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/* Register support routines for the remote server for GDB.
Copyright 2001, 2002
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "server.h"
#include "regdef.h"
#include <stdlib.h>
#include <string.h>
/* The private data for the register cache. Note that we have one
per inferior; this is primarily for simplicity, as the performance
benefit is minimal. */
struct inferior_regcache_data
{
int registers_valid;
char *registers;
};
static int register_bytes;
static struct reg *reg_defs;
static int num_registers;
const char **gdbserver_expedite_regs;
static struct inferior_regcache_data *
get_regcache (struct thread_info *inf, int fetch)
{
struct inferior_regcache_data *regcache;
regcache = (struct inferior_regcache_data *) inferior_regcache_data (inf);
if (regcache == NULL)
fatal ("no register cache");
/* FIXME - fetch registers for INF */
if (fetch && regcache->registers_valid == 0)
{
fetch_inferior_registers (0);
regcache->registers_valid = 1;
}
return regcache;
}
void
regcache_invalidate_one (struct inferior_list_entry *entry)
{
struct thread_info *thread = (struct thread_info *) entry;
struct inferior_regcache_data *regcache;
regcache = (struct inferior_regcache_data *) inferior_regcache_data (thread);
if (regcache->registers_valid)
{
struct thread_info *saved_inferior = current_inferior;
current_inferior = thread;
store_inferior_registers (-1);
current_inferior = saved_inferior;
}
regcache->registers_valid = 0;
}
void
regcache_invalidate ()
{
for_each_inferior (&all_threads, regcache_invalidate_one);
}
int
registers_length (void)
{
return 2 * register_bytes;
}
void *
new_register_cache (void)
{
struct inferior_regcache_data *regcache;
regcache = malloc (sizeof (*regcache));
regcache->registers = malloc (register_bytes);
if (regcache->registers == NULL)
fatal ("Could not allocate register cache.");
regcache->registers_valid = 0;
return regcache;
}
void
free_register_cache (void *regcache_p)
{
struct inferior_regcache_data *regcache
= (struct inferior_regcache_data *) regcache_p;
free (regcache->registers);
free (regcache);
}
void
set_register_cache (struct reg *regs, int n)
{
int offset, i;
reg_defs = regs;
num_registers = n;
offset = 0;
for (i = 0; i < n; i++)
{
regs[i].offset = offset;
offset += regs[i].size;
}
register_bytes = offset / 8;
}
void
registers_to_string (char *buf)
{
char *registers = get_regcache (current_inferior, 1)->registers;
convert_int_to_ascii (registers, buf, register_bytes);
}
void
registers_from_string (char *buf)
{
int len = strlen (buf);
char *registers = get_regcache (current_inferior, 1)->registers;
if (len != register_bytes * 2)
{
warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len);
if (len > register_bytes * 2)
len = register_bytes * 2;
}
convert_ascii_to_int (buf, registers, len / 2);
}
struct reg *
find_register_by_name (const char *name)
{
int i;
for (i = 0; i < num_registers; i++)
if (!strcmp (name, reg_defs[i].name))
return ®_defs[i];
fatal ("Unknown register %s requested", name);
return 0;
}
int
find_regno (const char *name)
{
int i;
for (i = 0; i < num_registers; i++)
if (!strcmp (name, reg_defs[i].name))
return i;
fatal ("Unknown register %s requested", name);
return -1;
}
struct reg *
find_register_by_number (int n)
{
return ®_defs[n];
}
int
register_size (int n)
{
return reg_defs[n].size / 8;
}
static char *
register_data (int n, int fetch)
{
char *registers = get_regcache (current_inferior, fetch)->registers;
return registers + (reg_defs[n].offset / 8);
}
void
supply_register (int n, const void *buf)
{
memcpy (register_data (n, 0), buf, register_size (n));
}
void
supply_register_by_name (const char *name, const void *buf)
{
supply_register (find_regno (name), buf);
}
void
collect_register (int n, void *buf)
{
memcpy (buf, register_data (n, 1), register_size (n));
}
void
collect_register_as_string (int n, char *buf)
{
convert_int_to_ascii (register_data (n, 1), buf, register_size (n));
}
void
collect_register_by_name (const char *name, void *buf)
{
collect_register (find_regno (name), buf);
}
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