mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
391 lines
11 KiB
C
391 lines
11 KiB
C
/* Remote target communications for the Macraigor Systems BDM Wiggler
|
||
talking to a Motorola PPC 8xx ADS board
|
||
Copyright 1996, 1997 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 "defs.h"
|
||
#include "gdbcore.h"
|
||
#include "gdb_string.h"
|
||
#include <fcntl.h>
|
||
#include "frame.h"
|
||
#include "inferior.h"
|
||
#include "bfd.h"
|
||
#include "symfile.h"
|
||
#include "target.h"
|
||
#include "gdb_wait.h"
|
||
#include "gdbcmd.h"
|
||
#include "objfiles.h"
|
||
#include "gdb-stabs.h"
|
||
#include <sys/types.h>
|
||
#include <signal.h>
|
||
#include "serial.h"
|
||
#include "ocd.h"
|
||
|
||
static void bdm_ppc_open (char *name, int from_tty);
|
||
|
||
static int bdm_ppc_wait (int pid, struct target_waitstatus *target_status);
|
||
|
||
static void bdm_ppc_fetch_registers (int regno);
|
||
|
||
static void bdm_ppc_store_registers (int regno);
|
||
|
||
extern struct target_ops bdm_ppc_ops; /* Forward decl */
|
||
|
||
/*#define BDM_NUM_REGS 71 */
|
||
#define BDM_NUM_REGS 24
|
||
|
||
#define BDM_REGMAP \
|
||
2048, 2049, 2050, 2051, 2052, 2053, 2054, 2055, /* r0-r7 */ \
|
||
2056, 2057, 2058, 2059, 2060, 2061, 2062, 2063, /* r8-r15 */ \
|
||
2064, 2065, 2066, 2067, 2068, 2069, 2070, 2071, /* r16-r23 */ \
|
||
2072, 2073, 2074, 2075, 2076, 2077, 2078, 2079, /* r24-r31 */ \
|
||
\
|
||
2080, 2082, 2084, 2086, 2088, 2090, 2092, 2094, /* fp0->fp8 */ \
|
||
2096, 2098, 2100, 2102, 2104, 2106, 2108, 2110, /* fp0->fp8 */ \
|
||
2112, 2114, 2116, 2118, 2120, 2122, 2124, 2126, /* fp0->fp8 */ \
|
||
2128, 2130, 2132, 2134, 2136, 2138, 2140, 2142, /* fp0->fp8 */ \
|
||
\
|
||
26, /* pc (SRR0 (SPR 26)) */ \
|
||
2146, /* ps (MSR) */ \
|
||
2144, /* cnd (CR) */ \
|
||
8, /* lr (SPR 8) */ \
|
||
9, /* cnt (CTR (SPR 9)) */ \
|
||
1, /* xer (SPR 1) */ \
|
||
0, /* mq (SPR 0) */
|
||
|
||
|
||
char nowatchdog[4] =
|
||
{0xff, 0xff, 0xff, 0x88};
|
||
|
||
/* Open a connection to a remote debugger.
|
||
NAME is the filename used for communication. */
|
||
|
||
static void
|
||
bdm_ppc_open (name, from_tty)
|
||
char *name;
|
||
int from_tty;
|
||
{
|
||
CORE_ADDR watchdogaddr = 0xff000004;
|
||
|
||
ocd_open (name, from_tty, OCD_TARGET_MOTO_PPC, &bdm_ppc_ops);
|
||
|
||
/* We want interrupts to drop us into debugging mode. */
|
||
/* Modify the DER register to accomplish this. */
|
||
ocd_write_bdm_register (149, 0x20024000);
|
||
|
||
/* Disable watchdog timer on the board */
|
||
ocd_write_bytes (watchdogaddr, nowatchdog, 4);
|
||
}
|
||
|
||
/* Wait until the remote machine stops, then return,
|
||
storing status in STATUS just as `wait' would.
