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  1. /* BFD back-end for Intel Hex objects.
  2.    Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
  3.    2006, 2007, 2009, 2011 Free Software Foundation, Inc.
  4.    Written by Ian Lance Taylor of Cygnus Support <ian@cygnus.com>.
  5.  
  6.    This file is part of BFD, the Binary File Descriptor library.
  7.  
  8.    This program is free software; you can redistribute it and/or modify
  9.    it under the terms of the GNU General Public License as published by
  10.    the Free Software Foundation; either version 3 of the License, or
  11.    (at your option) any later version.
  12.  
  13.    This program is distributed in the hope that it will be useful,
  14.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16.    GNU General Public License for more details.
  17.  
  18.    You should have received a copy of the GNU General Public License
  19.    along with this program; if not, write to the Free Software
  20.    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21.    MA 02110-1301, USA.  */
  22.  
  23.  
  24. /* This is what Intel Hex files look like:
  25.  
  26. 1. INTEL FORMATS
  27.  
  28. A. Intel 1
  29.  
  30.    16-bit address-field format, for files 64k bytes in length or less.
  31.  
  32.    DATA RECORD
  33.    Byte 1       Header = colon(:)
  34.    2..3         The number of data bytes in hex notation
  35.    4..5         High byte of the record load address
  36.    6..7         Low byte of the record load address
  37.    8..9         Record type, must be "00"
  38.    10..x        Data bytes in hex notation:
  39.         x = (number of bytes - 1) * 2 + 11
  40.    x+1..x+2     Checksum in hex notation
  41.    x+3..x+4     Carriage return, line feed
  42.  
  43.    END RECORD
  44.    Byte 1       Header = colon (:)
  45.    2..3         The byte count, must be "00"
  46.    4..7         Transfer-address (usually "0000")
  47.                 the jump-to address, execution start address
  48.    8..9         Record type, must be "01"
  49.    10..11       Checksum, in hex notation
  50.    12..13       Carriage return, line feed
  51.  
  52. B. INTEL 2
  53.  
  54.    MCS-86 format, using a 20-bit address for files larger than 64K bytes.
  55.  
  56.    DATA RECORD
  57.    Byte 1       Header = colon (:)
  58.    2..3         The byte count of this record, hex notation
  59.    4..5         High byte of the record load address
  60.    6..7         Low byte of the record load address
  61.    8..9         Record type, must be "00"
  62.    10..x        The data bytes in hex notation:
  63.         x = (number of data bytes - 1) * 2 + 11
  64.    x+1..x+2     Checksum in hex notation
  65.    x+3..x+4     Carriage return, line feed
  66.  
  67.    EXTENDED ADDRESS RECORD
  68.    Byte 1       Header = colon(:)
  69.    2..3         The byte count, must be "02"
  70.    4..7         Load address, must be "0000"
  71.    8..9         Record type, must be "02"
  72.    10..11       High byte of the offset address
  73.    12..13       Low byte of the offset address
  74.    14..15       Checksum in hex notation
  75.    16..17       Carriage return, line feed
  76.  
  77.    The checksums are the two's complement of the 8-bit sum
  78.    without carry of the byte count, offset address, and the
  79.    record type.
  80.  
  81.    START ADDRESS RECORD
  82.    Byte 1       Header = colon (:)
  83.    2..3         The byte count, must be "04"
  84.    4..7         Load address, must be "0000"
  85.    8..9         Record type, must be "03"
  86.    10..13       8086 CS value
  87.    14..17       8086 IP value
  88.    18..19       Checksum in hex notation
  89.    20..21       Carriage return, line feed
  90.  
  91. Another document reports these additional types:
  92.  
  93.    EXTENDED LINEAR ADDRESS RECORD
  94.    Byte 1       Header = colon (:)
  95.    2..3         The byte count, must be "02"
  96.    4..7         Load address, must be "0000"
  97.    8..9         Record type, must be "04"
  98.    10..13       Upper 16 bits of address of subsequent records
  99.    14..15       Checksum in hex notation
  100.    16..17       Carriage return, line feed
  101.  
  102.    START LINEAR ADDRESS RECORD
  103.    Byte 1       Header = colon (:)
  104.    2..3         The byte count, must be "02"
  105.    4..7         Load address, must be "0000"
  106.    8..9         Record type, must be "05"
  107.    10..13       Upper 16 bits of start address
  108.    14..15       Checksum in hex notation
  109.    16..17       Carriage return, line feed
  110.  
  111. The MRI compiler uses this, which is a repeat of type 5:
  112.  
