ld: Add minimal pdb generation

8 files changed, 930 insertions, 9 deletions

diff --git a/ld/Makefile.am b/ld/Makefile.am
index b4ec47a..73a4d07 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -476,12 +476,14 @@ ALL_64_EMUL_EXTRA_OFILES = \
 CFILES = ldctor.c ldemul.c ldexp.c ldfile.c ldlang.c \
 	ldmain.c ldmisc.c ldver.c ldwrite.c lexsup.c \
 	mri.c ldcref.c pe-dll.c pep-dll.c ldlex-wrapper.c \
-	plugin.c ldbuildid.c ldelf.c ldelfgen.c
+	plugin.c ldbuildid.c ldelf.c ldelfgen.c \
+	pdb.c
 
 HFILES = ld.h ldctor.h ldemul.h ldexp.h ldfile.h \
 	ldlang.h ldlex.h ldmain.h ldmisc.h ldver.h \
 	ldwrite.h mri.h deffile.h pe-dll.h pep-dll.h \
-	elf-hints-local.h plugin.h ldbuildid.h ldelf.h ldelfgen.h
+	elf-hints-local.h plugin.h ldbuildid.h ldelf.h ldelfgen.h \
+	pdb.h
 
 GENERATED_CFILES = ldgram.c ldlex.c deffilep.c
 GENERATED_HFILES = ldgram.h ldemul-list.h deffilep.h
@@ -494,7 +496,7 @@ OFILES = ldgram.@OBJEXT@ ldlex-wrapper.@OBJEXT@ lexsup.@OBJEXT@ ldlang.@OBJEXT@
 	mri.@OBJEXT@ ldctor.@OBJEXT@ ldmain.@OBJEXT@ plugin.@OBJEXT@ \
 	ldwrite.@OBJEXT@ ldexp.@OBJEXT@  ldemul.@OBJEXT@ ldver.@OBJEXT@ ldmisc.@OBJEXT@ \
 	ldfile.@OBJEXT@ ldcref.@OBJEXT@ ${EMULATION_OFILES} ${EMUL_EXTRA_OFILES} \
-	ldbuildid.@OBJEXT@
+	ldbuildid.@OBJEXT@ pdb.@OBJEXT@
 
 STAGESTUFF = *.@OBJEXT@ ldscripts/* e*.c
 
@@ -957,7 +959,7 @@ EXTRA_ld_new_SOURCES += pep-dll.c pe-dll.c ldelf.c ldelfgen.c
 
 ld_new_SOURCES = ldgram.y ldlex-wrapper.c lexsup.c ldlang.c mri.c ldctor.c ldmain.c \
 	ldwrite.c ldexp.c ldemul.c ldver.c ldmisc.c ldfile.c ldcref.c plugin.c \
-	ldbuildid.c
+	ldbuildid.c pdb.c
 ld_new_DEPENDENCIES = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) \
 		      $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL_DEP) $(JANSSON_LIBS)
 ld_new_LDADD = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) $(BFDLIB) $(LIBCTF) \
diff --git a/ld/Makefile.in b/ld/Makefile.in
index 21d7edb..0d3a6ce 100644
--- a/ld/Makefile.in
+++ b/ld/Makefile.in
@@ -212,7 +212,7 @@ am_ld_new_OBJECTS = ldgram.$(OBJEXT) ldlex-wrapper.$(OBJEXT) \
 	ldctor.$(OBJEXT) ldmain.$(OBJEXT) ldwrite.$(OBJEXT) \
 	ldexp.$(OBJEXT) ldemul.$(OBJEXT) ldver.$(OBJEXT) \
 	ldmisc.$(OBJEXT) ldfile.$(OBJEXT) ldcref.$(OBJEXT) \
-	plugin.$(OBJEXT) ldbuildid.$(OBJEXT)
+	plugin.$(OBJEXT) ldbuildid.$(OBJEXT) pdb.$(OBJEXT)
 ld_new_OBJECTS = $(am_ld_new_OBJECTS)
 am__DEPENDENCIES_1 =
 @ENABLE_LIBCTF_TRUE@am__DEPENDENCIES_2 = ../libctf/libctf.la
@@ -974,12 +974,14 @@ ALL_64_EMUL_EXTRA_OFILES = \
 CFILES = ldctor.c ldemul.c ldexp.c ldfile.c ldlang.c \
 	ldmain.c ldmisc.c ldver.c ldwrite.c lexsup.c \
 	mri.c ldcref.c pe-dll.c pep-dll.c ldlex-wrapper.c \
-	plugin.c ldbuildid.c ldelf.c ldelfgen.c
+	plugin.c ldbuildid.c ldelf.c ldelfgen.c \
+	pdb.c
 
