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old-cross-binutils/bfd/coff-ppc.c

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/* BFD back-end for PowerPC Microsoft Portable Executable files.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996 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
- ld will link files, but they do not run.
- dlltool will not produce correct output in some .reloc cases, and will
not produce the right glue code for dll function calls.
*/
#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 toc is a set of bfd_vma fields. We use the fact that valid */
/* addresses are even (i.e. the bit representing "1" is off) to allow */
/* us to encode a little extra information in the field */
/* - Unallocated addresses are intialized to 1. */
/* - Allocated addresses are even numbers. */
/* The first time we actually write a reference to the toc in the bfd, */
/* we want to record that fact in a fixup file (if it is asked for), so */
/* we keep track of whether or not an address has been written by marking */
/* the low order bit with a "1" upon writing */
#define SET_UNALLOCATED(x) ((x) = 1)
#define IS_UNALLOCATED(x) ((x) == 1)
#define IS_WRITTEN(x) ((x) & 1)
#define MARK_AS_WRITTEN(x) ((x) |= 1)
#define MAKE_ADDR_AGAIN(x) ((x) &= ~1)
/* In order not to add an int to every hash table item for every coff
linker, we define our own hash table, derived from the coff one */
/* PE linker hash table entries. */
struct ppc_coff_link_hash_entry
{
struct coff_link_hash_entry root; /* First entry, as required */
/* As we wonder around the relocs, we'll keep the assigned toc_offset
here */
bfd_vma toc_offset; /* Our addition, as required */
int symbol_is_glue;
unsigned long int glue_insn;
char eye_catcher[8];
};
/* Need a 7 char string for an eye catcher */
#define EYE "krkjunk"
#define CHECK_EYE(addr) \
if (strcmp(addr, EYE) != 0) \
{ \
fprintf(stderr,\
"File %s, line %d, Hash check failure, bad eye %8s\n", \
__FILE__, __LINE__, addr); \
abort(); \
}
/* PE linker hash table. */
struct ppc_coff_link_hash_table
{
struct coff_link_hash_table root; /* First entry, as required */
};
static struct bfd_hash_entry *ppc_coff_link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
const char *));
/* Routine to create an entry in the link hash table. */
static struct bfd_hash_entry *
ppc_coff_link_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
struct ppc_coff_link_hash_entry *ret =
(struct ppc_coff_link_hash_entry *) entry;
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (ret == (struct ppc_coff_link_hash_entry *) NULL)
ret = (struct ppc_coff_link_hash_entry *)
bfd_hash_allocate (table,
sizeof (struct ppc_coff_link_hash_entry));
if (ret == (struct ppc_coff_link_hash_entry *) NULL)
return NULL;
/* Call the allocation method of the superclass. */
ret = ((struct ppc_coff_link_hash_entry *)
_bfd_coff_link_hash_newfunc ((struct bfd_hash_entry *) ret,
table, string));
if (ret)
{
/* Initialize the local fields. */
SET_UNALLOCATED(ret->toc_offset);
ret->symbol_is_glue = 0;
ret->glue_insn = 0;
strcpy(ret->eye_catcher, EYE);
}
return (struct bfd_hash_entry *) ret;
}
/* Initialize a PE linker hash table. */
static boolean
ppc_coff_link_hash_table_init (table, abfd, newfunc)
struct ppc_coff_link_hash_table *table;
bfd *abfd;
struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
struct bfd_hash_table *,
const char *));
{
return _bfd_coff_link_hash_table_init (&table->root, abfd, newfunc);
}
/* Create a PE linker hash table. */
static struct bfd_link_hash_table *
ppc_coff_link_hash_table_create (abfd)
bfd *abfd;
{
struct ppc_coff_link_hash_table *ret;
ret = ((struct ppc_coff_link_hash_table *)
bfd_alloc (abfd, sizeof (struct ppc_coff_link_hash_table)));
if (ret == NULL)
return NULL;
if (! ppc_coff_link_hash_table_init (ret, abfd,
ppc_coff_link_hash_newfunc))
{
bfd_release (abfd, ret);
return (struct bfd_link_hash_table *) NULL;
}
return &ret->root.root;
}
/* Now, tailor coffcode.h to use our hash stuff */
#define coff_bfd_link_hash_table_create ppc_coff_link_hash_table_create
/* 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
