Mercurial > repos > blastem

annotate gdb_remote.c @ 530:92606a032d56

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Implement memory writes in GDB remote debugging stub
author Mike Pavone <pavone@retrodev.com>
date Wed, 12 Feb 2014 23:22:02 -0800
parents 6fe73296938a
children a3afee2271ce
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
467
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 456
diff changeset
1 /*
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 456
diff changeset
2 Copyright 2013 Michael Pavone
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
3 This file is part of BlastEm.
467
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 456
diff changeset
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.
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 456
diff changeset
5 */
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
6 #include "gdb_remote.h"
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
7 #include "68kinst.h"
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
8 #include "debug.h"
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
9 #include <unistd.h>
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
10 #include <fcntl.h>
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
11 #include <stddef.h>
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
12 #include <stdlib.h>
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
13 #include <stdio.h>
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
14 #include <string.h>
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
15
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
16 #define INITIAL_BUFFER_SIZE (16*1024)
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
17
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
18 #ifdef DO_DEBUG_PRINT
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
19 #define dfprintf fprintf
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
20 #else
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
21 #define dfprintf
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
22 #endif
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
23
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
24 char * buf = NULL;
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
25 char * curbuf = NULL;
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
26 char * end = NULL;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
27 size_t bufsize;
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
28 int cont = 0;
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
29 int expect_break_response=0;
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
30 uint32_t resume_pc;
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
31
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
32
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
33 static uint16_t branch_t;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
34 static uint16_t branch_f;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
35
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
36 static bp_def * breakpoints = NULL;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
37 static uint32_t bp_index = 0;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
38
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
39
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
40 void hex_32(uint32_t num, char * out)
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
41 {
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
42 for (int32_t shift = 28; shift >= 0; shift -= 4)
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
43 {
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
44 uint8_t nibble = num >> shift & 0xF;
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
45 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '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
46 }
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
47 }
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
48
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
49 void hex_16(uint16_t num, char * out)
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
50 {
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
51 for (int16_t shift = 14; shift >= 0; shift -= 4)
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
52 {
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
53 uint8_t nibble = num >> shift & 0xF;
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
54 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '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
55 }
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
56 }
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
57
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
58 void hex_8(uint8_t num, char * out)
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
59 {
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
60 uint8_t nibble = num >> 4;
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
61 *(out++) = nibble > 9 ? nibble - 0xA + 'A' : nibble + '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
62 nibble = num & 0xF;
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
63 *out = nibble > 9 ? nibble - 0xA + 'A' : nibble + '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
64 }
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
65
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
66 void gdb_calc_checksum(char * command, char *out)
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
67 {
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
68 uint8_t checksum = 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
69 while (*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
70 {
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
71 checksum += *(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
72 }
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
73 hex_8(checksum, out);
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
74 }
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
75
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
76 void write_or_die(int fd, const void *buf, size_t count)
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
77 {
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
78 if (write(fd, buf, count) < count) {
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
79 fputs("Error writing to stdout\n", stderr);
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
80 exit(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
81 }
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
82 }
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
83
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
84 void gdb_send_command(char * 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
85 {
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
86 char end[3];
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
87 write_or_die(STDOUT_FILENO, "$", 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
88 write_or_die(STDOUT_FILENO, command, strlen(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
89 end[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
90 gdb_calc_checksum(command, end+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
91 write_or_die(STDOUT_FILENO, end, 3);
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
92 dfprintf(stderr, "Sent $%s#%c%c\n", command, end[1], end[2]);
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
93 }
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
94
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
95 uint32_t calc_status(m68k_context * context)
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
96 {
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
97 uint32_t status = context->status << 3;
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
98 for (int i = 0; i < 5; i++)
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
99 {
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
100 status <<= 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
101 status |= context->flags[i];
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
102 }
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
103 return status;
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
104 }
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
105
526
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
106 void update_status(m68k_context * context, uint16_t value)
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
107 {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
108 context->status = value >> 8;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
109 for (int i = 4; i >= 0; i--)
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
110 {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
111 context->flags[i] = value & 1;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
112 value >>= 1;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
113 }
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
114 }
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
115
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
116 uint8_t read_byte(m68k_context * context, uint32_t 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
117 {
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
118 uint16_t * 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
119 //TODO: Use generated read/write functions so that memory map is properly respected
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
120 if (address < 0x400000) {
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
121 word = context->mem_pointers[0] + address/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
122 } else if (address >= 0xE00000) {
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
123 word = context->mem_pointers[1] + (address & 0xFFFF)/2;
530
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
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;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
148 z80_handle_code_write(address & 0x1FFF, gen->z80);
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
149 return;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
150 } else {
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 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
153 if (address & 1) {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
154 *word = (*word & 0xFF00) | value;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
155 } else {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
156 *word = (*word & 0xFF) | value << 8;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
157 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
158 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
159
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
160 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
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 char send_buf[512];
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
