mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 03:03:31 +08:00
93584146c5
mode ICE. * remote-utils.c (sr_com): Call registers_changed. * configure.in (m68*-*-est*): New configuration. * config/m68k/tm-est.h: New file.
590 lines
12 KiB
C
590 lines
12 KiB
C
/* Remote debugging interface for EST-300 ICE, for GDB
|
|
Copyright 1994 Free Software Foundation, Inc.
|
|
Contributed by Cygnus Support.
|
|
|
|
Written by Steve Chamberlain for Cygnus Support.
|
|
|
|
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
|
|
#include "defs.h"
|
|
#include "command.h"
|
|
#include "gdbcore.h"
|
|
#include "target.h"
|
|
#include "wait.h"
|
|
#include <varargs.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include "serial.h"
|
|
#include "remote-utils.h"
|
|
|
|
|
|
static void expect_char PARAMS ((int));
|
|
|
|
|
|
static void
|
|
write_and_expect (x)
|
|
char *x;
|
|
{
|
|
sr_write_cr (x);
|
|
sr_expect (x);
|
|
}
|
|
|
|
static void
|
|
expect_char (want)
|
|
int want;
|
|
{
|
|
int c = sr_readchar ();
|
|
while (c != want)
|
|
c = sr_readchar ();
|
|
}
|
|
|
|
|
|
static void
|
|
expect_prompt ()
|
|
{
|
|
expect_char ('>');
|
|
}
|
|
|
|
static int
|
|
get_hex_digit (ch)
|
|
int ch;
|
|
{
|
|
if (ch >= '0' && ch <= '9')
|
|
return ch - '0';
|
|
else if (ch >= 'A' && ch <= 'F')
|
|
return ch - 'A' + 10;
|
|
else if (ch >= 'a' && ch <= 'f')
|
|
return ch - 'a' + 10;
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
get_hex (start)
|
|
int *start;
|
|
{
|
|
int value = get_hex_digit (*start);
|
|
int try;
|
|
|
|
*start = sr_readchar ();
|
|
while ((try = get_hex_digit (*start)) >= 0)
|
|
{
|
|
value <<= 4;
|
|
value += try;
|
|
*start = sr_readchar ();
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/* Tell the remote machine to resume. */
|
|
|
|
static void
|
|
est_resume (pid, step, sig)
|
|
int pid, step, sig;
|
|
{
|
|
write_and_expect (step ? ".SI" : ".GO");
|
|
}
|
|
|
|
/* A reg dump looks like
|
|
D0 = 00000000 D1 = 00000000 D2 = 00000000 D3 = 00000000
|
|
D4 = 00000000 D5 = 00000000 D6 = 00000000 D7 = 00000000
|
|
A0 = 00000000 A1 = 00000000 A2 = 00000000 A3 = 00000000
|
|
A4 = 00000000 A5 = 00000000 A6 = 00000000 A7 = 001104FE
|
|
USP = 00110400 SSP*= 001104FE PC = 00229BBC SR = 2000
|
|
VBR = 00110000 SFC = 0005 DFC = 0005
|
|
|
|
or
|
|
|
|
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00001234 00000000 001104FE 00110400 001104FE 00229BBC 2000 00110000 0005 0005
|
|
*/
|
|
|
|
static int
|
|
target_to_gdb_rn (rn)
|
|
int rn;
|
|
{
|
|
if (rn < 16)
|
|
return rn;
|
|
if (rn == 18)
|
|
return PC_REGNUM;
|
|
if (rn == 19)
|
|
return PS_REGNUM;
|
|
return -1;
|
|
}
|
|
|
|
|
|
static void est_fetch_register ();
|
|
static void
|
|
est_fetch_registers ()
|
|
{
|
|
int regno;
|
|
unsigned long val;
|
|
int c;
|
|
int target_rn;
|
|
char buf[4];
|
|
write_and_expect (".DR");
|
|
buf[0] = 0;
|
|
buf[1] = 0;
|
|
buf[2] = 0;
|
|
buf[3] = 0;
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
supply_register (regno, buf);
|
|
|
|
c = sr_readchar ();
|
|
for (target_rn = 0; target_rn < 23; target_rn++)
|
|
{
|
|
unsigned long val;
|
|
while (!isdigit (c) && !isalpha (c))
|
|
c = sr_readchar ();
|
|
|
|
while (isdigit (c) || (c >= 'A' && c <= 'F'))
|
|
{
|
|
val <<= 4;
|
|
if (isdigit (c))
|
|
val = val + c - '0';
|
|
else
|
|
val = val + c - 'A' + 10;
|
|
c = sr_readchar ();
|
|
}
|
|
|
|
regno = target_to_gdb_rn (target_rn);
|
|
if (regno >= 0)
|
|
{
|
|
buf[0] = val >> 24;
|
|
buf[1] = val >> 16;
|
|
buf[2] = val >> 8;
|
|
buf[3] = val >> 0;
|
|
supply_register (regno, buf);
|
|
}
|
|
}
|
|
expect_prompt();
|
|
}
|
|
|
|
/* Fetch register REGNO, or all registers if REGNO is -1.
