#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${EMULATION_NAME}_vercheck
PARAMS ((lang_input_statement_type *));
static void gld${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 boolean gld${EMULATION_NAME}_place_orphan
PARAMS ((lang_input_statement_type *, asection *));
-static lang_output_section_statement_type *output_rel_find PARAMS ((void));
static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
static void
config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
}
-/* Try to open a dynamic archive. This is where we know that ELF
- dynamic libraries have an extension of .so (or .sl on oddball systems
- like hpux). */
-
-static boolean
-gld${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)
- {
- char *needed_name;
-
- ASSERT (entry->is_archive && entry->search_dirs_flag);
-
- /* Rather than duplicating the logic above. Just use the
- filename we recorded earlier.
-
- First strip off everything before the last '/'. */
- filename = strrchr (entry->filename, '/');
- filename++;
-
- needed_name = (char *) xmalloc (strlen (filename) + 1);
- strcpy (needed_name, filename);
- bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
- }
-
- return true;
-}
-
-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_vercheck_needed;
static boolean global_vercheck_failed;
-/* This is called after all the input files have been opened. */
-
-static void
-gld${EMULATION_NAME}_after_open ()
-{
- struct bfd_link_needed_list *needed, *l;
-
- /* We only need to worry about this when doing a final link. */
- if (link_info.relocateable || link_info.shared)
- return;
- /* Get the list of files which appear in DT_NEEDED entries in
- dynamic objects included in the link (often there will be none).
- For each such file, we want to track down the corresponding
- library, and include the symbol table in the link. This is what
- the runtime dynamic linker will do. Tracking the files down here
- permits one dynamic object to include another without requiring
- special action by the person doing the link. Note that the
- needed list can actually grow while we are stepping through this
- loop. */
- needed = bfd_elf_get_needed_list (output_bfd, &link_info);
- for (l = needed; l != NULL; l = l->next)
- {
- struct bfd_link_needed_list *ll;
- int force;
-
- /* If we've already seen this file, skip it. */
- for (ll = needed; ll != l; ll = ll->next)
- if (strcmp (ll->name, l->name) == 0)
- break;
- if (ll != l)
- continue;
+/* On Linux, it's possible to have different versions of the same
+ shared library linked against different versions of libc. The
+ dynamic linker somehow tags which libc version to use in
+ /etc/ld.so.cache, and, based on the libc that it sees in the
+ executable, chooses which version of the shared library to use.
- /* See if this file was included in the link explicitly. */
- global_needed = l;
- global_found = false;
- lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
- if (global_found)
- continue;
+ We 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.
- /* 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.
+ 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. */
- We search twice. The first time, we skip objects which may
- introduce version mismatches. The second time, we force
- their use. See gld${EMULATION_NAME}_vercheck comment. */
- for (force = 0; force < 2; force++)
- {
- const char *lib_path;
- size_t len;
- search_dirs_type *search;
+static void
+gld${EMULATION_NAME}_vercheck (s)
+ lang_input_statement_type *s;
+{
+ const char *soname, *f;
+ struct bfd_link_needed_list *l;
- 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 (global_vercheck_failed)
+ return;
+ if (s->the_bfd == NULL
+ || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
+ return;
- 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
+ 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 (force < 2)
+ if (strchr (l->name, '/') != NULL)
continue;
- einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
- l->name, l->by);
+ 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;
+ }
}
}
-/* Search for a needed file in a path. */
-static boolean
-gld${EMULATION_NAME}_search_needed (path, name, force)
- const char *path;
- const char *name;
- int force;
+/* See if an input file matches a DT_NEEDED entry by running stat on
+ the file. */
+
+static void
+gld${EMULATION_NAME}_stat_needed (s)
+ lang_input_statement_type *s;
{
- const char *s;
- size_t len;
+ struct stat st;
+ const char *suffix;
+ const char *soname;
+ const char *f;
- if (path == NULL || *path == '\0')
- return false;
- len = strlen (name);
- while (1)
+ if (global_found)
+ return;
+ if (s->the_bfd == NULL)
+ return;
+
+ if (bfd_stat (s->the_bfd, &st) != 0)
{
- char *filename, *sset;
+ einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);
+ return;
+ }
- s = strchr (path, ':');
- if (s == NULL)
- s = path + strlen (path);
+ if (st.st_dev == global_stat.st_dev
+ && st.st_ino == global_stat.st_ino)
+ {
+ global_found = true;
+ return;
+ }
- 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);
+ /* 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 (gld${EMULATION_NAME}_try_needed (filename, force))
- return true;
+ if (strchr (global_needed->name, '/') != NULL)
+ return;
