# This file is now misnamed, because it supports both 32 bit and 64 bit
# ELF emulations.
test -z "${ELFSIZE}" && ELFSIZE=32
+if [ -z "$MACHINE" ]; then
+ OUTPUT_ARCH=${ARCH}
+else
+ OUTPUT_ARCH=${ARCH}:${MACHINE}
+fi
cat >e${EMULATION_NAME}.c <<EOF
/* This file is is generated by a shell script. DO NOT EDIT! */
/* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}
- Copyright (C) 1991, 93, 94, 95, 96, 97, 98, 1999
+ Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
Free Software Foundation, Inc.
Written by Steve Chamberlain <sac@cygnus.com>
ELF support by Ian Lance Taylor <ian@cygnus.com>
#include "bfd.h"
#include "sysdep.h"
-
-#include <ctype.h>
+#include "libiberty.h"
+#include "safe-ctype.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldmain.h"
-#include "ldemul.h"
-#include "ldfile.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
+#include "ldfile.h"
+#include "ldemul.h"
#include "ldgram.h"
+#include "elf/common.h"
-static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
-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${EMULATION_NAME}_check_needed
+static void gld${EMULATION_NAME}_before_parse
+ PARAMS ((void));
+static void gld${EMULATION_NAME}_vercheck
PARAMS ((lang_input_statement_type *));
static void gld${EMULATION_NAME}_stat_needed
PARAMS ((lang_input_statement_type *));
+static boolean gld${EMULATION_NAME}_try_needed
+ PARAMS ((const char *, int));
static boolean gld${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
+static void gld${EMULATION_NAME}_check_needed
PARAMS ((lang_input_statement_type *));
-static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
+static void gld${EMULATION_NAME}_after_open
+ PARAMS ((void));
+static void gld${EMULATION_NAME}_find_exp_assignment
+ PARAMS ((etree_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 void gld${EMULATION_NAME}_before_allocation
+ PARAMS ((void));
+static boolean gld${EMULATION_NAME}_open_dynamic_archive
+ PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
+static lang_output_section_statement_type *output_rel_find
+ PARAMS ((void));
+static asection *output_prev_sec_find
+ PARAMS ((lang_output_section_statement_type *));
static boolean gld${EMULATION_NAME}_place_orphan
PARAMS ((lang_input_statement_type *, asection *));
-static void gld${EMULATION_NAME}_place_section
- PARAMS ((lang_statement_union_type *));
-static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
+static char *gld${EMULATION_NAME}_get_script
+ PARAMS ((int *isfile));
+
+EOF
+
+# Import any needed special functions and/or overrides.
+#
+if test -n "$EXTRA_EM_FILE" ; then
+. ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
+fi
+
+# Functions in this file can be overridden by setting the LDEMUL_* shell
+# variables. If the name of the overriding function is the same as is
+# defined in this file, then don't output this file's version.
+# If a different overriding name is given then output the standard function
+# as presumably it is called from the overriding function.
+#
+if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
+cat >>e${EMULATION_NAME}.c <<EOF
static void
-gld${EMULATION_NAME}_before_parse()
+gld${EMULATION_NAME}_before_parse ()
{
- ldfile_output_architecture = bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`;
+ const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}");
+ if (arch)
+ {
+ ldfile_output_architecture = arch->arch;
+ ldfile_output_machine = arch->mach;
+ ldfile_output_machine_name = arch->printable_name;
+ }
+ else
+ ldfile_output_architecture = bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`;
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 (or .sl on oddball systems
- like hpux). */
+EOF
+fi
-static boolean
-gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
- const char *arch;
- search_dirs_type *search;
- lang_input_statement_type *entry;
-{
- const char *filename;
- char *string;
+cat >>e${EMULATION_NAME}.c <<EOF
- if (! entry->is_archive)
- return false;
+/* These variables are required to pass information back and forth
+ between after_open and check_needed and stat_needed and vercheck. */
- filename = entry->filename;
+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;
- /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
- is defined, but it does not seem worth the headache to optimize
- away those two bytes of space. */
- string = (char *) xmalloc (strlen (search->name)
- + strlen (filename)
- + strlen (arch)
-#ifdef EXTRA_SHLIB_EXTENSION
- + strlen (EXTRA_SHLIB_EXTENSION)
-#endif
- + sizeof "/lib.so");
- sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
+/* 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.
-#ifdef EXTRA_SHLIB_EXTENSION
- /* Try the .so extension first. If that fails build a new filename
- using EXTRA_SHLIB_EXTENSION. */
- if (! ldfile_try_open_bfd (string, entry))
- sprintf (string, "%s/lib%s%s%s", search->name,
- filename, arch, EXTRA_SHLIB_EXTENSION);
-#endif
+ 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.
- if (! ldfile_try_open_bfd (string, entry))
+ This is called via lang_for_each_input_file.
+ GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object
+ which we are 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;
+ 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 = basename (bfd_get_filename (s->the_bfd));
+
+ for (l = global_vercheck_needed; l != NULL; l = l->next)
{
- free (string);
- return false;
+ const char *suffix;
+
+ if (strcmp (soname, 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 (soname, 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;
+ }
}
+}
- 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.
