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[binutils.git] / gold / incremental-dump.cc
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1 // incremental.cc -- incremental linking test/debug tool
3 // Copyright 2009, 2010 Free Software Foundation, Inc.
4 // Written by Rafael Avila de Espindola <rafael.espindola@gmail.com>
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
24 // This file is a (still incomplete) test/debug tool that should display
25 // all information available in the incremental linking sections in a
26 // format that is easy to read.
27 // Once the format is a bit more stable, this should probably be moved to
28 // readelf. Because of that, the use of gold's data structures and functions
29 // is just a short term convenience and not a design decision.
31 #include "gold.h"
33 #include <stdio.h>
34 #include <errno.h>
35 #include <time.h>
37 #include "incremental.h"
39 namespace gold
41 class Output_file;
44 using namespace gold;
46 template<int size, bool big_endian>
47 static typename Incremental_inputs_reader<size, big_endian>::
48 Incremental_input_entry_reader
49 find_input_containing_global(
50 Incremental_inputs_reader<size, big_endian>& incremental_inputs,
51 unsigned int offset,
52 unsigned int* symndx)
54 typedef Incremental_inputs_reader<size, big_endian> Inputs_reader;
55 for (unsigned int i = 0; i < incremental_inputs.input_file_count(); ++i)
57 typename Inputs_reader::Incremental_input_entry_reader input_file =
58 incremental_inputs.input_file(i);
59 if (input_file.type() != INCREMENTAL_INPUT_OBJECT
60 && input_file.type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER)
61 continue;
62 unsigned int nsyms = input_file.get_global_symbol_count();
63 if (offset >= input_file.get_symbol_offset(0)
64 && offset < input_file.get_symbol_offset(nsyms))
66 *symndx = (offset - input_file.get_symbol_offset(0)) / 16;
67 return input_file;
70 gold_unreachable();
73 template<int size, bool big_endian>
74 static void
75 dump_incremental_inputs(const char* argv0, const char* filename,
76 Incremental_binary* inc)
78 bool t;
79 unsigned int inputs_shndx;
80 unsigned int isymtab_shndx;
81 unsigned int irelocs_shndx;
82 unsigned int igot_plt_shndx;
83 unsigned int istrtab_shndx;
84 typedef Incremental_binary::Location Location;
85 typedef Incremental_binary::View View;
86 typedef Incremental_inputs_reader<size, big_endian> Inputs_reader;
87 typedef typename Inputs_reader::Incremental_input_entry_reader Entry_reader;
89 // Find the .gnu_incremental_inputs, _symtab, _relocs, and _strtab sections.
91 t = inc->find_incremental_inputs_sections(&inputs_shndx, &isymtab_shndx,
92 &irelocs_shndx, &igot_plt_shndx,
93 &istrtab_shndx);
94 if (!t)
96 fprintf(stderr, "%s: %s: no .gnu_incremental_inputs section\n", argv0,
97 filename);
98 exit(1);
101 elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file(inc);
103 // Get a view of the .gnu_incremental_inputs section.
105 Location inputs_location(elf_file.section_contents(inputs_shndx));
106 View inputs_view(inc->view(inputs_location));
108 // Get the .gnu_incremental_strtab section as a string table.
110 Location istrtab_location(elf_file.section_contents(istrtab_shndx));
111 View istrtab_view(inc->view(istrtab_location));
112 elfcpp::Elf_strtab istrtab(istrtab_view.data(), istrtab_location.data_size);
114 // Create a reader object for the .gnu_incremental_inputs section.
