repos/blastem: dis.c annotate

annotate dis.c @ 2085:1ff67ce37085

Add some Sega CD specific enhancements to disassembler

author	Michael Pavone <pavone@retrodev.com>
date	Sat, 05 Feb 2022 16:38:39 -0800
parents	460e14497120
children	36a9cf4db65f

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
631 de6f00204fa2 Add support for disassembling VOS program modules 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: 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>
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	9 #include <string.h>
805 3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	10 #include <stdarg.h>
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	11 #include <ctype.h>
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	12 #include "vos_program_module.h"
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	13 #include "tern.h"
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	14 #include "util.h"
2 5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	15
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	16 uint8_t visited[(1610241024)/16];
635 6992a1b07714 Fix logic for automatic label generation. Michael Pavone <pavone@retrodev.com> parents: 634 diff changeset	17 uint16_t label[(1610241024)/8];
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	18
805 3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	19 void fatal_error(char *format, ...)
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	20 {
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	21 va_list args;
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	22 va_start(args, format);
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	23 vfprintf(stderr, format, args);
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	24 va_end(args);
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	25 exit(1);
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	26 }
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	27
3eced113081c Pre-release cleanup Michael Pavone <pavone@retrodev.com> parents: 704 diff changeset	28
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	29 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	30 {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	31 address &= 0xFFFFFF;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	32 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	33 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	34
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	35 void reference(uint32_t address)
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 address &= 0xFFFFFF;
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	38 //printf("referenced: %X\n", address);
635 6992a1b07714 Fix logic for automatic label generation. Michael Pavone <pavone@retrodev.com> parents: 634 diff changeset	39 label[address/16] \|= 1 << (address % 16);
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	40 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	41
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	42 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	43 {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	44 address &= 0xFFFFFF;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	45 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	46 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	47
635 6992a1b07714 Fix logic for automatic label generation. Michael Pavone <pavone@retrodev.com> parents: 634 diff changeset	48 uint16_t is_label(uint32_t address)
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	49 {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	50 address &= 0xFFFFFF;
635 6992a1b07714 Fix logic for automatic label generation. Michael Pavone <pavone@retrodev.com> parents: 634 diff changeset	51 return label[address/16] & (1 << (address % 16));
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	52 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	53
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	54 typedef struct {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	55 uint32_t num_labels;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	56 uint32_t storage;
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	57 uint32_t full_address;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	58 char *labels[];
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	59 } label_names;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	60
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	61 tern_node * weak_label(tern_node * head, const char *name, uint32_t address)
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	62 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	63 char key[MAX_INT_KEY_SIZE];
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	64 tern_int_key(address & 0xFFFFFF, key);
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	65 label_names * names = tern_find_ptr(head, key);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	66 if (names)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	67 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	68 if (names->num_labels == names->storage)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	69 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	70 names->storage = names->storage + (names->storage >> 1);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	71 names = realloc(names, sizeof(label_names) + names->storage * sizeof(char *));
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	72 }
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	73 } else {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	74 names = malloc(sizeof(label_names) + 4 * sizeof(char *));
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	75 names->num_labels = 0;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	76 names->storage = 4;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	77 head = tern_insert_ptr(head, key, names);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	78 }
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	79 names->labels[names->num_labels++] = strdup(name);
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	80 names->full_address = address;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	81 return head;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	82 }
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	83 tern_node add_label(tern_node head, const char *name, uint32_t address)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	84 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	85 reference(address);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	86 return weak_label(head, name, address);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	87 }
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	88
