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binutils-gdb/ld/pdb.c
Sam James bf447eec6d
ld: fix -std=gnu23 compatibility wrt _Bool 
GCC trunk now defaults to -std=gnu23. We return false in a few places
which can't work when true/false are a proper type (_Bool). Return NULL
where appropriate instead of false. All callers handle this appropriately.

ChangeLog:
	PR ld/32372

	* pdb.c (add_stream): Return NULL.
2024-11-18 03:09:16 +00:00

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/* Support for generating PDB CodeView debugging files.
Copyright (C) 2022-2024 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 "ldmain.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;
};
struct string
{
struct string *next;
uint32_t hash;
uint32_t offset;
uint32_t source_file_offset;
size_t len;
char s[];
};
struct string_table
{
struct string *strings_head;
struct string *strings_tail;
uint32_t strings_len;
htab_t hashmap;
};
struct mod_source_files
{
uint16_t files_count;
struct string **files;
};
struct source_files_info
{
uint16_t mod_count;
struct mod_source_files *mods;
};
struct type_entry
{
struct type_entry *next;
uint32_t index;
uint32_t cv_hash;
bool has_udt_src_line;
uint8_t data[];
};
struct types
{
htab_t hashmap;
uint32_t num_types;
struct type_entry *first;
struct type_entry *last;
};
struct global
{
struct global *next;
uint32_t offset;
uint32_t hash;
uint32_t refcount;
unsigned int index;
uint8_t data[];
};
struct globals
{
uint32_t num_entries;
struct global *first;
struct global *last;
htab_t hashmap;
};
struct in_sc
{
asection *s;
uint16_t sect_num;
uint16_t mod_index;
};
static const uint32_t crc_table[] =
{
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
static bool remap_type (void *data, struct type_entry **map,
uint32_t type_num, uint32_t num_types);
/* 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 NULL;
}
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_write (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_write (&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_write (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_write (b->filename, len, info_stream) != len)
goto end;
}
/* Write the number of entries and buckets. */
bfd_putl32 (num_entries, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), info_stream) !=
sizeof (uint32_t))
goto end;
bfd_putl32 (num_buckets, int_buf);
if (bfd_write (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_write (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_write (int_buf, sizeof (uint32_t), info_stream) !=
sizeof (uint32_t))
goto end;
}
/* Write the (empty) deleted bitmap. */
bfd_putl32 (0, int_buf);
if (bfd_write (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_write (int_buf, sizeof (uint32_t), info_stream) !=
sizeof (uint32_t))
goto end;
bfd_putl32 (buckets[i]->value, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), info_stream) !=
sizeof (uint32_t))
goto end;
}
}
bfd_putl32 (0, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), info_stream) !=
sizeof (uint32_t))
goto end;
bfd_putl32 (PDB_STREAM_VERSION_VC140, int_buf);
if (bfd_write (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;
}
/* Calculate the CRC32 used for type hashes. */
static uint32_t
crc32 (const uint8_t *data, size_t len)
{
uint32_t crc = 0;
while (len > 0)
{
crc = (crc >> 8) ^ crc_table[(crc & 0xff) ^ *data];
data++;
len--;
}
return crc;
}
/* 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
populate_type_stream (bfd *pdb, bfd *stream, struct types *types)
{
struct pdb_tpi_stream_header h;
struct type_entry *e;
uint32_t len = 0, index_offset_len, off;
struct bfd *hash_stream = NULL;
uint16_t hash_stream_index;
static const uint32_t index_skip = 0x2000;
e = types->first;
index_offset_len = 0;
while (e)
{
uint32_t old_len = len;
len += sizeof (uint16_t) + bfd_getl16 (e->data);
if (old_len == 0 || old_len / index_skip != len / index_skip)
index_offset_len += sizeof (uint32_t) * 2;
e = e->next;
}
/* Each type stream also has a stream which holds the hash value for each
type, along with a skip list to speed up searching. */
hash_stream = add_stream (pdb, "", &hash_stream_index);
if (!hash_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 + types->num_types, &h.type_index_end);
bfd_putl32 (len, &h.type_record_bytes);
bfd_putl16 (hash_stream_index, &h.hash_stream_index);
bfd_putl16 (0xffff, &h.hash_aux_stream_index);
bfd_putl32 (sizeof (uint32_t), &h.hash_key_size);
bfd_putl32 (NUM_TPI_HASH_BUCKETS, &h.num_hash_buckets);
bfd_putl32 (0, &h.hash_value_buffer_offset);
bfd_putl32 (types->num_types * sizeof (uint32_t),
&h.hash_value_buffer_length);
bfd_putl32 (types->num_types * sizeof (uint32_t),
&h.index_offset_buffer_offset);
bfd_putl32 (index_offset_len, &h.index_offset_buffer_length);
bfd_putl32 ((types->num_types * sizeof (uint32_t)) + index_offset_len,
&h.hash_adj_buffer_offset);
bfd_putl32 (0, &h.hash_adj_buffer_length);
if (bfd_write (&h, sizeof (h), stream) != sizeof (h))
return false;
/* Write the type definitions into the main stream, and the hashes
into the hash stream. The hashes have already been calculated
in handle_type. */
e = types->first;
while (e)
{
uint8_t buf[sizeof (uint32_t)];
uint16_t size;
size = bfd_getl16 (e->data);
if (bfd_write (e->data, size + sizeof (uint16_t), stream)
!= size + sizeof (uint16_t))
return false;
bfd_putl32 (e->cv_hash % NUM_TPI_HASH_BUCKETS, buf);
if (bfd_write (buf, sizeof (uint32_t), hash_stream)
!= sizeof (uint32_t))
return false;
e = e->next;
}
/* Write the index offsets, i.e. the skip list, into the hash stream. We
copy MSVC here by writing a new entry for every 8192 bytes. */
e = types->first;
off = 0;
while (e)
{
uint32_t old_off = off;
uint16_t size = bfd_getl16 (e->data);
off += size + sizeof (uint16_t);
if (old_off == 0 || old_off / index_skip != len / index_skip)
{
uint8_t buf[sizeof (uint32_t)];
bfd_putl32 (TPI_FIRST_INDEX + e->index, buf);
if (bfd_write (buf, sizeof (uint32_t), hash_stream)
!= sizeof (uint32_t))
return false;
bfd_putl32 (old_off, buf);
if (bfd_write (buf, sizeof (uint32_t), hash_stream)
!= sizeof (uint32_t))
return false;
}
e = e->next;
}
return true;
}
/* Return the PE architecture number for the image. */
static uint16_t
get_arch_number (bfd *abfd)
{
switch (abfd->arch_info->arch)
{
case bfd_arch_i386:
if (abfd->arch_info->mach & bfd_mach_x86_64)
return IMAGE_FILE_MACHINE_AMD64;
else
return IMAGE_FILE_MACHINE_I386;
case bfd_arch_aarch64:
return IMAGE_FILE_MACHINE_ARM64;
default:
return 0;
}
}
/* Validate the DEBUG_S_FILECHKSMS entry within a module's .debug$S
section, and copy it to the module's symbol stream. */
static bool
copy_filechksms (uint8_t *data, uint32_t size, char *string_table,
struct string_table *strings, uint8_t *out,
struct mod_source_files *mod_source)
{
uint8_t *orig_data = data;
uint32_t orig_size = size;
uint16_t num_files = 0;
struct string **strptr;
bfd_putl32 (DEBUG_S_FILECHKSMS, out);
out += sizeof (uint32_t);
bfd_putl32 (size, out);
out += sizeof (uint32_t);
/* Calculate the number of files, and check for any overflows. */
while (size > 0)
{
struct file_checksum *fc = (struct file_checksum *) data;
uint8_t padding;
size_t len;
if (size < sizeof (struct file_checksum))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
len = sizeof (struct file_checksum) + fc->checksum_length;
if (size < len)
{
bfd_set_error (bfd_error_bad_value);
return false;
}
data += len;
size -= len;
if (len % sizeof (uint32_t))
padding = sizeof (uint32_t) - (len % sizeof (uint32_t));
else
padding = 0;
if (size < padding)
{
bfd_set_error (bfd_error_bad_value);
return false;
}
num_files++;
data += padding;
size -= padding;
}
/* Add the files to mod_source, so that they'll appear in the source
info substream. */
strptr = NULL;
if (num_files > 0)
{
uint16_t new_count = num_files + mod_source->files_count;
mod_source->files = xrealloc (mod_source->files,
sizeof (struct string *) * new_count);
strptr = mod_source->files + mod_source->files_count;
mod_source->files_count += num_files;
}
/* Actually copy the data. */
data = orig_data;
size = orig_size;
while (size > 0)
{
struct file_checksum *fc = (struct file_checksum *) data;
uint32_t string_off;
uint8_t padding;
size_t len;
struct string *str = NULL;
string_off = bfd_getl32 (&fc->file_id);
len = sizeof (struct file_checksum) + fc->checksum_length;
if (len % sizeof (uint32_t))
padding = sizeof (uint32_t) - (len % sizeof (uint32_t));
else
padding = 0;
/* Remap the "file ID", i.e. the offset in the module's string table,
so it points to the right place in the main string table. */
if (string_table)
{
char *fn = string_table + string_off;
size_t fn_len = strlen (fn);
uint32_t hash = calc_hash (fn, fn_len);
void **slot;
slot = htab_find_slot_with_hash (strings->hashmap, fn, hash,
NO_INSERT);
if (slot)
str = (struct string *) *slot;
}
*strptr = str;
strptr++;
bfd_putl32 (str ? str->offset : 0, &fc->file_id);
memcpy (out, data, len + padding);
data += len + padding;
size -= len + padding;
out += len + padding;
}
return true;
}
/* Add a string to the strings table, if it's not already there. Returns its
offset within the string table. */
static uint32_t
add_string (char *str, size_t len, struct string_table *strings)
{
uint32_t hash = calc_hash (str, len);
struct string *s;
void **slot;
slot = htab_find_slot_with_hash (strings->hashmap, str, hash, INSERT);
if (!*slot)
{
*slot = xmalloc (offsetof (struct string, s) + len);
s = (struct string *) *slot;
s->next = NULL;
s->hash = hash;
s->offset = strings->strings_len;
s->source_file_offset = 0xffffffff;
s->len = len;
memcpy (s->s, str, len);
if (strings->strings_tail)
strings->strings_tail->next = s;
else
strings->strings_head = s;
strings->strings_tail = s;
strings->strings_len += len + 1;
}
else
{
s = (struct string *) *slot;
}
return s->offset;
}
/* Return the hash of an entry in the string table. */
static hashval_t
hash_string_table_entry (const void *p)
{
const struct string *s = (const struct string *) p;
return s->hash;
}
/* Compare an entry in the string table with a string. */
static int
eq_string_table_entry (const void *a, const void *b)
{
const struct string *s1 = (const struct string *) a;
const char *s2 = (const char *) b;
size_t s2_len = strlen (s2);
if (s2_len != s1->len)
return 0;
return memcmp (s1->s, s2, s2_len) == 0;
}
/* Parse the string table within the .debug$S section. */
static void
parse_string_table (bfd_byte *data, size_t size,
struct string_table *strings)
{
while (true)
{
size_t len = strnlen ((char *) data, size);
add_string ((char *) data, len, strings);
data += len + 1;
if (size <= len + 1)
break;
size -= len + 1;
}
}
/* Remap a type reference within a CodeView symbol. */
static bool
remap_symbol_type (void *data, struct type_entry **map, uint32_t num_types)
{
uint32_t type = bfd_getl32 (data);
/* Ignore builtin types (those with IDs below 0x1000). */
if (type < TPI_FIRST_INDEX)
return true;
if (type >= TPI_FIRST_INDEX + num_types)
{
einfo (_("%P: CodeView symbol references out of range type %v\n"),
type);
return false;
}
type = TPI_FIRST_INDEX + map[type - TPI_FIRST_INDEX]->index;
bfd_putl32 (type, data);
return true;
}
/* Add an entry into the globals stream. If it already exists, increase
the refcount. */
static bool
add_globals_ref (struct globals *glob, bfd *sym_rec_stream, const char *name,
size_t name_len, uint8_t *data, size_t len)
{
void **slot;
uint32_t hash;
struct global *g;
slot = htab_find_slot_with_hash (glob->hashmap, data,
iterative_hash (data, len, 0), INSERT);
if (*slot)
{
g = *slot;
g->refcount++;
return true;
}
*slot = xmalloc (offsetof (struct global, data) + len);
hash = calc_hash (name, name_len);
hash %= NUM_GLOBALS_HASH_BUCKETS;
g = *slot;
g->next = NULL;
g->offset = bfd_tell (sym_rec_stream);
g->hash = hash;
g->refcount = 1;
memcpy (g->data, data, len);
glob->num_entries++;
if (glob->last)
glob->last->next = g;
else
glob->first = g;
glob->last = g;
return bfd_write (data, len, sym_rec_stream) == len;
}
/* Find the end of the current scope within symbols data. */
static uint8_t *
find_end_of_scope (uint8_t *data, uint32_t size)
{
unsigned int scope_level = 1;
uint16_t len;
len = bfd_getl16 (data) + sizeof (uint16_t);
data += len;
size -= len;
while (true)
{
uint16_t type;
if (size < sizeof (uint32_t))
return NULL;
len = bfd_getl16 (data) + sizeof (uint16_t);
type = bfd_getl16 (data + sizeof (uint16_t));
if (size < len)
return NULL;
switch (type)
{
case S_GPROC32:
case S_LPROC32:
case S_BLOCK32:
case S_INLINESITE:
case S_THUNK32:
scope_level++;
break;
case S_END:
case S_PROC_ID_END:
case S_INLINESITE_END:
scope_level--;
if (scope_level == 0)
return data;
break;
}
data += len;
size -= len;
}
}
/* Return the size of an extended value parameter, as used in
LF_ENUMERATE etc. */
static unsigned int
extended_value_len (uint16_t type)
{
switch (type)
{
case LF_CHAR:
return 1;
case LF_SHORT:
case LF_USHORT:
return 2;
case LF_LONG:
case LF_ULONG:
return 4;
case LF_QUADWORD:
case LF_UQUADWORD:
return 8;
}
return 0;
}
/* Parse the symbols in a .debug$S section, and copy them to the module's
symbol stream. */
static bool
parse_symbols (uint8_t *data, uint32_t size, uint8_t **buf,
struct type_entry **map, uint32_t num_types,
bfd *sym_rec_stream, struct globals *glob, uint16_t mod_num)
{
uint8_t *orig_buf = *buf;
unsigned int scope_level = 0;
uint8_t *scope = NULL;
while (size >= sizeof (uint16_t))
{
uint16_t len, type;
len = bfd_getl16 (data) + sizeof (uint16_t);
if (len > size)
{
bfd_set_error (bfd_error_bad_value);
return false;
}
type = bfd_getl16 (data + sizeof (uint16_t));
switch (type)
{
case S_LDATA32:
case S_GDATA32:
case S_LTHREAD32:
case S_GTHREAD32:
{
struct datasym *d = (struct datasym *) data;
size_t name_len;
if (len < offsetof (struct datasym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_LDATA32/S_GDATA32/S_LTHREAD32/S_GTHREAD32\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (scope_level == 0)
{
uint16_t section = bfd_getl16 (&d->section);
if (section == 0) /* GC'd, ignore */
break;
}
name_len =
strnlen (d->name, len - offsetof (struct datasym, name));
if (name_len == len - offsetof (struct datasym, name))
{
einfo (_("%P: warning: name for S_LDATA32/S_GDATA32/"
"S_LTHREAD32/S_GTHREAD32 has no terminating"
" zero\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&d->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
/* If S_LDATA32 or S_LTHREAD32, copy into module symbols. */
if (type == S_LDATA32 || type == S_LTHREAD32)
{
memcpy (*buf, d, len);
