/* BFD support for the ARM processor
- Copyright 1994, 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+ Copyright 1994, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2009
+ Free Software Foundation, Inc.
Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
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
+ 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,
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. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
-
-static const bfd_arch_info_type * compatible
- PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
-static bfd_boolean scan
- PARAMS ((const struct bfd_arch_info *, const char *));
+#include "libiberty.h"
/* This routine is provided two arch_infos and works out which ARM
machine which would be compatible with both and returns a pointer
to its info structure. */
static const bfd_arch_info_type *
-compatible (a,b)
- const bfd_arch_info_type * a;
- const bfd_arch_info_type * b;
+compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b)
{
/* If a & b are for different architecture we can do nothing. */
if (a->arch != b->arch)
{ bfd_mach_arm_4, "strongarm"},
{ bfd_mach_arm_4, "strongarm110" },
{ bfd_mach_arm_4, "strongarm1100" },
- { bfd_mach_arm_XScale, "xscale" }
+ { bfd_mach_arm_XScale, "xscale" },
+ { bfd_mach_arm_ep9312, "ep9312" },
+ { bfd_mach_arm_iWMMXt, "iwmmxt" },
+ { bfd_mach_arm_iWMMXt2, "iwmmxt2" }
};
static bfd_boolean
-scan (info, string)
- const struct bfd_arch_info * info;
- const char * string;
+scan (const struct bfd_arch_info *info, const char *string)
{
int i;
N (bfd_mach_arm_5, "armv5", FALSE, & arch_info_struct[7]),
N (bfd_mach_arm_5T, "armv5t", FALSE, & arch_info_struct[8]),
N (bfd_mach_arm_5TE, "armv5te", FALSE, & arch_info_struct[9]),
- N (bfd_mach_arm_XScale, "xscale", FALSE, NULL)
+ N (bfd_mach_arm_XScale, "xscale", FALSE, & arch_info_struct[10]),
+ N (bfd_mach_arm_ep9312, "ep9312", FALSE, & arch_info_struct[11]),
+ N (bfd_mach_arm_iWMMXt, "iwmmxt", FALSE, & arch_info_struct[12]),
+ N (bfd_mach_arm_iWMMXt2, "iwmmxt2", FALSE, NULL)
};
const bfd_arch_info_type bfd_arm_arch =
N (0, "arm", TRUE, & arch_info_struct[0]);
+
+/* Support functions used by both the COFF and ELF versions of the ARM port. */
+
+/* Handle the merging of the 'machine' settings of input file IBFD
+ and an output file OBFD. These values actually represent the
+ different possible ARM architecture variants.
+ Returns TRUE if they were merged successfully or FALSE otherwise. */
+
+bfd_boolean
+bfd_arm_merge_machines (bfd *ibfd, bfd *obfd)
+{
+ unsigned int in = bfd_get_mach (ibfd);
+ unsigned int out = bfd_get_mach (obfd);
+
+ /* If the output architecture is unknown, we now have a value to set. */
+ if (out == bfd_mach_arm_unknown)
+ bfd_set_arch_mach (obfd, bfd_arch_arm, in);
+
+ /* If the input architecture is unknown,
+ then so must be the output architecture. */
+ else if (in == bfd_mach_arm_unknown)
+ /* FIXME: We ought to have some way to
+ override this on the command line. */
+ bfd_set_arch_mach (obfd, bfd_arch_arm, bfd_mach_arm_unknown);
+
+ /* If they are the same then nothing needs to be done. */
+ else if (out == in)
+ ;
+
+ /* Otherwise the general principle that a earlier architecture can be
+ linked with a later architecture to produce a binary that will execute
+ on the later architecture.
