/* BFD backend for Extended Tektronix Hex Format  objects.

   Copyright (C) 1992-2026 Free Software Foundation, Inc.

   Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.

   This file is part of BFD, the Binary File Descriptor library.

   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.  */

/* SUBSECTION

  Tektronix Hex Format handling

   DESCRIPTION

  Tek Hex records can hold symbols and data, but not

  relocations. Their main application is communication with

  devices like PROM programmers and ICE equipment.

  It seems that the sections are described as being really big,

  the example I have says that the text section is 0..ffffffff.

  BFD would barf with this, many apps would try to alloc 4GB to

  read in the file.

  Tex Hex may contain many sections, but the data which comes in

  has no tag saying which section it belongs to, so we create

  one section for each block of data, called "blknnnn" which we

  stick all the data into.

  TekHex may come out of order and there is no header, so an

  initial scan is required  to discover the minimum and maximum

  addresses used to create the vma and size of the sections we

  create.

  We read in the data into pages of CHUNK_MASK+1 size and read

  them out from that whenever we need to.

  Any number of sections may be created for output, we save them

  up and output them when it's time to close the bfd.

  A TekHex record looks like:

  EXAMPLE

  %<block length><type><checksum><stuff><cr>

  DESCRIPTION

  Where

  o length

  is the number of bytes in the record not including the % sign.

  o type

  is one of:

  3) symbol record

  6) data record

  8) termination record

  The data can come out of order, and may be discontigous. This is a

  serial protocol, so big files are unlikely, so we keep a list of 8k chunks.  */

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

#include "libiberty.h"

typedef struct

{

  bfd_vma low;

  bfd_vma high;

} addr_range_type;

typedef struct tekhex_symbol_struct

{

  asymbol symbol;

  struct tekhex_symbol_struct *prev;

} tekhex_symbol_type;

static const char digs[] = "0123456789ABCDEF";

static char sum_block[256];

#define NOT_HEX      20

#define NIBBLE(x)    hex_value(x)

#define HEX(buffer) ((NIBBLE ((buffer)[0]) << 4) + NIBBLE ((buffer)[1]))

#define ISHEX(x)    hex_p(x)

#define TOHEX(d, x) \

  (d)[1] = digs[(x) & 0xf]; \

  (d)[0] = digs[((x)>>4)&0xf];

/* Here's an example

   %3A6C6480004E56FFFC4E717063B0AEFFFC6D0652AEFFFC60F24E5E4E75

   %1B3709T_SEGMENT1108FFFFFFFF

   %2B3AB9T_SEGMENT7Dgcc_compiled$1087hello$c10

   %373829T_SEGMENT80int$t1$r1$$214741080char$t2$r2$0$12710

   %373769T_SEGMENT80long$int$t3$r1$$1080unsigned$int$t4$10

   %373CA9T_SEGMENT80long$unsigned$in1080short$int$t6$r1$10

   %373049T_SEGMENT80long$long$int$t71080short$unsigned$i10

   %373A29T_SEGMENT80long$long$unsign1080signed$char$t10$10

   %373D69T_SEGMENT80unsigned$char$t11080float$t12$r1$4$010

   %373D19T_SEGMENT80double$t13$r1$8$1080long$double$t14$10

   %2734D9T_SEGMENT8Bvoid$t15$151035_main10

   %2F3CA9T_SEGMENT81$1081$1681$1E81$21487main$F110

   %2832F9T_SEGMENT83i$18FFFFFFFC81$1481$214

   %07 8 10 10

   explanation:

   %3A6C6480004E56FFFC4E717063B0AEFFFC6D0652AEFFFC60F24E5E4E75

    ^ ^^ ^     ^-data

    | || +------ 4 char integer 0x8000

    | |+-------- checksum

    | +--------- type 6 (data record)

    +----------- length 3a chars

   <---------------------- 3a (58 chars) ------------------->

   %1B3709T_SEGMENT1108FFFFFFFF

   ^         ^^ ^- 8 character integer 0xffffffff

   |         |+-   1 character integer 0

   |         +--   type 1 symbol (section definition)

