228 lines
6.9 KiB
Plaintext
228 lines
6.9 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# It does some substitutions.
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if [ -z "$MACHINE" ]; then
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OUTPUT_ARCH=${ARCH}
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else
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OUTPUT_ARCH=${ARCH}:${MACHINE}
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fi
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cat >e${EMULATION_NAME}.c <<EOF
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/* This file is is generated by a shell script. DO NOT EDIT! */
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/* Linux a.out emulation code for ${EMULATION_NAME}
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Copyright 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000
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Free Software Foundation, Inc.
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Written by Steve Chamberlain <sac@cygnus.com>
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Linux support by Eric Youngdale <ericy@cais.cais.com>
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This file is part of GLD, the Gnu Linker.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#define TARGET_IS_${EMULATION_NAME}
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "ld.h"
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#include "ldmain.h"
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#include "ldmisc.h"
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#include "ldexp.h"
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#include "ldlang.h"
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#include "ldfile.h"
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#include "ldemul.h"
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static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
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static boolean gld${EMULATION_NAME}_open_dynamic_archive
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PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
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static void gld${EMULATION_NAME}_find_address_statement
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PARAMS ((lang_statement_union_type *));
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static void gld${EMULATION_NAME}_create_output_section_statements
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PARAMS ((void));
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static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
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static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
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static void
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gld${EMULATION_NAME}_before_parse()
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{
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const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}");
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if (arch)
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{
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ldfile_output_architecture = arch->arch;
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ldfile_output_machine = arch->mach;
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ldfile_output_machine_name = arch->printable_name;
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}
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else
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ldfile_output_architecture = bfd_arch_${ARCH};
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config.dynamic_link = true;
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config.has_shared = true;
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}
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/* Try to open a dynamic archive. This is where we know that Linux
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dynamic libraries have an extension of .sa. */
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static boolean
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gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
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const char *arch;
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search_dirs_type *search;
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lang_input_statement_type *entry;
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{
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char *string;
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if (! entry->is_archive)
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return false;
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string = (char *) xmalloc (strlen (search->name)
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+ strlen (entry->filename)
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+ strlen (arch)
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+ sizeof "/lib.sa");
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sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch);
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if (! ldfile_try_open_bfd (string, entry))
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{
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free (string);
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return false;
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}
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entry->filename = string;
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return true;
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}
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/* This is called by the create_output_section_statements routine via
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lang_for_each_statement. It locates any address assignment to
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.text, and modifies it to include the size of the headers. This
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causes -Ttext to mean the starting address of the header, rather
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than the starting address of .text, which is compatible with other
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Linux tools. */
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static void
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gld${EMULATION_NAME}_find_address_statement (s)
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lang_statement_union_type *s;
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{
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if (s->header.type == lang_address_statement_enum
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&& strcmp (s->address_statement.section_name, ".text") == 0)
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{
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ASSERT (s->address_statement.address->type.node_class == etree_value);
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s->address_statement.address->value.value += 0x20;
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}
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}
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/* This is called before opening the input BFD's. */
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static void
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gld${EMULATION_NAME}_create_output_section_statements ()
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{
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lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
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}
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/* This is called after the sections have been attached to output
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sections, but before any sizes or addresses have been set. */
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static void
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gld${EMULATION_NAME}_before_allocation ()
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{
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if (link_info.relocateable)
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return;
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/* Let the backend work out the sizes of any sections required by
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dynamic linking. */
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if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info))
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einfo ("%P%F: failed to set dynamic section sizes: %E\n");
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}
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static char *
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gld${EMULATION_NAME}_get_script(isfile)
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int *isfile;
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EOF
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if test -n "$COMPILE_IN"
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then
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# Scripts compiled in.
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# sed commands to quote an ld script as a C string.
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sc="-f stringify.sed"
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cat >>e${EMULATION_NAME}.c <<EOF
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{
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*isfile = 0;
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if (link_info.relocateable == true && config.build_constructors == true)
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return
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EOF
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sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
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echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
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echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
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echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
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echo ' ; else return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
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echo '; }' >> e${EMULATION_NAME}.c
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else
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# Scripts read from the filesystem.
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cat >>e${EMULATION_NAME}.c <<EOF
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{
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*isfile = 1;
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if (link_info.relocateable == true && config.build_constructors == true)
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return "ldscripts/${EMULATION_NAME}.xu";
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else if (link_info.relocateable == true)
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return "ldscripts/${EMULATION_NAME}.xr";
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else if (!config.text_read_only)
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return "ldscripts/${EMULATION_NAME}.xbn";
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else if (!config.magic_demand_paged)
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return "ldscripts/${EMULATION_NAME}.xn";
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else
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return "ldscripts/${EMULATION_NAME}.x";
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}
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EOF
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fi
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cat >>e${EMULATION_NAME}.c <<EOF
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struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
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{
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gld${EMULATION_NAME}_before_parse,
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syslib_default,
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hll_default,
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after_parse_default,
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after_open_default,
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after_allocation_default,
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set_output_arch_default,
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ldemul_default_target,
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gld${EMULATION_NAME}_before_allocation,
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gld${EMULATION_NAME}_get_script,
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"${EMULATION_NAME}",
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"${OUTPUT_FORMAT}",
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NULL, /* finish */
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gld${EMULATION_NAME}_create_output_section_statements,
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gld${EMULATION_NAME}_open_dynamic_archive,
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NULL, /* place orphan */
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NULL, /* set symbols */
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NULL, /* parse args */
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NULL, /* unrecognized file */
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NULL, /* list options */
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NULL, /* recognized file */
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NULL, /* find_potential_libraries */
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NULL /* new_vers_pattern */
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};
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EOF
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