path: root/bfd/coff-ppc.c

/* BFD back-end for PowerPC Microsoft Portable Executable files.
   Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.

   Original version pieced together by Kim Knuttila (krk@cygnus.com)

   There is nothing new under the sun. This file draws a lot on other
   coff files, in particular, those for the rs/6000, alpha, mips, and 
   intel backends, and the PE work for the arm.

This file is part of BFD, the Binary File Descriptor library.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Current State:
   - objdump works
   - relocs generated by gas
*/


#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "obstack.h"

#include "coff/powerpc.h"
#include "coff/internal.h"

#include "coff/pe.h"

#ifdef BADMAG
#undef BADMAG
#endif

#define BADMAG(x) PPCBADMAG(x)

#include "libcoff.h"

/* The nt loader points the toc register to &toc + 32768, in order to */
/* use the complete range of a 16-bit displacement (I guess). We have */
/* to adjust for this when we fix up loads displaced off the toc reg. */
#define TOC_LOAD_ADJUSTMENT (-32768)
#define TOC_SECTION_NAME ".private.toc"

/* The main body of code is in coffcode.h.  */

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)

/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
   from smaller values.  Start with zero, widen, *then* decrement.  */
#define MINUS_ONE	(((bfd_vma)0) - 1)

/* these should definitely go in a header file somewhere... */

/* NOP */
#define IMAGE_REL_PPC_ABSOLUTE          0x0000

/* 64-bit address */
#define IMAGE_REL_PPC_ADDR64            0x0001

/* 32-bit address */
#define IMAGE_REL_PPC_ADDR32            0x0002

/* 26-bit address, shifted left 2 (branch absolute) */
#define IMAGE_REL_PPC_ADDR24            0x0003

/* 16-bit address */
#define IMAGE_REL_PPC_ADDR16            0x0004

/* 16-bit address, shifted left 2 (load doubleword) */
#define IMAGE_REL_PPC_ADDR14            0x0005

/* 26-bit PC-relative offset, shifted left 2 (branch relative) */
#define IMAGE_REL_PPC_REL24             0x0006

/* 16-bit PC-relative offset, shifted left 2 (br cond relative) */
#define IMAGE_REL_PPC_REL14             0x0007

/* 16-bit offset from TOC base */
#define IMAGE_REL_PPC_TOCREL16          0x0008

/* 16-bit offset from TOC base, shifted left 2 (load doubleword) */
#define IMAGE_REL_PPC_TOCREL14          0x0009

/* 32-bit addr w/o image base */
#define IMAGE_REL_PPC_ADDR32NB          0x000A

/* va of containing section (as in an image sectionhdr) */
#define IMAGE_REL_PPC_SECREL            0x000B

/* sectionheader number */
#define IMAGE_REL_PPC_SECTION           0x000C

/* substitute TOC restore instruction iff symbol is glue code */
#define IMAGE_REL_PPC_IFGLUE            0x000D

/* symbol is glue code; virtual address is TOC restore instruction */
#define IMAGE_REL_PPC_IMGLUE            0x000E

/* va of containing section (limited to 16 bits) */
#define IMAGE_REL_PPC_SECREL16          0x000F

/* stuff to handle immediate data when the number of bits in the */
/* data is greater than the number of bits in the immediate field */
/* We need to do (usually) 32 bit arithmetic on 16 bit chunks */
#define IMAGE_REL_PPC_REFHI             0x0010
#define IMAGE_REL_PPC_REFLO             0x0011
#define IMAGE_REL_PPC_PAIR              0x0012


/*  Flag bits in IMAGE_RELOCATION.TYPE */

/* subtract reloc value rather than adding it */
#define IMAGE_REL_PPC_NEG               0x0100

/* fix branch prediction bit to predict branch taken */
#define IMAGE_REL_PPC_BRTAKEN           0x0200

/* fix branch prediction bit to predict branch not taken */
#define IMAGE_REL_PPC_BRNTAKEN          0x0400

/* toc slot defined in file (or, data in toc) */
#define IMAGE_REL_PPC_TOCDEFN           0x0800

/* masks to isolate above values in IMAGE_RELOCATION.Type */
#define IMAGE_REL_PPC_TYPEMASK          0x00FF
#define IMAGE_REL_PPC_FLAGMASK          0x0F00

#define EXTRACT_TYPE(x)                 ((x) & IMAGE_REL_PPC_TYPEMASK)
#define EXTRACT_FLAGS(x) ((x) & IMAGE_REL_PPC_FLAGMASK)
#define EXTRACT_JUNK(x)  \
           ((x) & ~(IMAGE_REL_PPC_TYPEMASK | IMAGE_REL_PPC_FLAGMASK))


/* static helper functions to make relocation work */
/* (Work In Progress) */

static bfd_reloc_status_type ppc_refhi_reloc PARAMS ((bfd *abfd,
						      arelent *reloc,
						      asymbol *symbol,
						      PTR data,
						      asection *section,
						      bfd *output_bfd,
						      char **error));
static bfd_reloc_status_type ppc_reflo_reloc PARAMS ((bfd *abfd,
						      arelent *reloc,
						      asymbol *symbol,
						      PTR data,
						      asection *section,
						      bfd *output_bfd,
						      char **error));
static bfd_reloc_status_type ppc_pair_reloc PARAMS ((bfd *abfd,
						     arelent *reloc,
						     asymbol *symbol,
						     PTR data,
						     asection *section,
						     bfd *output_bfd,
						     char **error));


static bfd_reloc_status_type ppc_toc16_reloc PARAMS ((bfd *abfd,
						      arelent *reloc,
						      asymbol *symbol,
						      PTR data,
						      asection *section,
						      bfd *output_bfd,
						      char **error));

static bfd_reloc_status_type ppc_addr32nb_reloc PARAMS ((bfd *abfd,
							 arelent *reloc,
							 asymbol *symbol,
							 PTR data,
							 asection *section,
							 bfd *output_bfd,
							 char **error));

static bfd_reloc_status_type ppc_section_reloc PARAMS ((bfd *abfd,
							arelent *reloc,
							asymbol *symbol,
							PTR data,
							asection *section,
							bfd *output_bfd,
							char **error));

static bfd_reloc_status_type ppc_secrel_reloc PARAMS ((bfd *abfd,
						       arelent *reloc,
						       asymbol *symbol,
						       PTR data,
						       asection *section,
						       bfd *output_bfd,
						       char **error));

static bfd_reloc_status_type ppc_imglue_reloc PARAMS ((bfd *abfd,
						       arelent *reloc,
						       asymbol *symbol,
						       PTR data,
						       asection *section,
						       bfd *output_bfd,
						       char **error));



static boolean in_reloc_p PARAMS((bfd *abfd, reloc_howto_type *howto));


/* FIXME: It'll take a while to get through all of these. I only need a few to
   get us started, so those I'll make sure work. Those marked FIXME are either
   completely unverified or have a specific unknown marked in the comment */

