old-cross-binutils/ld/emultempl/hppaelf.em
Jeff Law 2e39abdb96 * emultempl/hppaelf.em: Include elf32-hppa.h.
(file_chain): Add decl.
        (hppa_look_for_stubs_in_section): Delete decl.
        (hppaelf_finish): Reenable code.  Do not pass symbols
        down to hppa_look_for_stubs_in_section.
1994-02-28 00:30:36 +00:00

366 lines
10 KiB
Text

# This shell script emits a C file. -*- C -*-
# It does some substitutions.
cat >em_${EMULATION_NAME}.c <<EOF
/* An emulation for HP PA-RISC ELF linkers.
Copyright (C) 1991, 1993 Free Software Foundation, Inc.
Written by Steve Chamberlain steve@cygnus.com
This file is part of GLD, the Gnu Linker.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "ld.h"
#include "config.h"
#include "ldemul.h"
#include "ldfile.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldmisc.h"
#include "ldmain.h"
#include "ldctor.h"
static lang_input_statement_type *stub_file = 0;
static lang_input_section_type *stub_input_section = NULL;
/* FIXME. This doesn't belong here. */
extern lang_statement_list_type file_chain;
/* Perform some emulation specific initialization. For PA ELF we set
up the local label prefix and the output architecture. */
static void
hppaelf_before_parse ()
{
link_info.lprefix = "L$";
link_info.lprefix_len = 2;
ldfile_output_architecture = bfd_arch_hppa;
}
/* Walk all the lang statements splicing out any padding statements from
the list. */
static void
hppaelf_search_for_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_search_for_padding_statements (constructor_list.head,
&constructor_list.head);
break;
case lang_output_section_statement_enum:
hppaelf_search_for_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_search_for_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 determine what linker stubs are needed and generate them.
FIXME: fast-linker work broke this in a big way. statement->asymbols
doesn't have anything useful in it anymore. And if we slurp in
the symbol table here and pass it down then we get lots of undefined
symbols. Egad. */
static void
hppaelf_finish ()
{
/* Disabled until it's fixed to work with the new linker. A noteworty
amount of code will still function without linker stubs allowing us
to continue testing. */
/* Only create stubs for final objects. */
if (link_info.relocateable == false)
{
lang_input_statement_type *statement;
/* Look at all the statements. */
for (statement = (lang_input_statement_type *)file_chain.head;
statement != NULL;
statement = (lang_input_statement_type *)statement->next)
{
asection *section;
bfd *abfd = statement->the_bfd;
/* Look at all the sections attached to the bfd associated with
the current statement. */
for (section = abfd->sections;
section != (asection *)NULL;
section = section ->next)
{
int new_sym_cnt = 0;
int i,j;
asymbol *syms;
/* Do the dirty work; an array of symbols for each new stub
will be returned. */
syms = hppa_look_for_stubs_in_section (stub_file->the_bfd,
abfd,
output_bfd,
section,
&new_sym_cnt,
&link_info);
if (new_sym_cnt > 0 && syms)
{
struct symbol_cache_entry **old_asymbols;
old_asymbols = stub_file->asymbols;
/* Allocate space for the updated symbols */
stub_file->asymbols
= xmalloc ((stub_file->symbol_count + new_sym_cnt)
* sizeof(asymbol *));
if (stub_file->asymbols == NULL)
abort ();
/* Copy the old symbols.
FIXME. Shouldn't we free the space used by the old
symbols here? Might there be dangling references
made within hppa_look_for_stubs_in_section? */
for (j = 0; j < stub_file->symbol_count; j++)
stub_file->asymbols[j] = old_asymbols[j];
/* Copy in the new symbols. */
for (j = 0, i = stub_file->symbol_count;
j < new_sym_cnt;
j++, i++)
stub_file->asymbols[i] = &syms[j];
/* Finally, adjust the symbol count. */
stub_file->symbol_count += new_sym_cnt;
}
}
}
/* Add a statement to get the linker stubs included in the output. */
lang_add_wild (".hppa_linker_stubs",NULL);
/* If stubs were added, then remove all the (now invalid) padding
statements. */
hppaelf_search_for_padding_statements (stat_ptr->head,
&stat_ptr->head);
}
/* Size up the sections again. */
lang_size_sections (stat_ptr->head, abs_output_section,
&stat_ptr->head, 0, (bfd_vma) 0, false);
/* FIXME: Do we need to redo the "assignments" too? */
}
/* Create any emulation specific output statements. FIXME? Is this
redundant with above lang_add_wild or the code in the script? */
static void
hppaelf_create_output_section_statements ()
{
asection *stub_sec;
asection *output_text_sec = bfd_make_section_old_way (output_bfd, ".text");
lang_input_section_type *new_input_sec;
/* Add a new "input file" (the linker stubs themselves). */
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);
stub_file->symbol_count = 0;
stub_file->the_bfd->sections = 0;
/* Add a section to the fake input file. */
stub_sec = bfd_make_section_old_way (stub_file->the_bfd,
".hppa_linker_stubs");
stub_sec->output_section = output_text_sec;
bfd_set_section_flags (stub_file->the_bfd, stub_sec,
SEC_HAS_CONTENTS | SEC_ALLOC | SEC_CODE | SEC_RELOC);
/* The user data of a bfd points to the input statement attached. */
stub_file->the_bfd->usrdata = (void *)stub_file;
stub_file->common_section = bfd_make_section(stub_file->the_bfd,"COMMON");
new_input_sec = (lang_input_section_type *)
stat_alloc (sizeof (lang_input_section_type));
if (new_input_sec)
{
lang_output_section_statement_type *text_output_sec;
lang_statement_union_type *stmt;
new_input_sec->section = stub_sec;
new_input_sec->ifile = stub_file;
new_input_sec->header.type = lang_input_section_enum;
new_input_sec->header.next = NULL;
stub_input_section = new_input_sec;
/* Find the output_section_statement for .text,
then find the wild_statement for .hppa_linker_stubs. */
text_output_sec = lang_output_section_find (".text");
stmt = text_output_sec->children.head;
while (stmt && stmt->header.type != lang_wild_statement_enum)
stmt = stmt->header.next;
/* Do something with the wild statement. FIXME. */
if (stmt)
{
lang_wild_statement_type *wstmt = (lang_wild_statement_type *)stmt;
lang_list_init (&wstmt->children);
lang_statement_append (&wstmt->children,
(lang_statement_union_type *)new_input_sec,
&new_input_sec->header.next);
}
}
}
/* 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);
}
/* The script itself gets inserted here. */
static char *
hppaelf_get_script(isfile)
int *isfile;
EOF
if test -n "$COMPILE_IN"
then
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc='s/["\\]/\\&/g
s/$/\\n\\/
1s/^/"/
$s/$/n"/
'
cat >>em_${EMULATION_NAME}.c <<EOF
{
*isfile = 0;
if (link_info.relocateable == true && config.build_constructors == true)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`;
else if (link_info.relocateable == true)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`;
else if (!config.text_read_only)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`;
else if (!config.magic_demand_paged)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`;
else
return `sed "$sc" ldscripts/${EMULATION_NAME}.x`;
}
EOF
else
# Scripts read from the filesystem.
cat >>em_${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/${EMULATION_NAME}.x";
}
EOF
fi
cat >>em_${EMULATION_NAME}.c <<EOF
struct ld_emulation_xfer_struct ld_hppaelf_emulation =
{
hppaelf_before_parse,
syslib_default,
hll_default,
after_parse_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
};
EOF