+ suffix = strstr (global_needed->name, ".so.");
+ if (suffix == NULL)
+ return;
+ suffix += sizeof ".so." - 1;
- free (filename);
+ soname = bfd_elf_get_dt_soname (s->the_bfd);
+ if (soname == NULL)
+ soname = s->filename;
- if (*s == '\0')
- break;
- path = s + 1;
- }
+ f = strrchr (soname, '/');
+ if (f != NULL)
+ ++f;
+ else
+ f = soname;
- return false;
+ if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0)
+ einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",
+ global_needed->name, global_needed->by, f);
}
+
/* This function is called for each possible name for a dynamic object
named by a DT_NEEDED entry. The FORCE parameter indicates whether
to skip the check for a conflicting version. */
/* We've found a dynamic object matching the DT_NEEDED entry. */
- /* We have already checked that there is no other input file of the
- same name. We must now check again that we are not including the
- same file twice. We need to do this because on many systems
- libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
- reference libc.so.1. If we have already included libc.so, we
- don't want to include libc.so.1 if they are the same file, and we
- can only check that using stat. */
+ /* We have already checked that there is no other input file of the
+ same name. We must now check again that we are not including the
+ same file twice. We need to do this because on many systems
+ libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will
+ reference libc.so.1. If we have already included libc.so, we
+ don't want to include libc.so.1 if they are the same file, and we
+ can only check that using stat. */
+
+ if (bfd_stat (abfd, &global_stat) != 0)
+ einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);
+ global_found = false;
+ lang_for_each_input_file (gld${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, "");
+
+ /* First strip off everything before the last '/'. */
+ name = strrchr (abfd->filename, '/');
+ if (name)
+ name++;
+ else
+ name = 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, name);
+
+ /* 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${EMULATION_NAME}_search_needed (path, name, force)
+ const char *path;
+ const char *name;
+ int force;
+{
+ const char *s;
+ size_t len;
+
+ if (path == NULL || *path == '\0')
+ return false;
+ len = strlen (name);
+ while (1)
+ {
+ char *filename, *sset;
+
+ s = strchr (path, ':');
+ if (s == NULL)
+ s = path + strlen (path);
+
+ filename = (char *) xmalloc (s - path + len + 2);
+ if (s == path)
+ sset = filename;
+ else
+ {
+ memcpy (filename, path, s - path);
+ filename[s - path] = '/';
+ sset = filename + (s - path) + 1;
+ }
+ strcpy (sset, name);
+
+ if (gld${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
+ *" ${EMULATION_NAME} "*)
+cat >>e${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 (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${EMULATION_NAME}_stat_needed);
- if (global_found)
- {
- /* Return true to indicate that we found the file, even though
- we aren't going to do anything with it. */
- return true;
- }
+ if (len > 0)
+ b[len] = '\0';
+ else
+ {
+ free (b);
+ b = NULL;
+ }
- /* Tell the ELF backend that don't want the output file to have a
- DT_NEEDED entry for this file. */
- bfd_elf_set_dt_needed_name (abfd, "");
+ fclose (f);
- /* First strip off everything before the last '/'. */
- name = strrchr (abfd->filename, '/');
- if (name)
- name++;
- else
- name = abfd->filename;
+ ld_so_conf = b;
+ }
- /* Tell the ELF backend that the output file needs a DT_NEEDED
- entry for this file if it is used to resolve the reference in
- a regular object. */
- bfd_elf_set_dt_needed_soname (abfd, name);
+ initialized = true;
+ }
- /* Add this file into the symbol table. */
- if (! bfd_link_add_symbols (abfd, &link_info))
- einfo ("%F%B: could not read symbols: %E\n", abfd);
+ if (ld_so_conf == NULL)
+ return false;
- return true;
+ return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force);
}
+EOF
+ ;;
+ esac
+fi
+cat >>e${EMULATION_NAME}.c <<EOF
+
/* See if an input file matches a DT_NEEDED entry by name. */
static void
}
}
-/* See if an input file matches a DT_NEEDED entry by running stat on
- the file. */
+
+/* This is called after all the input files have been opened. */
static void
-gld${EMULATION_NAME}_stat_needed (s)
- lang_input_statement_type *s;
+gld${EMULATION_NAME}_after_open ()
{
- struct stat st;
- const char *suffix;
- const char *soname;
- const char *f;
+ struct bfd_link_needed_list *needed, *l;
- if (global_found)
- return;
- if (s->the_bfd == NULL)
+ /* We only need to worry about this when doing a final link. */
+ if (link_info.relocateable || link_info.shared)
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)
+ /* 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)
{
- 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;
+ struct bfd_link_needed_list *ll;
+ int force;
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname == NULL)
- soname = s->filename;
+ /* 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;
- f = strrchr (soname, '/');
- if (f != NULL)
- ++f;
- else
- f = soname;
+ /* 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;
- 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);
-}
+ /* 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.
