path: root/ld/emultempl/pe.em

# This shell script emits a C file. -*- C -*-
# It does some substitutions.
cat >e${EMULATION_NAME}.c <<EOF
/* For WINDOWS_NT */
/* The original file generated returned different default scripts depending
   on whether certain switches were set, but these switches pertain to the
   Linux system and that particular version of coff.  In the NT case, we
   only determine if the subsystem is console or windows in order to select
   the correct entry point by default. */ 
  

/* This file is part of GLD, the Gnu Linker.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */


#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "getopt.h"
#include "ld.h"
#include "ld.h"
#include "ldmain.h"
#include "ldgram.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldemul.h"
#include "ldlex.h"
#include "ldmisc.h"
#include "ldctor.h"
#include "ldfile.h"
#include "coff/internal.h"
#include "../bfd/libcoff.h"

#define TARGET_IS_${EMULATION_NAME}

static void gld_${EMULATION_NAME}_before_parse PARAMS ((void));
static char *gld_${EMULATION_NAME}_get_script PARAMS ((int *isfile));
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 struct internal_extra_pe_aouthdr pe;
static int dll;

static void
gld_${EMULATION_NAME}_before_parse()
{
  ldfile_output_architecture = bfd_arch_${ARCH};
}


/* Used for setting flags in the PE header. */
#define OPTION_BASE_FILE		(300  + 1)
#define OPTION_DLL			(OPTION_BASE_FILE + 1)
#define OPTION_FILE_ALIGNMENT		(OPTION_DLL + 1)
#define OPTION_IMAGE_BASE		(OPTION_FILE_ALIGNMENT + 1)
#define OPTION_MAJOR_IMAGE_VERSION	(OPTION_IMAGE_BASE + 1)
#define OPTION_MAJOR_OS_VERSION		(OPTION_MAJOR_IMAGE_VERSION + 1)
#define OPTION_MAJOR_SUBSYSTEM_VERSION	(OPTION_MAJOR_OS_VERSION + 1)
#define OPTION_MINOR_IMAGE_VERSION	(OPTION_MAJOR_SUBSYSTEM_VERSION + 1)
#define OPTION_MINOR_OS_VERSION		(OPTION_MINOR_IMAGE_VERSION + 1)
#define OPTION_MINOR_SUBSYSTEM_VERSION	(OPTION_MINOR_OS_VERSION + 1)
#define OPTION_SECTION_ALIGNMENT	(OPTION_MINOR_SUBSYSTEM_VERSION + 1)
#define OPTION_STACK                    (OPTION_SECTION_ALIGNMENT + 1)
#define OPTION_SUBSYSTEM                (OPTION_STACK + 1)
#define OPTION_HEAP			(OPTION_SUBSYSTEM + 1)

static struct option longopts[] = {
  /* PE options */
    {"base-file", required_argument, NULL, OPTION_BASE_FILE},
    {"dll", no_argument, NULL, OPTION_DLL},
    {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
    {"heap", required_argument, NULL, OPTION_HEAP}, 
    {"image-base", required_argument, NULL, OPTION_IMAGE_BASE}, 
    {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
    {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
    {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
    {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
    {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
    {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
    {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
    {"stack", required_argument, NULL, OPTION_STACK},
    {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
   {NULL, no_argument, NULL, 0}
  };


/* PE/WIN32; added routines to get the subsystem type, heap and/or stack
   parameters which may be input from the command line */

typedef struct {
  void *ptr;
  int size;
  int value;
  char *symbol;
  int inited;
} definfo;

#define D(field,symbol,def)  {&pe.field,sizeof(pe.field), def, symbol,0}

static definfo init[] =
{
  /* imagebase must be first */
#define IMAGEBASEOFF 0
  D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
#define DLLOFF 1
  {&dll, sizeof(dll), 0, "__dll__"},
  D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
  D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
  D(MajorOperatingSystemVersion,"__major_os_version__", 4),
  D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
  D(MajorImageVersion,"__major_image_version__", 1),
  D(MinorImageVersion,"__minor_image_version__", 0),
  D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
  D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
  D(Subsystem,"__subsystem__", 3),
  D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x100000),
  D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
  D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
  D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
  D(LoaderFlags,"__loader_flags__", 0x0),
  0
};


static void
set_pe_name (name, val)
     char *name;
     long val;
{
  int i;
  /* Find the name and set it. */
  for (i = 0; init[i].ptr; i++)
    {
      if (strcmp (name, init[i].symbol) == 0)
	{
	  init[i].value = val;
	  init[i].inited = 1;
	  return;
	}
    }
  abort();
}


static void
set_pe_subsystem ()
{
  int i;
  static struct 
    {
      char *name ;
      int value;
    }
  v[] =
    {
      {"native", 1},
      {"windows",2},
      {"console",3},
      {"os2",5},
      {"posix", 7},
      {0,0}
    };

  for (i = 0; v[i].name; i++)
    {
      if (!strcmp (optarg, v[i].name)) 
	{
	  set_pe_name ("__subsystem__", v[i].value);
	  return;
	}
    }
  einfo ("%P%F: invalid subsystem type %s\n", optarg);
}



static void
set_pe_value (name)
     char *name;
     
