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annotate gdb_remote.c @ 792:724bbec47f86

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Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
author Michael Pavone <pavone@retrodev.com>
date Sat, 25 Jul 2015 18:22:07 -0700
parents 483f7e7926a6
children 092524bb2e8f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #include "gdb_remote.h"
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7 #include "68kinst.h"
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8 #include "debug.h"
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9 #include "util.h"
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10 #include <unistd.h>
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11 #include <fcntl.h>
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12 #include <stddef.h>
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13 #include <stdlib.h>
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14 #include <stdio.h>
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15 #include <string.h>
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16
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17 #define INITIAL_BUFFER_SIZE (16*1024)
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18
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19 #ifdef DO_DEBUG_PRINT
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20 #define dfprintf fprintf
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21 #else
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22 #define dfprintf
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23 #endif
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24
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25 char * buf = NULL;
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26 char * curbuf = NULL;
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27 char * end = NULL;
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28 size_t bufsize;
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29 int cont = 0;
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30 int expect_break_response=0;
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31 uint32_t resume_pc;
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32
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33
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34 static uint16_t branch_t;
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35 static uint16_t branch_f;
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36
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37 static bp_def * breakpoints = NULL;
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38 static uint32_t bp_index = 0;
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39
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40
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41 void hex_32(uint32_t num, char * out)
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42 {
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43 for (int32_t shift = 28; shift >= 0; shift -= 4)
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44 {
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45 uint8_t nibble = num >> shift & 0xF;
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46 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0';
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47 }
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48 }
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49
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50 void hex_16(uint16_t num, char * out)
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51 {
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52 for (int16_t shift = 14; shift >= 0; shift -= 4)
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53 {
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54 uint8_t nibble = num >> shift & 0xF;
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55 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0';
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56 }
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57 }
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58
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59 void hex_8(uint8_t num, char * out)
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60 {
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61 uint8_t nibble = num >> 4;
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62 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0';
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63 nibble = num & 0xF;
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64 *out = nibble > 9 ? nibble - 0xA + 'A' : nibble + '0';
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65 }
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66
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67 void gdb_calc_checksum(char * command, char *out)
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68 {
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69 uint8_t checksum = 0;
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70 while (*command)
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71 {
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72 checksum += *(command++);
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73 }
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74 hex_8(checksum, out);
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75 }
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76
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77 void write_or_die(int fd, const void *buf, size_t count)
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78 {
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79 if (write(fd, buf, count) < count) {
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80 fatal_error("Error writing to stdout\n");
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81 }
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82 }
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83
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84 void gdb_send_command(char * command)
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85 {
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86 char end[3];
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87 write_or_die(STDOUT_FILENO, "$", 1);
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88 write_or_die(STDOUT_FILENO, command, strlen(command));
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89 end[0] = '#';
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90 gdb_calc_checksum(command, end+1);
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91 write_or_die(STDOUT_FILENO, end, 3);
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92 dfprintf(stderr, "Sent $%s#%c%c\n", command, end[1], end[2]);
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93 }
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94
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95 uint32_t calc_status(m68k_context * context)
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96 {
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97 uint32_t status = context->status << 3;
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98 for (int i = 0; i < 5; i++)
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99 {
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100 status <<= 1;
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101 status |= context->flags[i];
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102 }
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103 return status;
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104 }
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105
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106 void update_status(m68k_context * context, uint16_t value)
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107 {
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108 context->status = value >> 8;
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109 for (int i = 4; i >= 0; i--)
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110 {
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111 context->flags[i] = value & 1;
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112 value >>= 1;
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113 }
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114 }
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115
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116 uint8_t read_byte(m68k_context * context, uint32_t address)
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117 {
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118 uint16_t * word;
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119 //TODO: Use generated read/write functions so that memory map is properly respected
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120 if (address < 0x400000) {
