305 lines
7.3 KiB
C
305 lines
7.3 KiB
C
/* BFD support for the Intel 386 architecture.
|
|
Copyright 1992, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2004, 2005,
|
|
2007, 2009, 2010, 2011, 2013
|
|
Free Software Foundation, Inc.
|
|
|
|
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include "sysdep.h"
|
|
#include "bfd.h"
|
|
#include "libbfd.h"
|
|
#include "libiberty.h"
|
|
|
|
extern void * bfd_arch_i386_short_nop_fill (bfd_size_type, bfd_boolean,
|
|
bfd_boolean);
|
|
|
|
static const bfd_arch_info_type *
|
|
bfd_i386_compatible (const bfd_arch_info_type *a,
|
|
const bfd_arch_info_type *b)
|
|
{
|
|
const bfd_arch_info_type *compat = bfd_default_compatible (a, b);
|
|
|
|
/* Don't allow mixing x64_32 with x86_64. */
|
|
if (compat
|
|
&& (a->mach & bfd_mach_x64_32) != (b->mach & bfd_mach_x64_32))
|
|
compat = NULL;
|
|
|
|
return compat;
|
|
}
|
|
|
|
/* Fill the buffer with zero or nop instruction if CODE is TRUE. Use
|
|
multi byte nop instructions if LONG_NOP is TRUE. */
|
|
|
|
static void *
|
|
bfd_arch_i386_fill (bfd_size_type count, bfd_boolean code,
|
|
bfd_boolean long_nop)
|
|
{
|
|
/* nop */
|
|
static const char nop_1[] = { 0x90 };
|
|
/* xchg %ax,%ax */
|
|
static const char nop_2[] = { 0x66, 0x90 };
|
|
/* nopl (%[re]ax) */
|
|
static const char nop_3[] = { 0x0f, 0x1f, 0x00 };
|
|
/* nopl 0(%[re]ax) */
|
|
static const char nop_4[] = { 0x0f, 0x1f, 0x40, 0x00 };
|
|
/* nopl 0(%[re]ax,%[re]ax,1) */
|
|
static const char nop_5[] = { 0x0f, 0x1f, 0x44, 0x00, 0x00 };
|
|
/* nopw 0(%[re]ax,%[re]ax,1) */
|
|
static const char nop_6[] = { 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 };
|
|
/* nopl 0L(%[re]ax) */
|
|
static const char nop_7[] = { 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 };
|
|
/* nopl 0L(%[re]ax,%[re]ax,1) */
|
|
static const char nop_8[] =
|
|
{ 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00};
|
|
/* nopw 0L(%[re]ax,%[re]ax,1) */
|
|
static const char nop_9[] =
|
|
{ 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 };
|
|
/* nopw %cs:0L(%[re]ax,%[re]ax,1) */
|
|
static const char nop_10[] =
|
|
{ 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 };
|
|
static const char *const nops[] =
|
|
{ nop_1, nop_2, nop_3, nop_4, nop_5,
|
|
nop_6, nop_7, nop_8, nop_9, nop_10 };
|
|
bfd_size_type nop_size = long_nop ? ARRAY_SIZE (nops) : 2;
|
|
|
|
void *fill = bfd_malloc (count);
|
|
if (fill == NULL)
|
|
return fill;
|
|
|
|
if (code)
|
|
{
|
|
bfd_byte *p = fill;
|
|
while (count >= nop_size)
|
|
{
|
|
memcpy (p, nops[nop_size - 1], nop_size);
|
|
p += nop_size;
|
|
count -= nop_size;
|
|
}
|
|
if (count != 0)
|
|
memcpy (p, nops[count - 1], count);
|
|
}
|
|
else
|
|
memset (fill, 0, count);
|
|
|
|
return fill;
|
|
}
|
|
|
|
/* Fill the buffer with zero or short nop instruction if CODE is TRUE. */
|
|
|
|
void *
|
|
bfd_arch_i386_short_nop_fill (bfd_size_type count,
|
|
bfd_boolean is_bigendian ATTRIBUTE_UNUSED,
|
|
bfd_boolean code)
|
|
{
|
|
return bfd_arch_i386_fill (count, code, FALSE);
|
|
}
|
|
|
|
/* Fill the buffer with zero or long nop instruction if CODE is TRUE. */
|
|
|
|
static void *
|
|
bfd_arch_i386_long_nop_fill (bfd_size_type count,
|
|
bfd_boolean is_bigendian ATTRIBUTE_UNUSED,
|
|
bfd_boolean code)
|
|
{
|
|
return bfd_arch_i386_fill (count, code, TRUE);
|
|
}
|
|
|
|
/* Fill the buffer with zero, or one-byte nop instructions if CODE is TRUE. */
|
|
|
|
static void *
|
|
bfd_arch_i386_onebyte_nop_fill (bfd_size_type count,
|
|
