gdb/gdbserver/tdesc.c

   1 /* Copyright (C) 2012-2017 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include "server.h"
  19 #include "tdesc.h"
  20 #include "regdef.h"
  21
  22 void
  23 init_target_desc (struct target_desc *tdesc)
  24 {
  25   int offset, i;
  26   struct reg *reg;
  27
  28   offset = 0;
  29   for (i = 0; VEC_iterate (tdesc_reg_p, tdesc->reg_defs, i, reg); i++)
  30     {
  31       reg->offset = offset;
  32       offset += reg->size;
  33     }
  34
  35   tdesc->registers_size = offset / 8;
  36
  37   /* Make sure PBUFSIZ is large enough to hold a full register
  38      packet.  */
  39   gdb_assert (2 * tdesc->registers_size + 32 <= PBUFSIZ);
  40 }
  41
  42 #ifndef IN_PROCESS_AGENT
  43
  44 static const struct target_desc default_description {};
  45
  46 void
  47 copy_target_description (struct target_desc *dest,
  48                          const struct target_desc *src)
  49 {
  50   dest->reg_defs = src->reg_defs;
  51   dest->expedite_regs = src->expedite_regs;
  52   dest->registers_size = src->registers_size;
  53   dest->xmltarget = src->xmltarget;
  54 }
  55
  56 const struct target_desc *
  57 current_target_desc (void)
  58 {
  59   if (current_thread == NULL)
  60     return &default_description;
  61
  62   return current_process ()->tdesc;
  63 }
  64 #endif
  65
  66 struct tdesc_type
  67 {};
  68
  69 /* See arch/tdesc.h.  */
  70
  71 struct tdesc_feature *
  72 tdesc_create_feature (struct target_desc *tdesc, const char *name)
  73 {
  74   return tdesc;
  75 }
  76
  77 /* See arch/tdesc.h.  */
  78
  79 struct tdesc_type *
  80 tdesc_create_flags (struct tdesc_feature *feature, const char *name,
  81                     int size)
  82 {
  83   return NULL;
  84 }
  85
  86 /* See arch/tdesc.h.  */
  87
  88 void
  89 tdesc_add_flag (struct tdesc_type *type, int start,
  90                 const char *flag_name)
  91 {}
  92
  93 /* See arch/tdesc.h.  */
  94
  95 struct tdesc_type *
  96 tdesc_named_type (const struct tdesc_feature *feature, const char *id)
  97 {
  98   return NULL;
  99 }
 100
 101 /* See arch/tdesc.h.  */
 102
 103 struct tdesc_type *
 104 tdesc_create_union (struct tdesc_feature *feature, const char *id)
 105 {
 106   return NULL;
 107 }
 108
 109 /* See arch/tdesc.h.  */
 110
 111 struct tdesc_type *
 112 tdesc_create_struct (struct tdesc_feature *feature, const char *id)
 113 {
 114   return NULL;
 115 }
 116
 117 /* See arch/tdesc.h.  */
 118
 119 void
 120 tdesc_create_reg (struct tdesc_feature *feature, const char *name,
 121                   int regnum, int save_restore, const char *group,
 122                   int bitsize, const char *type)
 123 {
 124   struct target_desc *tdesc = (struct target_desc *) feature;
 125
 126   while (VEC_length (tdesc_reg_p, tdesc->reg_defs) < regnum)
 127     {
 128       struct reg *reg = XCNEW (struct reg);
 129
 130       reg->name = "";
 131       reg->size = 0;
 132       VEC_safe_push (tdesc_reg_p, tdesc->reg_defs, reg);
 133     }
 134
 135   gdb_assert (regnum == 0
 136               || regnum == VEC_length (tdesc_reg_p, tdesc->reg_defs));
 137
 138   struct reg *reg = XCNEW (struct reg);
 139
 140   reg->name = name;
 141   reg->size = bitsize;
 142   VEC_safe_push (tdesc_reg_p, tdesc->reg_defs, reg);
 143 }
 144
 145 /* See arch/tdesc.h.  */
 146
 147 struct tdesc_type *
 148 tdesc_create_vector (struct tdesc_feature *feature, const char *name,
 149                      struct tdesc_type *field_type, int count)
 150 {
 151   return NULL;
 152 }
 153
 154 void
 155 tdesc_add_bitfield (struct tdesc_type *type, const char *field_name,
 156                     int start, int end)
 157 {}
 158
 159 /* See arch/tdesc.h.  */
 160
 161 void
 162 tdesc_add_field (struct tdesc_type *type, const char *field_name,
 163                  struct tdesc_type *field_type)
 164 {}
 165
 166 /* See arch/tdesc.h.  */
 167
 168 void
 169 tdesc_set_struct_size (struct tdesc_type *type, int size)
 170 {
 171 }