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121 word = context->mem_pointers[0] + address/2;
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122 } else if (address >= 0xE00000) {
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123 word = context->mem_pointers[1] + (address & 0xFFFF)/2;
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124 } else if (address >= 0xA00000 && address < 0xA04000) {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
125 return z80_ram[address & 0x1FFF];
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
126 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
127 return 0;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
128 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
129 if (address & 1) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
130 return *word;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
131 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
132 return *word >> 8;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
133 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
134
530
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
135 void write_byte(m68k_context * context, uint32_t address, uint8_t value)
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
136 {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
137 uint16_t * word;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
138 //TODO: Use generated read/write functions so that memory map is properly respected
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
139 if (address < 0x400000) {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
140 //TODO: Invalidate translated code
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
141 word = context->mem_pointers[0] + address/2;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
142 } else if (address >= 0xE00000) {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
143 m68k_handle_code_write(address & 0xFFFF, context);
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
144 word = context->mem_pointers[1] + (address & 0xFFFF)/2;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
145 } else if (address >= 0xA00000 && address < 0xA04000) {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
146 z80_ram[address & 0x1FFF] = value;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
147 genesis_context * gen = context->system;
565
9324f721efa6 Add a separate flag/define for disabling the Z80 at compile time to ease refactoring
Michael Pavone <pavone@retrodev.com>
parents: 548
diff changeset
148 #ifndef NO_Z80
530
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
149 z80_handle_code_write(address & 0x1FFF, gen->z80);
548
a3afee2271ce Initial work on the x86-32 target
Michael Pavone <pavone@retrodev.com>
parents: 530
diff changeset
150 #endif
530
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
151 return;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
152 } else {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
153 return;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
154 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
155 if (address & 1) {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
156 *word = (*word & 0xFF00) | value;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
157 } else {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
158 *word = (*word & 0xFF) | value << 8;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
159 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
160 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
161
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
162 void gdb_run_command(m68k_context * context, uint32_t pc, char * command)
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
163 {
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
164 char send_buf[512];
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
165 dfprintf(stderr, "Received command %s\n", command);
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
166 switch(*command)
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
167 {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
168
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
169 case 'c':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
170 if (*(command+1) != 0) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
171 //TODO: implement resuming at an arbitrary address
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
172 goto not_impl;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
173 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
174 cont = 1;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
175 expect_break_response = 1;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
176 break;
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
177 case 's': {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
178 if (*(command+1) != 0) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
179 //TODO: implement resuming at an arbitrary address
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
180 goto not_impl;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
181 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
182 m68kinst inst;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
183 uint16_t * pc_ptr;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
184 if (pc < 0x400000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
185 pc_ptr = cart + pc/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
186 } else if(pc > 0xE00000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
187 pc_ptr = ram + (pc & 0xFFFF)/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
188 } else {
792
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 757
diff changeset
189 fatal_error("Entered gdb remote debugger stub at address %X\n", pc);
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
190 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
191 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
192 uint32_t after = pc + (after_pc-pc_ptr)*2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
193
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
194 if (inst.op == M68K_RTS) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
195 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
196 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
197 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
198 } else if(m68k_is_branch(&inst)) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
199 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
200 branch_f = after;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
201 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
202 insert_breakpoint(context, branch_t, (uint8_t *)gdb_debug_enter);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
203 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
204 branch_t = after;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
205 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
206 insert_breakpoint(context, branch_f, (uint8_t *)gdb_debug_enter);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
207 } else {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
208 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
209 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
210 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
211 insert_breakpoint(context, after, (uint8_t *)gdb_debug_enter);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
212
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
213 cont = 1;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
214 expect_break_response = 1;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
215 break;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
216 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
217 case 'H':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
218 if (command[1] == 'g' || command[1] == 'c') {;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
219 //no thread suport, just acknowledge
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
220 gdb_send_command("OK");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
221 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
222 goto not_impl;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
223 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
224 break;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
225 case 'Z': {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
226 uint8_t type = command[1];
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
227 if (type < '2') {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
228 uint32_t address = strtoul(command+3, NULL, 16);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
229 insert_breakpoint(context, address, (uint8_t *)gdb_debug_enter);
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
230 bp_def *new_bp = malloc(sizeof(bp_def));
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
231 new_bp->next = breakpoints;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
232 new_bp->address = address;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
