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289 lines
8.0 KiB
Plaintext
289 lines
8.0 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# It does some substitutions.
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cat >e${EMULATION_NAME}.c <<EOF
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/* An emulation for HP PA-RISC ELF linkers.
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Copyright (C) 1991, 93, 94, 95, 97, 1999 Free Software Foundation, Inc.
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Written by Steve Chamberlain steve@cygnus.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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#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 "ldemul.h"
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#include "ldfile.h"
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#include "ldexp.h"
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#include "ldlang.h"
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#include "ldmisc.h"
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#include "ldmain.h"
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#include "ldctor.h"
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/* Section in which we build stubs. */
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static asection *stub_sec;
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static lang_input_statement_type *stub_file;
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/* FIXME. This doesn't belong here. */
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extern lang_statement_list_type file_chain;
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/* Perform some emulation specific initialization. For PA ELF we set
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up the local label prefix and the output architecture. */
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static void
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hppaelf_before_parse ()
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{
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ldfile_output_architecture = bfd_arch_hppa;
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}
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/* Set the output architecture and machine. */
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static void
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hppaelf_set_output_arch()
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{
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unsigned long machine = 0;
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bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
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}
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/* This is called before the input files are opened. We create a new
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fake input file to hold the stub section. */
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static void
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hppaelf_create_output_section_statements ()
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{
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stub_file = lang_add_input_file ("linker stubs",
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lang_input_file_is_fake_enum,
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NULL);
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stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
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if (stub_file->the_bfd == NULL
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|| ! bfd_set_arch_mach (stub_file->the_bfd,
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bfd_get_arch (output_bfd),
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bfd_get_mach (output_bfd)))
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{
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einfo ("%X%P: can not create BFD %E\n");
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return;
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}
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stub_sec = bfd_make_section_old_way (stub_file->the_bfd, ".text");
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/* Don't set SEC_RELOC until we actually have relocations in this
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section. */
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if (stub_sec == NULL
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|| ! bfd_set_section_flags (stub_file->the_bfd, stub_sec,
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(SEC_HAS_CONTENTS
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| SEC_ALLOC
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| SEC_LOAD
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| SEC_CODE
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| SEC_IN_MEMORY)))
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{
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einfo ("%X%P: can not create stub section: %E\n");
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return;
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}
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ldlang_add_file (stub_file);
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}
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/* Walk all the lang statements splicing out any padding statements from
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the list. */
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static void
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hppaelf_delete_padding_statements (s, prev)
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lang_statement_union_type *s;
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lang_statement_union_type **prev;
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{
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lang_statement_union_type *sprev = NULL;
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for (; s != NULL; s = s->next)
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{
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switch (s->header.type)
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{
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/* We want recursively walk these sections. */
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case lang_constructors_statement_enum:
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hppaelf_delete_padding_statements (constructor_list.head,
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&constructor_list.head);
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break;
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case lang_output_section_statement_enum:
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hppaelf_delete_padding_statements (s->output_section_statement.
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children.head,
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&s->output_section_statement.
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children.head);
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break;
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/* Huh? What is a lang_wild_statement? */
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case lang_wild_statement_enum:
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hppaelf_delete_padding_statements (s->wild_statement.
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children.head,
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&s->wild_statement.
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children.head);
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break;
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/* Here's what we are really looking for. Splice these out of
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the list. */
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case lang_padding_statement_enum:
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if (sprev)
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sprev->header.next = s->header.next;
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else
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**prev = *s;
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break;
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/* We don't care about these cases. */
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case lang_data_statement_enum:
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case lang_object_symbols_statement_enum:
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case lang_output_statement_enum:
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case lang_target_statement_enum:
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case lang_input_section_enum:
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case lang_input_statement_enum:
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case lang_assignment_statement_enum:
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case lang_address_statement_enum:
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break;
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default:
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abort ();
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break;
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}
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sprev = s;
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}
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}
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/* Final emulation specific call. For the PA we use this opportunity
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to build linker stubs. */
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static void
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hppaelf_finish ()
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{
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/* Call into the BFD backend to do the real work. */
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if (elf32_hppa_size_stubs (stub_file->the_bfd, output_bfd, &link_info)
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== false)
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{
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einfo ("%X%P: can not size stub section: %E\n");
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return;
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}
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/* If the size of the stub section is nonzero, then we need
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to resize the sections, recompute the assignments, and finally
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build the stubs. */
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if (bfd_section_size (stub_file->the_bfd, stub_file->the_bfd->sections) != 0)
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{
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/* Delete all the padding statements, they're no longer valid. */
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hppaelf_delete_padding_statements (stat_ptr->head, &stat_ptr->head);
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/* Resize the sections. */
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lang_size_sections (stat_ptr->head, abs_output_section,
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&stat_ptr->head, 0, (bfd_vma) 0, false);
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/* Redo special stuff. */
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ldemul_after_allocation ();
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/* Do the assignments again. */
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lang_do_assignments (stat_ptr->head,
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abs_output_section,
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(fill_type) 0, (bfd_vma) 0);
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/* Now build the linker stubs. */
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if (elf32_hppa_build_stubs (stub_file->the_bfd, &link_info) == false)
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{
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einfo ("%X%P: can not build stubs: %E\n");
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return;
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}
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}
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}
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/* The script itself gets inserted here. */
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static char *
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hppaelf_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_hppaelf_emulation =
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{
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hppaelf_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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hppaelf_set_output_arch,
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ldemul_default_target,
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before_allocation_default,
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hppaelf_get_script,
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"hppaelf",
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"elf32-hppa",
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hppaelf_finish,
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hppaelf_create_output_section_statements,
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NULL, /* 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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};
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EOF
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