# This shell script emits a C file. -*- C -*-
-# It does some substitutions.
-ELFSIZE=32
-cat >e${EMULATION_NAME}.c <<EOF
-/* This file is is generated by a shell script. DO NOT EDIT! */
-
-/* emulate the original gld for the given ${EMULATION_NAME}
- Copyright (C) 1991, 93, 96, 97, 98, 99, 2000
- Free Software Foundation, Inc.
- Written by Steve Chamberlain steve@cygnus.com
-
-This file is part of GLD, the Gnu Linker.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#define TARGET_IS_${EMULATION_NAME}
-
-#include "bfd.h"
-#include "sysdep.h"
-
-#include <ctype.h>
-
-#include "bfdlink.h"
-#include "getopt.h"
-
-#include "ld.h"
-#include "ldmain.h"
-#include "ldmisc.h"
-
-#include "ldexp.h"
-#include "ldlang.h"
-#include "ldfile.h"
-#include "ldemul.h"
-#include "ldgram.h"
-
-static boolean gld${EMULATION_NAME}_open_dynamic_archive
- PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
-static void gld${EMULATION_NAME}_after_open PARAMS ((void));
-static void gld${EMULATION_NAME}_check_needed
- PARAMS ((lang_input_statement_type *));
-static void gld${EMULATION_NAME}_stat_needed
- PARAMS ((lang_input_statement_type *));
-static boolean gld${EMULATION_NAME}_search_needed
- PARAMS ((const char *, const char *, int));
-static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int));
-static void gld${EMULATION_NAME}_vercheck
- PARAMS ((lang_input_statement_type *));
-static void gld${EMULATION_NAME}_find_statement_assignment
- PARAMS ((lang_statement_union_type *));
-static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
-static boolean gld${EMULATION_NAME}_place_orphan
- PARAMS ((lang_input_statement_type *, asection *));
-static lang_output_section_statement_type *output_rel_find PARAMS ((void));
-static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
-static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
-static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
-static int gld${EMULATION_NAME}_parse_args PARAMS((int, char **));
-static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *));
-static void gld${EMULATION_NAME}_finish PARAMS ((void));
-
-\f
-static int no_pipeline_knowledge = 0;
-static char * thumb_entry_symbol = NULL;
-
-#define OPTION_THUMB_ENTRY 301
-
-static struct option longopts[] =
-{
- { "no-pipeline-knowledge", no_argument, NULL, 'p'},
- { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
- { NULL, no_argument, NULL, 0 }
-};
-
-static void
-gld${EMULATION_NAME}_list_options (file)
- FILE * file;
-{
- fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n"));
- fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
-}
-
-static int
-gld${EMULATION_NAME}_parse_args (argc, argv)
- int argc;
- char ** argv;
-{
- int longind;
- int optc;
- int prevoptind = optind;
- int prevopterr = opterr;
- int wanterror;
- static int lastoptind = -1;
-
- if (lastoptind != optind)
- opterr = 0;
-
- wanterror = opterr;
- lastoptind = optind;
-
- optc = getopt_long_only (argc, argv, "-p", longopts, & longind);
- opterr = prevopterr;
-
- switch (optc)
- {
- default:
- if (wanterror)
- xexit (1);
- optind = prevoptind;
- return 0;
+# Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+# 2004, 2005
+# Free Software Foundation, Inc.
+#
+# 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+#
+
+# This file is sourced from elf32.em, and defines extra arm-elf
+# specific routines.
+#
+test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel"
+cat >>e${EMULATION_NAME}.c <<EOF
- case 'p':
- no_pipeline_knowledge = 1;
- break;
+#include "elf/arm.h"
- case OPTION_THUMB_ENTRY:
- thumb_entry_symbol = optarg;
- break;
- }
-
- return 1;
-}
-\f
+static char *thumb_entry_symbol = NULL;
+static bfd *bfd_for_interwork;
+static int byteswap_code = 0;
+static int target1_is_rel = 0${TARGET1_IS_REL};
+static char *target2_type = "${TARGET2_TYPE}";
+static int fix_v4bx = 0;
+static int use_blx = 0;
static void
-gld${EMULATION_NAME}_before_parse ()
+gld${EMULATION_NAME}_before_parse (void)
{
#ifndef TARGET_ /* I.e., if not generic. */
- ldfile_set_output_arch ("`echo ${ARCH}`");
+ ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
#endif /* not TARGET_ */
- config.dynamic_link = ${DYNAMIC_LINK-true};
- config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
-}
-
-/* Try to open a dynamic archive. This is where we know that ELF
- dynamic libraries have an extension of .so. */
-
-static boolean
-gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
- const char *arch;
- search_dirs_type *search;
- lang_input_statement_type *entry;
-{
- const char *filename;
- char *string;
-
- if (! entry->is_archive)
- return false;
-
- filename = entry->filename;
-
- string = (char *) xmalloc (strlen (search->name)
- + strlen (filename)
- + strlen (arch)
- + sizeof "/lib.so");
-
- sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
-
- if (! ldfile_try_open_bfd (string, entry))
- {
- free (string);
- return false;
- }
-
- entry->filename = string;
-
- /* We have found a dynamic object to include in the link. The ELF
- backend linker will create a DT_NEEDED entry in the .dynamic
- section naming this file. If this file includes a DT_SONAME
- entry, it will be used. Otherwise, the ELF linker will just use
- the name of the file. For an archive found by searching, like
- this one, the DT_NEEDED entry should consist of just the name of
- the file, without the path information used to find it. Note
- that we only need to do this if we have a dynamic object; an
- archive will never be referenced by a DT_NEEDED entry.