/* This is essentially the same as tocrel16, with TOCDEFN assumed */
#define IMAGE_REL_PPC_TOCREL16_DEFN 0x0013
/* 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 */
/* IMAGE_REL_PPC_TOCREL16_DEFN 0x0013 */
/* 16-bit offset from TOC base, without causing a definition */
/* Used: */
HOWTO ( (IMAGE_REL_PPC_TOCREL16 | IMAGE_REL_PPC_TOCDEFN), /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
0, /* special_function */
"TOCREL16, TOCDEFN", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* 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 %s\n", \
n, r->r_symndx, r->r_vaddr,\
(((r->r_type) & IMAGE_REL_PPC_TOCDEFN) == 0) \
?" ":" TOCDEFN" ); \
}
#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
};
enum ref_category
{
priv,
pub,
data
};
struct list_ele
{
struct list_ele *next;
bfd_vma addr;
enum ref_category cat;
int offset;
const char *name;
};
extern struct list_ele *head;
extern struct list_ele *tail;
static void
record_toc(toc_section, our_toc_offset, cat, name)
asection *toc_section;
int our_toc_offset;
enum ref_category cat;
const char *name;
{
/* add this entry to our toc addr-offset-name list */
struct list_ele *t;
t = bfd_malloc (sizeof (struct list_ele));
if (t == NULL)
abort ();
t->next = 0;
t->offset = our_toc_offset;
t->name = name;
t->cat = cat;
t->addr = toc_section->output_offset + our_toc_offset;
if (head == 0)
{
head = t;
tail = t;
}
else
{
tail->next = t;
tail = t;
}
}
/* 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 ppc_coff_link_hash_entry *h;
struct coff_symbol_struct *target;
int ret_val;
const char *name;
int *local_syms;
h = 0;
h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]);
if (h != 0)
{
CHECK_EYE(h->eye_catcher);
}
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)
return false;
obj_coff_local_toc_table(abfd) = local_syms;
for (i = 0; i < obj_raw_syment_count(abfd); ++i)
{
SET_UNALLOCATED(local_syms[i]);
}
}
if (IS_UNALLOCATED(local_syms[sym]))
{
local_syms[sym] = global_toc_size;
ret_val = global_toc_size;
global_toc_size += 4;
/* The size must fit in a 16bit displacment */
if (global_toc_size >= 65535)
{
fprintf(stderr,
"Exceeded toc size of 65535\n");
abort();
}
#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.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 (IS_UNALLOCATED(h->toc_offset))
{
h->toc_offset = global_toc_size;
ret_val = global_toc_size;
global_toc_size += 4;
/* The size must fit in a 16bit displacment */
if (global_toc_size >= 65535)
{
fprintf(stderr,
"Exceeded toc size of 65535\n");
abort();
}
#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;
}
/* FIXME: record a toc offset against a data-in-toc symbol */
/* Now, there is currenly some confusion on what this means. In some
compilers one sees the moral equivalent of:
.tocd
define some data
.text
refer to the data with a [tocv] qualifier
In general, one sees something to indicate that a tocd has been
seen, and that would trigger the allocation of data in toc. The IBM
docs seem to suggest that anything with the TOCDEFN qualifier should
never trigger storage allocation. However, in the kernel32.lib that
we've been using for our test bed, there are a couple of variables
referenced that fail that test.
So it can't work that way.
*/
static int
ppc_record_data_in_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 ppc_coff_link_hash_entry *h = 0;
struct coff_symbol_struct *target;
int ret_val;
const char *name;
int *local_syms;
h = (struct ppc_coff_link_hash_entry *) (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)
return false;
obj_coff_local_toc_table(abfd) = local_syms;
for (i = 0; i < obj_raw_syment_count(abfd); ++i)
{
SET_UNALLOCATED(local_syms[i]);
}
}
if (IS_UNALLOCATED(local_syms[sym]))
{
local_syms[sym] = global_toc_size;
ret_val = global_toc_size;
global_toc_size += 4;
#ifdef TOC_DEBUG
fprintf(stderr,
"Setting data_in_toc_offset for local sym %d to %d\n",
sym, ret_val);
#endif
}
else
{
ret_val = local_syms[sym];
#ifdef TOC_DEBUG
fprintf(stderr,
"data_in_toc_offset already set for local sym %d to %d\n",
sym, ret_val);
#endif
}
}
else
{
CHECK_EYE(h->eye_catcher);
name = h->root.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 (IS_UNALLOCATED(h->toc_offset))