  113.   EXTENDED START RECORD
  114.    Byte 1       Header = colon (:)
  115.    2..3         The byte count, must be "04"
  116.    4..7         Load address, must be "0000"
  117.    8..9         Record type, must be "05"
  118.    10..13       Upper 16 bits of start address
  119.    14..17       Lower 16 bits of start address
  120.    18..19       Checksum in hex notation
  121.    20..21       Carriage return, line feed.  */
  122.  
  123. #include "sysdep.h"
  124. #include "bfd.h"
  125. #include "libbfd.h"
  126. #include "libiberty.h"
  127. #include "safe-ctype.h"
  128.  
  129. /* The number of bytes we put on one line during output.  */
  130.  
  131. #define CHUNK 16
  132.  
  133. /* Macros for converting between hex and binary.  */
  134.  
  135. #define NIBBLE(x)    (hex_value (x))
  136. #define HEX2(buffer) ((NIBBLE ((buffer)[0]) << 4) + NIBBLE ((buffer)[1]))
  137. #define HEX4(buffer) ((HEX2 (buffer) << 8) + HEX2 ((buffer) + 2))
  138. #define ISHEX(x)     (hex_p (x))
  139.  
  140. /* When we write out an ihex value, the values can not be output as
  141.    they are seen.  Instead, we hold them in memory in this structure.  */
  142.  
  143. struct ihex_data_list
  144. {
  145.   struct ihex_data_list *next;
  146.   bfd_byte *data;
  147.   bfd_vma where;
  148.   bfd_size_type size;
  149. };
  150.  
  151. /* The ihex tdata information.  */
  152.  
  153. struct ihex_data_struct
  154. {
  155.   struct ihex_data_list *head;
  156.   struct ihex_data_list *tail;
  157. };
  158.  
  159. /* Initialize by filling in the hex conversion array.  */
  160.  
  161. static void
  162. ihex_init (void)
  163. {
  164.   static bfd_boolean inited;
  165.  
  166.   if (! inited)
  167.     {
  168.       inited = TRUE;
  169.       hex_init ();
  170.     }
  171. }
  172.  
  173. /* Create an ihex object.  */
  174.  
  175. static bfd_boolean
  176. ihex_mkobject (bfd *abfd)
  177. {
  178.   struct ihex_data_struct *tdata;
  179.  
  180.   tdata = (struct ihex_data_struct *) bfd_alloc (abfd, sizeof (* tdata));
  181.   if (tdata == NULL)
  182.     return FALSE;
  183.  
  184.   abfd->tdata.ihex_data = tdata;
  185.   tdata->head = NULL;
  186.   tdata->tail = NULL;
  187.   return TRUE;
  188. }
  189.  
  190. /* Read a byte from a BFD.  Set *ERRORPTR if an error occurred.
  191.    Return EOF on error or end of file.  */
  192.  
  193. static INLINE int
  194. ihex_get_byte (bfd *abfd, bfd_boolean *errorptr)
  195. {
  196.   bfd_byte c;
  197.  
  198.   if (bfd_bread (&c, (bfd_size_type) 1, abfd) != 1)
  199.     {
  200.       if (bfd_get_error () != bfd_error_file_truncated)
  201.         *errorptr = TRUE;
  202.       return EOF;
  203.     }
  204.  
  205.   return (int) (c & 0xff);
  206. }
  207.  
  208. /* Report a problem in an Intel Hex file.  */
  209.  
  210. static void
  211. ihex_bad_byte (bfd *abfd, unsigned int lineno, int c, bfd_boolean error)
  212. {
  213.   if (c == EOF)
  214.     {
  215.       if (! error)
  216.         bfd_set_error (bfd_error_file_truncated);
  217.     }
  218.   else
  219.     {
  220.       char buf[10];
  221.  
  222.       if (! ISPRINT (c))
  223.         sprintf (buf, "\\%03o", (unsigned int) c);
  224.       else
  225.         {
  226.           buf[0] = c;
  227.           buf[1] = '\0';
  228.         }
  229.       (*_bfd_error_handler)
  230.         (_("%B:%d: unexpected character `%s' in Intel Hex file"),
  231.          abfd, lineno, buf);
  232.       bfd_set_error (bfd_error_bad_value);
  233.     }
  234. }
  235.  
  236. /* Read an Intel hex file and turn it into sections.  We create a new
  237.    section for each contiguous set of bytes.  */
  238.  
  239. static bfd_boolean
  240. ihex_scan (bfd *abfd)
  241. {
  242.   bfd_vma segbase;
  243.   bfd_vma extbase;
  244.   asection *sec;
  245.   unsigned int lineno;
  246.   bfd_boolean error;
  247.   bfd_byte *buf = NULL;
  248.   size_t bufsize;
  249.   int c;
  250.  
  251.   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
  252.     goto error_return;
  253.  
  254.   abfd->start_address = 0;
  255.  