-
- FIXME: This approach--using bfd_elf_set_dt_needed_name--is not
- very pretty. I haven't been able to think of anything that is
- pretty, though. */
- if (bfd_check_format (entry->the_bfd, bfd_object)
- && (entry->the_bfd->flags & DYNAMIC) != 0)
- {
- char *needed_name;
-
- ASSERT (entry->is_archive && entry->search_dirs_flag);
- needed_name = (char *) xmalloc (strlen (filename)
- + strlen (arch)
- + sizeof "lib.so");
- sprintf (needed_name, "lib%s%s.so", filename, arch);
- bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
- }
-
- return true;
+ config.dynamic_link = ${DYNAMIC_LINK-TRUE};
+ config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
}
-EOF
-if [ "x${host}" = "x${target}" ] ; then
- case " ${EMULATION_LIBPATH} " in
- *" ${EMULATION_NAME} "*)
-cat >>e${EMULATION_NAME}.c <<EOF
-
-/* For a native linker, check the file /etc/ld.so.conf for directories
- in which we may find shared libraries. /etc/ld.so.conf is really
- only meaningful on Linux, but we check it on other systems anyhow. */
-
-static boolean gld${EMULATION_NAME}_check_ld_so_conf
- PARAMS ((const char *, int));
-
-static boolean
-gld${EMULATION_NAME}_check_ld_so_conf (name, force)
- const char *name;
- int force;
-{
- static boolean initialized;
- static char *ld_so_conf;
-
- if (! initialized)
- {
- FILE *f;
-
- f = fopen ("/etc/ld.so.conf", FOPEN_RT);
- if (f != NULL)
- {
- char *b;
- size_t len, alloc;
- int c;
-
- len = 0;
- alloc = 100;
- b = (char *) xmalloc (alloc);
-
- while ((c = getc (f)) != EOF)
- {
- if (len + 1 >= alloc)
- {
- alloc *= 2;
- b = (char *) xrealloc (b, alloc);
- }
- if (c != ':'
- && c != ' '
- && c != '\t'
- && c != '\n'
- && c != ',')
- {
- b[len] = c;
- ++len;
- }
- else
- {
- if (len > 0 && b[len - 1] != ':')
- {
- b[len] = ':';
- ++len;
- }
- }
- }
-
- if (len > 0 && b[len - 1] == ':')
- --len;
-
- if (len > 0)
- b[len] = '\0';
- else
- {
- free (b);
- b = NULL;
- }
-
- fclose (f);
-
- ld_so_conf = b;
- }
-
- initialized = true;
- }
-
- if (ld_so_conf == NULL)
- return false;
-
- return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
-}
-
-EOF
- ;;
- esac
-fi
-cat >>e${EMULATION_NAME}.c <<EOF
-
-/* These variables are required to pass information back and forth
- between after_open and check_needed and stat_needed and vercheck. */
-
-static struct bfd_link_needed_list *global_needed;
-static struct stat global_stat;
-static boolean global_found;
-static struct bfd_link_needed_list *global_vercheck_needed;
-static boolean global_vercheck_failed;
-
static void
-gld${EMULATION_NAME}_after_open ()
+arm_elf_after_open (void)
{
- struct bfd_link_needed_list *needed, *l;
-
if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
{
/* The arm backend needs special fields in the output hash structure.
{
LANG_FOR_EACH_INPUT_STATEMENT (is)
{
- /* The interworking bfd must be the last one to be processed */
- if (!is->next)
- bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info);
+ bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info);
}
}
- /* We only need to worry about this when doing a final link. */
- if (link_info.relocateable || link_info.shared)
- return;
-
- /* Get the list of files which appear in DT_NEEDED entries in
- dynamic objects included in the link (often there will be none).
- For each such file, we want to track down the corresponding
- library, and include the symbol table in the link. This is what
- the runtime dynamic linker will do. Tracking the files down here
- permits one dynamic object to include another without requiring
- special action by the person doing the link. Note that the
- needed list can actually grow while we are stepping through this
- loop. */
- needed = bfd_elf_get_needed_list (output_bfd, &link_info);
- for (l = needed; l != NULL; l = l->next)
- {
- struct bfd_link_needed_list *ll;
- int force;
-
- /* If we've already seen this file, skip it. */
- for (ll = needed; ll != l; ll = ll->next)
- if (strcmp (ll->name, l->name) == 0)
- break;
- if (ll != l)
- continue;
-
- /* See if this file was included in the link explicitly. */
- global_needed = l;
- global_found = false;
- lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
- if (global_found)
- continue;
-
- /* We need to find this file and include the symbol table. We
- want to search for the file in the same way that the dynamic
- linker will search. That means that we want to use
- rpath_link, rpath, then the environment variable
- LD_LIBRARY_PATH (native only), then the linker script
- LIB_SEARCH_DIRS. We do not search using the -L arguments.