 HFILES = ld.h ldctor.h ldemul.h ldexp.h ldfile.h \
 	ldlang.h ldlex.h ldmain.h ldmisc.h ldver.h \
 	ldwrite.h mri.h deffile.h pe-dll.h pep-dll.h \
-	elf-hints-local.h plugin.h ldbuildid.h ldelf.h ldelfgen.h
+	elf-hints-local.h plugin.h ldbuildid.h ldelf.h ldelfgen.h \
+	pdb.h
 
 GENERATED_CFILES = ldgram.c ldlex.c deffilep.c
 GENERATED_HFILES = ldgram.h ldemul-list.h deffilep.h
@@ -991,7 +993,7 @@ OFILES = ldgram.@OBJEXT@ ldlex-wrapper.@OBJEXT@ lexsup.@OBJEXT@ ldlang.@OBJEXT@
 	mri.@OBJEXT@ ldctor.@OBJEXT@ ldmain.@OBJEXT@ plugin.@OBJEXT@ \
 	ldwrite.@OBJEXT@ ldexp.@OBJEXT@  ldemul.@OBJEXT@ ldver.@OBJEXT@ ldmisc.@OBJEXT@ \
 	ldfile.@OBJEXT@ ldcref.@OBJEXT@ ${EMULATION_OFILES} ${EMUL_EXTRA_OFILES} \
-	ldbuildid.@OBJEXT@
+	ldbuildid.@OBJEXT@ pdb.@OBJEXT@
 
 STAGESTUFF = *.@OBJEXT@ ldscripts/* e*.c
 SRC_POTFILES = $(CFILES) $(HFILES)
@@ -1010,7 +1012,7 @@ EXTRA_ld_new_SOURCES = deffilep.y ldlex.l pep-dll.c pe-dll.c ldelf.c \
 	$(ALL_64_EMULATION_SOURCES)
 ld_new_SOURCES = ldgram.y ldlex-wrapper.c lexsup.c ldlang.c mri.c ldctor.c ldmain.c \
 	ldwrite.c ldexp.c ldemul.c ldver.c ldmisc.c ldfile.c ldcref.c plugin.c \
-	ldbuildid.c
+	ldbuildid.c pdb.c
 
 ld_new_DEPENDENCIES = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) \
 		      $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL_DEP) $(JANSSON_LIBS)
@@ -1575,6 +1577,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libldtestplug4_la-testplug4.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libldtestplug_la-testplug.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mri.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pdb.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pe-dll.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/pep-dll.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plugin.Po@am__quote@
diff --git a/ld/emultempl/pe.em b/ld/emultempl/pe.em
index db90679..9072595 100644
--- a/ld/emultempl/pe.em
+++ b/ld/emultempl/pe.em
@@ -66,6 +66,7 @@ fragment <<EOF
 #include "ldctor.h"
 #include "ldbuildid.h"
 #include "coff/internal.h"
+#include "pdb.h"
 
 /* FIXME: See bfd/peXXigen.c for why we include an architecture specific
    header in generic PE code.  */
@@ -1353,6 +1354,12 @@ write_build_id (bfd *abfd)
   if (bfd_bwrite (contents, size, abfd) != size)
     return 0;
 
+  if (pdb)
+    {
+      if (!create_pdb_file (abfd, pdb_name, build_id))
+	return 0;
+    }
+
   /* Construct the CodeView record.  */
   CODEVIEW_INFO cvinfo;
   cvinfo.CVSignature = CVINFO_PDB70_CVSIGNATURE;
diff --git a/ld/emultempl/pep.em b/ld/emultempl/pep.em
index 66cc61e..e2c538e 100644
--- a/ld/emultempl/pep.em
+++ b/ld/emultempl/pep.em
@@ -73,6 +73,7 @@ fragment <<EOF
 #include "ldctor.h"
 #include "ldbuildid.h"
 #include "coff/internal.h"
+#include "pdb.h"
 