   +------------   9 char symbol T_SEGMENT

   %2B3AB9T_SEGMENT7Dgcc_compiled$1087hello$c10

   %373829T_SEGMENT80int$t1$r1$$214741080char$t2$r2$0$12710

   %373769T_SEGMENT80long$int$t3$r1$$1080unsigned$int$t4$10

   %373CA9T_SEGMENT80long$unsigned$in1080short$int$t6$r1$10

   %373049T_SEGMENT80long$long$int$t71080short$unsigned$i10

   %373A29T_SEGMENT80long$long$unsign1080signed$char$t10$10

   %373D69T_SEGMENT80unsigned$char$t11080float$t12$r1$4$010

   %373D19T_SEGMENT80double$t13$r1$8$1080long$double$t14$10

   %2734D9T_SEGMENT8Bvoid$t15$151035_main10

   %2F3CA9T_SEGMENT81$1081$1681$1E81$21487main$F110

   %2832F9T_SEGMENT83i$18FFFFFFFC81$1481$214

   %0781010

   Turns into

   sac@thepub$ ./objdump -dx -m m68k f

   f:     file format tekhex

   -----x--- 9/55728 -134219416 Sep 29 15:13 1995 f

   architecture: UNKNOWN!, flags 0x00000010:

   HAS_SYMS

   start address 0x00000000

   SECTION 0 [D00000000]  : size 00020000 vma 00000000 align 2**0

   ALLOC, LOAD

   SECTION 1 [D00008000]  : size 00002001 vma 00008000 align 2**0

   SECTION 2 [T_SEGMENT]  : size ffffffff vma 00000000 align 2**0

   SYMBOL TABLE:

   00000000  g       T_SEGMENT gcc_compiled$

   00000000  g       T_SEGMENT hello$c

   00000000  g       T_SEGMENT int$t1$r1$$21474

   00000000  g       T_SEGMENT char$t2$r2$0$127

   00000000  g       T_SEGMENT long$int$t3$r1$$

   00000000  g       T_SEGMENT unsigned$int$t4$

   00000000  g       T_SEGMENT long$unsigned$in

   00000000  g       T_SEGMENT short$int$t6$r1$

   00000000  g       T_SEGMENT long$long$int$t7

   00000000  g       T_SEGMENT short$unsigned$i

   00000000  g       T_SEGMENT long$long$unsign

   00000000  g       T_SEGMENT signed$char$t10$

   00000000  g       T_SEGMENT unsigned$char$t1

   00000000  g       T_SEGMENT float$t12$r1$4$0

   00000000  g       T_SEGMENT double$t13$r1$8$

   00000000  g       T_SEGMENT long$double$t14$

   00000000  g       T_SEGMENT void$t15$15

   00000000  g       T_SEGMENT _main

   00000000  g       T_SEGMENT $

   00000000  g       T_SEGMENT $

   00000000  g       T_SEGMENT $

   00000010  g       T_SEGMENT $

   00000000  g       T_SEGMENT main$F1

   fcffffff  g       T_SEGMENT i$1

   00000000  g       T_SEGMENT $

   00000010  g       T_SEGMENT $

   RELOCATION RECORDS FOR [D00000000]: (none)

   RELOCATION RECORDS FOR [D00008000]: (none)

   RELOCATION RECORDS FOR [T_SEGMENT]: (none)

   Disassembly of section D00000000:

   ...