+
+ We fail however if we attempt to link a Cirrus EP9312 binary with an
+ Intel XScale binary, since these architecture have co-processors which
+ will not both be present on the same physical hardware. */
+ else if (in == bfd_mach_arm_ep9312
+ && (out == bfd_mach_arm_XScale
+ || out == bfd_mach_arm_iWMMXt
+ || out == bfd_mach_arm_iWMMXt2))
+ {
+ _bfd_error_handler (_("\
+error: %B is compiled for the EP9312, whereas %B is compiled for XScale"),
+ ibfd, obfd);
+ bfd_set_error (bfd_error_wrong_format);
+ return FALSE;
+ }
+ else if (out == bfd_mach_arm_ep9312
+ && (in == bfd_mach_arm_XScale
+ || in == bfd_mach_arm_iWMMXt
+ || in == bfd_mach_arm_iWMMXt2))
+ {
+ _bfd_error_handler (_("\
+error: %B is compiled for the EP9312, whereas %B is compiled for XScale"),
+ obfd, ibfd);
+ bfd_set_error (bfd_error_wrong_format);
+ return FALSE;
+ }
+ else if (in > out)
+ bfd_set_arch_mach (obfd, bfd_arch_arm, in);
+ /* else
+ Nothing to do. */
+
+ return TRUE;
+}
+
+typedef struct
+{
+ unsigned char namesz[4]; /* Size of entry's owner string. */
+ unsigned char descsz[4]; /* Size of the note descriptor. */
+ unsigned char type[4]; /* Interpretation of the descriptor. */
+ char name[1]; /* Start of the name+desc data. */
+} arm_Note;
+
+static bfd_boolean
+arm_check_note (bfd *abfd,
+ bfd_byte *buffer,
+ bfd_size_type buffer_size,
+ const char *expected_name,
+ char **description_return)
+{
+ unsigned long namesz;
+ unsigned long descsz;
+ unsigned long type;
+ char * descr;
+
+ if (buffer_size < offsetof (arm_Note, name))
+ return FALSE;
+
+ /* We have to extract the values this way to allow for a
+ host whose endian-ness is different from the target. */
+ namesz = bfd_get_32 (abfd, buffer);
+ descsz = bfd_get_32 (abfd, buffer + offsetof (arm_Note, descsz));
+ type = bfd_get_32 (abfd, buffer + offsetof (arm_Note, type));
+ descr = (char *) buffer + offsetof (arm_Note, name);
+
+ /* Check for buffer overflow. */
+ if (namesz + descsz + offsetof (arm_Note, name) > buffer_size)
+ return FALSE;
+
+ if (expected_name == NULL)
+ {
+ if (namesz != 0)
+ return FALSE;
+ }
+ else
+ {
+ if (namesz != ((strlen (expected_name) + 1 + 3) & ~3))
+ return FALSE;
+
+ if (strcmp (descr, expected_name) != 0)
+ return FALSE;
+
+ descr += (namesz + 3) & ~3;
+ }
+
+ /* FIXME: We should probably check the type as well. */
+
+ if (description_return != NULL)
+ * description_return = descr;
+
+ return TRUE;
+}
+
+#define NOTE_ARCH_STRING "arch: "
+
+bfd_boolean
+bfd_arm_update_notes (bfd *abfd, const char *note_section)
+{
+ asection * arm_arch_section;
+ bfd_size_type buffer_size;
+ bfd_byte * buffer;
+ char * arch_string;
+ char * expected;
+
+ /* Look for a note section. If one is present check the architecture
+ string encoded in it, and set it to the current architecture if it is
+ different. */
+ arm_arch_section = bfd_get_section_by_name (abfd, note_section);
+
+ if (arm_arch_section == NULL)
+ return TRUE;
+
+ buffer_size = arm_arch_section->size;
+ if (buffer_size == 0)
+ return FALSE;
+
+ if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer))
+ goto FAIL;
+
+ /* Parse the note. */
+ if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
+ goto FAIL;
+
+ /* Check the architecture in the note against the architecture of the bfd. */
+ switch (bfd_get_mach (abfd))
+ {
+ default:
+ case bfd_mach_arm_unknown: expected = "unknown"; break;
+ case bfd_mach_arm_2: expected = "armv2"; break;
+ case bfd_mach_arm_2a: expected = "armv2a"; break;
