Subversion Repositories openrisc

# This shell script emits a C file. -*- C -*-

#   Copyright 2006, 2007, 2008 Free Software Foundation, Inc.

#

# This file is part of the GNU Binutils.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

# MA 02110-1301, USA.

#

# This file is sourced from elf32.em, and defines extra spu specific

# features.

#

fragment <

#include "ldctor.h"

#include "elf32-spu.h"

/* Non-zero if no overlay processing should be done.  */

static int no_overlays = 0;

/* Non-zero if we want stubs on all calls out of overlay regions.  */

static int non_overlay_stubs = 0;

/* Whether to emit symbols for stubs.  */

static int emit_stub_syms = 0;

/* Non-zero to perform stack space analysis.  */

static int stack_analysis = 0;

/* Whether to emit symbols with stack requirements for each function.  */

static int emit_stack_syms = 0;

/* Range of valid addresses for loadable sections.  */

static bfd_vma local_store_lo = 0;

static bfd_vma local_store_hi = 0x3ffff;

/* Control --auto-overlay feature.  */

static int auto_overlay = 0;

static char *auto_overlay_file = 0;

static unsigned int auto_overlay_fixed = 0;

static unsigned int auto_overlay_reserved = 0;

int my_argc;

char **my_argv;

static const char ovl_mgr[] = {

EOF

../binutils/bin2c < ${srcdir}/emultempl/spu_ovl.o >> e${EMULATION_NAME}.c

fragment <

};

static const struct _ovl_stream ovl_mgr_stream = {

  ovl_mgr,

  ovl_mgr + sizeof (ovl_mgr)

};

static int

is_spu_target (void)

{

  extern const bfd_target bfd_elf32_spu_vec;

  return link_info.output_bfd->xvec == &bfd_elf32_spu_vec;

}

/* Create our note section.  */

static void

spu_after_open (void)

{

  if (is_spu_target ()

      && !link_info.relocatable

      && link_info.input_bfds != NULL

      && !spu_elf_create_sections (&link_info,

                                   stack_analysis, emit_stack_syms))

    einfo ("%X%P: can not create note section: %E\n");

  gld${EMULATION_NAME}_after_open ();

}

/* If O is NULL, add section S at the end of output section OUTPUT_NAME.

   If O is not NULL, add section S at the beginning of output section O.

   Really, we should be duplicating ldlang.c map_input_to_output_sections

   logic here, ie. using the linker script to find where the section

   goes.  That's rather a lot of code, and we don't want to run

   map_input_to_output_sections again because most sections are already

   mapped.  So cheat, and put the section in a fixed place, ignoring any

   attempt via a linker script to put .stub, .ovtab, and built-in

   overlay manager code somewhere else.  */

static void

spu_place_special_section (asection *s, asection *o, const char *output_name)

{

  lang_output_section_statement_type *os;

  os = lang_output_section_find (o != NULL ? o->name : output_name);

  if (os == NULL)

    {

      const char *save = s->name;

      s->name = output_name;

      gld${EMULATION_NAME}_place_orphan (s);

      s->name = save;

    }

  else if (o != NULL && os->children.head != NULL)

    {

      lang_statement_list_type add;

      lang_list_init (&add);

      lang_add_section (&add, s, os);

      *add.tail = os->children.head;

      os->children.head = add.head;

    }

  else

    lang_add_section (&os->children, s, os);

  s->output_section->size += s->size;

}

/* Load built-in overlay manager, and tweak overlay section alignment.  */

static void

spu_elf_load_ovl_mgr (void)

{

  lang_output_section_statement_type *os;

  struct elf_link_hash_entry *h;

  h = elf_link_hash_lookup (elf_hash_table (&link_info),

                            "__ovly_load", FALSE, FALSE, FALSE);

  if (h != NULL

      && (h->root.type == bfd_link_hash_defined

          || h->root.type == bfd_link_hash_defweak)

      && h->def_regular)

