# 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"
+# Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003, 2004,
+# 2005, 2006, 2007, 2008, 2009 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.
+#
+
+# This file is sourced from elf32.em, and defines extra hppa-elf
+# specific routines.
+#
+fragment <<EOF
+
#include "ldctor.h"
+#include "elf32-hppa.h"
+
+
+/* Fake input file for stubs. */
+static lang_input_statement_type *stub_file;
+
+/* Type of import/export stubs to build. For a single sub-space model,
+ we can build smaller import stubs and there is no need for export
+ stubs. */
+static int multi_subspace = 0;
+
+/* Whether we need to call hppa_layout_sections_again. */
+static int need_laying_out = 0;
+
+/* Maximum size of a group of input sections that can be handled by
+ one stub section. A value of +/-1 indicates the bfd back-end
+ should use a suitable default size. */
+static bfd_signed_vma group_size = 1;
+
+/* Stops the linker merging .text sections on a relocatable link,
+ and adds millicode library to the list of input files. */
-static void hppaelf_before_parse()
+static void
+hppaelf_after_parse (void)
{
- link_info.lprefix = "L$";
- link_info.lprefix_len = 2;
+ if (link_info.relocatable)
+ lang_add_unique (".text");
- ldfile_output_architecture = bfd_arch_hppa;
-}
+ /* Enable this once we split millicode stuff from libgcc:
+ lang_add_input_file ("milli",
+ lang_input_file_is_l_enum,
+ NULL);
+ */
-static lang_input_statement_type *stub_file = 0;
+ after_parse_default ();
+}
-static lang_input_section_type *stub_input_section = NULL;
+/* This is called before the input files are opened. We create a new
+ fake input file to hold the stub sections. */
static void
-hppaelf_search_for_padding_statements(s,prev)
- lang_statement_union_type *s;
- lang_statement_union_type **prev;
+hppaelf_create_output_section_statements (void)
+{
+ if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
+ && (elf_object_id (link_info.output_bfd) == HPPA32_ELF_DATA
+ || elf_object_id (link_info.output_bfd) == HPPA64_ELF_DATA)))
+ return;
+
+ stub_file = lang_add_input_file ("linker stubs",
+ lang_input_file_is_fake_enum,
+ NULL);
+ stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
+ if (stub_file->the_bfd == NULL
+ || ! bfd_set_arch_mach (stub_file->the_bfd,
+ bfd_get_arch (link_info.output_bfd),
+ bfd_get_mach (link_info.output_bfd)))
+ {
+ einfo ("%X%P: can not create BFD %E\n");
+ return;
+ }
+
+ stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
+ ldlang_add_file (stub_file);
+}
+
+
+struct hook_stub_info
{
- lang_statement_union_type *sprev = NULL;
- for (; s != (lang_statement_union_type *) NULL; s = s->next)
+ lang_statement_list_type add;
+ asection *input_section;
+};
+
+/* Traverse the linker tree to find the spot where the stub goes. */
+
+static bfd_boolean
+hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
+{
+ lang_statement_union_type *l;
+ bfd_boolean ret;
+
+ for (; (l = *lp) != NULL; lp = &l->header.next)
{
- switch (s->header.type)
+ switch (l->header.type)
{
case lang_constructors_statement_enum:
- hppaelf_search_for_padding_statements (constructor_list.head,&constructor_list.head);
+ ret = hook_in_stub (info, &constructor_list.head);
+ if (ret)
+ return ret;
break;
+
case lang_output_section_statement_enum:
- hppaelf_search_for_padding_statements
- (s->output_section_statement.children.head,&s->output_section_statement.children.head);
+ ret = hook_in_stub (info,
+ &l->output_section_statement.children.head);
+ if (ret)
+ return ret;
break;
+
case lang_wild_statement_enum:
- hppaelf_search_for_padding_statements
- (s->wild_statement.children.head,&s->wild_statement.children.head);
+ ret = hook_in_stub (info, &l->wild_statement.children.head);
+ if (ret)
+ return ret;
+ break;
+
+ case lang_group_statement_enum:
+ ret = hook_in_stub (info, &l->group_statement.children.head);
+ if (ret)
+ return ret;
break;
+
+ case lang_input_section_enum:
+ if (l->input_section.section == info->input_section)
+ {
+ /* We've found our section. Insert the stub immediately
+ before its associated input section. */
+ *lp = info->add.head;
+ *(info->add.tail) = l;
+ return TRUE;
+ }
+ break;
+
case lang_data_statement_enum:
+ case lang_reloc_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;
case lang_padding_statement_enum:
- if ( sprev )
- {
- sprev->header.next = s->header.next;
- }
- else