   00008000 ($+)7ff0 linkw fp,#-4

   00008004 ($+)7ff4 nop

   00008006 ($+)7ff6 movel #99,d0

   00008008 ($+)7ff8 cmpl fp@(-4),d0

   0000800c ($+)7ffc blts 00008014 ($+)8004

   0000800e ($+)7ffe addql #1,fp@(-4)

   00008012 ($+)8002 bras 00008006 ($+)7ff6

   00008014 ($+)8004 unlk fp

   00008016 ($+)8006 rts

   ...  */

static void

tekhex_init (void)

{

  unsigned int i;

  static bool inited = false;

  int val;

  if (! inited)

    {

      inited = true;

      hex_init ();

      val = 0;

      for (i = 0; i < 10; i++)

  sum_block[i + '0'] = val++;

      for (i = 'A'; i <= 'Z'; i++)

  sum_block[i] = val++;

      sum_block['$'] = val++;

      sum_block['%'] = val++;

      sum_block['.'] = val++;

      sum_block['_'] = val++;

      for (i = 'a'; i <= 'z'; i++)

  sum_block[i] = val++;

    }

}

/* The maximum number of bytes on a line is FF.  */

#define MAXCHUNK 0xff

/* The number of bytes we fit onto a line on output.  */

#define CHUNK 21

/* We cannot output our tekhexords as we see them, we have to glue them

   together, this is done in this structure : */

struct tekhex_data_list_struct

{

  unsigned char *data;

  bfd_vma where;

  bfd_size_type size;

  struct tekhex_data_list_struct *next;

};

typedef struct tekhex_data_list_struct tekhex_data_list_type;

#define CHUNK_MASK 0x1fff

#define CHUNK_SPAN 32

struct data_struct

{

  unsigned char chunk_data[CHUNK_MASK + 1];

  unsigned char chunk_init[(CHUNK_MASK + 1 + CHUNK_SPAN - 1) / CHUNK_SPAN];

  bfd_vma vma;

  struct data_struct *next;

};

typedef struct tekhex_data_struct

{

  tekhex_data_list_type *head;

  unsigned int type;

  struct tekhex_symbol_struct *symbols;

  struct data_struct *data;

} tdata_type;

#define enda(x) (x->vma + x->size)

static bool

getvalue (char **srcp, bfd_vma *valuep, char * endp)

{

  char *src = *srcp;

  bfd_vma value = 0;

  unsigned int len;

  if (src >= endp)

    return false;

  if (!ISHEX (*src))

    return false;

  len = hex_value (*src++);

  if (len == 0)

    len = 16;

  while (len-- && src < endp)

    {

      if (!ISHEX (*src))

  return false;

      value = value << 4 | hex_value (*src++);

    }

  *srcp = src;

  *valuep = value;

  return len == -1U;

}

static bool

getsym (char *dstp, char **srcp, unsigned int *lenp, char * endp)

{

  char *src = *srcp;

  unsigned int i;

  unsigned int len;

  if (!ISHEX (*src))

    return false;

  len = hex_value (*src++);

  if (len == 0)

    len = 16;

  for (i = 0; i < len && (src + i) < endp; i++)

    dstp[i] = src[i];

  dstp[i] = 0;

  *srcp = src + i;

  *lenp = len;

  return i == len;

}

static struct data_struct *

find_chunk (bfd *abfd, bfd_vma vma, bool create)

{

  struct data_struct *d = abfd->tdata.tekhex_data->data;

  vma &= ~CHUNK_MASK;

  while (d && (d->vma) != vma)

    d = d->next;

  if (!d && create)

    {

      /* No chunk for this address, so make one up.  */

      d = bfd_zalloc (abfd, sizeof (struct data_struct));

      if (!d)

  return NULL;

      d->next = abfd->tdata.tekhex_data->data;

      d->vma = vma;

      abfd->tdata.tekhex_data->data = d;

    }

  return d;

}

static bool

insert_byte (bfd *abfd, int value, bfd_vma addr)

{

  if (value != 0)

    {

      /* Find the chunk that this byte needs and put it in.  */

      struct data_struct *d = find_chunk (abfd, addr, true);

      if (!d)

  return false;

      d->chunk_data[addr & CHUNK_MASK] = value;

      d->chunk_init[(addr & CHUNK_MASK) / CHUNK_SPAN] = 1;

    }

  return true;

}

/* The first pass is to find the names of all the sections, and see

  how big the data is.  */

static bool

first_phase (bfd *abfd, int type, char *src, char * src_end)

