gdb/gdbserver/regcache.c

   1 /* Register support routines for the remote server for GDB.
   2    Copyright 2001, 2002
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   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,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "server.h"
  23 #include "regdef.h"
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 static char *registers;
  29 static int register_bytes;
  30
  31 static struct reg *reg_defs;
  32 static int num_registers;
  33
  34 const char **gdbserver_expedite_regs;
  35
  36 int
  37 registers_length (void)
  38 {
  39   return 2 * register_bytes;
  40 }
  41
  42 void
  43 set_register_cache (struct reg *regs, int n)
  44 {
  45   int offset, i;
  46
  47   reg_defs = regs;
  48   num_registers = n;
  49
  50   offset = 0;
  51   for (i = 0; i < n; i++)
  52     {
  53       regs[i].offset = offset;
  54       offset += regs[i].size;
  55     }
  56
  57   register_bytes = offset / 8;
  58   registers = malloc (offset / 8);
  59   if (!registers)
  60     fatal ("Could not allocate register cache.");
  61 }
  62
  63 void
  64 registers_to_string (char *buf)
  65 {
  66   convert_int_to_ascii (registers, buf, register_bytes);
  67 }
  68
  69 void
  70 registers_from_string (char *buf)
  71 {
  72   int len = strlen (buf);
  73
  74   if (len != register_bytes * 2)
  75     {
  76       warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len);
  77       if (len > register_bytes * 2)
  78         len = register_bytes * 2;
  79     }
  80   convert_ascii_to_int (buf, registers, len / 2);
  81 }
  82
  83 struct reg *
  84 find_register_by_name (const char *name)
  85 {
  86   int i;
  87
  88   for (i = 0; i < num_registers; i++)
  89     if (!strcmp (name, reg_defs[i].name))
  90       return &reg_defs[i];
  91   fatal ("Unknown register %s requested", name);
  92   return 0;
  93 }
  94
  95 int
  96 find_regno (const char *name)
  97 {
  98   int i;
  99
 100   for (i = 0; i < num_registers; i++)
 101     if (!strcmp (name, reg_defs[i].name))
 102       return i;
 103   fatal ("Unknown register %s requested", name);
 104   return -1;
 105 }
 106
 107 struct reg *
 108 find_register_by_number (int n)
 109 {
 110   return &reg_defs[n];
 111 }
 112
 113 int
 114 register_size (int n)
 115 {
 116   return reg_defs[n].size / 8;
 117 }
 118
 119 char *
 120 register_data (int n)
 121 {
 122   return registers + (reg_defs[n].offset / 8);
 123 }
 124
 125 void
 126 supply_register (int n, const void *buf)
 127 {
 128   memcpy (register_data (n), buf, register_size (n));
 129 }
 130
 131 void
 132 supply_register_by_name (const char *name, const void *buf)
 133 {
 134   supply_register (find_regno (name), buf);
 135 }
 136
 137 void
 138 collect_register (int n, void *buf)
 139 {
 140   memcpy (buf, register_data (n), register_size (n));
 141 }
 142
 143 void
 144 collect_register_by_name (const char *name, void *buf)
 145 {
 146   collect_register (find_regno (name), buf);
 147 }