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remote-m32r-sdi.c
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/* Remote debugging interface for M32R/SDI.
Copyright (C) 2003-2015 Free Software Foundation, Inc.
Contributed by Renesas Technology Co.
Written by Kei Sakamoto <[email protected]>.
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 "gdbcmd.h"
#include "gdbcore.h"
#include "inferior.h"
#include "infrun.h"
#include "target.h"
#include "regcache.h"
#include "gdbthread.h"
#include <ctype.h>
#include <signal.h>
#ifdef __MINGW32__
#include <winsock2.h>
#else
#include <netinet/in.h>
#endif
#include <sys/types.h>
#include "gdb_sys_time.h"
#include <time.h>
#include "gdb_bfd.h"
#include "cli/cli-utils.h"
#include "symfile.h"
#include "serial.h"
/* Descriptor for I/O to remote machine. */
static struct serial *sdi_desc = NULL;
#define SDI_TIMEOUT 30
#define SDIPORT 3232
static char chip_name[64];
static int step_mode;
static unsigned long last_pc_addr = 0xffffffff;
static unsigned char last_pc_addr_data[2];
static int mmu_on = 0;
static int use_ib_breakpoints = 1;
#define MAX_BREAKPOINTS 1024
static int max_ib_breakpoints;
static unsigned long bp_address[MAX_BREAKPOINTS];
static unsigned char bp_data[MAX_BREAKPOINTS][4];
/* dbt -> nop */
static const unsigned char dbt_bp_entry[] = {
0x10, 0xe0, 0x70, 0x00
};
#define MAX_ACCESS_BREAKS 4
static int max_access_breaks;
static unsigned long ab_address[MAX_ACCESS_BREAKS];
static unsigned int ab_type[MAX_ACCESS_BREAKS];
static unsigned int ab_size[MAX_ACCESS_BREAKS];
static CORE_ADDR hit_watchpoint_addr = 0;
static int interrupted = 0;
/* Forward data declarations */
extern struct target_ops m32r_ops;
/* This is the ptid we use while we're connected to the remote. Its
value is arbitrary, as the target doesn't have a notion of
processes or threads, but we need something non-null to place in
inferior_ptid. */
static ptid_t remote_m32r_ptid;
/* Commands */
#define SDI_OPEN 1
#define SDI_CLOSE 2
#define SDI_RELEASE 3
#define SDI_READ_CPU_REG 4
#define SDI_WRITE_CPU_REG 5
#define SDI_READ_MEMORY 6
#define SDI_WRITE_MEMORY 7
#define SDI_EXEC_CPU 8
#define SDI_STOP_CPU 9
#define SDI_WAIT_FOR_READY 10
#define SDI_GET_ATTR 11
#define SDI_SET_ATTR 12
#define SDI_STATUS 13
/* Attributes */
#define SDI_ATTR_NAME 1
#define SDI_ATTR_BRK 2
#define SDI_ATTR_ABRK 3
#define SDI_ATTR_CACHE 4
#define SDI_CACHE_TYPE_M32102 0
#define SDI_CACHE_TYPE_CHAOS 1
#define SDI_ATTR_MEM_ACCESS 5
#define SDI_MEM_ACCESS_DEBUG_DMA 0
#define SDI_MEM_ACCESS_MON_CODE 1
/* Registers */
#define SDI_REG_R0 0
#define SDI_REG_R1 1
#define SDI_REG_R2 2
#define SDI_REG_R3 3
#define SDI_REG_R4 4
#define SDI_REG_R5 5
#define SDI_REG_R6 6
#define SDI_REG_R7 7
#define SDI_REG_R8 8
#define SDI_REG_R9 9
#define SDI_REG_R10 10
#define SDI_REG_R11 11
#define SDI_REG_R12 12
#define SDI_REG_FP 13
#define SDI_REG_LR 14
#define SDI_REG_SP 15
#define SDI_REG_PSW 16
#define SDI_REG_CBR 17
#define SDI_REG_SPI 18
#define SDI_REG_SPU 19
#define SDI_REG_CR4 20
#define SDI_REG_EVB 21
#define SDI_REG_BPC 22
#define SDI_REG_CR7 23
#define SDI_REG_BBPSW 24
#define SDI_REG_CR9 25
#define SDI_REG_CR10 26
#define SDI_REG_CR11 27
#define SDI_REG_CR12 28
#define SDI_REG_WR 29
#define SDI_REG_BBPC 30
#define SDI_REG_PBP 31
#define SDI_REG_ACCH 32
#define SDI_REG_ACCL 33
#define SDI_REG_ACC1H 34
#define SDI_REG_ACC1L 35
/* Low level communication functions. */
/* Check an ack packet from the target. */
static int
get_ack (void)
{
int c;
if (!sdi_desc)
return -1;
c = serial_readchar (sdi_desc, SDI_TIMEOUT);
if (c < 0)
return -1;
if (c != '+') /* error */
return -1;
