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annotate objgrep/dumpmatch.c @ 207:d12a3207b1aa

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D-Sample 20020917 firmware analysis
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Fri, 01 Jan 2016 23:24:05 +0000
parents 77cd647375e5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * objgrep: output on matches
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include <stdint.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include "intstruct.h"
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12 #include "coffconst.h"
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13 #include "globals.h"
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14
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15 extern unsigned get_u16(), get_u32();
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16
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17 dump_symtab_on_match()
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18 {
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19 unsigned n;
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20 struct internal_syment *sym;
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21
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22 printf("\nThis source section's symbols:\n\n");
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23 for (n = 0; n < nsymtab; n++) {
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24 sym = symtab[n];
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25 if (!sym)
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26 continue;
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27 if (sym->section != grep_section)
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28 continue;
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29 switch (sym->class) {
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30 case C_EXT:
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31 printf("%s = %08X\n", sym->name,
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32 sym->value + match_offset);
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33 continue;
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34 case C_STAT:
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35 printf("%s:%s = %08X\n", objfilename, sym->name,
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36 sym->value + match_offset);
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37 continue;
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38 }
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39 }
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40 }
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41
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42 static unsigned
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43 arm_branch_reloc(location)
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44 unsigned location;
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45 {
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46 unsigned word, dest;
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47
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48 word = get_u32(binfilemap + location);
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49 dest = (word & 0x00FFFFFF) << 2;
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50 if (dest & 0x02000000)
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51 dest |= 0xFC000000;
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52 dest += location + 8;
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53 return(dest);
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54 }
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55
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56 static unsigned
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57 thumb_bl_reloc(location)
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58 unsigned location;
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59 {
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60 unsigned ins1, ins2;
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61 unsigned dest;
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62
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63 ins1 = get_u16(binfilemap + location);
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64 ins2 = get_u16(binfilemap + location + 2);
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65 dest = ((ins1 & 0x7FF) << 12) | ((ins2 & 0x7FF) << 1);
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66 if (dest & 0x00400000)
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67 dest |= 0xFF800000;
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68 dest += location + 4;
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69 return(dest);
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70 }
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71
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72 process_relocs_on_match()
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73 {
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74 unsigned n, value;
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75 struct internal_reloc *rel;
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76
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77 for (n = 0, rel = relocs; n < grep_section->nreloc; n++, rel++) {
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78 switch (rel->type) {
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79 case RTYPE_LONG:
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80 value = get_u32(binfilemap + match_offset +
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81 rel->location);
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82 break;
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83 case RTYPE_ARM_B:
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84 value = arm_branch_reloc(match_offset + rel->location);
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85 break;
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86 case RTYPE_THUMB_BL:
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87 value = thumb_bl_reloc(match_offset + rel->location);
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88 break;
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89 default:
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90 fprintf(stderr,
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91 "BUG in dump_relocs_on_match(): bad reloc type\n");
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92 abort();
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93 }
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94 value -= rel->addend;
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95 rel->symvalue = value;
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96 if (rel->secbase) {
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97 if (!rel->secbase->recov_flag) {
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98 rel->secbase->recov_flag = 1;
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99 rel->secbase->recov_addr = value;
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100 } else if (rel->secbase->recov_addr != value)
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101 printf("Multiple addresses for %s:%s: %08X, %08X\n",
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102 objfilename, rel->secbase->name,
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103 rel->secbase->recov_addr, value);
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104 }
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105 }
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106 }
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107
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108 dump_ext_relocs_on_match()
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109 {
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110 unsigned n;
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111 struct internal_reloc *rel;
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112
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113 printf("\nExternals deduced from relocs:\n\n");
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114 for (n = 0, rel = relocs; n < grep_section->nreloc; n++, rel++)
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115 if (rel->extsym)
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116 printf("%s = %08X\n", rel->extsym->name, rel->symvalue);
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117 }
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118
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119 dump_reloc_symtab_on_match()
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120 {
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121 unsigned n;
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122 struct internal_syment *sym;
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123
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124 printf("\nThis module's symbols deduced from section relocs:\n\n");
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125 for (n = 0; n < nsymtab; n++) {
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126 sym = symtab[n];
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127 if (!sym || !sym->section)
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128 continue;
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129 if (!sym->section->recov_flag)
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130 continue;
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131 switch (sym->class) {
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132 case C_EXT:
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133 printf("%s = %08X\n", sym->name,
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134 sym->value + sym->section->recov_addr);
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135 continue;
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136 case C_STAT:
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137 printf("%s:%s = %08X\n", objfilename, sym->name,
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138 sym->value + sym->section->recov_addr);
77cd647375e5 objgrep -r: dump symbols in other sections recovered through relocs
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 172
diff changeset
139 continue;
77cd647375e5 objgrep -r: dump symbols in other sections recovered through relocs
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 172
diff changeset
140 }
77cd647375e5 objgrep -r: dump symbols in other sections recovered through relocs
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 172
diff changeset
141 }
77cd647375e5 objgrep -r: dump symbols in other sections recovered through relocs
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 172
diff changeset
142 }