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binutils-gdb/bfd/coff-ppc.c

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/* 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
- 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"
/* 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. */
ret->toc_offset = 1;
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)
{
bfd_set_error (bfd_error_no_memory);
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
/* 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 :-) */
#define DEBUG_RELOC
#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
};
struct list_ele
{
struct list_ele *next;
bfd_vma addr;
int offset;
const char *name;
};
extern struct list_ele *head;
extern struct list_ele *tail;
static void
record_toc(toc_section, our_toc_offset, name)
asection *toc_section;
int our_toc_offset;
const char *name;
{
/* add this entry to our toc addr-offset-name list */
struct list_ele *t;
t = malloc(sizeof(struct list_ele));
t->next = 0;
t->offset = our_toc_offset;
t->name = name;
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)
{
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.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;
}
/* 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_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 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
{
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, 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();
}
}
#if 0
if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
{
/* Somehow, we are to assume that the toc has already been
done for this one, and the offset is the value of
the symbol? */
fprintf(stderr,
"Symbol value %d\n", val);
}
#endif
/*
* 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 */
record_toc(toc_section, our_toc_offset, 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);
local_toc_table[symndx] |= 1;
fixit = true;
}
}
else
{
const char *name = h->root.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
{
record_toc(toc_section, our_toc_offset, 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);
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 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 (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__";
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.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;
struct list_ele *head;
struct list_ele *tail;
void
dump_toc(vfile)
void *vfile;
{
FILE *file = vfile;
struct list_ele *t;
fprintf(file,
" Offset Offset Name if present\n");
for(t = head; t != 0; t=t->next)
{
fprintf(file,
" %2x %04lx %s\n",
t->offset - 32768, t->offset, t->name);
}
}
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;
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.
*/
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);
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);
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
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