return 0;
}
/* Send data to the target and check an ack packet. */
static int
send_data (const void *buf, int len)
{
if (!sdi_desc)
return -1;
if (serial_write (sdi_desc, buf, len) != 0)
return -1;
if (get_ack () == -1)
return -1;
return len;
}
/* Receive data from the target. */
static int
recv_data (void *buf, int len)
{
int total = 0;
int c;
if (!sdi_desc)
return -1;
while (total < len)
{
c = serial_readchar (sdi_desc, SDI_TIMEOUT);
if (c < 0)
return -1;
((unsigned char *) buf)[total++] = c;
}
return len;
}
/* Store unsigned long parameter on packet. */
static void
store_long_parameter (void *buf, long val)
{
val = htonl (val);
memcpy (buf, &val, 4);
}
static int
send_cmd (unsigned char cmd)
{
unsigned char buf[1];
buf[0] = cmd;
return send_data (buf, 1);
}
static int
send_one_arg_cmd (unsigned char cmd, unsigned char arg1)
{
unsigned char buf[2];
buf[0] = cmd;
buf[1] = arg1;
return send_data (buf, 2);
}
static int
send_two_arg_cmd (unsigned char cmd, unsigned char arg1, unsigned long arg2)
{
unsigned char buf[6];
buf[0] = cmd;
buf[1] = arg1;
store_long_parameter (buf + 2, arg2);
return send_data (buf, 6);
}
static int
send_three_arg_cmd (unsigned char cmd, unsigned long arg1, unsigned long arg2,
unsigned long arg3)
{
unsigned char buf[13];
buf[0] = cmd;
store_long_parameter (buf + 1, arg1);
store_long_parameter (buf + 5, arg2);
store_long_parameter (buf + 9, arg3);
return send_data (buf, 13);
}
static unsigned char
recv_char_data (void)
{
unsigned char val;
recv_data (&val, 1);
return val;
}
static unsigned long
recv_long_data (void)
{
unsigned long val;
recv_data (&val, 4);
return ntohl (val);
}
/* Check if MMU is on. */
static void
check_mmu_status (void)
{
unsigned long val;
/* Read PC address. */
if (send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BPC) == -1)
return;
val = recv_long_data ();
if ((val & 0xc0000000) == 0x80000000)
{
mmu_on = 1;
return;
}
/* Read EVB address. */
if (send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_EVB) == -1)
return;
val = recv_long_data ();
if ((val & 0xc0000000) == 0x80000000)
{
mmu_on = 1;
return;
}
mmu_on = 0;
}
/* This is called not only when we first attach, but also when the
user types "run" after having attached. */
static void
m32r_create_inferior (struct target_ops *ops, char *execfile,
char *args, char **env, int from_tty)
{
CORE_ADDR entry_pt;
if (args && *args)
error (_("Cannot pass arguments to remote STDEBUG process"));
if (execfile == 0 || exec_bfd == 0)
error (_("No executable file specified"));
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "m32r_create_inferior(%s,%s)\n", execfile,
args);
entry_pt = bfd_get_start_address (exec_bfd);
/* The "process" (board) is already stopped awaiting our commands, and
the program is already downloaded. We just set its PC and go. */
clear_proceed_status (0);
/* Tell wait_for_inferior that we've started a new process. */
init_wait_for_inferior ();
/* Set up the "saved terminal modes" of the inferior
based on what modes we are starting it with. */
target_terminal_init ();
/* Install inferior's terminal modes. */
target_terminal_inferior ();
regcache_write_pc (get_current_regcache (), entry_pt);
}
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
static void
m32r_open (const char *args, int from_tty)
{
struct hostent *host_ent;
struct sockaddr_in server_addr;
char hostname[256];
const char *port_str;
int port;
int i, n;
int yes = 1;
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "m32r_open(%d)\n", from_tty);
target_preopen (from_tty);
push_target (&m32r_ops);
if (args == NULL)
xsnprintf (hostname, sizeof (hostname), "localhost:%d", SDIPORT);