  256.   segbase = 0;
  257.   extbase = 0;
  258.   sec = NULL;
  259.   lineno = 1;
  260.   error = FALSE;
  261.   bufsize = 0;
  262.  
  263.   while ((c = ihex_get_byte (abfd, &error)) != EOF)
  264.     {
  265.       if (c == '\r')
  266.         continue;
  267.       else if (c == '\n')
  268.         {
  269.           ++lineno;
  270.           continue;
  271.         }
  272.       else if (c != ':')
  273.         {
  274.           ihex_bad_byte (abfd, lineno, c, error);
  275.           goto error_return;
  276.         }
  277.       else
  278.         {
  279.           file_ptr pos;
  280.           char hdr[8];
  281.           unsigned int i;
  282.           unsigned int len;
  283.           bfd_vma addr;
  284.           unsigned int type;
  285.           unsigned int chars;
  286.           unsigned int chksum;
  287.  
  288.           /* This is a data record.  */
  289.           pos = bfd_tell (abfd) - 1;
  290.  
  291.           /* Read the header bytes.  */
  292.           if (bfd_bread (hdr, (bfd_size_type) 8, abfd) != 8)
  293.             goto error_return;
  294.  
  295.           for (i = 0; i < 8; i++)
  296.             {
  297.               if (! ISHEX (hdr[i]))
  298.                 {
  299.                   ihex_bad_byte (abfd, lineno, hdr[i], error);
  300.                   goto error_return;
  301.                 }
  302.             }
  303.  
  304.           len = HEX2 (hdr);
  305.           addr = HEX4 (hdr + 2);
  306.           type = HEX2 (hdr + 6);
  307.  
  308.           /* Read the data bytes.  */
  309.           chars = len * 2 + 2;
  310.           if (chars >= bufsize)
  311.             {
  312.               buf = (bfd_byte *) bfd_realloc (buf, (bfd_size_type) chars);
  313.               if (buf == NULL)
  314.                 goto error_return;
  315.               bufsize = chars;
  316.             }
  317.  
  318.           if (bfd_bread (buf, (bfd_size_type) chars, abfd) != chars)
  319.             goto error_return;
  320.  
  321.           for (i = 0; i < chars; i++)
  322.             {
  323.               if (! ISHEX (buf[i]))
  324.                 {
  325.                   ihex_bad_byte (abfd, lineno, hdr[i], error);
  326.                   goto error_return;
  327.                 }
  328.             }
  329.  
  330.           /* Check the checksum.  */
  331.           chksum = len + addr + (addr >> 8) + type;
  332.           for (i = 0; i < len; i++)
  333.             chksum += HEX2 (buf + 2 * i);
  334.           if (((- chksum) & 0xff) != (unsigned int) HEX2 (buf + 2 * i))
  335.             {
  336.               (*_bfd_error_handler)
  337.                 (_("%B:%u: bad checksum in Intel Hex file (expected %u, found %u)"),
  338.                  abfd, lineno,
  339.                  (- chksum) & 0xff, (unsigned int) HEX2 (buf + 2 * i));
  340.               bfd_set_error (bfd_error_bad_value);
  341.               goto error_return;
  342.             }
  343.  
  344.           switch (type)
  345.             {
  346.             case 0:
  347.               /* This is a data record.  */
  348.               if (sec != NULL
  349.                   && sec->vma + sec->size == extbase + segbase + addr)
  350.                 {
  351.                   /* This data goes at the end of the section we are
  352.                      currently building.  */
  353.                   sec->size += len;
  354.                 }
  355.               else if (len > 0)
  356.                 {
  357.                   char secbuf[20];
  358.                   char *secname;
  359.                   bfd_size_type amt;
  360.                   flagword flags;
  361.  
  362.                   sprintf (secbuf, ".sec%d", bfd_count_sections (abfd) + 1);
  363.                   amt = strlen (secbuf) + 1;
  364.                   secname = (char *) bfd_alloc (abfd, amt);
  365.                   if (secname == NULL)
  366.                     goto error_return;
  367.                   strcpy (secname, secbuf);
  368.                   flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
  369.                   sec = bfd_make_section_with_flags (abfd, secname, flags);
  370.                   if (sec == NULL)
  371.                     goto error_return;
  372.                   sec->vma = extbase + segbase + addr;
  373.                   sec->lma = extbase + segbase + addr;
  374.                   sec->size = len;
  375.                   sec->filepos = pos;
  376.                 }
  377.               break;
  378.  
  379.             case 1:
  380.               /* An end record.  */
  381.               if (abfd->start_address == 0)
  382.                 abfd->start_address = addr;
  383.               if (buf != NULL)
  384.                 free (buf);
  385.               return TRUE;
  386.  