*buf += len;
}
/* S_LDATA32 and S_LTHREAD32 only go in globals if
not in function scope. */
if (type == S_GDATA32 || type == S_GTHREAD32 || scope_level == 0)
{
if (!add_globals_ref (glob, sym_rec_stream, d->name,
name_len, data, len))
return false;
}
break;
}
case S_GPROC32:
case S_LPROC32:
case S_GPROC32_ID:
case S_LPROC32_ID:
{
struct procsym *proc = (struct procsym *) data;
size_t name_len;
uint16_t section;
uint32_t end;
uint8_t *endptr;
size_t ref_size, padding;
struct refsym *ref;
if (len < offsetof (struct procsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_GPROC32/S_LPROC32\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
section = bfd_getl16 (&proc->section);
endptr = find_end_of_scope (data, size);
if (!endptr)
{
einfo (_("%P: warning: could not find end of"
" S_GPROC32/S_LPROC32 record\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (section == 0) /* skip if GC'd */
{
/* Skip to after S_END. */
size -= endptr - data;
data = endptr;
len = bfd_getl16 (data) + sizeof (uint16_t);
data += len;
size -= len;
continue;
}
name_len =
strnlen (proc->name, len - offsetof (struct procsym, name));
if (name_len == len - offsetof (struct procsym, name))
{
einfo (_("%P: warning: name for S_GPROC32/S_LPROC32 has no"
" terminating zero\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (type == S_GPROC32_ID || type == S_LPROC32_ID)
{
/* Transform into S_GPROC32 / S_LPROC32. */
uint32_t t_idx = bfd_getl32 (&proc->type);
struct type_entry *t;
uint16_t t_type;
if (t_idx < TPI_FIRST_INDEX
|| t_idx >= TPI_FIRST_INDEX + num_types)
{
einfo (_("%P: CodeView symbol references out of range"
" type %v\n"), type);
bfd_set_error (bfd_error_bad_value);
return false;
}
t = map[t_idx - TPI_FIRST_INDEX];
t_type = bfd_getl16 (t->data + sizeof (uint16_t));
switch (t_type)
{
case LF_FUNC_ID:
{
struct lf_func_id *t_data =
(struct lf_func_id *) t->data;
/* Replace proc->type with function type. */
memcpy (&proc->type, &t_data->function_type,
sizeof (uint32_t));
break;
}
case LF_MFUNC_ID:
{
struct lf_mfunc_id *t_data =
(struct lf_mfunc_id *) t->data;
/* Replace proc->type with function type. */
memcpy (&proc->type, &t_data->function_type,
sizeof (uint32_t));
break;
}
default:
einfo (_("%P: CodeView S_GPROC32_ID/S_LPROC32_ID symbol"
" referenced unknown type as ID\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
/* Change record type. */
if (type == S_GPROC32_ID)
bfd_putl32 (S_GPROC32, &proc->kind);
else
bfd_putl32 (S_LPROC32, &proc->kind);
}
else
{
if (!remap_symbol_type (&proc->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
}
end = *buf - orig_buf + sizeof (uint32_t) + endptr - data;
bfd_putl32 (end, &proc->end);
/* Add S_PROCREF / S_LPROCREF to globals stream. */
ref_size = offsetof (struct refsym, name) + name_len + 1;
if (ref_size % sizeof (uint32_t))
padding = sizeof (uint32_t) - (ref_size % sizeof (uint32_t));
else
padding = 0;
ref = xmalloc (ref_size + padding);
bfd_putl16 (ref_size + padding - sizeof (uint16_t), &ref->size);
bfd_putl16 (type == S_GPROC32 || type == S_GPROC32_ID ?
S_PROCREF : S_LPROCREF, &ref->kind);
bfd_putl32 (0, &ref->sum_name);
bfd_putl32 (*buf - orig_buf + sizeof (uint32_t),
&ref->symbol_offset);
bfd_putl16 (mod_num + 1, &ref->mod);
memcpy (ref->name, proc->name, name_len + 1);
memset (ref->name + name_len + 1, 0, padding);
if (!add_globals_ref (glob, sym_rec_stream, proc->name, name_len,
(uint8_t *) ref, ref_size + padding))
{
free (ref);
return false;
}
free (ref);
scope = *buf;
memcpy (*buf, proc, len);
*buf += len;
scope_level++;
break;
}
case S_UDT:
{
struct udtsym *udt = (struct udtsym *) data;
size_t name_len;
if (len < offsetof (struct udtsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_UDT\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
name_len =
strnlen (udt->name, len - offsetof (struct udtsym, name));
if (name_len == len - offsetof (struct udtsym, name))
{
einfo (_("%P: warning: name for S_UDT has no"
" terminating zero\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&udt->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
/* S_UDT goes in the symbols stream if within a procedure,
otherwise it goes in the globals stream. */
if (scope_level == 0)
{
if (!add_globals_ref (glob, sym_rec_stream, udt->name,
name_len, data, len))
return false;
}
else
{
memcpy (*buf, udt, len);
*buf += len;
}
break;
}
case S_CONSTANT:
{
struct constsym *c = (struct constsym *) data;
size_t name_len, rec_size;
uint16_t val;
if (len < offsetof (struct constsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_CONSTANT\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
rec_size = offsetof (struct constsym, name);
val = bfd_getl16 (&c->value);
/* If val >= 0x8000, actual value follows. */
if (val >= 0x8000)
{
unsigned int param_len = extended_value_len (val);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" S_CONSTANT\n"), val);
bfd_set_error (bfd_error_bad_value);
return false;
}
rec_size += param_len;
}
name_len =
strnlen ((const char *) data + rec_size, len - rec_size);
if (name_len == len - rec_size)
{
einfo (_("%P: warning: name for S_CONSTANT has no"
" terminating zero\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&c->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!add_globals_ref (glob, sym_rec_stream,
(const char *) data + rec_size, name_len,
data, len))
return false;
break;
}
case S_END:
case S_INLINESITE_END:
case S_PROC_ID_END:
memcpy (*buf, data, len);
if (type == S_PROC_ID_END) /* transform to S_END */
bfd_putl16 (S_END, *buf + sizeof (uint16_t));
/* Reset scope variable back to the address of the previous
scope start. */
if (scope)
{
uint32_t parent;
uint16_t scope_start_type =
bfd_getl16 (scope + sizeof (uint16_t));
switch (scope_start_type)
{
case S_GPROC32:
case S_LPROC32:
parent = bfd_getl32 (scope + offsetof (struct procsym,
parent));
break;
case S_BLOCK32:
parent = bfd_getl32 (scope + offsetof (struct blocksym,
parent));
break;
case S_INLINESITE:
parent = bfd_getl32 (scope + offsetof (struct inline_site,
parent));
break;
case S_THUNK32:
parent = bfd_getl32 (scope + offsetof (struct thunk,
parent));
break;
default:
einfo (_("%P: warning: unexpected CodeView scope start"
" record %v\n"), scope_start_type);
bfd_set_error (bfd_error_bad_value);
return false;
}
if (parent == 0)
scope = NULL;
else
scope = orig_buf + parent - sizeof (uint32_t);
}
*buf += len;
scope_level--;
break;
case S_BUILDINFO:
{
struct buildinfosym *bi = (struct buildinfosym *) data;
if (len < sizeof (struct buildinfosym))
{
einfo (_("%P: warning: truncated CodeView record"
" S_BUILDINFO\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&bi->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
memcpy (*buf, data, len);
*buf += len;
break;
}
case S_BLOCK32:
{
struct blocksym *bl = (struct blocksym *) data;
uint8_t *endptr;
uint32_t end;
if (len < offsetof (struct blocksym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_BLOCK32\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
bfd_putl32 (scope - orig_buf + sizeof (uint32_t), &bl->parent);
endptr = find_end_of_scope (data, size);
if (!endptr)
{
einfo (_("%P: warning: could not find end of"
" S_BLOCK32 record\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
end = *buf - orig_buf + sizeof (uint32_t) + endptr - data;
bfd_putl32 (end, &bl->end);
scope = *buf;
memcpy (*buf, data, len);
*buf += len;
scope_level++;
break;
}
case S_BPREL32:
{
struct bprelsym *bp = (struct bprelsym *) data;
if (len < offsetof (struct bprelsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_BPREL32\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&bp->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
memcpy (*buf, data, len);
*buf += len;
break;
}
case S_REGISTER:
{
struct regsym *reg = (struct regsym *) data;
if (len < offsetof (struct regsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_REGISTER\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&reg->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
memcpy (*buf, data, len);
*buf += len;
break;
}
case S_REGREL32:
{
struct regrel *rr = (struct regrel *) data;
if (len < offsetof (struct regrel, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_REGREL32\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&rr->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
memcpy (*buf, data, len);
*buf += len;
break;
}
case S_LOCAL:
{
struct localsym *l = (struct localsym *) data;
if (len < offsetof (struct localsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_LOCAL\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&l->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
memcpy (*buf, data, len);
*buf += len;
break;
}
case S_INLINESITE:
{
struct inline_site *is = (struct inline_site *) data;
uint8_t *endptr;
uint32_t end;
if (len < offsetof (struct inline_site, binary_annotations))
{
einfo (_("%P: warning: truncated CodeView record"
" S_INLINESITE\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
bfd_putl32 (scope - orig_buf + sizeof (uint32_t), &is->parent);
endptr = find_end_of_scope (data, size);
if (!endptr)
{
einfo (_("%P: warning: could not find end of"
" S_INLINESITE record\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
end = *buf - orig_buf + sizeof (uint32_t) + endptr - data;
bfd_putl32 (end, &is->end);
if (!remap_symbol_type (&is->inlinee, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
scope = *buf;
memcpy (*buf, data, len);
*buf += len;
scope_level++;
break;
}
case S_THUNK32:
{
struct thunk *th = (struct thunk *) data;
uint8_t *endptr;
uint32_t end;
if (len < offsetof (struct thunk, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_THUNK32\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
bfd_putl32 (scope - orig_buf + sizeof (uint32_t), &th->parent);
endptr = find_end_of_scope (data, size);
if (!endptr)
{
einfo (_("%P: warning: could not find end of"
" S_THUNK32 record\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
end = *buf - orig_buf + sizeof (uint32_t) + endptr - data;
bfd_putl32 (end, &th->end);
scope = *buf;
memcpy (*buf, data, len);
*buf += len;
scope_level++;
break;
}
case S_HEAPALLOCSITE:
{
struct heap_alloc_site *has = (struct heap_alloc_site *) data;
if (len < sizeof (struct heap_alloc_site))
{
einfo (_("%P: warning: truncated CodeView record"
" S_HEAPALLOCSITE\n"));
bfd_set_error (bfd_error_bad_value);
return false;
}
if (!remap_symbol_type (&has->type, map, num_types))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
memcpy (*buf, data, len);
*buf += len;
break;
}
case S_OBJNAME: /* just copy */
case S_COMPILE3:
case S_UNAMESPACE:
case S_FRAMEPROC:
case S_FRAMECOOKIE:
case S_LABEL32:
case S_DEFRANGE_REGISTER_REL:
case S_DEFRANGE_FRAMEPOINTER_REL:
case S_DEFRANGE_SUBFIELD_REGISTER:
case S_DEFRANGE_FRAMEPOINTER_REL_FULL_SCOPE:
case S_DEFRANGE_REGISTER:
memcpy (*buf, data, len);
*buf += len;
break;
default:
einfo (_("%P: warning: unrecognized CodeView record %v\n"), type);
bfd_set_error (bfd_error_bad_value);
return false;
}
data += len;
size -= len;
}
return true;
}
/* For a given symbol subsection, work out how much space to allocate in the
result module stream. This is different because we don't copy certain
symbols, such as S_CONSTANT, and we skip over any procedures or data that
have been GC'd out. */
static bool
calculate_symbols_size (uint8_t *data, uint32_t size, uint32_t *sym_size)
{
unsigned int scope_level = 0;
while (size >= sizeof (uint32_t))
{
uint16_t len = bfd_getl16 (data) + sizeof (uint16_t);
uint16_t type = bfd_getl16 (data + sizeof (uint16_t));
switch (type)
{
case S_LDATA32:
case S_LTHREAD32:
{
struct datasym *d = (struct datasym *) data;
uint16_t section;
if (len < offsetof (struct datasym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_LDATA32/S_LTHREAD32\n"));
return false;
}
section = bfd_getl16 (&d->section);
/* copy if not GC'd or within function */
if (scope_level != 0 || section != 0)
*sym_size += len;
}
case S_GDATA32:
case S_GTHREAD32:
case S_CONSTANT:
/* Not copied into symbols stream. */
break;
case S_GPROC32:
case S_LPROC32:
case S_GPROC32_ID:
case S_LPROC32_ID:
{
struct procsym *proc = (struct procsym *) data;
uint16_t section;
if (len < offsetof (struct procsym, name))
{
einfo (_("%P: warning: truncated CodeView record"
" S_GPROC32/S_LPROC32\n"));
return false;
}
section = bfd_getl16 (&proc->section);
if (section != 0)
{
*sym_size += len;
}
else
{
uint8_t *endptr = find_end_of_scope (data, size);
if (!endptr)
{
einfo (_("%P: warning: could not find end of"
" S_GPROC32/S_LPROC32 record\n"));
return false;
}
/* Skip to after S_END. */
size -= endptr - data;
data = endptr;
len = bfd_getl16 (data) + sizeof (uint16_t);
data += len;
size -= len;
continue;
}
scope_level++;
break;
}
case S_UDT:
if (scope_level != 0) /* only goes in symbols if local */
*sym_size += len;
break;
case S_BLOCK32: /* always copied */
case S_INLINESITE:
case S_THUNK32:
*sym_size += len;
scope_level++;
break;
case S_END: /* always copied */
case S_PROC_ID_END:
case S_INLINESITE_END:
*sym_size += len;
scope_level--;
break;
case S_OBJNAME: /* always copied */
case S_COMPILE3:
case S_UNAMESPACE:
case S_FRAMEPROC:
case S_FRAMECOOKIE:
case S_LABEL32:
case S_BUILDINFO:
case S_BPREL32:
case S_REGISTER:
case S_REGREL32:
case S_LOCAL:
case S_DEFRANGE_REGISTER_REL:
case S_DEFRANGE_FRAMEPOINTER_REL:
case S_DEFRANGE_SUBFIELD_REGISTER:
case S_DEFRANGE_FRAMEPOINTER_REL_FULL_SCOPE:
case S_DEFRANGE_REGISTER:
case S_HEAPALLOCSITE:
*sym_size += len;
break;
default:
einfo (_("%P: warning: unrecognized CodeView record %v\n"), type);
return false;
}
data += len;
size -= len;
}
return true;
}
/* Parse the DEBUG_S_INLINEELINES data, which records the line numbers that
correspond to inlined functions. This is similar to DEBUG_S_LINES (see
handle_debugs_section), but rather than just copying we also need to remap
the numbers of the referenced LF_FUNC_ID types. */
static bool
parse_inlinee_lines (uint8_t *data, uint32_t size, uint8_t **bufptr,
struct type_entry **map, uint32_t num_types)
{
uint32_t version;
uint8_t *ptr;
unsigned int num_entries;
bfd_putl32 (DEBUG_S_INLINEELINES, *bufptr);
*bufptr += sizeof (uint32_t);
bfd_putl32 (size, *bufptr);
*bufptr += sizeof (uint32_t);
/* The inlinee lines data consists of a version uint32_t (0), followed by an
array of struct inlinee_source_line:
struct inlinee_source_line
{
uint32_t function_id;
uint32_t file_id;
uint32_t line_no;
};
(see InlineeSourceLine in cvinfo.h)
We're only interested here in the function_id, as we need to remap its
type number.