- {
- **prev = *s;
- }
+ case lang_address_statement_enum:
+ case lang_fill_statement_enum:
break;
+
default:
FAIL ();
break;
}
- sprev = s;
}
+ return FALSE;
}
-static void
-hppaelf_finish()
+
+/* Call-back for elf32_hppa_size_stubs. */
+
+/* Create a new stub section, and arrange for it to be linked
+ immediately before INPUT_SECTION. */
+
+static asection *
+hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
{
- extern asymbol *hppa_look_for_stubs_in_section();
+ asection *stub_sec;
+ flagword flags;
+ asection *output_section;
+ const char *secname;
+ lang_output_section_statement_type *os;
+ struct hook_stub_info info;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
+ | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
+ stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
+ stub_sec_name, flags);
+ if (stub_sec == NULL)
+ goto err_ret;
+
+ output_section = input_section->output_section;
+ secname = bfd_get_section_name (output_section->owner, output_section);
+ os = lang_output_section_find (secname);
+
+ info.input_section = input_section;
+ lang_list_init (&info.add);
+ lang_add_section (&info.add, stub_sec, os);
+
+ if (info.add.head == NULL)
+ goto err_ret;
+
+ if (hook_in_stub (&info, &os->children.head))
+ return stub_sec;
+
+ err_ret:
+ einfo ("%X%P: can not make stub section: %E\n");
+ return NULL;
+}
- if (link_info.relocateable == false)
- {
- /* check for needed stubs */
- extern lang_statement_list_type file_chain;
- lang_input_statement_type *statement;
- for (statement = (lang_input_statement_type *)file_chain.head;
- statement != (lang_input_statement_type *)NULL;
- statement = (lang_input_statement_type *)statement->next)
- {
- asection *section;
- bfd *abfd = statement->the_bfd;
- for (section = abfd->sections;
- section != (asection *)NULL;
- section = section ->next)
- {
- int new_sym_cnt = 0;
- int i,j;
- asymbol *syms;
-
- syms = hppa_look_for_stubs_in_section (stub_file->the_bfd,
- abfd,
- output_bfd,
- section,
- statement->asymbols,
- &new_sym_cnt,
- &link_info);
-
- if ( (new_sym_cnt > 0) && syms )
- {
- struct symbol_cache_entry **old_asymbols;
-
- old_asymbols = stub_file->asymbols;
-
- stub_file->asymbols = xmalloc((stub_file->symbol_count + new_sym_cnt) * sizeof(asymbol *));
-
- for ( j = 0; j < stub_file->symbol_count; j++ )
- stub_file->asymbols[j] = old_asymbols[j];
-
- for ( j = 0, i = stub_file->symbol_count; j < new_sym_cnt; j++, i++ )
- stub_file->asymbols[i] = &syms[j];
-
- 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);
+/* Another call-back for elf32_hppa_size_stubs. */
- /* If we've added stubs,remove the padding_statements because */
- /* they are no longer valid */
- hppaelf_search_for_padding_statements(stat_ptr->head,&(stat_ptr->head));
- }
+static void
+hppaelf_layout_sections_again (void)
+{
+ /* If we have changed sizes of the stub sections, then we need
+ to recalculate all the section offsets. This may mean we need to
+ add even more stubs. */
+ gld${EMULATION_NAME}_map_segments (TRUE);
+ need_laying_out = -1;
}
+
static void
-hppaelf_create_output_section_statements()
+build_section_lists (lang_statement_union_type *statement)
{
- asection *stub_sec;
- asection *output_text_sec = bfd_make_section_old_way(output_bfd,".text");
- lang_input_section_type *new_input_sec;
-
- stub_file = lang_add_input_file ("linker stubs",
- lang_input_file_is_fake_enum,
- (char *) NULL);
- stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
- stub_file->symbol_count = 0;
- stub_file->the_bfd->sections = 0;
-
- 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 )
+ if (statement->header.type == lang_input_section_enum)
{
- lang_output_section_statement_type *text_output_sec;
- lang_statement_union_type *stmt;
- lang_wild_statement_type *stub_statement;
- 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;
- }
-
- 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);
- }
+ asection *i = statement->input_section.section;
+
+ if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+ && (i->flags & SEC_EXCLUDE) == 0
+ && i->output_section != NULL
+ && i->output_section->owner == link_info.output_bfd)
+ {
+ elf32_hppa_next_input_section (&link_info, i);
+ }
}
}
+
+/* For the PA we use this opportunity to size and build linker stubs. */
+
static void
-hppaelf_set_output_arch()
+gld${EMULATION_NAME}_after_allocation (void)
{
