bfd/cpu-i960.c

   1 /* BFD library support routines for the i960 architecture.
   2    Copyright (C) 1990-2018 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25
  26 /* This routine is provided a string, and tries to work out if it
  27    could possibly refer to the i960 machine pointed at in the
  28    info_struct pointer */
  29
  30 static bfd_boolean
  31 scan_960_mach (const bfd_arch_info_type *ap,
  32                const char *string)
  33 {
  34   unsigned long machine;
  35   int fail_because_not_80960 = FALSE;
  36
  37   /* Look for the string i960 at the front of the string.  */
  38   if (strncasecmp ("i960", string, 4) == 0)
  39     {
  40       string += 4;
  41
  42       /* i960 on it's own means core to us.  */
  43       if (* string == 0)
  44         return ap->mach == bfd_mach_i960_core;
  45
  46       /* "i960:*" is valid, anything else is not.  */
  47       if (* string != ':')
  48         return FALSE;
  49
  50       string ++;
  51     }
  52   /* In some bfds the cpu-id is written as "80960KA", "80960KB",
  53      "80960CA" or "80960MC".  */
  54   else if (CONST_STRNEQ (string, "80960"))
  55     {
  56       string += 5;
  57
  58       /* Set this to TRUE here.  If a correct matching postfix
  59          is detected below it will be reset to FALSE.  */
  60       fail_because_not_80960 = TRUE;
  61     }
  62   /* No match, can't be us.  */
  63   else
  64     return FALSE;
  65
  66   if (* string == '\0')
  67     return FALSE;
  68
  69   if (string[0] == 'c' && string[1] == 'o' && string[2] == 'r' &&
  70       string[3] == 'e' && string[4] == '\0')
  71     machine = bfd_mach_i960_core;
  72   else if (strcasecmp (string, "ka_sa") == 0)
  73     machine = bfd_mach_i960_ka_sa;
  74   else if (strcasecmp (string, "kb_sb") == 0)
  75     machine = bfd_mach_i960_kb_sb;
  76   else if (string[1] == '\0' || string[2] != '\0') /* rest are 2-char.  */
  77     return FALSE;
  78   else if (string[0] == 'k' && string[1] == 'b')
  79     { machine = bfd_mach_i960_kb_sb; fail_because_not_80960 = FALSE; }
  80   else if (string[0] == 's' && string[1] == 'b')
  81     machine = bfd_mach_i960_kb_sb;
  82   else if (string[0] == 'm' && string[1] == 'c')
  83     { machine = bfd_mach_i960_mc; fail_because_not_80960 = FALSE; }
  84   else if (string[0] == 'x' && string[1] == 'a')
  85     machine = bfd_mach_i960_xa;
  86   else if (string[0] == 'c' && string[1] == 'a')
  87     { machine = bfd_mach_i960_ca; fail_because_not_80960 = FALSE; }
  88   else if (string[0] == 'k' && string[1] == 'a')
  89     { machine = bfd_mach_i960_ka_sa; fail_because_not_80960 = FALSE; }
  90   else if (string[0] == 's' && string[1] == 'a')
  91     machine = bfd_mach_i960_ka_sa;
  92   else if (string[0] == 'j' && string[1] == 'x')
  93     machine = bfd_mach_i960_jx;
  94   else if (string[0] == 'h' && string[1] == 'x')
  95     machine = bfd_mach_i960_hx;
  96   else
  97     return FALSE;
  98
  99   if (fail_because_not_80960)
 100     return FALSE;
 101
 102   if (machine == ap->mach)
 103     return TRUE;
 104
 105   return FALSE;
 106 }
 107
 108 /* This routine is provided two arch_infos and works out the i960
 109    machine which would be compatible with both and returns a pointer
 110    to its info structure */
 111
 112 static const bfd_arch_info_type *
 113 compatible (const bfd_arch_info_type *a,
 114             const bfd_arch_info_type *b)
 115 {
 116
 117   /* The i960 has distinct subspecies which may not interbreed:
 118         CORE CA
 119         CORE KA KB MC XA
 120         CORE HX JX
 121      Any architecture on the same line is compatible, the one on
 122      the right is the least restrictive.
 123
 124      We represent this information in an array, each machine to a side */
 125
 126 #define ERROR   0
 127 #define CORE    bfd_mach_i960_core  /*1*/
 128 #define KA      bfd_mach_i960_ka_sa /*2*/
 129 #define KB      bfd_mach_i960_kb_sb /*3*/
 130 #define MC      bfd_mach_i960_mc    /*4*/
 131 #define XA      bfd_mach_i960_xa    /*5*/
 132 #define CA      bfd_mach_i960_ca    /*6*/
 133 #define JX      bfd_mach_i960_jx    /*7*/
 134 #define HX      bfd_mach_i960_hx    /*8*/
 135 #define MAX_ARCH ((int)HX)
 136
 137   static const unsigned long matrix[MAX_ARCH+1][MAX_ARCH+1] =
 138     {
 139       { ERROR,  CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 140       { CORE,   CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },
 141       { KA,     KA,     KA,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 142       { KB,     KB,     KB,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},
 143       { MC,     MC,     MC,     MC,     MC,     XA,     ERROR,  ERROR,  ERROR},
 144       { XA,     XA,     XA,     XA,     XA,     XA,     ERROR,  ERROR,  ERROR},
 145       { CA,     CA,     ERROR,  ERROR,  ERROR,  ERROR,  CA,     ERROR,  ERROR},
 146       { JX,     JX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  JX,     HX },
 147       { HX,     HX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  HX,     HX },
 148     };
 149
 150   if (a->arch != b->arch || matrix[a->mach][b->mach] == ERROR)
 151     return NULL;
 152
 153   return (a->mach  ==  matrix[a->mach][b->mach]) ?  a : b;
 154 }
 155
 156 #define N(a,b,d,n) \
 157 { 32, 32, 8,bfd_arch_i960,a,"i960",b,3,d,compatible,scan_960_mach, \
 158   bfd_arch_default_fill, n,}
 159
 160 static const bfd_arch_info_type arch_info_struct[] =
 161 {
 162   N(bfd_mach_i960_ka_sa,"i960:ka_sa",FALSE, &arch_info_struct[1]),
 163   N(bfd_mach_i960_kb_sb,"i960:kb_sb",FALSE, &arch_info_struct[2]),
 164   N(bfd_mach_i960_mc,   "i960:mc",   FALSE, &arch_info_struct[3]),
 165   N(bfd_mach_i960_xa,   "i960:xa",   FALSE, &arch_info_struct[4]),
 166   N(bfd_mach_i960_ca,   "i960:ca",   FALSE, &arch_info_struct[5]),
 167   N(bfd_mach_i960_jx,   "i960:jx",   FALSE, &arch_info_struct[6]),
 168   N(bfd_mach_i960_hx,   "i960:hx",   FALSE, 0),
 169 };
 170
 171 const bfd_arch_info_type bfd_i960_arch =
 172   N(bfd_mach_i960_core, "i960:core", TRUE, &arch_info_struct[0]);