116 Incremental_inputs_reader<size, big_endian>
117 incremental_inputs(inputs_view.data(), istrtab);
119 if (incremental_inputs.version() != 1)
121 fprintf(stderr, "%s: %s: unknown incremental version %d\n", argv0,
122 filename, incremental_inputs.version());
123 exit(1);
126 const char* command_line = incremental_inputs.command_line();
127 if (command_line == NULL)
129 fprintf(stderr,
130 "%s: %s: failed to get link command line\n",
131 argv0, filename);
132 exit(1);
134 printf("Link command line: %s\n", command_line);
136 printf("\nInput files:\n");
137 for (unsigned int i = 0; i < incremental_inputs.input_file_count(); ++i)
139 Entry_reader input_file = incremental_inputs.input_file(i);
141 const char* objname = input_file.filename();
142 if (objname == NULL)
144 fprintf(stderr,"%s: %s: failed to get file name for object %u\n",
145 argv0, filename, i);
146 exit(1);
148 printf("[%d] %s\n", i, objname);
150 Timespec mtime = input_file.get_mtime();
151 printf(" Timestamp: %llu.%09d %s",
152 static_cast<unsigned long long>(mtime.seconds),
153 mtime.nanoseconds,
154 ctime(&mtime.seconds));
156 Incremental_input_type input_type = input_file.type();
157 printf(" Type: ");
158 switch (input_type)
160 case INCREMENTAL_INPUT_OBJECT:
162 printf("Object\n");
163 printf(" Input section count: %d\n",
164 input_file.get_input_section_count());
165 printf(" Symbol count: %d\n",
166 input_file.get_global_symbol_count());
168 break;
169 case INCREMENTAL_INPUT_ARCHIVE_MEMBER:
171 printf("Archive member\n");
172 printf(" Input section count: %d\n",
173 input_file.get_input_section_count());
174 printf(" Symbol count: %d\n",
175 input_file.get_global_symbol_count());
177 break;
178 case INCREMENTAL_INPUT_ARCHIVE:
180 printf("Archive\n");
181 printf(" Member count: %d\n", input_file.get_member_count());
182 printf(" Unused symbol count: %d\n",
183 input_file.get_unused_symbol_count());
185 break;
186 case INCREMENTAL_INPUT_SHARED_LIBRARY:
188 printf("Shared library\n");
189 printf(" Symbol count: %d\n",
190 input_file.get_global_symbol_count());
192 break;
193 case INCREMENTAL_INPUT_SCRIPT:
194 printf("Linker script\n");
195 break;
196 default:
197 fprintf(stderr, "%s: invalid file type for object %u: %d\n",
198 argv0, i, input_type);
199 exit(1);
203 printf("\nInput sections:\n");
204 for (unsigned int i = 0; i < incremental_inputs.input_file_count(); ++i)
206 Entry_reader input_file(incremental_inputs.input_file(i));
208 if (input_file.type() != INCREMENTAL_INPUT_OBJECT
209 && input_file.type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER)
210 continue;
212 const char* objname = input_file.filename();
213 if (objname == NULL)
215 fprintf(stderr,"%s: %s: failed to get file name for object %u\n",
216 argv0, filename, i);
217 exit(1);
220 printf("[%d] %s\n", i, objname);
222 printf(" %3s %6s %8s %8s %s\n",
223 "n", "outndx", "offset", "size", "name");
224 unsigned int nsections = input_file.get_input_section_count();
225 for (unsigned int shndx = 0; shndx < nsections; ++shndx)
227 typename Entry_reader::Input_section_info info(
228 input_file.get_input_section(shndx));
229 printf(" %3d %6d %8lld %8lld %s\n", shndx,
230 info.output_shndx,
231 static_cast<long long>(info.sh_offset),
232 static_cast<long long>(info.sh_size),
233 info.name);
237 printf("\nGlobal symbols per input file:\n");
238 for (unsigned int i = 0; i < incremental_inputs.input_file_count(); ++i)
240 Entry_reader input_file(incremental_inputs.input_file(i));
242 if (input_file.type() != INCREMENTAL_INPUT_OBJECT
243 && input_file.type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER)
244 continue;
246 const char* objname = input_file.filename();
247 if (objname == NULL)
249 fprintf(stderr,"%s: %s: failed to get file name for object %u\n",
250 argv0, filename, i);
251 exit(1);
254 printf("[%d] %s\n", i, objname);
256 unsigned int nsyms = input_file.get_global_symbol_count();
257 if (nsyms > 0)
258 printf(" %6s %8s %8s %8s %8s\n",
259 "outndx", "offset", "chain", "#relocs", "rbase");
260 for (unsigned int symndx = 0; symndx < nsyms; ++symndx)
262 typename Entry_reader::Global_symbol_info info(
263 input_file.get_global_symbol_info(symndx));
264 printf(" %6d %8d %8d %8d %8d\n",
265 info.output_symndx,
266 input_file.get_symbol_offset(symndx),
267 info.next_offset,
268 info.reloc_count,
269 info.reloc_offset);
273 // Get a view of the .symtab section.