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	89 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	90 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	91 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	92 } deferred;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	93
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	94 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	95 {
639 e263e1ac6038 Ignore odd addresses in calls to defer in disassembler Michael Pavone <pavone@retrodev.com> parents: 635 diff changeset	96 if (is_visited(address) \|\| address & 1) {
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	97 return next;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	98 }
111 8b50d2c975b2 Fix decoding of Scc Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	99 //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	100 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	101 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	102 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	103 return d;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	104 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	105
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	106 void check_reference(m68kinst * inst, m68k_op_info * op)
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	107 {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	108 switch(op->addr_mode)
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	109 {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	110 case MODE_PC_DISPLACE:
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	111 reference(inst->address + 2 + op->params.regs.displacement);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	112 break;
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	113 case MODE_ABSOLUTE:
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	114 case MODE_ABSOLUTE_SHORT:
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	115 reference(op->params.immed);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	116 break;
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	117 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	118 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	119
634 4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	120 int label_fun(char dst, uint32_t address, void data)
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	121 {
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	122 tern_node * labels = data;
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	123 char key[MAX_INT_KEY_SIZE];
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	124 label_names * names = tern_find_ptr(labels, tern_int_key(address & 0xFFFFFF, key));
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	125 if (names)
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	126 {
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	127 return sprintf(dst, "%s", names->labels[0]);
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	128 } else {
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	129 return m68k_default_label_fun(dst, address, NULL);
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	130 }
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	131 }
4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	132
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	133 char * strip_ws(char * text)
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	134 {
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	135 while (text && (!isprint(text) \|\| isblank(*text)))
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	136 {
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	137 text++;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	138 }
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	139 char * ret = text;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	140 text = ret + strlen(ret) - 1;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	141 while (text > ret && (!isprint(text) \|\| isblank(text)))
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	142 {
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	143 *text = 0;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	144 text--;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	145 }
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	146 return ret;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	147 }
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	148
2 5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	149 int main(int argc, char ** argv)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	150 {
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	151 long filesize;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	152 unsigned short *filebuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	153 char disbuf[1024];
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	154 m68kinst instbuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	155 unsigned short * cur;
151 6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	156 deferred def = NULL, tmpd;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	157
632 80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	158 uint8_t labels = 0, addr = 0, only = 0, vos = 0, reset = 0;
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	159 tern_node * named_labels = NULL;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	160
1078 c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	161 uint32_t address_off = 0, address_end;
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	162 uint8_t do_cd_labels = 0;
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	163 for(uint8_t opt = 2; opt < argc; ++opt) {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	164 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	165 FILE * address_log;
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	166 switch (argv[opt][1])
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	167 {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	168 case 'l':
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	169 labels = 1;
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	170 break;
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	171 case 'a':
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	172 addr = 1;
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	173 break;
151 6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	174 case 'o':
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	175 only = 1;
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	176 break;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	177 case 'v':
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	178 vos = 1;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	179 break;
632 80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	180 case 'r':
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	181 reset = 1;