-
- We search twice. The first time, we skip objects which may
- introduce version mismatches. The second time, we force
- their use. See gld${EMULATION_NAME}_vercheck comment. */
- for (force = 0; force < 2; force++)
- {
- const char *lib_path;
- size_t len;
- search_dirs_type *search;
-
- if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
- l->name, force))
- break;
- if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
- l->name, force))
- break;
- if (command_line.rpath_link == NULL
- && command_line.rpath == NULL)
- {
- lib_path = (const char *) getenv ("LD_RUN_PATH");
- if (gld${EMULATION_NAME}_search_needed (lib_path, l->name,
- force))
- break;
- }
-EOF
-if [ "x${host}" = "x${target}" ] ; then
- case " ${EMULATION_LIBPATH} " in
- *" ${EMULATION_NAME} "*)
-cat >>e${EMULATION_NAME}.c <<EOF
- lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
- if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force))
- break;
-EOF
- ;;
- esac
-fi
-cat >>e${EMULATION_NAME}.c <<EOF
- len = strlen (l->name);
- for (search = search_head; search != NULL; search = search->next)
- {
- char *filename;
-
- if (search->cmdline)
- continue;
- filename = (char *) xmalloc (strlen (search->name) + len + 2);
- sprintf (filename, "%s/%s", search->name, l->name);
- if (gld${EMULATION_NAME}_try_needed (filename, force))
- break;
- free (filename);
- }
- if (search != NULL)
- break;
-EOF
-if [ "x${host}" = "x${target}" ] ; then
- case " ${EMULATION_LIBPATH} " in
- *" ${EMULATION_NAME} "*)
-cat >>e${EMULATION_NAME}.c <<EOF
- if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
- break;
-EOF
- ;;
- esac
-fi
-cat >>e${EMULATION_NAME}.c <<EOF
- }
-
- if (force < 2)
- continue;
-
- einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
- l->name, l->by);
- }
-}
-
-/* Search for a needed file in a path. */
-
-static boolean
-gld${EMULATION_NAME}_search_needed (path, name, force)
- const char *path;
- const char *name;
- int force;
-{
- const char *s;
- size_t len;
-
- if (path == NULL || *path == '\0')
- return false;
- len = strlen (name);
- while (1)
- {
- char *filename, *sset;
-
- s = strchr (path, ':');
- if (s == NULL)
- s = path + strlen (path);
-
- filename = (char *) xmalloc (s - path + len + 2);
- if (s == path)
- sset = filename;
- else
- {
- memcpy (filename, path, s - path);
- filename[s - path] = '/';
- sset = filename + (s - path) + 1;
- }
- strcpy (sset, name);
-
- if (gld${EMULATION_NAME}_try_needed (filename, force))
- return true;
-
- free (filename);
-
- if (*s == '\0')
- break;
- path = s + 1;
- }
-
- return false;
-}
-
-/* This function is called for each possible name for a dynamic object
- named by a DT_NEEDED entry. The FORCE parameter indicates whether
- to skip the check for a conflicting version. */
-
-static boolean
-gld${EMULATION_NAME}_try_needed (name, force)
- const char *name;
- int force;
-{
- bfd *abfd;
-
- abfd = bfd_openr (name, bfd_get_target (output_bfd));
- if (abfd == NULL)
- return false;
- if (! bfd_check_format (abfd, bfd_object))
- {
- (void) bfd_close (abfd);
- return false;
- }
- if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
- {
- (void) bfd_close (abfd);
- return false;
- }
-
- /* Check whether this object would include any conflicting library
- versions. If FORCE is set, then we skip this check; we use this
- the second time around, if we couldn't find any compatible
- instance of the shared library. */
-
- if (! force)
- {
- struct bfd_link_needed_list *needed;
-
- if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
- einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
-
- if (needed != NULL)
- {
- global_vercheck_needed = needed;
- global_vercheck_failed = false;
- lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
- if (global_vercheck_failed)
- {
- (void) bfd_close (abfd);
- /* Return false to force the caller to move on to try
- another file on the search path. */
- return false;
- }
-
- /* But wait! It gets much worse. On Linux, if a shared
- library does not use libc at all, we are supposed to skip
- it the first time around in case we encounter a shared
- library later on with the same name which does use the
- version of libc that we want. This is much too horrible
- to use on any system other than Linux. */
-
-EOF
-case ${target} in
- *-*-linux-gnu*)
- cat >>e${EMULATION_NAME}.c <<EOF
- {
- struct bfd_link_needed_list *l;
-
- for (l = needed; l != NULL; l = l->next)
- if (strncmp (l->name, "libc.so", 7) == 0)
- break;
- if (l == NULL)
- {
- (void) bfd_close (abfd);
- return false;
- }
- }
-
-EOF
- ;;
-esac
-cat >>e${EMULATION_NAME}.c <<EOF
- }
