC was 0x%08x\n", epc); |
2924 | svoboda | 93 | brk_addr = epc; |
94 | |||
95 | int bi; |
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96 | for (bi = 0; bi < MAX_BRKPTS; bi++) { |
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97 | if (brk_list[bi].set && brk_list[bi].addr == brk_addr) |
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98 | break; |
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99 | } |
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100 | if (bi < MAX_BRKPTS) { |
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2936 | svoboda | 101 | cons_printf("breakpoint %d hit\n", bi); |
2935 | svoboda | 102 | breakpoint_hit(); |
103 | |||
2924 | svoboda | 104 | rc = udebug_mem_write(app_phone, &brk_list[bi].arch.back, brk_addr, 4); |
2936 | svoboda | 105 | cons_printf("udebug_mem_write(phone, 0x%x, 0x%02x, 1) -> %d\n", brk_addr, brk_list[bi].arch.back, rc); |
2924 | svoboda | 106 | rc = udebug_mem_read(app_phone, &brk_list[bi].arch.back, brk_addr+4, 4); |
107 | rc = udebug_mem_write(app_phone, &brkp, brk_addr+4, 4); |
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108 | lifted_brkpt = &brk_list[bi]; |
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109 | return; |
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110 | } |
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111 | |||
112 | for (bi = 0; bi < MAX_BRKPTS; bi++) { |
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113 | if (brk_list[bi].set && brk_list[bi].addr + 4 == brk_addr) |
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114 | break; |
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115 | } |
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116 | if (bi < MAX_BRKPTS) { |
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2936 | svoboda | 117 | cons_printf("restoring breakpoint %d\n", bi); |
2924 | svoboda | 118 | rc = udebug_mem_write(app_phone, &brk_list[bi].arch.back, brk_addr, 4); |
119 | rc = udebug_mem_read(app_phone, &brk_list[bi].arch.back, brk_addr-4, 4); |
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120 | rc = udebug_mem_write(app_phone, &brkp, brk_addr-4, 4); |
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121 | lifted_brkpt = NULL; |
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122 | return; |
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123 | } |
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124 | |||
2936 | svoboda | 125 | cons_printf("unrecognized breakpoint at 0x%x\n", brk_addr); |
2924 | svoboda | 126 | } |
127 | |||
2942 | svoboda | 128 | void arch_event_trap(dthread_t *dt) |
2924 | svoboda | 129 | { |
130 | /* Unused */ |
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2942 | svoboda | 131 | (void)dt; |
2924 | svoboda | 132 | } |
133 | |||
2941 | svoboda | 134 | void arch_dump_regs(thash_t thash) |
135 | { |
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136 | } |
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137 | |||
2942 | svoboda | 138 | void arch_set_singlestep(dthread_t *dt, int enable) |
139 | { |
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140 | } |
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141 | |||
2943 | svoboda | 142 | void arch_breakpoint_remove(int id) |
143 | { |
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144 | } |
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145 | |||
146 | void arch_breakpoint_list(void) |
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147 | { |
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148 | } |
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149 | |||
2924 | svoboda | 150 | /** @} |
151 | */ |