*/
if (size < sizeof (uint32_t))
{
einfo (_("%P: warning: truncated DEBUG_S_INLINEELINES data\n"));
return false;
}
version = bfd_getl32 (data + sizeof (uint32_t) + sizeof (uint32_t));
if (version != CV_INLINEE_SOURCE_LINE_SIGNATURE)
{
einfo (_("%P: warning: unexpected DEBUG_S_INLINEELINES version %u\n"),
version);
return false;
}
memcpy (*bufptr, data, size);
ptr = *bufptr + sizeof (uint32_t);
*bufptr += size;
num_entries = (size - sizeof (uint32_t)) / (3 * sizeof (uint32_t));
for (unsigned int i = 0; i < num_entries; i++)
{
uint32_t func_id;
func_id = bfd_getl32 (ptr);
if (!remap_type (ptr, map, func_id, num_types))
return false;
ptr += 3 * sizeof (uint32_t);
}
return true;
}
/* Parse the .debug$S section within an object file. */
static bool
handle_debugs_section (asection *s, bfd *mod, struct string_table *strings,
uint8_t **dataptr, uint32_t *sizeptr,
struct mod_source_files *mod_source,
bfd *abfd, uint8_t **syms, uint32_t *sym_byte_size,
struct type_entry **map, uint32_t num_types,
bfd *sym_rec_stream, struct globals *glob,
uint16_t mod_num)
{
bfd_byte *data = NULL;
size_t off;
uint32_t c13_size = 0;
char *string_table = NULL;
uint8_t *buf, *bufptr, *symbuf, *symbufptr;
uint32_t sym_size = 0;
if (!bfd_get_full_section_contents (mod, s, &data))
return false;
if (!data)
return false;
/* Resolve relocations. Addresses are stored within the .debug$S section as
a .secidx, .secrel32 pair. */
if (s->flags & SEC_RELOC)
{
struct internal_reloc *relocs;
struct internal_syment *symbols;
asection **sectlist;
unsigned int syment_count;
int sect_num;
struct external_syment *ext;
syment_count = obj_raw_syment_count (mod);
relocs =
_bfd_coff_read_internal_relocs (mod, s, false, NULL, true, NULL);
symbols = xmalloc (sizeof (struct internal_syment) * syment_count);
sectlist = xmalloc (sizeof (asection *) * syment_count);
ext = (struct external_syment *) (coff_data (mod)->external_syms);
for (unsigned int i = 0; i < syment_count; i++)
{
bfd_coff_swap_sym_in (mod, &ext[i], &symbols[i]);
}
sect_num = 1;
for (asection *sect = mod->sections; sect; sect = sect->next)
{
for (unsigned int i = 0; i < syment_count; i++)
{
if (symbols[i].n_scnum == sect_num)
sectlist[i] = sect;
}
sect_num++;
}
if (!bfd_coff_relocate_section (abfd, coff_data (abfd)->link_info, mod,
s, data, relocs, symbols, sectlist))
{
free (sectlist);
free (symbols);
free (data);
return false;
}
free (sectlist);
free (symbols);
}
if (bfd_getl32 (data) != CV_SIGNATURE_C13)
{
free (data);
return true;
}
off = sizeof (uint32_t);
/* calculate size */
while (off + sizeof (uint32_t) <= s->size)
{
uint32_t type, size;
type = bfd_getl32 (data + off);
off += sizeof (uint32_t);
if (off + sizeof (uint32_t) > s->size)
{
free (data);
bfd_set_error (bfd_error_bad_value);
return false;
}
size = bfd_getl32 (data + off);
off += sizeof (uint32_t);
if (off + size > s->size)
{
free (data);
bfd_set_error (bfd_error_bad_value);
return false;
}
switch (type)
{
case DEBUG_S_FILECHKSMS:
case DEBUG_S_INLINEELINES:
c13_size += sizeof (uint32_t) + sizeof (uint32_t) + size;
if (c13_size % sizeof (uint32_t))
c13_size += sizeof (uint32_t) - (c13_size % sizeof (uint32_t));
break;
case DEBUG_S_STRINGTABLE:
parse_string_table (data + off, size, strings);
string_table = (char *) data + off;
break;
case DEBUG_S_LINES:
{
uint16_t sect;
if (size < sizeof (uint32_t) + sizeof (uint16_t))
{
free (data);
bfd_set_error (bfd_error_bad_value);
return false;
}
sect = bfd_getl16 (data + off + sizeof (uint32_t));
/* Skip GC'd symbols. */
if (sect != 0)
{
c13_size += sizeof (uint32_t) + sizeof (uint32_t) + size;
if (c13_size % sizeof (uint32_t))
c13_size +=
sizeof (uint32_t) - (c13_size % sizeof (uint32_t));
}
break;
}
case DEBUG_S_SYMBOLS:
if (!calculate_symbols_size (data + off, size, &sym_size))
{
free (data);
bfd_set_error (bfd_error_bad_value);
return false;
}
break;
}
off += size;
if (off % sizeof (uint32_t))
off += sizeof (uint32_t) - (off % sizeof (uint32_t));
}
if (sym_size % sizeof (uint32_t))
sym_size += sizeof (uint32_t) - (sym_size % sizeof (uint32_t));
if (c13_size == 0 && sym_size == 0)
{
free (data);
return true;
}
/* copy data */
buf = NULL;
if (c13_size != 0)
buf = xmalloc (c13_size);
bufptr = buf;
symbuf = NULL;
if (sym_size != 0)
symbuf = xmalloc (sym_size);
symbufptr = symbuf;
off = sizeof (uint32_t);
while (off + sizeof (uint32_t) <= s->size)
{
uint32_t type, size;
type = bfd_getl32 (data + off);
off += sizeof (uint32_t);
size = bfd_getl32 (data + off);
off += sizeof (uint32_t);
switch (type)
{
case DEBUG_S_FILECHKSMS:
if (!copy_filechksms (data + off, size, string_table,
strings, bufptr, mod_source))
{
free (data);
free (symbuf);
return false;
}
bufptr += sizeof (uint32_t) + sizeof (uint32_t) + size;
break;
case DEBUG_S_LINES:
{
uint16_t sect;
sect = bfd_getl16 (data + off + sizeof (uint32_t));
/* Skip if GC'd. */
if (sect != 0)
{
bfd_putl32 (type, bufptr);
bufptr += sizeof (uint32_t);
bfd_putl32 (size, bufptr);
bufptr += sizeof (uint32_t);
memcpy (bufptr, data + off, size);
bufptr += size;
}
break;
}
case DEBUG_S_SYMBOLS:
if (!parse_symbols (data + off, size, &symbufptr, map, num_types,
sym_rec_stream, glob, mod_num))
{
free (data);
free (symbuf);
return false;
}
break;
case DEBUG_S_INLINEELINES:
if (!parse_inlinee_lines (data + off, size, &bufptr, map, num_types))
{
free (data);
free (symbuf);
return false;
}
break;
}
off += size;
if (off % sizeof (uint32_t))
off += sizeof (uint32_t) - (off % sizeof (uint32_t));
}
free (data);
if (buf)
{
if (*dataptr)
{
/* Append the C13 info to what's already there, if the module has
multiple .debug$S sections. */
*dataptr = xrealloc (*dataptr, *sizeptr + c13_size);
memcpy (*dataptr + *sizeptr, buf, c13_size);
free (buf);
}
else
{
*dataptr = buf;
}
*sizeptr += c13_size;
}
if (symbuf)
{
if (*syms)
{
*syms = xrealloc (*syms, *sym_byte_size + sym_size);
memcpy (*syms + *sym_byte_size, symbuf, sym_size);
free (symbuf);
}
else
{
*syms = symbuf;
}
*sym_byte_size += sym_size;
}
return true;
}
/* Remap the type number stored in data from the per-module numbering to
that of the deduplicated output list. */
static bool
remap_type (void *data, struct type_entry **map,
uint32_t type_num, uint32_t num_types)
{
uint32_t type = bfd_getl32 (data);
/* Ignore builtin types (those with IDs below 0x1000). */
if (type < TPI_FIRST_INDEX)
return true;
if (type >= TPI_FIRST_INDEX + type_num)
{
einfo (_("%P: CodeView type %v references other type %v not yet "
"declared\n"), TPI_FIRST_INDEX + type_num, type);
return false;
}
if (type >= TPI_FIRST_INDEX + num_types)
{
einfo (_("%P: CodeView type %v references out of range type %v\n"),
TPI_FIRST_INDEX + type_num, type);
return false;
}
type = TPI_FIRST_INDEX + map[type - TPI_FIRST_INDEX]->index;
bfd_putl32 (type, data);
return true;
}
/* Determines whether the name of a struct, class, or union counts as
"anonymous". Non-anonymous types have a hash based on just the name,
rather than the whole structure. */
static bool
is_name_anonymous (char *name, size_t len)
{
static const char tag1[] = "<unnamed-tag>";
static const char tag2[] = "__unnamed";
static const char tag3[] = "::<unnamed-tag>";
static const char tag4[] = "::__unnamed";
if (len == sizeof (tag1) - 1 && !memcmp (name, tag1, sizeof (tag1) - 1))
return true;
if (len == sizeof (tag2) - 1 && !memcmp (name, tag2, sizeof (tag2) - 1))
return true;
if (len >= sizeof (tag3) - 1
&& !memcmp (name + len - sizeof (tag3) + 1, tag3, sizeof (tag3) - 1))
return true;
if (len >= sizeof (tag4) - 1
&& !memcmp (name + len - sizeof (tag4) + 1, tag4, sizeof (tag4) - 1))
return true;
return false;
}
/* Handle LF_UDT_SRC_LINE type entries, which are a special case. These
give the source file and line number for each user-defined type that is
declared. We parse these and emit instead an LF_UDT_MOD_SRC_LINE entry,
which also includes the module number. */
static bool
handle_udt_src_line (uint8_t *data, uint16_t size, struct type_entry **map,
uint32_t type_num, uint32_t num_types,
struct types *ids, uint16_t mod_num,
struct string_table *strings)
{
struct lf_udt_src_line *usl = (struct lf_udt_src_line *) data;
uint32_t orig_type, source_file_type;
void **slot;
hashval_t hash;
struct type_entry *e, *type_e, *str_e;
struct lf_udt_mod_src_line *umsl;
struct lf_string_id *str;
uint32_t source_file_offset;
if (size < sizeof (struct lf_udt_src_line))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_UDT_SRC_LINE\n"));
return false;
}
/* Check if LF_UDT_MOD_SRC_LINE already present for type, and return. */
orig_type = bfd_getl32 (&usl->type);
if (orig_type < TPI_FIRST_INDEX ||
orig_type >= TPI_FIRST_INDEX + num_types ||
!map[orig_type - TPI_FIRST_INDEX])
{
einfo (_("%P: warning: CodeView type record LF_UDT_SRC_LINE"
" referred to unknown type %v\n"), orig_type);
return false;
}
type_e = map[orig_type - TPI_FIRST_INDEX];
/* Skip if type already declared in other module. */
if (type_e->has_udt_src_line)
return true;
if (!remap_type (&usl->type, map, type_num, num_types))
return false;
/* Extract string from source_file_type. */
source_file_type = bfd_getl32 (&usl->source_file_type);
if (source_file_type < TPI_FIRST_INDEX ||
source_file_type >= TPI_FIRST_INDEX + num_types ||
!map[source_file_type - TPI_FIRST_INDEX])
{
einfo (_("%P: warning: CodeView type record LF_UDT_SRC_LINE"
" referred to unknown string %v\n"), source_file_type);
return false;
}
str_e = map[source_file_type - TPI_FIRST_INDEX];
if (bfd_getl16 (str_e->data + sizeof (uint16_t)) != LF_STRING_ID)
{
einfo (_("%P: warning: CodeView type record LF_UDT_SRC_LINE"
" pointed to unexpected record type\n"));
return false;
}
str = (struct lf_string_id *) str_e->data;
/* Add string to string table. */
source_file_offset = add_string (str->string, strlen (str->string),
strings);
/* Add LF_UDT_MOD_SRC_LINE entry. */
size = sizeof (struct lf_udt_mod_src_line);
e = xmalloc (offsetof (struct type_entry, data) + size);
e->next = NULL;
e->index = ids->num_types;
e->has_udt_src_line = false;
/* LF_UDT_MOD_SRC_LINE use calc_hash on the type number, rather than
the crc32 used for type hashes elsewhere. */
e->cv_hash = calc_hash ((char *) &usl->type, sizeof (uint32_t));
type_e->has_udt_src_line = true;
umsl = (struct lf_udt_mod_src_line *) e->data;
bfd_putl16 (size - sizeof (uint16_t), &umsl->size);
bfd_putl16 (LF_UDT_MOD_SRC_LINE, &umsl->kind);
memcpy (&umsl->type, &usl->type, sizeof (uint32_t));
bfd_putl32 (source_file_offset, &umsl->source_file_string);
memcpy (&umsl->line_no, &usl->line_no, sizeof (uint32_t));
bfd_putl16 (mod_num + 1, &umsl->module_no);
hash = iterative_hash (e->data, size, 0);
slot = htab_find_slot_with_hash (ids->hashmap, data, hash, INSERT);
if (!slot)
{
free (e);
return false;
}
if (*slot)
{
free (e);
einfo (_("%P: warning: duplicate CodeView type record "
"LF_UDT_MOD_SRC_LINE\n"));
return false;
}
*slot = e;
if (ids->last)
ids->last->next = e;
else
ids->first = e;
ids->last = e;
map[type_num] = e;
ids->num_types++;
return true;
}
/* Parse a type definition in the .debug$T section. We remap the numbers
of any referenced types, and if the type is not a duplicate of one
already seen add it to types (for TPI types) or ids (for IPI types). */
static bool
handle_type (uint8_t *data, struct type_entry **map, uint32_t type_num,
uint32_t num_types, struct types *types,
struct types *ids, uint16_t mod_num,
struct string_table *strings)
{
uint16_t size, type;
void **slot;
hashval_t hash;
bool other_hash = false;
uint32_t cv_hash;
struct types *t;
bool ipi = false;
size = bfd_getl16 (data) + sizeof (uint16_t);
type = bfd_getl16 (data + sizeof (uint16_t));
switch (type)
{
case LF_MODIFIER:
{
struct lf_modifier *mod = (struct lf_modifier *) data;