 /* FIXME: See bfd/peXXigen.c for why we include an architecture specific
    header in generic PE code.  */
@@ -1345,6 +1346,12 @@ write_build_id (bfd *abfd)
   if (bfd_bwrite (contents, size, abfd) != size)
     return 0;
 
+  if (pdb)
+    {
+      if (!create_pdb_file (abfd, pdb_name, build_id))
+	return 0;
+    }
+
   /* Construct the CodeView record.  */
   CODEVIEW_INFO cvinfo;
   cvinfo.CVSignature = CVINFO_PDB70_CVSIGNATURE;
diff --git a/ld/pdb.c b/ld/pdb.c
new file mode 100644
index 0000000..3452e2c
--- /dev/null
+++ b/ld/pdb.c
@@ -0,0 +1,522 @@
+/* Support for generating PDB CodeView debugging files.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+   This file is part of the GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "pdb.h"
+#include "bfdlink.h"
+#include "ld.h"
+#include "ldmisc.h"
+#include "libbfd.h"
+#include "libiberty.h"
+#include "coff/i386.h"
+#include "coff/external.h"
+#include "coff/internal.h"
+#include "coff/pe.h"
+#include "libcoff.h"
+#include <time.h>
+
+struct public
+{
+  struct public *next;
+  uint32_t offset;
+  uint32_t hash;
+  unsigned int index;
+  uint16_t section;
+  uint32_t address;
+};
+
+/* Add a new stream to the PDB archive, and return its BFD.  */
+static bfd *
+add_stream (bfd *pdb, const char *name, uint16_t *stream_num)
+{
+  bfd *stream;
+  uint16_t num;
+
+  stream = bfd_create (name ? name : "", pdb);
+  if (!stream)
+    return NULL;
+
+  if (!bfd_make_writable (stream))
+    {
+      bfd_close (stream);
+      return false;
+    }
+
+  if (!pdb->archive_head)
+    {
+      bfd_set_archive_head (pdb, stream);
+      num = 0;
+    }
+  else
+    {
+      bfd *b = pdb->archive_head;
+
+      num = 1;
+
+      while (b->archive_next)
+	{
+	  num++;
+	  b = b->archive_next;
+	}
+
+      b->archive_next = stream;
+    }
+
+  if (stream_num)
+    *stream_num = num;
+
+  return stream;
+}
+
+/* Stream 0 ought to be a copy of the MSF directory from the last
+   time the PDB file was written.  Because we don't do incremental
+   writes this isn't applicable to us, but we fill it with a dummy
+   value so as not to confuse radare.  */
+static bool
+create_old_directory_stream (bfd *pdb)
+{
+  bfd *stream;
+  char buf[sizeof (uint32_t)];
+
+  stream = add_stream (pdb, NULL, NULL);
+  if (!stream)
+    return false;
+
+  bfd_putl32 (0, buf);
+
+  return bfd_bwrite (buf, sizeof (uint32_t), stream) == sizeof (uint32_t);
+}
+
+/* Calculate the hash of a given string.  */
+static uint32_t
+calc_hash (const char *data, size_t len)
+{
+  uint32_t hash = 0;
+
+  while (len >= 4)
+    {
+      hash ^= data[0];
+      hash ^= data[1] << 8;
+      hash ^= data[2] << 16;
+      hash ^= data[3] << 24;
+
+      data += 4;
+      len -= 4;
+    }
+
+  if (len >= 2)
+    {
+      hash ^= data[0];
+      hash ^= data[1] << 8;
+
+      data += 2;
+      len -= 2;
+    }
+
+  if (len != 0)
+    hash ^= *data;
+
+  hash |= 0x20202020;
+  hash ^= (hash >> 11);
+
+  return hash ^ (hash >> 16);
+}
+
+/* Stream 1 is the PDB info stream - see
+   https://llvm.org/docs/PDB/PdbStream.html.  */
+static bool
+populate_info_stream (bfd *pdb, bfd *info_stream, const unsigned char *guid)
+{
+  bool ret = false;
+  struct pdb_stream_70 h;
+  uint32_t num_entries, num_buckets;
+  uint32_t names_length, stream_num;
+  char int_buf[sizeof (uint32_t)];
+
+  struct hash_entry
+  {
+    uint32_t offset;
+    uint32_t value;
+  };
+
+  struct hash_entry **buckets = NULL;
+
+  /* Write header.  */
+
+  bfd_putl32 (PDB_STREAM_VERSION_VC70, &h.version);
+  bfd_putl32 (time (NULL), &h.signature);
+  bfd_putl32 (1, &h.age);
+
+  bfd_putl32 (bfd_getb32 (guid), h.guid);
+  bfd_putl16 (bfd_getb16 (&guid[4]), &h.guid[4]);
+  bfd_putl16 (bfd_getb16 (&guid[6]), &h.guid[6]);
+  memcpy (&h.guid[8], &guid[8], 8);
+
+  if (bfd_bwrite (&h, sizeof (h), info_stream) != sizeof (h))