    {

      /* User supplied __ovly_load.  */

    }

  else if (ovl_mgr_stream.start == ovl_mgr_stream.end)

    einfo ("%F%P: no built-in overlay manager\n");

  else

    {

      lang_input_statement_type *ovl_is;

      ovl_is = lang_add_input_file ("builtin ovl_mgr",

                                    lang_input_file_is_file_enum,

                                    NULL);

      if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream))

        einfo ("%X%P: can not open built-in overlay manager: %E\n");

      else

        {

          asection *in;

          if (!load_symbols (ovl_is, NULL))

            einfo ("%X%P: can not load built-in overlay manager: %E\n");

          /* Map overlay manager sections to output sections.  */

          for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next)

            if ((in->flags & (SEC_ALLOC | SEC_LOAD))

                == (SEC_ALLOC | SEC_LOAD))

              spu_place_special_section (in, NULL, ".text");

        }

    }

  /* Ensure alignment of overlay sections is sufficient.  */

  for (os = &lang_output_section_statement.head->output_section_statement;

       os != NULL;

       os = os->next)

    if (os->bfd_section != NULL

        && spu_elf_section_data (os->bfd_section) != NULL

        && spu_elf_section_data (os->bfd_section)->u.o.ovl_index != 0)

      {

        if (os->bfd_section->alignment_power < 4)

          os->bfd_section->alignment_power = 4;

        /* Also ensure size rounds up.  */

        os->block_value = 16;

      }

}

/* Go find if we need to do anything special for overlays.  */

static void

spu_before_allocation (void)

{

  if (is_spu_target ()

      && !link_info.relocatable

      && !no_overlays)

    {

      /* Size the sections.  This is premature, but we need to know the

         rough layout so that overlays can be found.  */

      expld.phase = lang_mark_phase_enum;

      expld.dataseg.phase = exp_dataseg_none;

      one_lang_size_sections_pass (NULL, TRUE);

      /* Find overlays by inspecting section vmas.  */

      if (spu_elf_find_overlays (&link_info))

        {

          int ret;

          if (auto_overlay != 0)

            {

              einfo ("%P: --auto-overlay ignored with user overlay script\n");

              auto_overlay = 0;

            }

          ret = spu_elf_size_stubs (&link_info,

                                    spu_place_special_section,

                                    non_overlay_stubs);

          if (ret == 0)

            einfo ("%X%P: can not size overlay stubs: %E\n");

          else if (ret == 2)

            spu_elf_load_ovl_mgr ();

        }

      /* We must not cache anything from the preliminary sizing.  */

      lang_reset_memory_regions ();

    }

  gld${EMULATION_NAME}_before_allocation ();

}

struct tflist {

  struct tflist *next;

  char name[9];

};

static struct tflist *tmp_file_list;

static void clean_tmp (void)

{

  for (; tmp_file_list != NULL; tmp_file_list = tmp_file_list->next)

    unlink (tmp_file_list->name);

}

static int

new_tmp_file (char **fname)

{

  struct tflist *tf;

  int fd;

  if (tmp_file_list == NULL)

    atexit (clean_tmp);

  tf = xmalloc (sizeof (*tf));

  tf->next = tmp_file_list;

  tmp_file_list = tf;

  memcpy (tf->name, "ldXXXXXX", sizeof (tf->name));

  *fname = tf->name;

#ifdef HAVE_MKSTEMP

  fd = mkstemp (*fname);

#else

  *fname = mktemp (*fname);

  if (*fname == NULL)

    return -1;

  fd = open (fname, O_RDWR | O_CREAT | O_EXCL, 0600);

#endif

  return fd;

}

static FILE *

spu_elf_open_overlay_script (void)

{

  FILE *script = NULL;

  if (auto_overlay_file == NULL)

    {

      int fd = new_tmp_file (&auto_overlay_file);

      if (fd == -1)

        goto file_err;

      script = fdopen (fd, "w");

    }

  else

    script = fopen (auto_overlay_file, "w");

  if (script == NULL)

    {

    file_err:

      einfo ("%F%P: can not open script: %E\n");

    }

  return script;

}

static void

spu_elf_relink (void)

{

  char **argv = xmalloc ((my_argc + 5) * sizeof (*argv));

  memcpy (argv, my_argv, my_argc * sizeof (*argv));

  argv[my_argc++] = "--no-auto-overlay";

  if (tmp_file_list->name == auto_overlay_file)

    argv[my_argc++] = auto_overlay_file;

  argv[my_argc++] = "-T";

  argv[my_argc++] = auto_overlay_file;

  argv[my_argc] = 0;

  execvp (argv[0], (char *const *) argv);

  perror (argv[0]);