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	182 break;
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	183 case 'c':
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	184 do_cd_labels = 1;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	185 break;
1078 c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	186 case 's':
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	187 opt++;
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	188 if (opt >= argc) {
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	189 fputs("-s must be followed by an offset\n", stderr);
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	190 exit(1);
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	191 }
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	192 address_off = strtol(argv[opt], NULL, 0);
c4bfbf55d418 Added some hacky support for specifying a start offset in 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 947 diff changeset	193 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	194 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	195 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	196 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	197 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	198 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	199 }
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	200 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	201 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	202 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	203 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	204 }
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	205 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	206 if (disbuf[0]) {
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	207 char *end;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	208 uint32_t address = strtol(disbuf, &end, 16);
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	209 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	210 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	211 reference(address);
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	212 if (*end == '=') {
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	213 named_labels = add_label(named_labels, strip_ws(end+1), address);
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	214 }
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	215 }
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	216 }
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	217 }
1594 137dbd05ceab Fix some issues identified by cppcheck Michael Pavone <pavone@retrodev.com> parents: 1078 diff changeset	218 fclose(address_log);
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	219 }
151 6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	220 } else {
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	221 char *end;
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	222 uint32_t address = strtol(argv[opt], &end, 16);
151 6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	223 def = defer(address, def);
6b593ea0ed90 Implement MULU/MULS and DIVU/DIVS Mike Pavone <pavone@retrodev.com> parents: 148 diff changeset	224 reference(address);
947 d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	225 if (*end == '=') {
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	226 named_labels = add_label(named_labels, end+1, address);
d29722e3359c Allow specification of named labels as command line arguments to the 68K disassembler Michael Pavone <pavone@retrodev.com> parents: 805 diff changeset	227 }
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	228 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	229 }
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	230 FILE * f = fopen(argv[1], "rb");
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	231 fseek(f, 0, SEEK_END);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	232 filesize = ftell(f);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	233 fseek(f, 0, SEEK_SET);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	234
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	235 char int_key[MAX_INT_KEY_SIZE];
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	236 if (vos)
2 5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	237 {
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	238 vos_program_module header;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	239 vos_read_header(f, &header);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	240 vos_read_alloc_module_map(f, &header);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	241 address_off = header.user_boundary;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	242 address_end = address_off + filesize - 0x1000;
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	243 def = defer(header.main_entry_link.code_address, def);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	244 named_labels = add_label(named_labels, "main_entry_link", header.main_entry_link.code_address);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	245 for (int i = 0; i < header.n_modules; i++)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	246 {
632 80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	247 if (!reset \|\| header.module_map_entries[i].code_address != header.user_boundary)
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	248 {
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	249 def = defer(header.module_map_entries[i].code_address, def);
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	250 }
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	251 named_labels = add_label(named_labels, header.module_map_entries[i].name.str, header.module_map_entries[i].code_address);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	252 }
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	253 fseek(f, 0x1000, SEEK_SET);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	254 filebuf = malloc(filesize - 0x1000);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	255 if (fread(filebuf, 2, (filesize - 0x1000)/2, f) != (filesize - 0x1000)/2)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	256 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	257 fprintf(stderr, "Failure while reading file %s\n", argv[1]);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	258 }
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	259 fclose(f);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	260 for(cur = filebuf; cur - filebuf < ((filesize - 0x1000)/2); ++cur)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	261 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	262 cur = (cur >> 8) \| (*cur << 8);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	263 }
632 80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	264 if (reset)