- }
-
- /* We've found a dynamic object matching the DT_NEEDED entry. */
-
- /* We have already checked that there is no other input file of the
- same name. We must now check again that we are not including the
- same file twice. We need to do this because on many systems
- libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
- reference libc.so.1. If we have already included libc.so, we
- don't want to include libc.so.1 if they are the same file, and we
- can only check that using stat. */
-
- if (bfd_stat (abfd, &global_stat) != 0)
- einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
- global_found = false;
- lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
- if (global_found)
- {
- /* Return true to indicate that we found the file, even though
- we aren't going to do anything with it. */
- return true;
- }
-
- /* Tell the ELF backend that don't want the output file to have a
- DT_NEEDED entry for this file. */
- bfd_elf_set_dt_needed_name (abfd, "");
-
- /* Add this file into the symbol table. */
- if (! bfd_link_add_symbols (abfd, &link_info))
- einfo ("%F%B: could not read symbols: %E\n", abfd);
-
- return true;
+ /* Call the standard elf routine. */
+ gld${EMULATION_NAME}_after_open ();
}
-/* See if an input file matches a DT_NEEDED entry by name. */
-
static void
-gld${EMULATION_NAME}_check_needed (s)
- lang_input_statement_type *s;
+arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement)
{
- if (global_found)
- return;
-
- if (s->filename != NULL
- && strcmp (s->filename, global_needed->name) == 0)
- {
- global_found = true;
- return;
- }
-
- if (s->the_bfd != NULL)
+ if (statement->header.type == lang_input_section_enum)
{
- const char *soname;
+ asection *i = statement->input_section.section;
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname != NULL
- && strcmp (soname, global_needed->name) == 0)
+ if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+ && (i->flags & SEC_EXCLUDE) == 0)
{
- global_found = true;
- return;
- }
- }
-
- if (s->search_dirs_flag
- && s->filename != NULL
- && strchr (global_needed->name, '/') == NULL)
- {
- const char *f;
+ asection *output_section = i->output_section;
- f = strrchr (s->filename, '/');
- if (f != NULL
- && strcmp (f + 1, global_needed->name) == 0)
- {
- global_found = true;
- return;
- }
- }
-}
-
-/* See if an input file matches a DT_NEEDED entry by running stat on
- the file. */
-
-static void
-gld${EMULATION_NAME}_stat_needed (s)
- lang_input_statement_type *s;
-{
- struct stat st;
- const char *suffix;
- const char *soname;
- const char *f;
+ ASSERT (output_section->owner == output_bfd);
- if (global_found)
- return;
- if (s->the_bfd == NULL)
- return;
-
- if (bfd_stat (s->the_bfd, &st) != 0)
- {
- einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
- return;
- }
-
- if (st.st_dev == global_stat.st_dev
- && st.st_ino == global_stat.st_ino)
- {
- global_found = true;
- return;
- }
-
- /* We issue a warning if it looks like we are including two
- different versions of the same shared library. For example,
- there may be a problem if -lc picks up libc.so.6 but some other
- shared library has a DT_NEEDED entry of libc.so.5. This is a
- hueristic test, and it will only work if the name looks like
- NAME.so.VERSION. FIXME: Depending on file names is error-prone.
- If we really want to issue warnings about mixing version numbers
- of shared libraries, we need to find a better way. */
-
- if (strchr (global_needed->name, '/') != NULL)
- return;
- suffix = strstr (global_needed->name, ".so.");
- if (suffix == NULL)
- return;
- suffix += sizeof ".so." - 1;
-
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname == NULL)
- soname = s->filename;
-
- f = strrchr (soname, '/');
- if (f != NULL)
- ++f;
- else
- f = soname;
-
- if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0)
- einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
- global_needed->name, global_needed->by, f);
-}
-
-/* On Linux, it's possible to have different versions of the same
- shared library linked against different versions of libc. The
- dynamic linker somehow tags which libc version to use in
- /etc/ld.so.cache, and, based on the libc that it sees in the
- executable, chooses which version of the shared library to use.
-
- We try to do a similar check here by checking whether this shared
- library needs any other shared libraries which may conflict with
- libraries we have already included in the link. If it does, we
- skip it, and try to find another shared library farther on down the
- link path.
-
- This is called via lang_for_each_input_file.
- GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
- which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find
- a conflicting version. */
-
-static void
-gld${EMULATION_NAME}_vercheck (s)
- lang_input_statement_type *s;
-{
- const char *soname, *f;
- struct bfd_link_needed_list *l;
-
- if (global_vercheck_failed)
- return;
- if (s->the_bfd == NULL
- || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
- return;
-
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname == NULL)
- soname = bfd_get_filename (s->the_bfd);
-
- f = strrchr (soname, '/');
- if (f != NULL)
- ++f;
- else
- f = soname;
-
- for (l = global_vercheck_needed; l != NULL; l = l->next)
- {
- const char *suffix;
-
- if (strcmp (f, l->name) == 0)
- {
- /* Probably can't happen, but it's an easy check. */
- continue;
- }
-
- if (strchr (l->name, '/') != NULL)
- continue;
-
- suffix = strstr (l->name, ".so.");
- if (suffix == NULL)
- continue;
-
- suffix += sizeof ".so." - 1;
-
- if (strncmp (f, l->name, suffix - l->name) == 0)
- {
- /* Here we know that S is a dynamic object FOO.SO.VER1, and
- the object we are considering needs a dynamic object
- FOO.SO.VER2, and VER1 and VER2 are different. This
- appears to be a version mismatch, so we tell the caller
- to try a different version of this library. */
- global_vercheck_failed = true;
- return;
- }
- }
-}
-
-/* Place an orphan section. We use this to put random SHF_ALLOC
- sections in the right segment. */
-
-struct orphan_save
-{
- lang_output_section_statement_type *os;
- asection **section;
- lang_statement_union_type **stmt;
-};
-
-/*ARGSUSED*/
-static boolean
-gld${EMULATION_NAME}_place_orphan (file, s)
- lang_input_statement_type *file;
- asection *s;
-{
- static struct orphan_save hold_text;
- static struct orphan_save hold_rodata;
- static struct orphan_save hold_data;
- static struct orphan_save hold_bss;
- static struct orphan_save hold_rel;
- static struct orphan_save hold_interp;
- struct orphan_save *place;
- lang_statement_list_type *old;
- lang_statement_list_type add;
- etree_type *address;
- const char *secname, *ps;
- const char *outsecname;
- lang_output_section_statement_type *os;
-
- secname = bfd_get_section_name (s->owner, s);
-
- /* Look through the script to see where to place this section. */
- os = lang_output_section_find (secname);
-
- if (os != NULL
- && os->bfd_section != NULL
- && ((s->flags ^ os->bfd_section->flags) & (SEC_LOAD | SEC_ALLOC)) == 0)
- {
- /* We have already placed a section with this name. */
- wild_doit (&os->children, s, os, file);
- return true;
- }
-
- if (hold_text.os == NULL)
- hold_text.os = lang_output_section_find (".text");
-
- /* If this is a final link, then always put .gnu.warning.SYMBOL
- sections into the .text section to get them out of the way. */
- if (! link_info.shared
- && ! link_info.relocateable
- && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
- && hold_text.os != NULL)
- {
- wild_doit (&hold_text.os->children, s, hold_text.os, file);
- return true;
- }
-
- /* Decide which segment the section should go in based on the
- section name and section flags. We put loadable .note sections
- right after the .interp section, so that the PT_NOTE segment is
- stored right after the program headers where the OS can read it
- in the first page. */
-#define HAVE_SECTION(hold, name) \
-(hold.os != NULL || (hold.os = lang_output_section_find (name)) != NULL)
-
- if (s->flags & SEC_EXCLUDE)
- return false;
- else if ((s->flags & SEC_ALLOC) == 0)
- place = NULL;
- else if ((s->flags & SEC_LOAD) != 0
- && strncmp (secname, ".note", 4) == 0
- && HAVE_SECTION (hold_interp, ".interp"))
- place = &hold_interp;
- else if ((s->flags & SEC_HAS_CONTENTS) == 0
- && HAVE_SECTION (hold_bss, ".bss"))
- place = &hold_bss;
- else if ((s->flags & SEC_READONLY) == 0
- && HAVE_SECTION (hold_data, ".data"))
- place = &hold_data;
- else if (strncmp (secname, ".rel", 4) == 0
- && (hold_rel.os != NULL
- || (hold_rel.os = output_rel_find ()) != NULL))
- place = &hold_rel;
- else if ((s->flags & SEC_CODE) == 0
- && (s->flags & SEC_READONLY) != 0
- && HAVE_SECTION (hold_rodata, ".rodata"))
- place = &hold_rodata;
- else if ((s->flags & SEC_READONLY) != 0
- && hold_text.os != NULL)
- place = &hold_text;
- else
- place = NULL;
-
-#undef HAVE_SECTION
-
- /* Choose a unique name for the section. This will be needed if the
- same section name appears in the input file with different
- loadable or allocateable characteristics. */
- outsecname = secname;
- if (bfd_get_section_by_name (output_bfd, outsecname) != NULL)