+/* See if an input file matches a DT_NEEDED entry by running stat on
+ the file. */
- 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)
+static void
+gld${EMULATION_NAME}_stat_needed (s)
+ lang_input_statement_type *s;
+{
+ struct stat st;
+ const char *suffix;
+ const char *soname;
+
+ if (global_found)
+ return;
+ if (s->the_bfd == NULL)
+ return;
+
+ if (bfd_stat (s->the_bfd, &st) != 0)
{
- char *needed_name;
+ einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
+ return;
+ }
- ASSERT (entry->is_archive && entry->search_dirs_flag);
+ if (st.st_dev == global_stat.st_dev
+ && st.st_ino == global_stat.st_ino)
+ {
+ global_found = true;
+ return;
+ }
- /* Rather than duplicating the logic above. Just use the
- filename we recorded earlier.
+ /* 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
+ heuristic 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. */
- First strip off everything before the last '/'. */
- filename = strrchr (entry->filename, '/');
- filename++;
+ if (strchr (global_needed->name, '/') != NULL)
+ return;
+ suffix = strstr (global_needed->name, ".so.");
+ if (suffix == NULL)
+ return;
+ suffix += sizeof ".so." - 1;
- needed_name = (char *) xmalloc (strlen (filename) + 1);
- strcpy (needed_name, filename);
- bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
- }
+ soname = bfd_elf_get_dt_soname (s->the_bfd);
+ if (soname == NULL)
+ soname = basename (s->filename);
- return true;
+ if (strncmp (soname, 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, soname);
}
-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${EMULATION_NAME}_check_ld_so_conf
- PARAMS ((const char *, int));
+/* This function is called for each possible name for a dynamic object
+ named by a DT_NEEDED entry. The FORCE parameter indicates whether
+ to skip the check for a conflicting version. */
static boolean
-gld${EMULATION_NAME}_check_ld_so_conf (name, force)
+gld${EMULATION_NAME}_try_needed (name, force)
const char *name;
int force;
{
- static boolean initialized;
- static char *ld_so_conf;
+ bfd *abfd;
+ const char *soname;
- if (! initialized)
+ abfd = bfd_openr (name, bfd_get_target (output_bfd));
+ if (abfd == NULL)
+ return false;
+ if (! bfd_check_format (abfd, bfd_object))
{
- FILE *f;
+ bfd_close (abfd);
+ return false;
+ }
+ if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
+ {
+ bfd_close (abfd);
+ return false;
+ }
- f = fopen ("/etc/ld.so.conf", FOPEN_RT);
- if (f != NULL)
- {
- char *b;
- size_t len, alloc;
- int c;
+ /* Check whether this object would include any conflicting library
+ versions. If FORCE is set, then we skip this check; we use this
+ the second time around, if we couldn't find any compatible
+ instance of the shared library. */
- len = 0;
- alloc = 100;
- b = (char *) xmalloc (alloc);
+ if (! force)
+ {
+ struct bfd_link_needed_list *needed;
- while ((c = getc (f)) != EOF)
+ if (! bfd_elf_get_bfd_needed_list (abfd, &needed))
+ einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);
+
+ if (needed != NULL)
+ {
+ global_vercheck_needed = needed;
+ global_vercheck_failed = false;
+ lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);
+ if (global_vercheck_failed)
{
- if (len + 1 >= alloc)
- {
- alloc *= 2;
- b = (char *) xrealloc (b, alloc);
- }
- if (c != ':'
- && c != ' '
- && c != '\t'
- && c != '\n'
- && c != ',')
- {
+ 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)
+ {
+ bfd_close (abfd);
+ return false;
+ }
+ }
+
+EOF
+ ;;
+esac
+cat >>e${EMULATION_NAME}.c <<EOF
+ }
+ }
+
+ /* We've found a dynamic object matching the DT_NEEDED entry. */
+
+ /* We have already checked that there is no other input file of the
+ same name. We must now check again that we are not including the
+ same file twice. We need to do this because on many systems
+ libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
+ reference libc.so.1. If we have already included libc.so, we
+ don't want to include libc.so.1 if they are the same file, and we
+ can only check that using stat. */
+
+ if (bfd_stat (abfd, &global_stat) != 0)
+ einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
+
+ /* First strip off everything before the last '/'. */
+ soname = basename (abfd->filename);
+
+ if (trace_file_tries)
+ info_msg (_("found %s at %s\n"), soname, name);
+
+ global_found = false;
+ lang_for_each_input_file (gld${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 we don't want the output file to have a
+ DT_NEEDED entry for this file. */
+ bfd_elf_set_dt_needed_name (abfd, "");
+
+ /* Previos basename call was clobbered in lang_for_each_input_file. */
+ soname = basename (abfd->filename);
+
+ /* Tell the ELF backend that the output file needs a DT_NEEDED
+ entry for this file if it is used to resolve the reference in
+ a regular object. */
+ bfd_elf_set_dt_needed_soname (abfd, soname);
+
+ /* 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;
+}
+
+
+/* Search for a needed file in a path. */
+
+static boolean
+gld${EMULATION_NAME}_search_needed (path, name, force)
+ const char *path;
+ const char *name;
+ int force;
+{
+ const char *s;
+ size_t len;
+
+ if (name[0] == '/')
+ return gld${EMULATION_NAME}_try_needed (name, force);
+
