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[deliverable/binutils-gdb.git] / binutils / dlltool.c

/* dlltool.c -- tool to generate stuff for PE style DLLs 
   Copyright (C) 1995, 96, 97, 1998 Free Software Foundation, Inc.

   This file is part of 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 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.  */


/*
   This program allows you to build the files necessary to create
   DLLs to run on a system which understands PE format image files.
   (eg, Windows NT)

   See "Peering Inside the PE: A Tour of the Win32 Portable Executable
   File Format", MSJ 1994, Volume 9 for more information.
   Also see "Microsoft Portable Executable and Common Object File Format,
   Specification 4.1" for more information.

   A DLL contains an export table which contains the information
   which the runtime loader needs to tie up references from a
   referencing program. 

   The export table is generated by this program by reading
   in a .DEF file or scanning the .a and .o files which will be in the
   DLL.  A .o file can contain information in special  ".drectve" sections
   with export information.  

   A DEF file contains any number of the following commands:


   NAME <name> [ , <base> ] 
   The result is going to be <name>.EXE

   LIBRARY <name> [ , <base> ]    
   The result is going to be <name>.DLL

   EXPORTS  ( <name1> [ = <name2> ] [ @ <integer> ] [ NONAME ] [CONSTANT] [DATA] ) *
   Declares name1 as an exported symbol from the
   DLL, with optional ordinal number <integer>

   IMPORTS  ( [ <name> = ] <name> . <name> ) *
   Ignored for compatibility

   DESCRIPTION <string>
   Puts <string> into output .exp file in the .rdata section

   [STACKSIZE|HEAPSIZE] <number-reserve> [ , <number-commit> ]
   Generates --stack|--heap <number-reserve>,<number-commit>
   in the output .drectve section.  The linker will
   see this and act upon it.

   [CODE|DATA] <attr>+
   SECTIONS ( <sectionname> <attr>+ )*
   <attr> = READ | WRITE | EXECUTE | SHARED
   Generates --attr <sectionname> <attr> in the output
   .drectve section.  The linker will see this and act
   upon it.


   A -export:<name> in a .drectve section in an input .o or .a
   file to this program is equivalent to a EXPORTS <name>
   in a .DEF file.



   The program generates output files with the prefix supplied
   on the command line, or in the def file, or taken from the first 
   supplied argument.

   The .exp.s file contains the information necessary to export
   the routines in the DLL.  The .lib.s file contains the information
   necessary to use the DLL's routines from a referencing program.



   Example:

   file1.c: 
   asm (".section .drectve");  
   asm (".ascii \"-export:adef\"");

   adef(char *s)
   {
   printf("hello from the dll %s\n",s);
   }

   bdef(char *s)
   {
   printf("hello from the dll and the other entry point %s\n",s);
   }

   file2.c:
   asm (".section .drectve");
   asm (".ascii \"-export:cdef\"");
   asm (".ascii \"-export:ddef\"");
   cdef(char *s)
   {
   printf("hello from the dll %s\n",s);
   }

   ddef(char *s)
   {
   printf("hello from the dll and the other entry point %s\n",s);
   }

   printf()
   {
   return 9;
   }

   main.c

   main()
   {
   cdef();
   }

   thedll.def

   LIBRARY thedll
   HEAPSIZE 0x40000, 0x2000
   EXPORTS bdef @ 20
   cdef @ 30 NONAME 

   SECTIONS donkey READ WRITE
   aardvark EXECUTE


   # compile up the parts of the dll

   gcc -c file1.c       
   gcc -c file2.c

   # put them in a library (you don't have to, you
   # could name all the .os on the dlltool line)

   ar  qcv thedll.in file1.o file2.o
   ranlib thedll.in

   # run this tool over the library and the def file
   ./dlltool --def thedll.def --output-exp thedll.o --output-lib thedll.a

   # build the dll with the library with file1.o, file2.o and the export table
   ld -o thedll.dll thedll.o thedll.in

   # build the mainline
   gcc -c themain.c 

   # link the executable with the import library
   ld -e main -Tthemain.ld -o themain.exe themain.o thedll.a

 */

/* .idata section description

   The .idata section is the import table.  It is a collection of several
   subsections used to keep the pieces for each dll together: .idata$[234567].
   IE: Each dll's .idata$2's are catenated together, each .idata$3's, etc.

   .idata$2 = Import Directory Table
   = array of IMAGE_IMPORT_DESCRIPTOR's.

	DWORD   Characteristics;      - pointer to .idata$4
	DWORD   TimeDateStamp;        - currently always 0
	DWORD   ForwarderChain;       - currently always 0
	DWORD   Name;                 - pointer to dll's name
	PIMAGE_THUNK_DATA FirstThunk; - pointer to .idata$5

   .idata$3 = null terminating entry for .idata$2.

   .idata$4 = Import Lookup Table
   = array of array of pointers to hint name table.
   There is one for each dll being imported from, and each dll's set is
   terminated by a trailing NULL.

   .idata$5 = Import Address Table
   = array of array of pointers to hint name table.
   There is one for each dll being imported from, and each dll's set is
   terminated by a trailing NULL.
   Initially, this table is identical to the Import Lookup Table.  However,
   at load time, the loader overwrites the entries with the address of the
   function.

   .idata$6 = Hint Name Table
   = Array of { short, asciz } entries, one for each imported function.
   The `short' is the function's ordinal number.

   .idata$7 = dll name (eg: "kernel32.dll"). (.idata$6 for ppc)
*/

/* AIX requires this to be the first thing in the file.  */
#ifndef __GNUC__
# ifdef _AIX
 #pragma alloca
#endif
#endif

#define show_allnames 0

#define PAGE_SIZE 4096
#define PAGE_MASK (-PAGE_SIZE)
#include "bfd.h"
#include "libiberty.h"
#include "bucomm.h"
#include "getopt.h"
#include "demangle.h"
#include "dlltool.h"

#include <ctype.h>
#include <time.h>

#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#else /* ! HAVE_SYS_WAIT_H */
#if ! defined (_WIN32) || defined (__CYGWIN32__)
#ifndef WIFEXITED
#define WIFEXITED(w)	(((w)&0377) == 0)
#endif
#ifndef WIFSIGNALED
#define WIFSIGNALED(w)	(((w)&0377) != 0177 && ((w)&~0377) == 0)
#endif
#ifndef WTERMSIG
#define WTERMSIG(w)	((w) & 0177)
#endif
#ifndef WEXITSTATUS
#define WEXITSTATUS(w)	(((w) >> 8) & 0377)
#endif
#else /* defined (_WIN32) && ! defined (__CYGWIN32__) */
#ifndef WIFEXITED
#define WIFEXITED(w)	(((w) & 0xff) == 0)
#endif
#ifndef WIFSIGNALED
#define WIFSIGNALED(w)	(((w) & 0xff) != 0 && ((w) & 0xff) != 0x7f)
#endif
#ifndef WTERMSIG
#define WTERMSIG(w)	((w) & 0x7f)
#endif
#ifndef WEXITSTATUS
#define WEXITSTATUS(w)	(((w) & 0xff00) >> 8)
#endif
#endif /* defined (_WIN32) && ! defined (__CYGWIN32__) */
#endif /* ! HAVE_SYS_WAIT_H */

/* ifunc and ihead data structures: ttk@cygnus.com 1997            
     When IMPORT declarations are encountered in a .def file the  
  function import information is stored in a structure referenced 
  by the global variable "(iheadtype*) import_list".  The struc-  
  ture is a linked list containing the names of the dll files     
  each function is imported from and a linked list of functions   
  being imported from that dll file.  This roughly parallels the  
  structure of the .idata section in the PE object file.          
     The contents of .def file are interpreted from within the    
  process__def_file() function.  Every time an IMPORT declaration 
  is encountered, it is broken up into its component parts and    
  passed to def_import().  import_list is initialized to NULL in  
  function main().                                                
 */
 
typedef struct ifunct      
  {
     char          *name;   /* name of function being imported */
     int            ord;    /* two-byte ordinal value associated with function */
     struct ifunct *next;
  } 
ifunctype;

typedef struct iheadt      
  {
     char          *dllname;  /* name of dll file imported from */
     long           nfuncs;   /* number of functions in list */
     struct ifunct *funchead; /* first function in list */
     struct ifunct *functail; /* last  function in list */
     struct iheadt *next;     /* next dll file in list */
  } 
iheadtype;
 
/* ignore_imports: if true, IMPORT declarations are ignored   
     and no .import section will be created.  
  import_list: structure containing all import information as   
    defined in .def file (qv "ihead structure").                
  nheads: count of number of dll files recorded in import_list.
 */

static boolean      ignore_imports = false;           
static iheadtype   *import_list    = NULL;            
static long         nheads;                           

static char *as_name = "as";

static int no_idata4;
static int no_idata5;
static char *exp_name;
static char *imp_name;
static char *head_label;
static char *imp_name_lab;
static char *dll_name;

static int add_indirect = 0;
static int add_underscore = 0;
static int dontdeltemps = 0;

static char *def_file;

static char *program_name;

static int machine;
static int killat;
static int verbose;
static FILE *output_def;
static FILE *base_file;

#ifdef DLLTOOL_ARM
static const char *mname = "arm";
#endif

#ifdef DLLTOOL_I386
static const char *mname = "i386";
#endif

#ifdef DLLTOOL_PPC
static const char *mname = "ppc";
#endif

#define PATHMAX 250		/* What's the right name for this ? */

/* This bit of assemly does jmp * ....
s set how_jtab_roff to mark where the 32bit abs branch should go */
static const unsigned char i386_jtab[] =
{
  0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90
};

static const unsigned char arm_jtab[] =
{
  0x00, 0xc0, 0x9f, 0xe5,
  0x00, 0xf0, 0x9c, 0xe5,
  0,    0,    0,    0
};

/* This is the glue sequence for PowerPC PE. There is a  */
/* tocrel16-tocdefn reloc against the first instruction. */
/* We also need a IMGLUE reloc against the glue function */
/* to restore the toc saved by the third instruction in  */
/* the glue. */
static const unsigned char ppc_jtab[] = 
{ 
  0x00, 0x00, 0x62, 0x81, /* lwz r11,0(r2)               */
                          /*   Reloc TOCREL16 __imp_xxx  */
  0x00, 0x00, 0x8B, 0x81, /* lwz r12,0(r11)              */
  0x04, 0x00, 0x41, 0x90, /* stw r2,4(r1)                */
  0xA6, 0x03, 0x89, 0x7D, /* mtctr r12                   */
  0x04, 0x00, 0x4B, 0x80, /* lwz r2,4(r11)               */
  0x20, 0x04, 0x80, 0x4E  /* bctr                        */
};