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	265 {
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	266 def = defer(filebuf[2] << 16 \| filebuf[3], def);
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	267 named_labels = add_label(named_labels, "reset", filebuf[2] << 16 \| filebuf[3]);
80e111b48d4b Add -r option to indicate VOS program module contains a 68K reset vector Michael Pavone <pavone@retrodev.com> parents: 631 diff changeset	268 }
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	269 } else if (filesize > 0x1000) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	270 long boot_size = filesize > (321024) ? 321024 : filesize;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	271 filebuf = malloc(boot_size);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	272 if (fread(filebuf, 1, boot_size, f) != boot_size) {
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	273 fprintf(stderr, "Failure while reading file %s\n", argv[1]);
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	274 return 1;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	275 }
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	276 uint8_t is_scd_iso = !memcmp("SEGADISCSYSTEM ", filebuf, 0x10);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	277 if (!is_scd_iso && !memcmp("SEGADISCSYSTEM ", filebuf + 0x8, 0x10)) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	278 is_scd_iso = 1;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	279 uint32_t end = 16 * 2352;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	280 if (end > filesize) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	281 end = (filesize / 2352) * 2352;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	282 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	283 for(uint32_t offset = 0x10, dst_offset = 0; offset < end; offset += 2352, dst_offset += 2048)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	284 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	285 memmove(filebuf + dst_offset/2, filebuf + offset/2, 2048);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	286 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	287 boot_size = (end / 2352) * 2048;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	288 }
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	289 if (is_scd_iso) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	290 for(cur = filebuf; cur - filebuf < (boot_size/2); ++cur)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	291 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	292 cur = (cur >> 8) \| (*cur << 8);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	293 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	294 uint32_t sub_start =filebuf[0x40/2] << 16 \| filebuf[0x42/2];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	295 uint32_t sub_end =filebuf[0x44/2] << 16 \| filebuf[0x46/2];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	296 if (sub_start > (boot_size - 0x20)) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	297 fprintf(stderr, "System Program start offset is %X, but image is only %X bytes\n", sub_start, (uint32_t)boot_size);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	298 return 1;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	299 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	300 if (sub_end > boot_size) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	301 sub_end = boot_size;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	302 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	303 uint32_t offset_start = (filebuf[(sub_start + 0x18)/2] << 16 \| filebuf[(sub_start + 0x1A)/2]) + sub_start;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	304 uint8_t has_manual_defs = !!def;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	305 for(uint32_t cur = offset_start, index = 0; cur < sub_end && filebuf[cur/2]; cur+=2, ++index)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	306 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	307 uint32_t offset = offset_start + filebuf[cur/2];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	308 if (offset >= boot_size) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	309 break;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	310 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	311 static const char* fixed_names[3] = {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	312 "init",
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	313 "main",
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	314 "int_2"
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	315 };
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	316 char namebuf[32];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	317 const char *name;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	318 if (index < 3) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	319 name = fixed_names[index];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	320 } else {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	321 name = namebuf;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	322 sprintf(namebuf, "usercall%u", index);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	323 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	324 uint32_t address = 0x6000 + offset - sub_start;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	325 named_labels = add_label(named_labels, name, address);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	326 if (!has_manual_defs \|\| !only) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	327 def = defer(address, def);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	328 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	329 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	330 do_cd_labels = 1;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	331 filebuf += sub_start / 2;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	332 address_off = 0x6000;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	333 address_end = sub_end-sub_start + address_off;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	334 } else {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	335 if (filesize > (32*1024)) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	336 filebuf = realloc(f, filesize);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	337 fseek(f, 32*1024, SEEK_SET);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	338 uint32_t to_read = filesize/2 - 16*1024;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	339 if (fread(filebuf, 2, to_read, f) != to_read)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	340 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	341 fprintf(stderr, "Failure while reading file %s\n", argv[1]);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	342 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	343 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	344 address_end = address_off + filesize;