+ 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${EMULATION_NAME}_try_needed (filename, force))
+ return true;
+
+ free (filename);
+
+ if (*s == '\0')
+ break;
+ path = s + 1;
+ }
+
+ return false;
+}
+
+EOF
+if [ "x${host}" = "x${target}" ] ; then
+ case " ${EMULATION_LIBPATH} " in
+ *" ${EMULATION_NAME} "*)
+ case ${target} in
+ *-*-linux-gnu*)
+ cat >>e${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. */
+
+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;
}
}
EOF
- ;;
+ # Linux
+ ;;
+ esac
esac
fi
cat >>e${EMULATION_NAME}.c <<EOF
-/* These variables are required to pass information back and forth
- between after_open and check_needed and stat_needed and vercheck. */
+/* See if an input file matches a DT_NEEDED entry by name. */
-static struct bfd_link_needed_list *global_needed;
-static struct stat global_stat;
-static boolean global_found;
-static struct bfd_link_needed_list *global_vercheck_needed;
-static boolean global_vercheck_failed;
+static void
+gld${EMULATION_NAME}_check_needed (s)
+ lang_input_statement_type *s;
+{
+ if (global_found)
+ return;
+
+ if (s->filename != NULL)
+ {
+ const char *f;
+
+ if (strcmp (s->filename, global_needed->name) == 0)
+ {
+ global_found = true;
+ return;
+ }
+
+ if (s->search_dirs_flag)
+ {
+ f = strrchr (s->filename, '/');
+ if (f != NULL
+ && strcmp (f + 1, global_needed->name) == 0)
+ {
+ global_found = true;
+ return;
+ }
+ }
+ }
+
+ if (s->the_bfd != NULL)
+ {
+ const char *soname;
+
+ soname = bfd_elf_get_dt_soname (s->the_bfd);
+ if (soname != NULL
+ && strcmp (soname, global_needed->name) == 0)
+ {
+ global_found = true;
+ return;
+ }
+ }
+}
+
+EOF
+
+if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then
+cat >>e${EMULATION_NAME}.c <<EOF
/* This is called after all the input files have been opened. */
if (global_found)
continue;
+ if (trace_file_tries)
+ info_msg (_("%s needed by %B\n"), l->name, l->by);
+
/* We need to find this file and include the symbol table. We
want to search for the file in the same way that the dynamic
linker will search. That means that we want to use
rpath_link, rpath, then the environment variable
- LD_LIBRARY_PATH (native only), then the linker script
- LIB_SEARCH_DIRS. We do not search using the -L arguments.
+ LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
+ entries (native only), then the linker script LIB_SEARCH_DIRS.
+ We do not search using the -L arguments.
We search twice. The first time, we skip objects which may
introduce version mismatches. The second time, we force
their use. See gld${EMULATION_NAME}_vercheck comment. */
for (force = 0; force < 2; force++)
{
- const char *lib_path;
size_t len;
search_dirs_type *search;
+EOF
+if [ "x${host}" = "x${target}" ] ; then
+ case " ${EMULATION_LIBPATH} " in
+ *" ${EMULATION_NAME} "*)
+cat >>e${EMULATION_NAME}.c <<EOF
+ const char *lib_path;
+ struct bfd_link_needed_list *rp;
+ int found;
+EOF
+ ;;
+ esac
+fi
+cat >>e${EMULATION_NAME}.c <<EOF
if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
l->name, force))
break;
+EOF
+if [ "x${host}" = "x${target}" ] ; then
+ case " ${EMULATION_LIBPATH} " in
+ *" ${EMULATION_NAME} "*)
+cat >>e${EMULATION_NAME}.c <<EOF
if (gld${EMULATION_NAME}_search_needed (command_line.rpath,
l->name, force))
break;
force))
break;
}
-EOF
-if [ "x${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${EMULATION_NAME}_search_needed (lib_path, l->name, force))
break;
+
+ found = 0;
+ rp = bfd_elf_get_runpath_list (output_bfd, &link_info);
+ for (; !found && rp != NULL; rp = rp->next)
+ {
+ found = (rp->by == l->by
+ && gld${EMULATION_NAME}_search_needed (rp->name,
+ l->name,
+ force));
+ }
+ if (found)
+ break;
+
EOF
;;
esac
if [ "x${host}" = "x${target}" ] ; then
case " ${EMULATION_LIBPATH} " in
*" ${EMULATION_NAME} "*)
-cat >>e${EMULATION_NAME}.c <<EOF
+ case ${target} in
+ *-*-linux-gnu*)
+ cat >>e${EMULATION_NAME}.c <<EOF
if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force))
break;
EOF
+ # Linux
+ ;;
+ esac
;;
esac
fi
if (force < 2)
continue;
- einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
+ einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n",
l->name, l->by);
}
}
-/* Search for a needed file in a path. */
+EOF
+fi
-static boolean
-gld${EMULATION_NAME}_search_needed (path, name, force)
- const char *path;
- const char *name;
- int force;
-{
- const char *s;
- size_t len;
+cat >>e${EMULATION_NAME}.c <<EOF
- if (path == NULL || *path == '\0')
- return false;
- len = strlen (name);
- while (1)
- {
- char *filename, *sset;
-
- s = strchr (path, ':');
- if (s == NULL)
- s = path + strlen (path);
-
- filename = (char *) xmalloc (s - path + len + 2);
- if (s == path)
- sset = filename;
- else
- {
- memcpy (filename, path, s - path);
- filename[s - path] = '/';
- sset = filename + (s - path) + 1;
- }
- strcpy (sset, name);
-
- if (gld${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;
-}
-
-/* See if an input file matches a DT_NEEDED entry by name. */
+/* Look through an expression for an assignment statement. */
static void
-gld${EMULATION_NAME}_check_needed (s)
- lang_input_statement_type *s;
+gld${EMULATION_NAME}_find_exp_assignment (exp)
+ etree_type *exp;
{
- if (global_found)
- return;
-
- if (s->filename != NULL
- && strcmp (s->filename, global_needed->name) == 0)