{

  asection *section, *alt_section;

  unsigned int len;

  bfd_vma addr;

  bfd_vma val;

  char sym[17];     /* A symbol can only be 16chars long.  */

  switch (type)

    {

    case '6':

      /* Data record - read it and store it.  */

      if (!getvalue (&src, &addr, src_end))

  return false;

      while (*src && src < src_end - 1)

  {

    if (!insert_byte (abfd, HEX (src), addr))

      return false;

    src += 2;

    addr++;

  }

      return true;

    case '3':

      /* Symbol record, read the segment.  */

      if (!getsym (sym, &src, &len, src_end))

  return false;

      section = bfd_get_section_by_name (abfd, sym);

      if (section == NULL)

  {

    char *n = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1);

    if (!n)

      return false;

    memcpy (n, sym, len + 1);

    section = bfd_make_section_old_way (abfd, n);

    if (section == NULL)

      return false;

  }

      alt_section = NULL;

      while (src < src_end && *src)

  {

    switch (*src)

      {

      case '1':   /* Section range.  */

        src++;

        if (!getvalue (&src, &addr, src_end))

    return false;

        if (!getvalue (&src, &val, src_end))

    return false;

        if (bfd_is_const_section (section))

    break;

        section->vma = addr;

        if (val < addr)

    val = addr;

        section->size = val - addr;

        /* PR 17512: file: objdump-s-endless-loop.tekhex.

     Check for overlarge section sizes.  */

        if (section->size & 0x80000000)

    return false;

        section->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;

        break;

      case '0':

      case '2':

      case '3':

      case '4':

      case '6':

      case '7':

      case '8':

        /* Symbols, add to section.  */

        {

    size_t amt = sizeof (tekhex_symbol_type);

    tekhex_symbol_type *new_symbol = (tekhex_symbol_type *)

        bfd_alloc (abfd, amt);

    char stype = (*src);

    if (!new_symbol)

      return false;

    new_symbol->symbol.the_bfd = abfd;

    src++;

    abfd->symcount++;

    abfd->flags |= HAS_SYMS;

    new_symbol->prev = abfd->tdata.tekhex_data->symbols;

    abfd->tdata.tekhex_data->symbols = new_symbol;

    if (!getsym (sym, &src, &len, src_end))

      return false;

    new_symbol->symbol.name = (const char *)

        bfd_alloc (abfd, (bfd_size_type) len + 1);

    if (!new_symbol->symbol.name)

      return false;

    memcpy ((char *) (new_symbol->symbol.name), sym, len + 1);

    new_symbol->symbol.section = section;

    if (stype <= '4')

      new_symbol->symbol.flags = (BSF_GLOBAL | BSF_EXPORT);

    else

      new_symbol->symbol.flags = BSF_LOCAL;

    if (stype == '2' || stype == '6')

      new_symbol->symbol.section = bfd_abs_section_ptr;

    else if (bfd_is_const_section (section))

      ;

    else if (stype == '3' || stype == '7')

      {

        if ((section->flags & SEC_DATA) == 0)

          section->flags |= SEC_CODE;

        else

          {

      if (alt_section == NULL)

        alt_section

          = bfd_get_next_section_by_name (NULL, section);

      if (alt_section == NULL)

        alt_section = bfd_make_section_anyway_with_flags

          (abfd, section->name,

           (section->flags & ~SEC_DATA) | SEC_CODE);

      if (alt_section == NULL)

        return false;

      new_symbol->symbol.section = alt_section;

          }

      }

    else if (stype == '4' || stype == '8')

      {

        if ((section->flags & SEC_CODE) == 0)

          section->flags |= SEC_DATA;

        else

          {

      if (alt_section == NULL)

        alt_section

          = bfd_get_next_section_by_name (NULL, section);

      if (alt_section == NULL)

        alt_section = bfd_make_section_anyway_with_flags

          (abfd, section->name,

           (section->flags & ~SEC_CODE) | SEC_DATA);

      if (alt_section == NULL)

        return false;

      new_symbol->symbol.section = alt_section;

