844 lines
25 KiB
C
844 lines
25 KiB
C
/* BFD support for the ns32k architecture.
|
|
Copyright (C) 1990, 91, 94, 95, 1996 Free Software Foundation, Inc.
|
|
Almost totally rewritten by Ian Dall from initial work
|
|
by Andrew Cagney.
|
|
|
|
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#include "bfd.h"
|
|
#include "sysdep.h"
|
|
#include "libbfd.h"
|
|
#include "ns32k.h"
|
|
|
|
#define N(machine, printable, d, next) \
|
|
{ 32, 32, 8, bfd_arch_ns32k, machine, "ns32k",printable,3,d,bfd_default_compatible,bfd_default_scan, next, }
|
|
|
|
static const bfd_arch_info_type arch_info_struct[] =
|
|
{
|
|
N(32532,"ns32k:32532",true, 0), /* the word ns32k will match this too */
|
|
};
|
|
|
|
const bfd_arch_info_type bfd_ns32k_arch =
|
|
N(32032,"ns32k:32032",false, &arch_info_struct[0]);
|
|
|
|
static long
|
|
ns32k_sign_extend(value, bits)
|
|
int value;
|
|
int bits;
|
|
{
|
|
value = value & ((1 << bits) - 1);
|
|
return (value & (1 << (bits-1))
|
|
? value | (~((1 << bits) - 1))
|
|
: value);
|
|
}
|
|
|
|
long
|
|
_bfd_ns32k_get_displacement(buffer, offset, size)
|
|
bfd_byte *buffer;
|
|
long offset;
|
|
long size;
|
|
{
|
|
long value;
|
|
buffer += offset;
|
|
switch (size)
|
|
{
|
|
case 1:
|
|
value = ns32k_sign_extend (*buffer, 7);
|
|
break;
|
|
case 2:
|
|
value = ns32k_sign_extend(*buffer++, 6);
|
|
value = (value << 8) | (0xff & *buffer);
|
|
break;
|
|
case 4:
|
|
value = ns32k_sign_extend(*buffer++, 6);
|
|
value = (value << 8) | (0xff & *buffer++);
|
|
value = (value << 8) | (0xff & *buffer++);
|
|
value = (value << 8) | (0xff & *buffer);
|
|
break;
|
|
}
|
|
return value;
|
|
}
|
|
|
|
int
|
|
_bfd_ns32k_put_displacement(value, buffer, offset, size)
|
|
long value;
|
|
bfd_byte *buffer;
|
|
long offset;
|
|
long size;
|
|
{
|
|
buffer += offset;
|
|
switch (size)
|
|
{
|
|
case 1:
|
|
if (value < -64 || value > 63)
|
|
return -1;
|
|
value&=0x7f;
|
|
*buffer++=value;
|
|
break;
|
|
case 2:
|
|
if (value < -8192 || value > 8191)
|
|
return -1;
|
|
value&=0x3fff;
|
|
value|=0x8000;
|
|
*buffer++=(value>>8);
|
|
*buffer++=value;
|
|
break;
|
|
case 4:
|
|
if (value < -0x1f000000 || value >= 0x20000000)
|
|
return -1;
|
|
value|=0xc0000000;
|
|
*buffer++=(value>>24);
|
|
*buffer++=(value>>16);
|
|
*buffer++=(value>>8);
|
|
*buffer++=value;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
long
|
|
_bfd_ns32k_get_immediate (buffer, offset, size)
|
|
bfd_byte *buffer;
|
|
long offset;
|
|
long size;
|
|
{
|
|
long value = 0;
|
|
buffer += offset;
|
|
switch (size)
|
|
{
|
|
case 4:
|
|
value = (value << 8) | (*buffer++ & 0xff);
|
|
case 3:
|
|
value = (value << 8) | (*buffer++ & 0xff);
|
|
case 2:
|
|
value = (value << 8) | (*buffer++ & 0xff);
|
|
case 1:
|
|
value = (value << 8) | (*buffer++ & 0xff);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
int
|
|
_bfd_ns32k_put_immediate (value, buffer, offset, size)
|
|
long value;
|
|
bfd_byte *buffer;
|
|
long offset;
|
|
long size;
|
|
{
|
|
buffer += offset + size - 1;
|
|
switch (size)
|
|
{
|
|
case 4:
|
|
*buffer-- = (value & 0xff); value >>= 8;
|
|
case 3:
|
|
*buffer-- = (value & 0xff); value >>= 8;
|
|
case 2:
|
|
*buffer-- = (value & 0xff); value >>= 8;
|
|
case 1:
|
|
*buffer-- = (value & 0xff); value >>= 8;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* This is just like the standard perform_relocation except we
|
|
* use get_data and put_data which know about the ns32k
|
|
* storage methods.