- {
- global_found = true;
- return;
- }
+ struct bfd_link_hash_entry *h;
- if (s->the_bfd != NULL)
+ switch (exp->type.node_class)
{
- const char *soname;
+ case etree_provide:
+ h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
+ false, false, false);
+ if (h == NULL)
+ break;
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname != NULL
- && strcmp (soname, global_needed->name) == 0)
- {
- global_found = true;
- return;
- }
- }
-
- if (s->search_dirs_flag
- && s->filename != NULL
- && strchr (global_needed->name, '/') == NULL)
- {
- const char *f;
+ /* 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. */
- f = strrchr (s->filename, '/');
- if (f != NULL
- && strcmp (f + 1, global_needed->name) == 0)
+ /* Fall through. */
+ case etree_assign:
+ if (strcmp (exp->assign.dst, ".") != 0)
{
- global_found = true;
- return;
+ if (! (bfd_elf${ELFSIZE}_record_link_assignment
+ (output_bfd, &link_info, exp->assign.dst,
+ exp->type.node_class == etree_provide ? true : false)))
+ einfo ("%P%F: failed to record assignment to %s: %E\n",
+ exp->assign.dst);
}
- }
-}
-
-/* See if an input file matches a DT_NEEDED entry by running stat on
- the file. */
+ gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
+ break;
-static void
-gld${EMULATION_NAME}_stat_needed (s)
- lang_input_statement_type *s;
-{
- struct stat st;
- const char *suffix;
- const char *soname;
- const char *f;
+ case etree_binary:
+ gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
+ gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
+ break;
- if (global_found)
- return;
- if (s->the_bfd == NULL)
- return;
+ case etree_trinary:
+ gld${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;
- if (bfd_stat (s->the_bfd, &st) != 0)
- {
- einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
- return;
- }
+ case etree_unary:
+ gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
+ break;
- if (st.st_dev == global_stat.st_dev
- && st.st_ino == global_stat.st_ino)
- {
- global_found = true;
- return;
+ default:
+ break;
}
-
- /* 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. */
+/* 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}_vercheck (s)
- lang_input_statement_type *s;
+gld${EMULATION_NAME}_find_statement_assignment (s)
+ lang_statement_union_type *s;
{
- const char *soname, *f;
- struct bfd_link_needed_list *l;
-
- if (global_vercheck_failed)
- return;
- if (s->the_bfd == NULL
- || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
- return;
-
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname == NULL)
- soname = bfd_get_filename (s->the_bfd);
+ if (s->header.type == lang_assignment_statement_enum)
+ gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
+}
- f = strrchr (soname, '/');
- if (f != NULL)
- ++f;
- else
- f = soname;
+EOF
- for (l = global_vercheck_needed; l != NULL; l = l->next)
+if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then
+ if test x"${ELF_INTERPRETER_NAME+set}" = xset; then
+ ELF_INTERPRETER_SET_DEFAULT="
+ if (sinterp != NULL)
{
- 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;
- }
+ sinterp->contents = ${ELF_INTERPRETER_NAME};
+ sinterp->_raw_size = strlen (sinterp->contents) + 1;
}
-}
+
+"
+ else
+ ELF_INTERPRETER_SET_DEFAULT=
+ fi
+cat >>e${EMULATION_NAME}.c <<EOF
/* This is called after the sections have been attached to output
sections, but before any sizes or addresses have been set. */
rpath = (const char *) getenv ("LD_RUN_PATH");
if (! (bfd_elf${ELFSIZE}_size_dynamic_sections
(output_bfd, command_line.soname, rpath,
- command_line.export_dynamic, command_line.filter_shlib,
+ command_line.filter_shlib,
(const char * const *) command_line.auxiliary_filters,
&link_info, &sinterp, lang_elf_version_info)))
einfo ("%P%F: failed to set dynamic section sizes: %E\n");
-
+${ELF_INTERPRETER_SET_DEFAULT}
/* Let the user override the dynamic linker we are using. */
if (command_line.interpreter != NULL
&& sinterp != NULL)
if (is->just_syms_flag)
continue;
- s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning");
- if (s == NULL)
- 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;
+ }
+ }
+}
+
+EOF
+fi
+
+if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then
+cat >>e${EMULATION_NAME}.c <<EOF
+
+/* Try to open a dynamic archive. This is where we know that ELF
+ dynamic libraries have an extension of .so (or .sl on oddball systems
+ like hpux). */
+
+static boolean
+gld${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;
+
+ /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION
+ is defined, but it does not seem worth the headache to optimize
+ away those two bytes of space. */
+ string = (char *) xmalloc (strlen (search->name)
+ + strlen (filename)
+ + strlen (arch)
+#ifdef EXTRA_SHLIB_EXTENSION
+ + strlen (EXTRA_SHLIB_EXTENSION)
+#endif
+ + sizeof "/lib.so");
+
+ sprintf (string, "%s/lib%s%s.so", search->name, filename, arch);
+
+#ifdef EXTRA_SHLIB_EXTENSION
+ /* Try the .so extension first. If that fails build a new filename
+ using EXTRA_SHLIB_EXTENSION. */
+ if (! ldfile_try_open_bfd (string, entry))
+ sprintf (string, "%s/lib%s%s%s", search->name,
+ filename, arch, EXTRA_SHLIB_EXTENSION);
+#endif
+
+ 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)
+ {