#ifdef DLLTOOL_PPC
/* the glue instruction, picks up the toc from the stw in */
/* the above code: "lwz r2,4(r1)"                         */
static bfd_vma ppc_glue_insn = 0x80410004;
#endif

static char outfile[PATHMAX];

struct mac
  {
    const char *type;
    const char *how_byte;
    const char *how_short;
    const char *how_long;
    const char *how_asciz;
    const char *how_comment;
    const char *how_jump;
    const char *how_global;
    const char *how_space;
    const char *how_align_short;
    const char *how_align_long;
    const char *how_bfd_target;
    enum bfd_architecture how_bfd_arch;
    const unsigned char *how_jtab;
    int how_jtab_size; /* size of the jtab entry */
    int how_jtab_roff; /* offset into it for the ind 32 reloc into idata 5 */
  };

static const struct mac mtable[] =
{
  {
#define MARM 0
    "arm", ".byte", ".short", ".long", ".asciz", "@", 
    "ldr\tip,[pc]\n\tldr\tpc,[ip]\n\t.long",
    ".global", ".space", ".align\t2",".align\t4","pe-arm-little", bfd_arch_arm,
    arm_jtab, sizeof(arm_jtab),8
  }
  ,
  {
#define M386 1
    "i386", ".byte", ".short", ".long", ".asciz", "#", "jmp *", ".global", ".space", ".align\t2",".align\t4","pe-i386",bfd_arch_i386,
   i386_jtab,sizeof(i386_jtab),2,
  }
  ,
  {
#define MPPC 2
    "ppc", ".byte", ".short", ".long", ".asciz", "#", "jmp *", ".global", ".space", ".align\t2",".align\t4","pe-powerpcle",bfd_arch_powerpc,
   ppc_jtab,sizeof(ppc_jtab),0,
  }
  ,
{    0}
};

typedef struct dlist
{
  char *text;
  struct dlist *next;
}
dlist_type;

typedef struct export
  {
    const char *name;
    const char *internal_name;
    int ordinal;
    int constant;
    int noname;
    int data;
    int hint;
    struct export *next;
  }
export_type;

static const char *rvaafter PARAMS ((int));
static const char *rvabefore PARAMS ((int));
static const char *asm_prefix PARAMS ((int));
static void run PARAMS ((const char *, char *));
static void basenames PARAMS ((bfd *));
static void scan_open_obj_file PARAMS ((bfd *));
static void scan_obj_file PARAMS ((const char *));
static void dump_def_info PARAMS ((FILE *));
static int sfunc PARAMS ((const void *, const void *));
static void flush_page PARAMS ((FILE *, long *, int, int));
static void gen_def_file PARAMS ((void));
static void gen_exp_file PARAMS ((void));
static const char *xlate PARAMS ((const char *));
static void dump_iat PARAMS ((FILE *, export_type *));
static char *make_label PARAMS ((const char *, const char *));
static bfd *make_one_lib_file PARAMS ((export_type *, int));
static bfd *make_head PARAMS ((void));
static bfd *make_tail PARAMS ((void));
static void gen_lib_file PARAMS ((void));
static int pfunc PARAMS ((const void *, const void *));
static int nfunc PARAMS ((const void *, const void *));
static void remove_null_names PARAMS ((export_type **));
static void dtab PARAMS ((export_type **));
static void process_duplicates PARAMS ((export_type **));
static void fill_ordinals PARAMS ((export_type **));
static int alphafunc PARAMS ((const void *, const void *));
static void mangle_defs PARAMS ((void));
static void usage PARAMS ((FILE *, int));

static const char *
rvaafter (machine)
     int machine;
{
  switch (machine)
    {
    case MARM:
      return "";
    case M386:
      return "";
    case MPPC:
      return "";
    }
  return "";
}

static const char *
rvabefore (machine)
     int machine;
{
  switch (machine)
    {
    case MARM:
      return ".rva\t";
    case M386:
      return ".rva\t";
    case MPPC:
      return ".rva\t";
    }
  return "";
}

static const char *
asm_prefix (machine)
     int machine;
{
  switch (machine)
    {
    case MARM:
      return "";
    case M386:
      return "_";
    case MPPC:
      return "";
    }
  return "";
}

#define ASM_BYTE 	mtable[machine].how_byte
#define ASM_SHORT 	mtable[machine].how_short
#define ASM_LONG	mtable[machine].how_long
#define ASM_TEXT	mtable[machine].how_asciz
#define ASM_C 		mtable[machine].how_comment
#define ASM_JUMP 	mtable[machine].how_jump
#define ASM_GLOBAL	mtable[machine].how_global
#define ASM_SPACE	mtable[machine].how_space
#define ASM_ALIGN_SHORT mtable[machine].how_align_short
#define ASM_RVA_BEFORE 	rvabefore(machine)
#define ASM_RVA_AFTER  	rvaafter(machine)
#define ASM_PREFIX	asm_prefix(machine)
#define ASM_ALIGN_LONG mtable[machine].how_align_long
#define HOW_BFD_TARGET  0  /* always default*/
#define HOW_BFD_ARCH   mtable[machine].how_bfd_arch
#define HOW_JTAB       mtable[machine].how_jtab
#define HOW_JTAB_SIZE      mtable[machine].how_jtab_size
#define HOW_JTAB_ROFF      mtable[machine].how_jtab_roff
static char **oav;

FILE *yyin;          /* communications with flex */
extern int linenumber;

void
process_def_file (name)
     const char *name;
{
  FILE *f = fopen (name, FOPEN_RT);
  if (!f)
    {
      fprintf (stderr, _("%s: Can't open def file %s\n"), program_name, name);
      exit (1);
    }

  yyin = f;

  yyparse ();
}

/**********************************************************************/

/* Communications with the parser */

static const char *d_name;	/* Arg to NAME or LIBRARY */
static int d_nfuncs;		/* Number of functions exported */
static int d_named_nfuncs;	/* Number of named functions exported */
static int d_low_ord;		/* Lowest ordinal index */
static int d_high_ord;		/* Highest ordinal index */
static export_type *d_exports;	/*list of exported functions */
static export_type **d_exports_lexically;	/* vector of exported functions in alpha order */
static dlist_type *d_list;	/* Descriptions */
static dlist_type *a_list;	/* Stuff to go in directives */

static int d_is_dll;
static int d_is_exe;

int 
yyerror (err)
     const char *err;
{
  fprintf (stderr, _("%s: Syntax error in def file %s:%d\n"),
	   program_name, def_file, linenumber);
  return 0;
}

void
def_exports (name, internal_name, ordinal, noname, constant, data)
     const char *name;
     const char *internal_name;
     int ordinal;
     int noname;
     int constant;
     int data;
{
  struct export *p = (struct export *) xmalloc (sizeof (*p));

  p->name = name;
  p->internal_name = internal_name ? internal_name : name;
  p->ordinal = ordinal;
  p->constant = constant;
  p->noname = noname;
  p->data = data;
  p->next = d_exports;
  d_exports = p;
  d_nfuncs++;
}

void
def_name (name, base)
     const char *name;
     int base;
{
  if (verbose)
    fprintf (stderr, _("%s NAME %s base %x\n"), program_name, name, base);
  if (d_is_dll)
    {
      fprintf (stderr, _("Can't have LIBRARY and NAME\n"));
    }
  d_name = name;
  d_is_exe = 1;
}

void
def_library (name, base)
     const char *name;
     int base;
{
  if (verbose)
    printf (_("%s: LIBRARY %s base %x\n"), program_name, name, base);
  if (d_is_exe)
    {
      fprintf (stderr, _("%s: Can't have LIBRARY and NAME\n"), program_name);
    }
  d_name = name;
  d_is_dll = 1;
}

void
def_description (desc)
     const char *desc;
{
  dlist_type *d = (dlist_type *) xmalloc (sizeof (dlist_type));
  d->text = xstrdup (desc);
  d->next = d_list;
  d_list = d;
}

void
new_directive (dir)
     char *dir;
{
  dlist_type *d = (dlist_type *) xmalloc (sizeof (dlist_type));
  d->text = xstrdup (dir);
  d->next = a_list;
  a_list = d;
}

void
def_heapsize (reserve, commit)
     int reserve;
     int commit;
{
  char b[200];
  if (commit > 0)
    sprintf (b, "-heap 0x%x,0x%x ", reserve, commit);
  else
    sprintf (b, "-heap 0x%x ", reserve);
  new_directive (xstrdup (b));
}

void
def_stacksize (reserve, commit)
     int reserve;
     int commit;
{
  char b[200];
  if (commit > 0)
    sprintf (b, "-stack 0x%x,0x%x ", reserve, commit);
  else
    sprintf (b, "-stack 0x%x ", reserve);
  new_directive (xstrdup (b));
}

/*  append_import() simply adds the given import definition
   to the global import_list.  It is used by def_import().
 */
void 
append_import (symbol_name, dll_name, func_ordinal)
     char *symbol_name;
     char *dll_name;
     char *func_ordinal;
  { 
    iheadtype *headptr;

    if (import_list == NULL) 
      { 
        import_list = xmalloc (sizeof (iheadtype));
        import_list->dllname  = xstrdup (dll_name);
        import_list->nfuncs   = 1;
        import_list->funchead = xmalloc (sizeof (ifunctype));
        import_list->functail = import_list->funchead;
        import_list->next     = NULL;
        import_list->functail->name = xstrdup (symbol_name);
        import_list->functail->ord  = atoi (func_ordinal);
        import_list->functail->next = NULL;
        return;
      } /* END of case import_list == NULL */
    headptr = import_list;
    while ((strcmp (headptr->dllname,dll_name)) 
           && (headptr->next != NULL))
      headptr = headptr->next; 
    if (!strcmp (headptr->dllname, dll_name)) 
      { 
        headptr->functail->next = xmalloc (sizeof (ifunctype));
        headptr->functail = headptr->functail->next;
        headptr->functail->ord  = atoi (func_ordinal);
        headptr->functail->name = xstrdup (symbol_name);
        headptr->functail->next = NULL;
        headptr->nfuncs++;
      } 
    else 
      { /* this dll doesn't already have entry */
        headptr->next = xmalloc (sizeof (iheadtype));
        headptr = headptr->next;
        headptr->dllname  = xstrdup (dll_name);
        headptr->nfuncs   = 1;
        headptr->funchead = xmalloc (sizeof (ifunctype));
        headptr->functail = headptr->funchead;
        headptr->next     = NULL;
        headptr->functail->name = xstrdup (symbol_name);
        headptr->functail->ord  = atoi (func_ordinal);
        headptr->functail->next = NULL;
      } /* END of if..else clause */
  } /* END of function append_import */

