bfd/cpu-i960.c

   1 /* BFD library support routines for the i960 architecture.
   2    Copyright 1990, 1991, 1993, 1994, 1996, 1999, 2000, 2001, 2002, 2005, 2006,
   3    2007 Free Software Foundation, Inc.
   4    Hacked by Steve Chamberlain of Cygnus Support.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26
  27 static bfd_boolean scan_960_mach
  28   PARAMS ((const bfd_arch_info_type *, const char *));
  29 static const bfd_arch_info_type *compatible
  30   PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
  31
  32 /* This routine is provided a string, and tries to work out if it
  33    could possibly refer to the i960 machine pointed at in the
  34    info_struct pointer */
  35
  36 static bfd_boolean
  37 scan_960_mach (ap, string)
  38      const bfd_arch_info_type *ap;
  39      const char *string;
  40 {
  41   unsigned long machine;
  42   int fail_because_not_80960 = FALSE;
  43
  44   /* Look for the string i960 at the front of the string.  */
  45   if (strncasecmp ("i960", string, 4) == 0)
  46     {
  47       string += 4;
  48
  49       /* i960 on it's own means core to us.  */
  50       if (* string == 0)
  51         return ap->mach == bfd_mach_i960_core;
  52
  53       /* "i960:*" is valid, anything else is not.  */
  54       if (* string != ':')
  55         return FALSE;
  56
  57       string ++;
  58     }
  59   /* In some bfds the cpu-id is written as "80960KA", "80960KB",
  60      "80960CA" or "80960MC".  */
  61   else if (CONST_STRNEQ (string, "80960"))
  62     {
  63       string += 5;
  64
  65       /* Set this to TRUE here.  If a correct matching postfix
  66          is detected below it will be reset to FALSE.  */
  67       fail_because_not_80960 = TRUE;
  68     }
  69   /* No match, can't be us.  */
  70   else
  71     return FALSE;
  72
  73   if (* string == '\0')
  74     return FALSE;
  75
  76   if (string[0] == 'c' && string[1] == 'o' && string[2] == 'r' &&
  77       string[3] == 'e' && string[4] == '\0')
  78     machine = bfd_mach_i960_core;
  79   else if (strcasecmp (string, "ka_sa") == 0)
  80     machine = bfd_mach_i960_ka_sa;
  81   else if (strcasecmp (string, "kb_sb") == 0)
  82     machine = bfd_mach_i960_kb_sb;
  83   else if (string[1] == '\0' || string[2] != '\0') /* rest are 2-char.  */
  84     return FALSE;
  85   else if (string[0] == 'k' && string[1] == 'b')
  86     { machine = bfd_mach_i960_kb_sb; fail_because_not_80960 = FALSE; }
  87   else if (string[0] == 's' && string[1] == 'b')
  88     machine = bfd_mach_i960_kb_sb;
  89   else if (string[0] == 'm' && string[1] == 'c')
  90     { machine = bfd_mach_i960_mc; fail_because_not_80960 = FALSE; }
  91   else if (string[0] == 'x' && string[1] == 'a')
  92     machine = bfd_mach_i960_xa;
  93   else if (string[0] == 'c' && string[1] == 'a')
  94     { machine = bfd_mach_i960_ca; fail_because_not_80960 = FALSE; }
  95   else if (string[0] == 'k' && string[1] == 'a')
  96     { machine = bfd_mach_i960_ka_sa; fail_because_not_80960 = FALSE; }
  97   else if (string[0] == 's' && string[1] == 'a')
  98     machine = bfd_mach_i960_ka_sa;
  99   else if (string[0] == 'j' && string[1] == 'x')
 100     machine = bfd_mach_i960_jx;
 101   else if (string[0] == 'h' && string[1] == 'x')
 102     machine = bfd_mach_i960_hx;
 103   else
 104     return FALSE;
 105
 106   if (fail_because_not_80960)
 107     return FALSE;
 108
 109   if (machine == ap->mach)
 110     return TRUE;
 111
 112   return FALSE;
 113 }
 114
 115 /* This routine is provided two arch_infos and works out the i960
 116    machine which would be compatible with both and returns a pointer
 117    to its info structure */
 118
 119 static const bfd_arch_info_type *
 120 compatible (a,b)
 121      const bfd_arch_info_type *a;
 122      const bfd_arch_info_type *b;
 123 {
 124
 125   /* The i960 has distinct subspecies which may not interbreed:
 126         CORE CA
 127         CORE KA KB MC XA
 128         CORE HX JX
 129      Any architecture on the same line is compatible, the one on
 130      the right is the least restrictive.
 131
 132      We represent this information in an array, each machine to a side */
 133
 134 #define ERROR   0
 135 #define CORE    bfd_mach_i960_core  /*1*/
 136 #define KA      bfd_mach_i960_ka_sa /*2*/
 137 #define KB      bfd_mach_i960_kb_sb /*3*/
 138 #define MC      bfd_mach_i960_mc    /*4*/
 139 #define XA      bfd_mach_i960_xa    /*5*/
 140 #define CA      bfd_mach_i960_ca    /*6*/
 141 #define JX      bfd_mach_i960_jx    /*7*/
 142 #define HX      bfd_mach_i960_hx    /*8*/
 143 #define MAX_ARCH ((int)HX)
 144
 145   static const unsigned long matrix[MAX_ARCH+1][MAX_ARCH+1] =
 146     {
 147       { ERROR,  CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 148       { CORE,   CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 149       { KA,     KA,     KA,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 150       { KB,     KB,     KB,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 151       { MC,     MC,     MC,     MC,     MC,     XA,     ERROR,  ERROR,  ERROR},
 152       { XA,     XA,     XA,     XA,     XA,     XA,     ERROR,  ERROR,  ERROR},
 153       { CA,     CA,     ERROR,  ERROR,  ERROR,  ERROR,  CA,     ERROR,  ERROR},
 154       { JX,     JX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  JX,     HX },
 155       { HX,     HX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  HX,     HX },
 156     };
 157
 158   if (a->arch != b->arch || matrix[a->mach][b->mach] == ERROR)
 159     {
 160     return NULL;
 161     }
 162   else
 163     {
 164     return (a->mach  ==  matrix[a->mach][b->mach]) ?  a : b;
 165     }
 166 }
 167
 168 #define N(a,b,d,n) \
 169 { 32, 32, 8,bfd_arch_i960,a,"i960",b,3,d,compatible,scan_960_mach,n,}
 170
 171 static const bfd_arch_info_type arch_info_struct[] =
 172 {
 173   N(bfd_mach_i960_ka_sa,"i960:ka_sa",FALSE, &arch_info_struct[1]),
 174   N(bfd_mach_i960_kb_sb,"i960:kb_sb",FALSE, &arch_info_struct[2]),
 175   N(bfd_mach_i960_mc,   "i960:mc",   FALSE, &arch_info_struct[3]),
 176   N(bfd_mach_i960_xa,   "i960:xa",   FALSE, &arch_info_struct[4]),
 177   N(bfd_mach_i960_ca,   "i960:ca",   FALSE, &arch_info_struct[5]),
 178   N(bfd_mach_i960_jx,   "i960:jx",   FALSE, &arch_info_struct[6]),
 179   N(bfd_mach_i960_hx,   "i960:hx",   FALSE, 0),
 180 };
 181
 182 const bfd_arch_info_type bfd_i960_arch =
 183   N(bfd_mach_i960_core, "i960:core", TRUE, &arch_info_struct[0]);