233 new_bp->index = bp_index++;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
234 breakpoints = new_bp;
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
235 gdb_send_command("OK");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
236 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
237 //watchpoints are not currently supported
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
238 gdb_send_command("");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
239 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
240 break;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
241 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
242 case 'z': {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
243 uint8_t type = command[1];
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
244 if (type < '2') {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
245 uint32_t address = strtoul(command+3, NULL, 16);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
246 remove_breakpoint(context, address);
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
247 bp_def **found = find_breakpoint(&breakpoints, address);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
248 if (*found)
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
249 {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
250 bp_def * to_remove = *found;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
251 *found = to_remove->next;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
252 free(to_remove);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
253 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
254 gdb_send_command("OK");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
255 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
256 //watchpoints are not currently supported
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parents: 505
diff changeset
257 gdb_send_command("");
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parents: 505
diff changeset
258 }
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Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
259 break;
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Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
260 }
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Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
261 case 'g': {
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parents: 505
diff changeset
262 char * cur = send_buf;
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parents: 505
diff changeset
263 for (int i = 0; i < 8; i++)
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parents: 505
diff changeset
264 {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
265 hex_32(context->dregs[i], cur);
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parents: 505
diff changeset
266 cur += 8;
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parents: 505
diff changeset
267 }
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parents: 505
diff changeset
268 for (int i = 0; i < 8; i++)
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parents: 505
diff changeset
269 {
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parents: 505
diff changeset
270 hex_32(context->aregs[i], cur);
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diff changeset
271 cur += 8;
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parents: 505
diff changeset
272 }
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parents: 505
diff changeset
273 hex_32(calc_status(context), cur);
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parents: 505
diff changeset
274 cur += 8;
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parents: 505
diff changeset
275 hex_32(pc, cur);
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diff changeset
276 cur += 8;
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diff changeset
277 *cur = 0;
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diff changeset
278 gdb_send_command(send_buf);
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diff changeset
279 break;
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diff changeset
280 }
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diff changeset
281 case 'm': {
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diff changeset
282 char * rest;
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diff changeset
283 uint32_t address = strtoul(command+1, &rest, 16);
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diff changeset
284 uint32_t size = strtoul(rest+1, NULL, 16);
757
483f7e7926a6 More clang warning cleanup
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diff changeset
285 if (size > (sizeof(send_buf)-1)/2) {
483f7e7926a6 More clang warning cleanup
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diff changeset
286 size = (sizeof(send_buf)-1)/2;
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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diff changeset
287 }
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diff changeset
288 char *cur = send_buf;
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diff changeset
289 while (size)
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diff changeset
290 {
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parents: 505
diff changeset
291 hex_8(read_byte(context, address), cur);
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diff changeset
292 cur += 2;
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diff changeset
293 address++;
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diff changeset
294 size--;
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diff changeset
295 }
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parents: 505
diff changeset
296 *cur = 0;
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diff changeset
297 gdb_send_command(send_buf);
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diff changeset
298 break;
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diff changeset
299 }
530
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
300 case 'M': {
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
301 char * rest;
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
302 uint32_t address = strtoul(command+1, &rest, 16);
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parents: 526
diff changeset
303 uint32_t size = strtoul(rest+1, &rest, 16);
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
304
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
305 char *cur = rest+1;
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parents: 526
diff changeset
306 while (size)
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
307 {
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parents: 526
diff changeset
308 char tmp[3];
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
309 tmp[0] = *(cur++);
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
310 tmp[1] = *(cur++);
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
311 tmp[2] = 0;
92606a032d56 Implement memory writes in GDB remote debugging stub
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diff changeset
312 write_byte(context, address, strtoul(tmp, NULL, 16));
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diff changeset
313 address++;
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diff changeset
314 size--;
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diff changeset
315 }
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diff changeset
316 gdb_send_command("OK");
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diff changeset
317 break;
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diff changeset
318 }
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diff changeset
319 case 'X':
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diff changeset
320 //binary transfers aren't supported currently as I don't feel like dealing with the escaping
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diff changeset
321 gdb_send_command("");
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diff changeset
322 break;
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
323 case 'p': {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
324 unsigned long reg = strtoul(command+1, NULL, 16);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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diff changeset
325
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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diff changeset
326 if (reg < 8) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents: 505
diff changeset
327 hex_32(context->dregs[reg], send_buf);
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parents: 505
diff changeset
328 } else if (reg < 16) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents: 505
diff changeset
329 hex_32(context->aregs[reg-8], send_buf);
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parents: 505
diff changeset
330 } else if (reg == 16) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