/*  def_import() is called from within defparse.y when an
   IMPORT declaration is encountered.  Depending on the
   form of the declaration, the module name may or may not
   need ".dll" to be appended to it, the name of the func-
   tion may be stored in internal or entry, and there may
   or may not be an ordinal value associated with it.  
   The interface between def_import() and append_import()
   is a bit convoluted because append_import() was written
   to handle a simpler case of IMPORT declaration and I 
   didn't have the time to rewrite it.
 */

/* A note regarding the parse modes:
   In yyparse.y we have to accept import declarations which
   follow any one of the following forms:
     <func_name_in_app> = <dll_name>.<func_name_in_dll>
     <func_name_in_app> = <dll_name>.<number>
     <dll_name>.<func_name_in_dll>
     <dll_name>.<number>
   Furthermore, the dll's name may or may not end with ".dll",
   which complicates the parsing a little.  Normally the dll's
   name is passed to def_import() in the "module" parameter,
   but when it ends with ".dll" it gets passed in "module" sans
   ".dll" and that needs to be reappended.

  def_import() gets five parameters:
  app_name - the name of the function in the application, if 
             present, or NULL if not present.
  module   - the name of the dll, possibly sans extension (ie, '.dll').
  dllext   - the extension of the dll, if present, NULL if not present.
  entry    - the name of the function in the dll, if present, or NULL.
  ord_val  - the numerical tag of the function in the dll, if present, 
             or NULL.  Exactly one of <entry> or <ord_val> must be 
             present (ie, not NULL).
 */

void 
def_import (app_name, module, dllext, entry, ord_val)
     char *app_name;
     char *module;
     char *dllext;
     char *entry;
     int   ord_val; /* two-byte value */
  { 
    char *application_name;
    char *module_name;
    char *entry_name;
    char  ord_string[7];
    char  zero_str[1] = { 0 };
    
    sprintf (ord_string, "%d", ord_val);  
    if (entry)
      application_name = entry;
    else
      if (app_name)
        application_name = app_name;
      else
        application_name = zero_str;
    if (dllext)
      {
        module_name = (char*) alloca (strlen (module) + strlen(dllext) + 2);
        sprintf (module_name, "%s.%s", module, dllext);
      }
    else
      module_name = module;
    entry_name = ord_string;
    append_import (application_name, module_name, entry_name); 
  } /* END of function def_import */

void
def_version (major, minor)
     int major;
     int minor;
{
  printf ("VERSION %d.%d\n", major, minor);
}

void
def_section (name, attr)
     const char *name;
     int attr;
{
  char buf[200];
  char atts[5];
  char *d = atts;
  if (attr & 1)
    *d++ = 'R';

  if (attr & 2)
    *d++ = 'W';
  if (attr & 4)
    *d++ = 'X';
  if (attr & 8)
    *d++ = 'S';
  *d++ = 0;
  sprintf (buf, "-attr %s %s", name, atts);
  new_directive (xstrdup (buf));
}

void
def_code (attr)
     int attr;
{

  def_section ("CODE", attr);
}

void
def_data (attr)
     int attr;
{
  def_section ("DATA", attr);
}

/**********************************************************************/

static void
run (what, args)
     const char *what;
     char *args;
{
  char *s;
  int pid, wait_status;
  int i;
  const char **argv;
  char *errmsg_fmt, *errmsg_arg;
  char *temp_base = choose_temp_base ();

  if (verbose)
    fprintf (stderr, "%s %s\n", what, args);

  /* Count the args */
  i = 0;
  for (s = args; *s; s++)
    if (*s == ' ')
      i++;
  i++;
  argv = alloca (sizeof (char *) * (i + 3));
  i = 0;
  argv[i++] = what;
  s = args;
  while (1)
    {
      argv[i++] = s;
      while (*s != ' ' && *s != 0)
	s++;
      if (*s == 0)
	break;
      *s++ = 0;
    }
  argv[i++] = NULL;

  pid = pexecute (argv[0], (char * const *) argv, program_name, temp_base,
		  &errmsg_fmt, &errmsg_arg, PEXECUTE_ONE | PEXECUTE_SEARCH);

  if (pid == -1)
    {
      int errno_val = errno;

      fprintf (stderr, "%s: ", program_name);
      fprintf (stderr, errmsg_fmt, errmsg_arg);
      fprintf (stderr, ": %s\n", strerror (errno_val));
      exit (1);
    }

  pid = pwait (pid, &wait_status, 0);
  if (pid == -1)
    {
      fprintf (stderr, _("%s: wait: %s\n"), program_name, strerror (errno));
      exit (1);
    }
  else if (WIFSIGNALED (wait_status))
    {
      fprintf (stderr, _("%s: subprocess got fatal signal %d\n"),
	       program_name, WTERMSIG (wait_status));
      exit (1);
    }
  else if (WIFEXITED (wait_status))
    {
      if (WEXITSTATUS (wait_status) != 0)
	fprintf (stderr, _("%s: %s exited with status %d\n"),
		 program_name, what, WEXITSTATUS (wait_status));
    }
  else
    abort ();
}

/* read in and block out the base relocations */
static void
basenames (abfd)
     bfd *abfd;
{
}

static void
scan_open_obj_file (abfd)
     bfd *abfd;
{
  /* Look for .drectve's */
  asection *s = bfd_get_section_by_name (abfd, ".drectve");
  if (s)
    {
      int size = bfd_get_section_size_before_reloc (s);
      char *buf = xmalloc (size);
      char *p;
      char *e;
      bfd_get_section_contents (abfd, s, buf, 0, size);
      if (verbose)
	fprintf (stderr, _("%s: Sucking in info from %s\n"),
		 program_name,
		 bfd_get_filename (abfd));

      /* Search for -export: strings */
      p = buf;
      e = buf + size;
      while (p < e)
	{
	  if (p[0] == '-'
	      && strncmp (p, "-export:", 8) == 0)
	    {
	      char *name;
	      char *c;
	      p += 8;
	      name = p;
	      while (p < e && *p != ' ' && *p != '-')
		p++;
	      c = xmalloc (p - name + 1);
	      memcpy (c, name, p - name);
	      c[p - name] = 0;
	      /* FIXME: The 5th arg is for the `constant' field.
		 What should it be?  Not that it matters since it's not
		 currently useful.  */
	      def_exports (c, 0, -1, 0, 0, 0);
	    }
	  else
	    p++;
	}
      free (buf);
    }

  basenames (abfd);

  if (verbose)
    fprintf (stderr, _("%s: Done readin\n"),
	     program_name);
}

static void
scan_obj_file (filename)
     const char *filename;
{
  bfd *f = bfd_openr (filename, 0);

  if (!f)
    {
      fprintf (stderr, _("%s: Unable to open object file %s\n"),
	       program_name,
	       filename);
      exit (1);
    }
  if (bfd_check_format (f, bfd_archive))
    {
      bfd *arfile = bfd_openr_next_archived_file (f, 0);
      while (arfile)
	{
	  if (bfd_check_format (arfile, bfd_object))
	    scan_open_obj_file (arfile);
	  bfd_close (arfile);
	  arfile = bfd_openr_next_archived_file (f, arfile);
	}
    }
  else if (bfd_check_format (f, bfd_object))
    {
      scan_open_obj_file (f);
    }

  bfd_close (f);
}

/**********************************************************************/

static void
dump_def_info (f)
     FILE *f;
{
  int i;
  export_type *exp;
  fprintf (f, "%s ", ASM_C);
  for (i = 0; oav[i]; i++)
    fprintf (f, "%s ", oav[i]);
  fprintf (f, "\n");
  for (i = 0, exp = d_exports; exp; i++, exp = exp->next)
    {
      fprintf (f, "%s  %d = %s %s @ %d %s%s%s\n",
	       ASM_C,
	       i,
	       exp->name,
	       exp->internal_name,
	       exp->ordinal,
	       exp->noname ? "NONAME " : "",
	       exp->constant ? "CONSTANT" : "",
	       exp->data ? "DATA" : "");
    }
}

/* Generate the .exp file */

static int
sfunc (a, b)
     const void *a;
     const void *b;
{
  return *(const long *) a - *(const long *) b;
}

static void
flush_page (f, need, page_addr, on_page)
     FILE *f;
     long *need;
     int page_addr;
     int on_page;
{
  int i;

  /* Flush this page */
  fprintf (f, "\t%s\t0x%08x\t%s Starting RVA for chunk\n",
	   ASM_LONG,
	   page_addr,
	   ASM_C);
  fprintf (f, "\t%s\t0x%x\t%s Size of block\n",
	   ASM_LONG,
	   (on_page * 2) + (on_page & 1) * 2 + 8,
	   ASM_C);
  for (i = 0; i < on_page; i++)
    {
      fprintf (f, "\t%s\t0x%lx\n", ASM_SHORT, (need[i] - page_addr) | 0x3000);
    }
  /* And padding */
  if (on_page & 1)
    fprintf (f, "\t%s\t0x%x\n", ASM_SHORT, 0 | 0x0000);
}

static void
gen_def_file ()
{
  int i;
  export_type *exp;

  fprintf (output_def, ";");
  for (i = 0; oav[i]; i++)
    fprintf (output_def, " %s", oav[i]);

  fprintf (output_def, "\nEXPORTS\n");

  for (i = 0, exp = d_exports; exp; i++, exp = exp->next)
    {
      char *quote = strchr (exp->name, '.') ? "\"" : "";
      fprintf (output_def, "\t%s%s%s @ %d%s%s ; %s\n",
	       quote,
	       exp->name,
	       quote,
	       exp->ordinal,
	       exp->noname ? " NONAME" : "",
	       exp->data ? " DATA" : "",
	       cplus_demangle (exp->internal_name, DMGL_ANSI | DMGL_PARAMS));
    }
}