          }

      }

    if (!getvalue (&src, &val, src_end))

      return false;

    new_symbol->symbol.value = val - section->vma;

    break;

        }

      default:

        return false;

      }

  }

    }

  return true;

}

/* Pass over a tekhex, calling one of the above functions on each

   record.  */

static bool

pass_over (bfd *abfd, bool (*func) (bfd *, int, char *, char *))

{

  unsigned int chars_on_line;

  bool is_eof = false;

  /* To the front of the file.  */

  if (bfd_seek (abfd, 0, SEEK_SET) != 0)

    return false;

  while (! is_eof)

    {

      char src[MAXCHUNK];

      char type;

      /* Find first '%'.  */

      is_eof = bfd_read (src, 1, abfd) != 1;

      while (!is_eof && *src != '%')

  is_eof = bfd_read (src, 1, abfd) != 1;

      if (is_eof)

  break;

      /* Fetch the type and the length and the checksum.  */

      if (bfd_read (src, 5, abfd) != 5)

  return false;

      type = src[2];

      if (!ISHEX (src[0]) || !ISHEX (src[1]))

  break;

      /* Already read five chars.  */

      chars_on_line = HEX (src) - 5;

      if (chars_on_line >= MAXCHUNK)

  return false;

      if (bfd_read (src, chars_on_line, abfd) != chars_on_line)

  return false;

      /* Put a null at the end.  */

      src[chars_on_line] = 0;

      if (!func (abfd, type, src, src + chars_on_line))

  return false;

    }

  return true;

}

static long

tekhex_canonicalize_symtab (bfd *abfd, asymbol **table)

{

  tekhex_symbol_type *p = abfd->tdata.tekhex_data->symbols;

  unsigned int c = bfd_get_symcount (abfd);

  table[c] = 0;

  while (p)

    {

      table[--c] = &(p->symbol);

      p = p->prev;

    }

  return bfd_get_symcount (abfd);

}

static long

tekhex_get_symtab_upper_bound (bfd *abfd)

{

  return (abfd->symcount + 1) * (sizeof (struct tekhex_asymbol_struct *));

}

static bool

tekhex_mkobject (bfd *abfd)

{

  tdata_type *tdata;

  tdata = (tdata_type *) bfd_alloc (abfd, (bfd_size_type) sizeof (tdata_type));

  if (!tdata)

    return false;

  abfd->tdata.tekhex_data = tdata;

  tdata->type = 1;

  tdata->head =  NULL;

  tdata->symbols = NULL;

  tdata->data = NULL;

  return true;

}

/* Return TRUE if the file looks like it's in TekHex format. Just look

   for a percent sign and some hex digits.  */

static bfd_cleanup

tekhex_object_p (bfd *abfd)

{

  char b[4];

  tekhex_init ();

  if (bfd_seek (abfd, 0, SEEK_SET) != 0

      || bfd_read (b, 4, abfd) != 4)

    return NULL;

  if (b[0] != '%' || !ISHEX (b[1]) || !ISHEX (b[2]) || !ISHEX (b[3]))

    return NULL;

  if (!tekhex_mkobject (abfd))

    return NULL;

  if (!pass_over (abfd, first_phase))

    {

      bfd_release (abfd, abfd->tdata.tekhex_data);

      return NULL;

    }

  return _bfd_no_cleanup;

}

static bool

move_section_contents (bfd *abfd,

           asection *section,

           const void * locationp,

           file_ptr offset,

           bfd_size_type count,

           bool get)

{

  bfd_vma addr;

  char *location = (char *) locationp;

  bfd_vma prev_number = 1;  /* Nothing can have this as a high bit.  */

  struct data_struct *d = NULL;

  BFD_ASSERT (offset == 0);

  for (addr = section->vma; count != 0; count--, addr++)

