428 lines
13 KiB
C
428 lines
13 KiB
C
/* BFD support for the ARM processor
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Copyright 1994, 1997, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
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Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "libiberty.h"
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static const bfd_arch_info_type * compatible
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PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
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static bfd_boolean scan
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PARAMS ((const struct bfd_arch_info *, const char *));
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static bfd_boolean arm_check_note
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PARAMS ((bfd *, char *, bfd_size_type, const char *, char **));
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/* This routine is provided two arch_infos and works out which ARM
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machine which would be compatible with both and returns a pointer
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to its info structure. */
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static const bfd_arch_info_type *
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compatible (a,b)
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const bfd_arch_info_type * a;
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const bfd_arch_info_type * b;
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{
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/* If a & b are for different architecture we can do nothing. */
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if (a->arch != b->arch)
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return NULL;
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/* If a & b are for the same machine then all is well. */
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if (a->mach == b->mach)
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return a;
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/* Otherwise if either a or b is the 'default' machine
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then it can be polymorphed into the other. */
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if (a->the_default)
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return b;
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if (b->the_default)
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return a;
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/* So far all newer ARM architecture cores are
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supersets of previous cores. */
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if (a->mach < b->mach)
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return b;
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else if (a->mach > b->mach)
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return a;
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/* Never reached! */
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return NULL;
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}
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static struct
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{
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unsigned int mach;
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char * name;
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}
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processors[] =
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{
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{ bfd_mach_arm_2, "arm2" },
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{ bfd_mach_arm_2a, "arm250" },
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{ bfd_mach_arm_2a, "arm3" },
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{ bfd_mach_arm_3, "arm6" },
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{ bfd_mach_arm_3, "arm60" },
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{ bfd_mach_arm_3, "arm600" },
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{ bfd_mach_arm_3, "arm610" },
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{ bfd_mach_arm_3, "arm7" },
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{ bfd_mach_arm_3, "arm710" },
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{ bfd_mach_arm_3, "arm7500" },
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{ bfd_mach_arm_3, "arm7d" },
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{ bfd_mach_arm_3, "arm7di" },
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{ bfd_mach_arm_3M, "arm7dm" },
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{ bfd_mach_arm_3M, "arm7dmi" },
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{ bfd_mach_arm_4T, "arm7tdmi" },
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{ bfd_mach_arm_4, "arm8" },
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{ bfd_mach_arm_4, "arm810" },
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{ bfd_mach_arm_4, "arm9" },
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{ bfd_mach_arm_4, "arm920" },
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{ bfd_mach_arm_4T, "arm920t" },
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{ bfd_mach_arm_4T, "arm9tdmi" },
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{ bfd_mach_arm_4, "sa1" },
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{ bfd_mach_arm_4, "strongarm"},
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{ bfd_mach_arm_4, "strongarm110" },
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{ bfd_mach_arm_4, "strongarm1100" },
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{ bfd_mach_arm_XScale, "xscale" },
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{ bfd_mach_arm_ep9312, "ep9312" },
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{ bfd_mach_arm_iWMMXt, "iwmmxt" }
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};
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static bfd_boolean
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scan (info, string)
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const struct bfd_arch_info * info;
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const char * string;
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{
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int i;
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/* First test for an exact match. */
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if (strcasecmp (string, info->printable_name) == 0)
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return TRUE;
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/* Next check for a processor name instead of an Architecture name. */
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for (i = sizeof (processors) / sizeof (processors[0]); i--;)
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{
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if (strcasecmp (string, processors [i].name) == 0)
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break;
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}
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if (i != -1 && info->mach == processors [i].mach)
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return TRUE;
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/* Finally check for the default architecture. */
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if (strcasecmp (string, "arm") == 0)
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return info->the_default;
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return FALSE;
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}
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#define N(number, print, default, next) \
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{ 32, 32, 8, bfd_arch_arm, number, "arm", print, 4, default, compatible, scan, next }
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static const bfd_arch_info_type arch_info_struct[] =
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{
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N (bfd_mach_arm_2, "armv2", FALSE, & arch_info_struct[1]),
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N (bfd_mach_arm_2a, "armv2a", FALSE, & arch_info_struct[2]),
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N (bfd_mach_arm_3, "armv3", FALSE, & arch_info_struct[3]),
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N (bfd_mach_arm_3M, "armv3m", FALSE, & arch_info_struct[4]),
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N (bfd_mach_arm_4, "armv4", FALSE, & arch_info_struct[5]),
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N (bfd_mach_arm_4T, "armv4t", FALSE, & arch_info_struct[6]),
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N (bfd_mach_arm_5, "armv5", FALSE, & arch_info_struct[7]),
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N (bfd_mach_arm_5T, "armv5t", FALSE, & arch_info_struct[8]),
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N (bfd_mach_arm_5TE, "armv5te", FALSE, & arch_info_struct[9]),
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N (bfd_mach_arm_XScale, "xscale", FALSE, & arch_info_struct[10]),
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N (bfd_mach_arm_ep9312, "ep9312", FALSE, & arch_info_struct[11]),
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N (bfd_mach_arm_iWMMXt,"iwmmxt", FALSE, NULL)
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};
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const bfd_arch_info_type bfd_arm_arch =
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N (0, "arm", TRUE, & arch_info_struct[0]);
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/* Support functions used by both the COFF and ELF versions of the ARM port. */
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/* Handle the mergeing of the 'machine' settings of input file IBFD
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and an output file OBFD. These values actually represent the
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different possible ARM architecture variants.