+    return false;
+
+  /* Write hash list of named streams.  This is a "rollover" hash, i.e.
+     if a bucket is filled an entry gets placed in the next free
+     slot.  */
+
+  num_entries = 0;
+  for (bfd *b = pdb->archive_head; b; b = b->archive_next)
+    {
+      if (strcmp (b->filename, ""))
+	num_entries++;
+    }
+
+  num_buckets = num_entries * 2;
+
+  names_length = 0;
+  stream_num = 0;
+
+  if (num_buckets > 0)
+    {
+      buckets = xmalloc (sizeof (struct hash_entry *) * num_buckets);
+      memset (buckets, 0, sizeof (struct hash_entry *) * num_buckets);
+
+      for (bfd *b = pdb->archive_head; b; b = b->archive_next)
+	{
+	  if (strcmp (b->filename, ""))
+	    {
+	      size_t len = strlen (b->filename);
+	      uint32_t hash = (uint16_t) calc_hash (b->filename, len);
+	      uint32_t bucket_num = hash % num_buckets;
+
+	      while (buckets[bucket_num])
+		{
+		  bucket_num++;
+
+		  if (bucket_num == num_buckets)
+		    bucket_num = 0;
+		}
+
+	      buckets[bucket_num] = xmalloc (sizeof (struct hash_entry));
+
+	      buckets[bucket_num]->offset = names_length;
+	      buckets[bucket_num]->value = stream_num;
+
+	      names_length += len + 1;
+	    }
+
+	  stream_num++;
+	}
+    }
+
+  /* Write the strings list - the hash keys are indexes into this.  */
+
+  bfd_putl32 (names_length, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  for (bfd *b = pdb->archive_head; b; b = b->archive_next)
+    {
+      if (!strcmp (b->filename, ""))
+	continue;
+
+      size_t len = strlen (b->filename) + 1;
+
+      if (bfd_bwrite (b->filename, len, info_stream) != len)
+	goto end;
+    }
+
+  /* Write the number of entries and buckets.  */
+
+  bfd_putl32 (num_entries, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  bfd_putl32 (num_buckets, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  /* Write the present bitmap.  */
+
+  bfd_putl32 ((num_buckets + 31) / 32, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  for (unsigned int i = 0; i < num_buckets; i += 32)
+    {
+      uint32_t v = 0;
+
+      for (unsigned int j = 0; j < 32; j++)
+	{
+	  if (i + j >= num_buckets)
+	    break;
+
+	  if (buckets[i + j])
+	    v |= 1 << j;
+	}
+
+      bfd_putl32 (v, int_buf);
+
+      if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+	  sizeof (uint32_t))
+	goto end;
+    }
+
+  /* Write the (empty) deleted bitmap.  */
+
+  bfd_putl32 (0, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  /* Write the buckets.  */
+
+  for (unsigned int i = 0; i < num_buckets; i++)
+    {
+      if (buckets[i])
+	{
+	  bfd_putl32 (buckets[i]->offset, int_buf);
+
+	  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+	      sizeof (uint32_t))
+	    goto end;
+
+	  bfd_putl32 (buckets[i]->value, int_buf);
+
+	  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+	      sizeof (uint32_t))
+	    goto end;
+	}
+    }
+
+  bfd_putl32 (0, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  bfd_putl32 (PDB_STREAM_VERSION_VC140, int_buf);
+
+  if (bfd_bwrite (int_buf, sizeof (uint32_t), info_stream) !=
+      sizeof (uint32_t))
+    goto end;
+
+  ret = true;
+
+end:
+  for (unsigned int i = 0; i < num_buckets; i++)
+    {
+      if (buckets[i])
+	free (buckets[i]);
+    }
+
+  free (buckets);
+
+  return ret;
+}
+
+/* Stream 2 is the type information (TPI) stream, and stream 4 is
+   the ID information (IPI) stream.  They differ only in which records
+   go in which stream. */
+static bool
+create_type_stream (bfd *pdb)
+{
+  bfd *stream;
+  struct pdb_tpi_stream_header h;
+
+  stream = add_stream (pdb, NULL, NULL);
+  if (!stream)
+    return false;
+
+  bfd_putl32 (TPI_STREAM_VERSION_80, &h.version);
+  bfd_putl32 (sizeof (h), &h.header_size);
+  bfd_putl32 (TPI_FIRST_INDEX, &h.type_index_begin);
+  bfd_putl32 (TPI_FIRST_INDEX, &h.type_index_end);