/*  generate_idata_ofile() generates the portable assembly source code
    for the idata sections.  It may be passed an open FILE* or a NULL.  
    In the former case it appends the source code to the end of the 
    file and returns NULL.  In the latter case it creates a file named
    doi.s, assembles it to doi.o, opens doi.o as a bfd, and returns the
    bfd*.  generate_idata_ofile() is currently used in the former manner
    in gen_exp_file().
 */
 
bfd * 
generate_idata_ofile ( fd )
 FILE *fd;
 {
   FILE      *filvar;
   int        result;
   iheadtype *headptr;
   ifunctype *funcptr;
   int        headindex;
   int        funcindex;
   char       as_args[16];
   
   if (fd != NULL)
     filvar = fd;
   else 
     filvar = fopen ("doi.s", "w");
   if (!filvar) 
     {
        fprintf (stderr, "%s: Can't open doi.s\n", program_name);
        return ((bfd*)-1);
     }
   fprintf (filvar, "%s Import data sections\n", ASM_C);
   fprintf (filvar, "\n\t.section\t.idata$2\n");
   fprintf (filvar, "\t%s\tdoi_idata\n", ASM_GLOBAL);
   fprintf (filvar, "doi_idata:\n");
 
   nheads = 0;
   for (headptr = import_list; headptr != NULL; headptr = headptr->next)
    {
       fprintf (filvar, "\t%slistone%d%s\t%s %s\n",
                ASM_RVA_BEFORE, (int)nheads, ASM_RVA_AFTER,
                ASM_C, headptr->dllname);
       fprintf (filvar, "\t%s\t0\n", ASM_LONG);
       fprintf (filvar, "\t%s\t0\n", ASM_LONG);
       fprintf (filvar, "\t%sdllname%d%s\n", 
                ASM_RVA_BEFORE, (int)nheads, ASM_RVA_AFTER);
       fprintf (filvar, "\t%slisttwo%d%s\n\n", 
                ASM_RVA_BEFORE, (int)nheads, ASM_RVA_AFTER);
       nheads++;  
    } /* END of headptr for-loop */
 
   fprintf (filvar, "\t%s\t0\n", ASM_LONG); /* NULL record at */
   fprintf (filvar, "\t%s\t0\n", ASM_LONG); /* end of idata$2 */
   fprintf (filvar, "\t%s\t0\n", ASM_LONG); /* section        */
   fprintf (filvar, "\t%s\t0\n", ASM_LONG);
   fprintf (filvar, "\t%s\t0\n", ASM_LONG);
 
   fprintf (filvar, "\n\t.section\t.idata$4\n");
   headindex = 0; 
   for (headptr = import_list; headptr != NULL; headptr = headptr->next)
     {
       fprintf (filvar, "listone%d:\n", headindex);
       for ( funcindex = 0; funcindex < headptr->nfuncs; funcindex++ )
         fprintf (filvar, "\t%sfuncptr%d_%d%s\n",
                  ASM_RVA_BEFORE, headindex, funcindex, ASM_RVA_AFTER);
       fprintf (filvar,"\t%s\t0\n", ASM_LONG); /* NULL terminating list */
       headindex++;
     } /* END of headptr for loop */
 
   fprintf (filvar, "\n\t.section\t.idata$5\n");
   headindex = 0; 
   for (headptr = import_list; headptr != NULL; headptr = headptr->next)
     {
       fprintf (filvar, "listtwo%d:\n", headindex);
       for ( funcindex = 0; funcindex < headptr->nfuncs; funcindex++ )
         fprintf (filvar, "\t%sfuncptr%d_%d%s\n",
                  ASM_RVA_BEFORE, headindex, funcindex, ASM_RVA_AFTER);
       fprintf (filvar,"\t%s\t0\n", ASM_LONG); /* NULL terminating list */
       headindex++;
     } /* END of headptr for-loop */
 
   fprintf (filvar, "\n\t.section\t.idata$6\n");
   headindex = 0;
   for (headptr = import_list; headptr != NULL; headptr = headptr->next)
     {
       funcindex = 0;
       for (funcptr = headptr->funchead; funcptr != NULL; 
            funcptr = funcptr->next)
         {
           fprintf (filvar,"funcptr%d_%d:\n",headindex,funcindex);
           fprintf (filvar,"\t%s\t%d\n",ASM_SHORT,((funcptr->ord) & 0xFFFF));
           fprintf (filvar,"\t%s\t%c%s%c\n",ASM_TEXT,'"',funcptr->name,'"');
           fprintf (filvar,"\t%s\t0\n",ASM_BYTE);
           funcindex++; 
          } /* END of funcptr for loop */
       headindex++;
      } /* END of headptr for loop */
 
   fprintf (filvar, "\n\t.section\t.idata$7\n");
   headindex = 0;
   for (headptr = import_list; headptr != NULL; headptr = headptr->next)
     {
       fprintf (filvar,"dllname%d:\n",headindex);
       fprintf (filvar,"\t%s\t%c%s%c\n",ASM_TEXT,'"',headptr->dllname,'"');
       fprintf (filvar,"\t%s\t0\n",ASM_BYTE);
       headindex++;
     } /* END of headptr for loop */
 
   if (fd == NULL) 
     {
       result = fclose (filvar);
       if ( result ) 
         {
           fprintf (stderr, "%s: Can't close doi.s\n", program_name);
           return ((bfd*) -1);
         } /* END of if clause */
       sprintf (as_args, "-o doi.o doi.s");
       run (as_name, as_args);
 
       if (dontdeltemps == 0)
         {
           sprintf (outfile, "doi.s");
           unlink  (outfile);         
          }
       return (bfd_openr ("doi.o", HOW_BFD_TARGET));  
      } /* END of if clause */
    else
      return NULL;
  } /* END of function generate_idata_ofile() */

static void
gen_exp_file ()
{
  FILE *f;
  int i;
  bfd *result;
  export_type *exp;
  dlist_type *dl;


  sprintf (outfile, "t%s", exp_name);

  if (verbose)
    fprintf (stderr, _("%s: Generate exp file %s\n"),
	     program_name, exp_name);

  f = fopen (outfile, FOPEN_WT);
  if (!f)
    {
      fprintf (stderr, _("%s: Unable to open output file %s\n"), program_name, outfile);
      exit (1);
    }
  if (verbose)
    {
      fprintf (stderr, _("%s: Opened file %s\n"),
	       program_name, outfile);
    }

  dump_def_info (f);
  if (d_exports)
    {
      fprintf (f, "\t.section	.edata\n\n");
      fprintf (f, "\t%s	0	%s Allways 0\n", ASM_LONG, ASM_C);
      fprintf (f, "\t%s	0x%lx	%s Time and date\n", ASM_LONG, (long) time(0),
	       ASM_C);
      fprintf (f, "\t%s	0	%s Major and Minor version\n", ASM_LONG, ASM_C);
      fprintf (f, "\t%sname%s	%s Ptr to name of dll\n", ASM_RVA_BEFORE, ASM_RVA_AFTER, ASM_C);
      fprintf (f, "\t%s	%d	%s Starting ordinal of exports\n", ASM_LONG, d_low_ord, ASM_C);


      fprintf (f, "\t%s	%d	%s Number of functions\n", ASM_LONG, d_high_ord - d_low_ord + 1, ASM_C);
      fprintf(f,"\t%s named funcs %d, low ord %d, high ord %d\n",
	      ASM_C,
	      d_named_nfuncs, d_low_ord, d_high_ord);
      fprintf (f, "\t%s	%d	%s Number of names\n", ASM_LONG,
	       show_allnames ? d_high_ord - d_low_ord + 1 : d_named_nfuncs, ASM_C);
      fprintf (f, "\t%safuncs%s  %s Address of functions\n", ASM_RVA_BEFORE, ASM_RVA_AFTER, ASM_C);

      fprintf (f, "\t%sanames%s	%s Address of Name Pointer Table\n", 
	       ASM_RVA_BEFORE, ASM_RVA_AFTER, ASM_C);

      fprintf (f, "\t%sanords%s	%s Address of ordinals\n", ASM_RVA_BEFORE, ASM_RVA_AFTER, ASM_C);

      fprintf (f, "name:	%s	\"%s\"\n", ASM_TEXT, dll_name);


      fprintf(f,"%s Export address Table\n", ASM_C);
      fprintf(f,"\t%s\n", ASM_ALIGN_LONG);
      fprintf (f, "afuncs:\n");
      i = d_low_ord;

      for (exp = d_exports; exp; exp = exp->next)
	{
	  if (exp->ordinal != i)
	    {
#if 0	      
	      fprintf (f, "\t%s\t%d\t%s %d..%d missing\n",
		       ASM_SPACE,
		       (exp->ordinal - i) * 4,
		       ASM_C,
		       i, exp->ordinal - 1);
	      i = exp->ordinal;
#endif
	      while (i < exp->ordinal)
		{
		  fprintf(f,"\t%s\t0\n", ASM_LONG);
		  i++;
		}
	    }
	  fprintf (f, "\t%s%s%s%s\t%s %d\n", ASM_RVA_BEFORE,
		   ASM_PREFIX,
		   exp->internal_name, ASM_RVA_AFTER, ASM_C, exp->ordinal);
	  i++;
	}

      fprintf (f,"%s Export Name Pointer Table\n", ASM_C);
      fprintf (f, "anames:\n");

      for (i = 0; (exp = d_exports_lexically[i]); i++)
	{
	  if (!exp->noname || show_allnames)
	    fprintf (f, "\t%sn%d%s\n", ASM_RVA_BEFORE, exp->ordinal, ASM_RVA_AFTER);
	}

      fprintf (f,"%s Export Oridinal Table\n", ASM_C);
      fprintf (f, "anords:\n");
      for (i = 0; (exp = d_exports_lexically[i]); i++)
	{
	  if (!exp->noname || show_allnames)
	    fprintf (f, "\t%s	%d\n", ASM_SHORT, exp->ordinal - d_low_ord);
	}

      fprintf(f,"%s Export Name Table\n", ASM_C);
      for (i = 0; (exp = d_exports_lexically[i]); i++)
	if (!exp->noname || show_allnames)
	  fprintf (f, "n%d:	%s	\"%s\"\n", exp->ordinal, ASM_TEXT, exp->name);

      if (a_list)
	{
	  fprintf (f, "\t.section .drectve\n");
	  for (dl = a_list; dl; dl = dl->next)
	    {
	      fprintf (f, "\t%s\t\"%s\"\n", ASM_TEXT, dl->text);
	    }
	}
      if (d_list)
	{
	  fprintf (f, "\t.section .rdata\n");
	  for (dl = d_list; dl; dl = dl->next)
	    {
	      char *p;
	      int l;
	      /* We dont output as ascii 'cause there can
	         be quote characters in the string */

	      l = 0;
	      for (p = dl->text; *p; p++)
		{
		  if (l == 0)
		    fprintf (f, "\t%s\t", ASM_BYTE);
		  else
		    fprintf (f, ",");
		  fprintf (f, "%d", *p);
		  if (p[1] == 0)
		    {
		      fprintf (f, ",0\n");
		      break;
		    }
		  if (++l == 10)
		    {
		      fprintf (f, "\n");
		      l = 0;
		    }
		}
	    }
	}
    }