  _exit (127);

}

/* Final emulation specific call.  */

static void

gld${EMULATION_NAME}_finish (void)

{

  int need_laying_out;

  need_laying_out = bfd_elf_discard_info (link_info.output_bfd, &link_info);

  gld${EMULATION_NAME}_map_segments (need_laying_out);

  if (is_spu_target ())

    {

      if (local_store_lo < local_store_hi)

        {

          asection *s;

          s = spu_elf_check_vma (&link_info, auto_overlay,

                                 local_store_lo, local_store_hi,

                                 auto_overlay_fixed, auto_overlay_reserved,

                                 spu_elf_load_ovl_mgr,

                                 spu_elf_open_overlay_script,

                                 spu_elf_relink);

          if (s != NULL && !auto_overlay)

            einfo ("%X%P: %A exceeds local store range\n", s);

        }

      else if (auto_overlay)

        einfo ("%P: --auto-overlay ignored with zero local store range\n");

      if (!spu_elf_build_stubs (&link_info,

                                emit_stub_syms || link_info.emitrelocations))

        einfo ("%X%P: can not build overlay stubs: %E\n");

    }

  finish_default ();

}

static char *

gld${EMULATION_NAME}_choose_target (int argc, char *argv[])

{

  my_argc = argc;

  my_argv = argv;

  return ldemul_default_target (argc, argv);

}

EOF

if grep -q 'ld_elf.*ppc.*_emulation' ldemul-list.h; then

  fragment <

#include "filenames.h"

#include 

#include 

static const char *

base_name (const char *path)

{

  const char *file = strrchr (path, '/');

#ifdef HAVE_DOS_BASED_FILE_SYSTEM

  {

    char *bslash = strrchr (path, '\\\\');

    if (file == NULL || (bslash != NULL && bslash > file))

      file = bslash;

    if (file == NULL

        && path[0] != '\0'

        && path[1] == ':')

      file = path + 1;

  }

#endif

  if (file == NULL)

    file = path;

  else

    ++file;

  return file;

}

/* This function is called when building a ppc32 or ppc64 executable

   to handle embedded spu images.  */

extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);

bfd_boolean

embedded_spu_file (lang_input_statement_type *entry, const char *flags)

{

  const char *cmd[6];

  const char *sym;

  char *handle, *p;

  char *oname;

  int fd;

  pid_t pid;

  int status;

  union lang_statement_union **old_stat_tail;

  union lang_statement_union **old_file_tail;

  union lang_statement_union *new_ent;

  lang_input_statement_type *search;

  if (entry->the_bfd->format != bfd_object

      || strcmp (entry->the_bfd->xvec->name, "elf32-spu") != 0

      || (entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_EXEC

          && entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_DYN))

    return FALSE;

  /* Use the filename as the symbol marking the program handle struct.  */

  sym = base_name (entry->the_bfd->filename);

  handle = xstrdup (sym);

  for (p = handle; *p; ++p)

    if (!(ISALNUM (*p) || *p == '$' || *p == '.'))

      *p = '_';

  fd = new_tmp_file (&oname);

  if (fd == -1)

    return FALSE;

  close (fd);

  for (search = (lang_input_statement_type *) input_file_chain.head;

       search != NULL;

       search = (lang_input_statement_type *) search->next_real_file)

    if (search->filename != NULL)

      {

        const char *infile = base_name (search->filename);

        if (strncmp (infile, "crtbegin", 8) == 0)

          {

            if (infile[8] == 'S')

              flags = concat (flags, " -fPIC", (const char *) NULL);

            else if (infile[8] == 'T')

              flags = concat (flags, " -fpie", (const char *) NULL);

            break;

          }

      }

  /* Use fork() and exec() rather than system() so that we don't

     need to worry about quoting args.  */

  cmd[0] = EMBEDSPU;

  cmd[1] = flags;

  cmd[2] = handle;

  cmd[3] = entry->the_bfd->filename;

  cmd[4] = oname;

  cmd[5] = NULL;

  if (trace_file_tries)