  387.             case 2:
  388.               /* An extended address record.  */
  389.               if (len != 2)
  390.                 {
  391.                   (*_bfd_error_handler)
  392.                     (_("%B:%u: bad extended address record length in Intel Hex file"),
  393.                      abfd, lineno);
  394.                   bfd_set_error (bfd_error_bad_value);
  395.                   goto error_return;
  396.                 }
  397.  
  398.               segbase = HEX4 (buf) << 4;
  399.  
  400.               sec = NULL;
  401.  
  402.               break;
  403.  
  404.             case 3:
  405.               /* An extended start address record.  */
  406.               if (len != 4)
  407.                 {
  408.                   (*_bfd_error_handler)
  409.                     (_("%B:%u: bad extended start address length in Intel Hex file"),
  410.                      abfd, lineno);
  411.                   bfd_set_error (bfd_error_bad_value);
  412.                   goto error_return;
  413.                 }
  414.  
  415.               abfd->start_address += (HEX4 (buf) << 4) + HEX4 (buf + 4);
  416.  
  417.               sec = NULL;
  418.  
  419.               break;
  420.  
  421.             case 4:
  422.               /* An extended linear address record.  */
  423.               if (len != 2)
  424.                 {
  425.                   (*_bfd_error_handler)
  426.                     (_("%B:%u: bad extended linear address record length in Intel Hex file"),
  427.                      abfd, lineno);
  428.                   bfd_set_error (bfd_error_bad_value);
  429.                   goto error_return;
  430.                 }
  431.  
  432.               extbase = HEX4 (buf) << 16;
  433.  
  434.               sec = NULL;
  435.  
  436.               break;
  437.  
  438.             case 5:
  439.               /* An extended linear start address record.  */
  440.               if (len != 2 && len != 4)
  441.                 {
  442.                   (*_bfd_error_handler)
  443.                     (_("%B:%u: bad extended linear start address length in Intel Hex file"),
  444.                      abfd, lineno);
  445.                   bfd_set_error (bfd_error_bad_value);
  446.                   goto error_return;
  447.                 }
  448.  
  449.               if (len == 2)
  450.                 abfd->start_address += HEX4 (buf) << 16;
  451.               else
  452.                 abfd->start_address = (HEX4 (buf) << 16) + HEX4 (buf + 4);
  453.  
  454.               sec = NULL;
  455.  
  456.               break;
  457.  
  458.             default:
  459.               (*_bfd_error_handler)
  460.                 (_("%B:%u: unrecognized ihex type %u in Intel Hex file"),
  461.                  abfd, lineno, type);
  462.               bfd_set_error (bfd_error_bad_value);
  463.               goto error_return;
  464.             }
  465.         }
  466.     }
  467.  
  468.   if (error)
  469.     goto error_return;
  470.  
  471.   if (buf != NULL)
  472.     free (buf);
  473.  
  474.   return TRUE;
  475.  
  476.  error_return:
  477.   if (buf != NULL)
  478.     free (buf);
  479.   return FALSE;
  480. }
  481.  
  482. /* Try to recognize an Intel Hex file.  */
  483.  
  484. static const bfd_target *
  485. ihex_object_p (bfd *abfd)
  486. {
  487.   void * tdata_save;
  488.   bfd_byte b[9];
  489.   unsigned int i;
  490.   unsigned int type;
  491.  
  492.   ihex_init ();
  493.  
  494.   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
  495.     return NULL;
  496.   if (bfd_bread (b, (bfd_size_type) 9, abfd) != 9)
  497.     {
  498.       if (bfd_get_error () == bfd_error_file_truncated)
  499.         bfd_set_error (bfd_error_wrong_format);
  500.       return NULL;
  501.     }
  502.  
  503.   if (b[0] != ':')
  504.     {
  505.       bfd_set_error (bfd_error_wrong_format);
  506.       return NULL;
  507.     }
  508.  
  509.   for (i = 1; i < 9; i++)
  510.     {
  511.       if (! ISHEX (b[i]))
  512.         {
  513.           bfd_set_error (bfd_error_wrong_format);
  514.           return NULL;
  515.         }
  516.     }
  517.  
  518.   type = HEX2 (b + 7);
  519.   if (type > 5)
  520.     {
  521.       bfd_set_error (bfd_error_wrong_format);
  522.       return NULL;
  523.     }
  524.  
  525.   /* OK, it looks like it really is an Intel Hex file.  */
  526.   tdata_save = abfd->tdata.any;
  527.   if (! ihex_mkobject (abfd) || ! ihex_scan (abfd))
  528.     {
  529.       if (abfd->tdata.any != tdata_save && abfd->tdata.any != NULL)
  530.         bfd_release (abfd, abfd->tdata.any);
  531.       abfd->tdata.any = tdata_save;
  532.       return NULL;
  533.     }
  534.  