- {
- unsigned int len;
- char *newname;
- unsigned int i;
-
- len = strlen (outsecname);
- newname = xmalloc (len + 5);
- strcpy (newname, outsecname);
- i = 0;
- do
- {
- sprintf (newname + len, "%d", i);
- ++i;
- }
- while (bfd_get_section_by_name (output_bfd, newname) != NULL);
-
- outsecname = newname;
- }
-
- if (place != NULL)
- {
- /* Start building a list of statements for this section. */
- old = stat_ptr;
- stat_ptr = &add;
- lang_list_init (stat_ptr);
-
- /* If the name of the section is representable in C, then create
- symbols to mark the start and the end of the section. */
- for (ps = outsecname; *ps != '\0'; ps++)
- if (! isalnum ((unsigned char) *ps) && *ps != '_')
- break;
- if (*ps == '\0' && config.build_constructors)
- {
- char *symname;
- etree_type *e_align;
-
- symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
- sprintf (symname, "__start_%s", outsecname);
- e_align = exp_unop (ALIGN_K,
- exp_intop ((bfd_vma) 1 << s->alignment_power));
- lang_add_assignment (exp_assop ('=', symname, e_align));
- }
- }
-
- if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
- address = exp_intop ((bfd_vma) 0);
- else
- address = NULL;
-
- os = lang_enter_output_section_statement (outsecname, address, 0,
- (bfd_vma) 0,
- (etree_type *) NULL,
- (etree_type *) NULL,
- (etree_type *) NULL);
-
- wild_doit (&os->children, s, os, file);
-
- lang_leave_output_section_statement
- ((bfd_vma) 0, "*default*",
- (struct lang_output_section_phdr_list *) NULL, "*default*");
-
- if (place != NULL)
- {
- asection *snew, **pps;
-
- stat_ptr = &add;
-
- if (*ps == '\0' && config.build_constructors)
- {
- char *symname;
-
- symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
- sprintf (symname, "__stop_%s", outsecname);
- lang_add_assignment (exp_assop ('=', symname,
- exp_nameop (NAME, ".")));
- }
- stat_ptr = old;
-
- snew = os->bfd_section;
- if (place->os->bfd_section != NULL || place->section != NULL)
- {
- /* Shuffle the section to make the output file look neater. */
- if (place->section == NULL)
+ /* Don't attach the interworking stubs to a dynamic object, to
+ an empty section, etc. */
+ if ((output_section->flags & SEC_HAS_CONTENTS) != 0
+ && (i->flags & SEC_NEVER_LOAD) == 0
+ && ! (i->owner->flags & DYNAMIC)
+ && ! i->owner->output_has_begun)
{
-#if 0
- /* Finding the end of the list is a little tricky. We
- make a wild stab at it by comparing section flags. */
- flagword first_flags = place->os->bfd_section->flags;
- for (pps = &place->os->bfd_section->next;
- *pps != NULL && (*pps)->flags == first_flags;
- pps = &(*pps)->next)
- ;
- place->section = pps;
-#else
- /* Put orphans after the first section on the list. */
- place->section = &place->os->bfd_section->next;
-#endif
+ bfd_for_interwork = i->owner;
+ bfd_for_interwork->output_has_begun = TRUE;
}
-
- /* Unlink the section. */
- for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
- ;
- *pps = snew->next;
-
- /* Now tack it on to the "place->os" section list. */
- snew->next = *place->section;
- *place->section = snew;
- }
- place->section = &snew->next; /* Save the end of this list. */
-
- if (place->stmt == NULL)
- {
- /* Put the new statement list right at the head. */
- *add.tail = place->os->header.next;
- place->os->header.next = add.head;
- }
- else
- {
- /* Put it after the last orphan statement we added. */
- *add.tail = *place->stmt;
- *place->stmt = add.head;
- }
- place->stmt = add.tail; /* Save the end of this list. */
- }
-
- return true;
-}
-
-/* A variant of lang_output_section_find. */
-static lang_output_section_statement_type *
-output_rel_find ()
-{
- lang_statement_union_type *u;
- lang_output_section_statement_type *lookup;
-
- for (u = lang_output_section_statement.head;
- u != (lang_statement_union_type *) NULL;
- u = lookup->next)
- {
- lookup = &u->output_section_statement;
- if (strncmp (".rel", lookup->name, 4) == 0
- && lookup->bfd_section != NULL
- && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
- {
- return lookup;
}
}
- return (lang_output_section_statement_type *) NULL;
}
-/* Look through an expression for an assignment statement. */
-
static void
-gld${EMULATION_NAME}_find_exp_assignment (exp)
- etree_type *exp;
+arm_elf_before_allocation (void)
{
- struct bfd_link_hash_entry *h;
+ bfd *tem;
- switch (exp->type.node_class)
- {
- case etree_provide:
- h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
- false, false, false);
- if (h == NULL)
- break;
-
- /* We call record_link_assignment even if the symbol is defined.