+  bfd_putl32 (0, &h.type_record_bytes);
+  bfd_putl16 (0xffff, &h.hash_stream_index);
+  bfd_putl16 (0xffff, &h.hash_aux_stream_index);
+  bfd_putl32 (4, &h.hash_key_size);
+  bfd_putl32 (0x3ffff, &h.num_hash_buckets);
+  bfd_putl32 (0, &h.hash_value_buffer_offset);
+  bfd_putl32 (0, &h.hash_value_buffer_length);
+  bfd_putl32 (0, &h.index_offset_buffer_offset);
+  bfd_putl32 (0, &h.index_offset_buffer_length);
+  bfd_putl32 (0, &h.hash_adj_buffer_offset);
+  bfd_putl32 (0, &h.hash_adj_buffer_length);
+
+  if (bfd_bwrite (&h, sizeof (h), stream) != sizeof (h))
+    return false;
+
+  return true;
+}
+
+/* Return the PE architecture number for the image.  */
+static uint16_t
+get_arch_number (bfd *abfd)
+{
+  if (abfd->arch_info->arch != bfd_arch_i386)
+    return 0;
+
+  if (abfd->arch_info->mach & bfd_mach_x86_64)
+    return IMAGE_FILE_MACHINE_AMD64;
+
+  return IMAGE_FILE_MACHINE_I386;
+}
+
+/* Stream 4 is the debug information (DBI) stream.  */
+static bool
+populate_dbi_stream (bfd *stream, bfd *abfd)
+{
+  struct pdb_dbi_stream_header h;
+  struct optional_dbg_header opt;
+
+  bfd_putl32 (0xffffffff, &h.version_signature);
+  bfd_putl32 (DBI_STREAM_VERSION_70, &h.version_header);
+  bfd_putl32 (1, &h.age);
+  bfd_putl16 (0xffff, &h.global_stream_index);
+  bfd_putl16 (0x8e1d, &h.build_number); // MSVC 14.29
+  bfd_putl16 (0xffff, &h.public_stream_index);
+  bfd_putl16 (0, &h.pdb_dll_version);
+  bfd_putl16 (0xffff, &h.sym_record_stream);
+  bfd_putl16 (0, &h.pdb_dll_rbld);
+  bfd_putl32 (0, &h.mod_info_size);
+  bfd_putl32 (0, &h.section_contribution_size);
+  bfd_putl32 (0, &h.section_map_size);
+  bfd_putl32 (0, &h.source_info_size);
+  bfd_putl32 (0, &h.type_server_map_size);
+  bfd_putl32 (0, &h.mfc_type_server_index);
+  bfd_putl32 (sizeof (opt), &h.optional_dbg_header_size);
+  bfd_putl32 (0, &h.ec_substream_size);
+  bfd_putl16 (0, &h.flags);
+  bfd_putl16 (get_arch_number (abfd), &h.machine);
+  bfd_putl32 (0, &h.padding);
+
+  if (bfd_bwrite (&h, sizeof (h), stream) != sizeof (h))
+    return false;
+
+  bfd_putl16 (0xffff, &opt.fpo_stream);
+  bfd_putl16 (0xffff, &opt.exception_stream);
+  bfd_putl16 (0xffff, &opt.fixup_stream);
+  bfd_putl16 (0xffff, &opt.omap_to_src_stream);
+  bfd_putl16 (0xffff, &opt.omap_from_src_stream);
+  bfd_putl16 (0xffff, &opt.section_header_stream);
+  bfd_putl16 (0xffff, &opt.token_map_stream);
+  bfd_putl16 (0xffff, &opt.xdata_stream);
+  bfd_putl16 (0xffff, &opt.pdata_stream);
+  bfd_putl16 (0xffff, &opt.new_fpo_stream);
+  bfd_putl16 (0xffff, &opt.orig_section_header_stream);
+
+  if (bfd_bwrite (&opt, sizeof (opt), stream) != sizeof (opt))
+    return false;
+
+  return true;
+}
+
+/* Create a PDB debugging file for the PE image file abfd with the build ID
+   guid, stored at pdb_name.  */
+bool
+create_pdb_file (bfd *abfd, const char *pdb_name, const unsigned char *guid)
+{
+  bfd *pdb;
+  bool ret = false;
+  bfd *info_stream, *dbi_stream, *names_stream;
+
+  pdb = bfd_openw (pdb_name, "pdb");
+  if (!pdb)
+    {
+      einfo (_("%P: warning: cannot create PDB file: %s\n"),
+	     bfd_errmsg (bfd_get_error ()));
+      return false;
+    }
+
+  bfd_set_format (pdb, bfd_archive);
+
+  if (!create_old_directory_stream (pdb))
+    {
+      einfo (_("%P: warning: cannot create old directory stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  info_stream = add_stream (pdb, NULL, NULL);
+
+  if (!info_stream)
+    {
+      einfo (_("%P: warning: cannot create info stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  if (!create_type_stream (pdb))
+    {
+      einfo (_("%P: warning: cannot create TPI stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  dbi_stream = add_stream (pdb, NULL, NULL);
+
+  if (!dbi_stream)
+    {