|
|
Returns errno value. */
|
|
|
|
static
|
|
void
|
|
est_fetch_register (regno)
|
|
int regno;
|
|
{
|
|
est_fetch_registers ();
|
|
}
|
|
|
|
/* Store the remote registers from the contents of the block REGS. */
|
|
|
|
static void est_store_register ();
|
|
static void
|
|
est_store_registers ()
|
|
{
|
|
int regno;
|
|
|
|
for (regno = 0; regno < 18; regno++)
|
|
est_store_register (regno);
|
|
registers_changed ();
|
|
}
|
|
|
|
/* Store register REGNO, or all if REGNO == 0.
|
|
Return errno value. */
|
|
static void
|
|
est_store_register (regno)
|
|
int regno;
|
|
{
|
|
char buf[20];
|
|
if (regno == -1)
|
|
{
|
|
est_store_registers ();
|
|
return;
|
|
}
|
|
|
|
if (regno < 8)
|
|
sprintf (buf, ".SR D%d %x", regno, read_register (regno));
|
|
else if (regno < 16)
|
|
sprintf (buf, ".SR A%d %x", regno - 8, read_register (regno));
|
|
else if (regno == PC_REGNUM)
|
|
sprintf (buf, ".SR PC %x", read_register (regno));
|
|
else if (regno == PS_REGNUM)
|
|
sprintf (buf, ".SR SR %x", read_register (regno));
|
|
else
|
|
return;
|
|
write_and_expect (buf);
|
|
expect_prompt ();
|
|
}
|
|
|
|
/* Get ready to modify the registers array. On machines which store
|
|
individual registers, this doesn't need to do anything. On machines
|
|
which store all the registers in one fell swoop, this makes sure
|
|
that registers contains all the registers from the program being
|
|
debugged. */
|
|
|
|
|
|
static
|
|
int
|
|
stickbyte (where, what)
|
|
char *where;
|
|
unsigned int what;
|
|
{
|
|
static CONST char digs[] = "0123456789ABCDEF";
|
|
where[0] = digs[(what >> 4) & 0xf];
|
|
where[1] = digs[(what & 0xf) & 0xf];
|
|
return what;
|
|
}
|
|
|
|
/* Copy LEN bytes of data from debugger memory at MYADDR
|
|
to inferior's memory at MEMADDR. Returns length moved. */
|
|
|
|
static int
|
|
est_write_memory (memaddr, myaddr, len)
|
|
CORE_ADDR memaddr;
|
|
unsigned char *myaddr;
|
|
int len;
|
|
{
|
|
int i;
|
|
#define maxstride 128
|
|
int stride;
|
|
|
|
write_and_expect (".DL");
|
|
expect_char ('+');
|
|
for (i = 0; i < len; i += stride)
|
|
{
|
|
char compose[maxstride * 2 + 50];
|
|
int address = i + memaddr;
|
|
int j;
|
|
int check_sum;
|
|
int where = 0;
|
|
int alen;
|
|
stride = len - i;
|
|
if (stride > maxstride)
|
|
stride = maxstride;
|
|
|
|
compose[where++] = 'S';
|
|
check_sum = 0;
|
|
if (address >= 0xffffff)
|
|
{
|
|
alen = 4;
|
|
}
|
|
else if (address >= 0xffff)
|
|
{
|
|
alen = 3;
|
|
}
|
|
else
|
|
alen = 2;
|
|
compose[where++] = alen - 1 + '0'; /* insert type */
|
|
check_sum += stickbyte (compose + where, alen + stride + 1); /* Insert length */
|
|
where += 2;
|
|
while (alen > 0)
|
|
{
|
|
alen--;
|
|
check_sum += stickbyte (compose + where, address >> (8 * (alen)));
|
|
where += 2;
|
|
}
|
|
|
|
for (j = 0; j < stride; j++)
|
|
{
|
|
check_sum += stickbyte (compose + where, myaddr[i + j]);
|
|
where += 2;
|
|
}
|
|
|
|
stickbyte (compose + where, ~check_sum);
|
|
|
|
where += 2;
|
|
compose[where++] = 0;
|
|
|
|
sr_write_cr (compose);
|
|
while (sr_readchar () != '+')
|
|
sr_write_cr (compose);
|
|
}
|
|
|
|
/* Send the trailer record */
|
|
sr_write_cr ("S70500000000FA");
|
|
expect_prompt ();
|
|
return len;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
The dump memory command generates output which looks like:
|
|
|
|
|
|
.dmb 0 100
|
|
4E 56 FF FC 4E 71 42 AE FF FC 72 09 B2 AE FF FC NV..NqB...r.....