  535.   return abfd->xvec;
  536. }
  537.  
  538. /* Read the contents of a section in an Intel Hex file.  */
  539.  
  540. static bfd_boolean
  541. ihex_read_section (bfd *abfd, asection *section, bfd_byte *contents)
  542. {
  543.   int c;
  544.   bfd_byte *p;
  545.   bfd_byte *buf = NULL;
  546.   size_t bufsize;
  547.   bfd_boolean error;
  548.  
  549.   if (bfd_seek (abfd, section->filepos, SEEK_SET) != 0)
  550.     goto error_return;
  551.  
  552.   p = contents;
  553.   bufsize = 0;
  554.   error = FALSE;
  555.   while ((c = ihex_get_byte (abfd, &error)) != EOF)
  556.     {
  557.       char hdr[8];
  558.       unsigned int len;
  559.       unsigned int type;
  560.       unsigned int i;
  561.  
  562.       if (c == '\r' || c == '\n')
  563.         continue;
  564.  
  565.       /* This is called after ihex_scan has succeeded, so we ought to
  566.          know the exact format.  */
  567.       BFD_ASSERT (c == ':');
  568.  
  569.       if (bfd_bread (hdr, (bfd_size_type) 8, abfd) != 8)
  570.         goto error_return;
  571.  
  572.       len = HEX2 (hdr);
  573.       type = HEX2 (hdr + 6);
  574.  
  575.       /* We should only see type 0 records here.  */
  576.       if (type != 0)
  577.         {
  578.           (*_bfd_error_handler)
  579.             (_("%B: internal error in ihex_read_section"), abfd);
  580.           bfd_set_error (bfd_error_bad_value);
  581.           goto error_return;
  582.         }
  583.  
  584.       if (len * 2 > bufsize)
  585.         {
  586.           buf = (bfd_byte *) bfd_realloc (buf, (bfd_size_type) len * 2);
  587.           if (buf == NULL)
  588.             goto error_return;
  589.           bufsize = len * 2;
  590.         }
  591.  
  592.       if (bfd_bread (buf, (bfd_size_type) len * 2, abfd) != len * 2)
  593.         goto error_return;
  594.  
  595.       for (i = 0; i < len; i++)
  596.         *p++ = HEX2 (buf + 2 * i);
  597.       if ((bfd_size_type) (p - contents) >= section->size)
  598.         {
  599.           /* We've read everything in the section.  */
  600.           if (buf != NULL)
  601.             free (buf);
  602.           return TRUE;
  603.         }
  604.  
  605.       /* Skip the checksum.  */
  606.       if (bfd_bread (buf, (bfd_size_type) 2, abfd) != 2)
  607.         goto error_return;
  608.     }
  609.  
  610.   if ((bfd_size_type) (p - contents) < section->size)
  611.     {
  612.       (*_bfd_error_handler)
  613.         (_("%B: bad section length in ihex_read_section"), abfd);
  614.       bfd_set_error (bfd_error_bad_value);
  615.       goto error_return;
  616.     }
  617.  
  618.   if (buf != NULL)
  619.     free (buf);
  620.  
  621.   return TRUE;
  622.  
  623.  error_return:
  624.   if (buf != NULL)
  625.     free (buf);
  626.   return FALSE;
  627. }
  628.  
  629. /* Get the contents of a section in an Intel Hex file.  */
  630.  
  631. static bfd_boolean
  632. ihex_get_section_contents (bfd *abfd,
  633.                            asection *section,
  634.                            void * location,
  635.                            file_ptr offset,
  636.                            bfd_size_type count)
  637. {
  638.   if (section->used_by_bfd == NULL)
  639.     {
  640.       section->used_by_bfd = bfd_alloc (abfd, section->size);
  641.       if (section->used_by_bfd == NULL)
  642.         return FALSE;
  643.       if (! ihex_read_section (abfd, section,
  644.                                (bfd_byte *) section->used_by_bfd))
  645.         return FALSE;
  646.     }
  647.  
  648.   memcpy (location, (bfd_byte *) section->used_by_bfd + offset,
  649.           (size_t) count);
  650.  
  651.   return TRUE;
  652. }
  653.  
  654. /* Set the contents of a section in an Intel Hex file.  */
  655.  
  656. static bfd_boolean
  657. ihex_set_section_contents (bfd *abfd,
  658.                            asection *section,
  659.                            const void * location,
  660.                            file_ptr offset,
  661.                            bfd_size_type count)
  662. {
  663.   struct ihex_data_list *n;
  664.   bfd_byte *data;
  665.   struct ihex_data_struct *tdata;
  666.  