/*---------------------------------------------------------------------------*/
/*                                                                           */
/* Relocation entries for Windows/NT on PowerPC.                             */
/*                                                                           */
/* From the document "" we find the following listed as used relocs:         */
/*                                                                           */
/*   ABSOLUTE       : The noop                                               */
/*   ADDR[64|32|16] : fields that hold addresses in data fields or the       */
/*                    16 bit displacement field on a load/store.             */
/*   ADDR[24|14]    : fields that hold addresses in branch and cond          */
/*                    branches. These represent [26|16] bit addresses.       */
/*                    The low order 2 bits are preserved.                    */
/*   REL[24|14]     : branches relative to the Instruction Address           */
/*                    register. These represent [26|16] bit addresses,       */
/*                    as before. The instruction field will be zero, and     */
/*                    the address of the SYM will be inserted at link time.  */
/*   TOCREL16       : 16 bit displacement field referring to a slot in       */
/*                    toc.                                                   */
/*   TOCREL14       : 16 bit displacement field, similar to REL14 or ADDR14. */
/*   ADDR32NB       : 32 bit address relative to the virtual origin.         */
/*                    (On the alpha, this is always a linker generated thunk)*/
/*                    (i.e. 32bit addr relative to the image base)           */
/*   SECREL         : The value is relative to the start of the section      */
/*                    containing the symbol.                                 */
/*   SECTION        : access to the header containing the item. Supports the */
/*                    codeview debugger.                                     */
/*                                                                           */
/* In particular, note that the document does not indicate that the          */
/* relocations listed in the header file are used.                           */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/*---------------------------------------------------------------------------*/

static reloc_howto_type ppc_coff_howto_table[] =
{
  /* IMAGE_REL_PPC_ABSOLUTE 0x0000   NOP */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_ABSOLUTE, /* type */                                 
	 0,	                 /* rightshift */                           
	 0,	                 /* size (0 = byte, 1 = short, 2 = long) */ 
	 0,	                 /* bitsize */                   
	 false,	                 /* pc_relative */                          
	 0,	                 /* bitpos */                               
	 complain_overflow_dont, /* dont complain_on_overflow */
	 0,		         /* special_function */                     
	 "ABSOLUTE",             /* name */
	 false,	                 /* partial_inplace */                      
	 0x00,	 	         /* src_mask */                             
	 0x00,        		 /* dst_mask */                             
	 false),                 /* pcrel_offset */
  
  /* IMAGE_REL_PPC_ADDR64 0x0001  64-bit address */
  /* Unused: */
  HOWTO(IMAGE_REL_PPC_ADDR64,    /* type */                                 
	0,	                 /* rightshift */                           
	3,	                 /* size (0 = byte, 1 = short, 2 = long) */ 
	64,	                 /* bitsize */                   
	false,	                 /* pc_relative */                          
	0,	                 /* bitpos */                               
	complain_overflow_bitfield, 	 /* complain_on_overflow */
	0,		         /* special_function */                     
	"ADDR64",               /* name */
	true,	                 /* partial_inplace */                      
	MINUS_ONE,	 	 /* src_mask */
	MINUS_ONE,        	 /* dst_mask */
	false),                 /* pcrel_offset */

  /* IMAGE_REL_PPC_ADDR32 0x0002  32-bit address */
  /* Used: */
  HOWTO (IMAGE_REL_PPC_ADDR32,	/* type */
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "ADDR32",              /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,            /* src_mask */                             
	 0xffffffff,            /* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_ADDR24 0x0003  26-bit address, shifted left 2 (branch absolute) */
  /* the LI field is in bit 6 through bit 29 is 24 bits, + 2 for the shift */
  /* Of course, That's the IBM approved bit numbering, which is not what */
  /* anyone else uses.... The li field is in bit 2 thru 25 */ 
  /* Used: */
  HOWTO (IMAGE_REL_PPC_ADDR24,  /* type */
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 26,	                /* bitsize */
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "ADDR24",              /* name */
	 true,	                /* partial_inplace */                      
	 0x07fffffc,	        /* src_mask */                             
	 0x07fffffc,        	/* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_ADDR16 0x0004  16-bit address */
  /* Used: */
  HOWTO (IMAGE_REL_PPC_ADDR16,  /* type */             
	 0,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "ADDR16",              /* name */
	 true,	                /* partial_inplace */                      
	 0xffff,	        /* src_mask */                             
	 0xffff,        	/* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_ADDR14 0x0005 */
  /*  16-bit address, shifted left 2 (load doubleword) */
  /* FIXME: the mask is likely wrong, and the bit position may be as well */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_ADDR14,  /* type */             
	 1,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "ADDR16",              /* name */
	 true,	                /* partial_inplace */                      
	 0xffff,	        /* src_mask */                             
	 0xffff,        	/* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_REL24 0x0006 */
  /*   26-bit PC-relative offset, shifted left 2 (branch relative) */
  /* Used: */
  HOWTO (IMAGE_REL_PPC_REL24,   /* type */
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 26,	                /* bitsize */                   
	 true,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "REL24",               /* name */
	 true,	                /* partial_inplace */                      
	 0x3fffffc,	        /* src_mask */                             
	 0x3fffffc,        	/* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_REL14 0x0007 */
  /*   16-bit PC-relative offset, shifted left 2 (br cond relative) */
  /* FIXME: the mask is likely wrong, and the bit position may be as well */
  /* FIXME: how does it know how far to shift? */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_ADDR14,  /* type */             
	 1,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "ADDR16",              /* name */
	 true,	                /* partial_inplace */                      
	 0xffff,	        /* src_mask */                             
	 0xffff,        	/* dst_mask */                             
	 true),                 /* pcrel_offset */
  
  /* IMAGE_REL_PPC_TOCREL16 0x0008 */
  /*   16-bit offset from TOC base */
  /* Used: */
  HOWTO (IMAGE_REL_PPC_TOCREL16,/* type */             
	 0,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_dont, /* complain_on_overflow */
	 ppc_toc16_reloc,       /* special_function */                     
	 "TOCREL16",            /* name */
	 false,	                /* partial_inplace */                      
	 0xffff,	        /* src_mask */                             
	 0xffff,        	/* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_TOCREL14 0x0009 */
  /*   16-bit offset from TOC base, shifted left 2 (load doubleword) */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_TOCREL14,/* type */             
	 1,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "TOCREL14",            /* name */
	 false,	                /* partial_inplace */                      
	 0xffff,	        /* src_mask */                             
	 0xffff,        	/* dst_mask */                             
	 false),                /* pcrel_offset */
  
  /* IMAGE_REL_PPC_ADDR32NB 0x000A */
  /*   32-bit addr w/ image base */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_ADDR32NB,/* type */             
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,                     /* special_function */                     
	 "ADDR32NB",            /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 false),                 /* pcrel_offset */
  
  /* IMAGE_REL_PPC_SECREL 0x000B */
  /*   va of containing section (as in an image sectionhdr) */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_SECREL,/* type */             
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 ppc_secrel_reloc,      /* special_function */                     
	 "SECREL",              /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 true),                 /* pcrel_offset */

