Mercurial > repos > blastem

annotate dis.c @ 9:0a0cd3705c19

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Implement (possibly broken) decoding of all M68000 instructions not in the OR_DIV_SBCD group
author Mike Pavone <pavone@retrodev.com>
date Tue, 13 Nov 2012 18:26:43 -0800
parents 23b83d94c633
children 168b1a873895
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
1 #include "68kinst.h"
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
2 #include <stdio.h>
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
3 #include <stdlib.h>
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
4
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
5 int main(int argc, char ** argv)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
6 {
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
7 long filesize;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
8 unsigned short *filebuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
9 char disbuf[1024];
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
10 m68kinst instbuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
11 unsigned short * cur;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
12 FILE * f = fopen(argv[1], "rb");
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
13 fseek(f, 0, SEEK_END);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
14 filesize = ftell(f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
15 fseek(f, 0, SEEK_SET);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
16 filebuf = malloc(filesize);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
17 fread(filebuf, 2, filesize/2, f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
18 fclose(f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
19 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
20 {
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
21 *cur = (*cur >> 8) | (*cur << 8);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
22 }
8
23b83d94c633 Finish bit/movep/immediate group except for 68020 instructions
Mike Pavone <pavone@retrodev.com>
parents: 2
diff changeset
23 for(cur = filebuf; (cur - filebuf) < (filesize/2); )
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
24 {
8
23b83d94c633 Finish bit/movep/immediate group except for 68020 instructions
Mike Pavone <pavone@retrodev.com>
parents: 2
diff changeset
25 //printf("cur: %p: %x\n", cur, *cur);
2
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
26 cur = m68K_decode(cur, &instbuf);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
27 m68k_disasm(&instbuf, disbuf);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
28 puts(disbuf);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
29 }
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
30 return 0;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
31 }