163 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
164 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
165 {
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
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 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
168 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
169 //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
170 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
171 }
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 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
173 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
174 break;
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
175 case 's': {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
176 if (*(command+1) != 0) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
177 //TODO: implement resuming at an arbitrary address
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
178 goto not_impl;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
179 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
180 m68kinst inst;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
181 uint16_t * pc_ptr;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
182 if (pc < 0x400000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
183 pc_ptr = cart + pc/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
184 } else if(pc > 0xE00000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
185 pc_ptr = ram + (pc & 0xFFFF)/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
186 } else {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
187 fprintf(stderr, "Entered gdb remote debugger stub at address %X\n", pc);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
188 exit(1);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
189 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
190 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
191 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
192
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
193 if (inst.op == M68K_RTS) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
194 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
195 } 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
196 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
197 } else if(m68k_is_branch(&inst)) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
198 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
199 branch_f = after;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
200 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
201 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
202 } 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
203 branch_t = after;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
204 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
205 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
206 } else {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
207 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
208 }
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 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
211
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
212 cont = 1;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
213 expect_break_response = 1;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
214 break;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
215 }
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
216 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
217 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
218 //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
219 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
220 } 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
221 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
222 }
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 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
224 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
225 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
226 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
227 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
228 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
229 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
230 new_bp->next = breakpoints;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
231 new_bp->address = address;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
232 new_bp->index = bp_index++;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
233 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
234 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
235 } 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
236 //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
237 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
238 }
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 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
240 }
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 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
242 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
243 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
244 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
245 remove_breakpoint(context, address);
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
246 bp_def **found = find_breakpoint(&breakpoints, address);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
247 if (*found)
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
248 {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
249 bp_def * to_remove = *found;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
250 *found = to_remove->next;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
251 free(to_remove);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
252 }
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
253 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
254 } 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
255 //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
256 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
257 }
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
258 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
259 }
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
260 case 'g': {
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
261 char * cur = 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
262 for (int i = 0; i < 8; i++)
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
263 {
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
264 hex_32(context->dregs[i], cur);
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 cur += 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
266 }
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
267 for (int i = 0; i < 8; i++)
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
268 {
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
269 hex_32(context->aregs[i], cur);
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
270 cur += 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
271 }
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
272 hex_32(calc_status(context), cur);
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
273 cur += 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
274 hex_32(pc, cur);
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
275 cur += 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
276 *cur = 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
277 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
278 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
279 }
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
280 case 'm': {
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
281 char * rest;
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
282 uint32_t address = strtoul(command+1, &rest, 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
283 uint32_t size = strtoul(rest+1, 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
284 if (size > sizeof(send_buf-1)/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
285 size = sizeof(send_buf-1)/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
286 }
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
287 char *cur = 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
288 while (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
289 {
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
290 hex_8(read_byte(context, address), cur);
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
291 cur += 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
292 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
293 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
294 }
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
295 *cur = 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
296 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
297 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
298 }
530
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
299 case 'M': {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
300 char * rest;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
301 uint32_t address = strtoul(command+1, &rest, 16);
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
302 uint32_t size = strtoul(rest+1, &rest, 16);
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
303
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
304 char *cur = rest+1;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
305 while (size)
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
306 {
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
307 char tmp[3];
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
308 tmp[0] = *(cur++);
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
309 tmp[1] = *(cur++);
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
310 tmp[2] = 0;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
311 write_byte(context, address, strtoul(tmp, NULL, 16));
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
312 address++;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
313 size--;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
314 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
315 gdb_send_command("OK");
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
316 break;
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
317 }
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
318 case 'X':
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
319 //binary transfers aren't supported currently as I don't feel like dealing with the escaping
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
320 gdb_send_command("");
92606a032d56 Implement memory writes in GDB remote debugging stub
Mike Pavone <pavone@retrodev.com>
parents: 526
diff changeset
321 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
322 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
323 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.