if (size < offsetof (struct lf_modifier, modifier))
{
einfo (_("%P: warning: truncated CodeView type record "
"LF_MODIFIER\n"));
return false;
}
if (!remap_type (&mod->base_type, map, type_num, num_types))
return false;
break;
}
case LF_POINTER:
{
struct lf_pointer *ptr = (struct lf_pointer *) data;
uint32_t attributes;
if (size < offsetof (struct lf_pointer, attributes))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_POINTER\n"));
return false;
}
if (!remap_type (&ptr->base_type, map, type_num, num_types))
return false;
attributes = bfd_getl32 (&ptr->attributes);
if ((attributes & CV_PTR_MODE_MASK) == CV_PTR_MODE_PMEM
|| (attributes & CV_PTR_MODE_MASK) == CV_PTR_MODE_PMFUNC)
{
if (size < offsetof (struct lf_pointer, ptr_to_mem_type))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_POINTER\n"));
return false;
}
if (!remap_type (&ptr->containing_class, map, type_num, num_types))
return false;
}
break;
}
case LF_PROCEDURE:
{
struct lf_procedure *proc = (struct lf_procedure *) data;
if (size < sizeof (struct lf_procedure))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_PROCEDURE\n"));
return false;
}
if (!remap_type (&proc->return_type, map, type_num, num_types))
return false;
if (!remap_type (&proc->arglist, map, type_num, num_types))
return false;
break;
}
case LF_MFUNCTION:
{
struct lf_mfunction *func = (struct lf_mfunction *) data;
if (size < sizeof (struct lf_procedure))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_MFUNCTION\n"));
return false;
}
if (!remap_type (&func->return_type, map, type_num, num_types))
return false;
if (!remap_type (&func->containing_class_type, map, type_num,
num_types))
return false;
if (!remap_type (&func->this_type, map, type_num, num_types))
return false;
if (!remap_type (&func->arglist, map, type_num, num_types))
return false;
break;
}
case LF_ARGLIST:
{
uint32_t num_entries;
struct lf_arglist *al = (struct lf_arglist *) data;
if (size < offsetof (struct lf_arglist, args))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ARGLIST\n"));
return false;
}
num_entries = bfd_getl32 (&al->num_entries);
if (size < offsetof (struct lf_arglist, args)
+ (num_entries * sizeof (uint32_t)))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ARGLIST\n"));
return false;
}
for (uint32_t i = 0; i < num_entries; i++)
{
if (!remap_type (&al->args[i], map, type_num, num_types))
return false;
}
break;
}
case LF_FIELDLIST:
{
uint16_t left = size - sizeof (uint16_t) - sizeof (uint16_t);
uint8_t *ptr = data + sizeof (uint16_t) + sizeof (uint16_t);
while (left > 0)
{
uint16_t subtype;
if (left < sizeof (uint16_t))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FIELDLIST\n"));
return false;
}
subtype = bfd_getl16 (ptr);
switch (subtype)
{
case LF_MEMBER:
{
struct lf_member *mem = (struct lf_member *) ptr;
uint16_t offset;
size_t name_len, subtype_len;
if (left < offsetof (struct lf_member, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_MEMBER\n"));
return false;
}
if (!remap_type (&mem->type, map, type_num, num_types))
return false;
subtype_len = offsetof (struct lf_member, name);
offset = bfd_getl16 (&mem->offset);
/* If offset >= 0x8000, actual value follows. */
if (offset >= 0x8000)
{
unsigned int param_len = extended_value_len (offset);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_MEMBER\n"), offset);
return false;
}
subtype_len += param_len;
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_MEMBER\n"));
return false;
}
}
name_len =
strnlen ((char *) mem + subtype_len, left - subtype_len);
if (name_len == left - offsetof (struct lf_member, name))
{
einfo (_("%P: warning: name for LF_MEMBER has no"
" terminating zero\n"));
return false;
}
name_len++;
subtype_len += name_len;
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FIELDLIST\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_ENUMERATE:
{
struct lf_enumerate *en = (struct lf_enumerate *) ptr;
size_t name_len, subtype_len;
uint16_t val;
if (left < offsetof (struct lf_enumerate, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ENUMERATE\n"));
return false;
}
subtype_len = offsetof (struct lf_enumerate, name);
val = bfd_getl16 (&en->value);
/* If val >= 0x8000, the actual value immediately follows. */
if (val >= 0x8000)
{
unsigned int param_len = extended_value_len (val);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_ENUMERATE\n"), val);
return false;
}
if (left < subtype_len + param_len)
{
einfo (_("%P: warning: truncated CodeView type"
" record LF_ENUMERATE\n"));
return false;
}
subtype_len += param_len;
}
name_len = strnlen ((char *) ptr + subtype_len,
left - subtype_len);
if (name_len == left - offsetof (struct lf_enumerate, name))
{
einfo (_("%P: warning: name for LF_ENUMERATE has no"
" terminating zero\n"));
return false;
}
name_len++;
subtype_len += name_len;
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ENUMERATE\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_INDEX:
{
struct lf_index *ind = (struct lf_index *) ptr;
if (left < sizeof (struct lf_index))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_INDEX\n"));
return false;
}
if (!remap_type (&ind->index, map, type_num, num_types))
return false;
ptr += sizeof (struct lf_index);
left -= sizeof (struct lf_index);
break;
}
case LF_ONEMETHOD:
{
struct lf_onemethod *meth = (struct lf_onemethod *) ptr;
size_t name_len, subtype_len;
if (left < offsetof (struct lf_onemethod, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ONEMETHOD\n"));
return false;
}
if (!remap_type (&meth->method_type, map, type_num,
num_types))
return false;
name_len =
strnlen (meth->name,
left - offsetof (struct lf_onemethod, name));
if (name_len == left - offsetof (struct lf_onemethod, name))
{
einfo (_("%P: warning: name for LF_ONEMETHOD has no"
" terminating zero\n"));
return false;
}
name_len++;
subtype_len = offsetof (struct lf_onemethod, name)
+ name_len;
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FIELDLIST\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_METHOD:
{
struct lf_method *meth = (struct lf_method *) ptr;
size_t name_len, subtype_len;
if (left < offsetof (struct lf_method, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_METHOD\n"));
return false;
}
if (!remap_type (&meth->method_list, map, type_num,
num_types))
return false;
name_len =
strnlen (meth->name,
left - offsetof (struct lf_method, name));
if (name_len == left - offsetof (struct lf_method, name))
{
einfo (_("%P: warning: name for LF_METHOD has no"
" terminating zero\n"));
return false;
}
name_len++;
subtype_len = offsetof (struct lf_method, name) + name_len;
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FIELDLIST\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_BCLASS:
{
struct lf_bclass *bc = (struct lf_bclass *) ptr;
size_t subtype_len;
uint16_t offset;
if (left < sizeof (struct lf_bclass))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_BCLASS\n"));
return false;
}
if (!remap_type (&bc->base_class_type, map, type_num,
num_types))
return false;
subtype_len = sizeof (struct lf_bclass);
offset = bfd_getl16 (&bc->offset);
/* If offset >= 0x8000, actual value follows. */
if (offset >= 0x8000)
{
unsigned int param_len = extended_value_len (offset);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_BCLASS\n"), offset);
return false;
}
subtype_len += param_len;
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_BCLASS\n"));
return false;
}
}
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_BCLASS\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_VFUNCTAB:
{
struct lf_vfunctab *vft = (struct lf_vfunctab *) ptr;
if (left < sizeof (struct lf_vfunctab))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_VFUNCTAB\n"));
return false;
}
if (!remap_type (&vft->type, map, type_num, num_types))
return false;
ptr += sizeof (struct lf_vfunctab);
left -= sizeof (struct lf_vfunctab);
break;
}
case LF_VBCLASS:
case LF_IVBCLASS:
{
struct lf_vbclass *vbc = (struct lf_vbclass *) ptr;
size_t subtype_len;
uint16_t offset;
if (left < sizeof (struct lf_vbclass))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_VBCLASS/LF_IVBCLASS\n"));
return false;
}
if (!remap_type (&vbc->base_class_type, map, type_num,
num_types))
return false;
if (!remap_type (&vbc->virtual_base_pointer_type, map,
type_num, num_types))
return false;
subtype_len = offsetof (struct lf_vbclass,
virtual_base_vbtable_offset);
offset = bfd_getl16 (&vbc->virtual_base_pointer_offset);
/* If offset >= 0x8000, actual value follows. */
if (offset >= 0x8000)
{
unsigned int param_len = extended_value_len (offset);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_VBCLASS/LF_IVBCLASS\n"), offset);
return false;
}
subtype_len += param_len;
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_VBCLASS/LF_IVBCLASS\n"));
return false;
}
}
offset = bfd_getl16 ((char *)vbc + subtype_len);
subtype_len += sizeof (uint16_t);
/* If offset >= 0x8000, actual value follows. */
if (offset >= 0x8000)
{
unsigned int param_len = extended_value_len (offset);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_VBCLASS/LF_IVBCLASS\n"), offset);
return false;
}
subtype_len += param_len;
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_VBCLASS/LF_IVBCLASS\n"));
return false;
}
}
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_VBCLASS/LF_IVBCLASS\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_STMEMBER:
{
struct lf_static_member *st =
(struct lf_static_member *) ptr;
size_t name_len, subtype_len;
if (left < offsetof (struct lf_static_member, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_STMEMBER\n"));
return false;
}
if (!remap_type (&st->type, map, type_num, num_types))
return false;
name_len =
strnlen (st->name,
left - offsetof (struct lf_static_member, name));
if (name_len == left
- offsetof (struct lf_static_member, name))
{
einfo (_("%P: warning: name for LF_STMEMBER has no"
" terminating zero\n"));
return false;
}
name_len++;
subtype_len = offsetof (struct lf_static_member, name)
+ name_len;
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FIELDLIST\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
case LF_NESTTYPE:
{
struct lf_nest_type *nest = (struct lf_nest_type *) ptr;
size_t name_len, subtype_len;
if (left < offsetof (struct lf_nest_type, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_NESTTYPE\n"));
return false;
}
if (!remap_type (&nest->type, map, type_num, num_types))
return false;
name_len =
strnlen (nest->name,
left - offsetof (struct lf_nest_type, name));
if (name_len == left - offsetof (struct lf_nest_type, name))
{
einfo (_("%P: warning: name for LF_NESTTYPE has no"
" terminating zero\n"));
return false;
}
name_len++;
subtype_len = offsetof (struct lf_nest_type, name)
+ name_len;
if (subtype_len % 4 != 0)
subtype_len += 4 - (subtype_len % 4);
if (left < subtype_len)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FIELDLIST\n"));
return false;
}
ptr += subtype_len;
left -= subtype_len;
break;
}
default:
einfo (_("%P: warning: unrecognized CodeView subtype %v\n"),
subtype);
return false;
}
}
break;
}
case LF_BITFIELD:
{
struct lf_bitfield *bf = (struct lf_bitfield *) data;
if (size < offsetof (struct lf_bitfield, length))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_BITFIELD\n"));
return false;
}
if (!remap_type (&bf->base_type, map, type_num, num_types))
return false;
break;
}
case LF_METHODLIST:
{
struct lf_methodlist *ml = (struct lf_methodlist *) data;
unsigned int num_entries;
if (size < offsetof (struct lf_methodlist, entries))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_METHODLIST\n"));
return false;
}
if ((size - offsetof (struct lf_methodlist, entries))