|
|
* This is probably a lot more complicated than it needs to be!
|
|
*/
|
|
static bfd_reloc_status_type
|
|
do_ns32k_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
|
|
error_message, get_data, put_data)
|
|
bfd *abfd;
|
|
arelent *reloc_entry;
|
|
struct symbol_cache_entry *symbol;
|
|
PTR data;
|
|
asection *input_section;
|
|
bfd *output_bfd;
|
|
char **error_message;
|
|
long (*get_data)();
|
|
int (*put_data)();
|
|
{
|
|
int overflow = 0;
|
|
bfd_vma relocation;
|
|
bfd_reloc_status_type flag = bfd_reloc_ok;
|
|
bfd_size_type addr = reloc_entry->address;
|
|
bfd_vma output_base = 0;
|
|
reloc_howto_type *howto = reloc_entry->howto;
|
|
asection *reloc_target_output_section;
|
|
|
|
if ((symbol->section == &bfd_abs_section)
|
|
&& output_bfd != (bfd *) NULL)
|
|
{
|
|
reloc_entry->address += input_section->output_offset;
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* If we are not producing relocateable output, return an error if
|
|
the symbol is not defined. An undefined weak symbol is
|
|
considered to have a value of zero (SVR4 ABI, p. 4-27). */
|
|
if (symbol->section == &bfd_und_section
|
|
&& (symbol->flags & BSF_WEAK) == 0
|
|
&& output_bfd == (bfd *) NULL)
|
|
flag = bfd_reloc_undefined;
|
|
|
|
|
|
/* Is the address of the relocation really within the section? */
|
|
if (reloc_entry->address > input_section->_cooked_size)
|
|
return bfd_reloc_outofrange;
|
|
|
|
/* Work out which section the relocation is targetted at and the
|
|
initial relocation command value. */
|
|
|
|
/* Get symbol value. (Common symbols are special.) */
|
|
if (bfd_is_com_section (symbol->section))
|
|
relocation = 0;
|
|
else
|
|
relocation = symbol->value;
|
|
|
|
|
|
reloc_target_output_section = symbol->section->output_section;
|
|
|
|
/* Convert input-section-relative symbol value to absolute. */
|
|
if (output_bfd && howto->partial_inplace == false)
|
|
output_base = 0;
|
|
else
|
|
output_base = reloc_target_output_section->vma;
|
|
|
|
relocation += output_base + symbol->section->output_offset;
|
|
|
|
/* Add in supplied addend. */
|
|
relocation += reloc_entry->addend;
|
|
|
|
/* Here the variable relocation holds the final address of the
|
|
symbol we are relocating against, plus any addend. */
|
|
|
|
if (howto->pc_relative == true)
|
|
{
|
|
/* This is a PC relative relocation. We want to set RELOCATION
|
|
to the distance between the address of the symbol and the
|
|
location. RELOCATION is already the address of the symbol.
|
|
|
|
We start by subtracting the address of the section containing
|
|
the location.
|
|
|
|
If pcrel_offset is set, we must further subtract the position
|
|
of the location within the section. Some targets arrange for
|
|
the addend to be the negative of the position of the location
|
|
within the section; for example, i386-aout does this. For
|
|
i386-aout, pcrel_offset is false. Some other targets do not
|
|
include the position of the location; for example, m88kbcs,
|
|
or ELF. For those targets, pcrel_offset is true.
|
|
|
|
If we are producing relocateable output, then we must ensure
|
|
that this reloc will be correctly computed when the final
|
|
relocation is done. If pcrel_offset is false we want to wind
|
|
up with the negative of the location within the section,
|
|
which means we must adjust the existing addend by the change
|
|
in the location within the section. If pcrel_offset is true
|
|
we do not want to adjust the existing addend at all.