    {

      /* Get high bits of address.  */

      bfd_vma chunk_number = addr & ~(bfd_vma) CHUNK_MASK;

      bfd_vma low_bits = addr & CHUNK_MASK;

      bool must_write = !get && *location != 0;

      if (chunk_number != prev_number || (!d && must_write))

  {

    /* Different chunk, so move pointer. */

    d = find_chunk (abfd, chunk_number, must_write);

    if (!d && must_write)

      return false;

    prev_number = chunk_number;

  }

      if (get)

  {

    if (d)

      *location = d->chunk_data[low_bits];

    else

      *location = 0;

  }

      else if (must_write)

  {

    d->chunk_data[low_bits] = *location;

    d->chunk_init[low_bits / CHUNK_SPAN] = 1;

  }

      location++;

    }

  return true;

}

static bool

tekhex_get_section_contents (bfd *abfd,

           asection *section,

           void *location,

           file_ptr offset,

           bfd_size_type count)

{

  if ((section->flags & (SEC_LOAD | SEC_ALLOC)) == 0)

    return false;

  return move_section_contents (abfd, section, location, offset, count, true);

}

static bool

tekhex_set_arch_mach (bfd *abfd,

          enum bfd_architecture arch,

          unsigned long machine)

{

  /* Ignore errors about unknown architecture.  */

  return (bfd_default_set_arch_mach (abfd, arch, machine)

    || arch == bfd_arch_unknown);

}

/* We have to save up all the Tekhexords for a splurge before output.  */

static bool

tekhex_set_section_contents (bfd *abfd,

           sec_ptr section,

           const void *location,

           file_ptr offset,

           bfd_size_type count)

{

  if ((section->flags & (SEC_LOAD | SEC_ALLOC)) == 0)

    return false;

  return move_section_contents (abfd, section, location, offset, count, false);

}

static void

writevalue (char **dst, bfd_vma value)

{

  char *p = *dst;

  int len;

  int shift;

  for (len = BFD_ARCH_SIZE / 4, shift = len * 4 - 4; len > 1; shift -= 4, len--)

    if ((value >> shift) & 0xf)

      break;

  *p++ = digs[len & 0xf];

  for (; len; shift -= 4, len--)

    *p++ = digs[(value >> shift) & 0xf];

  *dst = p;

}

static void

writesym (char **dst, const char *sym)

{

  char *p = *dst;

  int len = (sym ? strlen (sym) : 0);

  if (len >= 16)

    len = 16;

  else if (len == 0)

    {

      len = 1;

      sym = "$";

    }

  *p++ = digs[len & 0xf];

  while (len--)

    *p++ = *sym++;

  *dst = p;

}

static void

out (bfd *abfd, int type, char *start, char *end)

{

  int sum = 0;

  char *s;

  char front[6];

  bfd_size_type wrlen;

  front[0] = '%';

  TOHEX (front + 1, end - start + 5);

  front[3] = type;

  for (s = start; s < end; s++)

    sum += sum_block[(unsigned char) *s];

  sum += sum_block[(unsigned char) front[1]]; /* Length.  */

  sum += sum_block[(unsigned char) front[2]];

  sum += sum_block[(unsigned char) front[3]]; /* Type.  */

  TOHEX (front + 4, sum);

  if (bfd_write (front, 6, abfd) != 6)

    abort ();

  end[0] = '\n';

  wrlen = end - start + 1;

  if (bfd_write (start, wrlen, abfd) != wrlen)

    abort ();

}

static bool

tekhex_write_object_contents (bfd *abfd)

{

  char buffer[100];

  asymbol **p;

  asection *s;

  struct data_struct *d;

  tekhex_init ();

  /* And the raw data.  */

  for (d = abfd->tdata.tekhex_data->data;

       d != NULL;

       d = d->next)

    {

      int low;

      int addr;

      /* Write it in blocks of 32 bytes.  */

      for (addr = 0; addr < CHUNK_MASK + 1; addr += CHUNK_SPAN)

  {

    if (d->chunk_init[addr / CHUNK_SPAN])

      {

        char *dst = buffer;

        writevalue (&dst, addr + d->vma);

        for (low = 0; low < CHUNK_SPAN; low++)