{
  char *end;
  set_pe_name (name,  strtoul (optarg, &end, 16));
  if (end == optarg)
    {
      einfo ("%P%F: invalid hex number for PE parameter '%s'\n", optarg);
    }

  optarg = end;
}

static void
set_pe_stack_heap (resname, comname)
     char *resname;
     char *comname;
{
  char *begin_commit;
  char *end;

  set_pe_value (resname);
  if (*optarg == ',')
    {
      optarg++;
      set_pe_value (comname);
    }
  else if (*optarg)
    {
      einfo ("%P%F: strange hex info for PE parameter '%s'\n", optarg);
    }
}



static int
gld_${EMULATION_NAME}_parse_args(argc, argv)
     int argc;
     char **argv;
{
  int longind;
  int optc;
  int prevoptind = optind;
  int prevopterr = opterr;
  int wanterror;
  static int lastoptind = -1;

  if (lastoptind != optind)
    opterr = 0;
  wanterror = opterr;

  lastoptind = optind;

  optc = getopt_long_only (argc, argv, "-", longopts, &longind);
  opterr = prevopterr;

  switch (optc)
    {
    default:
      if (wanterror)
	xexit (1);
      optind =  prevoptind;
      return 0;

    case OPTION_BASE_FILE:
      link_info.base_file = (PTR) fopen (optarg, FOPEN_WB);
      if (link_info.base_file == NULL)
	{
	  fprintf (stderr, "%s: Can't open base file %s\n",
		   program_name, optarg);
	  xexit (1);
	}
      break;

      /* PE options */
    case OPTION_HEAP: 
      set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
      break;
    case OPTION_STACK: 
      set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
      break;
    case OPTION_SUBSYSTEM:
      set_pe_subsystem ();
      break;
    case OPTION_MAJOR_OS_VERSION:
      set_pe_value ("__major_os_version__");
      break;
    case OPTION_MINOR_OS_VERSION:
      set_pe_value ("__minor_os_version__");
      break;
    case OPTION_MAJOR_SUBSYSTEM_VERSION:
      set_pe_value ("__major_subsystem_version__");
      break;
    case OPTION_MINOR_SUBSYSTEM_VERSION:
      set_pe_value ("__minor_subsystem_version__");
      break;
    case OPTION_MAJOR_IMAGE_VERSION:
      set_pe_value ("__major_image_version__");
      break;
    case OPTION_MINOR_IMAGE_VERSION:
      set_pe_value ("__minor_image_version__");
      break;
    case OPTION_FILE_ALIGNMENT:
      set_pe_value ("__file_alignment__");
      break;
    case OPTION_SECTION_ALIGNMENT:
      set_pe_value ("__section_alignment__");
      break;
    case OPTION_DLL:
      set_pe_name ("__dll__", 1);
      break;
    case OPTION_IMAGE_BASE:
      set_pe_value ("__image_base__");
      break;
    }
  return 1;
}

static void
gld_${EMULATION_NAME}_set_symbols() 
{
  /* Run through and invent symbols for all the
     names and insert the defaults. */
  int j;
  lang_statement_list_type *save;

  if (!init[IMAGEBASEOFF].inited)
    init[IMAGEBASEOFF].value = init[DLLOFF].value
      ? NT_DLL_IMAGE_BASE : NT_EXE_IMAGE_BASE;