|
|
|
|
FIXME: This seems logical to me, but for the case of
|
|
producing relocateable output it is not what the code
|
|
actually does. I don't want to change it, because it seems
|
|
far too likely that something will break. */
|
|
|
|
relocation -=
|
|
input_section->output_section->vma + input_section->output_offset;
|
|
|
|
if (howto->pcrel_offset == true)
|
|
relocation -= reloc_entry->address;
|
|
}
|
|
|
|
if (output_bfd != (bfd *) NULL)
|
|
{
|
|
if (howto->partial_inplace == false)
|
|
{
|
|
/* This is a partial relocation, and we want to apply the relocation
|
|
to the reloc entry rather than the raw data. Modify the reloc
|
|
inplace to reflect what we now know. */
|
|
reloc_entry->addend = relocation;
|
|
reloc_entry->address += input_section->output_offset;
|
|
return flag;
|
|
}
|
|
else
|
|
{
|
|
/* This is a partial relocation, but inplace, so modify the
|
|
reloc record a bit.
|
|
|
|
If we've relocated with a symbol with a section, change
|
|
into a ref to the section belonging to the symbol. */
|
|
|
|
reloc_entry->address += input_section->output_offset;
|
|
|
|
/* WTF?? */
|
|
if (abfd->xvec->flavour == bfd_target_coff_flavour
|
|
&& strcmp (abfd->xvec->name, "aixcoff-rs6000") != 0)
|
|
{
|
|
#if 1
|
|
/* For m68k-coff, the addend was being subtracted twice during
|
|
relocation with -r. Removing the line below this comment
|
|
fixes that problem; see PR 2953.
|
|
|
|
However, Ian wrote the following, regarding removing the line below,
|
|
which explains why it is still enabled: --djm
|
|
|
|
If you put a patch like that into BFD you need to check all the COFF
|
|
linkers. I am fairly certain that patch will break coff-i386 (e.g.,
|
|
SCO); see coff_i386_reloc in coff-i386.c where I worked around the
|
|
problem in a different way. There may very well be a reason that the
|
|
code works as it does.
|
|
|
|
Hmmm. The first obvious point is that bfd_perform_relocation should
|
|
not have any tests that depend upon the flavour. It's seem like
|
|
entirely the wrong place for such a thing. The second obvious point
|
|
is that the current code ignores the reloc addend when producing
|
|
relocateable output for COFF. That's peculiar. In fact, I really
|
|
have no idea what the point of the line you want to remove is.
|
|
|
|
A typical COFF reloc subtracts the old value of the symbol and adds in
|
|
the new value to the location in the object file (if it's a pc
|
|
relative reloc it adds the difference between the symbol value and the
|
|
location). When relocating we need to preserve that property.
|
|
|
|
BFD handles this by setting the addend to the negative of the old
|
|
value of the symbol. Unfortunately it handles common symbols in a
|
|
non-standard way (it doesn't subtract the old value) but that's a
|
|
different story (we can't change it without losing backward
|
|
compatibility with old object files) (coff-i386 does subtract the old
|
|
value, to be compatible with existing coff-i386 targets, like SCO).
|
|
|
|
So everything works fine when not producing relocateable output. When
|
|
we are producing relocateable output, logically we should do exactly
|
|
what we do when not producing relocateable output. Therefore, your
|
|
patch is correct. In fact, it should probably always just set
|
|
reloc_entry->addend to 0 for all cases, since it is, in fact, going to
|
|
add the value into the object file. This won't hurt the COFF code,
|
|
which doesn't use the addend; I'm not sure what it will do to other
|
|
formats (the thing to check for would be whether any formats both use
|
|
the addend and set partial_inplace).
|
|
|
|
When I wanted to make coff-i386 produce relocateable output, I ran
|
|
into the problem that you are running into: I wanted to remove that
|
|
line. Rather than risk it, I made the coff-i386 relocs use a special
|
|
function; it's coff_i386_reloc in coff-i386.c. The function
|
|
specifically adds the addend field into the object file, knowing that
|
|
bfd_perform_relocation is not going to. If you remove that line, then
|
|
coff-i386.c will wind up adding the addend field in twice. It's
|
|
trivial to fix; it just needs to be done.