- /* Set the output architecture and machine if possible */
- unsigned long machine = 0;
- bfd_set_arch_mach(output_bfd, ldfile_output_architecture, machine);
+ /* bfd_elf_discard_info just plays with data and debugging sections,
+ ie. doesn't affect code size, so we can delay resizing the
+ sections. It's likely we'll resize everything in the process of
+ adding stubs. */
+ if (bfd_elf_discard_info (link_info.output_bfd, &link_info))
+ need_laying_out = 1;
+
+ /* If generating a relocatable output file, then we don't
+ have to examine the relocs. */
+ if (stub_file != NULL && !link_info.relocatable)
+ {
+ int ret = elf32_hppa_setup_section_lists (link_info.output_bfd,
+ &link_info);
+
+ if (ret != 0)
+ {
+ if (ret < 0)
+ {
+ einfo ("%X%P: can not size stub section: %E\n");
+ return;
+ }
+
+ lang_for_each_statement (build_section_lists);
+
+ /* Call into the BFD backend to do the real work. */
+ if (! elf32_hppa_size_stubs (link_info.output_bfd,
+ stub_file->the_bfd,
+ &link_info,
+ multi_subspace,
+ group_size,
+ &hppaelf_add_stub_section,
+ &hppaelf_layout_sections_again))
+ {
+ einfo ("%X%P: can not size stub section: %E\n");
+ return;
+ }
+ }
+ }
+
+ if (need_laying_out != -1)
+ gld${EMULATION_NAME}_map_segments (need_laying_out);
+
+ if (! link_info.relocatable)
+ {
+ /* Set the global data pointer. */
+ if (! elf32_hppa_set_gp (link_info.output_bfd, &link_info))
+ {
+ einfo ("%X%P: can not set gp\n");
+ return;
+ }
+
+ /* Now build the linker stubs. */
+ if (stub_file != NULL && stub_file->the_bfd->sections != NULL)
+ {
+ if (! elf32_hppa_build_stubs (&link_info))
+ einfo ("%X%P: can not build stubs: %E\n");
+ }
+ }
}
-static char *
-hppaelf_get_script(isfile)
- int *isfile;
-EOF
-if test -n "$COMPILE_IN"
-then
-# Scripts compiled in.
+/* Avoid processing the fake stub_file in vercheck, stat_needed and
+ check_needed routines. */
-# sed commands to quote an ld script as a C string.
-sc='s/["\\]/\\&/g
-s/$/\\n\\/
-1s/^/"/
-$s/$/n"/
-'
+static void (*real_func) (lang_input_statement_type *);
-cat >>em_${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`;
+static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l)
+{
+ if (l != stub_file)
+ (*real_func) (l);
}
-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";
+static void
+hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
+{
+ real_func = func;
+ lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
}
+
+#define lang_for_each_input_file hppa_lang_for_each_input_file
+
EOF
-fi
+# Define some shell vars to insert bits of code into the standard elf
+# parse_args and list_options functions.
+#
+PARSE_AND_LIST_PROLOGUE='
+#define OPTION_MULTI_SUBSPACE 301
+#define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
+'
-cat >>em_${EMULATION_NAME}.c <<EOF
+PARSE_AND_LIST_LONGOPTS='
+ { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
+ { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
+'
-struct ld_emulation_xfer_struct ld_hppaelf_emulation =
-{
- hppaelf_before_parse,
- syslib_default,
- hll_default,
- after_parse_default,
- after_allocation_default,
- hppaelf_set_output_arch,
- ldemul_default_target,
- before_allocation_default,
- hppaelf_get_script,
- "hppaelf",
- "elf32-hppa",
- hppaelf_finish,
- hppaelf_create_output_section_statements
-};
-EOF
+PARSE_AND_LIST_OPTIONS='
+ fprintf (file, _("\
+ --multi-subspace Generate import and export stubs to support\n\
+ multiple sub-space shared libraries\n"
+ ));
+ fprintf (file, _("\
+ --stub-group-size=N Maximum size of a group of input sections that\n\
+ can be handled by one stub section. A negative\n\
+ value locates all stubs before their branches\n\
+ (with a group size of -N), while a positive\n\
+ value allows two groups of input sections, one\n\
+ before, and one after each stub section.\n\
+ Values of +/-1 indicate the linker should\n\
+ choose suitable defaults.\n"
+ ));
+'
+
+PARSE_AND_LIST_ARGS_CASES='
+ case OPTION_MULTI_SUBSPACE:
+ multi_subspace = 1;
+ break;
+
+ case OPTION_STUBGROUP_SIZE:
+ {
+ const char *end;
+ group_size = bfd_scan_vma (optarg, &end, 0);
+ if (*end)
+ einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
+ }
+ break;
+'
+
+# Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
+#
+LDEMUL_AFTER_PARSE=hppaelf_after_parse
+LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
+LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements
projects / deliverable / binutils-gdb.git / blobdiff