  /* IMAGE_REL_PPC_SECTION 0x000C */
  /*   sectionheader number */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_SECTION,/* type */             
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 ppc_section_reloc,     /* special_function */                     
	 "SECTION",             /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 true),                 /* pcrel_offset */

  /* IMAGE_REL_PPC_IFGLUE 0x000D */
  /*   substitute TOC restore instruction iff symbol is glue code */
  /* Used: */
  HOWTO (IMAGE_REL_PPC_IFGLUE,/* type */             
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "IFGLUE",              /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 false),                /* pcrel_offset */

  /* IMAGE_REL_PPC_IMGLUE 0x000E */
  /*   symbol is glue code; virtual address is TOC restore instruction */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_IMGLUE,/* type */             
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_dont, /* complain_on_overflow */
	 ppc_imglue_reloc,      /* special_function */                     
	 "IMGLUE",              /* name */
	 false,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 false),                 /* pcrel_offset */

  /* IMAGE_REL_PPC_SECREL16 0x000F */
  /*   va of containing section (limited to 16 bits) */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_SECREL16,/* type */             
	 0,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 0,		        /* special_function */                     
	 "SECREL16",            /* name */
	 true,	                /* partial_inplace */                      
	 0xffff,	        /* src_mask */                             
	 0xffff,        	/* dst_mask */                             
	 true),                 /* pcrel_offset */

  /* IMAGE_REL_PPC_REFHI             0x0010 */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_REFHI,   /* type */             
	 0,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 ppc_refhi_reloc,	/* special_function */                     
	 "REFHI",               /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 false),                 /* pcrel_offset */

  /* IMAGE_REL_PPC_REFLO             0x0011 */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_REFLO,   /* type */             
	 0,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 ppc_refhi_reloc,	/* special_function */                     
	 "REFLO",               /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 false),                /* pcrel_offset */

  /* IMAGE_REL_PPC_PAIR              0x0012 */
  /* Unused: */
  HOWTO (IMAGE_REL_PPC_PAIR,    /* type */             
	 0,	                /* rightshift */                           
	 1,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 16,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 ppc_pair_reloc,        /* special_function */                     
	 "PAIR",                /* name */
	 true,	                /* partial_inplace */                      
	 0xffffffff,	        /* src_mask */                             
	 0xffffffff,        	/* dst_mask */                             
	 false)                 /* pcrel_offset */
};




/* Some really cheezy macros that can be turned on to test stderr :-) */


#ifdef DEBUG_RELOC
#define UN_IMPL(x)                                           \
{                                                            \
   static int i;                                             \
   if (i == 0)                                               \
     {                                                       \
       i = 1;                                                \
       fprintf(stderr,"Unimplemented Relocation -- %s\n",x); \
     }                                                       \
}

#define DUMP_RELOC(n,r)                              \
{                                                    \
   fprintf(stderr,"%s sym %d, addr %d, addend %d\n", \
	   n, (*(r->sym_ptr_ptr))->name,             \
	   r->address, r->addend);                   \
}

/* Given a reloc name, n, and a pointer to an internal_reloc, 
   dump out interesting information on the contents 

#define n_name		_n._n_name
#define n_zeroes	_n._n_n._n_zeroes
#define n_offset	_n._n_n._n_offset

*/

#define DUMP_RELOC2(n,r)                     \
{                                            \
   fprintf(stderr,"%s sym %d, r_vaddr %d\n", \
	   n, r->r_symndx, r->r_vaddr);      \
}

#else
#define UN_IMPL(x)
#define DUMP_RELOC(n,r)
#define DUMP_RELOC2(n,r)
#endif



/* toc construction and management routines */
extern bfd* bfd_of_toc_owner;
extern long int global_toc_size;

extern long int import_table_size;
extern long int first_thunk_address;
extern long int thunk_size;

enum toc_type
{
  default_toc,
  toc_32,
  toc_64
};

/* record a toc offset against a symbol */
static int
ppc_record_toc_entry(abfd, info, sec, sym, toc_kind)
     bfd *abfd;
     struct bfd_link_info *info;
     asection *sec;
     int sym;
     enum toc_type toc_kind;
{
  bfd_byte *t;
  bfd_byte *old_contents;
  asection *s;
  int element_size;
  int data;
  int offset;
  struct coff_link_hash_entry *h;
  struct coff_symbol_struct *target;
  int ret_val;
  const char *name;

  int *local_syms;

  h = 0;

  h = obj_coff_sym_hashes (abfd)[sym];

  if (h == 0) 
    { 
      local_syms = obj_coff_local_toc_table(abfd);
      if (local_syms == 0)
	{
	  int i;
	  /* allocate a table */
	  local_syms = 
	    (int *) bfd_zalloc (abfd, 
				obj_raw_syment_count(abfd) * sizeof(int));
	  if (local_syms == 0)
	    {
	      bfd_set_error (bfd_error_no_memory);
	      return false;
	    }
	  obj_coff_local_toc_table(abfd) = local_syms;
	  for (i = 0; i < obj_raw_syment_count(abfd); ++i)
	    local_syms[i] = 1;
	}

      if (local_syms[sym] == 1) 
	{
	  local_syms[sym] = global_toc_size;
	  ret_val = global_toc_size;
	  global_toc_size += 4;
#ifdef TOC_DEBUG
	  fprintf(stderr,
		  "Setting toc_offset for local sym %d to %d\n",
		  sym, ret_val);
#endif
	}
      else
	{
	  ret_val = local_syms[sym];
#ifdef TOC_DEBUG
	  fprintf(stderr,
		  "toc_offset already set for local sym %d to %d\n",
		  sym, ret_val);
#endif
	}
    }
  else
    {
      name = h->root.root.string;

      /* check to see if there's a toc slot allocated. If not, do it
	 here. It will be used in relocate_section */
      if (h->toc_offset == 1)
	{
	  h->toc_offset = global_toc_size;
	  ret_val = global_toc_size;
	  global_toc_size += 4;
#ifdef TOC_DEBUG
	  fprintf(stderr,
		  "Setting toc_offset for sym %d (%s) [h=%p] to %d\n",
		  sym, name, h, ret_val);
#endif
	}
      else
	{
	  ret_val = h->toc_offset;
#ifdef TOC_DEBUG
	  fprintf(stderr,
		  "toc_offset already set for sym %d (%s) [h=%p] to %d\n",
		  sym, name, h, ret_val);
#endif
	}
    }

  return ret_val;
}


/* Provided the symbol, returns the value reffed */
static long get_symbol_value PARAMS ((asymbol *));

static long
get_symbol_value (symbol)       
     asymbol *symbol;
{                                             
  long relocation = 0;

  if (bfd_is_com_section (symbol->section))
    {
      relocation = 0;                           
    }
  else 
    {                                      
      relocation = symbol->value +
	symbol->section->output_section->vma +
	  symbol->section->output_offset;
    }                                           

  return(relocation);
}

/* Return true if this relocation should
   appear in the output .reloc section. */

static boolean in_reloc_p(abfd, howto)
     bfd * abfd;
     reloc_howto_type *howto;
{
  return 
    (! howto->pc_relative) 
      && (howto->type != IMAGE_REL_PPC_TOCREL16)
      && (howto->type != IMAGE_REL_PPC_IMGLUE);
}     