|
|
|
|
The problem with removing the line is just that it may break some
|
|
working code. With BFD it's hard to be sure of anything. The right
|
|
way to deal with this is simply to build and test at least all the
|
|
supported COFF targets. It should be straightforward if time and disk
|
|
space consuming. For each target:
|
|
1) build the linker
|
|
2) generate some executable, and link it using -r (I would
|
|
probably use paranoia.o and link against newlib/libc.a, which
|
|
for all the supported targets would be available in
|
|
/usr/cygnus/progressive/H-host/target/lib/libc.a).
|
|
3) make the change to reloc.c
|
|
4) rebuild the linker
|
|
5) repeat step 2
|
|
6) if the resulting object files are the same, you have at least
|
|
made it no worse
|
|
7) if they are different you have to figure out which version is
|
|
right
|
|
*/
|
|
relocation -= reloc_entry->addend;
|
|
#endif
|
|
reloc_entry->addend = 0;
|
|
}
|
|
else
|
|
{
|
|
reloc_entry->addend = relocation;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
reloc_entry->addend = 0;
|
|
}
|
|
|
|
/* FIXME: This overflow checking is incomplete, because the value
|
|
might have overflowed before we get here. For a correct check we
|
|
need to compute the value in a size larger than bitsize, but we
|
|
can't reasonably do that for a reloc the same size as a host
|
|
machine word.
|
|
FIXME: We should also do overflow checking on the result after
|
|
adding in the value contained in the object file. */
|
|
if (howto->complain_on_overflow != complain_overflow_dont)
|
|
{
|
|
bfd_vma check;
|
|
|
|
/* Get the value that will be used for the relocation, but
|
|
starting at bit position zero. */
|
|
if (howto->rightshift > howto->bitpos)
|
|
check = relocation >> (howto->rightshift - howto->bitpos);
|
|
else
|
|
check = relocation << (howto->bitpos - howto->rightshift);
|
|
switch (howto->complain_on_overflow)
|
|
{
|
|
case complain_overflow_signed:
|
|
{
|
|
/* Assumes two's complement. */
|
|
bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
|
|
bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
|
|
|
|
/* The above right shift is incorrect for a signed value.
|
|
Fix it up by forcing on the upper bits. */
|
|
if (howto->rightshift > howto->bitpos
|
|
&& (bfd_signed_vma) relocation < 0)
|
|
check |= ((bfd_vma) - 1
|
|
& ~((bfd_vma) - 1
|
|
>> (howto->rightshift - howto->bitpos)));
|
|
if ((bfd_signed_vma) check > reloc_signed_max
|
|
|| (bfd_signed_vma) check < reloc_signed_min)
|
|
flag = bfd_reloc_overflow;
|
|
}
|
|
break;
|
|
case complain_overflow_unsigned:
|
|
{
|
|
/* Assumes two's complement. This expression avoids
|
|
overflow if howto->bitsize is the number of bits in
|
|
bfd_vma. */
|
|
bfd_vma reloc_unsigned_max =
|
|
(((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
|
|
|
if ((bfd_vma) check > reloc_unsigned_max)
|
|
flag = bfd_reloc_overflow;
|
|
}
|
|
break;
|
|
case complain_overflow_bitfield:
|
|
{
|
|
/* Assumes two's complement. This expression avoids
|
|
overflow if howto->bitsize is the number of bits in
|
|
bfd_vma. */
|
|
bfd_vma reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
|
|
|
if (((bfd_vma) check & ~reloc_bits) != 0
|
|
&& ((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
|
|
{
|
|
/* The above right shift is incorrect for a signed
|
|
value. See if turning on the upper bits fixes the
|
|
overflow. */
|
|
if (howto->rightshift > howto->bitpos
|
|
&& (bfd_signed_vma) relocation < 0)
|
|
{
|
|
check |= ((bfd_vma) - 1
|
|
& ~((bfd_vma) - 1
