# This shell script emits C code -*- C -*-
# to keep track of the machine type of Z80 object files
# It does some substitutions.
#   Copyright (C) 2005-2020 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.

LDEMUL_BEFORE_PARSE=gldz80_before_parse
LDEMUL_RECOGNIZED_FILE=gldz80_recognized_file
LDEMUL_AFTER_OPEN=gldz80_after_open

fragment <<EOF
/* --- \begin{z80.em} */
/* Codes for machine types, bitwise or gives the code to use for the
   output.  */
#define M_Z80STRICT 0x01
#define M_Z80       0x03
#define M_Z80FULL   0x07
#define M_R800      0x10
#define M_Z80ANY    0x0f
#define M_GBZ80     0x20
#define M_Z180      0x40
#define M_EZ80_Z80  0x80
#define M_EZ80_ADL  0x100
#define M_ARCH_MASK 0xFF0

/* Bitwise or of the machine types seen so far.  */
static int result_mach_type;

static void
${LDEMUL_BEFORE_PARSE} (void)
{
#ifndef TARGET_			/* I.e., if not generic.  */
  ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
#endif /* not TARGET_ */
  result_mach_type = 0;
}


/* Update result_mach_type.  */
static bfd_boolean
${LDEMUL_RECOGNIZED_FILE} (lang_input_statement_type *entry)
{
  unsigned long mach_type;

  mach_type = bfd_get_mach (entry->the_bfd);
  switch (mach_type)
    {
    case bfd_mach_z80strict:
      result_mach_type |= M_Z80STRICT;
      break;
    case bfd_mach_z80:
      result_mach_type |= M_Z80;
      break;
    case bfd_mach_z80full:
      result_mach_type |= M_Z80FULL;
      break;
    case bfd_mach_r800:
      result_mach_type |= M_R800;
      break;
    case bfd_mach_gbz80:
      result_mach_type |= M_GBZ80;
      break;
    case bfd_mach_z180:
      result_mach_type |= M_Z180;
      break;
    case bfd_mach_ez80_z80:
      result_mach_type |= M_EZ80_Z80;
      break;
    case bfd_mach_ez80_adl:
      result_mach_type |= M_EZ80_ADL;
      break;
    default:
      einfo (_("%P: warning: unknown machine type %u"), (unsigned)mach_type);
      result_mach_type |= M_Z80ANY;
    }
  return FALSE;
}

/* Set the machine type of the output file based on result_mach_type.  */
static void
gldz80_after_open (void)
{
  unsigned long mach_type;

  after_open_default ();

  switch (result_mach_type & M_ARCH_MASK)
    {
    case M_Z80 & M_ARCH_MASK:
    case M_R800:
    case M_Z180:
    case M_GBZ80:
    case M_EZ80_Z80:
    case M_EZ80_ADL:
    case M_EZ80_Z80 | M_Z180:
      /* valid combination */
      break;
    case M_EZ80_Z80 | M_EZ80_ADL:
    case M_EZ80_Z80 | M_EZ80_ADL | M_Z180:
    case M_EZ80_ADL | M_Z180:
      /* combination may cause invalid objdump output */
      /* but it is possible for mixed ADL/Z80 code */
      einfo (_("%P: warning: mixing ADL and Z80 mode binaries, objdump may generate invalid output"));
      break;
    default:
      /* invalid combination: for example Z180 + R800 */
      einfo (_("%P: warning: incompatible object files linked, result code might not work"));
    }

  if ((result_mach_type & M_EZ80_ADL) == M_EZ80_ADL)
    mach_type = bfd_mach_ez80_adl;
  else if ((result_mach_type & M_EZ80_Z80) == M_EZ80_Z80)
    mach_type = bfd_mach_ez80_z80;
  else if ((result_mach_type & M_Z180) == M_Z180)
    mach_type = bfd_mach_z180;
  else if ((result_mach_type & M_R800) == M_R800)
    mach_type = bfd_mach_r800;
  else if ((result_mach_type & M_GBZ80) == M_GBZ80)
    mach_type = bfd_mach_gbz80;
  else if ((result_mach_type & M_Z80FULL) == M_Z80FULL)
    mach_type = bfd_mach_z80full; /* TODO: remove it */
  else if ((result_mach_type & M_Z80) == M_Z80)
    mach_type = bfd_mach_z80;
  else if ((result_mach_type & M_Z80STRICT) == M_Z80STRICT)
    mach_type = bfd_mach_z80strict; /* TODO: remove this */
  else
    mach_type = bfd_arch_unknown;

  bfd_set_arch_mach (link_info.output_bfd, bfd_arch_z80, mach_type);
}
/* --- \end{z80.em} */
EOF