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Returns TRUE if they were merged successfully or FALSE otherwise. */
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bfd_boolean
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bfd_arm_merge_machines (ibfd, obfd)
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bfd * ibfd;
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bfd * obfd;
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{
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unsigned int in = bfd_get_mach (ibfd);
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unsigned int out = bfd_get_mach (obfd);
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/* If the output architecture is unknown, we now have a value to set. */
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if (out == bfd_mach_arm_unknown)
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bfd_set_arch_mach (obfd, bfd_arch_arm, in);
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/* If the input architecure is unknown,
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then so must be the output architecture. */
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else if (in == bfd_mach_arm_unknown)
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/* FIXME: We ought to have some way to
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override this on the command line. */
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bfd_set_arch_mach (obfd, bfd_arch_arm, bfd_mach_arm_unknown);
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/* If they are the same then nothing needs to be done. */
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else if (out == in)
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;
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/* Otherwise the general principle that a earlier architecture can be
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linked with a later architecure to produce a binary that will execute
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on the later architecture.
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We fail however if we attempt to link a Cirrus EP9312 binary with an
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Intel XScale binary, since these architecture have co-processors which
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will not both be present on the same physical hardware. */
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else if (in == bfd_mach_arm_ep9312
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&& (out == bfd_mach_arm_XScale || out == bfd_mach_arm_iWMMXt))
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{
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_bfd_error_handler (_("\
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ERROR: %s is compiled for the EP9312, whereas %s is compiled for XScale"),
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bfd_archive_filename (ibfd),
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bfd_get_filename (obfd));
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bfd_set_error (bfd_error_wrong_format);
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return FALSE;
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}
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else if (out == bfd_mach_arm_ep9312
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&& (in == bfd_mach_arm_XScale || in == bfd_mach_arm_iWMMXt))
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{
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_bfd_error_handler (_("\
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ERROR: %s is compiled for the EP9312, whereas %s is compiled for XScale"),
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bfd_archive_filename (obfd),
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bfd_get_filename (ibfd));
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bfd_set_error (bfd_error_wrong_format);
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return FALSE;
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}
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else if (in > out)
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bfd_set_arch_mach (obfd, bfd_arch_arm, in);
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/* else
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Nothing to do. */
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return TRUE;
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}
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typedef struct
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{
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unsigned char namesz[4]; /* Size of entry's owner string. */
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unsigned char descsz[4]; /* Size of the note descriptor. */
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unsigned char type[4]; /* Interpretation of the descriptor. */
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char name[1]; /* Start of the name+desc data. */
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} arm_Note;
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static bfd_boolean
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arm_check_note (abfd, buffer, buffer_size, expected_name, description_return)
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bfd * abfd;
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char * buffer;
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bfd_size_type buffer_size;
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const char * expected_name;
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char ** description_return;
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{
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unsigned long namesz;
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unsigned long descsz;
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unsigned long type;
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char * descr;
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if (buffer_size < offsetof (arm_Note, name))
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return FALSE;
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/* We have to extract the values this way to allow for a
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host whose endian-ness is different from the target. */
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namesz = bfd_get_32 (abfd, buffer);
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descsz = bfd_get_32 (abfd, buffer + offsetof (arm_Note, descsz));
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type = bfd_get_32 (abfd, buffer + offsetof (arm_Note, type));
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descr = buffer + offsetof (arm_Note, name);
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/* Check for buffer overflow. */
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if (namesz + descsz + offsetof (arm_Note, name) > buffer_size)
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return FALSE;
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if (expected_name == NULL)
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{
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if (namesz != 0)
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return FALSE;
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}
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else
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{
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if (namesz != (strlen (expected_name) + 1 + 3) & ~3)
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return FALSE;
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if (strcmp (descr, expected_name) != 0)
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return FALSE;
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descr += (namesz + 3) & ~3;
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}
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/* FIXME: We should probably check the type as well. */
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if (description_return != NULL)
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* description_return = descr;
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return TRUE;
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}
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#define NOTE_ARCH_STRING "arch: "
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bfd_boolean
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bfd_arm_update_notes (abfd, note_section)
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bfd * abfd;
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const char * note_section;
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{
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asection * arm_arch_section;
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bfd_size_type buffer_size;
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char * buffer;
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char * arch_string;
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char * expected;
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/* Look for a note section. If one is present check the architecture