+ ASSERT (entry->is_archive && entry->search_dirs_flag);
+
+ /* Rather than duplicating the logic above. Just use the
+ filename we recorded earlier. */
- 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);
+ filename = xstrdup (basename (entry->filename));
+ bfd_elf_set_dt_needed_name (entry->the_bfd, filename);
+ }
- /* Clobber the section size, so that we don't waste copying the
- warning into the output file. */
- s->_raw_size = 0;
- }
- }
+ return true;
}
-/* 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. */
+EOF
+fi
-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);
-}
+if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
+cat >>e${EMULATION_NAME}.c <<EOF
-/* Look through an expression for an assignment statement. */
+/* A variant of lang_output_section_find. Used by place_orphan. */
-static void
-gld${EMULATION_NAME}_find_exp_assignment (exp)
- etree_type *exp;
+static lang_output_section_statement_type *
+output_rel_find ()
{
- struct bfd_link_hash_entry *h;
+ lang_statement_union_type *u;
+ lang_output_section_statement_type *lookup;
- switch (exp->type.node_class)
+ for (u = lang_output_section_statement.head;
+ u != (lang_statement_union_type *) NULL;
+ u = lookup->next)
{
- 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)
+ lookup = &u->output_section_statement;
+ if (strncmp (".rel", lookup->name, 4) == 0
+ && lookup->bfd_section != NULL
+ && (lookup->bfd_section->flags & SEC_ALLOC) != 0)
{
- if (! (bfd_elf${ELFSIZE}_record_link_assignment
- (output_bfd, &link_info, exp->assign.dst,
- exp->type.node_class == etree_provide ? true : false)))
- einfo ("%P%F: failed to record assignment to %s: %E\n",
- exp->assign.dst);
+ return lookup;
}
- gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
- break;
+ }
+ return (lang_output_section_statement_type *) NULL;
+}
- case etree_binary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
- gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
- break;
+/* Find the last output section before given output statement.
+ Used by place_orphan. */
- case etree_trinary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
- break;
+static asection *
+output_prev_sec_find (os)
+ lang_output_section_statement_type *os;
+{
+ asection *s = (asection *) NULL;
+ lang_statement_union_type *u;
+ lang_output_section_statement_type *lookup;
- case etree_unary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
- break;
+ for (u = lang_output_section_statement.head;
+ u != (lang_statement_union_type *) NULL;
+ u = lookup->next)
+ {
+ lookup = &u->output_section_statement;
+ if (lookup == os)
+ return s;
- default:
- break;
+ if (lookup->bfd_section != NULL && lookup->bfd_section->owner != NULL)
+ s = lookup->bfd_section;
}
+
+ return NULL;
}
/* Place an orphan section. We use this to put random SHF_ALLOC
sections in the right segment. */
-static asection *hold_section;
-static lang_output_section_statement_type *hold_use;
-
-struct orphan_save
-{
+struct orphan_save {
lang_output_section_statement_type *os;
+ asection **section;
lang_statement_union_type **stmt;
};
-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;
-
-/*ARGSUSED*/
+
static boolean
gld${EMULATION_NAME}_place_orphan (file, s)
lang_input_statement_type *file;
asection *s;
{
+ static struct orphan_save hold_text;
+ static struct orphan_save hold_rodata;
+ static struct orphan_save hold_data;
+ static struct orphan_save hold_bss;
+ static struct orphan_save hold_rel;
+ static struct orphan_save hold_interp;
+ static struct orphan_save hold_sdata;
+ static int count = 1;
struct orphan_save *place;
- asection *snew, **pps;
lang_statement_list_type *old;
lang_statement_list_type add;
etree_type *address;
- const char *secname, *ps;
+ const char *secname;
const char *outsecname;
+ const char *ps = NULL;
lang_output_section_statement_type *os;
- /* Look through the script to see where to place this section. */
- hold_section = s;
- hold_use = NULL;
- lang_for_each_statement (gld${EMULATION_NAME}_place_section);
+ secname = bfd_get_section_name (s->owner, s);
- if (hold_use != NULL)
+ if (! config.unique_orphan_sections && ! unique_section_p (secname))
{
- /* We have already placed a section with this name. */
- wild_doit (&hold_use->children, s, hold_use, file);
- return true;
+ /* 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 already have an output section statement with this
+ name, and its bfd section, if any, has compatible flags. */
+ lang_add_section (&os->children, s, os, file);
+ return true;
+ }
}
- secname = bfd_get_section_name (s->owner, s);
+ 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. */
&& strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0
&& hold_text.os != NULL)
{
- wild_doit (&hold_text.os->children, s, hold_text.os, file);
+ lang_add_section (&hold_text.os->children, s, hold_text.os, file);
return true;
}
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;
+ {
+ if (s->output_section == NULL)
+ s->output_section = bfd_abs_section_ptr;
+ return true;
+ }
+
+ place = NULL;
+ if ((s->flags & SEC_ALLOC) == 0)
+ ;
else if ((s->flags & SEC_LOAD) != 0
- && strncmp (secname, ".note", 4) == 0
- && hold_interp.os != NULL)
+ && strncmp (secname, ".note", 5) == 0
