ld: Add publics stream to PDB files
This commit is contained in:
Mark Harmstone
Alan Modra
parent
a726722240
commit
0882710510
347
ld/pdb.c
347
ld/pdb.c
@ -383,10 +383,31 @@ get_arch_number (bfd *abfd)
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return IMAGE_FILE_MACHINE_I386;
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}
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/* Return the index of a given output section. */
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static uint16_t
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find_section_number (bfd *abfd, asection *sect)
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{
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uint16_t i = 1;
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for (asection *s = abfd->sections; s; s = s->next)
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{
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if (s == sect)
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return i;
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/* Empty sections aren't output. */
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if (s->size != 0)
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i++;
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}
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return 0;
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}
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/* Stream 4 is the debug information (DBI) stream. */
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static bool
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populate_dbi_stream (bfd *stream, bfd *abfd,
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uint16_t section_header_stream_num)
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uint16_t section_header_stream_num,
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uint16_t sym_rec_stream_num,
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uint16_t publics_stream_num)
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{
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struct pdb_dbi_stream_header h;
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struct optional_dbg_header opt;
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@ -396,9 +417,9 @@ populate_dbi_stream (bfd *stream, bfd *abfd,
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bfd_putl32 (1, &h.age);
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bfd_putl16 (0xffff, &h.global_stream_index);
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bfd_putl16 (0x8e1d, &h.build_number); // MSVC 14.29
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bfd_putl16 (0xffff, &h.public_stream_index);
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bfd_putl16 (publics_stream_num, &h.public_stream_index);
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bfd_putl16 (0, &h.pdb_dll_version);
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bfd_putl16 (0xffff, &h.sym_record_stream);
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bfd_putl16 (sym_rec_stream_num, &h.sym_record_stream);
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bfd_putl16 (0, &h.pdb_dll_rbld);
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bfd_putl32 (0, &h.mod_info_size);
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bfd_putl32 (0, &h.section_contribution_size);
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@ -433,6 +454,293 @@ populate_dbi_stream (bfd *stream, bfd *abfd,
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return true;
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}
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/* Used as parameter to qsort, to sort publics by hash. */
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static int
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public_compare_hash (const void *s1, const void *s2)
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{
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const struct public *p1 = *(const struct public **) s1;
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const struct public *p2 = *(const struct public **) s2;
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if (p1->hash < p2->hash)
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return -1;
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if (p1->hash > p2->hash)
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return 1;
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return 0;
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}
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/* Used as parameter to qsort, to sort publics by address. */
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static int
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public_compare_addr (const void *s1, const void *s2)
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{
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const struct public *p1 = *(const struct public **) s1;
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const struct public *p2 = *(const struct public **) s2;
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if (p1->section < p2->section)
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return -1;
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if (p1->section > p2->section)
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return 1;
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if (p1->address < p2->address)
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return -1;
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if (p1->address > p2->address)
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return 1;
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return 0;
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}
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/* The publics stream is a hash map of S_PUB32 records, which are stored
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in the symbol record stream. Each S_PUB32 entry represents a symbol
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from the point of view of the linker: a section index, an offset within
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the section, and a mangled name. Compare with S_GDATA32 and S_GPROC32,
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which are the same thing but generated by the compiler. */
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static bool
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populate_publics_stream (bfd *stream, bfd *abfd, bfd *sym_rec_stream)
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{
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struct publics_header header;
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struct globals_hash_header hash_header;
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const unsigned int num_buckets = 4096;
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unsigned int num_entries = 0, filled_buckets = 0;
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unsigned int buckets_size, sym_hash_size;
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char int_buf[sizeof (uint32_t)];
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struct public *publics_head = NULL, *publics_tail = NULL;
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struct public **buckets;
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struct public **sorted = NULL;
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bool ret = false;
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buckets = xmalloc (sizeof (struct public *) * num_buckets);
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memset (buckets, 0, sizeof (struct public *) * num_buckets);
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/* Loop through the global symbols in our input files, and write S_PUB32
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records in the symbol record stream for those that make it into the
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final image. */
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for (bfd *in = coff_data (abfd)->link_info->input_bfds; in;
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in = in->link.next)
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{
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for (unsigned int i = 0; i < in->symcount; i++)
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{
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struct bfd_symbol *sym = in->outsymbols[i];