|
|
>> (howto->rightshift - howto->bitpos)));
|
|
if (((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
|
|
flag = bfd_reloc_overflow;
|
|
}
|
|
else
|
|
flag = bfd_reloc_overflow;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/*
|
|
Either we are relocating all the way, or we don't want to apply
|
|
the relocation to the reloc entry (probably because there isn't
|
|
any room in the output format to describe addends to relocs)
|
|
*/
|
|
|
|
/* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler
|
|
(OSF version 1.3, compiler version 3.11). It miscompiles the
|
|
following program:
|
|
|
|
struct str
|
|
{
|
|
unsigned int i0;
|
|
} s = { 0 };
|
|
|
|
int
|
|
main ()
|
|
{
|
|
unsigned long x;
|
|
|
|
x = 0x100000000;
|
|
x <<= (unsigned long) s.i0;
|
|
if (x == 0)
|
|
printf ("failed\n");
|
|
else
|
|
printf ("succeeded (%lx)\n", x);
|
|
}
|
|
*/
|
|
|
|
relocation >>= (bfd_vma) howto->rightshift;
|
|
|
|
/* Shift everything up to where it's going to be used */
|
|
|
|
relocation <<= (bfd_vma) howto->bitpos;
|
|
|
|
/* Wait for the day when all have the mask in them */
|
|
|
|
/* What we do:
|
|
i instruction to be left alone
|
|
o offset within instruction
|
|
r relocation offset to apply
|
|
S src mask
|
|
D dst mask
|
|
N ~dst mask
|
|
A part 1
|
|
B part 2
|
|
R result
|
|
|
|
Do this:
|
|
i i i i i o o o o o from bfd_get<size>
|
|
and S S S S S to get the size offset we want
|
|
+ r r r r r r r r r r to get the final value to place
|
|
and D D D D D to chop to right size
|
|
-----------------------
|
|
A A A A A
|
|
And this:
|
|
... i i i i i o o o o o from bfd_get<size>
|
|
and N N N N N get instruction
|
|
-----------------------
|
|
... B B B B B
|
|
|
|
And then:
|
|
B B B B B
|
|
or A A A A A
|
|
-----------------------
|
|
R R R R R R R R R R put into bfd_put<size>
|
|
*/
|
|
|
|
#define DOIT(x) \
|
|
x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask))
|
|
|
|
switch (howto->size)
|
|
{
|
|
case 0:
|
|
{
|
|
char x = get_data (data, addr, 1);
|
|
DOIT (x);
|
|
overflow = put_data(x, data, addr, 1);
|
|
}
|
|
break;
|
|
|
|
case 1:
|
|
if (relocation)
|
|
{
|
|
short x = get_data (data, addr, 2);
|
|
DOIT (x);
|
|
overflow = put_data(x, (unsigned char *) data, addr, 2);
|
|
}
|
|
break;
|
|
case 2:
|
|
if (relocation)
|
|
{
|
|
long x = get_data (data, addr, 4);
|
|
DOIT (x);
|
|
overflow = put_data(x, data, addr, 4);
|
|
}
|
|
break;
|
|
case -2:
|
|
{
|
|
long x = get_data(data, addr, 4);
|
|
relocation = -relocation;
|
|
DOIT(x);
|
|
overflow = put_data(x, data , addr, 4);
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
/* Do nothing */
|
|
break;
|
|
|
|
case 4:
|
|
#ifdef BFD64
|
|
if (relocation)
|
|
{
|
|
bfd_vma x = get_data (data, addr, 8);
|
|
DOIT (x);
|
|
overflow = put_data(x, data, addr, 8);
|
|
}
|
|
#else
|
|
abort ();
|
|
#endif
|
|
break;
|
|
default:
|
|
return bfd_reloc_other;
|
|
}
|
|
if ((howto->complain_on_overflow != complain_overflow_dont) && overflow)
|
|
return bfd_reloc_overflow;
|
|
|
|
return flag;
|
|
}
|
|
|
|
/* Relocate a given location using a given value and howto. */
|
|
|
|
bfd_reloc_status_type
|
|
_bfd_do_ns32k_reloc_contents ( howto, input_bfd, relocation, location,
|
|
get_data, put_data)
|
|
reloc_howto_type *howto;
|
|
bfd *input_bfd;
|
|
bfd_vma relocation;
|
|
bfd_byte *location;
|
|
long (*get_data)();
|
|
int (*put_data)();
|
|
{
|
|
int size;
|
|
bfd_vma x;
|
|
boolean overflow;
|
|
|
|
/* If the size is negative, negate RELOCATION. This isn't very
|
|
general. */
|
