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annotate ticoff/reloc.c @ 110:e650fdc743fe

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tiobjd: higher-level reloc handling
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Thu, 03 Apr 2014 03:03:41 +0000
parents c20dc315a9d4
children d97fbe98600b
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c20dc315a9d4 tiobjd: beginning of reloc handling
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1 /*
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2 * Handling of relocation records
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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 <stdlib.h>
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8 #include "filestruct.h"
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9 #include "intstruct.h"
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10 #include "coffconst.h"
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11 #include "globals.h"
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12
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13 extern unsigned get_u16(), get_u32();
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14
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15 cmd_rawrel()
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16 {
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17 unsigned n, m;
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18 struct internal_scnhdr *sec;
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19 struct external_reloc *rel;
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20
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21 get_int_section_table();
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22 for (n = 0; n < nsections; n++) {
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23 sec = sections + n;
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24 if (!sec->nreloc)
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25 continue;
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26 printf("%s:\n\n", sec->name);
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27 rel = (struct external_reloc *)(filemap + sec->reloc_offset);
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28 printf("Location SymIndex Rsvd Type\n");
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29 for (m = 0; m < sec->nreloc; m++, rel++)
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30 printf("%08X %08X %04X %04X\n",
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31 get_u32(rel->r_vaddr), get_u32(rel->r_symndx),
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32 get_u16(rel->r_reserved), get_u16(rel->r_type));
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33 putchar('\n');
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34 }
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35 exit(0);
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36 }
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37
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38 void
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39 get_relocs_of_sec(sec)
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40 struct internal_scnhdr *sec;
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41 {
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42 unsigned n;
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43 struct external_reloc *extrel;
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44 struct internal_reloc *intrel;
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45 unsigned lastloc, symidx;
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46
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47 if (sec->int_relocs)
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48 return;
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49 if (!sec->nreloc) {
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50 fprintf(stderr,
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51 "BUG: get_relocs_of_sec() called for section \"%s\" w/o relocs\n",
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52 sec->name);
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53 exit(1);
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54 }
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55 intrel = malloc(sizeof(struct internal_reloc) * sec->nreloc);
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56 if (!intrel) {
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57 perror("malloc");
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58 exit(1);
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59 }
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60 sec->int_relocs = intrel;
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61 extrel = (struct external_reloc *)(filemap + sec->reloc_offset);
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62 for (n = 0; n < sec->nreloc; n++, extrel++, intrel++) {
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63 intrel->location = get_u32(extrel->r_vaddr);
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64 if (n && intrel->location <= lastloc) {
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65 fprintf(stderr,
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66 "error: non-increasing reloc order in section \"%s\"\n",
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67 sec->name);
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68 exit(1);
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69 }
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70 lastloc = intrel->location;
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71 symidx = get_u32(extrel->r_symndx);
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72 if (symidx >= nsymtab || !symtab[symidx]) {
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73 fprintf(stderr,
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74 "error: reloc references invalid symbol #%u in section \"%s\"\n",
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75 symidx, sec->name);
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76 exit(1);
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77 }
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78 intrel->sym = symtab[symidx];
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79 intrel->type = get_u16(extrel->r_type);
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80 switch (intrel->type) {
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81 case RTYPE_LONG:
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82 intrel->typestr = "Word32";
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83 break;
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84 case RTYPE_THUMB_BL:
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85 intrel->typestr = "Thumb_BL";
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86 break;
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87 case RTYPE_ARM_B:
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88 intrel->typestr = "ARM_B";
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89 break;
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90 default:
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91 fprintf(stderr,
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92 "error: reloc in section \"%s\" of unexpected type 0x%x\n",
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93 sec->name, intrel->type);
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94 exit(1);
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95 }
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96 if (get_u16(extrel->r_reserved))
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97 fprintf(stderr,
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98 "warning: reloc in section \"%s\" has non-zero reserved field\n",
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99 sec->name);
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100 }
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101 }
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102
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103 cmd_reloc()
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104 {
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105 unsigned n, m;
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106 struct internal_scnhdr *sec;
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107 struct internal_reloc *rel;
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108
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109 get_int_section_table();
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110 get_int_symbol_table();
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111 for (n = 0; n < nsections; n++) {
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112 sec = sections + n;
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113 if (!sec->nreloc)
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114 continue;
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115 printf("%s:\n\n", sec->name);
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116 get_relocs_of_sec(sec);
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117 rel = sec->int_relocs;
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118 printf("Location Type Symbol relative to\n");
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119 for (m = 0; m < sec->nreloc; m++, rel++)
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120 printf("%08X %-8s %s\n", rel->location, rel->typestr,
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121 rel->sym->name);
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122 putchar('\n');
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123 }
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124 exit(0);
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125 }