+      einfo (_("%P: warning: cannot create DBI stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  if (!create_type_stream (pdb))
+    {
+      einfo (_("%P: warning: cannot create IPI stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  names_stream = add_stream (pdb, "/names", NULL);
+
+  if (!names_stream)
+    {
+      einfo (_("%P: warning: cannot create /names stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  if (!populate_dbi_stream (dbi_stream, abfd))
+    {
+      einfo (_("%P: warning: cannot populate DBI stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  if (!populate_info_stream (pdb, info_stream, guid))
+    {
+      einfo (_("%P: warning: cannot populate info stream "
+	       "in PDB file: %s\n"), bfd_errmsg (bfd_get_error ()));
+      goto end;
+    }
+
+  ret = true;
+
+end:
+  bfd_close (pdb);
+
+  return ret;
+}
diff --git a/ld/pdb.h b/ld/pdb.h
new file mode 100644
index 0000000..e5f53b4
--- /dev/null
+++ b/ld/pdb.h
@@ -0,0 +1,111 @@
+/* pdb.h - header file for generating PDB CodeView debugging files.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+   This file is part of the GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+/* Header files referred to below can be found in Microsoft's PDB
+   repository: https://github.com/microsoft/microsoft-pdb.  */
+
+#ifndef PDB_H
+#define PDB_H
+
+#include "sysdep.h"
+#include "bfd.h"
+#include <stdbool.h>
+
+/* PDBStream70 in pdb1.h */
+struct pdb_stream_70
+{
+  uint32_t version;
+  uint32_t signature;
+  uint32_t age;
+  uint8_t guid[16];
+};
+
+#define PDB_STREAM_VERSION_VC70		20000404
+#define PDB_STREAM_VERSION_VC140	20140508
+
+/* HDR in tpi.h */
+struct pdb_tpi_stream_header
+{
+  uint32_t version;
+  uint32_t header_size;
+  uint32_t type_index_begin;
+  uint32_t type_index_end;
+  uint32_t type_record_bytes;
+  uint16_t hash_stream_index;
+  uint16_t hash_aux_stream_index;
+  uint32_t hash_key_size;
+  uint32_t num_hash_buckets;
+  uint32_t hash_value_buffer_offset;
+  uint32_t hash_value_buffer_length;
+  uint32_t index_offset_buffer_offset;
+  uint32_t index_offset_buffer_length;
+  uint32_t hash_adj_buffer_offset;
+  uint32_t hash_adj_buffer_length;
+};
+
+#define TPI_STREAM_VERSION_80		20040203
+
+#define TPI_FIRST_INDEX			0x1000
+
+/* NewDBIHdr in dbi.h */
+struct pdb_dbi_stream_header
+{
+  uint32_t version_signature;
+  uint32_t version_header;
+  uint32_t age;
+  uint16_t global_stream_index;
+  uint16_t build_number;
+  uint16_t public_stream_index;
+  uint16_t pdb_dll_version;
+  uint16_t sym_record_stream;
+  uint16_t pdb_dll_rbld;
+  uint32_t mod_info_size;
+  uint32_t section_contribution_size;
+  uint32_t section_map_size;
+  uint32_t source_info_size;
+  uint32_t type_server_map_size;
+  uint32_t mfc_type_server_index;
+  uint32_t optional_dbg_header_size;
+  uint32_t ec_substream_size;
+  uint16_t flags;
+  uint16_t machine;
+  uint32_t padding;
+};
+
+#define DBI_STREAM_VERSION_70		19990903
+
+struct optional_dbg_header
+{
+  uint16_t fpo_stream;
+  uint16_t exception_stream;
+  uint16_t fixup_stream;
+  uint16_t omap_to_src_stream;
+  uint16_t omap_from_src_stream;
+  uint16_t section_header_stream;
+  uint16_t token_map_stream;
+  uint16_t xdata_stream;
+  uint16_t pdata_stream;
+  uint16_t new_fpo_stream;
+  uint16_t orig_section_header_stream;
+};
+
+extern bool create_pdb_file (bfd *, const char *, const unsigned char *);
+
+#endif
diff --git a/ld/po/SRC-POTFILES.in b/ld/po/SRC-POTFILES.in
index bbadc8e..61871ad 100644
--- a/ld/po/SRC-POTFILES.in
+++ b/ld/po/SRC-POTFILES.in
@@ -31,6 +31,8 @@ ldwrite.h
 lexsup.c
 mri.c
 mri.h
+pdb.c
+pdb.h
 pe-dll.c
 pe-dll.h
 pep-dll.c
diff --git a/ld/testsuite/ld-pe/pdb.exp b/ld/testsuite/ld-pe/pdb.exp
index 1560241..b62ce6d 100644
--- a/ld/testsuite/ld-pe/pdb.exp
+++ b/ld/testsuite/ld-pe/pdb.exp
@@ -35,6 +35,249 @@ proc get_pdb_name { pe } {
     return $pdb
 }
 