% sizeof (struct lf_methodlist_entry))
{
einfo (_("%P: warning: malformed CodeView type record"
" LF_METHODLIST\n"));
return false;
}
num_entries = (size - offsetof (struct lf_methodlist, entries))
/ sizeof (struct lf_methodlist_entry);
for (unsigned int i = 0; i < num_entries; i++)
{
if (!remap_type (&ml->entries[i].method_type, map,
type_num, num_types))
return false;
}
break;
}
case LF_ARRAY:
{
struct lf_array *arr = (struct lf_array *) data;
if (size < offsetof (struct lf_array, length_in_bytes))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ARRAY\n"));
return false;
}
if (!remap_type (&arr->element_type, map, type_num, num_types))
return false;
if (!remap_type (&arr->index_type, map, type_num, num_types))
return false;
break;
}
case LF_CLASS:
case LF_STRUCTURE:
{
struct lf_class *cl = (struct lf_class *) data;
uint16_t prop, num_bytes;
size_t name_len, name_off;
if (size < offsetof (struct lf_class, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_CLASS/LF_STRUCTURE\n"));
return false;
}
if (!remap_type (&cl->field_list, map, type_num, num_types))
return false;
if (!remap_type (&cl->derived_from, map, type_num, num_types))
return false;
if (!remap_type (&cl->vshape, map, type_num, num_types))
return false;
name_off = offsetof (struct lf_class, name);
num_bytes = bfd_getl16 (&cl->length);
/* If num_bytes >= 0x8000, actual value follows. */
if (num_bytes >= 0x8000)
{
unsigned int param_len = extended_value_len (num_bytes);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_CLASS/LF_STRUCTURE\n"), num_bytes);
return false;
}
name_off += param_len;
if (size < name_off)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_CLASS/LF_STRUCTURE\n"));
return false;
}
}
name_len = strnlen ((char *) cl + name_off, size - name_off);
if (name_len == size - name_off)
{
einfo (_("%P: warning: name for LF_CLASS/LF_STRUCTURE has no"
" terminating zero\n"));
return false;
}
prop = bfd_getl16 (&cl->properties);
if (prop & CV_PROP_HAS_UNIQUE_NAME)
{
/* Structure has another name following first one. */
size_t len = name_off + name_len + 1;
size_t unique_name_len;
unique_name_len = strnlen ((char *) cl + name_off + name_len + 1,
size - len);
if (unique_name_len == size - len)
{
einfo (_("%P: warning: unique name for LF_CLASS/LF_STRUCTURE"
" has no terminating zero\n"));
return false;
}
}
if (!(prop & (CV_PROP_FORWARD_REF | CV_PROP_SCOPED))
&& !is_name_anonymous ((char *) cl + name_off, name_len))
{
other_hash = true;
cv_hash = crc32 ((uint8_t *) cl + name_off, name_len);
}
break;
}
case LF_UNION:
{
struct lf_union *un = (struct lf_union *) data;
uint16_t prop, num_bytes;
size_t name_len, name_off;
if (size < offsetof (struct lf_union, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_UNION\n"));
return false;
}
if (!remap_type (&un->field_list, map, type_num, num_types))
return false;
name_off = offsetof (struct lf_union, name);
num_bytes = bfd_getl16 (&un->length);
/* If num_bytes >= 0x8000, actual value follows. */
if (num_bytes >= 0x8000)
{
unsigned int param_len = extended_value_len (num_bytes);
if (param_len == 0)
{
einfo (_("%P: warning: unhandled type %v within"
" LF_UNION\n"), num_bytes);
return false;
}
name_off += param_len;
if (size < name_off)
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_UNION\n"));
return false;
}
}
name_len = strnlen ((char *) un + name_off, size - name_off);
if (name_len == size - name_off)
{
einfo (_("%P: warning: name for LF_UNION has no"
" terminating zero\n"));
return false;
}
prop = bfd_getl16 (&un->properties);
if (prop & CV_PROP_HAS_UNIQUE_NAME)
{
/* Structure has another name following first one. */
size_t len = name_off + name_len + 1;
size_t unique_name_len;
unique_name_len = strnlen ((char *) un + name_off + name_len + 1,
size - len);
if (unique_name_len == size - len)
{
einfo (_("%P: warning: unique name for LF_UNION has"
" no terminating zero\n"));
return false;
}
}
if (!(prop & (CV_PROP_FORWARD_REF | CV_PROP_SCOPED))
&& !is_name_anonymous ((char *) un + name_off, name_len))
{
other_hash = true;
cv_hash = crc32 ((uint8_t *) un + name_off, name_len);
}
break;
}
case LF_ENUM:
{
struct lf_enum *en = (struct lf_enum *) data;
uint16_t prop;
size_t name_len;
if (size < offsetof (struct lf_enum, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_ENUM\n"));
return false;
}
if (!remap_type (&en->underlying_type, map, type_num, num_types))
return false;
if (!remap_type (&en->field_list, map, type_num, num_types))
return false;
name_len = strnlen (en->name, size - offsetof (struct lf_enum, name));
if (name_len == size - offsetof (struct lf_enum, name))
{
einfo (_("%P: warning: name for LF_ENUM has no"
" terminating zero\n"));
return false;
}
prop = bfd_getl16 (&en->properties);
if (prop & CV_PROP_HAS_UNIQUE_NAME)
{
/* Structure has another name following first one. */
size_t len = offsetof (struct lf_enum, name) + name_len + 1;
size_t unique_name_len;
unique_name_len = strnlen (en->name + name_len + 1, size - len);
if (unique_name_len == size - len)
{
einfo (_("%P: warning: unique name for LF_ENUM has"
" no terminating zero\n"));
return false;
}
}
break;
}
case LF_VTSHAPE:
/* Does not reference any types, nothing to be done. */
break;
case LF_VFTABLE:
{
struct lf_vftable *vft = (struct lf_vftable *) data;
if (size < offsetof (struct lf_vftable, names))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_VFTABLE\n"));
return false;
}
if (!remap_type (&vft->type, map, type_num, num_types))
return false;
if (!remap_type (&vft->base_vftable, map, type_num, num_types))
return false;
break;
}
case LF_STRING_ID:
{
struct lf_string_id *str = (struct lf_string_id *) data;
size_t string_len;
if (size < offsetof (struct lf_string_id, string))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_STRING_ID\n"));
return false;
}
if (!remap_type (&str->substring, map, type_num, num_types))
return false;
string_len = strnlen (str->string,
size - offsetof (struct lf_string_id, string));
if (string_len == size - offsetof (struct lf_string_id, string))
{
einfo (_("%P: warning: string for LF_STRING_ID has no"
" terminating zero\n"));
return false;
}
ipi = true;
break;
}
case LF_SUBSTR_LIST:
{
uint32_t num_entries;
struct lf_arglist *ssl = (struct lf_arglist *) data;
if (size < offsetof (struct lf_arglist, args))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_SUBSTR_LIST\n"));
return false;
}
num_entries = bfd_getl32 (&ssl->num_entries);
if (size < offsetof (struct lf_arglist, args)
+ (num_entries * sizeof (uint32_t)))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_SUBSTR_LIST\n"));
return false;
}
for (uint32_t i = 0; i < num_entries; i++)
{
if (!remap_type (&ssl->args[i], map, type_num, num_types))
return false;
}
ipi = true;
break;
}
case LF_BUILDINFO:
{
uint16_t num_entries;
struct lf_build_info *bi = (struct lf_build_info *) data;
if (size < offsetof (struct lf_build_info, strings))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_BUILDINFO\n"));
return false;
}
num_entries = bfd_getl16 (&bi->count);
if (size < offsetof (struct lf_build_info, strings)
+ (num_entries * sizeof (uint32_t)))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_BUILDINFO\n"));
return false;
}
for (uint32_t i = 0; i < num_entries; i++)
{
if (!remap_type (&bi->strings[i], map, type_num, num_types))
return false;
}
ipi = true;
break;
}
case LF_FUNC_ID:
{
struct lf_func_id *func = (struct lf_func_id *) data;
size_t name_len;
if (size < offsetof (struct lf_func_id, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_FUNC_ID\n"));
return false;
}
if (!remap_type (&func->parent_scope, map, type_num, num_types))
return false;
if (!remap_type (&func->function_type, map, type_num, num_types))
return false;
name_len = strnlen (func->name,
size - offsetof (struct lf_func_id, name));
if (name_len == size - offsetof (struct lf_func_id, name))
{
einfo (_("%P: warning: string for LF_FUNC_ID has no"
" terminating zero\n"));
return false;
}
ipi = true;
break;
}
case LF_MFUNC_ID:
{
struct lf_mfunc_id *mfunc = (struct lf_mfunc_id *) data;
size_t name_len;
if (size < offsetof (struct lf_mfunc_id, name))
{
einfo (_("%P: warning: truncated CodeView type record"
" LF_MFUNC_ID\n"));
return false;
}
if (!remap_type (&mfunc->parent_type, map, type_num, num_types))
return false;
if (!remap_type (&mfunc->function_type, map, type_num, num_types))
return false;
name_len = strnlen (mfunc->name,
size - offsetof (struct lf_mfunc_id, name));
if (name_len == size - offsetof (struct lf_mfunc_id, name))
{
einfo (_("%P: warning: string for LF_MFUNC_ID has no"
" terminating zero\n"));
return false;
}
ipi = true;
break;
}
case LF_UDT_SRC_LINE:
return handle_udt_src_line (data, size, map, type_num, num_types,
ids, mod_num, strings);
default:
einfo (_("%P: warning: unrecognized CodeView type %v\n"), type);
return false;
}
hash = iterative_hash (data, size, 0);
t = ipi ? ids : types;
slot = htab_find_slot_with_hash (t->hashmap, data, hash, INSERT);
if (!slot)
return false;
if (!*slot) /* new entry */
{
struct type_entry *e;
*slot = xmalloc (offsetof (struct type_entry, data) + size);
e = (struct type_entry *) *slot;
e->next = NULL;
e->index = t->num_types;
if (other_hash)
e->cv_hash = cv_hash;
else
e->cv_hash = crc32 (data, size);
e->has_udt_src_line = false;
memcpy (e->data, data, size);
if (t->last)
t->last->next = e;
else
t->first = e;
t->last = e;
map[type_num] = e;
t->num_types++;
}
else /* duplicate */
{
map[type_num] = (struct type_entry *) *slot;
}
return true;
}
/* Parse the .debug$T section of a module, and pass any type definitions
found to handle_type. */
static bool
handle_debugt_section (asection *s, bfd *mod, struct types *types,
struct types *ids, uint16_t mod_num,
struct string_table *strings,
struct type_entry ***map, uint32_t *num_types)
{
bfd_byte *data = NULL;
size_t off;
uint32_t type_num;
if (!bfd_get_full_section_contents (mod, s, &data))
return false;
if (!data)
return false;
if (bfd_getl32 (data) != CV_SIGNATURE_C13)
{
free (data);
return true;
}
off = sizeof (uint32_t);
while (off + sizeof (uint16_t) <= s->size)
{
uint16_t size;
size = bfd_getl16 (data + off);
off += sizeof (uint16_t);
if (size + off > s->size || size < sizeof (uint16_t))
{
free (data);
bfd_set_error (bfd_error_bad_value);
return false;
}
(*num_types)++;
off += size;
}
if (*num_types == 0)
{
free (data);
return true;
}
*map = xcalloc (*num_types, sizeof (struct type_entry *));
off = sizeof (uint32_t);
type_num = 0;
while (off + sizeof (uint16_t) <= s->size)
{
uint16_t size;
size = bfd_getl16 (data + off);
if (!handle_type (data + off, *map, type_num, *num_types, types, ids,
mod_num, strings))
{
free (data);
free (*map);
bfd_set_error (bfd_error_bad_value);
return false;
}
off += sizeof (uint16_t) + size;
type_num++;
}
free (data);
return true;
}
/* Return the CodeView constant for the selected architecture. */
static uint16_t
target_processor (bfd *abfd)
{
switch (abfd->arch_info->arch)
{
case bfd_arch_i386:
if (abfd->arch_info->mach & bfd_mach_x86_64)
return CV_CFL_X64;
else
return CV_CFL_80386;
case bfd_arch_aarch64:
return CV_CFL_ARM64;
default:
return 0;
}
}
/* Create the symbols that go in "* Linker *", the dummy module created
for the linker itself. */
static bool
create_linker_symbols (bfd *abfd, uint8_t **syms, uint32_t *sym_byte_size,
const char *pdb_name)
{
uint8_t *ptr;
struct objname *name;
struct compile3 *comp;
struct envblock *env;
size_t padding1, padding2, env_size;
char *cwdval, *exeval, *pdbval;
/* extra NUL for padding */
static const char linker_fn[] = "* Linker *\0";
static const char linker_name[] = "GNU LD " VERSION;
static const char cwd[] = "cwd";
static const char exe[] = "exe";