|
if (howto->size < 0)
|
|
relocation = -relocation;
|
|
|
|
/* Get the value we are going to relocate. */
|
|
size = bfd_get_reloc_size (howto);
|
|
switch (size)
|
|
{
|
|
default:
|
|
case 0:
|
|
abort ();
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
#ifdef BFD64
|
|
case 8:
|
|
#endif
|
|
x = get_data (location, 0, size);
|
|
break;
|
|
}
|
|
|
|
/* Check for overflow. FIXME: We may drop bits during the addition
|
|
which we don't check for. We must either check at every single
|
|
operation, which would be tedious, or we must do the computations
|
|
in a type larger than bfd_vma, which would be inefficient. */
|
|
overflow = false;
|
|
if (howto->complain_on_overflow != complain_overflow_dont)
|
|
{
|
|
bfd_vma check;
|
|
bfd_signed_vma signed_check;
|
|
bfd_vma add;
|
|
bfd_signed_vma signed_add;
|
|
|
|
if (howto->rightshift == 0)
|
|
{
|
|
check = relocation;
|
|
signed_check = (bfd_signed_vma) relocation;
|
|
}
|
|
else
|
|
{
|
|
/* Drop unwanted bits from the value we are relocating to. */
|
|
check = relocation >> howto->rightshift;
|
|
|
|
/* If this is a signed value, the rightshift just dropped
|
|
leading 1 bits (assuming twos complement). */
|
|
if ((bfd_signed_vma) relocation >= 0)
|
|
signed_check = check;
|
|
else
|
|
signed_check = (check
|
|
| ((bfd_vma) - 1
|
|
& ~((bfd_vma) - 1 >> howto->rightshift)));
|
|
}
|
|
|
|
/* Get the value from the object file. */
|
|
add = x & howto->src_mask;
|
|
|
|
/* Get the value from the object file with an appropriate sign.
|
|
The expression involving howto->src_mask isolates the upper
|
|
bit of src_mask. If that bit is set in the value we are
|
|
adding, it is negative, and we subtract out that number times
|
|
two. If src_mask includes the highest possible bit, then we
|
|
can not get the upper bit, but that does not matter since
|
|
signed_add needs no adjustment to become negative in that
|
|
case. */
|
|
signed_add = add;
|
|
if ((add & (((~howto->src_mask) >> 1) & howto->src_mask)) != 0)
|
|
signed_add -= (((~howto->src_mask) >> 1) & howto->src_mask) << 1;
|
|
|
|
/* Add the value from the object file, shifted so that it is a
|
|
straight number. */
|
|
if (howto->bitpos == 0)
|
|
{
|
|
check += add;
|
|
signed_check += signed_add;
|
|
}
|
|
else
|
|
{
|
|
check += add >> howto->bitpos;
|
|
|
|
/* For the signed case we use ADD, rather than SIGNED_ADD,
|
|
to avoid warnings from SVR4 cc. This is OK since we
|
|
explictly handle the sign bits. */
|
|
if (signed_add >= 0)
|
|
signed_check += add >> howto->bitpos;
|
|
else
|
|
signed_check += ((add >> howto->bitpos)
|
|
| ((bfd_vma) - 1
|
|
& ~((bfd_vma) - 1 >> howto->bitpos)));
|
|
}
|
|
|
|
switch (howto->complain_on_overflow)
|
|
{
|
|
case complain_overflow_signed:
|
|
{
|
|
/* Assumes two's complement. */
|
|
bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
|
|
bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
|
|
|
|
if (signed_check > reloc_signed_max
|
|
|| signed_check < reloc_signed_min)
|
|
overflow = true;
|
|
}
|
|
break;
|
|
case complain_overflow_unsigned:
|
|
{
|
|
/* Assumes two's complement. This expression avoids
|
|
overflow if howto->bitsize is the number of bits in
|
|
bfd_vma. */
|
|
bfd_vma reloc_unsigned_max =
|
|
(((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
|
|
|
if (check > reloc_unsigned_max)
|
|
overflow = true;
|
|
}
|
|
break;
|
|
case complain_overflow_bitfield:
|
|
{
|
|
/* Assumes two's complement. This expression avoids
|
|
overflow if howto->bitsize is the number of bits in
|
|
