target/cortex_m: do not leak memory on reexamination
[openocd.git] / src / target / register.c
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2007,2008 √ėyvind Harboe *
6 * oyvind.harboe@zylin.com *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
22 ***************************************************************************/
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include "register.h"
29 #include <helper/log.h>
30
31 /**
32 * @file
33 * Holds utilities to work with register caches.
34 *
35 * OpenOCD uses machine registers internally, and exposes them by name
36 * to Tcl scripts. Sets of related registers are grouped into caches.
37 * For example, a CPU core will expose a set of registers, and there
38 * may be separate registers associated with debug or trace modules.
39 */
40
41 struct reg *register_get_by_name(struct reg_cache *first,
42 const char *name, bool search_all)
43 {
44 unsigned i;
45 struct reg_cache *cache = first;
46
47 while (cache) {
48 for (i = 0; i < cache->num_regs; i++) {
49 if (strcmp(cache->reg_list[i].name, name) == 0)
50 return &(cache->reg_list[i]);
51 }
52
53 if (search_all)
54 cache = cache->next;
55 else
56 break;
57 }
58
59 return NULL;
60 }
61
62 struct reg_cache **register_get_last_cache_p(struct reg_cache **first)
63 {
64 struct reg_cache **cache_p = first;
65
66 if (*cache_p)
67 while (*cache_p)
68 cache_p = &((*cache_p)->next);
69 else
70 return first;
71
72 return cache_p;
73 }
74
75 void register_unlink_cache(struct reg_cache **cache_p, const struct reg_cache *cache)
76 {
77 while (*cache_p && *cache_p != cache)
78 cache_p = &((*cache_p)->next);
79 if (*cache_p)
80 *cache_p = cache->next;
81 }
82
83 /** Marks the contents of the register cache as invalid (and clean). */
84 void register_cache_invalidate(struct reg_cache *cache)
85 {
86 struct reg *reg = cache->reg_list;
87
88 for (unsigned n = cache->num_regs; n != 0; n--, reg++) {
89 reg->valid = 0;
90 reg->dirty = 0;
91 }
92 }
93
94 static int register_get_dummy_core_reg(struct reg *reg)
95 {
96 return ERROR_OK;
97 }
98
99 static int register_set_dummy_core_reg(struct reg *reg, uint8_t *buf)
100 {
101 reg->dirty = 1;
102 reg->valid = 1;
103
104 return ERROR_OK;
105 }
106
107 static const struct reg_arch_type dummy_type = {
108 .get = register_get_dummy_core_reg,
109 .set = register_set_dummy_core_reg,
110 };
111
112 void register_init_dummy(struct reg *reg)
113 {
114 reg->type = &dummy_type;
115 }

Linking to existing account procedure

If you already have an account and want to add another login method you MUST first sign in with your existing account and then change URL to read https://review.openocd.org/login/?link to get to this page again but this time it'll work for linking. Thank you.

SSH host keys fingerprints

1024 SHA256:YKx8b7u5ZWdcbp7/4AeXNaqElP49m6QrwfXaqQGJAOk gerrit-code-review@openocd.zylin.com (DSA)
384 SHA256:jHIbSQa4REvwCFG4cq5LBlBLxmxSqelQPem/EXIrxjk gerrit-code-review@openocd.org (ECDSA)
521 SHA256:UAOPYkU9Fjtcao0Ul/Rrlnj/OsQvt+pgdYSZ4jOYdgs gerrit-code-review@openocd.org (ECDSA)
256 SHA256:A13M5QlnozFOvTllybRZH6vm7iSt0XLxbA48yfc2yfY gerrit-code-review@openocd.org (ECDSA)
256 SHA256:spYMBqEYoAOtK7yZBrcwE8ZpYt6b68Cfh9yEVetvbXg gerrit-code-review@openocd.org (ED25519)
+--[ED25519 256]--+
|=..              |
|+o..   .         |
|*.o   . .        |
|+B . . .         |
|Bo. = o S        |
|Oo.+ + =         |
|oB=.* = . o      |
| =+=.+   + E     |
|. .=o   . o      |
+----[SHA256]-----+
2048 SHA256:0Onrb7/PHjpo6iVZ7xQX2riKN83FJ3KGU0TvI0TaFG4 gerrit-code-review@openocd.zylin.com (RSA)