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| Rev | Author | Line No. | Line |
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| 614 | palkovsky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Ondrej Palkovsky |
| 614 | palkovsky | 3 | * All rights reserved. |
| 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 | |||
| 1888 | jermar | 29 | /** @addtogroup mips32debug |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 614 | palkovsky | 35 | #include <arch/debugger.h> |
| 36 | #include <memstr.h> |
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| 37 | #include <console/kconsole.h> |
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| 38 | #include <console/cmd.h> |
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| 39 | #include <symtab.h> |
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| 40 | #include <print.h> |
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| 41 | #include <panic.h> |
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| 42 | #include <arch.h> |
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| 43 | #include <arch/cp0.h> |
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| 44 | #include <func.h> |
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| 45 | |||
| 46 | bpinfo_t breakpoints[BKPOINTS_MAX]; |
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| 623 | jermar | 47 | SPINLOCK_INITIALIZE(bkpoint_lock); |
| 614 | palkovsky | 48 | |
| 49 | static int cmd_print_breakpoints(cmd_arg_t *argv); |
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| 673 | jermar | 50 | static cmd_info_t bkpts_info = { |
| 51 | .name = "bkpts", |
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| 614 | palkovsky | 52 | .description = "Print breakpoint table.", |
| 53 | .func = cmd_print_breakpoints, |
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| 54 | .argc = 0, |
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| 55 | }; |
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| 56 | |||
| 57 | static int cmd_del_breakpoint(cmd_arg_t *argv); |
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| 58 | static cmd_arg_t del_argv = { |
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| 59 | .type = ARG_TYPE_INT |
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| 60 | }; |
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| 61 | static cmd_info_t delbkpt_info = { |
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| 62 | .name = "delbkpt", |
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| 63 | .description = "delbkpt <number> - Delete breakpoint.", |
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| 64 | .func = cmd_del_breakpoint, |
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| 65 | .argc = 1, |
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| 66 | .argv = &del_argv |
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| 67 | }; |
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| 68 | |||
| 69 | static int cmd_add_breakpoint(cmd_arg_t *argv); |
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| 70 | static cmd_arg_t add_argv = { |
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| 71 | .type = ARG_TYPE_INT |
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| 72 | }; |
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| 73 | static cmd_info_t addbkpt_info = { |
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| 74 | .name = "addbkpt", |
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| 75 | .description = "addbkpt <&symbol> - new bkpoint. Break on J/Branch insts unsupported.", |
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| 76 | .func = cmd_add_breakpoint, |
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| 77 | .argc = 1, |
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| 78 | .argv = &add_argv |
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| 79 | }; |
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| 80 | |||
| 635 | palkovsky | 81 | static cmd_arg_t adde_argv[] = { |
| 82 | { .type = ARG_TYPE_INT }, |
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| 83 | { .type = ARG_TYPE_INT } |
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| 84 | }; |
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| 85 | static cmd_info_t addbkpte_info = { |
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| 86 | .name = "addbkpte", |
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| 87 | .description = "addebkpte <&symbol> <&func> - new bkpoint. Call func(or Nothing if 0).", |
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| 88 | .func = cmd_add_breakpoint, |
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| 89 | .argc = 2, |
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| 90 | .argv = adde_argv |
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| 91 | }; |
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| 92 | |||
| 93 | static struct { |
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| 1780 | jermar | 94 | uint32_t andmask; |
| 95 | uint32_t value; |
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| 635 | palkovsky | 96 | }jmpinstr[] = { |
| 97 | {0xf3ff0000, 0x41000000}, /* BCzF */ |
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| 98 | {0xf3ff0000, 0x41020000}, /* BCzFL */ |
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| 99 | {0xf3ff0000, 0x41010000}, /* BCzT */ |