/* this function is in charge of performing all the ppc PE relocations */
/* Don't yet know if we want to do this this particular way ... (krk)  */
/* FIXME: (it is not yet enabled) */

static bfd_reloc_status_type
pe_ppc_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
	      error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol_in;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  /* the consth relocation comes in two parts, we have to remember
     the state between calls, in these variables */
  static boolean part1_consth_active = false;
  static unsigned long part1_consth_value;

  unsigned long insn;
  unsigned long sym_value;
  unsigned long unsigned_value;
  unsigned short r_type;
  long signed_value;
  
  unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
  bfd_byte  *hit_data =addr + (bfd_byte *)(data);
	
  fprintf(stderr, "pe_ppc_reloc (%s)\n", TARGET_LITTLE_NAME);

  r_type = reloc_entry->howto->type;

  if (output_bfd) 
    {
      /* Partial linking - do nothing */
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok; 
    }

  if (symbol_in != NULL
      && bfd_is_und_section (symbol_in->section))
    {
      /* Keep the state machine happy in case we're called again */
      if (r_type == IMAGE_REL_PPC_REFHI) 
	{
	  part1_consth_active = true;
	  part1_consth_value  = 0;
	}
      return(bfd_reloc_undefined);
    }
  
  if ((part1_consth_active) && (r_type != IMAGE_REL_PPC_PAIR)) 
    {
      part1_consth_active = false;
      *error_message = (char *) "Missing PAIR";
      return(bfd_reloc_dangerous);
    }


  sym_value = get_symbol_value(symbol_in);
  
  return(bfd_reloc_ok);	
}

/* The reloc processing routine for the optimized COFF linker.  */

static boolean
coff_ppc_relocate_section (output_bfd, info, input_bfd, input_section,
			   contents, relocs, syms, sections)
     bfd *output_bfd;
     struct bfd_link_info *info;
     bfd *input_bfd;
     asection *input_section;
     bfd_byte *contents;
     struct internal_reloc *relocs;
     struct internal_syment *syms;
     asection **sections;
{
  struct internal_reloc *rel;
  struct internal_reloc *relend;
  boolean hihalf;
  bfd_vma hihalf_val;
  asection *toc_section = 0;
  bfd_vma relocation;
  reloc_howto_type *howto = 0;
  
#ifdef DEBUG_RELOC
  fprintf(stderr, 
	  "pe_ppc_relocate_section (%s) for %s \n", 
	  TARGET_LITTLE_NAME,
	  input_section->name);
  
#endif  

  /* If we are performing a relocateable link, we don't need to do a
     thing.  The caller will take care of adjusting the reloc
     addresses and symbol indices.  */
  if (info->relocateable)
    return true;
  
  hihalf = false;
  hihalf_val = 0;

  rel = relocs;
  relend = rel + input_section->reloc_count;
  for (; rel < relend; rel++)
    {
      long symndx;
      struct coff_link_hash_entry *h;
      struct internal_syment *sym;
      bfd_vma val;

      asection *sec;
      bfd_reloc_status_type rstat;
      bfd_byte *loc;

      unsigned short r_type  = EXTRACT_TYPE (rel->r_type);
      unsigned short r_flags = EXTRACT_FLAGS(rel->r_type);
      unsigned short junk    = EXTRACT_JUNK (rel->r_type);
  
#ifdef DEBUG_RELOC
  /* now examine flags */
  if (r_flags != 0) 
    {
      fprintf (stderr, "Reloc with flags found!");
      if ( r_flags & IMAGE_REL_PPC_NEG ) 
	fprintf (stderr, " NEG");
      if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
	fprintf (stderr, " BRTAKEN");
      if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
	fprintf (stderr, " BRNTAKEN");
      if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
	fprintf (stderr, " TOCDEFN");
      fprintf(stderr, "\n");
    }
#endif

      symndx = rel->r_symndx;
      loc = contents + rel->r_vaddr - input_section->vma;

      /* FIXME: check bounds on r_type */
      howto = ppc_coff_howto_table + r_type;

      if (symndx == -1)
	{
	  h = NULL;
	  sym = NULL;
	}
      else
	{
	  h = obj_coff_sym_hashes (input_bfd)[symndx];
	  sym = syms + symndx;
	}

      sec = NULL;
      val = 0;

      /* FIXME: PAIR unsupported in the following code */
      if (h == NULL)
	{
	  if (symndx == -1)
	    sec = bfd_abs_section_ptr;
	  else
	    {
	      sec = sections[symndx];
	      val = (sec->output_section->vma
		     + sec->output_offset
		     + sym->n_value
		     - sec->vma);
	    }
	}
      else
	{
	  if (h->root.type == bfd_link_hash_defined
	      || h->root.type == bfd_link_hash_defweak)
	    {
	      sec = h->root.u.def.section;
	      val = (h->root.u.def.value
		     + sec->output_section->vma
		     + sec->output_offset);
	    }
	  else
	    {
	      if (! ((*info->callbacks->undefined_symbol)
		     (info, h->root.root.string, input_bfd, input_section,
		      rel->r_vaddr - input_section->vma)))
		return false;
	    }
	}

      rstat = bfd_reloc_ok;
      
      /* Each case must do its own relocation, setting rstat appropriately */
      switch (r_type)
	{
	default:
	  fprintf( stderr, 
		  "ERROR: during reloc processing -- unsupported reloc %s\n", 
		  howto->name);
	  bfd_set_error (bfd_error_bad_value);
	  abort();
	  return false;
	case IMAGE_REL_PPC_TOCREL16:
	  {
	    bfd_vma our_toc_offset;
	    int fixit;

	    DUMP_RELOC2(howto->name, rel);

	    if (toc_section == 0) 
	      {
		toc_section = bfd_get_section_by_name (bfd_of_toc_owner, 
						       TOC_SECTION_NAME);
#ifdef TOC_DEBUG

		fprintf(stderr,
			"BFD of toc owner %p, section addr of %s %p\n",
			 bfd_of_toc_owner, TOC_SECTION_NAME, toc_section);
#endif

		if ( toc_section == NULL ) 
		  {
		    fprintf(stderr, "No Toc section!\n");
		    abort();
		  }
	      }