bfd_vma. */
|
|
bfd_vma reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
|
|
|
|
if ((check & ~reloc_bits) != 0
|
|
&& (((bfd_vma) signed_check & ~reloc_bits)
|
|
!= (-1 & ~reloc_bits)))
|
|
overflow = true;
|
|
}
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/* Put RELOCATION in the right bits. */
|
|
relocation >>= (bfd_vma) howto->rightshift;
|
|
relocation <<= (bfd_vma) howto->bitpos;
|
|
|
|
/* Add RELOCATION to the right bits of X. */
|
|
x = ((x & ~howto->dst_mask)
|
|
| (((x & howto->src_mask) + relocation) & howto->dst_mask));
|
|
|
|
/* Put the relocated value back in the object file. */
|
|
switch (size)
|
|
{
|
|
default:
|
|
case 0:
|
|
abort ();
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
#ifdef BFD64
|
|
case 8:
|
|
#endif
|
|
put_data(x, location, 0, size);
|
|
break;
|
|
}
|
|
|
|
return overflow ? bfd_reloc_overflow : bfd_reloc_ok;
|
|
}
|
|
|
|
bfd_reloc_status_type
|
|
_bfd_ns32k_reloc_disp (abfd, reloc_entry, symbol, data, input_section,
|
|
output_bfd, error_message)
|
|
bfd *abfd;
|
|
arelent *reloc_entry;
|
|
struct symbol_cache_entry *symbol;
|
|
PTR data;
|
|
asection *input_section;
|
|
bfd *output_bfd;
|
|
char **error_message;
|
|
{
|
|
return do_ns32k_reloc (abfd, reloc_entry, symbol, data, input_section,
|
|
output_bfd, error_message,
|
|
_bfd_ns32k_get_displacement,
|
|
_bfd_ns32k_put_displacement);
|
|
}
|
|
|
|
bfd_reloc_status_type
|
|
_bfd_ns32k_reloc_imm (abfd, reloc_entry, symbol, data, input_section,
|
|
output_bfd, error_message)
|
|
bfd *abfd;
|
|
arelent *reloc_entry;
|
|
struct symbol_cache_entry *symbol;
|
|
PTR data;
|
|
asection *input_section;
|
|
bfd *output_bfd;
|
|
char **error_message;
|
|
{
|
|
return do_ns32k_reloc (abfd, reloc_entry, symbol, data, input_section,
|
|
output_bfd, error_message, _bfd_ns32k_get_immediate,
|
|
_bfd_ns32k_put_immediate);
|
|
}
|
|
|
|
bfd_reloc_status_type
|
|
_bfd_ns32k_final_link_relocate (howto, input_bfd, input_section, contents,
|
|
address, value, addend)
|
|
reloc_howto_type *howto;
|
|
bfd *input_bfd;
|
|
asection *input_section;
|
|
bfd_byte *contents;
|
|
bfd_vma address;
|
|
bfd_vma value;
|
|
bfd_vma addend;
|
|
{
|
|
bfd_vma relocation;
|
|
|
|
/* Sanity check the address. */
|
|
if (address > input_section->_cooked_size)
|
|
return bfd_reloc_outofrange;
|
|
|
|
/* This function assumes that we are dealing with a basic relocation
|
|
against a symbol. We want to compute the value of the symbol to
|
|
relocate to. This is just VALUE, the value of the symbol, plus
|
|
ADDEND, any addend associated with the reloc. */
|
|
relocation = value + addend;
|
|
|
|
/* If the relocation is PC relative, we want to set RELOCATION to
|
|
the distance between the symbol (currently in RELOCATION) and the
|
|
location we are relocating. Some targets (e.g., i386-aout)
|
|
arrange for the contents of the section to be the negative of the
|
|
offset of the location within the section; for such targets
|
|
pcrel_offset is false. Other targets (e.g., m88kbcs or ELF)
|
|
simply leave the contents of the section as zero; for such
|
|
targets pcrel_offset is true. If pcrel_offset is false we do not
|
|
need to subtract out the offset of the location within the
|
|
section (which is just ADDRESS). */
|
|
if (howto->pc_relative)
|
|
{
|
|
relocation -= (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
if (howto->pcrel_offset)
|
|
relocation -= address;
|
|
}
|
|
|
|
return _bfd_ns32k_relocate_contents (howto, input_bfd, relocation,
|
|
contents + address);
|
|
}
|