|
||
Returns "pid" (though it's not clear what, if anything, that
|
||
means in the case of this target). */
|
||
|
||
static int
|
||
bdm_ppc_wait (pid, target_status)
|
||
int pid;
|
||
struct target_waitstatus *target_status;
|
||
{
|
||
int stop_reason;
|
||
|
||
target_status->kind = TARGET_WAITKIND_STOPPED;
|
||
|
||
stop_reason = ocd_wait ();
|
||
|
||
if (stop_reason)
|
||
{
|
||
target_status->value.sig = TARGET_SIGNAL_INT;
|
||
return inferior_pid;
|
||
}
|
||
|
||
target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */
|
||
|
||
#if 0
|
||
{
|
||
unsigned long ecr, der;
|
||
|
||
ecr = ocd_read_bdm_register (148); /* Read the exception cause register */
|
||
der = ocd_read_bdm_register (149); /* Read the debug enables register */
|
||
fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der);
|
||
}
|
||
#endif
|
||
|
||
return inferior_pid;
|
||
}
|
||
|
||
static int bdm_regmap[] =
|
||
{BDM_REGMAP};
|
||
|
||
/* Read the remote registers into regs.
|
||
Fetch register REGNO, or all registers if REGNO == -1
|
||
|
||
The Wiggler uses the following codes to access the registers:
|
||
|
||
0 -> 1023 SPR 0 -> 1023
|
||
0 - SPR 0 - MQ
|
||
1 - SPR 1 - XER
|
||
8 - SPR 8 - LR
|
||
9 - SPR 9 - CTR (known as cnt in GDB)
|
||
26 - SPR 26 - SRR0 - pc
|
||
1024 -> 2047 DCR 0 -> DCR 1023 (IBM PPC 4xx only)
|
||
2048 -> 2079 R0 -> R31
|
||
2080 -> 2143 FP0 -> FP31 (64 bit regs) (IBM PPC 5xx only)
|
||
2144 CR (known as cnd in GDB)
|
||
2145 FPCSR
|
||
2146 MSR (known as ps in GDB)
|
||
*/
|
||
|
||
static void
|
||
bdm_ppc_fetch_registers (regno)
|
||
int regno;
|
||
{
|
||
int i;
|
||
unsigned char *regs, *beginregs, *endregs, *almostregs;
|
||
unsigned char midregs[32];
|
||
unsigned char mqreg[1];
|
||
int first_regno, last_regno;
|
||
int first_bdm_regno, last_bdm_regno;
|
||
int reglen, beginreglen, endreglen;
|
||
|
||
#if 1
|
||
for (i = 0; i < (FPLAST_REGNUM - FP0_REGNUM + 1); i++)
|
||
{
|
||
midregs[i] = -1;
|
||
}
|
||
mqreg[0] = -1;
|
||
#endif
|
||
|
||
if (regno == -1)
|
||
{
|
||
first_regno = 0;
|
||
last_regno = NUM_REGS - 1;
|
||
|
||
first_bdm_regno = 0;
|
||
last_bdm_regno = BDM_NUM_REGS - 1;
|
||
}
|
||
else
|
||
{
|
||
first_regno = regno;
|
||
last_regno = regno;
|
||
|
||
first_bdm_regno = bdm_regmap[regno];
|
||
last_bdm_regno = bdm_regmap[regno];
|
||
}
|
||
|
||
if (first_bdm_regno == -1)
|
||
{
|
||
supply_register (first_regno, NULL);
|
||
return; /* Unsupported register */
|
||
}
|
||
|
||
#if 1
|
||
/* Can't ask for floating point regs on ppc 8xx, also need to
|
||
avoid asking for the mq register. */
|
||
if (first_regno == last_regno) /* only want one reg */
|
||
{
|
||
/* printf("Asking for register %d\n", first_regno); */
|
||
|
||
/* if asking for an invalid register */
|
||
if ((first_regno == MQ_REGNUM) ||
|
||
((first_regno >= FP0_REGNUM) && (first_regno <= FPLAST_REGNUM)))
|
||
{
|
||
/* printf("invalid reg request!\n"); */
|
||
supply_register (first_regno, NULL);
|
||
