annotate dis.c @ 522:6a14c5a95648

Adjust PSG and YM-2612 volume to be closer to the real console
author Michael Pavone <pavone@retrodev.com>
date Tue, 11 Feb 2014 12:52:28 -0800
parents 140af5509ce7
children 316facea756d de6f00204fa2
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: 197
diff changeset
1 /*
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 197
diff changeset
2 Copyright 2013 Michael Pavone
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 197
diff changeset
3 This file is part of BlastEm.
140af5509ce7 Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents: 197
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: 197
diff changeset
5 */
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
6 #include "68kinst.h"
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
7 #include <stdio.h>
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
8 #include <stdlib.h>
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
9
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
10 uint8_t visited[(16*1024*1024)/16];
139
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
11 uint8_t label[(16*1024*1024)/8];
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
12
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
13 void visit(uint32_t address)
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
14 {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
15 address &= 0xFFFFFF;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
16 visited[address/16] |= 1 << ((address / 2) % 8);
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
17 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
18
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
19 void reference(uint32_t address)
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
20 {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
21 address &= 0xFFFFFF;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
22 //printf("referenced: %X\n", address);
139
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
23 label[address/16] |= 1 << (address % 8);
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
24 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
25
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
26 uint8_t is_visited(uint32_t address)
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
27 {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
28 address &= 0xFFFFFF;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
29 return visited[address/16] & (1 << ((address / 2) % 8));
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
30 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
31
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
32 uint8_t is_label(uint32_t address)
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
33 {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
34 address &= 0xFFFFFF;
139
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
35 return label[address/16] & (1 << (address % 8));
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
36 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
37
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
38 typedef struct deferred {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
39 uint32_t address;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
40 struct deferred *next;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
41 } deferred;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
42
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
43 deferred * defer(uint32_t address, deferred * next)
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
44 {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
45 if (is_visited(address)) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
46 return next;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
47 }
111
8b50d2c975b2 Fix decoding of Scc
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
48 //printf("deferring %X\n", address);
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
49 deferred * d = malloc(sizeof(deferred));
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
50 d->address = address;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
51 d->next = next;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
52 return d;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
53 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
54
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
55 void check_reference(m68kinst * inst, m68k_op_info * op)
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
56 {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
57 switch(op->addr_mode)
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
58 {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
59 case MODE_PC_DISPLACE:
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
60 reference(inst->address + 2 + op->params.regs.displacement);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
61 break;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
62 case MODE_ABSOLUTE:
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
63 case MODE_ABSOLUTE_SHORT:
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
64 reference(op->params.immed);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
65 break;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
66 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
67 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
68
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
69 uint8_t labels = 0;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
70 uint8_t addr = 0;
151
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
71 uint8_t only = 0;
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
72
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
73 int main(int argc, char ** argv)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
74 {
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
75 long filesize;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
76 unsigned short *filebuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
77 char disbuf[1024];
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
78 m68kinst instbuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
79 unsigned short * cur;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
80 FILE * f = fopen(argv[1], "rb");
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
81 fseek(f, 0, SEEK_END);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
82 filesize = ftell(f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
83 fseek(f, 0, SEEK_SET);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
84 filebuf = malloc(filesize);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
85 fread(filebuf, 2, filesize/2, f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
86 fclose(f);
151
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
87 deferred *def = NULL, *tmpd;
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
88 for(uint8_t opt = 2; opt < argc; ++opt) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
89 if (argv[opt][0] == '-') {
197
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
90 FILE * address_log;
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