{
#if 0
h->toc_offset = global_toc_size;
#endif
ret_val = global_toc_size;
/* We're allocating a chunk of the toc, as opposed to a slot */
/* FIXME: alignment? */
global_toc_size += 4;
#ifdef TOC_DEBUG
fprintf(stderr,
"Setting data_in_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,
"data_in_toc_offset already set for sym %d (%s) [h=%p] to %d\n",
sym, name, h, ret_val);
#endif
}
}
return ret_val;
}
/* record a toc offset against a symbol */
static void
ppc_mark_symbol_as_glue(abfd, sym, rel)
bfd *abfd;
int sym;
struct internal_reloc *rel;
{
struct ppc_coff_link_hash_entry *h;
h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]);
CHECK_EYE(h->eye_catcher);
h->symbol_is_glue = 1;
h->glue_insn = bfd_get_32 (abfd, (bfd_byte *) &rel->r_vaddr);
return;
}
/* 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_ADDR32NB)
&& (howto->type != IMAGE_REL_PPC_TOCREL16)
&& (howto->type != IMAGE_REL_PPC_IMGLUE)
&& (howto->type != IMAGE_REL_PPC_IFGLUE)
&& (howto->type != IMAGE_REL_PPC_SECREL)
&& (howto->type != IMAGE_REL_PPC_SECTION)
&& (howto->type != IMAGE_REL_PPC_SECREL16)
&& (howto->type != IMAGE_REL_PPC_REFHI)
&& (howto->type != IMAGE_REL_PPC_REFLO)
&& (howto->type != IMAGE_REL_PPC_PAIR)
&& (howto->type != IMAGE_REL_PPC_TOCREL16_DEFN) ;
}
/* 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 in bfd %s\n",
TARGET_LITTLE_NAME,
input_section->name,
input_bfd->filename);
#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 ppc_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 = (struct ppc_coff_link_hash_entry *)
(obj_coff_sym_hashes (input_bfd)[symndx]);
if (h != 0)
{
CHECK_EYE(h->eye_catcher);
}
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
{
CHECK_EYE(h->eye_catcher);
if (h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
{
sec = h->root.root.u.def.section;
val = (h->root.root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else
{
fprintf(stderr,
"missing %s\n",h->root.root.root.string);
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.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 (%s), section addr of %s %p\n",
bfd_of_toc_owner, bfd_of_toc_owner->filename,
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 (IS_WRITTEN(our_toc_offset))
{
/* if it has been written out, it is marked with the
1 bit. Fix up our offset, but do not write it out
again.
*/
MAKE_ADDR_AGAIN(our_toc_offset);
#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 */
record_toc(toc_section, our_toc_offset, priv, strdup(name));
#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);
MARK_AS_WRITTEN(local_toc_table[symndx]);
fixit = true;
}
}
else
{
const char *name = h->root.root.root.string;
our_toc_offset = h->toc_offset;
if ((r_flags & IMAGE_REL_PPC_TOCDEFN)
== IMAGE_REL_PPC_TOCDEFN )
#if 0
/* This is wrong. If tocdefn is on, we must unconditionally
assume the following path */
&& IS_UNALLOCATED(our_toc_offset))
#endif
{
/* This is unbelievable cheese. Some knowledgable asm
hacker has decided to use r2 as a base for loading
a value. He/She does this by setting the tocdefn bit,
and not supplying a toc definition. The behaviour is
then to use the difference between the value of the
symbol and the actual location of the toc as the toc
index.
In fact, what is usually happening is, because the
Import Address Table is mapped immediately following
the toc, some trippy library code trying for speed on
dll linkage, takes advantage of that and considers
the IAT to be part of the toc, thus saving a load.
*/
#ifdef DEBUG_RELOC
fprintf(stderr,
"TOCDEFN is on, (%s) (%p) our_toc_offset = %x\n",
name, h, our_toc_offset);
#endif
our_toc_offset = val -
(toc_section->output_section->vma +
toc_section->output_offset);
#ifdef DEBUG_RELOC
fprintf(stderr,
" our_toc_offset set to %x\n", our_toc_offset);
#endif
/* The size must still fit in a 16bit displacment */
if (our_toc_offset >= 65535)
{
fprintf(stderr,
"TOCDEFN Relocation exceeded "
"displacment of 65535\n");
abort();
}
record_toc(toc_section, our_toc_offset, pub, strdup(name));
}
else if (IS_WRITTEN(our_toc_offset))
{
/* if it has been written out, it is marked with the
1 bit. Fix up our offset, but do not write it out
again.