+ && HAVE_SECTION (hold_interp, ".interp"))
place = &hold_interp;
else if ((s->flags & SEC_HAS_CONTENTS) == 0
- && hold_bss.os != NULL)
+ && HAVE_SECTION (hold_bss, ".bss"))
place = &hold_bss;
+ else if ((s->flags & SEC_SMALL_DATA) != 0
+ && HAVE_SECTION (hold_sdata, ".sdata"))
+ place = &hold_sdata;
else if ((s->flags & SEC_READONLY) == 0
- && hold_data.os != NULL)
+ && HAVE_SECTION (hold_data, ".data"))
place = &hold_data;
else if (strncmp (secname, ".rel", 4) == 0
- && hold_rel.os != NULL)
- place = &hold_rel;
- else if ((s->flags & SEC_CODE) == 0
- && (s->flags & SEC_READONLY) != 0
- && hold_rodata.os != NULL)
+ && (hold_rel.os != NULL
+ || (hold_rel.os = output_rel_find ()) != NULL))
+ {
+ if (! link_info.relocateable && link_info.combreloc)
+ {
+ if (strncmp (secname, ".rela", 5) == 0)
+ os = lang_output_section_find (".rela.dyn");
+ else
+ os = lang_output_section_find (".rel.dyn");
+
+ if (os != NULL
+ && os->bfd_section != NULL
+ && ((s->flags ^ os->bfd_section->flags)
+ & (SEC_LOAD | SEC_ALLOC)) == 0)
+ {
+ lang_add_section (&os->children, s, os, file);
+ return true;
+ }
+ }
+ place = &hold_rel;
+ }
+ else if ((s->flags & (SEC_CODE | SEC_READONLY)) == SEC_READONLY
+ && HAVE_SECTION (hold_rodata, ".rodata"))
place = &hold_rodata;
- else if ((s->flags & SEC_READONLY) != 0
+ else if ((s->flags & (SEC_CODE | SEC_READONLY)) == (SEC_CODE | SEC_READONLY)
&& 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. */
+ loadable or allocatable 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;
- }
-
- /* Create the section in the output file, and put it in the right
- place. This shuffling is to make the output file look neater. */
- snew = bfd_make_section (output_bfd, outsecname);
- if (snew == NULL)
- einfo ("%P%F: output format %s cannot represent section called %s\n",
- output_bfd->xvec->name, outsecname);
- if (place != NULL && place->os->bfd_section != NULL)
- {
- /* Unlink it first. */
- for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
- ;
- *pps = snew->next;
- snew->next = NULL;
- /* Now tack it on to the end of the "place->os" section list. */
- for (pps = &place->os->bfd_section; *pps; pps = &(*pps)->next)
- ;
- *pps = snew;
+ outsecname = bfd_get_unique_section_name (output_bfd,
+ outsecname,
+ &count);
+ if (outsecname == NULL)
+ einfo ("%F%P: place_orphan failed: %E\n");
}
- /* Start building a list of statements for this section. */
+ /* Start building a list of statements for this section.
+ First save the current statement pointer. */
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)
+ /* If we have found an appropriate place for the output section
+ statements for this orphan, add them to our own private list,
+ inserting them later into the global statement list. */
+ if (place != NULL)
{
- char *symname;
+ stat_ptr = &add;
+ lang_list_init (stat_ptr);
+ }
- symname = (char *) xmalloc (ps - outsecname + sizeof "__start_");
- sprintf (symname, "__start_%s", outsecname);
- lang_add_assignment (exp_assop ('=', symname,
- exp_unop (ALIGN_K,
- exp_intop ((bfd_vma) 1
- << s->alignment_power))));
+ if (config.build_constructors)
+ {
+ /* 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 (*ps) && *ps != '_')
+ break;
+ if (*ps == '\0')
+ {
+ 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)
else
address = NULL;
- lang_enter_output_section_statement (outsecname, address, 0,
- (bfd_vma) 0,
- (etree_type *) NULL,
- (etree_type *) NULL,
- (etree_type *) NULL);
+ os = lang_enter_output_section_statement (outsecname, address, 0,
+ (bfd_vma) 0,
+ (etree_type *) NULL,
+ (etree_type *) NULL,
+ (etree_type *) NULL);
- os = lang_output_section_statement_lookup (outsecname);
- wild_doit (&os->children, s, os, file);
+ lang_add_section (&os->children, s, os, file);
lang_leave_output_section_statement
- ((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL,
- "*default*");
- stat_ptr = &add;
+ ((bfd_vma) 0, "*default*",
+ (struct lang_output_section_phdr_list *) NULL, "*default*");
- if (*ps == '\0' && config.build_constructors)
+ if (config.build_constructors && *ps == '\0')
{
char *symname;
+ /* lang_leave_ouput_section_statement resets stat_ptr. Put
+ stat_ptr back where we want it. */
+ if (place != NULL)
+ stat_ptr = &add;
+
symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_");
sprintf (symname, "__stop_%s", outsecname);
lang_add_assignment (exp_assop ('=', symname,
exp_nameop (NAME, ".")));
}
+ /* Restore the global list pointer. */
+ stat_ptr = old;
+
if (place != NULL)
{
- if (! place->stmt)
+ asection *snew, **pps;
+
+ snew = os->bfd_section;
+
+ /* Shuffle the bfd section list to make the output file look
+ neater. This is really only cosmetic. */
+ if (place->section == NULL)
+ {
+ asection *bfd_section = place->os->bfd_section;
+
+ /* If the output statement hasn't been used to place
+ any input sections (and thus doesn't have an output
+ bfd_section), look for the closest prior output statement
+ having an output section. */
+ if (bfd_section == NULL)
+ bfd_section = output_prev_sec_find (place->os);
+
+ if (bfd_section != NULL && bfd_section != snew)
+ place->section = &bfd_section->next;
+ }
+
+ if (place->section != NULL)
{
- /* Put the new statement list right at the head. */
