1 /* BFD support for the Intel 386 architecture.
2 Copyright 1992, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2004, 2005,
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
26 #include "libiberty.h"
28 extern void * bfd_arch_i386_fill (bfd_size_type, bfd_boolean, bfd_boolean);
30 static const bfd_arch_info_type *
31 bfd_i386_compatible (const bfd_arch_info_type *a,
32 const bfd_arch_info_type *b)
34 const bfd_arch_info_type *compat = bfd_default_compatible (a, b);
36 /* Don't allow mixing x64_32 with x86_64. */
38 && (a->mach & bfd_mach_x64_32) != (b->mach & bfd_mach_x64_32))
44 /* Fill the buffer with zero or nop instruction if CODE is TRUE. */
47 bfd_arch_i386_fill (bfd_size_type count,
48 bfd_boolean is_bigendian ATTRIBUTE_UNUSED,
52 static const char nop_1[] = { 0x90 };
54 static const char nop_2[] = { 0x66, 0x90 };
56 static const char nop_3[] = { 0x0f, 0x1f, 0x00 };
58 static const char nop_4[] = { 0x0f, 0x1f, 0x40, 0x00 };
59 /* nopl 0(%[re]ax,%[re]ax,1) */
60 static const char nop_5[] = { 0x0f, 0x1f, 0x44, 0x00, 0x00 };
61 /* nopw 0(%[re]ax,%[re]ax,1) */
62 static const char nop_6[] = { 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 };
63 /* nopl 0L(%[re]ax) */
64 static const char nop_7[] = { 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 };
65 /* nopl 0L(%[re]ax,%[re]ax,1) */
66 static const char nop_8[] =
67 { 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00};
68 /* nopw 0L(%[re]ax,%[re]ax,1) */
69 static const char nop_9[] =
70 { 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 };
71 /* nopw %cs:0L(%[re]ax,%[re]ax,1) */
72 static const char nop_10[] =
73 { 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 };
74 static const char *const nops[] =
75 { nop_1, nop_2, nop_3, nop_4, nop_5,
76 nop_6, nop_7, nop_8, nop_9, nop_10 };
78 void *fill = bfd_malloc (count);
85 while (count >= ARRAY_SIZE (nops))
87 memcpy (p, nops[ARRAY_SIZE (nops) - 1], ARRAY_SIZE (nops));
88 p += ARRAY_SIZE (nops);
89 count -= ARRAY_SIZE (nops);
92 memcpy (p, nops[count - 1], count);
95 memset (fill, 0, count);
100 static const bfd_arch_info_type bfd_x64_32_arch_intel_syntax =
102 64, /* 64 bits in a word */
103 64, /* 64 bits in an address */
104 8, /* 8 bits in a byte */
106 bfd_mach_x64_32_intel_syntax,
117 static const bfd_arch_info_type bfd_x86_64_arch_intel_syntax =
119 64, /* 64 bits in a word */
120 64, /* 64 bits in an address */
121 8, /* 8 bits in a byte */
123 bfd_mach_x86_64_intel_syntax,
131 &bfd_x64_32_arch_intel_syntax,
134 static const bfd_arch_info_type bfd_i386_arch_intel_syntax =
136 32, /* 32 bits in a word */
137 32, /* 32 bits in an address */
138 8, /* 8 bits in a byte */
140 bfd_mach_i386_i386_intel_syntax,
148 &bfd_x86_64_arch_intel_syntax
151 static const bfd_arch_info_type i8086_arch =
153 32, /* 32 bits in a word */
154 32, /* 32 bits in an address (well, not really) */
155 8, /* 8 bits in a byte */
165 &bfd_i386_arch_intel_syntax
168 static const bfd_arch_info_type bfd_x64_32_arch =
170 64, /* 64 bits in a word */
171 64, /* 64 bits in an address */
172 8, /* 8 bits in a byte */
185 static const bfd_arch_info_type bfd_x86_64_arch =
187 64, /* 64 bits in a word */
188 64, /* 64 bits in an address */
189 8, /* 8 bits in a byte */
202 const bfd_arch_info_type bfd_i386_arch =
204 32, /* 32 bits in a word */
205 32, /* 32 bits in an address */
206 8, /* 8 bits in a byte */