+proc get_pdb_guid { pe } {
+    global OBJDUMP
+
+    set exec_output [run_host_cmd "$OBJDUMP" "-p $pe"]
+
+    if ![regexp -line "^\\(format RSDS signature (\[0-9a-fA-F\]{32}) age 1 pdb (.*)\\)$" $exec_output full sig pdb] {
+	return ""
+    }
+
+    return $sig
+}
+
+proc check_pdb_info_stream { pdb guid } {
+    global ar
+
+    set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb 0001"]
+
+    if ![string match "" $exec_output] {
+	return 0
+    }
+
+    set fi [open tmpdir/0001]
+    fconfigure $fi -translation binary
+
+    # check version
+
+    set data [read $fi 4]
+    binary scan $data i version
+
+    if { $version != 20000404 } {
+	close $fi
+	return 0
+    }
+
+    # skip signature (timestamp)
+    read $fi 4
+
+    # check age
+
+    set data [read $fi 4]
+    binary scan $data i age
+
+    if { $age != 1 } {
+	close $fi
+	return 0
+    }
+
+    # check GUID
+
+    set data [read $fi 16]
+    binary scan $data H2H2H2H2H2H2H2H2H* guid1 guid2 guid3 guid4 guid5 guid6 guid7 guid8 guid9
+
+    set data "$guid4$guid3$guid2$guid1$guid6$guid5$guid8$guid7$guid9"
+
+    if { $data ne $guid } {
+	close $fi
+	return 0
+    }
+
+    # skip names string
+
+    set data [read $fi 4]
+    binary scan $data i names_length
+    read $fi $names_length
+
+    # read number of names entries
+
+    set data [read $fi 4]
+    binary scan $data i num_entries
+
+    # skip number of buckets
+    read $fi 4
+
+    # skip present bitmap
+
+    set data [read $fi 4]
+    binary scan $data i bitmap_length
+    read $fi [expr $bitmap_length * 4]
+
+    # skip deleted bitmap
+
+    set data [read $fi 4]
+    binary scan $data i bitmap_length
+    read $fi [expr $bitmap_length * 4]
+
+    # skip names entries
+    read $fi [expr $num_entries * 8]
+
+    # skip uint32_t
+    read $fi 4
+
+    # read second version
+
+    set data [read $fi 4]
+    binary scan $data i version2
+
+    if { $version2 != 20140508 } {
+	close $fi
+	return 0
+    }
+
+    close $fi
+
+    return 1
+}
+
+proc check_type_stream { pdb stream } {
+    global ar
+
+    set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb $stream"]
+
+    if ![string match "" $exec_output] {
+	return 0
+    }
+
+    set fi [open tmpdir/$stream]
+    fconfigure $fi -translation binary
+
+    # check version
+
+    set data [read $fi 4]
+    binary scan $data i version
+
+    if { $version != 20040203 } {
+	close $fi
+	return 0
+    }
+
+    # check header size
+
+    set data [read $fi 4]
+    binary scan $data i header_size
+
+    if { $header_size != 0x38 } {
+	close $fi
+	return 0
+    }
+
+    # skip type_index_begin and type_index_end
+    read $fi 8
+
+    # read type_record_bytes
+
+    set data [read $fi 4]