static const char pdb[] = "pdb";
cwdval = getcwd (NULL, 0);
if (!cwdval)
{
einfo (_("%P: warning: unable to get working directory\n"));
return false;
}
exeval = lrealpath (program_name);
if (!exeval)
{
einfo (_("%P: warning: unable to get program name\n"));
free (cwdval);
return false;
}
pdbval = lrealpath (pdb_name);
if (!pdbval)
{
einfo (_("%P: warning: unable to get full path to PDB\n"));
free (exeval);
free (cwdval);
return false;
}
*sym_byte_size += offsetof (struct objname, name) + sizeof (linker_fn);
*sym_byte_size += offsetof (struct compile3, compiler) + sizeof (linker_name);
if (*sym_byte_size % 4)
padding1 = 4 - (*sym_byte_size % 4);
else
padding1 = 0;
*sym_byte_size += padding1;
env_size = offsetof (struct envblock, strings);
env_size += sizeof (cwd);
env_size += strlen (cwdval) + 1;
env_size += sizeof (exe);
env_size += strlen (exeval) + 1;
env_size += sizeof (pdb);
env_size += strlen (pdbval) + 1;
if (env_size % 4)
padding2 = 4 - (env_size % 4);
else
padding2 = 0;
env_size += padding2;
*sym_byte_size += env_size;
*syms = xmalloc (*sym_byte_size);
ptr = *syms;
/* Write S_OBJNAME */
name = (struct objname *) ptr;
bfd_putl16 (offsetof (struct objname, name)
+ sizeof (linker_fn) - sizeof (uint16_t), &name->size);
bfd_putl16 (S_OBJNAME, &name->kind);
bfd_putl32 (0, &name->signature);
memcpy (name->name, linker_fn, sizeof (linker_fn));
ptr += offsetof (struct objname, name) + sizeof (linker_fn);
/* Write S_COMPILE3 */
comp = (struct compile3 *) ptr;
bfd_putl16 (offsetof (struct compile3, compiler) + sizeof (linker_name)
+ padding1 - sizeof (uint16_t), &comp->size);
bfd_putl16 (S_COMPILE3, &comp->kind);
bfd_putl32 (CV_CFL_LINK, &comp->flags);
bfd_putl16 (target_processor (abfd), &comp->machine);
bfd_putl16 (0, &comp->frontend_major);
bfd_putl16 (0, &comp->frontend_minor);
bfd_putl16 (0, &comp->frontend_build);
bfd_putl16 (0, &comp->frontend_qfe);
bfd_putl16 (0, &comp->backend_major);
bfd_putl16 (0, &comp->backend_minor);
bfd_putl16 (0, &comp->backend_build);
bfd_putl16 (0, &comp->backend_qfe);
memcpy (comp->compiler, linker_name, sizeof (linker_name));
memset (comp->compiler + sizeof (linker_name), 0, padding1);
ptr += offsetof (struct compile3, compiler) + sizeof (linker_name) + padding1;
/* Write S_ENVBLOCK */
env = (struct envblock *) ptr;
bfd_putl16 (env_size - sizeof (uint16_t), &env->size);
bfd_putl16 (S_ENVBLOCK, &env->kind);
env->flags = 0;
ptr += offsetof (struct envblock, strings);
memcpy (ptr, cwd, sizeof (cwd));
ptr += sizeof (cwd);
memcpy (ptr, cwdval, strlen (cwdval) + 1);
ptr += strlen (cwdval) + 1;
memcpy (ptr, exe, sizeof (exe));
ptr += sizeof (exe);
memcpy (ptr, exeval, strlen (exeval) + 1);
ptr += strlen (exeval) + 1;
memcpy (ptr, pdb, sizeof (pdb));
ptr += sizeof (pdb);
memcpy (ptr, pdbval, strlen (pdbval) + 1);
ptr += strlen (pdbval) + 1;
/* Microsoft's LINK also includes "cmd", the command-line options passed
to the linker, but unfortunately we don't have access to argc and argv
at this stage. */
memset (ptr, 0, padding2);
free (pdbval);
free (exeval);
free (cwdval);
return true;
}
/* Populate the module stream, which consists of the transformed .debug$S
data for each object file. */
static bool
populate_module_stream (bfd *stream, bfd *mod, uint32_t *sym_byte_size,
struct string_table *strings,
uint32_t *c13_info_size,
struct mod_source_files *mod_source,
bfd *abfd, struct types *types,
struct types *ids, uint16_t mod_num,
bfd *sym_rec_stream, struct globals *glob,
const char *pdb_name)
{
uint8_t int_buf[sizeof (uint32_t)];
uint8_t *c13_info = NULL;
uint8_t *syms = NULL;
*sym_byte_size = 0;
*c13_info_size = 0;
if (!strcmp (bfd_get_filename (mod), "dll stuff"))
{
if (!create_linker_symbols (mod, &syms, sym_byte_size, pdb_name))
return false;
}
else
{
struct type_entry **map = NULL;
uint32_t num_types = 0;
/* Process .debug$T section. */
for (asection *s = mod->sections; s; s = s->next)
{
if (!strcmp (s->name, ".debug$T") && s->size >= sizeof (uint32_t))
{
if (!handle_debugt_section (s, mod, types, ids, mod_num, strings,
&map, &num_types))
{
free (mod_source->files);
return false;
}
break;
}
}
/* Process .debug$S section(s). */
for (asection *s = mod->sections; s; s = s->next)
{
if (!strcmp (s->name, ".debug$S") && s->size >= sizeof (uint32_t))
{
if (!handle_debugs_section (s, mod, strings, &c13_info,
c13_info_size, mod_source, abfd,
&syms, sym_byte_size, map, num_types,
sym_rec_stream, glob, mod_num))
{
free (c13_info);
free (syms);
free (mod_source->files);
free (map);
return false;
}
}
}
free (map);
}
/* Write the signature. */
bfd_putl32 (CV_SIGNATURE_C13, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
{
free (c13_info);
free (syms);
return false;
}
if (syms)
{
if (bfd_write (syms, *sym_byte_size, stream) != *sym_byte_size)
{
free (c13_info);
free (syms);
return false;
}
free (syms);
}
if (c13_info)
{
if (bfd_write (c13_info, *c13_info_size, stream) != *c13_info_size)
{
free (c13_info);
return false;
}
free (c13_info);
}
/* Write the global refs size. */
bfd_putl32 (0, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
return false;
return true;
}
/* Create the module info substream within the DBI. */
static bool
create_module_info_substream (bfd *abfd, bfd *pdb, void **data,
uint32_t *size, struct string_table *strings,
struct source_files_info *source,
struct types *types, struct types *ids,
bfd *sym_rec_stream, struct globals *glob,
const char *pdb_name)
{
uint8_t *ptr;
unsigned int mod_num;
static const char linker_fn[] = "* Linker *";
*size = 0;
for (bfd *in = coff_data (abfd)->link_info->input_bfds; in;
in = in->link.next)
{
size_t len = sizeof (struct module_info);
if (!strcmp (bfd_get_filename (in), "dll stuff"))
{
len += sizeof (linker_fn); /* Object name. */
len++; /* Empty module name. */
}
else if (in->my_archive)
{
char *name = lrealpath (bfd_get_filename (in));
len += strlen (name) + 1; /* Object name. */
free (name);
name = lrealpath (bfd_get_filename (in->my_archive));
len += strlen (name) + 1; /* Archive name. */
free (name);
}
else
{
char *name = lrealpath (bfd_get_filename (in));
size_t name_len = strlen (name) + 1;
len += name_len; /* Object name. */
len += name_len; /* And again as the archive name. */
free (name);
}
if (len % 4)
len += 4 - (len % 4);
*size += len;
source->mod_count++;
}
*data = xmalloc (*size);
ptr = *data;
source->mods = xmalloc (source->mod_count
* sizeof (struct mod_source_files));
memset (source->mods, 0,
source->mod_count * sizeof (struct mod_source_files));
mod_num = 0;
for (bfd *in = coff_data (abfd)->link_info->input_bfds; in;
in = in->link.next)
{
struct module_info *mod = (struct module_info *) ptr;
uint16_t stream_num;
bfd *stream;
uint32_t sym_byte_size, c13_info_size;
uint8_t *start = ptr;
stream = add_stream (pdb, NULL, &stream_num);
if (!stream)
{
for (unsigned int i = 0; i < source->mod_count; i++)
{
free (source->mods[i].files);
}
free (source->mods);
free (*data);
return false;
}
if (!populate_module_stream (stream, in, &sym_byte_size,
strings, &c13_info_size,
&source->mods[mod_num], abfd,
types, ids, mod_num,
sym_rec_stream, glob, pdb_name))
{
for (unsigned int i = 0; i < source->mod_count; i++)
{
free (source->mods[i].files);
}
free (source->mods);
free (*data);
return false;
}
bfd_putl32 (0, &mod->unused1);
/* These are dummy values - MSVC copies the first section contribution
entry here, but doesn't seem to use it for anything. */
bfd_putl16 (0xffff, &mod->sc.section);
bfd_putl16 (0, &mod->sc.padding1);
bfd_putl32 (0, &mod->sc.offset);
bfd_putl32 (0xffffffff, &mod->sc.size);
bfd_putl32 (0, &mod->sc.characteristics);
bfd_putl16 (0xffff, &mod->sc.module_index);
bfd_putl16 (0, &mod->sc.padding2);
bfd_putl32 (0, &mod->sc.data_crc);
bfd_putl32 (0, &mod->sc.reloc_crc);
bfd_putl16 (0, &mod->flags);
bfd_putl16 (stream_num, &mod->module_sym_stream);
bfd_putl32 (sizeof (uint32_t) + sym_byte_size, &mod->sym_byte_size);
bfd_putl32 (0, &mod->c11_byte_size);
bfd_putl32 (c13_info_size, &mod->c13_byte_size);
bfd_putl16 (0, &mod->source_file_count);
bfd_putl16 (0, &mod->padding);
bfd_putl32 (0, &mod->unused2);
bfd_putl32 (0, &mod->source_file_name_index);
bfd_putl32 (0, &mod->pdb_file_path_name_index);
ptr += sizeof (struct module_info);
if (!strcmp (bfd_get_filename (in), "dll stuff"))
{
/* Object name. */
memcpy (ptr, linker_fn, sizeof (linker_fn));
ptr += sizeof (linker_fn);
/* Empty module name. */
*ptr = 0;
ptr++;
}
else if (in->my_archive)
{
char *name = lrealpath (bfd_get_filename (in));
size_t name_len = strlen (name) + 1;
/* Object name. */
memcpy (ptr, name, name_len);
ptr += name_len;
free (name);
name = lrealpath (bfd_get_filename (in->my_archive));
name_len = strlen (name) + 1;
/* Archive name. */
memcpy (ptr, name, name_len);
ptr += name_len;
free (name);
}
else
{
char *name = lrealpath (bfd_get_filename (in));
size_t name_len = strlen (name) + 1;
/* Object name. */
memcpy (ptr, name, name_len);
ptr += name_len;
/* Object name again as archive name. */
memcpy (ptr, name, name_len);
ptr += name_len;
free (name);
}
/* Pad to next four-byte boundary. */
if ((ptr - start) % 4)
{
memset (ptr, 0, 4 - ((ptr - start) % 4));
ptr += 4 - ((ptr - start) % 4);
}
mod_num++;
}
return true;
}
/* Return the index of a given output section. */
static uint16_t
find_section_number (bfd *abfd, asection *sect)
{
uint16_t i = 1;
for (asection *s = abfd->sections; s; s = s->next)
{
if (s == sect)
return i;
/* Empty sections aren't output. */
if (s->size != 0)
i++;
}
return 0;
}
/* Used as parameter to qsort, to sort section contributions by section and
offset. */
static int
section_contribs_compare (const void *p1, const void *p2)
{
const struct in_sc *sc1 = p1;
const struct in_sc *sc2 = p2;
if (sc1->sect_num < sc2->sect_num)
return -1;
if (sc1->sect_num > sc2->sect_num)
return 1;
if (sc1->s->output_offset < sc2->s->output_offset)
return -1;
if (sc1->s->output_offset > sc2->s->output_offset)
return 1;
return 0;
}
/* Create the substream which maps addresses in the image file to locations
in the original object files. */
static bool
create_section_contrib_substream (bfd *abfd, void **data, uint32_t *size)
{
unsigned int num_sc = 0;
struct section_contribution *sc;
uint16_t mod_index;
char *sect_flags;
file_ptr offset;
struct in_sc *sc_in, *sc2;
uint32_t *ptr;
for (bfd *in = coff_data (abfd)->link_info->input_bfds; in;
in = in->link.next)
{
for (asection *s = in->sections; s; s = s->next)
{
if (s->size == 0 || discarded_section (s))
continue;
num_sc++;
}
}
*size = sizeof (uint32_t) + (num_sc * sizeof (struct section_contribution));
*data = xmalloc (*size);
bfd_putl32 (SECTION_CONTRIB_VERSION_60, *data);
/* Read characteristics of outputted sections. */
sect_flags = xmalloc (sizeof (uint32_t) * abfd->section_count);
offset = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
offset += offsetof (struct external_scnhdr, s_flags);
for (unsigned int i = 0; i < abfd->section_count; i++)
{
if (bfd_seek (abfd, offset, SEEK_SET) != 0
|| bfd_read (sect_flags + (i * sizeof (uint32_t)), sizeof (uint32_t),
abfd) != sizeof (uint32_t))
{
free (*data);
free (sect_flags);
return false;
}
offset += sizeof (struct external_scnhdr);
}
/* Microsoft's DIA expects section contributions to be sorted by section
number and offset, otherwise it will be unable to resolve line numbers. */
sc_in = xmalloc (num_sc * sizeof (* sc_in));
sc2 = sc_in;
mod_index = 0;
for (bfd *in = coff_data (abfd)->link_info->input_bfds; in;
in = in->link.next)
{
for (asection *s = in->sections; s; s = s->next)
{
if (s->size == 0 || discarded_section (s))
continue;
sc2->s = s;
sc2->sect_num = find_section_number (abfd, s->output_section);
sc2->mod_index = mod_index;
sc2++;
