]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blobdiff - ld/emultempl/linux.em
Emit a warning when -z relro is unsupported
[thirdparty/binutils-gdb.git] / ld / emultempl / linux.em
index 888a3ddc61c6c9e796673522e299e1dc7a0fbb34..14446109eaef0f60301566c68f760a2e82734967 100644 (file)
@@ -1,35 +1,41 @@
 # This shell script emits a C file. -*- C -*-
 # It does some substitutions.
-cat >e${EMULATION_NAME}.c <<EOF
+if [ -z "$MACHINE" ]; then
+  OUTPUT_ARCH=${ARCH}
+else
+  OUTPUT_ARCH=${ARCH}:${MACHINE}
+fi
+fragment <<EOF
 /* This file is is generated by a shell script.  DO NOT EDIT! */
 
 /* Linux a.out emulation code for ${EMULATION_NAME}
-   Copyright 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000
-   Free Software Foundation, Inc.
+   Copyright (C) 1991-2020 Free Software Foundation, Inc.
    Written by Steve Chamberlain <sac@cygnus.com>
    Linux support by Eric Youngdale <ericy@cais.cais.com>
 
-This file is part of GLD, the Gnu Linker.
+   This file is part of the GNU Binutils.
 
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
 
 #define TARGET_IS_${EMULATION_NAME}
 
-#include "bfd.h"
 #include "sysdep.h"
+#include "bfd.h"
 #include "bfdlink.h"
+#include "ctf-api.h"
 
 #include "ld.h"
 #include "ldmain.h"
@@ -39,37 +45,33 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #include "ldfile.h"
 #include "ldemul.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${EMULATION_NAME}_find_address_statement
-  PARAMS ((lang_statement_union_type *));
-static void gld${EMULATION_NAME}_create_output_section_statements
-  PARAMS ((void));
-static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
-static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
-
 static void
-gld${EMULATION_NAME}_before_parse()
+gld${EMULATION_NAME}_before_parse (void)
 {
-  ldfile_output_architecture = bfd_arch_${ARCH};
-  config.dynamic_link = true;
-  config.has_shared = true;
+  ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
+  input_flags.dynamic = TRUE;
+  config.has_shared = TRUE;
+  link_info.check_relocs_after_open_input = TRUE;
+EOF
+if test -n "$COMMONPAGESIZE"; then
+fragment <<EOF
+  link_info.relro = DEFAULT_LD_Z_RELRO;
+EOF
+fi
+fragment <<EOF
 }
 
 /* Try to open a dynamic archive.  This is where we know that Linux
    dynamic libraries have an extension of .sa.  */
 
-static boolean
-gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
-     const char *arch;
-     search_dirs_type *search;
-     lang_input_statement_type *entry;
+static bfd_boolean
+gld${EMULATION_NAME}_open_dynamic_archive
+  (const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
 {
   char *string;
 
-  if (! entry->is_archive)
-    return false;
+  if (! entry->flags.maybe_archive || entry->flags.full_name_provided)
+    return FALSE;
 
   string = (char *) xmalloc (strlen (search->name)
                             + strlen (entry->filename)
@@ -81,12 +83,12 @@ gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
   if (! ldfile_try_open_bfd (string, entry))
     {
       free (string);
-      return false;
+      return FALSE;
     }
 
   entry->filename = string;
 
-  return true;
+  return TRUE;
 }
 
 /* This is called by the create_output_section_statements routine via
@@ -97,8 +99,7 @@ gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
    Linux tools.  */
 
 static void
-gld${EMULATION_NAME}_find_address_statement (s)
-     lang_statement_union_type *s;
+gld${EMULATION_NAME}_find_address_statement (lang_statement_union_type *s)
 {
   if (s->header.type == lang_address_statement_enum
       && strcmp (s->address_statement.section_name, ".text") == 0)
@@ -111,7 +112,7 @@ gld${EMULATION_NAME}_find_address_statement (s)
 /* This is called before opening the input BFD's.  */
 
 static void
-gld${EMULATION_NAME}_create_output_section_statements ()
+gld${EMULATION_NAME}_create_output_section_statements (void)
 {
   lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
 }
@@ -120,57 +121,59 @@ gld${EMULATION_NAME}_create_output_section_statements ()
    sections, but before any sizes or addresses have been set.  */
 
 static void
-gld${EMULATION_NAME}_before_allocation ()
+gld${EMULATION_NAME}_before_allocation (void)
 {
-  if (link_info.relocateable)
+  if (bfd_link_relocatable (&link_info))
     return;
 