return; /* Unsupported register */
|
||
}
|
||
else
|
||
{
|
||
regs = ocd_read_bdm_registers (first_bdm_regno,
|
||
last_bdm_regno, ®len);
|
||
}
|
||
}
|
||
else
|
||
/* want all regs */
|
||
{
|
||
/* printf("Asking for registers %d to %d\n", first_regno, last_regno); */
|
||
beginregs = ocd_read_bdm_registers (first_bdm_regno,
|
||
FP0_REGNUM - 1, &beginreglen);
|
||
endregs = (strcat (midregs,
|
||
ocd_read_bdm_registers (FPLAST_REGNUM + 1,
|
||
last_bdm_regno - 1, &endreglen)));
|
||
almostregs = (strcat (beginregs, endregs));
|
||
regs = (strcat (almostregs, mqreg));
|
||
reglen = beginreglen + 32 + endreglen + 1;
|
||
}
|
||
|
||
#endif
|
||
#if 0
|
||
regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, ®len);
|
||
#endif
|
||
|
||
for (i = first_regno; i <= last_regno; i++)
|
||
{
|
||
int bdm_regno, regoffset;
|
||
|
||
bdm_regno = bdm_regmap[i];
|
||
if (bdm_regno != -1)
|
||
{
|
||
regoffset = bdm_regno - first_bdm_regno;
|
||
|
||
if (regoffset >= reglen / 4)
|
||
continue;
|
||
|
||
supply_register (i, regs + 4 * regoffset);
|
||
}
|
||
else
|
||
supply_register (i, NULL); /* Unsupported register */
|
||
}
|
||
}
|
||
|
||
/* Store register REGNO, or all registers if REGNO == -1, from the contents
|
||
of REGISTERS. FIXME: ignores errors. */
|
||
|
||
static void
|
||
bdm_ppc_store_registers (regno)
|
||
int regno;
|
||
{
|
||
int i;
|
||
int first_regno, last_regno;
|
||
int first_bdm_regno, last_bdm_regno;
|
||
|
||
if (regno == -1)
|
||
{
|
||
first_regno = 0;
|
||
last_regno = NUM_REGS - 1;
|
||
|
||
first_bdm_regno = 0;
|
||
last_bdm_regno = BDM_NUM_REGS - 1;
|
||
}
|
||
else
|
||
{
|
||
first_regno = regno;
|
||
last_regno = regno;
|
||
|
||
first_bdm_regno = bdm_regmap[regno];
|
||
last_bdm_regno = bdm_regmap[regno];
|
||
}
|
||
|
||
if (first_bdm_regno == -1)
|
||
return; /* Unsupported register */
|
||
|
||
for (i = first_regno; i <= last_regno; i++)
|
||
{
|
||
int bdm_regno;
|
||
|
||
bdm_regno = bdm_regmap[i];
|
||
|
||
/* only attempt to write if it's a valid ppc 8xx register */
|
||
/* (need to avoid FP regs and MQ reg) */
|
||
if ((i != MQ_REGNUM) && ((i < FP0_REGNUM) || (i > FPLAST_REGNUM)))
|
||
{
|
||
/* printf("write valid reg %d\n", bdm_regno); */
|
||
ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4);
|
||
}
|
||
/*
|
||
else if (i == MQ_REGNUM)
|
||
printf("don't write invalid reg %d (MQ_REGNUM)\n", bdm_regno);
|
||
else
|
||
printf("don't write invalid reg %d\n", bdm_regno);
|
||
*/
|
||
}
|
||
}
|
||
|
||
/* Define the target subroutine names */
|
||
|
||
struct target_ops bdm_ppc_ops;
|
||
|
||
static void
|
||
init_bdm_ppc_ops (void)
|
||
{
|
||
bdm_ppc_ops.to_shortname = "ocd";
|
||
bdm_ppc_ops.to_longname = "Remote target with On-Chip Debugging";
|
||
bdm_ppc_ops.to_doc = "Use a remote target with On-Chip Debugging. To use a target box;\n\
|
||
specify the serial device it is connected to (e.g. /dev/ttya). To use\n\
|
||
a wiggler, specify wiggler and then the port it is connected to\n\