331 hex_32(calc_status(context), send_buf);
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Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
332 } else if (reg == 17) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
333 hex_32(pc, send_buf);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
334 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
335 send_buf[0] = 0;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents: 505
diff changeset
336 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
337 send_buf[8] = 0;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents: 505
diff changeset
338 gdb_send_command(send_buf);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
339 break;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
340 }
526
6fe73296938a Support setting registers in gdb remote debugger
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diff changeset
341 case 'P': {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
342 char *after = NULL;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
343 unsigned long reg = strtoul(command+1, &after, 16);
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
344 uint32_t value = strtoul(after+1, NULL, 16);
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
345
6fe73296938a Support setting registers in gdb remote debugger
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diff changeset
346 if (reg < 8) {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
347 context->dregs[reg] = value;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
348 } else if (reg < 16) {
6fe73296938a Support setting registers in gdb remote debugger
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parents: 525
diff changeset
349 context->aregs[reg-8] = value;
6fe73296938a Support setting registers in gdb remote debugger
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parents: 525
diff changeset
350 } else if (reg == 16) {
6fe73296938a Support setting registers in gdb remote debugger
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parents: 525
diff changeset
351 update_status(context, value);
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
352 } else {
6fe73296938a Support setting registers in gdb remote debugger
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parents: 525
diff changeset
353 //supporting updates to PC is going to be a pain
6fe73296938a Support setting registers in gdb remote debugger
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parents: 525
diff changeset
354 gdb_send_command("E01");
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
355 break;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
356 }
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
357 gdb_send_command("OK");
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
358 break;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
359 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
360 case 'q':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
361 if (!memcmp("Supported", command+1, strlen("Supported"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
362 sprintf(send_buf, "PacketSize=%X", (int)bufsize);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
363 gdb_send_command(send_buf);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
364 } else if (!memcmp("Attached", command+1, strlen("Supported"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
365 //not really meaningful for us, but saying we spawned a new process
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
366 //is probably closest to the truth
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
367 gdb_send_command("0");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
368 } else if (!memcmp("Offsets", command+1, strlen("Offsets"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
369 //no relocations, so offsets are all 0
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
370 gdb_send_command("Text=0;Data=0;Bss=0");
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Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
371 } else if (!memcmp("Symbol", command+1, strlen("Symbol"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
372 gdb_send_command("");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
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parents: 505
diff changeset
373 } else if (!memcmp("TStatus", command+1, strlen("TStatus"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
374 //TODO: actual tracepoint support
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
375 gdb_send_command("T0;tnotrun:0");
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parents: 505
diff changeset
376 } else if (!memcmp("TfV", command+1, strlen("TfV")) || !memcmp("TfP", command+1, strlen("TfP"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
377 //TODO: actual tracepoint support
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
378 gdb_send_command("");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
379 } else if (command[1] == 'C') {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
380 //we only support a single thread currently, so send 1
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
381 gdb_send_command("1");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
382 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
383 goto not_impl;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
384 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
385 break;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
386 case 'v':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
387 if (!memcmp("Cont?", command+1, strlen("Cont?"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
388 gdb_send_command("vCont;c;C;s;S");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
389 } else if (!memcmp("Cont;", command+1, strlen("Cont;"))) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
390 switch (*(command + 1 + strlen("Cont;")))
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
391 {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
392 case 'c':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
393 case 'C':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
394 //might be interesting to have continue with signal fire a
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
395 //trap exception or something, but for no we'll treat it as
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
396 //a normal continue
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
397 cont = 1;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
398 expect_break_response = 1;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
399 break;
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
400 case 's':
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
401 case 'S': {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
402 m68kinst inst;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
403 uint16_t * pc_ptr;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
404 if (pc < 0x400000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
405 pc_ptr = cart + pc/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
406 } else if(pc > 0xE00000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
407 pc_ptr = ram + (pc & 0xFFFF)/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
408 } else {
792
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 757
diff changeset
409 fatal_error("Entered gdb remote debugger stub at address %X\n", pc);
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
410 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
411 uint16_t * after_pc = m68k_decode(pc_ptr, &inst, pc & 0xFFFFFF);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
412 uint32_t after = pc + (after_pc-pc_ptr)*2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
413
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
414 if (inst.op == M68K_RTS) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
415 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
416 } else if (inst.op == M68K_RTE || inst.op == M68K_RTR) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
417 after = (read_dma_value((context->aregs[7]+2)/2) << 16) | read_dma_value((context->aregs[7]+2)/2 + 1);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
418 } else if(m68k_is_branch(&inst)) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
419 if (inst.op == M68K_BCC && inst.extra.cond != COND_TRUE) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
420 branch_f = after;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
421 branch_t = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
422 insert_breakpoint(context, branch_t, (uint8_t *)gdb_debug_enter);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
423 } else if(inst.op == M68K_DBCC && inst.extra.cond != COND_FALSE) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
424 branch_t = after;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
425 branch_f = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