   /* Let the backend work out the sizes of any sections required by
      dynamic linking.  */
-  if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info))
-    einfo ("%P%F: failed to set dynamic section sizes: %E\n");
+  if (! bfd_${EMULATION_NAME}_size_dynamic_sections (link_info.output_bfd,
+                                                    &link_info))
+    einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
+
+  before_allocation_default ();
 }
 
 static char *
-gld${EMULATION_NAME}_get_script(isfile)
-     int *isfile;
+gld${EMULATION_NAME}_get_script (int *isfile)
 EOF
 
-if test -n "$COMPILE_IN"
+if test x"$COMPILE_IN" = xyes
 then
 # Scripts compiled in.
 
 # sed commands to quote an ld script as a C string.
 sc="-f stringify.sed"
 
-cat >>e${EMULATION_NAME}.c <<EOF
-{                           
+fragment <<EOF
+{
   *isfile = 0;
 
-  if (link_info.relocateable == true && config.build_constructors == true)
+  if (bfd_link_relocatable (&link_info) && config.build_constructors)
     return
 EOF
-sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
-echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
-sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
-echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
-sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
-echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
-sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
-echo '  ; else return'                                     >> e${EMULATION_NAME}.c
-sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
-echo '; }'                                                 >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
+echo '  ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
+echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
+echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
+echo '  ; else return'                                 >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
+echo '; }'                                             >> e${EMULATION_NAME}.c
 
 else
 # Scripts read from the filesystem.
 
-cat >>e${EMULATION_NAME}.c <<EOF
-{                           
+fragment <<EOF
+{
   *isfile = 1;
 
-  if (link_info.relocateable == true && config.build_constructors == true)
+  if (bfd_link_relocatable (&link_info) && config.build_constructors)
     return "ldscripts/${EMULATION_NAME}.xu";
-  else if (link_info.relocateable == true)
+  else if (bfd_link_relocatable (&link_info))
     return "ldscripts/${EMULATION_NAME}.xr";
   else if (!config.text_read_only)
     return "ldscripts/${EMULATION_NAME}.xbn";
@@ -183,15 +186,17 @@ EOF
 
 fi
 
-cat >>e${EMULATION_NAME}.c <<EOF
+fragment <<EOF
 
-struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 
+struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 {
   gld${EMULATION_NAME}_before_parse,
   syslib_default,
   hll_default,
   after_parse_default,
   after_open_default,
+  after_check_relocs_default,
+  before_place_orphans_default,
   after_allocation_default,
   set_output_arch_default,
   ldemul_default_target,
@@ -199,15 +204,22 @@ struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
   gld${EMULATION_NAME}_get_script,
   "${EMULATION_NAME}",
   "${OUTPUT_FORMAT}",
-  NULL,        /* finish */
+  finish_default,
   gld${EMULATION_NAME}_create_output_section_statements,
   gld${EMULATION_NAME}_open_dynamic_archive,
   NULL,        /* place orphan */
   NULL,        /* set symbols */
   NULL,        /* parse args */
+  NULL,        /* add_options */
+  NULL,        /* handle_option */
   NULL,        /* unrecognized file */
   NULL,        /* list options */
   NULL,        /* recognized file */
-  NULL         /* find_potential_libraries */
+  NULL,        /* find_potential_libraries */
+  NULL,        /* new_vers_pattern */
+  NULL,        /* extra_map_file_text */
+  ${LDEMUL_EMIT_CTF_EARLY-NULL},
+  ${LDEMUL_EXAMINE_STRTAB_FOR_CTF-NULL},
+  ${LDEMUL_PRINT_SYMBOL-NULL}
 };
 EOF