126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/* GNU/Linux/CRIS specific low level interface, for the remote server for GDB.
|
|
Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
|
|
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 "linux-low.h"
|
|
#include <sys/ptrace.h>
|
|
|
|
/* CRISv10 */
|
|
#define cris_num_regs 32
|
|
|
|
/* Locations need to match <include/asm/arch/ptrace.h>. */
|
|
static int cris_regmap[] = {
|
|
15*4, 14*4, 13*4, 12*4,
|
|
11*4, 10*4, 9*4, 8*4,
|
|
7*4, 6*4, 5*4, 4*4,
|
|
3*4, 2*4, 23*4, 19*4,
|
|
|
|
-1, -1, -1, -1,
|
|
-1, 17*4, -1, 16*4,
|
|
-1, -1, -1, 18*4,
|
|
-1, 17*4, -1, -1
|
|
|
|
};
|
|
|
|
static int
|
|
cris_cannot_store_register (int regno)
|
|
{
|
|
if (cris_regmap[regno] == -1)
|
|
return 1;
|
|
|
|
return (regno >= cris_num_regs);
|
|
}
|
|
|
|
static int
|
|
cris_cannot_fetch_register (int regno)
|
|
{
|
|
if (cris_regmap[regno] == -1)
|
|
return 1;
|
|
|
|
return (regno >= cris_num_regs);
|
|
}
|
|
|
|
extern int debug_threads;
|
|
|
|
static CORE_ADDR
|
|
cris_get_pc (void)
|
|
{
|
|
unsigned long pc;
|
|
collect_register_by_name ("pc", &pc);
|
|
if (debug_threads)
|
|
fprintf (stderr, "stop pc is %08lx\n", pc);
|
|
return pc;
|
|
}
|
|
|
|
static void
|
|
cris_set_pc (CORE_ADDR pc)
|
|
{
|
|
unsigned long newpc = pc;
|
|
supply_register_by_name ("pc", &newpc);
|
|
}
|
|
|
|
static const unsigned short cris_breakpoint = 0xe938;
|
|
#define cris_breakpoint_len 2
|
|
|
|
static int
|
|
cris_breakpoint_at (CORE_ADDR where)
|
|
{
|
|
unsigned short insn;
|
|
|
|
(*the_target->read_memory) (where, (unsigned char *) &insn,
|
|
cris_breakpoint_len);
|
|
if (insn == cris_breakpoint)
|
|
return 1;
|
|
|
|
/* If necessary, recognize more trap instructions here. GDB only uses the
|
|
one. */
|
|
return 0;
|
|
}
|
|
|
|
/* We only place breakpoints in empty marker functions, and thread locking
|
|
is outside of the function. So rather than importing software single-step,
|
|
we can just run until exit. */
|
|
static CORE_ADDR
|
|
cris_reinsert_addr (void)
|
|
{
|
|
unsigned long pc;
|
|
collect_register_by_name ("srp", &pc);
|
|
return pc;
|
|
}
|
|
|
|
struct linux_target_ops the_low_target = {
|
|
cris_num_regs,
|
|
cris_regmap,
|
|
cris_cannot_fetch_register,
|
|
cris_cannot_store_register,
|
|
cris_get_pc,
|
|
cris_set_pc,
|
|
(const unsigned char *) &cris_breakpoint,
|
|
cris_breakpoint_len,
|
|
cris_reinsert_addr,
|
|
0,
|
|
cris_breakpoint_at,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
};
|