*/
MAKE_ADDR_AGAIN(our_toc_offset);
#ifdef TOC_DEBUG
fprintf(stderr,
"Not writing out toc_offset of %d for %s\n",
our_toc_offset, name);
#endif
}
else
{
record_toc(toc_section, our_toc_offset, pub, strdup(name));
#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);
MARK_AS_WRITTEN(h->toc_offset);
/* 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;
if (coff_data(output_bfd)->pe)
addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
#ifdef DEBUG_RELOC
fprintf(stderr,
" Toc Section .reloc candidate addr = %x\n", addr);
#endif
fwrite (&addr, 1,4, (FILE *) info->base_file);
}
/* FIXME: this test is conservative */
if ( (r_flags & IMAGE_REL_PPC_TOCDEFN) != IMAGE_REL_PPC_TOCDEFN &&
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 glue function or not. */
/* A glue function must announce itself via a IMGLUE reloc, and */
/* the reloc contains the required toc restore instruction */
bfd_vma x;
const char *my_name;
DUMP_RELOC2(howto->name, rel);
if (h != 0)
{
my_name = h->root.root.root.string;
if (h->symbol_is_glue == 1)
{
x = bfd_get_32(input_bfd, loc);
bfd_put_32(input_bfd, h->glue_insn, loc);
}
}
}
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:
{
const char *my_name;
if (h == 0)
my_name = (syms+symndx)->_n._n_name;
else
{
my_name = h->root.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_IMGLUE:
{
/* There is nothing to do now. This reloc was noted in the first
pass over the relocs, and the glue instruction extracted */
const char *my_name;
if (h->symbol_is_glue == 1)
break;
my_name = h->root.root.root.string;
fprintf(stderr,
"Warning: previously missed IMGLUE reloc %s <file %s, section %s>\n",
howto->name,
bfd_get_filename(input_bfd),
input_section->name);
break;
}
break;
case IMAGE_REL_PPC_ADDR32NB:
{
struct coff_link_hash_entry *myh = 0;
const char *name = 0;
DUMP_RELOC2(howto->name, rel);
if (strncmp(".idata$2",input_section->name,8) == 0 && first_thunk_address == 0)
{
/* set magic values */
int idata5offset;
struct coff_link_hash_entry *myh = 0;
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;
#ifdef DEBUG_RELOC
fprintf(stderr,
"first computation triggered fta %x, ts %d(%x), its %d(%x)\n",
first_thunk_address, thunk_size, thunk_size, import_table_size,
import_table_size);
#endif
}
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.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__";
if (target != 0)
{
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;
#ifdef DEBUG_RELOC
fprintf(stderr,
"second computation triggered fta %x, ts %d(%x), its %d(%x)\n",
first_thunk_address, thunk_size, thunk_size, import_table_size,
import_table_size);
#endif
}
}
}
rstat = _bfd_relocate_contents (howto,
input_bfd,
val -
pe_data(output_bfd)->pe_opthdr.ImageBase,
loc);
}
break;
case IMAGE_REL_PPC_REL24:
DUMP_RELOC2(howto->name, rel);
val -= (input_section->output_section->vma
+ input_section->output_offset);
rstat = _bfd_relocate_contents (howto,
input_bfd,
val,
loc);
break;
case IMAGE_REL_PPC_ADDR16:
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)
{
bfd_vma before_addr = addr;
addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
#ifdef DEBUG_RELOC
fprintf(stderr,
" adjusted down from %x to %x", before_addr, addr);
#endif
}
#ifdef DEBUG_RELOC
fprintf(stderr, "\n");
#endif
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.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)))
{
#ifdef DEBUG_RELOC
fprintf(stderr,
"pe_ppc_relocate_section (%s) for %s in bfd %s RETURNING TRUE\n",
TARGET_LITTLE_NAME,
input_section->name,
input_bfd->filename);
#endif
return false;
}
}
}
}
#ifdef DEBUG_RELOC
fprintf(stderr,
"pe_ppc_relocate_section (%s) for %s in bfd %s RETURNING TRUE\n",
TARGET_LITTLE_NAME,
input_section->name,
input_bfd->filename);
#endif
return true;
}
#ifdef COFF_IMAGE_WITH_PE
long int global_toc_size = 4;
bfd* bfd_of_toc_owner = 0;
long int import_table_size;
long int first_thunk_address;
long int thunk_size;
struct list_ele *head;
struct list_ele *tail;
static char *
h1 = "\n\t\t\tTOC MAPPING\n\n";
static char *
h2 = " TOC disassembly Comments Name\n";
static char *
h3 = " Offset spelling (if present)\n";
void
dump_toc(vfile)
void *vfile;
{
FILE *file = vfile;
struct list_ele *t;
fprintf(file, h1);
fprintf(file, h2);
fprintf(file, h3);
for(t = head; t != 0; t=t->next)
{
char *cat;
if (t->cat == priv)
cat = "private ";
else if (t->cat == pub)
cat = "public ";
else if (t->cat == data)
cat = "data-in-toc ";
if (t->offset > global_toc_size)
{
if (t->offset <= global_toc_size + thunk_size)
cat = "IAT reference ";
else
{
fprintf(file,
"**** global_toc_size %d(%x), thunk_size %d(%x)\n",
global_toc_size, global_toc_size, thunk_size, thunk_size);
cat = "Out of bounds!";
}
}
fprintf(file,
" %04lx (%d)", t->offset, t->offset - 32768);
fprintf(file,
" %s %s\n",
cat, t->name);
}
fprintf(file, "\n");
}
boolean
ppc_allocate_toc_section (info)
struct bfd_link_info *info;
{
asection *s;
bfd_byte *foo;
static char test_char = '1';
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;
#ifdef DEBUG_RELOC
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:
#if 0
/* FIXME:
This remains unimplemented for now, as it currently adds
un-necessary elements to the toc. All we need to do today
is not do anything if TOCDEFN is on.