}
mod_index++;
}
qsort (sc_in, num_sc, sizeof (* sc_in), section_contribs_compare);
ptr = *data;
sc = (struct section_contribution *) (ptr + 1); /* Skip the version word. */
for (unsigned int i = 0; i < num_sc; i++)
{
memcpy (&sc->characteristics,
sect_flags + ((sc_in[i].sect_num - 1) * sizeof (uint32_t)),
sizeof (uint32_t));
bfd_putl16 (sc_in[i].sect_num, &sc->section);
bfd_putl16 (0, &sc->padding1);
bfd_putl32 (sc_in[i].s->output_offset, &sc->offset);
bfd_putl32 (sc_in[i].s->size, &sc->size);
bfd_putl16 (sc_in[i].mod_index, &sc->module_index);
bfd_putl16 (0, &sc->padding2);
bfd_putl32 (0, &sc->data_crc);
bfd_putl32 (0, &sc->reloc_crc);
sc++;
}
free (sc_in);
free (sect_flags);
return true;
}
/* The source info substream lives within the DBI stream, and lists the
source files for each object file (i.e. it's derived from the
DEBUG_S_FILECHKSMS parts of the .debug$S sections). This is a bit
superfluous, as the filenames are also available in the C13 parts of
the module streams, but MSVC relies on it to work properly. */
static void
create_source_info_substream (void **data, uint32_t *size,
struct source_files_info *source)
{
uint16_t dedupe_source_files_count = 0;
uint16_t source_files_count = 0;
uint32_t strings_len = 0;
uint8_t *ptr;
/* Loop through the source files, marking unique filenames. The pointers
here are for entries in the main string table, and so have already
been deduplicated. */
for (uint16_t i = 0; i < source->mod_count; i++)
{
for (uint16_t j = 0; j < source->mods[i].files_count; j++)
{
if (source->mods[i].files[j])
{
if (source->mods[i].files[j]->source_file_offset == 0xffffffff)
{
source->mods[i].files[j]->source_file_offset = strings_len;
strings_len += source->mods[i].files[j]->len + 1;
dedupe_source_files_count++;
}
source_files_count++;
}
}
}
*size = sizeof (uint16_t) + sizeof (uint16_t);
*size += (sizeof (uint16_t) + sizeof (uint16_t)) * source->mod_count;
*size += sizeof (uint32_t) * source_files_count;
*size += strings_len;
*data = xmalloc (*size);
ptr = (uint8_t *) *data;
/* Write header (module count and source file count). */
bfd_putl16 (source->mod_count, ptr);
ptr += sizeof (uint16_t);
bfd_putl16 (dedupe_source_files_count, ptr);
ptr += sizeof (uint16_t);
/* Write "ModIndices". As the LLVM documentation puts it, "this array is
present, but does not appear to be useful". */
for (uint16_t i = 0; i < source->mod_count; i++)
{
bfd_putl16 (i, ptr);
ptr += sizeof (uint16_t);
}
/* Write source file count for each module. */
for (uint16_t i = 0; i < source->mod_count; i++)
{
bfd_putl16 (source->mods[i].files_count, ptr);
ptr += sizeof (uint16_t);
}
/* For each module, write the offsets within the string table
for each source file. */
for (uint16_t i = 0; i < source->mod_count; i++)
{
for (uint16_t j = 0; j < source->mods[i].files_count; j++)
{
if (source->mods[i].files[j])
{
bfd_putl32 (source->mods[i].files[j]->source_file_offset, ptr);
ptr += sizeof (uint32_t);
}
}
}
/* Write the string table. We set source_file_offset to a dummy value for
each entry we write, so we don't write duplicate filenames. */
for (uint16_t i = 0; i < source->mod_count; i++)
{
for (uint16_t j = 0; j < source->mods[i].files_count; j++)
{
if (source->mods[i].files[j]
&& source->mods[i].files[j]->source_file_offset != 0xffffffff)
{
memcpy (ptr, source->mods[i].files[j]->s,
source->mods[i].files[j]->len);
ptr += source->mods[i].files[j]->len;
*ptr = 0;
ptr++;
source->mods[i].files[j]->source_file_offset = 0xffffffff;
}
}
}
}
/* Used as parameter to qsort, to sort globals by hash. */
static int
global_compare_hash (const void *s1, const void *s2)
{
const struct global *g1 = *(const struct global **) s1;
const struct global *g2 = *(const struct global **) s2;
if (g1->hash < g2->hash)
return -1;
if (g1->hash > g2->hash)
return 1;
return 0;
}
/* Create the globals stream, which contains the unmangled symbol names. */
static bool
create_globals_stream (bfd *pdb, struct globals *glob, uint16_t *stream_num)
{
bfd *stream;
struct globals_hash_header h;
uint32_t buckets_size, filled_buckets = 0;
struct global **sorted = NULL;
bool ret = false;
struct global *buckets[NUM_GLOBALS_HASH_BUCKETS];
char int_buf[sizeof (uint32_t)];
stream = add_stream (pdb, NULL, stream_num);
if (!stream)
return false;
memset (buckets, 0, sizeof (buckets));
if (glob->num_entries > 0)
{
struct global *g;
/* Create an array of pointers, sorted by hash value. */
sorted = xmalloc (sizeof (struct global *) * glob->num_entries);
g = glob->first;
for (unsigned int i = 0; i < glob->num_entries; i++)
{
sorted[i] = g;
g = g->next;
}
qsort (sorted, glob->num_entries, sizeof (struct global *),
global_compare_hash);
/* Populate the buckets. */
for (unsigned int i = 0; i < glob->num_entries; i++)
{
if (!buckets[sorted[i]->hash])
{
buckets[sorted[i]->hash] = sorted[i];
filled_buckets++;
}
sorted[i]->index = i;
}
}
buckets_size = NUM_GLOBALS_HASH_BUCKETS / 8;
buckets_size += sizeof (uint32_t);
buckets_size += filled_buckets * sizeof (uint32_t);
bfd_putl32 (GLOBALS_HASH_SIGNATURE, &h.signature);
bfd_putl32 (GLOBALS_HASH_VERSION_70, &h.version);
bfd_putl32 (glob->num_entries * sizeof (struct hash_record),
&h.entries_size);
bfd_putl32 (buckets_size, &h.buckets_size);
if (bfd_write (&h, sizeof (h), stream) != sizeof (h))
return false;
/* Write hash entries, sorted by hash. */
for (unsigned int i = 0; i < glob->num_entries; i++)
{
struct hash_record hr;
bfd_putl32 (sorted[i]->offset + 1, &hr.offset);
bfd_putl32 (sorted[i]->refcount, &hr.reference);
if (bfd_write (&hr, sizeof (hr), stream) != sizeof (hr))
goto end;
}
/* Write the bitmap for filled and unfilled buckets. */
for (unsigned int i = 0; i < NUM_GLOBALS_HASH_BUCKETS; i += 8)
{
uint8_t v = 0;
for (unsigned int j = 0; j < 8; j++)
{
if (buckets[i + j])
v |= 1 << j;
}
if (bfd_write (&v, sizeof (v), stream) != sizeof (v))
goto end;
}
/* Add a 4-byte gap. */
bfd_putl32 (0, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
goto end;
/* Write the bucket offsets. */
for (unsigned int i = 0; i < NUM_GLOBALS_HASH_BUCKETS; i++)
{
if (buckets[i])
{
/* 0xc is size of internal hash_record structure in
Microsoft's parser. */
bfd_putl32 (buckets[i]->index * 0xc, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) !=
sizeof (uint32_t))
goto end;
}
}
ret = true;
end:
free (sorted);
return ret;
}
/* Hash an entry in the globals list. */
static hashval_t
hash_global_entry (const void *p)
{
const struct global *g = (const struct global *) p;
uint16_t len = bfd_getl16 (g->data);
return iterative_hash (g->data, len, 0);
}
/* Compare an entry in the globals list with a symbol. */
static int
eq_global_entry (const void *a, const void *b)
{
const struct global *g = (const struct global *) a;
uint16_t len1, len2;
len1 = bfd_getl16 (g->data) + sizeof (uint16_t);
len2 = bfd_getl16 (b) + sizeof (uint16_t);
if (len1 != len2)
return 0;
return !memcmp (g->data, b, len1);
}
/* Stream 4 is the debug information (DBI) stream. */
static bool
populate_dbi_stream (bfd *stream, bfd *abfd, bfd *pdb,
uint16_t section_header_stream_num,
uint16_t sym_rec_stream_num,
uint16_t publics_stream_num,
struct string_table *strings,
struct types *types,
struct types *ids,
bfd *sym_rec_stream, const char *pdb_name)
{
struct pdb_dbi_stream_header h;
struct optional_dbg_header opt;
void *mod_info, *sc, *source_info;
uint32_t mod_info_size, sc_size, source_info_size;
struct source_files_info source;
struct globals glob;
uint16_t globals_stream_num;
source.mod_count = 0;
source.mods = NULL;
glob.num_entries = 0;
glob.first = NULL;
glob.last = NULL;
glob.hashmap = htab_create_alloc (0, hash_global_entry,
eq_global_entry, free, xcalloc, free);
if (!create_module_info_substream (abfd, pdb, &mod_info, &mod_info_size,
strings, &source, types, ids,
sym_rec_stream, &glob, pdb_name))
{
htab_delete (glob.hashmap);
return false;
}
if (!create_globals_stream (pdb, &glob, &globals_stream_num))
{
htab_delete (glob.hashmap);
for (unsigned int i = 0; i < source.mod_count; i++)
{
free (source.mods[i].files);
}
free (source.mods);
free (mod_info);
return false;
}
htab_delete (glob.hashmap);
if (!create_section_contrib_substream (abfd, &sc, &sc_size))
{
for (unsigned int i = 0; i < source.mod_count; i++)
{
free (source.mods[i].files);
}
free (source.mods);
free (mod_info);
return false;
}
create_source_info_substream (&source_info, &source_info_size, &source);
for (unsigned int i = 0; i < source.mod_count; i++)
{
free (source.mods[i].files);
}
free (source.mods);
bfd_putl32 (0xffffffff, &h.version_signature);
bfd_putl32 (DBI_STREAM_VERSION_70, &h.version_header);
bfd_putl32 (1, &h.age);
bfd_putl16 (globals_stream_num, &h.global_stream_index);
bfd_putl16 (0x8e1d, &h.build_number); // MSVC 14.29
bfd_putl16 (publics_stream_num, &h.public_stream_index);
bfd_putl16 (0, &h.pdb_dll_version);
bfd_putl16 (sym_rec_stream_num, &h.sym_record_stream);
bfd_putl16 (0, &h.pdb_dll_rbld);
bfd_putl32 (mod_info_size, &h.mod_info_size);
bfd_putl32 (sc_size, &h.section_contribution_size);
bfd_putl32 (0, &h.section_map_size);
bfd_putl32 (source_info_size, &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_write (&h, sizeof (h), stream) != sizeof (h))
{
free (source_info);
free (sc);
free (mod_info);
return false;
}
if (bfd_write (mod_info, mod_info_size, stream) != mod_info_size)
{
free (source_info);
free (sc);
free (mod_info);
return false;
}
free (mod_info);
if (bfd_write (sc, sc_size, stream) != sc_size)
{
free (source_info);
free (sc);
return false;
}
free (sc);
if (bfd_write (source_info, source_info_size, stream) != source_info_size)
{
free (source_info);
return false;
}
free (source_info);
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 (section_header_stream_num, &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_write (&opt, sizeof (opt), stream) != sizeof (opt))
return false;
return true;
}
/* Used as parameter to qsort, to sort publics by hash. */
static int
public_compare_hash (const void *s1, const void *s2)
{
const struct public *p1 = *(const struct public **) s1;
const struct public *p2 = *(const struct public **) s2;
if (p1->hash < p2->hash)
return -1;
if (p1->hash > p2->hash)
return 1;
return 0;
}
/* Used as parameter to qsort, to sort publics by address. */
static int
public_compare_addr (const void *s1, const void *s2)
{
const struct public *p1 = *(const struct public **) s1;
const struct public *p2 = *(const struct public **) s2;
if (p1->section < p2->section)
return -1;
if (p1->section > p2->section)
return 1;
if (p1->address < p2->address)
return -1;
if (p1->address > p2->address)
return 1;
return 0;
}
/* The publics stream is a hash map of S_PUB32 records, which are stored
in the symbol record stream. Each S_PUB32 entry represents a symbol
from the point of view of the linker: a section index, an offset within
the section, and a mangled name. Compare with S_GDATA32 and S_GPROC32,
which are the same thing but generated by the compiler. */
static bool
populate_publics_stream (bfd *stream, bfd *abfd, bfd *sym_rec_stream)
{
struct publics_header header;
struct globals_hash_header hash_header;
const unsigned int num_buckets = 4096;
unsigned int num_entries = 0, filled_buckets = 0;
unsigned int buckets_size, sym_hash_size;
char int_buf[sizeof (uint32_t)];
struct public *publics_head = NULL, *publics_tail = NULL;
struct public **buckets;
struct public **sorted = NULL;
bool ret = false;
buckets = xmalloc (sizeof (struct public *) * num_buckets);
memset (buckets, 0, sizeof (struct public *) * num_buckets);
/* Loop through the global symbols in our input files, and write S_PUB32
records in the symbol record stream for those that make it into the