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if (sym->flags & BSF_GLOBAL)
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{
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struct pubsym ps;
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uint16_t record_length;
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const char *name = sym->name;
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size_t name_len = strlen (name);
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struct public *p = xmalloc (sizeof (struct public));
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unsigned int padding = 0;
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uint16_t section;
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uint32_t flags = 0;
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section =
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find_section_number (abfd, sym->section->output_section);
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if (section == 0)
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continue;
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p->next = NULL;
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p->offset = bfd_tell (sym_rec_stream);
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p->hash = calc_hash (name, name_len) % num_buckets;
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p->section = section;
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p->address = sym->section->output_offset + sym->value;
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record_length = sizeof (struct pubsym) + name_len + 1;
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if (record_length % 4)
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padding = 4 - (record_length % 4);
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/* Assume that all global symbols in executable sections
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are functions. */
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if (sym->section->flags & SEC_CODE)
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flags = PUBSYM_FUNCTION;
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bfd_putl16 (record_length + padding - sizeof (uint16_t),
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&ps.record_length);
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bfd_putl16 (S_PUB32, &ps.record_type);
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bfd_putl32 (flags, &ps.flags);
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bfd_putl32 (p->address, &ps.offset);
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bfd_putl16 (p->section, &ps.section);
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if (bfd_bwrite (&ps, sizeof (struct pubsym), sym_rec_stream) !=
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sizeof (struct pubsym))
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goto end;
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if (bfd_bwrite (name, name_len + 1, sym_rec_stream) !=
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name_len + 1)
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goto end;
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for (unsigned int j = 0; j < padding; j++)
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{
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uint8_t b = 0;
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if (bfd_bwrite (&b, sizeof (uint8_t), sym_rec_stream) !=
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sizeof (uint8_t))
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goto end;
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}
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if (!publics_head)
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publics_head = p;
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else
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publics_tail->next = p;
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publics_tail = p;
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num_entries++;
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}
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}
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}
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if (num_entries > 0)
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{
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/* Create an array of pointers, sorted by hash value. */
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sorted = xmalloc (sizeof (struct public *) * num_entries);
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struct public *p = publics_head;
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for (unsigned int i = 0; i < num_entries; i++)
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{
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sorted[i] = p;
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p = p->next;
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}
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qsort (sorted, num_entries, sizeof (struct public *),
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public_compare_hash);
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/* Populate the buckets. */
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for (unsigned int i = 0; i < num_entries; i++)
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{
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if (!buckets[sorted[i]->hash])
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{
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buckets[sorted[i]->hash] = sorted[i];
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filled_buckets++;
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}
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sorted[i]->index = i;
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}
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}
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buckets_size = num_buckets / 8;
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buckets_size += sizeof (uint32_t);
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buckets_size += filled_buckets * sizeof (uint32_t);
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sym_hash_size = sizeof (hash_header);
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sym_hash_size += num_entries * sizeof (struct hash_record);
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sym_hash_size += buckets_size;
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/* Output the publics header. */
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bfd_putl32 (sym_hash_size, &header.sym_hash_size);
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bfd_putl32 (num_entries * sizeof (uint32_t), &header.addr_map_size);
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bfd_putl32 (0, &header.num_thunks);
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bfd_putl32 (0, &header.thunks_size);
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bfd_putl32 (0, &header.thunk_table);
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bfd_putl32 (0, &header.thunk_table_offset);
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bfd_putl32 (0, &header.num_sects);
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if (bfd_bwrite (&header, sizeof (header), stream) != sizeof (header))
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goto end;
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/* Output the global hash header. */
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bfd_putl32 (GLOBALS_HASH_SIGNATURE, &hash_header.signature);
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bfd_putl32 (GLOBALS_HASH_VERSION_70, &hash_header.version);
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bfd_putl32 (num_entries * sizeof (struct hash_record),
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&hash_header.entries_size);
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bfd_putl32 (buckets_size, &hash_header.buckets_size);
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if (bfd_bwrite (&hash_header, sizeof (hash_header), stream) !=
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sizeof (hash_header))
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goto end;
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/* Write the entries in hash order. */
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for (unsigned int i = 0; i < num_entries; i++)
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{
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struct hash_record hr;