else
{
port_str = strchr (args, ':');
if (port_str == NULL)
xsnprintf (hostname, sizeof (hostname), "%s:%d", args, SDIPORT);
else
xsnprintf (hostname, sizeof (hostname), "%s", args);
}
sdi_desc = serial_open (hostname);
if (!sdi_desc)
error (_("Connection refused."));
if (get_ack () == -1)
error (_("Cannot connect to SDI target."));
if (send_cmd (SDI_OPEN) == -1)
error (_("Cannot connect to SDI target."));
/* Get maximum number of ib breakpoints. */
send_one_arg_cmd (SDI_GET_ATTR, SDI_ATTR_BRK);
max_ib_breakpoints = recv_char_data ();
if (remote_debug)
printf_filtered ("Max IB Breakpoints = %d\n", max_ib_breakpoints);
/* Initialize breakpoints. */
for (i = 0; i < MAX_BREAKPOINTS; i++)
bp_address[i] = 0xffffffff;
/* Get maximum number of access breaks. */
send_one_arg_cmd (SDI_GET_ATTR, SDI_ATTR_ABRK);
max_access_breaks = recv_char_data ();
if (remote_debug)
printf_filtered ("Max Access Breaks = %d\n", max_access_breaks);
/* Initialize access breask. */
for (i = 0; i < MAX_ACCESS_BREAKS; i++)
ab_address[i] = 0x00000000;
check_mmu_status ();
/* Get the name of chip on target board. */
send_one_arg_cmd (SDI_GET_ATTR, SDI_ATTR_NAME);
recv_data (chip_name, 64);
if (from_tty)
printf_filtered ("Remote %s connected to %s\n", target_shortname,
chip_name);
}
/* Close out all files and local state before this target loses control. */
static void
m32r_close (struct target_ops *self)
{
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "m32r_close()\n");
if (sdi_desc)
{
send_cmd (SDI_CLOSE);
serial_close (sdi_desc);
sdi_desc = NULL;
}
inferior_ptid = null_ptid;
delete_thread_silent (remote_m32r_ptid);
return;
}
/* Tell the remote machine to resume. */
static void
m32r_resume (struct target_ops *ops,
ptid_t ptid, int step, enum gdb_signal sig)
{
unsigned long pc_addr, bp_addr, ab_addr;
int ib_breakpoints;
unsigned char buf[13];
int i;
if (remote_debug)
{
if (step)
fprintf_unfiltered (gdb_stdlog, "\nm32r_resume(step)\n");
else
fprintf_unfiltered (gdb_stdlog, "\nm32r_resume(cont)\n");
}
check_mmu_status ();
pc_addr = regcache_read_pc (get_current_regcache ());
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "pc <= 0x%lx\n", pc_addr);
/* At pc address there is a parallel instruction with +2 offset,
so we have to make it a serial instruction or avoid it. */
if (pc_addr == last_pc_addr)
{
/* Avoid a parallel nop. */
if (last_pc_addr_data[0] == 0xf0 && last_pc_addr_data[1] == 0x00)
{
pc_addr += 2;
/* Now we can forget this instruction. */
last_pc_addr = 0xffffffff;
}
/* Clear a parallel bit. */
else
{
buf[0] = SDI_WRITE_MEMORY;
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
store_long_parameter (buf + 1, pc_addr);
else
store_long_parameter (buf + 1, pc_addr - 1);
store_long_parameter (buf + 5, 1);
buf[9] = last_pc_addr_data[0] & 0x7f;
send_data (buf, 10);
}
}
/* Set PC. */
send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_BPC, pc_addr);
/* step mode. */
step_mode = step;
if (step)
{
/* Set PBP. */
send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_PBP, pc_addr | 1);
}
else
{
/* Unset PBP. */
send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_PBP, 0x00000000);
}
if (use_ib_breakpoints)
ib_breakpoints = max_ib_breakpoints;
else
ib_breakpoints = 0;
/* Set ib breakpoints. */
for (i = 0; i < ib_breakpoints; i++)
{
bp_addr = bp_address[i];
if (bp_addr == 0xffffffff)
continue;
/* Set PBP. */
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8000 + 4 * i, 4,
0x00000006);
else
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8000 + 4 * i, 4,
0x06000000);
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8080 + 4 * i, 4, bp_addr);