+ case bfd_mach_arm_3: expected = "armv3"; break;
+ case bfd_mach_arm_3M: expected = "armv3M"; break;
+ case bfd_mach_arm_4: expected = "armv4"; break;
+ case bfd_mach_arm_4T: expected = "armv4t"; break;
+ case bfd_mach_arm_5: expected = "armv5"; break;
+ case bfd_mach_arm_5T: expected = "armv5t"; break;
+ case bfd_mach_arm_5TE: expected = "armv5te"; break;
+ case bfd_mach_arm_XScale: expected = "XScale"; break;
+ case bfd_mach_arm_ep9312: expected = "ep9312"; break;
+ case bfd_mach_arm_iWMMXt: expected = "iWMMXt"; break;
+ case bfd_mach_arm_iWMMXt2: expected = "iWMMXt2"; break;
+ }
+
+ if (strcmp (arch_string, expected) != 0)
+ {
+ strcpy ((char *) buffer + (offsetof (arm_Note, name)
+ + ((strlen (NOTE_ARCH_STRING) + 3) & ~3)),
+ expected);
+
+ if (! bfd_set_section_contents (abfd, arm_arch_section, buffer,
+ (file_ptr) 0, buffer_size))
+ {
+ (*_bfd_error_handler)
+ (_("warning: unable to update contents of %s section in %s"),
+ note_section, bfd_get_filename (abfd));
+ goto FAIL;
+ }
+ }
+
+ free (buffer);
+ return TRUE;
+
+ FAIL:
+ if (buffer != NULL)
+ free (buffer);
+ return FALSE;
+}
+
+
+static struct
+{
+ const char * string;
+ unsigned int mach;
+}
+architectures[] =
+{
+ { "armv2", bfd_mach_arm_2 },
+ { "armv2a", bfd_mach_arm_2a },
+ { "armv3", bfd_mach_arm_3 },
+ { "armv3M", bfd_mach_arm_3M },
+ { "armv4", bfd_mach_arm_4 },
+ { "armv4t", bfd_mach_arm_4T },
+ { "armv5", bfd_mach_arm_5 },
+ { "armv5t", bfd_mach_arm_5T },
+ { "armv5te", bfd_mach_arm_5TE },
+ { "XScale", bfd_mach_arm_XScale },
+ { "ep9312", bfd_mach_arm_ep9312 },
+ { "iWMMXt", bfd_mach_arm_iWMMXt },
+ { "iWMMXt2", bfd_mach_arm_iWMMXt2 }
+};
+
+/* Extract the machine number stored in a note section. */
+unsigned int
+bfd_arm_get_mach_from_notes (bfd *abfd, const char *note_section)
+{
+ asection * arm_arch_section;
+ bfd_size_type buffer_size;
+ bfd_byte * buffer;
+ char * arch_string;
+ int i;
+
+ /* Look for a note section. If one is present check the architecture
+ string encoded in it, and set it to the current architecture if it is
+ different. */
+ arm_arch_section = bfd_get_section_by_name (abfd, note_section);
+
+ if (arm_arch_section == NULL)
+ return bfd_mach_arm_unknown;
+
+ buffer_size = arm_arch_section->size;
+ if (buffer_size == 0)
+ return bfd_mach_arm_unknown;
+
+ if (!bfd_malloc_and_get_section (abfd, arm_arch_section, &buffer))
+ goto FAIL;
+
+ /* Parse the note. */
+ if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
+ goto FAIL;
+
+ /* Interpret the architecture string. */
+ for (i = ARRAY_SIZE (architectures); i--;)
+ if (strcmp (arch_string, architectures[i].string) == 0)
+ {
+ free (buffer);
+ return architectures[i].mach;
+ }
+
+ FAIL:
+ if (buffer != NULL)
+ free (buffer);
+ return bfd_mach_arm_unknown;
+}
+
+bfd_boolean
+bfd_is_arm_special_symbol_name (const char * name, int type)
+{
+ /* The ARM compiler outputs several obsolete forms. Recognize them
+ in addition to the standard $a, $t and $d. We are somewhat loose
+ in what we accept here, since the full set is not documented. */
+ if (!name || name[0] != '$')
+ return FALSE;
+ if (name[1] == 'a' || name[1] == 't' || name[1] == 'd')
+ type &= BFD_ARM_SPECIAL_SYM_TYPE_MAP;
+ else if (name[1] == 'm' || name[1] == 'f' || name[1] == 'p')
+ type &= BFD_ARM_SPECIAL_SYM_TYPE_TAG;
+ else if (name[1] >= 'a' && name[1] <= 'z')
+ type &= BFD_ARM_SPECIAL_SYM_TYPE_OTHER;
+ else
+ return FALSE;
+
+ return (type != 0 && (name[2] == 0 || name[2] == '.'));
+}
+
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