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| 100 | {0xf3ff0000, 0x41030000}, /* BCzTL */ |
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| 101 | {0xfc000000, 0x10000000}, /* BEQ */ |
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| 102 | {0xfc000000, 0x50000000}, /* BEQL */ |
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| 103 | {0xfc1f0000, 0x04010000}, /* BEQL */ |
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| 104 | {0xfc1f0000, 0x04110000}, /* BGEZAL */ |
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| 105 | {0xfc1f0000, 0x04130000}, /* BGEZALL */ |
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| 106 | {0xfc1f0000, 0x04030000}, /* BGEZL */ |
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| 107 | {0xfc1f0000, 0x1c000000}, /* BGTZ */ |
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| 108 | {0xfc1f0000, 0x5c000000}, /* BGTZL */ |
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| 109 | {0xfc1f0000, 0x18000000}, /* BLEZ */ |
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| 110 | {0xfc1f0000, 0x58000000}, /* BLEZL */ |
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| 111 | {0xfc1f0000, 0x04000000}, /* BLTZ */ |
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| 112 | {0xfc1f0000, 0x04100000}, /* BLTZAL */ |
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| 113 | {0xfc1f0000, 0x04120000}, /* BLTZALL */ |
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| 114 | {0xfc1f0000, 0x04020000}, /* BLTZL */ |
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| 115 | {0xfc000000, 0x14000000}, /* BNE */ |
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| 116 | {0xfc000000, 0x54000000}, /* BNEL */ |
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| 117 | {0xfc000000, 0x08000000}, /* J */ |
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| 118 | {0xfc000000, 0x0c000000}, /* JAL */ |
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| 119 | {0xfc1f07ff, 0x00000009}, /* JALR */ |
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| 120 | {0,0} /* EndOfTable */ |
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| 121 | }; |
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| 122 | |||
| 123 | /** Test, if the given instruction is a jump or branch instruction |
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| 124 | * |
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| 125 | * @param instr Instruction code |
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| 126 | * @return true - it is jump instruction, false otherwise |
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| 127 | */ |
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| 1780 | jermar | 128 | static bool is_jump(unative_t instr) |
| 635 | palkovsky | 129 | { |
| 130 | int i; |
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| 131 | |||
| 132 | for (i=0;jmpinstr[i].andmask;i++) { |
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| 133 | if ((instr & jmpinstr[i].andmask) == jmpinstr[i].value) |
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| 134 | return true; |
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| 135 | } |
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| 136 | |||
| 137 | return false; |
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| 138 | } |
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| 139 | |||
| 614 | palkovsky | 140 | /** Add new breakpoint to table */ |
| 141 | int cmd_add_breakpoint(cmd_arg_t *argv) |
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| 142 | { |
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| 143 | bpinfo_t *cur = NULL; |
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| 144 | ipl_t ipl; |
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| 145 | int i; |
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| 146 | |||
| 147 | if (argv->intval & 0x3) { |
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| 148 | printf("Not aligned instruction, forgot to use &symbol?\n"); |
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| 149 | return 1; |
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| 150 | } |
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| 151 | ipl = interrupts_disable(); |
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| 152 | spinlock_lock(&bkpoint_lock); |
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| 153 | |||
| 154 | /* Check, that the breakpoints do not conflict */ |
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| 155 | for (i=0; i<BKPOINTS_MAX; i++) { |
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| 1780 | jermar | 156 | if (breakpoints[i].address == (uintptr_t)argv->intval) { |
| 614 | palkovsky | 157 | printf("Duplicate breakpoint %d.\n", i); |
| 158 | spinlock_unlock(&bkpoints_lock); |
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| 159 | return 0; |
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| 1780 | jermar | 160 | } else if (breakpoints[i].address == (uintptr_t)argv->intval + sizeof(unative_t) || \ |
| 161 | breakpoints[i].address == (uintptr_t)argv->intval - sizeof(unative_t)) { |
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| 614 | palkovsky | 162 | printf("Adjacent breakpoints not supported, conflict with %d.\n", i); |
| 163 | spinlock_unlock(&bkpoints_lock); |
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| 164 | return 0; |