}
/* Set dbt breakpoints. */
for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
{
bp_addr = bp_address[i];
if (bp_addr == 0xffffffff)
continue;
if (!mmu_on)
bp_addr &= 0x7fffffff;
/* Write DBT instruction. */
buf[0] = SDI_WRITE_MEMORY;
store_long_parameter (buf + 1, (bp_addr & 0xfffffffc));
store_long_parameter (buf + 5, 4);
if ((bp_addr & 2) == 0 && bp_addr != (pc_addr & 0xfffffffc))
{
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
{
buf[9] = dbt_bp_entry[0];
buf[10] = dbt_bp_entry[1];
buf[11] = dbt_bp_entry[2];
buf[12] = dbt_bp_entry[3];
}
else
{
buf[9] = dbt_bp_entry[3];
buf[10] = dbt_bp_entry[2];
buf[11] = dbt_bp_entry[1];
buf[12] = dbt_bp_entry[0];
}
}
else
{
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
{
if ((bp_addr & 2) == 0)
{
buf[9] = dbt_bp_entry[0];
buf[10] = dbt_bp_entry[1];
buf[11] = bp_data[i][2] & 0x7f;
buf[12] = bp_data[i][3];
}
else
{
buf[9] = bp_data[i][0];
buf[10] = bp_data[i][1];
buf[11] = dbt_bp_entry[0];
buf[12] = dbt_bp_entry[1];
}
}
else
{
if ((bp_addr & 2) == 0)
{
buf[9] = bp_data[i][0];
buf[10] = bp_data[i][1] & 0x7f;
buf[11] = dbt_bp_entry[1];
buf[12] = dbt_bp_entry[0];
}
else
{
buf[9] = dbt_bp_entry[1];
buf[10] = dbt_bp_entry[0];
buf[11] = bp_data[i][2];
buf[12] = bp_data[i][3];
}
}
}
send_data (buf, 13);
}
/* Set access breaks. */
for (i = 0; i < max_access_breaks; i++)
{
ab_addr = ab_address[i];
if (ab_addr == 0x00000000)
continue;
/* DBC register. */
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
{
switch (ab_type[i])
{
case 0: /* write watch */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x00000086);
break;
case 1: /* read watch */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x00000046);
break;
case 2: /* access watch */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x00000006);
break;
}
}
else
{
switch (ab_type[i])
{
case 0: /* write watch */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x86000000);
break;
case 1: /* read watch */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x46000000);
break;
case 2: /* access watch */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x06000000);
break;
}
}
/* DBAH register. */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8180 + 4 * i, 4, ab_addr);
/* DBAL register. */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8200 + 4 * i, 4,
0xffffffff);
/* DBD register. */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8280 + 4 * i, 4,
0x00000000);
/* DBDM register. */
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8300 + 4 * i, 4,
0x00000000);
}
/* Resume program. */
send_cmd (SDI_EXEC_CPU);
/* Without this, some commands which require an active target (such as kill)
won't work. This variable serves (at least) double duty as both the pid
of the target process (if it has such), and as a flag indicating that a
target is active. These functions should be split out into seperate
variables, especially since GDB will someday have a notion of debugging
several processes. */
inferior_ptid = remote_m32r_ptid;
add_thread_silent (remote_m32r_ptid);
return;
}
/* Wait until the remote machine stops, then return,
storing status in STATUS just as `wait' would. */
static void
gdb_cntrl_c (int signo)
{
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "interrupt\n");
interrupted = 1;
}
static ptid_t
m32r_wait (struct target_ops *ops,
ptid_t ptid, struct target_waitstatus *status, int options)
{
static sighandler_t prev_sigint;
unsigned long bp_addr, pc_addr;
int ib_breakpoints;
long i;
unsigned char buf[13];
int ret, c;
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "m32r_wait()\n");
