0819541366
1. Add get_thread_reg() to rtos. It's used in rtos_get_gdb_reg() to read the value of a single register, instead of reading all register values by calling get_thread_reg_list(). 2. Add set_reg() to rtos. gdb_server uses this to change a single register value for a specific thread. 3. Add target_get_gdb_reg_list_noread() so it's possible for gdb to get a list of registers without attempting to read their contents. The clang static checker doesn't find any new problems with this change. Change-Id: I77f792d1238cb015b91527ca8cb99593ccc8870e Signed-off-by: Tim Newsome <tim@sifive.com> Reviewed-on: http://openocd.zylin.com/5114 Tested-by: jenkins Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2007,2008 Øyvind Harboe *
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* oyvind.harboe@zylin.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "register.h"
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#include <helper/log.h>
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/**
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* @file
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* Holds utilities to work with register caches.
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*
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* OpenOCD uses machine registers internally, and exposes them by name
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* to Tcl scripts. Sets of related registers are grouped into caches.
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* For example, a CPU core will expose a set of registers, and there
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* may be separate registers associated with debug or trace modules.
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*/
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struct reg *register_get_by_number(struct reg_cache *first,
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uint32_t reg_num, bool search_all)
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{
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unsigned i;
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struct reg_cache *cache = first;
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while (cache) {
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for (i = 0; i < cache->num_regs; i++) {
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if (cache->reg_list[i].exist == false)
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continue;
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if (cache->reg_list[i].number == reg_num)
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return &(cache->reg_list[i]);
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}
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if (search_all)
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cache = cache->next;
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else
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break;
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}
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return NULL;
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}
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struct reg *register_get_by_name(struct reg_cache *first,
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const char *name, bool search_all)
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{
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unsigned i;
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struct reg_cache *cache = first;
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while (cache) {
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for (i = 0; i < cache->num_regs; i++) {
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if (cache->reg_list[i].exist == false)
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continue;
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if (strcmp(cache->reg_list[i].name, name) == 0)
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return &(cache->reg_list[i]);
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}
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if (search_all)
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cache = cache->next;
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else
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break;
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}
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return NULL;
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}
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struct reg_cache **register_get_last_cache_p(struct reg_cache **first)
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{
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struct reg_cache **cache_p = first;
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if (*cache_p)
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while (*cache_p)
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cache_p = &((*cache_p)->next);
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else
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return first;
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return cache_p;
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}
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void register_unlink_cache(struct reg_cache **cache_p, const struct reg_cache *cache)
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{
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while (*cache_p && *cache_p != cache)
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cache_p = &((*cache_p)->next);
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if (*cache_p)
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*cache_p = cache->next;
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}
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/** Marks the contents of the register cache as invalid (and clean). */
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void register_cache_invalidate(struct reg_cache *cache)
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{
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struct reg *reg = cache->reg_list;
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for (unsigned n = cache->num_regs; n != 0; n--, reg++) {
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if (reg->exist == false)
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continue;
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reg->valid = false;
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reg->dirty = false;
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}
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}
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static int register_get_dummy_core_reg(struct reg *reg)
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{
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return ERROR_OK;
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}
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static int register_set_dummy_core_reg(struct reg *reg, uint8_t *buf)
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{
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reg->dirty = true;
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reg->valid = true;
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return ERROR_OK;
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}
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static const struct reg_arch_type dummy_type = {
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.get = register_get_dummy_core_reg,
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.set = register_set_dummy_core_reg,
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};
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void register_init_dummy(struct reg *reg)
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{
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reg->type = &dummy_type;
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}
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