*/
if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
toc_offset = ppc_record_data_in_toc_entry(abfd, info, sec,
rel->r_symndx,
default_toc);
else
toc_offset = ppc_record_toc_entry(abfd, info, sec,
rel->r_symndx, default_toc);
#endif
if ( (r_flags & IMAGE_REL_PPC_TOCDEFN) != IMAGE_REL_PPC_TOCDEFN )
toc_offset = ppc_record_toc_entry(abfd, info, sec,
rel->r_symndx, default_toc);
break;
case IMAGE_REL_PPC_IMGLUE:
ppc_mark_symbol_as_glue(abfd, rel->r_symndx, rel);
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.
*/
reloc_howto_type *howto;
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_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);
howto = ppc_coff_howto_table + r_type;
break;
case IMAGE_REL_PPC_IMGLUE:
DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
howto = ppc_coff_howto_table + r_type;
break;
case IMAGE_REL_PPC_TOCREL16:
DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
if (r_flags & IMAGE_REL_PPC_TOCDEFN)
howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16_DEFN;
else
howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16;
break;
default:
fprintf(stderr,
"Warning: Unsupported reloc %s [%d] used -- it may not work.\n",
ppc_coff_howto_table[r_type].name,
r_type);
howto = ppc_coff_howto_table + r_type;
break;
}
relent->howto = howto;
}
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);
/* 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;
howto = ppc_coff_howto_table + r_type;
break;
case IMAGE_REL_PPC_TOCREL16:
DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
if (r_flags & IMAGE_REL_PPC_TOCDEFN)
howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16_DEFN;
else
howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16;
break;
case IMAGE_REL_PPC_ADDR16:
case IMAGE_REL_PPC_REL24:
case IMAGE_REL_PPC_ADDR24:
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);
howto = ppc_coff_howto_table + r_type;
break;
case IMAGE_REL_PPC_IMGLUE:
DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
howto = ppc_coff_howto_table + r_type;
break;
default:
fprintf(stderr,
"Warning: Unsupported reloc %s [%d] used -- it may not work.\n",
ppc_coff_howto_table[r_type].name,
r_type);
howto = ppc_coff_howto_table + r_type;
break;
}
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_32_GOTOFF, IMAGE_REL_PPC_IMGLUE);
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_16_GOTOFF, IMAGE_REL_PPC_TOCREL16_DEFN);
HOW2MAP(BFD_RELOC_32, IMAGE_REL_PPC_ADDR32);
HOW2MAP(BFD_RELOC_RVA, IMAGE_REL_PPC_ADDR32NB);
default:
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
#define coff_bfd_final_link ppc_bfd_coff_final_link
#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
/* FIXME:
What we're trying to do here is allocate a toc section (early), and attach
it to the last bfd to be processed. This avoids the problem of having a toc
written out before all files have been processed. This code allocates
a toc section for every file, and records the last one seen. There are
at least two problems with this approach:
1. We allocate whole bunches of toc sections that are ignored, but at
at least we will not allocate a toc if no .toc is present.
2. It's not clear to me that being the last bfd read necessarily means
that you are the last bfd closed.
3. Doing it on a "swap in" hook depends on when the "swap in" is called,
and how often, etc. It's not clear to me that there isn't a hole here.
*/
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 (bfd_of_toc_owner != 0) /* we already have a toc, so go home */
return;
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
boolean
ppc_bfd_coff_final_link ();
#ifndef COFF_IMAGE_WITH_PE
static boolean
ppc_do_last(abfd)
bfd *abfd;
{
if (abfd == bfd_of_toc_owner)
return true;
else
return false;
}
static bfd *
ppc_get_last()
{
return bfd_of_toc_owner;
}
/* this piece of machinery exists only to guarantee that the bfd that holds
the toc section is written last.
This does depend on bfd_make_section attaching a new section to the
end of the section list for the bfd.