275 unsigned int symtab_shndx = elf_file.find_section_by_type(elfcpp::SHT_SYMTAB);
276 if (symtab_shndx == elfcpp::SHN_UNDEF) // Not found.
278 fprintf(stderr, "%s: %s: no symbol table section\n", argv0, filename);
279 exit(1);
281 Location symtab_location(elf_file.section_contents(symtab_shndx));
282 View symtab_view(inc->view(symtab_location));
284 // Get a view of the .strtab section.
286 unsigned int strtab_shndx = elf_file.section_link(symtab_shndx);
287 if (strtab_shndx == elfcpp::SHN_UNDEF
288 || strtab_shndx > elf_file.shnum()
289 || elf_file.section_type(strtab_shndx) != elfcpp::SHT_STRTAB)
291 fprintf(stderr, "%s: %s: no string table section\n", argv0, filename);
292 exit(1);
294 Location strtab_location(elf_file.section_contents(strtab_shndx));
295 View strtab_view(inc->view(strtab_location));
296 elfcpp::Elf_strtab strtab(strtab_view.data(), strtab_location.data_size);
298 // Get a view of the .gnu_incremental_symtab section.
300 Location isymtab_location(elf_file.section_contents(isymtab_shndx));
301 View isymtab_view(inc->view(isymtab_location));
303 // Get a view of the .gnu_incremental_relocs section.
305 Location irelocs_location(elf_file.section_contents(irelocs_shndx));
306 View irelocs_view(inc->view(irelocs_location));
308 // The .gnu_incremental_symtab section contains entries that parallel
309 // the global symbols of the main symbol table. The sh_info field
310 // of the main symbol table's section header tells us how many global
311 // symbols there are, but that count does not include any global
312 // symbols that were forced local during the link. Therefore, we
313 // use the size of the .gnu_incremental_symtab section to deduce
314 // the number of global symbols + forced-local symbols there are
315 // in the symbol table.
316 unsigned int sym_size = elfcpp::Elf_sizes<size>::sym_size;
317 unsigned int nsyms = symtab_location.data_size / sym_size;
318 unsigned int nglobals = isymtab_location.data_size / 4;
319 unsigned int first_global = nsyms - nglobals;
320 unsigned const char* sym_p = symtab_view.data() + first_global * sym_size;
321 unsigned const char* isym_p = isymtab_view.data();
323 Incremental_symtab_reader<big_endian> isymtab(isymtab_view.data());
324 Incremental_relocs_reader<size, big_endian> irelocs(irelocs_view.data());
326 printf("\nGlobal symbol table:\n");
327 for (unsigned int i = 0; i < nglobals; i++)
329 elfcpp::Sym<size, big_endian> sym(sym_p);
330 const char* symname;
331 if (!strtab.get_c_string(sym.get_st_name(), &symname))
332 symname = "<unknown>";
333 printf("[%d] %s\n", first_global + i, symname);
334 unsigned int offset = isymtab.get_list_head(i);
335 while (offset > 0)
337 unsigned int sym_ndx;
338 Entry_reader input_file =
339 find_input_containing_global<size, big_endian>(incremental_inputs,
340 offset, &sym_ndx);
341 typename Entry_reader::Global_symbol_info sym_info(
342 input_file.get_global_symbol_info(sym_ndx));
343 printf(" %s (first reloc: %d, reloc count: %d)",
344 input_file.filename(), sym_info.reloc_offset,
345 sym_info.reloc_count);
346 if (sym_info.output_symndx != first_global + i)
347 printf(" ** wrong output symndx (%d) **", sym_info.output_symndx);
348 printf("\n");
349 // Dump the relocations from this input file for this symbol.
350 unsigned int r_off = sym_info.reloc_offset;
351 for (unsigned int j = 0; j < sym_info.reloc_count; j++)
353 printf(" %4d relocation type %3d shndx %d"
354 " offset %016llx addend %016llx %s\n",
355 r_off,
356 irelocs.get_r_type(r_off),
357 irelocs.get_r_shndx(r_off),
358 static_cast<long long>(irelocs.get_r_offset(r_off)),
359 static_cast<long long>(irelocs.get_r_addend(r_off)),
360 symname);
361 r_off += irelocs.reloc_size;
363 offset = sym_info.next_offset;
365 sym_p += sym_size;
366 isym_p += 4;
369 // Get a view of the .gnu_incremental_got_plt section.