    {

      info_msg (_("running: %s \"%s\" \"%s\" \"%s\" \"%s\"\n"),

                cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]);

      fflush (stdout);

    }

  pid = fork ();

  if (pid == -1)

    return FALSE;

  if (pid == 0)

    {

      execvp (cmd[0], (char *const *) cmd);

      if (strcmp ("embedspu", EMBEDSPU) != 0)

        {

          cmd[0] = "embedspu";

          execvp (cmd[0], (char *const *) cmd);

        }

      perror (cmd[0]);

      _exit (127);

    }

#ifdef HAVE_WAITPID

#define WAITFOR(PID, STAT) waitpid (PID, STAT, 0)

#else

#define WAITFOR(PID, STAT) wait (STAT)

#endif

  if (WAITFOR (pid, &status) != pid

      || !WIFEXITED (status)

      || WEXITSTATUS (status) != 0)

    return FALSE;

#undef WAITFOR

  old_stat_tail = stat_ptr->tail;

  old_file_tail = input_file_chain.tail;

  if (lang_add_input_file (oname, lang_input_file_is_file_enum, NULL) == NULL)

    return FALSE;

  /* lang_add_input_file put the new list entry at the end of the statement

     and input file lists.  Move it to just after the current entry.  */

  new_ent = *old_stat_tail;

  *old_stat_tail = NULL;

  stat_ptr->tail = old_stat_tail;

  *old_file_tail = NULL;

  input_file_chain.tail = old_file_tail;

  new_ent->header.next = entry->header.next;

  entry->header.next = new_ent;

  new_ent->input_statement.next_real_file = entry->next_real_file;

  entry->next_real_file = new_ent;

  /* Ensure bfd sections are excluded from the output.  */

  bfd_section_list_clear (entry->the_bfd);

  entry->loaded = TRUE;

  return TRUE;

}

EOF

fi

# Define some shell vars to insert bits of code into the standard elf

# parse_args and list_options functions.

#

PARSE_AND_LIST_PROLOGUE='

#define OPTION_SPU_PLUGIN               301

#define OPTION_SPU_NO_OVERLAYS          (OPTION_SPU_PLUGIN + 1)

#define OPTION_SPU_STUB_SYMS            (OPTION_SPU_NO_OVERLAYS + 1)

#define OPTION_SPU_NON_OVERLAY_STUBS    (OPTION_SPU_STUB_SYMS + 1)

#define OPTION_SPU_LOCAL_STORE          (OPTION_SPU_NON_OVERLAY_STUBS + 1)

#define OPTION_SPU_STACK_ANALYSIS       (OPTION_SPU_LOCAL_STORE + 1)

#define OPTION_SPU_STACK_SYMS           (OPTION_SPU_STACK_ANALYSIS + 1)

#define OPTION_SPU_AUTO_OVERLAY         (OPTION_SPU_STACK_SYMS + 1)

#define OPTION_SPU_AUTO_RELINK          (OPTION_SPU_AUTO_OVERLAY + 1)

#define OPTION_SPU_OVERLAY_RODATA       (OPTION_SPU_AUTO_RELINK + 1)

#define OPTION_SPU_FIXED_SPACE          (OPTION_SPU_OVERLAY_RODATA + 1)

#define OPTION_SPU_RESERVED_SPACE       (OPTION_SPU_FIXED_SPACE + 1)

#define OPTION_SPU_NO_AUTO_OVERLAY      (OPTION_SPU_RESERVED_SPACE + 1)

'

PARSE_AND_LIST_LONGOPTS='

  { "plugin", no_argument, NULL, OPTION_SPU_PLUGIN },

  { "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS },

  { "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS },

  { "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS },

  { "local-store", required_argument, NULL, OPTION_SPU_LOCAL_STORE },

  { "stack-analysis", no_argument, NULL, OPTION_SPU_STACK_ANALYSIS },

  { "emit-stack-syms", no_argument, NULL, OPTION_SPU_STACK_SYMS },

  { "auto-overlay", optional_argument, NULL, OPTION_SPU_AUTO_OVERLAY },

  { "auto-relink", no_argument, NULL, OPTION_SPU_AUTO_RELINK },

  { "overlay-rodata", no_argument, NULL, OPTION_SPU_OVERLAY_RODATA },

  { "fixed-space", required_argument, NULL, OPTION_SPU_FIXED_SPACE },

  { "reserved-space", required_argument, NULL, OPTION_SPU_RESERVED_SPACE },

  { "no-auto-overlay", optional_argument, NULL, OPTION_SPU_NO_AUTO_OVERLAY },

'