91 switch (argv[opt][1])
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
92 {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
93 case 'l':
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
94 labels = 1;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
95 break;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
96 case 'a':
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
97 addr = 1;
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
98 break;
151
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
99 case 'o':
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
100 only = 1;
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
101 break;
197
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
102 case 'f':
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
103 opt++;
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
104 if (opt >= argc) {
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
105 fputs("-f must be followed by a filename\n", stderr);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
106 exit(1);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
107 }
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
108 address_log = fopen(argv[opt], "r");
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
109 if (!address_log) {
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
110 fprintf(stderr, "Failed to open %s for reading\n", argv[opt]);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
111 exit(1);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
112 }
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
113 while (fgets(disbuf, sizeof(disbuf), address_log)) {
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
114 if (disbuf[0]) {
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
115 uint32_t address = strtol(disbuf, NULL, 16);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
116 if (address) {
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
117 def = defer(address, def);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
118 reference(address);
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
119 }
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
120 }
7c227a8ec53d Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents: 164
diff changeset
121 }
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
122 }
151
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
123 } else {
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
124 uint32_t address = strtol(argv[opt], NULL, 16);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
125 def = defer(address, def);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
126 reference(address);
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
127 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
128 }
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
129 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
130 {
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
131 *cur = (*cur >> 8) | (*cur << 8);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
132 }
139
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
133 uint32_t start = filebuf[2] << 16 | filebuf[3], tmp_addr;
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
134 uint32_t int_2 = filebuf[0x68/2] << 16 | filebuf[0x6A/2];
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
135 uint32_t int_4 = filebuf[0x70/2] << 16 | filebuf[0x72/2];
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
136 uint32_t int_6 = filebuf[0x78/2] << 16 | filebuf[0x7A/2];
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
137 uint16_t *encoded, *next;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
138 uint32_t size;
151
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
139 if (!def || !only) {
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
140 def = defer(start, def);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
141 def = defer(int_2, def);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
142 def = defer(int_4, def);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
143 def = defer(int_6, def);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS
Mike Pavone <pavone@retrodev.com>
parents: 148
diff changeset
144 }
139
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
145 uint32_t address;
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
146 while(def) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
147 do {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
148 encoded = NULL;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
149 address = def->address;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
150 if (!is_visited(address)) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
151 encoded = filebuf + address/2;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
152 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
153 tmpd = def;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
154 def = def->next;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
155 free(tmpd);
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
156 } while(def && encoded == NULL);
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
157 if (!encoded) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
158 break;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
159 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
160 for(;;) {
48
0bdda50c7364 Don't try to disassemble addresses beyond the end of the cartridge
Mike Pavone <pavone@retrodev.com>
parents: 47
diff changeset
161 if (address > filesize) {
0bdda50c7364 Don't try to disassemble addresses beyond the end of the cartridge
Mike Pavone <pavone@retrodev.com>
parents: 47
diff changeset
162 break;
0bdda50c7364 Don't try to disassemble addresses beyond the end of the cartridge
Mike Pavone <pavone@retrodev.com>
parents: 47
diff changeset
163 }
47
4b6c667326a1 Fix bug in address visitation in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 44
diff changeset
164 visit(address);
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
165 next = m68k_decode(encoded, &instbuf, address);
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
166 address += (next-encoded)*2;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
167 encoded = next;
111
8b50d2c975b2 Fix decoding of Scc
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
168 //m68k_disasm(&instbuf, disbuf);
8b50d2c975b2 Fix decoding of Scc
Mike Pavone <pavone@retrodev.com>
parents: 103
diff changeset
169 //printf("%X: %s\n", instbuf.address, disbuf);
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
170 check_reference(&instbuf, &(instbuf.src));
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
171 check_reference(&instbuf, &(instbuf.dst));
148
4a400aec81bb Bail out of disassembly of a particular stream when we hit an invalid instruction
Mike Pavone <pavone@retrodev.com>
parents: 139
diff changeset
172 if (instbuf.op == M68K_ILLEGAL || instbuf.op == M68K_RTS || instbuf.op == M68K_RTE || instbuf.op == M68K_INVALID) {
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
173 break;
164
afbfb0ac0256 Small fix to disassembler
Mike Pavone <pavone@retrodev.com>