  667.   if (count == 0
  668.       || (section->flags & SEC_ALLOC) == 0
  669.       || (section->flags & SEC_LOAD) == 0)
  670.     return TRUE;
  671.  
  672.   n = (struct ihex_data_list *) bfd_alloc (abfd, sizeof (* n));
  673.   if (n == NULL)
  674.     return FALSE;
  675.  
  676.   data = (bfd_byte *) bfd_alloc (abfd, count);
  677.   if (data == NULL)
  678.     return FALSE;
  679.   memcpy (data, location, (size_t) count);
  680.  
  681.   n->data = data;
  682.   n->where = section->lma + offset;
  683.   n->size = count;
  684.  
  685.   /* Sort the records by address.  Optimize for the common case of
  686.      adding a record to the end of the list.  */
  687.   tdata = abfd->tdata.ihex_data;
  688.   if (tdata->tail != NULL
  689.       && n->where >= tdata->tail->where)
  690.     {
  691.       tdata->tail->next = n;
  692.       n->next = NULL;
  693.       tdata->tail = n;
  694.     }
  695.   else
  696.     {
  697.       struct ihex_data_list **pp;
  698.  
  699.       for (pp = &tdata->head;
  700.            *pp != NULL && (*pp)->where < n->where;
  701.            pp = &(*pp)->next)
  702.         ;
  703.       n->next = *pp;
  704.       *pp = n;
  705.       if (n->next == NULL)
  706.         tdata->tail = n;
  707.     }
  708.  
  709.   return TRUE;
  710. }
  711.  
  712. /* Write a record out to an Intel Hex file.  */
  713.  
  714. static bfd_boolean
  715. ihex_write_record (bfd *abfd,
  716.                    size_t count,
  717.                    unsigned int addr,
  718.                    unsigned int type,
  719.                    bfd_byte *data)
  720. {
  721.   static const char digs[] = "0123456789ABCDEF";
  722.   char buf[9 + CHUNK * 2 + 4];
  723.   char *p;
  724.   unsigned int chksum;
  725.   unsigned int i;
  726.   size_t total;
  727.  
  728. #define TOHEX(buf, v) \
  729.   ((buf)[0] = digs[((v) >> 4) & 0xf], (buf)[1] = digs[(v) & 0xf])
  730.  
  731.   buf[0] = ':';
  732.   TOHEX (buf + 1, count);
  733.   TOHEX (buf + 3, (addr >> 8) & 0xff);
  734.   TOHEX (buf + 5, addr & 0xff);
  735.   TOHEX (buf + 7, type);
  736.  
  737.   chksum = count + addr + (addr >> 8) + type;
  738.  
  739.   for (i = 0, p = buf + 9; i < count; i++, p += 2, data++)
  740.     {
  741.       TOHEX (p, *data);
  742.       chksum += *data;
  743.     }
  744.  
  745.   TOHEX (p, (- chksum) & 0xff);
  746.   p[2] = '\r';
  747.   p[3] = '\n';
  748.  
  749.   total = 9 + count * 2 + 4;
  750.   if (bfd_bwrite (buf, (bfd_size_type) total, abfd) != total)
  751.     return FALSE;
  752.  
  753.   return TRUE;
  754. }
  755.  
  756. /* Write out an Intel Hex file.  */
  757.  
  758. static bfd_boolean
  759. ihex_write_object_contents (bfd *abfd)
  760. {
  761.   bfd_vma segbase;
  762.   bfd_vma extbase;
  763.   struct ihex_data_list *l;
  764.  
  765.   segbase = 0;
  766.   extbase = 0;
  767.   for (l = abfd->tdata.ihex_data->head; l != NULL; l = l->next)
  768.     {
  769.       bfd_vma where;
  770.       bfd_byte *p;
  771.       bfd_size_type count;
  772.  
  773.       where = l->where;
  774.       p = l->data;
  775.       count = l->size;
  776.  
  777.       while (count > 0)
  778.         {
  779.           size_t now;
  780.           unsigned int rec_addr;
  781.  
  782.           now = count;
  783.           if (count > CHUNK)
  784.             now = CHUNK;
  785.  
  786.           if (where > segbase + extbase + 0xffff)
  787.             {
  788.               bfd_byte addr[2];
  789.  
  790.               /* We need a new base address.  */
  791.               if (where <= 0xfffff)
  792.                 {
  793.                   /* The addresses should be sorted.  */
  794.                   BFD_ASSERT (extbase == 0);
  795.  