- *add.tail = place->os->header.next;
- place->os->header.next = add.head;
+ /* 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;
}
- else
+
+ /* Save the end of this list. Further ophans of this type will
+ follow the one we've just added. */
+ place->section = &snew->next;
+
+ /* The following is non-cosmetic. We try to put the output
+ statements in some sort of reasonable order here, because
+ they determine the final load addresses of the orphan
+ sections. In addition, placing output statements in the
+ wrong order may require extra segments. For instance,
+ given a typical situation of all read-only sections placed
+ in one segment and following that a segment containing all
+ the read-write sections, we wouldn't want to place an orphan
+ read/write section before or amongst the read-only ones. */
+ if (add.head != NULL)
{
- /* Put it after the last orphan statement we added. */
- *add.tail = *place->stmt;
- *place->stmt = add.head;
+ 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;
+ }
+
+ /* Fix the global list pointer if we happened to tack our
+ new list at the tail. */
+ if (*old->tail == add.head)
+ old->tail = add.tail;
+
+ /* Save the end of this list. */
+ place->stmt = add.tail;
}
- place->stmt = add.tail; /* Save the end of this list. */
}
- stat_ptr = old;
return true;
}
-static void
-gld${EMULATION_NAME}_place_section (s)
- lang_statement_union_type *s;
-{
- lang_output_section_statement_type *os;
-
- if (s->header.type != lang_output_section_statement_enum)
- return;
+EOF
+fi
- os = &s->output_section_statement;
-
- if (strcmp (os->name, hold_section->name) == 0
- && os->bfd_section != NULL
- && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC))
- == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC))))
- hold_use = os;
-
- if (strcmp (os->name, ".text") == 0)
- hold_text.os = os;
- else if (strcmp (os->name, ".rodata") == 0)
- hold_rodata.os = os;
- else if (strcmp (os->name, ".data") == 0)
- hold_data.os = os;
- else if (strcmp (os->name, ".bss") == 0)
- hold_bss.os = os;
- else if (hold_rel.os == NULL
- && os->bfd_section != NULL
- && (os->bfd_section->flags & SEC_ALLOC) != 0
- && strncmp (os->name, ".rel", 4) == 0)
- hold_rel.os = os;
- else if (strcmp (os->name, ".interp") == 0)
- hold_interp.os = os;
-}
+if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
+cat >>e${EMULATION_NAME}.c <<EOF
static char *
-gld${EMULATION_NAME}_get_script(isfile)
+gld${EMULATION_NAME}_get_script (isfile)
int *isfile;
EOF
sc="-f stringify.sed"
cat >>e${EMULATION_NAME}.c <<EOF
-{
+{
*isfile = 0;
if (link_info.relocateable == true && config.build_constructors == true)
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${EMULATION_NAME}.c
+if ! cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then
echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
-
+fi
if test -n "$GENERATE_SHLIB_SCRIPT" ; then
+echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c
echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c
fi
-
+echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xc >> 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
# Scripts read from the filesystem.
cat >>e${EMULATION_NAME}.c <<EOF
-{
+{
*isfile = 1;
if (link_info.relocateable == true && config.build_constructors == true)
else
return "ldscripts/${EMULATION_NAME}.x";
}
+
EOF
+fi
+fi
+
+if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then
+if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
+
+if test -n "$PARSE_AND_LIST_PROLOGUE" ; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ $PARSE_AND_LIST_PROLOGUE
+EOF
fi
-if test -n "$PARSE_AND_LIST_ARGS" ; then
cat >>e${EMULATION_NAME}.c <<EOF
-static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **));
-static void gld_${EMULATION_NAME}_list_options PARAMS ((FILE * file));
- $PARSE_AND_LIST_ARGS
+#include "getopt.h"
+
+#define OPTION_DISABLE_NEW_DTAGS (400)
+#define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1)
+#define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1)
+
+static struct option longopts[] =
+{
+EOF
+
+if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ /* getopt allows abbreviations, so we do this to stop it from
+ treating -d/-e as abbreviations for these options. */
+ {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
+ {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
+ {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
+ {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
+ {"Bgroup", no_argument, NULL, OPTION_GROUP},
+ {"Bgroup", no_argument, NULL, OPTION_GROUP},
+EOF
+fi
+
+if test -n "$PARSE_AND_LIST_LONGOPTS" ; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ $PARSE_AND_LIST_LONGOPTS
EOF
-else
+fi
+
+cat >>e${EMULATION_NAME}.c <<EOF
+ {NULL, no_argument, NULL, 0}
+};
+
+
+static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
+static int
+gld${EMULATION_NAME}_parse_args (argc, argv)
+ int argc;
+ char ** argv;
+{
+ int longind;
+ int optc;
+ static int prevoptind = -1;
+ int prevopterr = opterr;
+ int wanterror;
+
+ if (prevoptind != optind)
+ opterr = 0;
+
+ wanterror = opterr;
+ prevoptind = optind;
+
+ optc = getopt_long_only (argc, argv,
+ "-${PARSE_AND_LIST_SHORTOPTS}z:", longopts,
+ &longind);
+ opterr = prevopterr;