	    /* 
	     *  Amazing bit tricks present. As we may have seen earlier, we
	     *  use the 1 bit to tell us whether or not a toc offset has been
	     *  allocated. Now that they've all been allocated, we will use
	     *  the 1 bit to tell us if we've written this particular toc
	     *  entry out.
	     */
	    fixit = false;
	    if (h == 0)
	      { /* it is a file local symbol */
		int *local_toc_table;
		const char *name;

		sym = syms + symndx;
		name = sym->_n._n_name;

		local_toc_table = obj_coff_local_toc_table(input_bfd);
		our_toc_offset = local_toc_table[symndx];

		if ((our_toc_offset & 1) != 0)
		  {
		    /* if it has been written out, it is marked with the 
		       1 bit. Fix up our offset, but do not write it out
		       again.
		     */
		    our_toc_offset &= ~1;
#ifdef TOC_DEBUG

		    fprintf(stderr,
			    "Not writing out toc_offset of %d for %s\n", our_toc_offset, name);
#endif
		  }
		else
		  {
		    /* write out the toc entry */
#ifdef TOC_DEBUG
		    fprintf(stderr,
			    "Writing out toc_offset toc_section (%p,%p)+%d val %d for %s\n", 
			    toc_section,
			    toc_section->contents,
			    our_toc_offset, 
			    val,
			    name);
#endif

		    bfd_put_32(output_bfd,
			       val,
			       toc_section->contents + our_toc_offset);

		    local_toc_table[symndx] |= 1;
		    fixit = true;
		  }
	      }
	    else
	      {
		const char *name = h->root.root.string;
		our_toc_offset = h->toc_offset;
		if ((our_toc_offset & 1) != 0)
		  {
		    /* if it has been written out, it is marked with the 
		       1 bit. Fix up our offset, but do not write it out
		       again.
		     */
		    our_toc_offset &= ~1;
#ifdef TOC_DEBUG
		    fprintf(stderr,
			    "Not writing out toc_offset of %d for %s\n", our_toc_offset, name);
#endif
		  }
		else
		  {
#ifdef TOC_DEBUG
		    /* write out the toc entry */
		    fprintf(stderr,
			    "Writing out toc_offset toc_section (%p,%p)+%d val %d for %s\n", 
			    toc_section,
			    toc_section->contents,
			    our_toc_offset, 
			    val,
			    name);
#endif

		    /* write out the toc entry */
		    bfd_put_32(output_bfd,
			       val,
			       toc_section->contents + our_toc_offset);

		    h->toc_offset |= 1;
		    /* The tricky part is that this is the address that */
		    /* needs a .reloc entry for it */
		    fixit = true;
		  }
	      }

	    if (fixit && info->base_file) 
	      {
		/* So if this is non pcrelative, and is referenced
		   to a section or a common symbol, then it needs a reloc */

		/* relocation to a symbol in a section which
		   isn't absolute - we output the address here 
		   to a file */

		bfd_vma addr =  toc_section->output_section->vma
		  + toc_section->output_offset + our_toc_offset;
		    
		fprintf(stderr,
			"  Toc Section reloc candidate\n");
		    
		if (coff_data(output_bfd)->pe)
		  addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
		fwrite (&addr, 1,4, (FILE *) info->base_file);
	      }


	    /* FIXME: this test is conservative */
	    if (our_toc_offset > toc_section->_raw_size)
	      {
		fprintf(stderr,
			"reloc offset is bigger than the toc size!\n");
		abort();
	      }

	    /* Now we know the relocation for this toc reference */
	    relocation =  our_toc_offset + TOC_LOAD_ADJUSTMENT;
	    rstat = _bfd_relocate_contents (howto,
					    input_bfd, 
					    relocation, 
					    loc);
	  }
	  break;
	case IMAGE_REL_PPC_IFGLUE:
	  /* To solve this, we need to know whether or not the symbol */
	  /* appearing on the call instruction is a function included */
	  /* in the link or not. If it is, then we leave the nop instruction */
	  /* alone, and the reloc is done. */

	  /* Actually, for dll support on NT, this is likely not necessary at
	     all. For any library function, a glue code stub must be supplied
	     to the linker, and the glue will take care of the toc reload */
	  DUMP_RELOC2(howto->name, rel);
#if 0
	  if (h == 0) 
	    {
	      /* this better be a static function */
		  fprintf(stderr,
			  "It's a static function.... \n");
	    }
	  else
	    {
	      /* this is an externally visible function */
	      /* is it present? */
	      if (h->root.type == bfd_link_hash_defined
		  || h->root.type == bfd_link_hash_defweak)
		{
		  fprintf(stderr,
			  "The function is present. \n");
		  ;
		}
	      else
		{
		  fprintf(stderr,
			  "The function is not present. \n");
		}
	    }
#endif
	  break;
	case IMAGE_REL_PPC_SECREL:
	  /* Unimplemented: codeview debugging information */
	  /* For fast access to the header of the section 
	     containing the item. */
	  break;
	case IMAGE_REL_PPC_SECTION:
	  /* Unimplemented: codeview debugging information */
	  /* Is used to indicate that the value should be relative
	     to the beginning of the section that contains the
	     symbol */
	  break;
	case IMAGE_REL_PPC_ABSOLUTE:
	case IMAGE_REL_PPC_IMGLUE:
	  {
	    const char *my_name;
	    if (h == 0)
		my_name = (syms+symndx)->_n._n_name;
	    else
		my_name = h->root.root.string;

	    fprintf(stderr, 
		    "Warning: unsupported reloc %s <file %s, section %s>\n", 
		    howto->name,
		    bfd_get_filename(input_bfd),
		    input_section->name);

	    fprintf(stderr,"sym %d (%s), r_vaddr %d (%x)\n", 
		    rel->r_symndx, my_name, rel->r_vaddr, rel->r_vaddr);  
	  }
	  break;

	case IMAGE_REL_PPC_ADDR32NB:
	  {
	    struct coff_link_hash_entry *myh = 0;
	    const char *name = 0;
	    DUMP_RELOC2(howto->name, rel);
	    if (h == 0)
	      { /* it is a file local symbol */
		sym = syms + symndx;
		name = sym->_n._n_name;
	      }
	    else
	      {
		char *target = 0;

		name = h->root.root.string;
		if (strcmp(".idata$2", name) == 0)
		  target = "__idata2_magic__";
		else if (strcmp(".idata$4", name) == 0)
		  target = "__idata4_magic__";
		else if (strcmp(".idata$5", name) == 0)
		  target = "__idata5_magic__";
		else
		  abort();

		myh = 0;

		myh = coff_link_hash_lookup (coff_hash_table (info),
					     target,
					     false, false, true);
		if (myh == 0) 
		  {
		    fprintf(stderr, "Missing idata magic cookies, this cannot work anyway...\n");
		    abort();
		  }

		val = myh->root.u.def.value + sec->output_section->vma + sec->output_offset;
		if (first_thunk_address == 0)
		  {
		    int idata5offset;
		    myh = coff_link_hash_lookup (coff_hash_table (info),
						 "__idata5_magic__",
						 false, false, true);
		    first_thunk_address = myh->root.u.def.value + sec->output_section->vma + 
		      sec->output_offset - pe_data(output_bfd)->pe_opthdr.ImageBase;

		    idata5offset = myh->root.u.def.value;
		    myh = coff_link_hash_lookup (coff_hash_table (info),
						 "__idata6_magic__",
						 false, false, true);