|
||
(e.g. wiggler lpt1)."; /* to_doc */
|
||
bdm_ppc_ops.to_open = bdm_ppc_open;
|
||
bdm_ppc_ops.to_close = ocd_close;
|
||
bdm_ppc_ops.to_attach = NULL;
|
||
bdm_ppc_ops.to_post_attach = NULL;
|
||
bdm_ppc_ops.to_require_attach = NULL;
|
||
bdm_ppc_ops.to_detach = ocd_detach;
|
||
bdm_ppc_ops.to_require_detach = NULL;
|
||
bdm_ppc_ops.to_resume = ocd_resume;
|
||
bdm_ppc_ops.to_wait = bdm_ppc_wait;
|
||
bdm_ppc_ops.to_post_wait = NULL;
|
||
bdm_ppc_ops.to_fetch_registers = bdm_ppc_fetch_registers;
|
||
bdm_ppc_ops.to_store_registers = bdm_ppc_store_registers;
|
||
bdm_ppc_ops.to_prepare_to_store = ocd_prepare_to_store;
|
||
bdm_ppc_ops.to_xfer_memory = ocd_xfer_memory;
|
||
bdm_ppc_ops.to_files_info = ocd_files_info;
|
||
bdm_ppc_ops.to_insert_breakpoint = ocd_insert_breakpoint;
|
||
bdm_ppc_ops.to_remove_breakpoint = ocd_remove_breakpoint;
|
||
bdm_ppc_ops.to_terminal_init = NULL;
|
||
bdm_ppc_ops.to_terminal_inferior = NULL;
|
||
bdm_ppc_ops.to_terminal_ours_for_output = NULL;
|
||
bdm_ppc_ops.to_terminal_ours = NULL;
|
||
bdm_ppc_ops.to_terminal_info = NULL;
|
||
bdm_ppc_ops.to_kill = ocd_kill;
|
||
bdm_ppc_ops.to_load = ocd_load;
|
||
bdm_ppc_ops.to_lookup_symbol = NULL;
|
||
bdm_ppc_ops.to_create_inferior = ocd_create_inferior;
|
||
bdm_ppc_ops.to_post_startup_inferior = NULL;
|
||
bdm_ppc_ops.to_acknowledge_created_inferior = NULL;
|
||
bdm_ppc_ops.to_clone_and_follow_inferior = NULL;
|
||
bdm_ppc_ops.to_post_follow_inferior_by_clone = NULL;
|
||
bdm_ppc_ops.to_insert_fork_catchpoint = NULL;
|
||
bdm_ppc_ops.to_remove_fork_catchpoint = NULL;
|
||
bdm_ppc_ops.to_insert_vfork_catchpoint = NULL;
|
||
bdm_ppc_ops.to_remove_vfork_catchpoint = NULL;
|
||
bdm_ppc_ops.to_has_forked = NULL;
|
||
bdm_ppc_ops.to_has_vforked = NULL;
|
||
bdm_ppc_ops.to_can_follow_vfork_prior_to_exec = NULL;
|
||
bdm_ppc_ops.to_post_follow_vfork = NULL;
|
||
bdm_ppc_ops.to_insert_exec_catchpoint = NULL;
|
||
bdm_ppc_ops.to_remove_exec_catchpoint = NULL;
|
||
bdm_ppc_ops.to_has_execd = NULL;
|
||
bdm_ppc_ops.to_reported_exec_events_per_exec_call = NULL;
|
||
bdm_ppc_ops.to_has_exited = NULL;
|
||
bdm_ppc_ops.to_mourn_inferior = ocd_mourn;
|
||
bdm_ppc_ops.to_can_run = 0;
|
||
bdm_ppc_ops.to_notice_signals = 0;
|
||
bdm_ppc_ops.to_thread_alive = ocd_thread_alive;
|
||
bdm_ppc_ops.to_stop = ocd_stop;
|
||
bdm_ppc_ops.to_pid_to_exec_file = NULL;
|
||
bdm_ppc_ops.to_core_file_to_sym_file = NULL;
|
||
bdm_ppc_ops.to_stratum = process_stratum;
|
||
bdm_ppc_ops.DONT_USE = NULL;
|
||
bdm_ppc_ops.to_has_all_memory = 1;
|
||
bdm_ppc_ops.to_has_memory = 1;
|
||
bdm_ppc_ops.to_has_stack = 1;
|
||
bdm_ppc_ops.to_has_registers = 1;
|
||
bdm_ppc_ops.to_has_execution = 1;
|
||
bdm_ppc_ops.to_sections = NULL;
|
||
bdm_ppc_ops.to_sections_end = NULL;
|
||
bdm_ppc_ops.to_magic = OPS_MAGIC;
|
||
} /* init_bdm_ppc_ops */
|
||
|
||
void
|
||
_initialize_bdm_ppc ()
|
||
{
|
||
init_bdm_ppc_ops ();
|
||
add_target (&bdm_ppc_ops);
|
||
}
|