-/* 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 search twice. The first time, we skip objects which may
+ introduce version mismatches. The second time, we force
+ their use. See gld${EMULATION_NAME}_vercheck comment. */
+ for (force = 0; force < 2; force++)
+ {
+ const char *lib_path;
+ size_t len;
+ search_dirs_type *search;
- We try to do a similar check here by checking whether this shared
- library needs any other shared libraries which may conflict with
- libraries we have already included in the link. If it does, we
- skip it, and try to find another shared library farther on down the
- link path.
+ if (gld${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;
- 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. */
+ 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
+ }
-static void
-gld${EMULATION_NAME}_vercheck (s)
- lang_input_statement_type *s;
-{
- const char *soname, *f;
- struct bfd_link_needed_list *l;
+ if (force < 2)
+ continue;
- if (global_vercheck_failed)
- return;
- if (s->the_bfd == NULL
- || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)
- return;
+ einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n",
+ l->name, l->by);
+ }
+}
- soname = bfd_elf_get_dt_soname (s->the_bfd);
- if (soname == NULL)
- soname = bfd_get_filename (s->the_bfd);
- f = strrchr (soname, '/');
- if (f != NULL)
- ++f;
- else
- f = soname;
+/* Look through an expression for an assignment statement. */
- for (l = global_vercheck_needed; l != NULL; l = l->next)
+static void
+gld${EMULATION_NAME}_find_exp_assignment (exp)
+ etree_type *exp;
+{
+ struct bfd_link_hash_entry *h;
+
+ switch (exp->type.node_class)
{
- const char *suffix;
+ case etree_provide:
+ h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
+ false, false, false);
+ if (h == NULL)
+ break;
- if (strcmp (f, l->name) == 0)
+ /* 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)
{
- /* Probably can't happen, but it's an easy check. */
- continue;
+ 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;
- if (strchr (l->name, '/') != NULL)
- continue;
+ case etree_binary:
+ gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
+ gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
+ break;
- suffix = strstr (l->name, ".so.");
- if (suffix == NULL)
- continue;
+ case etree_trinary:
+ gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
+ gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
+ gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
+ break;
- suffix += sizeof ".so." - 1;
+ case etree_unary:
+ gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
+ break;
- 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;
- }
+ 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. */
}
}
-/* 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${EMULATION_NAME}_find_statement_assignment (s)
- lang_statement_union_type *s;
+/* Try to open a dynamic archive. This is where we know that ELF
+ dynamic libraries have an extension of .so (or .sl on oddball systems
+ like hpux). */
+
+static boolean
+gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
+ const char *arch;
+ search_dirs_type *search;
+ lang_input_statement_type *entry;
{
- if (s->header.type == lang_assignment_statement_enum)
- gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
-}
+ const char *filename;
+ char *string;
-/* Look through an expression for an assignment statement. */
+ if (! entry->is_archive)
+ return false;
-static void
-gld${EMULATION_NAME}_find_exp_assignment (exp)
- etree_type *exp;
-{
- struct bfd_link_hash_entry *h;
+ filename = entry->filename;
- switch (exp->type.node_class)
+ /* 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))
{
- case etree_provide:
- h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
- false, false, false);
- if (h == NULL)
- break;
+ free (string);
+ return false;
+ }
- /* 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. */
+ entry->filename = string;
- /* 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;
+ /* 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.
- case etree_binary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
- gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
- break;
+ 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;
- case etree_trinary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
- gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
- break;
+ ASSERT (entry->is_archive && entry->search_dirs_flag);
- case etree_unary:
- gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
- break;
+ /* Rather than duplicating the logic above. Just use the
+ filename we recorded earlier.
- default:
- break;
+ First strip off everything before the last '/'. */
+ filename = strrchr (entry->filename, '/');
+ filename++;
+
+ needed_name = (char *) xmalloc (strlen (filename) + 1);
+ strcpy (needed_name, filename);
+ bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name);
+ }
+
+ 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;
}
+
/* Place an orphan section. We use this to put random SHF_ALLOC
sections in the right segment. */
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;
-}
static char *
gld${EMULATION_NAME}_get_script(isfile)
{NULL, no_argument, NULL, 0}
};
+
static int
gld_${EMULATION_NAME}_parse_args (argc, argv)
int argc;
return 1;
}
+
static void
gld_${EMULATION_NAME}_list_options (file)
FILE * file;
projects / deliverable / binutils-gdb.git / blobdiff