gdb/gdbserver/regcache.h

   1 /* Register support routines for the remote server for GDB.
   2    Copyright (C) 2001-2013 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef REGCACHE_H
  20 #define REGCACHE_H
  21
  22 struct inferior_list_entry;
  23 struct thread_info;
  24
  25 /* The register exists, it has a value, but we don't know what it is.
  26    Used when inspecting traceframes.  */
  27 #define REG_UNAVAILABLE 0
  28
  29 /* We know the register's value (and we have it cached).  */
  30 #define REG_VALID 1
  31
  32 /* The data for the register cache.  Note that we have one per
  33    inferior; this is primarily for simplicity, as the performance
  34    benefit is minimal.  */
  35
  36 struct regcache
  37 {
  38   /* Whether the REGISTERS buffer's contents are valid.  If false, we
  39      haven't fetched the registers from the target yet.  Not that this
  40      register cache is _not_ pass-through, unlike GDB's.  Note that
  41      "valid" here is unrelated to whether the registers are available
  42      in a traceframe.  For that, check REGISTER_STATUS below.  */
  43   int registers_valid;
  44   int registers_owned;
  45   unsigned char *registers;
  46 #ifndef IN_PROCESS_AGENT
  47   /* One of REG_UNAVAILBLE or REG_VALID.  */
  48   unsigned char *register_status;
  49 #endif
  50 };
  51
  52 struct regcache *init_register_cache (struct regcache *regcache,
  53                                       unsigned char *regbuf);
  54
  55 void regcache_cpy (struct regcache *dst, struct regcache *src);
  56
  57 /* Create a new register cache for INFERIOR.  */
  58
  59 struct regcache *new_register_cache (void);
  60
  61 struct regcache *get_thread_regcache (struct thread_info *thread, int fetch);
  62
  63 /* Release all memory associated with the register cache for INFERIOR.  */
  64
  65 void free_register_cache (struct regcache *regcache);
  66
  67 /* Invalidate cached registers for one or all threads.  */
  68
  69 void regcache_invalidate_one (struct inferior_list_entry *);
  70 void regcache_invalidate (void);
  71
  72 /* Convert all registers to a string in the currently specified remote
  73    format.  */
  74
  75 void registers_to_string (struct regcache *regcache, char *buf);
  76
  77 /* Convert a string to register values and fill our register cache.  */
  78
  79 void registers_from_string (struct regcache *regcache, char *buf);
  80
  81 CORE_ADDR regcache_read_pc (struct regcache *regcache);
  82
  83 void regcache_write_pc (struct regcache *regcache, CORE_ADDR pc);
  84
  85 /* Return a pointer to the description of register ``n''.  */
  86
  87 struct reg *find_register_by_number (int n);
  88
  89 int register_size (int n);
  90
  91 int register_cache_size (void);
  92
  93 int find_regno (const char *name);
  94
  95 /* The following two variables are set by auto-generated
  96    code in the init_registers_... routines.  */
  97 extern const char **gdbserver_expedite_regs;
  98 extern const char *gdbserver_xmltarget;
  99
 100 void supply_register (struct regcache *regcache, int n, const void *buf);
 101
 102 void supply_register_zeroed (struct regcache *regcache, int n);
 103
 104 void supply_register_by_name (struct regcache *regcache,
 105                               const char *name, const void *buf);
 106
 107 void supply_regblock (struct regcache *regcache, const void *buf);
 108
 109 void collect_register (struct regcache *regcache, int n, void *buf);
 110
 111 void collect_register_as_string (struct regcache *regcache, int n, char *buf);
 112
 113 void collect_register_by_name (struct regcache *regcache,
 114                                const char *name, void *buf);
 115
 116 #endif /* REGCACHE_H */