bfd/cpu-i960.c

   1 /* BFD library support routines for the i960 architecture.
   2    Copyright (C) 1990-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 #include <sysdep.h>
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25
  26
  27 /* This routine is provided a string, and tries to work out if it
  28    could possibly refer to the i960 machine pointed at in the
  29    info_struct pointer */
  30
  31 static boolean
  32 DEFUN(scan_960_mach, (ap, string),
  33       CONST bfd_arch_info_struct_type *ap AND
  34       CONST char *string)
  35 {
  36   unsigned long machine;
  37
  38   /* Look for the string i960, or somesuch at the front of the string  */
  39
  40   if (strncmp("i960",string) == 0) {
  41     string+=4;
  42   }
  43   else {
  44     /* no match, can be us */
  45     return false;
  46   }
  47   if (string[0] == 0) {
  48     /* i960 on it's own means core to us*/
  49     if (ap->mach == bfd_mach_i960_core) return true;
  50     return false;
  51   }
  52
  53   if (string[0] != ':') {
  54     return false;
  55   }
  56   string++;
  57   if (string[0] == '\0')
  58     return false;
  59   if (string[0] == 'c' && string[1] == 'o' && string[2] == 'r' &&
  60       string[3] == 'e' && string[4] == '\0')
  61     machine = bfd_mach_i960_core;
  62   else if (string[1] == '\0' || string[2] != '\0') /* rest are 2-char */
  63     return false;
  64   else if (string[0] == 'k' && string[1] == 'b')
  65     machine = bfd_mach_i960_kb_sb;
  66   else if (string[0] == 's' && string[1] == 'b')
  67     machine = bfd_mach_i960_kb_sb;
  68   else if (string[0] == 'm' && string[1] == 'c')
  69     machine = bfd_mach_i960_mc;
  70   else if (string[0] == 'x' && string[1] == 'a')
  71     machine = bfd_mach_i960_xa;
  72   else if (string[0] == 'c' && string[1] == 'a')
  73     machine = bfd_mach_i960_ca;
  74   else if (string[0] == 'k' && string[1] == 'a')
  75     machine = bfd_mach_i960_ka_sa;
  76   else if (string[0] == 's' && string[1] == 'a')
  77     machine = bfd_mach_i960_ka_sa;
  78   else
  79     return false;
  80   if (machine == ap->mach)   return true;
  81   return false;
  82 }
  83
  84
  85
  86 /* This routine is provided two arch_infos and works out the i960
  87    machine which would be compatible with both and returns a pointer
  88    to its info structure */
  89
  90 CONST bfd_arch_info_struct_type *
  91 DEFUN(compatible,(a,b),
  92       CONST bfd_arch_info_struct_type *a AND
  93       CONST bfd_arch_info_struct_type *b)
  94 {
  95
  96   /* The i960 has two distinct subspecies which may not interbreed:
  97      CORE CA
  98      CORE KA KB MC XA
  99      Any architecture on the same line is compatible, the one on
 100      the right is the least restrictive.
 101
 102      We represent this information in an array, each machine to a side */
 103
 104 #define ERROR   0
 105 #define CORE    bfd_mach_i960_core  /*1*/
 106 #define KA      bfd_mach_i960_ka_sa /*2*/
 107 #define KB      bfd_mach_i960_kb_sb /*3*/
 108 #define MC      bfd_mach_i960_mc    /*4*/
 109 #define XA      bfd_mach_i960_xa    /*5*/
 110 #define CA      bfd_mach_i960_ca    /*6*/
 111
 112
 113   static CONST char matrix[7][7] =
 114       {
 115         ERROR,CORE,     KA,     KB,     MC,     XA,     CA,
 116         CORE,   CORE,   KA,     KB,     MC,     XA,     CA,
 117         KA,     KA,     KA,     KB,     MC,     XA,     ERROR,
 118         KB,     KB,     KB,     KB,     MC,     XA,     ERROR,
 119         MC,     MC,     MC,     MC,     MC,     XA,     ERROR,
 120         XA,     XA,     XA,     XA,     XA,     XA,     ERROR,
 121         CA,     CA,     ERROR,  ERROR,  ERROR,  ERROR,  CA
 122         };
 123
 124
 125   if (a->arch != b->arch || matrix[a->mach][b->mach] == ERROR)
 126     {
 127     return (bfd_arch_info_struct_type *)NULL;
 128     }
 129   else
 130     {
 131     return (a->mach  ==  matrix[a->mach][b->mach]) ?  a : b;
 132     }
 133 }
 134
 135
 136
 137 int bfd_default_scan_num_mach();
 138 #define N(a,b,d) \
 139 { 32, 32, 8,bfd_arch_i960,a,"i960",b,d,compatible,scan_960_mach,0,}
 140
 141 static bfd_arch_info_struct_type arch_info_struct[] =
 142 {
 143   N(bfd_mach_i960_core,"i960:core",true),
 144   N(bfd_mach_i960_ka_sa,"i960:ka_sa",false),
 145   N(bfd_mach_i960_kb_sb,"i960:kb_sb",false),
 146   N(bfd_mach_i960_mc,"i960:mc",false),
 147   N(bfd_mach_i960_xa,"i960:xa",false),
 148   N(bfd_mach_i960_ca,"i960:ca",false)
 149   };
 150
 151
 152 void DEFUN_VOID(bfd_i960_arch)
 153 {
 154   unsigned int i;
 155   for (i = 0; i < 6; i++)  {
 156     bfd_arch_linkin(arch_info_struct + i);
 157   }
 158 }