  /* Glue the assignments into the abs section */
  save = stat_ptr;

  stat_ptr = &(abs_output_section->children);

  for (j = 0; init[j].ptr; j++)
    {
      long val = init[j].value;
      lang_add_assignment (exp_assop ('=' ,init[j].symbol, exp_intop (val)));
      if (init[j].size == sizeof(short))
	*(short *)init[j].ptr = val;
      else if (init[j].size == sizeof(int))
	*(int *)init[j].ptr = val;
      else if (init[j].size == sizeof(long))
	*(long *)init[j].ptr = val;
      else	abort();
    }
  /* Restore the pointer. */
  stat_ptr = save;
  
  if (pe.FileAlignment >
      pe.SectionAlignment)
    {
      einfo ("%P: warning, file alignment > section alignment.\n");
    }
}

static void
gld_${EMULATION_NAME}_after_open()
{
  /* Pass the wacky PE command line options into the output bfd */
  struct internal_extra_pe_aouthdr *i;
  if (!coff_data(output_bfd)->pe)
    {
      einfo ("%F%P: PE operations on non PE file.\n");
    }

  pe_data(output_bfd)->pe_opthdr = pe;
  pe_data(output_bfd)->dll = init[DLLOFF].value;

}

/* Callback function for qsort in sort_sections. */

static int sfunc (a, b)
void *a;
void *b;
{
  lang_statement_union_type **ra = a;
  lang_statement_union_type **rb = b;
  return strcmp ((*ra)->input_section.ifile->filename,
		 (*rb)->input_section.ifile->filename);
}

/* Sort the input sections of archives into filename order. */

static void
sort_sections (s)
     lang_statement_union_type *s;
{
  for (; s ; s = s->next)
    switch (s->header.type)
      {
      case lang_output_section_statement_enum:
	sort_sections (s->output_section_statement.children.head);
	break;
      case lang_wild_statement_enum:
	{
	  lang_statement_union_type **p = &s->wild_statement.children.head;

	  /* Sort any children in the same archive.  Run through all
	     the children of this wild statement, when an
	     input_section in an archive is found, scan forward to
	     find all input_sections which are in the same archive.
	     Sort them by their filename and then re-thread the
	     pointer chain. */

	  while (*p)
	    {
	      lang_statement_union_type *start = *p;
	      if (start->header.type != lang_input_section_enum
		  || !start->input_section.ifile->the_bfd->my_archive)
		p = &(start->header.next);
	      else
		{
		  lang_statement_union_type **vec;
		  lang_statement_union_type *end;
		  lang_statement_union_type *np;
		  int count;
		  int i;

		  for (end = start, count = 0;
		       end && end->header.type == lang_input_section_enum
		       && (end->input_section.ifile->the_bfd->my_archive
			   == start->input_section.ifile->the_bfd->my_archive);
		       end = end->next)
		    count++;

		  np = end;

		  vec = (lang_statement_union_type **)
		    alloca (count * sizeof (lang_statement_union_type *));

		  for (end = start, i = 0; i < count; i++, end = end->next)
		    vec[i] = end;

		  qsort (vec, count, sizeof (vec[0]), sfunc);

		  /* Fill in the next pointers again. */
		  *p = vec[0];
		  for (i = 0; i < count - 1; i++)
		    vec[i]->header.next = vec[i + 1];
		  vec[i]->header.next = np;
		  p = &(vec[i]->header.next);
		}
	    }
	}
	break;
      default:
	break;
      }
}

static void  
gld_${EMULATION_NAME}_before_allocation()
{
  extern lang_statement_list_type *stat_ptr;

#ifdef TARGET_IS_ppcpe
  /* Here we rummage through the found bfds to collect toc information */
  {
    LANG_FOR_EACH_INPUT_STATEMENT (is)
      {
	ppc_process_before_allocation(is->the_bfd, &link_info);
      }
  }

  /* We have seen it all. Allocate it, and carry on */
  ppc_allocate_toc_section (&link_info);
#endif

  sort_sections (*stat_ptr);
}

/* Place an orphan section.  We use this to put random sections
   (e.g. those used to implement linkonce support) into the right place.  */

/* These are used to communicate information from 
   gld${EMULATION_NAME}_place_section to gld${EMULATION_NAME}_place_orphan.  */
static asection *hold_section;
static lang_output_section_statement_type *hold_use;
static lang_output_section_statement_type *hold_text;
static lang_output_section_statement_type *hold_rdata;
static lang_output_section_statement_type *hold_data;

/*ARGSUSED*/
static boolean
gld${EMULATION_NAME}_place_orphan (file, s)
     lang_input_statement_type *file;
     asection *s;
{
  lang_output_section_statement_type *place;
  asection *snew, **pps;
  lang_statement_list_type *old;
  lang_statement_list_type add;
  etree_type *address;
  const char *secname, *ps;
  lang_output_section_statement_type *os;

  if ((s->flags & SEC_ALLOC) == 0)
    return false;

  /* 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);

  if (hold_use != NULL)
    {
      /* We have already placed a section with this name.  */
      wild_doit (&hold_use->children, s, hold_use, file);
      return true;
    }

  secname = bfd_get_section_name (s->owner, s);