status->kind = TARGET_WAITKIND_EXITED;
status->value.sig = GDB_SIGNAL_0;
interrupted = 0;
prev_sigint = signal (SIGINT, gdb_cntrl_c);
/* Wait for ready. */
buf[0] = SDI_WAIT_FOR_READY;
if (serial_write (sdi_desc, buf, 1) != 0)
error (_("Remote connection closed"));
while (1)
{
c = serial_readchar (sdi_desc, SDI_TIMEOUT);
if (c < 0)
error (_("Remote connection closed"));
if (c == '-') /* error */
{
status->kind = TARGET_WAITKIND_STOPPED;
status->value.sig = GDB_SIGNAL_HUP;
return inferior_ptid;
}
else if (c == '+') /* stopped */
break;
if (interrupted)
ret = serial_write (sdi_desc, "!", 1); /* packet to interrupt */
else
ret = serial_write (sdi_desc, ".", 1); /* packet to wait */
if (ret != 0)
error (_("Remote connection closed"));
}
status->kind = TARGET_WAITKIND_STOPPED;
if (interrupted)
status->value.sig = GDB_SIGNAL_INT;
else
status->value.sig = GDB_SIGNAL_TRAP;
interrupted = 0;
signal (SIGINT, prev_sigint);
check_mmu_status ();
/* Recover parallel bit. */
if (last_pc_addr != 0xffffffff)
{
buf[0] = SDI_WRITE_MEMORY;
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
store_long_parameter (buf + 1, last_pc_addr);
else
store_long_parameter (buf + 1, last_pc_addr - 1);
store_long_parameter (buf + 5, 1);
buf[9] = last_pc_addr_data[0];
send_data (buf, 10);
last_pc_addr = 0xffffffff;
}
if (use_ib_breakpoints)
ib_breakpoints = max_ib_breakpoints;
else
ib_breakpoints = 0;
/* Set back pc by 2 if m32r is stopped with dbt. */
last_pc_addr = 0xffffffff;
send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BPC);
pc_addr = recv_long_data () - 2;
for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
{
if (pc_addr == bp_address[i])
{
send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_BPC, pc_addr);
/* If there is a parallel instruction with +2 offset at pc
address, we have to take care of it later. */
if ((pc_addr & 0x2) != 0)
{
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
{
if ((bp_data[i][2] & 0x80) != 0)
{
last_pc_addr = pc_addr;
last_pc_addr_data[0] = bp_data[i][2];
last_pc_addr_data[1] = bp_data[i][3];
}
}
else
{
if ((bp_data[i][1] & 0x80) != 0)
{
last_pc_addr = pc_addr;
last_pc_addr_data[0] = bp_data[i][1];
last_pc_addr_data[1] = bp_data[i][0];
}
}
}
break;
}
}
/* Remove ib breakpoints. */
for (i = 0; i < ib_breakpoints; i++)
{
if (bp_address[i] != 0xffffffff)
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8000 + 4 * i, 4,
0x00000000);
}
/* Remove dbt breakpoints. */
for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
{
bp_addr = bp_address[i];
if (bp_addr != 0xffffffff)
{
if (!mmu_on)
bp_addr &= 0x7fffffff;
buf[0] = SDI_WRITE_MEMORY;
store_long_parameter (buf + 1, bp_addr & 0xfffffffc);
store_long_parameter (buf + 5, 4);
buf[9] = bp_data[i][0];
buf[10] = bp_data[i][1];
buf[11] = bp_data[i][2];
buf[12] = bp_data[i][3];
send_data (buf, 13);
}
}
/* Remove access breaks. */
hit_watchpoint_addr = 0;
for (i = 0; i < max_access_breaks; i++)
{
if (ab_address[i] != 0x00000000)
{
buf[0] = SDI_READ_MEMORY;
store_long_parameter (buf + 1, 0xffff8100 + 4 * i);
store_long_parameter (buf + 5, 4);
serial_write (sdi_desc, buf, 9);
c = serial_readchar (sdi_desc, SDI_TIMEOUT);
if (c != '-' && recv_data (buf, 4) != -1)
{
if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
{
if ((buf[3] & 0x1) == 0x1)
hit_watchpoint_addr = ab_address[i];
}
else
{
if ((buf[0] & 0x1) == 0x1)
hit_watchpoint_addr = ab_address[i];
}
}
send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
0x00000000);
}
}
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "pc => 0x%lx\n", pc_addr);
return inferior_ptid;
}
/* Terminate the open connection to the remote debugger.