- This is because if it is defined by a dynamic object, we
- actually want to use the value defined by the linker script,
- not the value from the dynamic object (because we are setting
- symbols like etext). If the symbol is defined by a regular
- object, then, as it happens, calling record_link_assignment
- will do no harm. */
-
- /* Fall through. */
- case etree_assign:
- if (strcmp (exp->assign.dst, ".") != 0)
- {
- if (! (bfd_elf${ELFSIZE}_record_link_assignment
- (output_bfd, &link_info, exp->assign.dst,
- exp->type.node_class == etree_provide ? true : false)))
- einfo ("%P%F: failed to record assignment to %s: %E\n",
- exp->assign.dst);
- }
- gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
- break;
-
- case etree_binary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
- gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
- break;
-
- case etree_trinary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
- break;
-
- case etree_unary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
- break;
+ /* Call the standard elf routine. */
+ gld${EMULATION_NAME}_before_allocation ();
- default:
- break;
- }
-}
-
-/* This is called by the before_allocation routine via
- lang_for_each_statement. It locates any assignment statements, and
- tells the ELF backend about them, in case they are assignments to
- symbols which are referred to by dynamic objects. */
-
-static void
-gld${EMULATION_NAME}_find_statement_assignment (s)
- lang_statement_union_type *s;
-{
- if (s->header.type == lang_assignment_statement_enum)
- gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
-}
-
-/* This is called after the sections have been attached to output
- sections, but before any sizes or addresses have been set. */
-
-static void
-gld${EMULATION_NAME}_before_allocation ()
-{
- const char *rpath;
- asection *sinterp;
-
- /* If we are going to make any variable assignments, we need to let
- the ELF backend know about them in case the variables are
- referred to by dynamic objects. */
- lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment);
-
- /* Let the ELF backend work out the sizes of any sections required
- by dynamic linking. */
- rpath = command_line.rpath;
- if (rpath == NULL)
- rpath = (const char *) getenv ("LD_RUN_PATH");
- if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
- (output_bfd, command_line.soname, rpath,
- command_line.export_dynamic, command_line.filter_shlib,
- (const char * const *) command_line.auxiliary_filters,
- &link_info, &sinterp, lang_elf_version_info)))
- einfo ("%P%F: failed to set dynamic section sizes: %E\n");
-
- /* Let the user override the dynamic linker we are using. */
- if (command_line.interpreter != NULL
- && sinterp != NULL)
+ if (link_info.input_bfds != NULL)
{
- sinterp->contents = (bfd_byte *) command_line.interpreter;
- sinterp->_raw_size = strlen (command_line.interpreter) + 1;
+ /* The interworking bfd must be the last one in the link. */
+ bfd_for_interwork = NULL;
+ for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next)
+ tem->output_has_begun = FALSE;
+
+ lang_for_each_statement (arm_elf_set_bfd_for_interworking);
+ for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next)
+ tem->output_has_begun = FALSE;
+
+ /* If bfd_for_interwork is NULL, then there are no loadable sections
+ with real contents to be linked, so we are not going to have to
+ create any interworking stubs, so it is OK not to call
+ bfd_elf32_arm_get_bfd_for_interworking. */
+ if (bfd_for_interwork != NULL)
+ bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info);
}
+ /* We should be able to set the size of the interworking stub section. */
- /* Look for any sections named .gnu.warning. As a GNU extensions,
- we treat such sections as containing warning messages. We print
- out the warning message, and then zero out the section size so
- that it does not get copied into the output file. */
-
- {
- LANG_FOR_EACH_INPUT_STATEMENT (is)
- {
- asection *s;
- bfd_size_type sz;
- char *msg;
- boolean ret;
-
- if (is->just_syms_flag)
- continue;
-
- s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
- if (s == NULL)
- continue;
-
- sz = bfd_section_size (is->the_bfd, s);
- msg = xmalloc ((size_t) sz + 1);
- if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz))
- einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n",
- is->the_bfd);
- msg[sz] = '\0';
- ret = link_info.callbacks->warning (&link_info, msg,
- (const char *) NULL,
- is->the_bfd, (asection *) NULL,
- (bfd_vma) 0);
- ASSERT (ret);
- free (msg);
-
- /* Clobber the section size, so that we don't waste copying the
- warning into the output file. */
- s->_raw_size = 0;
- }
- }
-
- /* we should be able to set the size of the interworking stub section */
-
- /* Here we rummage through the found bfds to collect glue information */
- /* FIXME: should this be based on a command line option? krk@cygnus.com */
+ /* Here we rummage through the found bfds to collect glue information. */
+ /* FIXME: should this be based on a command line option? krk@cygnus.com */
{
LANG_FOR_EACH_INPUT_STATEMENT (is)
{
if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info,
- no_pipeline_knowledge))
+ byteswap_code))
{
/* xgettext:c-format */
einfo (_("Errors encountered processing file %s"), is->filename);
}
}
- /* We have seen it all. Allocate it, and carry on */
+ /* We have seen it all. Allocate it, and carry on. */
bfd_elf32_arm_allocate_interworking_sections (& link_info);
}
static void
-gld${EMULATION_NAME}_finish PARAMS((void))
+arm_elf_finish (void)
{
struct bfd_link_hash_entry * h;
- if (thumb_entry_symbol == NULL)
- return;
-
- h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true);
+ /* Call the elf32.em routine. */
+ gld${EMULATION_NAME}_finish ();
+
+ if (thumb_entry_symbol)
+ {
+ h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
+ FALSE, FALSE, TRUE);
+ }
+ else
+ {
+ struct elf_link_hash_entry * eh;
+
+ if (!entry_symbol.name)
+ return;
+
+ h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
+ FALSE, FALSE, TRUE);
+ eh = (struct elf_link_hash_entry *)h;
+ if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC)
+ return;
+ }
+
if (h != (struct bfd_link_hash_entry *) NULL
&& (h->type == bfd_link_hash_defined
{
static char buffer[32];
bfd_vma val;
-
+
/* Special procesing is required for a Thumb entry symbol. The
bottom bit of its address must be set. */
val = (h->u.def.value
+ bfd_get_section_vma (output_bfd,
h->u.def.section->output_section)
+ h->u.def.section->output_offset);
-
+
val |= 1;
/* Now convert this value into a string and store it in entry_symbol
- where the lang_finish() function will pick it up. */
+ where the lang_finish() function will pick it up. */
buffer[0] = '0';
buffer[1] = 'x';
-
+
sprintf_vma (buffer + 2, val);
- if (entry_symbol != NULL && entry_from_cmdline)
+ if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
+ && entry_from_cmdline)
einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
- thumb_entry_symbol, entry_symbol);
- entry_symbol = buffer;
+ thumb_entry_symbol, entry_symbol.name);
+ entry_symbol.name = buffer;
}
else
- einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
+ einfo (_("%P: warning: connot find thumb start symbol %s\n"),
+ thumb_entry_symbol);
+}
+
+/* This is a convenitent point to tell BFD about target specific flags.
