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annotate trans.c @ 1680:326d1a601fb9

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Fixed crash bug that could occur in a narrow window of time when loading a ROM
author Michael Pavone <pavone@retrodev.com>
date Thu, 17 Jan 2019 10:00:24 -0800
parents 5b90d7669eee
children 2455662378ed 0c1491818f4b
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #include "68kinst.h"
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7 #include "m68k_core.h"
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8 #include "mem.h"
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <string.h>
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12
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13 int headless = 1;
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14 void render_errorbox(char * title, char * buf)
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15 {
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16 }
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17
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18 void render_infobox(char * title, char * buf)
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19 {
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20 }
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21
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22 m68k_context * sync_components(m68k_context * context, uint32_t address)
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23 {
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24 if (context->current_cycle > 0x80000000) {
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25 context->current_cycle -= 0x80000000;
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26 }
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27 if (context->status & M68K_STATUS_TRACE || context->trace_pending) {
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28 context->target_cycle = context->current_cycle;
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29 }
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30 return context;
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31 }
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32
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33 m68k_context *reset_handler(m68k_context *context)
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34 {
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35 m68k_print_regs(context);
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36 exit(0);
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37 //unreachable
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38 return context;
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39 }
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40
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41 int main(int argc, char ** argv)
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42 {
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43 long filesize;
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44 unsigned short *filebuf;
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45 char disbuf[1024];
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46 unsigned short * cur;
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47 m68k_options opts;
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48 FILE * f = fopen(argv[1], "rb");
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49 fseek(f, 0, SEEK_END);
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50 filesize = ftell(f);
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51 fseek(f, 0, SEEK_SET);
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52 filebuf = malloc(0x400000);
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53 memset(filebuf, 0, 0x400000);
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54 fread(filebuf, 2, filesize/2 > 0x200000 ? 0x200000 : filesize/2, f);
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55 fclose(f);
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56 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
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57 {
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58 *cur = (*cur >> 8) | (*cur << 8);
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59 }
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60 memmap_chunk memmap[2];
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61 memset(memmap, 0, sizeof(memmap_chunk)*2);
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62 memmap[0].end = 0x400000;
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63 memmap[0].mask = 0xFFFFFF;
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64 memmap[0].flags = MMAP_READ;
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65 memmap[0].buffer = filebuf;
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66
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67 memmap[1].start = 0xE00000;
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68 memmap[1].end = 0x1000000;
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69 memmap[1].mask = 0xFFFF;
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70 memmap[1].flags = MMAP_READ | MMAP_WRITE | MMAP_CODE;
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71 memmap[1].buffer = malloc(64 * 1024);
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72 memset(memmap[1].buffer, 0, 64 * 1024);
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73 init_m68k_opts(&opts, memmap, 2, 1);
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74 m68k_context * context = init_68k_context(&opts, reset_handler);
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75 context->mem_pointers[0] = memmap[0].buffer;
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76 context->mem_pointers[1] = memmap[1].buffer;
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77 context->target_cycle = context->sync_cycle = 0x80000000;
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78 uint32_t address;
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79 address = filebuf[2] << 16 | filebuf[3];
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80 translate_m68k_stream(address, context);
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81 m68k_reset(context);
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82 return 0;
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83 }
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84