This is otherwise intended to be functionally the same as
cofflink.c:_bfd_coff_final_link(). It is specifically different only
where the POWERPC_LE_PE macro modifies the code. It is left in as a
precise form of comment. krk@cygnus.com
*/
#define POWERPC_LE_PE
/* Do the final link step. */
boolean
ppc_bfd_coff_final_link (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
bfd_size_type symesz;
struct coff_final_link_info finfo;
boolean debug_merge_allocated;
asection *o;
struct bfd_link_order *p;
size_t max_sym_count;
size_t max_lineno_count;
size_t max_reloc_count;
size_t max_output_reloc_count;
size_t max_contents_size;
file_ptr rel_filepos;
unsigned int relsz;
file_ptr line_filepos;
unsigned int linesz;
bfd *sub;
bfd_byte *external_relocs = NULL;
char strbuf[STRING_SIZE_SIZE];
symesz = bfd_coff_symesz (abfd);
finfo.info = info;
finfo.output_bfd = abfd;
finfo.strtab = NULL;
finfo.section_info = NULL;
finfo.last_file_index = -1;
finfo.internal_syms = NULL;
finfo.sec_ptrs = NULL;
finfo.sym_indices = NULL;
finfo.outsyms = NULL;
finfo.linenos = NULL;
finfo.contents = NULL;
finfo.external_relocs = NULL;
finfo.internal_relocs = NULL;
debug_merge_allocated = false;
coff_data (abfd)->link_info = info;
finfo.strtab = _bfd_stringtab_init ();
if (finfo.strtab == NULL)
goto error_return;
if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
goto error_return;
debug_merge_allocated = true;
/* Compute the file positions for all the sections. */
if (! abfd->output_has_begun)
bfd_coff_compute_section_file_positions (abfd);
/* Count the line numbers and relocation entries required for the
output file. Set the file positions for the relocs. */
rel_filepos = obj_relocbase (abfd);
relsz = bfd_coff_relsz (abfd);
max_contents_size = 0;
max_lineno_count = 0;
max_reloc_count = 0;
for (o = abfd->sections; o != NULL; o = o->next)
{
o->reloc_count = 0;
o->lineno_count = 0;
for (p = o->link_order_head; p != NULL; p = p->next)
{
if (p->type == bfd_indirect_link_order)
{
asection *sec;
sec = p->u.indirect.section;
if (info->strip == strip_none
|| info->strip == strip_some)
o->lineno_count += sec->lineno_count;
if (info->relocateable)
o->reloc_count += sec->reloc_count;
if (sec->_raw_size > max_contents_size)
max_contents_size = sec->_raw_size;
if (sec->lineno_count > max_lineno_count)
max_lineno_count = sec->lineno_count;
if (sec->reloc_count > max_reloc_count)
max_reloc_count = sec->reloc_count;
}
else if (info->relocateable
&& (p->type == bfd_section_reloc_link_order
|| p->type == bfd_symbol_reloc_link_order))
++o->reloc_count;
}
if (o->reloc_count == 0)
o->rel_filepos = 0;
else
{
o->flags |= SEC_RELOC;
o->rel_filepos = rel_filepos;
rel_filepos += o->reloc_count * relsz;
}
}
/* If doing a relocateable link, allocate space for the pointers we
need to keep. */
if (info->relocateable)
{
unsigned int i;
/* We use section_count + 1, rather than section_count, because
the target_index fields are 1 based. */
finfo.section_info =
((struct coff_link_section_info *)
bfd_malloc ((abfd->section_count + 1)
* sizeof (struct coff_link_section_info)));
if (finfo.section_info == NULL)
goto error_return;
for (i = 0; i <= abfd->section_count; i++)
{
finfo.section_info[i].relocs = NULL;
finfo.section_info[i].rel_hashes = NULL;
}
}
/* We now know the size of the relocs, so we can determine the file
positions of the line numbers. */
line_filepos = rel_filepos;
linesz = bfd_coff_linesz (abfd);
max_output_reloc_count = 0;
for (o = abfd->sections; o != NULL; o = o->next)
{
if (o->lineno_count == 0)
o->line_filepos = 0;
else
{
o->line_filepos = line_filepos;
line_filepos += o->lineno_count * linesz;
}
if (o->reloc_count != 0)
{
/* We don't know the indices of global symbols until we have
written out all the local symbols. For each section in
the output file, we keep an array of pointers to hash
table entries. Each entry in the array corresponds to a
reloc. When we find a reloc against a global symbol, we
set the corresponding entry in this array so that we can
fix up the symbol index after we have written out all the
local symbols.