    {

      TOHEX (dst, d->chunk_data[addr + low]);

      dst += 2;

    }

        out (abfd, '6', buffer, dst);

      }

  }

    }

  /* Write all the section headers for the sections.  */

  for (s = abfd->sections; s != NULL; s = s->next)

    {

      char *dst = buffer;

      writesym (&dst, s->name);

      *dst++ = '1';

      writevalue (&dst, s->vma);

      writevalue (&dst, s->vma + s->size);

      out (abfd, '3', buffer, dst);

    }

  /* And the symbols.  */

  if (abfd->outsymbols)

    {

      for (p = abfd->outsymbols; *p; p++)

  {

    int section_code = bfd_decode_symclass (*p);

    if (section_code != '?')

      {

        /* Do not include debug symbols.  */

        asymbol *sym = *p;

        char *dst = buffer;

        writesym (&dst, sym->section->name);

        switch (section_code)

    {

    case 'A':

      *dst++ = '2';

      break;

    case 'a':

      *dst++ = '6';

      break;

    case 'D':

    case 'B':

    case 'O':

      *dst++ = '4';

      break;

    case 'd':

    case 'b':

    case 'o':

      *dst++ = '8';

      break;

    case 'T':

      *dst++ = '3';

      break;

    case 't':

      *dst++ = '7';

      break;

    case 'C':

    case 'U':

      bfd_set_error (bfd_error_wrong_format);

      goto fail;

    }

        writesym (&dst, sym->name);

        writevalue (&dst, sym->value + sym->section->vma);

        out (abfd, '3', buffer, dst);

      }

  }

    }

  /* And the terminator.  */

  if (bfd_write ("%0781010\n", 9, abfd) != 9)

    goto fail;

  return true;

 fail:

  return false;

}

static int

tekhex_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,

           struct bfd_link_info *info ATTRIBUTE_UNUSED)

{

  return 0;

}

static asymbol *

tekhex_make_empty_symbol (bfd *abfd)

{

  size_t amt = sizeof (struct tekhex_symbol_struct);

  tekhex_symbol_type *new_symbol = (tekhex_symbol_type *) bfd_zalloc (abfd,

                      amt);

  if (!new_symbol)

    return NULL;

  new_symbol->symbol.the_bfd = abfd;

  new_symbol->prev =  NULL;

  return &(new_symbol->symbol);

}

static void

tekhex_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,

      asymbol *symbol,

      symbol_info *ret)

{

  bfd_symbol_info (symbol, ret);

}

static void

tekhex_print_symbol (bfd *abfd,

         void * filep,

         asymbol *symbol,

         bfd_print_symbol_type how)

{

  FILE *file = (FILE *) filep;

  switch (how)

    {

    case bfd_print_symbol_name:

      fprintf (file, "%s", symbol->name);

      break;

    case bfd_print_symbol_more:

      break;

    case bfd_print_symbol_all:

      {

  const char *section_name = symbol->section->name;

  bfd_print_symbol_vandf (abfd, (void *) file, symbol);

  fprintf (file, " %-5s %s",

     section_name, symbol->name);

      }

    }

}

#define tekhex_close_and_cleanup        _bfd_generic_close_and_cleanup

#define tekhex_bfd_free_cached_info       _bfd_generic_bfd_free_cached_info

#define tekhex_new_section_hook         _bfd_generic_new_section_hook

#define tekhex_bfd_is_target_special_symbol     _bfd_bool_bfd_asymbol_false

#define tekhex_bfd_is_local_label_name         bfd_generic_is_local_label_name

#define tekhex_get_lineno         _bfd_nosymbols_get_lineno

#define tekhex_find_nearest_line        _bfd_nosymbols_find_nearest_line

#define tekhex_find_nearest_line_with_alt     _bfd_nosymbols_find_nearest_line_with_alt