parents: 151
diff changeset
174 }
afbfb0ac0256 Small fix to disassembler
Mike Pavone <pavone@retrodev.com>
parents: 151
diff changeset
175 if (instbuf.op == M68K_BCC || instbuf.op == M68K_DBCC || instbuf.op == M68K_BSR) {
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
176 if (instbuf.op == M68K_BCC && instbuf.extra.cond == COND_TRUE) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
177 address = instbuf.address + 2 + instbuf.src.params.immed;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
178 encoded = filebuf + address/2;
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
179 reference(address);
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
180 if (is_visited(address)) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
181 break;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
182 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
183 } else {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
184 tmp_addr = instbuf.address + 2 + instbuf.src.params.immed;
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
185 reference(tmp_addr);
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
186 def = defer(tmp_addr, def);
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
187 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
188 } else if(instbuf.op == M68K_JMP) {
80
7b1e16e981ef Fix bug in disassembler that caused it to disassemble addresses it shouldn't
Mike Pavone <pavone@retrodev.com>
parents: 48
diff changeset
189 if (instbuf.src.addr_mode == MODE_ABSOLUTE || instbuf.src.addr_mode == MODE_ABSOLUTE_SHORT) {
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
190 address = instbuf.src.params.immed;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
191 encoded = filebuf + address/2;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
192 if (is_visited(address)) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
193 break;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
194 }
114
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
195 } else if (instbuf.src.addr_mode = MODE_PC_DISPLACE) {
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
196 address = instbuf.src.params.regs.displacement + instbuf.address + 2;
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
197 encoded = filebuf + address/2;
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
198 if (is_visited(address)) {
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
199 break;
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
200 }
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
201 } else {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
202 break;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
203 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
204 } else if(instbuf.op == M68K_JSR) {
80
7b1e16e981ef Fix bug in disassembler that caused it to disassemble addresses it shouldn't
Mike Pavone <pavone@retrodev.com>
parents: 48
diff changeset
205 if (instbuf.src.addr_mode == MODE_ABSOLUTE || instbuf.src.addr_mode == MODE_ABSOLUTE_SHORT) {
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
206 def = defer(instbuf.src.params.immed, def);
164
afbfb0ac0256 Small fix to disassembler
Mike Pavone <pavone@retrodev.com>
parents: 151
diff changeset
207 } else if (instbuf.src.addr_mode == MODE_PC_DISPLACE) {
114
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 111
diff changeset
208 def = defer(instbuf.src.params.regs.displacement + instbuf.address + 2, def);
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
209 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
210 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
211 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
212 }
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
213 if (labels) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
214 for (address = filesize; address < (16*1024*1024); address++) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
215 if (is_label(address)) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
216 printf("ADR_%X equ $%X\n", address, address);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
217 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
218 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
219 puts("");
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
220 }
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
221 for (address = 0; address < filesize; address+=2) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
222 if (is_visited(address)) {
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
223 encoded = filebuf + address/2;
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
224 m68k_decode(encoded, &instbuf, address);
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
225 if (labels) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
226 m68k_disasm_labels(&instbuf, disbuf);
139
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
227 if (address == start) {
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
228 puts("start:");
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
229 }
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
230 if(address == int_2) {
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
231 puts("int_2:");
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
232 }
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
233 if(address == int_4) {
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
234 puts("int_4:");
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
235 }
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
236 if(address == int_6) {
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
237 puts("int_6:");
cce22fb4c450 Properly support references to odd addresses in label generation in disassembler. Add labels for start and interrupts.
Mike Pavone <pavone@retrodev.com>
parents: 134
diff changeset
238 }
134
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
239 if (is_label(instbuf.address)) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
240 printf("ADR_%X:\n", instbuf.address);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
241 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
242 if (addr) {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
243 printf("\t%s\t;%X\n", disbuf, instbuf.address);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
244 } else {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
245 printf("\t%s\n", disbuf);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
246 }
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
247 } else {
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
248 m68k_disasm(&instbuf, disbuf);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
249 printf("%X: %s\n", instbuf.address, disbuf);
ab50421b1b7a Improve disassembler
Mike Pavone <pavone@retrodev.com>
parents: 114
diff changeset
250 }
44
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
251 }
ec71370820f2 Add logic for following control flow based on logic in the translator
Mike Pavone <pavone@retrodev.com>
parents: 20
diff changeset
252 }
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
253 return 0;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
254 }