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bfd_putl32 (sorted[i]->offset + 1, &hr.offset);
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bfd_putl32 (1, &hr.reference);
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if (bfd_bwrite (&hr, sizeof (hr), stream) != sizeof (hr))
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goto end;
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}
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/* Write the bitmap for filled and unfilled buckets. */
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for (unsigned int i = 0; i < num_buckets; i += 8)
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{
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uint8_t v = 0;
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for (unsigned int j = 0; j < 8; j++)
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{
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if (buckets[i + j])
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v |= 1 << j;
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}
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if (bfd_bwrite (&v, sizeof (v), stream) != sizeof (v))
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goto end;
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}
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/* Add a 4-byte gap. */
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bfd_putl32 (0, int_buf);
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if (bfd_bwrite (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
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goto end;
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/* Write the bucket offsets. */
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for (unsigned int i = 0; i < num_buckets; i++)
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{
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if (buckets[i])
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{
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/* 0xc is size of internal hash_record structure in
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Microsoft's parser. */
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bfd_putl32 (buckets[i]->index * 0xc, int_buf);
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if (bfd_bwrite (int_buf, sizeof (uint32_t), stream) !=
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sizeof (uint32_t))
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goto end;
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}
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}
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/* Write the address map: offsets into the symbol record stream of
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S_PUB32 records, ordered by address. */
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if (num_entries > 0)
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{
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qsort (sorted, num_entries, sizeof (struct public *),
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public_compare_addr);
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for (unsigned int i = 0; i < num_entries; i++)
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{
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bfd_putl32 (sorted[i]->offset, int_buf);
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if (bfd_bwrite (int_buf, sizeof (uint32_t), stream) !=
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sizeof (uint32_t))
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goto end;
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}
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}
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ret = true;
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end:
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free (buckets);
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while (publics_head)
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{
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struct public *p = publics_head->next;
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free (publics_head);
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publics_head = p;
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}
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free (sorted);
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return ret;
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}
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/* The section header stream contains a copy of the section headers
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from the PE file, in the same format. */
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static bool
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@ -494,8 +802,9 @@ create_pdb_file (bfd *abfd, const char *pdb_name, const unsigned char *guid)
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{
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bfd *pdb;
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bool ret = false;
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bfd *info_stream, *dbi_stream, *names_stream;
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uint16_t section_header_stream_num;
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bfd *info_stream, *dbi_stream, *names_stream, *sym_rec_stream,
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*publics_stream;
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uint16_t section_header_stream_num, sym_rec_stream_num, publics_stream_num;
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pdb = bfd_openw (pdb_name, "pdb");
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if (!pdb)
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@ -554,6 +863,24 @@ create_pdb_file (bfd *abfd, const char *pdb_name, const unsigned char *guid)
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goto end;
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}
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sym_rec_stream = add_stream (pdb, NULL, &sym_rec_stream_num);
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if (!sym_rec_stream)
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{
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einfo (_("%P: warning: cannot create symbol record stream "
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"in PDB file: %E\n"));
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goto end;
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}
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publics_stream = add_stream (pdb, NULL, &publics_stream_num);
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if (!publics_stream)
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{
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einfo (_("%P: warning: cannot create publics stream "
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"in PDB file: %E\n"));
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goto end;
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}
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if (!create_section_header_stream (pdb, abfd, §ion_header_stream_num))
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{
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einfo (_("%P: warning: cannot create section header stream "
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@ -561,13 +888,21 @@ create_pdb_file (bfd *abfd, const char *pdb_name, const unsigned char *guid)
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goto end;
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}
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if (!populate_dbi_stream (dbi_stream, abfd, section_header_stream_num))
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if (!populate_dbi_stream (dbi_stream, abfd, section_header_stream_num,
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sym_rec_stream_num, publics_stream_num))
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{
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einfo (_("%P: warning: cannot populate DBI stream "
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"in PDB file: %E\n"));
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goto end;
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}
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if (!populate_publics_stream (publics_stream, abfd, sym_rec_stream))
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{