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	345 fclose(f);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	346 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	347 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	348 cur = (cur >> 8) \| (*cur << 8);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	349 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	350 if (!address_off) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	351 uint32_t start = filebuf[2] << 16 \| filebuf[3];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	352 uint32_t int_2 = filebuf[0x68/2] << 16 \| filebuf[0x6A/2];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	353 uint32_t int_4 = filebuf[0x70/2] << 16 \| filebuf[0x72/2];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	354 uint32_t int_6 = filebuf[0x78/2] << 16 \| filebuf[0x7A/2];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	355 named_labels = add_label(named_labels, "start", start);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	356 named_labels = add_label(named_labels, "int_2", int_2);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	357 named_labels = add_label(named_labels, "int_4", int_4);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	358 named_labels = add_label(named_labels, "int_6", int_6);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	359 if (!def \|\| !only) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	360 def = defer(start, def);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	361 def = defer(int_2, def);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	362 def = defer(int_4, def);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	363 def = defer(int_6, def);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	364 }
2044 460e14497120 zlib support in vgmplay Michael Pavone <pavone@retrodev.com> parents: 1892 diff changeset	365 }
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	366 }
2 5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	367 }
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	368 if (do_cd_labels) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	369 named_labels = weak_label(named_labels, "bios_common_work", 0x5E80);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	370 named_labels = weak_label(named_labels, "_setjmptbl", 0x5F0A);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	371 named_labels = weak_label(named_labels, "_waitvsync", 0x5F10);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	372 named_labels = weak_label(named_labels, "_buram", 0x5F16);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	373 named_labels = weak_label(named_labels, "_cdboot", 0x5F1C);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	374 named_labels = weak_label(named_labels, "_cdbios", 0x5F22);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	375 named_labels = weak_label(named_labels, "_usercall0", 0x5F28);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	376 named_labels = weak_label(named_labels, "_usercall1", 0x5F2E);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	377 named_labels = weak_label(named_labels, "_usercall2", 0x5F34);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	378 named_labels = weak_label(named_labels, "_usercall2Address", 0x5F36);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	379 named_labels = weak_label(named_labels, "_usercall3", 0x5F3A);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	380 named_labels = weak_label(named_labels, "_slevel1", 0x5F76);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	381 named_labels = weak_label(named_labels, "_slevel1Address", 0x5F78);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	382 named_labels = weak_label(named_labels, "_slevel2", 0x5F7C);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	383 named_labels = weak_label(named_labels, "_slevel2Address", 0x5F7E);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	384 named_labels = weak_label(named_labels, "_slevel3", 0x5F82);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	385 named_labels = weak_label(named_labels, "_slevel3Address", 0x5F84);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	386 named_labels = weak_label(named_labels, "LED_CONTROL", 0xFFFF8000);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	387 named_labels = weak_label(named_labels, "VERSION_RESET", 0xFFFF8001);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	388 named_labels = weak_label(named_labels, "MEM_MODE_WORD", 0xFFFF8002);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	389 named_labels = weak_label(named_labels, "MEM_MODE_BYTE", 0xFFFF8003);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	390 named_labels = weak_label(named_labels, "CDC_CTRL", 0xFFFF8004);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	391 named_labels = weak_label(named_labels, "CDC_AR", 0xFFFF8005);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	392 named_labels = weak_label(named_labels, "CDC_REG_DATA_WORD", 0xFFFF8006);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	393 named_labels = weak_label(named_labels, "CDC_REG_DATA", 0xFFFF8007);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	394 named_labels = weak_label(named_labels, "CDC_HOST_DATA", 0xFFFF8008);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	395 named_labels = weak_label(named_labels, "CDC_DMA_ADDR", 0xFFFF800A);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	396 named_labels = weak_label(named_labels, "COMM_CMD0", 0xFFFF8010);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	397 named_labels = weak_label(named_labels, "COMM_CMD1", 0xFFFF8012);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	398 named_labels = weak_label(named_labels, "COMM_CMD2", 0xFFFF8014);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	399 named_labels = weak_label(named_labels, "COMM_CMD3", 0xFFFF8016);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	400 named_labels = weak_label(named_labels, "COMM_CMD4", 0xFFFF8018);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	401 named_labels = weak_label(named_labels, "COMM_CMD5", 0xFFFF801A);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	402 named_labels = weak_label(named_labels, "COMM_CMD6", 0xFFFF801C);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	403 named_labels = weak_label(named_labels, "COMM_CMD7", 0xFFFF801E);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	404 named_labels = weak_label(named_labels, "COMM_STATUS0", 0xFFFF8020);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	405 named_labels = weak_label(named_labels, "COMM_STATUS1", 0xFFFF8022);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	406 