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|
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
cat >e${EMULATION_NAME}.c <<EOF
/* An emulation for HP PA-RISC ELF linkers.
Copyright (C) 1991, 93, 94, 95, 97, 1999 Free Software Foundation, Inc.
Written by Steve Chamberlain steve@cygnus.com
This file is part of GLD, the Gnu Linker.
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldemul.h"
#include "ldfile.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldmisc.h"
#include "ldmain.h"
#include "ldctor.h"
/* Section in which we build stubs. */
static asection *stub_sec;
static lang_input_statement_type *stub_file;
/* FIXME. This doesn't belong here. */
extern lang_statement_list_type file_chain;
/* Perform some emulation specific initialization. For PA ELF we set
up the local label prefix and the output architecture. */
static void
hppaelf_before_parse ()
{
ldfile_output_architecture = bfd_arch_hppa;
}
/* Set the output architecture and machine. */
static void
hppaelf_set_output_arch()
{
unsigned long machine = 0;
bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
}
/* This is called before the input files are opened. We create a new
fake input file to hold the stub section. */
static void
hppaelf_create_output_section_statements ()
{
stub_file = lang_add_input_file ("linker stubs",
lang_input_file_is_fake_enum,
NULL);
stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
if (stub_file->the_bfd == NULL
|| ! bfd_set_arch_mach (stub_file->the_bfd,
bfd_get_arch (output_bfd),
bfd_get_mach (output_bfd)))
{
einfo ("%X%P: can not create BFD %E\n");
return;
}
stub_sec = bfd_make_section_old_way (stub_file->the_bfd, ".text");
/* Don't set SEC_RELOC until we actually have relocations in this
section. */
if (stub_sec == NULL
|| ! bfd_set_section_flags (stub_file->the_bfd, stub_sec,
(SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_IN_MEMORY)))
{
einfo ("%X%P: can not create stub section: %E\n");
return;
}
ldlang_add_file (stub_file);
}
/* Walk all the lang statements splicing out any padding statements from
the list. */
static void
hppaelf_delete_padding_statements (s, prev)
lang_statement_union_type *s;
lang_statement_union_type **prev;
{
lang_statement_union_type *sprev = NULL;
for (; s != NULL; s = s->next)
{
switch (s->header.type)
{
/* We want recursively walk these sections. */
case lang_constructors_statement_enum:
hppaelf_delete_padding_statements (constructor_list.head,
&constructor_list.head);
break;
case lang_output_section_statement_enum:
hppaelf_delete_padding_statements (s->output_section_statement.
children.head,
&s->output_section_statement.
children.head);
break;
/* Huh? What is a lang_wild_statement? */
case lang_wild_statement_enum:
hppaelf_delete_padding_statements (s->wild_statement.
children.head,
&s->wild_statement.
children.head);
break;
/* Here's what we are really looking for. Splice these out of
the list. */
case lang_padding_statement_enum:
if (sprev)
sprev->header.next = s->header.next;
else
**prev = *s;
break;
/* We don't care about these cases. */
case lang_data_statement_enum:
case lang_object_symbols_statement_enum:
case lang_output_statement_enum:
case lang_target_statement_enum:
case lang_input_section_enum:
case lang_input_statement_enum:
case lang_assignment_statement_enum:
case lang_address_statement_enum:
break;
default:
abort ();
break;
}
sprev = s;
}
}
/* Final emulation specific call. For the PA we use this opportunity
to build linker stubs. */
static void
hppaelf_finish ()
{
/* Call into the BFD backend to do the real work. */
if (elf32_hppa_size_stubs (stub_file->the_bfd, output_bfd, &link_info)
== false)
{
einfo ("%X%P: can not size stub section: %E\n");
return;
}
/* If the size of the stub section is nonzero, then we need
to resize the sections, recompute the assignments, and finally
build the stubs. */
if (bfd_section_size (stub_file->the_bfd, stub_file->the_bfd->sections) != 0)
{
/* Delete all the padding statements, they're no longer valid. */
hppaelf_delete_padding_statements (stat_ptr->head, &stat_ptr->head);
/* Resize the sections. */
lang_size_sections (stat_ptr->head, abs_output_section,
&stat_ptr->head, 0, (bfd_vma) 0, false);
/* Redo special stuff. */
ldemul_after_allocation ();
/* Do the assignments again. */
lang_do_assignments (stat_ptr->head,
abs_output_section,
(fill_type) 0, (bfd_vma) 0);
/* Now build the linker stubs. */
if (elf32_hppa_build_stubs (stub_file->the_bfd, &link_info) == false)
{
einfo ("%X%P: can not build stubs: %E\n");
return;
}
}
}
/* The script itself gets inserted here. */
static char *
hppaelf_get_script(isfile)
int *isfile;
EOF
if test -n "$COMPILE_IN"
then
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc="-f stringify.sed"
cat >>e${EMULATION_NAME}.c <<EOF
{
*isfile = 0;
if (link_info.relocateable == true && config.build_constructors == true)
return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xr >> 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
else
# Scripts read from the filesystem.
cat >>e${EMULATION_NAME}.c <<EOF
{
*isfile = 1;
if (link_info.relocateable == true && config.build_constructors == true)
return "ldscripts/${EMULATION_NAME}.xu";
else if (link_info.relocateable == true)
return "ldscripts/${EMULATION_NAME}.xr";
else if (!config.text_read_only)
return "ldscripts/${EMULATION_NAME}.xbn";
else if (!config.magic_demand_paged)
return "ldscripts/${EMULATION_NAME}.xn";
else
return "ldscripts/${EMULATION_NAME}.x";
}
EOF
fi
cat >>e${EMULATION_NAME}.c <<EOF
struct ld_emulation_xfer_struct ld_hppaelf_emulation =
{
hppaelf_before_parse,
syslib_default,
hll_default,
after_parse_default,
after_open_default,
after_allocation_default,
hppaelf_set_output_arch,
ldemul_default_target,
before_allocation_default,
hppaelf_get_script,
"hppaelf",
"elf32-hppa",
hppaelf_finish,
hppaelf_create_output_section_statements,
NULL, /* open dynamic archive */
NULL, /* place orphan */
NULL, /* set symbols */
NULL, /* parse args */
NULL, /* unrecognized file */
NULL, /* list options */
NULL /* recognized file */
};
EOF
|