426 insert_breakpoint(context, branch_f, (uint8_t *)gdb_debug_enter);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
427 } else {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
428 after = m68k_branch_target(&inst, context->dregs, context->aregs) & 0xFFFFFF;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
429 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
430 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
431 insert_breakpoint(context, after, (uint8_t *)gdb_debug_enter);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
432
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
433 cont = 1;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
434 expect_break_response = 1;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
435 break;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
436 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
437 default:
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
438 goto not_impl;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
439 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
440 } else {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
441 goto not_impl;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
442 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
443 break;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
444 case '?':
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
445 gdb_send_command("S05");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
446 break;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
447 default:
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
448 goto not_impl;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
449
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
450 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
451 return;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
452 not_impl:
792
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 757
diff changeset
453 fatal_error("Command %s is not implemented, exiting...\n", command);
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
454 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
455
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
456 m68k_context * gdb_debug_enter(m68k_context * context, uint32_t pc)
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
457 {
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
458 dfprintf(stderr, "Entered debugger at address %X\n", pc);
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
459 if (expect_break_response) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
460 gdb_send_command("S05");
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
461 expect_break_response = 0;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
462 }
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
463 if ((pc & 0xFFFFFF) == branch_t) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
464 bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
465 if (!*f_bp) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
466 remove_breakpoint(context, branch_f);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
467 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
468 branch_t = branch_f = 0;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
469 } else if((pc & 0xFFFFFF) == branch_f) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
470 bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
471 if (!*t_bp) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
472 remove_breakpoint(context, branch_t);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
473 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
474 branch_t = branch_f = 0;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
475 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
476 //Check if this is a user set breakpoint, or just a temporary one
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
477 bp_def ** this_bp = find_breakpoint(&breakpoints, pc & 0xFFFFFF);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
478 if (!*this_bp) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
479 remove_breakpoint(context, pc & 0xFFFFFF);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
480 }
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
481 resume_pc = pc;
505
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
482 cont = 0;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
483 uint8_t partial = 0;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
484 while(!cont)
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
485 {
505
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
486 if (!curbuf) {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
487 int numread = read(STDIN_FILENO, buf, bufsize);
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
488 curbuf = buf;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
489 end = buf + numread;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
490 } else if (partial) {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
491 if (curbuf != buf) {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
492 memmove(curbuf, buf, end-curbuf);
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
493 end -= curbuf - buf;
505
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
494 }
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
495 int numread = read(STDIN_FILENO, end, bufsize - (end-buf));
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
496 end += numread;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
497 curbuf = buf;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
498 }
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
499 for (; curbuf < end; curbuf++)
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
500 {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
501 if (*curbuf == '$')
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
502 {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
503 curbuf++;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
504 char * start = curbuf;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
505 while (curbuf < end && *curbuf != '#') {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
506 curbuf++;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
507 }
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
508 if (*curbuf == '#') {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
509 //check to make sure we've received the checksum bytes
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
510 if (end-curbuf >= 2) {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
511 //TODO: verify checksum
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
512 //Null terminate payload
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
513 *curbuf = 0;
505
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
514 //send acknowledgement
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
515 if (write(STDOUT_FILENO, "+", 1) < 1) {
792
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 757
diff changeset
516 fatal_error("Error writing to stdout\n");
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
517 }
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
518 gdb_run_command(context, pc, start);
505
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
519 curbuf += 2;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
520 }
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
521 } else {
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
522 curbuf--;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
523 partial = 1;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
524 break;
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
525 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
526 } else {
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
527 dfprintf(stderr, "Ignoring character %c\n", *curbuf);
505
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
528 }
b7b7a1cab44a The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
Michael Pavone <pavone@retrodev.com>
parents: 467
diff changeset
529 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
530 if (curbuf == end) {
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
531 curbuf = NULL;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
532 }
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
533 }
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
534 return context;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
535 }
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
536
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
537 void gdb_remote_init(void)
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
538 {
515
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
539 buf = malloc(INITIAL_BUFFER_SIZE);
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
540 curbuf = NULL;
1495179d6737 Initial GDB remote debugging support. Lacks some features, but breakpoints and basic inspection of registers and memory work.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
541 bufsize = INITIAL_BUFFER_SIZE;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
542 }