371 Location igot_plt_location(elf_file.section_contents(igot_plt_shndx));
372 View igot_plt_view(inc->view(igot_plt_location));
374 Incremental_got_plt_reader<big_endian> igot_plt(igot_plt_view.data());
375 unsigned int ngot = igot_plt.get_got_entry_count();
376 unsigned int nplt = igot_plt.get_plt_entry_count();
378 printf("\nGOT entries:\n");
379 for (unsigned int i = 0; i < ngot; ++i)
381 unsigned int got_type = igot_plt.get_got_type(i);
382 unsigned int got_desc = igot_plt.get_got_desc(i);
383 printf("[%d] type %02x, ", i, got_type & 0x7f);
384 if (got_type == 0x7f)
385 printf("reserved");
386 else if (got_type & 0x80)
388 Entry_reader input_file = incremental_inputs.input_file(got_desc);
389 const char* objname = input_file.filename();
390 printf("local: %s (%d)", objname, got_desc);
392 else
394 sym_p = symtab_view.data() + got_desc * sym_size;
395 elfcpp::Sym<size, big_endian> sym(sym_p);
396 const char* symname;
397 if (!strtab.get_c_string(sym.get_st_name(), &symname))
398 symname = "<unknown>";
399 printf("global %s (%d)", symname, got_desc);
401 printf("\n");
404 printf("\nPLT entries:\n");
405 for (unsigned int i = 0; i < nplt; ++i)
407 unsigned int plt_desc = igot_plt.get_plt_desc(i);
408 printf("[%d] ", i);
409 sym_p = symtab_view.data() + plt_desc * sym_size;
410 elfcpp::Sym<size, big_endian> sym(sym_p);
411 const char* symname;
412 if (!strtab.get_c_string(sym.get_st_name(), &symname))
413 symname = "<unknown>";
414 printf("%s (%d)\n", symname, plt_desc);
417 printf("\nUnused archive symbols:\n");
418 for (unsigned int i = 0; i < incremental_inputs.input_file_count(); ++i)
420 Entry_reader input_file(incremental_inputs.input_file(i));
422 if (input_file.type() != INCREMENTAL_INPUT_ARCHIVE)
423 continue;
425 const char* objname = input_file.filename();
426 if (objname == NULL)
428 fprintf(stderr,"%s: %s: failed to get file name for object %u\n",
429 argv0, filename, i);
430 exit(1);
433 printf("[%d] %s\n", i, objname);
434 unsigned int nsyms = input_file.get_unused_symbol_count();
435 for (unsigned int symndx = 0; symndx < nsyms; ++symndx)
436 printf(" %s\n", input_file.get_unused_symbol(symndx));
442 main(int argc, char** argv)
444 if (argc != 2)
446 fprintf(stderr, "Usage: %s <file>\n", argv[0]);
447 return 1;
449 const char* filename = argv[1];
451 Output_file* file = new Output_file(filename);
453 bool t = file->open_for_modification();
454 if (!t)
456 fprintf(stderr, "%s: open_for_modification(%s): %s\n", argv[0], filename,
457 strerror(errno));
458 return 1;
461 Incremental_binary* inc = open_incremental_binary(file);
463 if (inc == NULL)
465 fprintf(stderr, "%s: open_incremental_binary(%s): %s\n", argv[0],
466 filename, strerror(errno));
467 return 1;
470 switch (parameters->size_and_endianness())
472 #ifdef HAVE_TARGET_32_LITTLE
473 case Parameters::TARGET_32_LITTLE:
474 dump_incremental_inputs<32, false>(argv[0], filename, inc);
475 break;
476 #endif
477 #ifdef HAVE_TARGET_32_BIG
478 case Parameters::TARGET_32_BIG:
479 dump_incremental_inputs<32, true>(argv[0], filename, inc);
480 break;
481 #endif
482 #ifdef HAVE_TARGET_64_LITTLE
483 case Parameters::TARGET_64_LITTLE:
484 dump_incremental_inputs<64, false>(argv[0], filename, inc);
485 break;
486 #endif
487 #ifdef HAVE_TARGET_64_BIG
488 case Parameters::TARGET_64_BIG:
489 dump_incremental_inputs<64, true>(argv[0], filename, inc);
490 break;
491 #endif
492 default:
493 gold_unreachable();
496 return 0;