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, 2012 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 /* 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 bfd_boolean
  32 scan_960_mach (const bfd_arch_info_type *ap,
  33                const char *string)
  34 {
  35   unsigned long machine;
  36   int fail_because_not_80960 = FALSE;
  37
  38   /* Look for the string i960 at the front of the string.  */
  39   if (strncasecmp ("i960", string, 4) == 0)
  40     {
  41       string += 4;
  42
  43       /* i960 on it's own means core to us.  */
  44       if (* string == 0)
  45         return ap->mach == bfd_mach_i960_core;
  46
  47       /* "i960:*" is valid, anything else is not.  */
  48       if (* string != ':')
  49         return FALSE;
  50
  51       string ++;
  52     }
  53   /* In some bfds the cpu-id is written as "80960KA", "80960KB",
  54      "80960CA" or "80960MC".  */
  55   else if (CONST_STRNEQ (string, "80960"))
  56     {
  57       string += 5;
  58
  59       /* Set this to TRUE here.  If a correct matching postfix
  60          is detected below it will be reset to FALSE.  */
  61       fail_because_not_80960 = TRUE;
  62     }
  63   /* No match, can't be us.  */
  64   else
  65     return FALSE;
  66
  67   if (* string == '\0')
  68     return FALSE;
  69
  70   if (string[0] == 'c' && string[1] == 'o' && string[2] == 'r' &&
  71       string[3] == 'e' && string[4] == '\0')
  72     machine = bfd_mach_i960_core;
  73   else if (strcasecmp (string, "ka_sa") == 0)
  74     machine = bfd_mach_i960_ka_sa;
  75   else if (strcasecmp (string, "kb_sb") == 0)
  76     machine = bfd_mach_i960_kb_sb;
  77   else if (string[1] == '\0' || string[2] != '\0') /* rest are 2-char.  */
  78     return FALSE;
  79   else if (string[0] == 'k' && string[1] == 'b')
  80     { machine = bfd_mach_i960_kb_sb; fail_because_not_80960 = FALSE; }
  81   else if (string[0] == 's' && string[1] == 'b')
  82     machine = bfd_mach_i960_kb_sb;
  83   else if (string[0] == 'm' && string[1] == 'c')
  84     { machine = bfd_mach_i960_mc; fail_because_not_80960 = FALSE; }
  85   else if (string[0] == 'x' && string[1] == 'a')
  86     machine = bfd_mach_i960_xa;
  87   else if (string[0] == 'c' && string[1] == 'a')
  88     { machine = bfd_mach_i960_ca; fail_because_not_80960 = FALSE; }
  89   else if (string[0] == 'k' && string[1] == 'a')
  90     { machine = bfd_mach_i960_ka_sa; fail_because_not_80960 = FALSE; }
  91   else if (string[0] == 's' && string[1] == 'a')
  92     machine = bfd_mach_i960_ka_sa;
  93   else if (string[0] == 'j' && string[1] == 'x')
  94     machine = bfd_mach_i960_jx;
  95   else if (string[0] == 'h' && string[1] == 'x')
  96     machine = bfd_mach_i960_hx;
  97   else
  98     return FALSE;
  99
 100   if (fail_because_not_80960)
 101     return FALSE;
 102
 103   if (machine == ap->mach)
 104     return TRUE;
 105
 106   return FALSE;
 107 }
 108
 109 /* This routine is provided two arch_infos and works out the i960
 110    machine which would be compatible with both and returns a pointer
 111    to its info structure */
 112
 113 static const bfd_arch_info_type *
 114 compatible (const bfd_arch_info_type *a,
 115             const bfd_arch_info_type *b)
 116 {
 117
 118   /* The i960 has distinct subspecies which may not interbreed:
 119         CORE CA
 120         CORE KA KB MC XA
 121         CORE HX JX
 122      Any architecture on the same line is compatible, the one on
 123      the right is the least restrictive.
 124
 125      We represent this information in an array, each machine to a side */
 126
 127 #define ERROR   0
 128 #define CORE    bfd_mach_i960_core  /*1*/
 129 #define KA      bfd_mach_i960_ka_sa /*2*/
 130 #define KB      bfd_mach_i960_kb_sb /*3*/
 131 #define MC      bfd_mach_i960_mc    /*4*/
 132 #define XA      bfd_mach_i960_xa    /*5*/
 133 #define CA      bfd_mach_i960_ca    /*6*/
 134 #define JX      bfd_mach_i960_jx    /*7*/
 135 #define HX      bfd_mach_i960_hx    /*8*/
 136 #define MAX_ARCH ((int)HX)
 137
 138   static const unsigned long matrix[MAX_ARCH+1][MAX_ARCH+1] =
 139     {
 140       { ERROR,  CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 141       { CORE,   CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 142       { KA,     KA,     KA,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 143       { KB,     KB,     KB,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 144       { MC,     MC,     MC,     MC,     MC,     XA,     ERROR,  ERROR,  ERROR},
 145       { XA,     XA,     XA,     XA,     XA,     XA,     ERROR,  ERROR,  ERROR},
 146       { CA,     CA,     ERROR,  ERROR,  ERROR,  ERROR,  CA,     ERROR,  ERROR},
 147       { JX,     JX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  JX,     HX },
 148       { HX,     HX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  HX,     HX },
 149     };
 150
 151   if (a->arch != b->arch || matrix[a->mach][b->mach] == ERROR)
 152     return NULL;
 153
 154   return (a->mach  ==  matrix[a->mach][b->mach]) ?  a : b;
 155 }
 156
 157 #define N(a,b,d,n) \
 158 { 32, 32, 8,bfd_arch_i960,a,"i960",b,3,d,compatible,scan_960_mach, \
 159   bfd_arch_default_fill, n,}
 160
 161 static const bfd_arch_info_type arch_info_struct[] =
 162 {
 163   N(bfd_mach_i960_ka_sa,"i960:ka_sa",FALSE, &arch_info_struct[1]),
 164   N(bfd_mach_i960_kb_sb,"i960:kb_sb",FALSE, &arch_info_struct[2]),
 165   N(bfd_mach_i960_mc,   "i960:mc",   FALSE, &arch_info_struct[3]),
 166   N(bfd_mach_i960_xa,   "i960:xa",   FALSE, &arch_info_struct[4]),
 167   N(bfd_mach_i960_ca,   "i960:ca",   FALSE, &arch_info_struct[5]),
 168   N(bfd_mach_i960_jx,   "i960:jx",   FALSE, &arch_info_struct[6]),
 169   N(bfd_mach_i960_hx,   "i960:hx",   FALSE, 0),
 170 };
 171
 172 const bfd_arch_info_type bfd_i960_arch =
 173   N(bfd_mach_i960_core, "i960:core", TRUE, &arch_info_struct[0]);