  /* Add to the output file a way of getting to the exported names
     without using the import library. */
  if (add_indirect)
    {
      fprintf (f, "\t.section\t.rdata\n");
      for (i = 0, exp = d_exports; exp; i++, exp = exp->next)
	if (!exp->noname || show_allnames)
	  {
	    /* We use a single underscore for MS compatibility, and a
               double underscore for backward compatibility with old
               cygwin releases.  */
	    fprintf (f, "\t%s\t__imp_%s\n", ASM_GLOBAL, exp->name);
	    fprintf (f, "\t%s\t_imp__%s\n", ASM_GLOBAL, exp->name);
	    fprintf (f, "__imp_%s:\n", exp->name);
	    fprintf (f, "_imp__%s:\n", exp->name);
	    fprintf (f, "\t%s\t%s\n", ASM_LONG, exp->name);
	  }
    }

  /* Dump the reloc section if a base file is provided */
  if (base_file)
    {
      int addr;
      long need[PAGE_SIZE];
      long page_addr;
      int numbytes;
      int num_entries;
      long *copy;
      int j;
      int on_page;
      fprintf (f, "\t.section\t.init\n");
      fprintf (f, "lab:\n");

      fseek (base_file, 0, SEEK_END);
      numbytes = ftell (base_file);
      fseek (base_file, 0, SEEK_SET);
      copy = xmalloc (numbytes);
      fread (copy, 1, numbytes, base_file);
      num_entries = numbytes / sizeof (long);


      fprintf (f, "\t.section\t.reloc\n");
      if (num_entries)
	{
	  int src;
	  int dst = 0;
	  int last = -1;
	  qsort (copy, num_entries, sizeof (long), sfunc);
	  /* Delete duplcates */
	  for (src = 0; src < num_entries; src++)
	    {
	      if (last != copy[src]) 
		last = copy[dst++] = copy[src];
	    }
	  num_entries = dst;
	  addr = copy[0];
	  page_addr = addr & PAGE_MASK;		/* work out the page addr */
	  on_page = 0;
	  for (j = 0; j < num_entries; j++)
	    {
	      addr = copy[j];
	      if ((addr & PAGE_MASK) != page_addr)
		{
		  flush_page (f, need, page_addr, on_page);
		  on_page = 0;
		  page_addr = addr & PAGE_MASK;
		}
	      need[on_page++] = addr;
	    }
	  flush_page (f, need, page_addr, on_page);

/*	  fprintf (f, "\t%s\t0,0\t%s End\n", ASM_LONG, ASM_C);*/
	}
    }

    result = generate_idata_ofile (f);                    
    if ( result != NULL )                                 
      {                                                   
        fprintf (stderr, "%s: error writing idata section\n", 
                 program_name);                           
        exit (1);                                         
      }                                                   

  fclose (f);

  /* assemble the file */
  sprintf (outfile, "-o %s t%s", exp_name, exp_name);
  run (as_name, outfile);
  if (dontdeltemps == 0)
    {
      sprintf (outfile, "t%s", exp_name);
      unlink (outfile);
    }
}

static const char *
xlate (name)
     const char *name;
{
  if (add_underscore)
    {
      char *copy = xmalloc (strlen (name) + 2);
      copy[0] = '_';
      strcpy (copy + 1, name);
      name = copy;
    }

  if (killat)
    {
      char *p;
      p = strchr (name, '@');
      if (p)
	*p = 0;
    }
  return name;
}

/**********************************************************************/

static void
dump_iat (f, exp)
     FILE *f;
     export_type *exp;
{
  if (exp->noname && !show_allnames ) 
    {
      fprintf (f, "\t%s\t0x%08x\n",
	       ASM_LONG,
	       exp->ordinal | 0x80000000); /* hint or orindal ?? */
    }
  else
    {
      fprintf (f, "\t%sID%d%s\n", ASM_RVA_BEFORE,
	       exp->ordinal,
	       ASM_RVA_AFTER);
    }
}

typedef struct 
{
  int id;
  const char *name;
  int flags;
  int align;
  asection *sec;
  asymbol *sym;
  asymbol **sympp;
  int size;
  unsigned   char *data;
} sinfo;

#ifndef DLLTOOL_PPC

#define TEXT 0
#define DATA 1
#define BSS 2
#define IDATA7 3
#define IDATA5 4
#define IDATA4 5
#define IDATA6 6

#define NSECS 7

static sinfo secdata[NSECS] = 
{
  { TEXT,   ".text",    SEC_CODE | SEC_HAS_CONTENTS, 2},
  { DATA,   ".data",    SEC_DATA,                    2},
  { BSS,    ".bss",     0,                           2},
  { IDATA7, ".idata$7", SEC_HAS_CONTENTS,            2},
  { IDATA5, ".idata$5", SEC_HAS_CONTENTS,            2},
  { IDATA4, ".idata$4", SEC_HAS_CONTENTS,            2},
  { IDATA6, ".idata$6", SEC_HAS_CONTENTS,            1}
};

#else 

/* Sections numbered to make the order the same as other PowerPC NT    */
/* compilers. This also keeps funny alignment thingies from happening. */
#define TEXT   0
#define PDATA  1
#define RDATA  2
#define IDATA5 3
#define IDATA4 4
#define IDATA6 5
#define IDATA7 6
#define DATA   7
#define BSS    8

#define NSECS 9

static sinfo secdata[NSECS] = 
{
  { TEXT,   ".text",    SEC_CODE | SEC_HAS_CONTENTS, 3},
  { PDATA,  ".pdata",   SEC_HAS_CONTENTS,            2},
  { RDATA,  ".reldata", SEC_HAS_CONTENTS,            2},
  { IDATA5, ".idata$5", SEC_HAS_CONTENTS,            2},
  { IDATA4, ".idata$4", SEC_HAS_CONTENTS,            2},
  { IDATA6, ".idata$6", SEC_HAS_CONTENTS,            1},
  { IDATA7, ".idata$7", SEC_HAS_CONTENTS,            2},
  { DATA,   ".data",    SEC_DATA,                    2},
  { BSS,    ".bss",     0,                           2}
};

#endif

/*
This is what we're trying to make.  We generate the imp symbols with
both single and double underscores, for compatibility.

	.text
	.global	_GetFileVersionInfoSizeW@8
	.global	__imp_GetFileVersionInfoSizeW@8
_GetFileVersionInfoSizeW@8:
	jmp *	__imp_GetFileVersionInfoSizeW@8
	.section	.idata$7	# To force loading of head
	.long	__version_a_head
# Import Address Table
	.section	.idata$5
__imp_GetFileVersionInfoSizeW@8:
	.rva	ID2

# Import Lookup Table
	.section	.idata$4
	.rva	ID2
# Hint/Name table
	.section	.idata$6
ID2:	.short	2
	.asciz	"GetFileVersionInfoSizeW"


For the PowerPC, here's the variation on the above scheme:

# Rather than a simple "jmp *", the code to get to the dll function 
# looks like:
         .text
         lwz	r11,[tocv]__imp_function_name(r2)
#		   RELOC: 00000000 TOCREL16,TOCDEFN __imp_function_name
         lwz	r12,0(r11)
	 stw	r2,4(r1)
	 mtctr	r12
	 lwz	r2,4(r11)
	 bctr
*/

static char *
make_label (prefix, name)
     const char *prefix;
     const char *name;
{
  int len = strlen (ASM_PREFIX) + strlen (prefix) + strlen (name);
  char *copy = xmalloc (len +1 );
  strcpy (copy, ASM_PREFIX);
  strcat (copy, prefix);
  strcat (copy, name);
  return copy;
}

static bfd *
make_one_lib_file (exp, i)
     export_type *exp;
     int i;
{
  if (0)
    {
      FILE *f;
      char *prefix="d";
      sprintf (outfile, "%ss%d.s", prefix, i);
      f = fopen (outfile, FOPEN_WT);
      fprintf (f, "\t.text\n");
      fprintf (f, "\t%s\t%s%s\n", ASM_GLOBAL, ASM_PREFIX, exp->name);
      fprintf (f, "\t%s\t__imp_%s\n", ASM_GLOBAL, exp->name);
      fprintf (f, "\t%s\t_imp__%s\n", ASM_GLOBAL, exp->name);
      fprintf (f, "%s%s:\n\t%s\t__imp_%s\n", ASM_PREFIX,
	       exp->name, ASM_JUMP, exp->name);

      fprintf (f, "\t.section\t.idata$7\t%s To force loading of head\n", ASM_C);
      fprintf (f, "\t%s\t%s\n", ASM_LONG, head_label);


      fprintf (f,"%s Import Address Table\n", ASM_C);

      fprintf (f, "\t.section	.idata$5\n");
      fprintf (f, "__imp_%s:\n", exp->name);
      fprintf (f, "_imp__%s:\n", exp->name);

      dump_iat (f, exp);

      fprintf (f, "\n%s Import Lookup Table\n", ASM_C);
      fprintf (f, "\t.section	.idata$4\n");

      dump_iat (f, exp);

      if(!exp->noname || show_allnames) 
	{
	  fprintf (f, "%s Hint/Name table\n", ASM_C);
	  fprintf (f, "\t.section	.idata$6\n");
	  fprintf (f, "ID%d:\t%s\t%d\n", exp->ordinal, ASM_SHORT, exp->hint);      
	  fprintf (f, "\t%s\t\"%s\"\n", ASM_TEXT, xlate (exp->name));
	}

      fclose (f);


      sprintf (outfile, "-o %ss%d.o %ss%d.s", prefix, i, prefix, i);

      run (as_name, outfile);