  796.                   segbase = where & 0xf0000;
  797.                   addr[0] = (bfd_byte)(segbase >> 12) & 0xff;
  798.                   addr[1] = (bfd_byte)(segbase >> 4) & 0xff;
  799.                   if (! ihex_write_record (abfd, 2, 0, 2, addr))
  800.                     return FALSE;
  801.                 }
  802.               else
  803.                 {
  804.                   /* The extended address record and the extended
  805.                      linear address record are combined, at least by
  806.                      some readers.  We need an extended linear address
  807.                      record here, so if we've already written out an
  808.                      extended address record, zero it out to avoid
  809.                      confusion.  */
  810.                   if (segbase != 0)
  811.                     {
  812.                       addr[0] = 0;
  813.                       addr[1] = 0;
  814.                       if (! ihex_write_record (abfd, 2, 0, 2, addr))
  815.                         return FALSE;
  816.                       segbase = 0;
  817.                     }
  818.  
  819.                   extbase = where & 0xffff0000;
  820.                   if (where > extbase + 0xffff)
  821.                     {
  822.                       char buf[20];
  823.  
  824.                       sprintf_vma (buf, where);
  825.                       (*_bfd_error_handler)
  826.                         (_("%s: address 0x%s out of range for Intel Hex file"),
  827.                          bfd_get_filename (abfd), buf);
  828.                       bfd_set_error (bfd_error_bad_value);
  829.                       return FALSE;
  830.                     }
  831.                   addr[0] = (bfd_byte)(extbase >> 24) & 0xff;
  832.                   addr[1] = (bfd_byte)(extbase >> 16) & 0xff;
  833.                   if (! ihex_write_record (abfd, 2, 0, 4, addr))
  834.                     return FALSE;
  835.                 }
  836.             }
  837.  
  838.           rec_addr = where - (extbase + segbase);
  839.  
  840.           /* Output records shouldn't cross 64K boundaries.  */
  841.           if (rec_addr + now > 0xffff)
  842.             now = 0x10000 - rec_addr;
  843.  
  844.           if (! ihex_write_record (abfd, now, rec_addr, 0, p))
  845.             return FALSE;
  846.  
  847.           where += now;
  848.           p += now;
  849.           count -= now;
  850.         }
  851.     }
  852.  
  853.   if (abfd->start_address != 0)
  854.     {
  855.       bfd_vma start;
  856.       bfd_byte startbuf[4];
  857.  
  858.       start = abfd->start_address;
  859.  
  860.       if (start <= 0xfffff)
  861.         {
  862.           startbuf[0] = (bfd_byte)((start & 0xf0000) >> 12) & 0xff;
  863.           startbuf[1] = 0;
  864.           startbuf[2] = (bfd_byte)(start >> 8) & 0xff;
  865.           startbuf[3] = (bfd_byte)start & 0xff;
  866.           if (! ihex_write_record (abfd, 4, 0, 3, startbuf))
  867.             return FALSE;
  868.         }
  869.       else
  870.         {
  871.           startbuf[0] = (bfd_byte)(start >> 24) & 0xff;
  872.           startbuf[1] = (bfd_byte)(start >> 16) & 0xff;
  873.           startbuf[2] = (bfd_byte)(start >> 8) & 0xff;
  874.           startbuf[3] = (bfd_byte)start & 0xff;
  875.           if (! ihex_write_record (abfd, 4, 0, 5, startbuf))
  876.             return FALSE;
  877.         }
  878.     }
  879.  
  880.   if (! ihex_write_record (abfd, 0, 0, 1, NULL))
  881.     return FALSE;
  882.  
  883.   return TRUE;
  884. }
  885.  
  886. /* Set the architecture for the output file.  The architecture is
  887.    irrelevant, so we ignore errors about unknown architectures.  */
  888.  
  889. static bfd_boolean
  890. ihex_set_arch_mach (bfd *abfd,
  891.                     enum bfd_architecture arch,
  892.                     unsigned long mach)
  893. {
  894.   if (! bfd_default_set_arch_mach (abfd, arch, mach))
  895.     {
  896.       if (arch != bfd_arch_unknown)
  897.         return FALSE;
  898.     }
  899.   return TRUE;
  900. }
  901.  
  902. /* Get the size of the headers, for the linker.  */
  903.  
  904. static int
  905. ihex_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
  906.                      struct bfd_link_info *info ATTRIBUTE_UNUSED)
  907. {
  908.   return 0;
  909. }
  910.  
  911. /* Some random definitions for the target vector.  */
  912.  