named_labels = weak_label(named_labels, "COMM_STATUS2", 0xFFFF8024);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	407 named_labels = weak_label(named_labels, "COMM_STATUS3", 0xFFFF8026);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	408 named_labels = weak_label(named_labels, "COMM_STATUS4", 0xFFFF8028);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	409 named_labels = weak_label(named_labels, "COMM_STATUS5", 0xFFFF802A);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	410 named_labels = weak_label(named_labels, "COMM_STATUS6", 0xFFFF802C);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	411 named_labels = weak_label(named_labels, "COMM_STATUS7", 0xFFFF802E);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	412 named_labels = weak_label(named_labels, "TIMER_WORD", 0xFFFF8030);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	413 named_labels = weak_label(named_labels, "TIMER", 0xFFFF8031);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	414 named_labels = weak_label(named_labels, "INT_MASK_WORD", 0xFFFF8032);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	415 named_labels = weak_label(named_labels, "INT_MASK", 0xFFFF8033);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	416 }
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	417 uint16_t encoded, next;
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	418 uint32_t size, tmp_addr;
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	419 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	420 while(def) {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	421 do {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	422 encoded = NULL;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	423 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	424 if (!is_visited(address)) {
1892 1afd6e85ec26 Properly mask addresses to 24-bit in disassembler Michael Pavone <pavone@retrodev.com> parents: 1594 diff changeset	425 encoded = filebuf + ((address & 0xFFFFFF) - address_off)/2;
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	426 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	427 tmpd = def;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	428 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	429 free(tmpd);
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	430 } 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	431 if (!encoded) {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	432 break;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	433 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	434 for(;;) {
1892 1afd6e85ec26 Properly mask addresses to 24-bit in disassembler Michael Pavone <pavone@retrodev.com> parents: 1594 diff changeset	435 if ((address & 0xFFFFFF) > address_end \|\| address < address_off) {
48 0bdda50c7364 Don't try to disassemble addresses beyond the end of the cartridge Mike Pavone <pavone@retrodev.com> parents: 47 diff changeset	436 break;
0bdda50c7364 Don't try to disassemble addresses beyond the end of the cartridge Mike Pavone <pavone@retrodev.com> parents: 47 diff changeset	437 }
47 4b6c667326a1 Fix bug in address visitation in disassembler Mike Pavone <pavone@retrodev.com> parents: 44 diff changeset	438 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	439 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	440 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	441 encoded = next;
111 8b50d2c975b2 Fix decoding of Scc Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	442 //m68k_disasm(&instbuf, disbuf);
8b50d2c975b2 Fix decoding of Scc Mike Pavone <pavone@retrodev.com> parents: 103 diff changeset	443 //printf("%X: %s\n", instbuf.address, disbuf);
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	444 check_reference(&instbuf, &(instbuf.src));
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	445 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	446 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	447 break;
164 afbfb0ac0256 Small fix to disassembler Mike Pavone <pavone@retrodev.com> parents: 151 diff changeset	448 }
afbfb0ac0256 Small fix to disassembler Mike Pavone <pavone@retrodev.com> parents: 151 diff changeset	449 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	450 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	451 address = instbuf.address + 2 + instbuf.src.params.immed;
633 a759f4e38488 Fix translation of 68K address to buffer location when address_off != 0 Michael Pavone <pavone@retrodev.com> parents: 632 diff changeset	452 encoded = filebuf + (address - address_off)/2;
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	453 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	454 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	455 break;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	456 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	457 } else {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	458 tmp_addr = instbuf.address + 2 + instbuf.src.params.immed;
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	459 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	460 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	461 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	462 } 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	463 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	464 address = instbuf.src.params.immed;
633 a759f4e38488 Fix translation of 68K address to buffer location when address_off != 0 Michael Pavone <pavone@retrodev.com> parents: 632 diff changeset	465 encoded = filebuf + (address - address_off)/2;
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	466 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	467 break;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	468 }
564 316facea756d Fix PC displacement mode check in disassembler so that jmps involving a register are handled correctly Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	469 } 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	470 address = instbuf.src.params.regs.displacement + instbuf.address + 2;
633 a759f4e38488 Fix translation of 68K address to buffer location when address_off != 0 Michael Pavone <pavone@retrodev.com> parents: 632 diff changeset	471 encoded = filebuf + (address - address_off)/2;
114 e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler Mike Pavone <pavone@retrodev.com> parents: 111 diff changeset	472 if (is_visited(address)) {
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler Mike Pavone <pavone@retrodev.com> parents: 111 diff changeset	473 break;
e821b6fde0e4 Allow jmp/jsr to follow pc-relative addresses in disassembler Mike Pavone <pavone@retrodev.com> parents: 111 diff changeset	474 }
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	475 } else {
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	476 break;