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| 165 | } |
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| 166 | |||
| 167 | } |
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| 168 | |||
| 169 | for (i=0; i<BKPOINTS_MAX; i++) |
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| 170 | if (!breakpoints[i].address) { |
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| 171 | cur = &breakpoints[i]; |
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| 172 | break; |
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| 173 | } |
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| 174 | if (!cur) { |
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| 175 | printf("Too many breakpoints.\n"); |
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| 176 | spinlock_unlock(&bkpoint_lock); |
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| 177 | interrupts_restore(ipl); |
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| 178 | return 0; |
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| 179 | } |
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| 1780 | jermar | 180 | cur->address = (uintptr_t) argv->intval; |
| 614 | palkovsky | 181 | printf("Adding breakpoint on address: %p\n", argv->intval); |
| 1780 | jermar | 182 | cur->instruction = ((unative_t *)cur->address)[0]; |
| 183 | cur->nextinstruction = ((unative_t *)cur->address)[1]; |
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| 635 | palkovsky | 184 | if (argv == &add_argv) { |
| 185 | cur->flags = 0; |
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| 186 | } else { /* We are add extended */ |
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| 187 | cur->flags = BKPOINT_FUNCCALL; |
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| 958 | jermar | 188 | cur->bkfunc = (void (*)(void *, istate_t *)) argv[1].intval; |
| 635 | palkovsky | 189 | } |
| 190 | if (is_jump(cur->instruction)) |
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| 191 | cur->flags |= BKPOINT_ONESHOT; |
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| 192 | cur->counter = 0; |
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| 614 | palkovsky | 193 | |
| 194 | /* Set breakpoint */ |
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| 1780 | jermar | 195 | *((unative_t *)cur->address) = 0x0d; |
| 614 | palkovsky | 196 | |
| 197 | spinlock_unlock(&bkpoint_lock); |
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| 198 | interrupts_restore(ipl); |
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| 199 | |||
| 200 | return 1; |
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| 201 | } |
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| 202 | |||
| 635 | palkovsky | 203 | |
| 204 | |||
| 614 | palkovsky | 205 | /** Remove breakpoint from table */ |
| 206 | int cmd_del_breakpoint(cmd_arg_t *argv) |
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| 207 | { |
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| 208 | bpinfo_t *cur; |
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| 209 | ipl_t ipl; |
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| 210 | |||
| 2745 | decky | 211 | if (argv->intval > BKPOINTS_MAX) { |
| 614 | palkovsky | 212 | printf("Invalid breakpoint number.\n"); |
| 213 | return 0; |
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| 214 | } |
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| 215 | ipl = interrupts_disable(); |
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| 216 | spinlock_lock(&bkpoint_lock); |
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| 217 | |||
| 218 | cur = &breakpoints[argv->intval]; |
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| 219 | if (!cur->address) { |
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| 220 | printf("Breakpoint does not exist.\n"); |
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| 221 | spinlock_unlock(&bkpoint_lock); |
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| 222 | interrupts_restore(ipl); |
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| 223 | return 0; |
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| 224 | } |
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| 635 | palkovsky | 225 | if ((cur->flags & BKPOINT_INPROG) && (cur->flags & BKPOINT_ONESHOT)) { |
| 226 | printf("Cannot remove one-shot breakpoint in-progress\n"); |
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| 227 | spinlock_unlock(&bkpoint_lock); |
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| 228 | interrupts_restore(ipl); |
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| 229 | return 0; |
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| 230 | } |
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| 1780 | jermar | 231 | ((uint32_t *)cur->address)[0] = cur->instruction; |
| 232 | ((uint32_t *)cur->address)[1] = cur->nextinstruction; |
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| 614 | palkovsky | 233 | |
| 234 | cur->address = NULL; |
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| 235 | |||
| 236 | spinlock_unlock(&bkpoint_lock); |
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| 237 | interrupts_restore(ipl); |
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| 238 | return 1; |
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| 239 | } |
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| 240 | |||