+
+ switch (optc)
+ {
+ default:
+ if (wanterror)
+ xexit (1);
+ optind = prevoptind;
+ return 0;
+
+EOF
+
+if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ case OPTION_DISABLE_NEW_DTAGS:
+ link_info.new_dtags = false;
+ break;
+
+ case OPTION_ENABLE_NEW_DTAGS:
+ link_info.new_dtags = true;
+ break;
+
+ case OPTION_GROUP:
+ link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
+ /* Groups must be self-contained. */
+ link_info.no_undefined = true;
+ break;
+
+ case 'z':
+ if (strcmp (optarg, "initfirst") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
+ else if (strcmp (optarg, "interpose") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE;
+ else if (strcmp (optarg, "loadfltr") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR;
+ else if (strcmp (optarg, "nodefaultlib") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB;
+ else if (strcmp (optarg, "nodelete") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_NODELETE;
+ else if (strcmp (optarg, "nodlopen") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN;
+ else if (strcmp (optarg, "nodump") == 0)
+ link_info.flags_1 |= (bfd_vma) DF_1_NODUMP;
+ else if (strcmp (optarg, "now") == 0)
+ {
+ link_info.flags |= (bfd_vma) DF_BIND_NOW;
+ link_info.flags_1 |= (bfd_vma) DF_1_NOW;
+ }
+ else if (strcmp (optarg, "origin") == 0)
+ {
+ link_info.flags |= (bfd_vma) DF_ORIGIN;
+ link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
+ }
+ else if (strcmp (optarg, "defs") == 0)
+ link_info.no_undefined = true;
+ else if (strcmp (optarg, "combreloc") == 0)
+ link_info.combreloc = true;
+ else if (strcmp (optarg, "nocombreloc") == 0)
+ link_info.combreloc = false;
+ /* What about the other Solaris -z options? FIXME. */
+ break;
+EOF
+fi
+
+if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ $PARSE_AND_LIST_ARGS_CASES
+EOF
+fi
+
+cat >>e${EMULATION_NAME}.c <<EOF
+ }
+
+ return 1;
+}
+
+EOF
+fi
+
+if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
+cat >>e${EMULATION_NAME}.c <<EOF
+
+static void gld${EMULATION_NAME}_list_options PARAMS ((FILE * file));
+
+static void
+gld${EMULATION_NAME}_list_options (file)
+ FILE * file;
+{
+EOF
+
+if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ fprintf (file, _(" -Bgroup\t\tSelects group name lookup rules for DSO\n"));
+ fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n"));
+ fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n"));
+ fprintf (file, _(" -z defs\t\tDisallows undefined symbols\n"));
+ fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
+ fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but executable\n"));
+ fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n"));
+ fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n"));
+ fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n"));
+ fprintf (file, _(" -z nodlopen\t\tMark DSO not available to dlopen\n"));
+ fprintf (file, _(" -z nodump\t\tMark DSO not available to dldump\n"));
+ fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n"));
+ fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n"));
+ fprintf (file, _("\t\t\t at runtime\n"));
+ fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n"));
+EOF
+fi
+
+if test -n "$PARSE_AND_LIST_OPTIONS" ; then
cat >>e${EMULATION_NAME}.c <<EOF
-#define gld_${EMULATION_NAME}_parse_args NULL
-#define gld_${EMULATION_NAME}_list_options NULL
+ $PARSE_AND_LIST_OPTIONS
+EOF
+fi
+
+cat >>e${EMULATION_NAME}.c <<EOF
+}
EOF
+if test -n "$PARSE_AND_LIST_EPILOGUE" ; then
+cat >>e${EMULATION_NAME}.c <<EOF
+ $PARSE_AND_LIST_EPILOGUE
+EOF
+fi
+fi
+else
+if test x"$LDEMUL_PARSE_ARGS" != xgld"$EMULATION_NAME"_parse_args; then
+cat >>e${EMULATION_NAME}.c <<EOF
+#define gld${EMULATION_NAME}_parse_args NULL
+EOF
+fi
+if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then
+cat >>e${EMULATION_NAME}.c <<EOF
+#define gld${EMULATION_NAME}_list_options NULL
+EOF
+fi
fi
cat >>e${EMULATION_NAME}.c <<EOF
-struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
+struct ld_emulation_xfer_struct ld_${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,
+ ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
+ ${LDEMUL_SYSLIB-syslib_default},
+ ${LDEMUL_HLL-hll_default},
+ ${LDEMUL_AFTER_PARSE-after_parse_default},
+ ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open},
+ ${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
+ ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
+ ${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
+ ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation},
+ ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
"${EMULATION_NAME}",
"${OUTPUT_FORMAT}",
- NULL, /* 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 */
+ ${LDEMUL_FINISH-NULL},
+ ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
+ ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive},
+ ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
+ ${LDEMUL_SET_SYMBOLS-NULL},
+ ${LDEMUL_PARSE_ARGS-gld${EMULATION_NAME}_parse_args},
+ ${LDEMUL_UNRECOGNIZED_FILE-NULL},
+ ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options},
+ ${LDEMUL_RECOGNIZED_FILE-NULL},
+ ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
};
EOF
projects / deliverable / binutils-gdb.git / blobdiff