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einfo (_("%P: warning: cannot populate publics stream "
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"in PDB file: %E\n"));
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goto end;
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}
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if (!populate_info_stream (pdb, info_stream, guid))
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{
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einfo (_("%P: warning: cannot populate info stream "
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47
ld/pdb.h
47
ld/pdb.h
@ -28,6 +28,8 @@
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#include "bfd.h"
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#include <stdbool.h>
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#define S_PUB32 0x110e
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/* PDBStream70 in pdb1.h */
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struct pdb_stream_70
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{
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@ -91,6 +93,51 @@ struct pdb_dbi_stream_header
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#define DBI_STREAM_VERSION_70 19990903
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/* PSGSIHDR in gsi.h */
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struct publics_header
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{
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uint32_t sym_hash_size;
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uint32_t addr_map_size;
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uint32_t num_thunks;
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uint32_t thunks_size;
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uint32_t thunk_table;
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uint32_t thunk_table_offset;
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uint32_t num_sects;
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};
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/* GSIHashHdr in gsi.h */
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struct globals_hash_header
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{
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uint32_t signature;
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uint32_t version;
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uint32_t entries_size;
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uint32_t buckets_size;
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};
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/* HRFile in gsi.h */
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struct hash_record
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{
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uint32_t offset;
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uint32_t reference;
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};
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#define GLOBALS_HASH_SIGNATURE 0xffffffff
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#define GLOBALS_HASH_VERSION_70 0xf12f091a
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/* PUBSYM32 in cvinfo.h */
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struct pubsym
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{
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uint16_t record_length;
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uint16_t record_type;
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uint32_t flags;
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uint32_t offset;
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uint16_t section;
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/* followed by null-terminated string */
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} ATTRIBUTE_PACKED;
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/* see bitset CV_PUBSYMFLAGS in cvinfo.h */
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#define PUBSYM_FUNCTION 0x2
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struct optional_dbg_header
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{
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uint16_t fpo_stream;
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@ -395,12 +395,111 @@ proc check_section_stream { img pdb } {
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return 1
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}
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proc get_publics_stream_index { pdb } {
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global ar
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set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb 0003"]
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if ![string match "" $exec_output] {
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return -1
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}
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set fi [open tmpdir/0003]
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fconfigure $fi -translation binary
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# skip fields
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seek $fi 16
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# read substream sizes
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set data [read $fi 2]
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binary scan $data s index
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close $fi
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return $index
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}
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proc get_sym_record_stream_index { pdb } {
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global ar
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|
||||
set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb 0003"]
|
||||
|
||||
if ![string match "" $exec_output] {
|
||||
return -1
|
||||
}
|
||||
|
||||
set fi [open tmpdir/0003]
|
||||
fconfigure $fi -translation binary
|
||||
|
||||
# skip fields
|
||||
seek $fi 20
|
||||
|
||||
# read substream sizes
|
||||
|
||||
set data [read $fi 2]
|
||||
binary scan $data s index
|
||||
|
||||
close $fi
|
||||
|
||||
return $index
|
||||
}
|
||||
|
||||
proc check_publics_stream { pdb } {
|
||||
global ar
|
||||
global objdump
|
||||
global srcdir
|
||||
global subdir
|
||||
|
||||
set publics_index [get_publics_stream_index $pdb]
|
||||
|
||||
if { $publics_index == -1 } {
|
||||
return 0
|
||||
}
|
||||
|
||||
set index_str [format "%04x" $publics_index]
|
||||
|
||||
set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb $index_str"]
|
||||
|
||||
if ![string match "" $exec_output] {
|
||||
return 0
|
||||
}
|
||||
|
||||
set exp [file_contents "$srcdir/$subdir/pdb1-publics.d"]
|
||||
set got [run_host_cmd "$objdump" "-s --target=binary tmpdir/$index_str"]
|
||||
if ![string match $exp $got] {
|
||||
return 0
|
||||
}
|
||||
|
||||
set sym_record_index [get_sym_record_stream_index $pdb]
|
||||
|
||||
if { $sym_record_index == -1 } {
|
||||
return 0
|
||||
}
|
||||
|
||||
set index_str [format "%04x" $sym_record_index]
|
||||
|
||||
set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb $index_str"]
|
||||
|
||||
if ![string match "" $exec_output] {
|
||||
return 0
|
||||
}
|
||||
|
||||
set exp [file_contents "$srcdir/$subdir/pdb1-sym-record.d"]
|
||||
set got [run_host_cmd "$objdump" "-s --target=binary tmpdir/$index_str"]
|
||||
if ![string match $exp $got] {
|
||||
return 0
|
||||
}
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
if ![ld_assemble $as $srcdir/$subdir/pdb1.s tmpdir/pdb1.o] {
|
||||
unsupported "Build pdb1.o"
|
||||
return
|
||||
}
|
||||
|
||||
if ![ld_link $ld "tmpdir/pdb1.exe" "--pdb=tmpdir/pdb1.pdb tmpdir/pdb1.o"] {
|
||||
if ![ld_link $ld "tmpdir/pdb1.exe" "--pdb=tmpdir/pdb1.pdb --gc-sections -e foo tmpdir/pdb1.o"] {
|
||||
fail "Could not create a PE image with a PDB file"
|
||||
return
|
||||
}
|
||||
@ -441,3 +540,9 @@ if [check_section_stream tmpdir/pdb1.exe tmpdir/pdb1.pdb] {
|
||||
} else {
|
||||
fail "Invalid section stream"
|
||||
}
|
||||
|
||||
if [check_publics_stream tmpdir/pdb1.pdb] {
|
||||
pass "Valid publics stream"
|
||||
} else {
|
||||
fail "Invalid publics stream"
|
||||
}
|
||||
|
||||
41
ld/testsuite/ld-pe/pdb1-publics.d
Normal file
41
ld/testsuite/ld-pe/pdb1-publics.d
Normal file
@ -0,0 +1,41 @@
|
||||
|
||||
*: file format binary
|
||||
|
||||
Contents of section .data:
|
||||
0000 2c020000 08000000 00000000 00000000 ,...............
