5419c9bea378c64bd600a7583d1009e5e3a93038
1 /* Register support routines for the remote server for GDB.
2 Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010
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 static int register_bytes
;
28 static struct reg
*reg_defs
;
29 static int num_registers
;
31 const char **gdbserver_expedite_regs
;
33 #ifndef IN_PROCESS_AGENT
36 get_thread_regcache (struct thread_info
*thread
, int fetch
)
38 struct regcache
*regcache
;
40 regcache
= (struct regcache
*) inferior_regcache_data (thread
);
43 fatal ("no register cache");
45 if (fetch
&& regcache
->registers_valid
== 0)
47 struct thread_info
*saved_inferior
= current_inferior
;
49 current_inferior
= thread
;
50 fetch_inferior_registers (regcache
, -1);
51 current_inferior
= saved_inferior
;
52 regcache
->registers_valid
= 1;
59 regcache_invalidate_one (struct inferior_list_entry
*entry
)
61 struct thread_info
*thread
= (struct thread_info
*) entry
;
62 struct regcache
*regcache
;
64 regcache
= (struct regcache
*) inferior_regcache_data (thread
);
69 if (regcache
->registers_valid
)
71 struct thread_info
*saved_inferior
= current_inferior
;
73 current_inferior
= thread
;
74 store_inferior_registers (regcache
, -1);
75 current_inferior
= saved_inferior
;
78 regcache
->registers_valid
= 0;
82 regcache_invalidate (void)
84 for_each_inferior (&all_threads
, regcache_invalidate_one
);
90 init_register_cache (struct regcache
*regcache
, unsigned char *regbuf
)
92 #ifndef IN_PROCESS_AGENT
95 /* Make sure to zero-initialize the register cache when it is
96 created, in case there are registers the target never
97 fetches. This way they'll read as zero instead of
99 regcache
->registers
= xcalloc (1, register_bytes
);
100 regcache
->registers_owned
= 1;
105 fatal ("init_register_cache: can't allocate memory from the heap");
109 regcache
->registers
= regbuf
;
110 regcache
->registers_owned
= 0;
113 regcache
->registers_valid
= 0;
118 #ifndef IN_PROCESS_AGENT
121 new_register_cache (void)
123 struct regcache
*regcache
;
125 if (register_bytes
== 0)
126 return NULL
; /* The architecture hasn't been initialized yet. */
128 regcache
= xmalloc (sizeof (*regcache
));
129 return init_register_cache (regcache
, NULL
);
133 free_register_cache (struct regcache
*regcache
)
137 if (regcache
->registers_owned
)
138 free (regcache
->registers
);
146 regcache_cpy (struct regcache
*dst
, struct regcache
*src
)
148 memcpy (dst
->registers
, src
->registers
, register_bytes
);
149 dst
->registers_valid
= src
->registers_valid
;
152 #ifndef IN_PROCESS_AGENT
154 realloc_register_cache (struct inferior_list_entry
*thread_p
)
156 struct thread_info
*thread
= (struct thread_info
*) thread_p
;
157 struct regcache
*regcache
158 = (struct regcache
*) inferior_regcache_data (thread
);
160 if (regcache
!= NULL
)
161 regcache_invalidate_one (thread_p
);
162 free_register_cache (regcache
);
163 set_inferior_regcache_data (thread
, new_register_cache ());
168 set_register_cache (struct reg
*regs
, int n
)
172 #ifndef IN_PROCESS_AGENT
173 /* Before changing the register cache internal layout, flush the
174 contents of valid caches back to the threads. */
175 regcache_invalidate ();
182 for (i
= 0; i
< n
; i
++)
184 regs
[i
].offset
= offset
;
185 offset
+= regs
[i
].size
;
188 register_bytes
= offset
/ 8;
190 /* Make sure PBUFSIZ is large enough to hold a full register packet. */
191 if (2 * register_bytes
+ 32 > PBUFSIZ
)
192 fatal ("Register packet size exceeds PBUFSIZ.");
194 #ifndef IN_PROCESS_AGENT
195 /* Re-allocate all pre-existing register caches. */
196 for_each_inferior (&all_threads
, realloc_register_cache
);
201 register_cache_size (void)
203 return register_bytes
;
206 #ifndef IN_PROCESS_AGENT
209 registers_to_string (struct regcache
*regcache
, char *buf
)
211 unsigned char *registers
= regcache
->registers
;
213 convert_int_to_ascii (registers
, buf
, register_bytes
);
217 registers_from_string (struct regcache
*regcache
, char *buf
)
219 int len
= strlen (buf
);
220 unsigned char *registers
= regcache
->registers
;
222 if (len
!= register_bytes
* 2)
224 warning ("Wrong sized register packet (expected %d bytes, got %d)",
225 2*register_bytes
, len
);
226 if (len
> register_bytes
* 2)
227 len
= register_bytes
* 2;
229 convert_ascii_to_int (buf
, registers
, len
/ 2);
233 find_register_by_name (const char *name
)
237 for (i
= 0; i
< num_registers
; i
++)
238 if (!strcmp (name
, reg_defs
[i
].name
))
240 fatal ("Unknown register %s requested", name
);
245 find_regno (const char *name
)
249 for (i
= 0; i
< num_registers
; i
++)
250 if (!strcmp (name
, reg_defs
[i
].name
))
252 fatal ("Unknown register %s requested", name
);
257 find_register_by_number (int n
)
265 register_size (int n
)
267 return reg_defs
[n
].size
/ 8;
270 static unsigned char *
271 register_data (struct regcache
*regcache
, int n
, int fetch
)
273 return regcache
->registers
+ (reg_defs
[n
].offset
/ 8);
277 supply_register (struct regcache
*regcache
, int n
, const void *buf
)
280 memcpy (register_data (regcache
, n
, 0), buf
, register_size (n
));
282 memset (register_data (regcache
, n
, 0), 0, register_size (n
));
286 supply_regblock (struct regcache
*regcache
, const void *buf
)
289 memcpy (regcache
->registers
, buf
, register_bytes
);
291 memset (regcache
->registers
, 0, register_bytes
);
294 #ifndef IN_PROCESS_AGENT
297 supply_register_by_name (struct regcache
*regcache
,
298 const char *name
, const void *buf
)
300 supply_register (regcache
, find_regno (name
), buf
);
306 collect_register (struct regcache
*regcache
, int n
, void *buf
)
308 memcpy (buf
, register_data (regcache
, n
, 1), register_size (n
));
311 #ifndef IN_PROCESS_AGENT
314 collect_register_as_string (struct regcache
*regcache
, int n
, char *buf
)
316 convert_int_to_ascii (register_data (regcache
, n
, 1),
317 buf
, register_size (n
));
321 collect_register_by_name (struct regcache
*regcache
,
322 const char *name
, void *buf
)
324 collect_register (regcache
, find_regno (name
), buf
);
327 /* Special handling for register PC. */
330 regcache_read_pc (struct regcache
*regcache
)
334 if (the_target
->read_pc
)
335 pc_val
= the_target
->read_pc (regcache
);
337 internal_error (__FILE__
, __LINE__
,
338 "regcache_read_pc: Unable to find PC");
344 regcache_write_pc (struct regcache
*regcache
, CORE_ADDR pc
)
346 if (the_target
->write_pc
)
347 the_target
->write_pc (regcache
, pc
);
349 internal_error (__FILE__
, __LINE__
,
350 "regcache_write_pc: Unable to update PC");
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