+    binary scan $data i type_record_bytes
+
+    close $fi
+
+    # check stream length
+
+    set stream_length [file size tmpdir/$stream]
+
+    if { $stream_length != [ expr $header_size + $type_record_bytes ] } {
+	return 0
+    }
+
+    return 1
+}
+
+proc check_dbi_stream { pdb } {
+    global ar
+
+    set exec_output [run_host_cmd "$ar" "x --output tmpdir $pdb 0003"]
+
+    if ![string match "" $exec_output] {
+	return 0
+    }
+
+    set fi [open tmpdir/0003]
+    fconfigure $fi -translation binary
+
+    # check signature
+
+    set data [read $fi 4]
+    binary scan $data i signature
+
+    if { $signature != -1 } {
+	close $fi
+	return 0
+    }
+
+    # check version
+
+    set data [read $fi 4]
+    binary scan $data i version
+
+    if { $version != 19990903 } {
+	close $fi
+	return 0
+    }
+
+    # check age
+
+    set data [read $fi 4]
+    binary scan $data i age
+
+    if { $age != 1 } {
+	close $fi
+	return 0
+    }
+
+    # skip fields
+    read $fi 12
+
+    # read substream sizes
+
+    set data [read $fi 4]
+    binary scan $data i mod_info_size
+
+    set data [read $fi 4]
+    binary scan $data i section_contribution_size
+
+    set data [read $fi 4]
+    binary scan $data i section_map_size
+
+    set data [read $fi 4]
+    binary scan $data i source_info_size
+
+    set data [read $fi 4]
+    binary scan $data i type_server_map_size
+
+    set data [read $fi 4]
+    binary scan $data i mfc_type_server_index
+
+    set data [read $fi 4]
+    binary scan $data i optional_dbg_header_size
+
+    set data [read $fi 4]
+    binary scan $data i ec_substream_size
+
+    close $fi
+
+    # check stream length
+
+    set stream_length [file size tmpdir/0003]
+
+    if { $stream_length != [expr 0x40 + $mod_info_size + $section_contribution_size + $section_map_size + $source_info_size + $type_server_map_size + $mfc_type_server_index + $optional_dbg_header_size + $ec_substream_size] } {
+	return 0
+    }
+
+    return 1
+}
+
 if ![ld_assemble $as $srcdir/$subdir/pdb1.s tmpdir/pdb1.o] {
     unsupported "Build pdb1.o"
     return
@@ -51,3 +294,27 @@ if ![string equal [get_pdb_name "tmpdir/pdb1.exe"] "pdb1.pdb"] {
 }
 
 pass "PDB filename present in CodeView debug info"
+
+if [check_pdb_info_stream tmpdir/pdb1.pdb [get_pdb_guid "tmpdir/pdb1.exe"]] {
+    pass "Valid PDB info stream"
+} else {
+    fail "Invalid PDB info stream"
+}
+
+if [check_type_stream tmpdir/pdb1.pdb "0002"] {
+    pass "Valid TPI stream"
+} else {
+    fail "Invalid TPI stream"
+}
+
+if [check_type_stream tmpdir/pdb1.pdb "0004"] {
+    pass "Valid IPI stream"
+} else {
+    fail "Invalid IPI stream"
+}
+
+if [check_dbi_stream tmpdir/pdb1.pdb] {
+    pass "Valid DBI stream"
+} else {
+    fail "Invalid DBI stream"
+}