		    thunk_size = myh->root.u.def.value - idata5offset;
		    myh = coff_link_hash_lookup (coff_hash_table (info),
						 "__idata4_magic__",
						 false, false, true);
		    import_table_size = myh->root.u.def.value;
		  }
	      }

	    rstat = _bfd_relocate_contents (howto,
					    input_bfd, 
					    val - pe_data(output_bfd)->pe_opthdr.ImageBase,
					    loc);
	  }
	  break;

	case IMAGE_REL_PPC_ADDR16:
	case IMAGE_REL_PPC_REL24:
	case IMAGE_REL_PPC_ADDR24:
	case IMAGE_REL_PPC_ADDR32:
	  DUMP_RELOC2(howto->name, rel);
	  rstat = _bfd_relocate_contents (howto,
					  input_bfd, 
					  val, 
					  loc);
	  break;
	}

      if ( info->base_file )
	{
	  /* So if this is non pcrelative, and is referenced
	     to a section or a common symbol, then it needs a reloc */
	  if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto))
	    {
	      /* relocation to a symbol in a section which
		 isn't absolute - we output the address here 
		 to a file */
	      bfd_vma addr = rel->r_vaddr 
		- input_section->vma 
		+ input_section->output_offset 
		  + input_section->output_section->vma;

	      if (coff_data(output_bfd)->pe)
		{
		  addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
		  fprintf(stderr,
			  " adjusted down to %d", addr);
		}
	      fprintf(stderr, "\n");

	      fwrite (&addr, 1,4, (FILE *) info->base_file);
	    }
	}

      switch (rstat)
	{
	default:
	  abort ();
	case bfd_reloc_ok:
	  break;
	case bfd_reloc_overflow:
	  {
	    const char *name;
	    char buf[SYMNMLEN + 1];

	    if (symndx == -1)
	      name = "*ABS*";
	    else if (h != NULL)
	      name = h->root.root.string;
	    else if (sym == NULL)
	      name = "*unknown*";
	    else if (sym->_n._n_n._n_zeroes == 0
		     && sym->_n._n_n._n_offset != 0)
	      name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
	    else
	      {
		strncpy (buf, sym->_n._n_name, SYMNMLEN);
		buf[SYMNMLEN] = '\0';
		name = buf;
	      }
#if 0
	    else
	      {
		name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
		if (name == NULL)
		  return false;
	      }
#endif

	    if (! ((*info->callbacks->reloc_overflow)
		   (info, name, howto->name, 
		    (bfd_vma) 0, input_bfd,
		    input_section, rel->r_vaddr - input_section->vma)))
	      return false;
	  }
	}

    }     

  return true;
}

#ifdef COFF_IMAGE_WITH_PE

long int global_toc_size = 0;

bfd* bfd_of_toc_owner = 0;

long int import_table_size;
long int first_thunk_address;
long int thunk_size;


boolean
ppc_allocate_toc_section (info) 
     struct bfd_link_info *info;
{
  asection *s;
  bfd_byte *foo;
  static char test_char = '1';

#ifdef DEBUG_TOC
  fprintf(stderr,
	  "ppc_allocate_toc_section: allocating %s section of size %d\n",
	  TOC_SECTION_NAME, global_toc_size);
#endif

  if ( global_toc_size == 0 ) /* FIXME: does this get me in trouble? */
    return true;

  if (bfd_of_toc_owner == 0)
    {
      fprintf(stderr,
	      "There is no bfd that owns the toc section!\n");
      abort();
    }

  s = bfd_get_section_by_name ( bfd_of_toc_owner , TOC_SECTION_NAME);
  if (s == NULL) 
    {
      fprintf(stderr, "No Toc section!\n");
      abort();
    }

  foo = bfd_alloc(bfd_of_toc_owner, global_toc_size);
  memset(foo, test_char, global_toc_size);

  s->_raw_size = s->_cooked_size = global_toc_size;
  s->contents = foo;

  return true;
}

boolean
ppc_process_before_allocation (abfd, info)
     bfd *abfd;
     struct bfd_link_info *info;
{
  asection *sec;
  struct internal_reloc *i, *rel;

#if 0
  fprintf(stderr, 
	  "ppc_process_before_allocation: BFD %s\n", 
	  bfd_get_filename(abfd));
#endif

  /* here we have a bfd that is to be included on the link. We have a hook
     to do reloc rummaging, before section sizes are nailed down. */

  _bfd_coff_get_external_symbols(abfd);

  /* rummage around all the relocs and map the toc */
  sec = abfd->sections;

  if (sec == 0)
    {
      return true;
    }

  for (; sec != 0; sec = sec->next)
  {
    int toc_offset;
#ifdef DEBUG_RELOC
    fprintf(stderr, 
	    "  section %s reloc count %d\n", 
	    sec->name, 
	    sec->reloc_count);
#endif

    if (sec->reloc_count == 0) 
      continue;

    /* load the relocs */
    /* FIXME: there may be a storage leak here */
    i=_bfd_coff_read_internal_relocs(abfd,sec,1,0,0,0);
    
    if (i == 0)
      abort();

    for (rel=i;rel<i+sec->reloc_count;++rel) 
      {
	unsigned short r_type  = EXTRACT_TYPE (rel->r_type);
	unsigned short r_flags = EXTRACT_FLAGS(rel->r_type);
	unsigned short junk    = EXTRACT_JUNK (rel->r_type);

#ifdef DEBUG_RELOC
  /* now examine flags */
  if (r_flags != 0) 
    {
      fprintf (stderr, "Reloc with flags found!");
      if ( r_flags & IMAGE_REL_PPC_NEG ) 
	fprintf (stderr, " NEG");
      if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
	fprintf (stderr, " BRTAKEN");
      if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
	fprintf (stderr, " BRNTAKEN");
      if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
	fprintf (stderr, " TOCDEFN");
      fprintf(stderr, "\n");
    }
#endif
	
	DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);

	switch(r_type) 
	  {
	  case IMAGE_REL_PPC_TOCREL16:
	    toc_offset = ppc_record_toc_entry(abfd, info, sec, 
					      rel->r_symndx, default_toc);
	    break;
	  default:
	    break;
	  }
      }
  }
}