bfd_boolean is_bigendian ATTRIBUTE_UNUSED,
|
|
bfd_boolean code)
|
|
{
|
|
void *fill = bfd_malloc (count);
|
|
if (fill != NULL)
|
|
memset (fill, code ? 0x90 : 0, count);
|
|
return fill;
|
|
}
|
|
|
|
|
|
static const bfd_arch_info_type bfd_x64_32_nacl_arch =
|
|
{
|
|
64, /* 64 bits in a word */
|
|
64, /* 64 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_x64_32_nacl,
|
|
"i386",
|
|
"i386:x64-32:nacl",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_onebyte_nop_fill,
|
|
NULL
|
|
};
|
|
|
|
static const bfd_arch_info_type bfd_x86_64_nacl_arch =
|
|
{
|
|
64, /* 64 bits in a word */
|
|
64, /* 64 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_x86_64_nacl,
|
|
"i386",
|
|
"i386:x86-64:nacl",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_onebyte_nop_fill,
|
|
&bfd_x64_32_nacl_arch
|
|
};
|
|
|
|
const bfd_arch_info_type bfd_i386_nacl_arch =
|
|
{
|
|
32, /* 32 bits in a word */
|
|
32, /* 32 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_i386_i386_nacl,
|
|
"i386",
|
|
"i386:nacl",
|
|
3,
|
|
TRUE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_onebyte_nop_fill,
|
|
&bfd_x86_64_nacl_arch
|
|
};
|
|
|
|
static const bfd_arch_info_type bfd_x64_32_arch_intel_syntax =
|
|
{
|
|
64, /* 64 bits in a word */
|
|
64, /* 64 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_x64_32_intel_syntax,
|
|
"i386:intel",
|
|
"i386:x64-32:intel",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_long_nop_fill,
|
|
&bfd_i386_nacl_arch
|
|
};
|
|
|
|
static const bfd_arch_info_type bfd_x86_64_arch_intel_syntax =
|
|
{
|
|
64, /* 64 bits in a word */
|
|
64, /* 64 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_x86_64_intel_syntax,
|
|
"i386:intel",
|
|
"i386:x86-64:intel",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_long_nop_fill,
|
|
&bfd_x64_32_arch_intel_syntax,
|
|
};
|
|
|
|
static const bfd_arch_info_type bfd_i386_arch_intel_syntax =
|
|
{
|
|
32, /* 32 bits in a word */
|
|
32, /* 32 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_i386_i386_intel_syntax,
|
|
"i386:intel",
|
|
"i386:intel",
|
|
3,
|
|
TRUE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_short_nop_fill,
|
|
&bfd_x86_64_arch_intel_syntax
|
|
};
|
|
|
|
static const bfd_arch_info_type i8086_arch =
|
|
{
|
|
32, /* 32 bits in a word */
|
|
32, /* 32 bits in an address (well, not really) */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_i386_i8086,
|
|
"i8086",
|
|
"i8086",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_short_nop_fill,
|
|
&bfd_i386_arch_intel_syntax
|
|
};
|
|
|
|
static const bfd_arch_info_type bfd_x64_32_arch =
|
|
{
|
|
64, /* 64 bits in a word */
|
|
64, /* 64 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_x64_32,
|
|
"i386",
|
|
"i386:x64-32",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_long_nop_fill,
|
|
&i8086_arch
|
|
};
|
|
|
|
static const bfd_arch_info_type bfd_x86_64_arch =
|
|
{
|
|
64, /* 64 bits in a word */
|
|
64, /* 64 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_x86_64,
|
|
"i386",
|
|
"i386:x86-64",
|
|
3,
|
|
FALSE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_long_nop_fill,
|
|
&bfd_x64_32_arch
|
|
};
|
|
|
|
const bfd_arch_info_type bfd_i386_arch =
|
|
{
|
|
32, /* 32 bits in a word */
|
|
32, /* 32 bits in an address */
|
|
8, /* 8 bits in a byte */
|
|
bfd_arch_i386,
|
|
bfd_mach_i386_i386,
|
|
"i386",
|
|
"i386",
|
|
3,
|
|
TRUE,
|
|
bfd_i386_compatible,
|
|
bfd_default_scan,
|
|
bfd_arch_i386_short_nop_fill,
|
|
&bfd_x86_64_arch
|
|
};
|