|
|
6C 02 60 12 2F 2E FF FC 4E B9 00 00 00 2A 58 4F l.`./...N....*XO
|
|
52 AE FF FC 60 E4 4E 5E 4E 75 4E 56 00 00 20 2E R...`.N^NuNV.. .
|
|
00 08 D1 B9 00 00 00 00 4E 5E 4E 75 06 46 40 54 ........N^Nu.F@T
|
|
04 45 44 4C 54 45 40 56 42 F4 04 64 24 45 05 05 .EDLTE@VB..d$E..
|
|
00 6D 04 46 00 45 4C 05 04 46 04 4C 44 CD 00 65 .m.F.EL..F.LD..e
|
|
40 45 44 55 45 45 45 46 04 44 44 40 05 4D 00 44 @EDUEEEF.DD@.M.D
|
|
|
|
*/
|
|
|
|
static int
|
|
est_read_memory (memaddr, myaddr, len)
|
|
CORE_ADDR memaddr;
|
|
unsigned char *myaddr;
|
|
int len;
|
|
{
|
|
int count;
|
|
int c;
|
|
char buf[20];
|
|
/* Starting address of this pass. */
|
|
|
|
if (((memaddr - 1) + len) < memaddr)
|
|
{
|
|
errno = EIO;
|
|
return 0;
|
|
}
|
|
|
|
sprintf (buf, ".dmb %x %x", memaddr, len);
|
|
write_and_expect (buf);
|
|
count = 0;
|
|
|
|
c = sr_readchar ();
|
|
|
|
while (count < len)
|
|
{
|
|
while (!isdigit (c) && !isalpha (c)) {
|
|
if (c == '!')
|
|
{
|
|
expect_prompt();
|
|
errno =EIO;
|
|
return 0;
|
|
|
|
}
|
|
c = sr_readchar ();
|
|
}
|
|
myaddr[count++] = get_hex (&c);
|
|
c = sr_readchar ();
|
|
if (c == ' ')
|
|
{
|
|
c = sr_readchar ();
|
|
if (c == ' ')
|
|
while (c != '\r')
|
|
c = sr_readchar ();
|
|
}
|
|
}
|
|
|
|
expect_prompt ();
|
|
|
|
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
est_xfer_inferior_memory (memaddr, myaddr, len, write, target)
|
|
CORE_ADDR memaddr;
|
|
unsigned char *myaddr;
|
|
int len;
|
|
int write;
|
|
struct target_ops *target; /* ignored */
|
|
{
|
|
if (write)
|
|
{
|
|
return est_write_memory (memaddr, myaddr, len);
|
|
}
|
|
else
|
|
{
|
|
return est_read_memory (memaddr, myaddr, len);
|
|
}
|
|
}
|
|
|
|
|
|
#define MAX_DEBUG_BREAKPOINTS 100
|
|
|
|
extern int memory_breakpoint_size;
|
|
static CORE_ADDR breakaddr[MAX_DEBUG_BREAKPOINTS] =
|
|
{0};
|
|
|
|
int
|
|
est_clear_all_breakpoints ()
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAX_DEBUG_BREAKPOINTS; i++)
|
|
{
|
|
breakaddr[i] = 0;
|
|
}
|
|
|
|
if (sr_is_open ())
|
|
{
|
|
write_and_expect (".RB");
|
|
expect_prompt ();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
est_insert_breakpoint (addr, shadow)
|
|
CORE_ADDR addr;
|
|
unsigned char *shadow;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= MAX_DEBUG_BREAKPOINTS; i++)
|
|
if (breakaddr[i] == 0)
|
|
{
|
|
char buf[20];
|
|
breakaddr[i] = addr;
|
|
sprintf (buf, ".SB %x", addr);
|
|
write_and_expect (buf);
|
|
expect_prompt ();
|
|
return 0;
|
|
}
|
|
error ("Too many breakpoints ( > %d) for the est\n", MAX_DEBUG_BREAKPOINTS);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
est_remove_breakpoint (addr, shadow)
|
|
CORE_ADDR addr;
|
|
unsigned char *shadow;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_DEBUG_BREAKPOINTS; i++)
|
|
if (breakaddr[i] == addr)
|
|
{
|
|
char buf[20];
|
|
breakaddr[i] = 0;
|
|
sprintf (buf, ".RB %x", addr);
|
|
write_and_expect (buf);
|
|
expect_prompt ();
|
|
return 0;
|
|
}
|
|
|
|
error ("Can't find breakpoint associated with 0x%x\n", addr);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* Wait until the remote machine stops, then return,
|
|
storing status in STATUS just as `wait' would. */
|
|
|
|
static int
|
|
est_wait (pid, status)
|
|
int pid;
|
|
struct target_waitstatus *status;
|
|
{
|
|
int c = sr_readchar ();
|
|
while (c != '!')