final image. */
for (bfd *in = coff_data (abfd)->link_info->input_bfds; in;
in = in->link.next)
{
if (!in->outsymbols)
continue;
for (unsigned int i = 0; i < in->symcount; i++)
{
struct bfd_symbol *sym = in->outsymbols[i];
if (sym->flags & BSF_GLOBAL)
{
struct pubsym ps;
uint16_t record_length;
const char *name = sym->name;
size_t name_len = strlen (name);
struct public *p = xmalloc (sizeof (struct public));
unsigned int padding = 0;
uint16_t section;
uint32_t flags = 0;
section =
find_section_number (abfd, sym->section->output_section);
if (section == 0)
continue;
p->next = NULL;
p->offset = bfd_tell (sym_rec_stream);
p->hash = calc_hash (name, name_len) % num_buckets;
p->section = section;
p->address = sym->section->output_offset + sym->value;
record_length = sizeof (struct pubsym) + name_len + 1;
if (record_length % 4)
padding = 4 - (record_length % 4);
/* Assume that all global symbols in executable sections
are functions. */
if (sym->section->flags & SEC_CODE)
flags = PUBSYM_FUNCTION;
bfd_putl16 (record_length + padding - sizeof (uint16_t),
&ps.record_length);
bfd_putl16 (S_PUB32, &ps.record_type);
bfd_putl32 (flags, &ps.flags);
bfd_putl32 (p->address, &ps.offset);
bfd_putl16 (p->section, &ps.section);
if (bfd_write (&ps, sizeof (struct pubsym), sym_rec_stream) !=
sizeof (struct pubsym))
goto end;
if (bfd_write (name, name_len + 1, sym_rec_stream) !=
name_len + 1)
goto end;
for (unsigned int j = 0; j < padding; j++)
{
uint8_t b = 0;
if (bfd_write (&b, sizeof (uint8_t), sym_rec_stream) !=
sizeof (uint8_t))
goto end;
}
if (!publics_head)
publics_head = p;
else
publics_tail->next = p;
publics_tail = p;
num_entries++;
}
}
}
if (num_entries > 0)
{
/* Create an array of pointers, sorted by hash value. */
sorted = xmalloc (sizeof (struct public *) * num_entries);
struct public *p = publics_head;
for (unsigned int i = 0; i < num_entries; i++)
{
sorted[i] = p;
p = p->next;
}
qsort (sorted, num_entries, sizeof (struct public *),
public_compare_hash);
/* Populate the buckets. */
for (unsigned int i = 0; i < num_entries; i++)
{
if (!buckets[sorted[i]->hash])
{
buckets[sorted[i]->hash] = sorted[i];
filled_buckets++;
}
sorted[i]->index = i;
}
}
buckets_size = num_buckets / 8;
buckets_size += sizeof (uint32_t);
buckets_size += filled_buckets * sizeof (uint32_t);
sym_hash_size = sizeof (hash_header);
sym_hash_size += num_entries * sizeof (struct hash_record);
sym_hash_size += buckets_size;
/* Output the publics header. */
bfd_putl32 (sym_hash_size, &header.sym_hash_size);
bfd_putl32 (num_entries * sizeof (uint32_t), &header.addr_map_size);
bfd_putl32 (0, &header.num_thunks);
bfd_putl32 (0, &header.thunks_size);
bfd_putl32 (0, &header.thunk_table);
bfd_putl32 (0, &header.thunk_table_offset);
bfd_putl32 (0, &header.num_sects);
if (bfd_write (&header, sizeof (header), stream) != sizeof (header))
goto end;
/* Output the global hash header. */
bfd_putl32 (GLOBALS_HASH_SIGNATURE, &hash_header.signature);
bfd_putl32 (GLOBALS_HASH_VERSION_70, &hash_header.version);
bfd_putl32 (num_entries * sizeof (struct hash_record),
&hash_header.entries_size);
bfd_putl32 (buckets_size, &hash_header.buckets_size);
if (bfd_write (&hash_header, sizeof (hash_header), stream) !=
sizeof (hash_header))
goto end;
/* Write the entries in hash order. */
for (unsigned int i = 0; i < num_entries; i++)
{
struct hash_record hr;
bfd_putl32 (sorted[i]->offset + 1, &hr.offset);
bfd_putl32 (1, &hr.reference);
if (bfd_write (&hr, sizeof (hr), stream) != sizeof (hr))
goto end;
}
/* Write the bitmap for filled and unfilled buckets. */
for (unsigned int i = 0; i < num_buckets; i += 8)
{
uint8_t v = 0;
for (unsigned int j = 0; j < 8; j++)
{
if (buckets[i + j])
v |= 1 << j;
}
if (bfd_write (&v, sizeof (v), stream) != sizeof (v))
goto end;
}
/* Add a 4-byte gap. */
bfd_putl32 (0, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
goto end;
/* Write the bucket offsets. */
for (unsigned int i = 0; i < num_buckets; i++)
{
if (buckets[i])
{
/* 0xc is size of internal hash_record structure in
Microsoft's parser. */
bfd_putl32 (buckets[i]->index * 0xc, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) !=
sizeof (uint32_t))
goto end;
}
}
/* Write the address map: offsets into the symbol record stream of
S_PUB32 records, ordered by address. */
if (num_entries > 0)
{
qsort (sorted, num_entries, sizeof (struct public *),
public_compare_addr);
for (unsigned int i = 0; i < num_entries; i++)
{
bfd_putl32 (sorted[i]->offset, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) !=
sizeof (uint32_t))
goto end;
}
}
ret = true;
end:
free (buckets);
while (publics_head)
{
struct public *p = publics_head->next;
free (publics_head);
publics_head = p;
}
free (sorted);
return ret;
}
/* The section header stream contains a copy of the section headers
from the PE file, in the same format. */
static bool
create_section_header_stream (bfd *pdb, bfd *abfd, uint16_t *num)
{
bfd *stream;
unsigned int section_count;
file_ptr scn_base;
size_t len;
char *buf;
stream = add_stream (pdb, NULL, num);
if (!stream)
return false;
section_count = abfd->section_count;
/* Empty sections aren't output. */
for (asection *sect = abfd->sections; sect; sect = sect->next)
{
if (sect->size == 0)
section_count--;
}
if (section_count == 0)
return true;
/* Copy section table from output - it's already been written at this
point. */
scn_base = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
return false;
len = section_count * sizeof (struct external_scnhdr);
buf = xmalloc (len);
if (bfd_read (buf, len, abfd) != len)
{
free (buf);
return false;
}
if (bfd_write (buf, len, stream) != len)
{
free (buf);
return false;
}
free (buf);
return true;
}
/* Populate the "/names" named stream, which contains the string table. */
static bool
populate_names_stream (bfd *stream, struct string_table *strings)
{
char int_buf[sizeof (uint32_t)];
struct string_table_header h;
uint32_t num_strings = 0, num_buckets;
struct string **buckets;
bfd_putl32 (STRING_TABLE_SIGNATURE, &h.signature);
bfd_putl32 (STRING_TABLE_VERSION, &h.version);
if (bfd_write (&h, sizeof (h), stream) != sizeof (h))
return false;
bfd_putl32 (strings->strings_len, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
return false;
int_buf[0] = 0;
if (bfd_write (int_buf, 1, stream) != 1)
return false;
for (struct string *s = strings->strings_head; s; s = s->next)
{
if (bfd_write (s->s, s->len, stream) != s->len)
return false;
if (bfd_write (int_buf, 1, stream) != 1)
return false;
num_strings++;
}
num_buckets = num_strings * 2;
buckets = xmalloc (sizeof (struct string *) * num_buckets);
memset (buckets, 0, sizeof (struct string *) * num_buckets);
for (struct string *s = strings->strings_head; s; s = s->next)
{
uint32_t bucket_num = s->hash % num_buckets;
while (buckets[bucket_num])
{
bucket_num++;
if (bucket_num == num_buckets)
bucket_num = 0;
}
buckets[bucket_num] = s;
}
bfd_putl32 (num_buckets, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
{
free (buckets);
return false;
}
for (unsigned int i = 0; i < num_buckets; i++)
{
if (buckets[i])
bfd_putl32 (buckets[i]->offset, int_buf);
else
bfd_putl32 (0, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) !=
sizeof (uint32_t))
{
free (buckets);
return false;
}
}
free (buckets);
bfd_putl32 (num_strings, int_buf);
if (bfd_write (int_buf, sizeof (uint32_t), stream) != sizeof (uint32_t))
return false;
return true;
}
/* Calculate the hash of a type_entry. */
static hashval_t
hash_type_entry (const void *p)
{
const struct type_entry *e = (const struct type_entry *) p;
uint16_t size = bfd_getl16 (e->data) + sizeof (uint16_t);
return iterative_hash (e->data, size, 0);
}
/* Compare a type_entry with a type. */
static int
eq_type_entry (const void *a, const void *b)
{
const struct type_entry *e = (const struct type_entry *) a;
uint16_t size_a = bfd_getl16 (e->data);
uint16_t size_b = bfd_getl16 (b);
if (size_a != size_b)
return 0;
return memcmp (e->data + sizeof (uint16_t),
(const uint8_t *) b + sizeof (uint16_t), size_a) == 0;
}
/* 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, *sym_rec_stream,
*publics_stream, *tpi_stream, *ipi_stream;
uint16_t section_header_stream_num, sym_rec_stream_num, publics_stream_num;
struct string_table strings;
struct types types, ids;
pdb = bfd_openw (pdb_name, "pdb");
if (!pdb)
{
einfo (_("%P: warning: cannot create PDB file: %E\n"));
return false;
}
strings.strings_head = NULL;
strings.strings_tail = NULL;
strings.strings_len = 1;
strings.hashmap = htab_create_alloc (0, hash_string_table_entry,
eq_string_table_entry, free,
xcalloc, free);
bfd_set_format (pdb, bfd_archive);
if (!create_old_directory_stream (pdb))
{
einfo (_("%P: warning: cannot create old directory stream "
"in PDB file: %E\n"));
goto end;
}
info_stream = add_stream (pdb, NULL, NULL);
if (!info_stream)
{
einfo (_("%P: warning: cannot create info stream "
"in PDB file: %E\n"));
goto end;
}
tpi_stream = add_stream (pdb, NULL, NULL);
if (!tpi_stream)
{
einfo (_("%P: warning: cannot create TPI stream "
"in PDB file: %E\n"));
goto end;
}
dbi_stream = add_stream (pdb, NULL, NULL);
if (!dbi_stream)
{
einfo (_("%P: warning: cannot create DBI stream "
"in PDB file: %E\n"));
goto end;
}
ipi_stream = add_stream (pdb, NULL, NULL);
if (!ipi_stream)
{
einfo (_("%P: warning: cannot create IPI stream "
"in PDB file: %E\n"));
goto end;
}
names_stream = add_stream (pdb, "/names", NULL);
if (!names_stream)
{
einfo (_("%P: warning: cannot create /names stream "
"in PDB file: %E\n"));
goto end;
}
sym_rec_stream = add_stream (pdb, NULL, &sym_rec_stream_num);
if (!sym_rec_stream)
{
einfo (_("%P: warning: cannot create symbol record stream "
"in PDB file: %E\n"));
goto end;
}
publics_stream = add_stream (pdb, NULL, &publics_stream_num);
if (!publics_stream)
{
einfo (_("%P: warning: cannot create publics stream "
"in PDB file: %E\n"));
goto end;
}
if (!create_section_header_stream (pdb, abfd, &section_header_stream_num))
{
einfo (_("%P: warning: cannot create section header stream "
"in PDB file: %E\n"));
goto end;
}
types.num_types = 0;
types.hashmap = htab_create_alloc (0, hash_type_entry, eq_type_entry,
free, xcalloc, free);
types.first = types.last = NULL;
ids.num_types = 0;
ids.hashmap = htab_create_alloc (0, hash_type_entry, eq_type_entry,
free, xcalloc, free);
ids.first = ids.last = NULL;
if (!populate_dbi_stream (dbi_stream, abfd, pdb, section_header_stream_num,
sym_rec_stream_num, publics_stream_num,
&strings, &types, &ids, sym_rec_stream, pdb_name))
{
einfo (_("%P: warning: cannot populate DBI stream "
"in PDB file: %E\n"));
htab_delete (types.hashmap);
htab_delete (ids.hashmap);
goto end;
}
if (!populate_type_stream (pdb, tpi_stream, &types))
{
einfo (_("%P: warning: cannot populate TPI stream "
"in PDB file: %E\n"));
htab_delete (types.hashmap);
htab_delete (ids.hashmap);
goto end;
}
htab_delete (types.hashmap);
if (!populate_type_stream (pdb, ipi_stream, &ids))
{
einfo (_("%P: warning: cannot populate IPI stream "
"in PDB file: %E\n"));
htab_delete (ids.hashmap);
goto end;
}
htab_delete (ids.hashmap);
add_string ("", 0, &strings);
if (!populate_names_stream (names_stream, &strings))
{
einfo (_("%P: warning: cannot populate names stream "
"in PDB file: %E\n"));
goto end;
}
if (!populate_publics_stream (publics_stream, abfd, sym_rec_stream))
{
einfo (_("%P: warning: cannot populate publics stream "
"in PDB file: %E\n"));
goto end;
}
if (!populate_info_stream (pdb, info_stream, guid))
{
einfo (_("%P: warning: cannot populate info stream "
"in PDB file: %E\n"));
goto end;
}
ret = true;
end:
bfd_close (pdb);
htab_delete (strings.hashmap);
return ret;
}
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