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annotate objgrep/tables.c @ 390:37ee46a0dde7

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compal/sym-fw-disasm: some study of buz.obj code
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 01 Apr 2022 04:30:44 +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 * This C module contains functions for the initial parsing
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3 * of the section and symbol tables.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.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 "filestruct.h"
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12 #include "intstruct.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 initial_parse_hdr()
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18 {
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19 unsigned symtab_offset;
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20
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21 filehdr_struct = (struct external_filehdr *) objfilemap;
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22 if (get_u16(filehdr_struct->f_magic) != 0xC2) {
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23 fprintf(stderr, "error: %s is not a TI COFF2 object\n",
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24 objfilename);
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25 exit(2);
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26 }
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27 if (get_u16(filehdr_struct->f_target_id) != 0x97) {
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28 fprintf(stderr, "error: TI COFF object %s is not for TMS470\n",
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29 objfilename);
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30 exit(2);
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31 }
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32 if (get_u16(filehdr_struct->f_opthdr)) {
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33 fprintf(stderr,
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34 "error: %s has the \"optional\" header present\n",
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35 objfilename);
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36 exit(2);
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37 }
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38 sections_raw = (struct external_scnhdr *)
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39 (objfilemap + sizeof(struct external_filehdr));
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40 nsections = get_u16(filehdr_struct->f_nscns);
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41 symtab_offset = get_u32(filehdr_struct->f_symptr);
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42 symtab_raw = (struct external_syment *)(objfilemap + symtab_offset);
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43 nsymtab = get_u32(filehdr_struct->f_nsyms);
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44 strtab_offset = symtab_offset +
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45 sizeof(struct external_syment) * nsymtab;
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46 }
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47
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48 static char *
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49 get_secorsym_name(ptr)
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50 u_char *ptr;
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51 {
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52 char *alloc;
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53
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54 if (ptr[0]) {
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55 if (ptr[7]) {
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56 alloc = malloc(9);
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57 if (!alloc) {
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58 perror("malloc");
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59 exit(2);
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60 }
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61 bcopy(ptr, alloc, 8);
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62 alloc[8] = '\0';
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63 return(alloc);
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64 } else
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65 return((char *) ptr);
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66 }
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67 if (ptr[1] || ptr[2] || ptr[3]) {
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68 fprintf(stderr, "error: malformed name in %s at offset 0x%x\n",
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69 objfilename, ptr - objfilemap);
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70 exit(2);
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71 }
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72 return(objfilemap + strtab_offset + get_u32(ptr+4));
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73 }
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74
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75 get_int_section_table()
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76 {
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77 unsigned n;
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78
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79 sections = malloc(sizeof(struct internal_scnhdr) * nsections);
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80 if (!sections) {
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81 perror("malloc");
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82 exit(2);
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83 }
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84 for (n = 0; n < nsections; n++) {
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85 sections[n].name = get_secorsym_name(sections_raw[n].s_name);
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86 if (get_u32(sections_raw[n].s_paddr))
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87 fprintf(stderr,
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88 "warning: section #%u (%s) has nonzero paddr\n",
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89 n, sections[n].name);
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90 if (get_u32(sections_raw[n].s_vaddr))
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91 fprintf(stderr,
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92 "warning: section #%u (%s) has nonzero vaddr\n",
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93 n, sections[n].name);
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94 sections[n].size = get_u32(sections_raw[n].s_size);
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95 sections[n].data_offset = get_u32(sections_raw[n].s_scnptr);
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96 sections[n].reloc_offset = get_u32(sections_raw[n].s_relptr);
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97 sections[n].line_offset = get_u32(sections_raw[n].s_lnnoptr);
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98 sections[n].nreloc = get_u32(sections_raw[n].s_nreloc);
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99 sections[n].nlineent = get_u32(sections_raw[n].s_nlnno);
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100 sections[n].flags = get_u32(sections_raw[n].s_flags);
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101 if (get_u16(sections_raw[n].s_reserved))
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102 fprintf(stderr,
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103 "warning: section #%u (%s): some nonzero value in s_reserved bytes\n",
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104 n, sections[n].name);
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105 if (get_u16(sections_raw[n].s_page))
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106 fprintf(stderr,
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107 "warning: section #%u (%s): some nonzero value in s_page bytes\n",
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108 n, sections[n].name);
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109 sections[n].nsymbols = 0;
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110 sections[n].recov_flag = 0;
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111 }
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112 }
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113
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114 get_int_symbol_table()
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115 {
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116 unsigned n;
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117 struct internal_syment *in;
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118
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119 symtab = malloc(sizeof(struct internal_syment *) * nsymtab);
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120 if (!symtab) {
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121 perror("malloc");
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122 exit(2);
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123 }
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124 for (n = 0; n < nsymtab; ) {
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125 in = malloc(sizeof(struct internal_syment));
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126 if (!in) {
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127 perror("malloc");
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128 exit(2);
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129 }
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130 symtab[n] = in;
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131 in->number = n;
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132 in->name = get_secorsym_name(symtab_raw[n].e_name);
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
133 in->value = get_u32(symtab_raw[n].e_value);
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
134 in->scnum = get_s16(symtab_raw[n].e_scnum);
80
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
135 if (in->scnum > 0) {
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
136 if (in->scnum > nsections) {
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
137 fprintf(stderr,
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
138 "symtab entry #%u: scnum too big\n", n);
167
c25367bb7656 objgrep: written, compiles
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 144
diff changeset
139 exit(2);
80
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
140 }
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
141 in->section = sections + in->scnum - 1;
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
142 in->section->nsymbols++;
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
143 } else if (in->scnum < -2) {
73
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
144 fprintf(stderr,
80
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
145 "symtab entry #%u: scnum < -2\n", n);
167
c25367bb7656 objgrep: written, compiles
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 144
diff changeset
146 exit(2);
80
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
147 } else
da103b9377e3 tiobjd: preparation for symbol sorting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 75
diff changeset
148 in->section = 0;
73
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
149 in->type = get_u16(symtab_raw[n].e_type);
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
150 in->class = symtab_raw[n].e_sclass;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
151 switch (symtab_raw[n++].e_numaux) {
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
152 case 0:
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
153 in->aux = 0;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
154 continue;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
155 case 1:
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
156 if (n >= nsymtab) {
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
157 fprintf(stderr,
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
158 "error: last symbol's aux spills over\n");
167
c25367bb7656 objgrep: written, compiles
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 144
diff changeset
159 exit(2);
73
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
160 }
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
161 symtab[n] = 0;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
162 in->aux = (u_char *)(symtab_raw + n);
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
163 n++;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
164 continue;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
165 default:
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
166 n--;
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
167 fprintf(stderr, "symtab entry #%u: invalid numaux\n",
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
168 n);
167
c25367bb7656 objgrep: written, compiles
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 144
diff changeset
169 exit(2);
73
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
170 }
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
171 }
10f3fbff5e97 tiobjd: symbol table parsing implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 71
diff changeset
172 }