|
|
c = sr_readchar ();
|
|
/* What sort of stop */
|
|
c = sr_readchar ();
|
|
status->kind = TARGET_WAITKIND_STOPPED;
|
|
switch (c)
|
|
{
|
|
case 'E':
|
|
status->value.sig = TARGET_SIGNAL_BUS;
|
|
break;
|
|
/* Address error */
|
|
case 'A':
|
|
status->value.sig = TARGET_SIGNAL_BUS;
|
|
break;
|
|
/* Break */
|
|
case 'B':
|
|
status->value.sig = TARGET_SIGNAL_TRAP;
|
|
break;
|
|
}
|
|
expect_prompt ();
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
est_checkin ()
|
|
{
|
|
write_and_expect (".in");
|
|
gr_expect_prompt ();
|
|
}
|
|
|
|
extern struct gr_settings est_settings;
|
|
|
|
static void
|
|
est_open (args, from_tty)
|
|
char *args;
|
|
int from_tty;
|
|
{
|
|
gr_open (args, from_tty, &est_settings);
|
|
}
|
|
|
|
/* Define the target subroutine names */
|
|
|
|
struct target_ops est_ops =
|
|
{
|
|
"est",
|
|
"Remote EST-300 target",
|
|
"Use a remote EST-300 ICE connected by a serial line,\n\
|
|
or a network connection.\n\
|
|
Arguments are the name of the device for the serial line,\n\
|
|
the speed to connect at in bits per second.\n\
|
|
eg\n\
|
|
target est /dev/ttya 9600\n\
|
|
target est foobar",
|
|
est_open,
|
|
gr_close,
|
|
0,
|
|
gr_detach,
|
|
est_resume,
|
|
est_wait,
|
|
est_fetch_register,
|
|
est_store_register,
|
|
gr_prepare_to_store,
|
|
est_xfer_inferior_memory,
|
|
gr_files_info,
|
|
est_insert_breakpoint,
|
|
est_remove_breakpoint, /* Breakpoints */
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0, /* Terminal handling */
|
|
gr_kill,
|
|
gr_load_image, /* load */
|
|
0, /* lookup_symbol */
|
|
gr_create_inferior,
|
|
gr_mourn,
|
|
0, /* can_run */
|
|
0, /* notice_signals */
|
|
0, /* to_stop */
|
|
process_stratum,
|
|
0, /* next */
|
|
1,
|
|
1,
|
|
1,
|
|
1,
|
|
1, /* all mem, mem, stack, regs, exec */
|
|
0,
|
|
0, /* Section pointers */
|
|
OPS_MAGIC, /* Always the last thing */
|
|
};
|
|
|
|
static struct gr_settings est_settings =
|
|
{
|
|
NULL, /* dcache */
|
|
">", /* prompt */
|
|
&est_ops, /* ops */
|
|
est_clear_all_breakpoints,
|
|
est_read_memory, /* readfunc */
|
|
est_write_memory, /* writefunc */
|
|
est_checkin, /* checkin */
|
|
};
|
|
|
|
void
|
|
_initialize_remote_est ()
|
|
{
|
|
add_target (&est_ops);
|
|
}
|