1 /* Register support routines for the remote server for GDB.
2 Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 /* The private data for the register cache. Note that we have one
27 per inferior; this is primarily for simplicity, as the performance
28 benefit is minimal. */
30 struct inferior_regcache_data
33 unsigned char *registers
;
36 static int register_bytes
;
38 static struct reg
*reg_defs
;
39 static int num_registers
;
41 const char **gdbserver_expedite_regs
;
43 static struct inferior_regcache_data
*
44 get_regcache (struct thread_info
*inf
, int fetch
)
46 struct inferior_regcache_data
*regcache
;
48 regcache
= (struct inferior_regcache_data
*) inferior_regcache_data (inf
);
51 fatal ("no register cache");
53 /* FIXME - fetch registers for INF */
54 if (fetch
&& regcache
->registers_valid
== 0)
56 fetch_inferior_registers (0);
57 regcache
->registers_valid
= 1;
64 regcache_invalidate_one (struct inferior_list_entry
*entry
)
66 struct thread_info
*thread
= (struct thread_info
*) entry
;
67 struct inferior_regcache_data
*regcache
;
69 regcache
= (struct inferior_regcache_data
*) inferior_regcache_data (thread
);
71 if (regcache
->registers_valid
)
73 struct thread_info
*saved_inferior
= current_inferior
;
75 current_inferior
= thread
;
76 store_inferior_registers (-1);
77 current_inferior
= saved_inferior
;
80 regcache
->registers_valid
= 0;
84 regcache_invalidate ()
86 for_each_inferior (&all_threads
, regcache_invalidate_one
);
90 new_register_cache (void)
92 struct inferior_regcache_data
*regcache
;
94 regcache
= malloc (sizeof (*regcache
));
96 /* Make sure to zero-initialize the register cache when it is created,
97 in case there are registers the target never fetches. This way they'll
98 read as zero instead of garbage. */
99 regcache
->registers
= calloc (1, register_bytes
);
100 if (regcache
->registers
== NULL
)
101 fatal ("Could not allocate register cache.");
103 regcache
->registers_valid
= 0;
109 free_register_cache (void *regcache_p
)
111 struct inferior_regcache_data
*regcache
112 = (struct inferior_regcache_data
*) regcache_p
;
114 free (regcache
->registers
);
119 realloc_register_cache (struct inferior_list_entry
*thread_p
)
121 struct thread_info
*thread
= (struct thread_info
*) thread_p
;
123 free_register_cache (inferior_regcache_data (thread
));
124 set_inferior_regcache_data (thread
, new_register_cache ());
128 set_register_cache (struct reg
*regs
, int n
)
136 for (i
= 0; i
< n
; i
++)
138 regs
[i
].offset
= offset
;
139 offset
+= regs
[i
].size
;
142 register_bytes
= offset
/ 8;
144 /* Make sure PBUFSIZ is large enough to hold a full register packet. */
145 if (2 * register_bytes
+ 32 > PBUFSIZ
)
146 fatal ("Register packet size exceeds PBUFSIZ.");
148 /* Re-allocate all pre-existing register caches. */
149 for_each_inferior (&all_threads
, realloc_register_cache
);
153 registers_to_string (char *buf
)
155 unsigned char *registers
= get_regcache (current_inferior
, 1)->registers
;
157 convert_int_to_ascii (registers
, buf
, register_bytes
);
161 registers_from_string (char *buf
)
163 int len
= strlen (buf
);
164 unsigned char *registers
= get_regcache (current_inferior
, 1)->registers
;
166 if (len
!= register_bytes
* 2)
168 warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes
, len
);
169 if (len
> register_bytes
* 2)
170 len
= register_bytes
* 2;
172 convert_ascii_to_int (buf
, registers
, len
/ 2);
176 find_register_by_name (const char *name
)
180 for (i
= 0; i
< num_registers
; i
++)
181 if (!strcmp (name
, reg_defs
[i
].name
))
183 fatal ("Unknown register %s requested", name
);
188 find_regno (const char *name
)
192 for (i
= 0; i
< num_registers
; i
++)
193 if (!strcmp (name
, reg_defs
[i
].name
))
195 fatal ("Unknown register %s requested", name
);
200 find_register_by_number (int n
)
206 register_size (int n
)
208 return reg_defs
[n
].size
/ 8;
211 static unsigned char *
212 register_data (int n
, int fetch
)
214 unsigned char *registers
215 = get_regcache (current_inferior
, fetch
)->registers
;
217 return registers
+ (reg_defs
[n
].offset
/ 8);
221 supply_register (int n
, const void *buf
)
223 memcpy (register_data (n
, 0), buf
, register_size (n
));
227 supply_register_by_name (const char *name
, const void *buf
)
229 supply_register (find_regno (name
), buf
);
233 collect_register (int n
, void *buf
)
235 memcpy (buf
, register_data (n
, 1), register_size (n
));
239 collect_register_as_string (int n
, char *buf
)
241 convert_int_to_ascii (register_data (n
, 1), buf
, register_size (n
));
245 collect_register_by_name (const char *name
, void *buf
)
247 collect_register (find_regno (name
), buf
);
This page took 0.037051 seconds and 4 git commands to generate.