PARSE_AND_LIST_OPTIONS='

  fprintf (file, _("\

  --plugin                    Make SPU plugin.\n\

  --no-overlays               No overlay handling.\n\

  --emit-stub-syms            Add symbols on overlay call stubs.\n\

  --extra-overlay-stubs       Add stubs on all calls out of overlay regions.\n\

  --local-store=lo:hi         Valid address range.\n\

  --stack-analysis            Estimate maximum stack requirement.\n\

  --emit-stack-syms           Add sym giving stack needed for each func.\n\

  --auto-overlay [=filename]  Create an overlay script in filename if\n\

                              executable does not fit in local store.\n\

  --auto-relink               Rerun linker using auto-overlay script.\n\

  --overlay-rodata            Place read-only data with associated function\n\

                              code in overlays.\n\

  --fixed-space=bytes         Local store for non-overlay code and data.\n\

  --reserved-space=bytes      Local store for stack and heap.\n"

                   ));

'

PARSE_AND_LIST_ARGS_CASES='

    case OPTION_SPU_PLUGIN:

      spu_elf_plugin (1);

      break;

    case OPTION_SPU_NO_OVERLAYS:

      no_overlays = 1;

      break;

    case OPTION_SPU_STUB_SYMS:

      emit_stub_syms = 1;

      break;

    case OPTION_SPU_NON_OVERLAY_STUBS:

      non_overlay_stubs = 1;

      break;

    case OPTION_SPU_LOCAL_STORE:

      {

        char *end;

        local_store_lo = strtoul (optarg, &end, 0);

        if (*end == '\'':'\'')

          {

            local_store_hi = strtoul (end + 1, &end, 0);

            if (*end == 0)

              break;

          }

        einfo (_("%P%F: invalid --local-store address range `%s'\''\n"), optarg);

      }

      break;

    case OPTION_SPU_STACK_ANALYSIS:

      stack_analysis = 1;

      break;

    case OPTION_SPU_STACK_SYMS:

      emit_stack_syms = 1;

      break;

    case OPTION_SPU_AUTO_OVERLAY:

      auto_overlay |= 1;

      if (optarg != NULL)

        {

          auto_overlay_file = optarg;

          break;

        }

      /* Fall thru */

    case OPTION_SPU_AUTO_RELINK:

      auto_overlay |= 2;

      break;

    case OPTION_SPU_OVERLAY_RODATA:

      auto_overlay |= 4;

      break;

    case OPTION_SPU_FIXED_SPACE:

      {

        char *end;

        auto_overlay_fixed = strtoul (optarg, &end, 0);

        if (*end != 0)

          einfo (_("%P%F: invalid --fixed-space value `%s'\''\n"), optarg);

      }

      break;

    case OPTION_SPU_RESERVED_SPACE:

      {

        char *end;

        auto_overlay_reserved = strtoul (optarg, &end, 0);

        if (*end != 0)

          einfo (_("%P%F: invalid --reserved-space value `%s'\''\n"), optarg);

      }

      break;

    case OPTION_SPU_NO_AUTO_OVERLAY:

      auto_overlay = 0;

      if (optarg != NULL)

        {

          struct tflist *tf;

          size_t len;

          if (tmp_file_list == NULL)

            atexit (clean_tmp);

          len = strlen (optarg) + 1;

          tf = xmalloc (sizeof (*tf) - sizeof (tf->name) + len);

          memcpy (tf->name, optarg, len);

          tf->next = tmp_file_list;

          tmp_file_list = tf;

          break;

        }

      break;

'

LDEMUL_AFTER_OPEN=spu_after_open

LDEMUL_BEFORE_ALLOCATION=spu_before_allocation

LDEMUL_FINISH=gld${EMULATION_NAME}_finish

LDEMUL_CHOOSE_TARGET=gld${EMULATION_NAME}_choose_target