Mike Pavone <pavone@retrodev.com>
parents: 505
diff changeset
324
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
325 if (reg < 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
326 hex_32(context->dregs[reg], 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
327 } 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
328 hex_32(context->aregs[reg-8], 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
329 } 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
330 hex_32(calc_status(context), 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
331 } 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
332 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
333 } 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
334 send_buf[0] = 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
335 }
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
336 send_buf[8] = 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
337 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
338 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
339 }
526
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
340 case 'P': {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
341 char *after = NULL;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
342 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
343 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
344
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
345 if (reg < 8) {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
346 context->dregs[reg] = value;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
347 } else if (reg < 16) {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
348 context->aregs[reg-8] = value;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
349 } else if (reg == 16) {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
350 update_status(context, value);
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
351 } else {
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
352 //supporting updates to PC is going to be a pain
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
353 gdb_send_command("E01");
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
354 break;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
355 }
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
356 gdb_send_command("OK");
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
357 break;
6fe73296938a Support setting registers in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 525
diff changeset
358 }
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
359 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
360 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
361 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
362 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
363 } 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
364 //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
365 //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
366 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
367 } 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
368 //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
369 gdb_send_command("Text=0;Data=0;Bss=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 } 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
371 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
372 } 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
373 //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
374 gdb_send_command("T0;tnotrun: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
375 } 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
376 //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
377 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
378 } 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
379 //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
380 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
381 } 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
382 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
383 }
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 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
385 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
386 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
387 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
388 } 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
389 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
390 {
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 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
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 //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
394 //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
395 //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
396 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
397 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
398 break;
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
399 case 's':
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 m68kinst inst;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
402 uint16_t * pc_ptr;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
403 if (pc < 0x400000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
404 pc_ptr = cart + pc/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
405 } else if(pc > 0xE00000) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
406 pc_ptr = ram + (pc & 0xFFFF)/2;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
407 } else {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
408 fprintf(stderr, "Entered gdb remote debugger stub at address %X\n", pc);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
409 exit(1);
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:
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
453 fprintf(stderr, "Command %s is not implemented, exiting...\n", 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
454 exit(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
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
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 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
458 {
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
459 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
460 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
461 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
462 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
463 }
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
464 if ((pc & 0xFFFFFF) == branch_t) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
465 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
466 if (!*f_bp) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
467 remove_breakpoint(context, branch_f);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
468 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
469 branch_t = branch_f = 0;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
470 } else if((pc & 0xFFFFFF) == branch_f) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
471 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
472 if (!*t_bp) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
473 remove_breakpoint(context, branch_t);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
474 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
475 branch_t = branch_f = 0;
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
476 }
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
477 //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
478 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
479 if (!*this_bp) {
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
480 remove_breakpoint(context, pc & 0xFFFFFF);
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
481 }
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
482 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
483 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
484 uint8_t partial = 0;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
485 while(!cont)
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
486 {
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
487 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
488 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
489 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
490 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
491 } 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
492 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
493 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
494 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
495 }
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 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
497 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
498 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
499 }
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 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
501 {
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 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
503 {
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 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 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
506 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
507 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
508 }
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 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
510 //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
511 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
512 //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
513 //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
514 *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
515 //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
516 if (write(STDOUT_FILENO, "+", 1) < 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
517 fputs("Error writing to stdout\n", stderr);
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 exit(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
519 }
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
520 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
521 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
522 }
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 } 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
524 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
525 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
526 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
527 }
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
528 } else {
525
62860044337d Support single stepping in gdb remote debugger
Mike Pavone <pavone@retrodev.com>
parents: 515
diff changeset
529 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
530 }
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
531 }
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
532 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
533 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
534 }
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
535 }
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
536 return context;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
537 }
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 void gdb_remote_init(void)
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
540 {
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
541 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
542 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
543 bufsize = INITIAL_BUFFER_SIZE;
456
249d24973682 Initial work on GDB remote debugging support
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
544 }