#endif


static bfd_reloc_status_type
ppc_refhi_reloc (abfd,
		 reloc_entry,
		 symbol,
		 data,
		 input_section,
		 output_bfd,
		 error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("REFHI");
  DUMP_RELOC("REFHI",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_undefined;
}

static bfd_reloc_status_type
ppc_reflo_reloc (abfd,
		 reloc_entry,
		 symbol,
		 data,
		 input_section,
		 output_bfd,
		 error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("REFLO");
  DUMP_RELOC("REFLO",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_undefined;
}

static bfd_reloc_status_type
ppc_pair_reloc (abfd,
		reloc_entry,
		symbol,
		data,
		input_section,
		output_bfd,
		error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("PAIR");
  DUMP_RELOC("PAIR",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_undefined;
}


static bfd_reloc_status_type
ppc_toc16_reloc (abfd,
		 reloc_entry,
		 symbol,
		 data,
		 input_section,
		 output_bfd,
		 error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("TOCREL16");
  DUMP_RELOC("TOCREL16",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    {
      return bfd_reloc_continue;
    }

  return bfd_reloc_ok;
}

/* ADDR32NB : 32 bit address relative to the virtual origin.         */
/*            (On the alpha, this is always a linker generated thunk)*/
/*            (i.e. 32bit addr relative to the image base)           */
/*                                                                   */
/*                                                                   */

static bfd_reloc_status_type
ppc_addr32nb_reloc (abfd,
		    reloc_entry,
		    symbol,
		    data,
		    input_section,
		    output_bfd,
		    error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("ADDR32NB");
  DUMP_RELOC("ADDR32NB",reloc_entry);

  return bfd_reloc_ok;
}

static bfd_reloc_status_type
ppc_secrel_reloc (abfd,
		  reloc_entry,
		  symbol,
		  data,
		  input_section,
		  output_bfd,
		  error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("SECREL");
  DUMP_RELOC("SECREL",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_ok;
}

static bfd_reloc_status_type
ppc_section_reloc (abfd,
		   reloc_entry,
		   symbol,
		   data,
		   input_section,
		   output_bfd,
		   error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("SECTION");
  DUMP_RELOC("SECTION",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_ok;
}

static bfd_reloc_status_type
ppc_imglue_reloc (abfd,
		  reloc_entry,
		  symbol,
		  data,
		  input_section,
		  output_bfd,
		  error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  UN_IMPL("IMGLUE");
  DUMP_RELOC("IMGLUE",reloc_entry);

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  return bfd_reloc_ok;
}



#define MAX_RELOC_INDEX  \
      (sizeof(ppc_coff_howto_table) / sizeof(ppc_coff_howto_table[0]) - 1)


/* FIXME: There is a possiblity that when we read in a reloc from a file,
          that there are some bits encoded in the upper portion of the 
	  type field. Not yet implemented.
*/
static void ppc_coff_rtype2howto PARAMS ((arelent *relent,
					  struct internal_reloc *internal));

static void
ppc_coff_rtype2howto (relent, internal)
     arelent *relent;
     struct internal_reloc *internal;
{  

  /* We can encode one of three things in the type field, aside from the
     type:
     1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction
        value, rather than an addition value
     2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that
        the branch is expected to be taken or not.
     3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file
     For now, we just strip this stuff to find the type, and ignore it other
     than that.
  */

  unsigned short r_type  = EXTRACT_TYPE (internal->r_type);
  unsigned short r_flags = EXTRACT_FLAGS(internal->r_type);
  unsigned short junk    = EXTRACT_JUNK (internal->r_type);

  /* the masking process only slices off the bottom byte for r_type. */
  if ( r_type > MAX_RELOC_INDEX ) 
    {
      fprintf(stderr, 
	      "ppc_coff_rtype2howto: reloc index %d out of range [%d, %d]\n",
	      internal->r_type, 0, MAX_RELOC_INDEX);
      abort();
    }

  /* check for absolute crap */
  if ( junk != 0 )
    {
      fprintf(stderr, 
	      "ppc_coff_rtype2howto: reloc index %d contains junk %d\n",
	      internal->r_type, junk);
      abort();
    }

#ifdef DEBUG_RELOC
  /* now examine flags */
  if (r_flags != 0) 
    {
      fprintf (stderr, "Reloc with flags found!");
      if ( r_flags & IMAGE_REL_PPC_NEG ) 
	fprintf (stderr, " NEG");
      if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
	fprintf (stderr, " BRTAKEN");
      if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
	fprintf (stderr, " BRNTAKEN");
      if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
	fprintf (stderr, " TOCDEFN");
      fprintf(stderr, "\n");
    }
#endif

  switch(r_type) 
    {
    case IMAGE_REL_PPC_ADDR16:
    case IMAGE_REL_PPC_REL24:
    case IMAGE_REL_PPC_ADDR24:
    case IMAGE_REL_PPC_TOCREL16:
    case IMAGE_REL_PPC_ADDR32:
    case IMAGE_REL_PPC_IFGLUE:
    case IMAGE_REL_PPC_ADDR32NB:
    case IMAGE_REL_PPC_SECTION:
    case IMAGE_REL_PPC_SECREL:
      DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
      break;
    case IMAGE_REL_PPC_IMGLUE:
      DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
      /* IMGLUE relocs have big numbers in them. Don't know what for yet. */
      internal->r_vaddr = 0; /* make it zero for now */
      break;
    default:
      fprintf(stderr, 
	      "Warning: Unsupported reloc %s [%d] used -- it may not work.\n",
	      ppc_coff_howto_table[r_type].name,
	      r_type);
      break;
    }
  
  relent->howto = ppc_coff_howto_table + r_type;
  
}

static reloc_howto_type *
coff_ppc_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
     bfd *abfd;
     asection *sec;
     struct internal_reloc *rel;
     struct coff_link_hash_entry *h;
     struct internal_syment *sym;
     bfd_vma *addendp;
{
  reloc_howto_type *howto;

  /* We can encode one of three things in the type field, aside from the
     type:
     1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction
        value, rather than an addition value
     2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that
        the branch is expected to be taken or not.
     3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file
     For now, we just strip this stuff to find the type, and ignore it other
     than that.
  */

  unsigned short r_type  = EXTRACT_TYPE (rel->r_type);
  unsigned short r_flags = EXTRACT_FLAGS(rel->r_type);
  unsigned short junk    = EXTRACT_JUNK (rel->r_type);

fprintf(stderr,
	"coff_ppc_rtype_to_howto\n");

  /* the masking process only slices off the bottom byte for r_type. */
  if ( r_type > MAX_RELOC_INDEX ) 
    {
      fprintf(stderr, 
	      "coff_ppc_rtype_to_howto: index %d out of range [%d, %d]\n",
	      r_type, 0, MAX_RELOC_INDEX);
      abort();
    }
  
  /* check for absolute crap */
  if ( junk != 0 )
    {
      fprintf(stderr, 
	      "coff_ppc_rtype_to_howto: reloc index %d contains junk %d\n",
	      rel->r_type, junk);
      abort();
    }
  