  /* Decide which output section the section should go in.
     This is here to help implement "one-only" support.  Such functions and
     variables are prefixed with .text., .rdata., or .data. We must keep all
     all functions together but the linker doesn't support wildcard section
     names.  */
  place = NULL;
  if (strncmp (secname, ".text.", 6) == 0
	   && hold_text != NULL)
    place = hold_text;
  else if (strncmp (secname, ".rdata.", 7) == 0
	   && hold_rdata != NULL)
    place = hold_rdata;
  else if (strncmp (secname, ".data.", 6) == 0
	   && hold_data != NULL)
    place = hold_data;
  if (place == NULL)
    return false;

  /* 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, secname);
  if (snew == NULL)
      einfo ("%P%F: output format %s cannot represent section called %s\n",
	     output_bfd->xvec->name, secname);
  if (place->bfd_section != NULL)
    {
      for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next)
	;
      *pps = snew->next;
      snew->next = place->bfd_section->next;
      place->bfd_section->next = snew;
    }

  /* Start building a list of statements for this section.  */
  old = stat_ptr;
  stat_ptr = &add;
  lang_list_init (stat_ptr);

#if 0 /* ??? elf32.em does this, do we need to?  */
  /* 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 = secname; *ps != '\0'; ps++)
    if (! isalnum (*ps) && *ps != '_')
      break;
  if (*ps == '\0' && config.build_constructors)
    {
      char *symname;

      symname = (char *) xmalloc (ps - secname + sizeof "__start_");
      sprintf (symname, "__start_%s", secname);
      lang_add_assignment (exp_assop ('=', symname,
				      exp_nameop (NAME, ".")));
    }
#endif

  if (! link_info.relocateable)
    address = NULL;
  else
    address = exp_intop ((bfd_vma) 0);

  lang_enter_output_section_statement (secname, address, 0,
				       (bfd_vma) 0,
				       (etree_type *) NULL,
				       (etree_type *) NULL,
				       (etree_type *) NULL);

  os = lang_output_section_statement_lookup (secname);
  wild_doit (&os->children, s, os, file);

  lang_leave_output_section_statement ((bfd_vma) 0, "*default*");
  stat_ptr = &add;

#if 0 /* ??? elf32.em does this, do we need to?  */
  if (*ps == '\0' && config.build_constructors)
    {
      char *symname;

      symname = (char *) xmalloc (ps - secname + sizeof "__stop_");
      sprintf (symname, "__stop_%s", secname);
      lang_add_assignment (exp_assop ('=', symname,
				      exp_nameop (NAME, ".")));
    }
#endif

  /* Now stick the new statement list right after PLACE.  */
  *add.tail = place->header.next;
  place->header.next = add.head;

  stat_ptr = old;

  return true;
}

/* Subroutine of gld${EMULATION_NAME}_place_orphan, passed as argument to
   lang_for_each_statement to see if S has already been output, and to scan
   for .text,.rdata,.data.  */

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;

  os = &s->output_section_statement;

  if (strcmp (os->name, hold_section->name) == 0)
    hold_use = os;

  if (strcmp (os->name, ".text") == 0)
    hold_text = os;
  else if (strcmp (os->name, ".rdata") == 0)
    hold_rdata = os;
  else if (strcmp (os->name, ".data") == 0)
    hold_data = os;
}

static char *
gld_${EMULATION_NAME}_get_script(isfile)
     int *isfile;
EOF
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc="-f ${srcdir}/emultempl/stringify.sed"

cat >>e${EMULATION_NAME}.c <<EOF
{			     
  *isfile = 0;

  if (link_info.relocateable == true && config.build_constructors == true)
    return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
echo '  ; else return'                                     >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
echo '; }'                                                 >> e${EMULATION_NAME}.c

cat >>e${EMULATION_NAME}.c <<EOF


struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 
{
  gld_${EMULATION_NAME}_before_parse,
  syslib_default,
  hll_default,
  after_parse_default,
  gld_${EMULATION_NAME}_after_open,
  after_allocation_default,
  set_output_arch_default,
  ldemul_default_target,
  gld_${EMULATION_NAME}_before_allocation,
  gld_${EMULATION_NAME}_get_script,
  "${EMULATION_NAME}",
  "${OUTPUT_FORMAT}",
  NULL, /* finish */
  NULL, /* create output section statements */
  NULL, /* open dynamic archive */
  gld${EMULATION_NAME}_place_orphan,
  gld_${EMULATION_NAME}_set_symbols,
  gld_${EMULATION_NAME}_parse_args
};
EOF