cpu-arm.c revision 78828 
1/* BFD support for the ARM processor
2   Copyright 1994, 1997, 1999, 2000 Free Software Foundation, Inc.
3   Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
4
5This file is part of BFD, the Binary File Descriptor library.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
20
21#include "bfd.h"
22#include "sysdep.h"
23#include "libbfd.h"
24
25static const bfd_arch_info_type *compatible
26  PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
27static boolean scan PARAMS ((const struct bfd_arch_info *, const char *));
28
29/* This routine is provided two arch_infos and works out which ARM
30   machine which would be compatible with both and returns a pointer
31   to its info structure */
32
33static const bfd_arch_info_type *
34compatible (a,b)
35     const bfd_arch_info_type * a;
36     const bfd_arch_info_type * b;
37{
38  /* If a & b are for different architecture we can do nothing */
39  if (a->arch != b->arch)
40      return NULL;
41
42  /* If a & b are for the same machine then all is well */
43  if (a->mach == b->mach)
44    return a;
45
46  /* Otherwise if either a or b is the 'default' machine then
47     it can be polymorphed into the other */
48  if (a->the_default)
49    return b;
50
51  if (b->the_default)
52    return a;
53
54  /* So far all newer ARM architecture cores are supersets of previous cores */
55  if (a->mach < b->mach)
56    return b;
57  else if (a->mach > b->mach)
58    return a;
59
60  /* Never reached! */
61  return NULL;
62}
63
64static struct
65{
66  enum bfd_architecture arch;
67  char *                name;
68}
69processors[] =
70{
71  { bfd_mach_arm_2,  "arm2"     },
72  { bfd_mach_arm_2a, "arm250"   },
73  { bfd_mach_arm_2a, "arm3"     },
74  { bfd_mach_arm_3,  "arm6"     },
75  { bfd_mach_arm_3,  "arm60"    },
76  { bfd_mach_arm_3,  "arm600"   },
77  { bfd_mach_arm_3,  "arm610"   },
78  { bfd_mach_arm_3,  "arm7"     },
79  { bfd_mach_arm_3,  "arm710"   },
80  { bfd_mach_arm_3,  "arm7500"  },
81  { bfd_mach_arm_3,  "arm7d"    },
82  { bfd_mach_arm_3,  "arm7di"   },
83  { bfd_mach_arm_3M, "arm7dm"   },
84  { bfd_mach_arm_3M, "arm7dmi"  },
85  { bfd_mach_arm_4T, "arm7tdmi" },
86  { bfd_mach_arm_4,  "arm8"     },
87  { bfd_mach_arm_4,  "arm810"   },
88  { bfd_mach_arm_4,  "arm9"     },
89  { bfd_mach_arm_4,  "arm920"   },
90  { bfd_mach_arm_4T, "arm920t"  },
91  { bfd_mach_arm_4T, "arm9tdmi" },
92  { bfd_mach_arm_4,  "sa1"      },
93  { bfd_mach_arm_4,  "strongarm"},
94  { bfd_mach_arm_4,  "strongarm110" },
95  { bfd_mach_arm_4,  "strongarm1100" },
96  { bfd_mach_arm_XScale, "xscale" }
97};
98
99static boolean
100scan (info, string)
101     const struct bfd_arch_info * info;
102     const char * string;
103{
104  int  i;
105
106  /* First test for an exact match */
107  if (strcasecmp (string, info->printable_name) == 0)
108    return true;
109
110  /* Next check for a processor name instead of an Architecture name */
111  for (i = sizeof (processors) / sizeof (processors[0]); i--;)
112    {
113      if (strcasecmp (string, processors[ i ].name) == 0)
114	break;
115    }
116
117  if (i != -1 && info->arch == processors[ i ].arch)
118    return true;
119
120  /* Finally check for the default architecture */
121  if (strcasecmp (string, "arm") == 0)
122    return info->the_default;
123
124  return false;
125}
126
127#define N(number, print, default, next)  \
128{  32, 32, 8, bfd_arch_arm, number, "arm", print, 4, default, compatible, scan, next }
129
130static const bfd_arch_info_type arch_info_struct[] =
131{
132  N( bfd_mach_arm_2,  "armv2",  false, & arch_info_struct[1] ),
133  N( bfd_mach_arm_2a, "armv2a", false, & arch_info_struct[2] ),
134  N( bfd_mach_arm_3,  "armv3",  false, & arch_info_struct[3] ),
135  N( bfd_mach_arm_3M, "armv3m", false, & arch_info_struct[4] ),
136  N( bfd_mach_arm_4,  "armv4",  false, & arch_info_struct[5] ),
137  N( bfd_mach_arm_4T, "armv4t", false, & arch_info_struct[6] ),
138  N( bfd_mach_arm_5,  "armv5",  false, & arch_info_struct[7] ),
139  N( bfd_mach_arm_5T, "armv5t", false, & arch_info_struct[8] ),
140  N( bfd_mach_arm_5TE, "armv5te", false, & arch_info_struct[9] ),
141  N( bfd_mach_arm_XScale, "xscale", false, NULL )
142};
143
144const bfd_arch_info_type bfd_arm_arch =
145  N( 0, "arm", true, & arch_info_struct[0] );
146