+ After the output has been created, but before inputs are read. */
+static void
+arm_elf_create_output_section_statements (void)
+{
+ bfd_elf32_arm_set_target_relocs (&link_info, target1_is_rel, target2_type,
+ fix_v4bx, use_blx);
}
-static char *
-gld${EMULATION_NAME}_get_script (isfile)
- int *isfile;
EOF
-if test -n "$COMPILE_IN"
-then
-# Scripts compiled in.
+# 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_THUMB_ENTRY 301
+#define OPTION_BE8 302
+#define OPTION_TARGET1_REL 303
+#define OPTION_TARGET1_ABS 304
+#define OPTION_TARGET2 305
+#define OPTION_FIX_V4BX 306
+#define OPTION_USE_BLX 307
+'
+
+PARSE_AND_LIST_SHORTOPTS=p
+
+PARSE_AND_LIST_LONGOPTS='
+ { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
+ { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
+ { "be8", no_argument, NULL, OPTION_BE8},
+ { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL},
+ { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
+ { "target2", required_argument, NULL, OPTION_TARGET2},
+ { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
+ { "use-blx", no_argument, NULL, OPTION_USE_BLX},
+'
+
+PARSE_AND_LIST_OPTIONS='
+ fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
+ fprintf (file, _(" --be8 Oputput BE8 format image\n"));
+ fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
+ fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
+ fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n"));
+ fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n"));
+ fprintf (file, _(" --use-blx Enable use of BLX instructions\n"));
+'
+
+PARSE_AND_LIST_ARGS_CASES='
+ case '\'p\'':
+ /* Only here for backwards compatibility. */
+ break;
+
+ case OPTION_THUMB_ENTRY:
+ thumb_entry_symbol = optarg;
+ break;
-# sed commands to quote an ld script as a C string.
-sc="-f stringify.sed"
+ case OPTION_BE8:
+ byteswap_code = 1;
+ break;
-cat >>e${EMULATION_NAME}.c <<EOF
-{
- *isfile = 0;
+ case OPTION_TARGET1_REL:
+ target1_is_rel = 1;
+ break;
- 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${EMULATION_NAME}.c
-if test -n "$GENERATE_SHLIB_SCRIPT" ; then
- echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
- sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
-fi
-echo ' ; else return' >> e${EMULATION_NAME}.c
-sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
-echo '; }' >> e${EMULATION_NAME}.c
+ case OPTION_TARGET1_ABS:
+ target1_is_rel = 0;
+ break;
-else
-# Scripts read from the filesystem.
+ case OPTION_TARGET2:
+ target2_type = optarg;
+ break;
-cat >>e${EMULATION_NAME}.c <<EOF
-{
- *isfile = 1;
+ case OPTION_FIX_V4BX:
+ fix_v4bx = 1;
+ break;
- if (link_info.relocateable == true && config.build_constructors == true)
- return "ldscripts/${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/${EMULATION_NAME}.xn";
- else if (link_info.shared)
- return "ldscripts/${EMULATION_NAME}.xs";
- else
- return "ldscripts/${EMULATION_NAME}.x";
-}
-EOF
+ case OPTION_USE_BLX:
+ use_blx = 1;
+ break;
+'
-fi
+# We have our own after_open and before_allocation functions, but they call
+# the standard routines, so give them a different name.
+LDEMUL_AFTER_OPEN=arm_elf_after_open
+LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
+LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
-cat >>e${EMULATION_NAME}.c <<EOF
+# Replace the elf before_parse function with our own.
+LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
-struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
-{
- gld${EMULATION_NAME}_before_parse,
- syslib_default,
- hll_default,
- after_parse_default,
- gld${EMULATION_NAME}_after_open,
- after_allocation_default,
- set_output_arch_default,
- ldemul_default_target,
- gld${EMULATION_NAME}_before_allocation,
- gld${EMULATION_NAME}_get_script,
- "${EMULATION_NAME}",
- "${OUTPUT_FORMAT}",
- gld${EMULATION_NAME}_finish,
- NULL, /* create output section statements */
- gld${EMULATION_NAME}_open_dynamic_archive,
- gld${EMULATION_NAME}_place_orphan,
- NULL, /* set symbols */
- gld${EMULATION_NAME}_parse_args,
- NULL, /* unrecognized file */
- gld${EMULATION_NAME}_list_options,
- NULL, /* recognized file */
- NULL /* find_potential_libraries */
-};
-EOF
+# Call the extra arm-elf function
+LDEMUL_FINISH=arm_elf_finish
projects / external / binutils.git / blobdiff