Because of this problem, we also keep the relocs in
memory until the end of the link. This wastes memory,
but only when doing a relocateable link, which is not the
common case. */
BFD_ASSERT (info->relocateable);
finfo.section_info[o->target_index].relocs =
((struct internal_reloc *)
bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
finfo.section_info[o->target_index].rel_hashes =
((struct coff_link_hash_entry **)
bfd_malloc (o->reloc_count
* sizeof (struct coff_link_hash_entry *)));
if (finfo.section_info[o->target_index].relocs == NULL
|| finfo.section_info[o->target_index].rel_hashes == NULL)
goto error_return;
if (o->reloc_count > max_output_reloc_count)
max_output_reloc_count = o->reloc_count;
}
/* Reset the reloc and lineno counts, so that we can use them to
count the number of entries we have output so far. */
o->reloc_count = 0;
o->lineno_count = 0;
}
obj_sym_filepos (abfd) = line_filepos;
/* Figure out the largest number of symbols in an input BFD. Take
the opportunity to clear the output_has_begun fields of all the
input BFD's. */
max_sym_count = 0;
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
{
size_t sz;
sub->output_has_begun = false;
sz = obj_raw_syment_count (sub);
if (sz > max_sym_count)
max_sym_count = sz;
}
/* Allocate some buffers used while linking. */
finfo.internal_syms = ((struct internal_syment *)
bfd_malloc (max_sym_count
* sizeof (struct internal_syment)));
finfo.sec_ptrs = (asection **) bfd_malloc (max_sym_count
* sizeof (asection *));
finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
finfo.outsyms = ((bfd_byte *)
bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
* bfd_coff_linesz (abfd));
finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
if (! info->relocateable)
finfo.internal_relocs = ((struct internal_reloc *)
bfd_malloc (max_reloc_count
* sizeof (struct internal_reloc)));
if ((finfo.internal_syms == NULL && max_sym_count > 0)
|| (finfo.sec_ptrs == NULL && max_sym_count > 0)
|| (finfo.sym_indices == NULL && max_sym_count > 0)
|| finfo.outsyms == NULL
|| (finfo.linenos == NULL && max_lineno_count > 0)
|| (finfo.contents == NULL && max_contents_size > 0)
|| (finfo.external_relocs == NULL && max_reloc_count > 0)
|| (! info->relocateable
&& finfo.internal_relocs == NULL
&& max_reloc_count > 0))
goto error_return;
/* We now know the position of everything in the file, except that
we don't know the size of the symbol table and therefore we don't
know where the string table starts. We just build the string
table in memory as we go along. We process all the relocations
for a single input file at once. */
obj_raw_syment_count (abfd) = 0;
if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
{
if (! bfd_coff_start_final_link (abfd, info))
goto error_return;
}
for (o = abfd->sections; o != NULL; o = o->next)
{
for (p = o->link_order_head; p != NULL; p = p->next)
{
if (p->type == bfd_indirect_link_order
&& (bfd_get_flavour (p->u.indirect.section->owner)
== bfd_target_coff_flavour))
{
sub = p->u.indirect.section->owner;
#ifdef POWERPC_LE_PE
if (! sub->output_has_begun && !ppc_do_last(sub))
#else
if (! sub->output_has_begun)
#endif
{
if (! coff_link_input_bfd (&finfo, sub))
goto error_return;
sub->output_has_begun = true;
}
}
else if (p->type == bfd_section_reloc_link_order
|| p->type == bfd_symbol_reloc_link_order)
{
if (! coff_reloc_link_order (abfd, &finfo, o, p))
goto error_return;
}
else
{
if (! _bfd_default_link_order (abfd, info, o, p))
goto error_return;
}
}
}
#ifdef POWERPC_LE_PE
{
extern bfd* ppc_get_last();
bfd* last_one = ppc_get_last();
if (last_one)
{
if (! coff_link_input_bfd (&finfo, last_one))
goto error_return;
}
last_one->output_has_begun = true;
}
#endif
/* Free up the buffers used by coff_link_input_bfd. */
coff_debug_merge_hash_table_free (&finfo.debug_merge);
debug_merge_allocated = false;
if (finfo.internal_syms != NULL)
{
free (finfo.internal_syms);
finfo.internal_syms = NULL;
}
if (finfo.sec_ptrs != NULL)
{
free (finfo.sec_ptrs);
finfo.sec_ptrs = NULL;
}
if (finfo.sym_indices != NULL)
{
free (finfo.sym_indices);
finfo.sym_indices = NULL;
}
if (finfo.linenos != NULL)
{
free (finfo.linenos);
finfo.linenos = NULL;
}
if (finfo.contents != NULL)
{
free (finfo.contents);
finfo.contents = NULL;
}
if (finfo.external_relocs != NULL)
{
free (finfo.external_relocs);
finfo.external_relocs = NULL;
}
if (finfo.internal_relocs != NULL)