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string encoded in it, and set it to the current architecture if it is
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different. */
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arm_arch_section = bfd_get_section_by_name (abfd, note_section);
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if (arm_arch_section == NULL)
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return TRUE;
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buffer_size = arm_arch_section->_raw_size;
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if (buffer_size == 0)
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return FALSE;
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buffer = bfd_malloc (buffer_size);
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if (buffer == NULL)
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return FALSE;
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if (! bfd_get_section_contents (abfd, arm_arch_section, buffer,
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(file_ptr) 0, buffer_size))
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goto FAIL;
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/* Parse the note. */
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if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
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goto FAIL;
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/* Check the architecture in the note against the architecture of the bfd. */
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switch (bfd_get_mach (abfd))
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{
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default:
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case bfd_mach_arm_unknown: expected = "unknown"; break;
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case bfd_mach_arm_2: expected = "armv2"; break;
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case bfd_mach_arm_2a: expected = "armv2a"; break;
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case bfd_mach_arm_3: expected = "armv3"; break;
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case bfd_mach_arm_3M: expected = "armv3M"; break;
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case bfd_mach_arm_4: expected = "armv4"; break;
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case bfd_mach_arm_4T: expected = "armv4t"; break;
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case bfd_mach_arm_5: expected = "armv5"; break;
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case bfd_mach_arm_5T: expected = "armv5t"; break;
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case bfd_mach_arm_5TE: expected = "armv5te"; break;
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case bfd_mach_arm_XScale: expected = "XScale"; break;
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case bfd_mach_arm_ep9312: expected = "ep9312"; break;
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case bfd_mach_arm_iWMMXt: expected = "iWMMXt"; break;
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}
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if (strcmp (arch_string, expected) != 0)
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{
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strcpy (buffer + offsetof (arm_Note, name) + ((strlen (NOTE_ARCH_STRING) + 3) & ~3), expected);
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if (! bfd_set_section_contents (abfd, arm_arch_section, buffer,
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(file_ptr) 0, buffer_size))
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{
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(*_bfd_error_handler)
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(_("warning: unable to update contents of %s section in %s"),
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note_section, bfd_get_filename (abfd));
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goto FAIL;
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}
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}
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free (buffer);
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return TRUE;
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FAIL:
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free (buffer);
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return FALSE;
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}
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static struct
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{
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const char * string;
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unsigned int mach;
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}
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architectures[] =
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{
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{ "armv2", bfd_mach_arm_2 },
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{ "armv2a", bfd_mach_arm_2a },
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{ "armv3", bfd_mach_arm_3 },
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{ "armv3M", bfd_mach_arm_3M },
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{ "armv4", bfd_mach_arm_4 },
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{ "armv4t", bfd_mach_arm_4T },
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{ "armv5", bfd_mach_arm_5 },
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{ "armv5t", bfd_mach_arm_5T },
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{ "armv5te", bfd_mach_arm_5TE },
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{ "XScale", bfd_mach_arm_XScale },
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{ "ep9312", bfd_mach_arm_ep9312 },
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{ "iWMMXt", bfd_mach_arm_iWMMXt }
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};
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/* Extract the machine number stored in a note section. */
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unsigned int
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bfd_arm_get_mach_from_notes (abfd, note_section)
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bfd * abfd;
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const char * note_section;
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{
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asection * arm_arch_section;
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bfd_size_type buffer_size;
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char * buffer;
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char * arch_string;
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int i;
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/* Look for a note section. If one is present check the architecture
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string encoded in it, and set it to the current architecture if it is
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different. */
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arm_arch_section = bfd_get_section_by_name (abfd, note_section);
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if (arm_arch_section == NULL)
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return bfd_mach_arm_unknown;
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buffer_size = arm_arch_section->_raw_size;
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if (buffer_size == 0)
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return bfd_mach_arm_unknown;
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buffer = bfd_malloc (buffer_size);
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if (buffer == NULL)
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return bfd_mach_arm_unknown;
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if (! bfd_get_section_contents (abfd, arm_arch_section, buffer,
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(file_ptr) 0, buffer_size))
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goto FAIL;
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/* Parse the note. */
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if (! arm_check_note (abfd, buffer, buffer_size, NOTE_ARCH_STRING, & arch_string))
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goto FAIL;
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/* Interpret the architecture string. */
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for (i = ARRAY_SIZE (architectures); i--;)
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if (strcmp (arch_string, architectures[i].string) == 0)
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{
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free (buffer);
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return architectures[i].mach;
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}
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FAIL:
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free (buffer);
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return bfd_mach_arm_unknown;
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}
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