  913. #define ihex_close_and_cleanup                    _bfd_generic_close_and_cleanup
  914. #define ihex_bfd_free_cached_info                 _bfd_generic_bfd_free_cached_info
  915. #define ihex_new_section_hook                     _bfd_generic_new_section_hook
  916. #define ihex_get_section_contents_in_window       _bfd_generic_get_section_contents_in_window
  917. #define ihex_get_symtab_upper_bound               bfd_0l
  918. #define ihex_canonicalize_symtab                  ((long (*) (bfd *, asymbol **)) bfd_0l)
  919. #define ihex_make_empty_symbol                    _bfd_generic_make_empty_symbol
  920. #define ihex_print_symbol                         _bfd_nosymbols_print_symbol
  921. #define ihex_get_symbol_info                      _bfd_nosymbols_get_symbol_info
  922. #define ihex_bfd_is_target_special_symbol         ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
  923. #define ihex_bfd_is_local_label_name              _bfd_nosymbols_bfd_is_local_label_name
  924. #define ihex_get_lineno                           _bfd_nosymbols_get_lineno
  925. #define ihex_find_nearest_line                    _bfd_nosymbols_find_nearest_line
  926. #define ihex_find_inliner_info                    _bfd_nosymbols_find_inliner_info
  927. #define ihex_bfd_make_debug_symbol                _bfd_nosymbols_bfd_make_debug_symbol
  928. #define ihex_read_minisymbols                     _bfd_nosymbols_read_minisymbols
  929. #define ihex_minisymbol_to_symbol                 _bfd_nosymbols_minisymbol_to_symbol
  930. #define ihex_bfd_get_relocated_section_contents   bfd_generic_get_relocated_section_contents
  931. #define ihex_bfd_relax_section                    bfd_generic_relax_section
  932. #define ihex_bfd_gc_sections                      bfd_generic_gc_sections
  933. #define ihex_bfd_lookup_section_flags             bfd_generic_lookup_section_flags
  934. #define ihex_bfd_merge_sections                   bfd_generic_merge_sections
  935. #define ihex_bfd_is_group_section                 bfd_generic_is_group_section
  936. #define ihex_bfd_discard_group                    bfd_generic_discard_group
  937. #define ihex_section_already_linked               _bfd_generic_section_already_linked
  938. #define ihex_bfd_define_common_symbol             bfd_generic_define_common_symbol
  939. #define ihex_bfd_link_hash_table_create           _bfd_generic_link_hash_table_create
  940. #define ihex_bfd_link_hash_table_free             _bfd_generic_link_hash_table_free
  941. #define ihex_bfd_link_add_symbols                 _bfd_generic_link_add_symbols
  942. #define ihex_bfd_link_just_syms                   _bfd_generic_link_just_syms
  943. #define ihex_bfd_copy_link_hash_symbol_type \
  944.   _bfd_generic_copy_link_hash_symbol_type
  945. #define ihex_bfd_final_link                       _bfd_generic_final_link
  946. #define ihex_bfd_link_split_section               _bfd_generic_link_split_section
  947.  
  948. /* The Intel Hex target vector.  */
  949.  
  950. const bfd_target ihex_vec =
  951. {
  952.   "ihex",                       /* Name.  */
  953.   bfd_target_ihex_flavour,
  954.   BFD_ENDIAN_UNKNOWN,           /* Target byte order.  */
  955.   BFD_ENDIAN_UNKNOWN,           /* Target headers byte order.  */
  956.   0,                            /* Object flags.  */
  957.   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD),    /* Section flags.  */
  958.   0,                            /* Leading underscore.  */
  959.   ' ',                          /* AR_pad_char.  */
  960.   16,                           /* AR_max_namelen.  */
  961.   0,                            /* match priority.  */
  962.   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  963.   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  964.   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
  965.   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  966.   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  967.   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers. */
  968.  
  969.   {
  970.     _bfd_dummy_target,
  971.     ihex_object_p,              /* bfd_check_format.  */
  972.     _bfd_dummy_target,
  973.     _bfd_dummy_target,
  974.   },
  975.   {
  976.     bfd_false,
  977.     ihex_mkobject,
  978.     _bfd_generic_mkarchive,
  979.     bfd_false,
  980.   },
  981.   {                             /* bfd_write_contents.  */
  982.     bfd_false,
  983.     ihex_write_object_contents,
  984.     _bfd_write_archive_contents,
  985.     bfd_false,
  986.   },
  987.  
  988.   BFD_JUMP_TABLE_GENERIC (ihex),
  989.   BFD_JUMP_TABLE_COPY (_bfd_generic),
  990.   BFD_JUMP_TABLE_CORE (_bfd_nocore),
  991.   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
  992.   BFD_JUMP_TABLE_SYMBOLS (ihex),
  993.   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
  994.   BFD_JUMP_TABLE_WRITE (ihex),
  995.   BFD_JUMP_TABLE_LINK (ihex),
  996.   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
  997.  
  998.   NULL,
  999.  
  1000.   NULL
  1001. };
  1002.