Use this when you want to detach and do something else
with your gdb. */
static void
m32r_detach (struct target_ops *ops, const char *args, int from_tty)
{
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "m32r_detach(%d)\n", from_tty);
m32r_resume (ops, inferior_ptid, 0, GDB_SIGNAL_0);
/* Calls m32r_close to do the real work. */
unpush_target (ops);
if (from_tty)
fprintf_unfiltered (gdb_stdlog, "Ending remote %s debugging\n",
target_shortname);
}
/* Return the id of register number REGNO. */
static int
get_reg_id (int regno)
{
switch (regno)
{
case 20:
return SDI_REG_BBPC;
case 21:
return SDI_REG_BPC;
case 22:
return SDI_REG_ACCL;
case 23:
return SDI_REG_ACCH;
case 24:
return SDI_REG_EVB;
}
return regno;
}
/* Fetch register REGNO, or all registers if REGNO is -1.
Returns errno value. */
static void
m32r_fetch_register (struct target_ops *ops,
struct regcache *regcache, int regno)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
unsigned long val, val2, regid;
if (regno == -1)
{
for (regno = 0;
regno < gdbarch_num_regs (get_regcache_arch (regcache));
regno++)
m32r_fetch_register (ops, regcache, regno);
}
else
{
gdb_byte buffer[MAX_REGISTER_SIZE];
regid = get_reg_id (regno);
send_one_arg_cmd (SDI_READ_CPU_REG, regid);
val = recv_long_data ();
if (regid == SDI_REG_PSW)
{
send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BBPSW);
val2 = recv_long_data ();
val = ((0x00cf & val2) << 8) | ((0xcf00 & val) >> 8);
}
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "m32r_fetch_register(%d,0x%08lx)\n",
regno, val);
/* We got the number the register holds, but gdb expects to see a
value in the target byte ordering. */
store_unsigned_integer (buffer, 4, byte_order, val);
regcache_raw_supply (regcache, regno, buffer);
}
return;
}
/* Store register REGNO, or all if REGNO == 0.
Return errno value. */
static void
m32r_store_register (struct target_ops *ops,
struct regcache *regcache, int regno)
{
int regid;
ULONGEST regval, tmp;
if (regno == -1)
{
for (regno = 0;
regno < gdbarch_num_regs (get_regcache_arch (regcache));
regno++)
m32r_store_register (ops, regcache, regno);
}
else
{
regcache_cooked_read_unsigned (regcache, regno, ®val);
regid = get_reg_id (regno);
if (regid == SDI_REG_PSW)
{
unsigned long psw, bbpsw;
send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_PSW);
psw = recv_long_data ();
send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BBPSW);
bbpsw = recv_long_data ();
tmp = (0x00cf & psw) | ((0x00cf & regval) << 8);
send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_PSW, tmp);
tmp = (0x0030 & bbpsw) | ((0xcf00 & regval) >> 8);
send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_BBPSW, tmp);
}
else
{
send_two_arg_cmd (SDI_WRITE_CPU_REG, regid, regval);