    }
  else
    {

      bfd *abfd;

      asymbol *exp_label;
      asymbol *iname, *iname2;
      asymbol *iname_lab;
      asymbol **iname_lab_pp;
      asymbol **iname_pp;

      /* Extra Symbols for PPC */
#ifdef DLLTOOL_PPC
#define EXTRA 2     
#else
#define EXTRA 0
#endif

#ifdef DLLTOOL_PPC
      asymbol **fn_pp;
      asymbol **toc_pp;
#endif

      asymbol *ptrs[NSECS + 4 + EXTRA + 1];

      char *outname = xmalloc (10);
      int oidx = 0;
      sprintf (outname, "ds%d.o",  i);
      abfd = bfd_openw (outname, HOW_BFD_TARGET);
      if (!abfd)
	{
	  fprintf (stderr, _("%s: bfd_open failed open output file %s\n"), 
		   program_name, outname);
	  exit (1);
	}

      bfd_set_format (abfd, bfd_object);
      bfd_set_arch_mach (abfd, HOW_BFD_ARCH, 0);


      /* First make symbols for the sections */
      for (i = 0; i < NSECS; i++)
	{
	  sinfo *si = secdata + i;
	  if (si->id != i)
	    abort();
	  si->sec = bfd_make_section_old_way (abfd, si->name);
	  bfd_set_section_flags (abfd, 
				 si->sec,
				 si->flags);
	  
	  bfd_set_section_alignment(abfd, si->sec, si->align);
	  si->sec->output_section = si->sec;
	  si->sym = bfd_make_empty_symbol(abfd);
	  si->sym->name = si->sec->name;
	  si->sym->section = si->sec;
	  si->sym->flags = BSF_LOCAL;
	  si->sym->value = 0;
	  ptrs[oidx] = si->sym;
	  si->sympp = ptrs + oidx;
	  si->size = 0;
	  si->data = NULL;

	  oidx++;
	}

      if (! exp->data)
	{
	  exp_label = bfd_make_empty_symbol (abfd);
	  exp_label->name = make_label ("", exp->name);

	  /* On PowerPC, the function name points to a descriptor in
	     the rdata section, the first element of which is a
	     pointer to the code (..function_name), and the second
	     points to the .toc */
#ifdef DLLTOOL_PPC
	  if (machine == MPPC)
	    exp_label->section = secdata[RDATA].sec;
	  else
#endif
	    exp_label->section = secdata[TEXT].sec;

	  exp_label->flags = BSF_GLOBAL;
	  exp_label->value = 0;

	  ptrs[oidx++] = exp_label;
	}

      /* Generate imp symbols with one underscore for Microsoft
         compatibility, and with two underscores for backward
         compatibility with old versions of cygwin.  */
      iname = bfd_make_empty_symbol(abfd);
      iname->name = make_label ("__imp_", exp->name);
      iname->section = secdata[IDATA5].sec;
      iname->flags = BSF_GLOBAL;
      iname->value = 0;

      iname2 = bfd_make_empty_symbol(abfd);
      iname2->name = make_label ("_imp__", exp->name);
      iname2->section = secdata[IDATA5].sec;
      iname2->flags = BSF_GLOBAL;
      iname2->value = 0;

      iname_lab = bfd_make_empty_symbol(abfd);

      iname_lab->name = head_label;
      iname_lab->section = (asection *)&bfd_und_section;
      iname_lab->flags = 0;
      iname_lab->value = 0;


      iname_pp = ptrs + oidx;
      ptrs[oidx++] = iname;
      ptrs[oidx++] = iname2;

      iname_lab_pp = ptrs + oidx;
      ptrs[oidx++] = iname_lab;

#ifdef DLLTOOL_PPC
      /* The symbol refering to the code (.text) */
      {
	asymbol *function_name;

	function_name = bfd_make_empty_symbol(abfd);
	function_name->name = make_label ("..", exp->name);
	function_name->section = secdata[TEXT].sec;
	function_name->flags = BSF_GLOBAL;
	function_name->value = 0;

	fn_pp = ptrs + oidx;
	ptrs[oidx++] = function_name;
      }

      /* The .toc symbol */
      {
	asymbol *toc_symbol;    /* The .toc symbol */

	toc_symbol = bfd_make_empty_symbol(abfd);
	toc_symbol->name = make_label (".", "toc");
	toc_symbol->section = (asection *)&bfd_und_section;
	toc_symbol->flags = BSF_GLOBAL;
	toc_symbol->value = 0;

	toc_pp = ptrs + oidx;
	ptrs[oidx++] = toc_symbol;
      }
#endif

      ptrs[oidx] = 0;

      for (i = 0; i < NSECS; i++)
	{
	  sinfo *si = secdata + i;
	  asection *sec = si->sec;
	  arelent *rel;
	  arelent **rpp;

	  switch (i) 
	    {
	    case TEXT:
	      if (! exp->data)
		{
		  si->size = HOW_JTAB_SIZE;
		  si->data = xmalloc (HOW_JTAB_SIZE);
		  memcpy (si->data, HOW_JTAB, HOW_JTAB_SIZE);
	      
		  /* add the reloqc into idata$5 */
		  rel = xmalloc (sizeof (arelent));
		  rpp = xmalloc (sizeof (arelent *) * 2);
		  rpp[0] = rel;
		  rpp[1] = 0;
		  rel->address = HOW_JTAB_ROFF;
		  rel->addend = 0;

		  if (machine == MPPC)
		    {
		      rel->howto = bfd_reloc_type_lookup (abfd, 
							  BFD_RELOC_16_GOTOFF);
		      rel->sym_ptr_ptr = iname_pp;
		    }
		  else
		    {
		      rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_32);
		      rel->sym_ptr_ptr = secdata[IDATA5].sympp;
		    }
		  sec->orelocation = rpp;
		  sec->reloc_count = 1;
		}
	      break;
	    case IDATA4:
	    case IDATA5:
	      /* An idata$4 or idata$5 is one word long, and has an
		 rva to idata$6 */
	  
	      si->data = xmalloc (4);
	      si->size = 4;

	      if (exp->noname)
		{
		  si->data[0] = exp->ordinal ;
		  si->data[1] = exp->ordinal >> 8;
		  si->data[2] = exp->ordinal >> 16;
		  si->data[3] = 0x80;
		}
	      else 
		{
		  sec->reloc_count = 1;
		  memset (si->data, 0, si->size);
		  rel = xmalloc (sizeof (arelent));
		  rpp = xmalloc (sizeof (arelent *) * 2);
		  rpp[0] = rel;
		  rpp[1] = 0;
		  rel->address = 0;
		  rel->addend = 0;
		  rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_RVA);
		  rel->sym_ptr_ptr = secdata[IDATA6].sympp;
		  sec->orelocation = rpp;
		}

	      break;

	    case IDATA6:
	      if (!exp->noname) 
		{
		  /* This used to add 1 to exp->hint.  I don't know
                     why it did that, and it does not match what I see
                     in programs compiled with the MS tools.  */
		  int idx = exp->hint;
		  si->size = strlen (xlate (exp->name)) + 3;
		  si->data = xmalloc (si->size);
		  si->data[0] = idx & 0xff;
		  si->data[1] = idx >> 8;
		  strcpy (si->data + 2, xlate (exp->name));
		}
	      break;
	    case IDATA7:
	      si->size = 4;
	      si->data =xmalloc(4);
	      memset (si->data, 0, si->size);
	      rel = xmalloc (sizeof (arelent));
	      rpp = xmalloc (sizeof (arelent *) * 2);
	      rpp[0] = rel;
	      rel->address = 0;
	      rel->addend = 0;
	      rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_RVA);
	      rel->sym_ptr_ptr = iname_lab_pp;
	      sec->orelocation = rpp;
	      sec->reloc_count = 1;
	      break;

#ifdef DLLTOOL_PPC
	    case PDATA:
	      {
		/* The .pdata section is 5 words long. */
		/* Think of it as:                     */
		/* struct                              */
		/* {                                   */
		/*   bfd_vma BeginAddress,     [0x00]  */
		/*           EndAddress,       [0x04]  */
		/*	     ExceptionHandler, [0x08]  */
		/*	     HandlerData,      [0x0c]  */
		/*	     PrologEndAddress; [0x10]  */
		/* };                                  */

		/* So this pdata section setups up this as a glue linkage to
		   a dll routine. There are a number of house keeping things
		   we need to do:

		   1. In the name of glue trickery, the ADDR32 relocs for 0, 
		      4, and 0x10 are set to point to the same place: 
		      "..function_name". 
		   2. There is one more reloc needed in the pdata section. 
		      The actual glue instruction to restore the toc on 
		      return is saved as the offset in an IMGLUE reloc.
		      So we need a total of four relocs for this section.