|
||||
0010 00000000 00000000 00000000 ffffffff ................
|
||||
0020 1a092ff1 10000000 0c020000 15000000 ../.............
|
||||
0030 01000000 01000000 01000000 00000000 ................
|
||||
0040 00000000 00000000 00000000 00000000 ................
|
||||
0050 00000000 00000000 00000000 00000000 ................
|
||||
0060 00000000 00000000 00000000 00000000 ................
|
||||
0070 00000000 00000000 00000000 00000000 ................
|
||||
0080 00000000 00000000 00000000 00000000 ................
|
||||
0090 00000000 00000000 00000000 00000000 ................
|
||||
00a0 00000000 00000000 00000000 00000000 ................
|
||||
00b0 00000000 00000000 00000000 00000000 ................
|
||||
00c0 00000000 00000000 00000000 00000000 ................
|
||||
00d0 00000000 00000000 00000000 00000001 ................
|
||||
00e0 00000000 00000000 00000000 00000000 ................
|
||||
00f0 00000000 00000000 00000000 00000000 ................
|
||||
0100 00000000 00000000 00000000 00000000 ................
|
||||
0110 00000000 00000000 00000000 00000000 ................
|
||||
0120 00000000 00000000 00000000 00000000 ................
|
||||
0130 00000000 00000000 00000000 00000000 ................
|
||||
0140 00000000 00000000 00000000 00000000 ................
|
||||
0150 00000000 00000000 00000000 00000000 ................
|
||||
0160 00000000 00000000 00000000 00000000 ................
|
||||
0170 00000000 00000000 00000000 00000000 ................
|
||||
0180 00000000 00000000 00000000 00000000 ................
|
||||
0190 00000000 00000000 00000000 01000000 ................
|
||||
01a0 00000000 00000000 00000000 00000000 ................
|
||||
01b0 00000000 00000000 00000000 00000000 ................
|
||||
01c0 00000000 00000000 00000000 00000000 ................
|
||||
01d0 00000000 00000000 00000000 00000000 ................
|
||||
01e0 00000000 00000000 00000000 00000000 ................
|
||||
01f0 00000000 00000000 00000000 00000000 ................
|
||||
0200 00000000 00000000 00000000 00000000 ................
|
||||
0210 00000000 00000000 00000000 00000000 ................
|
||||
0220 00000000 00000000 00000000 00000000 ................
|
||||
0230 00000000 00000000 00000000 00000000 ................
|
||||
0240 00000000 0c000000 00000000 14000000 ................
|
||||
7
ld/testsuite/ld-pe/pdb1-sym-record.d
Normal file
7
ld/testsuite/ld-pe/pdb1-sym-record.d
Normal file
@ -0,0 +1,7 @@
|
||||
|
||||
*: file format binary
|
||||
|
||||
Contents of section .data:
|
||||
0000 12000e11 02000000 08000000 0100666f ..............fo
|
||||
0010 6f000000 12000e11 00000000 04000000 o...............
|
||||
0020 02006261 72000000 ..bar...
|
||||
@ -1,5 +1,21 @@
|
||||
.text
|
||||
|
||||
.global foo
|
||||
foo:
|
||||
.long 0x12345678
|
||||
.long 0x9abcdef0
|
||||
|
||||
.global foo
|
||||
foo: # section 0001, offset 00000008
|
||||
.secrel32 bar
|
||||
|
||||
.data
|
||||
.long 0x12345678
|
||||
|
||||
.global bar
|
||||
bar: # section 0002, offset 00000004
|
||||
.long 0x9abcdef0
|
||||
|
||||
.section "gcsect"
|
||||
|
||||
.global baz
|
||||
baz: # unreferenced, will be GC'd out
|
||||
.long 0x12345678
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user