| 241 | /** Print table of active breakpoints */ |
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| 242 | int cmd_print_breakpoints(cmd_arg_t *argv) |
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| 243 | { |
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| 2719 | decky | 244 | unsigned int i; |
| 614 | palkovsky | 245 | char *symbol; |
| 2719 | decky | 246 | |
| 247 | printf("# Count Address INPROG ONESHOT FUNCCALL In symbol\n"); |
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| 248 | printf("-- ----- ---------- ------ ------- -------- ---------\n"); |
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| 249 | |||
| 250 | for (i = 0; i < BKPOINTS_MAX; i++) |
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| 614 | palkovsky | 251 | if (breakpoints[i].address) { |
| 252 | symbol = get_symtab_entry(breakpoints[i].address); |
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| 2719 | decky | 253 | |
| 254 | printf("%-2u %-5d %#10zx %-6s %-7s %-8s %s\n", i, |
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| 255 | breakpoints[i].counter, breakpoints[i].address, |
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| 256 | ((breakpoints[i].flags & BKPOINT_INPROG) ? "true" : "false"), |
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| 257 | ((breakpoints[i].flags & BKPOINT_ONESHOT) ? "true" : "false"), |
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| 258 | ((breakpoints[i].flags & BKPOINT_FUNCCALL) ? "true" : "false"), |
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| 259 | symbol); |
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| 614 | palkovsky | 260 | } |
| 261 | return 1; |
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| 262 | } |
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| 263 | |||
| 264 | /** Initialize debugger */ |
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| 265 | void debugger_init() |
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| 266 | { |
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| 267 | int i; |
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| 268 | |||
| 269 | for (i=0; i<BKPOINTS_MAX; i++) |
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| 270 | breakpoints[i].address = NULL; |
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| 271 | |||
| 673 | jermar | 272 | cmd_initialize(&bkpts_info); |
| 273 | if (!cmd_register(&bkpts_info)) |
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| 274 | panic("could not register command %s\n", bkpts_info.name); |
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| 614 | palkovsky | 275 | |
| 276 | cmd_initialize(&delbkpt_info); |
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| 277 | if (!cmd_register(&delbkpt_info)) |
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| 278 | panic("could not register command %s\n", delbkpt_info.name); |
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| 279 | |||
| 280 | cmd_initialize(&addbkpt_info); |
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| 281 | if (!cmd_register(&addbkpt_info)) |
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| 282 | panic("could not register command %s\n", addbkpt_info.name); |
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| 635 | palkovsky | 283 | |
| 284 | cmd_initialize(&addbkpte_info); |
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| 285 | if (!cmd_register(&addbkpte_info)) |
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| 286 | panic("could not register command %s\n", addbkpte_info.name); |
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| 614 | palkovsky | 287 | } |
| 288 | |||
| 289 | /** Handle breakpoint |
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| 290 | * |
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| 291 | * Find breakpoint in breakpoint table. |
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| 292 | * If found, call kconsole, set break on next instruction and reexecute. |
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| 293 | * If we are on "next instruction", set it back on the first and reexecute. |
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| 294 | * If breakpoint not found in breakpoint table, call kconsole and start |
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| 295 | * next instruction. |
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| 296 | */ |
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| 958 | jermar | 297 | void debugger_bpoint(istate_t *istate) |
| 614 | palkovsky | 298 | { |
| 299 | bpinfo_t *cur = NULL; |
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| 1780 | jermar | 300 | uintptr_t fireaddr = istate->epc; |
| 614 | palkovsky | 301 | int i; |
| 302 | |||
| 303 | /* test branch delay slot */ |
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| 304 | if (cp0_cause_read() & 0x80000000) |
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| 305 | panic("Breakpoint in branch delay slot not supported.\n"); |
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| 306 | |||
| 307 | spinlock_lock(&bkpoint_lock); |
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| 308 | for (i=0; i<BKPOINTS_MAX; i++) { |
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| 635 | palkovsky | 309 | /* Normal breakpoint */ |
| 310 | if (fireaddr == breakpoints[i].address \ |