{
free (finfo.internal_relocs);
finfo.internal_relocs = NULL;
}
/* The value of the last C_FILE symbol is supposed to be the symbol
index of the first external symbol. Write it out again if
necessary. */
if (finfo.last_file_index != -1
&& (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd))
{
finfo.last_file.n_value = obj_raw_syment_count (abfd);
bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
(PTR) finfo.outsyms);
if (bfd_seek (abfd,
(obj_sym_filepos (abfd)
+ finfo.last_file_index * symesz),
SEEK_SET) != 0
|| bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
return false;
}
/* Write out the global symbols. */
finfo.failed = false;
coff_link_hash_traverse (coff_hash_table (info), coff_write_global_sym,
(PTR) &finfo);
if (finfo.failed)
goto error_return;
/* The outsyms buffer is used by coff_write_global_sym. */
if (finfo.outsyms != NULL)
{
free (finfo.outsyms);
finfo.outsyms = NULL;
}
if (info->relocateable)
{
/* Now that we have written out all the global symbols, we know
the symbol indices to use for relocs against them, and we can
finally write out the relocs. */
external_relocs = ((bfd_byte *)
bfd_malloc (max_output_reloc_count * relsz));
if (external_relocs == NULL)
goto error_return;
for (o = abfd->sections; o != NULL; o = o->next)
{
struct internal_reloc *irel;
struct internal_reloc *irelend;
struct coff_link_hash_entry **rel_hash;
bfd_byte *erel;
if (o->reloc_count == 0)
continue;
irel = finfo.section_info[o->target_index].relocs;
irelend = irel + o->reloc_count;
rel_hash = finfo.section_info[o->target_index].rel_hashes;
erel = external_relocs;
for (; irel < irelend; irel++, rel_hash++, erel += relsz)
{
if (*rel_hash != NULL)
{
BFD_ASSERT ((*rel_hash)->indx >= 0);
irel->r_symndx = (*rel_hash)->indx;
}
bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
}
if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
|| bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
abfd) != relsz * o->reloc_count)
goto error_return;
}
free (external_relocs);
external_relocs = NULL;
}
/* Free up the section information. */
if (finfo.section_info != NULL)
{
unsigned int i;
for (i = 0; i < abfd->section_count; i++)
{
if (finfo.section_info[i].relocs != NULL)
free (finfo.section_info[i].relocs);
if (finfo.section_info[i].rel_hashes != NULL)
free (finfo.section_info[i].rel_hashes);
}
free (finfo.section_info);
finfo.section_info = NULL;
}
/* Write out the string table. */
if (obj_raw_syment_count (abfd) != 0)
{
if (bfd_seek (abfd,
(obj_sym_filepos (abfd)
+ obj_raw_syment_count (abfd) * symesz),
SEEK_SET) != 0)
return false;
#if STRING_SIZE_SIZE == 4
bfd_h_put_32 (abfd,
_bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
(bfd_byte *) strbuf);
#else
#error Change bfd_h_put_32
#endif
if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
return false;
if (! _bfd_stringtab_emit (abfd, finfo.strtab))
return false;
}
_bfd_stringtab_free (finfo.strtab);
/* Setting bfd_get_symcount to 0 will cause write_object_contents to
not try to write out the symbols. */
bfd_get_symcount (abfd) = 0;
return true;
error_return:
if (debug_merge_allocated)
coff_debug_merge_hash_table_free (&finfo.debug_merge);
if (finfo.strtab != NULL)
_bfd_stringtab_free (finfo.strtab);
if (finfo.section_info != NULL)
{
unsigned int i;
for (i = 0; i < abfd->section_count; i++)
{
if (finfo.section_info[i].relocs != NULL)
free (finfo.section_info[i].relocs);
if (finfo.section_info[i].rel_hashes != NULL)
free (finfo.section_info[i].rel_hashes);
}
free (finfo.section_info);
}
if (finfo.internal_syms != NULL)
free (finfo.internal_syms);
if (finfo.sec_ptrs != NULL)
free (finfo.sec_ptrs);
if (finfo.sym_indices != NULL)
free (finfo.sym_indices);
if (finfo.outsyms != NULL)
free (finfo.outsyms);
if (finfo.linenos != NULL)
free (finfo.linenos);
if (finfo.contents != NULL)
free (finfo.contents);
if (finfo.external_relocs != NULL)
free (finfo.external_relocs);
if (finfo.internal_relocs != NULL)
free (finfo.internal_relocs);
if (external_relocs != NULL)
free (external_relocs);
return false;
}
#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,
BFD_ENDIAN_LITTLE, /* data byte order is little */
BFD_ENDIAN_LITTLE, /* 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,
BFD_ENDIAN_BIG, /* data byte order is big */
BFD_ENDIAN_BIG, /* 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
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