cpu-arm.c revision 104834 
1/* BFD support for the ARM processor
2   Copyright 1994, 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
3   Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
4
5   This file is part of BFD, the Binary File Descriptor library.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 2 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; if not, write to the Free Software
19   Foundation, 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
28  PARAMS ((const struct bfd_arch_info *, const char *));
29
30/* This routine is provided two arch_infos and works out which ARM
31   machine which would be compatible with both and returns a pointer
32   to its info structure.  */
33
34static const bfd_arch_info_type *
35compatible (a,b)
36     const bfd_arch_info_type * a;
37     const bfd_arch_info_type * b;
38{
39  /* If a & b are for different architecture we can do nothing.  */
40  if (a->arch != b->arch)
41      return NULL;
42
43  /* If a & b are for the same machine then all is well.  */
44  if (a->mach == b->mach)
45    return a;
46
47  /* Otherwise if either a or b is the 'default' machine
48     then it can be polymorphed into the other.  */
49  if (a->the_default)
50    return b;
51
52  if (b->the_default)
53    return a;
54
55  /* So far all newer ARM architecture cores are
56     supersets of previous cores.  */
57  if (a->mach < b->mach)
58    return b;
59  else if (a->mach > b->mach)
60    return a;
61
62  /* Never reached!  */
63  return NULL;
64}
65
66static struct
67{
68  unsigned int mach;
69  char *       name;
70}
71processors[] =
72{
73  { bfd_mach_arm_2,  "arm2"     },
74  { bfd_mach_arm_2a, "arm250"   },
75  { bfd_mach_arm_2a, "arm3"     },
76  { bfd_mach_arm_3,  "arm6"     },
77  { bfd_mach_arm_3,  "arm60"    },
78  { bfd_mach_arm_3,  "arm600"   },
79  { bfd_mach_arm_3,  "arm610"   },
80  { bfd_mach_arm_3,  "arm7"     },
81  { bfd_mach_arm_3,  "arm710"   },
82  { bfd_mach_arm_3,  "arm7500"  },
83  { bfd_mach_arm_3,  "arm7d"    },
84  { bfd_mach_arm_3,  "arm7di"   },
85  { bfd_mach_arm_3M, "arm7dm"   },
86  { bfd_mach_arm_3M, "arm7dmi"  },
87  { bfd_mach_arm_4T, "arm7tdmi" },
88  { bfd_mach_arm_4,  "arm8"     },
89  { bfd_mach_arm_4,  "arm810"   },
90  { bfd_mach_arm_4,  "arm9"     },
91  { bfd_mach_arm_4,  "arm920"   },
92  { bfd_mach_arm_4T, "arm920t"  },
93  { bfd_mach_arm_4T, "arm9tdmi" },
94  { bfd_mach_arm_4,  "sa1"      },
95  { bfd_mach_arm_4,  "strongarm"},
96  { bfd_mach_arm_4,  "strongarm110" },
97  { bfd_mach_arm_4,  "strongarm1100" },
98  { bfd_mach_arm_XScale, "xscale" }
99};
100
101static boolean
102scan (info, string)
103     const struct bfd_arch_info * info;
104     const char * string;
105{
106  int  i;
107
108  /* First test for an exact match.  */
109  if (strcasecmp (string, info->printable_name) == 0)
110    return true;
111
112  /* Next check for a processor name instead of an Architecture name.  */
113  for (i = sizeof (processors) / sizeof (processors[0]); i--;)
114    {
115      if (strcasecmp (string, processors [i].name) == 0)
116	break;
117    }
118
119  if (i != -1 && info->mach == processors [i].mach)
120    return true;
121
122  /* Finally check for the default architecture.  */
123  if (strcasecmp (string, "arm") == 0)
124    return info->the_default;
125
126  return false;
127}
128
129#define N(number, print, default, next)  \
130{  32, 32, 8, bfd_arch_arm, number, "arm", print, 4, default, compatible, scan, next }
131
132static const bfd_arch_info_type arch_info_struct[] =
133{
134  N (bfd_mach_arm_2,      "armv2",   false, & arch_info_struct[1]),
135  N (bfd_mach_arm_2a,     "armv2a",  false, & arch_info_struct[2]),
136  N (bfd_mach_arm_3,      "armv3",   false, & arch_info_struct[3]),
137  N (bfd_mach_arm_3M,     "armv3m",  false, & arch_info_struct[4]),
138  N (bfd_mach_arm_4,      "armv4",   false, & arch_info_struct[5]),
139  N (bfd_mach_arm_4T,     "armv4t",  false, & arch_info_struct[6]),
140  N (bfd_mach_arm_5,      "armv5",   false, & arch_info_struct[7]),
141  N (bfd_mach_arm_5T,     "armv5t",  false, & arch_info_struct[8]),
142  N (bfd_mach_arm_5TE,    "armv5te", false, & arch_info_struct[9]),
143  N (bfd_mach_arm_XScale, "xscale",  false, NULL)
144};
145
146const bfd_arch_info_type bfd_arm_arch =
147  N (0, "arm", true, & arch_info_struct[0]);
148