#define tekhex_find_line          _bfd_nosymbols_find_line

#define tekhex_find_inliner_info        _bfd_nosymbols_find_inliner_info

#define tekhex_get_symbol_version_string      _bfd_nosymbols_get_symbol_version_string

#define tekhex_bfd_make_debug_symbol        _bfd_nosymbols_bfd_make_debug_symbol

#define tekhex_read_minisymbols         _bfd_generic_read_minisymbols

#define tekhex_minisymbol_to_symbol       _bfd_generic_minisymbol_to_symbol

#define tekhex_bfd_get_relocated_section_contents   bfd_generic_get_relocated_section_contents

#define tekhex_bfd_relax_section        bfd_generic_relax_section

#define tekhex_bfd_gc_sections          bfd_generic_gc_sections

#define tekhex_bfd_lookup_section_flags       bfd_generic_lookup_section_flags

#define tekhex_bfd_is_group_section       bfd_generic_is_group_section

#define tekhex_bfd_group_name         bfd_generic_group_name

#define tekhex_bfd_discard_group        bfd_generic_discard_group

#define tekhex_section_already_linked       _bfd_generic_section_already_linked

#define tekhex_bfd_define_common_symbol       bfd_generic_define_common_symbol

#define tekhex_bfd_link_hide_symbol       _bfd_generic_link_hide_symbol

#define tekhex_bfd_define_start_stop        bfd_generic_define_start_stop

#define tekhex_bfd_link_hash_table_create     _bfd_generic_link_hash_table_create

#define tekhex_bfd_link_add_symbols       _bfd_generic_link_add_symbols

#define tekhex_bfd_link_just_syms       _bfd_generic_link_just_syms

#define tekhex_bfd_copy_link_hash_symbol_type     _bfd_generic_copy_link_hash_symbol_type

#define tekhex_bfd_final_link         _bfd_generic_final_link

#define tekhex_bfd_link_split_section       _bfd_generic_link_split_section

#define tekhex_bfd_link_check_relocs        _bfd_generic_link_check_relocs

const bfd_target tekhex_vec =

{

  "tekhex",     /* Name.  */

  bfd_target_tekhex_flavour,

  BFD_ENDIAN_UNKNOWN,   /* Target byte order.  */

  BFD_ENDIAN_UNKNOWN,   /* Target headers byte order.  */

  EXEC_P | HAS_SYMS,    /* Object flags.  */

  (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS

   | SEC_ALLOC | SEC_LOAD), /* Section flags.  */

  0,        /* Leading underscore.  */

  ' ',        /* AR_pad_char.  */

  16,       /* AR_max_namelen.  */

  0,        /* match priority.  */

  TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */

  TARGET_MERGE_SECTIONS,

  bfd_getb64, bfd_getb_signed_64, bfd_putb64,

  bfd_getb32, bfd_getb_signed_32, bfd_putb32,

  bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Data.  */

  bfd_getb64, bfd_getb_signed_64, bfd_putb64,

  bfd_getb32, bfd_getb_signed_32, bfd_putb32,

  bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Headers.  */

  {

    _bfd_dummy_target,

    tekhex_object_p,    /* bfd_check_format.  */

    _bfd_dummy_target,

    _bfd_dummy_target,

  },

  {

    _bfd_bool_bfd_false_error,

    tekhex_mkobject,

    _bfd_bool_bfd_false_error,

    _bfd_bool_bfd_false_error,

  },

  {       /* bfd_write_contents.  */

    _bfd_bool_bfd_false_error,

    tekhex_write_object_contents,

    _bfd_bool_bfd_false_error,

    _bfd_bool_bfd_false_error,

  },

  BFD_JUMP_TABLE_GENERIC (tekhex),

  BFD_JUMP_TABLE_COPY (_bfd_generic),

  BFD_JUMP_TABLE_CORE (_bfd_nocore),

  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),

  BFD_JUMP_TABLE_SYMBOLS (tekhex),

  BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),

  BFD_JUMP_TABLE_WRITE (tekhex),

  BFD_JUMP_TABLE_LINK (tekhex),

  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  NULL

};