		   3. Lastly, the HandlerData field is set to 0x03, to indicate
		      that this is a glue routine.
		*/
		arelent *imglue, *ba_rel, *ea_rel, *pea_rel;

		/* alignment must be set to 2**2 or you get extra stuff */
		bfd_set_section_alignment(abfd, sec, 2);

		si->size = 4 * 5;
		si->data =xmalloc(4 * 5);
		memset (si->data, 0, si->size);
		rpp = xmalloc (sizeof (arelent *) * 5);
		rpp[0] = imglue  = xmalloc (sizeof (arelent));
		rpp[1] = ba_rel  = xmalloc (sizeof (arelent));
		rpp[2] = ea_rel  = xmalloc (sizeof (arelent));
		rpp[3] = pea_rel = xmalloc (sizeof (arelent));
		rpp[4] = 0;

		/* stick the toc reload instruction in the glue reloc */
		bfd_put_32(abfd, ppc_glue_insn, (char *) &imglue->address);

		imglue->addend = 0;
		imglue->howto = bfd_reloc_type_lookup (abfd, 
						       BFD_RELOC_32_GOTOFF);
		imglue->sym_ptr_ptr = fn_pp;

		ba_rel->address = 0;
		ba_rel->addend = 0;
		ba_rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_32);
		ba_rel->sym_ptr_ptr = fn_pp;

		bfd_put_32(abfd, 0x18, si->data + 0x04);
		ea_rel->address = 4;
		ea_rel->addend = 0;
		ea_rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_32);
		ea_rel->sym_ptr_ptr = fn_pp;

		/* mark it as glue */
		bfd_put_32(abfd, 0x03, si->data + 0x0c);

		/* mark the prolog end address */
		bfd_put_32(abfd, 0x0D, si->data + 0x10);
		pea_rel->address = 0x10;
		pea_rel->addend = 0;
		pea_rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_32);
		pea_rel->sym_ptr_ptr = fn_pp;

		sec->orelocation = rpp;
		sec->reloc_count = 4;
		break;
	      }
	    case RDATA:
	      /* Each external function in a PowerPC PE file has a two word
		 descriptor consisting of:
		 1. The address of the code.
		 2. The address of the appropriate .toc
	         We use relocs to build this.
	      */

	      si->size = 8;
	      si->data = xmalloc (8);
	      memset (si->data, 0, si->size);

	      rpp = xmalloc (sizeof (arelent *) * 3);
	      rpp[0] = rel = xmalloc (sizeof (arelent));
	      rpp[1] = xmalloc (sizeof (arelent));
	      rpp[2] = 0;

	      rel->address = 0;
	      rel->addend = 0;
	      rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_32);
	      rel->sym_ptr_ptr = fn_pp;

	      rel = rpp[1];

	      rel->address = 4;
	      rel->addend = 0;
	      rel->howto = bfd_reloc_type_lookup (abfd, BFD_RELOC_32);
	      rel->sym_ptr_ptr = toc_pp;

	      sec->orelocation = rpp;
	      sec->reloc_count = 2;
	      break;
#endif /* DLLTOOL_PPC */
	    }
	}

      {
	bfd_vma vma = 0;
	/* Size up all the sections */
	for (i = 0; i < NSECS; i++)
	  {
	    sinfo *si = secdata + i;

	    bfd_set_section_size (abfd, si->sec, si->size);
	    bfd_set_section_vma (abfd, si->sec, vma);

/*	    vma += si->size;*/
	  }
      }
      /* Write them out */
      for (i = 0; i < NSECS; i++)
	{
	  sinfo *si = secdata + i;

	  if (i == IDATA5 && no_idata5)
	    continue;

	  if (i == IDATA4 && no_idata4)
	    continue;

	  bfd_set_section_contents (abfd, si->sec, 
				    si->data, 0,
				    si->size);
	}

      bfd_set_symtab (abfd, ptrs, oidx);
      bfd_close (abfd);
      abfd = bfd_openr (outname, HOW_BFD_TARGET);
      return abfd;
    }

}

static bfd *
make_head ()
{
  FILE *  f = fopen ("dh.s", FOPEN_WT);

  fprintf (f, "%s IMAGE_IMPORT_DESCRIPTOR\n", ASM_C);
  fprintf (f, "\t.section	.idata$2\n");

  fprintf(f,"\t%s\t%s\n", ASM_GLOBAL,head_label);

  fprintf (f, "%s:\n", head_label);

  fprintf (f, "\t%shname%s\t%sPtr to image import by name list\n",
	   ASM_RVA_BEFORE, ASM_RVA_AFTER, ASM_C);

  fprintf (f, "\t%sthis should be the timestamp, but NT sometimes\n", ASM_C);
  fprintf (f, "\t%sdoesn't load DLLs when this is set.\n", ASM_C);
  fprintf (f, "\t%s\t0\t%s loaded time\n", ASM_LONG, ASM_C);
  fprintf (f, "\t%s\t0\t%s Forwarder chain\n", ASM_LONG, ASM_C);
  fprintf (f, "\t%s__%s_iname%s\t%s imported dll's name\n",
	   ASM_RVA_BEFORE,
	   imp_name_lab,
	   ASM_RVA_AFTER,
	   ASM_C);
  fprintf (f, "\t%sfthunk%s\t%s pointer to firstthunk\n",
	   ASM_RVA_BEFORE,
	   ASM_RVA_AFTER, ASM_C);

  fprintf (f, "%sStuff for compatibility\n", ASM_C);

  if (!no_idata5) 
    {
      fprintf (f, "\t.section\t.idata$5\n");
      fprintf (f, "\t%s\t0\n", ASM_LONG);
      fprintf (f, "fthunk:\n");
    }
  if (!no_idata4) 
    {
      fprintf (f, "\t.section\t.idata$4\n");

      fprintf (f, "\t%s\t0\n", ASM_LONG);
      fprintf (f, "\t.section	.idata$4\n");
      fprintf (f, "hname:\n");
    }
  fclose (f);

  sprintf (outfile, "-o dh.o dh.s");
  run (as_name, outfile);

  return  bfd_openr ("dh.o", HOW_BFD_TARGET);  
}

static bfd * 
make_tail ()
{
  FILE *  f = fopen ("dt.s", FOPEN_WT);

  if (!no_idata4) 
    {
      fprintf (f, "\t.section	.idata$4\n");
      fprintf (f, "\t%s\t0\n", ASM_LONG);
    }
  if (!no_idata5) 
    {
      fprintf (f, "\t.section	.idata$5\n");
      fprintf (f, "\t%s\t0\n", ASM_LONG);
    }

#ifdef DLLTOOL_PPC
  /* Normally, we need to see a null descriptor built in idata$3 to
     act as the terminator for the list. The ideal way, I suppose,
     would be to mark this section as a comdat type 2 section, so
     only one would appear in the final .exe (if our linker supported
     comdat, that is) or cause it to be inserted by something else (say
     crt0)
  */

  fprintf (f, "\t.section	.idata$3\n");
  fprintf (f, "\t%s\t0\n", ASM_LONG);
  fprintf (f, "\t%s\t0\n", ASM_LONG);
  fprintf (f, "\t%s\t0\n", ASM_LONG);
  fprintf (f, "\t%s\t0\n", ASM_LONG);
  fprintf (f, "\t%s\t0\n", ASM_LONG);
#endif

#ifdef DLLTOOL_PPC
  /* Other PowerPC NT compilers use idata$6 for the dllname, so I
     do too. Original, huh? */
  fprintf (f, "\t.section	.idata$6\n");
#else
  fprintf (f, "\t.section	.idata$7\n");
#endif

  fprintf (f, "\t%s\t__%s_iname\n", ASM_GLOBAL, imp_name_lab);
  fprintf (f, "__%s_iname:\t%s\t\"%s\"\n",
	   imp_name_lab, ASM_TEXT, dll_name);

  fclose (f);

  sprintf (outfile, "-o dt.o dt.s");
  run (as_name, outfile);
  return  bfd_openr ("dt.o", HOW_BFD_TARGET);  
}

static void
gen_lib_file ()
{
  int i;
  export_type *exp;
  bfd *ar_head;
  bfd *ar_tail;
  bfd *outarch;
  bfd * head  = 0;

  unlink (imp_name);

  outarch = bfd_openw (imp_name, HOW_BFD_TARGET);

  if (!outarch)
    {
      fprintf (stderr, _("%s: Can't open .lib file %s\n"),
	       program_name, imp_name);
      exit (1);
    }
  bfd_set_format (outarch, bfd_archive);
  outarch->has_armap = 1;

  /* Work out a reasonable size of things to put onto one line. */



  ar_head = make_head ();
  ar_tail = make_tail();

  for (i = 0; (exp = d_exports_lexically[i]); i++)
    {
      bfd *n = make_one_lib_file (exp, i);
      n->next = head;
      head = n;
    }


  /* Now stick them all into the archive */

  ar_head->next = head;
  ar_tail->next = ar_head;
  head = ar_tail;

  if (! bfd_set_archive_head (outarch, head))
    bfd_fatal ("bfd_set_archive_head");
  if (! bfd_close (outarch))
    bfd_fatal (imp_name);

  while (head != NULL)
    {
      bfd *n = head->next;
      bfd_close (head);
      head = n;
    }

  /* Delete all the temp files */

  if (dontdeltemps == 0)
    {
      sprintf (outfile, "dh.o");
      unlink (outfile);
      sprintf (outfile, "dh.s");
      unlink (outfile);
      sprintf (outfile, "dt.o");
      unlink (outfile);
      sprintf (outfile, "dt.s");
      unlink (outfile);
    }

  if (dontdeltemps < 2)
    {
      for (i = 0, exp = d_exports; exp; i++, exp = exp->next)
	{
	  sprintf (outfile, "ds%d.o",i);
	  if (unlink (outfile) < 0)
	    fprintf (stderr, _("%s: cannot delete %s: %s\n"), program_name,
		     outfile, strerror (errno));
	}
    }
}

/**********************************************************************/

/* Run through the information gathered from the .o files and the
   .def file and work out the best stuff */
static int
pfunc (a, b)
     const void *a;
     const void *b;
{
  export_type *ap = *(export_type **) a;
  export_type *bp = *(export_type **) b;
  if (ap->ordinal == bp->ordinal)
    return 0;

  /* unset ordinals go to the bottom */
  if (ap->ordinal == -1)
    return 1;
  if (bp->ordinal == -1)
    return -1;
  return (ap->ordinal - bp->ordinal);
}

static int
nfunc (a, b)
     const void *a;
     const void *b;
{
  export_type *ap = *(export_type **) a;
  export_type *bp = *(export_type **) b;

  return (strcmp (ap->name, bp->name));
}

static void
remove_null_names (ptr)
     export_type **ptr;
{
  int src;
  int dst;
  for (dst = src = 0; src < d_nfuncs; src++)
    {
      if (ptr[src])
	{
	  ptr[dst] = ptr[src];
	  dst++;
	}
    }
  d_nfuncs = dst;
}

static void
dtab (ptr)
     export_type **ptr;
{
#ifdef SACDEBUG
  int i;
  for (i = 0; i < d_nfuncs; i++)
    {
      if (ptr[i])
	{
	  printf ("%d %s @ %d %s%s%s\n",
		  i, ptr[i]->name, ptr[i]->ordinal,
		  ptr[i]->noname ? "NONAME " : "",
		  ptr[i]->constant ? "CONSTANT" : "",
		  ptr[i]->data ? "DATA" : "");
	}
      else
	printf ("empty\n");
    }
#endif
}

static void
process_duplicates (d_export_vec)
     export_type **d_export_vec;
{
  int more = 1;
  int i;  
  while (more)
    {

      more = 0;
      /* Remove duplicates */
      qsort (d_export_vec, d_nfuncs, sizeof (export_type *), nfunc);

      dtab (d_export_vec);
      for (i = 0; i < d_nfuncs - 1; i++)
	{
	  if (strcmp (d_export_vec[i]->name,
		      d_export_vec[i + 1]->name) == 0)
	    {

	      export_type *a = d_export_vec[i];
	      export_type *b = d_export_vec[i + 1];

	      more = 1;
	      if (verbose)
		fprintf (stderr, _("Warning, ignoring duplicate EXPORT %s %d,%d\n"),
			 a->name,
			 a->ordinal,
			 b->ordinal);
	      if (a->ordinal != -1
		  && b->ordinal != -1)
		{

		  fprintf (stderr, _("Error, duplicate EXPORT with oridinals %s\n"),
			   a->name);
		  exit (1);
		}
	      /* Merge attributes */
	      b->ordinal = a->ordinal > 0 ? a->ordinal : b->ordinal;
	      b->constant |= a->constant;
	      b->noname |= a->noname;
	      b->data |= a->data;
	      d_export_vec[i] = 0;
	    }

	  dtab (d_export_vec);
	  remove_null_names (d_export_vec);
	  dtab (d_export_vec);
	}
    }