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| 311 | && !(breakpoints[i].flags & BKPOINT_REINST)) { |
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| 614 | palkovsky | 312 | cur = &breakpoints[i]; |
| 635 | palkovsky | 313 | break; |
| 314 | } |
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| 315 | /* Reinst only breakpoint */ |
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| 316 | if ((breakpoints[i].flags & BKPOINT_REINST) \ |
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| 1780 | jermar | 317 | && (fireaddr ==breakpoints[i].address+sizeof(unative_t))) { |
| 635 | palkovsky | 318 | cur = &breakpoints[i]; |
| 319 | break; |
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| 320 | } |
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| 614 | palkovsky | 321 | } |
| 322 | if (cur) { |
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| 635 | palkovsky | 323 | if (cur->flags & BKPOINT_REINST) { |
| 614 | palkovsky | 324 | /* Set breakpoint on first instruction */ |
| 1780 | jermar | 325 | ((uint32_t *)cur->address)[0] = 0x0d; |
| 614 | palkovsky | 326 | /* Return back the second */ |
| 1780 | jermar | 327 | ((uint32_t *)cur->address)[1] = cur->nextinstruction; |
| 635 | palkovsky | 328 | cur->flags &= ~BKPOINT_REINST; |
| 614 | palkovsky | 329 | spinlock_unlock(&bkpoint_lock); |
| 330 | return; |
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| 635 | palkovsky | 331 | } |
| 332 | if (cur->flags & BKPOINT_INPROG) |
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| 333 | printf("Warning: breakpoint recursion\n"); |
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| 334 | |||
| 335 | if (!(cur->flags & BKPOINT_FUNCCALL)) |
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| 1196 | cejka | 336 | printf("***Breakpoint %d: %p in %s.\n", i, |
| 958 | jermar | 337 | fireaddr, get_symtab_entry(istate->epc)); |
| 635 | palkovsky | 338 | |
| 339 | /* Return first instruction back */ |
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| 1780 | jermar | 340 | ((uint32_t *)cur->address)[0] = cur->instruction; |
| 635 | palkovsky | 341 | |
| 342 | if (! (cur->flags & BKPOINT_ONESHOT)) { |
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| 343 | /* Set Breakpoint on next instruction */ |
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| 1780 | jermar | 344 | ((uint32_t *)cur->address)[1] = 0x0d; |
| 635 | palkovsky | 345 | cur->flags |= BKPOINT_REINST; |
| 346 | } |
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| 347 | cur->flags |= BKPOINT_INPROG; |
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| 614 | palkovsky | 348 | } else { |
| 1196 | cejka | 349 | printf("***Breakpoint %p in %s.\n", fireaddr, |
| 635 | palkovsky | 350 | get_symtab_entry(fireaddr)); |
| 614 | palkovsky | 351 | /* Move on to next instruction */ |
| 958 | jermar | 352 | istate->epc += 4; |
| 614 | palkovsky | 353 | } |
| 850 | palkovsky | 354 | if (cur) |
| 355 | cur->counter++; |
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| 635 | palkovsky | 356 | if (cur && (cur->flags & BKPOINT_FUNCCALL)) { |
| 357 | /* Allow zero bkfunc, just for counting */ |
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| 358 | if (cur->bkfunc) |
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| 958 | jermar | 359 | cur->bkfunc(cur, istate); |
| 635 | palkovsky | 360 | } else { |
| 361 | printf("***Type 'exit' to exit kconsole.\n"); |
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| 362 | /* This disables all other processors - we are not SMP, |
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| 363 | * actually this gets us to cpu_halt, if scheduler() is run |
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| 364 | * - we generally do not want scheduler to be run from debug, |
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| 365 | * so this is a good idea |
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| 366 | */ |
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| 367 | atomic_set(&haltstate,1); |
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| 368 | spinlock_unlock(&bkpoint_lock); |
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| 369 | |||
| 370 | kconsole("debug"); |
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| 371 | |||
| 372 | spinlock_lock(&bkpoint_lock); |
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| 373 | atomic_set(&haltstate,0); |
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| 374 | } |
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| 375 | if (cur && cur->address == fireaddr && (cur->flags & BKPOINT_INPROG)) { |
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| 376 | /* Remove one-shot breakpoint */ |
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| 377 | if ((cur->flags & BKPOINT_ONESHOT)) |
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| 378 | cur->address = NULL; |
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| 379 | /* Remove in-progress flag */ |
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| 380 | cur->flags &= ~BKPOINT_INPROG; |
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| 381 | } |
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| 614 | palkovsky | 382 | spinlock_unlock(&bkpoint_lock); |
| 383 | } |
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| 1702 | cejka | 384 | |
| 1888 | jermar | 385 | /** @} |
| 1702 | cejka | 386 | */ |