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Diffstat (limited to 'ld/emultempl/pdp11.em')
| -rw-r--r-- | ld/emultempl/pdp11.em | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/ld/emultempl/pdp11.em b/ld/emultempl/pdp11.em new file mode 100644 index 0000000..d18a420 --- /dev/null +++ b/ld/emultempl/pdp11.em @@ -0,0 +1,132 @@ +# This shell script emits a C file. -*- C -*- +# Copyright (C) 2006-2020 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. + +fragment <<EOF + +/* --- \begin{pdp11.em} */ +#include "getopt.h" + +static void +gld${EMULATION_NAME}_before_parse (void) +{ + ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); + /* for PDP11 Unix compatibility, default to --omagic */ + config.magic_demand_paged = FALSE; + config.text_read_only = FALSE; +} + +/* PDP11 specific options. */ +#define OPTION_IMAGIC 301 + +static void +gld${EMULATION_NAME}_add_options + (int ns ATTRIBUTE_UNUSED, + char **shortopts, + int nl, + struct option **longopts, + int nrl ATTRIBUTE_UNUSED, + struct option **really_longopts ATTRIBUTE_UNUSED) +{ + static const char xtra_short[] = "z"; + static const struct option xtra_long[] = + { + {"imagic", no_argument, NULL, OPTION_IMAGIC}, + {NULL, no_argument, NULL, 0} + }; + + *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short)); + memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short)); + *longopts + = xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long)); + memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); +} + +static void +gld${EMULATION_NAME}_list_options (FILE *file) +{ + fprintf (file, _(" -N, --omagic Do not make text readonly, do not page align data (default)\n")); + fprintf (file, _(" -n, --nmagic Make text readonly, align data to next page\n")); + fprintf (file, _(" -z, --imagic Make text readonly, separate instruction and data spaces\n")); + fprintf (file, _(" --no-omagic Equivalent to --nmagic\n")); +} + +static bfd_boolean +gld${EMULATION_NAME}_handle_option (int optc) +{ + switch (optc) + { + default: + return FALSE; + + case 'z': + case OPTION_IMAGIC: + link_info.separate_code = 1; + /* The --imagic format causes the .text and .data sections to occupy the + same memory addresses in separate spaces, so don't check overlap. */ + command_line.check_section_addresses = 0; + break; + } + + return TRUE; +} + +/* We need a special case to prepare an additional linker script for option + * --imagic where the .data section starts at address 0 rather than directly + * following the .text section or being aligned to the next page after the + * .text section. */ +static char * +gld${EMULATION_NAME}_get_script (int *isfile) +EOF +# Scripts compiled in. +# sed commands to quote an ld script as a C string. +sc="-f stringify.sed" + +fragment <<EOF +{ + *isfile = 0; + + if (bfd_link_relocatable (&link_info) && config.build_constructors) + return +EOF +sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c +echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c +echo ' ; else if (link_info.separate_code) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xn | \ + sed -e "s/ALIGN($TARGET_PAGE_SIZE)/0/" >> e${EMULATION_NAME}.c +echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c +echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c +echo ' ; else return' >> e${EMULATION_NAME}.c +sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c +echo '; }' >> e${EMULATION_NAME}.c + +fragment <<EOF + +/* --- \end{pdp11.em} */ + +EOF + +LDEMUL_BEFORE_PARSE=gld"$EMULATION_NAME"_before_parse +LDEMUL_ADD_OPTIONS=gld"$EMULATION_NAME"_add_options +LDEMUL_HANDLE_OPTION=gld"$EMULATION_NAME"_handle_option +LDEMUL_LIST_OPTIONS=gld"$EMULATION_NAME"_list_options +LDEMUL_GET_SCRIPT=gld"$EMULATION_NAME"_get_script |