#ifdef DEBUG_RELOC
  /* now examine flags */
  if (r_flags != 0) 
    {
      fprintf (stderr, "Reloc with flags found!");
      if ( r_flags & IMAGE_REL_PPC_NEG ) 
	fprintf (stderr, " NEG");
      if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
	fprintf (stderr, " BRTAKEN");
      if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
	fprintf (stderr, " BRNTAKEN");
      if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
	fprintf (stderr, " TOCDEFN");
      fprintf(stderr, "\n");
    }
#endif
  
  switch(r_type) 
    {
    case IMAGE_REL_PPC_ADDR32NB:
      DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
      *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
      break;
    case IMAGE_REL_PPC_ADDR16:
    case IMAGE_REL_PPC_REL24:
    case IMAGE_REL_PPC_ADDR24:
    case IMAGE_REL_PPC_TOCREL16:
    case IMAGE_REL_PPC_ADDR32:
    case IMAGE_REL_PPC_IFGLUE:
    case IMAGE_REL_PPC_SECTION:
    case IMAGE_REL_PPC_SECREL:
      DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
      break;
    case IMAGE_REL_PPC_IMGLUE:
      DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
      /* IMGLUE relocs have big numbers in them. Don't know what for yet. */
      rel->r_vaddr = 0; /* make it zero for now */
      break;
    default:
      fprintf(stderr, 
	      "Warning: Unsupported reloc %s [%d] used -- it may not work.\n",
	      ppc_coff_howto_table[r_type].name,
	      r_type);
      break;
    }
  
  howto = ppc_coff_howto_table + r_type;
  return howto;
}


/* a cheesy little macro to make the code a little more readable */
#define HOW2MAP(bfd_rtype,ppc_rtype)  \
 case bfd_rtype: return &ppc_coff_howto_table[ppc_rtype]

static reloc_howto_type *ppc_coff_reloc_type_lookup
PARAMS ((bfd *, bfd_reloc_code_real_type));

static reloc_howto_type *
ppc_coff_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  
#ifdef DEBUG_RELOC
  fprintf(stderr, "ppc_coff_reloc_type_lookup for %s\n",
	  bfd_get_reloc_code_name(code));
#endif
  
  switch (code)
    {
      HOW2MAP(BFD_RELOC_16_GOT_PCREL, IMAGE_REL_PPC_IFGLUE);
      HOW2MAP(BFD_RELOC_16,           IMAGE_REL_PPC_ADDR16);
      HOW2MAP(BFD_RELOC_PPC_B26,      IMAGE_REL_PPC_REL24);
      HOW2MAP(BFD_RELOC_PPC_BA26,     IMAGE_REL_PPC_ADDR24);
      HOW2MAP(BFD_RELOC_PPC_TOC16,    IMAGE_REL_PPC_TOCREL16);
      HOW2MAP(BFD_RELOC_32,           IMAGE_REL_PPC_ADDR32);
      HOW2MAP(BFD_RELOC_RVA,          IMAGE_REL_PPC_ADDR32NB);
    default: 
      fprintf(stderr,
	      "\treturning NULL\n");
      return NULL;
    }
  
  return NULL;
}

#undef HOW2MAP


/* Tailor coffcode.h -- macro heaven. */

#define RTYPE2HOWTO(cache_ptr, dst)  ppc_coff_rtype2howto (cache_ptr, dst)

#ifndef COFF_IMAGE_WITH_PE
static void
ppc_coff_swap_sym_in_hook ();
#endif

/* We use the special COFF backend linker, with our own special touch.  */

#define coff_bfd_reloc_type_lookup   ppc_coff_reloc_type_lookup
#define coff_rtype_to_howto          coff_ppc_rtype_to_howto
#define coff_relocate_section        coff_ppc_relocate_section

#ifndef COFF_IMAGE_WITH_PE
#define coff_swap_sym_in_hook        ppc_coff_swap_sym_in_hook
#endif

#define SELECT_RELOC(internal, howto) {internal.r_type=howto->type;}

#define COFF_PAGE_SIZE                       0x1000

#define POWERPC_LE_PE

#include "coffcode.h"



#ifndef COFF_IMAGE_WITH_PE
static void
ppc_coff_swap_sym_in_hook (abfd, ext1, in1)
     bfd            *abfd;
     PTR ext1;
     PTR in1;
{
  SYMENT *ext = (SYMENT *)ext1;
  struct internal_syment      *in = (struct internal_syment *)in1;

#if 0
  if (bfd_of_toc_owner != 0) /* we already have a toc, so go home */
    return;
#endif

  if (strcmp(in->_n._n_name, ".toc") == 0)
    {
      flagword flags;
      register asection *s;
      char *foo;

      s = bfd_get_section_by_name ( abfd , TOC_SECTION_NAME);
      if (s != NULL) 
	{
	  return;
	}

      flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ;

#ifdef TOC_DEBUG
      fprintf(stderr,
	      "ppc_coff_swap_sym_in_hook: about to create the %s section\n",
	      TOC_SECTION_NAME);
#endif

      s = bfd_make_section (abfd, TOC_SECTION_NAME);

      if (s == NULL
	  || !bfd_set_section_flags (abfd, s, flags)
	  || !bfd_set_section_alignment (abfd, s, 2))
	{
	  fprintf(stderr,
		  "toc section allocation failed!\n");
	  abort();
	}

      /* save the bfd for later allocation */
      bfd_of_toc_owner = abfd;
    }

  return;
}
#endif



/* The transfer vectors that lead the outside world to all of the above. */

#ifdef TARGET_LITTLE_SYM
const bfd_target
TARGET_LITTLE_SYM =
{
  TARGET_LITTLE_NAME,		/* name or coff-arm-little */
  bfd_target_coff_flavour,
  false,			/* data byte order is little */
  false,			/* header byte order is little */

  (HAS_RELOC | EXEC_P |		/* FIXME: object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT),
  
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  0,				/* leading char */
  '/',				/* ar_pad_char */
  15,				/* ar_max_namelen??? FIXMEmgo */

  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
  bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */

  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
  bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
  
  {_bfd_dummy_target, coff_object_p, 	/* bfd_check_format */
     bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p },
  {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
     bfd_false},
  {bfd_false, coff_write_object_contents,	/* bfd_write_contents */
     _bfd_write_archive_contents, bfd_false},
  
  BFD_JUMP_TABLE_GENERIC (coff),
  BFD_JUMP_TABLE_COPY (coff),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
  BFD_JUMP_TABLE_SYMBOLS (coff),
  BFD_JUMP_TABLE_RELOCS (coff),
  BFD_JUMP_TABLE_WRITE (coff),
  BFD_JUMP_TABLE_LINK (coff),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
  
  COFF_SWAP_TABLE,
};
#endif

#ifdef TARGET_BIG_SYM
const bfd_target
TARGET_BIG_SYM =
{
  TARGET_BIG_NAME,
  bfd_target_coff_flavour,	
  true,				/* data byte order is big */
  true,				/* header byte order is big */

  (HAS_RELOC | EXEC_P |		/* FIXME: object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT),

  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  0,				/* leading char */
  '/',				/* ar_pad_char */
  15,				/* ar_max_namelen??? FIXMEmgo */

  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */

  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */

  {_bfd_dummy_target, coff_object_p, 	/* bfd_check_format */
     bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p },
  {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
     bfd_false},
  {bfd_false, coff_write_object_contents,	/* bfd_write_contents */
     _bfd_write_archive_contents, bfd_false},

  BFD_JUMP_TABLE_GENERIC (coff),
  BFD_JUMP_TABLE_COPY (coff),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
  BFD_JUMP_TABLE_SYMBOLS (coff),
  BFD_JUMP_TABLE_RELOCS (coff),
  BFD_JUMP_TABLE_WRITE (coff),
  BFD_JUMP_TABLE_LINK (coff),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  COFF_SWAP_TABLE,
};

#endif