+/* Add a new symbol found in an S-record file. */
+
+static boolean
+srec_new_symbol (abfd, name, val)
+ bfd *abfd;
+ const char *name;
+ bfd_vma val;
+{
+ struct srec_symbol *n;
+
+ n = (struct srec_symbol *) bfd_alloc (abfd, sizeof (struct srec_symbol));
+ if (n == NULL)
+ return false;
+
+ n->name = name;
+ n->val = val;
+
+ if (abfd->tdata.srec_data->symbols == NULL)
+ abfd->tdata.srec_data->symbols = n;
+ else
+ abfd->tdata.srec_data->symtail->next = n;
+ abfd->tdata.srec_data->symtail = n;
+ n->next = NULL;
+
+ ++abfd->symcount;
+
+ return true;
+}
+
+/* Read the S record file and turn it into sections. We create a new
+ section for each contiguous set of bytes. */
+
+static boolean
+srec_scan (abfd)
+ bfd *abfd;
+{
+ int c;
+ unsigned int lineno = 1;
+ boolean error = false;
+ bfd_byte *buf = NULL;
+ size_t bufsize = 0;
+ asection *sec = NULL;
+ char *symbuf = NULL;
+
+ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
+ goto error_return;
+
+ while ((c = srec_get_byte (abfd, &error)) != EOF)
+ {
+ /* We only build sections from contiguous S-records, so if this
+ is not an S-record, then stop building a section. */
+ if (c != 'S' && c != '\r' && c != '\n')
+ sec = NULL;
+
+ switch (c)
+ {
+ default:
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+
+ case '\n':
+ ++lineno;
+ break;
+
+ case '\r':
+ break;
+
+ case '$':
+ /* Starting a module name, which we ignore. */
+ while ((c = srec_get_byte (abfd, &error)) != '\n'
+ && c != EOF)
+ ;
+ if (c == EOF)
+ {
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+
+ ++lineno;
+
+ break;
+
+ case ' ':
+ do
+ {
+ unsigned int alc;
+ char *p, *symname;
+ bfd_vma symval;
+
+ /* Starting a symbol definition. */
+ while ((c = srec_get_byte (abfd, &error)) != EOF
+ && (c == ' ' || c == '\t'))
+ ;
+
+ if (c == '\n' || c == '\r')
+ break;
+
+ if (c == EOF)
+ {
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+
+ alc = 10;
+ symbuf = (char *) bfd_malloc (alc + 1);
+ if (symbuf == NULL)
+ goto error_return;
+
+ p = symbuf;
+
+ *p++ = c;
+ while ((c = srec_get_byte (abfd, &error)) != EOF
+ && ! isspace (c))
+ {
+ if ((unsigned int) (p - symbuf) >= alc)
+ {
+ char *n;
+
+ alc *= 2;
+ n = (char *) bfd_realloc (symbuf, alc + 1);
+ if (n == NULL)
+ goto error_return;
+ p = n + (p - symbuf);
+ symbuf = n;
+ }
+
+ *p++ = c;
+ }
+
+ if (c == EOF)
+ {
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+
+ *p++ = '\0';
+ symname = bfd_alloc (abfd, p - symbuf);
+ if (symname == NULL)
+ goto error_return;
+ strcpy (symname, symbuf);
+ free (symbuf);
+ symbuf = NULL;
+
+ while ((c = srec_get_byte (abfd, &error)) != EOF
+ && (c == ' ' || c == '\t'))
+ ;
+ if (c == EOF)
+ {
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+
+ /* Skip a dollar sign before the hex value. */
+ if (c == '$')
+ {
+ c = srec_get_byte (abfd, &error);
+ if (c == EOF)
+ {
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+ }
+
+ symval = 0;
+ while (ISHEX (c))
+ {
+ symval <<= 4;
+ symval += NIBBLE (c);
+ c = srec_get_byte (abfd, &error);
+ }
+
+ if (! srec_new_symbol (abfd, symname, symval))
+ goto error_return;
+ }
+ while (c == ' ' || c == '\t')
+ ;
+
+ if (c == '\n')
+ ++lineno;
+ else if (c != '\r')
+ {
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+
+ break;
+
+ case 'S':
+ {
+ file_ptr pos;
+ char hdr[3];
+ unsigned int bytes;
+ bfd_vma address;
+ bfd_byte *data;
+
+ /* Starting an S-record. */
+
+ pos = bfd_tell (abfd) - 1;
+
+ if (bfd_read (hdr, 1, 3, abfd) != 3)
+ goto error_return;
+
+ if (! ISHEX (hdr[1]) || ! ISHEX (hdr[2]))
+ {
+ if (! ISHEX (hdr[1]))
+ c = hdr[1];
+ else
+ c = hdr[2];
+ srec_bad_byte (abfd, lineno, c, error);
+ goto error_return;
+ }
+
+ bytes = HEX (hdr + 1);
+ if (bytes * 2 > bufsize)
+ {
+ if (buf != NULL)
+ free (buf);
+ buf = (bfd_byte *) bfd_malloc (bytes * 2);
+ if (buf == NULL)
+ goto error_return;
+ bufsize = bytes * 2;
+ }
+
+ if (bfd_read (buf, 1, bytes * 2, abfd) != bytes * 2)
+ goto error_return;
+
+ /* Ignore the checksum byte. */
+ --bytes;
+
+ address = 0;
+ data = buf;
+ switch (hdr[0])
+ {
+ case '0':
+ case '5':
+ /* Prologue--ignore the file name, but stop building a
+ section at this point. */
+ sec = NULL;
+ break;
+
+ case '3':
+ address = HEX (data);
+ data += 2;
+ --bytes;
+ /* Fall through. */
+ case '2':
+ address = (address << 8) | HEX (data);
+ data += 2;
+ --bytes;
+ /* Fall through. */
+ case '1':
+ address = (address << 8) | HEX (data);
+ data += 2;
+ address = (address << 8) | HEX (data);
+ data += 2;
+ bytes -= 2;
+
+ if (sec != NULL
+ && sec->vma + sec->_raw_size == address)
+ {
+ /* This data goes at the end of the section we are
+ currently building. */
+ sec->_raw_size += bytes;
+ }
+ else
+ {
+ char secbuf[20];
+ char *secname;
+
+ sprintf (secbuf, ".sec%d", bfd_count_sections (abfd) + 1);
+ secname = (char *) bfd_alloc (abfd, strlen (secbuf) + 1);
+ strcpy (secname, secbuf);
+ sec = bfd_make_section (abfd, secname);
+ if (sec == NULL)
+ goto error_return;
+ sec->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
+ sec->vma = address;
+ sec->lma = address;
+ sec->_raw_size = bytes;
+ sec->filepos = pos;
+ }
+
+ break;
+
+ case '7':
+ address = HEX (data);
+ data += 2;
+ /* Fall through. */
+ case '8':
+ address = (address << 8) | HEX (data);
+ data += 2;
+ /* Fall through. */
+ case '9':
+ address = (address << 8) | HEX (data);
+ data += 2;
+ address = (address << 8) | HEX (data);
+ data += 2;
+
+ /* This is a termination record. */
+ abfd->start_address = address;
+
+ if (buf != NULL)
+ free (buf);
+
+ return true;
+ }
+ }
+ break;
+ }
+ }
+
+ if (error)
+ goto error_return;
+
+ if (buf != NULL)
+ free (buf);
+
+ return true;
+
+ error_return:
+ if (symbuf != NULL)
+ free (symbuf);
+ if (buf != NULL)
+ free (buf);
+ return false;
+}
+
+/* Check whether an existing file is an S-record file. */