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	477 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	478 } 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	479 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	480 def = defer(instbuf.src.params.immed, def);
164 afbfb0ac0256 Small fix to disassembler Mike Pavone <pavone@retrodev.com> parents: 151 diff changeset	481 } 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	482 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	483 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	484 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	485 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	486 }
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	487 if (labels) {
640 c806b96b86eb Add equates for address references below address_off Michael Pavone <pavone@retrodev.com> parents: 639 diff changeset	488 for (address = 0; address < address_off; address++) {
c806b96b86eb Add equates for address references below address_off Michael Pavone <pavone@retrodev.com> parents: 639 diff changeset	489 if (is_label(address)) {
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	490 char key[MAX_INT_KEY_SIZE];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	491 tern_int_key(address, key);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	492 label_names *names = tern_find_ptr(named_labels, key);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	493 if (names) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	494 for (int i = 0; i < names->num_labels; i++)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	495 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	496 printf("%s equ $%X\n", names->labels[i], address);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	497 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	498 } else {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	499 printf("ADR_%X equ $%X\n", address, address);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	500 }
640 c806b96b86eb Add equates for address references below address_off Michael Pavone <pavone@retrodev.com> parents: 639 diff changeset	501 }
c806b96b86eb Add equates for address references below address_off Michael Pavone <pavone@retrodev.com> parents: 639 diff changeset	502 }
2085 1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	503 for (address = address_end; address < (1610241024); address++) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	504 if (is_label(address)) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	505 char key[MAX_INT_KEY_SIZE];
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	506 tern_int_key(address, key);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	507 label_names *names = tern_find_ptr(named_labels, key);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	508 if (names) {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	509 for (int i = 0; i < names->num_labels; i++)
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	510 {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	511 printf("%s equ $%X\n", names->labels[i], names->full_address);
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	512 }
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	513 } else {
1ff67ce37085 Add some Sega CD specific enhancements to disassembler Michael Pavone <pavone@retrodev.com> parents: 2044 diff changeset	514 printf("ADR_%X equ $%X\n", address, address);
704 1a14f5f6c6a1 Properly print equ for named labels that point outside the cartridge area in disassembler Michael Pavone <pavone@retrodev.com> parents: 652 diff changeset	515 }
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	516 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	517 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	518 puts("");
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	519 }
633 a759f4e38488 Fix translation of 68K address to buffer location when address_off != 0 Michael Pavone <pavone@retrodev.com> parents: 632 diff changeset	520 for (address = address_off; address < address_end; address+=2) {
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	521 if (is_visited(address)) {
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	522 encoded = filebuf + (address-address_off)/2;
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	523 m68k_decode(encoded, &instbuf, address);
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	524 if (labels) {
634 4a6ec64acd79 Better support for labels sourced from VOS program module header Michael Pavone <pavone@retrodev.com> parents: 633 diff changeset	525 m68k_disasm_labels(&instbuf, disbuf, label_fun, named_labels);
631 de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	526 char keybuf[MAX_INT_KEY_SIZE];
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	527 label_names * names = tern_find_ptr(named_labels, tern_int_key(address, keybuf));
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	528 if (names)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	529 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	530 for (int i = 0; i < names->num_labels; i++)
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	531 {
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	532 printf("%s:\n", names->labels[i]);
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	533 }
de6f00204fa2 Add support for disassembling VOS program modules Michael Pavone <pavone@retrodev.com> parents: 467 diff changeset	534 } else if (is_label(instbuf.address)) {
134 ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	535 printf("ADR_%X:\n", instbuf.address);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	536 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	537 if (addr) {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	538 printf("\t%s\t;%X\n", disbuf, instbuf.address);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	539 } else {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	540 printf("\t%s\n", disbuf);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	541 }
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	542 } else {
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	543 m68k_disasm(&instbuf, disbuf);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	544 printf("%X: %s\n", instbuf.address, disbuf);
ab50421b1b7a Improve disassembler Mike Pavone <pavone@retrodev.com> parents: 114 diff changeset	545 }
44 ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	546 }
ec71370820f2 Add logic for following control flow based on logic in the translator Mike Pavone <pavone@retrodev.com> parents: 20 diff changeset	547 }
2 5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	548 return 0;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler. Mike Pavone <pavone@retrodev.com> parents: diff changeset	549 }

Mercurial > repos > blastem

annotate dis.c @ 2085:1ff67ce37085