bfd/cpu-i960.c

   1 /* BFD library support routines for the i960 architecture.
   2    Copyright (C) 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
   3    Hacked by Steve Chamberlain of Cygnus Support.
   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
  25 /* This routine is provided a string, and tries to work out if it
  26    could possibly refer to the i960 machine pointed at in the
  27    info_struct pointer */
  28
  29 static boolean
  30 scan_960_mach (ap, string)
  31      const bfd_arch_info_type *ap;
  32      const char *string;
  33 {
  34   unsigned long machine;
  35   int i;
  36   int fail_because_not_80960 = false;
  37
  38   for (i = 0; i < strlen (string); i ++)
  39     string[i] = tolower (string[i]);
  40
  41   /* Look for the string i960 at the front of the string.  */
  42   if (strncmp ("i960", string, 4) == 0)
  43     {
  44       string += 4;
  45
  46       /* i960 on it's own means core to us.  */
  47       if (* string == 0)
  48         return ap->mach == bfd_mach_i960_core;
  49
  50       /* "i960:*" is valid, anything else is not.  */
  51       if (* string != ':')
  52         return false;
  53
  54       string ++;
  55     }
  56   /* In some bfds the cpu-id is written as "80960KA", "80960KB",
  57      "80960CA" or "80960MC".  */
  58   else if (strncmp ("80960", string, 5) == 0)
  59     {
  60       string += 5;
  61
  62       /* Sett his to true here.  If a correct matching postfix
  63          is detected below it will be reset to false.  */
  64       fail_because_not_80960 = true;
  65     }
  66   /* No match, can't be us.  */
  67   else
  68     return false;
  69
  70   if (* string == '\0')
  71     return false;
  72
  73   if (string[0] == 'c' && string[1] == 'o' && string[2] == 'r' &&
  74       string[3] == 'e' && string[4] == '\0')
  75     machine = bfd_mach_i960_core;
  76   else if (strcmp (string, "ka_sa") == 0)
  77     machine = bfd_mach_i960_ka_sa;
  78   else if (strcmp (string, "kb_sb") == 0)
  79     machine = bfd_mach_i960_kb_sb;
  80   else if (string[1] == '\0' || string[2] != '\0') /* rest are 2-char.  */
  81     return false;
  82   else if (string[0] == 'k' && string[1] == 'b')
  83     { machine = bfd_mach_i960_kb_sb; fail_because_not_80960 = false; }
  84   else if (string[0] == 's' && string[1] == 'b')
  85     machine = bfd_mach_i960_kb_sb;
  86   else if (string[0] == 'm' && string[1] == 'c')
  87     { machine = bfd_mach_i960_mc; fail_because_not_80960 = false; }
  88   else if (string[0] == 'x' && string[1] == 'a')
  89     machine = bfd_mach_i960_xa;
  90   else if (string[0] == 'c' && string[1] == 'a')
  91     { machine = bfd_mach_i960_ca; fail_because_not_80960 = false; }
  92   else if (string[0] == 'k' && string[1] == 'a')
  93     { machine = bfd_mach_i960_ka_sa; fail_because_not_80960 = false; }
  94   else if (string[0] == 's' && string[1] == 'a')
  95     machine = bfd_mach_i960_ka_sa;
  96   else if (string[0] == 'j' && string[1] == 'x')
  97     machine = bfd_mach_i960_jx;
  98   else if (string[0] == 'h' && string[1] == 'x')
  99     machine = bfd_mach_i960_hx;
 100   else
 101     return false;
 102
 103   if (fail_because_not_80960)
 104     return false;
 105
 106   if (machine == ap->mach)
 107     return true;
 108
 109   return false;
 110 }
 111
 112 /* This routine is provided two arch_infos and works out the i960
 113    machine which would be compatible with both and returns a pointer
 114    to its info structure */
 115
 116 static const bfd_arch_info_type *
 117 compatible (a,b)
 118      const bfd_arch_info_type *a;
 119      const bfd_arch_info_type *b;
 120 {
 121
 122   /* The i960 has distinct subspecies which may not interbreed:
 123         CORE CA
 124         CORE KA KB MC XA
 125         CORE HX JX
 126      Any architecture on the same line is compatible, the one on
 127      the right is the least restrictive.
 128
 129      We represent this information in an array, each machine to a side */
 130
 131 #define ERROR   0
 132 #define CORE    bfd_mach_i960_core  /*1*/
 133 #define KA      bfd_mach_i960_ka_sa /*2*/
 134 #define KB      bfd_mach_i960_kb_sb /*3*/
 135 #define MC      bfd_mach_i960_mc    /*4*/
 136 #define XA      bfd_mach_i960_xa    /*5*/
 137 #define CA      bfd_mach_i960_ca    /*6*/
 138 #define JX      bfd_mach_i960_jx    /*7*/
 139 #define HX      bfd_mach_i960_hx    /*8*/
 140 #define MAX_ARCH ((int)HX)
 141
 142   static CONST unsigned long matrix[MAX_ARCH+1][MAX_ARCH+1] =
 143     {
 144       { ERROR,  CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 145       { CORE,   CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 146       { KA,     KA,     KA,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 147       { KB,     KB,     KB,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 148       { MC,     MC,     MC,     MC,     MC,     XA,     ERROR,  ERROR,  ERROR},
 149       { XA,     XA,     XA,     XA,     XA,     XA,     ERROR,  ERROR,  ERROR},
 150       { CA,     CA,     ERROR,  ERROR,  ERROR,  ERROR,  CA,     ERROR,  ERROR},
 151       { JX,     JX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  JX,     HX },
 152       { HX,     HX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  HX,     HX },
 153     };
 154
 155   if (a->arch != b->arch || matrix[a->mach][b->mach] == ERROR)
 156     {
 157     return NULL;
 158     }
 159   else
 160     {
 161     return (a->mach  ==  matrix[a->mach][b->mach]) ?  a : b;
 162     }
 163 }
 164
 165 int bfd_default_scan_num_mach();
 166 #define N(a,b,d,n) \
 167 { 32, 32, 8,bfd_arch_i960,a,"i960",b,3,d,compatible,scan_960_mach,n,}
 168
 169 static const bfd_arch_info_type arch_info_struct[] =
 170 {
 171   N(bfd_mach_i960_ka_sa,"i960:ka_sa",false, &arch_info_struct[1]),
 172   N(bfd_mach_i960_kb_sb,"i960:kb_sb",false, &arch_info_struct[2]),
 173   N(bfd_mach_i960_mc,   "i960:mc",   false, &arch_info_struct[3]),
 174   N(bfd_mach_i960_xa,   "i960:xa",   false, &arch_info_struct[4]),
 175   N(bfd_mach_i960_ca,   "i960:ca",   false, &arch_info_struct[5]),
 176   N(bfd_mach_i960_jx,   "i960:jx",   false, &arch_info_struct[6]),
 177   N(bfd_mach_i960_hx,   "i960:hx",   false, 0),
 178 };
 179
 180 const bfd_arch_info_type bfd_i960_arch =
 181   N(bfd_mach_i960_core, "i960:core", true, &arch_info_struct[0]);