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/* Remote debugging interface to Xilinx MicroBlaze.
Copyright (C) 2009-2013 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "target.h"
#include "monitor.h"
#include <string.h>
#include "serial.h"
#include "regcache.h"
void _initialize_picobug_rom (void);
static char *picobug_inits[] =
{"\r", NULL};
static struct target_ops picobug_ops;
static struct monitor_ops picobug_cmds;
/* Picobug only supports a subset of registers from MCore. In reality,
it doesn't support ss1, either. */
static char *picobug_regnames[] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
"psr", "vbr", "epsr", "fpsr", "epc", "fpc", 0, "ss1",
"ss2", "ss3", "ss4", 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
"pc" };
static void
picobug_open (char *args, int from_tty)
{
monitor_open (args, &picobug_cmds, from_tty);
}
/* We choose to write our own dumpregs routine, since the output of
the register dumping is rather difficult to encapsulate in a
regexp:
picobug> rd
pc 2f00031e epc 2f00031e fpc 00000000
psr 80000101 epsr 80000101 fpsr 00000000
ss0-ss4 bad0beef 00000000 00000000 00000000 00000000 vbr 30005c00
r0-r7 2f0fff4c 00000090 00000001 00000002 00000003 00000004 00000005 00000006
r8-r15 2f0fff64 00000000 00000000 00000000 00000000 00000000 00000000 2f00031e
*/
static int
picobug_dumpregs (struct regcache *regcache)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
char buf[1024];
int resp_len;
char *p;
/* Send the dump register command to the monitor and
get the reply. */
monitor_printf (picobug_cmds.dump_registers);
resp_len = monitor_expect_prompt (buf, sizeof (buf));
p = strtok (buf, " \t\r\n");
while (p)
{
if (strchr (p, '-'))
{
/* Got a range. Either r0-r7, r8-r15 or ss0-ss4. */
if (strncmp (p, "r0", 2) == 0 || strncmp (p, "r8", 2) == 0)
{
int rn = (p[1] == '0' ? 0 : 8);
int i = 0;
/* Get the next 8 values and record them. */
while (i < 8)
{
p = strtok (NULL, " \t\r\n");
if (p)
monitor_supply_register (regcache, rn + i, p);
i++;
}
}
else if (strncmp (p, "ss", 2) == 0)
{
/* Get the next five values, ignoring the first. */
int rn;
p = strtok (NULL, " \t\r\n");
for (rn = 39; rn < 43; rn++)
{
p = strtok (NULL, " \t\r\n");
if (p)
monitor_supply_register (regcache, rn, p);
}
}
else
{
break;
}
}
else
{
/* Simple register type, paired. */
char *name = p;
int i;
/* Get and record value. */
p = strtok (NULL, " \t\r\n");
if (p)
{
for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
{
if (picobug_regnames[i]
&& strcmp (picobug_regnames[i], name) == 0)
break;
}
if (i <= gdbarch_num_regs (gdbarch))
monitor_supply_register (regcache, i, p);
}
}
p = strtok (NULL, " \t\r\n");
}
return 0;
}
static void
init_picobug_cmds (void)
{
picobug_cmds.flags = MO_GETMEM_NEEDS_RANGE | MO_CLR_BREAK_USES_ADDR
| MO_PRINT_PROGRAM_OUTPUT;
picobug_cmds.init = picobug_inits; /* Init strings */
picobug_cmds.cont = "g\n"; /* continue command */
picobug_cmds.step = "s\n"; /* single step */
picobug_cmds.set_break = "br %x\n"; /* set a breakpoint */
picobug_cmds.clr_break = "nobr %x\n"; /* clear a breakpoint */
picobug_cmds.clr_all_break = "nobr\n"; /* clear all breakpoints */
picobug_cmds.setmem.cmdb = "mm %x %x ;b\n"; /* setmem.cmdb (addr, value) */
picobug_cmds.setmem.cmdw = "mm %x %x ;h\n"; /* setmem.cmdw (addr, value) */
picobug_cmds.setmem.cmdl = "mm %x %x ;w\n"; /* setmem.cmdl (addr, value) */
picobug_cmds.getmem.cmdb = "md %x %x\n"; /* getmem.cmdb (start addr,
end addr) */
picobug_cmds.getmem.resp_delim = ":"; /* getmem.resp_delim */
picobug_cmds.setreg.cmd = "rm %s %x\n"; /* setreg.cmd (name, value) */
picobug_cmds.getreg.cmd = "rd %s\n"; /* getreg.cmd (name) */
picobug_cmds.getreg.resp_delim = ":"; /* getreg.resp_delim */
picobug_cmds.dump_registers = "rd\n"; /* dump_registers */
picobug_cmds.dumpregs = picobug_dumpregs; /* dump registers parser */
picobug_cmds.load = "lo\n"; /* download command */
picobug_cmds.prompt = "picobug> "; /* monitor command prompt */
picobug_cmds.line_term = "\n"; /* end-of-line terminator */
picobug_cmds.target = &picobug_ops; /* target operations */
picobug_cmds.stopbits = SERIAL_1_STOPBITS; /* number of stop bits */
picobug_cmds.regnames = picobug_regnames; /* registers names */
picobug_cmds.num_breakpoints = 20; /* number of breakpoints */
picobug_cmds.magic = MONITOR_OPS_MAGIC; /* magic */
}
void
_initialize_picobug_rom (void)
{
int i;
/* Initialize m32r RevC monitor target. */
init_picobug_cmds ();
init_monitor_ops (&picobug_ops);
picobug_ops.to_shortname = "picobug";
picobug_ops.to_longname = "picobug monitor";
picobug_ops.to_doc = "Debug via the picobug monitor.\n\
Specify the serial device it is connected to (e.g. /dev/ttya).";
picobug_ops.to_open = picobug_open;
add_target (&picobug_ops);
}
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