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annotate arm7dis/armdis.c @ 87:f7fba8518fa2

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armdis: skeleton compiles
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sat, 29 Mar 2014 00:23:16 +0000
parents 537cf2245d98
children 691551f0635b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include <sys/types.h>
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4
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5 extern char *binfilename;
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6 extern u_char *filemap;
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7 extern unsigned disasm_len, base_vma;
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8
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9 extern unsigned get_u16(), get_u32();
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10
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11 extern char *regnames[16], *condition_decode[16];
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12
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13 static void
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14 arm_branch(off, word)
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15 unsigned off, word;
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16 {
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17 unsigned dest;
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18
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19 dest = (word & 0x00FFFFFF) << 2;
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20 if (dest & 0x02000000)
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21 dest |= 0xFC000000;
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22 dest += base_vma + off + 8;
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23 printf("b%s%s\t0x%x\n", word&0x1000000 ? "l" : "",
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24 condition_decode[word>>28], dest);
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25 }
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26
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27 void
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28 arm_disasm_line(off)
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29 unsigned off;
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30 {
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31 unsigned word;
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32
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33 word = get_u32(filemap + off);
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34 printf("%8x:\t%08x\t", base_vma + off, word);
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35 if ((word >> 28) == 0xF) {
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36 printf("invalid-F\n");
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37 return;
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38 }
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39 switch ((word >> 24) & 0xF) {
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40 case 0:
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41 case 1:
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42 printf("<data processing, register operand>\n");
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43 return;
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44 case 2:
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45 case 3:
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46 printf("<data processing, immediate operand>\n");
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47 return;
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48 case 4:
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49 case 5:
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50 printf("<ldr/str, immediate offset>\n");
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51 return;
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52 case 6:
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53 case 7:
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54 printf("<ldr/str, register offset>\n");
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55 return;
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56 case 8:
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57 case 9:
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58 printf("<ldm/stm>\n");
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59 return;
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60 case 0xA:
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61 case 0xB:
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62 arm_branch(off, word);
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63 return;
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64 case 0xC:
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65 case 0xD:
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66 case 0xE:
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67 printf("<COPROCESSOR>\n");
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68 return;
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69 case 0xF:
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70 printf("swi%s\t0x%x\n", condition_decode[word>>28],
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71 word & 0xFFFFFF);
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72 return;
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73 }
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74 }
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75
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76 main(argc, argv)
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77 char **argv;
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78 {
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79 unsigned off;
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80
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81 common_init(argc, argv, 4);
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82 for (off = 0; off < disasm_len; off += 4)
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83 arm_disasm_line(off);
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84 exit(0);
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85 }