  /* Count the names */
  for (i = 0; i < d_nfuncs; i++)
    {
      if (!d_export_vec[i]->noname)
	d_named_nfuncs++;
    }
}

static void
fill_ordinals (d_export_vec)
     export_type **d_export_vec;
{
  int lowest = -1;
  int i;
  char *ptr;
  int size = 65536;

  qsort (d_export_vec, d_nfuncs, sizeof (export_type *), pfunc);

  /* fill in the unset ordinals with ones from our range */

  ptr = (char *) xmalloc (size);

  memset (ptr, 0, size);

  /* Mark in our large vector all the numbers that are taken */
  for (i = 0; i < d_nfuncs; i++)
    {
      if (d_export_vec[i]->ordinal != -1)
	{
	  ptr[d_export_vec[i]->ordinal] = 1;
	  if (lowest == -1 || d_export_vec[i]->ordinal < lowest)
	    {
	      lowest = d_export_vec[i]->ordinal;
	    }
	}
    }

  /* Start at 1 for compatibility with MS toolchain.  */
  if (lowest == -1)
    lowest = 1;

  /* Now fill in ordinals where the user wants us to choose. */
  for (i = 0; i < d_nfuncs; i++)
    {
      if (d_export_vec[i]->ordinal == -1)
	{
	  register int j;

	  /* First try within or after any user supplied range. */
	  for (j = lowest; j < size; j++)
	    if (ptr[j] == 0)
	      {
		ptr[j] = 1;
		d_export_vec[i]->ordinal = j;
		goto done;
	      }

	  /* Then try before the range. */
	  for (j = lowest; j >0; j--)
	    if (ptr[j] == 0)
	      {
		ptr[j] = 1;
		d_export_vec[i]->ordinal = j;
		goto done;
	      }
	done:;
	}
    }

  free (ptr);

  /* And resort */

  qsort (d_export_vec, d_nfuncs, sizeof (export_type *), pfunc);

  /* Work out the lowest and highest ordinal numbers.  */
  if (d_nfuncs) 
    {
      if (d_export_vec[0])
	d_low_ord = d_export_vec[0]->ordinal;
      if (d_export_vec[d_nfuncs-1])
	d_high_ord = d_export_vec[d_nfuncs-1]->ordinal;
    }
}

static int
alphafunc (av,bv)
     const void *av;
     const void *bv;
{
  const export_type **a = (const export_type **) av;
  const export_type **b = (const export_type **) bv;

  return strcmp ((*a)->name, (*b)->name);
}

static void
mangle_defs ()
{
  /* First work out the minimum ordinal chosen */

  export_type *exp;

  int i;
  int hint = 0;
  export_type **d_export_vec
  = (export_type **) xmalloc (sizeof (export_type *) * d_nfuncs);

  for (i = 0, exp = d_exports; exp; i++, exp = exp->next)
    {
      d_export_vec[i] = exp;
    }

  process_duplicates (d_export_vec);
  fill_ordinals (d_export_vec);

  /* Put back the list in the new order */
  d_exports = 0;
  for (i = d_nfuncs - 1; i >= 0; i--)
    {
      d_export_vec[i]->next = d_exports;
      d_exports = d_export_vec[i];
    }

  /* Build list in alpha order */
  d_exports_lexically = (export_type **)xmalloc (sizeof(export_type *)*(d_nfuncs+1));

  for (i = 0, exp = d_exports; exp; i++, exp = exp->next)
    {
      d_exports_lexically[i] = exp;
    }
  d_exports_lexically[i] = 0;

  qsort (d_exports_lexically, i, sizeof (export_type *), alphafunc);

  /* Fill exp entries with their hint values */
  
  for (i = 0; i < d_nfuncs; i++)
    {
      if (!d_exports_lexically[i]->noname || show_allnames)
	d_exports_lexically[i]->hint = hint++;
    }

}

/**********************************************************************/

static void
usage (file, status)
     FILE *file;
     int status;
{
  fprintf (file, _("Usage %s <options> <object-files>\n"), program_name);
  fprintf (file, _("   --machine <machine>\n"));
  fprintf (file, _("   --output-exp <outname> Generate export file.\n"));
  fprintf (file, _("   --output-lib <outname> Generate input library.\n"));
  fprintf (file, _("   --add-indirect         Add dll indirects to export file.\n"));
  fprintf (file, _("   --dllname <name>       Name of input dll to put into output lib.\n"));
  fprintf (file, _("   --def <deffile>        Name input .def file\n"));
  fprintf (file, _("   --output-def <deffile> Name output .def file\n"));
  fprintf (file, _("   --base-file <basefile> Read linker generated base file\n"));
  fprintf (file, _("   --no-idata4           Don't generate idata$4 section\n"));
  fprintf (file, _("   --no-idata5           Don't generate idata$5 section\n"));
  fprintf (file, _("   -v                     Verbose\n"));
  fprintf (file, _("   -U                     Add underscores to .lib\n"));
  fprintf (file, _("   -k                     Kill @<n> from exported names\n"));
  fprintf (file, _("   --as <name>            Use <name> for assembler\n"));
  fprintf (file, _("   --nodelete             Keep temp files.\n"));
  exit (status);
}

#define OPTION_NO_IDATA4 'x'
#define OPTION_NO_IDATA5 'c'
static const struct option long_options[] =
{
  {"nodelete", no_argument, NULL, 'n'},
  {"dllname", required_argument, NULL, 'D'},
  {"no-idata4", no_argument, NULL, OPTION_NO_IDATA4},
  {"no-idata5", no_argument, NULL, OPTION_NO_IDATA5},
  {"output-exp", required_argument, NULL, 'e'},
  {"output-def", required_argument, NULL, 'z'},
  {"output-lib", required_argument, NULL, 'l'},
  {"def", required_argument, NULL, 'd'},
  {"add-underscore", no_argument, NULL, 'U'},
  {"killat", no_argument, NULL, 'k'},
  {"help", no_argument, NULL, 'h'},
  {"machine", required_argument, NULL, 'm'},
  {"add-indirect", no_argument, NULL, 'a'},
  {"base-file", required_argument, NULL, 'b'},
  {"as", required_argument, NULL, 'S'},
  {0}
};

int
main (ac, av)
     int ac;
     char **av;
{
  int c;
  int i;
  char *firstarg = 0;
  program_name = av[0];
  oav = av;

  setlocale (LC_MESSAGES, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  while ((c = getopt_long (ac, av, "xcz:S:R:A:puaD:l:e:nkvbUh?m:yd:", long_options, 0)) 
	 != EOF)
    {
      switch (c)
	{
	case OPTION_NO_IDATA4:
	  no_idata4 = 1;
	  break;
	case OPTION_NO_IDATA5:
	  no_idata5 = 1;
	  break;
	case 'S':
	  as_name = optarg;
	  break;

	  /* ignored for compatibility */
	case 'u':
	  break;
	case 'a':
	  add_indirect = 1;
	  break;
	case 'z':
	  output_def = fopen (optarg, FOPEN_WT);
	  break;
	case 'D':
	  dll_name = optarg;
	  break;
	case 'l':
	  imp_name = optarg;
	  break;
	case 'e':
	  exp_name = optarg;
	  break;
	case 'h':
	case '?':
	  usage (stderr, 0);
	  break;
	case 'm':
	  mname = optarg;
	  break;
	case 'v':
	  verbose = 1;
	  break;
	case 'y':
#if 0
	  /* We don't currently define YYDEBUG when building
             defparse.y.  */
	  yydebug = 1;
#endif
	  break;
	case 'U':
	  add_underscore = 1;
	  break;
	case 'k':
	  killat = 1;
	  break;
	case 'd':
	  def_file = optarg;
	  break;
	case 'n':
	  dontdeltemps++;
	  break;
	case 'b':
	  base_file = fopen (optarg, FOPEN_RB);
	  if (!base_file)
	    {
	      fprintf (stderr, _("%s: Unable to open base-file %s\n"),
		       av[0],
		       optarg);
	      exit (1);
	    }
	  break;
	default:
	  usage (stderr, 1);
	}
    }


  for (i = 0; mtable[i].type; i++)
    {
      if (strcmp (mtable[i].type, mname) == 0)
	break;
    }

  if (!mtable[i].type)
    {
      fprintf (stderr, _("Machine not supported\n"));
      exit (1);
    }
  machine = i;


  if (!dll_name && exp_name)
    {
      int len = strlen (exp_name) + 5;
      dll_name = xmalloc (len);
      strcpy (dll_name, exp_name);
      strcat (dll_name, ".dll");
    }

  if (def_file)
    {
      process_def_file (def_file);
    }
  while (optind < ac)
    {
      if (!firstarg)
	firstarg = av[optind];
      scan_obj_file (av[optind]);
      optind++;
    }

  mangle_defs ();

  if (exp_name)
    gen_exp_file ();
  if (imp_name)
    {
      /* Make imp_name safe for use as a label. */
      char *p;

      imp_name_lab = xstrdup (imp_name);
      for (p = imp_name_lab; *p; p++)
	{
	  if (!isalpha (*p) && !isdigit (*p))
	    *p = '_';
	}
      head_label = make_label("_head_", imp_name_lab);
      gen_lib_file ();
    }
  if (output_def)
    gen_def_file ();

  return 0;
}