/* BFD support for the Intel 386 architecture.
- Copyright 1992, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2004, 2005,
- 2007, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1992-2016 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#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,
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 */
FALSE,
bfd_i386_compatible,
bfd_default_scan,
- 0
+ bfd_arch_i386_long_nop_fill,
+ &bfd_i386_nacl_arch
};
static const bfd_arch_info_type bfd_x86_64_arch_intel_syntax =
FALSE,
bfd_i386_compatible,
bfd_default_scan,
+ bfd_arch_i386_long_nop_fill,
&bfd_x64_32_arch_intel_syntax,
};
TRUE,
bfd_i386_compatible,
bfd_default_scan,
+ bfd_arch_i386_short_nop_fill,
&bfd_x86_64_arch_intel_syntax
};
FALSE,
bfd_i386_compatible,
bfd_default_scan,
+ bfd_arch_i386_short_nop_fill,
&bfd_i386_arch_intel_syntax
};
FALSE,
bfd_i386_compatible,
bfd_default_scan,
+ bfd_arch_i386_long_nop_fill,
&i8086_arch
};
FALSE,
bfd_i386_compatible,
bfd_default_scan,
+ bfd_arch_i386_long_nop_fill,
&bfd_x64_32_arch
};
TRUE,
bfd_i386_compatible,
bfd_default_scan,
+ bfd_arch_i386_short_nop_fill,
&bfd_x86_64_arch
};